1/* 2 * Modified from: 3 * http://lxr.mozilla.org/mozilla/source/extensions/xml-rpc/src/nsXmlRpcClient.js#956 4 */ 5 6/* ***** BEGIN LICENSE BLOCK ***** 7 * Version: MPL 1.1/GPL 2.0/LGPL 2.1 8 * 9 * The contents of this file are subject to the Mozilla Public License Version 10 * 1.1 (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * http://www.mozilla.org/MPL/ 13 * 14 * Software distributed under the License is distributed on an "AS IS" basis, 15 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 16 * for the specific language governing rights and limitations under the 17 * License. 18 * 19 * The Original Code is Mozilla XML-RPC Client component. 20 * 21 * The Initial Developer of the Original Code is 22 * Digital Creations 2, Inc. 23 * Portions created by the Initial Developer are Copyright (C) 2000 24 * the Initial Developer. All Rights Reserved. 25 * 26 * Contributor(s): 27 * Martijn Pieters <mj@digicool.com> (original author) 28 * Samuel Sieb <samuel@sieb.net> 29 * 30 * Alternatively, the contents of this file may be used under the terms of 31 * either the GNU General Public License Version 2 or later (the "GPL"), or 32 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), 33 * in which case the provisions of the GPL or the LGPL are applicable instead 34 * of those above. If you wish to allow use of your version of this file only 35 * under the terms of either the GPL or the LGPL, and not to allow others to 36 * use your version of this file under the terms of the MPL, indicate your 37 * decision by deleting the provisions above and replace them with the notice 38 * and other provisions required by the GPL or the LGPL. If you do not delete 39 * the provisions above, a recipient may use your version of this file under 40 * the terms of any one of the MPL, the GPL or the LGPL. 41 * 42 * ***** END LICENSE BLOCK ***** */ 43 44/*jslint white: false, bitwise: false, plusplus: false */ 45/*global console */ 46 47var Base64 = { 48 49/* Convert data (an array of integers) to a Base64 string. */ 50toBase64Table : 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/', 51base64Pad : '=', 52 53encode: function (data) { 54 "use strict"; 55 var result = '', 56 chrTable = Base64.toBase64Table.split(''), 57 pad = Base64.base64Pad, 58 length = data.length, 59 i; 60 // Convert every three bytes to 4 ascii characters. 61 for (i = 0; i < (length - 2); i += 3) { 62 result += chrTable[data[i] >> 2]; 63 result += chrTable[((data[i] & 0x03) << 4) + (data[i+1] >> 4)]; 64 result += chrTable[((data[i+1] & 0x0f) << 2) + (data[i+2] >> 6)]; 65 result += chrTable[data[i+2] & 0x3f]; 66 } 67 68 // Convert the remaining 1 or 2 bytes, pad out to 4 characters. 69 if (length%3) { 70 i = length - (length%3); 71 result += chrTable[data[i] >> 2]; 72 if ((length%3) === 2) { 73 result += chrTable[((data[i] & 0x03) << 4) + (data[i+1] >> 4)]; 74 result += chrTable[(data[i+1] & 0x0f) << 2]; 75 result += pad; 76 } else { 77 result += chrTable[(data[i] & 0x03) << 4]; 78 result += pad + pad; 79 } 80 } 81 82 return result; 83}, 84 85/* Convert Base64 data to a string */ 86toBinaryTable : [ 87 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, 88 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, 89 -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63, 90 52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1, 91 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14, 92 15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1, 93 -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40, 94 41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1 95], 96 97decode: function (data, offset) { 98 "use strict"; 99 offset = typeof(offset) !== 'undefined' ? offset : 0; 100 var binTable = Base64.toBinaryTable, 101 pad = Base64.base64Pad, 102 result, result_length, idx, i, c, padding, 103 leftbits = 0, // number of bits decoded, but yet to be appended 104 leftdata = 0, // bits decoded, but yet to be appended 105 data_length = data.indexOf('=') - offset; 106 107 if (data_length < 0) { data_length = data.length - offset; } 108 109 /* Every four characters is 3 resulting numbers */ 110 result_length = (data_length >> 2) * 3 + Math.floor((data_length%4)/1.5); 111 result = new Array(result_length); 112 113 // Convert one by one. 114 for (idx = 0, i = offset; i < data.length; i++) { 115 c = binTable[data.charCodeAt(i) & 0x7f]; 116 padding = (data.charAt(i) === pad); 117 // Skip illegal characters and whitespace 118 if (c === -1) { 119 console.error("Illegal character code " + data.charCodeAt(i) + " at position " + i); 120 continue; 121 } 122 123 // Collect data into leftdata, update bitcount 124 leftdata = (leftdata << 6) | c; 125 leftbits += 6; 126 127 // If we have 8 or more bits, append 8 bits to the result 128 if (leftbits >= 8) { 129 leftbits -= 8; 130 // Append if not padding. 131 if (!padding) { 132 result[idx++] = (leftdata >> leftbits) & 0xff; 133 } 134 leftdata &= (1 << leftbits) - 1; 135 } 136 } 137 138 // If there are any bits left, the base64 string was corrupted 139 if (leftbits) { 140 throw {name: 'Base64-Error', 141 message: 'Corrupted base64 string'}; 142 } 143 144 return result; 145} 146 147}; /* End of Base64 namespace */ 148