109 lines
3.3 KiB
JavaScript
109 lines
3.3 KiB
JavaScript
/*
|
|
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+/='
|
|
};
|
|
}());
|