RealAESEncryptionMethod.php in Real AES 8

Contains \Drupal\real_aes\Plugin\EncryptionMethod\RealAESEncryptionMethod.

Namespace

Drupal\real_aes\Plugin\EncryptionMethod

File

src/Plugin/EncryptionMethod/RealAESEncryptionMethod.php

<?php

/**
 * @file
 * Contains \Drupal\real_aes\Plugin\EncryptionMethod\RealAESEncryptionMethod.
 */
namespace Drupal\real_aes\Plugin\EncryptionMethod;

use Drupal\encrypt\EncryptionMethodInterface;
use Drupal\encrypt\Plugin\EncryptionMethod\EncryptionMethodBase;
use Defuse\Crypto\Crypto;
use Defuse\Crypto\Exception as Ex;

/**
 * Class RealAESEncryptionMethod.
 *
 * @EncryptionMethod(
 *   id = "real_aes",
 *   title = @Translation("Authenticated AES (Real AES)"),
 *   description = "Authenticated encryption based on AES-128 in CBC mode. Verifies ciphertext integrity via an Encrypt-then-MAC scheme using HMAC-SHA256.",
 *   key_type = {"encryption"}
 * )
 */
class RealAESEncryptionMethod extends EncryptionMethodBase implements EncryptionMethodInterface {

  /**
   * {@inheritdoc}
   */
  public function checkDependencies($text = NULL, $key = NULL) {
    $errors = array();
    if (!class_exists('\\Defuse\\Crypto\\Crypto')) {
      $errors[] = t('Defuse PHP Encryption library is not correctly installed.');
    }

    // Check if we have a 128 bit key.
    if (strlen($key) != 16) {
      $errors[] = t('This encryption method requires a 128 bit key.');
    }
    return $errors;
  }

  /**
   * {@inheritdoc}
   */
  public function encrypt($text, $key, $options = array()) {
    try {
      return Crypto::encrypt($text, $key);
    } catch (Ex\CryptoTestFailed $ex) {
      return FALSE;
    } catch (Ex\CannotPerformOperation $ex) {
      return FALSE;
    }
  }

  /**
   * {@inheritdoc}
   */
  public function decrypt($text, $key, $options = array()) {
    try {
      return Crypto::decrypt($text, $key);
    } catch (Ex\CryptoTestFailed $ex) {
      return FALSE;
    } catch (Ex\CannotPerformOperation $ex) {
      return FALSE;
    }
  }

}

Classes

Name	Description
RealAESEncryptionMethod	Class RealAESEncryptionMethod.