Php uses the N-layer encryption eval gzinflate str_rot13 base64 Cracking Method Summary

PHP uses eval (gzinflate (str_rot13 (base64_decode ('base64 encrypted content') to decrypt core code

Non-extended php encryption method:

Here is an online product, which is not bad. It's okay to defend against Trojans. It's okay to protect the code.

Write a simple decryption,

Specifically for eval. This principle is useful.

Note: This decryption program must be used on PHP5,

I tested eval (gzinflate (str_rot13 (base64_decode ('base64 encrypted content ') on PHP4 and the encrypted code cannot be decrypted normally.

 

<? Php

 

// Encrypted File Content

 

$ A = "eval (gzinflate (str_rot13 (base64_decode ('put BASE64 Code '))));";

 

Function decodephp ($ ){

 

$ Max_level = 300; // maximum number of layers

 

For ($ I = 0; $ I <$ max_level; $ I ++ ){

 

Ob_start ();

 

Eval (str_replace ('eval', 'echo ', $ ));

 

$ A = ob_get_clean ();

 

If (strpos ($ a, 'eval (gzinflate (str_rot13 (base64_decode') === false ){

 

Return $;

 

}

 

}

 

}

 

Echo decodephp ($ );

 

?>

Php uses N-layer encryption to crack eval (gzinflate (base64_decode ("codes ")

First, I declare that this is not my original, it is me