From 274149dd14909d4ba87f25f8e5160f51ca5f7265 Mon Sep 17 00:00:00 2001 From: Antoine GIRARD Date: Wed, 14 Jun 2017 02:43:43 +0200 Subject: [PATCH] Switch to keybase go-crypto (for some elliptic curve key) + test (#1925) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * Switch to keybase go-crypto (for some elliptic curve key) + test * Use assert.NoError and add a little more context to failing test description * Use assert.(No)Error everywhere 🌈 and assert.Error in place of .Nil/.NotNil --- models/gpg_key.go | 6 +- models/gpg_key_test.go | 41 +- vendor/github.com/keybase/go-crypto/LICENSE | 27 + vendor/github.com/keybase/go-crypto/PATENTS | 22 + .../keybase/go-crypto/brainpool/brainpool.go | 134 ++ .../keybase/go-crypto/brainpool/rcurve.go | 83 + .../keybase/go-crypto}/cast5/cast5.go | 2 +- .../go-crypto/curve25519/const_amd64.s | 20 + .../go-crypto/curve25519/cswap_amd64.s | 88 + .../go-crypto/curve25519/curve25519.go | 841 ++++++++ .../go-crypto/curve25519/curve_impl.go | 113 ++ .../keybase/go-crypto/curve25519/doc.go | 23 + .../go-crypto/curve25519/freeze_amd64.s | 94 + .../go-crypto/curve25519/ladderstep_amd64.s | 1398 +++++++++++++ .../go-crypto/curve25519/mont25519_amd64.go | 240 +++ .../keybase/go-crypto/curve25519/mul_amd64.s | 191 ++ .../go-crypto/curve25519/square_amd64.s | 153 ++ .../keybase/go-crypto/ed25519/ed25519.go | 181 ++ .../ed25519/internal/edwards25519/const.go | 1422 +++++++++++++ .../internal/edwards25519/edwards25519.go | 1771 +++++++++++++++++ .../keybase/go-crypto}/openpgp/armor/armor.go | 48 +- .../go-crypto}/openpgp/armor/encode.go | 2 +- .../go-crypto}/openpgp/canonical_text.go | 0 .../keybase/go-crypto/openpgp/ecdh/ecdh.go | 282 +++ .../go-crypto}/openpgp/elgamal/elgamal.go | 2 +- .../go-crypto}/openpgp/errors/errors.go | 2 +- .../keybase/go-crypto/openpgp/keys.go | 902 +++++++++ .../go-crypto}/openpgp/packet/compressed.go | 3 +- .../go-crypto}/openpgp/packet/config.go | 7 + .../keybase/go-crypto/openpgp/packet/ecdh.go | 104 + .../openpgp/packet/encrypted_key.go | 35 +- .../go-crypto}/openpgp/packet/literal.go | 0 .../keybase/go-crypto}/openpgp/packet/ocfb.go | 0 .../openpgp/packet/one_pass_signature.go | 5 +- .../go-crypto}/openpgp/packet/opaque.go | 2 +- .../go-crypto}/openpgp/packet/packet.go | 58 +- .../go-crypto}/openpgp/packet/private_key.go | 272 ++- .../go-crypto}/openpgp/packet/public_key.go | 258 ++- .../openpgp/packet/public_key_v3.go | 13 +- .../go-crypto}/openpgp/packet/reader.go | 4 +- .../go-crypto}/openpgp/packet/signature.go | 245 ++- .../go-crypto}/openpgp/packet/signature_v3.go | 4 +- .../openpgp/packet/symmetric_key_encrypted.go | 7 +- .../openpgp/packet/symmetrically_encrypted.go | 3 +- .../openpgp/packet/userattribute.go | 0 .../go-crypto}/openpgp/packet/userid.go | 0 .../keybase/go-crypto/openpgp/patch.sh | 7 + .../keybase/go-crypto}/openpgp/read.go | 61 +- .../keybase/go-crypto}/openpgp/s2k/s2k.go | 59 +- .../keybase/go-crypto/openpgp/sig-v3.patch | 135 ++ .../keybase/go-crypto}/openpgp/write.go | 151 +- .../keybase/go-crypto/rsa/pkcs1v15.go | 325 +++ .../github.com/keybase/go-crypto/rsa/pss.go | 297 +++ .../github.com/keybase/go-crypto/rsa/rsa.go | 646 ++++++ vendor/golang.org/x/crypto/openpgp/keys.go | 637 ------ vendor/vendor.json | 120 +- 56 files changed, 10621 insertions(+), 925 deletions(-) create mode 100644 vendor/github.com/keybase/go-crypto/LICENSE create mode 100644 vendor/github.com/keybase/go-crypto/PATENTS create mode 100644 vendor/github.com/keybase/go-crypto/brainpool/brainpool.go create mode 100644 vendor/github.com/keybase/go-crypto/brainpool/rcurve.go rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/cast5/cast5.go (99%) create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/const_amd64.s create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/cswap_amd64.s create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/curve25519.go create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/curve_impl.go create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/doc.go create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/freeze_amd64.s create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/ladderstep_amd64.s create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/mont25519_amd64.go create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/mul_amd64.s create mode 100644 vendor/github.com/keybase/go-crypto/curve25519/square_amd64.s create mode 100644 vendor/github.com/keybase/go-crypto/ed25519/ed25519.go create mode 100644 vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/const.go create mode 100644 vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/edwards25519.go rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/armor/armor.go (82%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/armor/encode.go (98%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/canonical_text.go (100%) create mode 100644 vendor/github.com/keybase/go-crypto/openpgp/ecdh/ecdh.go rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/elgamal/elgamal.go (97%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/errors/errors.go (96%) create mode 100644 vendor/github.com/keybase/go-crypto/openpgp/keys.go rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/compressed.go (98%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/config.go (92%) create mode 100644 vendor/github.com/keybase/go-crypto/openpgp/packet/ecdh.go rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/encrypted_key.go (86%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/literal.go (100%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/ocfb.go (100%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/one_pass_signature.go (94%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/opaque.go (98%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/packet.go (90%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/private_key.go (53%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/public_key.go (73%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/public_key_v3.go (97%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/reader.go (97%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/signature.go (76%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/signature_v3.go (97%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/symmetric_key_encrypted.go (95%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/symmetrically_encrypted.go (99%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/userattribute.go (100%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/packet/userid.go (100%) create mode 100644 vendor/github.com/keybase/go-crypto/openpgp/patch.sh rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/read.go (87%) rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/s2k/s2k.go (83%) create mode 100644 vendor/github.com/keybase/go-crypto/openpgp/sig-v3.patch rename vendor/{golang.org/x/crypto => github.com/keybase/go-crypto}/openpgp/write.go (74%) create mode 100644 vendor/github.com/keybase/go-crypto/rsa/pkcs1v15.go create mode 100644 vendor/github.com/keybase/go-crypto/rsa/pss.go create mode 100644 vendor/github.com/keybase/go-crypto/rsa/rsa.go delete mode 100644 vendor/golang.org/x/crypto/openpgp/keys.go diff --git a/models/gpg_key.go b/models/gpg_key.go index 862bd8859..6a5daf636 100644 --- a/models/gpg_key.go +++ b/models/gpg_key.go @@ -19,9 +19,9 @@ import ( "code.gitea.io/gitea/modules/log" "github.com/go-xorm/xorm" - "golang.org/x/crypto/openpgp" - "golang.org/x/crypto/openpgp/armor" - "golang.org/x/crypto/openpgp/packet" + "github.com/keybase/go-crypto/openpgp" + "github.com/keybase/go-crypto/openpgp/armor" + "github.com/keybase/go-crypto/openpgp/packet" ) // GPGKey represents a GPG key. diff --git a/models/gpg_key_test.go b/models/gpg_key_test.go index 507cfabd2..cc70096d0 100644 --- a/models/gpg_key_test.go +++ b/models/gpg_key_test.go @@ -43,7 +43,28 @@ MkM/fdpyc2hY7Dl/+qFmN5MG5yGmMpQcX+RNNR222ibNC1D3wg== -----END PGP PUBLIC KEY BLOCK-----` key, err := checkArmoredGPGKeyString(testGPGArmor) - assert.Nil(t, err, "Could not parse a valid GPG armored key", key) + assert.NoError(t, err, "Could not parse a valid GPG public armored rsa key", key) + //TODO verify value of key +} + +func TestCheckArmoredbrainpoolP256r1GPGKeyString(t *testing.T) { + testGPGArmor := `-----BEGIN PGP PUBLIC KEY BLOCK----- +Version: GnuPG v2 + +mFMEV6HwkhMJKyQDAwIIAQEHAgMEUsvJO/j5dFMRRj67qeZC9fSKBsGZdOHRj2+6 +8wssmbUuLTfT/ZjIbExETyY8hFnURRGpD2Ifyz0cKjXcbXfJtrQTRm9vYmFyIDxm +b29AYmFyLmRlPoh/BBMTCAAnBQJZOsDIAhsDBQkJZgGABQsJCAcCBhUICQoLAgQW +AgMBAh4BAheAAAoJEGuJTd/DBMzmNVQA/2beUrv1yU4gyvCiPDEm3pK42cSfaL5D +muCtPCUg9hlWAP4yq6M78NW8STfsXgn6oeziMYiHSTmV14nOamLuwwDWM7hXBFeh +8JISCSskAwMCCAEBBwIDBG3A+XfINAZp1CTse2mRNgeUE5DbUtEpO8ALXKA1UQsQ +DLKq27b7zTgawgXIGUGP6mWsJ5oH7MNAJ/uKTsYmX40DAQgHiGcEGBMIAA8FAleh +8JICGwwFCQlmAYAACgkQa4lN38MEzOZwKAD/QKyerAgcvzzLaqvtap3XvpYcw9tc +OyjLLnFQiVmq7kEA/0z0CQe3ZQiQIq5zrs7Nh1XRkFAo8GlU/SGC9XFFi722 +=ZiSe +-----END PGP PUBLIC KEY BLOCK-----` + + key, err := checkArmoredGPGKeyString(testGPGArmor) + assert.NoError(t, err, "Could not parse a valid GPG public armored brainpoolP256r1 key", key) //TODO verify value of key } @@ -79,11 +100,11 @@ MkM/fdpyc2hY7Dl/+qFmN5MG5yGmMpQcX+RNNR222ibNC1D3wg== =i9b7 -----END PGP PUBLIC KEY BLOCK-----` ekey, err := checkArmoredGPGKeyString(testGPGArmor) - assert.Nil(t, err, "Could not parse a valid GPG armored key", ekey) + assert.NoError(t, err, "Could not parse a valid GPG armored key", ekey) pubkey := ekey.PrimaryKey content, err := base64EncPubKey(pubkey) - assert.Nil(t, err, "Could not base64 encode a valid PublicKey content", ekey) + assert.NoError(t, err, "Could not base64 encode a valid PublicKey content", ekey) key := &GPGKey{ KeyID: pubkey.KeyIdString(), @@ -144,21 +165,21 @@ Unknown GPG key with good email ` //Reading Sign goodSig, err := extractSignature(testGoodSigArmor) - assert.Nil(t, err, "Could not parse a valid GPG armored signature", testGoodSigArmor) + assert.NoError(t, err, "Could not parse a valid GPG armored signature", testGoodSigArmor) badSig, err := extractSignature(testBadSigArmor) - assert.Nil(t, err, "Could not parse a valid GPG armored signature", testBadSigArmor) + assert.NoError(t, err, "Could not parse a valid GPG armored signature", testBadSigArmor) //Generating hash of commit goodHash, err := populateHash(goodSig.Hash, []byte(testGoodPayload)) - assert.Nil(t, err, "Could not generate a valid hash of payload", testGoodPayload) + assert.NoError(t, err, "Could not generate a valid hash of payload", testGoodPayload) badHash, err := populateHash(badSig.Hash, []byte(testBadPayload)) - assert.Nil(t, err, "Could not generate a valid hash of payload", testBadPayload) + assert.NoError(t, err, "Could not generate a valid hash of payload", testBadPayload) //Verify err = verifySign(goodSig, goodHash, key) - assert.Nil(t, err, "Could not validate a good signature") + assert.NoError(t, err, "Could not validate a good signature") err = verifySign(badSig, badHash, key) - assert.NotNil(t, err, "Validate a bad signature") + assert.Error(t, err, "Validate a bad signature") err = verifySign(goodSig, goodHash, cannotsignkey) - assert.NotNil(t, err, "Validate a bad signature with a kay that can not sign") + assert.Error(t, err, "Validate a bad signature with a kay that can not sign") } diff --git a/vendor/github.com/keybase/go-crypto/LICENSE b/vendor/github.com/keybase/go-crypto/LICENSE new file mode 100644 index 000000000..6a66aea5e --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2009 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/github.com/keybase/go-crypto/PATENTS b/vendor/github.com/keybase/go-crypto/PATENTS new file mode 100644 index 000000000..733099041 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/PATENTS @@ -0,0 +1,22 @@ +Additional IP Rights Grant (Patents) + +"This implementation" means the copyrightable works distributed by +Google as part of the Go project. + +Google hereby grants to You a perpetual, worldwide, non-exclusive, +no-charge, royalty-free, irrevocable (except as stated in this section) +patent license to make, have made, use, offer to sell, sell, import, +transfer and otherwise run, modify and propagate the contents of this +implementation of Go, where such license applies only to those patent +claims, both currently owned or controlled by Google and acquired in +the future, licensable by Google that are necessarily infringed by this +implementation of Go. This grant does not include claims that would be +infringed only as a consequence of further modification of this +implementation. If you or your agent or exclusive licensee institute or +order or agree to the institution of patent litigation against any +entity (including a cross-claim or counterclaim in a lawsuit) alleging +that this implementation of Go or any code incorporated within this +implementation of Go constitutes direct or contributory patent +infringement, or inducement of patent infringement, then any patent +rights granted to you under this License for this implementation of Go +shall terminate as of the date such litigation is filed. diff --git a/vendor/github.com/keybase/go-crypto/brainpool/brainpool.go b/vendor/github.com/keybase/go-crypto/brainpool/brainpool.go new file mode 100644 index 000000000..77fb8b9a0 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/brainpool/brainpool.go @@ -0,0 +1,134 @@ +// Package brainpool implements Brainpool elliptic curves. +// Implementation of rcurves is from github.com/ebfe/brainpool +// Note that these curves are implemented with naive, non-constant time operations +// and are likely not suitable for enviroments where timing attacks are a concern. +package brainpool + +import ( + "crypto/elliptic" + "math/big" + "sync" +) + +var ( + once sync.Once + p256t1, p384t1, p512t1 *elliptic.CurveParams + p256r1, p384r1, p512r1 *rcurve +) + +func initAll() { + initP256t1() + initP384t1() + initP512t1() + initP256r1() + initP384r1() + initP512r1() +} + +func initP256t1() { + p256t1 = &elliptic.CurveParams{Name: "brainpoolP256t1"} + p256t1.P, _ = new(big.Int).SetString("A9FB57DBA1EEA9BC3E660A909D838D726E3BF623D52620282013481D1F6E5377", 16) + p256t1.N, _ = new(big.Int).SetString("A9FB57DBA1EEA9BC3E660A909D838D718C397AA3B561A6F7901E0E82974856A7", 16) + p256t1.B, _ = new(big.Int).SetString("662C61C430D84EA4FE66A7733D0B76B7BF93EBC4AF2F49256AE58101FEE92B04", 16) + p256t1.Gx, _ = new(big.Int).SetString("A3E8EB3CC1CFE7B7732213B23A656149AFA142C47AAFBC2B79A191562E1305F4", 16) + p256t1.Gy, _ = new(big.Int).SetString("2D996C823439C56D7F7B22E14644417E69BCB6DE39D027001DABE8F35B25C9BE", 16) + p256t1.BitSize = 256 +} + +func initP256r1() { + twisted := p256t1 + params := &elliptic.CurveParams{ + Name: "brainpoolP256r1", + P: twisted.P, + N: twisted.N, + BitSize: twisted.BitSize, + } + params.Gx, _ = new(big.Int).SetString("8BD2AEB9CB7E57CB2C4B482FFC81B7AFB9DE27E1E3BD23C23A4453BD9ACE3262", 16) + params.Gy, _ = new(big.Int).SetString("547EF835C3DAC4FD97F8461A14611DC9C27745132DED8E545C1D54C72F046997", 16) + z, _ := new(big.Int).SetString("3E2D4BD9597B58639AE7AA669CAB9837CF5CF20A2C852D10F655668DFC150EF0", 16) + p256r1 = newrcurve(twisted, params, z) +} + +func initP384t1() { + p384t1 = &elliptic.CurveParams{Name: "brainpoolP384t1"} + p384t1.P, _ = new(big.Int).SetString("8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B412B1DA197FB71123ACD3A729901D1A71874700133107EC53", 16) + p384t1.N, _ = new(big.Int).SetString("8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B31F166E6CAC0425A7CF3AB6AF6B7FC3103B883202E9046565", 16) + p384t1.B, _ = new(big.Int).SetString("7F519EADA7BDA81BD826DBA647910F8C4B9346ED8CCDC64E4B1ABD11756DCE1D2074AA263B88805CED70355A33B471EE", 16) + p384t1.Gx, _ = new(big.Int).SetString("18DE98B02DB9A306F2AFCD7235F72A819B80AB12EBD653172476FECD462AABFFC4FF191B946A5F54D8D0AA2F418808CC", 16) + p384t1.Gy, _ = new(big.Int).SetString("25AB056962D30651A114AFD2755AD336747F93475B7A1FCA3B88F2B6A208CCFE469408584DC2B2912675BF5B9E582928", 16) + p384t1.BitSize = 384 +} + +func initP384r1() { + twisted := p384t1 + params := &elliptic.CurveParams{ + Name: "brainpoolP384r1", + P: twisted.P, + N: twisted.N, + BitSize: twisted.BitSize, + } + params.Gx, _ = new(big.Int).SetString("1D1C64F068CF45FFA2A63A81B7C13F6B8847A3E77EF14FE3DB7FCAFE0CBD10E8E826E03436D646AAEF87B2E247D4AF1E", 16) + params.Gy, _ = new(big.Int).SetString("8ABE1D7520F9C2A45CB1EB8E95CFD55262B70B29FEEC5864E19C054FF99129280E4646217791811142820341263C5315", 16) + z, _ := new(big.Int).SetString("41DFE8DD399331F7166A66076734A89CD0D2BCDB7D068E44E1F378F41ECBAE97D2D63DBC87BCCDDCCC5DA39E8589291C", 16) + p384r1 = newrcurve(twisted, params, z) +} + +func initP512t1() { + p512t1 = &elliptic.CurveParams{Name: "brainpoolP512t1"} + p512t1.P, _ = new(big.Int).SetString("AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA703308717D4D9B009BC66842AECDA12AE6A380E62881FF2F2D82C68528AA6056583A48F3", 16) + p512t1.N, _ = new(big.Int).SetString("AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA70330870553E5C414CA92619418661197FAC10471DB1D381085DDADDB58796829CA90069", 16) + p512t1.B, _ = new(big.Int).SetString("7CBBBCF9441CFAB76E1890E46884EAE321F70C0BCB4981527897504BEC3E36A62BCDFA2304976540F6450085F2DAE145C22553B465763689180EA2571867423E", 16) + p512t1.Gx, _ = new(big.Int).SetString("640ECE5C12788717B9C1BA06CBC2A6FEBA85842458C56DDE9DB1758D39C0313D82BA51735CDB3EA499AA77A7D6943A64F7A3F25FE26F06B51BAA2696FA9035DA", 16) + p512t1.Gy, _ = new(big.Int).SetString("5B534BD595F5AF0FA2C892376C84ACE1BB4E3019B71634C01131159CAE03CEE9D9932184BEEF216BD71DF2DADF86A627306ECFF96DBB8BACE198B61E00F8B332", 16) + p512t1.BitSize = 512 +} + +func initP512r1() { + twisted := p512t1 + params := &elliptic.CurveParams{ + Name: "brainpoolP512r1", + P: twisted.P, + N: twisted.N, + BitSize: twisted.BitSize, + } + params.Gx, _ = new(big.Int).SetString("81AEE4BDD82ED9645A21322E9C4C6A9385ED9F70B5D916C1B43B62EEF4D0098EFF3B1F78E2D0D48D50D1687B93B97D5F7C6D5047406A5E688B352209BCB9F822", 16) + params.Gy, _ = new(big.Int).SetString("7DDE385D566332ECC0EABFA9CF7822FDF209F70024A57B1AA000C55B881F8111B2DCDE494A5F485E5BCA4BD88A2763AED1CA2B2FA8F0540678CD1E0F3AD80892", 16) + z, _ := new(big.Int).SetString("12EE58E6764838B69782136F0F2D3BA06E27695716054092E60A80BEDB212B64E585D90BCE13761F85C3F1D2A64E3BE8FEA2220F01EBA5EEB0F35DBD29D922AB", 16) + p512r1 = newrcurve(twisted, params, z) +} + +// P256t1 returns a Curve which implements Brainpool P256t1 (see RFC 5639, section 3.4) +func P256t1() elliptic.Curve { + once.Do(initAll) + return p256t1 +} + +// P256r1 returns a Curve which implements Brainpool P256r1 (see RFC 5639, section 3.4) +func P256r1() elliptic.Curve { + once.Do(initAll) + return p256r1 +} + +// P384t1 returns a Curve which implements Brainpool P384t1 (see RFC 5639, section 3.6) +func P384t1() elliptic.Curve { + once.Do(initAll) + return p384t1 +} + +// P384r1 returns a Curve which implements Brainpool P384r1 (see RFC 5639, section 3.6) +func P384r1() elliptic.Curve { + once.Do(initAll) + return p384r1 +} + +// P512t1 returns a Curve which implements Brainpool P512t1 (see RFC 5639, section 3.7) +func P512t1() elliptic.Curve { + once.Do(initAll) + return p512t1 +} + +// P512r1 returns a Curve which implements Brainpool P512r1 (see RFC 5639, section 3.7) +func P512r1() elliptic.Curve { + once.Do(initAll) + return p512r1 +} diff --git a/vendor/github.com/keybase/go-crypto/brainpool/rcurve.go b/vendor/github.com/keybase/go-crypto/brainpool/rcurve.go new file mode 100644 index 000000000..7e291d6aa --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/brainpool/rcurve.go @@ -0,0 +1,83 @@ +package brainpool + +import ( + "crypto/elliptic" + "math/big" +) + +var _ elliptic.Curve = (*rcurve)(nil) + +type rcurve struct { + twisted elliptic.Curve + params *elliptic.CurveParams + z *big.Int + zinv *big.Int + z2 *big.Int + z3 *big.Int + zinv2 *big.Int + zinv3 *big.Int +} + +var ( + two = big.NewInt(2) + three = big.NewInt(3) +) + +func newrcurve(twisted elliptic.Curve, params *elliptic.CurveParams, z *big.Int) *rcurve { + zinv := new(big.Int).ModInverse(z, params.P) + return &rcurve{ + twisted: twisted, + params: params, + z: z, + zinv: zinv, + z2: new(big.Int).Exp(z, two, params.P), + z3: new(big.Int).Exp(z, three, params.P), + zinv2: new(big.Int).Exp(zinv, two, params.P), + zinv3: new(big.Int).Exp(zinv, three, params.P), + } +} + +func (curve *rcurve) toTwisted(x, y *big.Int) (*big.Int, *big.Int) { + var tx, ty big.Int + tx.Mul(x, curve.z2) + tx.Mod(&tx, curve.params.P) + ty.Mul(y, curve.z3) + ty.Mod(&ty, curve.params.P) + return &tx, &ty +} + +func (curve *rcurve) fromTwisted(tx, ty *big.Int) (*big.Int, *big.Int) { + var x, y big.Int + x.Mul(tx, curve.zinv2) + x.Mod(&x, curve.params.P) + y.Mul(ty, curve.zinv3) + y.Mod(&y, curve.params.P) + return &x, &y +} + +func (curve *rcurve) Params() *elliptic.CurveParams { + return curve.params +} + +func (curve *rcurve) IsOnCurve(x, y *big.Int) bool { + return curve.twisted.IsOnCurve(curve.toTwisted(x, y)) +} + +func (curve *rcurve) Add(x1, y1, x2, y2 *big.Int) (x, y *big.Int) { + tx1, ty1 := curve.toTwisted(x1, y1) + tx2, ty2 := curve.toTwisted(x2, y2) + return curve.fromTwisted(curve.twisted.Add(tx1, ty1, tx2, ty2)) +} + +func (curve *rcurve) Double(x1, y1 *big.Int) (x, y *big.Int) { + return curve.fromTwisted(curve.twisted.Double(curve.toTwisted(x1, y1))) +} + +func (curve *rcurve) ScalarMult(x1, y1 *big.Int, scalar []byte) (x, y *big.Int) { + tx1, ty1 := curve.toTwisted(x1, y1) + return curve.fromTwisted(curve.twisted.ScalarMult(tx1, ty1, scalar)) +} + +func (curve *rcurve) ScalarBaseMult(scalar []byte) (x, y *big.Int) { + return curve.fromTwisted(curve.twisted.ScalarBaseMult(scalar)) +} diff --git a/vendor/golang.org/x/crypto/cast5/cast5.go b/vendor/github.com/keybase/go-crypto/cast5/cast5.go similarity index 99% rename from vendor/golang.org/x/crypto/cast5/cast5.go rename to vendor/github.com/keybase/go-crypto/cast5/cast5.go index 0b4af37bd..8c1b299bf 100644 --- a/vendor/golang.org/x/crypto/cast5/cast5.go +++ b/vendor/github.com/keybase/go-crypto/cast5/cast5.go @@ -4,7 +4,7 @@ // Package cast5 implements CAST5, as defined in RFC 2144. CAST5 is a common // OpenPGP cipher. -package cast5 // import "golang.org/x/crypto/cast5" +package cast5 import "errors" diff --git a/vendor/github.com/keybase/go-crypto/curve25519/const_amd64.s b/vendor/github.com/keybase/go-crypto/curve25519/const_amd64.s new file mode 100644 index 000000000..797f9b051 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/const_amd64.s @@ -0,0 +1,20 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This code was translated into a form compatible with 6a from the public +// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html + +// +build amd64,!gccgo,!appengine + +DATA ·REDMASK51(SB)/8, $0x0007FFFFFFFFFFFF +GLOBL ·REDMASK51(SB), 8, $8 + +DATA ·_121666_213(SB)/8, $996687872 +GLOBL ·_121666_213(SB), 8, $8 + +DATA ·_2P0(SB)/8, $0xFFFFFFFFFFFDA +GLOBL ·_2P0(SB), 8, $8 + +DATA ·_2P1234(SB)/8, $0xFFFFFFFFFFFFE +GLOBL ·_2P1234(SB), 8, $8 diff --git a/vendor/github.com/keybase/go-crypto/curve25519/cswap_amd64.s b/vendor/github.com/keybase/go-crypto/curve25519/cswap_amd64.s new file mode 100644 index 000000000..45484d1b5 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/cswap_amd64.s @@ -0,0 +1,88 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This code was translated into a form compatible with 6a from the public +// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html + +// +build amd64,!gccgo,!appengine + +// func cswap(inout *[5]uint64, v uint64) +TEXT ·cswap(SB),7,$0 + MOVQ inout+0(FP),DI + MOVQ v+8(FP),SI + + CMPQ SI,$1 + MOVQ 0(DI),SI + MOVQ 80(DI),DX + MOVQ 8(DI),CX + MOVQ 88(DI),R8 + MOVQ SI,R9 + CMOVQEQ DX,SI + CMOVQEQ R9,DX + MOVQ CX,R9 + CMOVQEQ R8,CX + CMOVQEQ R9,R8 + MOVQ SI,0(DI) + MOVQ DX,80(DI) + MOVQ CX,8(DI) + MOVQ R8,88(DI) + MOVQ 16(DI),SI + MOVQ 96(DI),DX + MOVQ 24(DI),CX + MOVQ 104(DI),R8 + MOVQ SI,R9 + CMOVQEQ DX,SI + CMOVQEQ R9,DX + MOVQ CX,R9 + CMOVQEQ R8,CX + CMOVQEQ R9,R8 + MOVQ SI,16(DI) + MOVQ DX,96(DI) + MOVQ CX,24(DI) + MOVQ R8,104(DI) + MOVQ 32(DI),SI + MOVQ 112(DI),DX + MOVQ 40(DI),CX + MOVQ 120(DI),R8 + MOVQ SI,R9 + CMOVQEQ DX,SI + CMOVQEQ R9,DX + MOVQ CX,R9 + CMOVQEQ R8,CX + CMOVQEQ R9,R8 + MOVQ SI,32(DI) + MOVQ DX,112(DI) + MOVQ CX,40(DI) + MOVQ R8,120(DI) + MOVQ 48(DI),SI + MOVQ 128(DI),DX + MOVQ 56(DI),CX + MOVQ 136(DI),R8 + MOVQ SI,R9 + CMOVQEQ DX,SI + CMOVQEQ R9,DX + MOVQ CX,R9 + CMOVQEQ R8,CX + CMOVQEQ R9,R8 + MOVQ SI,48(DI) + MOVQ DX,128(DI) + MOVQ CX,56(DI) + MOVQ R8,136(DI) + MOVQ 64(DI),SI + MOVQ 144(DI),DX + MOVQ 72(DI),CX + MOVQ 152(DI),R8 + MOVQ SI,R9 + CMOVQEQ DX,SI + CMOVQEQ R9,DX + MOVQ CX,R9 + CMOVQEQ R8,CX + CMOVQEQ R9,R8 + MOVQ SI,64(DI) + MOVQ DX,144(DI) + MOVQ CX,72(DI) + MOVQ R8,152(DI) + MOVQ DI,AX + MOVQ SI,DX + RET diff --git a/vendor/github.com/keybase/go-crypto/curve25519/curve25519.go b/vendor/github.com/keybase/go-crypto/curve25519/curve25519.go new file mode 100644 index 000000000..6918c47fc --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/curve25519.go @@ -0,0 +1,841 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// We have a implementation in amd64 assembly so this code is only run on +// non-amd64 platforms. The amd64 assembly does not support gccgo. +// +build !amd64 gccgo appengine + +package curve25519 + +// This code is a port of the public domain, "ref10" implementation of +// curve25519 from SUPERCOP 20130419 by D. J. Bernstein. + +// fieldElement represents an element of the field GF(2^255 - 19). An element +// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77 +// t[3]+2^102 t[4]+...+2^230 t[9]. Bounds on each t[i] vary depending on +// context. +type fieldElement [10]int32 + +func feZero(fe *fieldElement) { + for i := range fe { + fe[i] = 0 + } +} + +func feOne(fe *fieldElement) { + feZero(fe) + fe[0] = 1 +} + +func feAdd(dst, a, b *fieldElement) { + for i := range dst { + dst[i] = a[i] + b[i] + } +} + +func feSub(dst, a, b *fieldElement) { + for i := range dst { + dst[i] = a[i] - b[i] + } +} + +func feCopy(dst, src *fieldElement) { + for i := range dst { + dst[i] = src[i] + } +} + +// feCSwap replaces (f,g) with (g,f) if b == 1; replaces (f,g) with (f,g) if b == 0. +// +// Preconditions: b in {0,1}. +func feCSwap(f, g *fieldElement, b int32) { + var x fieldElement + b = -b + for i := range x { + x[i] = b & (f[i] ^ g[i]) + } + + for i := range f { + f[i] ^= x[i] + } + for i := range g { + g[i] ^= x[i] + } +} + +// load3 reads a 24-bit, little-endian value from in. +func load3(in []byte) int64 { + var r int64 + r = int64(in[0]) + r |= int64(in[1]) << 8 + r |= int64(in[2]) << 16 + return r +} + +// load4 reads a 32-bit, little-endian value from in. +func load4(in []byte) int64 { + var r int64 + r = int64(in[0]) + r |= int64(in[1]) << 8 + r |= int64(in[2]) << 16 + r |= int64(in[3]) << 24 + return r +} + +func feFromBytes(dst *fieldElement, src *[32]byte) { + h0 := load4(src[:]) + h1 := load3(src[4:]) << 6 + h2 := load3(src[7:]) << 5 + h3 := load3(src[10:]) << 3 + h4 := load3(src[13:]) << 2 + h5 := load4(src[16:]) + h6 := load3(src[20:]) << 7 + h7 := load3(src[23:]) << 5 + h8 := load3(src[26:]) << 4 + h9 := load3(src[29:]) << 2 + + var carry [10]int64 + carry[9] = (h9 + 1<<24) >> 25 + h0 += carry[9] * 19 + h9 -= carry[9] << 25 + carry[1] = (h1 + 1<<24) >> 25 + h2 += carry[1] + h1 -= carry[1] << 25 + carry[3] = (h3 + 1<<24) >> 25 + h4 += carry[3] + h3 -= carry[3] << 25 + carry[5] = (h5 + 1<<24) >> 25 + h6 += carry[5] + h5 -= carry[5] << 25 + carry[7] = (h7 + 1<<24) >> 25 + h8 += carry[7] + h7 -= carry[7] << 25 + + carry[0] = (h0 + 1<<25) >> 26 + h1 += carry[0] + h0 -= carry[0] << 26 + carry[2] = (h2 + 1<<25) >> 26 + h3 += carry[2] + h2 -= carry[2] << 26 + carry[4] = (h4 + 1<<25) >> 26 + h5 += carry[4] + h4 -= carry[4] << 26 + carry[6] = (h6 + 1<<25) >> 26 + h7 += carry[6] + h6 -= carry[6] << 26 + carry[8] = (h8 + 1<<25) >> 26 + h9 += carry[8] + h8 -= carry[8] << 26 + + dst[0] = int32(h0) + dst[1] = int32(h1) + dst[2] = int32(h2) + dst[3] = int32(h3) + dst[4] = int32(h4) + dst[5] = int32(h5) + dst[6] = int32(h6) + dst[7] = int32(h7) + dst[8] = int32(h8) + dst[9] = int32(h9) +} + +// feToBytes marshals h to s. +// Preconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +// +// Write p=2^255-19; q=floor(h/p). +// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))). +// +// Proof: +// Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4. +// Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4. +// +// Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9). +// Then 0> 25 + q = (h[0] + q) >> 26 + q = (h[1] + q) >> 25 + q = (h[2] + q) >> 26 + q = (h[3] + q) >> 25 + q = (h[4] + q) >> 26 + q = (h[5] + q) >> 25 + q = (h[6] + q) >> 26 + q = (h[7] + q) >> 25 + q = (h[8] + q) >> 26 + q = (h[9] + q) >> 25 + + // Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20. + h[0] += 19 * q + // Goal: Output h-2^255 q, which is between 0 and 2^255-20. + + carry[0] = h[0] >> 26 + h[1] += carry[0] + h[0] -= carry[0] << 26 + carry[1] = h[1] >> 25 + h[2] += carry[1] + h[1] -= carry[1] << 25 + carry[2] = h[2] >> 26 + h[3] += carry[2] + h[2] -= carry[2] << 26 + carry[3] = h[3] >> 25 + h[4] += carry[3] + h[3] -= carry[3] << 25 + carry[4] = h[4] >> 26 + h[5] += carry[4] + h[4] -= carry[4] << 26 + carry[5] = h[5] >> 25 + h[6] += carry[5] + h[5] -= carry[5] << 25 + carry[6] = h[6] >> 26 + h[7] += carry[6] + h[6] -= carry[6] << 26 + carry[7] = h[7] >> 25 + h[8] += carry[7] + h[7] -= carry[7] << 25 + carry[8] = h[8] >> 26 + h[9] += carry[8] + h[8] -= carry[8] << 26 + carry[9] = h[9] >> 25 + h[9] -= carry[9] << 25 + // h10 = carry9 + + // Goal: Output h[0]+...+2^255 h10-2^255 q, which is between 0 and 2^255-20. + // Have h[0]+...+2^230 h[9] between 0 and 2^255-1; + // evidently 2^255 h10-2^255 q = 0. + // Goal: Output h[0]+...+2^230 h[9]. + + s[0] = byte(h[0] >> 0) + s[1] = byte(h[0] >> 8) + s[2] = byte(h[0] >> 16) + s[3] = byte((h[0] >> 24) | (h[1] << 2)) + s[4] = byte(h[1] >> 6) + s[5] = byte(h[1] >> 14) + s[6] = byte((h[1] >> 22) | (h[2] << 3)) + s[7] = byte(h[2] >> 5) + s[8] = byte(h[2] >> 13) + s[9] = byte((h[2] >> 21) | (h[3] << 5)) + s[10] = byte(h[3] >> 3) + s[11] = byte(h[3] >> 11) + s[12] = byte((h[3] >> 19) | (h[4] << 6)) + s[13] = byte(h[4] >> 2) + s[14] = byte(h[4] >> 10) + s[15] = byte(h[4] >> 18) + s[16] = byte(h[5] >> 0) + s[17] = byte(h[5] >> 8) + s[18] = byte(h[5] >> 16) + s[19] = byte((h[5] >> 24) | (h[6] << 1)) + s[20] = byte(h[6] >> 7) + s[21] = byte(h[6] >> 15) + s[22] = byte((h[6] >> 23) | (h[7] << 3)) + s[23] = byte(h[7] >> 5) + s[24] = byte(h[7] >> 13) + s[25] = byte((h[7] >> 21) | (h[8] << 4)) + s[26] = byte(h[8] >> 4) + s[27] = byte(h[8] >> 12) + s[28] = byte((h[8] >> 20) | (h[9] << 6)) + s[29] = byte(h[9] >> 2) + s[30] = byte(h[9] >> 10) + s[31] = byte(h[9] >> 18) +} + +// feMul calculates h = f * g +// Can overlap h with f or g. +// +// Preconditions: +// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +// |g| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +// +// Postconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +// +// Notes on implementation strategy: +// +// Using schoolbook multiplication. +// Karatsuba would save a little in some cost models. +// +// Most multiplications by 2 and 19 are 32-bit precomputations; +// cheaper than 64-bit postcomputations. +// +// There is one remaining multiplication by 19 in the carry chain; +// one *19 precomputation can be merged into this, +// but the resulting data flow is considerably less clean. +// +// There are 12 carries below. +// 10 of them are 2-way parallelizable and vectorizable. +// Can get away with 11 carries, but then data flow is much deeper. +// +// With tighter constraints on inputs can squeeze carries into int32. +func feMul(h, f, g *fieldElement) { + f0 := f[0] + f1 := f[1] + f2 := f[2] + f3 := f[3] + f4 := f[4] + f5 := f[5] + f6 := f[6] + f7 := f[7] + f8 := f[8] + f9 := f[9] + g0 := g[0] + g1 := g[1] + g2 := g[2] + g3 := g[3] + g4 := g[4] + g5 := g[5] + g6 := g[6] + g7 := g[7] + g8 := g[8] + g9 := g[9] + g1_19 := 19 * g1 // 1.4*2^29 + g2_19 := 19 * g2 // 1.4*2^30; still ok + g3_19 := 19 * g3 + g4_19 := 19 * g4 + g5_19 := 19 * g5 + g6_19 := 19 * g6 + g7_19 := 19 * g7 + g8_19 := 19 * g8 + g9_19 := 19 * g9 + f1_2 := 2 * f1 + f3_2 := 2 * f3 + f5_2 := 2 * f5 + f7_2 := 2 * f7 + f9_2 := 2 * f9 + f0g0 := int64(f0) * int64(g0) + f0g1 := int64(f0) * int64(g1) + f0g2 := int64(f0) * int64(g2) + f0g3 := int64(f0) * int64(g3) + f0g4 := int64(f0) * int64(g4) + f0g5 := int64(f0) * int64(g5) + f0g6 := int64(f0) * int64(g6) + f0g7 := int64(f0) * int64(g7) + f0g8 := int64(f0) * int64(g8) + f0g9 := int64(f0) * int64(g9) + f1g0 := int64(f1) * int64(g0) + f1g1_2 := int64(f1_2) * int64(g1) + f1g2 := int64(f1) * int64(g2) + f1g3_2 := int64(f1_2) * int64(g3) + f1g4 := int64(f1) * int64(g4) + f1g5_2 := int64(f1_2) * int64(g5) + f1g6 := int64(f1) * int64(g6) + f1g7_2 := int64(f1_2) * int64(g7) + f1g8 := int64(f1) * int64(g8) + f1g9_38 := int64(f1_2) * int64(g9_19) + f2g0 := int64(f2) * int64(g0) + f2g1 := int64(f2) * int64(g1) + f2g2 := int64(f2) * int64(g2) + f2g3 := int64(f2) * int64(g3) + f2g4 := int64(f2) * int64(g4) + f2g5 := int64(f2) * int64(g5) + f2g6 := int64(f2) * int64(g6) + f2g7 := int64(f2) * int64(g7) + f2g8_19 := int64(f2) * int64(g8_19) + f2g9_19 := int64(f2) * int64(g9_19) + f3g0 := int64(f3) * int64(g0) + f3g1_2 := int64(f3_2) * int64(g1) + f3g2 := int64(f3) * int64(g2) + f3g3_2 := int64(f3_2) * int64(g3) + f3g4 := int64(f3) * int64(g4) + f3g5_2 := int64(f3_2) * int64(g5) + f3g6 := int64(f3) * int64(g6) + f3g7_38 := int64(f3_2) * int64(g7_19) + f3g8_19 := int64(f3) * int64(g8_19) + f3g9_38 := int64(f3_2) * int64(g9_19) + f4g0 := int64(f4) * int64(g0) + f4g1 := int64(f4) * int64(g1) + f4g2 := int64(f4) * int64(g2) + f4g3 := int64(f4) * int64(g3) + f4g4 := int64(f4) * int64(g4) + f4g5 := int64(f4) * int64(g5) + f4g6_19 := int64(f4) * int64(g6_19) + f4g7_19 := int64(f4) * int64(g7_19) + f4g8_19 := int64(f4) * int64(g8_19) + f4g9_19 := int64(f4) * int64(g9_19) + f5g0 := int64(f5) * int64(g0) + f5g1_2 := int64(f5_2) * int64(g1) + f5g2 := int64(f5) * int64(g2) + f5g3_2 := int64(f5_2) * int64(g3) + f5g4 := int64(f5) * int64(g4) + f5g5_38 := int64(f5_2) * int64(g5_19) + f5g6_19 := int64(f5) * int64(g6_19) + f5g7_38 := int64(f5_2) * int64(g7_19) + f5g8_19 := int64(f5) * int64(g8_19) + f5g9_38 := int64(f5_2) * int64(g9_19) + f6g0 := int64(f6) * int64(g0) + f6g1 := int64(f6) * int64(g1) + f6g2 := int64(f6) * int64(g2) + f6g3 := int64(f6) * int64(g3) + f6g4_19 := int64(f6) * int64(g4_19) + f6g5_19 := int64(f6) * int64(g5_19) + f6g6_19 := int64(f6) * int64(g6_19) + f6g7_19 := int64(f6) * int64(g7_19) + f6g8_19 := int64(f6) * int64(g8_19) + f6g9_19 := int64(f6) * int64(g9_19) + f7g0 := int64(f7) * int64(g0) + f7g1_2 := int64(f7_2) * int64(g1) + f7g2 := int64(f7) * int64(g2) + f7g3_38 := int64(f7_2) * int64(g3_19) + f7g4_19 := int64(f7) * int64(g4_19) + f7g5_38 := int64(f7_2) * int64(g5_19) + f7g6_19 := int64(f7) * int64(g6_19) + f7g7_38 := int64(f7_2) * int64(g7_19) + f7g8_19 := int64(f7) * int64(g8_19) + f7g9_38 := int64(f7_2) * int64(g9_19) + f8g0 := int64(f8) * int64(g0) + f8g1 := int64(f8) * int64(g1) + f8g2_19 := int64(f8) * int64(g2_19) + f8g3_19 := int64(f8) * int64(g3_19) + f8g4_19 := int64(f8) * int64(g4_19) + f8g5_19 := int64(f8) * int64(g5_19) + f8g6_19 := int64(f8) * int64(g6_19) + f8g7_19 := int64(f8) * int64(g7_19) + f8g8_19 := int64(f8) * int64(g8_19) + f8g9_19 := int64(f8) * int64(g9_19) + f9g0 := int64(f9) * int64(g0) + f9g1_38 := int64(f9_2) * int64(g1_19) + f9g2_19 := int64(f9) * int64(g2_19) + f9g3_38 := int64(f9_2) * int64(g3_19) + f9g4_19 := int64(f9) * int64(g4_19) + f9g5_38 := int64(f9_2) * int64(g5_19) + f9g6_19 := int64(f9) * int64(g6_19) + f9g7_38 := int64(f9_2) * int64(g7_19) + f9g8_19 := int64(f9) * int64(g8_19) + f9g9_38 := int64(f9_2) * int64(g9_19) + h0 := f0g0 + f1g9_38 + f2g8_19 + f3g7_38 + f4g6_19 + f5g5_38 + f6g4_19 + f7g3_38 + f8g2_19 + f9g1_38 + h1 := f0g1 + f1g0 + f2g9_19 + f3g8_19 + f4g7_19 + f5g6_19 + f6g5_19 + f7g4_19 + f8g3_19 + f9g2_19 + h2 := f0g2 + f1g1_2 + f2g0 + f3g9_38 + f4g8_19 + f5g7_38 + f6g6_19 + f7g5_38 + f8g4_19 + f9g3_38 + h3 := f0g3 + f1g2 + f2g1 + f3g0 + f4g9_19 + f5g8_19 + f6g7_19 + f7g6_19 + f8g5_19 + f9g4_19 + h4 := f0g4 + f1g3_2 + f2g2 + f3g1_2 + f4g0 + f5g9_38 + f6g8_19 + f7g7_38 + f8g6_19 + f9g5_38 + h5 := f0g5 + f1g4 + f2g3 + f3g2 + f4g1 + f5g0 + f6g9_19 + f7g8_19 + f8g7_19 + f9g6_19 + h6 := f0g6 + f1g5_2 + f2g4 + f3g3_2 + f4g2 + f5g1_2 + f6g0 + f7g9_38 + f8g8_19 + f9g7_38 + h7 := f0g7 + f1g6 + f2g5 + f3g4 + f4g3 + f5g2 + f6g1 + f7g0 + f8g9_19 + f9g8_19 + h8 := f0g8 + f1g7_2 + f2g6 + f3g5_2 + f4g4 + f5g3_2 + f6g2 + f7g1_2 + f8g0 + f9g9_38 + h9 := f0g9 + f1g8 + f2g7 + f3g6 + f4g5 + f5g4 + f6g3 + f7g2 + f8g1 + f9g0 + var carry [10]int64 + + // |h0| <= (1.1*1.1*2^52*(1+19+19+19+19)+1.1*1.1*2^50*(38+38+38+38+38)) + // i.e. |h0| <= 1.2*2^59; narrower ranges for h2, h4, h6, h8 + // |h1| <= (1.1*1.1*2^51*(1+1+19+19+19+19+19+19+19+19)) + // i.e. |h1| <= 1.5*2^58; narrower ranges for h3, h5, h7, h9 + + carry[0] = (h0 + (1 << 25)) >> 26 + h1 += carry[0] + h0 -= carry[0] << 26 + carry[4] = (h4 + (1 << 25)) >> 26 + h5 += carry[4] + h4 -= carry[4] << 26 + // |h0| <= 2^25 + // |h4| <= 2^25 + // |h1| <= 1.51*2^58 + // |h5| <= 1.51*2^58 + + carry[1] = (h1 + (1 << 24)) >> 25 + h2 += carry[1] + h1 -= carry[1] << 25 + carry[5] = (h5 + (1 << 24)) >> 25 + h6 += carry[5] + h5 -= carry[5] << 25 + // |h1| <= 2^24; from now on fits into int32 + // |h5| <= 2^24; from now on fits into int32 + // |h2| <= 1.21*2^59 + // |h6| <= 1.21*2^59 + + carry[2] = (h2 + (1 << 25)) >> 26 + h3 += carry[2] + h2 -= carry[2] << 26 + carry[6] = (h6 + (1 << 25)) >> 26 + h7 += carry[6] + h6 -= carry[6] << 26 + // |h2| <= 2^25; from now on fits into int32 unchanged + // |h6| <= 2^25; from now on fits into int32 unchanged + // |h3| <= 1.51*2^58 + // |h7| <= 1.51*2^58 + + carry[3] = (h3 + (1 << 24)) >> 25 + h4 += carry[3] + h3 -= carry[3] << 25 + carry[7] = (h7 + (1 << 24)) >> 25 + h8 += carry[7] + h7 -= carry[7] << 25 + // |h3| <= 2^24; from now on fits into int32 unchanged + // |h7| <= 2^24; from now on fits into int32 unchanged + // |h4| <= 1.52*2^33 + // |h8| <= 1.52*2^33 + + carry[4] = (h4 + (1 << 25)) >> 26 + h5 += carry[4] + h4 -= carry[4] << 26 + carry[8] = (h8 + (1 << 25)) >> 26 + h9 += carry[8] + h8 -= carry[8] << 26 + // |h4| <= 2^25; from now on fits into int32 unchanged + // |h8| <= 2^25; from now on fits into int32 unchanged + // |h5| <= 1.01*2^24 + // |h9| <= 1.51*2^58 + + carry[9] = (h9 + (1 << 24)) >> 25 + h0 += carry[9] * 19 + h9 -= carry[9] << 25 + // |h9| <= 2^24; from now on fits into int32 unchanged + // |h0| <= 1.8*2^37 + + carry[0] = (h0 + (1 << 25)) >> 26 + h1 += carry[0] + h0 -= carry[0] << 26 + // |h0| <= 2^25; from now on fits into int32 unchanged + // |h1| <= 1.01*2^24 + + h[0] = int32(h0) + h[1] = int32(h1) + h[2] = int32(h2) + h[3] = int32(h3) + h[4] = int32(h4) + h[5] = int32(h5) + h[6] = int32(h6) + h[7] = int32(h7) + h[8] = int32(h8) + h[9] = int32(h9) +} + +// feSquare calculates h = f*f. Can overlap h with f. +// +// Preconditions: +// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +// +// Postconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +func feSquare(h, f *fieldElement) { + f0 := f[0] + f1 := f[1] + f2 := f[2] + f3 := f[3] + f4 := f[4] + f5 := f[5] + f6 := f[6] + f7 := f[7] + f8 := f[8] + f9 := f[9] + f0_2 := 2 * f0 + f1_2 := 2 * f1 + f2_2 := 2 * f2 + f3_2 := 2 * f3 + f4_2 := 2 * f4 + f5_2 := 2 * f5 + f6_2 := 2 * f6 + f7_2 := 2 * f7 + f5_38 := 38 * f5 // 1.31*2^30 + f6_19 := 19 * f6 // 1.31*2^30 + f7_38 := 38 * f7 // 1.31*2^30 + f8_19 := 19 * f8 // 1.31*2^30 + f9_38 := 38 * f9 // 1.31*2^30 + f0f0 := int64(f0) * int64(f0) + f0f1_2 := int64(f0_2) * int64(f1) + f0f2_2 := int64(f0_2) * int64(f2) + f0f3_2 := int64(f0_2) * int64(f3) + f0f4_2 := int64(f0_2) * int64(f4) + f0f5_2 := int64(f0_2) * int64(f5) + f0f6_2 := int64(f0_2) * int64(f6) + f0f7_2 := int64(f0_2) * int64(f7) + f0f8_2 := int64(f0_2) * int64(f8) + f0f9_2 := int64(f0_2) * int64(f9) + f1f1_2 := int64(f1_2) * int64(f1) + f1f2_2 := int64(f1_2) * int64(f2) + f1f3_4 := int64(f1_2) * int64(f3_2) + f1f4_2 := int64(f1_2) * int64(f4) + f1f5_4 := int64(f1_2) * int64(f5_2) + f1f6_2 := int64(f1_2) * int64(f6) + f1f7_4 := int64(f1_2) * int64(f7_2) + f1f8_2 := int64(f1_2) * int64(f8) + f1f9_76 := int64(f1_2) * int64(f9_38) + f2f2 := int64(f2) * int64(f2) + f2f3_2 := int64(f2_2) * int64(f3) + f2f4_2 := int64(f2_2) * int64(f4) + f2f5_2 := int64(f2_2) * int64(f5) + f2f6_2 := int64(f2_2) * int64(f6) + f2f7_2 := int64(f2_2) * int64(f7) + f2f8_38 := int64(f2_2) * int64(f8_19) + f2f9_38 := int64(f2) * int64(f9_38) + f3f3_2 := int64(f3_2) * int64(f3) + f3f4_2 := int64(f3_2) * int64(f4) + f3f5_4 := int64(f3_2) * int64(f5_2) + f3f6_2 := int64(f3_2) * int64(f6) + f3f7_76 := int64(f3_2) * int64(f7_38) + f3f8_38 := int64(f3_2) * int64(f8_19) + f3f9_76 := int64(f3_2) * int64(f9_38) + f4f4 := int64(f4) * int64(f4) + f4f5_2 := int64(f4_2) * int64(f5) + f4f6_38 := int64(f4_2) * int64(f6_19) + f4f7_38 := int64(f4) * int64(f7_38) + f4f8_38 := int64(f4_2) * int64(f8_19) + f4f9_38 := int64(f4) * int64(f9_38) + f5f5_38 := int64(f5) * int64(f5_38) + f5f6_38 := int64(f5_2) * int64(f6_19) + f5f7_76 := int64(f5_2) * int64(f7_38) + f5f8_38 := int64(f5_2) * int64(f8_19) + f5f9_76 := int64(f5_2) * int64(f9_38) + f6f6_19 := int64(f6) * int64(f6_19) + f6f7_38 := int64(f6) * int64(f7_38) + f6f8_38 := int64(f6_2) * int64(f8_19) + f6f9_38 := int64(f6) * int64(f9_38) + f7f7_38 := int64(f7) * int64(f7_38) + f7f8_38 := int64(f7_2) * int64(f8_19) + f7f9_76 := int64(f7_2) * int64(f9_38) + f8f8_19 := int64(f8) * int64(f8_19) + f8f9_38 := int64(f8) * int64(f9_38) + f9f9_38 := int64(f9) * int64(f9_38) + h0 := f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38 + h1 := f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38 + h2 := f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19 + h3 := f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38 + h4 := f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38 + h5 := f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38 + h6 := f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19 + h7 := f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38 + h8 := f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38 + h9 := f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2 + var carry [10]int64 + + carry[0] = (h0 + (1 << 25)) >> 26 + h1 += carry[0] + h0 -= carry[0] << 26 + carry[4] = (h4 + (1 << 25)) >> 26 + h5 += carry[4] + h4 -= carry[4] << 26 + + carry[1] = (h1 + (1 << 24)) >> 25 + h2 += carry[1] + h1 -= carry[1] << 25 + carry[5] = (h5 + (1 << 24)) >> 25 + h6 += carry[5] + h5 -= carry[5] << 25 + + carry[2] = (h2 + (1 << 25)) >> 26 + h3 += carry[2] + h2 -= carry[2] << 26 + carry[6] = (h6 + (1 << 25)) >> 26 + h7 += carry[6] + h6 -= carry[6] << 26 + + carry[3] = (h3 + (1 << 24)) >> 25 + h4 += carry[3] + h3 -= carry[3] << 25 + carry[7] = (h7 + (1 << 24)) >> 25 + h8 += carry[7] + h7 -= carry[7] << 25 + + carry[4] = (h4 + (1 << 25)) >> 26 + h5 += carry[4] + h4 -= carry[4] << 26 + carry[8] = (h8 + (1 << 25)) >> 26 + h9 += carry[8] + h8 -= carry[8] << 26 + + carry[9] = (h9 + (1 << 24)) >> 25 + h0 += carry[9] * 19 + h9 -= carry[9] << 25 + + carry[0] = (h0 + (1 << 25)) >> 26 + h1 += carry[0] + h0 -= carry[0] << 26 + + h[0] = int32(h0) + h[1] = int32(h1) + h[2] = int32(h2) + h[3] = int32(h3) + h[4] = int32(h4) + h[5] = int32(h5) + h[6] = int32(h6) + h[7] = int32(h7) + h[8] = int32(h8) + h[9] = int32(h9) +} + +// feMul121666 calculates h = f * 121666. Can overlap h with f. +// +// Preconditions: +// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +// +// Postconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +func feMul121666(h, f *fieldElement) { + h0 := int64(f[0]) * 121666 + h1 := int64(f[1]) * 121666 + h2 := int64(f[2]) * 121666 + h3 := int64(f[3]) * 121666 + h4 := int64(f[4]) * 121666 + h5 := int64(f[5]) * 121666 + h6 := int64(f[6]) * 121666 + h7 := int64(f[7]) * 121666 + h8 := int64(f[8]) * 121666 + h9 := int64(f[9]) * 121666 + var carry [10]int64 + + carry[9] = (h9 + (1 << 24)) >> 25 + h0 += carry[9] * 19 + h9 -= carry[9] << 25 + carry[1] = (h1 + (1 << 24)) >> 25 + h2 += carry[1] + h1 -= carry[1] << 25 + carry[3] = (h3 + (1 << 24)) >> 25 + h4 += carry[3] + h3 -= carry[3] << 25 + carry[5] = (h5 + (1 << 24)) >> 25 + h6 += carry[5] + h5 -= carry[5] << 25 + carry[7] = (h7 + (1 << 24)) >> 25 + h8 += carry[7] + h7 -= carry[7] << 25 + + carry[0] = (h0 + (1 << 25)) >> 26 + h1 += carry[0] + h0 -= carry[0] << 26 + carry[2] = (h2 + (1 << 25)) >> 26 + h3 += carry[2] + h2 -= carry[2] << 26 + carry[4] = (h4 + (1 << 25)) >> 26 + h5 += carry[4] + h4 -= carry[4] << 26 + carry[6] = (h6 + (1 << 25)) >> 26 + h7 += carry[6] + h6 -= carry[6] << 26 + carry[8] = (h8 + (1 << 25)) >> 26 + h9 += carry[8] + h8 -= carry[8] << 26 + + h[0] = int32(h0) + h[1] = int32(h1) + h[2] = int32(h2) + h[3] = int32(h3) + h[4] = int32(h4) + h[5] = int32(h5) + h[6] = int32(h6) + h[7] = int32(h7) + h[8] = int32(h8) + h[9] = int32(h9) +} + +// feInvert sets out = z^-1. +func feInvert(out, z *fieldElement) { + var t0, t1, t2, t3 fieldElement + var i int + + feSquare(&t0, z) + for i = 1; i < 1; i++ { + feSquare(&t0, &t0) + } + feSquare(&t1, &t0) + for i = 1; i < 2; i++ { + feSquare(&t1, &t1) + } + feMul(&t1, z, &t1) + feMul(&t0, &t0, &t1) + feSquare(&t2, &t0) + for i = 1; i < 1; i++ { + feSquare(&t2, &t2) + } + feMul(&t1, &t1, &t2) + feSquare(&t2, &t1) + for i = 1; i < 5; i++ { + feSquare(&t2, &t2) + } + feMul(&t1, &t2, &t1) + feSquare(&t2, &t1) + for i = 1; i < 10; i++ { + feSquare(&t2, &t2) + } + feMul(&t2, &t2, &t1) + feSquare(&t3, &t2) + for i = 1; i < 20; i++ { + feSquare(&t3, &t3) + } + feMul(&t2, &t3, &t2) + feSquare(&t2, &t2) + for i = 1; i < 10; i++ { + feSquare(&t2, &t2) + } + feMul(&t1, &t2, &t1) + feSquare(&t2, &t1) + for i = 1; i < 50; i++ { + feSquare(&t2, &t2) + } + feMul(&t2, &t2, &t1) + feSquare(&t3, &t2) + for i = 1; i < 100; i++ { + feSquare(&t3, &t3) + } + feMul(&t2, &t3, &t2) + feSquare(&t2, &t2) + for i = 1; i < 50; i++ { + feSquare(&t2, &t2) + } + feMul(&t1, &t2, &t1) + feSquare(&t1, &t1) + for i = 1; i < 5; i++ { + feSquare(&t1, &t1) + } + feMul(out, &t1, &t0) +} + +func scalarMult(out, in, base *[32]byte) { + var e [32]byte + + copy(e[:], in[:]) + e[0] &= 248 + e[31] &= 127 + e[31] |= 64 + + var x1, x2, z2, x3, z3, tmp0, tmp1 fieldElement + feFromBytes(&x1, base) + feOne(&x2) + feCopy(&x3, &x1) + feOne(&z3) + + swap := int32(0) + for pos := 254; pos >= 0; pos-- { + b := e[pos/8] >> uint(pos&7) + b &= 1 + swap ^= int32(b) + feCSwap(&x2, &x3, swap) + feCSwap(&z2, &z3, swap) + swap = int32(b) + + feSub(&tmp0, &x3, &z3) + feSub(&tmp1, &x2, &z2) + feAdd(&x2, &x2, &z2) + feAdd(&z2, &x3, &z3) + feMul(&z3, &tmp0, &x2) + feMul(&z2, &z2, &tmp1) + feSquare(&tmp0, &tmp1) + feSquare(&tmp1, &x2) + feAdd(&x3, &z3, &z2) + feSub(&z2, &z3, &z2) + feMul(&x2, &tmp1, &tmp0) + feSub(&tmp1, &tmp1, &tmp0) + feSquare(&z2, &z2) + feMul121666(&z3, &tmp1) + feSquare(&x3, &x3) + feAdd(&tmp0, &tmp0, &z3) + feMul(&z3, &x1, &z2) + feMul(&z2, &tmp1, &tmp0) + } + + feCSwap(&x2, &x3, swap) + feCSwap(&z2, &z3, swap) + + feInvert(&z2, &z2) + feMul(&x2, &x2, &z2) + feToBytes(out, &x2) +} diff --git a/vendor/github.com/keybase/go-crypto/curve25519/curve_impl.go b/vendor/github.com/keybase/go-crypto/curve25519/curve_impl.go new file mode 100644 index 000000000..5f9eebebf --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/curve_impl.go @@ -0,0 +1,113 @@ +package curve25519 + +import ( + "crypto/elliptic" + "math/big" + "sync" +) + +var cv25519 cv25519Curve + +type cv25519Curve struct { + *elliptic.CurveParams +} + +func copyReverse(dst []byte, src []byte) { + // Curve 25519 multiplication functions expect scalars in reverse + // order than PGP. To keep the curve25519Curve type consistent + // with other curves, we reverse it here. + for i, j := 0, len(src)-1; j >= 0; i, j = i+1, j-1 { + dst[i] = src[j] + } +} + +func (cv25519Curve) ScalarMult(x1, y1 *big.Int, scalar []byte) (x, y *big.Int) { + // Assume y1 is 0 with cv25519. + var dst [32]byte + var x1Bytes [32]byte + var scalarBytes [32]byte + + copy(x1Bytes[:], x1.Bytes()[:32]) + copyReverse(scalarBytes[:], scalar[:32]) + + scalarMult(&dst, &scalarBytes, &x1Bytes) + + x = new(big.Int).SetBytes(dst[:]) + y = new(big.Int) + return x, y +} + +func (cv25519Curve) ScalarBaseMult(scalar []byte) (x, y *big.Int) { + var dst [32]byte + var scalarBytes [32]byte + copyReverse(scalarBytes[:], scalar[:32]) + scalarMult(&dst, &scalarBytes, &basePoint) + x = new(big.Int).SetBytes(dst[:]) + y = new(big.Int) + return x, y +} + +func (cv25519Curve) IsOnCurve(bigX, bigY *big.Int) bool { + return bigY.Sign() == 0 // bigY == 0 ? +} + +// More information about 0x40 point format: +// https://tools.ietf.org/html/draft-koch-eddsa-for-openpgp-00#section-3 +// In addition to uncompressed point format described here: +// https://tools.ietf.org/html/rfc6637#section-6 + +func (cv25519Curve) MarshalType40(x, y *big.Int) []byte { + byteLen := 32 + + ret := make([]byte, 1+byteLen) + ret[0] = 0x40 + + xBytes := x.Bytes() + copy(ret[1+byteLen-len(xBytes):], xBytes) + return ret +} + +func (cv25519Curve) UnmarshalType40(data []byte) (x, y *big.Int) { + if len(data) != 1+32 { + return nil, nil + } + if data[0] != 0x40 { + return nil, nil + } + x = new(big.Int).SetBytes(data[1:]) + // Any x is a valid curve point. + return x, new(big.Int) +} + +// ToCurve25519 casts given elliptic.Curve type to Curve25519 type, or +// returns nil, false if cast was unsuccessful. +func ToCurve25519(cv elliptic.Curve) (cv25519Curve, bool) { + cv2, ok := cv.