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<?php |
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namespace ElePHPant\Cookie\Strategies\Encryption; |
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use ElePHPant\Cookie\Exceptions\InvalidParamException; |
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/** |
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* Class AES256EncryptionStrategy |
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* |
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* Please report bugs on https://github.com/wilderamorim/cookie/issues |
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* |
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* @author Wilder Amorim <https://github.com/wilderamorim> |
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* @link https://www.linkedin.com/in/wilderamorim/ |
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*/ |
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class AES256EncryptionStrategy implements EncryptionStrategyInterface |
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{ |
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/** @var string The encryption key used for AES-256 encryption. */ |
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private string $encryptKey; |
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/** |
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* Create a new instance of AES256EncryptionStrategy. |
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* |
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* @param array $configs The configuration array. |
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*/ |
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public function __construct(array $configs) |
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{ |
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$this->boot($configs); |
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} |
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/** |
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* Encrypt a value using AES-256 encryption. |
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* |
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* @param string $value The value to encrypt. |
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* @return string The encrypted value. |
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*/ |
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public function encrypt(string $value): string |
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{ |
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$iv = random_bytes(openssl_cipher_iv_length('aes-256-cbc')); |
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$encrypted = openssl_encrypt($value, 'aes-256-cbc', $this->encryptKey, OPENSSL_RAW_DATA, $iv); |
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return base64_encode($iv . $encrypted); |
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} |
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/** |
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* Decrypt an encrypted value using AES-256 encryption. |
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* |
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* @param string $encryptedValue The encrypted value to decrypt. |
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* @return string|null The decrypted value, or null if decryption fails. |
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*/ |
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public function decrypt(string $encryptedValue): ?string |
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{ |
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$encryptedValue = base64_decode($encryptedValue, true); |
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if ($encryptedValue === false) { |
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return null; |
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} |
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$ivLength = openssl_cipher_iv_length('aes-256-cbc'); |
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$iv = substr($encryptedValue, 0, $ivLength); |
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$encrypted = substr($encryptedValue, $ivLength); |
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$decrypted = openssl_decrypt($encrypted, 'aes-256-cbc', $this->encryptKey, OPENSSL_RAW_DATA, $iv); |
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if ($decrypted === false) { |
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return null; |
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} |
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return $decrypted; |
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} |
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/** |
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* Boot the encryption strategy by setting the encryption key. |
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* |
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* @param array $configs The configuration array. |
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* @throws InvalidParamException If the encryption key is missing in the configuration. |
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*/ |
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public function boot(array $configs): void |
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{ |
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if (!in_array('encrypt_key', array_keys($configs))) { |
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throw new InvalidParamException('Encryption key is missing in params.'); |
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} |
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$this->encryptKey = $configs['encrypt_key']; |
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} |
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} |
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wilderamorim /
cookie
