攻防世界CTF-simple

攻防世界CTF-simple_js

1、题目的样子，要输入密码

2、随便输了下，回车后

3、直接F12看看源码先

function dechiffre(pass_enc) {
    var pass = "70,65,85,88,32,80,65,83,83,87,79,82,68,32,72,65,72,65";
    var tab = pass_enc.split(',');
    var tab2 = pass.split(',');
    var i, j, k, l = 0,
    m, n, o, p = "";
    i = 0;
    j = tab.length;
    k = j + (l) + (n = 0);
    n = tab2.length;
    for (i = (o = 0); i < (k = j = n); i++) {
        o = tab[i - l];
        p += String.fromCharCode((o = tab2[i]));
        if (i == 5) break;
    }
    for (i = (o = 0); i < (k = j = n); i++) {
        o = tab[i - l];
        if (i > 5 && i < k - 1) p += String.fromCharCode((o = tab2[i]));
    }
    p += String.fromCharCode(tab2[17]);
    pass = p;
    return pass;
}
String["fromCharCode"](("x35x35x2cx35x36x2cx35x34x2cx37x39x2cx31x31x35x2cx36x39x2cx31x31x34x2cx31x31x36x2cx31x30x37x2cx34x39x2cx35x30"));

h = window.prompt('Enter password');
alert(dechiffre(h));