(cv25519Curve) + return cv2, ok +} + +func initCv25519() { + cv25519.CurveParams = &elliptic.CurveParams{Name: "Curve 25519"} + // Some code relies on these parameters being available for + // checking Curve coordinate length. They should not be used + // directly for any calculations. + cv25519.P, _ = new (big.Int).SetString("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffed", 16) + cv25519.N, _ = new (big.Int).SetString("1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed", 16) + cv25519.Gx, _ = new (big.Int).SetString("9", 16) + cv25519.Gy, _ = new (big.Int).SetString("20ae19a1b8a086b4e01edd2c7748d14c923d4d7e6d7c61b229e9c5a27eced3d9", 16) + cv25519.BitSize = 256 +} + +var initonce sync.Once + +// Cv25519 returns a Curve which (partially) implements Cv25519. Only +// ScalarMult and ScalarBaseMult are valid for this curve. Add and +// Double should not be used. +func Cv25519() elliptic.Curve { + initonce.Do(initCv25519) + return cv25519 +} + +func (curve cv25519Curve) Params() *elliptic.CurveParams { + return curve.CurveParams +} diff --git a/vendor/github.com/keybase/go-crypto/curve25519/doc.go b/vendor/github.com/keybase/go-crypto/curve25519/doc.go new file mode 100644 index 000000000..f7db9c1ce --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/doc.go @@ -0,0 +1,23 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package curve25519 provides an implementation of scalar multiplication on +// the elliptic curve known as curve25519. See http://cr.yp.to/ecdh.html +package curve25519 + +// basePoint is the x coordinate of the generator of the curve. +var basePoint = [32]byte{9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} + +// ScalarMult sets dst to the product in*base where dst and base are the x +// coordinates of group points and all values are in little-endian form. +func ScalarMult(dst, in, base *[32]byte) { + scalarMult(dst, in, base) +} + +// ScalarBaseMult sets dst to the product in*base where dst and base are the x +// coordinates of group points, base is the standard generator and all values +// are in little-endian form. +func ScalarBaseMult(dst, in *[32]byte) { + ScalarMult(dst, in, &basePoint) +} diff --git a/vendor/github.com/keybase/go-crypto/curve25519/freeze_amd64.s b/vendor/github.com/keybase/go-crypto/curve25519/freeze_amd64.s new file mode 100644 index 000000000..37599fac0 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/freeze_amd64.s @@ -0,0 +1,94 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This code was translated into a form compatible with 6a from the public +// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html + +// +build amd64,!gccgo,!appengine + +// func freeze(inout *[5]uint64) +TEXT ·freeze(SB),7,$96-8 + MOVQ inout+0(FP), DI + + MOVQ SP,R11 + MOVQ $31,CX + NOTQ CX + ANDQ CX,SP + ADDQ $32,SP + + MOVQ R11,0(SP) + MOVQ R12,8(SP) + MOVQ R13,16(SP) + MOVQ R14,24(SP) + MOVQ R15,32(SP) + MOVQ BX,40(SP) + MOVQ BP,48(SP) + MOVQ 0(DI),SI + MOVQ 8(DI),DX + MOVQ 16(DI),CX + MOVQ 24(DI),R8 + MOVQ 32(DI),R9 + MOVQ ·REDMASK51(SB),AX + MOVQ AX,R10 + SUBQ $18,R10 + MOVQ $3,R11 +REDUCELOOP: + MOVQ SI,R12 + SHRQ $51,R12 + ANDQ AX,SI + ADDQ R12,DX + MOVQ DX,R12 + SHRQ $51,R12 + ANDQ AX,DX + ADDQ R12,CX + MOVQ CX,R12 + SHRQ $51,R12 + ANDQ AX,CX + ADDQ R12,R8 + MOVQ R8,R12 + SHRQ $51,R12 + ANDQ AX,R8 + ADDQ R12,R9 + MOVQ R9,R12 + SHRQ $51,R12 + ANDQ AX,R9 + IMUL3Q $19,R12,R12 + ADDQ R12,SI + SUBQ $1,R11 + JA REDUCELOOP + MOVQ $1,R12 + CMPQ R10,SI + CMOVQLT R11,R12 + CMPQ AX,DX + CMOVQNE R11,R12 + CMPQ AX,CX + CMOVQNE R11,R12 + CMPQ AX,R8 + CMOVQNE R11,R12 + CMPQ AX,R9 + CMOVQNE R11,R12 + NEGQ R12 + ANDQ R12,AX + ANDQ R12,R10 + SUBQ R10,SI + SUBQ AX,DX + SUBQ AX,CX + SUBQ AX,R8 + SUBQ AX,R9 + MOVQ SI,0(DI) + MOVQ DX,8(DI) + MOVQ CX,16(DI) + MOVQ R8,24(DI) + MOVQ R9,32(DI) + MOVQ 0(SP),R11 + MOVQ 8(SP),R12 + MOVQ 16(SP),R13 + MOVQ 24(SP),R14 + MOVQ 32(SP),R15 + MOVQ 40(SP),BX + MOVQ 48(SP),BP + MOVQ R11,SP + MOVQ DI,AX + MOVQ SI,DX + RET diff --git a/vendor/github.com/keybase/go-crypto/curve25519/ladderstep_amd64.s b/vendor/github.com/keybase/go-crypto/curve25519/ladderstep_amd64.s new file mode 100644 index 000000000..3949f9cfa --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/ladderstep_amd64.s @@ -0,0 +1,1398 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This code was translated into a form compatible with 6a from the public +// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html + +// +build amd64,!gccgo,!appengine + +// func ladderstep(inout *[5][5]uint64) +TEXT ·ladderstep(SB),0,$384-8 + MOVQ inout+0(FP),DI + + MOVQ SP,R11 + MOVQ $31,CX + NOTQ CX + ANDQ CX,SP + ADDQ $32,SP + + MOVQ R11,0(SP) + MOVQ R12,8(SP) + MOVQ R13,16(SP) + MOVQ R14,24(SP) + MOVQ R15,32(SP) + MOVQ BX,40(SP) + MOVQ BP,48(SP) + MOVQ 40(DI),SI + MOVQ 48(DI),DX + MOVQ 56(DI),CX + MOVQ 64(DI),R8 + MOVQ 72(DI),R9 + MOVQ SI,AX + MOVQ DX,R10 + MOVQ CX,R11 + MOVQ R8,R12 + MOVQ R9,R13 + ADDQ ·_2P0(SB),AX + ADDQ ·_2P1234(SB),R10 + ADDQ ·_2P1234(SB),R11 + ADDQ ·_2P1234(SB),R12 + ADDQ ·_2P1234(SB),R13 + ADDQ 80(DI),SI + ADDQ 88(DI),DX + ADDQ 96(DI),CX + ADDQ 104(DI),R8 + ADDQ 112(DI),R9 + SUBQ 80(DI),AX + SUBQ 88(DI),R10 + SUBQ 96(DI),R11 + SUBQ 104(DI),R12 + SUBQ 112(DI),R13 + MOVQ SI,56(SP) + MOVQ DX,64(SP) + MOVQ CX,72(SP) + MOVQ R8,80(SP) + MOVQ R9,88(SP) + MOVQ AX,96(SP) + MOVQ R10,104(SP) + MOVQ R11,112(SP) + MOVQ R12,120(SP) + MOVQ R13,128(SP) + MOVQ 96(SP),AX + MULQ 96(SP) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 96(SP),AX + SHLQ $1,AX + MULQ 104(SP) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 96(SP),AX + SHLQ $1,AX + MULQ 112(SP) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 96(SP),AX + SHLQ $1,AX + MULQ 120(SP) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 96(SP),AX + SHLQ $1,AX + MULQ 128(SP) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 104(SP),AX + MULQ 104(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 104(SP),AX + SHLQ $1,AX + MULQ 112(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 104(SP),AX + SHLQ $1,AX + MULQ 120(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 104(SP),DX + IMUL3Q $38,DX,AX + MULQ 128(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 112(SP),AX + MULQ 112(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 112(SP),DX + IMUL3Q $38,DX,AX + MULQ 120(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 112(SP),DX + IMUL3Q $38,DX,AX + MULQ 128(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 120(SP),DX + IMUL3Q $19,DX,AX + MULQ 120(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 120(SP),DX + IMUL3Q $38,DX,AX + MULQ 128(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 128(SP),DX + IMUL3Q $19,DX,AX + MULQ 128(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + ANDQ DX,SI + MOVQ CX,R8 + SHRQ $51,CX + ADDQ R10,CX + ANDQ DX,R8 + MOVQ CX,R9 + SHRQ $51,CX + ADDQ R12,CX + ANDQ DX,R9 + MOVQ CX,AX + SHRQ $51,CX + ADDQ R14,CX + ANDQ DX,AX + MOVQ CX,R10 + SHRQ $51,CX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,136(SP) + MOVQ R8,144(SP) + MOVQ R9,152(SP) + MOVQ AX,160(SP) + MOVQ R10,168(SP) + MOVQ 56(SP),AX + MULQ 56(SP) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 56(SP),AX + SHLQ $1,AX + MULQ 64(SP) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 56(SP),AX + SHLQ $1,AX + MULQ 72(SP) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 56(SP),AX + SHLQ $1,AX + MULQ 80(SP) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 56(SP),AX + SHLQ $1,AX + MULQ 88(SP) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 64(SP),AX + MULQ 64(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 64(SP),AX + SHLQ $1,AX + MULQ 72(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 64(SP),AX + SHLQ $1,AX + MULQ 80(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 64(SP),DX + IMUL3Q $38,DX,AX + MULQ 88(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 72(SP),AX + MULQ 72(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 72(SP),DX + IMUL3Q $38,DX,AX + MULQ 80(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 72(SP),DX + IMUL3Q $38,DX,AX + MULQ 88(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 80(SP),DX + IMUL3Q $19,DX,AX + MULQ 80(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 80(SP),DX + IMUL3Q $38,DX,AX + MULQ 88(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 88(SP),DX + IMUL3Q $19,DX,AX + MULQ 88(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + ANDQ DX,SI + MOVQ CX,R8 + SHRQ $51,CX + ADDQ R10,CX + ANDQ DX,R8 + MOVQ CX,R9 + SHRQ $51,CX + ADDQ R12,CX + ANDQ DX,R9 + MOVQ CX,AX + SHRQ $51,CX + ADDQ R14,CX + ANDQ DX,AX + MOVQ CX,R10 + SHRQ $51,CX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,176(SP) + MOVQ R8,184(SP) + MOVQ R9,192(SP) + MOVQ AX,200(SP) + MOVQ R10,208(SP) + MOVQ SI,SI + MOVQ R8,DX + MOVQ R9,CX + MOVQ AX,R8 + MOVQ R10,R9 + ADDQ ·_2P0(SB),SI + ADDQ ·_2P1234(SB),DX + ADDQ ·_2P1234(SB),CX + ADDQ ·_2P1234(SB),R8 + ADDQ ·_2P1234(SB),R9 + SUBQ 136(SP),SI + SUBQ 144(SP),DX + SUBQ 152(SP),CX + SUBQ 160(SP),R8 + SUBQ 168(SP),R9 + MOVQ SI,216(SP) + MOVQ DX,224(SP) + MOVQ CX,232(SP) + MOVQ R8,240(SP) + MOVQ R9,248(SP) + MOVQ 120(DI),SI + MOVQ 128(DI),DX + MOVQ 136(DI),CX + MOVQ 144(DI),R8 + MOVQ 152(DI),R9 + MOVQ SI,AX + MOVQ DX,R10 + MOVQ CX,R11 + MOVQ R8,R12 + MOVQ R9,R13 + ADDQ ·_2P0(SB),AX + ADDQ ·_2P1234(SB),R10 + ADDQ ·_2P1234(SB),R11 + ADDQ ·_2P1234(SB),R12 + ADDQ ·_2P1234(SB),R13 + ADDQ 160(DI),SI + ADDQ 168(DI),DX + ADDQ 176(DI),CX + ADDQ 184(DI),R8 + ADDQ 192(DI),R9 + SUBQ 160(DI),AX + SUBQ 168(DI),R10 + SUBQ 176(DI),R11 + SUBQ 184(DI),R12 + SUBQ 192(DI),R13 + MOVQ SI,256(SP) + MOVQ DX,264(SP) + MOVQ CX,272(SP) + MOVQ R8,280(SP) + MOVQ R9,288(SP) + MOVQ AX,296(SP) + MOVQ R10,304(SP) + MOVQ R11,312(SP) + MOVQ R12,320(SP) + MOVQ R13,328(SP) + MOVQ 280(SP),SI + IMUL3Q $19,SI,AX + MOVQ AX,336(SP) + MULQ 112(SP) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 288(SP),DX + IMUL3Q $19,DX,AX + MOVQ AX,344(SP) + MULQ 104(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 256(SP),AX + MULQ 96(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 256(SP),AX + MULQ 104(SP) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 256(SP),AX + MULQ 112(SP) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 256(SP),AX + MULQ 120(SP) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 256(SP),AX + MULQ 128(SP) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 264(SP),AX + MULQ 96(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 264(SP),AX + MULQ 104(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 264(SP),AX + MULQ 112(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 264(SP),AX + MULQ 120(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 264(SP),DX + IMUL3Q $19,DX,AX + MULQ 128(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 272(SP),AX + MULQ 96(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 272(SP),AX + MULQ 104(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 272(SP),AX + MULQ 112(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 272(SP),DX + IMUL3Q $19,DX,AX + MULQ 120(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 272(SP),DX + IMUL3Q $19,DX,AX + MULQ 128(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 280(SP),AX + MULQ 96(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 280(SP),AX + MULQ 104(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 336(SP),AX + MULQ 120(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 336(SP),AX + MULQ 128(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 288(SP),AX + MULQ 96(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 344(SP),AX + MULQ 112(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 344(SP),AX + MULQ 120(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 344(SP),AX + MULQ 128(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + MOVQ CX,R8 + SHRQ $51,CX + ANDQ DX,SI + ADDQ R10,CX + MOVQ CX,R9 + SHRQ $51,CX + ANDQ DX,R8 + ADDQ R12,CX + MOVQ CX,AX + SHRQ $51,CX + ANDQ DX,R9 + ADDQ R14,CX + MOVQ CX,R10 + SHRQ $51,CX + ANDQ DX,AX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,96(SP) + MOVQ R8,104(SP) + MOVQ R9,112(SP) + MOVQ AX,120(SP) + MOVQ R10,128(SP) + MOVQ 320(SP),SI + IMUL3Q $19,SI,AX + MOVQ AX,256(SP) + MULQ 72(SP) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 328(SP),DX + IMUL3Q $19,DX,AX + MOVQ AX,264(SP) + MULQ 64(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 296(SP),AX + MULQ 56(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 296(SP),AX + MULQ 64(SP) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 296(SP),AX + MULQ 72(SP) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 296(SP),AX + MULQ 80(SP) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 296(SP),AX + MULQ 88(SP) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 304(SP),AX + MULQ 56(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 304(SP),AX + MULQ 64(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 304(SP),AX + MULQ 72(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 304(SP),AX + MULQ 80(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 304(SP),DX + IMUL3Q $19,DX,AX + MULQ 88(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 312(SP),AX + MULQ 56(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 312(SP),AX + MULQ 64(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 312(SP),AX + MULQ 72(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 312(SP),DX + IMUL3Q $19,DX,AX + MULQ 80(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 312(SP),DX + IMUL3Q $19,DX,AX + MULQ 88(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 320(SP),AX + MULQ 56(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 320(SP),AX + MULQ 64(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 256(SP),AX + MULQ 80(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 256(SP),AX + MULQ 88(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 328(SP),AX + MULQ 56(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 264(SP),AX + MULQ 72(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 264(SP),AX + MULQ 80(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 264(SP),AX + MULQ 88(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + MOVQ CX,R8 + SHRQ $51,CX + ANDQ DX,SI + ADDQ R10,CX + MOVQ CX,R9 + SHRQ $51,CX + ANDQ DX,R8 + ADDQ R12,CX + MOVQ CX,AX + SHRQ $51,CX + ANDQ DX,R9 + ADDQ R14,CX + MOVQ CX,R10 + SHRQ $51,CX + ANDQ DX,AX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,DX + MOVQ R8,CX + MOVQ R9,R11 + MOVQ AX,R12 + MOVQ R10,R13 + ADDQ ·_2P0(SB),DX + ADDQ ·_2P1234(SB),CX + ADDQ ·_2P1234(SB),R11 + ADDQ ·_2P1234(SB),R12 + ADDQ ·_2P1234(SB),R13 + ADDQ 96(SP),SI + ADDQ 104(SP),R8 + ADDQ 112(SP),R9 + ADDQ 120(SP),AX + ADDQ 128(SP),R10 + SUBQ 96(SP),DX + SUBQ 104(SP),CX + SUBQ 112(SP),R11 + SUBQ 120(SP),R12 + SUBQ 128(SP),R13 + MOVQ SI,120(DI) + MOVQ R8,128(DI) + MOVQ R9,136(DI) + MOVQ AX,144(DI) + MOVQ R10,152(DI) + MOVQ DX,160(DI) + MOVQ CX,168(DI) + MOVQ R11,176(DI) + MOVQ R12,184(DI) + MOVQ R13,192(DI) + MOVQ 120(DI),AX + MULQ 120(DI) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 120(DI),AX + SHLQ $1,AX + MULQ 128(DI) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 120(DI),AX + SHLQ $1,AX + MULQ 136(DI) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 120(DI),AX + SHLQ $1,AX + MULQ 144(DI) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 120(DI),AX + SHLQ $1,AX + MULQ 152(DI) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 128(DI),AX + MULQ 128(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 128(DI),AX + SHLQ $1,AX + MULQ 136(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 128(DI),AX + SHLQ $1,AX + MULQ 144(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 128(DI),DX + IMUL3Q $38,DX,AX + MULQ 152(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 136(DI),AX + MULQ 136(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 136(DI),DX + IMUL3Q $38,DX,AX + MULQ 144(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 136(DI),DX + IMUL3Q $38,DX,AX + MULQ 152(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 144(DI),DX + IMUL3Q $19,DX,AX + MULQ 144(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 144(DI),DX + IMUL3Q $38,DX,AX + MULQ 152(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 152(DI),DX + IMUL3Q $19,DX,AX + MULQ 152(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + ANDQ DX,SI + MOVQ CX,R8 + SHRQ $51,CX + ADDQ R10,CX + ANDQ DX,R8 + MOVQ CX,R9 + SHRQ $51,CX + ADDQ R12,CX + ANDQ DX,R9 + MOVQ CX,AX + SHRQ $51,CX + ADDQ R14,CX + ANDQ DX,AX + MOVQ CX,R10 + SHRQ $51,CX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,120(DI) + MOVQ R8,128(DI) + MOVQ R9,136(DI) + MOVQ AX,144(DI) + MOVQ R10,152(DI) + MOVQ 160(DI),AX + MULQ 160(DI) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 160(DI),AX + SHLQ $1,AX + MULQ 168(DI) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 160(DI),AX + SHLQ $1,AX + MULQ 176(DI) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 160(DI),AX + SHLQ $1,AX + MULQ 184(DI) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 160(DI),AX + SHLQ $1,AX + MULQ 192(DI) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 168(DI),AX + MULQ 168(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 168(DI),AX + SHLQ $1,AX + MULQ 176(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 168(DI),AX + SHLQ $1,AX + MULQ 184(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 168(DI),DX + IMUL3Q $38,DX,AX + MULQ 192(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 176(DI),AX + MULQ 176(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 176(DI),DX + IMUL3Q $38,DX,AX + MULQ 184(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 176(DI),DX + IMUL3Q $38,DX,AX + MULQ 192(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 184(DI),DX + IMUL3Q $19,DX,AX + MULQ 184(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 184(DI),DX + IMUL3Q $38,DX,AX + MULQ 192(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 192(DI),DX + IMUL3Q $19,DX,AX + MULQ 192(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + ANDQ DX,SI + MOVQ CX,R8 + SHRQ $51,CX + ADDQ R10,CX + ANDQ DX,R8 + MOVQ CX,R9 + SHRQ $51,CX + ADDQ R12,CX + ANDQ DX,R9 + MOVQ CX,AX + SHRQ $51,CX + ADDQ R14,CX + ANDQ DX,AX + MOVQ CX,R10 + SHRQ $51,CX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,160(DI) + MOVQ R8,168(DI) + MOVQ R9,176(DI) + MOVQ AX,184(DI) + MOVQ R10,192(DI) + MOVQ 184(DI),SI + IMUL3Q $19,SI,AX + MOVQ AX,56(SP) + MULQ 16(DI) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 192(DI),DX + IMUL3Q $19,DX,AX + MOVQ AX,64(SP) + MULQ 8(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 160(DI),AX + MULQ 0(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 160(DI),AX + MULQ 8(DI) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 160(DI),AX + MULQ 16(DI) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 160(DI),AX + MULQ 24(DI) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 160(DI),AX + MULQ 32(DI) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 168(DI),AX + MULQ 0(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 168(DI),AX + MULQ 8(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 168(DI),AX + MULQ 16(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 168(DI),AX + MULQ 24(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 168(DI),DX + IMUL3Q $19,DX,AX + MULQ 32(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 176(DI),AX + MULQ 0(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 176(DI),AX + MULQ 8(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 176(DI),AX + MULQ 16(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 176(DI),DX + IMUL3Q $19,DX,AX + MULQ 24(DI) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 176(DI),DX + IMUL3Q $19,DX,AX + MULQ 32(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 184(DI),AX + MULQ 0(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 184(DI),AX + MULQ 8(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 56(SP),AX + MULQ 24(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 56(SP),AX + MULQ 32(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 192(DI),AX + MULQ 0(DI) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 64(SP),AX + MULQ 16(DI) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 64(SP),AX + MULQ 24(DI) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 64(SP),AX + MULQ 32(DI) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + MOVQ CX,R8 + SHRQ $51,CX + ANDQ DX,SI + ADDQ R10,CX + MOVQ CX,R9 + SHRQ $51,CX + ANDQ DX,R8 + ADDQ R12,CX + MOVQ CX,AX + SHRQ $51,CX + ANDQ DX,R9 + ADDQ R14,CX + MOVQ CX,R10 + SHRQ $51,CX + ANDQ DX,AX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,160(DI) + MOVQ R8,168(DI) + MOVQ R9,176(DI) + MOVQ AX,184(DI) + MOVQ R10,192(DI) + MOVQ 200(SP),SI + IMUL3Q $19,SI,AX + MOVQ AX,56(SP) + MULQ 152(SP) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 208(SP),DX + IMUL3Q $19,DX,AX + MOVQ AX,64(SP) + MULQ 144(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 176(SP),AX + MULQ 136(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 176(SP),AX + MULQ 144(SP) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 176(SP),AX + MULQ 152(SP) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 176(SP),AX + MULQ 160(SP) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 176(SP),AX + MULQ 168(SP) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 184(SP),AX + MULQ 136(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 184(SP),AX + MULQ 144(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 184(SP),AX + MULQ 152(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 184(SP),AX + MULQ 160(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 184(SP),DX + IMUL3Q $19,DX,AX + MULQ 168(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 192(SP),AX + MULQ 136(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 192(SP),AX + MULQ 144(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 192(SP),AX + MULQ 152(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 192(SP),DX + IMUL3Q $19,DX,AX + MULQ 160(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 192(SP),DX + IMUL3Q $19,DX,AX + MULQ 168(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 200(SP),AX + MULQ 136(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 200(SP),AX + MULQ 144(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 56(SP),AX + MULQ 160(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 56(SP),AX + MULQ 168(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 208(SP),AX + MULQ 136(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 64(SP),AX + MULQ 152(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 64(SP),AX + MULQ 160(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 64(SP),AX + MULQ 168(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + MOVQ CX,R8 + SHRQ $51,CX + ANDQ DX,SI + ADDQ R10,CX + MOVQ CX,R9 + SHRQ $51,CX + ANDQ DX,R8 + ADDQ R12,CX + MOVQ CX,AX + SHRQ $51,CX + ANDQ DX,R9 + ADDQ R14,CX + MOVQ CX,R10 + SHRQ $51,CX + ANDQ DX,AX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,40(DI) + MOVQ R8,48(DI) + MOVQ R9,56(DI) + MOVQ AX,64(DI) + MOVQ R10,72(DI) + MOVQ 216(SP),AX + MULQ ·_121666_213(SB) + SHRQ $13,AX + MOVQ AX,SI + MOVQ DX,CX + MOVQ 224(SP),AX + MULQ ·_121666_213(SB) + SHRQ $13,AX + ADDQ AX,CX + MOVQ DX,R8 + MOVQ 232(SP),AX + MULQ ·_121666_213(SB) + SHRQ $13,AX + ADDQ AX,R8 + MOVQ DX,R9 + MOVQ 240(SP),AX + MULQ ·_121666_213(SB) + SHRQ $13,AX + ADDQ AX,R9 + MOVQ DX,R10 + MOVQ 248(SP),AX + MULQ ·_121666_213(SB) + SHRQ $13,AX + ADDQ AX,R10 + IMUL3Q $19,DX,DX + ADDQ DX,SI + ADDQ 136(SP),SI + ADDQ 144(SP),CX + ADDQ 152(SP),R8 + ADDQ 160(SP),R9 + ADDQ 168(SP),R10 + MOVQ SI,80(DI) + MOVQ CX,88(DI) + MOVQ R8,96(DI) + MOVQ R9,104(DI) + MOVQ R10,112(DI) + MOVQ 104(DI),SI + IMUL3Q $19,SI,AX + MOVQ AX,56(SP) + MULQ 232(SP) + MOVQ AX,SI + MOVQ DX,CX + MOVQ 112(DI),DX + IMUL3Q $19,DX,AX + MOVQ AX,64(SP) + MULQ 224(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 80(DI),AX + MULQ 216(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 80(DI),AX + MULQ 224(SP) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 80(DI),AX + MULQ 232(SP) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 80(DI),AX + MULQ 240(SP) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 80(DI),AX + MULQ 248(SP) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 88(DI),AX + MULQ 216(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 88(DI),AX + MULQ 224(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 88(DI),AX + MULQ 232(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 88(DI),AX + MULQ 240(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 88(DI),DX + IMUL3Q $19,DX,AX + MULQ 248(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 96(DI),AX + MULQ 216(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 96(DI),AX + MULQ 224(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 96(DI),AX + MULQ 232(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 96(DI),DX + IMUL3Q $19,DX,AX + MULQ 240(SP) + ADDQ AX,SI + ADCQ DX,CX + MOVQ 96(DI),DX + IMUL3Q $19,DX,AX + MULQ 248(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 104(DI),AX + MULQ 216(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 104(DI),AX + MULQ 224(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 56(SP),AX + MULQ 240(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 56(SP),AX + MULQ 248(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 112(DI),AX + MULQ 216(SP) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 64(SP),AX + MULQ 232(SP) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 64(SP),AX + MULQ 240(SP) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 64(SP),AX + MULQ 248(SP) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ ·REDMASK51(SB),DX + SHLQ $13,CX:SI + ANDQ DX,SI + SHLQ $13,R9:R8 + ANDQ DX,R8 + ADDQ CX,R8 + SHLQ $13,R11:R10 + ANDQ DX,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ DX,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ DX,R14 + ADDQ R13,R14 + IMUL3Q $19,R15,CX + ADDQ CX,SI + MOVQ SI,CX + SHRQ $51,CX + ADDQ R8,CX + MOVQ CX,R8 + SHRQ $51,CX + ANDQ DX,SI + ADDQ R10,CX + MOVQ CX,R9 + SHRQ $51,CX + ANDQ DX,R8 + ADDQ R12,CX + MOVQ CX,AX + SHRQ $51,CX + ANDQ DX,R9 + ADDQ R14,CX + MOVQ CX,R10 + SHRQ $51,CX + ANDQ DX,AX + IMUL3Q $19,CX,CX + ADDQ CX,SI + ANDQ DX,R10 + MOVQ SI,80(DI) + MOVQ R8,88(DI) + MOVQ R9,96(DI) + MOVQ AX,104(DI) + MOVQ R10,112(DI) + MOVQ 0(SP),R11 + MOVQ 8(SP),R12 + MOVQ 16(SP),R13 + MOVQ 24(SP),R14 + MOVQ 32(SP),R15 + MOVQ 40(SP),BX + MOVQ 48(SP),BP + MOVQ R11,SP + MOVQ DI,AX + MOVQ SI,DX + RET diff --git a/vendor/github.com/keybase/go-crypto/curve25519/mont25519_amd64.go b/vendor/github.com/keybase/go-crypto/curve25519/mont25519_amd64.go new file mode 100644 index 000000000..5822bd533 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/mont25519_amd64.go @@ -0,0 +1,240 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build amd64,!gccgo,!appengine + +package curve25519 + +// These functions are implemented in the .s files. The names of the functions +// in the rest of the file are also taken from the SUPERCOP sources to help +// people following along. + +//go:noescape + +func cswap(inout *[5]uint64, v uint64) + +//go:noescape + +func ladderstep(inout *[5][5]uint64) + +//go:noescape + +func freeze(inout *[5]uint64) + +//go:noescape + +func mul(dest, a, b *[5]uint64) + +//go:noescape + +func square(out, in *[5]uint64) + +// mladder uses a Montgomery ladder to calculate (xr/zr) *= s. +func mladder(xr, zr *[5]uint64, s *[32]byte) { + var work [5][5]uint64 + + work[0] = *xr + setint(&work[1], 1) + setint(&work[2], 0) + work[3] = *xr + setint(&work[4], 1) + + j := uint(6) + var prevbit byte + + for i := 31; i >= 0; i-- { + for j < 8 { + bit := ((*s)[i] >> j) & 1 + swap := bit ^ prevbit + prevbit = bit + cswap(&work[1], uint64(swap)) + ladderstep(&work) + j-- + } + j = 7 + } + + *xr = work[1] + *zr = work[2] +} + +func scalarMult(out, in, base *[32]byte) { + var e [32]byte + copy(e[:], (*in)[:]) + e[0] &= 248 + e[31] &= 127 + e[31] |= 64 + + var t, z [5]uint64 + unpack(&t, base) + mladder(&t, &z, &e) + invert(&z, &z) + mul(&t, &t, &z) + pack(out, &t) +} + +func setint(r *[5]uint64, v uint64) { + r[0] = v + r[1] = 0 + r[2] = 0 + r[3] = 0 + r[4] = 0 +} + +// unpack sets r = x where r consists of 5, 51-bit limbs in little-endian +// order. +func unpack(r *[5]uint64, x *[32]byte) { + r[0] = uint64(x[0]) | + uint64(x[1])<<8 | + uint64(x[2])<<16 | + uint64(x[3])<<24 | + uint64(x[4])<<32 | + uint64(x[5])<<40 | + uint64(x[6]&7)<<48 + + r[1] = uint64(x[6])>>3 | + uint64(x[7])<<5 | + uint64(x[8])<<13 | + uint64(x[9])<<21 | + uint64(x[10])<<29 | + uint64(x[11])<<37 | + uint64(x[12]&63)<<45 + + r[2] = uint64(x[12])>>6 | + uint64(x[13])<<2 | + uint64(x[14])<<10 | + uint64(x[15])<<18 | + uint64(x[16])<<26 | + uint64(x[17])<<34 | + uint64(x[18])<<42 | + uint64(x[19]&1)<<50 + + r[3] = uint64(x[19])>>1 | + uint64(x[20])<<7 | + uint64(x[21])<<15 | + uint64(x[22])<<23 | + uint64(x[23])<<31 | + uint64(x[24])<<39 | + uint64(x[25]&15)<<47 + + r[4] = uint64(x[25])>>4 | + uint64(x[26])<<4 | + uint64(x[27])<<12 | + uint64(x[28])<<20 | + uint64(x[29])<<28 | + uint64(x[30])<<36 | + uint64(x[31]&127)<<44 +} + +// pack sets out = x where out is the usual, little-endian form of the 5, +// 51-bit limbs in x. +func pack(out *[32]byte, x *[5]uint64) { + t := *x + freeze(&t) + + out[0] = byte(t[0]) + out[1] = byte(t[0] >> 8) + out[2] = byte(t[0] >> 16) + out[3] = byte(t[0] >> 24) + out[4] = byte(t[0] >> 32) + out[5] = byte(t[0] >> 40) + out[6] = byte(t[0] >> 48) + + out[6] ^= byte(t[1]<<3) & 0xf8 + out[7] = byte(t[1] >> 5) + out[8] = byte(t[1] >> 13) + out[9] = byte(t[1] >> 21) + out[10] = byte(t[1] >> 29) + out[11] = byte(t[1] >> 37) + out[12] = byte(t[1] >> 45) + + out[12] ^= byte(t[2]<<6) & 0xc0 + out[13] = byte(t[2] >> 2) + out[14] = byte(t[2] >> 10) + out[15] = byte(t[2] >> 18) + out[16] = byte(t[2] >> 26) + out[17] = byte(t[2] >> 34) + out[18] = byte(t[2] >> 42) + out[19] = byte(t[2] >> 50) + + out[19] ^= byte(t[3]<<1) & 0xfe + out[20] = byte(t[3] >> 7) + out[21] = byte(t[3] >> 15) + out[22] = byte(t[3] >> 23) + out[23] = byte(t[3] >> 31) + out[24] = byte(t[3] >> 39) + out[25] = byte(t[3] >> 47) + + out[25] ^= byte(t[4]<<4) & 0xf0 + out[26] = byte(t[4] >> 4) + out[27] = byte(t[4] >> 12) + out[28] = byte(t[4] >> 20) + out[29] = byte(t[4] >> 28) + out[30] = byte(t[4] >> 36) + out[31] = byte(t[4] >> 44) +} + +// invert calculates r = x^-1 mod p using Fermat's little theorem. +func invert(r *[5]uint64, x *[5]uint64) { + var z2, z9, z11, z2_5_0, z2_10_0, z2_20_0, z2_50_0, z2_100_0, t [5]uint64 + + square(&z2, x) /* 2 */ + square(&t, &z2) /* 4 */ + square(&t, &t) /* 8 */ + mul(&z9, &t, x) /* 9 */ + mul(&z11, &z9, &z2) /* 11 */ + square(&t, &z11) /* 22 */ + mul(&z2_5_0, &t, &z9) /* 2^5 - 2^0 = 31 */ + + square(&t, &z2_5_0) /* 2^6 - 2^1 */ + for i := 1; i < 5; i++ { /* 2^20 - 2^10 */ + square(&t, &t) + } + mul(&z2_10_0, &t, &z2_5_0) /* 2^10 - 2^0 */ + + square(&t, &z2_10_0) /* 2^11 - 2^1 */ + for i := 1; i < 10; i++ { /* 2^20 - 2^10 */ + square(&t, &t) + } + mul(&z2_20_0, &t, &z2_10_0) /* 2^20 - 2^0 */ + + square(&t, &z2_20_0) /* 2^21 - 2^1 */ + for i := 1; i < 20; i++ { /* 2^40 - 2^20 */ + square(&t, &t) + } + mul(&t, &t, &z2_20_0) /* 2^40 - 2^0 */ + + square(&t, &t) /* 2^41 - 2^1 */ + for i := 1; i < 10; i++ { /* 2^50 - 2^10 */ + square(&t, &t) + } + mul(&z2_50_0, &t, &z2_10_0) /* 2^50 - 2^0 */ + + square(&t, &z2_50_0) /* 2^51 - 2^1 */ + for i := 1; i < 50; i++ { /* 2^100 - 2^50 */ + square(&t, &t) + } + mul(&z2_100_0, &t, &z2_50_0) /* 2^100 - 2^0 */ + + square(&t, &z2_100_0) /* 2^101 - 2^1 */ + for i := 1; i < 100; i++ { /* 2^200 - 2^100 */ + square(&t, &t) + } + mul(&t, &t, &z2_100_0) /* 2^200 - 2^0 */ + + square(&t, &t) /* 2^201 - 2^1 */ + for i := 1; i < 50; i++ { /* 2^250 - 2^50 */ + square(&t, &t) + } + mul(&t, &t, &z2_50_0) /* 2^250 - 2^0 */ + + square(&t, &t) /* 2^251 - 2^1 */ + square(&t, &t) /* 2^252 - 2^2 */ + square(&t, &t) /* 2^253 - 2^3 */ + + square(&t, &t) /* 2^254 - 2^4 */ + + square(&t, &t) /* 2^255 - 2^5 */ + mul(r, &t, &z11) /* 2^255 - 21 */ +} diff --git a/vendor/github.com/keybase/go-crypto/curve25519/mul_amd64.s b/vendor/github.com/keybase/go-crypto/curve25519/mul_amd64.s new file mode 100644 index 000000000..e48d183ee --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/mul_amd64.s @@ -0,0 +1,191 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This code was translated into a form compatible with 6a from the public +// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html + +// +build amd64,!gccgo,!appengine + +// func mul(dest, a, b *[5]uint64) +TEXT ·mul(SB),0,$128-24 + MOVQ dest+0(FP), DI + MOVQ a+8(FP), SI + MOVQ b+16(FP), DX + + MOVQ SP,R11 + MOVQ $31,CX + NOTQ CX + ANDQ CX,SP + ADDQ $32,SP + + MOVQ R11,0(SP) + MOVQ R12,8(SP) + MOVQ R13,16(SP) + MOVQ R14,24(SP) + MOVQ R15,32(SP) + MOVQ BX,40(SP) + MOVQ BP,48(SP) + MOVQ DI,56(SP) + MOVQ DX,CX + MOVQ 24(SI),DX + IMUL3Q $19,DX,AX + MOVQ AX,64(SP) + MULQ 16(CX) + MOVQ AX,R8 + MOVQ DX,R9 + MOVQ 32(SI),DX + IMUL3Q $19,DX,AX + MOVQ AX,72(SP) + MULQ 8(CX) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 0(SI),AX + MULQ 0(CX) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 0(SI),AX + MULQ 8(CX) + MOVQ AX,R10 + MOVQ DX,R11 + MOVQ 0(SI),AX + MULQ 16(CX) + MOVQ AX,R12 + MOVQ DX,R13 + MOVQ 0(SI),AX + MULQ 24(CX) + MOVQ AX,R14 + MOVQ DX,R15 + MOVQ 0(SI),AX + MULQ 32(CX) + MOVQ AX,BX + MOVQ DX,BP + MOVQ 8(SI),AX + MULQ 0(CX) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 8(SI),AX + MULQ 8(CX) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 8(SI),AX + MULQ 16(CX) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 8(SI),AX + MULQ 24(CX) + ADDQ AX,BX + ADCQ DX,BP + MOVQ 8(SI),DX + IMUL3Q $19,DX,AX + MULQ 32(CX) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 16(SI),AX + MULQ 0(CX) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 16(SI),AX + MULQ 8(CX) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 16(SI),AX + MULQ 16(CX) + ADDQ AX,BX + ADCQ DX,BP + MOVQ 16(SI),DX + IMUL3Q $19,DX,AX + MULQ 24(CX) + ADDQ AX,R8 + ADCQ DX,R9 + MOVQ 16(SI),DX + IMUL3Q $19,DX,AX + MULQ 32(CX) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 24(SI),AX + MULQ 0(CX) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ 24(SI),AX + MULQ 8(CX) + ADDQ AX,BX + ADCQ DX,BP + MOVQ 64(SP),AX + MULQ 24(CX) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 64(SP),AX + MULQ 32(CX) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 32(SI),AX + MULQ 0(CX) + ADDQ AX,BX + ADCQ DX,BP + MOVQ 72(SP),AX + MULQ 16(CX) + ADDQ AX,R10 + ADCQ DX,R11 + MOVQ 72(SP),AX + MULQ 24(CX) + ADDQ AX,R12 + ADCQ DX,R13 + MOVQ 72(SP),AX + MULQ 32(CX) + ADDQ AX,R14 + ADCQ DX,R15 + MOVQ ·REDMASK51(SB),SI + SHLQ $13,R9:R8 + ANDQ SI,R8 + SHLQ $13,R11:R10 + ANDQ SI,R10 + ADDQ R9,R10 + SHLQ $13,R13:R12 + ANDQ SI,R12 + ADDQ R11,R12 + SHLQ $13,R15:R14 + ANDQ SI,R14 + ADDQ R13,R14 + SHLQ $13,BP:BX + ANDQ SI,BX + ADDQ R15,BX + IMUL3Q $19,BP,DX + ADDQ DX,R8 + MOVQ R8,DX + SHRQ $51,DX + ADDQ R10,DX + MOVQ DX,CX + SHRQ $51,DX + ANDQ SI,R8 + ADDQ R12,DX + MOVQ DX,R9 + SHRQ $51,DX + ANDQ SI,CX + ADDQ R14,DX + MOVQ DX,AX + SHRQ $51,DX + ANDQ SI,R9 + ADDQ BX,DX + MOVQ DX,R10 + SHRQ $51,DX + ANDQ SI,AX + IMUL3Q $19,DX,DX + ADDQ DX,R8 + ANDQ SI,R10 + MOVQ R8,0(DI) + MOVQ CX,8(DI) + MOVQ R9,16(DI) + MOVQ AX,24(DI) + MOVQ R10,32(DI) + MOVQ 0(SP),R11 + MOVQ 8(SP),R12 + MOVQ 16(SP),R13 + MOVQ 24(SP),R14 + MOVQ 32(SP),R15 + MOVQ 40(SP),BX + MOVQ 48(SP),BP + MOVQ R11,SP + MOVQ DI,AX + MOVQ SI,DX + RET diff --git a/vendor/github.com/keybase/go-crypto/curve25519/square_amd64.s b/vendor/github.com/keybase/go-crypto/curve25519/square_amd64.s new file mode 100644 index 000000000..78d1a50dd --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/curve25519/square_amd64.s @@ -0,0 +1,153 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This code was translated into a form compatible with 6a from the public +// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html + +// +build amd64,!gccgo,!appengine + +// func square(out, in *[5]uint64) +TEXT ·square(SB),7,$96-16 + MOVQ out+0(FP), DI + MOVQ in+8(FP), SI + + MOVQ SP,R11 + MOVQ $31,CX + NOTQ CX + ANDQ CX,SP + ADDQ $32, SP + + MOVQ R11,0(SP) + MOVQ R12,8(SP) + MOVQ R13,16(SP) + MOVQ R14,24(SP) + MOVQ R15,32(SP) + MOVQ BX,40(SP) + MOVQ BP,48(SP) + MOVQ 0(SI),AX + MULQ 0(SI) + MOVQ AX,CX + MOVQ DX,R8 + MOVQ 0(SI),AX + SHLQ $1,AX + MULQ 8(SI) + MOVQ AX,R9 + MOVQ DX,R10 + MOVQ 0(SI),AX + SHLQ $1,AX + MULQ 16(SI) + MOVQ AX,R11 + MOVQ DX,R12 + MOVQ 0(SI),AX + SHLQ $1,AX + MULQ 24(SI) + MOVQ AX,R13 + MOVQ DX,R14 + MOVQ 0(SI),AX + SHLQ $1,AX + MULQ 32(SI) + MOVQ AX,R15 + MOVQ DX,BX + MOVQ 8(SI),AX + MULQ 8(SI) + ADDQ AX,R11 + ADCQ DX,R12 + MOVQ 8(SI),AX + SHLQ $1,AX + MULQ 16(SI) + ADDQ AX,R13 + ADCQ DX,R14 + MOVQ 8(SI),AX + SHLQ $1,AX + MULQ 24(SI) + ADDQ AX,R15 + ADCQ DX,BX + MOVQ 8(SI),DX + IMUL3Q $38,DX,AX + MULQ 32(SI) + ADDQ AX,CX + ADCQ DX,R8 + MOVQ 16(SI),AX + MULQ 16(SI) + ADDQ AX,R15 + ADCQ DX,BX + MOVQ 16(SI),DX + IMUL3Q $38,DX,AX + MULQ 24(SI) + ADDQ AX,CX + ADCQ DX,R8 + MOVQ 16(SI),DX + IMUL3Q $38,DX,AX + MULQ 32(SI) + ADDQ AX,R9 + ADCQ DX,R10 + MOVQ 24(SI),DX + IMUL3Q $19,DX,AX + MULQ 24(SI) + ADDQ AX,R9 + ADCQ DX,R10 + MOVQ 24(SI),DX + IMUL3Q $38,DX,AX + MULQ 32(SI) + ADDQ AX,R11 + ADCQ DX,R12 + MOVQ 32(SI),DX + IMUL3Q $19,DX,AX + MULQ 32(SI) + ADDQ AX,R13 + ADCQ DX,R14 + MOVQ ·REDMASK51(SB),SI + SHLQ $13,R8:CX + ANDQ SI,CX + SHLQ $13,R10:R9 + ANDQ SI,R9 + ADDQ R8,R9 + SHLQ $13,R12:R11 + ANDQ SI,R11 + ADDQ R10,R11 + SHLQ $13,R14:R13 + ANDQ SI,R13 + ADDQ R12,R13 + SHLQ $13,BX:R15 + ANDQ SI,R15 + ADDQ R14,R15 + IMUL3Q $19,BX,DX + ADDQ DX,CX + MOVQ CX,DX + SHRQ $51,DX + ADDQ R9,DX + ANDQ SI,CX + MOVQ DX,R8 + SHRQ $51,DX + ADDQ R11,DX + ANDQ SI,R8 + MOVQ DX,R9 + SHRQ $51,DX + ADDQ R13,DX + ANDQ SI,R9 + MOVQ DX,AX + SHRQ $51,DX + ADDQ R15,DX + ANDQ SI,AX + MOVQ DX,R10 + SHRQ $51,DX + IMUL3Q $19,DX,DX + ADDQ DX,CX + ANDQ SI,R10 + MOVQ CX,0(DI) + MOVQ R8,8(DI) + MOVQ R9,16(DI) + MOVQ AX,24(DI) + MOVQ R10,32(DI) + MOVQ 0(SP),R11 + MOVQ 8(SP),R12 + MOVQ 16(SP),R13 + MOVQ 24(SP),R14 + MOVQ 32(SP),R15 + MOVQ 40(SP),BX + MOVQ 48(SP),BP + MOVQ R11,SP + MOVQ DI,AX + MOVQ SI,DX + RET diff --git a/vendor/github.com/keybase/go-crypto/ed25519/ed25519.go b/vendor/github.com/keybase/go-crypto/ed25519/ed25519.go new file mode 100644 index 000000000..9c7a88807 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/ed25519/ed25519.go @@ -0,0 +1,181 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package ed25519 implements the Ed25519 signature algorithm. See +// http://ed25519.cr.yp.to/. +// +// These functions are also compatible with the “Ed25519” function defined in +// https://tools.ietf.org/html/draft-irtf-cfrg-eddsa-05. +package ed25519 + +// This code is a port of the public domain, “ref10” implementation of ed25519 +// from SUPERCOP. + +import ( + "crypto" + cryptorand "crypto/rand" + "crypto/sha512" + "crypto/subtle" + "errors" + "io" + "strconv" + + "github.com/keybase/go-crypto/ed25519/internal/edwards25519" +) + +const ( + // PublicKeySize is the size, in bytes, of public keys as used in this package. + PublicKeySize = 32 + // PrivateKeySize is the size, in bytes, of private keys as used in this package. + PrivateKeySize = 64 + // SignatureSize is the size, in bytes, of signatures generated and verified by this package. + SignatureSize = 64 +) + +// PublicKey is the type of Ed25519 public keys. +type PublicKey []byte + +// PrivateKey is the type of Ed25519 private keys. It implements crypto.Signer. +type PrivateKey []byte + +// Public returns the PublicKey corresponding to priv. +func (priv PrivateKey) Public() crypto.PublicKey { + publicKey := make([]byte, PublicKeySize) + copy(publicKey, priv[32:]) + return PublicKey(publicKey) +} + +// Sign signs the given message with priv. +// Ed25519 performs two passes over messages to be signed and therefore cannot +// handle pre-hashed messages. Thus opts.HashFunc() must return zero to +// indicate the message hasn't been hashed. This can be achieved by passing +// crypto.Hash(0) as the value for opts. +func (priv PrivateKey) Sign(rand io.Reader, message []byte, opts crypto.SignerOpts) (signature []byte, err error) { + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("ed25519: cannot sign hashed message") + } + + return Sign(priv, message), nil +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (publicKey PublicKey, privateKey PrivateKey, err error) { + if rand == nil { + rand = cryptorand.Reader + } + + privateKey = make([]byte, PrivateKeySize) + publicKey = make([]byte, PublicKeySize) + _, err = io.ReadFull(rand, privateKey[:32]) + if err != nil { + return nil, nil, err + } + + digest := sha512.Sum512(privateKey[:32]) + digest[0] &= 248 + digest[31] &= 127 + digest[31] |= 64 + + var A edwards25519.ExtendedGroupElement + var hBytes [32]byte + copy(hBytes[:], digest[:]) + edwards25519.GeScalarMultBase(&A, &hBytes) + var publicKeyBytes [32]byte + A.ToBytes(&publicKeyBytes) + + copy(privateKey[32:], publicKeyBytes[:]) + copy(publicKey, publicKeyBytes[:]) + + return publicKey, privateKey, nil +} + +// Sign signs the message with privateKey and returns a signature. It will +// panic if len(privateKey) is not PrivateKeySize. +func Sign(privateKey PrivateKey, message []byte) []byte { + if l := len(privateKey); l != PrivateKeySize { + panic("ed25519: bad private key length: " + strconv.Itoa(l)) + } + + h := sha512.New() + h.Write(privateKey[:32]) + + var digest1, messageDigest, hramDigest [64]byte + var expandedSecretKey [32]byte + h.Sum(digest1[:0]) + copy(expandedSecretKey[:], digest1[:]) + expandedSecretKey[0] &= 248 + expandedSecretKey[31] &= 63 + expandedSecretKey[31] |= 64 + + h.Reset() + h.Write(digest1[32:]) + h.Write(message) + h.Sum(messageDigest[:0]) + + var messageDigestReduced [32]byte + edwards25519.ScReduce(&messageDigestReduced, &messageDigest) + var R edwards25519.ExtendedGroupElement + edwards25519.GeScalarMultBase(&R, &messageDigestReduced) + + var encodedR [32]byte + R.ToBytes(&encodedR) + + h.Reset() + h.Write(encodedR[:]) + h.Write(privateKey[32:]) + h.Write(message) + h.Sum(hramDigest[:0]) + var hramDigestReduced [32]byte + edwards25519.ScReduce(&hramDigestReduced, &hramDigest) + + var s [32]byte + edwards25519.ScMulAdd(&s, &hramDigestReduced, &expandedSecretKey, &messageDigestReduced) + + signature := make([]byte, SignatureSize) + copy(signature[:], encodedR[:]) + copy(signature[32:], s[:]) + + return signature +} + +// Verify reports whether sig is a valid signature of message by publicKey. It +// will panic if len(publicKey) is not PublicKeySize. +func Verify(publicKey PublicKey, message, sig []byte) bool { + if l := len(publicKey); l != PublicKeySize { + panic("ed25519: bad public key length: " + strconv.Itoa(l)) + } + + if len(sig) != SignatureSize || sig[63]&224 != 0 { + return false + } + + var A edwards25519.ExtendedGroupElement + var publicKeyBytes [32]byte + copy(publicKeyBytes[:], publicKey) + if !A.FromBytes(&publicKeyBytes) { + return false + } + edwards25519.FeNeg(&A.X, &A.X) + edwards25519.FeNeg(&A.T, &A.T) + + h := sha512.New() + h.Write(sig[:32]) + h.Write(publicKey[:]) + h.Write(message) + var digest [64]byte + h.Sum(digest[:0]) + + var hReduced [32]byte + edwards25519.ScReduce(&hReduced, &digest) + + var R edwards25519.ProjectiveGroupElement + var b [32]byte + copy(b[:], sig[32:]) + edwards25519.GeDoubleScalarMultVartime(&R, &hReduced, &A, &b) + + var checkR [32]byte + R.ToBytes(&checkR) + return subtle.ConstantTimeCompare(sig[:32], checkR[:]) == 1 +} diff --git a/vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/const.go b/vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/const.go new file mode 100644 index 000000000..e39f086c1 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/const.go @@ -0,0 +1,1422 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package edwards25519 + +// These values are from the public domain, “ref10” implementation of ed25519 +// from SUPERCOP. + +// d is a constant in the Edwards curve equation. +var d = FieldElement{ + -10913610, 13857413, -15372611, 6949391, 114729, -8787816, -6275908, -3247719, -18696448, -12055116, +} + +// d2 is 2*d. +var d2 = FieldElement{ + -21827239, -5839606, -30745221, 13898782, 229458, 15978800, -12551817, -6495438, 29715968, 9444199, +} + +// SqrtM1 is the square-root of -1 in the field. +var SqrtM1 = FieldElement{ + -32595792, -7943725, 9377950, 3500415, 12389472, -272473, -25146209, -2005654, 326686, 11406482, +} + +// A is a constant in the Montgomery-form of curve25519. +var A = FieldElement{ + 486662, 0, 0, 0, 0, 0, 0, 0, 0, 0, +} + +// bi contains precomputed multiples of the base-point. See the Ed25519 paper +// for a discussion about how these values are used. +var bi = [8]PreComputedGroupElement{ + { + FieldElement{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605}, + FieldElement{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378}, + FieldElement{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546}, + }, + { + FieldElement{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024}, + FieldElement{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574}, + FieldElement{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357}, + }, + { + FieldElement{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380}, + FieldElement{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306}, + FieldElement{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942}, + }, + { + FieldElement{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766}, + FieldElement{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701}, + FieldElement{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300}, + }, + { + FieldElement{-22518993, -6692182, 14201702, -8745502, -23510406, 8844726, 18474211, -1361450, -13062696, 13821877}, + FieldElement{-6455177, -7839871, 3374702, -4740862, -27098617, -10571707, 31655028, -7212327, 18853322, -14220951}, + FieldElement{4566830, -12963868, -28974889, -12240689, -7602672, -2830569, -8514358, -10431137, 2207753, -3209784}, + }, + { + FieldElement{-25154831, -4185821, 29681144, 7868801, -6854661, -9423865, -12437364, -663000, -31111463, -16132436}, + FieldElement{25576264, -2703214, 7349804, -11814844, 16472782, 9300885, 3844789, 15725684, 171356, 6466918}, + FieldElement{23103977, 13316479, 9739013, -16149481, 817875, -15038942, 8965339, -14088058, -30714912, 16193877}, + }, + { + FieldElement{-33521811, 3180713, -2394130, 14003687, -16903474, -16270840, 17238398, 4729455, -18074513, 9256800}, + FieldElement{-25182317, -4174131, 32336398, 5036987, -21236817, 11360617, 22616405, 9761698, -19827198, 630305}, + FieldElement{-13720693, 2639453, -24237460, -7406481, 9494427, -5774029, -6554551, -15960994, -2449256, -14291300}, + }, + { + FieldElement{-3151181, -5046075, 9282714, 6866145, -31907062, -863023, -18940575, 15033784, 25105118, -7894876}, + FieldElement{-24326370, 15950226, -31801215, -14592823, -11662737, -5090925, 1573892, -2625887, 2198790, -15804619}, + FieldElement{-3099351, 10324967, -2241613, 7453183, -5446979, -2735503, -13812022, -16236442, -32461234, -12290683}, + }, +} + +// base contains precomputed multiples of the base-point. See the Ed25519 paper +// for a discussion about how these values are used. +var base = [32][8]PreComputedGroupElement{ + { + { + FieldElement{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605}, + FieldElement{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378}, + FieldElement{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546}, + }, + { + FieldElement{-12815894, -12976347, -21581243, 11784320, -25355658, -2750717, -11717903, -3814571, -358445, -10211303}, + FieldElement{-21703237, 6903825, 27185491, 6451973, -29577724, -9554005, -15616551, 11189268, -26829678, -5319081}, + FieldElement{26966642, 11152617, 32442495, 15396054, 14353839, -12752335, -3128826, -9541118, -15472047, -4166697}, + }, + { + FieldElement{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024}, + FieldElement{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574}, + FieldElement{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357}, + }, + { + FieldElement{-17036878, 13921892, 10945806, -6033431, 27105052, -16084379, -28926210, 15006023, 3284568, -6276540}, + FieldElement{23599295, -8306047, -11193664, -7687416, 13236774, 10506355, 7464579, 9656445, 13059162, 10374397}, + FieldElement{7798556, 16710257, 3033922, 2874086, 28997861, 2835604, 32406664, -3839045, -641708, -101325}, + }, + { + FieldElement{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380}, + FieldElement{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306}, + FieldElement{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942}, + }, + { + FieldElement{-15371964, -12862754, 32573250, 4720197, -26436522, 5875511, -19188627, -15224819, -9818940, -12085777}, + FieldElement{-8549212, 109983, 15149363, 2178705, 22900618, 4543417, 3044240, -15689887, 1762328, 14866737}, + FieldElement{-18199695, -15951423, -10473290, 1707278, -17185920, 3916101, -28236412, 3959421, 27914454, 4383652}, + }, + { + FieldElement{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766}, + FieldElement{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701}, + FieldElement{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300}, + }, + { + FieldElement{14499471, -2729599, -33191113, -4254652, 28494862, 14271267, 30290735, 10876454, -33154098, 2381726}, + FieldElement{-7195431, -2655363, -14730155, 462251, -27724326, 3941372, -6236617, 3696005, -32300832, 15351955}, + FieldElement{27431194, 8222322, 16448760, -3907995, -18707002, 11938355, -32961401, -2970515, 29551813, 10109425}, + }, + }, + { + { + FieldElement{-13657040, -13155431, -31283750, 11777098, 21447386, 6519384, -2378284, -1627556, 10092783, -4764171}, + FieldElement{27939166, 14210322, 4677035, 16277044, -22964462, -12398139, -32508754, 12005538, -17810127, 12803510}, + FieldElement{17228999, -15661624, -1233527, 300140, -1224870, -11714777, 30364213, -9038194, 18016357, 4397660}, + }, + { + FieldElement{-10958843, -7690207, 4776341, -14954238, 27850028, -15602212, -26619106, 14544525, -17477504, 982639}, + FieldElement{29253598, 15796703, -2863982, -9908884, 10057023, 3163536, 7332899, -4120128, -21047696, 9934963}, + FieldElement{5793303, 16271923, -24131614, -10116404, 29188560, 1206517, -14747930, 4559895, -30123922, -10897950}, + }, + { + FieldElement{-27643952, -11493006, 16282657, -11036493, 28414021, -15012264, 24191034, 4541697, -13338309, 5500568}, + FieldElement{12650548, -1497113, 9052871, 11355358, -17680037, -8400164, -17430592, 12264343, 10874051, 13524335}, + FieldElement{25556948, -3045990, 714651, 2510400, 23394682, -10415330, 33119038, 5080568, -22528059, 5376628}, + }, + { + FieldElement{-26088264, -4011052, -17013699, -3537628, -6726793, 1920897, -22321305, -9447443, 4535768, 1569007}, + FieldElement{-2255422, 14606630, -21692440, -8039818, 28430649, 8775819, -30494562, 3044290, 31848280, 12543772}, + FieldElement{-22028579, 2943893, -31857513, 6777306, 13784462, -4292203, -27377195, -2062731, 7718482, 14474653}, + }, + { + FieldElement{2385315, 2454213, -22631320, 46603, -4437935, -15680415, 656965, -7236665, 24316168, -5253567}, + FieldElement{13741529, 10911568, -33233417, -8603737, -20177830, -1033297, 33040651, -13424532, -20729456, 8321686}, + FieldElement{21060490, -2212744, 15712757, -4336099, 1639040, 10656336, 23845965, -11874838, -9984458, 608372}, + }, + { + FieldElement{-13672732, -15087586, -10889693, -7557059, -6036909, 11305547, 1123968, -6780577, 27229399, 23887}, + FieldElement{-23244140, -294205, -11744728, 14712571, -29465699, -2029617, 12797024, -6440308, -1633405, 16678954}, + FieldElement{-29500620, 4770662, -16054387, 14001338, 7830047, 9564805, -1508144, -4795045, -17169265, 4904953}, + }, + { + FieldElement{24059557, 14617003, 19037157, -15039908, 19766093, -14906429, 5169211, 16191880, 2128236, -4326833}, + FieldElement{-16981152, 4124966, -8540610, -10653797, 30336522, -14105247, -29806336, 916033, -6882542, -2986532}, + FieldElement{-22630907, 12419372, -7134229, -7473371, -16478904, 16739175, 285431, 2763829, 15736322, 4143876}, + }, + { + FieldElement{2379352, 11839345, -4110402, -5988665, 11274298, 794957, 212801, -14594663, 23527084, -16458268}, + FieldElement{33431127, -11130478, -17838966, -15626900, 8909499, 8376530, -32625340, 4087881, -15188911, -14416214}, + FieldElement{1767683, 7197987, -13205226, -2022635, -13091350, 448826, 5799055, 4357868, -4774191, -16323038}, + }, + }, + { + { + FieldElement{6721966, 13833823, -23523388, -1551314, 26354293, -11863321, 23365147, -3949732, 7390890, 2759800}, + FieldElement{4409041, 2052381, 23373853, 10530217, 7676779, -12885954, 21302353, -4264057, 1244380, -12919645}, + FieldElement{-4421239, 7169619, 4982368, -2957590, 30256825, -2777540, 14086413, 9208236, 15886429, 16489664}, + }, + { + FieldElement{1996075, 10375649, 14346367, 13311202, -6874135, -16438411, -13693198, 398369, -30606455, -712933}, + FieldElement{-25307465, 9795880, -2777414, 14878809, -33531835, 14780363, 13348553, 12076947, -30836462, 5113182}, + FieldElement{-17770784, 11797796, 31950843, 13929123, -25888302, 12288344, -30341101, -7336386, 13847711, 5387222}, + }, + { + FieldElement{-18582163, -3416217, 17824843, -2340966, 22744343, -10442611, 8763061, 3617786, -19600662, 10370991}, + FieldElement{20246567, -14369378, 22358229, -543712, 18507283, -10413996, 14554437, -8746092, 32232924, 16763880}, + FieldElement{9648505, 10094563, 26416693, 14745928, -30374318, -6472621, 11094161, 15689506, 3140038, -16510092}, + }, + { + FieldElement{-16160072, 5472695, 31895588, 4744994, 8823515, 10365685, -27224800, 9448613, -28774454, 366295}, + FieldElement{19153450, 11523972, -11096490, -6503142, -24647631, 5420647, 28344573, 8041113, 719605, 11671788}, + FieldElement{8678025, 2694440, -6808014, 2517372, 4964326, 11152271, -15432916, -15266516, 27000813, -10195553}, + }, + { + FieldElement{-15157904, 7134312, 8639287, -2814877, -7235688, 10421742, 564065, 5336097, 6750977, -14521026}, + FieldElement{11836410, -3979488, 26297894, 16080799, 23455045, 15735944, 1695823, -8819122, 8169720, 16220347}, + FieldElement{-18115838, 8653647, 17578566, -6092619, -8025777, -16012763, -11144307, -2627664, -5990708, -14166033}, + }, + { + FieldElement{-23308498, -10968312, 15213228, -10081214, -30853605, -11050004, 27884329, 2847284, 2655861, 1738395}, + FieldElement{-27537433, -14253021, -25336301, -8002780, -9370762, 8129821, 21651608, -3239336, -19087449, -11005278}, + FieldElement{1533110, 3437855, 23735889, 459276, 29970501, 11335377, 26030092, 5821408, 10478196, 8544890}, + }, + { + FieldElement{32173121, -16129311, 24896207, 3921497, 22579056, -3410854, 19270449, 12217473, 17789017, -3395995}, + FieldElement{-30552961, -2228401, -15578829, -10147201, 13243889, 517024, 15479401, -3853233, 30460520, 1052596}, + FieldElement{-11614875, 13323618, 32618793, 8175907, -15230173, 12596687, 27491595, -4612359, 3179268, -9478891}, + }, + { + FieldElement{31947069, -14366651, -4640583, -15339921, -15125977, -6039709, -14756777, -16411740, 19072640, -9511060}, + FieldElement{11685058, 11822410, 3158003, -13952594, 33402194, -4165066, 5977896, -5215017, 473099, 5040608}, + FieldElement{-20290863, 8198642, -27410132, 11602123, 1290375, -2799760, 28326862, 1721092, -19558642, -3131606}, + }, + }, + { + { + FieldElement{7881532, 10687937, 7578723, 7738378, -18951012, -2553952, 21820786, 8076149, -27868496, 11538389}, + FieldElement{-19935666, 3899861, 18283497, -6801568, -15728660, -11249211, 8754525, 7446702, -5676054, 5797016}, + FieldElement{-11295600, -3793569, -15782110, -7964573, 12708869, -8456199, 2014099, -9050574, -2369172, -5877341}, + }, + { + FieldElement{-22472376, -11568741, -27682020, 1146375, 18956691, 16640559, 1192730, -3714199, 15123619, 10811505}, + FieldElement{14352098, -3419715, -18942044, 10822655, 32750596, 4699007, -70363, 15776356, -28886779, -11974553}, + FieldElement{-28241164, -8072475, -4978962, -5315317, 29416931, 1847569, -20654173, -16484855, 4714547, -9600655}, + }, + { + FieldElement{15200332, 8368572, 19679101, 15970074, -31872674, 1959451, 24611599, -4543832, -11745876, 12340220}, + FieldElement{12876937, -10480056, 33134381, 6590940, -6307776, 14872440, 9613953, 8241152, 15370987, 9608631}, + FieldElement{-4143277, -12014408, 8446281, -391603, 4407738, 13629032, -7724868, 15866074, -28210621, -8814099}, + }, + { + FieldElement{26660628, -15677655, 8393734, 358047, -7401291, 992988, -23904233, 858697, 20571223, 8420556}, + FieldElement{14620715, 13067227, -15447274, 8264467, 14106269, 15080814, 33531827, 12516406, -21574435, -12476749}, + FieldElement{236881, 10476226, 57258, -14677024, 6472998, 2466984, 17258519, 7256740, 8791136, 15069930}, + }, + { + FieldElement{1276410, -9371918, 22949635, -16322807, -23493039, -5702186, 14711875, 4874229, -30663140, -2331391}, + FieldElement{5855666, 4990204, -13711848, 7294284, -7804282, 1924647, -1423175, -7912378, -33069337, 9234253}, + FieldElement{20590503, -9018988, 31529744, -7352666, -2706834, 10650548, 31559055, -11609587, 18979186, 13396066}, + }, + { + FieldElement{24474287, 4968103, 22267082, 4407354, 24063882, -8325180, -18816887, 13594782, 33514650, 7021958}, + FieldElement{-11566906, -6565505, -21365085, 15928892, -26158305, 4315421, -25948728, -3916677, -21480480, 12868082}, + FieldElement{-28635013, 13504661, 19988037, -2132761, 21078225, 6443208, -21446107, 2244500, -12455797, -8089383}, + }, + { + FieldElement{-30595528, 13793479, -5852820, 319136, -25723172, -6263899, 33086546, 8957937, -15233648, 5540521}, + FieldElement{-11630176, -11503902, -8119500, -7643073, 2620056, 1022908, -23710744, -1568984, -16128528, -14962807}, + FieldElement{23152971, 775386, 27395463, 14006635, -9701118, 4649512, 1689819, 892185, -11513277, -15205948}, + }, + { + FieldElement{9770129, 9586738, 26496094, 4324120, 1556511, -3550024, 27453819, 4763127, -19179614, 5867134}, + FieldElement{-32765025, 1927590, 31726409, -4753295, 23962434, -16019500, 27846559, 5931263, -29749703, -16108455}, + FieldElement{27461885, -2977536, 22380810, 1815854, -23033753, -3031938, 7283490, -15148073, -19526700, 7734629}, + }, + }, + { + { + FieldElement{-8010264, -9590817, -11120403, 6196038, 29344158, -13430885, 7585295, -3176626, 18549497, 15302069}, + FieldElement{-32658337, -6171222, -7672793, -11051681, 6258878, 13504381, 10458790, -6418461, -8872242, 8424746}, + FieldElement{24687205, 8613276, -30667046, -3233545, 1863892, -1830544, 19206234, 7134917, -11284482, -828919}, + }, + { + FieldElement{11334899, -9218022, 8025293, 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8561328, -20155687, -11632979, -14754271, -10812892}, + }, + { + FieldElement{15961858, 14150409, 26716931, -665832, -22794328, 13603569, 11829573, 7467844, -28822128, 929275}, + FieldElement{11038231, -11582396, -27310482, -7316562, -10498527, -16307831, -23479533, -9371869, -21393143, 2465074}, + FieldElement{20017163, -4323226, 27915242, 1529148, 12396362, 15675764, 13817261, -9658066, 2463391, -4622140}, + }, + { + FieldElement{-16358878, -12663911, -12065183, 4996454, -1256422, 1073572, 9583558, 12851107, 4003896, 12673717}, + FieldElement{-1731589, -15155870, -3262930, 16143082, 19294135, 13385325, 14741514, -9103726, 7903886, 2348101}, + FieldElement{24536016, -16515207, 12715592, -3862155, 1511293, 10047386, -3842346, -7129159, -28377538, 10048127}, + }, + }, + { + { + FieldElement{-12622226, -6204820, 30718825, 2591312, -10617028, 12192840, 18873298, -7297090, -32297756, 15221632}, + FieldElement{-26478122, -11103864, 11546244, -1852483, 9180880, 7656409, -21343950, 2095755, 29769758, 6593415}, + FieldElement{-31994208, -2907461, 4176912, 3264766, 12538965, -868111, 26312345, -6118678, 30958054, 8292160}, + }, + { + FieldElement{31429822, -13959116, 29173532, 15632448, 12174511, -2760094, 32808831, 3977186, 26143136, -3148876}, + FieldElement{22648901, 1402143, -22799984, 13746059, 7936347, 365344, -8668633, -1674433, -3758243, -2304625}, + FieldElement{-15491917, 8012313, -2514730, -12702462, -23965846, -10254029, -1612713, -1535569, -16664475, 8194478}, + }, + { + FieldElement{27338066, -7507420, -7414224, 10140405, -19026427, -6589889, 27277191, 8855376, 28572286, 3005164}, + FieldElement{26287124, 4821776, 25476601, -4145903, -3764513, -15788984, -18008582, 1182479, -26094821, -13079595}, + FieldElement{-7171154, 3178080, 23970071, 6201893, -17195577, -4489192, -21876275, -13982627, 32208683, -1198248}, + }, + { + FieldElement{-16657702, 2817643, -10286362, 14811298, 6024667, 13349505, -27315504, -10497842, -27672585, -11539858}, + FieldElement{15941029, -9405932, -21367050, 8062055, 31876073, -238629, -15278393, -1444429, 15397331, -4130193}, + FieldElement{8934485, -13485467, -23286397, -13423241, -32446090, 14047986, 31170398, -1441021, -27505566, 15087184}, + }, + { + FieldElement{-18357243, -2156491, 24524913, -16677868, 15520427, -6360776, -15502406, 11461896, 16788528, -5868942}, + FieldElement{-1947386, 16013773, 21750665, 3714552, -17401782, -16055433, -3770287, -10323320, 31322514, -11615635}, + FieldElement{21426655, -5650218, -13648287, -5347537, -28812189, -4920970, -18275391, -14621414, 13040862, -12112948}, + }, + { + FieldElement{11293895, 12478086, -27136401, 15083750, -29307421, 14748872, 14555558, -13417103, 1613711, 4896935}, + FieldElement{-25894883, 15323294, -8489791, -8057900, 25967126, -13425460, 2825960, -4897045, -23971776, -11267415}, + FieldElement{-15924766, -5229880, -17443532, 6410664, 3622847, 10243618, 20615400, 12405433, -23753030, -8436416}, + }, + { + FieldElement{-7091295, 12556208, -20191352, 9025187, -17072479, 4333801, 4378436, 2432030, 23097949, -566018}, + FieldElement{4565804, -16025654, 20084412, -7842817, 1724999, 189254, 24767264, 10103221, -18512313, 2424778}, + FieldElement{366633, -11976806, 8173090, -6890119, 30788634, 5745705, -7168678, 1344109, -3642553, 12412659}, + }, + { + FieldElement{-24001791, 7690286, 14929416, -168257, -32210835, -13412986, 24162697, -15326504, -3141501, 11179385}, + FieldElement{18289522, -14724954, 8056945, 16430056, -21729724, 7842514, -6001441, -1486897, -18684645, -11443503}, + FieldElement{476239, 6601091, -6152790, -9723375, 17503545, -4863900, 27672959, 13403813, 11052904, 5219329}, + }, + }, + { + { + FieldElement{20678546, -8375738, -32671898, 8849123, -5009758, 14574752, 31186971, -3973730, 9014762, -8579056}, + FieldElement{-13644050, -10350239, -15962508, 5075808, -1514661, -11534600, -33102500, 9160280, 8473550, -3256838}, + FieldElement{24900749, 14435722, 17209120, -15292541, -22592275, 9878983, -7689309, -16335821, -24568481, 11788948}, + }, + { + FieldElement{-3118155, -11395194, -13802089, 14797441, 9652448, -6845904, -20037437, 10410733, -24568470, -1458691}, + FieldElement{-15659161, 16736706, -22467150, 10215878, -9097177, 7563911, 11871841, -12505194, -18513325, 8464118}, + FieldElement{-23400612, 8348507, -14585951, -861714, -3950205, -6373419, 14325289, 8628612, 33313881, -8370517}, + }, + { + FieldElement{-20186973, -4967935, 22367356, 5271547, -1097117, -4788838, -24805667, -10236854, -8940735, -5818269}, + FieldElement{-6948785, -1795212, -32625683, -16021179, 32635414, -7374245, 15989197, -12838188, 28358192, -4253904}, + FieldElement{-23561781, -2799059, -32351682, -1661963, -9147719, 10429267, -16637684, 4072016, -5351664, 5596589}, + }, + { + FieldElement{-28236598, -3390048, 12312896, 6213178, 3117142, 16078565, 29266239, 2557221, 1768301, 15373193}, + FieldElement{-7243358, -3246960, -4593467, -7553353, -127927, -912245, -1090902, -4504991, -24660491, 3442910}, + FieldElement{-30210571, 5124043, 14181784, 8197961, 18964734, -11939093, 22597931, 7176455, -18585478, 13365930}, + }, + { + FieldElement{-7877390, -1499958, 8324673, 4690079, 6261860, 890446, 24538107, -8570186, -9689599, -3031667}, + FieldElement{25008904, -10771599, -4305031, -9638010, 16265036, 15721635, 683793, -11823784, 15723479, -15163481}, + FieldElement{-9660625, 12374379, -27006999, -7026148, -7724114, -12314514, 11879682, 5400171, 519526, -1235876}, + }, + { + FieldElement{22258397, -16332233, -7869817, 14613016, -22520255, -2950923, -20353881, 7315967, 16648397, 7605640}, + FieldElement{-8081308, -8464597, -8223311, 9719710, 19259459, -15348212, 23994942, -5281555, -9468848, 4763278}, + FieldElement{-21699244, 9220969, -15730624, 1084137, -25476107, -2852390, 31088447, -7764523, -11356529, 728112}, + }, + { + FieldElement{26047220, -11751471, -6900323, -16521798, 24092068, 9158119, -4273545, -12555558, -29365436, -5498272}, + FieldElement{17510331, -322857, 5854289, 8403524, 17133918, -3112612, -28111007, 12327945, 10750447, 10014012}, + FieldElement{-10312768, 3936952, 9156313, -8897683, 16498692, -994647, -27481051, -666732, 3424691, 7540221}, + }, + { + FieldElement{30322361, -6964110, 11361005, -4143317, 7433304, 4989748, -7071422, -16317219, -9244265, 15258046}, + FieldElement{13054562, -2779497, 19155474, 469045, -12482797, 4566042, 5631406, 2711395, 1062915, -5136345}, + FieldElement{-19240248, -11254599, -29509029, -7499965, -5835763, 13005411, -6066489, 12194497, 32960380, 1459310}, + }, + }, + { + { + FieldElement{19852034, 7027924, 23669353, 10020366, 8586503, -6657907, 394197, -6101885, 18638003, -11174937}, + FieldElement{31395534, 15098109, 26581030, 8030562, -16527914, -5007134, 9012486, -7584354, -6643087, -5442636}, + FieldElement{-9192165, -2347377, -1997099, 4529534, 25766844, 607986, -13222, 9677543, -32294889, -6456008}, + }, + { + FieldElement{-2444496, -149937, 29348902, 8186665, 1873760, 12489863, -30934579, -7839692, -7852844, -8138429}, + FieldElement{-15236356, -15433509, 7766470, 746860, 26346930, -10221762, -27333451, 10754588, -9431476, 5203576}, + FieldElement{31834314, 14135496, -770007, 5159118, 20917671, -16768096, -7467973, -7337524, 31809243, 7347066}, + }, + { + FieldElement{-9606723, -11874240, 20414459, 13033986, 13716524, -11691881, 19797970, -12211255, 15192876, -2087490}, + FieldElement{-12663563, -2181719, 1168162, -3804809, 26747877, -14138091, 10609330, 12694420, 33473243, -13382104}, + FieldElement{33184999, 11180355, 15832085, -11385430, -1633671, 225884, 15089336, -11023903, -6135662, 14480053}, + }, + { + FieldElement{31308717, -5619998, 31030840, -1897099, 15674547, -6582883, 5496208, 13685227, 27595050, 8737275}, + FieldElement{-20318852, -15150239, 10933843, -16178022, 8335352, -7546022, -31008351, -12610604, 26498114, 66511}, + FieldElement{22644454, -8761729, -16671776, 4884562, -3105614, -13559366, 30540766, -4286747, -13327787, -7515095}, + }, + { + FieldElement{-28017847, 9834845, 18617207, -2681312, -3401956, -13307506, 8205540, 13585437, -17127465, 15115439}, + FieldElement{23711543, -672915, 31206561, -8362711, 6164647, -9709987, -33535882, -1426096, 8236921, 16492939}, + FieldElement{-23910559, -13515526, -26299483, -4503841, 25005590, -7687270, 19574902, 10071562, 6708380, -6222424}, + }, + { + FieldElement{2101391, -4930054, 19702731, 2367575, -15427167, 1047675, 5301017, 9328700, 29955601, -11678310}, + FieldElement{3096359, 9271816, -21620864, -15521844, -14847996, -7592937, -25892142, -12635595, -9917575, 6216608}, + FieldElement{-32615849, 338663, -25195611, 2510422, -29213566, -13820213, 24822830, -6146567, -26767480, 7525079}, + }, + { + FieldElement{-23066649, -13985623, 16133487, -7896178, -3389565, 778788, -910336, -2782495, -19386633, 11994101}, + FieldElement{21691500, -13624626, -641331, -14367021, 3285881, -3483596, -25064666, 9718258, -7477437, 13381418}, + FieldElement{18445390, -4202236, 14979846, 11622458, -1727110, -3582980, 23111648, -6375247, 28535282, 15779576}, + }, + { + FieldElement{30098053, 3089662, -9234387, 16662135, -21306940, 11308411, -14068454, 12021730, 9955285, -16303356}, + FieldElement{9734894, -14576830, -7473633, -9138735, 2060392, 11313496, -18426029, 9924399, 20194861, 13380996}, + FieldElement{-26378102, -7965207, -22167821, 15789297, -18055342, -6168792, -1984914, 15707771, 26342023, 10146099}, + }, + }, + { + { + FieldElement{-26016874, -219943, 21339191, -41388, 19745256, -2878700, -29637280, 2227040, 21612326, -545728}, + FieldElement{-13077387, 1184228, 23562814, -5970442, -20351244, -6348714, 25764461, 12243797, -20856566, 11649658}, + FieldElement{-10031494, 11262626, 27384172, 2271902, 26947504, -15997771, 39944, 6114064, 33514190, 2333242}, + }, + { + FieldElement{-21433588, -12421821, 8119782, 7219913, -21830522, -9016134, -6679750, -12670638, 24350578, -13450001}, + FieldElement{-4116307, -11271533, -23886186, 4843615, -30088339, 690623, -31536088, -10406836, 8317860, 12352766}, + FieldElement{18200138, -14475911, -33087759, -2696619, -23702521, -9102511, -23552096, -2287550, 20712163, 6719373}, + }, + { + FieldElement{26656208, 6075253, -7858556, 1886072, -28344043, 4262326, 11117530, -3763210, 26224235, -3297458}, + FieldElement{-17168938, -14854097, -3395676, -16369877, -19954045, 14050420, 21728352, 9493610, 18620611, -16428628}, + FieldElement{-13323321, 13325349, 11432106, 5964811, 18609221, 6062965, -5269471, -9725556, -30701573, -16479657}, + }, + { + FieldElement{-23860538, -11233159, 26961357, 1640861, -32413112, -16737940, 12248509, -5240639, 13735342, 1934062}, + FieldElement{25089769, 6742589, 17081145, -13406266, 21909293, -16067981, -15136294, -3765346, -21277997, 5473616}, + FieldElement{31883677, -7961101, 1083432, -11572403, 22828471, 13290673, -7125085, 12469656, 29111212, -5451014}, + }, + { + FieldElement{24244947, -15050407, -26262976, 2791540, -14997599, 16666678, 24367466, 6388839, -10295587, 452383}, + FieldElement{-25640782, -3417841, 5217916, 16224624, 19987036, -4082269, -24236251, -5915248, 15766062, 8407814}, + FieldElement{-20406999, 13990231, 15495425, 16395525, 5377168, 15166495, -8917023, -4388953, -8067909, 2276718}, + }, + { + FieldElement{30157918, 12924066, -17712050, 9245753, 19895028, 3368142, -23827587, 5096219, 22740376, -7303417}, + FieldElement{2041139, -14256350, 7783687, 13876377, -25946985, -13352459, 24051124, 13742383, -15637599, 13295222}, + FieldElement{33338237, -8505733, 12532113, 7977527, 9106186, -1715251, -17720195, -4612972, -4451357, -14669444}, + }, + { + FieldElement{-20045281, 5454097, -14346548, 6447146, 28862071, 1883651, -2469266, -4141880, 7770569, 9620597}, + FieldElement{23208068, 7979712, 33071466, 8149229, 1758231, -10834995, 30945528, -1694323, -33502340, -14767970}, + FieldElement{1439958, -16270480, -1079989, -793782, 4625402, 10647766, -5043801, 1220118, 30494170, -11440799}, + }, + { + FieldElement{-5037580, -13028295, -2970559, -3061767, 15640974, -6701666, -26739026, 926050, -1684339, -13333647}, + FieldElement{13908495, -3549272, 30919928, -6273825, -21521863, 7989039, 9021034, 9078865, 3353509, 4033511}, + FieldElement{-29663431, -15113610, 32259991, -344482, 24295849, -12912123, 23161163, 8839127, 27485041, 7356032}, + }, + }, + { + { + FieldElement{9661027, 705443, 11980065, -5370154, -1628543, 14661173, -6346142, 2625015, 28431036, -16771834}, + FieldElement{-23839233, -8311415, -25945511, 7480958, -17681669, -8354183, -22545972, 14150565, 15970762, 4099461}, + FieldElement{29262576, 16756590, 26350592, -8793563, 8529671, -11208050, 13617293, -9937143, 11465739, 8317062}, + }, + { + FieldElement{-25493081, -6962928, 32500200, -9419051, -23038724, -2302222, 14898637, 3848455, 20969334, -5157516}, + FieldElement{-20384450, -14347713, -18336405, 13884722, -33039454, 2842114, -21610826, -3649888, 11177095, 14989547}, + FieldElement{-24496721, -11716016, 16959896, 2278463, 12066309, 10137771, 13515641, 2581286, -28487508, 9930240}, + }, + { + FieldElement{-17751622, -2097826, 16544300, -13009300, -15914807, -14949081, 18345767, -13403753, 16291481, -5314038}, + FieldElement{-33229194, 2553288, 32678213, 9875984, 8534129, 6889387, -9676774, 6957617, 4368891, 9788741}, + FieldElement{16660756, 7281060, -10830758, 12911820, 20108584, -8101676, -21722536, -8613148, 16250552, -11111103}, + }, + { + FieldElement{-19765507, 2390526, -16551031, 14161980, 1905286, 6414907, 4689584, 10604807, -30190403, 4782747}, + FieldElement{-1354539, 14736941, -7367442, -13292886, 7710542, -14155590, -9981571, 4383045, 22546403, 437323}, + FieldElement{31665577, -12180464, -16186830, 1491339, -18368625, 3294682, 27343084, 2786261, -30633590, -14097016}, + }, + { + FieldElement{-14467279, -683715, -33374107, 7448552, 19294360, 14334329, -19690631, 2355319, -19284671, -6114373}, + FieldElement{15121312, -15796162, 6377020, -6031361, -10798111, -12957845, 18952177, 15496498, -29380133, 11754228}, + FieldElement{-2637277, -13483075, 8488727, -14303896, 12728761, -1622493, 7141596, 11724556, 22761615, -10134141}, + }, + { + FieldElement{16918416, 11729663, -18083579, 3022987, -31015732, -13339659, -28741185, -12227393, 32851222, 11717399}, + FieldElement{11166634, 7338049, -6722523, 4531520, -29468672, -7302055, 31474879, 3483633, -1193175, -4030831}, + FieldElement{-185635, 9921305, 31456609, -13536438, -12013818, 13348923, 33142652, 6546660, -19985279, -3948376}, + }, + { + FieldElement{-32460596, 11266712, -11197107, -7899103, 31703694, 3855903, -8537131, -12833048, -30772034, -15486313}, + FieldElement{-18006477, 12709068, 3991746, -6479188, -21491523, -10550425, -31135347, -16049879, 10928917, 3011958}, + FieldElement{-6957757, -15594337, 31696059, 334240, 29576716, 14796075, -30831056, -12805180, 18008031, 10258577}, + }, + { + FieldElement{-22448644, 15655569, 7018479, -4410003, -30314266, -1201591, -1853465, 1367120, 25127874, 6671743}, + FieldElement{29701166, -14373934, -10878120, 9279288, -17568, 13127210, 21382910, 11042292, 25838796, 4642684}, + FieldElement{-20430234, 14955537, -24126347, 8124619, -5369288, -5990470, 30468147, -13900640, 18423289, 4177476}, + }, + }, +} diff --git a/vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/edwards25519.go b/vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/edwards25519.go new file mode 100644 index 000000000..5f8b99478 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/ed25519/internal/edwards25519/edwards25519.go @@ -0,0 +1,1771 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package edwards25519 + +// This code is a port of the public domain, “ref10” implementation of ed25519 +// from SUPERCOP. + +// FieldElement represents an element of the field GF(2^255 - 19). An element +// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77 +// t[3]+2^102 t[4]+...+2^230 t[9]. Bounds on each t[i] vary depending on +// context. +type FieldElement [10]int32 + +var zero FieldElement + +func FeZero(fe *FieldElement) { + copy(fe[:], zero[:]) +} + +func FeOne(fe *FieldElement) { + FeZero(fe) + fe[0] = 1 +} + +func FeAdd(dst, a, b *FieldElement) { + dst[0] = a[0] + b[0] + dst[1] = a[1] + b[1] + dst[2] = a[2] + b[2] + dst[3] = a[3] + b[3] + dst[4] = a[4] + b[4] + dst[5] = a[5] + b[5] + dst[6] = a[6] + b[6] + dst[7] = a[7] + b[7] + dst[8] = a[8] + b[8] + dst[9] = a[9] + b[9] +} + +func FeSub(dst, a, b *FieldElement) { + dst[0] = a[0] - b[0] + dst[1] = a[1] - b[1] + dst[2] = a[2] - b[2] + dst[3] = a[3] - b[3] + dst[4] = a[4] - b[4] + dst[5] = a[5] - b[5] + dst[6] = a[6] - b[6] + dst[7] = a[7] - b[7] + dst[8] = a[8] - b[8] + dst[9] = a[9] - b[9] +} + +func FeCopy(dst, src *FieldElement) { + copy(dst[:], src[:]) +} + +// Replace (f,g) with (g,g) if b == 1; +// replace (f,g) with (f,g) if b == 0. +// +// Preconditions: b in {0,1}. +func FeCMove(f, g *FieldElement, b int32) { + b = -b + f[0] ^= b & (f[0] ^ g[0]) + f[1] ^= b & (f[1] ^ g[1]) + f[2] ^= b & (f[2] ^ g[2]) + f[3] ^= b & (f[3] ^ g[3]) + f[4] ^= b & (f[4] ^ g[4]) + f[5] ^= b & (f[5] ^ g[5]) + f[6] ^= b & (f[6] ^ g[6]) + f[7] ^= b & (f[7] ^ g[7]) + f[8] ^= b & (f[8] ^ g[8]) + f[9] ^= b & (f[9] ^ g[9]) +} + +func load3(in []byte) int64 { + var r int64 + r = int64(in[0]) + r |= int64(in[1]) << 8 + r |= int64(in[2]) << 16 + return r +} + +func load4(in []byte) int64 { + var r int64 + r = int64(in[0]) + r |= int64(in[1]) << 8 + r |= int64(in[2]) << 16 + r |= int64(in[3]) << 24 + return r +} + +func FeFromBytes(dst *FieldElement, src *[32]byte) { + h0 := load4(src[:]) + h1 := load3(src[4:]) << 6 + h2 := load3(src[7:]) << 5 + h3 := load3(src[10:]) << 3 + h4 := load3(src[13:]) << 2 + h5 := load4(src[16:]) + h6 := load3(src[20:]) << 7 + h7 := load3(src[23:]) << 5 + h8 := load3(src[26:]) << 4 + h9 := (load3(src[29:]) & 8388607) << 2 + + FeCombine(dst, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) +} + +// FeToBytes marshals h to s. +// Preconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +// +// Write p=2^255-19; q=floor(h/p). +// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))). +// +// Proof: +// Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4. +// Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4. +// +// Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9). +// Then 0> 25 + q = (h[0] + q) >> 26 + q = (h[1] + q) >> 25 + q = (h[2] + q) >> 26 + q = (h[3] + q) >> 25 + q = (h[4] + q) >> 26 + q = (h[5] + q) >> 25 + q = (h[6] + q) >> 26 + q = (h[7] + q) >> 25 + q = (h[8] + q) >> 26 + q = (h[9] + q) >> 25 + + // Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20. + h[0] += 19 * q + // Goal: Output h-2^255 q, which is between 0 and 2^255-20. + + carry[0] = h[0] >> 26 + h[1] += carry[0] + h[0] -= carry[0] << 26 + carry[1] = h[1] >> 25 + h[2] += carry[1] + h[1] -= carry[1] << 25 + carry[2] = h[2] >> 26 + h[3] += carry[2] + h[2] -= carry[2] << 26 + carry[3] = h[3] >> 25 + h[4] += carry[3] + h[3] -= carry[3] << 25 + carry[4] = h[4] >> 26 + h[5] += carry[4] + h[4] -= carry[4] << 26 + carry[5] = h[5] >> 25 + h[6] += carry[5] + h[5] -= carry[5] << 25 + carry[6] = h[6] >> 26 + h[7] += carry[6] + h[6] -= carry[6] << 26 + carry[7] = h[7] >> 25 + h[8] += carry[7] + h[7] -= carry[7] << 25 + carry[8] = h[8] >> 26 + h[9] += carry[8] + h[8] -= carry[8] << 26 + carry[9] = h[9] >> 25 + h[9] -= carry[9] << 25 + // h10 = carry9 + + // Goal: Output h[0]+...+2^255 h10-2^255 q, which is between 0 and 2^255-20. + // Have h[0]+...+2^230 h[9] between 0 and 2^255-1; + // evidently 2^255 h10-2^255 q = 0. + // Goal: Output h[0]+...