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// Copyright 2015 Joyent, Inc.
module.exports = {
read: read,
readPkcs1: readPkcs1,
write: write,
writePkcs1: writePkcs1
};
var assert = require('assert-plus');
var asn1 = require('asn1');
var Buffer = require('safer-buffer').Buffer;
var algs = require('../algs');
var utils = require('../utils');
var Key = require('../key');
var PrivateKey = require('../private-key');
var pem = require('./pem');
var pkcs8 = require('./pkcs8');
var readECDSACurve = pkcs8.readECDSACurve;
function read(buf, options) {
return (pem.read(buf, options, 'pkcs1'));
}
function write(key, options) {
return (pem.write(key, options, 'pkcs1'));
}
/* Helper to read in a single mpint */
function readMPInt(der, nm) {
assert.strictEqual(der.peek(), asn1.Ber.Integer,
nm + ' is not an Integer');
return (utils.mpNormalize(der.readString(asn1.Ber.Integer, true)));
}
function readPkcs1(alg, type, der) {
switch (alg) {
case 'RSA':
if (type === 'public')
return (readPkcs1RSAPublic(der));
else if (type === 'private')
return (readPkcs1RSAPrivate(der));
throw (new Error('Unknown key type: ' + type));
case 'DSA':
if (type === 'public')
return (readPkcs1DSAPublic(der));
else if (type === 'private')
return (readPkcs1DSAPrivate(der));
throw (new Error('Unknown key type: ' + type));
case 'EC':
case 'ECDSA':
if (type === 'private')
return (readPkcs1ECDSAPrivate(der));
else if (type === 'public')
return (readPkcs1ECDSAPublic(der));
throw (new Error('Unknown key type: ' + type));
case 'EDDSA':
case 'EdDSA':
if (type === 'private')
return (readPkcs1EdDSAPrivate(der));
throw (new Error(type + ' keys not supported with EdDSA'));
default:
throw (new Error('Unknown key algo: ' + alg));
}
}
function readPkcs1RSAPublic(der) {
// modulus and exponent
var n = readMPInt(der, 'modulus');
var e = readMPInt(der, 'exponent');
// now, make the key
var key = {
type: 'rsa',
parts: [
{ name: 'e', data: e },
{ name: 'n', data: n }
]
};
return (new Key(key));
}
function readPkcs1RSAPrivate(der) {
var version = readMPInt(der, 'version');
assert.strictEqual(version[0], 0);
// modulus then public exponent
var n = readMPInt(der, 'modulus');
var e = readMPInt(der, 'public exponent');
var d = readMPInt(der, 'private exponent');
var p = readMPInt(der, 'prime1');
var q = readMPInt(der, 'prime2');
var dmodp = readMPInt(der, 'exponent1');
var dmodq = readMPInt(der, 'exponent2');
var iqmp = readMPInt(der, 'iqmp');
// now, make the key
var key = {
type: 'rsa',
parts: [
{ name: 'n', data: n },
{ name: 'e', data: e },
{ name: 'd', data: d },
{ name: 'iqmp', data: iqmp },
{ name: 'p', data: p },
{ name: 'q', data: q },
{ name: 'dmodp', data: dmodp },
{ name: 'dmodq', data: dmodq }
]
};
return (new PrivateKey(key));
}
function readPkcs1DSAPrivate(der) {
var version = readMPInt(der, 'version');
assert.strictEqual(version.readUInt8(0), 0);
var p = readMPInt(der, 'p');
var q = readMPInt(der, 'q');
var g = readMPInt(der, 'g');
var y = readMPInt(der, 'y');
var x = readMPInt(der, 'x');
// now, make the key
var key = {
type: 'dsa',
parts: [
{ name: 'p', data: p },
{ name: 'q', data: q },
{ name: 'g', data: g },
{ name: 'y', data: y },
{ name: 'x', data: x }
]
};
return (new PrivateKey(key));
}
function readPkcs1EdDSAPrivate(der) {
var version = readMPInt(der, 'version');
assert.strictEqual(version.readUInt8(0), 1);
// private key
var k = der.readString(asn1.Ber.OctetString, true);
der.readSequence(0xa0);
var oid = der.readOID();
assert.strictEqual(oid, '1.3.101.112', 'the ed25519 curve identifier');
der.readSequence(0xa1);
var A = utils.readBitString(der);
var key = {
type: 'ed25519',
parts: [
{ name: 'A', data: utils.zeroPadToLength(A, 32) },
{ name: 'k', data: k }
]
};
return (new PrivateKey(key));
}
function readPkcs1DSAPublic(der) {
var y = readMPInt(der, 'y');
var p = readMPInt(der, 'p');
var q = readMPInt(der, 'q');
var g = readMPInt(der, 'g');
var key = {
type: 'dsa',
parts: [
{ name: 'y', data: y },
{ name: 'p', data: p },
{ name: 'q', data: q },
{ name: 'g', data: g }
]
};
return (new Key(key));
}
function readPkcs1ECDSAPublic(der) {
der.readSequence();
var oid = der.readOID();
assert.strictEqual(oid, '1.2.840.10045.2.1', 'must be ecPublicKey');
var curveOid = der.readOID();
var curve;
var curves = Object.keys(algs.curves);
for (var j = 0; j < curves.length; ++j) {
