demo.js

var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
    , _p = "W5D80NFZHAYB8EUI2T649RT2MNRMVE2O";

// c.c
function e1(t) {
    if (null == t)
        return null;
    for (var e, n, r, o, i, a, c, u = "", s = 0; s < t.length;)
        o = (e = t.charCodeAt(s++)) >> 2,
            i = (3 & e) << 4 | (n = t.charCodeAt(s++)) >> 4,
            a = (15 & n) << 2 | (r = t.charCodeAt(s++)) >> 6,
            c = 63 & r,
            isNaN(n) ? a = c = 64 : isNaN(r) && (c = 64),
            u = u + _keyStr.charAt(o) + _keyStr.charAt(i) + _keyStr.charAt(a) + _keyStr.charAt(c);
    return u
}

// c.d
function e2(t) {
    if (null == (t = _u_e(t)))
        return null;
    for (var e = "", n = 0; n < t.length; n++) {
        var r = _p.charCodeAt(n % _p.length);
        e += String.fromCharCode(t.charCodeAt(n) ^ r)
    }
    return e
}

function _u_e(t) {
    if (null == t)
        return null;
    t = t.replace(/\r\n/g, "\n");
    for (var e = "", n = 0; n < t.length; n++) {
        var r = t.charCodeAt(n);
        r < 128 ? e += String.fromCharCode(r) : r > 127 && r < 2048 ? (e += String.fromCharCode(r >> 6 | 192),
            e += String.fromCharCode(63 & r | 128)) : (e += String.fromCharCode(r >> 12 | 224),
            e += String.fromCharCode(r >> 6 & 63 | 128),
            e += String.fromCharCode(63 & r | 128))
    }
    return e
}

function get_payload(start) {
    var l = {
        payload: {
            limit: 20,
            sort: 1,
            start: start
        }
    }
    return e1(e2(JSON.stringify(l.payload)))
}

function d1(t) {
    var e, n, r, o, i, a, c = "", u = 0;
    for (t = t.replace(/[^A-Za-z0-9\+\/\=]/g, ""); u < t.length;)
        e = _keyStr.indexOf(t.charAt(u++)) << 2 | (o = _keyStr.indexOf(t.charAt(u++))) >> 4,
            n = (15 & o) << 4 | (i = _keyStr.indexOf(t.charAt(u++))) >> 2,
            r = (3 & i) << 6 | (a = _keyStr.indexOf(t.charAt(u++))),
            c += String.fromCharCode(e),
        64 != i && (c += String.fromCharCode(n)),
        64 != a && (c += String.fromCharCode(r));
    return c
}

function d2(t) {
    for (var e = "", n = 0; n < t.length; n++) {
        var r = _p.charCodeAt(n % _p.length);
        e += String.fromCharCode(t.charCodeAt(n) ^ r)
    }
    return _u_d(e)
}

function _u_d(t) {
    for (var e = "", n = 0, r = 0, o = 0, i = 0; n < t.length;)
        (r = t.charCodeAt(n)) < 128 ? (e += String.fromCharCode(r),
            n++) : r > 191 && r < 224 ? (o = t.charCodeAt(n + 1),
            e += String.fromCharCode((31 & r) << 6 | 63 & o),
            n += 2) : (o = t.charCodeAt(n + 1),
            i = t.charCodeAt(n + 2),
            e += String.fromCharCode((15 & r) << 12 | (63 & o) << 6 | 63 & i),
            n += 3);
    return e
}

function get_decrypt_data(encrypt_data) {
    var d = d1(encrypt_data),
        y = d2(d)
    return y;
}