123 lines
3.4 KiB
JavaScript
123 lines
3.4 KiB
JavaScript
'use strict';
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var crypto = require('crypto');
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var ASN1 = require('./asn1.js');
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var Enc = require('./encoding.js');
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var PEM = require('./pem.js');
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var X509 = require('./x509.js');
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var RSA = {};
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/*global Promise*/
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var CSR = module.exports = function rsacsr(opts) {
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// We're using a Promise here to be compatible with the browser version
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// which will probably use the webcrypto API for some of the conversions
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return Promise.resolve().then(function () {
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var Rasha;
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opts = JSON.parse(JSON.stringify(opts));
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var pem, jwk;
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// We do a bit of extra error checking for user convenience
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if (!opts) { throw new Error("You must pass options with key and domains to rsacsr"); }
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if (!Array.isArray(opts.domains) || 0 === opts.domains.length) {
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new Error("You must pass options.domains as a non-empty array");
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}
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// I need to check that 例.中国 is a valid domain name
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if (!opts.domains.every(function (d) {
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// allow punycode? xn--
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if ('string' === typeof d /*&& /\./.test(d) && !/--/.test(d)*/) {
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return true;
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}
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})) {
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throw new Error("You must pass options.domains as strings");
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}
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if (opts.pem) {
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pem = opts.pem;
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} else if (opts.jwk) {
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jwk = opts.jwk;
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} else {
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if (!opts.key) {
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throw new Error("You must pass options.key as a JSON web key");
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} else if (opts.key.kty) {
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jwk = opts.key;
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} else {
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pem = opts.key;
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}
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}
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if (pem) {
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try {
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Rasha = require('rasha');
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} catch(e) {
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throw new Error("Rasha.js is an optional dependency for PEM-to-JWK.\n"
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+ "Install it if you'd like to use it:\n"
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+ "\tnpm install --save rasha\n"
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+ "Otherwise supply a jwk as the private key."
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);
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}
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jwk = Rasha.importSync({ pem: pem });
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}
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opts.jwk = jwk;
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return CSR.create(opts).then(function (bytes) {
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return PEM.packBlock({
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type: "CERTIFICATE REQUEST"
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, bytes: bytes /* { jwk: jwk, domains: opts.domains } */
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});
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});
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});
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};
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CSR.create = function createCsr(opts) {
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var hex = CSR.request(opts.jwk, opts.domains);
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return CSR.sign(opts.jwk, hex).then(function (csr) {
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return Enc.hexToBuf(csr);
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});
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};
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CSR.request = function createCsrBodyEc(jwk, domains) {
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var asn1pub = X509.packCsrPublicKey(jwk);
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return X509.packCsr(asn1pub, domains);
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};
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CSR.sign = function csrEcSig(jwk, request) {
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var keypem = PEM.packBlock({ type: "RSA PRIVATE KEY", bytes: X509.packPkcs1(jwk) });
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return RSA.sign(keypem, Enc.hexToBuf(request)).then(function (sig) {
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var sty = ASN1('30'
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// 1.2.840.113549.1.1.11 sha256WithRSAEncryption (PKCS #1)
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, ASN1('06', '2a864886f70d01010b')
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, ASN1('05')
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);
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return ASN1('30'
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// The Full CSR Request Body
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, request
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// The Signature Type
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, sty
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// The Signature
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, ASN1.BitStr(Enc.bufToHex(sig))
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);
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});
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};
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//
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// RSA
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//
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// Took some tips from https://gist.github.com/codermapuche/da4f96cdb6d5ff53b7ebc156ec46a10a
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RSA.sign = function signRsa(keypem, ab) {
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return Promise.resolve().then(function () {
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// Signer is a stream
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var sign = crypto.createSign('SHA256');
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sign.write(ab);
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sign.end();
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// The signature is ASN1 encoded, as it turns out
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var sig = sign.sign(keypem);
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// Convert to a JavaScript ArrayBuffer just because
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return sig.buffer.slice(sig.byteOffset, sig.byteOffset + sig.byteLength);
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});
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};
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