+2^230 h[9]. + + s[0] = byte(h[0] >> 0) + s[1] = byte(h[0] >> 8) + s[2] = byte(h[0] >> 16) + s[3] = byte((h[0] >> 24) | (h[1] << 2)) + s[4] = byte(h[1] >> 6) + s[5] = byte(h[1] >> 14) + s[6] = byte((h[1] >> 22) | (h[2] << 3)) + s[7] = byte(h[2] >> 5) + s[8] = byte(h[2] >> 13) + s[9] = byte((h[2] >> 21) | (h[3] << 5)) + s[10] = byte(h[3] >> 3) + s[11] = byte(h[3] >> 11) + s[12] = byte((h[3] >> 19) | (h[4] << 6)) + s[13] = byte(h[4] >> 2) + s[14] = byte(h[4] >> 10) + s[15] = byte(h[4] >> 18) + s[16] = byte(h[5] >> 0) + s[17] = byte(h[5] >> 8) + s[18] = byte(h[5] >> 16) + s[19] = byte((h[5] >> 24) | (h[6] << 1)) + s[20] = byte(h[6] >> 7) + s[21] = byte(h[6] >> 15) + s[22] = byte((h[6] >> 23) | (h[7] << 3)) + s[23] = byte(h[7] >> 5) + s[24] = byte(h[7] >> 13) + s[25] = byte((h[7] >> 21) | (h[8] << 4)) + s[26] = byte(h[8] >> 4) + s[27] = byte(h[8] >> 12) + s[28] = byte((h[8] >> 20) | (h[9] << 6)) + s[29] = byte(h[9] >> 2) + s[30] = byte(h[9] >> 10) + s[31] = byte(h[9] >> 18) +} + +func FeIsNegative(f *FieldElement) byte { + var s [32]byte + FeToBytes(&s, f) + return s[0] & 1 +} + +func FeIsNonZero(f *FieldElement) int32 { + var s [32]byte + FeToBytes(&s, f) + var x uint8 + for _, b := range s { + x |= b + } + x |= x >> 4 + x |= x >> 2 + x |= x >> 1 + return int32(x & 1) +} + +// FeNeg sets h = -f +// +// Preconditions: +// |f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +// +// Postconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +func FeNeg(h, f *FieldElement) { + h[0] = -f[0] + h[1] = -f[1] + h[2] = -f[2] + h[3] = -f[3] + h[4] = -f[4] + h[5] = -f[5] + h[6] = -f[6] + h[7] = -f[7] + h[8] = -f[8] + h[9] = -f[9] +} + +func FeCombine(h *FieldElement, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 int64) { + var c0, c1, c2, c3, c4, c5, c6, c7, c8, c9 int64 + + /* + |h0| <= (1.1*1.1*2^52*(1+19+19+19+19)+1.1*1.1*2^50*(38+38+38+38+38)) + i.e. |h0| <= 1.2*2^59; narrower ranges for h2, h4, h6, h8 + |h1| <= (1.1*1.1*2^51*(1+1+19+19+19+19+19+19+19+19)) + i.e. |h1| <= 1.5*2^58; narrower ranges for h3, h5, h7, h9 + */ + + c0 = (h0 + (1 << 25)) >> 26 + h1 += c0 + h0 -= c0 << 26 + c4 = (h4 + (1 << 25)) >> 26 + h5 += c4 + h4 -= c4 << 26 + /* |h0| <= 2^25 */ + /* |h4| <= 2^25 */ + /* |h1| <= 1.51*2^58 */ + /* |h5| <= 1.51*2^58 */ + + c1 = (h1 + (1 << 24)) >> 25 + h2 += c1 + h1 -= c1 << 25 + c5 = (h5 + (1 << 24)) >> 25 + h6 += c5 + h5 -= c5 << 25 + /* |h1| <= 2^24; from now on fits into int32 */ + /* |h5| <= 2^24; from now on fits into int32 */ + /* |h2| <= 1.21*2^59 */ + /* |h6| <= 1.21*2^59 */ + + c2 = (h2 + (1 << 25)) >> 26 + h3 += c2 + h2 -= c2 << 26 + c6 = (h6 + (1 << 25)) >> 26 + h7 += c6 + h6 -= c6 << 26 + /* |h2| <= 2^25; from now on fits into int32 unchanged */ + /* |h6| <= 2^25; from now on fits into int32 unchanged */ + /* |h3| <= 1.51*2^58 */ + /* |h7| <= 1.51*2^58 */ + + c3 = (h3 + (1 << 24)) >> 25 + h4 += c3 + h3 -= c3 << 25 + c7 = (h7 + (1 << 24)) >> 25 + h8 += c7 + h7 -= c7 << 25 + /* |h3| <= 2^24; from now on fits into int32 unchanged */ + /* |h7| <= 2^24; from now on fits into int32 unchanged */ + /* |h4| <= 1.52*2^33 */ + /* |h8| <= 1.52*2^33 */ + + c4 = (h4 + (1 << 25)) >> 26 + h5 += c4 + h4 -= c4 << 26 + c8 = (h8 + (1 << 25)) >> 26 + h9 += c8 + h8 -= c8 << 26 + /* |h4| <= 2^25; from now on fits into int32 unchanged */ + /* |h8| <= 2^25; from now on fits into int32 unchanged */ + /* |h5| <= 1.01*2^24 */ + /* |h9| <= 1.51*2^58 */ + + c9 = (h9 + (1 << 24)) >> 25 + h0 += c9 * 19 + h9 -= c9 << 25 + /* |h9| <= 2^24; from now on fits into int32 unchanged */ + /* |h0| <= 1.8*2^37 */ + + c0 = (h0 + (1 << 25)) >> 26 + h1 += c0 + h0 -= c0 << 26 + /* |h0| <= 2^25; from now on fits into int32 unchanged */ + /* |h1| <= 1.01*2^24 */ + + h[0] = int32(h0) + h[1] = int32(h1) + h[2] = int32(h2) + h[3] = int32(h3) + h[4] = int32(h4) + h[5] = int32(h5) + h[6] = int32(h6) + h[7] = int32(h7) + h[8] = int32(h8) + h[9] = int32(h9) +} + +// FeMul calculates h = f * g +// Can overlap h with f or g. +// +// Preconditions: +// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +// |g| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +// +// Postconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +// +// Notes on implementation strategy: +// +// Using schoolbook multiplication. +// Karatsuba would save a little in some cost models. +// +// Most multiplications by 2 and 19 are 32-bit precomputations; +// cheaper than 64-bit postcomputations. +// +// There is one remaining multiplication by 19 in the carry chain; +// one *19 precomputation can be merged into this, +// but the resulting data flow is considerably less clean. +// +// There are 12 carries below. +// 10 of them are 2-way parallelizable and vectorizable. +// Can get away with 11 carries, but then data flow is much deeper. +// +// With tighter constraints on inputs, can squeeze carries into int32. +func FeMul(h, f, g *FieldElement) { + f0 := int64(f[0]) + f1 := int64(f[1]) + f2 := int64(f[2]) + f3 := int64(f[3]) + f4 := int64(f[4]) + f5 := int64(f[5]) + f6 := int64(f[6]) + f7 := int64(f[7]) + f8 := int64(f[8]) + f9 := int64(f[9]) + + f1_2 := int64(2 * f[1]) + f3_2 := int64(2 * f[3]) + f5_2 := int64(2 * f[5]) + f7_2 := int64(2 * f[7]) + f9_2 := int64(2 * f[9]) + + g0 := int64(g[0]) + g1 := int64(g[1]) + g2 := int64(g[2]) + g3 := int64(g[3]) + g4 := int64(g[4]) + g5 := int64(g[5]) + g6 := int64(g[6]) + g7 := int64(g[7]) + g8 := int64(g[8]) + g9 := int64(g[9]) + + g1_19 := int64(19 * g[1]) /* 1.4*2^29 */ + g2_19 := int64(19 * g[2]) /* 1.4*2^30; still ok */ + g3_19 := int64(19 * g[3]) + g4_19 := int64(19 * g[4]) + g5_19 := int64(19 * g[5]) + g6_19 := int64(19 * g[6]) + g7_19 := int64(19 * g[7]) + g8_19 := int64(19 * g[8]) + g9_19 := int64(19 * g[9]) + + h0 := f0*g0 + f1_2*g9_19 + f2*g8_19 + f3_2*g7_19 + f4*g6_19 + f5_2*g5_19 + f6*g4_19 + f7_2*g3_19 + f8*g2_19 + f9_2*g1_19 + h1 := f0*g1 + f1*g0 + f2*g9_19 + f3*g8_19 + f4*g7_19 + f5*g6_19 + f6*g5_19 + f7*g4_19 + f8*g3_19 + f9*g2_19 + h2 := f0*g2 + f1_2*g1 + f2*g0 + f3_2*g9_19 + f4*g8_19 + f5_2*g7_19 + f6*g6_19 + f7_2*g5_19 + f8*g4_19 + f9_2*g3_19 + h3 := f0*g3 + f1*g2 + f2*g1 + f3*g0 + f4*g9_19 + f5*g8_19 + f6*g7_19 + f7*g6_19 + f8*g5_19 + f9*g4_19 + h4 := f0*g4 + f1_2*g3 + f2*g2 + f3_2*g1 + f4*g0 + f5_2*g9_19 + f6*g8_19 + f7_2*g7_19 + f8*g6_19 + f9_2*g5_19 + h5 := f0*g5 + f1*g4 + f2*g3 + f3*g2 + f4*g1 + f5*g0 + f6*g9_19 + f7*g8_19 + f8*g7_19 + f9*g6_19 + h6 := f0*g6 + f1_2*g5 + f2*g4 + f3_2*g3 + f4*g2 + f5_2*g1 + f6*g0 + f7_2*g9_19 + f8*g8_19 + f9_2*g7_19 + h7 := f0*g7 + f1*g6 + f2*g5 + f3*g4 + f4*g3 + f5*g2 + f6*g1 + f7*g0 + f8*g9_19 + f9*g8_19 + h8 := f0*g8 + f1_2*g7 + f2*g6 + f3_2*g5 + f4*g4 + f5_2*g3 + f6*g2 + f7_2*g1 + f8*g0 + f9_2*g9_19 + h9 := f0*g9 + f1*g8 + f2*g7 + f3*g6 + f4*g5 + f5*g4 + f6*g3 + f7*g2 + f8*g1 + f9*g0 + + FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) +} + +func feSquare(f *FieldElement) (h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 int64) { + f0 := int64(f[0]) + f1 := int64(f[1]) + f2 := int64(f[2]) + f3 := int64(f[3]) + f4 := int64(f[4]) + f5 := int64(f[5]) + f6 := int64(f[6]) + f7 := int64(f[7]) + f8 := int64(f[8]) + f9 := int64(f[9]) + f0_2 := int64(2 * f[0]) + f1_2 := int64(2 * f[1]) + f2_2 := int64(2 * f[2]) + f3_2 := int64(2 * f[3]) + f4_2 := int64(2 * f[4]) + f5_2 := int64(2 * f[5]) + f6_2 := int64(2 * f[6]) + f7_2 := int64(2 * f[7]) + f5_38 := 38 * f5 // 1.31*2^30 + f6_19 := 19 * f6 // 1.31*2^30 + f7_38 := 38 * f7 // 1.31*2^30 + f8_19 := 19 * f8 // 1.31*2^30 + f9_38 := 38 * f9 // 1.31*2^30 + + h0 = f0*f0 + f1_2*f9_38 + f2_2*f8_19 + f3_2*f7_38 + f4_2*f6_19 + f5*f5_38 + h1 = f0_2*f1 + f2*f9_38 + f3_2*f8_19 + f4*f7_38 + f5_2*f6_19 + h2 = f0_2*f2 + f1_2*f1 + f3_2*f9_38 + f4_2*f8_19 + f5_2*f7_38 + f6*f6_19 + h3 = f0_2*f3 + f1_2*f2 + f4*f9_38 + f5_2*f8_19 + f6*f7_38 + h4 = f0_2*f4 + f1_2*f3_2 + f2*f2 + f5_2*f9_38 + f6_2*f8_19 + f7*f7_38 + h5 = f0_2*f5 + f1_2*f4 + f2_2*f3 + f6*f9_38 + f7_2*f8_19 + h6 = f0_2*f6 + f1_2*f5_2 + f2_2*f4 + f3_2*f3 + f7_2*f9_38 + f8*f8_19 + h7 = f0_2*f7 + f1_2*f6 + f2_2*f5 + f3_2*f4 + f8*f9_38 + h8 = f0_2*f8 + f1_2*f7_2 + f2_2*f6 + f3_2*f5_2 + f4*f4 + f9*f9_38 + h9 = f0_2*f9 + f1_2*f8 + f2_2*f7 + f3_2*f6 + f4_2*f5 + + return +} + +// FeSquare calculates h = f*f. Can overlap h with f. +// +// Preconditions: +// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. +// +// Postconditions: +// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. +func FeSquare(h, f *FieldElement) { + h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 := feSquare(f) + FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) +} + +// FeSquare2 sets h = 2 * f * f +// +// Can overlap h with f. +// +// Preconditions: +// |f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc. +// +// Postconditions: +// |h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc. +// See fe_mul.c for discussion of implementation strategy. +func FeSquare2(h, f *FieldElement) { + h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 := feSquare(f) + + h0 += h0 + h1 += h1 + h2 += h2 + h3 += h3 + h4 += h4 + h5 += h5 + h6 += h6 + h7 += h7 + h8 += h8 + h9 += h9 + + FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) +} + +func FeInvert(out, z *FieldElement) { + var t0, t1, t2, t3 FieldElement + var i int + + FeSquare(&t0, z) // 2^1 + FeSquare(&t1, &t0) // 2^2 + for i = 1; i < 2; i++ { // 2^3 + FeSquare(&t1, &t1) + } + FeMul(&t1, z, &t1) // 2^3 + 2^0 + FeMul(&t0, &t0, &t1) // 2^3 + 2^1 + 2^0 + FeSquare(&t2, &t0) // 2^4 + 2^2 + 2^1 + FeMul(&t1, &t1, &t2) // 2^4 + 2^3 + 2^2 + 2^1 + 2^0 + FeSquare(&t2, &t1) // 5,4,3,2,1 + for i = 1; i < 5; i++ { // 9,8,7,6,5 + FeSquare(&t2, &t2) + } + FeMul(&t1, &t2, &t1) // 9,8,7,6,5,4,3,2,1,0 + FeSquare(&t2, &t1) // 10..1 + for i = 1; i < 10; i++ { // 19..10 + FeSquare(&t2, &t2) + } + FeMul(&t2, &t2, &t1) // 19..0 + FeSquare(&t3, &t2) // 20..1 + for i = 1; i < 20; i++ { // 39..20 + FeSquare(&t3, &t3) + } + FeMul(&t2, &t3, &t2) // 39..0 + FeSquare(&t2, &t2) // 40..1 + for i = 1; i < 10; i++ { // 49..10 + FeSquare(&t2, &t2) + } + FeMul(&t1, &t2, &t1) // 49..0 + FeSquare(&t2, &t1) // 50..1 + for i = 1; i < 50; i++ { // 99..50 + FeSquare(&t2, &t2) + } + FeMul(&t2, &t2, &t1) // 99..0 + FeSquare(&t3, &t2) // 100..1 + for i = 1; i < 100; i++ { // 199..100 + FeSquare(&t3, &t3) + } + FeMul(&t2, &t3, &t2) // 199..0 + FeSquare(&t2, &t2) // 200..1 + for i = 1; i < 50; i++ { // 249..50 + FeSquare(&t2, &t2) + } + FeMul(&t1, &t2, &t1) // 249..0 + FeSquare(&t1, &t1) // 250..1 + for i = 1; i < 5; i++ { // 254..5 + FeSquare(&t1, &t1) + } + FeMul(out, &t1, &t0) // 254..5,3,1,0 +} + +func fePow22523(out, z *FieldElement) { + var t0, t1, t2 FieldElement + var i int + + FeSquare(&t0, z) + for i = 1; i < 1; i++ { + FeSquare(&t0, &t0) + } + FeSquare(&t1, &t0) + for i = 1; i < 2; i++ { + FeSquare(&t1, &t1) + } + FeMul(&t1, z, &t1) + FeMul(&t0, &t0, &t1) + FeSquare(&t0, &t0) + for i = 1; i < 1; i++ { + FeSquare(&t0, &t0) + } + FeMul(&t0, &t1, &t0) + FeSquare(&t1, &t0) + for i = 1; i < 5; i++ { + FeSquare(&t1, &t1) + } + FeMul(&t0, &t1, &t0) + FeSquare(&t1, &t0) + for i = 1; i < 10; i++ { + FeSquare(&t1, &t1) + } + FeMul(&t1, &t1, &t0) + FeSquare(&t2, &t1) + for i = 1; i < 20; i++ { + FeSquare(&t2, &t2) + } + FeMul(&t1, &t2, &t1) + FeSquare(&t1, &t1) + for i = 1; i < 10; i++ { + FeSquare(&t1, &t1) + } + FeMul(&t0, &t1, &t0) + FeSquare(&t1, &t0) + for i = 1; i < 50; i++ { + FeSquare(&t1, &t1) + } + FeMul(&t1, &t1, &t0) + FeSquare(&t2, &t1) + for i = 1; i < 100; i++ { + FeSquare(&t2, &t2) + } + FeMul(&t1, &t2, &t1) + FeSquare(&t1, &t1) + for i = 1; i < 50; i++ { + FeSquare(&t1, &t1) + } + FeMul(&t0, &t1, &t0) + FeSquare(&t0, &t0) + for i = 1; i < 2; i++ { + FeSquare(&t0, &t0) + } + FeMul(out, &t0, z) +} + +// Group elements are members of the elliptic curve -x^2 + y^2 = 1 + d * x^2 * +// y^2 where d = -121665/121666. +// +// Several representations are used: +// ProjectiveGroupElement: (X:Y:Z) satisfying x=X/Z, y=Y/Z +// ExtendedGroupElement: (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT +// CompletedGroupElement: ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T +// PreComputedGroupElement: (y+x,y-x,2dxy) + +type ProjectiveGroupElement struct { + X, Y, Z FieldElement +} + +type ExtendedGroupElement struct { + X, Y, Z, T FieldElement +} + +type CompletedGroupElement struct { + X, Y, Z, T FieldElement +} + +type PreComputedGroupElement struct { + yPlusX, yMinusX, xy2d FieldElement +} + +type CachedGroupElement struct { + yPlusX, yMinusX, Z, T2d FieldElement +} + +func (p *ProjectiveGroupElement) Zero() { + FeZero(&p.X) + FeOne(&p.Y) + FeOne(&p.Z) +} + +func (p *ProjectiveGroupElement) Double(r *CompletedGroupElement) { + var t0 FieldElement + + FeSquare(&r.X, &p.X) + FeSquare(&r.Z, &p.Y) + FeSquare2(&r.T, &p.Z) + FeAdd(&r.Y, &p.X, &p.Y) + FeSquare(&t0, &r.Y) + FeAdd(&r.Y, &r.Z, &r.X) + FeSub(&r.Z, &r.Z, &r.X) + FeSub(&r.X, &t0, &r.Y) + FeSub(&r.T, &r.T, &r.Z) +} + +func (p *ProjectiveGroupElement) ToBytes(s *[32]byte) { + var recip, x, y FieldElement + + FeInvert(&recip, &p.Z) + FeMul(&x, &p.X, &recip) + FeMul(&y, &p.Y, &recip) + FeToBytes(s, &y) + s[31] ^= FeIsNegative(&x) << 7 +} + +func (p *ExtendedGroupElement) Zero() { + FeZero(&p.X) + FeOne(&p.Y) + FeOne(&p.Z) + FeZero(&p.T) +} + +func (p *ExtendedGroupElement) Double(r *CompletedGroupElement) { + var q ProjectiveGroupElement + p.ToProjective(&q) + q.Double(r) +} + +func (p *ExtendedGroupElement) ToCached(r *CachedGroupElement) { + FeAdd(&r.yPlusX, &p.Y, &p.X) + FeSub(&r.yMinusX, &p.Y, &p.X) + FeCopy(&r.Z, &p.Z) + FeMul(&r.T2d, &p.T, &d2) +} + +func (p *ExtendedGroupElement) ToProjective(r *ProjectiveGroupElement) { + FeCopy(&r.X, &p.X) + FeCopy(&r.Y, &p.Y) + FeCopy(&r.Z, &p.Z) +} + +func (p *ExtendedGroupElement) ToBytes(s *[32]byte) { + var recip, x, y FieldElement + + FeInvert(&recip, &p.Z) + FeMul(&x, &p.X, &recip) + FeMul(&y, &p.Y, &recip) + FeToBytes(s, &y) + s[31] ^= FeIsNegative(&x) << 7 +} + +func (p *ExtendedGroupElement) FromBytes(s *[32]byte) bool { + var u, v, v3, vxx, check FieldElement + + FeFromBytes(&p.Y, s) + FeOne(&p.Z) + FeSquare(&u, &p.Y) + FeMul(&v, &u, &d) + FeSub(&u, &u, &p.Z) // y = y^2-1 + FeAdd(&v, &v, &p.Z) // v = dy^2+1 + + FeSquare(&v3, &v) + FeMul(&v3, &v3, &v) // v3 = v^3 + FeSquare(&p.X, &v3) + FeMul(&p.X, &p.X, &v) + FeMul(&p.X, &p.X, &u) // x = uv^7 + + fePow22523(&p.X, &p.X) // x = (uv^7)^((q-5)/8) + FeMul(&p.X, &p.X, &v3) + FeMul(&p.X, &p.X, &u) // x = uv^3(uv^7)^((q-5)/8) + + var tmpX, tmp2 [32]byte + + FeSquare(&vxx, &p.X) + FeMul(&vxx, &vxx, &v) + FeSub(&check, &vxx, &u) // vx^2-u + if FeIsNonZero(&check) == 1 { + FeAdd(&check, &vxx, &u) // vx^2+u + if FeIsNonZero(&check) == 1 { + return false + } + FeMul(&p.X, &p.X, &SqrtM1) + + FeToBytes(&tmpX, &p.X) + for i, v := range tmpX { + tmp2[31-i] = v + } + } + + if FeIsNegative(&p.X) != (s[31] >> 7) { + FeNeg(&p.X, &p.X) + } + + FeMul(&p.T, &p.X, &p.Y) + return true +} + +func (p *CompletedGroupElement) ToProjective(r *ProjectiveGroupElement) { + FeMul(&r.X, &p.X, &p.T) + FeMul(&r.Y, &p.Y, &p.Z) + FeMul(&r.Z, &p.Z, &p.T) +} + +func (p *CompletedGroupElement) ToExtended(r *ExtendedGroupElement) { + FeMul(&r.X, &p.X, &p.T) + FeMul(&r.Y, &p.Y, &p.Z) + FeMul(&r.Z, &p.Z, &p.T) + FeMul(&r.T, &p.X, &p.Y) +} + +func (p *PreComputedGroupElement) Zero() { + FeOne(&p.yPlusX) + FeOne(&p.yMinusX) + FeZero(&p.xy2d) +} + +func geAdd(r *CompletedGroupElement, p *ExtendedGroupElement, q *CachedGroupElement) { + var t0 FieldElement + + FeAdd(&r.X, &p.Y, &p.X) + FeSub(&r.Y, &p.Y, &p.X) + FeMul(&r.Z, &r.X, &q.yPlusX) + FeMul(&r.Y, &r.Y, &q.yMinusX) + FeMul(&r.T, &q.T2d, &p.T) + FeMul(&r.X, &p.Z, &q.Z) + FeAdd(&t0, &r.X, &r.X) + FeSub(&r.X, &r.Z, &r.Y) + FeAdd(&r.Y, &r.Z, &r.Y) + FeAdd(&r.Z, &t0, &r.T) + FeSub(&r.T, &t0, &r.T) +} + +func geSub(r *CompletedGroupElement, p *ExtendedGroupElement, q *CachedGroupElement) { + var t0 FieldElement + + FeAdd(&r.X, &p.Y, &p.X) + FeSub(&r.Y, &p.Y, &p.X) + FeMul(&r.Z, &r.X, &q.yMinusX) + FeMul(&r.Y, &r.Y, &q.yPlusX) + FeMul(&r.T, &q.T2d, &p.T) + FeMul(&r.X, &p.Z, &q.Z) + FeAdd(&t0, &r.X, &r.X) + FeSub(&r.X, &r.Z, &r.Y) + FeAdd(&r.Y, &r.Z, &r.Y) + FeSub(&r.Z, &t0, &r.T) + FeAdd(&r.T, &t0, &r.T) +} + +func geMixedAdd(r *CompletedGroupElement, p *ExtendedGroupElement, q *PreComputedGroupElement) { + var t0 FieldElement + + FeAdd(&r.X, &p.Y, &p.X) + FeSub(&r.Y, &p.Y, &p.X) + FeMul(&r.Z, &r.X, &q.yPlusX) + FeMul(&r.Y, &r.Y, &q.yMinusX) + FeMul(&r.T, &q.xy2d, &p.T) + FeAdd(&t0, &p.Z, &p.Z) + FeSub(&r.X, &r.Z, &r.Y) + FeAdd(&r.Y, &r.Z, &r.Y) + FeAdd(&r.Z, &t0, &r.T) + FeSub(&r.T, &t0, &r.T) +} + +func geMixedSub(r *CompletedGroupElement, p *ExtendedGroupElement, q *PreComputedGroupElement) { + var t0 FieldElement + + FeAdd(&r.X, &p.Y, &p.X) + FeSub(&r.Y, &p.Y, &p.X) + FeMul(&r.Z, &r.X, &q.yMinusX) + FeMul(&r.Y, &r.Y, &q.yPlusX) + FeMul(&r.T, &q.xy2d, &p.T) + FeAdd(&t0, &p.Z, &p.Z) + FeSub(&r.X, &r.Z, &r.Y) + FeAdd(&r.Y, &r.Z, &r.Y) + FeSub(&r.Z, &t0, &r.T) + FeAdd(&r.T, &t0, &r.T) +} + +func slide(r *[256]int8, a *[32]byte) { + for i := range r { + r[i] = int8(1 & (a[i>>3] >> uint(i&7))) + } + + for i := range r { + if r[i] != 0 { + for b := 1; b <= 6 && i+b < 256; b++ { + if r[i+b] != 0 { + if r[i]+(r[i+b]<= -15 { + r[i] -= r[i+b] << uint(b) + for k := i + b; k < 256; k++ { + if r[k] == 0 { + r[k] = 1 + break + } + r[k] = 0 + } + } else { + break + } + } + } + } + } +} + +// GeDoubleScalarMultVartime sets r = a*A + b*B +// where a = a[0]+256*a[1]+...+256^31 a[31]. +// and b = b[0]+256*b[1]+...+256^31 b[31]. +// B is the Ed25519 base point (x,4/5) with x positive. +func GeDoubleScalarMultVartime(r *ProjectiveGroupElement, a *[32]byte, A *ExtendedGroupElement, b *[32]byte) { + var aSlide, bSlide [256]int8 + var Ai [8]CachedGroupElement // A,3A,5A,7A,9A,11A,13A,15A + var t CompletedGroupElement + var u, A2 ExtendedGroupElement + var i int + + slide(&aSlide, a) + slide(&bSlide, b) + + A.ToCached(&Ai[0]) + A.Double(&t) + t.ToExtended(&A2) + + for i := 0; i < 7; i++ { + geAdd(&t, &A2, &Ai[i]) + t.ToExtended(&u) + u.ToCached(&Ai[i+1]) + } + + r.Zero() + + for i = 255; i >= 0; i-- { + if aSlide[i] != 0 || bSlide[i] != 0 { + break + } + } + + for ; i >= 0; i-- { + r.Double(&t) + + if aSlide[i] > 0 { + t.ToExtended(&u) + geAdd(&t, &u, &Ai[aSlide[i]/2]) + } else if aSlide[i] < 0 { + t.ToExtended(&u) + geSub(&t, &u, &Ai[(-aSlide[i])/2]) + } + + if bSlide[i] > 0 { + t.ToExtended(&u) + geMixedAdd(&t, &u, &bi[bSlide[i]/2]) + } else if bSlide[i] < 0 { + t.ToExtended(&u) + geMixedSub(&t, &u, &bi[(-bSlide[i])/2]) + } + + t.ToProjective(r) + } +} + +// equal returns 1 if b == c and 0 otherwise, assuming that b and c are +// non-negative. +func equal(b, c int32) int32 { + x := uint32(b ^ c) + x-- + return int32(x >> 31) +} + +// negative returns 1 if b < 0 and 0 otherwise. +func negative(b int32) int32 { + return (b >> 31) & 1 +} + +func PreComputedGroupElementCMove(t, u *PreComputedGroupElement, b int32) { + FeCMove(&t.yPlusX, &u.yPlusX, b) + FeCMove(&t.yMinusX, &u.yMinusX, b) + FeCMove(&t.xy2d, &u.xy2d, b) +} + +func selectPoint(t *PreComputedGroupElement, pos int32, b int32) { + var minusT PreComputedGroupElement + bNegative := negative(b) + bAbs := b - (((-bNegative) & b) << 1) + + t.Zero() + for i := int32(0); i < 8; i++ { + PreComputedGroupElementCMove(t, &base[pos][i], equal(bAbs, i+1)) + } + FeCopy(&minusT.yPlusX, &t.yMinusX) + FeCopy(&minusT.yMinusX, &t.yPlusX) + FeNeg(&minusT.xy2d, &t.xy2d) + PreComputedGroupElementCMove(t, &minusT, bNegative) +} + +// GeScalarMultBase computes h = a*B, where +// a = a[0]+256*a[1]+...+256^31 a[31] +// B is the Ed25519 base point (x,4/5) with x positive. +// +// Preconditions: +// a[31] <= 127 +func GeScalarMultBase(h *ExtendedGroupElement, a *[32]byte) { + var e [64]int8 + + for i, v := range a { + e[2*i] = int8(v & 15) + e[2*i+1] = int8((v >> 4) & 15) + } + + // each e[i] is between 0 and 15 and e[63] is between 0 and 7. + + carry := int8(0) + for i := 0; i < 63; i++ { + e[i] += carry + carry = (e[i] + 8) >> 4 + e[i] -= carry << 4 + } + e[63] += carry + // each e[i] is between -8 and 8. + + h.Zero() + var t PreComputedGroupElement + var r CompletedGroupElement + for i := int32(1); i < 64; i += 2 { + selectPoint(&t, i/2, int32(e[i])) + geMixedAdd(&r, h, &t) + r.ToExtended(h) + } + + var s ProjectiveGroupElement + + h.Double(&r) + r.ToProjective(&s) + s.Double(&r) + r.ToProjective(&s) + s.Double(&r) + r.ToProjective(&s) + s.Double(&r) + r.ToExtended(h) + + for i := int32(0); i < 64; i += 2 { + selectPoint(&t, i/2, int32(e[i])) + geMixedAdd(&r, h, &t) + r.ToExtended(h) + } +} + +// The scalars are GF(2^252 + 27742317777372353535851937790883648493). + +// Input: +// a[0]+256*a[1]+...+256^31*a[31] = a +// b[0]+256*b[1]+...+256^31*b[31] = b +// c[0]+256*c[1]+...+256^31*c[31] = c +// +// Output: +// s[0]+256*s[1]+...+256^31*s[31] = (ab+c) mod l +// where l = 2^252 + 27742317777372353535851937790883648493. +func ScMulAdd(s, a, b, c *[32]byte) { + a0 := 2097151 & load3(a[:]) + a1 := 2097151 & (load4(a[2:]) >> 5) + a2 := 2097151 & (load3(a[5:]) >> 2) + a3 := 2097151 & (load4(a[7:]) >> 7) + a4 := 2097151 & (load4(a[10:]) >> 4) + a5 := 2097151 & (load3(a[13:]) >> 1) + a6 := 2097151 & (load4(a[15:]) >> 6) + a7 := 2097151 & (load3(a[18:]) >> 3) + a8 := 2097151 & load3(a[21:]) + a9 := 2097151 & (load4(a[23:]) >> 5) + a10 := 2097151 & (load3(a[26:]) >> 2) + a11 := (load4(a[28:]) >> 7) + b0 := 2097151 & load3(b[:]) + b1 := 2097151 & (load4(b[2:]) >> 5) + b2 := 2097151 & (load3(b[5:]) >> 2) + b3 := 2097151 & (load4(b[7:]) >> 7) + b4 := 2097151 & (load4(b[10:]) >> 4) + b5 := 2097151 & (load3(b[13:]) >> 1) + b6 := 2097151 & (load4(b[15:]) >> 6) + b7 := 2097151 & (load3(b[18:]) >> 3) + b8 := 2097151 & load3(b[21:]) + b9 := 2097151 & (load4(b[23:]) >> 5) + b10 := 2097151 & (load3(b[26:]) >> 2) + b11 := (load4(b[28:]) >> 7) + c0 := 2097151 & load3(c[:]) + c1 := 2097151 & (load4(c[2:]) >> 5) + c2 := 2097151 & (load3(c[5:]) >> 2) + c3 := 2097151 & (load4(c[7:]) >> 7) + c4 := 2097151 & (load4(c[10:]) >> 4) + c5 := 2097151 & (load3(c[13:]) >> 1) + c6 := 2097151 & (load4(c[15:]) >> 6) + c7 := 2097151 & (load3(c[18:]) >> 3) + c8 := 2097151 & load3(c[21:]) + c9 := 2097151 & (load4(c[23:]) >> 5) + c10 := 2097151 & (load3(c[26:]) >> 2) + c11 := (load4(c[28:]) >> 7) + var carry [23]int64 + + s0 := c0 + a0*b0 + s1 := c1 + a0*b1 + a1*b0 + s2 := c2 + a0*b2 + a1*b1 + a2*b0 + s3 := c3 + a0*b3 + a1*b2 + a2*b1 + a3*b0 + s4 := c4 + a0*b4 + a1*b3 + a2*b2 + a3*b1 + a4*b0 + s5 := c5 + a0*b5 + a1*b4 + a2*b3 + a3*b2 + a4*b1 + a5*b0 + s6 := c6 + a0*b6 + a1*b5 + a2*b4 + a3*b3 + a4*b2 + a5*b1 + a6*b0 + s7 := c7 + a0*b7 + a1*b6 + a2*b5 + a3*b4 + a4*b3 + a5*b2 + a6*b1 + a7*b0 + s8 := c8 + a0*b8 + a1*b7 + a2*b6 + a3*b5 + a4*b4 + a5*b3 + a6*b2 + a7*b1 + a8*b0 + s9 := c9 + a0*b9 + a1*b8 + a2*b7 + a3*b6 + a4*b5 + a5*b4 + a6*b3 + a7*b2 + a8*b1 + a9*b0 + s10 := c10 + a0*b10 + a1*b9 + a2*b8 + a3*b7 + a4*b6 + a5*b5 + a6*b4 + a7*b3 + a8*b2 + a9*b1 + a10*b0 + s11 := c11 + a0*b11 + a1*b10 + a2*b9 + a3*b8 + a4*b7 + a5*b6 + a6*b5 + a7*b4 + a8*b3 + a9*b2 + a10*b1 + a11*b0 + s12 := a1*b11 + a2*b10 + a3*b9 + a4*b8 + a5*b7 + a6*b6 + a7*b5 + a8*b4 + a9*b3 + a10*b2 + a11*b1 + s13 := a2*b11 + a3*b10 + a4*b9 + a5*b8 + a6*b7 + a7*b6 + a8*b5 + a9*b4 + a10*b3 + a11*b2 + s14 := a3*b11 + a4*b10 + a5*b9 + a6*b8 + a7*b7 + a8*b6 + a9*b5 + a10*b4 + a11*b3 + s15 := a4*b11 + a5*b10 + a6*b9 + a7*b8 + a8*b7 + a9*b6 + a10*b5 + a11*b4 + s16 := a5*b11 + a6*b10 + a7*b9 + a8*b8 + a9*b7 + a10*b6 + a11*b5 + s17 := a6*b11 + a7*b10 + a8*b9 + a9*b8 + a10*b7 + a11*b6 + s18 := a7*b11 + a8*b10 + a9*b9 + a10*b8 + a11*b7 + s19 := a8*b11 + a9*b10 + a10*b9 + a11*b8 + s20 := a9*b11 + a10*b10 + a11*b9 + s21 := a10*b11 + a11*b10 + s22 := a11 * b11 + s23 := int64(0) + + carry[0] = (s0 + (1 << 20)) >> 21 + s1 += carry[0] + s0 -= carry[0] << 21 + carry[2] = (s2 + (1 << 20)) >> 21 + s3 += carry[2] + s2 -= carry[2] << 21 + carry[4] = (s4 + (1 << 20)) >> 21 + s5 += carry[4] + s4 -= carry[4] << 21 + carry[6] = (s6 + (1 << 20)) >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[8] = (s8 + (1 << 20)) >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[10] = (s10 + (1 << 20)) >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + carry[12] = (s12 + (1 << 20)) >> 21 + s13 += carry[12] + s12 -= carry[12] << 21 + carry[14] = (s14 + (1 << 20)) >> 21 + s15 += carry[14] + s14 -= carry[14] << 21 + carry[16] = (s16 + (1 << 20)) >> 21 + s17 += carry[16] + s16 -= carry[16] << 21 + carry[18] = (s18 + (1 << 20)) >> 21 + s19 += carry[18] + s18 -= carry[18] << 21 + carry[20] = (s20 + (1 << 20)) >> 21 + s21 += carry[20] + s20 -= carry[20] << 21 + carry[22] = (s22 + (1 << 20)) >> 21 + s23 += carry[22] + s22 -= carry[22] << 21 + + carry[1] = (s1 + (1 << 20)) >> 21 + s2 += carry[1] + s1 -= carry[1] << 21 + carry[3] = (s3 + (1 << 20)) >> 21 + s4 += carry[3] + s3 -= carry[3] << 21 + carry[5] = (s5 + (1 << 20)) >> 21 + s6 += carry[5] + s5 -= carry[5] << 21 + carry[7] = (s7 + (1 << 20)) >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[9] = (s9 + (1 << 20)) >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[11] = (s11 + (1 << 20)) >> 21 + s12 += carry[11] + s11 -= carry[11] << 21 + carry[13] = (s13 + (1 << 20)) >> 21 + s14 += carry[13] + s13 -= carry[13] << 21 + carry[15] = (s15 + (1 << 20)) >> 21 + s16 += carry[15] + s15 -= carry[15] << 21 + carry[17] = (s17 + (1 << 20)) >> 21 + s18 += carry[17] + s17 -= carry[17] << 21 + carry[19] = (s19 + (1 << 20)) >> 21 + s20 += carry[19] + s19 -= carry[19] << 21 + carry[21] = (s21 + (1 << 20)) >> 21 + s22 += carry[21] + s21 -= carry[21] << 21 + + s11 += s23 * 666643 + s12 += s23 * 470296 + s13 += s23 * 654183 + s14 -= s23 * 997805 + s15 += s23 * 136657 + s16 -= s23 * 683901 + s23 = 0 + + s10 += s22 * 666643 + s11 += s22 * 470296 + s12 += s22 * 654183 + s13 -= s22 * 997805 + s14 += s22 * 136657 + s15 -= s22 * 683901 + s22 = 0 + + s9 += s21 * 666643 + s10 += s21 * 470296 + s11 += s21 * 654183 + s12 -= s21 * 997805 + s13 += s21 * 136657 + s14 -= s21 * 683901 + s21 = 0 + + s8 += s20 * 666643 + s9 += s20 * 470296 + s10 += s20 * 654183 + s11 -= s20 * 997805 + s12 += s20 * 136657 + s13 -= s20 * 683901 + s20 = 0 + + s7 += s19 * 666643 + s8 += s19 * 470296 + s9 += s19 * 654183 + s10 -= s19 * 997805 + s11 += s19 * 136657 + s12 -= s19 * 683901 + s19 = 0 + + s6 += s18 * 666643 + s7 += s18 * 470296 + s8 += s18 * 654183 + s9 -= s18 * 997805 + s10 += s18 * 136657 + s11 -= s18 * 683901 + s18 = 0 + + carry[6] = (s6 + (1 << 20)) >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[8] = (s8 + (1 << 20)) >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[10] = (s10 + (1 << 20)) >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + carry[12] = (s12 + (1 << 20)) >> 21 + s13 += carry[12] + s12 -= carry[12] << 21 + carry[14] = (s14 + (1 << 20)) >> 21 + s15 += carry[14] + s14 -= carry[14] << 21 + carry[16] = (s16 + (1 << 20)) >> 21 + s17 += carry[16] + s16 -= carry[16] << 21 + + carry[7] = (s7 + (1 << 20)) >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[9] = (s9 + (1 << 20)) >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[11] = (s11 + (1 << 20)) >> 21 + s12 += carry[11] + s11 -= carry[11] << 21 + carry[13] = (s13 + (1 << 20)) >> 21 + s14 += carry[13] + s13 -= carry[13] << 21 + carry[15] = (s15 + (1 << 20)) >> 21 + s16 += carry[15] + s15 -= carry[15] << 21 + + s5 += s17 * 666643 + s6 += s17 * 470296 + s7 += s17 * 654183 + s8 -= s17 * 997805 + s9 += s17 * 136657 + s10 -= s17 * 683901 + s17 = 0 + + s4 += s16 * 666643 + s5 += s16 * 470296 + s6 += s16 * 654183 + s7 -= s16 * 997805 + s8 += s16 * 136657 + s9 -= s16 * 683901 + s16 = 0 + + s3 += s15 * 666643 + s4 += s15 * 470296 + s5 += s15 * 654183 + s6 -= s15 * 997805 + s7 += s15 * 136657 + s8 -= s15 * 683901 + s15 = 0 + + s2 += s14 * 666643 + s3 += s14 * 470296 + s4 += s14 * 654183 + s5 -= s14 * 997805 + s6 += s14 * 136657 + s7 -= s14 * 683901 + s14 = 0 + + s1 += s13 * 666643 + s2 += s13 * 470296 + s3 += s13 * 654183 + s4 -= s13 * 997805 + s5 += s13 * 136657 + s6 -= s13 * 683901 + s13 = 0 + + s0 += s12 * 666643 + s1 += s12 * 470296 + s2 += s12 * 654183 + s3 -= s12 * 997805 + s4 += s12 * 136657 + s5 -= s12 * 683901 + s12 = 0 + + carry[0] = (s0 + (1 << 20)) >> 21 + s1 += carry[0] + s0 -= carry[0] << 21 + carry[2] = (s2 + (1 << 20)) >> 21 + s3 += carry[2] + s2 -= carry[2] << 21 + carry[4] = (s4 + (1 << 20)) >> 21 + s5 += carry[4] + s4 -= carry[4] << 21 + carry[6] = (s6 + (1 << 20)) >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[8] = (s8 + (1 << 20)) >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[10] = (s10 + (1 << 20)) >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + + carry[1] = (s1 + (1 << 20)) >> 21 + s2 += carry[1] + s1 -= carry[1] << 21 + carry[3] = (s3 + (1 << 20)) >> 21 + s4 += carry[3] + s3 -= carry[3] << 21 + carry[5] = (s5 + (1 << 20)) >> 21 + s6 += carry[5] + s5 -= carry[5] << 21 + carry[7] = (s7 + (1 << 20)) >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[9] = (s9 + (1 << 20)) >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[11] = (s11 + (1 << 20)) >> 21 + s12 += carry[11] + s11 -= carry[11] << 21 + + s0 += s12 * 666643 + s1 += s12 * 470296 + s2 += s12 * 654183 + s3 -= s12 * 997805 + s4 += s12 * 136657 + s5 -= s12 * 683901 + s12 = 0 + + carry[0] = s0 >> 21 + s1 += carry[0] + s0 -= carry[0] << 21 + carry[1] = s1 >> 21 + s2 += carry[1] + s1 -= carry[1] << 21 + carry[2] = s2 >> 21 + s3 += carry[2] + s2 -= carry[2] << 21 + carry[3] = s3 >> 21 + s4 += carry[3] + s3 -= carry[3] << 21 + carry[4] = s4 >> 21 + s5 += carry[4] + s4 -= carry[4] << 21 + carry[5] = s5 >> 21 + s6 += carry[5] + s5 -= carry[5] << 21 + carry[6] = s6 >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[7] = s7 >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[8] = s8 >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[9] = s9 >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[10] = s10 >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + carry[11] = s11 >> 21 + s12 += carry[11] + s11 -= carry[11] << 21 + + s0 += s12 * 666643 + s1 += s12 * 470296 + s2 += s12 * 654183 + s3 -= s12 * 997805 + s4 += s12 * 136657 + s5 -= s12 * 683901 + s12 = 0 + + carry[0] = s0 >> 21 + s1 += carry[0] + s0 -= carry[0] << 21 + carry[1] = s1 >> 21 + s2 += carry[1] + s1 -= carry[1] << 21 + carry[2] = s2 >> 21 + s3 += carry[2] + s2 -= carry[2] << 21 + carry[3] = s3 >> 21 + s4 += carry[3] + s3 -= carry[3] << 21 + carry[4] = s4 >> 21 + s5 += carry[4] + s4 -= carry[4] << 21 + carry[5] = s5 >> 21 + s6 += carry[5] + s5 -= carry[5] << 21 + carry[6] = s6 >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[7] = s7 >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[8] = s8 >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[9] = s9 >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[10] = s10 >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + + s[0] = byte(s0 >> 0) + s[1] = byte(s0 >> 8) + s[2] = byte((s0 >> 16) | (s1 << 5)) + s[3] = byte(s1 >> 3) + s[4] = byte(s1 >> 11) + s[5] = byte((s1 >> 19) | (s2 << 2)) + s[6] = byte(s2 >> 6) + s[7] = byte((s2 >> 14) | (s3 << 7)) + s[8] = byte(s3 >> 1) + s[9] = byte(s3 >> 9) + s[10] = byte((s3 >> 17) | (s4 << 4)) + s[11] = byte(s4 >> 4) + s[12] = byte(s4 >> 12) + s[13] = byte((s4 >> 20) | (s5 << 1)) + s[14] = byte(s5 >> 7) + s[15] = byte((s5 >> 15) | (s6 << 6)) + s[16] = byte(s6 >> 2) + s[17] = byte(s6 >> 10) + s[18] = byte((s6 >> 18) | (s7 << 3)) + s[19] = byte(s7 >> 5) + s[20] = byte(s7 >> 13) + s[21] = byte(s8 >> 0) + s[22] = byte(s8 >> 8) + s[23] = byte((s8 >> 16) | (s9 << 5)) + s[24] = byte(s9 >> 3) + s[25] = byte(s9 >> 11) + s[26] = byte((s9 >> 19) | (s10 << 2)) + s[27] = byte(s10 >> 6) + s[28] = byte((s10 >> 14) | (s11 << 7)) + s[29] = byte(s11 >> 1) + s[30] = byte(s11 >> 9) + s[31] = byte(s11 >> 17) +} + +// Input: +// s[0]+256*s[1]+...+256^63*s[63] = s +// +// Output: +// s[0]+256*s[1]+...+256^31*s[31] = s mod l +// where l = 2^252 + 27742317777372353535851937790883648493. +func ScReduce(out *[32]byte, s *[64]byte) { + s0 := 2097151 & load3(s[:]) + s1 := 2097151 & (load4(s[2:]) >> 5) + s2 := 2097151 & (load3(s[5:]) >> 2) + s3 := 2097151 & (load4(s[7:]) >> 7) + s4 := 2097151 & (load4(s[10:]) >> 4) + s5 := 2097151 & (load3(s[13:]) >> 1) + s6 := 2097151 & (load4(s[15:]) >> 6) + s7 := 2097151 & (load3(s[18:]) >> 3) + s8 := 2097151 & load3(s[21:]) + s9 := 2097151 & (load4(s[23:]) >> 5) + s10 := 2097151 & (load3(s[26:]) >> 2) + s11 := 2097151 & (load4(s[28:]) >> 7) + s12 := 2097151 & (load4(s[31:]) >> 4) + s13 := 2097151 & (load3(s[34:]) >> 1) + s14 := 2097151 & (load4(s[36:]) >> 6) + s15 := 2097151 & (load3(s[39:]) >> 3) + s16 := 2097151 & load3(s[42:]) + s17 := 2097151 & (load4(s[44:]) >> 5) + s18 := 2097151 & (load3(s[47:]) >> 2) + s19 := 2097151 & (load4(s[49:]) >> 7) + s20 := 2097151 & (load4(s[52:]) >> 4) + s21 := 2097151 & (load3(s[55:]) >> 1) + s22 := 2097151 & (load4(s[57:]) >> 6) + s23 := (load4(s[60:]) >> 3) + + s11 += s23 * 666643 + s12 += s23 * 470296 + s13 += s23 * 654183 + s14 -= s23 * 997805 + s15 += s23 * 136657 + s16 -= s23 * 683901 + s23 = 0 + + s10 += s22 * 666643 + s11 += s22 * 470296 + s12 += s22 * 654183 + s13 -= s22 * 997805 + s14 += s22 * 136657 + s15 -= s22 * 683901 + s22 = 0 + + s9 += s21 * 666643 + s10 += s21 * 470296 + s11 += s21 * 654183 + s12 -= s21 * 997805 + s13 += s21 * 136657 + s14 -= s21 * 683901 + s21 = 0 + + s8 += s20 * 666643 + s9 += s20 * 470296 + s10 += s20 * 654183 + s11 -= s20 * 997805 + s12 += s20 * 136657 + s13 -= s20 * 683901 + s20 = 0 + + s7 += s19 * 666643 + s8 += s19 * 470296 + s9 += s19 * 654183 + s10 -= s19 * 997805 + s11 += s19 * 136657 + s12 -= s19 * 683901 + s19 = 0 + + s6 += s18 * 666643 + s7 += s18 * 470296 + s8 += s18 * 654183 + s9 -= s18 * 997805 + s10 += s18 * 136657 + s11 -= s18 * 683901 + s18 = 0 + + var carry [17]int64 + + carry[6] = (s6 + (1 << 20)) >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[8] = (s8 + (1 << 20)) >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[10] = (s10 + (1 << 20)) >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + carry[12] = (s12 + (1 << 20)) >> 21 + s13 += carry[12] + s12 -= carry[12] << 21 + carry[14] = (s14 + (1 << 20)) >> 21 + s15 += carry[14] + s14 -= carry[14] << 21 + carry[16] = (s16 + (1 << 20)) >> 21 + s17 += carry[16] + s16 -= carry[16] << 21 + + carry[7] = (s7 + (1 << 20)) >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[9] = (s9 + (1 << 20)) >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[11] = (s11 + (1 << 20)) >> 21 + s12 += carry[11] + s11 -= carry[11] << 21 + carry[13] = (s13 + (1 << 20)) >> 21 + s14 += carry[13] + s13 -= carry[13] << 21 + carry[15] = (s15 + (1 << 20)) >> 21 + s16 += carry[15] + s15 -= carry[15] << 21 + + s5 += s17 * 666643 + s6 += s17 * 470296 + s7 += s17 * 654183 + s8 -= s17 * 997805 + s9 += s17 * 136657 + s10 -= s17 * 683901 + s17 = 0 + + s4 += s16 * 666643 + s5 += s16 * 470296 + s6 += s16 * 654183 + s7 -= s16 * 997805 + s8 += s16 * 136657 + s9 -= s16 * 683901 + s16 = 0 + + s3 += s15 * 666643 + s4 += s15 * 470296 + s5 += s15 * 654183 + s6 -= s15 * 997805 + s7 += s15 * 136657 + s8 -= s15 * 683901 + s15 = 0 + + s2 += s14 * 666643 + s3 += s14 * 470296 + s4 += s14 * 654183 + s5 -= s14 * 997805 + s6 += s14 * 136657 + s7 -= s14 * 683901 + s14 = 0 + + s1 += s13 * 666643 + s2 += s13 * 470296 + s3 += s13 * 654183 + s4 -= s13 * 997805 + s5 += s13 * 136657 + s6 -= s13 * 683901 + s13 = 0 + + s0 += s12 * 666643 + s1 += s12 * 470296 + s2 += s12 * 654183 + s3 -= s12 * 997805 + s4 += s12 * 136657 + s5 -= s12 * 683901 + s12 = 0 + + carry[0] = (s0 + (1 << 20)) >> 21 + s1 += carry[0] + s0 -= carry[0] << 21 + carry[2] = (s2 + (1 << 20)) >> 21 + s3 += carry[2] + s2 -= carry[2] << 21 + carry[4] = (s4 + (1 << 20)) >> 21 + s5 += carry[4] + s4 -= carry[4] << 21 + carry[6] = (s6 + (1 << 20)) >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[8] = (s8 + (1 << 20)) >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[10] = (s10 + (1 << 20)) >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + + carry[1] = (s1 + (1 << 20)) >> 21 + s2 += carry[1] + s1 -= carry[1] << 21 + carry[3] = (s3 + (1 << 20)) >> 21 + s4 += carry[3] + s3 -= carry[3] << 21 + carry[5] = (s5 + (1 << 20)) >> 21 + s6 += carry[5] + s5 -= carry[5] << 21 + carry[7] = (s7 + (1 << 20)) >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[9] = (s9 + (1 << 20)) >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[11] = (s11 + (1 << 20)) >> 21 + s12 += carry[11] + s11 -= carry[11] << 21 + + s0 += s12 * 666643 + s1 += s12 * 470296 + s2 += s12 * 654183 + s3 -= s12 * 997805 + s4 += s12 * 136657 + s5 -= s12 * 683901 + s12 = 0 + + carry[0] = s0 >> 21 + s1 += carry[0] + s0 -= carry[0] << 21 + carry[1] = s1 >> 21 + s2 += carry[1] + s1 -= carry[1] << 21 + carry[2] = s2 >> 21 + s3 += carry[2] + s2 -= carry[2] << 21 + carry[3] = s3 >> 21 + s4 += carry[3] + s3 -= carry[3] << 21 + carry[4] = s4 >> 21 + s5 += carry[4] + s4 -= carry[4] << 21 + carry[5] = s5 >> 21 + s6 += carry[5] + s5 -= carry[5] << 21 + carry[6] = s6 >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[7] = s7 >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[8] = s8 >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[9] = s9 >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[10] = s10 >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + carry[11] = s11 >> 21 + s12 += carry[11] + s11 -= carry[11] << 21 + + s0 += s12 * 666643 + s1 += s12 * 470296 + s2 += s12 * 654183 + s3 -= s12 * 997805 + s4 += s12 * 136657 + s5 -= s12 * 683901 + s12 = 0 + + carry[0] = s0 >> 21 + s1 += carry[0] + s0 -= carry[0] << 21 + carry[1] = s1 >> 21 + s2 += carry[1] + s1 -= carry[1] << 21 + carry[2] = s2 >> 21 + s3 += carry[2] + s2 -= carry[2] << 21 + carry[3] = s3 >> 21 + s4 += carry[3] + s3 -= carry[3] << 21 + carry[4] = s4 >> 21 + s5 += carry[4] + s4 -= carry[4] << 21 + carry[5] = s5 >> 21 + s6 += carry[5] + s5 -= carry[5] << 21 + carry[6] = s6 >> 21 + s7 += carry[6] + s6 -= carry[6] << 21 + carry[7] = s7 >> 21 + s8 += carry[7] + s7 -= carry[7] << 21 + carry[8] = s8 >> 21 + s9 += carry[8] + s8 -= carry[8] << 21 + carry[9] = s9 >> 21 + s10 += carry[9] + s9 -= carry[9] << 21 + carry[10] = s10 >> 21 + s11 += carry[10] + s10 -= carry[10] << 21 + + out[0] = byte(s0 >> 0) + out[1] = byte(s0 >> 8) + out[2] = byte((s0 >> 16) | (s1 << 5)) + out[3] = byte(s1 >> 3) + out[4] = byte(s1 >> 11) + out[5] = byte((s1 >> 19) | (s2 << 2)) + out[6] = byte(s2 >> 6) + out[7] = byte((s2 >> 14) | (s3 << 7)) + out[8] = byte(s3 >> 1) + out[9] = byte(s3 >> 9) + out[10] = byte((s3 >> 17) | (s4 << 4)) + out[11] = byte(s4 >> 4) + out[12] = byte(s4 >> 12) + out[13] = byte((s4 >> 20) | (s5 << 1)) + out[14] = byte(s5 >> 7) + out[15] = byte((s5 >> 15) | (s6 << 6)) + out[16] = byte(s6 >> 2) + out[17] = byte(s6 >> 10) + out[18] = byte((s6 >> 18) | (s7 << 3)) + out[19] = byte(s7 >> 5) + out[20] = byte(s7 >> 13) + out[21] = byte(s8 >> 0) + out[22] = byte(s8 >> 8) + out[23] = byte((s8 >> 16) | (s9 << 5)) + out[24] = byte(s9 >> 3) + out[25] = byte(s9 >> 11) + out[26] = byte((s9 >> 19) | (s10 << 2)) + out[27] = byte(s10 >> 6) + out[28] = byte((s10 >> 14) | (s11 << 7)) + out[29] = byte(s11 >> 1) + out[30] = byte(s11 >> 9) + out[31] = byte(s11 >> 17) +} diff --git a/vendor/golang.org/x/crypto/openpgp/armor/armor.go b/vendor/github.com/keybase/go-crypto/openpgp/armor/armor.go similarity index 82% rename from vendor/golang.org/x/crypto/openpgp/armor/armor.go rename to vendor/github.com/keybase/go-crypto/openpgp/armor/armor.go index 592d18643..9513a0905 100644 --- a/vendor/golang.org/x/crypto/openpgp/armor/armor.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/armor/armor.go @@ -4,14 +4,17 @@ // Package armor implements OpenPGP ASCII Armor, see RFC 4880. OpenPGP Armor is // very similar to PEM except that it has an additional CRC checksum. -package armor // import "golang.org/x/crypto/openpgp/armor" +package armor // import "github.com/keybase/go-crypto/openpgp/armor" import ( "bufio" "bytes" "encoding/base64" - "golang.org/x/crypto/openpgp/errors" "io" + "strings" + "unicode" + + "github.com/keybase/go-crypto/openpgp/errors" ) // A Block represents an OpenPGP armored structure. @@ -65,7 +68,14 @@ type lineReader struct { in *bufio.Reader buf []byte eof bool - crc uint32 + crc *uint32 +} + +// ourIsSpace checks if a rune is either space according to unicode +// package, or ZeroWidthSpace (which is not a space according to +// unicode module). Used to trim lines during header reading. +func ourIsSpace(r rune) bool { + return r == '\u200b' || unicode.IsSpace(r) } func (l *lineReader) Read(p []byte) (n int, err error) { @@ -79,13 +89,12 @@ func (l *lineReader) Read(p []byte) (n int, err error) { return } - line, isPrefix, err := l.in.ReadLine() + line, _, err := l.in.ReadLine() if err != nil { return } - if isPrefix { - return 0, ArmorCorrupt - } + + line = bytes.TrimFunc(line, ourIsSpace) if len(line) == 5 && line[0] == '=' { // This is the checksum line @@ -95,13 +104,19 @@ func (l *lineReader) Read(p []byte) (n int, err error) { if m != 3 || err != nil { return } - l.crc = uint32(expectedBytes[0])<<16 | + crc := uint32(expectedBytes[0])<<16 | uint32(expectedBytes[1])<<8 | uint32(expectedBytes[2]) + l.crc = &crc - line, _, err = l.in.ReadLine() - if err != nil && err != io.EOF { - return + for { + line, _, err = l.in.ReadLine() + if err != nil && err != io.EOF { + return + } + if len(strings.TrimSpace(string(line))) > 0 { + break + } } if !bytes.HasPrefix(line, armorEnd) { return 0, ArmorCorrupt @@ -111,8 +126,11 @@ func (l *lineReader) Read(p []byte) (n int, err error) { return 0, io.EOF } - if len(line) > 96 { - return 0, ArmorCorrupt + if bytes.HasPrefix(line, armorEnd) { + // Unexpected ending, there was no checksum. + l.eof = true + l.crc = nil + return 0, io.EOF } n = copy(p, line) @@ -142,7 +160,7 @@ func (r *openpgpReader) Read(p []byte) (n int, err error) { r.currentCRC = crc24(r.currentCRC, p[:n]) if err == io.EOF { - if r.lReader.crc != uint32(r.currentCRC&crc24Mask) { + if r.lReader.crc != nil && *r.lReader.crc != uint32(r.currentCRC&crc24Mask) { return 0, ArmorCorrupt } } @@ -196,7 +214,7 @@ TryNextBlock: p.Header[lastKey] += string(line) continue } - line = bytes.TrimSpace(line) + line = bytes.TrimFunc(line, ourIsSpace) if len(line) == 0 { break } diff --git a/vendor/golang.org/x/crypto/openpgp/armor/encode.go b/vendor/github.com/keybase/go-crypto/openpgp/armor/encode.go similarity index 98% rename from vendor/golang.org/x/crypto/openpgp/armor/encode.go rename to vendor/github.com/keybase/go-crypto/openpgp/armor/encode.go index 6f07582c3..075a1978e 100644 --- a/vendor/golang.org/x/crypto/openpgp/armor/encode.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/armor/encode.go @@ -125,7 +125,7 @@ func (e *encoding) Close() (err error) { var b64ChecksumBytes [4]byte base64.StdEncoding.Encode(b64ChecksumBytes[:], checksumBytes[:]) - return writeSlices(e.out, blockEnd, b64ChecksumBytes[:], newline, armorEnd, e.blockType, armorEndOfLine) + return writeSlices(e.out, blockEnd, b64ChecksumBytes[:], newline, armorEnd, e.blockType, armorEndOfLine, []byte{'\n'}) } // Encode returns a WriteCloser which will encode the data written to it in diff --git a/vendor/golang.org/x/crypto/openpgp/canonical_text.go b/vendor/github.com/keybase/go-crypto/openpgp/canonical_text.go similarity index 100% rename from vendor/golang.org/x/crypto/openpgp/canonical_text.go rename to vendor/github.com/keybase/go-crypto/openpgp/canonical_text.go diff --git a/vendor/github.com/keybase/go-crypto/openpgp/ecdh/ecdh.go b/vendor/github.com/keybase/go-crypto/openpgp/ecdh/ecdh.go new file mode 100644 index 000000000..64c18d0b3 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/openpgp/ecdh/ecdh.go @@ -0,0 +1,282 @@ +package ecdh + +import ( + "bytes" + "crypto" + "crypto/aes" + "crypto/elliptic" + "encoding/binary" + "errors" + "github.com/keybase/go-crypto/curve25519" + "io" + "math/big" +) + +type PublicKey struct { + elliptic.Curve + X, Y *big.Int +} + +type PrivateKey struct { + PublicKey + X *big.Int +} + +// KDF implements Key Derivation Function as described in +// https://tools.ietf.org/html/rfc6637#section-7 +func (e *PublicKey) KDF(S []byte, kdfParams []byte, hash crypto.Hash) []byte { + sLen := (e.Curve.Params().P.BitLen() + 7) / 8 + buf := new(bytes.Buffer) + buf.Write([]byte{0, 0, 0, 1}) + if sLen > len(S) { + // zero-pad the S. If we got invalid S (bigger than curve's + // P), we are going to produce invalid key. Garbage in, + // garbage out. + buf.Write(make([]byte, sLen-len(S))) + } + buf.Write(S) + buf.Write(kdfParams) + + hashw := hash.New() + + hashw.Write(buf.Bytes()) + key := hashw.Sum(nil) + + return key +} + +// AESKeyUnwrap implements RFC 3394 Key Unwrapping. See +// http://tools.ietf.org/html/rfc3394#section-2.2.1 +// Note: The second described algorithm ("index-based") is implemented +// here. +func AESKeyUnwrap(key, cipherText []byte) ([]byte, error) { + if len(cipherText)%8 != 0 { + return nil, errors.New("cipherText must by a multiple of 64 bits") + } + + cipher, err := aes.NewCipher(key) + if err != nil { + return nil, err + } + + nblocks := len(cipherText)/8 - 1 + + // 1) Initialize variables. + // - Set A = C[0] + var A [aes.BlockSize]byte + copy(A[:8], cipherText[:8]) + + // For i = 1 to n + // Set R[i] = C[i] + R := make([]byte, len(cipherText)-8) + copy(R, cipherText[8:]) + + // 2) Compute intermediate values. + for j := 5; j >= 0; j-- { + for i := nblocks - 1; i >= 0; i-- { + // B = AES-1(K, (A ^ t) | R[i]) where t = n*j+i + // A = MSB(64, B) + t := uint64(nblocks*j + i + 1) + At := binary.BigEndian.Uint64(A[:8]) ^ t + binary.BigEndian.PutUint64(A[:8], At) + + copy(A[8:], R[i*8:i*8+8]) + cipher.Decrypt(A[:], A[:]) + + // R[i] = LSB(B, 64) + copy(R[i*8:i*8+8], A[8:]) + } + } + + // 3) Output results. + // If A is an appropriate initial value (see 2.2.3), + for i := 0; i < 8; i++ { + if A[i] != 0xA6 { + return nil, errors.New("Failed to unwrap key (A is not IV)") + } + } + + return R, nil +} + +// AESKeyWrap implements RFC 3394 Key Wrapping. See +// https://tools.ietf.org/html/rfc3394#section-2.2.2 +// Note: The second described algorithm ("index-based") is implemented +// here. +func AESKeyWrap(key, plainText []byte) ([]byte, error) { + if len(plainText)%8 != 0 { + return nil, errors.New("plainText must be a multiple of 64 bits") + } + + cipher, err := aes.NewCipher(key) // NewCipher checks key size + if err != nil { + return nil, err + } + + nblocks := len(plainText) / 8 + + // 1) Initialize variables. + var A [aes.BlockSize]byte + // Section 2.2.3.1 -- Initial Value + // http://tools.ietf.org/html/rfc3394#section-2.2.3.1 + for i := 0; i < 8; i++ { + A[i] = 0xA6 + } + + // For i = 1 to n + // Set R[i] = P[i] + R := make([]byte, len(plainText)) + copy(R, plainText) + + // 2) Calculate intermediate values. + for j := 0; j <= 5; j++ { + for i := 0; i < nblocks; i++ { + // B = AES(K, A | R[i]) + copy(A[8:], R[i*8:i*8+8]) + cipher.Encrypt(A[:], A[:]) + + // (Assume B = A) + // A = MSB(64, B) ^ t where t = (n*j)+1 + t := uint64(j*nblocks + i + 1) + At := binary.BigEndian.Uint64(A[:8]) ^ t + binary.BigEndian.PutUint64(A[:8], At) + + // R[i] = LSB(64, B) + copy(R[i*8:i*8+8], A[8:]) + } + } + + // 3) Output results. + // Set C[0] = A + // For i = 1 to n + // C[i] = R[i] + return append(A[:8], R...), nil +} + +// PadBuffer pads byte buffer buf to a length being multiple of +// blockLen. Additional bytes appended to the buffer have value of the +// number padded bytes. E.g. if the buffer is 3 bytes short of being +// 40 bytes total, the appended bytes will be [03, 03, 03]. +func PadBuffer(buf []byte, blockLen int) []byte { + padding := blockLen - (len(buf) % blockLen) + if padding == 0 { + return buf + } + + padBuf := make([]byte, padding) + for i := 0; i < padding; i++ { + padBuf[i] = byte(padding) + } + + return append(buf, padBuf...) +} + +// UnpadBuffer verifies that buffer contains proper padding and +// returns buffer without the padding, or nil if the padding was +// invalid. +func UnpadBuffer(buf []byte, dataLen int) []byte { + padding := len(buf) - dataLen + outBuf := buf[:dataLen] + + for i := dataLen; i < len(buf); i++ { + if buf[i] != byte(padding) { + // Invalid padding - bail out + return nil + } + } + + return outBuf +} + +func (e *PublicKey) Encrypt(random io.Reader, kdfParams []byte, plain []byte, hash crypto.Hash, kdfKeySize int) (Vx *big.Int, Vy *big.Int, C []byte, err error) { + // Vx, Vy - encryption key + + // Note for Curve 25519 - curve25519 library already does key + // clamping in scalarMult, so we can use generic random scalar + // generation from elliptic. + priv, Vx, Vy, err := elliptic.GenerateKey(e.Curve, random) + if err != nil { + return nil, nil, nil, err + } + + // Sx, Sy - shared secret + Sx, _ := e.Curve.ScalarMult(e.X, e.Y, priv) + + // Encrypt the payload with KDF-ed S as the encryption key. Pass + // the ciphertext along with V to the recipient. Recipient can + // generate S using V and their priv key, and then KDF(S), on + // their own, to get encryption key and decrypt the ciphertext, + // revealing encryption key for symmetric encryption later. + + plain = PadBuffer(plain, 8) + key := e.KDF(Sx.Bytes(), kdfParams, hash) + + // Take only as many bytes from key as the key length (the hash + // result might be bigger) + encrypted, err := AESKeyWrap(key[:kdfKeySize], plain) + + return Vx, Vy, encrypted, nil +} + +func (e *PrivateKey) DecryptShared(X, Y *big.Int) []byte { + Sx, _ := e.Curve.ScalarMult(X, Y, e.X.Bytes()) + return Sx.Bytes() +} + +func countBits(buffer []byte) int { + var headerLen int + switch buffer[0] { + case 0x4: + headerLen = 3 + case 0x40: + headerLen = 7 + default: + // Unexpected header - but we can still count the bits. + val := buffer[0] + headerLen = 0 + for val > 0 { + val = val / 2 + headerLen++ + } + } + + return headerLen + (len(buffer)-1)*8 +} + +// elliptic.Marshal and elliptic.Unmarshal only marshals uncompressed +// 0x4 MPI types. These functions will check if the curve is cv25519, +// and if so, use 0x40 compressed type to (un)marshal. Otherwise, +// elliptic.