Merge remote-tracking branch 'upstream/master'

1 files changed, 109 insertions, 0 deletions

diff --git a/library/cryptojs/components/enc-base64.js b/library/cryptojs/components/enc-base64.js
new file mode 100644
index 000000000..739f4a845
--- /dev/null
+++ b/library/cryptojs/components/enc-base64.js
@@ -0,0 +1,109 @@
+/*
+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_enc = C.enc;
+
+    /**
+     * Base64 encoding strategy.
+     */
+    var Base64 = C_enc.Base64 = {
+        /**
+         * Converts a word array to a Base64 string.
+         *
+         * @param {WordArray} wordArray The word array.
+         *
+         * @return {string} The Base64 string.
+         *
+         * @static
+         *
+         * @example
+         *
+         *     var base64String = CryptoJS.enc.Base64.stringify(wordArray);
+         */
+        stringify: function (wordArray) {
+            // Shortcuts
+            var words = wordArray.words;
+            var sigBytes = wordArray.sigBytes;
+            var map = this._map;
+
+            // Clamp excess bits
+            wordArray.clamp();
+
+            // Convert
+            var base64Chars = [];
+            for (var i = 0; i < sigBytes; i += 3) {
+                var byte1 = (words[i >>> 2]       >>> (24 - (i % 4) * 8))       & 0xff;
+                var byte2 = (words[(i + 1) >>> 2] >>> (24 - ((i + 1) % 4) * 8)) & 0xff;
+                var byte3 = (words[(i + 2) >>> 2] >>> (24 - ((i + 2) % 4) * 8)) & 0xff;
+
+                var triplet = (byte1 << 16) | (byte2 << 8) | byte3;
+
+                for (var j = 0; (j < 4) && (i + j * 0.75 < sigBytes); j++) {
+                    base64Chars.push(map.charAt((triplet >>> (6 * (3 - j))) & 0x3f));
+                }
+            }
+
+            // Add padding
+            var paddingChar = map.charAt(64);
+            if (paddingChar) {
+                while (base64Chars.length % 4) {
+                    base64Chars.push(paddingChar);
+                }
+            }
+
+            return base64Chars.join('');
+        },
+
+        /**
+         * Converts a Base64 string to a word array.
+         *
+         * @param {string} base64Str The Base64 string.
+         *
+         * @return {WordArray} The word array.
+         *
+         * @static
+         *
+         * @example
+         *
+         *     var wordArray = CryptoJS.enc.Base64.parse(base64String);
+         */
+        parse: function (base64Str) {
+            // Shortcuts
+            var base64StrLength = base64Str.length;
+            var map = this._map;
+
+            // Ignore padding
+            var paddingChar = map.charAt(64);
+            if (paddingChar) {
+                var paddingIndex = base64Str.indexOf(paddingChar);
+                if (paddingIndex != -1) {
+                    base64StrLength = paddingIndex;
+                }
+            }
+
+            // Convert
+            var words = [];
+            var nBytes = 0;
+            for (var i = 0; i < base64StrLength; i++) {
+                if (i % 4) {
+                    var bits1 = map.indexOf(base64Str.charAt(i - 1)) << ((i % 4) * 2);
+                    var bits2 = map.indexOf(base64Str.charAt(i)) >>> (6 - (i % 4) * 2);
+                    words[nBytes >>> 2] |= (bits1 | bits2) << (24 - (nBytes % 4) * 8);
+                    nBytes++;
+                }
+            }
+
+            return WordArray.create(words, nBytes);
+        },
+
+        _map: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
+    };
+}());