Cleaning up utils.

utils/hmac.js

@@ -1,53 +1,22 @@
 'use strict';
 
-// See: https://github.com/dominictarr/hmac
-//
-// The only difference between this and the original is this uses Uint8Array instead of Buffer
-
-
-// @TODO: Use the hmac in hash.js instead
+var hash = require('hash.js');
 
 var convert = require('./convert.js');
 
-var zeroBuffer = new Uint8Array(128)
+// @TODO: Make this use create-hmac in node
 
-function Hmac (createHash, blocksize, key) {
-    if(!(this instanceof Hmac)) { throw new Error('missing new'); }
-
-    this._opad = opad
-    this._createHash = createHash
-
-    if(blocksize !== 128 && blocksize !== 64) {
-        throw new Error('blocksize must be either 64 for or 128 , but was:' + blocksize);
-    }
-
-    key = this._key = convert.arrayify(key);
-
-    if(key.length > blocksize) {
-        key = this._createHash().update(key).digest()
-    } else if(key.length < blocksize) {
-        key = convert.concat([key, zeroBuffer], blocksize)
-    }
-
-    var ipad = this._ipad = new Uint8Array(blocksize)
-    var opad = this._opad = new Uint8Array(blocksize)
-
-    for(var i = 0; i < blocksize; i++) {
-        ipad[i] = key[i] ^ 0x36
-        opad[i] = key[i] ^ 0x5C
-    }
-
-    this._hash = this._createHash().update(ipad)
+function createSha256Hmac(key) {
+    if (!key.buffer) { key = convert.arrayify(key); }
+    return new hash.hmac(hash.sha256, key);
 }
 
-Hmac.prototype.update = function (data, enc) {
-    this._hash.update(data, enc)
-    return this;
+function createSha512Hmac(key) {
+    if (!key.buffer) { key = convert.arrayify(key); }
+    return new hash.hmac(hash.sha512, key);
 }
 
-Hmac.prototype.digest = function (enc) {
-    var h = this._hash.digest()
-    return this._createHash().update(this._opad).update(h).digest(enc)
-}
-
-module.exports = Hmac
+module.exports = {
+    createSha256Hmac: createSha256Hmac,
+    createSha512Hmac: createSha512Hmac,
+};

utils/index.js

@@ -7,9 +7,11 @@ var address = require('./address.js');
 var bigNumber = require('./bignumber.js');
 var contractAddress = require('./contract-address.js');
 var convert = require('./convert.js');
+var hmac = require('./hmac.js');
 var keccak256 = require('./keccak256.js');
 var sha256 = require('./sha2.js').sha256;
 var randomBytes = require('./random-bytes.js');
+var pbkdf2 = require('./pbkdf2.js');
 var properties = require('./properties.js');
 var rlp = require('./rlp.js');
 var utf8 = require('./utf8.js');
@@ -61,5 +63,8 @@ module.exports = {
     keccak256: keccak256,
     sha256: sha256,
 
+    hmac: hmac,
+    pbkdf2: pbkdf2,
+
     randomBytes: randomBytes,
 }

utils/package.json

@@ -10,7 +10,6 @@
     "bn.js": "^4.4.0",
     "hash.js": "^1.0.0",
     "js-sha3": "0.5.7",
-    "rlp": "2.0.0",
     "xmlhttprequest": "1.8.0"
   },
   "browser": {