51 lines
1.3 KiB
JavaScript
51 lines
1.3 KiB
JavaScript
/*!
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* backend.js - crypto backend for bcoin
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* Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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'use strict';
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var utils = require('../utils/utils');
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var crypto = require('crypto');
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var backend = exports;
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backend.hash = function hash(alg, data) {
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return crypto.createHash(alg).update(data).digest();
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};
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backend.hmac = function hmac(alg, data, salt) {
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var hmac = crypto.createHmac(alg, salt);
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return hmac.update(data).digest();
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};
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backend.pbkdf2 = function pbkdf2(key, salt, iter, len, alg) {
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return crypto.pbkdf2Sync(key, salt, iter, len, alg);
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};
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if (!crypto.pbkdf2Sync)
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backend.pbkdf2 = null;
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backend.pbkdf2Async = function pbkdf2Async(key, salt, iter, len, alg, callback) {
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return crypto.pbkdf2(key, salt, iter, len, alg, callback);
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};
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if (!crypto.pbkdf2)
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backend.pbkdf2Async = null;
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backend.encipher = function encipher(data, key, iv) {
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var cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
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return utils.concat(cipher.update(data), cipher.final());
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};
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backend.decipher = function decipher(data, key, iv) {
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var decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
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try {
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return utils.concat(decipher.update(data), decipher.final());
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} catch (e) {
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throw new Error('Bad key for decryption.');
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}
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};
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backend.randomBytes = crypto.randomBytes;
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