PHP加密文件破解代码

作者:enenba | 发表于:2016-03-24 11:11 | 分类:php源码

转自新浪博客,给了解密的很大启发,当然我有更好的方法,我不用正则都可以。以下贴出他的解密

<?php
$file = 'xxxxxx.class.php';  //要破解的文件
 
 
$fp = fopen($file, 'r');
$str = fread($fp, filesize($file));
fclose($fp);
 
copy($file, '0_'.$file);
 
$n = 1;
while($n < 10){
    $code = strdecode($str);
    if($n == 1){
        $code = str_replace("__FILE__", "'0_$file'", $code);
    }
     
    $replace = '$decode'.$n.'=trim';
    if(strpos($code, 'eval(') > 0){
        $code = str_replace('eval(', $replace.'(', $code);
    }else{
        preg_match("/@\\$(.*)\(\\$(.*),(.*)\(/isU", $code, $res);
        $code = str_replace($res[3], "'$replace", $code);
    }
     
    $code = preg_replace('/\\$(.*)=false;(.*?)\(\);/', '', $code); //上一版本
    $code = preg_replace('/\|\|@\\$(.*?)\(\);/', '|| print("ok");', $code);
     
    $code = destr($code);
    $tmp_file = 'detmp'.$n.'.php';
    file_put_contents($tmp_file, $code);
    include($tmp_file);
 
    $val = 'decode'.$n;
    $str = $$val;
     
    unlink($tmp_file);
     
    if(strpos($str, ';?>') === 0){
        $decode = $str;
        break;
    }
     
    $str = "<?php\r\n". $str;
    $n++;
}
 
 
$decode = preg_replace("/^(.*)exit\('Access Denied'\); /", "<?php\r\n", $decode);
$del = strrchr($decode, 'unset');
$decode = str_replace($del, "\r\n?>", $decode);
file_put_contents($file.'.de.php' ,$decode);
unlink('0_'.$file);
echo 'done';
 
////////////
function val_replace($code, $val, $deval){
    $code = str_replace('$'.$val.',', '$'.$deval.',', $code);
    $code = str_replace('$'.$val.';', '$'.$deval.';', $code);
    $code = str_replace('$'.$val.'=', '$'.$deval.'=', $code);
    $code = str_replace('$'.$val.'(', '$'.$deval.'(', $code);
    $code = str_replace('$'.$val.')', '$'.$deval.')', $code);
    $code = str_replace('$'.$val.'.', '$'.$deval.'.', $code);
    $code = str_replace('$'.$val.'/', '$'.$deval.'/', $code);
    $code = str_replace('$'.$val.'>', '$'.$deval.'>', $code);
    $code = str_replace('$'.$val.'<', '$'.$deval.'<', $code);
    $code = str_replace('$'.$val.'^', '$'.$deval.'^', $code);
    $code = str_replace('$'.$val.'||', '$'.$deval.'||', $code);
    $code = str_replace('($'.$val.' ', '($'.$deval.' ', $code);
    return $code;
}
 
function fmt_code($code){
    global $vals,$funs;
    preg_match_all("/\\$[0-9a-zA-Z\[\]']+(,|;)/iesU", $code, $res);
    foreach($res[0] as $v){
        $val = str_replace(array('$',',',';'), '', $v);
        $deval = destr($val, 1);
        $vals[$val] = $deval;
        $code = val_replace($code, $val, $deval);
    }
 
    preg_match_all("/\\$[0-9a-zA-Z\[\]']+=/iesU", $code, $res);
    foreach($res[0] as $v){
        $val = str_replace(array('$','='), '', $v);
        $deval = destr($val, 1);
        $vals[$val] = $deval;
        $code = val_replace($code, $val, $deval);
    }
 
    preg_match_all("/function\s[0-9a-zA-Z\[\]]+\(/iesU", $code, $res);
    foreach($res[0] as $v){
        $val = str_replace(array('function ','('), '', $v);
        $deval = destr($val, 1);
        $funs[$val] = $deval;
        $code = str_replace('function '.$val.'(', 'function '.$deval.'(', $code);
        $code = str_replace('='.$val.'(', '='.$deval.'(', $code);
        $code = str_replace('return '.$val.'(', 'return '.$deval.'(', $code);
    }
    return $code;
}
 
function strdecode($str){
    $len = strlen($str);
    $newstr = '';
    for($i=0; $i<$len; $i++){
        $n = ord($str[$i]);
        $newstr .= decode($n);
    }
    return $newstr;
}
 
function decode($dec){
    if(($dec > 126 || $dec<32) && $dec<>13 && $dec<>10){
        return '['.$dec.']';
    }else{
        return chr($dec);
    }
}
 
function destr($str, $val=0){
    $k = 0;
    $num = '';
    $n = strlen($str);
    $code = '';
    for($i=0; $i<$n; $i++){
        if($str[$i] == '[' && ($str[$i+1]==1 || $str[$i+1]==2)){
            $k = 1;
        }elseif($str[$i] == ']' && $k==1){
            $num = intval($num);
            if($val==1){
                $num = 97 + fmod($num, 25);
            }
            $code .= chr($num);
            $k = 0;
            $num = null;
        }else{
            if($k == 1){
                $num .= $str[$i];
            }else{
                $code .= $str[$i];
            }
        }
    }
    return $code;
}
?>

转自:http://blog.sina.com.cn/s/blog_438310d50101eceo.html

end

下一篇:10进制转62进制 php函数» 标签: php源码 php解密

评论: