75 lines
1.7 KiB
JavaScript
75 lines
1.7 KiB
JavaScript
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/*!
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* algorithms/rsa-util.js - RSA Utility Functions
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*
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* Copyright (c) 2015 Cisco Systems, Inc. See LICENSE file.
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*/
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"use strict";
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var clone = require("lodash/clone"),
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forge = require("../deps/forge.js"),
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util = require("../util");
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// ### RSA-specific Helpers
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function convertToForge(key, isPublic) {
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var parts = isPublic ?
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["n", "e"] :
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["n", "e", "d", "p", "q", "dp", "dq", "qi"];
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parts = parts.map(function(f) {
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return new forge.jsbn.BigInteger(key[f].toString("hex"), 16);
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});
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var fn = isPublic ?
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forge.pki.rsa.setPublicKey :
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forge.pki.rsa.setPrivateKey;
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return fn.apply(forge.pki.rsa, parts);
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}
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function convertToJWK(key, isPublic) {
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var result = clone(key);
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var parts = isPublic ?
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["n", "e"] :
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["n", "e", "d", "p", "q", "dp", "dq", "qi"];
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parts.forEach(function(f) {
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result[f] = util.base64url.encode(result[f]);
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});
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// remove potentially troublesome properties
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delete result.key_ops;
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delete result.use;
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delete result.alg;
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if (isPublic) {
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delete result.d;
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delete result.p;
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delete result.q;
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delete result.dp;
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delete result.dq;
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delete result.qi;
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}
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return result;
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}
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function convertToPem(key, isPublic) {
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var cacheKey = isPublic ? "__cachedPublicPem" : "__cachedPrivatePem";
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if (key[cacheKey]) {
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return key[cacheKey];
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}
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var value;
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if (isPublic) {
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value = forge.pki.publicKeyToPem(convertToForge(key, isPublic));
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} else {
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value = forge.pki.privateKeyToPem(convertToForge(key, isPublic));
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}
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Object.defineProperty(key, cacheKey, { value: value });
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return value;
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}
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module.exports = {
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convertToForge: convertToForge,
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convertToJWK: convertToJWK,
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convertToPem: convertToPem
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};
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