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rasha.js
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v1.3.0: integrate node v6 support (rsa-compat backport)

This commit is contained in:
AJ ONeal 2019-05-14 03:54:27 -06:00
parent adc8eaec85
commit 1c67c47131
9 changed files with 276 additions and 46 deletions
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2
index.js
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@ -1,2 +1,2 @@
'use strict';
module.exports = require('./lib/rasha.js');
module.exports = require('./lib/rsa.js');

51
lib/crypto.js Normal file
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@ -0,0 +1,51 @@
'use strict';
/*global Promise*/
var PEM = require('./pem.js');
var x509 = require('./x509.js');
var ASN1 = require('./asn1.js');
// Hacky-do, wrappy-do
module.exports.generate = function (opts) {
if (!opts) { opts = {}; }
return new Promise(function (resolve, reject) {
try {
var modlen = opts.modulusLength || 2048;
var exp = opts.publicExponent || 0x10001;
var pair = require('./generate-privkey.js')(modlen,exp);
if (pair.private) { resolve(pair); return; }
pair = toJwks(pair);
resolve({ private: pair.private , public: pair.public });
} catch(e) {
reject(e);
}
});
};
// PKCS1 to JWK only
function toJwks(oldpair) {
var block = PEM.parseBlock(oldpair.privateKeyPem);
var asn1 = ASN1.parse(block.bytes);
var jwk = { kty: 'RSA', n: null, e: null };
jwk = x509.parsePkcs1(block.bytes, asn1, jwk);
return { private: jwk, public: neuter(jwk) };
}
// Copied from rsa.js to prevent circular dep
var privates = [ 'p', 'q', 'd', 'dp', 'dq', 'qi' ];
function neuter(priv) {
var pub = {};
Object.keys(priv).forEach(function (key) {
if (!privates.includes(key)) {
pub[key] = priv[key];
}
});
return pub;
}
if (require.main === module) {
module.exports.generate().then(function (pair) {
console.info(JSON.stringify(pair.private, null, 2));
console.info(JSON.stringify(pair.public, null, 2));
});
}

53
lib/generate-privkey-forge.js Normal file
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@ -0,0 +1,53 @@
// Copyright 2016-2018 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/. */
'use strict';
module.exports = function (bitlen, exp) {
var k = require('node-forge').pki.rsa
.generateKeyPair({ bits: bitlen || 2048, e: exp || 0x10001 }).privateKey;
var jwk = {
kty: "RSA"
, n: _toUrlBase64(k.n)
, e: _toUrlBase64(k.e)
, d: _toUrlBase64(k.d)
, p: _toUrlBase64(k.p)
, q: _toUrlBase64(k.q)
, dp: _toUrlBase64(k.dP)
, dq: _toUrlBase64(k.dQ)
, qi: _toUrlBase64(k.qInv)
};
return {
private: jwk
, public: {
kty: jwk.kty
, n: jwk.n
, e: jwk.e
}
};
};
function _toUrlBase64(fbn) {
var hex = fbn.toRadix(16);
if (hex.length % 2) {
// Invalid hex string
hex = '0' + hex;
}
while ('00' === hex.slice(0, 2)) {
hex = hex.slice(2);
}
return Buffer.from(hex, 'hex').toString('base64')
.replace(/\+/g, "-")
.replace(/\//g, "_")
.replace(/=/g,"")
;
}
if (require.main === module) {
var keypair = module.exports(2048, 0x10001);
console.info(keypair.private);
console.warn(keypair.public);
//console.info(keypair.privateKeyJwk);
//console.warn(keypair.publicKeyJwk);
}

26
lib/generate-privkey-node.js Normal file
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@ -0,0 +1,26 @@
// Copyright 2016-2018 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/. */
'use strict';
module.exports = function (bitlen, exp) {
var keypair = require('crypto').generateKeyPairSync(
'rsa'
, { modulusLength: bitlen
, publicExponent: exp
, privateKeyEncoding: { type: 'pkcs1', format: 'pem' }
, publicKeyEncoding: { type: 'pkcs1', format: 'pem' }
}
);
var result = { privateKeyPem: keypair.privateKey.trim() };
return result;
};
if (require.main === module) {
var keypair = module.exports(2048, 0x10001);
console.info(keypair.privateKeyPem);
console.warn(keypair.publicKeyPem);
//console.info(keypair.privateKeyJwk);
//console.warn(keypair.publicKeyJwk);
}

25
lib/generate-privkey-ursa.js Normal file
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@ -0,0 +1,25 @@
// Copyright 2016-2018 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/. */
'use strict';
module.exports = function (bitlen, exp) {
var ursa;
try {
ursa = require('ursa');
} catch(e) {
ursa = require('ursa-optional');
}
var keypair = ursa.generatePrivateKey(bitlen, exp);
var result = { privateKeyPem: keypair.toPrivatePem().toString('ascii').trim() };
return result;
};
if (require.main === module) {
var keypair = module.exports(2048, 0x10001);
console.info(keypair.privateKeyPem);
console.warn(keypair.publicKeyPem);
//console.info(keypair.privateKeyJwk);
//console.warn(keypair.publicKeyJwk);
}

67
lib/generate-privkey.js Normal file
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@ -0,0 +1,67 @@
// Copyright 2016-2018 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/. */
'use strict';
var oldver = false;
module.exports = function (bitlen, exp) {
bitlen = parseInt(bitlen, 10) || 2048;
exp = parseInt(exp, 10) || 65537;
try {
return require('./generate-privkey-node.js')(bitlen, exp);
} catch(e) {
if (!/generateKeyPairSync is not a function/.test(e.message)) {
throw e;
}
try {
return require('./generate-privkey-ursa.js')(bitlen, exp);
} catch(e) {
if (e.code !== 'MODULE_NOT_FOUND') {
console.error("[rsa-compat] Unexpected error when using 'ursa':");
console.error(e);
}
if (!oldver) {
oldver = true;
console.warn("[WARN] rsa-compat: Your version of node does not have crypto.generateKeyPair()");
console.warn("[WARN] rsa-compat: Please update to node >= v10.12 or 'npm install --save ursa node-forge'");
console.warn("[WARN] rsa-compat: Using node-forge as a fallback may be unacceptably slow.");
if (/arm|mips/i.test(require('os').arch)) {
console.warn("================================================================");
console.warn(" WARNING");
console.warn("================================================================");
console.warn("");
console.warn("WARNING: You are generating an RSA key using pure JavaScript on");
console.warn(" a VERY SLOW cpu. This could take DOZENS of minutes!");
console.warn("");
console.warn(" We recommend installing node >= v10.12, or 'gcc' and 'ursa'");
console.warn("");
console.warn("EXAMPLE:");
console.warn("");
console.warn(" sudo apt-get install build-essential && npm install ursa");
console.warn("");
console.warn("================================================================");
}
}
try {
return require('./generate-privkey-forge.js')(bitlen, exp);
} catch(e) {
if (e.code !== 'MODULE_NOT_FOUND') {
throw e;
}
console.error("[ERROR] rsa-compat: could not generate a private key.");
console.error("None of crypto.generateKeyPair, ursa, nor node-forge are present");
}
}
}
};
if (require.main === module) {
var keypair = module.exports(2048, 0x10001);
console.info(keypair.privateKeyPem);
console.warn(keypair.publicKeyPem);
//console.info(keypair.privateKeyJwk);
//console.warn(keypair.publicKeyJwk);
}

