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add base64 converters which aren't universal across browsers
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109
js/crypto.js
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109
js/crypto.js
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function base64_encode (data) {
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// http://kevin.vanzonneveld.net
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// + original by: Tyler Akins (http://rumkin.com)
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// + improved by: Bayron Guevara
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// + improved by: Thunder.m
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// + bugfixed by: Pellentesque Malesuada
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// + improved by: Rafa? Kukawski (http://kukawski.pl)
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// * example 1: base64_encode('Kevin van Zonneveld');
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// * returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='
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// mozilla has this native
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// - but breaks in 2.0.0.12!
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//if (typeof this.window['btoa'] === 'function') {
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// return btoa(data);
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//}
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var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
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ac = 0,
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enc = "",
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tmp_arr = [];
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if (!data) {
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return data;
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}
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do { // pack three octets into four hexets
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o1 = data.charCodeAt(i++);
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o2 = data.charCodeAt(i++);
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o3 = data.charCodeAt(i++);
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bits = o1 << 16 | o2 << 8 | o3;
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h1 = bits >> 18 & 0x3f;
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h2 = bits >> 12 & 0x3f;
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h3 = bits >> 6 & 0x3f;
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h4 = bits & 0x3f;
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// use hexets to index into b64, and append result to encoded string
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tmp_arr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
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} while (i < data.length);
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enc = tmp_arr.join('');
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var r = data.length % 3;
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return (r ? enc.slice(0, r - 3) : enc) + '==='.slice(r || 3);
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}
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function base64_decode (data) {
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// http://kevin.vanzonneveld.net
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// + original by: Tyler Akins (http://rumkin.com)
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// + improved by: Thunder.m
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// + input by: Aman Gupta
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// + bugfixed by: Onno Marsman
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// + bugfixed by: Pellentesque Malesuada
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// + input by: Brett Zamir (http://brett-zamir.me)
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// + bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// * example 1: base64_decode('S2V2aW4gdmFuIFpvbm5ldmVsZA==');
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// * returns 1: 'Kevin van Zonneveld'
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// mozilla has this native
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// - but breaks in 2.0.0.12!
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//if (typeof this.window['atob'] === 'function') {
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// return atob(data);
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//}
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var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
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ac = 0,
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dec = "",
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tmp_arr = [];
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if (!data) {
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return data;
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}
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data += '';
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do { // unpack four hexets into three octets using index points in b64
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h1 = b64.indexOf(data.charAt(i++));
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h2 = b64.indexOf(data.charAt(i++));
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h3 = b64.indexOf(data.charAt(i++));
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h4 = b64.indexOf(data.charAt(i++));
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bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
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o1 = bits >> 16 & 0xff;
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o2 = bits >> 8 & 0xff;
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o3 = bits & 0xff;
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if (h3 == 64) {
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tmp_arr[ac++] = String.fromCharCode(o1);
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} else if (h4 == 64) {
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tmp_arr[ac++] = String.fromCharCode(o1, o2);
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} else {
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tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
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}
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} while (i < data.length);
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dec = tmp_arr.join('');
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return dec;
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}
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