| | |
| | |
|
| | | function Base64() {
|
| | | |
| | | // private property
|
| | | _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
|
| | | |
| | | // public method for encoding
|
| | | this.encode = function (input) {
|
| | | var output = "";
|
| | | var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
|
| | | var i = 0;
|
| | | input = _utf8_encode(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 +
|
| | | _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
|
| | | _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
|
| | | }
|
| | | return output;
|
| | | }
|
| | | |
| | | // public method for decoding
|
| | | this.decode = 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 = _keyStr.indexOf(input.charAt(i++));
|
| | | enc2 = _keyStr.indexOf(input.charAt(i++));
|
| | | enc3 = _keyStr.indexOf(input.charAt(i++));
|
| | | enc4 = _keyStr.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 = _utf8_decode(output);
|
| | | return output;
|
| | | }
|
| | | |
| | | // private method for UTF-8 encoding
|
| | | _utf8_encode = function (string) {
|
| | | string = string.replace(/\r\n/g,"\n");
|
| | | var utftext = "";
|
| | | for (var n = 0; n < string.length; n++) {
|
| | | var c = string.charCodeAt(n);
|
| | | if (c < 128) {
|
| | | utftext += String.fromCharCode(c);
|
| | | } else if((c > 127) && (c < 2048)) {
|
| | | utftext += String.fromCharCode((c >> 6) | 192);
|
| | | utftext += String.fromCharCode((c & 63) | 128);
|
| | | } else {
|
| | | utftext += String.fromCharCode((c >> 12) | 224);
|
| | | utftext += String.fromCharCode(((c >> 6) & 63) | 128);
|
| | | utftext += String.fromCharCode((c & 63) | 128);
|
| | | }
|
| | | |
| | | }
|
| | | return utftext;
|
| | | }
|
| | | |
| | | // private method for UTF-8 decoding
|
| | | _utf8_decode = function (utftext) {
|
| | | var string = "";
|
| | | var i = 0;
|
| | | var c = c1 = c2 = 0;
|
| | | while ( i < utftext.length ) {
|
| | | c = utftext.charCodeAt(i);
|
| | | if (c < 128) {
|
| | | string += String.fromCharCode(c);
|
| | | i++;
|
| | | } else if((c > 191) && (c < 224)) {
|
| | | c2 = utftext.charCodeAt(i+1);
|
| | | string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
|
| | | i += 2;
|
| | | } else {
|
| | | c2 = utftext.charCodeAt(i+1);
|
| | | c3 = utftext.charCodeAt(i+2);
|
| | | string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
|
| | | i += 3;
|
| | | }
|
| | | }
|
| | | return string;
|
| | | }
|
| | | |
| | | function Base64() { |
| | | |
| | | // private property |
| | | _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; |
| | | |
| | | // public method for encoding |
| | | this.encode = function (input) { |
| | | var output = ""; |
| | | var chr1, chr2, chr3, enc1, enc2, enc3, enc4; |
| | | var i = 0; |
| | | input = _utf8_encode(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 + |
| | | _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + |
| | | _keyStr.charAt(enc3) + _keyStr.charAt(enc4); |
| | | } |
| | | return output; |
| | | } |
| | | |
| | | // public method for decoding |
| | | this.decode = 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 = _keyStr.indexOf(input.charAt(i++)); |
| | | enc2 = _keyStr.indexOf(input.charAt(i++)); |
| | | enc3 = _keyStr.indexOf(input.charAt(i++)); |
| | | enc4 = _keyStr.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 = _utf8_decode(output); |
| | | return output; |
| | | } |
| | | |
| | | // private method for UTF-8 encoding |
| | | _utf8_encode = function (string) { |
| | | string = string.replace(/\r\n/g,"\n"); |
| | | var utftext = ""; |
| | | for (var n = 0; n < string.length; n++) { |
| | | var c = string.charCodeAt(n); |
| | | if (c < 128) { |
| | | utftext += String.fromCharCode(c); |
| | | } else if((c > 127) && (c < 2048)) { |
| | | utftext += String.fromCharCode((c >> 6) | 192); |
| | | utftext += String.fromCharCode((c & 63) | 128); |
| | | } else { |
| | | utftext += String.fromCharCode((c >> 12) | 224); |
| | | utftext += String.fromCharCode(((c >> 6) & 63) | 128); |
| | | utftext += String.fromCharCode((c & 63) | 128); |
| | | } |
| | | |
| | | } |
| | | return utftext; |
| | | } |
| | | |
| | | // private method for UTF-8 decoding |
| | | _utf8_decode = function (utftext) { |
| | | var string = ""; |
| | | var i = 0; |
| | | var c = c1 = c2 = 0; |
| | | while ( i < utftext.length ) { |
| | | c = utftext.charCodeAt(i); |
| | | if (c < 128) { |
| | | string += String.fromCharCode(c); |
| | | i++; |
| | | } else if((c > 191) && (c < 224)) { |
| | | c2 = utftext.charCodeAt(i+1); |
| | | string += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); |
| | | i += 2; |
| | | } else { |
| | | c2 = utftext.charCodeAt(i+1); |
| | | c3 = utftext.charCodeAt(i+2); |
| | | string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); |
| | | i += 3; |
| | | } |
| | | } |
| | | return string; |
| | | } |
| | | } |