smarcet / JOSE4PHP

        if (is_null($this->jwk))

            throw new JWEInvalidRecipientKeyException;

        if($this->jwk->getAlgorithm()->getValue()!== $this->header->getAlgorithm()->getString())

            throw new InvalidJWKAlgorithm

            (

                sprintf

                (

                    'mismatch between algorithm intended for use with the key %s and the cryptographic algorithm used to encrypt or determine the value of the CEK %s',

                    $this->jwk->getAlgorithm()->getValue(),

                    $this->header->getAlgorithm()->getString()

                )

            );

        $recipient_public_key     = $this->jwk->getKey(JSONWebKeyKeyOperationsValues::EncryptContent);

        if (!$this->should_decrypt) return $this;

        if($this->jwk->getAlgorithm()->getValue()!== $this->header->getAlgorithm()->getString())

            throw new InvalidJWKAlgorithm

            (

                sprintf

                (

                    'mismatch between algorithm intended for use with the key %s and the cryptographic algorithm used to encrypt or determine the value of the CEK %s',

                    $this->jwk->getAlgorithm()->getValue(),

                    $this->header->getAlgorithm()->getString()

                )

            );

        $key_management_algorithm = KeyManagementAlgorithms_Registry::getInstance()->get

        (