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