public function McryptAES128Encryption::decrypt in Two-factor Authentication (TFA) 8

Decrypt text.

Parameters

string $text: The text to be decrypted.

string $key: The key to decrypt the text with.

Return value

string The decrypted text

Throws

\Drupal\encrypt\Exception\EncryptException Thrown when decryption fails.

\Drupal\encrypt\Exception\EncryptionMethodCanNotDecryptException The method should throw this exception when the plugin can not decrypt (i.e. use a public key).

Overrides EncryptionMethodInterface::decrypt

File

src/Plugin/EncryptionMethod/McryptAES128Encryption.php, line 81

Class

McryptAES128Encryption

Deprecated Mcrypt AES 128 encryption plugin.

Namespace

Drupal\tfa\Plugin\EncryptionMethod

Code

public function decrypt($text, $key) {
  $crypto_data = Json::decode($text);
  if (empty($crypto_data['version']) || empty($crypto_data['iv_base64']) || empty($crypto_data['ciphertext_base64'])) {

    // Backwards compatibility with the old Mcrypt scheme.
    return extension_loaded('mcrypt') ? $this
      ->decryptLegacyDataWithMcrypt($text, $key) : $this
      ->decryptLegacyDataWithOpenSsl($text, $key);
  }
  else {
    $iv = base64_decode($crypto_data['iv_base64']);
    $ciphertext = base64_decode($crypto_data['ciphertext_base64']);
    return openssl_decrypt($ciphertext, 'aes-256-cbc', $key, TRUE, $iv);
  }
}