https://amz.cx/jsl/crypt.js?d=10152240

1/*
2https://jsfiddle.net/veeresh/k0e5dtjL/
3 */
4(function(exports) {
5    "use strict";
6
7    var XORCipher = {
8        encode: function(key, data) {
9            data = xor_encrypt(key, data);
10            return b64_encode(data);
11        },
12        decode: function(key, data) {
13            data = b64_decode(data);
14            return xor_decrypt(key, data);
15        }
16    };
17
18    var b64_table = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
19
20    function b64_encode(data) {
21        var o1, o2, o3, h1, h2, h3, h4, bits, r, i = 0, enc = "";
22        if (!data) { return data; }
23        do {
24            o1 = data[i++];
25            o2 = data[i++];
26            o3 = data[i++];
27            bits = o1 << 16 | o2 << 8 | o3;
28            h1 = bits >> 18 & 0x3f;
29            h2 = bits >> 12 & 0x3f;
30            h3 = bits >> 6 & 0x3f;
31            h4 = bits & 0x3f;
32            enc += b64_table.charAt(h1) + b64_table.charAt(h2) + b64_table.charAt(h3) + b64_table.charAt(h4);
33        } while (i < data.length);
34        r = data.length % 3;
35        return (r ? enc.slice(0, r - 3) : enc) + "===".slice(r || 3);
36    }
37
38    function b64_decode(data) {
39        var o1, o2, o3, h1, h2, h3, h4, bits, i = 0, result = [];
40        if (!data) { return data; }
41        data += "";
42        do {
43            h1 = b64_table.indexOf(data.charAt(i++));
44            h2 = b64_table.indexOf(data.charAt(i++));
45            h3 = b64_table.indexOf(data.charAt(i++));
46            h4 = b64_table.indexOf(data.charAt(i++));
47            bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
48            o1 = bits >> 16 & 0xff;
49            o2 = bits >> 8 & 0xff;
50            o3 = bits & 0xff;
51            result.push(o1);
52            if (h3 !== 64) {
53                result.push(o2);
54                if (h4 !== 64) {
55                    result.push(o3);
56                }
57            }
58        } while (i < data.length);
59        return result;
60    }
61
62    function keyCharAt(key, i) {
63        return key.charCodeAt( Math.floor(i % key.length) );
64    }
65
66    function xor_encrypt(key, data) {
67        return data.split('').map(function(c, i) {
68            return c.charCodeAt(0) ^ keyCharAt(key, i);
69        });
70    }
71
72    function xor_decrypt(key, data) {
73        return data.map(function(c, i) {
74            return String.fromCharCode( c ^ keyCharAt(key, i) );
75        }).join("");
76    }
77
78    exports.XORCipher = XORCipher;
79
80})(this);