


Converting Mcrypt to OpenSSL Encryption
Mcrypt, a legacy encryption library, has seen its retirement due to security vulnerabilities and the emergence of OpenSSL as the industry standard. While switching from Mcrypt to OpenSSL may seem daunting, it can be simplified by understanding the key differences and adopting appropriate strategies.
Cipher and Padding Disparity
Blowfish, the cipher you're using, requires data padding for encryption. OpenSSL employs PKCS#7 padding, while Mcrypt utilizes PKCS#5. PKCS#7 requires a minimum padding length of 1, while PKCS#5 accepts 0. This difference affects the encrypted results obtained from each library.
IV Usage
In ECB mode, which you're employing, an initialization vector (IV) is not required. However, this is not the case in other encryption modes. Ensure you set the IV length to 0 when using OpenSSL for ECB mode.
Encryption and Decryption
To decrypt data encrypted with Mcrypt using OpenSSL, manual padding with PKCS#7 is required prior to encryption. This ensures compatibility between the two libraries.
Example Code
The provided code demonstrates the key differences and proper padding techniques:
$key = "anotherpassword1"; $str = "does it work 12"; // Mcrypt padding $enc = mcrypt_encrypt(MCRYPT_BLOWFISH, $key, $str."", MCRYPT_MODE_ECB); // OpenSSL padding $enc = openssl_encrypt($str, 'bf-ecb', $key, true); // Decrypt using both methods $dec_mcrypt = mcrypt_decrypt(MCRYPT_BLOWFISH, $key, $enc, MCRYPT_MODE_ECB); $dec_openssl = openssl_decrypt($enc, 'bf-ecb', $key, true); echo bin2hex($enc) . PHP_EOL; var_dump($dec_mcrypt); echo PHP_EOL; var_dump($dec_openssl);
This code demonstrates successful encryption and decryption using both Mcrypt and OpenSSL, applying PKCS#7 padding for compatibility.
The above is the detailed content of How to Convert Mcrypt Encryption to OpenSSL Encryption: A Step-by-Step Guide. For more information, please follow other related articles on the PHP Chinese website!

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

PHP logging is essential for monitoring and debugging web applications, as well as capturing critical events, errors, and runtime behavior. It provides valuable insights into system performance, helps identify issues, and supports faster troubleshoot

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

Laravel simplifies HTTP verb handling in incoming requests, streamlining diverse operation management within your applications. The method() and isMethod() methods efficiently identify and validate request types. This feature is crucial for building

The Storage::download method of the Laravel framework provides a concise API for safely handling file downloads while managing abstractions of file storage. Here is an example of using Storage::download() in the example controller:


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Atom editor mac version download
The most popular open source editor

Dreamweaver Mac version
Visual web development tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 English version
Recommended: Win version, supports code prompts!
