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src/js/lib/cryptojs/sha224.js

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+/*
+CryptoJS v3.1.2
+code.google.com/p/crypto-js
+(c) 2009-2013 by Jeff Mott. All rights reserved.
+code.google.com/p/crypto-js/wiki/License
+*/
+(function () {
+    // Shortcuts
+    var C = CryptoJS;
+    var C_lib = C.lib;
+    var WordArray = C_lib.WordArray;
+    var C_algo = C.algo;
+    var SHA256 = C_algo.SHA256;
+
+    /**
+     * SHA-224 hash algorithm.
+     */
+    var SHA224 = C_algo.SHA224 = SHA256.extend({
+        _doReset: function () {
+            this._hash = new WordArray.init([
+                0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
+                0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4
+            ]);
+        },
+
+        _doFinalize: function () {
+            var hash = SHA256._doFinalize.call(this);
+
+            hash.sigBytes -= 4;
+
+            return hash;
+        }
+    });
+
+    /**
+     * Shortcut function to the hasher's object interface.
+     *
+     * @param {WordArray|string} message The message to hash.
+     *
+     * @return {WordArray} The hash.
+     *
+     * @static
+     *
+     * @example
+     *
+     *     var hash = CryptoJS.SHA224('message');
+     *     var hash = CryptoJS.SHA224(wordArray);
+     */
+    C.SHA224 = SHA256._createHelper(SHA224);
+
+    /**
+     * Shortcut function to the HMAC's object interface.
+     *
+     * @param {WordArray|string} message The message to hash.
+     * @param {WordArray|string} key The secret key.
+     *
+     * @return {WordArray} The HMAC.
+     *
+     * @static
+     *
+     * @example
+     *
+     *     var hmac = CryptoJS.HmacSHA224(message, key);
+     */
+    C.HmacSHA224 = SHA256._createHmacHelper(SHA224);
+}());