Encrypt and Decrypt Data Using Keys

 

Crypto is a package by Spatie that allows you to easily generate public/private key pairs and then encrypt/decrypt messages using those keys. While dealing with complex ideas under-the-hood, this package provides a clean and simple interface over PHP’s openssl_* functions:

use Spatie\Crypto\Rsa\KeyPair;

use Spatie\Crypto\Rsa\PrivateKey;

use Spatie\Crypto\Rsa\PublicKey;

// generating an RSA key pair

[$privateKey, $publicKey] = (new KeyPair())->generate();

// when passing paths, the generated keys will be written those paths

(new KeyPair())->generate($pathToPrivateKey, $pathToPublicKey);

$data = 'my secret data';

$privateKey = PrivateKey::fromFile($pathToPrivateKey);

$encryptedData = $privateKey->encrypt($data); // returns something unreadable

$publicKey = PublicKey::fromFile($pathToPublicKey);

$decryptedData = $publicKey->decrypt($encryptedData); // returns 'my secret data'

You can also determine if the data can be decrypted and verify data as well:

// Can decrypt?

PrivateKey::fromFile($pathToPrivateKey)->canDecrypt($data); // returns a boolean;

PublicKey::fromFile($pathToPublicKey)->canDecrypt($data); // returns a boolean;

$signature = PrivateKey::fromFile($pathToPrivateKey)->sign('my message'); // returns a string

$publicKey = PublicKey::fromFile($pathToPublicKey);

$publicKey->verify('my message', $signature) // returns true;

$publicKey->verify('my modified message', $signature) // returns false;

You can learn more about this package, get full installation instructions, and view the source code on GitHub at spatie/crypto. Freek Van der Herten also wrote about this package on his blog.