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JS eval(function(p,a,c,k,e,r){e=function(c)加、解密

1 <script>  
2 a=62;  
3 function encode() {  
4 var code = document.getElementById('code').value;  
5 code = code.replace(/[ ]+/g, '');  
6 code = code.replace(/'/g, "\'");  
7 var tmp = code.match(/ (w+) /g);  
8 tmp.sort();  
9 var dict = [];  
10 var i, t = '';  
11 for(var i=0; i<tmp.length; i++) {  
12 if(tmp[i] != tb) dict.push(t = tmp[i]);  
13 }  
14 var len = dict.length;  
15 var ch;  
16 for(i=0; i<len; i++) {  
17 ch = num(i);  
18 code = code.replace(new RegExp('\b'+dict[i]+'\b','g'), ch);  
19 if(ch == dict[i]) dict[i] = '';  
20 }  
21 document.getElementById('code').value = "eval(function(p,a,c,k,e,d){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--)d[e(c)]=k[c]||e(c);k=[function(e){return d[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}("  
22 + "'"+code+"',"+a+","+len+",'"+ dict.join('|')+"'.split('|'),0,{}))";  
23 }  
24  
25 function num(c) {  
26 return(c<a?'':num(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36));  
27 }  
28  
29 function run() {  
30 eval(document.getElementById('code').value);  
31 }  
32  
33 function decode() {  
34 var code = document.getElementById('code').value;  
35 code2 = code.replace(/^eval/, '');  
36 //alert(code);  
37 document.getElementById('code').value = eval(code2);  
38 }  
39 </script>  
40  
41 <textarea id=code cols=80 rows=20>  
42 </textarea>  
43  
44  
45 <input type=button onclick=encode() value=编码>  
46 <input type=button onclick=run() value=执行>  
47 <input type=button onclick=decode() value=解码>

 

作者:tbw
补充:综合编程 , 安全编程 ,
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