(Un)marshal will be called. + +// Marshal encodes point into either 0x4 uncompressed point form, or +// 0x40 compressed point for Curve 25519. +func Marshal(curve elliptic.Curve, x, y *big.Int) (buf []byte, bitSize int) { + // NOTE: Read more about MPI encoding in the RFC: + // https://tools.ietf.org/html/rfc4880#section-3.2 + + // We are required to encode size in bits, counting from the most- + // significant non-zero bit. So assuming that the buffer never + // starts with 0x00, we only need to count bits in the first byte + // - and in current implentation it will always be 0x4 or 0x40. + + cv, ok := curve25519.ToCurve25519(curve) + if ok { + buf = cv.MarshalType40(x, y) + } else { + buf = elliptic.Marshal(curve, x, y) + } + + return buf, countBits(buf) +} + +// Unmarshal converts point, serialized by Marshal, into x, y pair. +// For 0x40 compressed points (for Curve 25519), y will always be 0. +// It is an error if point is not on the curve, On error, x = nil. +func Unmarshal(curve elliptic.Curve, data []byte) (x, y *big.Int) { + cv, ok := curve25519.ToCurve25519(curve) + if ok { + return cv.UnmarshalType40(data) + } + + return elliptic.Unmarshal(curve, data) +} diff --git a/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go b/vendor/github.com/keybase/go-crypto/openpgp/elgamal/elgamal.go similarity index 97% rename from vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go rename to vendor/github.com/keybase/go-crypto/openpgp/elgamal/elgamal.go index 73f4fe378..15dafc556 100644 --- a/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/elgamal/elgamal.go @@ -10,7 +10,7 @@ // This form of ElGamal embeds PKCS#1 v1.5 padding, which may make it // unsuitable for other protocols. RSA should be used in preference in any // case. -package elgamal // import "golang.org/x/crypto/openpgp/elgamal" +package elgamal // import "github.com/keybase/go-crypto/openpgp/elgamal" import ( "crypto/rand" diff --git a/vendor/golang.org/x/crypto/openpgp/errors/errors.go b/vendor/github.com/keybase/go-crypto/openpgp/errors/errors.go similarity index 96% rename from vendor/golang.org/x/crypto/openpgp/errors/errors.go rename to vendor/github.com/keybase/go-crypto/openpgp/errors/errors.go index eb0550b2d..d48c6c9b6 100644 --- a/vendor/golang.org/x/crypto/openpgp/errors/errors.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/errors/errors.go @@ -3,7 +3,7 @@ // license that can be found in the LICENSE file. // Package errors contains common error types for the OpenPGP packages. -package errors // import "golang.org/x/crypto/openpgp/errors" +package errors // import "github.com/keybase/go-crypto/openpgp/errors" import ( "strconv" diff --git a/vendor/github.com/keybase/go-crypto/openpgp/keys.go b/vendor/github.com/keybase/go-crypto/openpgp/keys.go new file mode 100644 index 000000000..e1a458879 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/openpgp/keys.go @@ -0,0 +1,902 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package openpgp + +import ( + "crypto/hmac" + "encoding/binary" + "io" + "time" + + "github.com/keybase/go-crypto/openpgp/armor" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/packet" + "github.com/keybase/go-crypto/rsa" +) + +// PublicKeyType is the armor type for a PGP public key. +var PublicKeyType = "PGP PUBLIC KEY BLOCK" + +// PrivateKeyType is the armor type for a PGP private key. +var PrivateKeyType = "PGP PRIVATE KEY BLOCK" + +// An Entity represents the components of an OpenPGP key: a primary public key +// (which must be a signing key), one or more identities claimed by that key, +// and zero or more subkeys, which may be encryption keys. +type Entity struct { + PrimaryKey *packet.PublicKey + PrivateKey *packet.PrivateKey + Identities map[string]*Identity // indexed by Identity.Name + Revocations []*packet.Signature + // Revocations that are signed by designated revokers. Reading keys + // will not verify these revocations, because it won't have access to + // issuers' public keys, API consumers should do this instead (or + // not, and just assume that the key is probably revoked). + UnverifiedRevocations []*packet.Signature + Subkeys []Subkey + BadSubkeys []BadSubkey +} + +// An Identity represents an identity claimed by an Entity and zero or more +// assertions by other entities about that claim. +type Identity struct { + Name string // by convention, has the form "Full Name (comment) " + UserId *packet.UserId + SelfSignature *packet.Signature + Signatures []*packet.Signature + Revocation *packet.Signature +} + +// A Subkey is an additional public key in an Entity. Subkeys can be used for +// encryption. +type Subkey struct { + PublicKey *packet.PublicKey + PrivateKey *packet.PrivateKey + Sig *packet.Signature + Revocation *packet.Signature +} + +// BadSubkey is one that failed reconstruction, but we'll keep it around for +// informational purposes. +type BadSubkey struct { + Subkey + Err error +} + +// A Key identifies a specific public key in an Entity. This is either the +// Entity's primary key or a subkey. +type Key struct { + Entity *Entity + PublicKey *packet.PublicKey + PrivateKey *packet.PrivateKey + SelfSignature *packet.Signature + KeyFlags packet.KeyFlagBits +} + +// A KeyRing provides access to public and private keys. +type KeyRing interface { + + // KeysById returns the set of keys that have the given key id. + // fp can be optionally supplied, which is the full key fingerprint. + // If it's provided, then it must match. This comes up in the case + // of GPG subpacket 33. + KeysById(id uint64, fp []byte) []Key + + // KeysByIdAndUsage returns the set of keys with the given id + // that also meet the key usage given by requiredUsage. + // The requiredUsage is expressed as the bitwise-OR of + // packet.KeyFlag* values. + // fp can be optionally supplied, which is the full key fingerprint. + // If it's provided, then it must match. This comes up in the case + // of GPG subpacket 33. + KeysByIdUsage(id uint64, fp []byte, requiredUsage byte) []Key + + // DecryptionKeys returns all private keys that are valid for + // decryption. + DecryptionKeys() []Key +} + +// primaryIdentity returns the Identity marked as primary or the first identity +// if none are so marked. +func (e *Entity) primaryIdentity() *Identity { + var firstIdentity *Identity + for _, ident := range e.Identities { + if firstIdentity == nil { + firstIdentity = ident + } + if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId { + return ident + } + } + return firstIdentity +} + +// encryptionKey returns the best candidate Key for encrypting a message to the +// given Entity. +func (e *Entity) encryptionKey(now time.Time) (Key, bool) { + candidateSubkey := -1 + + // Iterate the keys to find the newest key + var maxTime time.Time + for i, subkey := range e.Subkeys { + + // NOTE(maxtaco) + // If there is a Flags subpacket, then we have to follow it, and only + // use keys that are marked for Encryption of Communication. If there + // isn't a Flags subpacket, and this is an Encrypt-Only key (right now only ElGamal + // suffices), then we implicitly use it. The check for primary below is a little + // more open-ended, but for now, let's be strict and potentially open up + // if we see bugs in the wild. + // + // One more note: old DSA/ElGamal keys tend not to have the Flags subpacket, + // so this sort of thing is pretty important for encrypting to older keys. + // + if ((subkey.Sig.FlagsValid && subkey.Sig.FlagEncryptCommunications) || + (!subkey.Sig.FlagsValid && subkey.PublicKey.PubKeyAlgo == packet.PubKeyAlgoElGamal)) && + subkey.PublicKey.PubKeyAlgo.CanEncrypt() && + !subkey.Sig.KeyExpired(now) && + subkey.Revocation == nil && + (maxTime.IsZero() || subkey.Sig.CreationTime.After(maxTime)) { + candidateSubkey = i + maxTime = subkey.Sig.CreationTime + } + } + + if candidateSubkey != -1 { + subkey := e.Subkeys[candidateSubkey] + return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig, subkey.Sig.GetKeyFlags()}, true + } + + // If we don't have any candidate subkeys for encryption and + // the primary key doesn't have any usage metadata then we + // assume that the primary key is ok. Or, if the primary key is + // marked as ok to encrypt to, then we can obviously use it. + // + // NOTE(maxtaco) - see note above, how this policy is a little too open-ended + // for my liking, but leave it for now. + i := e.primaryIdentity() + if (!i.SelfSignature.FlagsValid || i.SelfSignature.FlagEncryptCommunications) && + e.PrimaryKey.PubKeyAlgo.CanEncrypt() && + !i.SelfSignature.KeyExpired(now) { + return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature, i.SelfSignature.GetKeyFlags()}, true + } + + // This Entity appears to be signing only. + return Key{}, false +} + +// signingKey return the best candidate Key for signing a message with this +// Entity. +func (e *Entity) signingKey(now time.Time) (Key, bool) { + candidateSubkey := -1 + + for i, subkey := range e.Subkeys { + if (!subkey.Sig.FlagsValid || subkey.Sig.FlagSign) && + subkey.PrivateKey.PrivateKey != nil && + subkey.PublicKey.PubKeyAlgo.CanSign() && + subkey.Revocation == nil && + !subkey.Sig.KeyExpired(now) { + candidateSubkey = i + break + } + } + + if candidateSubkey != -1 { + subkey := e.Subkeys[candidateSubkey] + return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig, subkey.Sig.GetKeyFlags()}, true + } + + // If we have no candidate subkey then we assume that it's ok to sign + // with the primary key. + i := e.primaryIdentity() + if (!i.SelfSignature.FlagsValid || i.SelfSignature.FlagSign) && + e.PrimaryKey.PubKeyAlgo.CanSign() && + !i.SelfSignature.KeyExpired(now) && + e.PrivateKey.PrivateKey != nil { + return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature, i.SelfSignature.GetKeyFlags()}, true + } + + return Key{}, false +} + +// An EntityList contains one or more Entities. +type EntityList []*Entity + +func keyMatchesIdAndFingerprint(key *packet.PublicKey, id uint64, fp []byte) bool { + if key.KeyId != id { + return false + } + if fp == nil { + return true + } + return hmac.Equal(fp, key.Fingerprint[:]) +} + +// KeysById returns the set of keys that have the given key id. +// fp can be optionally supplied, which is the full key fingerprint. +// If it's provided, then it must match. This comes up in the case +// of GPG subpacket 33. +func (el EntityList) KeysById(id uint64, fp []byte) (keys []Key) { + for _, e := range el { + if keyMatchesIdAndFingerprint(e.PrimaryKey, id, fp) { + var selfSig *packet.Signature + for _, ident := range e.Identities { + if selfSig == nil { + selfSig = ident.SelfSignature + } else if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId { + selfSig = ident.SelfSignature + break + } + } + + var keyFlags packet.KeyFlagBits + for _, ident := range e.Identities { + keyFlags.Merge(ident.SelfSignature.GetKeyFlags()) + } + + keys = append(keys, Key{e, e.PrimaryKey, e.PrivateKey, selfSig, keyFlags}) + } + + for _, subKey := range e.Subkeys { + if keyMatchesIdAndFingerprint(subKey.PublicKey, id, fp) { + + // If there's both a a revocation and a sig, then take the + // revocation. Otherwise, we can proceed with the sig. + sig := subKey.Revocation + if sig == nil { + sig = subKey.Sig + } + + keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, sig, sig.GetKeyFlags()}) + } + } + } + return +} + +// KeysByIdAndUsage returns the set of keys with the given id that also meet +// the key usage given by requiredUsage. The requiredUsage is expressed as +// the bitwise-OR of packet.KeyFlag* values. +// fp can be optionally supplied, which is the full key fingerprint. +// If it's provided, then it must match. This comes up in the case +// of GPG subpacket 33. +func (el EntityList) KeysByIdUsage(id uint64, fp []byte, requiredUsage byte) (keys []Key) { + for _, key := range el.KeysById(id, fp) { + if len(key.Entity.Revocations) > 0 { + continue + } + + if key.SelfSignature.RevocationReason != nil { + continue + } + + if requiredUsage != 0 { + var usage byte + + switch { + case key.KeyFlags.Valid: + usage = key.KeyFlags.BitField + + case key.PublicKey.PubKeyAlgo == packet.PubKeyAlgoElGamal: + // We also need to handle the case where, although the sig's + // flags aren't valid, the key can is implicitly usable for + // encryption by virtue of being ElGamal. See also the comment + // in encryptionKey() above. + usage |= packet.KeyFlagEncryptCommunications + usage |= packet.KeyFlagEncryptStorage + + case key.PublicKey.PubKeyAlgo == packet.PubKeyAlgoDSA || + key.PublicKey.PubKeyAlgo == packet.PubKeyAlgoECDSA || + key.PublicKey.PubKeyAlgo == packet.PubKeyAlgoEdDSA: + usage |= packet.KeyFlagSign + + // For a primary RSA key without any key flags, be as permissiable + // as possible. + case key.PublicKey.PubKeyAlgo == packet.PubKeyAlgoRSA && + keyMatchesIdAndFingerprint(key.Entity.PrimaryKey, id, fp): + usage = (packet.KeyFlagCertify | packet.KeyFlagSign | + packet.KeyFlagEncryptCommunications | packet.KeyFlagEncryptStorage) + } + + if usage&requiredUsage != requiredUsage { + continue + } + } + + keys = append(keys, key) + } + return +} + +// DecryptionKeys returns all private keys that are valid for decryption. +func (el EntityList) DecryptionKeys() (keys []Key) { + for _, e := range el { + for _, subKey := range e.Subkeys { + if subKey.PrivateKey != nil && subKey.PrivateKey.PrivateKey != nil && (!subKey.Sig.FlagsValid || subKey.Sig.FlagEncryptStorage || subKey.Sig.FlagEncryptCommunications) { + keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig, subKey.Sig.GetKeyFlags()}) + } + } + } + return +} + +// ReadArmoredKeyRing reads one or more public/private keys from an armor keyring file. +func ReadArmoredKeyRing(r io.Reader) (EntityList, error) { + block, err := armor.Decode(r) + if err == io.EOF { + return nil, errors.InvalidArgumentError("no armored data found") + } + if err != nil { + return nil, err + } + if block.Type != PublicKeyType && block.Type != PrivateKeyType { + return nil, errors.InvalidArgumentError("expected public or private key block, got: " + block.Type) + } + + return ReadKeyRing(block.Body) +} + +// ReadKeyRing reads one or more public/private keys. Unsupported keys are +// ignored as long as at least a single valid key is found. +func ReadKeyRing(r io.Reader) (el EntityList, err error) { + packets := packet.NewReader(r) + var lastUnsupportedError error + + for { + var e *Entity + e, err = ReadEntity(packets) + if err != nil { + // TODO: warn about skipped unsupported/unreadable keys + if _, ok := err.(errors.UnsupportedError); ok { + lastUnsupportedError = err + err = readToNextPublicKey(packets) + } else if _, ok := err.(errors.StructuralError); ok { + // Skip unreadable, badly-formatted keys + lastUnsupportedError = err + err = readToNextPublicKey(packets) + } + if err == io.EOF { + err = nil + break + } + if err != nil { + el = nil + break + } + } else { + el = append(el, e) + } + } + + if len(el) == 0 && err == nil { + err = lastUnsupportedError + } + return +} + +// readToNextPublicKey reads packets until the start of the entity and leaves +// the first packet of the new entity in the Reader. +func readToNextPublicKey(packets *packet.Reader) (err error) { + var p packet.Packet + for { + p, err = packets.Next() + if err == io.EOF { + return + } else if err != nil { + if _, ok := err.(errors.UnsupportedError); ok { + err = nil + continue + } + return + } + + if pk, ok := p.(*packet.PublicKey); ok && !pk.IsSubkey { + packets.Unread(p) + return + } + } + + panic("unreachable") +} + +// ReadEntity reads an entity (public key, identities, subkeys etc) from the +// given Reader. +func ReadEntity(packets *packet.Reader) (*Entity, error) { + e := new(Entity) + e.Identities = make(map[string]*Identity) + + p, err := packets.Next() + if err != nil { + return nil, err + } + + var ok bool + if e.PrimaryKey, ok = p.(*packet.PublicKey); !ok { + if e.PrivateKey, ok = p.(*packet.PrivateKey); !ok { + packets.Unread(p) + return nil, errors.StructuralError("first packet was not a public/private key") + } else { + e.PrimaryKey = &e.PrivateKey.PublicKey + } + } + + if !e.PrimaryKey.PubKeyAlgo.CanSign() { + return nil, errors.StructuralError("primary key cannot be used for signatures") + } + + var current *Identity + var revocations []*packet.Signature + + designatedRevokers := make(map[uint64]bool) +EachPacket: + for { + p, err := packets.Next() + if err == io.EOF { + break + } else if err != nil { + return nil, err + } + switch pkt := p.(type) { + case *packet.UserId: + + // Make a new Identity object, that we might wind up throwing away. + // We'll only add it if we get a valid self-signature over this + // userID. + current = new(Identity) + current.Name = pkt.Id + current.UserId = pkt + case *packet.Signature: + if pkt.SigType == packet.SigTypeKeyRevocation { + // These revocations won't revoke UIDs (see + // SigTypeIdentityRevocation). Handle these first, + // because key might have revocation coming from + // another key (designated revoke). + revocations = append(revocations, pkt) + continue + } + + // These are signatures by other people on this key. Let's just ignore them + // from the beginning, since they shouldn't affect our key decoding one way + // or the other. + if pkt.IssuerKeyId != nil && *pkt.IssuerKeyId != e.PrimaryKey.KeyId { + continue + } + + // If this is a signature made by the keyholder, and the signature has stubbed out + // critical packets, then *now* we need to bail out. + if e := pkt.StubbedOutCriticalError; e != nil { + return nil, e + } + + // Next handle the case of a self-signature. According to RFC8440, + // Section 5.2.3.3, if there are several self-signatures, + // we should take the newer one. If they were both created + // at the same time, but one of them has keyflags specified and the + // other doesn't, keep the one with the keyflags. We have actually + // seen this in the wild (see the 'Yield' test in read_test.go). + // If there is a tie, and both have the same value for FlagsValid, + // then "last writer wins." + // + // HOWEVER! We have seen yet more keys in the wild (see the 'Spiros' + // test in read_test.go), in which the later self-signature is a bunch + // of junk, and doesn't even specify key flags. Does it really make + // sense to overwrite reasonable key flags with the empty set? I'm not + // sure what that would be trying to achieve, and plus GPG seems to be + // ok with this situation, and ignores the later (empty) keyflag set. + // So further tighten our overwrite rules, and only allow the later + // signature to overwrite the earlier signature if so doing won't + // trash the key flags. + if current != nil && + (current.SelfSignature == nil || + (!pkt.CreationTime.Before(current.SelfSignature.CreationTime) && + (pkt.FlagsValid || !current.SelfSignature.FlagsValid))) && + (pkt.SigType == packet.SigTypePositiveCert || pkt.SigType == packet.SigTypeGenericCert) && + pkt.IssuerKeyId != nil && + *pkt.IssuerKeyId == e.PrimaryKey.KeyId { + + if err = e.PrimaryKey.VerifyUserIdSignature(current.Name, e.PrimaryKey, pkt); err == nil { + + current.SelfSignature = pkt + + // NOTE(maxtaco) 2016.01.11 + // Only register an identity once we've gotten a valid self-signature. + // It's possible therefore for us to throw away `current` in the case + // no valid self-signatures were found. That's OK as long as there are + // other identies that make sense. + // + // NOTE! We might later see a revocation for this very same UID, and it + // won't be undone. We've preserved this feature from the original + // Google OpenPGP we forked from. + e.Identities[current.Name] = current + } else { + // We really should warn that there was a failure here. Not raise an error + // since this really shouldn't be a fail-stop error. + } + } else if current != nil && pkt.SigType == packet.SigTypeIdentityRevocation { + if err = e.PrimaryKey.VerifyUserIdSignature(current.Name, e.PrimaryKey, pkt); err == nil { + // Note: we are not removing the identity from + // e.Identities. Caller can always filter by Revocation + // field to ignore revoked identities. + current.Revocation = pkt + } + } else if pkt.SigType == packet.SigTypeDirectSignature { + if err = e.PrimaryKey.VerifyRevocationSignature(e.PrimaryKey, pkt); err == nil { + if desig := pkt.DesignatedRevoker; desig != nil { + // If it's a designated revoker signature, take last 8 octects + // of fingerprint as Key ID and save it to designatedRevokers + // map. We consult this map later to see if a foreign + // revocation should be added to UnverifiedRevocations. + keyID := binary.BigEndian.Uint64(desig.Fingerprint[len(desig.Fingerprint)-8:]) + designatedRevokers[keyID] = true + } + } + } else if current == nil { + // NOTE(maxtaco) + // + // See https://github.com/keybase/client/issues/2666 + // + // There might have been a user attribute picture before this signature, + // in which case this is still a valid PGP key. In the future we might + // not ignore user attributes (like picture). But either way, it doesn't + // make sense to bail out here. Keep looking for other valid signatures. + // + // Used to be: + // return nil, errors.StructuralError("signature packet found before user id packet") + } else { + current.Signatures = append(current.Signatures, pkt) + } + case *packet.PrivateKey: + if pkt.IsSubkey == false { + packets.Unread(p) + break EachPacket + } + err = addSubkey(e, packets, &pkt.PublicKey, pkt) + if err != nil { + return nil, err + } + case *packet.PublicKey: + if pkt.IsSubkey == false { + packets.Unread(p) + break EachPacket + } + err = addSubkey(e, packets, pkt, nil) + if err != nil { + return nil, err + } + default: + // we ignore unknown packets + } + } + + if len(e.Identities) == 0 { + return nil, errors.StructuralError("entity without any identities") + } + + for _, revocation := range revocations { + if revocation.IssuerKeyId == nil || *revocation.IssuerKeyId == e.PrimaryKey.KeyId { + // Key revokes itself, something that we can verify. + err = e.PrimaryKey.VerifyRevocationSignature(e.PrimaryKey, revocation) + if err == nil { + e.Revocations = append(e.Revocations, revocation) + } else { + return nil, errors.StructuralError("revocation signature signed by alternate key") + } + } else if revocation.IssuerKeyId != nil { + if _, ok := designatedRevokers[*revocation.IssuerKeyId]; ok { + // Revocation is done by certified designated revoker, + // but we can't verify the revocation. + e.UnverifiedRevocations = append(e.UnverifiedRevocations, revocation) + } + } + } + + return e, nil +} + +func addSubkey(e *Entity, packets *packet.Reader, pub *packet.PublicKey, priv *packet.PrivateKey) error { + var subKey Subkey + subKey.PublicKey = pub + subKey.PrivateKey = priv + var lastErr error + for { + p, err := packets.Next() + if err == io.EOF { + break + } + if err != nil { + return errors.StructuralError("subkey signature invalid: " + err.Error()) + } + sig, ok := p.(*packet.Signature) + if !ok { + // Hit a non-signature packet, so assume we're up to the next key + packets.Unread(p) + break + } + if st := sig.SigType; st != packet.SigTypeSubkeyBinding && st != packet.SigTypeSubkeyRevocation { + + // Note(maxtaco): + // We used to error out here, but instead, let's fast-forward past + // packets that are in the wrong place (like misplaced 0x13 signatures) + // until we get to one that works. For a test case, + // see TestWithBadSubkeySignaturePackets. + + continue + } + err = e.PrimaryKey.VerifyKeySignature(subKey.PublicKey, sig) + if err != nil { + // Non valid signature, so again, no need to abandon all hope, just continue; + // make a note of the error we hit. + lastErr = errors.StructuralError("subkey signature invalid: " + err.Error()) + continue + } + switch sig.SigType { + case packet.SigTypeSubkeyBinding: + // Does the "new" sig set expiration to later date than + // "previous" sig? + if subKey.Sig == nil || subKey.Sig.ExpiresBeforeOther(sig) { + subKey.Sig = sig + } + case packet.SigTypeSubkeyRevocation: + // First writer wins + if subKey.Revocation == nil { + subKey.Revocation = sig + } + } + } + if subKey.Sig != nil { + e.Subkeys = append(e.Subkeys, subKey) + } else { + if lastErr == nil { + lastErr = errors.StructuralError("Subkey wasn't signed; expected a 'binding' signature") + } + e.BadSubkeys = append(e.BadSubkeys, BadSubkey{Subkey: subKey, Err: lastErr}) + } + return nil +} + +const defaultRSAKeyBits = 2048 + +// NewEntity returns an Entity that contains a fresh RSA/RSA keypair with a +// single identity composed of the given full name, comment and email, any of +// which may be empty but must not contain any of "()<>\x00". +// If config is nil, sensible defaults will be used. +func NewEntity(name, comment, email string, config *packet.Config) (*Entity, error) { + currentTime := config.Now() + + bits := defaultRSAKeyBits + if config != nil && config.RSABits != 0 { + bits = config.RSABits + } + + uid := packet.NewUserId(name, comment, email) + if uid == nil { + return nil, errors.InvalidArgumentError("user id field contained invalid characters") + } + signingPriv, err := rsa.GenerateKey(config.Random(), bits) + if err != nil { + return nil, err + } + encryptingPriv, err := rsa.GenerateKey(config.Random(), bits) + if err != nil { + return nil, err + } + + e := &Entity{ + PrimaryKey: packet.NewRSAPublicKey(currentTime, &signingPriv.PublicKey), + PrivateKey: packet.NewRSAPrivateKey(currentTime, signingPriv), + Identities: make(map[string]*Identity), + } + isPrimaryId := true + e.Identities[uid.Id] = &Identity{ + Name: uid.Name, + UserId: uid, + SelfSignature: &packet.Signature{ + CreationTime: currentTime, + SigType: packet.SigTypePositiveCert, + PubKeyAlgo: packet.PubKeyAlgoRSA, + Hash: config.Hash(), + IsPrimaryId: &isPrimaryId, + FlagsValid: true, + FlagSign: true, + FlagCertify: true, + IssuerKeyId: &e.PrimaryKey.KeyId, + }, + } + + e.Subkeys = make([]Subkey, 1) + e.Subkeys[0] = Subkey{ + PublicKey: packet.NewRSAPublicKey(currentTime, &encryptingPriv.PublicKey), + PrivateKey: packet.NewRSAPrivateKey(currentTime, encryptingPriv), + Sig: &packet.Signature{ + CreationTime: currentTime, + SigType: packet.SigTypeSubkeyBinding, + PubKeyAlgo: packet.PubKeyAlgoRSA, + Hash: config.Hash(), + FlagsValid: true, + FlagEncryptStorage: true, + FlagEncryptCommunications: true, + IssuerKeyId: &e.PrimaryKey.KeyId, + }, + } + e.Subkeys[0].PublicKey.IsSubkey = true + e.Subkeys[0].PrivateKey.IsSubkey = true + + return e, nil +} + +// SerializePrivate serializes an Entity, including private key material, to +// the given Writer. For now, it must only be used on an Entity returned from +// NewEntity. +// If config is nil, sensible defaults will be used. +func (e *Entity) SerializePrivate(w io.Writer, config *packet.Config) (err error) { + err = e.PrivateKey.Serialize(w) + if err != nil { + return + } + for _, ident := range e.Identities { + err = ident.UserId.Serialize(w) + if err != nil { + return + } + if e.PrivateKey.PrivateKey != nil { + err = ident.SelfSignature.SignUserId(ident.UserId.Id, e.PrimaryKey, e.PrivateKey, config) + if err != nil { + return + } + } + err = ident.SelfSignature.Serialize(w) + if err != nil { + return + } + } + for _, subkey := range e.Subkeys { + err = subkey.PrivateKey.Serialize(w) + if err != nil { + return + } + // Workaround shortcoming of SignKey(), which doesn't work to reverse-sign + // sub-signing keys. So if requested, just reuse the signatures already + // available to us (if we read this key from a keyring). + if e.PrivateKey.PrivateKey != nil && !config.ReuseSignatures() { + err = subkey.Sig.SignKey(subkey.PublicKey, e.PrivateKey, config) + if err != nil { + return + } + } + + if subkey.Revocation != nil { + err = subkey.Revocation.Serialize(w) + if err != nil { + return + } + } + + err = subkey.Sig.Serialize(w) + if err != nil { + return + } + } + return nil +} + +// Serialize writes the public part of the given Entity to w. (No private +// key material will be output). +func (e *Entity) Serialize(w io.Writer) error { + err := e.PrimaryKey.Serialize(w) + if err != nil { + return err + } + for _, ident := range e.Identities { + err = ident.UserId.Serialize(w) + if err != nil { + return err + } + err = ident.SelfSignature.Serialize(w) + if err != nil { + return err + } + for _, sig := range ident.Signatures { + err = sig.Serialize(w) + if err != nil { + return err + } + } + } + for _, subkey := range e.Subkeys { + err = subkey.PublicKey.Serialize(w) + if err != nil { + return err + } + + if subkey.Revocation != nil { + err = subkey.Revocation.Serialize(w) + if err != nil { + return err + } + } + err = subkey.Sig.Serialize(w) + if err != nil { + return err + } + } + return nil +} + +// SignIdentity adds a signature to e, from signer, attesting that identity is +// associated with e. The provided identity must already be an element of +// e.Identities and the private key of signer must have been decrypted if +// necessary. +// If config is nil, sensible defaults will be used. +func (e *Entity) SignIdentity(identity string, signer *Entity, config *packet.Config) error { + if signer.PrivateKey == nil { + return errors.InvalidArgumentError("signing Entity must have a private key") + } + if signer.PrivateKey.Encrypted { + return errors.InvalidArgumentError("signing Entity's private key must be decrypted") + } + ident, ok := e.Identities[identity] + if !ok { + return errors.InvalidArgumentError("given identity string not found in Entity") + } + + sig := &packet.Signature{ + SigType: packet.SigTypeGenericCert, + PubKeyAlgo: signer.PrivateKey.PubKeyAlgo, + Hash: config.Hash(), + CreationTime: config.Now(), + IssuerKeyId: &signer.PrivateKey.KeyId, + } + if err := sig.SignUserId(identity, e.PrimaryKey, signer.PrivateKey, config); err != nil { + return err + } + ident.Signatures = append(ident.Signatures, sig) + return nil +} + +// CopySubkeyRevocations copies subkey revocations from the src Entity over +// to the receiver entity. We need this because `gpg --export-secret-key` does +// not appear to output subkey revocations. In this case we need to manually +// merge with the output of `gpg --export`. +func (e *Entity) CopySubkeyRevocations(src *Entity) { + m := make(map[[20]byte]*packet.Signature) + for _, subkey := range src.Subkeys { + if subkey.Revocation != nil { + m[subkey.PublicKey.Fingerprint] = subkey.Revocation + } + } + for i, subkey := range e.Subkeys { + if r := m[subkey.PublicKey.Fingerprint]; r != nil { + e.Subkeys[i].Revocation = r + } + } +} + +// CheckDesignatedRevokers will try to confirm any of designated +// revocation of entity. For this function to work, revocation +// issuer's key should be found in keyring. First successfully +// verified designated revocation is returned along with the key that +// verified it. +func FindVerifiedDesignatedRevoke(keyring KeyRing, entity *Entity) (*packet.Signature, *Key) { + for _, sig := range entity.UnverifiedRevocations { + if sig.IssuerKeyId == nil { + continue + } + + issuerKeyId := *sig.IssuerKeyId + issuerFingerprint := sig.IssuerFingerprint + keys := keyring.KeysByIdUsage(issuerKeyId, issuerFingerprint, packet.KeyFlagSign) + if len(keys) == 0 { + continue + } + for _, key := range keys { + err := key.PublicKey.VerifyRevocationSignature(entity.PrimaryKey, sig) + if err == nil { + return sig, &key + } + } + } + + return nil, nil +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/compressed.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/compressed.go similarity index 98% rename from vendor/golang.org/x/crypto/openpgp/packet/compressed.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/compressed.go index e8f0b5caa..f023fe533 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/compressed.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/compressed.go @@ -8,9 +8,10 @@ import ( "compress/bzip2" "compress/flate" "compress/zlib" - "golang.org/x/crypto/openpgp/errors" "io" "strconv" + + "github.com/keybase/go-crypto/openpgp/errors" ) // Compressed represents a compressed OpenPGP packet. The decompressed contents diff --git a/vendor/golang.org/x/crypto/openpgp/packet/config.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/config.go similarity index 92% rename from vendor/golang.org/x/crypto/openpgp/packet/config.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/config.go index c76eecc96..f4125e189 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/config.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/config.go @@ -46,6 +46,9 @@ type Config struct { // RSABits is the number of bits in new RSA keys made with NewEntity. // If zero, then 2048 bit keys are created. RSABits int + // ReuseSignatures tells us to reuse existing Signatures + // on serialized output. + ReuseSignaturesOnSerialize bool } func (c *Config) Random() io.Reader { @@ -89,3 +92,7 @@ func (c *Config) PasswordHashIterations() int { } return c.S2KCount } + +func (c *Config) ReuseSignatures() bool { + return c != nil && c.ReuseSignaturesOnSerialize +} diff --git a/vendor/github.com/keybase/go-crypto/openpgp/packet/ecdh.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/ecdh.go new file mode 100644 index 000000000..41de661d7 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/ecdh.go @@ -0,0 +1,104 @@ +package packet + +import ( + "bytes" + "io" + "math/big" + + "github.com/keybase/go-crypto/openpgp/ecdh" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/s2k" +) + +// ECDHKdfParams generates KDF parameters sequence for given +// PublicKey. See https://tools.ietf.org/html/rfc6637#section-8 +func ECDHKdfParams(pub *PublicKey) []byte { + buf := new(bytes.Buffer) + oid := pub.ec.oid + buf.WriteByte(byte(len(oid))) + buf.Write(oid) + buf.WriteByte(18) // ECDH TYPE + pub.ecdh.serialize(buf) + buf.WriteString("Anonymous Sender ") + buf.Write(pub.Fingerprint[:]) + return buf.Bytes() +} + +func decryptKeyECDH(priv *PrivateKey, X, Y *big.Int, C []byte) (out []byte, err error) { + ecdhpriv, ok := priv.PrivateKey.(*ecdh.PrivateKey) + if !ok { + return nil, errors.InvalidArgumentError("bad internal ECDH key") + } + + Sx := ecdhpriv.DecryptShared(X, Y) + + kdfParams := ECDHKdfParams(&priv.PublicKey) + hash, ok := s2k.HashIdToHash(byte(priv.ecdh.KdfHash)) + if !ok { + return nil, errors.InvalidArgumentError("invalid hash id in private key") + } + + key := ecdhpriv.KDF(Sx, kdfParams, hash) + keySize := CipherFunction(priv.ecdh.KdfAlgo).KeySize() + + decrypted, err := ecdh.AESKeyUnwrap(key[:keySize], C) + if err != nil { + return nil, err + } + + // We have to "read ahead" to discover real length of the + // encryption key and properly unpad buffer. + cipherFunc := CipherFunction(decrypted[0]) + // +3 bytes = 1-byte cipher id and checksum 2-byte checksum. + out = ecdh.UnpadBuffer(decrypted, cipherFunc.KeySize()+3) + if out == nil { + return nil, errors.InvalidArgumentError("invalid padding while ECDH") + } + return out, nil +} + +func serializeEncryptedKeyECDH(w io.Writer, rand io.Reader, header [10]byte, pub *PublicKey, keyBlock []byte) error { + ecdhpub := pub.PublicKey.(*ecdh.PublicKey) + kdfParams := ECDHKdfParams(pub) + + hash, ok := s2k.HashIdToHash(byte(pub.ecdh.KdfHash)) + if !ok { + return errors.InvalidArgumentError("invalid hash id in private key") + } + + kdfKeySize := CipherFunction(pub.ecdh.KdfAlgo).KeySize() + Vx, Vy, C, err := ecdhpub.Encrypt(rand, kdfParams, keyBlock, hash, kdfKeySize) + if err != nil { + return err + } + + mpis, mpiBitLen := ecdh.Marshal(ecdhpub.Curve, Vx, Vy) + + packetLen := len(header) /* header length in bytes */ + packetLen += 2 /* mpi length in bits */ + len(mpis) + packetLen += 1 /* ciphertext size in bytes */ + len(C) + + err = serializeHeader(w, packetTypeEncryptedKey, packetLen) + if err != nil { + return err + } + + _, err = w.Write(header[:]) + if err != nil { + return err + } + + _, err = w.Write([]byte{byte(mpiBitLen >> 8), byte(mpiBitLen)}) + if err != nil { + return err + } + + _, err = w.Write(mpis[:]) + if err != nil { + return err + } + + w.Write([]byte{byte(len(C))}) + w.Write(C[:]) + return nil +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/encrypted_key.go similarity index 86% rename from vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/encrypted_key.go index 266840d05..58692ec8b 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/encrypted_key.go @@ -5,14 +5,15 @@ package packet import ( - "crypto/rsa" "encoding/binary" "io" "math/big" "strconv" - "golang.org/x/crypto/openpgp/elgamal" - "golang.org/x/crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/ecdh" + "github.com/keybase/go-crypto/openpgp/elgamal" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/rsa" ) const encryptedKeyVersion = 3 @@ -26,6 +27,7 @@ type EncryptedKey struct { Key []byte // only valid after a successful Decrypt encryptedMPI1, encryptedMPI2 parsedMPI + ecdh_C []byte } func (e *EncryptedKey) parse(r io.Reader) (err error) { @@ -48,9 +50,25 @@ func (e *EncryptedKey) parse(r io.Reader) (err error) { return } e.encryptedMPI2.bytes, e.encryptedMPI2.bitLength, err = readMPI(r) + case PubKeyAlgoECDH: + e.encryptedMPI1.bytes, e.encryptedMPI1.bitLength, err = readMPI(r) + if err != nil { + return err + } + _, err = readFull(r, buf[:1]) // read C len (1 byte) + if err != nil { + return err + } + e.ecdh_C = make([]byte, int(buf[0])) + _, err = readFull(r, e.ecdh_C) } + + if err != nil { + return err + } + _, err = consumeAll(r) - return + return err } func checksumKeyMaterial(key []byte) uint16 { @@ -77,6 +95,13 @@ func (e *EncryptedKey) Decrypt(priv *PrivateKey, config *Config) error { c1 := new(big.Int).SetBytes(e.encryptedMPI1.bytes) c2 := new(big.Int).SetBytes(e.encryptedMPI2.bytes) b, err = elgamal.Decrypt(priv.PrivateKey.(*elgamal.PrivateKey), c1, c2) + case PubKeyAlgoECDH: + // Note: Unmarshal checks if point is on the curve. + c1, c2 := ecdh.Unmarshal(priv.PrivateKey.(*ecdh.PrivateKey).Curve, e.encryptedMPI1.bytes) + if c1 == nil { + return errors.InvalidArgumentError("failed to parse EC point for encryption key") + } + b, err = decryptKeyECDH(priv, c1, c2, e.ecdh_C) default: err = errors.InvalidArgumentError("cannot decrypted encrypted session key with private key of type " + strconv.Itoa(int(priv.PubKeyAlgo))) } @@ -147,6 +172,8 @@ func SerializeEncryptedKey(w io.Writer, pub *PublicKey, cipherFunc CipherFunctio return serializeEncryptedKeyRSA(w, config.Random(), buf, pub.PublicKey.(*rsa.PublicKey), keyBlock) case PubKeyAlgoElGamal: return serializeEncryptedKeyElGamal(w, config.Random(), buf, pub.PublicKey.(*elgamal.PublicKey), keyBlock) + case PubKeyAlgoECDH: + return serializeEncryptedKeyECDH(w, config.Random(), buf, pub, keyBlock) case PubKeyAlgoDSA, PubKeyAlgoRSASignOnly: return errors.InvalidArgumentError("cannot encrypt to public key of type " + strconv.Itoa(int(pub.PubKeyAlgo))) } diff --git a/vendor/golang.org/x/crypto/openpgp/packet/literal.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/literal.go similarity index 100% rename from vendor/golang.org/x/crypto/openpgp/packet/literal.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/literal.go diff --git a/vendor/golang.org/x/crypto/openpgp/packet/ocfb.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/ocfb.go similarity index 100% rename from vendor/golang.org/x/crypto/openpgp/packet/ocfb.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/ocfb.go diff --git a/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/one_pass_signature.go similarity index 94% rename from vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/one_pass_signature.go index 171350339..af404bb10 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/one_pass_signature.go @@ -7,10 +7,11 @@ package packet import ( "crypto" "encoding/binary" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/s2k" "io" "strconv" + + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/s2k" ) // OnePassSignature represents a one-pass signature packet. See RFC 4880, diff --git a/vendor/golang.org/x/crypto/openpgp/packet/opaque.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/opaque.go similarity index 98% rename from vendor/golang.org/x/crypto/openpgp/packet/opaque.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/opaque.go index 456d807f2..cdeea012f 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/opaque.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/opaque.go @@ -9,7 +9,7 @@ import ( "io" "io/ioutil" - "golang.org/x/crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/errors" ) // OpaquePacket represents an OpenPGP packet as raw, unparsed data. This is diff --git a/vendor/golang.org/x/crypto/openpgp/packet/packet.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/packet.go similarity index 90% rename from vendor/golang.org/x/crypto/openpgp/packet/packet.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/packet.go index 3eded93f0..48854436f 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/packet.