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@@ -0,0 +1,122 @@
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+//1.加密解密方法使用:
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+
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+//1.加密
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+// var str = '124中文内容';
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+// var base = new Base64();
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+// var result = base.encode(str);
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+// //document.write(result);
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+
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+// //2.解密
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+// var result2 = base.decode(result);
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+// document.write(result2);
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+// //2.加密、解密算法封装:
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+
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+function Base64() {
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+
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+ // private property
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+ var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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+
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+ // public method for encoding
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+ this.encode = function (input) {
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+ if (!input) { //console.log('请传入要加密的值')
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+ return
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+ }
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+ var output = "";
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+ var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
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+ var i = 0;
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+ input = _utf8_encode(input);
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+ while (i < input.length) {
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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) + _keyStr.charAt(enc2) +
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+ _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
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+ }
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+ return output;
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+ }
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+
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+ // public method for decoding
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+ this.decode = function (input) {
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+ if (!input) { //console.log('请传入要解密的值')
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+ return
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+ }
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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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+ input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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+ while (i < input.length) {
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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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+ }
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+ output = _utf8_decode(output);
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+ return output;
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+ }
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+
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+ // private method for UTF-8 encoding
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+ var _utf8_encode = function (string) {
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+ string = string.replace(/\r\n/g, "\n");
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+ var utftext = "";
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+ for (var n = 0; n < string.length; n++) {
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+ var c = string.charCodeAt(n);
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+ if (c < 128) {
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+ utftext += String.fromCharCode(c);
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+ } else if ((c > 127) && (c < 2048)) {
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+ utftext += String.fromCharCode((c >> 6) | 192);
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+ utftext += String.fromCharCode((c & 63) | 128);
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+ } else {
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+ utftext += String.fromCharCode((c >> 12) | 224);
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+ utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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+ utftext += String.fromCharCode((c & 63) | 128);
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+ }
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+ }
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+ return utftext;
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+ }
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+ // private method for UTF-8 decoding
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+ var _utf8_decode = function (utftext) {
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+ var string = "";
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+ var i = 0;
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+ let c = 0, c1 = 0, c2 = 0;
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+ while (i < utftext.length) {
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+ c = utftext.charCodeAt(i);
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+ if (c < 128) {
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+ string += String.fromCharCode(c);
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+ i++;
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+ } else if ((c > 191) && (c < 224)) {
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+ c2 = utftext.charCodeAt(i + 1);
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+ string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
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+ i += 2;
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+ } else {
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+ c2 = utftext.charCodeAt(i + 1);
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+ c1 = utftext.charCodeAt(i + 2);
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+ string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c1 & 63));
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+ i += 3;
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+ }
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+ }
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+ return string;
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+ }
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+}
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+export default Base64
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+
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