121 lines
3.8 KiB
JavaScript
121 lines
3.8 KiB
JavaScript
'use strict';
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var RSA = module.exports;
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var SSH = require('./ssh.js');
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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.js');
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/*global Promise*/
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RSA.parse = function parseRsa(opts) {
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return Promise.resolve().then(function () {
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if (!opts || !opts.pem || 'string' !== typeof opts.pem) {
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throw new Error("must pass { pem: pem } as a string");
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}
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var jwk = { kty: 'RSA', n: null, e: null };
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if (0 === opts.pem.indexOf('ssh-rsa ')) {
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return SSH.parse(opts.pem, jwk);
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}
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var pem = opts.pem;
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var block = PEM.parseBlock(pem);
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//var hex = toHex(u8);
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var asn1 = ASN1.parse(block.der);
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var meta = x509.guess(block.der, asn1);
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if ('pkcs1' === meta.format) {
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jwk = x509.parsePkcs1(block.der, asn1, jwk);
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} else {
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jwk = x509.parsePkcs8(block.der, asn1, jwk);
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}
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if (opts.public) {
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jwk = RSA.nueter(jwk);
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}
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return jwk;
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});
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};
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RSA.toJwk = RSA.import = RSA.parse;
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/*
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RSAPrivateKey ::= SEQUENCE {
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version Version,
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modulus INTEGER, -- n
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publicExponent INTEGER, -- e
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privateExponent INTEGER, -- d
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prime1 INTEGER, -- p
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prime2 INTEGER, -- q
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exponent1 INTEGER, -- d mod (p-1)
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exponent2 INTEGER, -- d mod (q-1)
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coefficient INTEGER, -- (inverse of q) mod p
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otherPrimeInfos OtherPrimeInfos OPTIONAL
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}
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*/
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RSA.pack = function (opts) {
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return Promise.resolve().then(function () {
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if (!opts || !opts.jwk || 'object' !== typeof opts.jwk) {
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throw new Error("must pass { jwk: jwk }");
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}
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var jwk = JSON.parse(JSON.stringify(opts.jwk));
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var format = opts.format;
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var pub = opts.public;
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if (pub || -1 !== [ 'spki', 'pkix', 'ssh', 'rfc4716' ].indexOf(format)) {
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jwk = RSA.nueter(jwk);
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}
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if ('RSA' !== jwk.kty) {
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throw new Error("options.jwk.kty must be 'RSA' for RSA keys");
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}
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if (!jwk.p) {
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// TODO test for n and e
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pub = true;
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if (!format || 'pkcs1' === format) {
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format = 'pkcs1';
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} else if (-1 !== [ 'spki', 'pkix' ].indexOf(format)) {
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format = 'spki';
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} else if (-1 !== [ 'ssh', 'rfc4716' ].indexOf(format)) {
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format = 'ssh';
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} else {
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throw new Error("options.format must be 'spki', 'pkcs1', or 'ssh' for public RSA keys, not ("
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+ typeof format + ") " + format);
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}
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} else {
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// TODO test for all necessary keys (d, p, q ...)
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if (!format || 'pkcs1' === format) {
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format = 'pkcs1';
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} else if ('pkcs8' !== format) {
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throw new Error("options.format must be 'pkcs1' or 'pkcs8' for private RSA keys");
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}
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}
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if ('pkcs1' === format) {
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if (jwk.d) {
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return PEM.packBlock({ type: "RSA PRIVATE KEY", bytes: x509.packPkcs1(jwk) });
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} else {
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return PEM.packBlock({ type: "RSA PUBLIC KEY", bytes: x509.packPkcs1(jwk) });
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}
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} else if ('pkcs8' === format) {
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return PEM.packBlock({ type: "PRIVATE KEY", bytes: x509.packPkcs8(jwk) });
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} else if (-1 !== [ 'spki', 'pkix' ].indexOf(format)) {
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return PEM.packBlock({ type: "PUBLIC KEY", bytes: x509.packSpki(jwk) });
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} else if (-1 !== [ 'ssh', 'rfc4716' ].indexOf(format)) {
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return SSH.pack({ jwk: jwk, comment: opts.comment });
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} else {
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throw new Error("Sanity Error: reached unreachable code block with format: " + format);
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}
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});
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};
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RSA.toPem = RSA.export = RSA.pack;
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// snip the _private_ parts... hAHAHAHA!
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RSA.nueter = function (jwk) {
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// (snip rather than new object to keep potential extra data)
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// otherwise we could just do this:
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// return { kty: jwk.kty, n: jwk.n, e: jwk.e };
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[ 'p', 'q', 'd', 'dp', 'dq', 'qi' ].forEach(function (key) {
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if (key in jwk) { jwk[key] = undefined; }
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return jwk;
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});
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return jwk;
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};
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