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/packet.go @@ -4,17 +4,19 @@ // Package packet implements parsing and serialization of OpenPGP packets, as // specified in RFC 4880. -package packet // import "golang.org/x/crypto/openpgp/packet" +package packet // import "github.com/keybase/go-crypto/openpgp/packet" import ( "bufio" "crypto/aes" "crypto/cipher" "crypto/des" - "golang.org/x/crypto/cast5" - "golang.org/x/crypto/openpgp/errors" + "crypto/elliptic" "io" "math/big" + + "github.com/keybase/go-crypto/cast5" + "github.com/keybase/go-crypto/openpgp/errors" ) // readFull is the same as io.ReadFull except that reading zero bytes returns @@ -273,6 +275,8 @@ func consumeAll(r io.Reader) (n int64, err error) { return } } + + panic("unreachable") } // packetType represents the numeric ids of the different OpenPGP packet types. See @@ -383,17 +387,18 @@ func Read(r io.Reader) (p Packet, err error) { type SignatureType uint8 const ( - SigTypeBinary SignatureType = 0 - SigTypeText = 1 - SigTypeGenericCert = 0x10 - SigTypePersonaCert = 0x11 - SigTypeCasualCert = 0x12 - SigTypePositiveCert = 0x13 - SigTypeSubkeyBinding = 0x18 - SigTypePrimaryKeyBinding = 0x19 - SigTypeDirectSignature = 0x1F - SigTypeKeyRevocation = 0x20 - SigTypeSubkeyRevocation = 0x28 + SigTypeBinary SignatureType = 0 + SigTypeText = 1 + SigTypeGenericCert = 0x10 + SigTypePersonaCert = 0x11 + SigTypeCasualCert = 0x12 + SigTypePositiveCert = 0x13 + SigTypeSubkeyBinding = 0x18 + SigTypePrimaryKeyBinding = 0x19 + SigTypeDirectSignature = 0x1F + SigTypeKeyRevocation = 0x20 + SigTypeSubkeyRevocation = 0x28 + SigTypeIdentityRevocation = 0x30 ) // PublicKeyAlgorithm represents the different public key system specified for @@ -410,13 +415,15 @@ const ( // RFC 6637, Section 5. PubKeyAlgoECDH PublicKeyAlgorithm = 18 PubKeyAlgoECDSA PublicKeyAlgorithm = 19 + // RFC -1 + PubKeyAlgoEdDSA PublicKeyAlgorithm = 22 ) // CanEncrypt returns true if it's possible to encrypt a message to a public // key of the given type. func (pka PublicKeyAlgorithm) CanEncrypt() bool { switch pka { - case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoElGamal: + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoElGamal, PubKeyAlgoECDH: return true } return false @@ -426,7 +433,7 @@ func (pka PublicKeyAlgorithm) CanEncrypt() bool { // sign a message. func (pka PublicKeyAlgorithm) CanSign() bool { switch pka { - case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA: + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA, PubKeyAlgoEdDSA: return true } return false @@ -520,6 +527,25 @@ func writeMPI(w io.Writer, bitLength uint16, mpiBytes []byte) (err error) { return } +func WritePaddedBigInt(w io.Writer, length int, X *big.Int) (n int, err error) { + bytes := X.Bytes() + n1, err := w.Write(make([]byte, length-len(bytes))) + if err != nil { + return n1, err + } + n2, err := w.Write(bytes) + if err != nil { + return n2, err + } + return (n1 + n2), err +} + +// Minimum number of bytes to fit the curve coordinates. All +// coordinates have to be 0-padded to this length. +func mpiPointByteLength(curve elliptic.Curve) int { + return (curve.Params().P.BitLen() + 7) / 8 +} + // writeBig serializes a *big.Int to w. func writeBig(w io.Writer, i *big.Int) error { return writeMPI(w, uint16(i.BitLen()), i.Bytes()) diff --git a/vendor/golang.org/x/crypto/openpgp/packet/private_key.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/private_key.go similarity index 53% rename from vendor/golang.org/x/crypto/openpgp/packet/private_key.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/private_key.go index 34734cc63..27974e782 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/private_key.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/private_key.go @@ -6,21 +6,23 @@ package packet import ( "bytes" - "crypto" "crypto/cipher" "crypto/dsa" "crypto/ecdsa" - "crypto/rsa" "crypto/sha1" + "fmt" "io" "io/ioutil" "math/big" "strconv" "time" - "golang.org/x/crypto/openpgp/elgamal" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/s2k" + "github.com/keybase/go-crypto/ed25519" + "github.com/keybase/go-crypto/openpgp/ecdh" + "github.com/keybase/go-crypto/openpgp/elgamal" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/s2k" + "github.com/keybase/go-crypto/rsa" ) // PrivateKey represents a possibly encrypted private key. See RFC 4880, @@ -31,9 +33,32 @@ type PrivateKey struct { encryptedData []byte cipher CipherFunction s2k func(out, in []byte) - PrivateKey interface{} // An *{rsa|dsa|ecdsa}.PrivateKey or a crypto.Signer. + PrivateKey interface{} // An *rsa.PrivateKey or *dsa.PrivateKey. sha1Checksum bool iv []byte + s2kHeader []byte +} + +type EdDSAPrivateKey struct { + PrivateKey + seed parsedMPI +} + +func (e *EdDSAPrivateKey) Sign(digest []byte) (R, S []byte, err error) { + r := bytes.NewReader(e.seed.bytes) + publicKey, privateKey, err := ed25519.GenerateKey(r) + if err != nil { + return nil, nil, err + } + + if !bytes.Equal(publicKey, e.PublicKey.edk.p.bytes[1:]) { // [1:] because [0] is 0x40 mpi header + return nil, nil, errors.UnsupportedError("EdDSA: Private key does not match public key.") + } + + sig := ed25519.Sign(privateKey, digest) + + sigLen := ed25519.SignatureSize / 2 + return sig[:sigLen], sig[sigLen:], nil } func NewRSAPrivateKey(currentTime time.Time, priv *rsa.PrivateKey) *PrivateKey { @@ -64,23 +89,6 @@ func NewECDSAPrivateKey(currentTime time.Time, priv *ecdsa.PrivateKey) *PrivateK return pk } -// NewSignerPrivateKey creates a sign-only PrivateKey from a crypto.Signer that -// implements RSA or ECDSA. -func NewSignerPrivateKey(currentTime time.Time, signer crypto.Signer) *PrivateKey { - pk := new(PrivateKey) - switch pubkey := signer.Public().(type) { - case rsa.PublicKey: - pk.PublicKey = *NewRSAPublicKey(currentTime, &pubkey) - pk.PubKeyAlgo = PubKeyAlgoRSASignOnly - case ecdsa.PublicKey: - pk.PublicKey = *NewECDSAPublicKey(currentTime, &pubkey) - default: - panic("openpgp: unknown crypto.Signer type in NewSignerPrivateKey") - } - pk.PrivateKey = signer - return pk -} - func (pk *PrivateKey) parse(r io.Reader) (err error) { err = (&pk.PublicKey).parse(r) if err != nil { @@ -112,10 +120,16 @@ func (pk *PrivateKey) parse(r io.Reader) (err error) { if s2kType == 254 { pk.sha1Checksum = true } + // S2K == nil implies that we got a "GNU Dummy" S2K. For instance, + // because our master secret key is on a USB key in a vault somewhere. + // In that case, there is no further data to consume here. + if pk.s2k == nil { + pk.Encrypted = false + return + } default: return errors.UnsupportedError("deprecated s2k function in private key") } - if pk.Encrypted { blockSize := pk.cipher.blockSize() if blockSize == 0 { @@ -148,31 +162,105 @@ func mod64kHash(d []byte) uint16 { return h } +// Encrypt is the counterpart to the Decrypt() method below. It encrypts +// the private key with the provided passphrase. If config is nil, then +// the standard, and sensible, defaults apply. +// +// A key will be derived from the given passphrase using S2K Specifier +// Type 3 (Iterated + Salted, see RFC-4880 Sec. 3.7.1.3). This choice +// is hardcoded in s2k.Serialize(). S2KCount is hardcoded to 0, which is +// equivalent to 65536. And the hash algorithm for key-derivation can be +// set with config. The encrypted PrivateKey, using the algorithm specified +// in config (if provided), is written out to the encryptedData member. +// When Serialize() is called, this encryptedData member will be +// serialized, using S2K Usage value of 254, and thus SHA1 checksum. +func (pk *PrivateKey) Encrypt(passphrase []byte, config *Config) (err error) { + if pk.PrivateKey == nil { + return errors.InvalidArgumentError("there is no private key to encrypt") + } + + pk.sha1Checksum = true + pk.cipher = config.Cipher() + s2kConfig := s2k.Config{ + Hash: config.Hash(), + S2KCount: 0, + } + s2kBuf := bytes.NewBuffer(nil) + derivedKey := make([]byte, pk.cipher.KeySize()) + err = s2k.Serialize(s2kBuf, derivedKey, config.Random(), passphrase, &s2kConfig) + if err != nil { + return err + } + + pk.s2kHeader = s2kBuf.Bytes() + // No good way to set pk.s2k but to call s2k.Parse(), + // even though we have all the information here, but + // most of the functions needed are private to s2k. + pk.s2k, err = s2k.Parse(s2kBuf) + pk.iv = make([]byte, pk.cipher.blockSize()) + if _, err = config.Random().Read(pk.iv); err != nil { + return err + } + + privateKeyBuf := bytes.NewBuffer(nil) + if err = pk.serializePrivateKey(privateKeyBuf); err != nil { + return err + } + + checksum := sha1.Sum(privateKeyBuf.Bytes()) + if _, err = privateKeyBuf.Write(checksum[:]); err != nil { + return err + } + + pkData := privateKeyBuf.Bytes() + block := pk.cipher.new(derivedKey) + pk.encryptedData = make([]byte, len(pkData)) + cfb := cipher.NewCFBEncrypter(block, pk.iv) + cfb.XORKeyStream(pk.encryptedData, pkData) + pk.Encrypted = true + return nil +} + func (pk *PrivateKey) Serialize(w io.Writer) (err error) { - // TODO(agl): support encrypted private keys buf := bytes.NewBuffer(nil) err = pk.PublicKey.serializeWithoutHeaders(buf) if err != nil { return } - buf.WriteByte(0 /* no encryption */) privateKeyBuf := bytes.NewBuffer(nil) - switch priv := pk.PrivateKey.(type) { - case *rsa.PrivateKey: - err = serializeRSAPrivateKey(privateKeyBuf, priv) - case *dsa.PrivateKey: - err = serializeDSAPrivateKey(privateKeyBuf, priv) - case *elgamal.PrivateKey: - err = serializeElGamalPrivateKey(privateKeyBuf, priv) - case *ecdsa.PrivateKey: - err = serializeECDSAPrivateKey(privateKeyBuf, priv) - default: - err = errors.InvalidArgumentError("unknown private key type") - } - if err != nil { - return + if pk.PrivateKey == nil { + _, err = buf.Write([]byte{ + 254, // SHA-1 Convention + 9, // Encryption scheme (AES256) + 101, // GNU Extensions + 2, // Hash value (SHA1) + 'G', 'N', 'U', // "GNU" as a string + 1, // Extension type 1001 (minus 1000) + }) + } else if pk.Encrypted { + _, err = buf.Write([]byte{ + 254, // SHA-1 Convention + byte(pk.cipher), // Encryption scheme + }) + if err != nil { + return err + } + if _, err = buf.Write(pk.s2kHeader); err != nil { + return err + } + if _, err = buf.Write(pk.iv); err != nil { + return err + } + if _, err = privateKeyBuf.Write(pk.encryptedData); err != nil { + return err + } + } else { + buf.WriteByte(0 /* no encryption */) + if err = pk.serializePrivateKey(privateKeyBuf); err != nil { + return err + } } ptype := packetTypePrivateKey @@ -181,7 +269,11 @@ func (pk *PrivateKey) Serialize(w io.Writer) (err error) { if pk.IsSubkey { ptype = packetTypePrivateSubkey } - err = serializeHeader(w, ptype, len(contents)+len(privateKeyBytes)+2) + totalLen := len(contents) + len(privateKeyBytes) + if !pk.Encrypted { + totalLen += 2 + } + err = serializeHeader(w, ptype, totalLen) if err != nil { return } @@ -194,15 +286,38 @@ func (pk *PrivateKey) Serialize(w io.Writer) (err error) { return } - checksum := mod64kHash(privateKeyBytes) - var checksumBytes [2]byte - checksumBytes[0] = byte(checksum >> 8) - checksumBytes[1] = byte(checksum) - _, err = w.Write(checksumBytes[:]) + if len(privateKeyBytes) > 0 && !pk.Encrypted { + checksum := mod64kHash(privateKeyBytes) + var checksumBytes [2]byte + checksumBytes[0] = byte(checksum >> 8) + checksumBytes[1] = byte(checksum) + _, err = w.Write(checksumBytes[:]) + } return } +func (pk *PrivateKey) serializePrivateKey(w io.Writer) (err error) { + switch priv := pk.PrivateKey.(type) { + case *rsa.PrivateKey: + err = serializeRSAPrivateKey(w, priv) + case *dsa.PrivateKey: + err = serializeDSAPrivateKey(w, priv) + case *elgamal.PrivateKey: + err = serializeElGamalPrivateKey(w, priv) + case *ecdsa.PrivateKey: + err = serializeECDSAPrivateKey(w, priv) + case *ecdh.PrivateKey: + err = serializeECDHPrivateKey(w, priv) + case *EdDSAPrivateKey: + err = serializeEdDSAPrivateKey(w, priv) + default: + err = errors.InvalidArgumentError("unknown private key type") + } + + return err +} + func serializeRSAPrivateKey(w io.Writer, priv *rsa.PrivateKey) error { err := writeBig(w, priv.D) if err != nil { @@ -231,11 +346,23 @@ func serializeECDSAPrivateKey(w io.Writer, priv *ecdsa.PrivateKey) error { return writeBig(w, priv.D) } +func serializeECDHPrivateKey(w io.Writer, priv *ecdh.PrivateKey) error { + return writeBig(w, priv.X) +} + +func serializeEdDSAPrivateKey(w io.Writer, priv *EdDSAPrivateKey) error { + return writeMPI(w, priv.seed.bitLength, priv.seed.bytes) +} + // Decrypt decrypts an encrypted private key using a passphrase. func (pk *PrivateKey) Decrypt(passphrase []byte) error { if !pk.Encrypted { return nil } + // For GNU Dummy S2K, there's no key here, so don't do anything. + if pk.s2k == nil { + return nil + } key := make([]byte, pk.cipher.KeySize()) pk.s2k(key, passphrase) @@ -284,6 +411,10 @@ func (pk *PrivateKey) parsePrivateKey(data []byte) (err error) { return pk.parseElGamalPrivateKey(data) case PubKeyAlgoECDSA: return pk.parseECDSAPrivateKey(data) + case PubKeyAlgoECDH: + return pk.parseECDHPrivateKey(data) + case PubKeyAlgoEdDSA: + return pk.parseEdDSAPrivateKey(data) } panic("impossible") } @@ -360,8 +491,10 @@ func (pk *PrivateKey) parseElGamalPrivateKey(data []byte) (err error) { return nil } -func (pk *PrivateKey) parseECDSAPrivateKey(data []byte) (err error) { - ecdsaPub := pk.PublicKey.PublicKey.(*ecdsa.PublicKey) +func (pk *PrivateKey) parseECDHPrivateKey(data []byte) (err error) { + pub := pk.PublicKey.PublicKey.(*ecdh.PublicKey) + priv := new(ecdh.PrivateKey) + priv.PublicKey = *pub buf := bytes.NewBuffer(data) d, _, err := readMPI(buf) @@ -369,10 +502,47 @@ func (pk *PrivateKey) parseECDSAPrivateKey(data []byte) (err error) { return } - pk.PrivateKey = &ecdsa.PrivateKey{ - PublicKey: *ecdsaPub, - D: new(big.Int).SetBytes(d), + priv.X = new(big.Int).SetBytes(d) + pk.PrivateKey = priv + pk.Encrypted = false + pk.encryptedData = nil + return nil +} + +func (pk *PrivateKey) parseECDSAPrivateKey(data []byte) (err error) { + ecdsaPub := pk.PublicKey.PublicKey.(*ecdsa.PublicKey) + ecdsaPriv := new(ecdsa.PrivateKey) + ecdsaPriv.PublicKey = *ecdsaPub + + buf := bytes.NewBuffer(data) + d, _, err := readMPI(buf) + if err != nil { + return } + + ecdsaPriv.D = new(big.Int).SetBytes(d) + pk.PrivateKey = ecdsaPriv + pk.Encrypted = false + pk.encryptedData = nil + + return nil +} + +func (pk *PrivateKey) parseEdDSAPrivateKey(data []byte) (err error) { + eddsaPriv := new(EdDSAPrivateKey) + eddsaPriv.PublicKey = pk.PublicKey + + buf := bytes.NewBuffer(data) + eddsaPriv.seed.bytes, eddsaPriv.seed.bitLength, err = readMPI(buf) + if err != nil { + return err + } + + if bLen := len(eddsaPriv.seed.bytes); bLen != 32 { // 32 bytes private part of ed25519 key. + return errors.UnsupportedError(fmt.Sprintf("Unexpected EdDSA private key length: %d", bLen)) + } + + pk.PrivateKey = eddsaPriv pk.Encrypted = false pk.encryptedData = nil diff --git a/vendor/golang.org/x/crypto/openpgp/packet/public_key.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/public_key.go similarity index 73% rename from vendor/golang.org/x/crypto/openpgp/packet/public_key.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/public_key.go index ead26233d..f9760177e 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/public_key.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/public_key.go @@ -10,7 +10,6 @@ import ( "crypto/dsa" "crypto/ecdsa" "crypto/elliptic" - "crypto/rsa" "crypto/sha1" _ "crypto/sha256" _ "crypto/sha512" @@ -22,8 +21,13 @@ import ( "strconv" "time" - "golang.org/x/crypto/openpgp/elgamal" - "golang.org/x/crypto/openpgp/errors" + "github.com/keybase/go-crypto/brainpool" + "github.com/keybase/go-crypto/curve25519" + "github.com/keybase/go-crypto/ed25519" + "github.com/keybase/go-crypto/openpgp/ecdh" + "github.com/keybase/go-crypto/openpgp/elgamal" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/rsa" ) var ( @@ -33,9 +37,19 @@ var ( oidCurveP384 []byte = []byte{0x2B, 0x81, 0x04, 0x00, 0x22} // NIST curve P-521 oidCurveP521 []byte = []byte{0x2B, 0x81, 0x04, 0x00, 0x23} + // Brainpool curve P-256r1 + oidCurveP256r1 []byte = []byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x07} + // Brainpool curve P-384r1 + oidCurveP384r1 []byte = []byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x0B} + // Brainpool curve P-512r1 + oidCurveP512r1 []byte = []byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x0D} + // EdDSA + oidEdDSA []byte = []byte{0x2B, 0x06, 0x01, 0x04, 0x01, 0xDA, 0x47, 0x0F, 0x01} + // cv25519 + oidCurve25519 []byte = []byte{0x2B, 0x06, 0x01, 0x04, 0x01, 0x97, 0x55, 0x01, 0x05, 0x01} ) -const maxOIDLength = 8 +const maxOIDLength = 10 // ecdsaKey stores the algorithm-specific fields for ECDSA keys. // as defined in RFC 6637, Section 9. @@ -46,6 +60,38 @@ type ecdsaKey struct { p parsedMPI } +type edDSAkey struct { + ecdsaKey +} + +func copyFrontFill(dst, src []byte, length int) int { + if srcLen := len(src); srcLen < length { + return copy(dst[length-srcLen:], src[:]) + } else { + return copy(dst[:], src[:]) + } +} + +func (e *edDSAkey) Verify(payload []byte, r parsedMPI, s parsedMPI) bool { + const halfSigSize = ed25519.SignatureSize / 2 + var sig [ed25519.SignatureSize]byte + + // NOTE: The first byte is 0x40 - MPI header + // TODO: Maybe clean the code up and use 0x40 as a header when + // reading and keep only actual number in p field. Find out how + // other MPIs are stored. + key := e.p.bytes[1:] + + // Note: it may happen that R + S do not form 64-byte signature buffer that + // ed25519 expects, but because we copy it over to an array of exact size, + // we will always pass correctly sized slice to Verify. Slice too short + // would make ed25519 panic(). + copyFrontFill(sig[:halfSigSize], r.bytes, halfSigSize) + copyFrontFill(sig[halfSigSize:], s.bytes, halfSigSize) + + return ed25519.Verify(key, payload, sig[:]) +} + // parseOID reads the OID for the curve as defined in RFC 6637, Section 9. func parseOID(r io.Reader) (oid []byte, err error) { buf := make([]byte, maxOIDLength) @@ -67,7 +113,7 @@ func (f *ecdsaKey) parse(r io.Reader) (err error) { return err } f.p.bytes, f.p.bitLength, err = readMPI(r) - return + return err } func (f *ecdsaKey) serialize(w io.Writer) (err error) { @@ -80,17 +126,34 @@ func (f *ecdsaKey) serialize(w io.Writer) (err error) { return writeMPIs(w, f.p) } +func getCurveByOid(oid []byte) elliptic.Curve { + switch { + case bytes.Equal(oid, oidCurveP256): + return elliptic.P256() + case bytes.Equal(oid, oidCurveP384): + return elliptic.P384() + case bytes.Equal(oid, oidCurveP521): + return elliptic.P521() + case bytes.Equal(oid, oidCurveP256r1): + return brainpool.P256r1() + case bytes.Equal(oid, oidCurveP384r1): + return brainpool.P384r1() + case bytes.Equal(oid, oidCurveP512r1): + return brainpool.P512r1() + case bytes.Equal(oid, oidCurve25519): + return curve25519.Cv25519() + default: + return nil + } +} + func (f *ecdsaKey) newECDSA() (*ecdsa.PublicKey, error) { - var c elliptic.Curve - if bytes.Equal(f.oid, oidCurveP256) { - c = elliptic.P256() - } else if bytes.Equal(f.oid, oidCurveP384) { - c = elliptic.P384() - } else if bytes.Equal(f.oid, oidCurveP521) { - c = elliptic.P521() - } else { + var c = getCurveByOid(f.oid) + // Curve25519 should not be used in ECDSA. + if c == nil || bytes.Equal(f.oid, oidCurve25519) { return nil, errors.UnsupportedError(fmt.Sprintf("unsupported oid: %x", f.oid)) } + // Note: Unmarshal already checks if point is on curve. x, y := elliptic.Unmarshal(c, f.p.bytes) if x == nil { return nil, errors.UnsupportedError("failed to parse EC point") @@ -98,6 +161,20 @@ func (f *ecdsaKey) newECDSA() (*ecdsa.PublicKey, error) { return &ecdsa.PublicKey{Curve: c, X: x, Y: y}, nil } +func (f *ecdsaKey) newECDH() (*ecdh.PublicKey, error) { + var c = getCurveByOid(f.oid) + if c == nil { + return nil, errors.UnsupportedError(fmt.Sprintf("unsupported oid: %x", f.oid)) + } + // ecdh.Unmarshal handles unmarshaling for all curve types. It + // also checks if point is on curve. + x, y := ecdh.Unmarshal(c, f.p.bytes) + if x == nil { + return nil, errors.UnsupportedError("failed to parse EC point") + } + return &ecdh.PublicKey{Curve: c, X: x, Y: y}, nil +} + func (f *ecdsaKey) byteLen() int { return 1 + len(f.oid) + 2 + len(f.p.bytes) } @@ -163,6 +240,9 @@ type PublicKey struct { // RFC 6637 fields ec *ecdsaKey ecdh *ecdhKdf + + // EdDSA fields (no RFC available), uses ecdsa scaffolding + edk *edDSAkey } // signingKey provides a convenient abstraction over signature verification @@ -172,21 +252,28 @@ type signingKey interface { serializeWithoutHeaders(io.Writer) error } -func fromBig(n *big.Int) parsedMPI { +func FromBig(n *big.Int) parsedMPI { return parsedMPI{ bytes: n.Bytes(), bitLength: uint16(n.BitLen()), } } +func FromBytes(bytes []byte) parsedMPI { + return parsedMPI{ + bytes: bytes, + bitLength: uint16(8 * len(bytes)), + } +} + // NewRSAPublicKey returns a PublicKey that wraps the given rsa.PublicKey. func NewRSAPublicKey(creationTime time.Time, pub *rsa.PublicKey) *PublicKey { pk := &PublicKey{ CreationTime: creationTime, PubKeyAlgo: PubKeyAlgoRSA, PublicKey: pub, - n: fromBig(pub.N), - e: fromBig(big.NewInt(int64(pub.E))), + n: FromBig(pub.N), + e: FromBig(big.NewInt(int64(pub.E))), } pk.setFingerPrintAndKeyId() @@ -199,25 +286,38 @@ func NewDSAPublicKey(creationTime time.Time, pub *dsa.PublicKey) *PublicKey { CreationTime: creationTime, PubKeyAlgo: PubKeyAlgoDSA, PublicKey: pub, - p: fromBig(pub.P), - q: fromBig(pub.Q), - g: fromBig(pub.G), - y: fromBig(pub.Y), + p: FromBig(pub.P), + q: FromBig(pub.Q), + g: FromBig(pub.G), + y: FromBig(pub.Y), } pk.setFingerPrintAndKeyId() return pk } +// check EdDSA public key material. +// There is currently no RFC for it, but it doesn't mean it's not +// implemented or in use. +func (e *edDSAkey) check() error { + if !bytes.Equal(e.oid, oidEdDSA) { + return errors.UnsupportedError(fmt.Sprintf("Bad OID for EdDSA key: %v", e.oid)) + } + if bLen := len(e.p.bytes); bLen != 33 { // 32 bytes for ed25519 key and 1 byte for 0x40 header + return errors.UnsupportedError(fmt.Sprintf("Unexpected EdDSA public key length: %d", bLen)) + } + return nil +} + // NewElGamalPublicKey returns a PublicKey that wraps the given elgamal.PublicKey. func NewElGamalPublicKey(creationTime time.Time, pub *elgamal.PublicKey) *PublicKey { pk := &PublicKey{ CreationTime: creationTime, PubKeyAlgo: PubKeyAlgoElGamal, PublicKey: pub, - p: fromBig(pub.P), - g: fromBig(pub.G), - y: fromBig(pub.Y), + p: FromBig(pub.P), + g: FromBig(pub.G), + y: FromBig(pub.Y), } pk.setFingerPrintAndKeyId() @@ -231,7 +331,6 @@ func NewECDSAPublicKey(creationTime time.Time, pub *ecdsa.PublicKey) *PublicKey PublicKey: pub, ec: new(ecdsaKey), } - switch pub.Curve { case elliptic.P256(): pk.ec.oid = oidCurveP256 @@ -239,10 +338,13 @@ func NewECDSAPublicKey(creationTime time.Time, pub *ecdsa.PublicKey) *PublicKey pk.ec.oid = oidCurveP384 case elliptic.P521(): pk.ec.oid = oidCurveP521 - default: - panic("unknown elliptic curve") + case brainpool.P256r1(): + pk.ec.oid = oidCurveP256r1 + case brainpool.P384r1(): + pk.ec.oid = oidCurveP384r1 + case brainpool.P512r1(): + pk.ec.oid = oidCurveP512r1 } - pk.ec.p.bytes = elliptic.Marshal(pub.Curve, pub.X, pub.Y) pk.ec.p.bitLength = uint16(8 * len(pk.ec.p.bytes)) @@ -269,6 +371,12 @@ func (pk *PublicKey) parse(r io.Reader) (err error) { err = pk.parseDSA(r) case PubKeyAlgoElGamal: err = pk.parseElGamal(r) + case PubKeyAlgoEdDSA: + pk.edk = new(edDSAkey) + if err = pk.edk.parse(r); err != nil { + return err + } + err = pk.edk.check() case PubKeyAlgoECDSA: pk.ec = new(ecdsaKey) if err = pk.ec.parse(r); err != nil { @@ -284,8 +392,7 @@ func (pk *PublicKey) parse(r io.Reader) (err error) { if err = pk.ecdh.parse(r); err != nil { return } - // The ECDH key is stored in an ecdsa.PublicKey for convenience. - pk.PublicKey, err = pk.ec.newECDSA() + pk.PublicKey, err = pk.ec.newECDH() default: err = errors.UnsupportedError("public key type: " + strconv.Itoa(int(pk.PubKeyAlgo))) } @@ -318,7 +425,7 @@ func (pk *PublicKey) parseRSA(r io.Reader) (err error) { return } - if len(pk.e.bytes) > 3 { + if len(pk.e.bytes) > 7 { err = errors.UnsupportedError("large public exponent") return } @@ -328,7 +435,7 @@ func (pk *PublicKey) parseRSA(r io.Reader) (err error) { } for i := 0; i < len(pk.e.bytes); i++ { rsa.E <<= 8 - rsa.E |= int(pk.e.bytes[i]) + rsa.E |= int64(pk.e.bytes[i]) } pk.PublicKey = rsa return @@ -410,6 +517,8 @@ func (pk *PublicKey) SerializeSignaturePrefix(h io.Writer) { case PubKeyAlgoECDH: pLength += uint16(pk.ec.byteLen()) pLength += uint16(pk.ecdh.byteLen()) + case PubKeyAlgoEdDSA: + pLength += uint16(pk.edk.byteLen()) default: panic("unknown public key algorithm") } @@ -439,6 +548,8 @@ func (pk *PublicKey) Serialize(w io.Writer) (err error) { case PubKeyAlgoECDH: length += pk.ec.byteLen() length += pk.ecdh.byteLen() + case PubKeyAlgoEdDSA: + length += pk.edk.byteLen() default: panic("unknown public key algorithm") } @@ -480,6 +591,8 @@ func (pk *PublicKey) serializeWithoutHeaders(w io.Writer) (err error) { return writeMPIs(w, pk.p, pk.g, pk.y) case PubKeyAlgoECDSA: return pk.ec.serialize(w) + case PubKeyAlgoEdDSA: + return pk.edk.serialize(w) case PubKeyAlgoECDH: if err = pk.ec.serialize(w); err != nil { return @@ -504,9 +617,18 @@ func (pk *PublicKey) VerifySignature(signed hash.Hash, sig *Signature) (err erro signed.Write(sig.HashSuffix) hashBytes := signed.Sum(nil) - if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] { - return errors.SignatureError("hash tag doesn't match") - } + // NOTE(maxtaco) 2016-08-22 + // + // We used to do this: + // + // if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] { + // return errors.SignatureError("hash tag doesn't match") + // } + // + // But don't do anything in this case. Some GPGs generate bad + // 2-byte hash prefixes, but GPG also doesn't seem to care on + // import. See BrentMaxwell's key. I think it's safe to disable + // this check! if pk.PubKeyAlgo != sig.PubKeyAlgo { return errors.InvalidArgumentError("public key and signature use different algorithms") @@ -537,9 +659,15 @@ func (pk *PublicKey) VerifySignature(signed hash.Hash, sig *Signature) (err erro return errors.SignatureError("ECDSA verification failure") } return nil + case PubKeyAlgoEdDSA: + if !pk.edk.Verify(hashBytes, sig.EdDSASigR, sig.EdDSASigS) { + return errors.SignatureError("EdDSA verification failure") + } + return nil default: return errors.SignatureError("Unsupported public key algorithm used in signature") } + panic("unreachable") } // VerifySignatureV3 returns nil iff sig is a valid signature, made by this @@ -584,6 +712,7 @@ func (pk *PublicKey) VerifySignatureV3(signed hash.Hash, sig *SignatureV3) (err default: panic("shouldn't happen") } + panic("unreachable") } // keySignatureHash returns a Hash of the message that needs to be signed for @@ -594,12 +723,18 @@ func keySignatureHash(pk, signed signingKey, hashFunc crypto.Hash) (h hash.Hash, } h = hashFunc.New() + updateKeySignatureHash(pk, signed, h) + + return +} + +// updateKeySignatureHash does the actual hash updates for keySignatureHash. +func updateKeySignatureHash(pk, signed signingKey, h hash.Hash) { // RFC 4880, section 5.2.4 pk.SerializeSignaturePrefix(h) pk.serializeWithoutHeaders(h) signed.SerializeSignaturePrefix(h) signed.serializeWithoutHeaders(h) - return } // VerifyKeySignature returns nil iff sig is a valid signature, made by this @@ -614,6 +749,19 @@ func (pk *PublicKey) VerifyKeySignature(signed *PublicKey, sig *Signature) error } if sig.FlagSign { + + // BUG(maxtaco) + // + // We should check for more than FlagsSign here, because if + // you read keys.go, we can sometimes use signing subkeys even if they're + // not explicitly flagged as such. However, so doing fails lots of currently + // working tests, so I'm not going to do much here. + // + // In other words, we should have this disjunction in the condition above: + // + // || (!sig.FlagsValid && pk.PubKeyAlgo.CanSign()) { + // + // Signing subkeys must be cross-signed. See // https://www.gnupg.org/faq/subkey-cross-certify.html. if sig.EmbeddedSignature == nil { @@ -648,14 +796,27 @@ func keyRevocationHash(pk signingKey, hashFunc crypto.Hash) (h hash.Hash, err er // VerifyRevocationSignature returns nil iff sig is a valid signature, made by this // public key. -func (pk *PublicKey) VerifyRevocationSignature(sig *Signature) (err error) { - h, err := keyRevocationHash(pk, sig.Hash) +func (pk *PublicKey) VerifyRevocationSignature(revokedKey *PublicKey, sig *Signature) (err error) { + h, err := keyRevocationHash(revokedKey, sig.Hash) if err != nil { return err } return pk.VerifySignature(h, sig) } +type teeHash struct { + h hash.Hash +} + +func (t teeHash) Write(b []byte) (n int, err error) { + fmt.Printf("hash -> %s %+v\n", string(b), b) + return t.h.Write(b) +} +func (t teeHash) Sum(b []byte) []byte { return t.h.Sum(b) } +func (t teeHash) Reset() { t.h.Reset() } +func (t teeHash) Size() int { return t.h.Size() } +func (t teeHash) BlockSize() int { return t.h.BlockSize() } + // userIdSignatureHash returns a Hash of the message that needs to be signed // to assert that pk is a valid key for id. func userIdSignatureHash(id string, pk *PublicKey, hashFunc crypto.Hash) (h hash.Hash, err error) { @@ -664,6 +825,14 @@ func userIdSignatureHash(id string, pk *PublicKey, hashFunc crypto.Hash) (h hash } h = hashFunc.New() + updateUserIdSignatureHash(id, pk, h) + + return +} + +// updateUserIdSignatureHash does the actual hash updates for +// userIdSignatureHash. +func updateUserIdSignatureHash(id string, pk *PublicKey, h hash.Hash) { // RFC 4880, section 5.2.4 pk.SerializeSignaturePrefix(h) pk.serializeWithoutHeaders(h) @@ -732,7 +901,9 @@ func writeMPIs(w io.Writer, mpis ...parsedMPI) (err error) { return } -// BitLength returns the bit length for the given public key. +// BitLength returns the bit length for the given public key. Used for +// displaying key information, actual buffers and BigInts inside may +// have non-matching different size if the key is invalid. func (pk *PublicKey) BitLength() (bitLength uint16, err error) { switch pk.PubKeyAlgo { case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: @@ -741,6 +912,17 @@ func (pk *PublicKey) BitLength() (bitLength uint16, err error) { bitLength = pk.p.bitLength case PubKeyAlgoElGamal: bitLength = pk.p.bitLength + case PubKeyAlgoECDH: + ecdhPublicKey := pk.PublicKey.(*ecdh.PublicKey) + bitLength = uint16(ecdhPublicKey.Curve.Params().BitSize) + case PubKeyAlgoECDSA: + ecdsaPublicKey := pk.PublicKey.(*ecdsa.PublicKey) + bitLength = uint16(ecdsaPublicKey.Curve.Params().BitSize) + case PubKeyAlgoEdDSA: + // EdDSA only support ed25519 curves right now, just return + // the length. Also, we don't have any PublicKey.Curve object + // to look the size up from. + bitLength = 256 default: err = errors.InvalidArgumentError("bad public-key algorithm") } diff --git a/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/public_key_v3.go similarity index 97% rename from vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/public_key_v3.go index 5daf7b6cf..52474677b 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/public_key_v3.go @@ -7,7 +7,6 @@ package packet import ( "crypto" "crypto/md5" - "crypto/rsa" "encoding/binary" "fmt" "hash" @@ -16,7 +15,8 @@ import ( "strconv" "time" - "golang.org/x/crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/rsa" ) // PublicKeyV3 represents older, version 3 public keys. These keys are less secure and @@ -42,8 +42,8 @@ func newRSAPublicKeyV3(creationTime time.Time, pub *rsa.PublicKey) *PublicKeyV3 pk := &PublicKeyV3{ CreationTime: creationTime, PublicKey: pub, - n: fromBig(pub.N), - e: fromBig(big.NewInt(int64(pub.E))), + n: FromBig(pub.N), + e: FromBig(big.NewInt(int64(pub.E))), } pk.setFingerPrintAndKeyId() @@ -100,14 +100,14 @@ func (pk *PublicKeyV3) parseRSA(r io.Reader) (err error) { if len(pk.n.bytes) < 8 { return errors.StructuralError("v3 public key modulus is too short") } - if len(pk.e.bytes) > 3 { + if len(pk.e.bytes) > 7 { err = errors.UnsupportedError("large public exponent") return } rsa := &rsa.PublicKey{N: new(big.Int).SetBytes(pk.n.bytes)} for i := 0; i < len(pk.e.bytes); i++ { rsa.E <<= 8 - rsa.E |= int(pk.e.bytes[i]) + rsa.E |= int64(pk.e.bytes[i]) } pk.PublicKey = rsa return @@ -216,6 +216,7 @@ func (pk *PublicKeyV3) VerifySignatureV3(signed hash.Hash, sig *SignatureV3) (er // V3 public keys only support RSA. panic("shouldn't happen") } + panic("unreachable") } // VerifyUserIdSignatureV3 returns nil iff sig is a valid signature, made by this diff --git a/vendor/golang.org/x/crypto/openpgp/packet/reader.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/reader.go similarity index 97% rename from vendor/golang.org/x/crypto/openpgp/packet/reader.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/reader.go index 34bc7c613..957b3b897 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/reader.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/reader.go @@ -5,8 +5,9 @@ package packet import ( - "golang.org/x/crypto/openpgp/errors" "io" + + "github.com/keybase/go-crypto/openpgp/errors" ) // Reader reads packets from an io.Reader and allows packets to be 'unread' so @@ -46,7 +47,6 @@ func (r *Reader) Next() (p Packet, err error) { return nil, err } } - return nil, io.EOF } diff --git a/vendor/golang.org/x/crypto/openpgp/packet/signature.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/signature.go similarity index 76% rename from vendor/golang.org/x/crypto/openpgp/packet/signature.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/signature.go index 6ce0cbedb..46224ad66 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/signature.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/signature.go @@ -9,16 +9,15 @@ import ( "crypto" "crypto/dsa" "crypto/ecdsa" - "encoding/asn1" "encoding/binary" "hash" "io" - "math/big" "strconv" "time" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/s2k" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/s2k" + "github.com/keybase/go-crypto/rsa" ) const ( @@ -29,6 +28,29 @@ const ( KeyFlagEncryptStorage ) +// Signer can be implemented by application code to do actual signing. +type Signer interface { + hash.Hash + Sign(sig *Signature) error + KeyId() uint64 + PublicKeyAlgo() PublicKeyAlgorithm +} + +// RevocationKey represents designated revoker packet. See RFC 4880 +// section 5.2.3.15 for details. +type RevocationKey struct { + Class byte + PublicKeyAlgo PublicKeyAlgorithm + Fingerprint []byte +} + +// KeyFlagBits holds boolean whether any usage flags were provided in +// the signature and BitField with KeyFlag* flags. +type KeyFlagBits struct { + Valid bool + BitField byte +} + // Signature represents a signature. See RFC 4880, section 5.2. type Signature struct { SigType SignatureType @@ -45,6 +67,7 @@ type Signature struct { RSASignature parsedMPI DSASigR, DSASigS parsedMPI ECDSASigR, ECDSASigS parsedMPI + EdDSASigR, EdDSASigS parsedMPI // rawSubpackets contains the unparsed subpackets, in order. rawSubpackets []outputSubpacket @@ -54,8 +77,10 @@ type Signature struct { SigLifetimeSecs, KeyLifetimeSecs *uint32 PreferredSymmetric, PreferredHash, PreferredCompression []uint8 + PreferredKeyServer string IssuerKeyId *uint64 IsPrimaryId *bool + IssuerFingerprint []byte // FlagsValid is set if any flags were given. See RFC 4880, section // 5.2.3.21 for details. @@ -67,6 +92,12 @@ type Signature struct { RevocationReason *uint8 RevocationReasonText string + // PolicyURI is optional. See RFC 4880, Section 5.2.3.20 for details + PolicyURI string + + // Regex is a regex that can match a PGP UID. See RFC 4880, 5.2.3.14 for details + Regex string + // MDC is set if this signature has a feature packet that indicates // support for MDC subpackets. MDC bool @@ -76,6 +107,16 @@ type Signature struct { // subkey as their own. EmbeddedSignature *Signature + // StubbedOutCriticalError is not fail-stop, since it shouldn't break key parsing + // when appearing in WoT-style cross signatures. But it should prevent a signature + // from being applied to a primary or subkey. + StubbedOutCriticalError error + + // DesignaterRevoker will be present if this signature certifies a + // designated revoking key id (3rd party key that can sign + // revocation for this key). + DesignatedRevoker *RevocationKey + outSubpackets []outputSubpacket } @@ -98,7 +139,7 @@ func (sig *Signature) parse(r io.Reader) (err error) { sig.SigType = SignatureType(buf[0]) sig.PubKeyAlgo = PublicKeyAlgorithm(buf[1]) switch sig.PubKeyAlgo { - case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA: + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA, PubKeyAlgoEdDSA: default: err = errors.UnsupportedError("public key algorithm " + strconv.Itoa(int(sig.PubKeyAlgo))) return @@ -162,6 +203,11 @@ func (sig *Signature) parse(r io.Reader) (err error) { if err == nil { sig.DSASigS.bytes, sig.DSASigS.bitLength, err = readMPI(r) } + case PubKeyAlgoEdDSA: + sig.EdDSASigR.bytes, sig.EdDSASigR.bitLength, err = readMPI(r) + if err == nil { + sig.EdDSASigS.bytes, sig.EdDSASigS.bitLength, err = readMPI(r) + } case PubKeyAlgoECDSA: sig.ECDSASigR.bytes, sig.ECDSASigR.bitLength, err = readMPI(r) if err == nil { @@ -195,16 +241,21 @@ type signatureSubpacketType uint8 const ( creationTimeSubpacket signatureSubpacketType = 2 signatureExpirationSubpacket signatureSubpacketType = 3 + regularExpressionSubpacket signatureSubpacketType = 6 keyExpirationSubpacket signatureSubpacketType = 9 prefSymmetricAlgosSubpacket signatureSubpacketType = 11 + revocationKey signatureSubpacketType = 12 issuerSubpacket signatureSubpacketType = 16 prefHashAlgosSubpacket signatureSubpacketType = 21 prefCompressionSubpacket signatureSubpacketType = 22 + prefKeyServerSubpacket signatureSubpacketType = 24 primaryUserIdSubpacket signatureSubpacketType = 25 + policyURISubpacket signatureSubpacketType = 26 keyFlagsSubpacket signatureSubpacketType = 27 reasonForRevocationSubpacket signatureSubpacketType = 29 featuresSubpacket signatureSubpacketType = 30 embeddedSignatureSubpacket signatureSubpacketType = 32 + issuerFingerprint signatureSubpacketType = 33 ) // parseSignatureSubpacket parses a single subpacket. len(subpacket) is >= 1. @@ -382,6 +433,32 @@ func parseSignatureSubpacket(sig *Signature, subpacket []byte, isHashed bool) (r if sigType := sig.EmbeddedSignature.SigType; sigType != SigTypePrimaryKeyBinding { return nil, errors.StructuralError("cross-signature has unexpected type " + strconv.Itoa(int(sigType))) } + case policyURISubpacket: + // See RFC 4880, Section 5.2.3.20 + sig.PolicyURI = string(subpacket[:]) + case regularExpressionSubpacket: + sig.Regex = string(subpacket[:]) + if isCritical { + sig.StubbedOutCriticalError = errors.UnsupportedError("regex support is stubbed out") + } + case prefKeyServerSubpacket: + sig.PreferredKeyServer = string(subpacket[:]) + case issuerFingerprint: + // The first byte is how many bytes the fingerprint is, but we'll just + // read until the end of the subpacket, so we'll ignore it. + sig.IssuerFingerprint = append([]byte{}, subpacket[1:]...) + case revocationKey: + // Authorizes the specified key to issue revocation signatures + // for a key. + + // TODO: Class octet must have bit 0x80 set. If the bit 0x40 + // is set, then this means that the revocation information is + // sensitive. + sig.DesignatedRevoker = &RevocationKey{ + Class: subpacket[0], + PublicKeyAlgo: PublicKeyAlgorithm(subpacket[1]), + Fingerprint: append([]byte{}, subpacket[2:]...), + } default: if isCritical { err = errors.UnsupportedError("unknown critical signature subpacket type " + strconv.Itoa(int(packetType))) @@ -464,6 +541,26 @@ func (sig *Signature) KeyExpired(currentTime time.Time) bool { return currentTime.After(expiry) } +// ExpiresBeforeOther checks if other signature has expiration at +// later date than sig. +func (sig *Signature) ExpiresBeforeOther(other *Signature) bool { + if sig.KeyLifetimeSecs == nil { + // This sig never expires, or has infinitely long expiration + // time. + return false + } else if other.KeyLifetimeSecs == nil { + // This sig expires at some non-infinite point, but the other + // sig never expires. + return true + } + + getExpiryDate := func(s *Signature) time.Time { + return s.CreationTime.Add(time.Duration(*s.KeyLifetimeSecs) * time.Second) + } + + return getExpiryDate(other).After(getExpiryDate(sig)) +} + // buildHashSuffix constructs the HashSuffix member of sig in preparation for signing. func (sig *Signature) buildHashSuffix() (err error) { hashedSubpacketsLen := subpacketsLength(sig.outSubpackets, true) @@ -509,16 +606,27 @@ func (sig *Signature) signPrepareHash(h hash.Hash) (digest []byte, err error) { // On success, the signature is stored in sig. Call Serialize to write it out. // If config is nil, sensible defaults will be used. func (sig *Signature) Sign(h hash.Hash, priv *PrivateKey, config *Config) (err error) { + signer, hashIsSigner := h.(Signer) + + if !hashIsSigner && (priv == nil || priv.PrivateKey == nil) { + err = errors.InvalidArgumentError("attempting to sign with nil PrivateKey") + return + } + sig.outSubpackets = sig.buildSubpackets() digest, err := sig.signPrepareHash(h) if err != nil { return } + if hashIsSigner { + err = signer.Sign(sig) + return + } + switch priv.PubKeyAlgo { case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: - // supports both *rsa.PrivateKey and crypto.Signer - sig.RSASignature.bytes, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, sig.Hash) + sig.RSASignature.bytes, err = rsa.SignPKCS1v15(config.Random(), priv.PrivateKey.(*rsa.PrivateKey), sig.Hash, digest) sig.RSASignature.bitLength = uint16(8 * len(sig.RSASignature.bytes)) case PubKeyAlgoDSA: dsaPriv := priv.PrivateKey.(*dsa.PrivateKey) @@ -536,20 +644,16 @@ func (sig *Signature) Sign(h hash.Hash, priv *PrivateKey, config *Config) (err e sig.DSASigS.bitLength = uint16(8 * len(sig.DSASigS.bytes)) } case PubKeyAlgoECDSA: - var r, s *big.Int - if pk, ok := priv.PrivateKey.(*ecdsa.PrivateKey); ok { - // direct support, avoid asn1 wrapping/unwrapping - r, s, err = ecdsa.Sign(config.Random(), pk, digest) - } else { - var b []byte - b, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, nil) - if err == nil { - r, s, err = unwrapECDSASig(b) - } - } + r, s, err := ecdsa.Sign(config.Random(), priv.PrivateKey.(*ecdsa.PrivateKey), digest) if err == nil { - sig.ECDSASigR = fromBig(r) - sig.ECDSASigS = fromBig(s) + sig.ECDSASigR = FromBig(r) + sig.ECDSASigS = FromBig(s) + } + case PubKeyAlgoEdDSA: + r, s, err := priv.PrivateKey.