403 lines
9.8 KiB
JavaScript
403 lines
9.8 KiB
JavaScript
// Copyright 2018-present AJ ONeal. All rights reserved
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
(function(exports) {
|
|
'use strict';
|
|
/*global Promise*/
|
|
|
|
var ASN1 = exports.ASN1;
|
|
var Enc = exports.Enc;
|
|
var PEM = exports.PEM;
|
|
var X509 = exports.x509;
|
|
var Keypairs = exports.Keypairs;
|
|
|
|
// TODO find a way that the prior node-ish way of `module.exports = function () {}` isn't broken
|
|
var CSR = (exports.CSR = function(opts) {
|
|
// We're using a Promise here to be compatible with the browser version
|
|
// which will probably use the webcrypto API for some of the conversions
|
|
return CSR._prepare(opts).then(function(opts) {
|
|
return CSR.create(opts).then(function(bytes) {
|
|
return CSR._encode(opts, bytes);
|
|
});
|
|
});
|
|
});
|
|
|
|
CSR._prepare = function(opts) {
|
|
return Promise.resolve().then(function() {
|
|
var Keypairs;
|
|
opts = JSON.parse(JSON.stringify(opts));
|
|
|
|
// We do a bit of extra error checking for user convenience
|
|
if (!opts) {
|
|
throw new Error(
|
|
'You must pass options with key and domains to rsacsr'
|
|
);
|
|
}
|
|
if (!Array.isArray(opts.domains) || 0 === opts.domains.length) {
|
|
new Error('You must pass options.domains as a non-empty array');
|
|
}
|
|
|
|
// I need to check that 例.中国 is a valid domain name
|
|
if (
|
|
!opts.domains.every(function(d) {
|
|
// allow punycode? xn--
|
|
if (
|
|
'string' ===
|
|
typeof d /*&& /\./.test(d) && !/--/.test(d)*/
|
|
) {
|
|
return true;
|
|
}
|
|
})
|
|
) {
|
|
throw new Error('You must pass options.domains as strings');
|
|
}
|
|
|
|
if (opts.jwk) {
|
|
return opts;
|
|
}
|
|
if (opts.key && opts.key.kty) {
|
|
opts.jwk = opts.key;
|
|
return opts;
|
|
}
|
|
if (!opts.pem && !opts.key) {
|
|
throw new Error('You must pass options.key as a JSON web key');
|
|
}
|
|
|
|
Keypairs = exports.Keypairs;
|
|
if (!exports.Keypairs) {
|
|
throw new Error(
|
|
'Keypairs.js is an optional dependency for PEM-to-JWK.\n' +
|
|
"Install it if you'd like to use it:\n" +
|
|
'\tnpm install --save rasha\n' +
|
|
'Otherwise supply a jwk as the private key.'
|
|
);
|
|
}
|
|
|
|
return Keypairs.import({ pem: opts.pem || opts.key }).then(function(
|
|
pair
|
|
) {
|
|
opts.jwk = pair.private;
|
|
return opts;
|
|
});
|
|
});
|
|
};
|
|
|
|
CSR._encode = function(opts, bytes) {
|
|
if ('der' === (opts.encoding || '').toLowerCase()) {
|
|
return bytes;
|
|
}
|
|
return PEM.packBlock({
|
|
type: 'CERTIFICATE REQUEST',
|
|
bytes: bytes /* { jwk: jwk, domains: opts.domains } */
|
|
});
|
|
};
|
|
|
|
CSR.create = function createCsr(opts) {
|
|
var hex = CSR.request(opts.jwk, opts.domains);
|
|
return CSR._sign(opts.jwk, hex).then(function(csr) {
|
|
return Enc.hexToBuf(csr);
|
|
});
|
|
};
|
|
|
|
//
|
|
// EC / RSA
|
|
//
|
|
CSR.request = function createCsrBodyEc(jwk, domains) {
|
|
var asn1pub;
|
|
if (/^EC/i.test(jwk.kty)) {
|
|
asn1pub = X509.packCsrEcPublicKey(jwk);
|
|
} else {
|
|
asn1pub = X509.packCsrRsaPublicKey(jwk);
|
|
}
|
|
return X509.packCsr(asn1pub, domains);
|
|
};
|
|
|
|
CSR._sign = function csrEcSig(jwk, request) {
|
|
// Took some tips from https://gist.github.com/codermapuche/da4f96cdb6d5ff53b7ebc156ec46a10a
|
|
// TODO will have to convert web ECDSA signatures to PEM ECDSA signatures (but RSA should be the same)
