155 lines
3.6 KiB
JavaScript
155 lines
3.6 KiB
JavaScript
'use strict';
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var native = module.exports;
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// XXX provided by caller: export
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var RSA = native;
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var PEM = require('../pem.js');
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var x509 = require('../x509.js');
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var ASN1 = require('../asn1/parser.js');
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native.generate = function(opts) {
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opts.kty = 'RSA';
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return native._generate(opts).then(function(pair) {
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var format = opts.format;
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var encoding = opts.encoding;
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// The easy way
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if ('json' === format && !encoding) {
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format = 'jwk';
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encoding = 'json';
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}
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if (
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('jwk' === format || !format) &&
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('json' === encoding || !encoding)
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) {
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return pair;
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}
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if ('jwk' === format || 'json' === encoding) {
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throw new Error(
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"format '" +
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format +
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"' is incompatible with encoding '" +
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encoding +
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"'"
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);
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}
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// The... less easy way
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/*
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var priv;
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var pub;
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if ('spki' === format || 'pkcs8' === format) {
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format = 'pkcs8';
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pub = 'spki';
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}
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if ('pem' === format) {
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format = 'pkcs1';
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encoding = 'pem';
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} else if ('der' === format) {
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format = 'pkcs1';
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encoding = 'der';
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}
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priv = format;
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pub = pub || format;
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if (!encoding) {
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encoding = 'pem';
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}
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if (priv) {
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priv = { type: priv, format: encoding };
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pub = { type: pub, format: encoding };
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} else {
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// jwk
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priv = { type: 'pkcs1', format: 'pem' };
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pub = { type: 'pkcs1', format: 'pem' };
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}
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*/
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if (('pem' === format || 'der' === format) && !encoding) {
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encoding = format;
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format = 'pkcs1';
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}
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var exOpts = { jwk: pair.private, format: format, encoding: encoding };
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return RSA.export(exOpts).then(function(priv) {
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exOpts.public = true;
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if ('pkcs8' === exOpts.format) {
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exOpts.format = 'spki';
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}
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return RSA.export(exOpts).then(function(pub) {
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return { private: priv, public: pub };
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});
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});
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});
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};
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native._generate = function(opts) {
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if (!opts) {
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opts = {};
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}
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return new Promise(function(resolve, reject) {
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try {
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var modlen = opts.modulusLength || 2048;
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var exp = opts.publicExponent || 0x10001;
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var pair = require('./generate-privkey.js')(modlen, exp);
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if (pair.private) {
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resolve(pair);
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return;
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}
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pair = toJwks(pair);
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resolve({ private: pair.private, public: pair.public });
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} catch (e) {
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reject(e);
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}
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});
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};
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// PKCS1 to JWK only
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function toJwks(oldpair) {
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var block = PEM.parseBlock(oldpair.privateKeyPem);
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var asn1 = ASN1.parse(block.bytes);
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var jwk = { kty: 'RSA', n: null, e: null };
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jwk = x509.parsePkcs1(block.bytes, asn1, jwk);
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return { private: jwk, public: RSA.neuter({ jwk: jwk }) };
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}
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// TODO
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var Enc = require('@root/encoding/base64');
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x509.parsePkcs1 = function parseRsaPkcs1(buf, asn1, jwk) {
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if (
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!asn1.children.every(function(el) {
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return 0x02 === el.type;
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})
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) {
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throw new Error(
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'not an RSA PKCS#1 public or private key (not all ints)'
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);
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}
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if (2 === asn1.children.length) {
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jwk.n = Enc.bufToUrlBase64(asn1.children[0].value);
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jwk.e = Enc.bufToUrlBase64(asn1.children[1].value);
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return jwk;
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} else if (asn1.children.length >= 9) {
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// the standard allows for "otherPrimeInfos", hence at least 9
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jwk.n = Enc.bufToUrlBase64(asn1.children[1].value);
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jwk.e = Enc.bufToUrlBase64(asn1.children[2].value);
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jwk.d = Enc.bufToUrlBase64(asn1.children[3].value);
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jwk.p = Enc.bufToUrlBase64(asn1.children[4].value);
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jwk.q = Enc.bufToUrlBase64(asn1.children[5].value);
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jwk.dp = Enc.bufToUrlBase64(asn1.children[6].value);
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jwk.dq = Enc.bufToUrlBase64(asn1.children[7].value);
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jwk.qi = Enc.bufToUrlBase64(asn1.children[8].value);
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return jwk;
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} else {
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throw new Error(
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'not an RSA PKCS#1 public or private key (wrong number of ints)'
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);
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}
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};
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