网络信息安全攻防实验室 第四关

第5题:怎么就是不弹出key呢？

提交说明：提交前14个字符即可过关

这一关主要考的是js的驾驭能力，查看源代码发现变量a其实是一个匿名函数，而且js里面也禁用了一些常用的弹出对话框的函数，由于js是基于客户端浏览器的，所以我们把代码复制下来，美化后改成如下格式运行即可得到key

<script>
var a = function () {
var b = function (p, a, c, k, e, r) {
e = function (c) {
return (c < a ? '' : e(parseInt(c / a))) + ((c = c % a) > 35 ? String.fromCharCode(c + 29)  : c.toString(36))
};
if (!''.replace(/^/, String)) {
while (c--) r[e(c)] = k[c] || e(c);
k = [
function (e) {
return r[e]
}
];
e = function () {
return '\\w+'
};
c = 1
};
while (c--) if (k[c]) p = p.replace(new RegExp('\\b' + e(c) + '\\b', 'g'), k[c]);
return p
}('1s(1e(p,a,c,k,e,r){e=1e(c){1d(c<a?\'\':e(1p(c/a)))+((c=c%a)>1q?1f.1j(c+1k):c.1n(1o))};1g(!\'\'.1h(/^/,1f)){1i(c--)r[e(c)]=k[c]||e(c);k=[1e(e){1d r[e]}];e=1e(){1d\'\\\\w+\'};c=1};1i(c--)1g(k[c])p=p.1h(1l 1m(\'\\\\b\'+e(c)+\'\\\\b\',\'g\'),k[c]);1d p}(\'Y(R(p,a,c,k,e,r){e=R(c){S(c<a?\\\'\\\':e(18(c/a)))+((c=c%a)>17?T.16(c+15):c.12(13))};U(!\\\'\\\'.V(/^/,T)){W(c--)r[e(c)]=k[c]||e(c);k=[R(e){S r[e]}];e=R(){S\\\'\\\\\\\\w+\\\'};c=1};W(c--)U(k[c])p=p.V(Z 11(\\\'\\\\\\\\b\\\'+e(c)+\\\'\\\\\\\\b\\\',\\\'g\\\'),k[c]);S p}(\\\'G(B(p,a,c,k,e,r){e=B(c){A c.L(a)};E(!\\\\\\\'\\\\\\\'.C(/^/,F)){D(c--)r[e(c)]=k[c]||e(c);k=[B(e){A r[e]}];e=B(){A\\\\\\\'\\\\\\\\\\\\\\\\w+\\\\\\\'};c=1};D(c--)E(k[c])p=p.C(I J(\\\\\\\'\\\\\\\\\\\\\\\\b\\\\\\\'+e(c)+\\\\\\\'\\\\\\\\\\\\\\\\b\\\\\\\',\\\\\\\'g\\\\\\\'),k[c]);A p}(\\\\\\\'t(h(p,a,c,k,e,r){e=o;n(!\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\'.m(/^/,o)){l(c--)r[c]=k[c]||c;k=[h(e){f r[e]}];e=h(){f\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\w+\\\\\\\\\\\\\\\'};c=1};l(c--)n(k[c])p=p.m(q s(\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\b\\\\\\\\\\\\\\\'+e(c)+\\\\\\\\\\\\\\\'\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\b\\\\\\\\\\\\\\\',\\\\\\\\\\\\\\\'g\\\\\\\\\\\\\\\'),k[c]);f p}(\\\\\\\\\\\\\\\'1 3="6";1 4="7";1 5="";8(1 2=0;2<9;2++){5+=3+4}\\\\\\\\\\\\\\\',j,j,\\\\\\\\\\\\\\\'|u|i|b|c|d|v|x|y|j\\\\\\\\\\\\\\\'.z(\\\\\\\\\\\\\\\'|\\\\\\\\\\\\\\\'),0,{}))\\\\\\\',H,H,\\\\\\\'|||||||||||||||A||B||M||D|C|E|F||I||J|G|N|O||P|Q|K\\\\\\\'.K(\\\\\\\'|\\\\\\\'),0,{}))\\\',X,X,\\\'||||||||||||||||||||||||||||||||||||S|R|V|W|U|T|Y|13|Z|11|14|12|10|19|1a|1b|1c\\\'.14(\\\'|\\\'),0,{}))\',1t,1u,\'|||||||||||||||||||||||||||||||||||||||||||||||||||||1e|1d|1f|1g|1h|1i|1v|1s|1l||1m|1n|1o|1r|1k|1j|1q|1p|1w|1x|1y|1z\'.1r(\'|\'),0,{}))', 62, 98, '|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||return|function|String|if|replace|while|fromCharCode|29|new|RegExp|toString|36|parseInt|35|split|eval|62|75|53|var|slakfj|teslkjsdflk|for'.split('|'), 0, {
});
var d = eval(b);
alert('key is first 14 chars' + '\n'+d.substr(0,14));
}()
</script>

在控制台中运行即可得出答案