标题有点夸张,呵呵!
请问这段代码是用什么加密的,怎么解密呢?能告诉详细的方法吗?
<?php /* This encoding is for evaluation purpose only. It will expire in 7 days and could manifest random failures after 7 days*/ if(!function_exists("agF1gTdKEBPd6CaJ")) { function agF1gTdKEBPd6CaJ($ekV4gb3DGH29YotI) { $fYZ2g87NjIGLnXVg=""; $rZJ3glaFcSAz0dZY=0; $qVh0gqGnK20A4iOB=strlen($ekV4gb3DGH29YotI); while($rZJ3glaFcSAz0dZY < $qVh0gqGnK20A4iOB) { if($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY] == ' ') { $fYZ2g87NjIGLnXVg.=" "; } else if($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY] == '!') { $fYZ2g87NjIGLnXVg.=chr((ord($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY+1])-ord('A'))*16+(ord($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY+2])-ord('a'))); $rZJ3glaFcSAz0dZY+=2; } else { $fYZ2g87NjIGLnXVg.=chr(ord($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY])+1); } $rZJ3glaFcSAz0dZY++; } return $fYZ2g87NjIGLnXVg; } }eval(agF1gTdKEBPd6CaJ('du`k!Ci`fE0fScJDAOc5B`I!Ci&!CbBdqrwjc ; %ngli%9 !Cb@j!CbBdglbcvqcm ; %!Cb=!Fn!Cb>T!Cb<_!Cb=]!Cb<U!Cb>[!Cb<Y!Cb@Z]!Cb=U!Cb;^!Cb>W!Cb;`z!Cb=U!Cb;^!Cb=`!Cb;!Fnz!Cb=U!Cb;^!Cb;`!Cb@!Fnz!Cb=S!Cb<`!Cb=X!Cb>]!Cb<[!Cb;T!Cb<W!Cb@Tz!Cb<R!Cb=Z!Cb>W!Cb<Q!Cb=_!Cb?S!Cb=[!Cb;^%9 &((:')); ?>
请问这段代码是用什么加密的,怎么解密呢?能告诉详细的方法吗?
<?php /* This encoding is for evaluation purpose only. It will expire in 7 days and could manifest random failures after 7 days*/ if(!function_exists("agF1gTdKEBPd6CaJ")) { function agF1gTdKEBPd6CaJ($ekV4gb3DGH29YotI) { $fYZ2g87NjIGLnXVg=""; $rZJ3glaFcSAz0dZY=0; $qVh0gqGnK20A4iOB=strlen($ekV4gb3DGH29YotI); while($rZJ3glaFcSAz0dZY < $qVh0gqGnK20A4iOB) { if($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY] == ' ') { $fYZ2g87NjIGLnXVg.=" "; } else if($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY] == '!') { $fYZ2g87NjIGLnXVg.=chr((ord($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY+1])-ord('A'))*16+(ord($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY+2])-ord('a'))); $rZJ3glaFcSAz0dZY+=2; } else { $fYZ2g87NjIGLnXVg.=chr(ord($ekV4gb3DGH29YotI[$rZJ3glaFcSAz0dZY])+1); } $rZJ3glaFcSAz0dZY++; } return $fYZ2g87NjIGLnXVg; } }eval(agF1gTdKEBPd6CaJ('du`k!Ci`fE0fScJDAOc5B`I!Ci&!CbBdqrwjc ; %ngli%9 !Cb@j!CbBdglbcvqcm ; %!Cb=!Fn!Cb>T!Cb<_!Cb=]!Cb<U!Cb>[!Cb<Y!Cb@Z]!Cb=U!Cb;^!Cb>W!Cb;`z!Cb=U!Cb;^!Cb=`!Cb;!Fnz!Cb=U!Cb;^!Cb;`!Cb@!Fnz!Cb=S!Cb<`!Cb=X!Cb>]!Cb<[!Cb;T!Cb<W!Cb@Tz!Cb<R!Cb=Z!Cb>W!Cb<Q!Cb=_!Cb?S!Cb=[!Cb;^%9 &((:')); ?>
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怎么个不行法? echo 出来的内容是什么?函数名,变量名都没关系, 是sadfsadfdsafdf也好,是a也好, 都是一样的
只有eval的内容是最后执行的内容把eval的内容代替eval的语句,就可一样运行,如果还有eval,再重复上面步骤.
忘记了明天在试下,执行后出现:
eval(agF1gTdKEBPd6CaJ('du`k!Ci`fE0fScJDAOc5B`I!Ci&!CbBdqrwjc ; %ngli%9 !Cb@j!CbBdglbcvqcm ; %!Cb=!Fn!Cb>T!Cb<_!Cb=]!Cb<U!Cb>[!Cb<Y!Cb@Z]!Cb=U!Cb;^!Cb>W!Cb;`z!Cb=U!Cb;^!Cb=`!Cb;!Fnz!Cb=U!Cb;^!Cb;`!Cb@!Fnz!Cb=S!Cb<`!Cb=X!Cb>]!Cb<[!Cb;T!Cb<W!Cb@Tz!Cb<R!Cb=Z!Cb>W!Cb<Q!Cb=_!Cb?S!Cb=[!Cb;^%9 &((:')); 这段了
再次更改eval再执行就出错了!
$i=$i++;==>eval(x('###$##i##=$##i##+##+##;'));
function x($s){
return str_replace('#','',$s);
}这就算个加密了....x你可以用任何其它可以相互转换的字符加工方式
eval(preg_replace("/^eval/",'print',$str));
eval(preg_replace("/^eval/",'print',$str));
要运行必须要把前面定义的function agF1gTdKEBPd6CaJ()加进来。而且函数名不能改。
if(!function_exists("agF1gTdKEBPd6CaJ"))
{
function agF1gTdKEBPd6CaJ($_str)
{
$_result="";
$_idx=0;
$_str_length=strlen($_str);
while($_idx < $_str_length)
{
if($_str[$_idx] == ' ')
{
$_result.=" ";
}
elseif($_str[$_idx] == '!')
{
$_result.=chr((ord($_str[$_idx+1])-ord('A'))*16+(ord($_str[$_idx+2])-ord('a'))); $_idx+=2;
}
else
{
$_result.=chr(ord($_str[$_idx])+1);
} $_idx++;
} return $_result;
}
}
$str = agF1gTdKEBPd6CaJ('du`k!Ci`fE0fScJDAOc5B`I!Ci&!CbBdqrwjc ; %ngli%9 !Cb@j!CbBdglbcvqcm ; %!Cb=!Fn!Cb>T!Cb<_!Cb=]!Cb<U!Cb>[!Cb<Y!Cb@Z]!Cb=U!Cb;^!Cb>W!Cb;`z!Cb=U!Cb;^!Cb=`!Cb;!Fnz!Cb=U!Cb;^!Cb;`!Cb@!Fnz!Cb=S!Cb<`!Cb=X!Cb>]!Cb<[!Cb;T!Cb<W!Cb@Tz!Cb<R!Cb=Z!Cb>W!Cb<Q!Cb=_!Cb?S!Cb=[!Cb;^%9 &((:');
eval(preg_replace("/^eval/",'print',$str));
?>