search
HomeBackend DevelopmentPHP Tutorial教你如何解密 “ PHP 神盾解密工具 ”_PHP

其实对神盾解密并没有那么感兴趣,只是看到了作者把工具又加密了,感觉不爽。研究了一下,其实解密没那么复杂。

利用php_apd扩展很轻松地就这把这搞定了。只有四句代码。

<&#63;php
rename_function('gzuncompress','new_gzuncompress');
override_function('gzuncompress', '$arg', 'print(new_gzuncompress($arg)); return new_gzuncompress($arg);');
 
require_once 'decryption.php';
decryption('decryption.php');

该工具的核心代码:decryption.php

<&#63;php
function decryption($fileName) {
  /**
   * 解码函数
   * @param string $str 待解码字符串
   * @param string $flg 是否解析后解码
   * @return string   已解码字符串
   */
  function decode($str, $flg = '') {
    if($flg === '') {
      $ret = $str;
    } else {
      $ret = '&#1775;'; $i = 0; $l = strlen($str);
      while($i++ < $l) {
        $c = ord($str[$i-1]);
        $ret .= $c<245 &#63; ( $c>136 &#63; chr($c/2) : $str[$i-1] ) : "";
      }
    }
    return base64_decode($ret);
  }
   
  $err = '解码遇到错误,请联系教主处理该文件!';
  $str = file_get_contents($fileName);
  $path = pathinfo($fileName);
  $dirname = $path['dirname']; // 文件所在目录
  $baseName = $path['filename']; // 文件名
   
   
  if (preg_match('|IN_DECODE_(\w{32})|s', $str, $arr)) {
    // 防止解密自己,其实方法都已经告诉你了,自己动手解码才快乐
    $arr[1] === '761b5f52db6dff7ce91344e99dcedab7' && die("err: [-1] - 请勿试图用本工具解密本工具!");
  } else {
    die("err: [-1] - 没有发现神盾特征,你确定这是神盾加密?");
  }
   
  // 匹配代码主题部分
  // '';@\$[\x00-\xff]+\(\\'([\x00-\xff]+&#63;)\\'\.\(
  preg_match('|\'\';@\$[\x00-\xff]+\(\\\\\'([\x00-\xff]+&#63;)\\\\\'\.\(|s', $str, $arr) || die("err: [0] - ".$err);
  $code = $arr[1];
 
  // 匹配中间加密部分
  preg_match('|\(\'([\x00-\xff]+)\',\'|s', $code, $arr) || die("err: [1] - ".$err);
  $key = base64_decode(decode($arr[1], "decode"));
 
  $code = preg_replace('|\'\.[\x00-\xff]+\'\)\)\.\'|s', $key, $code);
 
  // 匹配尾部被加密代码
  preg_match('|=\'(x[\x00-\xff]+)\'\)\);|s', $str, $arr) || die("err: [2] - ".$err);
  $core = $arr[1];
 
  // 匹配验证key
  preg_match('|[\w+/=]{59}=|s', $arr[1], $arr) || die("err: [3] - ".$err);
  $key = $arr[0];
 
  $core = str_replace($key, '', $core); // 去除key
  $suffix = gzuncompress($core); // 得到 base64 的末尾部分
 
  // 解码
  $code = gzuncompress(base64_decode($code . $suffix));
 
  // 匹配干净的代码
  if (preg_match('|<!--<\&#63;php endif;\&#63;>(<\&#63;php[\r\n]{1,2}[\x00-\xff]+\&#63;>)<\&#63;php \$GLOBALS\[|s', $code, $arr)) {
    $code = $arr[1];
  }
 
  // 写到文件
  $source = $dirname . DIRECTORY_SEPARATOR . $baseName . "_source.php";
  file_put_contents($source, $code);
  die("解密成功,已经保存为: " . $source);
}

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
What are some common problems that can cause PHP sessions to fail?What are some common problems that can cause PHP sessions to fail?Apr 25, 2025 am 12:16 AM

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

How do you debug session-related issues in PHP?How do you debug session-related issues in PHP?Apr 25, 2025 am 12:12 AM

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

What happens if session_start() is called multiple times?What happens if session_start() is called multiple times?Apr 25, 2025 am 12:06 AM

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

How do you configure the session lifetime in PHP?How do you configure the session lifetime in PHP?Apr 25, 2025 am 12:05 AM

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

What are the advantages of using a database to store sessions?What are the advantages of using a database to store sessions?Apr 24, 2025 am 12:16 AM

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

How do you implement custom session handling in PHP?How do you implement custom session handling in PHP?Apr 24, 2025 am 12:16 AM

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

What is a session ID?What is a session ID?Apr 24, 2025 am 12:13 AM

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

How do you handle sessions in a stateless environment (e.g., API)?How do you handle sessions in a stateless environment (e.g., API)?Apr 24, 2025 am 12:12 AM

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software