this.salt = salt != null ? salt.clone() : new byte[0];
            this.hashAlgorithm = hashAlgorithm;
            this.currentHash = new byte[HASH_SIZE_SHA512]; // Initialize with zeros
            this.isValid = true;
        }

        public byte[] getSalt() {
            return salt.clone();
        }

        public int getHashAlgorithm() {
            return hashAlgorithm;
        }

        request = new Smb2NegotiateRequest(mockConfig, 0);

        // Then
        byte[] guid = request.getClientGuid();
        assertNotNull(guid);
        assertEquals(16, guid.length);
        // Should be zeros (not set from machine ID)
        for (byte b : guid) {
            assertEquals(0, b);
        }
    }

    @Test
    @DisplayName("Should add negotiate contexts for SMB 3.1.1")

        writeInt8(0L, dst, dstIndex);
        dstIndex += 8;
        /* Samba 2.2.7 needs ATTR_NORMAL
         */
        writeInt2(0x80 | attributes, dst, dstIndex);
        dstIndex += 2;
        /* 6 zeros observed with NT */
        writeInt8(0L, dst, dstIndex);
        dstIndex += 6;

        /* Also observed 4 byte alignment but we stick
         * with the default for jCIFS which is 2 */

        message[61] = 0x00;
        message[62] = 0x00;
        message[63] = 0x00;

        // Add dummy LM response (24 zeros at offset 64)
        for (int i = 0; i < 24; i++) {
            message[64 + i] = 0;
        }

        // Add dummy NT response (24 zeros at offset 88)
        for (int i = 0; i < 24; i++) {
            message[88 + i] = 0;
        }

            assertEquals(originalMessage.getFlags(), parsedMessage.getFlags());
            assertNull(parsedMessage.getChallenge()); // Should be null if all zeros
            assertNull(parsedMessage.getTarget());
            assertNull(parsedMessage.getContext()); // Should be null if all zeros
            assertNull(parsedMessage.getTargetInformation());
        }

        @Test

            response = mock(CommonServerMessageBlock.class);
        }

        @Test
        @DisplayName("Should sign data correctly with zero signature field")
        void testSignZeroesSignatureField() {
            // Fill signature field with non-zero values
            for (int i = 0; i < SIGNATURE_LENGTH; i++) {
                data[SIGNATURE_OFFSET + i] = (byte) 0xFF;
            }

    }

    @Test
    @DisplayName("Should write zeros for reserved field")
    void testReservedFieldIsZero() {
        // Given
        Configuration mockConfig = mock(Configuration.class);
        Smb2TreeDisconnectRequest request = new Smb2TreeDisconnectRequest(mockConfig);
        byte[] buffer = new byte[256];
        // Fill with non-zero values first
        for (int i = 0; i < buffer.length; i++) {

        }

        RequestWithFileId request = new Smb2CloseRequest(mockConfig, emptyFileId);

        // All patterns should be accepted
        assertDoesNotThrow(() -> request.setFileId(allZeros), "Should handle all-zeros file ID");
        assertDoesNotThrow(() -> request.setFileId(allOnes), "Should handle all-ones file ID");
        assertDoesNotThrow(() -> request.setFileId(alternating), "Should handle alternating pattern file ID");
    }

        byte[] originalDecKey = testDecryptionKey.clone();

        // Ensure keys are not zero initially
        assertFalse(isAllZeros(originalEncKey), "Original encryption key should not be all zeros");
        assertFalse(isAllZeros(originalDecKey), "Original decryption key should not be all zeros");

        // When
        encryptionContext.secureWipeKeys();

            verify(mockNdrBuffer).advance(8); // sub_authority advance (4 * 2)
            verify(mockNdrBuffer, times(2)).derive(anyInt());

            // Verify identifier_authority bytes (5 zeros + 1 five)
            verify(mockNdrBuffer, times(5)).enc_ndr_small((byte) 0);
            verify(mockNdrBuffer).enc_ndr_small((byte) 5);

            // Verify sub_authority values