57 lines
1.4 KiB
JavaScript
57 lines
1.4 KiB
JavaScript
'use strict';
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var PEM = module.exports;
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var Enc = require('./encoding.js');
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// TODO move object id hinting to x509.js
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// 1.2.840.10045.3.1.7
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// prime256v1 (ANSI X9.62 named elliptic curve)
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var OBJ_ID_EC = '06 08 2A8648CE3D030107'.replace(/\s+/g, '').toLowerCase();
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// 1.3.132.0.34
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// secp384r1 (SECG (Certicom) named elliptic curve)
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var OBJ_ID_EC_384 = '06 05 2B81040022'.replace(/\s+/g, '').toLowerCase();
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PEM.parseBlock = function pemToDer(pem) {
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var typ;
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var pub;
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var crv;
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var der = Buffer.from(pem.split(/\n/).filter(function (line, i) {
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if (0 === i) {
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if (/ PUBLIC /.test(line)) {
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pub = true;
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} else if (/ PRIVATE /.test(line)) {
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pub = false;
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}
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if (/ EC/.test(line)) {
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typ = 'EC';
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}
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}
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return !/---/.test(line);
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}).join(''), 'base64');
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if (!typ || 'EC' === typ) {
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var hex = Enc.bufToHex(der);
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if (-1 !== hex.indexOf(OBJ_ID_EC)) {
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typ = 'EC';
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crv = 'P-256';
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} else if (-1 !== hex.indexOf(OBJ_ID_EC_384)) {
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typ = 'EC';
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crv = 'P-384';
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} else {
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// TODO support P-384 as well (but probably nothing else)
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console.warn("unsupported ec curve");
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}
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}
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return { kty: typ, pub: pub, der: der, crv: crv };
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};
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PEM.packBlock = function (opts) {
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// TODO allow for headers?
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return '-----BEGIN ' + opts.type + '-----\n'
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+ Enc.bufToBase64(opts.bytes).match(/.{1,64}/g).join('\n') + '\n'
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+ '-----END ' + opts.type + '-----'
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;
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};
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