}

        @Test
        @DisplayName("createEncryptionContext rejects when SMB2/3 not negotiated")
        void createEncryptionContext_rejects_noNegotiation() {
            assertThrows(SmbUnsupportedOperationException.class, () -> transport.createEncryptionContext(new byte[] { 1 }, null));
        }

        @Test
        @DisplayName("createEncryptionContext rejects pre-SMB3 dialect")

                        }
                        SmbTransportImpl transport = getTransport();
                        this.encryptionContext = transport.createEncryptionContext(this.sessionKey, this.preauthIntegrityHash);
                    } catch (CIFSException e) {
                        log.error("Failed to create encryption context", e);

     * @return encryption context
     * @throws CIFSException if encryption is not supported or fails
     */
    Smb2EncryptionContext createEncryptionContext(final byte[] sessionKey, final byte[] preauthHash) throws CIFSException {
        if (!this.smb2 || this.negotiated == null) {
            throw new SmbUnsupportedOperationException("SMB2/SMB3 required for encryption");