|
|
// TODO have a consistent non-private way to sign
|
|
return Keypairs._sign(
|
|
{ jwk: jwk, format: 'x509' },
|
|
Enc.hexToBuf(request)
|
|
).then(function(sig) {
|
|
return CSR._toDer({
|
|
request: request,
|
|
signature: sig,
|
|
kty: jwk.kty
|
|
});
|
|
});
|
|
};
|
|
|
|
CSR._toDer = function encode(opts) {
|
|
var sty;
|
|
if (/^EC/i.test(opts.kty)) {
|
|
// 1.2.840.10045.4.3.2 ecdsaWithSHA256 (ANSI X9.62 ECDSA algorithm with SHA256)
|
|
sty = ASN1('30', ASN1('06', '2a8648ce3d040302'));
|
|
} else {
|
|
// 1.2.840.113549.1.1.11 sha256WithRSAEncryption (PKCS #1)
|
|
sty = ASN1('30', ASN1('06', '2a864886f70d01010b'), ASN1('05'));
|
|
}
|
|
return ASN1(
|
|
'30',
|
|
// The Full CSR Request Body
|
|
opts.request,
|
|
// The Signature Type
|
|
sty,
|
|
// The Signature
|
|
ASN1.BitStr(Enc.bufToHex(opts.signature))
|
|
);
|
|
};
|
|
|
|
X509.packCsr = function(asn1pubkey, domains) {
|
|
return ASN1(
|
|
'30',
|
|
// Version (0)
|
|
ASN1.UInt('00'),
|
|
|
|
// 2.5.4.3 commonName (X.520 DN component)
|
|
ASN1(
|
|
'30',
|
|
ASN1(
|
|
'31',
|
|
ASN1(
|
|
'30',
|
|
ASN1('06', '550403'),
|
|
ASN1('0c', Enc.utf8ToHex(domains[0]))
|
|
)
|
|
)
|
|
),
|
|
|
|
// Public Key (RSA or EC)
|
|
asn1pubkey,
|
|
|
|
// Request Body
|
|
ASN1(
|
|
'a0',
|
|
ASN1(
|
|
'30',
|
|
// 1.2.840.113549.1.9.14 extensionRequest (PKCS #9 via CRMF)
|
|
ASN1('06', '2a864886f70d01090e'),
|
|
ASN1(
|
|
'31',
|
|
ASN1(
|
|
'30',
|
|
ASN1(
|
|
'30',
|
|
// 2.5.29.17 subjectAltName (X.509 extension)
|
|
ASN1('06', '551d11'),
|
|
ASN1(
|
|
'04',
|
|
ASN1(
|
|
'30',
|
|
domains
|
|
.map(function(d) {
|
|
return ASN1(
|
|
'82',
|
|
Enc.utf8ToHex(d)
|
|
);
|
|
})
|
|
.join('')
|
|
)
|
|
)
|
|
)
|
|
)
|
|
)
|
|
)
|
|
)
|
|
);
|
|
};
|
|
|
|
// TODO finish this later
|
|
// we want to parse the domains, the public key, and verify the signature
|
|
CSR._info = function(der) {
|
|
// standard base64 PEM
|
|
if ('string' === typeof der && '-' === der[0]) {
|
|
der = PEM.parseBlock(der).bytes;
|
|
}
|
|
// jose urlBase64 not-PEM
|
|
if ('string' === typeof der) {
|
|
der = Enc.base64ToBuf(der);
|
|
}
|
|
// not supporting binary-encoded bas64
|
|
var c = ASN1.parse(der);
|
|
var kty;
|
|
// A cert has 3 parts: cert, signature meta, signature
|
|
if (c.children.length !== 3) {
|
|
throw new Error(
|
|
"doesn't look like a certificate request: expected 3 parts of header"
|
|
);
|
|
}
|
|
var sig = c.children[2];
|
|
if (sig.children.length) {
|
|
// ASN1/X509 EC
|
|
sig = sig.children[0];
|
|
sig = ASN1(
|
|
'30',
|
|
ASN1.UInt(Enc.bufToHex(sig.children[0].value)),
|
|
ASN1.UInt(Enc.bufToHex(sig.children[1].value))
|
|
);
|
|
sig = Enc.hexToBuf(sig);
|
|
kty = 'EC';
|
|
} else {
|
|
// Raw RSA Sig
|
|
sig = sig.value;
|
|
kty = 'RSA';
|
|
}
|
|
//c.children[1]; // signature type
|
|
var req = c.children[0];
|
|
// TODO utf8
|
|
if (4 !== req.children.length) {
|
|
throw new Error(
|
|
"doesn't look like a certificate request: expected 4 parts to request"
|
|
);
|
|
}
|
|
// 0 null
|
|
// 1 commonName / subject
|
|
var sub = Enc.bufToBin(
|
|
req.children[1].children[0].children[0].children[1].value
|
|
);
|
|
// 3 public key (type, key)
|
|
//console.log('oid', Enc.bufToHex(req.children[2].children[0].children[0].value));
|
|
var pub;
|
|
// TODO reuse ASN1 parser for these?
