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虾米网今年三月所用加密解密函数

　　发布时间：2010-08-09 12:54:00　

标签：加密,解密,函数

前两天看的时候，所用的歌曲地址加密方式已变更。将以前的发出来供大家赏玩。

解密函数是从flash里面反编译出来的，加密函数是自己根据解密函数写出来的。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>从解密函数逆向出加密函数</title><script language="javascript" type="text/javascript"></script><style type="text/css"></style></head><body><input id="url" style="width:500px;" type="text" value="http://f3.xiami.net/7171/379798/01+1769503919_1269220.mp3" /><input type="button" value="测试加密解密" onclick="test()" /><pre class="code">//加密函数，从解密函数逆向得出var group = 5; //URL拆分成几组，感觉这个值应该是在服务端可调节的。function jiami(s){var temp = [];var groupSize,bot;s.indexOf('0') > -1 ? s = s.split('0').join('^') : void(0);/*if(s.indexOf('+') > -1){s = s.split('+');while(s.length){temp.push(encodeURIComponent(s.shift()));}s = temp.join('+');temp = []}else{s = encodeURIComponent(s);}*///原先使用条件和循环嵌套s.indexOf('+') > -1 ? s = encodeURIComponent(s.split('+').join('0')).split('0').join('+') : encodeURIComponent(s);//修改用转换方式实现groupSize = Math.floor(s.length / group);bot = s.length ％ group;for(var i=0;i < groupSize;++i){for(var j=0;j < group;++j){temp[j] == undefined ? temp[j] = '' : void(0);temp[j] += s.charAt(i*group+j);}}for(var i=0;i < bot;++i){temp[i] += s.charAt((groupSize*group+i));}s = group + temp.join('');return s;}</pre><pre class="code">//解密函数（从反编译某网站flash播放器得到，纯属技术爱好，绝无恶意。局部变量工具自动生成以_loc开头） function jiemi(sourceString) { var _loc9 = Number(sourceString.charAt(0)); var _loc7 = sourceString.substring(1); var _loc5 = Math.floor(_loc7.length / _loc9); var _loc6 = _loc7.length ％ _loc9; var _loc2 = new Array(); for (var _loc3 = 0; _loc3 < _loc6; ++_loc3) { if (_loc2[_loc3] == undefined) { _loc2[_loc3] = ""; } // end if _loc2[_loc3] = _loc7.substr((_loc5 + 1) * _loc3, _loc5 + 1); } // end of for for (var _loc3 = _loc6; _loc3 < _loc9; ++_loc3) { _loc2[_loc3] = _loc7.substr(_loc5 * (_loc3 - _loc6) + (_loc5 + 1) * _loc6, _loc5); } // end of for var _loc4 = ""; for (var _loc3 = 0; _loc3 < _loc2[0].length; ++_loc3) { for (var _loc1 = 0; _loc1 < _loc2.length; ++_loc1) { _loc4 = _loc4 + _loc2[_loc1].charAt(_loc3); } // end of for } // end of for _loc4 = unescape(_loc4); var _loc8 = ""; for (var _loc3 = 0; _loc3 < _loc4.length; ++_loc3) { if (_loc4.charAt(_loc3) == "^") { _loc8 = _loc8 + "0"; continue; } // end if _loc8 = _loc8 + _loc4.charAt(_loc3); } // end of for //trans ^ to 0 return (_loc8); }</pre></body></html>

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虾米网今年三月所用加密解密函数

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