/**
* Raw unauthenticated decryption (insecure on its own).
*
* @param string $ciphertext
* @param string $key
* @param string $iv
* @param string $cipherMethod
*
* @throws Ex\EnvironmentIsBrokenException
*
* @return string
*/
protected static function plainDecrypt($ciphertext, $key, $iv, $cipherMethod)
{
Core::ensureConstantExists('OPENSSL_RAW_DATA');
Core::ensureFunctionExists('openssl_decrypt');
$plaintext = \openssl_decrypt($ciphertext, $cipherMethod, $key, OPENSSL_RAW_DATA, $iv);
if ($plaintext === false) {
throw new Ex\EnvironmentIsBrokenException('openssl_decrypt() failed.');
}
return $plaintext;
}
/**
* You MUST NOT call this method directly.
*
* Unauthenticated message deryption.
*
* @param string $ciphertext
* @param string $key
* @param string $iv
* @param array $config
* @return string
* @throws Ex\CannotPerformOperationException
*/
protected static function plainDecrypt($ciphertext, $key, $iv, $config)
{
Core::ensureConstantExists("OPENSSL_RAW_DATA");
Core::ensureFunctionExists("openssl_decrypt");
$plaintext = \openssl_decrypt($ciphertext, $config->cipherMethod(), $key, OPENSSL_RAW_DATA, $iv);
if ($plaintext === false) {
throw new Ex\CannotPerformOperationException("openssl_decrypt() failed.");
}
return $plaintext;
}
