bitcoinjs-lib/src/crypto.js
2014-04-08 23:44:55 +10:00

40 lines
1,018 B
JavaScript

// Crypto, crypto, where art thou crypto
var CryptoJS = require('crypto-js')
var crypto = require('crypto')
var convert = require('./convert')
function hash160(buffer) {
if (!Buffer.isBuffer(buffer)) buffer = new Buffer(buffer) // FIXME: transitionary
var step1 = sha256(buffer)
var step2a = convert.bytesToWordArray(step1)
var step2b = CryptoJS.RIPEMD160(step2a)
return new Buffer(convert.wordArrayToBytes(step2b))
}
function hash256(buffer) {
if (!Buffer.isBuffer(buffer)) buffer = new Buffer(buffer) // FIXME: transitionary
return sha256(sha256(buffer))
}
function sha1(buffer) {
if (!Buffer.isBuffer(buffer)) buffer = new Buffer(buffer) // FIXME: transitionary
return crypto.createHash('sha1').update(buffer).digest()
}
function sha256(buffer) {
if (!Buffer.isBuffer(buffer)) buffer = new Buffer(buffer) // FIXME: transitionary
return crypto.createHash('sha256').update(buffer).digest()
}
module.exports = {
sha1: sha1,
sha256: sha256,
hash160: hash160,
hash256: hash256
}