README

Simple crypt/decrypt utility

Installation

To install the package, you can use Composer:

composer require jdz/crypt

Requirements

• PHP 8.1 or higher
• Composer for dependency management

Usage

Basic Example

use JDZ\Crypt\Crypt;
use JDZ\Crypt\SimpleCipher;
use JDZ\Crypt\Key;

// Create a key
$key = new Key('my-secret-passphrase');

// Create cipher and crypt instances
$cipher = new SimpleCipher();
$crypt = new Crypt($cipher, $key);

// Encrypt
$originalText = 'Secret message';
$encrypted = $crypt->encrypt($originalText);

// Decrypt
$decrypted = $crypt->decrypt($encrypted);

echo $decrypted; // Output: Secret message

Available Ciphers

The library provides three cipher implementations:

1. SimpleCipher - Uses the passphrase directly as the encryption key
2. Md5Cipher - Uses MD5 hash of the passphrase (32 characters)
3. Sha1Cipher - Uses SHA1 hash of the passphrase (40 characters)

All ciphers use XOR-based encryption and extend from SimpleCipher.

Key Generation

You can generate keys automatically using the generator classes:

use JDZ\Crypt\SimpleGenerator;
use JDZ\Crypt\Md5Generator;
use JDZ\Crypt\Sha1Generator;

// Simple generator
$generator = new SimpleGenerator();
$key = $generator->generateKey();

// MD5 generator
$md5Generator = new Md5Generator();
$md5Key = $md5Generator->generateKey();

// SHA1 generator
$sha1Generator = new Sha1Generator();
$sha1Key = $sha1Generator->generateKey();

Manual Key Creation

use JDZ\Crypt\Key;

// Single key (public and private are the same)
$key = new Key('my-passphrase');

// Separate public and private keys
$key = new Key('public-key', 'private-key');

Examples

The examples/ directory contains:

• simple.php - Basic usage with SimpleCipher and key generation
• md5.php - MD5-based encryption with auto-generated and manual keys
• sha1.php - SHA1-based encryption with auto-generated and manual keys
• comparison.php - Comparison of all cipher types
• benchmark.php - Performance comparison and timing benchmarks

Run an example:

php examples/simple.php
php examples/md5.php
php examples/sha1.php

Compare and benchmark:

php examples/comparison.php
php examples/benchmark.php

Testing

Run Tests

Run all tests:

composer test
# or
vendor/bin/phpunit

Run tests with coverage report (HTML):

composer test-coverage
# Coverage report will be generated in the coverage/ directory

Test Structure

Tests are located in the tests/ directory and follow the PSR-4 autoloading standard under the JDZ\Crypt\Tests namespace.

• KeyTest.php - Tests for the Key class
• SimpleCipherTest.php - Tests for the SimpleCipher implementation
• CryptTest.php - Tests for the main Crypt class

License

This project is licensed under the MIT License - see the LICENSE file for details.