Jose\Algorithm\KeyEncryption\RSA::decryptKey PHP Méthode

    public function decryptKey(JWKInterface $key, $encrypted_key, array $header)
    {
        $this->checkKey($key);
        Assertion::true($key->has('d'), 'The key is not a private key');
        $priv = new RSAKey($key);
        if (self::ENCRYPTION_OAEP === $this->getEncryptionMode()) {
            $decrypted = JoseRSA::decrypt($priv, $encrypted_key, $this->getHashAlgorithm());
            Assertion::string($decrypted, 'Unable to decrypt the data.');
            return $decrypted;
        } else {
            $res = openssl_private_decrypt($encrypted_key, $decrypted, $priv->toPEM(), OPENSSL_PKCS1_PADDING | OPENSSL_RAW_DATA);
            Assertion::true($res, 'Unable to decrypt the data.');
            return $decrypted;
        }
    }