'use strict'
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var inherits = require('inherits')
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var MD5 = require('md5.js')
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var RIPEMD160 = require('ripemd160')
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var sha = require('sha.js')
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var Base = require('cipher-base')
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function Hash (hash) {
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Base.call(this, 'digest')
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this._hash = hash
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}
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inherits(Hash, Base)
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Hash.prototype._update = function (data) {
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this._hash.update(data)
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}
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Hash.prototype._final = function () {
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return this._hash.digest()
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}
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module.exports = function createHash (alg) {
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alg = alg.toLowerCase()
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if (alg === 'md5') return new MD5()
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if (alg === 'rmd160' || alg === 'ripemd160') return new RIPEMD160()
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return new Hash(sha(alg))
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}
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