ffa735caff
git-svn-id: https://beef.googlecode.com/svn/trunk@503 b87d56ec-f9c0-11de-8c8a-61c5e9addfc9
71 lines
1.6 KiB
JavaScript
71 lines
1.6 KiB
JavaScript
// Base64 code from Tyler Akins -- http://rumkin.com
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beef.encode = {};
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beef.encode.base64 = {
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keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
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encode: 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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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 + this.keyStr.charAt(enc1) + this.keyStr.charAt(enc2) + this.keyStr.charAt(enc3) + this.keyStr.charAt(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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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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do {
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enc1 = this.keyStr.indexOf(input.charAt(i++));
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enc2 = this.keyStr.indexOf(input.charAt(i++));
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enc3 = this.keyStr.indexOf(input.charAt(i++));
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enc4 = this.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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} while (i < input.length);
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return output;
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}
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}
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beef.regCmp('beef.encode.base64');
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