jquery.base64.js

/**

* jQuery BASE64 functions

*

* <code>

* Encodes the given data with base64.

* String $.base64Encode ( String str )

* <br />

* Decodes a base64 encoded data.

* String $.base64Decode ( String str )

* </code>

*

* Encodes and Decodes the given data in base64.

* This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.

* Base64-encoded data takes about 33% more space than the original data.

* This javascript code is used to encode / decode data using base64 (this encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean). Script is fully compatible with UTF-8 encoding. You can use base64 encoded data as simple encryption mechanism.

* If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag).

* This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin.

*

* Example

* Code

* <code>

* $.base64Encode("I'm Persian.");

* </code>

* Result

* <code>

* "SSdtIFBlcnNpYW4u"

* </code>

* Code

* <code>

* $.base64Decode("SSdtIFBlcnNpYW4u");

* </code>

* Result

* <code>

* "I'm Persian."

* </code>

*

* @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >

* @link http://www.semnanweb.com/jquery-plugin/base64.html

* @see http://www.webtoolkit.info/

* @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]

* @param {jQuery} {base64Encode:function(input))

* @param {jQuery} {base64Decode:function(input))

* @return string

*/

(function($){

var keyString = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

var uTF8Encode = function(string) {

string = string.replace(/\x0d\x0a/g, "\x0a");

var output = "";

for (var n = 0; n < string.length; n++) {

var c = string.charCodeAt(n);

if (c < 128) {

output += String.fromCharCode(c);

} else if ((c > 127) && (c < 2048)) {

output += String.fromCharCode((c >> 6) | 192);

output += String.fromCharCode((c & 63) | 128);

} else {

output += String.fromCharCode((c >> 12) | 224);

output += String.fromCharCode(((c >> 6) & 63) | 128);

output += String.fromCharCode((c & 63) | 128);

}

}

return output;

};

var uTF8Decode = function(input) {

var string = "";

var i = 0;

var c = c1 = c2 = 0;

while ( i < input.length ) {

c = input.charCodeAt(i);

if (c < 128) {

string += String.fromCharCode(c);

i++;

} else if ((c > 191) && (c < 224)) {

c2 = input.charCodeAt(i+1);

string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));

i += 2;

} else {

c2 = input.charCodeAt(i+1);

c3 = input.charCodeAt(i+2);

string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));

i += 3;

}

}

return string;

}

$.extend({

base64Encode: function(input) {

var output = "";

var chr1, chr2, chr3, enc1, enc2, enc3, enc4;

var i = 0;

input = uTF8Encode(input);

while (i < input.length) {

chr1 = input.charCodeAt(i++);

chr2 = input.charCodeAt(i++);

chr3 = input.charCodeAt(i++);

enc1 = chr1 >> 2;

enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);

enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);

enc4 = chr3 & 63;

if (isNaN(chr2)) {

enc3 = enc4 = 64;

} else if (isNaN(chr3)) {

enc4 = 64;

}

output = output + keyString.charAt(enc1) + keyString.charAt(enc2) + keyString.charAt(enc3) + keyString.charAt(enc4);

}

return output;

},

base64Decode: function(input) {

var output = "";

var chr1, chr2, chr3;

var enc1, enc2, enc3, enc4;

var i = 0;

input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

while (i < input.length) {

enc1 = keyString.indexOf(input.charAt(i++));

enc2 = keyString.indexOf(input.charAt(i++));

enc3 = keyString.indexOf(input.charAt(i++));

enc4 = keyString.indexOf(input.charAt(i++));

chr1 = (enc1 << 2) | (enc2 >> 4);

chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);

chr3 = ((enc3 & 3) << 6) | enc4;

output = output + String.fromCharCode(chr1);

if (enc3 != 64) {

output = output + String.fromCharCode(chr2);

}

if (enc4 != 64) {

output = output + String.fromCharCode(chr3);

}

}

output = uTF8Decode(output);

return output;

}

});

})(jQuery);