README

A PHP library for cryptographic operations including symmetric, asymmetric, and hybrid encryption/decryption.

Installation

composer require hawk-hhg/hawki-crypto

Features

• Symmetric Cryptography: Encrypt and decrypt data using a shared secret key
• Asymmetric Cryptography: Public/private key encryption for secure communication
• Hybrid Cryptography: Combines symmetric and asymmetric approaches for efficient secure communication

Usage

Symmetric Encryption

use Hawk\HawkiCrypto\SymmetricCrypto;

// Create instance
$crypto = new SymmetricCrypto();

// Encrypt data
$encrypted = $crypto->encrypt("sensitive data", "your-secret-key");

// Decrypt data
$decrypted = $crypto->decrypt($encrypted, "your-secret-key");

Asymmetric Encryption

use Hawk\HawkiCrypto\AsymmetricCrypto;
use Hawk\HawkiCrypto\Value\AsymmetricKeypair;

// Create instance
$crypto = new AsymmetricCrypto();

// Generate keypair
$keypair = $crypto->generateKeypair();

// Encrypt with public key
$encrypted = $crypto->encrypt("sensitive data", $keypair->getPublicKey());

// Decrypt with private key
$decrypted = $crypto->decrypt($encrypted, $keypair);

Hybrid Encryption

use Hawk\HawkiCrypto\HybridCrypto;
use Hawk\HawkiCrypto\SymmetricCrypto;
use Hawk\HawkiCrypto\AsymmetricCrypto;
use Hawk\HawkiCrypto\Value\AsymmetricKeypair;

// Create required instances
$hybridCrypto = new HybridCrypto(new SymmetricCrypto(), new AsymmetricCrypto());

// Generate keypair
$keypair = $asymmetricCrypto->generateKeypair();

// Encrypt with public key
$encrypted = $hybridCrypto->encrypt("sensitive data", $keypair->getPublicKey());

// Decrypt with private key
$decrypted = $hybridCrypto->decrypt($encrypted, $keypair);

Value Objects

The library provides several value objects for handling cryptographic operations:

• AsymmetricKeypair: Represents a public/private key pair
• AsymmetricPublicKey: Represents a public key
• SymmetricCryptoValue: Encapsulates symmetrically encrypted data
• HybridCryptoValue: Encapsulates hybrid encrypted data

All value objects can be serialized as JSON strings for easy storage and transmission like so:

use Hawk\HawkiCrypto\AsymmetricCrypto;

$crypto = new AsymmetricCrypto();

echo json_encode($crypto->generateKeypair()); // Outputs JSON representation of the keypair

Alternatively every value object can be cast into a string and recreated from it:

use Hawk\HawkiCrypto\AsymmetricCrypto;

$crypto = new AsymmetricCrypto();
$keypair = $crypto->generateKeypair();

echo (string) $keypair; // Outputs string representation of the keypair

$keypairFromString = AsymmetricKeypair::fromString((string) $keypair); // Recreates keypair from string

Exception Handling

The library throws exceptions that implement HawkiCryptoExceptionInterface when errors occur.