Originality: dozens of lines of pure PHP code decrypt goto encrypted PHP single file [for learning only]

Use purpose

1.   Security testing ： Test whether the code you encrypt with network tools can be decrypted quickly .

2.   Learning reference ： Decrypt the source code you are interested in for programming learning , Or learn about encryption and decryption .

3.   Safety assessment ： Decrypt their own use of third-party source code whether there is dangerous behavior , Like the back door 、 act of espionage .

Shall not be used for

1.   Decrypt for sale ： Please respect the work of others , Not publicly 、 Stealing and selling others' intellectual property rights and other infringements .

2.   Black is produced ： Must not be used for network attacks 、 Illegal access to network data and other uses in violation of laws and regulations .

Remarks can Decrypt most encrypted content ( Incomplete ), It is enough for you to study network security analysis and decryption ideas .

<?php
// Recommended use 
//1.  Security testing ： Test whether the code you encrypt with network tools can be decrypted quickly .
//2.  Learning reference ： Decrypt the source code you are interested in for programming learning , Or learn about encryption and decryption .
//3.  Safety assessment ： Decrypt their own use of third-party source code whether there is dangerous behavior , Like the back door 、 act of espionage .
// Shall not be used for 
//1.  Decrypt for sale ： Please respect the work of others , Not publicly 、 Stealing and selling others' intellectual property rights and other infringements .
//2.  Black is produced ： Must not be used for network attacks 、 Illegal access to network data and other uses in violation of laws and regulations .
// Version Description 
//1.  fit php The single file is complete and correct goto Encrypted source code , Only for reference of decryption ideas 
 $mails = "[email protected]";
// Go to the beginning of the line goto+ Multiple letters ;
function Trimgoto($str,$stra){
$str = Trim($str);
preg_match_all('/goto.+?;/', $str, $goto);
foreach($goto[0] as $tiqu6){
$str = Trim(str_replace("@#@".$tiqu6,"","@#@".$str));
}
return $str;
}
 
// effect ： Descending by length   Replace  \ start + Escape characters of numbers and letters 
function Trimziti($str,$stra){
$str = Trim($str);
preg_match_all('/(\\\[a-zA-Z0-9_]{1,6})+/', $str, $ziti);
foreach($ziti[0] as $tiqu6){
$lans = strlen($tiqu6);
$liti[$tiqu6] = $lans;
}
arsort($liti);
$tiecho="";
$numberOfFiles = sizeOf($liti);
for($t=0;$t<$numberOfFiles;$t++){
$thisFile = each($liti);
$tiqu6 = $thisFile[0];
$tiqua = $thisFile[1];
eval("\$tsts = \"{$tiqu6}\";");
$tiqux = addslashes($tiqu6);
$str = str_replace($tiqux,$tsts,$str);
$str = str_replace($tiqu6,$tsts,$str);
}
return $str;
}
 
// Go to the beginning of the line   Multiple letters : ;
function Trimgete($str,$stra){
global $mails;
$str = Trim($str);
preg_match_all('/\w+:/', $str, $gete);
$jj=0;
foreach($gete[0] as $tiqu6){
if(stristr("@#@".$str,"@#@".$tiqu6)){
$jj++;
$str = Trim(str_replace("@#@".$tiqu6,"","@#@".$str));
}
}
if($jj>0){return $str;}else{return $mails;}
}
 
$efile = "install.txt"; // The file to decrypt   pure goto complete PHP Source code 
$code = file_get_contents($efile);
 
if (strlen($code)>10){
    $code1 = $code;
$code1 =str_replace(array('<?php','?>'),"\r\n // < ?php  or  ? > \r\n",$code1);
$code1 =str_replace(array('goto '),"\r\ngoto ",$code1);
$codes = "";
$tat0=explode("\r\n",$code1);
foreach($tat0 as $tat1){
$tat1 = Trim($tat1);
if(strlen($tat1)>0 && stristr("@".$tat1,"@goto ")){
$codo1 = Trimgoto($tat1,$stra);
$codo2 = Trimgete($codo1,$stra);
if($codo2==$mails){
$codo3 = "\$chalida .= '" . addslashes($codo1) ."<brbr>';\r\n";
$codel = str_replace($codo1,$codo3,$tat1);
$codes .= $codel."\r\n";
}else{
$codo3 = "\$chalida .= '" . addslashes($codo2) ."<brbr>';\r\n";
$codel = str_replace($codo2,$codo3,$tat1);
$codes .= $codel."\r\n";
}
}else{
$codes .= "\$chalida .= '" . addslashes($tat1) ."<brbr>';\r\n";
}
}
file_put_contents($efile.".01.txt",$codes); // Step 1 writes *.01.txt file 
eval($codes);
$chalide = $chalida;
$chalide = Trimziti($chalide,"");
$chalide = stripslashes($chalide);
$chalide = str_replace("<brbr>","\r\n",$chalide);
$chalide = str_replace("\r\n} ","\r\n}\r\n",$chalide);
file_put_contents($efile.".02.txt",$chalide); // Result write *.02.txt file 
}
// After testing and comparison , Can solve most , missing } And a small part of the code   Only for reference of decryption ideas