src/LightSaml/Model/Assertion/EncryptedElementReader.php
protected function decryptCipher()
    {
        $decrypted = $this->xmlEnc->decryptNode($this->symmetricKey, false);
        if (false == is_string($decrypted)) {
            throw new \LogicException('Expected decrypted string');
        }

        return $decrypted;
    }
protected function decryptCipher()
    {
        $decrypted = $this->xmlEnc->decryptNode($this->symmetricKey, false);
        if (false == is_string($decrypted)) {
            throw new \LogicException('Expected decrypted string');
        }

        return $decrypted;
    }
@return string

@throws \Exception