browser.js
1.01 KB
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'use strict';
var inherits = require('inherits')
var md5 = require('./md5')
var rmd160 = require('ripemd160')
var sha = require('sha.js')
var Base = require('cipher-base')
function HashNoConstructor(hash) {
Base.call(this, 'digest')
this._hash = hash
this.buffers = []
}
inherits(HashNoConstructor, Base)
HashNoConstructor.prototype._update = function (data) {
this.buffers.push(data)
}
HashNoConstructor.prototype._final = function () {
var buf = Buffer.concat(this.buffers)
var r = this._hash(buf)
this.buffers = null
return r
}
function Hash(hash) {
Base.call(this, 'digest')
this._hash = hash
}
inherits(Hash, Base)
Hash.prototype._update = function (data) {
this._hash.update(data)
}
Hash.prototype._final = function () {
return this._hash.digest()
}
module.exports = function createHash (alg) {
alg = alg.toLowerCase()
if ('md5' === alg) return new HashNoConstructor(md5)
if ('rmd160' === alg || 'ripemd160' === alg) return new HashNoConstructor(rmd160)
return new Hash(sha(alg))
}