(*EdDSAPrivateKey).Sign(digest) + if err == nil { + sig.EdDSASigR = FromBytes(r) + sig.EdDSASigS = FromBytes(s) } default: err = errors.UnsupportedError("public key algorithm: " + strconv.Itoa(int(sig.PubKeyAlgo))) @@ -558,19 +662,6 @@ func (sig *Signature) Sign(h hash.Hash, priv *PrivateKey, config *Config) (err e return } -// unwrapECDSASig parses the two integer components of an ASN.1-encoded ECDSA -// signature. -func unwrapECDSASig(b []byte) (r, s *big.Int, err error) { - var ecsdaSig struct { - R, S *big.Int - } - _, err = asn1.Unmarshal(b, &ecsdaSig) - if err != nil { - return - } - return ecsdaSig.R, ecsdaSig.S, nil -} - // SignUserId computes a signature from priv, asserting that pub is a valid // key for the identity id. On success, the signature is stored in sig. Call // Serialize to write it out. @@ -583,6 +674,16 @@ func (sig *Signature) SignUserId(id string, pub *PublicKey, priv *PrivateKey, co return sig.Sign(h, priv, config) } +// SignUserIdWithSigner computes a signature from priv, asserting that pub is a +// valid key for the identity id. On success, the signature is stored in sig. +// Call Serialize to write it out. +// If config is nil, sensible defaults will be used. +func (sig *Signature) SignUserIdWithSigner(id string, pub *PublicKey, s Signer, config *Config) error { + updateUserIdSignatureHash(id, pub, s) + + return sig.Sign(s, nil, config) +} + // SignKey computes a signature from priv, asserting that pub is a subkey. On // success, the signature is stored in sig. Call Serialize to write it out. // If config is nil, sensible defaults will be used. @@ -594,13 +695,25 @@ func (sig *Signature) SignKey(pub *PublicKey, priv *PrivateKey, config *Config) return sig.Sign(h, priv, config) } +// SignKeyWithSigner computes a signature using s, asserting that +// signeePubKey is a subkey. On success, the signature is stored in sig. Call +// Serialize to write it out. If config is nil, sensible defaults will be used. +func (sig *Signature) SignKeyWithSigner(signeePubKey *PublicKey, signerPubKey *PublicKey, s Signer, config *Config) error { + updateKeySignatureHash(signerPubKey, signeePubKey, s) + + return sig.Sign(s, nil, config) +} + // Serialize marshals sig to w. Sign, SignUserId or SignKey must have been // called first. func (sig *Signature) Serialize(w io.Writer) (err error) { if len(sig.outSubpackets) == 0 { sig.outSubpackets = sig.rawSubpackets } - if sig.RSASignature.bytes == nil && sig.DSASigR.bytes == nil && sig.ECDSASigR.bytes == nil { + if sig.RSASignature.bytes == nil && + sig.DSASigR.bytes == nil && + sig.ECDSASigR.bytes == nil && + sig.EdDSASigR.bytes == nil { return errors.InvalidArgumentError("Signature: need to call Sign, SignUserId or SignKey before Serialize") } @@ -611,6 +724,9 @@ func (sig *Signature) Serialize(w io.Writer) (err error) { case PubKeyAlgoDSA: sigLength = 2 + len(sig.DSASigR.bytes) sigLength += 2 + len(sig.DSASigS.bytes) + case PubKeyAlgoEdDSA: + sigLength = 2 + len(sig.EdDSASigR.bytes) + sigLength += 2 + len(sig.EdDSASigS.bytes) case PubKeyAlgoECDSA: sigLength = 2 + len(sig.ECDSASigR.bytes) sigLength += 2 + len(sig.ECDSASigS.bytes) @@ -651,6 +767,8 @@ func (sig *Signature) Serialize(w io.Writer) (err error) { err = writeMPIs(w, sig.RSASignature) case PubKeyAlgoDSA: err = writeMPIs(w, sig.DSASigR, sig.DSASigS) + case PubKeyAlgoEdDSA: + err = writeMPIs(w, sig.EdDSASigR, sig.EdDSASigS) case PubKeyAlgoECDSA: err = writeMPIs(w, sig.ECDSASigR, sig.ECDSASigS) default: @@ -687,20 +805,7 @@ func (sig *Signature) buildSubpackets() (subpackets []outputSubpacket) { // Key flags may only appear in self-signatures or certification signatures. if sig.FlagsValid { - var flags byte - if sig.FlagCertify { - flags |= KeyFlagCertify - } - if sig.FlagSign { - flags |= KeyFlagSign - } - if sig.FlagEncryptCommunications { - flags |= KeyFlagEncryptCommunications - } - if sig.FlagEncryptStorage { - flags |= KeyFlagEncryptStorage - } - subpackets = append(subpackets, outputSubpacket{true, keyFlagsSubpacket, false, []byte{flags}}) + subpackets = append(subpackets, outputSubpacket{true, keyFlagsSubpacket, false, []byte{sig.GetKeyFlags().BitField}}) } // The following subpackets may only appear in self-signatures @@ -729,3 +834,47 @@ func (sig *Signature) buildSubpackets() (subpackets []outputSubpacket) { return } + +func (sig *Signature) GetKeyFlags() (ret KeyFlagBits) { + if !sig.FlagsValid { + return ret + } + + ret.Valid = true + if sig.FlagCertify { + ret.BitField |= KeyFlagCertify + } + if sig.FlagSign { + ret.BitField |= KeyFlagSign + } + if sig.FlagEncryptCommunications { + ret.BitField |= KeyFlagEncryptCommunications + } + if sig.FlagEncryptStorage { + ret.BitField |= KeyFlagEncryptStorage + } + return ret +} + +func (f *KeyFlagBits) HasFlagCertify() bool { + return f.BitField&KeyFlagCertify != 0 +} + +func (f *KeyFlagBits) HasFlagSign() bool { + return f.BitField&KeyFlagSign != 0 +} + +func (f *KeyFlagBits) HasFlagEncryptCommunications() bool { + return f.BitField&KeyFlagEncryptCommunications != 0 +} + +func (f *KeyFlagBits) HasFlagEncryptStorage() bool { + return f.BitField&KeyFlagEncryptStorage != 0 +} + +func (f *KeyFlagBits) Merge(other KeyFlagBits) { + if other.Valid { + f.Valid = true + f.BitField |= other.BitField + } +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/signature_v3.go similarity index 97% rename from vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/signature_v3.go index 6edff8893..dfca651be 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/signature_v3.go @@ -12,8 +12,8 @@ import ( "strconv" "time" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/s2k" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/s2k" ) // SignatureV3 represents older version 3 signatures. These signatures are less secure diff --git a/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/symmetric_key_encrypted.go similarity index 95% rename from vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/symmetric_key_encrypted.go index 4b1105b6f..d2bef0ce5 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/symmetric_key_encrypted.go @@ -10,8 +10,8 @@ import ( "io" "strconv" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/s2k" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/s2k" ) // This is the largest session key that we'll support. Since no 512-bit cipher @@ -48,6 +48,9 @@ func (ske *SymmetricKeyEncrypted) parse(r io.Reader) error { if err != nil { return err } + if ske.s2k == nil { + return errors.UnsupportedError("can't use dummy S2K for symmetric key encryption") + } encryptedKey := make([]byte, maxSessionKeySizeInBytes) // The session key may follow. We just have to try and read to find diff --git a/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/symmetrically_encrypted.go similarity index 99% rename from vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/symmetrically_encrypted.go index 6126030eb..fd4f8f015 100644 --- a/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/packet/symmetrically_encrypted.go @@ -8,10 +8,11 @@ import ( "crypto/cipher" "crypto/sha1" "crypto/subtle" - "golang.org/x/crypto/openpgp/errors" "hash" "io" "strconv" + + "github.com/keybase/go-crypto/openpgp/errors" ) // SymmetricallyEncrypted represents a symmetrically encrypted byte string. The diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/userattribute.go similarity index 100% rename from vendor/golang.org/x/crypto/openpgp/packet/userattribute.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/userattribute.go diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userid.go b/vendor/github.com/keybase/go-crypto/openpgp/packet/userid.go similarity index 100% rename from vendor/golang.org/x/crypto/openpgp/packet/userid.go rename to vendor/github.com/keybase/go-crypto/openpgp/packet/userid.go diff --git a/vendor/github.com/keybase/go-crypto/openpgp/patch.sh b/vendor/github.com/keybase/go-crypto/openpgp/patch.sh new file mode 100644 index 000000000..23cacc83d --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/openpgp/patch.sh @@ -0,0 +1,7 @@ +#!/bin/sh + +patch < sig-v3.patch +patch < s2k-gnu-dummy.patch +find . -type f -name '*.go' -exec sed -i'' -e 's/golang.org\/x\/crypto\/openpgp/github.com\/keybase\/go-crypto\/openpgp/' {} \; +find . -type f -name '*.go-e' -exec rm {} \; +go test ./... diff --git a/vendor/golang.org/x/crypto/openpgp/read.go b/vendor/github.com/keybase/go-crypto/openpgp/read.go similarity index 87% rename from vendor/golang.org/x/crypto/openpgp/read.go rename to vendor/github.com/keybase/go-crypto/openpgp/read.go index 6ec664f44..cde27cba0 100644 --- a/vendor/golang.org/x/crypto/openpgp/read.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/read.go @@ -3,18 +3,19 @@ // license that can be found in the LICENSE file. // Package openpgp implements high level operations on OpenPGP messages. -package openpgp // import "golang.org/x/crypto/openpgp" +package openpgp // import "github.com/keybase/go-crypto/openpgp" import ( "crypto" + "crypto/hmac" _ "crypto/sha256" "hash" "io" "strconv" - "golang.org/x/crypto/openpgp/armor" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/packet" + "github.com/keybase/go-crypto/openpgp/armor" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/packet" ) // SignatureType is the armor type for a PGP signature. @@ -50,7 +51,7 @@ type MessageDetails struct { // If IsSigned is true and SignedBy is non-zero then the signature will // be verified as UnverifiedBody is read. The signature cannot be // checked until the whole of UnverifiedBody is read so UnverifiedBody - // must be consumed until EOF before the data can be trusted. Even if a + // must be consumed until EOF before the data can trusted. Even if a // message isn't signed (or the signer is unknown) the data may contain // an authentication code that is only checked once UnverifiedBody has // been consumed. Once EOF has been seen, the following fields are @@ -113,7 +114,7 @@ ParsePackets: // This packet contains the decryption key encrypted to a public key. md.EncryptedToKeyIds = append(md.EncryptedToKeyIds, p.KeyId) switch p.Algo { - case packet.PubKeyAlgoRSA, packet.PubKeyAlgoRSAEncryptOnly, packet.PubKeyAlgoElGamal: + case packet.PubKeyAlgoRSA, packet.PubKeyAlgoRSAEncryptOnly, packet.PubKeyAlgoElGamal, packet.PubKeyAlgoECDH: break default: continue @@ -122,7 +123,7 @@ ParsePackets: if p.KeyId == 0 { keys = keyring.DecryptionKeys() } else { - keys = keyring.KeysById(p.KeyId) + keys = keyring.KeysById(p.KeyId, nil) } for _, k := range keys { pubKeys = append(pubKeys, keyEnvelopePair{k, p}) @@ -255,7 +256,7 @@ FindLiteralData: md.IsSigned = true md.SignedByKeyId = p.KeyId - keys := keyring.KeysByIdUsage(p.KeyId, packet.KeyFlagSign) + keys := keyring.KeysByIdUsage(p.KeyId, nil, packet.KeyFlagSign) if len(keys) > 0 { md.SignedBy = &keys[0] } @@ -336,7 +337,16 @@ func (scr *signatureCheckReader) Read(buf []byte) (n int, err error) { var ok bool if scr.md.Signature, ok = p.(*packet.Signature); ok { - scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature) + var err error + if fingerprint := scr.md.Signature.IssuerFingerprint; fingerprint != nil { + if !hmac.Equal(fingerprint, scr.md.SignedBy.PublicKey.Fingerprint[:]) { + err = errors.StructuralError("bad key fingerprint") + } + } + if err == nil { + err = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature) + } + scr.md.SignatureError = err } else if scr.md.SignatureV3, ok = p.(*packet.SignatureV3); ok { scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignatureV3(scr.h, scr.md.SignatureV3) } else { @@ -361,7 +371,13 @@ func (scr *signatureCheckReader) Read(buf []byte) (n int, err error) { // returns the signer if the signature is valid. If the signer isn't known, // ErrUnknownIssuer is returned. func CheckDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, err error) { + signer, _, err = checkDetachedSignature(keyring, signed, signature) + return signer, err +} + +func checkDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, issuer *uint64, err error) { var issuerKeyId uint64 + var issuerFingerprint []byte var hashFunc crypto.Hash var sigType packet.SignatureType var keys []Key @@ -371,29 +387,30 @@ func CheckDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signe for { p, err = packets.Next() if err == io.EOF { - return nil, errors.ErrUnknownIssuer + return nil, nil, errors.ErrUnknownIssuer } if err != nil { - return nil, err + return nil, nil, err } switch sig := p.(type) { case *packet.Signature: if sig.IssuerKeyId == nil { - return nil, errors.StructuralError("signature doesn't have an issuer") + return nil, nil, errors.StructuralError("signature doesn't have an issuer") } issuerKeyId = *sig.IssuerKeyId hashFunc = sig.Hash sigType = sig.SigType + issuerFingerprint = sig.IssuerFingerprint case *packet.SignatureV3: issuerKeyId = sig.IssuerKeyId hashFunc = sig.Hash sigType = sig.SigType default: - return nil, errors.StructuralError("non signature packet found") + return nil, nil, errors.StructuralError("non signature packet found") } - keys = keyring.KeysByIdUsage(issuerKeyId, packet.KeyFlagSign) + keys = keyring.KeysByIdUsage(issuerKeyId, issuerFingerprint, packet.KeyFlagSign) if len(keys) > 0 { break } @@ -405,11 +422,11 @@ func CheckDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signe h, wrappedHash, err := hashForSignature(hashFunc, sigType) if err != nil { - return nil, err + return nil, nil, err } if _, err := io.Copy(wrappedHash, signed); err != nil && err != io.EOF { - return nil, err + return nil, nil, err } for _, key := range keys { @@ -423,20 +440,24 @@ func CheckDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signe } if err == nil { - return key.Entity, nil + return key.Entity, &issuerKeyId, nil } } - return nil, err + return nil, nil, err } // CheckArmoredDetachedSignature performs the same actions as // CheckDetachedSignature but expects the signature to be armored. func CheckArmoredDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, err error) { + signer, _, err = checkArmoredDetachedSignature(keyring, signed, signature) + return signer, err +} + +func checkArmoredDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, issuer *uint64, err error) { body, err := readArmored(signature, SignatureType) if err != nil { return } - - return CheckDetachedSignature(keyring, signed, body) + return checkDetachedSignature(keyring, signed, body) } diff --git a/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go b/vendor/github.com/keybase/go-crypto/openpgp/s2k/s2k.go similarity index 83% rename from vendor/golang.org/x/crypto/openpgp/s2k/s2k.go rename to vendor/github.com/keybase/go-crypto/openpgp/s2k/s2k.go index 4b9a44ca2..01bb67852 100644 --- a/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/s2k/s2k.go @@ -4,7 +4,7 @@ // Package s2k implements the various OpenPGP string-to-key transforms as // specified in RFC 4800 section 3.7.1. -package s2k // import "golang.org/x/crypto/openpgp/s2k" +package s2k // import "github.com/keybase/go-crypto/openpgp/s2k" import ( "crypto" @@ -12,7 +12,7 @@ import ( "io" "strconv" - "golang.org/x/crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/errors" ) // Config collects configuration parameters for s2k key-stretching @@ -151,6 +151,53 @@ func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int) { } } +func parseGNUExtensions(r io.Reader) (f func(out, in []byte), err error) { + var buf [9]byte + + // A three-byte string identifier + _, err = io.ReadFull(r, buf[:3]) + if err != nil { + return + } + gnuExt := string(buf[:3]) + + if gnuExt != "GNU" { + return nil, errors.UnsupportedError("Malformed GNU extension: " + gnuExt) + } + _, err = io.ReadFull(r, buf[:1]) + if err != nil { + return + } + gnuExtType := int(buf[0]) + switch gnuExtType { + case 1: + return nil, nil + case 2: + // Read a serial number, which is prefixed by a 1-byte length. + // The maximum length is 16. + var lenBuf [1]byte + _, err = io.ReadFull(r, lenBuf[:]) + if err != nil { + return + } + + maxLen := 16 + ivLen := int(lenBuf[0]) + if ivLen > maxLen { + ivLen = maxLen + } + ivBuf := make([]byte, ivLen) + // For now we simply discard the IV + _, err = io.ReadFull(r, ivBuf) + if err != nil { + return + } + return nil, nil + default: + return nil, errors.UnsupportedError("unknown S2K GNU protection mode: " + strconv.Itoa(int(gnuExtType))) + } +} + // Parse reads a binary specification for a string-to-key transformation from r // and returns a function which performs that transform. func Parse(r io.Reader) (f func(out, in []byte), err error) { @@ -161,6 +208,12 @@ func Parse(r io.Reader) (f func(out, in []byte), err error) { return } + // GNU Extensions; handle them before we try to look for a hash, which won't + // be needed in most cases anyway. + if buf[0] == 101 { + return parseGNUExtensions(r) + } + hash, ok := HashIdToHash(buf[1]) if !ok { return nil, errors.UnsupportedError("hash for S2K function: " + strconv.Itoa(int(buf[1]))) @@ -251,7 +304,7 @@ func HashIdToHash(id byte) (h crypto.Hash, ok bool) { } // HashIdToString returns the name of the hash function corresponding to the -// given OpenPGP hash id. +// given OpenPGP hash id, or panics if id is unknown. func HashIdToString(id byte) (name string, ok bool) { for _, m := range hashToHashIdMapping { if m.id == id { diff --git a/vendor/github.com/keybase/go-crypto/openpgp/sig-v3.patch b/vendor/github.com/keybase/go-crypto/openpgp/sig-v3.patch new file mode 100644 index 000000000..bfd764afe --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/openpgp/sig-v3.patch @@ -0,0 +1,135 @@ +diff --git a/openpgp/read.go b/openpgp/read.go +index a6cecc5..0c9397b 100644 +--- a/openpgp/read.go ++++ b/openpgp/read.go +@@ -56,8 +56,9 @@ type MessageDetails struct { + // been consumed. Once EOF has been seen, the following fields are + // valid. (An authentication code failure is reported as a + // SignatureError error when reading from UnverifiedBody.) +- SignatureError error // nil if the signature is good. +- Signature *packet.Signature // the signature packet itself. ++ SignatureError error // nil if the signature is good. ++ Signature *packet.Signature // the signature packet itself, if v4 (default) ++ SignatureV3 *packet.SignatureV3 // the signature packet if it is a v2 or v3 signature + + decrypted io.ReadCloser + } +@@ -334,13 +335,15 @@ func (scr *signatureCheckReader) Read(buf []byte) (n int, err error) { + } + + var ok bool +- if scr.md.Signature, ok = p.(*packet.Signature); !ok { ++ if scr.md.Signature, ok = p.(*packet.Signature); ok { ++ scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature) ++ } else if scr.md.SignatureV3, ok = p.(*packet.SignatureV3); ok { ++ scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignatureV3(scr.h, scr.md.SignatureV3) ++ } else { + scr.md.SignatureError = errors.StructuralError("LiteralData not followed by Signature") + return + } + +- scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature) +- + // The SymmetricallyEncrypted packet, if any, might have an + // unsigned hash of its own. In order to check this we need to + // close that Reader. +diff --git a/openpgp/read_test.go b/openpgp/read_test.go +index 52f942c..abe8d7b 100644 +--- a/openpgp/read_test.go ++++ b/openpgp/read_test.go +@@ -13,6 +13,7 @@ import ( + "strings" + "testing" + ++ "golang.org/x/crypto/openpgp/armor" + "golang.org/x/crypto/openpgp/errors" + ) + +@@ -411,6 +412,50 @@ func TestIssue11504(t *testing.T) { + testReadMessageError(t, "9303000130303030303030303030983002303030303030030000000130") + } + ++// TestSignatureV3Message tests the verification of V3 signature, generated ++// with a modern V4-style key. Some people have their clients set to generate ++// V3 signatures, so it's useful to be able to verify them. ++func TestSignatureV3Message(t *testing.T) { ++ sig, err := armor.Decode(strings.NewReader(signedMessageV3)) ++ if err != nil { ++ t.Error(err) ++ return ++ } ++ key, err := ReadArmoredKeyRing(strings.NewReader(keyV4forVerifyingSignedMessageV3)) ++ if err != nil { ++ t.Error(err) ++ return ++ } ++ md, err := ReadMessage(sig.Body, key, nil, nil) ++ if err != nil { ++ t.Error(err) ++ return ++ } ++ ++ _, err = ioutil.ReadAll(md.UnverifiedBody) ++ if err != nil { ++ t.Error(err) ++ return ++ } ++ ++ // We'll see a sig error here after reading in the UnverifiedBody above, ++ // if there was one to see. ++ if err = md.SignatureError; err != nil { ++ t.Error(err) ++ return ++ } ++ ++ if md.SignatureV3 == nil { ++ t.Errorf("No available signature after checking signature") ++ return ++ } ++ if md.Signature != nil { ++ t.Errorf("Did not expect a signature V4 back") ++ return ++ } ++ return ++} ++ + const testKey1KeyId = 0xA34D7E18C20C31BB + const testKey3KeyId = 0x338934250CCC0360 + +@@ -504,3 +549,36 @@ const unknownHashFunctionHex = `8a00000040040001990006050253863c24000a09103b4fe6 + const missingHashFunctionHex = `8a00000040040001030006050253863c24000a09103b4fe6acc0b21f32ffff0101010101010101010101010101010101010101010101010101010101010101010101010101` + + const campbellQuine = `a0b001000300fcffa0b001000d00f2ff000300fcffa0b001000d00f2ff8270a01c00000500faff8270a01c00000500faff000500faff001400ebff8270a01c00000500faff000500faff001400ebff428821c400001400ebff428821c400001400ebff428821c400001400ebff428821c400001400ebff428821c400000000ffff000000ffff000b00f4ff428821c400000000ffff000000ffff000b00f4ff0233214c40000100feff000233214c40000100feff0000` ++ ++const keyV4forVerifyingSignedMessageV3 = `-----BEGIN PGP PUBLIC KEY BLOCK----- ++Comment: GPGTools - https://gpgtools.org ++ ++mI0EVfxoFQEEAMBIqmbDfYygcvP6Phr1wr1XI41IF7Qixqybs/foBF8qqblD9gIY ++BKpXjnBOtbkcVOJ0nljd3/sQIfH4E0vQwK5/4YRQSI59eKOqd6Fx+fWQOLG+uu6z ++tewpeCj9LLHvibx/Sc7VWRnrznia6ftrXxJ/wHMezSab3tnGC0YPVdGNABEBAAG0 ++JEdvY3J5cHRvIFRlc3QgS2V5IDx0aGVtYXhAZ21haWwuY29tPoi5BBMBCgAjBQJV ++/GgVAhsDBwsJCAcDAgEGFQgCCQoLBBYCAwECHgECF4AACgkQeXnQmhdGW9PFVAP+ ++K7TU0qX5ArvIONIxh/WAweyOk884c5cE8f+3NOPOOCRGyVy0FId5A7MmD5GOQh4H ++JseOZVEVCqlmngEvtHZb3U1VYtVGE5WZ+6rQhGsMcWP5qaT4soYwMBlSYxgYwQcx ++YhN9qOr292f9j2Y//TTIJmZT4Oa+lMxhWdqTfX+qMgG4jQRV/GgVAQQArhFSiij1 ++b+hT3dnapbEU+23Z1yTu1DfF6zsxQ4XQWEV3eR8v+8mEDDNcz8oyyF56k6UQ3rXi ++UMTIwRDg4V6SbZmaFbZYCOwp/EmXJ3rfhm7z7yzXj2OFN22luuqbyVhuL7LRdB0M ++pxgmjXb4tTvfgKd26x34S+QqUJ7W6uprY4sAEQEAAYifBBgBCgAJBQJV/GgVAhsM ++AAoJEHl50JoXRlvT7y8D/02ckx4OMkKBZo7viyrBw0MLG92i+DC2bs35PooHR6zz ++786mitjOp5z2QWNLBvxC70S0qVfCIz8jKupO1J6rq6Z8CcbLF3qjm6h1omUBf8Nd ++EfXKD2/2HV6zMKVknnKzIEzauh+eCKS2CeJUSSSryap/QLVAjRnckaES/OsEWhNB ++=RZia ++-----END PGP PUBLIC KEY BLOCK----- ++` ++ ++const signedMessageV3 = `-----BEGIN PGP MESSAGE----- ++Comment: GPGTools - https://gpgtools.org ++ ++owGbwMvMwMVYWXlhlrhb9GXG03JJDKF/MtxDMjKLFYAoUaEktbhEITe1uDgxPVWP ++q5NhKjMrWAVcC9evD8z/bF/uWNjqtk/X3y5/38XGRQHm/57rrDRYuGnTw597Xqka ++uM3137/hH3Os+Jf2dc0fXOITKwJvXJvecPVs0ta+Vg7ZO1MLn8w58Xx+6L58mbka ++DGHyU9yTueZE8D+QF/Tz28Y78dqtF56R1VPn9Xw4uJqrWYdd7b3vIZ1V6R4Nh05d ++iT57d/OhWwA= ++=hG7R ++-----END PGP MESSAGE----- ++` diff --git a/vendor/golang.org/x/crypto/openpgp/write.go b/vendor/github.com/keybase/go-crypto/openpgp/write.go similarity index 74% rename from vendor/golang.org/x/crypto/openpgp/write.go rename to vendor/github.com/keybase/go-crypto/openpgp/write.go index 65a304cc8..03b019e78 100644 --- a/vendor/golang.org/x/crypto/openpgp/write.go +++ b/vendor/github.com/keybase/go-crypto/openpgp/write.go @@ -11,10 +11,10 @@ import ( "strconv" "time" - "golang.org/x/crypto/openpgp/armor" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/packet" - "golang.org/x/crypto/openpgp/s2k" + "github.com/keybase/go-crypto/openpgp/armor" + "github.com/keybase/go-crypto/openpgp/errors" + "github.com/keybase/go-crypto/openpgp/packet" + "github.com/keybase/go-crypto/openpgp/s2k" ) // DetachSign signs message with the private key from signer (which must @@ -59,20 +59,57 @@ func armoredDetachSign(w io.Writer, signer *Entity, message io.Reader, sigType p return out.Close() } +// SignWithSigner signs the message of type sigType with s and writes the +// signature to w. +// If config is nil, sensible defaults will be used. +func SignWithSigner(s packet.Signer, w io.Writer, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) { + keyId := s.KeyId() + sig := new(packet.Signature) + sig.SigType = sigType + sig.PubKeyAlgo = s.PublicKeyAlgo() + sig.Hash = config.Hash() + sig.CreationTime = config.Now() + sig.IssuerKeyId = &keyId + + s.Reset() + + wrapped := s.(hash.Hash) + + if sigType == packet.SigTypeText { + wrapped = NewCanonicalTextHash(s) + } + + io.Copy(wrapped, message) + + err = sig.Sign(s, nil, config) + if err != nil { + return + } + + err = sig.Serialize(w) + + return +} + func detachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) { - if signer.PrivateKey == nil { + signerSubkey, ok := signer.signingKey(config.Now()) + if !ok { + err = errors.InvalidArgumentError("no valid signing keys") + return + } + if signerSubkey.PrivateKey == nil { return errors.InvalidArgumentError("signing key doesn't have a private key") } - if signer.PrivateKey.Encrypted { + if signerSubkey.PrivateKey.Encrypted { return errors.InvalidArgumentError("signing key is encrypted") } sig := new(packet.Signature) sig.SigType = sigType - sig.PubKeyAlgo = signer.PrivateKey.PubKeyAlgo + sig.PubKeyAlgo = signerSubkey.PrivateKey.PubKeyAlgo sig.Hash = config.Hash() sig.CreationTime = config.Now() - sig.IssuerKeyId = &signer.PrivateKey.KeyId + sig.IssuerKeyId = &signerSubkey.PrivateKey.KeyId h, wrappedHash, err := hashForSignature(sig.Hash, sig.SigType) if err != nil { @@ -80,7 +117,7 @@ func detachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.S } io.Copy(wrappedHash, message) - err = sig.Sign(h, signer.PrivateKey, config) + err = sig.Sign(h, signerSubkey.PrivateKey, config) if err != nil { return } @@ -198,11 +235,20 @@ func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHint hashToHashId(crypto.SHA1), hashToHashId(crypto.RIPEMD160), } - // In the event that a recipient doesn't specify any supported ciphers - // or hash functions, these are the ones that we assume that every - // implementation supports. - defaultCiphers := candidateCiphers[len(candidateCiphers)-1:] - defaultHashes := candidateHashes[len(candidateHashes)-1:] + + // If no preferences were specified, assume something safe and reasonable. + defaultCiphers := []uint8{ + uint8(packet.CipherAES128), + uint8(packet.CipherAES192), + uint8(packet.CipherAES256), + uint8(packet.CipherCAST5), + } + + defaultHashes := []uint8{ + hashToHashId(crypto.SHA256), + hashToHashId(crypto.SHA512), + hashToHashId(crypto.RIPEMD160), + } encryptKeys := make([]Key, len(to)) for i := range to { @@ -226,12 +272,15 @@ func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHint candidateHashes = intersectPreferences(candidateHashes, preferredHashes) } - if len(candidateCiphers) == 0 || len(candidateHashes) == 0 { - return nil, errors.InvalidArgumentError("cannot encrypt because recipient set shares no common algorithms") + if len(candidateCiphers) == 0 { + return nil, errors.InvalidArgumentError("cannot encrypt because recipient set shares no common ciphers") + } + if len(candidateHashes) == 0 { + return nil, errors.InvalidArgumentError("cannot encrypt because recipient set shares no common hashes") } cipher := packet.CipherFunction(candidateCiphers[0]) - // If the cipher specified by config is a candidate, we'll use that. + // If the cipher specifed by config is a candidate, we'll use that. configuredCipher := config.Cipher() for _, c := range candidateCiphers { cipherFunc := packet.CipherFunction(c) @@ -376,3 +425,71 @@ func (c noOpCloser) Write(data []byte) (n int, err error) { func (c noOpCloser) Close() error { return nil } + +// AttachedSign is like openpgp.Encrypt (as in p.crypto/openpgp/write.go), but +// don't encrypt at all, just sign the literal unencrypted data. +// Unfortunately we need to duplicate some code here that's already +// in write.go +func AttachedSign(out io.WriteCloser, signed Entity, hints *FileHints, + config *packet.Config) (in io.WriteCloser, err error) { + + if hints == nil { + hints = &FileHints{} + } + + if config == nil { + config = &packet.Config{} + } + + var signer *packet.PrivateKey + + signKey, ok := signed.signingKey(config.Now()) + if !ok { + err = errors.InvalidArgumentError("no valid signing keys") + return + } + signer = signKey.PrivateKey + if signer == nil { + err = errors.InvalidArgumentError("no valid signing keys") + return + } + if signer.Encrypted { + err = errors.InvalidArgumentError("signing key must be decrypted") + return + } + + hasher := crypto.SHA512 + + ops := &packet.OnePassSignature{ + SigType: packet.SigTypeBinary, + Hash: hasher, + PubKeyAlgo: signer.PubKeyAlgo, + KeyId: signer.KeyId, + IsLast: true, + } + + if err = ops.Serialize(out); err != nil { + return + } + + var epochSeconds uint32 + if !hints.ModTime.IsZero() { + epochSeconds = uint32(hints.ModTime.Unix()) + } + + // We don't want the literal serializer to closer the output stream + // since we're going to need to write to it when we finish up the + // signature stuff. + in, err = packet.SerializeLiteral(noOpCloser{out}, hints.IsBinary, hints.FileName, epochSeconds) + + if err != nil { + return + } + + // If we need to write a signature packet after the literal + // data then we need to stop literalData from closing + // encryptedData. + in = signatureWriter{out, in, hasher, hasher.New(), signer, config} + + return +} diff --git a/vendor/github.com/keybase/go-crypto/rsa/pkcs1v15.go b/vendor/github.com/keybase/go-crypto/rsa/pkcs1v15.go new file mode 100644 index 000000000..5c5f415c8 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/rsa/pkcs1v15.go @@ -0,0 +1,325 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package rsa + +import ( + "crypto" + "crypto/subtle" + "errors" + "io" + "math/big" +) + +// This file implements encryption and decryption using PKCS#1 v1.5 padding. + +// PKCS1v15DecrypterOpts is for passing options to PKCS#1 v1.5 decryption using +// the crypto.Decrypter interface. +type PKCS1v15DecryptOptions struct { + // SessionKeyLen is the length of the session key that is being + // decrypted. If not zero, then a padding error during decryption will + // cause a random plaintext of this length to be returned rather than + // an error. These alternatives happen in constant time. + SessionKeyLen int +} + +// EncryptPKCS1v15 encrypts the given message with RSA and the padding scheme from PKCS#1 v1.5. +// The message must be no longer than the length of the public modulus minus 11 bytes. +// +// The rand parameter is used as a source of entropy to ensure that encrypting +// the same message twice doesn't result in the same ciphertext. +// +// WARNING: use of this function to encrypt plaintexts other than session keys +// is dangerous. Use RSA OAEP in new protocols. +func EncryptPKCS1v15(rand io.Reader, pub *PublicKey, msg []byte) (out []byte, err error) { + if err := checkPub(pub); err != nil { + return nil, err + } + k := (pub.N.BitLen() + 7) / 8 + if len(msg) > k-11 { + err = ErrMessageTooLong + return + } + + // EM = 0x00 || 0x02 || PS || 0x00 || M + em := make([]byte, k) + em[1] = 2 + ps, mm := em[2:len(em)-len(msg)-1], em[len(em)-len(msg):] + err = nonZeroRandomBytes(ps, rand) + if err != nil { + return + } + em[len(em)-len(msg)-1] = 0 + copy(mm, msg) + + m := new(big.Int).SetBytes(em) + c := encrypt(new(big.Int), pub, m) + + copyWithLeftPad(em, c.Bytes()) + out = em + return +} + +// DecryptPKCS1v15 decrypts a plaintext using RSA and the padding scheme from PKCS#1 v1.5. +// If rand != nil, it uses RSA blinding to avoid timing side-channel attacks. +// +// Note that whether this function returns an error or not discloses secret +// information. If an attacker can cause this function to run repeatedly and +// learn whether each instance returned an error then they can decrypt and +// forge signatures as if they had the private key. See +// DecryptPKCS1v15SessionKey for a way of solving this problem. +func DecryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) (out []byte, err error) { + if err := checkPub(&priv.PublicKey); err != nil { + return nil, err + } + valid, out, index, err := decryptPKCS1v15(rand, priv, ciphertext) + if err != nil { + return + } + if valid == 0 { + return nil, ErrDecryption + } + out = out[index:] + return +} + +// DecryptPKCS1v15SessionKey decrypts a session key using RSA and the padding scheme from PKCS#1 v1.5. +// If rand != nil, it uses RSA blinding to avoid timing side-channel attacks. +// It returns an error if the ciphertext is the wrong length or if the +// ciphertext is greater than the public modulus. Otherwise, no error is +// returned. If the padding is valid, the resulting plaintext message is copied +// into key. Otherwise, key is unchanged. These alternatives occur in constant +// time. It is intended that the user of this function generate a random +// session key beforehand and continue the protocol with the resulting value. +// This will remove any possibility that an attacker can learn any information +// about the plaintext. +// See ``Chosen Ciphertext Attacks Against Protocols Based on the RSA +// Encryption Standard PKCS #1'', Daniel Bleichenbacher, Advances in Cryptology +// (Crypto '98). +// +// Note that if the session key is too small then it may be possible for an +// attacker to brute-force it. If they can do that then they can learn whether +// a random value was used (because it'll be different for the same ciphertext) +// and thus whether the padding was correct. This defeats the point of this +// function. Using at least a 16-byte key will protect against this attack. +func DecryptPKCS1v15SessionKey(rand io.Reader, priv *PrivateKey, ciphertext []byte, key []byte) (err error) { + if err := checkPub(&priv.PublicKey); err != nil { + return err + } + k := (priv.N.BitLen() + 7) / 8 + if k-(len(key)+3+8) < 0 { + return ErrDecryption + } + + valid, em, index, err := decryptPKCS1v15(rand, priv, ciphertext) + if err != nil { + return + } + + if len(em) != k { + // This should be impossible because decryptPKCS1v15 always + // returns the full slice. + return ErrDecryption + } + + valid &= subtle.ConstantTimeEq(int32(len(em)-index), int32(len(key))) + subtle.ConstantTimeCopy(valid, key, em[len(em)-len(key):]) + return +} + +// decryptPKCS1v15 decrypts ciphertext using priv and blinds the operation if +// rand is not nil. It returns one or zero in valid that indicates whether the +// plaintext was correctly structured. In either case, the plaintext is +// returned in em so that it may be read independently of whether it was valid +// in order to maintain constant memory access patterns. If the plaintext was +// valid then index contains the index of the original message in em. +func decryptPKCS1v15(rand io.Reader, priv *PrivateKey, ciphertext []byte) (valid int, em []byte, index int, err error) { + k := (priv.N.BitLen() + 7) / 8 + if k < 11 { + err = ErrDecryption + return + } + + c := new(big.Int).SetBytes(ciphertext) + m, err := decrypt(rand, priv, c) + if err != nil { + return + } + + em = leftPad(m.Bytes(), k) + firstByteIsZero := subtle.ConstantTimeByteEq(em[0], 0) + secondByteIsTwo := subtle.ConstantTimeByteEq(em[1], 2) + + // The remainder of the plaintext must be a string of non-zero random + // octets, followed by a 0, followed by the message. + // lookingForIndex: 1 iff we are still looking for the zero. + // index: the offset of the first zero byte. + lookingForIndex := 1 + + for i := 2; i < len(em); i++ { + equals0 := subtle.ConstantTimeByteEq(em[i], 0) + index = subtle.ConstantTimeSelect(lookingForIndex&equals0, i, index) + lookingForIndex = subtle.ConstantTimeSelect(equals0, 0, lookingForIndex) + } + + // The PS padding must be at least 8 bytes long, and it starts two + // bytes into em. + validPS := subtle.ConstantTimeLessOrEq(2+8, index) + + valid = firstByteIsZero & secondByteIsTwo & (^lookingForIndex & 1) & validPS + index = subtle.ConstantTimeSelect(valid, index+1, 0) + return valid, em, index, nil +} + +// nonZeroRandomBytes fills the given slice with non-zero random octets. +func nonZeroRandomBytes(s []byte, rand io.Reader) (err error) { + _, err = io.ReadFull(rand, s) + if err != nil { + return + } + + for i := 0; i < len(s); i++ { + for s[i] == 0 { + _, err = io.ReadFull(rand, s[i:i+1]) + if err != nil { + return + } + // In tests, the PRNG may return all zeros so we do + // this to break the loop. + s[i] ^= 0x42 + } + } + + return +} + +// These are ASN1 DER structures: +// DigestInfo ::= SEQUENCE { +// digestAlgorithm AlgorithmIdentifier, +// digest OCTET STRING +// } +// For performance, we don't use the generic ASN1 encoder. Rather, we +// precompute a prefix of the digest value that makes a valid ASN1 DER string +// with the correct contents. +var hashPrefixes = map[crypto.Hash][]byte{ + crypto.MD5: {0x30, 0x20, 0x30, 0x0c, 0x06, 0x08, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05, 0x05, 0x00, 0x04, 0x10}, + crypto.SHA1: {0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14}, + crypto.SHA224: {0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1c}, + crypto.SHA256: {0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20}, + crypto.SHA384: {0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30}, + crypto.SHA512: {0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40}, + crypto.MD5SHA1: {}, // A special TLS case which doesn't use an ASN1 prefix. + crypto.RIPEMD160: {0x30, 0x20, 0x30, 0x08, 0x06, 0x06, 0x28, 0xcf, 0x06, 0x03, 0x00, 0x31, 0x04, 0x14}, +} + +// SignPKCS1v15 calculates the signature of hashed using RSASSA-PKCS1-V1_5-SIGN from RSA PKCS#1 v1.5. +// Note that hashed must be the result of hashing the input message using the +// given hash function. If hash is zero, hashed is signed directly. This isn't +// advisable except for interoperability. +// +// If rand is not nil then RSA blinding will be used to avoid timing side-channel attacks. +// +// This function is deterministic. Thus, if the set of possible messages is +// small, an attacker may be able to build a map from messages to signatures +// and identify the signed messages. As ever, signatures provide authenticity, +// not confidentiality. +func SignPKCS1v15(rand io.Reader, priv *PrivateKey, hash crypto.Hash, hashed []byte) (s []byte, err error) { + hashLen, prefix, err := pkcs1v15HashInfo(hash, len(hashed)) + if err != nil { + return + } + + tLen := len(prefix) + hashLen + k := (priv.N.BitLen() + 7) / 8 + if k < tLen+11 { + return nil, ErrMessageTooLong + } + + // EM = 0x00 || 0x01 || PS || 0x00 || T + em := make([]byte, k) + em[1] = 1 + for i := 2; i < k-tLen-1; i++ { + em[i] = 0xff + } + copy(em[k-tLen:k-hashLen], prefix) + copy(em[k-hashLen:k], hashed) + + m := new(big.Int).SetBytes(em) + c, err := decryptAndCheck(rand, priv, m) + if err != nil { + return + } + + copyWithLeftPad(em, c.Bytes()) + s = em + return +} + +// VerifyPKCS1v15 verifies an RSA PKCS#1 v1.5 signature. +// hashed is the result of hashing the input message using the given hash +// function and sig is the signature. A valid signature is indicated by +// returning a nil error. If hash is zero then hashed is used directly. This +// isn't advisable except for interoperability. +func VerifyPKCS1v15(pub *PublicKey, hash crypto.Hash, hashed []byte, sig []byte) (err error) { + hashLen, prefix, err := pkcs1v15HashInfo(hash, len(hashed)) + if err != nil { + return + } + + tLen := len(prefix) + hashLen + k := (pub.N.BitLen() + 7) / 8 + if k < tLen+11 { + err = ErrVerification + return + } + + c := new(big.Int).SetBytes(sig) + m := encrypt(new(big.Int), pub, c) + em := leftPad(m.Bytes(), k) + // EM = 0x00 || 0x01 || PS || 0x00 || T + + ok := subtle.ConstantTimeByteEq(em[0], 0) + ok &= subtle.ConstantTimeByteEq(em[1], 1) + ok &= subtle.ConstantTimeCompare(em[k-hashLen:k], hashed) + ok &= subtle.ConstantTimeCompare(em[k-tLen:k-hashLen], prefix) + ok &= subtle.ConstantTimeByteEq(em[k-tLen-1], 0) + + for i := 2; i < k-tLen-1; i++ { + ok &= subtle.ConstantTimeByteEq(em[i], 0xff) + } + + if ok != 1 { + return ErrVerification + } + + return nil +} + +func pkcs1v15HashInfo(hash crypto.Hash, inLen int) (hashLen int, prefix []byte, err error) { + // Special case: crypto.Hash(0) is used to indicate that the data is + // signed directly. + if hash == 0 { + return inLen, nil, nil + } + + hashLen = hash.Size() + if inLen != hashLen { + return 0, nil, errors.New("crypto/rsa: input must be hashed message") + } + prefix, ok := hashPrefixes[hash] + if !ok { + return 0, nil, errors.New("crypto/rsa: unsupported hash function") + } + return +} + +// copyWithLeftPad copies src to the end of dest, padding with zero bytes as +// needed. +func copyWithLeftPad(dest, src []byte) { + numPaddingBytes := len(dest) - len(src) + for i := 0; i < numPaddingBytes; i++ { + dest[i] = 0 + } + copy(dest[numPaddingBytes:], src) +} diff --git a/vendor/github.com/keybase/go-crypto/rsa/pss.go b/vendor/github.com/keybase/go-crypto/rsa/pss.go new file mode 100644 index 000000000..8a94589b1 --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/rsa/pss.go @@ -0,0 +1,297 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package rsa + +// This file implements the PSS signature scheme [1]. +// +// [1] http://www.rsa.com/rsalabs/pkcs/files/h11300-wp-pkcs-1v2-2-rsa-cryptography-standard.pdf + +import ( + "bytes" + "crypto" + "errors" + "hash" + "io" + "math/big" +) + +func emsaPSSEncode(mHash []byte, emBits int, salt []byte, hash hash.Hash) ([]byte, error) { + // See [1], section 9.1.1 + hLen := hash.Size() + sLen := len(salt) + emLen := (emBits + 7) / 8 + + // 1. If the length of M is greater than the input limitation for the + // hash function (2^61 - 1 octets for SHA-1), output "message too + // long" and stop. + // + // 2. Let mHash = Hash(M), an octet string of length hLen. + + if len(mHash) != hLen { + return nil, errors.New("crypto/rsa: input must be hashed message") + } + + // 3. If emLen < hLen + sLen + 2, output "encoding error" and stop. + + if emLen < hLen+sLen+2 { + return nil, errors.New("crypto/rsa: encoding error") + } + + em := make([]byte, emLen) + db := em[:emLen-sLen-hLen-2+1+sLen] + h := em[emLen-sLen-hLen-2+1+sLen : emLen-1] + + // 4. Generate a random octet string salt of length sLen; if sLen = 0, + // then salt is the empty string. + // + // 5. Let + // M' = (0x)00 00 00 00 00 00 00 00 || mHash || salt; + // + // M' is an octet string of length 8 + hLen + sLen with eight + // initial zero octets. + // + // 6. Let H = Hash(M'), an octet string of length hLen. + + var prefix [8]byte + + hash.Write(prefix[:]) + hash.Write(mHash) + hash.Write(salt) + + h = hash.Sum(h[:0]) + hash.Reset() + + // 7. Generate an octet string PS consisting of emLen - sLen - hLen - 2 + // zero octets. The length of PS may be 0. + // + // 8. Let DB = PS || 0x01 || salt; DB is an octet string of length + // emLen - hLen - 1. + + db[emLen-sLen-hLen-2] = 0x01 + copy(db[emLen-sLen-hLen-1:], salt) + + // 9. Let dbMask = MGF(H, emLen - hLen - 1). + // + // 10. Let maskedDB = DB \xor dbMask. + + mgf1XOR(db, hash, h) + + // 11. Set the leftmost 8 * emLen - emBits bits of the leftmost octet in + // maskedDB to zero. + + db[0] &= (0xFF >> uint(8*emLen-emBits)) + + // 12. Let EM = maskedDB || H || 0xbc. + em[emLen-1] = 0xBC + + // 13. Output EM. + return em, nil +} + +func emsaPSSVerify(mHash, em []byte, emBits, sLen int, hash hash.Hash) error { + // 1. If the length of M is greater than the input limitation for the + // hash function (2^61 - 1 octets for SHA-1), output "inconsistent" + // and stop. + // + // 2. Let mHash = Hash(M), an octet string of length hLen. + hLen := hash.Size() + if hLen != len(mHash) { + return ErrVerification + } + + // 3. If emLen < hLen + sLen + 2, output "inconsistent" and stop. + emLen := (emBits + 7) / 8 + if emLen < hLen+sLen+2 { + return ErrVerification + } + + // 4. If the rightmost octet of EM does not have hexadecimal value + // 0xbc, output "inconsistent" and stop. + if em[len(em)-1] != 0xBC { + return ErrVerification + } + + // 5. Let maskedDB be the leftmost emLen - hLen - 1 octets of EM, and + // let H be the next hLen octets. + db := em[:emLen-hLen-1] + h := em[emLen-hLen-1 : len(em)-1] + + // 6. If the leftmost 8 * emLen - emBits bits of the leftmost octet in + // maskedDB are not all equal to zero, output "inconsistent" and + // stop. + if em[0]&(0xFF<> uint(8*emLen-emBits)) + + if sLen == PSSSaltLengthAuto { + FindSaltLength: + for sLen = emLen - (hLen + 2); sLen >= 0; sLen-- { + switch db[emLen-hLen-sLen-2] { + case 1: + break FindSaltLength + case 0: + continue + default: + return ErrVerification + } + } + if sLen < 0 { + return ErrVerification + } + } else { + // 10. If the emLen - hLen - sLen - 2 leftmost octets of DB are not zero + // or if the octet at position emLen - hLen - sLen - 1 (the leftmost + // position is "position 1") does not have hexadecimal value 0x01, + // output "inconsistent" and stop. + for _, e := range db[:emLen-hLen-sLen-2] { + if e != 0x00 { + return ErrVerification + } + } + if db[emLen-hLen-sLen-2] != 0x01 { + return ErrVerification + } + } + + // 11. Let salt be the last sLen octets of DB. + salt := db[len(db)-sLen:] + + // 12. Let + // M' = (0x)00 00 00 00 00 00 00 00 || mHash || salt ; + // M' is an octet string of length 8 + hLen + sLen with eight + // initial zero octets. + // + // 13. Let H' = Hash(M'), an octet string of length hLen. + var prefix [8]byte + hash.Write(prefix[:]) + hash.Write(mHash) + hash.Write(salt) + + h0 := hash.Sum(nil) + + // 14. If H = H', output "consistent." Otherwise, output "inconsistent." + if !bytes.Equal(h0, h) { + return ErrVerification + } + return nil +} + +// signPSSWithSalt calculates the signature of hashed using PSS [1] with specified salt. +// Note that hashed must be the result of hashing the input message using the +// given hash function. salt is a random sequence of bytes whose length will be +// later used to verify the signature. +func signPSSWithSalt(rand io.Reader, priv *PrivateKey, hash crypto.Hash, hashed, salt []byte) (s []byte, err error) { + nBits := priv.N.BitLen() + em, err := emsaPSSEncode(hashed, nBits-1, salt, hash.New()) + if err != nil { + return + } + m := new(big.Int).SetBytes(em) + c, err := decryptAndCheck(rand, priv, m) + if err != nil { + return + } + s = make([]byte, (nBits+7)/8) + copyWithLeftPad(s, c.Bytes()) + return +} + +const ( + // PSSSaltLengthAuto causes the salt in a PSS signature to be as large + // as possible when signing, and to be auto-detected when verifying. + PSSSaltLengthAuto = 0 + // PSSSaltLengthEqualsHash causes the salt length to equal the length + // of the hash used in the signature. + PSSSaltLengthEqualsHash = -1 +) + +// PSSOptions contains options for creating and verifying PSS signatures. +type PSSOptions struct { + // SaltLength controls the length of the salt used in the PSS + // signature. It can either be a number of bytes, or one of the special + // PSSSaltLength constants. + SaltLength int + + // Hash, if not zero, overrides the hash function passed to SignPSS. + // This is the only way to specify the hash function when using the + // crypto.Signer interface. + Hash crypto.Hash +} + +// HashFunc returns pssOpts.Hash so that PSSOptions implements +// crypto.SignerOpts. +func (pssOpts *PSSOptions) HashFunc() crypto.Hash { + return pssOpts.Hash +} + +func (opts *PSSOptions) saltLength() int { + if opts == nil { + return PSSSaltLengthAuto + } + return opts.SaltLength +} + +// SignPSS calculates the signature of hashed using RSASSA-PSS [1]. +// Note that hashed must be the result of hashing the input message using the +// given hash function. The opts argument may be nil, in which case sensible +// defaults are used. +func SignPSS(rand io.Reader, priv *PrivateKey, hash crypto.Hash, hashed []byte, opts *PSSOptions) (s []byte, err error) { + saltLength := opts.saltLength() + switch saltLength { + case PSSSaltLengthAuto: + saltLength = (priv.N.BitLen()+7)/8 - 2 - hash.Size() + case PSSSaltLengthEqualsHash: + saltLength = hash.Size() + } + + if opts != nil && opts.Hash != 0 { + hash = opts.Hash + } + + salt := make([]byte, saltLength) + if _, err = io.ReadFull(rand, salt); err != nil { + return + } + return signPSSWithSalt(rand, priv, hash, hashed, salt) +} + +// VerifyPSS verifies a PSS signature. +// hashed is the result of hashing the input message using the given hash +// function and sig is the signature. A valid signature is indicated by +// returning a nil error. The opts argument may be nil, in which case sensible +// defaults are used. +func VerifyPSS(pub *PublicKey, hash crypto.Hash, hashed []byte, sig []byte, opts *PSSOptions) error { + return verifyPSS(pub, hash, hashed, sig, opts.saltLength()) +} + +// verifyPSS verifies a PSS signature with the given salt length. +func verifyPSS(pub *PublicKey, hash crypto.Hash, hashed []byte, sig []byte, saltLen int) error { + nBits := pub.N.BitLen() + if len(sig) != (nBits+7)/8 { + return ErrVerification + } + s := new(big.Int).SetBytes(sig) + m := encrypt(new(big.Int), pub, s) + emBits := nBits - 1 + emLen := (emBits + 7) / 8 + if emLen < len(m.Bytes()) { + return ErrVerification + } + em := make([]byte, emLen) + copyWithLeftPad(em, m.Bytes()) + if saltLen == PSSSaltLengthEqualsHash { + saltLen = hash.Size() + } + return emsaPSSVerify(hashed, em, emBits, saltLen, hash.New()) +} diff --git a/vendor/github.com/keybase/go-crypto/rsa/rsa.go b/vendor/github.com/keybase/go-crypto/rsa/rsa.go new file mode 100644 index 000000000..ff6b11b3e --- /dev/null +++ b/vendor/github.com/keybase/go-crypto/rsa/rsa.go @@ -0,0 +1,646 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package rsa implements RSA encryption as specified in PKCS#1. +// +// RSA is a single, fundamental operation that is used in this package to +// implement either public-key encryption or public-key signatures. +// +// The original specification for encryption and signatures with RSA is PKCS#1 +// and the terms "RSA encryption" and "RSA signatures" by default refer to +// PKCS#1 version 1.5. However, that specification has flaws and new designs +// should use version two, usually called by just OAEP and PSS, where +// possible. +// +// Two sets of interfaces are included in this package. When a more abstract +// interface isn't neccessary, there are functions for encrypting/decrypting +// with v1.5/OAEP and signing/verifying with v1.5/PSS. If one needs to abstract +// over the public-key primitive, the PrivateKey struct implements the +// Decrypter and Signer interfaces from the crypto package. +package rsa + +import ( + "crypto" + "crypto/rand" + "crypto/subtle" + "errors" + "hash" + "io" + "math/big" +) + +var bigZero = big.NewInt(0) +var bigOne = big.NewInt(1) + +// A PublicKey represents the public part of an RSA key. +type PublicKey struct { + N *big.Int // modulus + E int64 // public exponent +} + +// OAEPOptions is an interface for passing options to OAEP decryption using the +// crypto.Decrypter interface. +type OAEPOptions struct { + // Hash is the hash function that will be used when generating the mask. + Hash crypto.Hash + // Label is an arbitrary byte string that must be equal to the value + // used when encrypting. + Label []byte +} + +var ( + errPublicModulus = errors.New("crypto/rsa: missing public modulus") + errPublicExponentSmall = errors.New("crypto/rsa: public exponent too small") + errPublicExponentLarge = errors.New("crypto/rsa: public exponent too large") +) + +// checkPub sanity checks the public key before we use it. +// We require pub.E to fit into a 32-bit integer so that we +// do not have different behavior depending on whether +// int is 32 or 64 bits. See also +// http://www.imperialviolet.org/2012/03/16/rsae.html. +func checkPub(pub *PublicKey) error { + if pub.N == nil { + return errPublicModulus + } + if pub.E < 2 { + return errPublicExponentSmall + } + if pub.E > 1<<63-1 { + return errPublicExponentLarge + } + return nil +} + +// A PrivateKey represents an RSA key +type PrivateKey struct { + PublicKey // public part. + D *big.Int // private exponent + Primes []*big.Int // prime factors of N, has >= 2 elements. + + // Precomputed contains precomputed values that speed up private + // operations, if available. + Precomputed PrecomputedValues +} + +// Public returns the public key corresponding to priv. +func (priv *PrivateKey) Public() crypto.PublicKey { + return &priv.PublicKey +} + +// Sign signs msg with priv, reading randomness from rand. If opts is a +// *PSSOptions then the PSS algorithm will be used, otherwise PKCS#1 v1.5 will +// be used. This method is intended to support keys where the private part is +// kept in, for example, a hardware module. Common uses should use the Sign* +// functions in this package. +func (priv *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ([]byte, error) { + if pssOpts, ok := opts.