|
|
if ('EC' === kty) {
|
|
// throw away compression byte
|
|
pub = req.children[2].children[1].value.slice(1);
|
|
pub = { kty: kty, x: pub.slice(0, 32), y: pub.slice(32) };
|
|
while (0 === pub.x[0]) {
|
|
pub.x = pub.x.slice(1);
|
|
}
|
|
while (0 === pub.y[0]) {
|
|
pub.y = pub.y.slice(1);
|
|
}
|
|
if ((pub.x.length || pub.x.byteLength) > 48) {
|
|
pub.crv = 'P-521';
|
|
} else if ((pub.x.length || pub.x.byteLength) > 32) {
|
|
pub.crv = 'P-384';
|
|
} else {
|
|
pub.crv = 'P-256';
|
|
}
|
|
pub.x = Enc.bufToUrlBase64(pub.x);
|
|
pub.y = Enc.bufToUrlBase64(pub.y);
|
|
} else {
|
|
pub = req.children[2].children[1].children[0];
|
|
pub = {
|
|
kty: kty,
|
|
n: pub.children[0].value,
|
|
e: pub.children[1].value
|
|
};
|
|
while (0 === pub.n[0]) {
|
|
pub.n = pub.n.slice(1);
|
|
}
|
|
while (0 === pub.e[0]) {
|
|
pub.e = pub.e.slice(1);
|
|
}
|
|
pub.n = Enc.bufToUrlBase64(pub.n);
|
|
pub.e = Enc.bufToUrlBase64(pub.e);
|
|
}
|
|
// 4 extensions
|
|
var domains = req.children[3].children
|
|
.filter(function(seq) {
|
|
// 1.2.840.113549.1.9.14 extensionRequest (PKCS #9 via CRMF)
|
|
if (
|
|
'2a864886f70d01090e' === Enc.bufToHex(seq.children[0].value)
|
|
) {
|
|
return true;
|
|
}
|
|
})
|
|
.map(function(seq) {
|
|
return seq.children[1].children[0].children
|
|
.filter(function(seq2) {
|
|
// subjectAltName (X.509 extension)
|
|
if ('551d11' === Enc.bufToHex(seq2.children[0].value)) {
|
|
return true;
|
|
}
|
|
})
|
|
.map(function(seq2) {
|
|
return seq2.children[1].children[0].children.map(
|
|
function(name) {
|
|
// TODO utf8
|
|
return Enc.bufToBin(name.value);
|
|
}
|
|
);
|
|
})[0];
|
|
})[0];
|
|
|
|
return {
|
|
subject: sub,
|
|
altnames: domains,
|
|
jwk: pub,
|
|
signature: sig
|
|
};
|
|
};
|
|
|
|
X509.packCsrRsaPublicKey = function(jwk) {
|
|
// Sequence the key
|
|
var n = ASN1.UInt(Enc.base64ToHex(jwk.n));
|
|
var e = ASN1.UInt(Enc.base64ToHex(jwk.e));
|
|
var asn1pub = ASN1('30', n, e);
|
|
|
|
// Add the CSR pub key header
|
|
return ASN1(
|
|
'30',
|
|
ASN1('30', ASN1('06', '2a864886f70d010101'), ASN1('05')),
|
|
ASN1.BitStr(asn1pub)
|
|
);
|
|
};
|
|
|
|
X509.packCsrEcPublicKey = function(jwk) {
|
|
var ecOid = X509._oids[jwk.crv];
|
|
if (!ecOid) {
|
|
throw new Error(
|
|
"Unsupported namedCurve '" +
|
|
jwk.crv +
|
|
"'. Supported types are " +
|
|
Object.keys(X509._oids)
|
|
);
|
|
}
|
|
var cmp = '04'; // 04 == x+y, 02 == x-only
|
|
var hxy = '';
|
|
// Placeholder. I'm not even sure if compression should be supported.
|
|
if (!jwk.y) {
|
|
cmp = '02';
|
|
}
|
|
hxy += Enc.base64ToHex(jwk.x);
|
|
if (jwk.y) {
|
|
hxy += Enc.base64ToHex(jwk.y);
|
|
}
|
|
|
|
// 1.2.840.10045.2.1 ecPublicKey
|
|
return ASN1(
|
|
'30',
|
|
ASN1('30', ASN1('06', '2a8648ce3d0201'), ASN1('06', ecOid)),
|
|
ASN1.BitStr(cmp + hxy)
|
|
);
|
|
};
|
|
X509._oids = {
|
|
// 1.2.840.10045.3.1.7 prime256v1
|
|
// (ANSI X9.62 named elliptic curve) (06 08 - 2A 86 48 CE 3D 03 01 07)
|
|
'P-256': '2a8648ce3d030107',
|
|
// 1.3.132.0.34 P-384 (06 05 - 2B 81 04 00 22)
|
|
// (SEC 2 recommended EC domain secp256r1)
|
|
'P-384': '2b81040022'
|
|
// requires more logic and isn't a recommended standard
|
|
// 1.3.132.0.35 P-521 (06 05 - 2B 81 04 00 23)
|
|
// (SEC 2 alternate P-521)
|
|
//, 'P-521': '2B 81 04 00 23'
|
|
};
|
|
|
|
// don't replace the full parseBlock, if it exists
|
|
PEM.parseBlock =
|
|
PEM.parseBlock ||
|
|
function(str) {
|
|
var der = str
|
|
.split(/\n/)
|
|
.filter(function(line) {
|
|
return !/-----/.test(line);
|
|
})
|
|
.join('');
|
|
return { bytes: Enc.base64ToBuf(der) };
|
|
};
|
|
})('undefined' === typeof window ? module.exports : window);
|