99 lines
2.5 KiB
JavaScript
99 lines
2.5 KiB
JavaScript
'use strict';
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var hashjs = require('hash.js');
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var sha512 = require('sha512');
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var crypto = require('crypto');
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var BufferUtil = require('../util/buffer');
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var $ = require('../util/preconditions');
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var Hash = module.exports;
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Hash.sha1 = function(buf) {
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$.checkArgument(BufferUtil.isBuffer(buf));
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return crypto.createHash('sha1').update(buf).digest();
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};
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Hash.sha1.blocksize = 512;
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Hash.sha256 = function(buf) {
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$.checkArgument(BufferUtil.isBuffer(buf));
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return crypto.createHash('sha256').update(buf).digest();
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};
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Hash.sha256.blocksize = 512;
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Hash.sha256sha256 = function(buf) {
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$.checkArgument(BufferUtil.isBuffer(buf));
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return Hash.sha256(Hash.sha256(buf));
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};
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Hash.ripemd160 = function(buf) {
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$.checkArgument(BufferUtil.isBuffer(buf));
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return crypto.createHash('ripemd160').update(buf).digest();
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};
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// Node.js crypto ripemd160 hashes are not supported in a browser
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// We'll replace with a (slower) version that does.
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if (process.browser) {
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Hash.ripemd160 = function(buf) {
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$.checkArgument(BufferUtil.isBuffer(buf));
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var hash = (new hashjs.ripemd160()).update(buf).digest();
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return new Buffer(hash);
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};
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}
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Hash.sha256ripemd160 = function(buf) {
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$.checkArgument(BufferUtil.isBuffer(buf));
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return Hash.ripemd160(Hash.sha256(buf));
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};
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Hash.sha512 = function(buf) {
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$.checkArgument(BufferUtil.isBuffer(buf));
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var hash = sha512(buf);
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return new Buffer(hash);
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};
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Hash.sha512.blocksize = 1024;
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Hash.hmac = function(hashf, data, key) {
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//http://en.wikipedia.org/wiki/Hash-based_message_authentication_code
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//http://tools.ietf.org/html/rfc4868#section-2
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$.checkArgument(BufferUtil.isBuffer(data));
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$.checkArgument(BufferUtil.isBuffer(key));
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$.checkArgument(hashf.blocksize);
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var blocksize = hashf.blocksize / 8;
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if (key.length > blocksize) {
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key = hashf(key);
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} else if (key < blocksize) {
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var fill = new Buffer(blocksize);
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fill.fill(0);
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key.copy(fill);
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key = fill;
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}
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var o_key = new Buffer(blocksize);
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o_key.fill(0x5c);
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var i_key = new Buffer(blocksize);
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i_key.fill(0x36);
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var o_key_pad = new Buffer(blocksize);
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var i_key_pad = new Buffer(blocksize);
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for (var i = 0; i < blocksize; i++) {
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o_key_pad[i] = o_key[i] ^ key[i];
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i_key_pad[i] = i_key[i] ^ key[i];
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}
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return hashf(Buffer.concat([o_key_pad, hashf(Buffer.concat([i_key_pad, data]))]));
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};
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Hash.sha256hmac = function(data, key) {
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return Hash.hmac(Hash.sha256, data, key);
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};
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Hash.sha512hmac = function(data, key) {
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return Hash.hmac(Hash.sha512, data, key);
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};
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