(*PSSOptions); ok { + return SignPSS(rand, priv, pssOpts.Hash, msg, pssOpts) + } + + return SignPKCS1v15(rand, priv, opts.HashFunc(), msg) +} + +// Decrypt decrypts ciphertext with priv. If opts is nil or of type +// *PKCS1v15DecryptOptions then PKCS#1 v1.5 decryption is performed. Otherwise +// opts must have type *OAEPOptions and OAEP decryption is done. +func (priv *PrivateKey) Decrypt(rand io.Reader, ciphertext []byte, opts crypto.DecrypterOpts) (plaintext []byte, err error) { + if opts == nil { + return DecryptPKCS1v15(rand, priv, ciphertext) + } + + switch opts := opts.(type) { + case *OAEPOptions: + return DecryptOAEP(opts.Hash.New(), rand, priv, ciphertext, opts.Label) + + case *PKCS1v15DecryptOptions: + if l := opts.SessionKeyLen; l > 0 { + plaintext = make([]byte, l) + if _, err := io.ReadFull(rand, plaintext); err != nil { + return nil, err + } + if err := DecryptPKCS1v15SessionKey(rand, priv, ciphertext, plaintext); err != nil { + return nil, err + } + return plaintext, nil + } else { + return DecryptPKCS1v15(rand, priv, ciphertext) + } + + default: + return nil, errors.New("crypto/rsa: invalid options for Decrypt") + } +} + +type PrecomputedValues struct { + Dp, Dq *big.Int // D mod (P-1) (or mod Q-1) + Qinv *big.Int // Q^-1 mod P + + // CRTValues is used for the 3rd and subsequent primes. Due to a + // historical accident, the CRT for the first two primes is handled + // differently in PKCS#1 and interoperability is sufficiently + // important that we mirror this. + CRTValues []CRTValue +} + +// CRTValue contains the precomputed Chinese remainder theorem values. +type CRTValue struct { + Exp *big.Int // D mod (prime-1). + Coeff *big.Int // R·Coeff ≡ 1 mod Prime. + R *big.Int // product of primes prior to this (inc p and q). +} + +// Validate performs basic sanity checks on the key. +// It returns nil if the key is valid, or else an error describing a problem. +func (priv *PrivateKey) Validate() error { + if err := checkPub(&priv.PublicKey); err != nil { + return err + } + + // Check that Πprimes == n. + modulus := new(big.Int).Set(bigOne) + for _, prime := range priv.Primes { + // Any primes ≤ 1 will cause divide-by-zero panics later. + if prime.Cmp(bigOne) <= 0 { + return errors.New("crypto/rsa: invalid prime value") + } + modulus.Mul(modulus, prime) + } + if modulus.Cmp(priv.N) != 0 { + return errors.New("crypto/rsa: invalid modulus") + } + + // Check that de ≡ 1 mod p-1, for each prime. + // This implies that e is coprime to each p-1 as e has a multiplicative + // inverse. Therefore e is coprime to lcm(p-1,q-1,r-1,...) = + // exponent(ℤ/nℤ). It also implies that a^de ≡ a mod p as a^(p-1) ≡ 1 + // mod p. Thus a^de ≡ a mod n for all a coprime to n, as required. + congruence := new(big.Int) + de := new(big.Int).SetInt64(int64(priv.E)) + de.Mul(de, priv.D) + for _, prime := range priv.Primes { + pminus1 := new(big.Int).Sub(prime, bigOne) + congruence.Mod(de, pminus1) + if congruence.Cmp(bigOne) != 0 { + return errors.New("crypto/rsa: invalid exponents") + } + } + return nil +} + +// GenerateKey generates an RSA keypair of the given bit size using the +// random source random (for example, crypto/rand.Reader). +func GenerateKey(random io.Reader, bits int) (priv *PrivateKey, err error) { + return GenerateMultiPrimeKey(random, 2, bits) +} + +// GenerateMultiPrimeKey generates a multi-prime RSA keypair of the given bit +// size and the given random source, as suggested in [1]. Although the public +// keys are compatible (actually, indistinguishable) from the 2-prime case, +// the private keys are not. Thus it may not be possible to export multi-prime +// private keys in certain formats or to subsequently import them into other +// code. +// +// Table 1 in [2] suggests maximum numbers of primes for a given size. +// +// [1] US patent 4405829 (1972, expired) +// [2] http://www.cacr.math.uwaterloo.ca/techreports/2006/cacr2006-16.pdf +func GenerateMultiPrimeKey(random io.Reader, nprimes int, bits int) (priv *PrivateKey, err error) { + priv = new(PrivateKey) + priv.E = 65537 + + if nprimes < 2 { + return nil, errors.New("crypto/rsa: GenerateMultiPrimeKey: nprimes must be >= 2") + } + + primes := make([]*big.Int, nprimes) + +NextSetOfPrimes: + for { + todo := bits + // crypto/rand should set the top two bits in each prime. + // Thus each prime has the form + // p_i = 2^bitlen(p_i) × 0.11... (in base 2). + // And the product is: + // P = 2^todo × α + // where α is the product of nprimes numbers of the form 0.11... + // + // If α < 1/2 (which can happen for nprimes > 2), we need to + // shift todo to compensate for lost bits: the mean value of 0.11... + // is 7/8, so todo + shift - nprimes * log2(7/8) ~= bits - 1/2 + // will give good results. + if nprimes >= 7 { + todo += (nprimes - 2) / 5 + } + for i := 0; i < nprimes; i++ { + primes[i], err = rand.Prime(random, todo/(nprimes-i)) + if err != nil { + return nil, err + } + todo -= primes[i].BitLen() + } + + // Make sure that primes is pairwise unequal. + for i, prime := range primes { + for j := 0; j < i; j++ { + if prime.Cmp(primes[j]) == 0 { + continue NextSetOfPrimes + } + } + } + + n := new(big.Int).Set(bigOne) + totient := new(big.Int).Set(bigOne) + pminus1 := new(big.Int) + for _, prime := range primes { + n.Mul(n, prime) + pminus1.Sub(prime, bigOne) + totient.Mul(totient, pminus1) + } + if n.BitLen() != bits { + // This should never happen for nprimes == 2 because + // crypto/rand should set the top two bits in each prime. + // For nprimes > 2 we hope it does not happen often. + continue NextSetOfPrimes + } + + g := new(big.Int) + priv.D = new(big.Int) + y := new(big.Int) + e := big.NewInt(int64(priv.E)) + g.GCD(priv.D, y, e, totient) + + if g.Cmp(bigOne) == 0 { + if priv.D.Sign() < 0 { + priv.D.Add(priv.D, totient) + } + priv.Primes = primes + priv.N = n + + break + } + } + + priv.Precompute() + return +} + +// incCounter increments a four byte, big-endian counter. +func incCounter(c *[4]byte) { + if c[3]++; c[3] != 0 { + return + } + if c[2]++; c[2] != 0 { + return + } + if c[1]++; c[1] != 0 { + return + } + c[0]++ +} + +// mgf1XOR XORs the bytes in out with a mask generated using the MGF1 function +// specified in PKCS#1 v2.1. +func mgf1XOR(out []byte, hash hash.Hash, seed []byte) { + var counter [4]byte + var digest []byte + + done := 0 + for done < len(out) { + hash.Write(seed) + hash.Write(counter[0:4]) + digest = hash.Sum(digest[:0]) + hash.Reset() + + for i := 0; i < len(digest) && done < len(out); i++ { + out[done] ^= digest[i] + done++ + } + incCounter(&counter) + } +} + +// ErrMessageTooLong is returned when attempting to encrypt a message which is +// too large for the size of the public key. +var ErrMessageTooLong = errors.New("crypto/rsa: message too long for RSA public key size") + +func encrypt(c *big.Int, pub *PublicKey, m *big.Int) *big.Int { + e := big.NewInt(int64(pub.E)) + c.Exp(m, e, pub.N) + return c +} + +// EncryptOAEP encrypts the given message with RSA-OAEP. +// +// OAEP is parameterised by a hash function that is used as a random oracle. +// Encryption and decryption of a given message must use the same hash function +// and sha256.New() is a reasonable choice. +// +// The random parameter is used as a source of entropy to ensure that +// encrypting the same message twice doesn't result in the same ciphertext. +// +// The label parameter may contain arbitrary data that will not be encrypted, +// but which gives important context to the message. For example, if a given +// public key is used to decrypt two types of messages then distinct label +// values could be used to ensure that a ciphertext for one purpose cannot be +// used for another by an attacker. If not required it can be empty. +// +// The message must be no longer than the length of the public modulus less +// twice the hash length plus 2. +func EncryptOAEP(hash hash.Hash, random io.Reader, pub *PublicKey, msg []byte, label []byte) (out []byte, err error) { + if err := checkPub(pub); err != nil { + return nil, err + } + hash.Reset() + k := (pub.N.BitLen() + 7) / 8 + if len(msg) > k-2*hash.Size()-2 { + err = ErrMessageTooLong + return + } + + hash.Write(label) + lHash := hash.Sum(nil) + hash.Reset() + + em := make([]byte, k) + seed := em[1 : 1+hash.Size()] + db := em[1+hash.Size():] + + copy(db[0:hash.Size()], lHash) + db[len(db)-len(msg)-1] = 1 + copy(db[len(db)-len(msg):], msg) + + _, err = io.ReadFull(random, seed) + if err != nil { + return + } + + mgf1XOR(db, hash, seed) + mgf1XOR(seed, hash, db) + + m := new(big.Int) + m.SetBytes(em) + c := encrypt(new(big.Int), pub, m) + out = c.Bytes() + + if len(out) < k { + // If the output is too small, we need to left-pad with zeros. + t := make([]byte, k) + copy(t[k-len(out):], out) + out = t + } + + return +} + +// ErrDecryption represents a failure to decrypt a message. +// It is deliberately vague to avoid adaptive attacks. +var ErrDecryption = errors.New("crypto/rsa: decryption error") + +// ErrVerification represents a failure to verify a signature. +// It is deliberately vague to avoid adaptive attacks. +var ErrVerification = errors.New("crypto/rsa: verification error") + +// modInverse returns ia, the inverse of a in the multiplicative group of prime +// order n. It requires that a be a member of the group (i.e. less than n). +func modInverse(a, n *big.Int) (ia *big.Int, ok bool) { + g := new(big.Int) + x := new(big.Int) + y := new(big.Int) + g.GCD(x, y, a, n) + if g.Cmp(bigOne) != 0 { + // In this case, a and n aren't coprime and we cannot calculate + // the inverse. This happens because the values of n are nearly + // prime (being the product of two primes) rather than truly + // prime. + return + } + + if x.Cmp(bigOne) < 0 { + // 0 is not the multiplicative inverse of any element so, if x + // < 1, then x is negative. + x.Add(x, n) + } + + return x, true +} + +// Precompute performs some calculations that speed up private key operations +// in the future. +func (priv *PrivateKey) Precompute() { + if priv.Precomputed.Dp != nil { + return + } + + priv.Precomputed.Dp = new(big.Int).Sub(priv.Primes[0], bigOne) + priv.Precomputed.Dp.Mod(priv.D, priv.Precomputed.Dp) + + priv.Precomputed.Dq = new(big.Int).Sub(priv.Primes[1], bigOne) + priv.Precomputed.Dq.Mod(priv.D, priv.Precomputed.Dq) + + priv.Precomputed.Qinv = new(big.Int).ModInverse(priv.Primes[1], priv.Primes[0]) + + r := new(big.Int).Mul(priv.Primes[0], priv.Primes[1]) + priv.Precomputed.CRTValues = make([]CRTValue, len(priv.Primes)-2) + for i := 2; i < len(priv.Primes); i++ { + prime := priv.Primes[i] + values := &priv.Precomputed.CRTValues[i-2] + + values.Exp = new(big.Int).Sub(prime, bigOne) + values.Exp.Mod(priv.D, values.Exp) + + values.R = new(big.Int).Set(r) + values.Coeff = new(big.Int).ModInverse(r, prime) + + r.Mul(r, prime) + } +} + +// decrypt performs an RSA decryption, resulting in a plaintext integer. If a +// random source is given, RSA blinding is used. +func decrypt(random io.Reader, priv *PrivateKey, c *big.Int) (m *big.Int, err error) { + // TODO(agl): can we get away with reusing blinds? + if c.Cmp(priv.N) > 0 { + err = ErrDecryption + return + } + + var ir *big.Int + if random != nil { + // Blinding enabled. Blinding involves multiplying c by r^e. + // Then the decryption operation performs (m^e * r^e)^d mod n + // which equals mr mod n. The factor of r can then be removed + // by multiplying by the multiplicative inverse of r. + + var r *big.Int + + for { + r, err = rand.Int(random, priv.N) + if err != nil { + return + } + if r.Cmp(bigZero) == 0 { + r = bigOne + } + var ok bool + ir, ok = modInverse(r, priv.N) + if ok { + break + } + } + bigE := big.NewInt(int64(priv.E)) + rpowe := new(big.Int).Exp(r, bigE, priv.N) + cCopy := new(big.Int).Set(c) + cCopy.Mul(cCopy, rpowe) + cCopy.Mod(cCopy, priv.N) + c = cCopy + } + + if priv.Precomputed.Dp == nil { + m = new(big.Int).Exp(c, priv.D, priv.N) + } else { + // We have the precalculated values needed for the CRT. + m = new(big.Int).Exp(c, priv.Precomputed.Dp, priv.Primes[0]) + m2 := new(big.Int).Exp(c, priv.Precomputed.Dq, priv.Primes[1]) + m.Sub(m, m2) + if m.Sign() < 0 { + m.Add(m, priv.Primes[0]) + } + m.Mul(m, priv.Precomputed.Qinv) + m.Mod(m, priv.Primes[0]) + m.Mul(m, priv.Primes[1]) + m.Add(m, m2) + + for i, values := range priv.Precomputed.CRTValues { + prime := priv.Primes[2+i] + m2.Exp(c, values.Exp, prime) + m2.Sub(m2, m) + m2.Mul(m2, values.Coeff) + m2.Mod(m2, prime) + if m2.Sign() < 0 { + m2.Add(m2, prime) + } + m2.Mul(m2, values.R) + m.Add(m, m2) + } + } + + if ir != nil { + // Unblind. + m.Mul(m, ir) + m.Mod(m, priv.N) + } + + return +} + +func decryptAndCheck(random io.Reader, priv *PrivateKey, c *big.Int) (m *big.Int, err error) { + m, err = decrypt(random, priv, c) + if err != nil { + return nil, err + } + + // In order to defend against errors in the CRT computation, m^e is + // calculated, which should match the original ciphertext. + check := encrypt(new(big.Int), &priv.PublicKey, m) + if c.Cmp(check) != 0 { + return nil, errors.New("rsa: internal error") + } + return m, nil +} + +// DecryptOAEP decrypts ciphertext using RSA-OAEP. + +// OAEP is parameterised by a hash function that is used as a random oracle. +// Encryption and decryption of a given message must use the same hash function +// and sha256.New() is a reasonable choice. +// +// The random parameter, if not nil, is used to blind the private-key operation +// and avoid timing side-channel attacks. Blinding is purely internal to this +// function – the random data need not match that used when encrypting. +// +// The label parameter must match the value given when encrypting. See +// EncryptOAEP for details. +func DecryptOAEP(hash hash.Hash, random io.Reader, priv *PrivateKey, ciphertext []byte, label []byte) (msg []byte, err error) { + if err := checkPub(&priv.PublicKey); err != nil { + return nil, err + } + k := (priv.N.BitLen() + 7) / 8 + if len(ciphertext) > k || + k < hash.Size()*2+2 { + err = ErrDecryption + return + } + + c := new(big.Int).SetBytes(ciphertext) + + m, err := decrypt(random, priv, c) + if err != nil { + return + } + + hash.Write(label) + lHash := hash.Sum(nil) + hash.Reset() + + // Converting the plaintext number to bytes will strip any + // leading zeros so we may have to left pad. We do this unconditionally + // to avoid leaking timing information. (Although we still probably + // leak the number of leading zeros. It's not clear that we can do + // anything about this.) + em := leftPad(m.Bytes(), k) + + firstByteIsZero := subtle.ConstantTimeByteEq(em[0], 0) + + seed := em[1 : hash.Size()+1] + db := em[hash.Size()+1:] + + mgf1XOR(seed, hash, db) + mgf1XOR(db, hash, seed) + + lHash2 := db[0:hash.Size()] + + // We have to validate the plaintext in constant time in order to avoid + // attacks like: J. Manger. A Chosen Ciphertext Attack on RSA Optimal + // Asymmetric Encryption Padding (OAEP) as Standardized in PKCS #1 + // v2.0. In J. Kilian, editor, Advances in Cryptology. + lHash2Good := subtle.ConstantTimeCompare(lHash, lHash2) + + // The remainder of the plaintext must be zero or more 0x00, followed + // by 0x01, followed by the message. + // lookingForIndex: 1 iff we are still looking for the 0x01 + // index: the offset of the first 0x01 byte + // invalid: 1 iff we saw a non-zero byte before the 0x01. + var lookingForIndex, index, invalid int + lookingForIndex = 1 + rest := db[hash.Size():] + + for i := 0; i < len(rest); i++ { + equals0 := subtle.ConstantTimeByteEq(rest[i], 0) + equals1 := subtle.ConstantTimeByteEq(rest[i], 1) + index = subtle.ConstantTimeSelect(lookingForIndex&equals1, i, index) + lookingForIndex = subtle.ConstantTimeSelect(equals1, 0, lookingForIndex) + invalid = subtle.ConstantTimeSelect(lookingForIndex&^equals0, 1, invalid) + } + + if firstByteIsZero&lHash2Good&^invalid&^lookingForIndex != 1 { + err = ErrDecryption + return + } + + msg = rest[index+1:] + return +} + +// leftPad returns a new slice of length size. The contents of input are right +// aligned in the new slice. +func leftPad(input []byte, size int) (out []byte) { + n := len(input) + if n > size { + n = size + } + out = make([]byte, size) + copy(out[len(out)-n:], input) + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/keys.go b/vendor/golang.org/x/crypto/openpgp/keys.go deleted file mode 100644 index 68b14c6ae..000000000 --- a/vendor/golang.org/x/crypto/openpgp/keys.go +++ /dev/null @@ -1,637 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package openpgp - -import ( - "crypto/rsa" - "io" - "time" - - "golang.org/x/crypto/openpgp/armor" - "golang.org/x/crypto/openpgp/errors" - "golang.org/x/crypto/openpgp/packet" -) - -// PublicKeyType is the armor type for a PGP public key. -var PublicKeyType = "PGP PUBLIC KEY BLOCK" - -// PrivateKeyType is the armor type for a PGP private key. -var PrivateKeyType = "PGP PRIVATE KEY BLOCK" - -// An Entity represents the components of an OpenPGP key: a primary public key -// (which must be a signing key), one or more identities claimed by that key, -// and zero or more subkeys, which may be encryption keys. -type Entity struct { - PrimaryKey *packet.PublicKey - PrivateKey *packet.PrivateKey - Identities map[string]*Identity // indexed by Identity.Name - Revocations []*packet.Signature - Subkeys []Subkey -} - -// An Identity represents an identity claimed by an Entity and zero or more -// assertions by other entities about that claim. -type Identity struct { - Name string // by convention, has the form "Full Name (comment) " - UserId *packet.UserId - SelfSignature *packet.Signature - Signatures []*packet.Signature -} - -// A Subkey is an additional public key in an Entity. Subkeys can be used for -// encryption. -type Subkey struct { - PublicKey *packet.PublicKey - PrivateKey *packet.PrivateKey - Sig *packet.Signature -} - -// A Key identifies a specific public key in an Entity. This is either the -// Entity's primary key or a subkey. -type Key struct { - Entity *Entity - PublicKey *packet.PublicKey - PrivateKey *packet.PrivateKey - SelfSignature *packet.Signature -} - -// A KeyRing provides access to public and private keys. -type KeyRing interface { - // KeysById returns the set of keys that have the given key id. - KeysById(id uint64) []Key - // KeysByIdAndUsage returns the set of keys with the given id - // that also meet the key usage given by requiredUsage. - // The requiredUsage is expressed as the bitwise-OR of - // packet.KeyFlag* values. - KeysByIdUsage(id uint64, requiredUsage byte) []Key - // DecryptionKeys returns all private keys that are valid for - // decryption. - DecryptionKeys() []Key -} - -// primaryIdentity returns the Identity marked as primary or the first identity -// if none are so marked. -func (e *Entity) primaryIdentity() *Identity { - var firstIdentity *Identity - for _, ident := range e.Identities { - if firstIdentity == nil { - firstIdentity = ident - } - if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId { - return ident - } - } - return firstIdentity -} - -// encryptionKey returns the best candidate Key for encrypting a message to the -// given Entity. -func (e *Entity) encryptionKey(now time.Time) (Key, bool) { - candidateSubkey := -1 - - // Iterate the keys to find the newest key - var maxTime time.Time - for i, subkey := range e.Subkeys { - if subkey.Sig.FlagsValid && - subkey.Sig.FlagEncryptCommunications && - subkey.PublicKey.PubKeyAlgo.CanEncrypt() && - !subkey.Sig.KeyExpired(now) && - (maxTime.IsZero() || subkey.Sig.CreationTime.After(maxTime)) { - candidateSubkey = i - maxTime = subkey.Sig.CreationTime - } - } - - if candidateSubkey != -1 { - subkey := e.Subkeys[candidateSubkey] - return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig}, true - } - - // If we don't have any candidate subkeys for encryption and - // the primary key doesn't have any usage metadata then we - // assume that the primary key is ok. Or, if the primary key is - // marked as ok to encrypt to, then we can obviously use it. - i := e.primaryIdentity() - if !i.SelfSignature.FlagsValid || i.SelfSignature.FlagEncryptCommunications && - e.PrimaryKey.PubKeyAlgo.CanEncrypt() && - !i.SelfSignature.KeyExpired(now) { - return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature}, true - } - - // This Entity appears to be signing only. - return Key{}, false -} - -// signingKey return the best candidate Key for signing a message with this -// Entity. -func (e *Entity) signingKey(now time.Time) (Key, bool) { - candidateSubkey := -1 - - for i, subkey := range e.Subkeys { - if subkey.Sig.FlagsValid && - subkey.Sig.FlagSign && - subkey.PublicKey.PubKeyAlgo.CanSign() && - !subkey.Sig.KeyExpired(now) { - candidateSubkey = i - break - } - } - - if candidateSubkey != -1 { - subkey := e.Subkeys[candidateSubkey] - return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig}, true - } - - // If we have no candidate subkey then we assume that it's ok to sign - // with the primary key. - i := e.primaryIdentity() - if !i.SelfSignature.FlagsValid || i.SelfSignature.FlagSign && - !i.SelfSignature.KeyExpired(now) { - return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature}, true - } - - return Key{}, false -} - -// An EntityList contains one or more Entities. -type EntityList []*Entity - -// KeysById returns the set of keys that have the given key id. -func (el EntityList) KeysById(id uint64) (keys []Key) { - for _, e := range el { - if e.PrimaryKey.KeyId == id { - var selfSig *packet.Signature - for _, ident := range e.Identities { - if selfSig == nil { - selfSig = ident.SelfSignature - } else if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId { - selfSig = ident.SelfSignature - break - } - } - keys = append(keys, Key{e, e.PrimaryKey, e.PrivateKey, selfSig}) - } - - for _, subKey := range e.Subkeys { - if subKey.PublicKey.KeyId == id { - keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig}) - } - } - } - return -} - -// KeysByIdAndUsage returns the set of keys with the given id that also meet -// the key usage given by requiredUsage. The requiredUsage is expressed as -// the bitwise-OR of packet.KeyFlag* values. -func (el EntityList) KeysByIdUsage(id uint64, requiredUsage byte) (keys []Key) { - for _, key := range el.KeysById(id) { - if len(key.Entity.Revocations) > 0 { - continue - } - - if key.SelfSignature.RevocationReason != nil { - continue - } - - if key.SelfSignature.FlagsValid && requiredUsage != 0 { - var usage byte - if key.SelfSignature.FlagCertify { - usage |= packet.KeyFlagCertify - } - if key.SelfSignature.FlagSign { - usage |= packet.KeyFlagSign - } - if key.SelfSignature.FlagEncryptCommunications { - usage |= packet.KeyFlagEncryptCommunications - } - if key.SelfSignature.FlagEncryptStorage { - usage |= packet.KeyFlagEncryptStorage - } - if usage&requiredUsage != requiredUsage { - continue - } - } - - keys = append(keys, key) - } - return -} - -// DecryptionKeys returns all private keys that are valid for decryption. -func (el EntityList) DecryptionKeys() (keys []Key) { - for _, e := range el { - for _, subKey := range e.Subkeys { - if subKey.PrivateKey != nil && (!subKey.Sig.FlagsValid || subKey.Sig.FlagEncryptStorage || subKey.Sig.FlagEncryptCommunications) { - keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig}) - } - } - } - return -} - -// ReadArmoredKeyRing reads one or more public/private keys from an armor keyring file. -func ReadArmoredKeyRing(r io.Reader) (EntityList, error) { - block, err := armor.Decode(r) - if err == io.EOF { - return nil, errors.InvalidArgumentError("no armored data found") - } - if err != nil { - return nil, err - } - if block.Type != PublicKeyType && block.Type != PrivateKeyType { - return nil, errors.InvalidArgumentError("expected public or private key block, got: " + block.Type) - } - - return ReadKeyRing(block.Body) -} - -// ReadKeyRing reads one or more public/private keys. Unsupported keys are -// ignored as long as at least a single valid key is found. -func ReadKeyRing(r io.Reader) (el EntityList, err error) { - packets := packet.NewReader(r) - var lastUnsupportedError error - - for { - var e *Entity - e, err = ReadEntity(packets) - if err != nil { - // TODO: warn about skipped unsupported/unreadable keys - if _, ok := err.(errors.UnsupportedError); ok { - lastUnsupportedError = err - err = readToNextPublicKey(packets) - } else if _, ok := err.(errors.StructuralError); ok { - // Skip unreadable, badly-formatted keys - lastUnsupportedError = err - err = readToNextPublicKey(packets) - } - if err == io.EOF { - err = nil - break - } - if err != nil { - el = nil - break - } - } else { - el = append(el, e) - } - } - - if len(el) == 0 && err == nil { - err = lastUnsupportedError - } - return -} - -// readToNextPublicKey reads packets until the start of the entity and leaves -// the first packet of the new entity in the Reader. -func readToNextPublicKey(packets *packet.Reader) (err error) { - var p packet.Packet - for { - p, err = packets.Next() - if err == io.EOF { - return - } else if err != nil { - if _, ok := err.(errors.UnsupportedError); ok { - err = nil - continue - } - return - } - - if pk, ok := p.(*packet.PublicKey); ok && !pk.IsSubkey { - packets.Unread(p) - return - } - } -} - -// ReadEntity reads an entity (public key, identities, subkeys etc) from the -// given Reader. -func ReadEntity(packets *packet.Reader) (*Entity, error) { - e := new(Entity) - e.Identities = make(map[string]*Identity) - - p, err := packets.Next() - if err != nil { - return nil, err - } - - var ok bool - if e.PrimaryKey, ok = p.(*packet.PublicKey); !ok { - if e.PrivateKey, ok = p.(*packet.PrivateKey); !ok { - packets.Unread(p) - return nil, errors.StructuralError("first packet was not a public/private key") - } else { - e.PrimaryKey = &e.PrivateKey.PublicKey - } - } - - if !e.PrimaryKey.PubKeyAlgo.CanSign() { - return nil, errors.StructuralError("primary key cannot be used for signatures") - } - - var current *Identity - var revocations []*packet.Signature -EachPacket: - for { - p, err := packets.Next() - if err == io.EOF { - break - } else if err != nil { - return nil, err - } - - switch pkt := p.(type) { - case *packet.UserId: - current = new(Identity) - current.Name = pkt.Id - current.UserId = pkt - e.Identities[pkt.Id] = current - - for { - p, err = packets.Next() - if err == io.EOF { - return nil, io.ErrUnexpectedEOF - } else if err != nil { - return nil, err - } - - sig, ok := p.(*packet.Signature) - if !ok { - return nil, errors.StructuralError("user ID packet not followed by self-signature") - } - - if (sig.SigType == packet.SigTypePositiveCert || sig.SigType == packet.SigTypeGenericCert) && sig.IssuerKeyId != nil && *sig.IssuerKeyId == e.PrimaryKey.KeyId { - if err = e.PrimaryKey.VerifyUserIdSignature(pkt.Id, e.PrimaryKey, sig); err != nil { - return nil, errors.StructuralError("user ID self-signature invalid: " + err.Error()) - } - current.SelfSignature = sig - break - } - current.Signatures = append(current.Signatures, sig) - } - case *packet.Signature: - if pkt.SigType == packet.SigTypeKeyRevocation { - revocations = append(revocations, pkt) - } else if pkt.SigType == packet.SigTypeDirectSignature { - // TODO: RFC4880 5.2.1 permits signatures - // directly on keys (eg. to bind additional - // revocation keys). - } else if current == nil { - return nil, errors.StructuralError("signature packet found before user id packet") - } else { - current.Signatures = append(current.Signatures, pkt) - } - case *packet.PrivateKey: - if pkt.IsSubkey == false { - packets.Unread(p) - break EachPacket - } - err = addSubkey(e, packets, &pkt.PublicKey, pkt) - if err != nil { - return nil, err - } - case *packet.PublicKey: - if pkt.IsSubkey == false { - packets.Unread(p) - break EachPacket - } - err = addSubkey(e, packets, pkt, nil) - if err != nil { - return nil, err - } - default: - // we ignore unknown packets - } - } - - if len(e.Identities) == 0 { - return nil, errors.StructuralError("entity without any identities") - } - - for _, revocation := range revocations { - err = e.PrimaryKey.VerifyRevocationSignature(revocation) - if err == nil { - e.Revocations = append(e.Revocations, revocation) - } else { - // TODO: RFC 4880 5.2.3.15 defines revocation keys. - return nil, errors.StructuralError("revocation signature signed by alternate key") - } - } - - return e, nil -} - -func addSubkey(e *Entity, packets *packet.Reader, pub *packet.PublicKey, priv *packet.PrivateKey) error { - var subKey Subkey - subKey.PublicKey = pub - subKey.PrivateKey = priv - p, err := packets.Next() - if err == io.EOF { - return io.ErrUnexpectedEOF - } - if err != nil { - return errors.StructuralError("subkey signature invalid: " + err.Error()) - } - var ok bool - subKey.Sig, ok = p.(*packet.Signature) - if !ok { - return errors.StructuralError("subkey packet not followed by signature") - } - if subKey.Sig.SigType != packet.SigTypeSubkeyBinding && subKey.Sig.SigType != packet.SigTypeSubkeyRevocation { - return errors.StructuralError("subkey signature with wrong type") - } - err = e.PrimaryKey.VerifyKeySignature(subKey.PublicKey, subKey.Sig) - if err != nil { - return errors.StructuralError("subkey signature invalid: " + err.Error()) - } - e.Subkeys = append(e.Subkeys, subKey) - return nil -} - -const defaultRSAKeyBits = 2048 - -// NewEntity returns an Entity that contains a fresh RSA/RSA keypair with a -// single identity composed of the given full name, comment and email, any of -// which may be empty but must not contain any of "()<>\x00". -// If config is nil, sensible defaults will be used. -func NewEntity(name, comment, email string, config *packet.Config) (*Entity, error) { - currentTime := config.Now() - - bits := defaultRSAKeyBits - if config != nil && config.RSABits != 0 { - bits = config.RSABits - } - - uid := packet.NewUserId(name, comment, email) - if uid == nil { - return nil, errors.InvalidArgumentError("user id field contained invalid characters") - } - signingPriv, err := rsa.GenerateKey(config.Random(), bits) - if err != nil { - return nil, err - } - encryptingPriv, err := rsa.GenerateKey(config.Random(), bits) - if err != nil { - return nil, err - } - - e := &Entity{ - PrimaryKey: packet.NewRSAPublicKey(currentTime, &signingPriv.PublicKey), - PrivateKey: packet.NewRSAPrivateKey(currentTime, signingPriv), - Identities: make(map[string]*Identity), - } - isPrimaryId := true - e.Identities[uid.Id] = &Identity{ - Name: uid.Name, - UserId: uid, - SelfSignature: &packet.Signature{ - CreationTime: currentTime, - SigType: packet.SigTypePositiveCert, - PubKeyAlgo: packet.PubKeyAlgoRSA, - Hash: config.Hash(), - IsPrimaryId: &isPrimaryId, - FlagsValid: true, - FlagSign: true, - FlagCertify: true, - IssuerKeyId: &e.PrimaryKey.KeyId, - }, - } - - // If the user passes in a DefaultHash via packet.Config, - // set the PreferredHash for the SelfSignature. - if config != nil && config.DefaultHash != 0 { - e.Identities[uid.Id].SelfSignature.PreferredHash = []uint8{hashToHashId(config.DefaultHash)} - } - - e.Subkeys = make([]Subkey, 1) - e.Subkeys[0] = Subkey{ - PublicKey: packet.NewRSAPublicKey(currentTime, &encryptingPriv.PublicKey), - PrivateKey: packet.NewRSAPrivateKey(currentTime, encryptingPriv), - Sig: &packet.Signature{ - CreationTime: currentTime, - SigType: packet.SigTypeSubkeyBinding, - PubKeyAlgo: packet.PubKeyAlgoRSA, - Hash: config.Hash(), - FlagsValid: true, - FlagEncryptStorage: true, - FlagEncryptCommunications: true, - IssuerKeyId: &e.PrimaryKey.KeyId, - }, - } - e.Subkeys[0].PublicKey.IsSubkey = true - e.Subkeys[0].PrivateKey.IsSubkey = true - - return e, nil -} - -// SerializePrivate serializes an Entity, including private key material, to -// the given Writer. For now, it must only be used on an Entity returned from -// NewEntity. -// If config is nil, sensible defaults will be used. -func (e *Entity) SerializePrivate(w io.Writer, config *packet.Config) (err error) { - err = e.PrivateKey.Serialize(w) - if err != nil { - return - } - for _, ident := range e.Identities { - err = ident.UserId.Serialize(w) - if err != nil { - return - } - err = ident.SelfSignature.SignUserId(ident.UserId.Id, e.PrimaryKey, e.PrivateKey, config) - if err != nil { - return - } - err = ident.SelfSignature.Serialize(w) - if err != nil { - return - } - } - for _, subkey := range e.Subkeys { - err = subkey.PrivateKey.Serialize(w) - if err != nil { - return - } - err = subkey.Sig.SignKey(subkey.PublicKey, e.PrivateKey, config) - if err != nil { - return - } - err = subkey.Sig.Serialize(w) - if err != nil { - return - } - } - return nil -} - -// Serialize writes the public part of the given Entity to w. (No private -// key material will be output). -func (e *Entity) Serialize(w io.Writer) error { - err := e.PrimaryKey.Serialize(w) - if err != nil { - return err - } - for _, ident := range e.Identities { - err = ident.UserId.Serialize(w) - if err != nil { - return err - } - err = ident.SelfSignature.Serialize(w) - if err != nil { - return err - } - for _, sig := range ident.Signatures { - err = sig.Serialize(w) - if err != nil { - return err - } - } - } - for _, subkey := range e.Subkeys { - err = subkey.PublicKey.Serialize(w) - if err != nil { - return err - } - err = subkey.Sig.Serialize(w) - if err != nil { - return err - } - } - return nil -} - -// SignIdentity adds a signature to e, from signer, attesting that identity is -// associated with e. The provided identity must already be an element of -// e.Identities and the private key of signer must have been decrypted if -// necessary. -// If config is nil, sensible defaults will be used. -func (e *Entity) SignIdentity(identity string, signer *Entity, config *packet.Config) error { - if signer.PrivateKey == nil { - return errors.InvalidArgumentError("signing Entity must have a private key") - } - if signer.PrivateKey.Encrypted { - return errors.InvalidArgumentError("signing Entity's private key must be decrypted") - } - ident, ok := e.Identities[identity] - if !ok { - return errors.InvalidArgumentError("given identity string not found in Entity") - } - - sig := &packet.Signature{ - SigType: packet.SigTypeGenericCert, - PubKeyAlgo: signer.PrivateKey.PubKeyAlgo, - Hash: config.Hash(), - CreationTime: config.Now(), - IssuerKeyId: &signer.PrivateKey.KeyId, - } - if err := sig.SignUserId(identity, e.PrimaryKey, signer.PrivateKey, config); err != nil { - return err - } - ident.Signatures = append(ident.Signatures, sig) - return nil -} diff --git a/vendor/vendor.json b/vendor/vendor.json index b00764c00..c0fb41870 100644 --- a/vendor/vendor.json +++ b/vendor/vendor.json @@ -515,6 +515,84 @@ "revision": "b2c7a7da5b2995941048f60146e67702a292e468", "revisionTime": "2016-02-12T04:00:40Z" }, + { + "checksumSHA1": "VJk3rOWfxEV9Ilig5lgzH1qg8Ss=", + "path": "github.com/keybase/go-crypto/brainpool", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "rnRjEJs5luF+DIXp2J6LFcQk8Gg=", + "path": "github.com/keybase/go-crypto/cast5", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "F5++ZQS5Vt7hd6lxPCKTffvph1A=", + "path": "github.com/keybase/go-crypto/curve25519", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "IvrDXwIixB5yPPbo6tq1/1cSn78=", + "path": "github.com/keybase/go-crypto/ed25519", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "4+fslB6pCbplNq4viy6CrOkkY6Y=", + "path": "github.com/keybase/go-crypto/ed25519/internal/edwards25519", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "fgFlkfkaotUjBVhJik2979oCeJw=", + "path": "github.com/keybase/go-crypto/openpgp", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "+spfcEChljh3yeIg4K/xHOQ2pVM=", + "path": "github.com/keybase/go-crypto/openpgp/armor", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "nWhmwjBJqPSvkCWqaap2Z9EiS1k=", + "path": "github.com/keybase/go-crypto/openpgp/ecdh", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "uxXG9IC/XF8jwwvZUbW65+x8/+M=", + "path": "github.com/keybase/go-crypto/openpgp/elgamal", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "EyUf82Yknzc75m8RcA21CNQINw0=", + "path": "github.com/keybase/go-crypto/openpgp/errors", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "y16ATKgHL/k6rQZqdXP1sIAJxE0=", + "path": "github.com/keybase/go-crypto/openpgp/packet", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "BGDxg1Xtsz0DSPzdQGJLLQqfYc8=", + "path": "github.com/keybase/go-crypto/openpgp/s2k", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, + { + "checksumSHA1": "rE3pp7b3gfcmBregzpIvN5IdFhY=", + "path": "github.com/keybase/go-crypto/rsa", + "revision": "00ac4db533f63ef97576cbc7b07939ff7daf7329", + "revisionTime": "2017-06-05T14:56:57Z" + }, { "checksumSHA1": "fh+CcgeUUsnuwSORHYWg0ycbp+4=", "path": "github.com/klauspost/compress/flate", @@ -1182,12 +1260,6 @@ "revision": "2c050d2dae5345c417db301f11fda6fbf5ad0f0a", "revisionTime": "2016-09-14T08:04:27Z" }, - { - "checksumSHA1": "TT1rac6kpQp2vz24m5yDGUNQ/QQ=", - "path": "golang.org/x/crypto/cast5", - "revision": "b8a2a83acfe6e6770b75de42d5ff4c67596675c0", - "revisionTime": "2017-01-13T19:21:00Z" - }, { "checksumSHA1": "dwOedwBJ1EIK9+S3t108Bx054Y8=", "path": "golang.org/x/crypto/curve25519", @@ -1212,42 +1284,6 @@ "revision": "ede567c8e044a5913dad1d1af3696d9da953104c", "revisionTime": "2016-11-04T19:41:44Z" }, - { - "checksumSHA1": "IIhFTrLlmlc6lEFSitqi4aw2lw0=", - "path": "golang.org/x/crypto/openpgp", - "revision": "b8a2a83acfe6e6770b75de42d5ff4c67596675c0", - "revisionTime": "2017-01-13T19:21:00Z" - }, - { - "checksumSHA1": "olOKkhrdkYQHZ0lf1orrFQPQrv4=", - "path": "golang.org/x/crypto/openpgp/armor", - "revision": "b8a2a83acfe6e6770b75de42d5ff4c67596675c0", - "revisionTime": "2017-01-13T19:21:00Z" - }, - { - "checksumSHA1": "eo/KtdjieJQXH7Qy+faXFcF70ME=", - "path": "golang.org/x/crypto/openpgp/elgamal", - "revision": "b8a2a83acfe6e6770b75de42d5ff4c67596675c0", - "revisionTime": "2017-01-13T19:21:00Z" - }, - { - "checksumSHA1": "rlxVSaGgqdAgwblsErxTxIfuGfg=", - "path": "golang.org/x/crypto/openpgp/errors", - "revision": "b8a2a83acfe6e6770b75de42d5ff4c67596675c0", - "revisionTime": "2017-01-13T19:21:00Z" - }, - { - "checksumSHA1": "LWdaR8Q9yn6eBCcnGl0HvJRDUBE=", - "path": "golang.org/x/crypto/openpgp/packet", - "revision": "b8a2a83acfe6e6770b75de42d5ff4c67596675c0", - "revisionTime": "2017-01-13T19:21:00Z" - }, - { - "checksumSHA1": "s2qT4UwvzBSkzXuiuMkowif1Olw=", - "path": "golang.org/x/crypto/openpgp/s2k", - "revision": "b8a2a83acfe6e6770b75de42d5ff4c67596675c0", - "revisionTime": "2017-01-13T19:21:00Z" - }, { "checksumSHA1": "1MGpGDQqnUoRpv7VEcQrXOBydXE=", "path": "golang.org/x/crypto/pbkdf2",