var c = curves[j];
var cd = algs.curves[c];
if (cd.pkcs8oid === curveOid) {
curve = c;
break;
}
}
assert.string(curve, 'a known ECDSA named curve');
var Q = der.readString(asn1.Ber.BitString, true);
Q = utils.ecNormalize(Q);
var key = {
type: 'ecdsa',
parts: [
{ name: 'curve', data: Buffer.from(curve) },
{ name: 'Q', data: Q }
]
};
return (new Key(key));
}
function readPkcs1ECDSAPrivate(der) {
var version = readMPInt(der, 'version');
assert.strictEqual(version.readUInt8(0), 1);
// private key
var d = der.readString(asn1.Ber.OctetString, true);
der.readSequence(0xa0);
var curve = readECDSACurve(der);
assert.string(curve, 'a known elliptic curve');
der.readSequence(0xa1);
var Q = der.readString(asn1.Ber.BitString, true);
Q = utils.ecNormalize(Q);
var key = {
type: 'ecdsa',
parts: [
{ name: 'curve', data: Buffer.from(curve) },
{ name: 'Q', data: Q },
{ name: 'd', data: d }
]
};
return (new PrivateKey(key));
}
function writePkcs1(der, key) {
der.startSequence();
switch (key.type) {
case 'rsa':
if (PrivateKey.isPrivateKey(key))
writePkcs1RSAPrivate(der, key);
else
writePkcs1RSAPublic(der, key);
break;
case 'dsa':
if (PrivateKey.isPrivateKey(key))
writePkcs1DSAPrivate(der, key);
else
writePkcs1DSAPublic(der, key);
break;
case 'ecdsa':
if (PrivateKey.isPrivateKey(key))
writePkcs1ECDSAPrivate(der, key);
else
writePkcs1ECDSAPublic(der, key);
break;
case 'ed25519':
if (PrivateKey.isPrivateKey(key))
writePkcs1EdDSAPrivate(der, key);
else
writePkcs1EdDSAPublic(der, key);
break;
default:
throw (new Error('Unknown key algo: ' + key.type));
}
der.endSequence();
}
function writePkcs1RSAPublic(der, key) {
der.writeBuffer(key.part.n.data, asn1.Ber.Integer);
der.writeBuffer(key.part.e.data, asn1.Ber.Integer);
}
function writePkcs1RSAPrivate(der, key) {
var ver = Buffer.from([0]);
der.writeBuffer(ver, asn1.Ber.Integer);
der.writeBuffer(key.part.n.data, asn1.Ber.Integer);
der.writeBuffer(key.part.e.data, asn1.Ber.Integer);
der.writeBuffer(key.part.d.data, asn1.Ber.Integer);
der.writeBuffer(key.part.p.data, asn1.Ber.Integer);
der.writeBuffer(key.part.q.data, asn1.Ber.Integer);
if (!key.part.dmodp || !key.part.dmodq)
utils.addRSAMissing(key);
der.writeBuffer(key.part.dmodp.data, asn1.Ber.Integer);
der.writeBuffer(key.part.dmodq.data, asn1.Ber.Integer);
der.writeBuffer(key.part.iqmp.data, asn1.Ber.Integer);
}
function writePkcs1DSAPrivate(der, key) {
var ver = Buffer.from([0]);
der.writeBuffer(ver, asn1.Ber.Integer);
der.writeBuffer(key.part.p.data, asn1.Ber.Integer);
der.writeBuffer(key.part.q.data, asn1.Ber.Integer);
der.writeBuffer(key.part.g.data, asn1.Ber.Integer);
der.writeBuffer(key.part.y.data, asn1.Ber.Integer);
der.writeBuffer(key.part.x.data, asn1.Ber.Integer);
}
function writePkcs1DSAPublic(der, key) {
der.writeBuffer(key.part.y.data, asn1.Ber.Integer);
der.writeBuffer(key.part.p.data, asn1.Ber.Integer);
der.writeBuffer(key.part.q.data, asn1.Ber.Integer);
der.writeBuffer(key.part.g.data, asn1.Ber.Integer);
}
function writePkcs1ECDSAPublic(der, key) {
der.startSequence();
der.writeOID('1.2.840.10045.2.1'); /* ecPublicKey */
var curve = key.part.curve.data.toString();
var curveOid = algs.curves[curve].pkcs8oid;
assert.string(curveOid, 'a known ECDSA named curve');
der.writeOID(curveOid);
der.endSequence();
var Q = utils.ecNormalize(key.part.Q.data, true);
der.writeBuffer(Q, asn1.Ber.BitString);
}
function writePkcs1ECDSAPrivate(der, key) {
var ver = Buffer.from([1]);
der.writeBuffer(ver, asn1.Ber.Integer);
der.writeBuffer(key.part.d.data, asn1.Ber.OctetString);
der.startSequence(0xa0);
var curve = key.part.curve.data.toString();
var curveOid = algs.curves[curve].pkcs8oid;
assert.string(curveOid, 'a known ECDSA named curve');
der.writeOID(curveOid);
der.endSequence();
der.startSequence(0xa1);
var Q = utils.ecNormalize(key.part.Q.data, true);
der.writeBuffer(Q, asn1.Ber.BitString);
der.endSequence();
}
function writePkcs1EdDSAPrivate(der, key) {
var ver = Buffer.from([1]);
der.writeBuffer(ver, asn1.Ber.Integer);
der.writeBuffer(key.part.k.data, asn1.Ber.OctetString);
der.startSequence(0xa0);
der.writeOID('1.3.101.112');
der.endSequence();
der.startSequence(0xa1);
utils.writeBitString(der, key.part.A.data);
der.endSequence();
}
function writePkcs1EdDSAPublic(der, key) {
throw (new Error('Public keys are not supported for EdDSA PKCS#1'));
}