export createHash and createHmac

Author: dominictarr

index.js

@@ -1,59 +1,5 @@
 var Buffer = require('buffer').Buffer
-var sha = require('./sha')
-var sha256 = require('./sha256')
 var rng = require('./rng')
-var md5 = require('./md5')
-
-var algorithms = {
-  sha1: sha,
-  sha256: sha256,
-  md5: md5
-}
-
-var blocksize = 64
-var zeroBuffer = new Buffer(blocksize); zeroBuffer.fill(0)
-function hmac(fn, key, data) {
-  if(!Buffer.isBuffer(key)) key = new Buffer(key)
-  if(!Buffer.isBuffer(data)) data = new Buffer(data)
-
-  if(key.length > blocksize) {
-    key = fn(key)
-  } else if(key.length < blocksize) {
-    key = Buffer.concat([key, zeroBuffer], blocksize)
-  }
-
-  var ipad = new Buffer(blocksize), opad = new Buffer(blocksize)
-  for(var i = 0; i < blocksize; i++) {
-    ipad[i] = key[i] ^ 0x36
-    opad[i] = key[i] ^ 0x5C
-  }
-
-  var hash = fn(Buffer.concat([ipad, data]))
-  return fn(Buffer.concat([opad, hash]))
-}
-
-function hash(alg, key) {
-  alg = alg || 'sha1'
-  var fn = algorithms[alg]
-  var bufs = []
-  var length = 0
-  if(!fn) error('algorithm:', alg, 'is not yet supported')
-  return {
-    update: function (data) {
-      if(!Buffer.isBuffer(data)) data = new Buffer(data)
-        
-      bufs.push(data)
-      length += data.length
-      return this
-    },
-    digest: function (enc) {
-      var buf = Buffer.concat(bufs)
-      var r = key ? hmac(fn, key, buf) : fn(buf)
-      bufs = null
-      return enc ? r.toString(enc) : r
-    }
-  }
-}
 
 function error () {
   var m = [].slice.call(arguments).join(' ')
@@ -64,8 +10,10 @@ function error () {
     ].join('\n'))
 }
 
-exports.createHash = function (alg) { return hash(alg) }
-exports.createHmac = function (alg, key) { return hash(alg, key) }
+exports.createHash = require('./create-hash')
+
+exports.createHmac = require('./create-hmac')
+
 exports.randomBytes = function(size, callback) {
   if (callback && callback.call) {
     try {