83
lib/rasha.js → lib/rsa.js
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@ -6,19 +6,30 @@ var PEM = require('./pem.js');
var x509 = require('./x509.js');
var ASN1 = require('./asn1.js');
var Enc = require('./encoding.js');
var Crypto = require('./crypto.js');
/*global Promise*/
RSA.generate = function (opts) {
return Promise.resolve().then(function () {
var typ = 'rsa';
opts.kty = "RSA";
return Crypto.generate(opts).then(function (pair) {
var format = opts.format;
var encoding = opts.encoding;
// The easy way
if ('json' === format && !encoding) {
format = 'jwk';
encoding = 'json';
}
if (('jwk' === format || !format) && ('json' === encoding || !encoding)) { return pair; }
if ('jwk' === format || 'json' === encoding) {
throw new Error("format '" + format + "' is incompatible with encoding '" + encoding + "'");
}
// The... less easy way
/*
var priv;
var pub;
if (!format) {
format = 'jwk';
}
if ('spki' === format || 'pkcs8' === format) {
format = 'pkcs8';
pub = 'spki';
@ -32,13 +43,8 @@ RSA.generate = function (opts) {
encoding = 'der';
}
if ('jwk' === format || 'json' === format) {
format = 'jwk';
encoding = 'json';
} else {
priv = format;
pub = pub || format;
}
priv = format;
pub = pub || format;
if (!encoding) {
encoding = 'pem';
@ -52,29 +58,19 @@ RSA.generate = function (opts) {
priv = { type: 'pkcs1', format: 'pem' };
pub = { type: 'pkcs1', format: 'pem' };
}
*/
if (('pem' === format || 'der' === format) && !encoding) {
encoding = format;
format = 'pkcs1';
}
return new Promise(function (resolve, reject) {
return require('crypto').generateKeyPair(typ, {
modulusLength: opts.modulusLength || 2048
, publicExponent: opts.publicExponent || 0x10001
, privateKeyEncoding: priv
, publicKeyEncoding: pub
}, function (err, pubkey, privkey) {
if (err) { reject(err); }
resolve({
private: privkey
, public: pubkey
});
var exOpts = { jwk: pair.private, format: format, encoding: encoding };
return RSA.export(exOpts).then(function (priv) {
exOpts.public = true;
if ('pkcs8' === exOpts.format) { exOpts.format = 'spki'; }
return RSA.export(exOpts).then(function (pub) {
return { private: priv, public: pub };
});
}).then(function (keypair) {
if ('jwk' !== format) {
return keypair;
}
return {
private: RSA.importSync({ pem: keypair.private, format: priv.type })
, public: RSA.importSync({ pem: keypair.public, format: pub.type, public: true })
};
});
});
};
@ -102,7 +98,7 @@ RSA.importSync = function (opts) {
}
if (opts.public) {
jwk = RSA.nueter(jwk);
jwk = RSA.neuter(jwk);
}
return jwk;
};
@ -139,7 +135,7 @@ RSA.exportSync = function (opts) {
var format = opts.format;
var pub = opts.public;
if (pub || -1 !== [ 'spki', 'pkix', 'ssh', 'rfc4716' ].indexOf(format)) {
jwk = RSA.nueter(jwk);
jwk = RSA.neuter(jwk);
}
if ('RSA' !== jwk.kty) {
throw new Error("options.jwk.kty must be 'RSA' for RSA keys");
@ -193,15 +189,16 @@ RSA.pack = function (opts) {
RSA.toPem = RSA.export = RSA.pack;
// snip the _private_ parts... hAHAHAHA!
RSA.nueter = function (jwk) {
// (snip rather than new object to keep potential extra data)
// otherwise we could just do this:
// return { kty: jwk.kty, n: jwk.n, e: jwk.e };
[ 'p', 'q', 'd', 'dp', 'dq', 'qi' ].forEach(function (key) {
if (key in jwk) { jwk[key] = undefined; }
return jwk;
var privates = [ 'p', 'q', 'd', 'dp', 'dq', 'qi' ];
// fix misspelling without breaking the API
RSA.neuter = RSA.nueter = function (priv) {
var pub = {};
Object.keys(priv).forEach(function (key) {
if (!privates.includes(key)) {
pub[key] = priv[key];
}
});
return jwk;
return pub;
};
RSA.__thumbprint = function (jwk) {

7
package.json
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@ -1,6 +1,6 @@
{
"name": "rasha",
"version": "1.2.5",
"version": "1.3.0",
"description": "💯 PEM-to-JWK and JWK-to-PEM for RSA keys in a lightweight, zero-dependency library focused on perfect universal compatibility.",
"homepage": "https://git.coolaj86.com/coolaj86/rasha.js",
"main": "index.js",
@ -35,5 +35,8 @@
"PEM-to-SSH"
],
"author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
"license": "MPL-2.0"
"license": "MPL-2.0",
"trulyOptionalDependencies": {
"node-forge": "^0.8.2"
}
}

8
test.sh
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@ -123,13 +123,21 @@ jwktopem ""
echo ""
echo "testing node key generation"
echo "defaults"
node bin/rasha.js > /dev/null
echo "jwk"
node bin/rasha.js jwk > /dev/null
echo "json 2048"
node bin/rasha.js json 2048 > /dev/null
echo "der"
node bin/rasha.js der > /dev/null
echo "pkcs8 der"
node bin/rasha.js pkcs8 der > /dev/null
echo "pem"
node bin/rasha.js pem > /dev/null
echo "pkcs1"
node bin/rasha.js pkcs1 pem > /dev/null
echo "spki"
node bin/rasha.js spki > /dev/null
echo "PASS"