117 lines
2.8 KiB
JavaScript
117 lines
2.8 KiB
JavaScript
var keyStr = "3WiPZ+xr/yKf5OdQ6UATHYItebL8B0njk192cJRNagGm7hoECvFVpqw4DsMlzuXS=";
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//将Ansi编码的字符串进行Base64编码
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function encode64(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 + keyStr.charAt(enc1) + keyStr.charAt(enc2)
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+ keyStr.charAt(enc3) + 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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//将Base64编码字符串转换成Ansi编码的字符串
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function decode64(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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if (input.length % 4 != 0) {
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return "";
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}
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var base64test = /[^A-Za-z0-9\+\/\=]/g;
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if (base64test.exec(input)) {
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return "";
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}
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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 += String.fromCharCode(chr2);
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}
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if (enc4 != 64) {
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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 output;
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}
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function utf16to8(str) {
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var out, i, len, c;
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out = "";
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len = str.length;
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for(i = 0; i < len; i++) {
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c = str.charCodeAt(i);
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if ((c >= 0x0001) && (c <= 0x007F)) {
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out += str.charAt(i);
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} else if (c > 0x07FF) {
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out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
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out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
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out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
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} else {
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out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
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out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
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}
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}
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return out;
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}
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function utf8to16(str) {
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var out, i, len, c;
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var char2, char3;
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out = "";
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len = str.length;
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i = 0;
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while(i < len) {
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c = str.charCodeAt(i++);
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switch(c >> 4) {
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case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
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// 0xxxxxxx
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out += str.charAt(i-1);
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break;
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case 12: case 13:
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// 110x xxxx 10xx xxxx
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char2 = str.charCodeAt(i++);
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out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
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break;
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case 14:
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// 1110 xxxx 10xx xxxx 10xx xxxx
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char2 = str.charCodeAt(i++);
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char3 = str.charCodeAt(i++);
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out += String.fromCharCode(((c & 0x0F) << 12) |
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((char2 & 0x3F) << 6) |
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((char3 & 0x3F) << 0));
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break;
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}
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}
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return out;
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}
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//
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//var de = encode64(utf16to8("source"));
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//document.writeln(de+"<br>");
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//var ee = utf8to16(decode64(de))
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//document.writeln(ee);
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//
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//-->
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