packages/ssoinabox-webui/root/usr/local/share/ssoinabox/htdocs/res/base64.js
author Dan Fuhry <dan@enanocms.org>
Sat, 23 Feb 2013 14:26:38 -0500
changeset 9 f4bf6556fb9f
parent 4 2212b2ded8bf
permissions -rw-r--r--
Merged
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var keyStr = "ABCDEFGHIJKLMNOP" +
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       "QRSTUVWXYZabcdef" +
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       "ghijklmnopqrstuv" +
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       "wxyz0123456789+/" +
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       "=";
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var Base64 = {
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	encode: function (input) {
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			input = escape(input);
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			var output = "";
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			var chr1, chr2, chr3 = "";
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			var enc1, enc2, enc3, enc4 = "";
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			var i = 0;
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			do {
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				chr1 = input.charCodeAt(i++);
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				chr2 = input.charCodeAt(i++);
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				chr3 = input.charCodeAt(i++);
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				enc1 = chr1 >> 2;
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				enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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				enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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				enc4 = chr3 & 63;
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				if (isNaN(chr2)) {
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					enc3 = enc4 = 64;
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				} else if (isNaN(chr3)) {
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					enc4 = 64;
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				}
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				output = output +
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				   keyStr.charAt(enc1) +
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				   keyStr.charAt(enc2) +
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				   keyStr.charAt(enc3) +
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				   keyStr.charAt(enc4);
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				chr1 = chr2 = chr3 = "";
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				enc1 = enc2 = enc3 = enc4 = "";
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			} while (i < input.length);
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			return output;
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		}
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	, decode : function (input) {
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			var output = "";
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			var chr1, chr2, chr3 = "";
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			var enc1, enc2, enc3, enc4 = "";
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			var i = 0;
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			// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
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			var base64test = /[^A-Za-z0-9\+\/\=]/g;
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			if (base64test.exec(input)) {
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			alert("There were invalid base64 characters in the input text.\n" +
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			      "Valid base64 characters are A-Z, a-z, 0-9, '+', '/',and '='\n" +
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			      "Expect errors in decoding.");
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			}
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			input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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			do {
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				enc1 = keyStr.indexOf(input.charAt(i++));
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				enc2 = keyStr.indexOf(input.charAt(i++));
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				enc3 = keyStr.indexOf(input.charAt(i++));
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				enc4 = keyStr.indexOf(input.charAt(i++));
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				chr1 = (enc1 << 2) | (enc2 >> 4);
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				chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
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				chr3 = ((enc3 & 3) << 6) | enc4;
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				output = output + String.fromCharCode(chr1);
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				if (enc3 != 64) {
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					output = output + String.fromCharCode(chr2);
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				}
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				if (enc4 != 64) {
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					output = output + String.fromCharCode(chr3);
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				}
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				chr1 = chr2 = chr3 = "";
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				enc1 = enc2 = enc3 = enc4 = "";
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			} while (i < input.length);
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			return unescape(output);
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		}
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}