sha512: add sha512 from sha.js

Author: dcousens

create-hmac.js

@@ -1,7 +1,7 @@
 var createHash = require('./create-hash')
 
-var blocksize = 64
-var zeroBuffer = new Buffer(blocksize); zeroBuffer.fill(0)
+var zeroBuffer = new Buffer(128)
+zeroBuffer.fill(0)
 
 module.exports = Hmac
 
@@ -10,6 +10,8 @@ function Hmac (alg, key) {
   this._opad = opad
   this._alg = alg
 
+  var blocksize = (alg === 'sha512') ? 128 : 64
+
   key = this._key = !Buffer.isBuffer(key) ? new Buffer(key) : key
 
   if(key.length > blocksize) {

index.js

@@ -29,7 +29,7 @@ function each(a, f) {
 }
 
 exports.getHashes = function () {
-  return ['sha1', 'sha256', 'md5', 'rmd160']
+  return ['sha1', 'sha256', 'sha512', 'md5', 'rmd160']
 
 }
 

readme.markdown

@@ -11,8 +11,8 @@ in pure javascript so that it can run in the browser.
 
 Here is the subset that is currently implemented:
 
-* createHash (sha1, sha256, md5, rmd160)
-* createHmac (sha1, sha256, md5)
+* createHash (sha1, sha256, sha512, md5, rmd160)
+* createHmac (sha1, sha256, sha512, md5)
 * pbkdf2
 * pbkdf2Sync
 * randomBytes