*
 * @author mbechler
 */
public interface SMBSigningDigest {

    /**
     * Performs MAC signing of the SMB. This is done as follows.
     * The signature field of the SMB is overwritten with the sequence number;
     * The MD5 digest of the MAC signing key + the entire SMB is taken;
     * The first 8 bytes of this are placed in the signature field.
     *
     * @param data
     *            The data.

        byte[] dst = new byte[15]; // Increased buffer size to accommodate offset + 8 bytes
        int offset = 3; // start in the middle to ensure no tail is overwritten
        int bytesWritten = cmd.writeParametersWireFormat(dst, offset);
        assertEquals(8, bytesWritten, "writeParametersWireFormat should write 8 bytes");

        assertEquals(0, responseLength);
    }

    @Test
    void testMultipleReadDataWireFormatCalls() throws SMBProtocolDecodingException {
        // Test multiple calls to readDataWireFormat to ensure buffer is overwritten
        byte[] firstData = "First data set".getBytes();
        byte[] secondData = "Second data set".getBytes();
        byte[] buffer1 = new byte[100];
        byte[] buffer2 = new byte[100];

    void encodeCopiesAndReportsSize(byte[] src, int off, int len, int dstIndex) {
        Encodable enc = new ByteEncodable(src, off, len);

        // Destination has guard space to verify non-overwritten regions.
        byte[] dst = new byte[dstIndex + len + 5];
        Arrays.fill(dst, (byte) 0x55);

        // Act
        int written = enc.encode(dst, dstIndex);

    /**
     * Verify that decode invokes NdrBuffer.dec_ndr_short.
     */
    @Test
    void decodeWithSpiedBufferCallsDecMethod() throws NdrException {
        NdrShort ns = new NdrShort(0); // value will be overwritten
        // Pre-populate buffer with the encoding of a short value
        NdrBuffer prepare = new NdrBuffer(new byte[10], 0);
        prepare.enc_ndr_short(0x34); // Encode value 0x34

        void testDecodeZero() throws NdrException {
            // Given: NdrShort and mock returning zero
            NdrShort ndrShort = new NdrShort(100); // Initial value should be overwritten
            when(mockBuffer.dec_ndr_short()).thenReturn(0);

            // When: Decoding the value
            ndrShort.decode(mockBuffer);

            // Then: Should update value to zero

            String content = new String(in.readAllBytes(), "UTF-8");
            assertEquals(initialContent, content, "Initial content should match");
        }

        // Overwrite with new content
        String newContent = "New overwritten content that is longer";
        try (OutputStream out = file.openOutputStream(false)) {
            out.write(newContent.getBytes("UTF-8"));
        }

        // Verify new content

        assertEquals("value1", data.getValues("key")[0]);

        // Second operation (overwrite)
        data.putValue("key", "value2");
        assertEquals("value2", data.getValues("key")[0]);
        assertEquals(1, data.getValues("key").length);

        // Third operation with array (overwrite)
        data.putValues("key", new String[] { "value3", "value4", "value5" });

        }

        /**
         * Checks if the overwrite option is enabled in the configuration.
         * Returns true if "overwrite" is present in the values.
         *
         * @return true if overwriting is enabled, false otherwise
         */
        public boolean isOverwrite() {
            for (final String value : values) {
                if ("overwrite".equalsIgnoreCase(value)) {
                    return true;

     * aka OPEN_ALWAYS
     */

    static final int FILE_OPEN_IF = 0x3;

    /* Open the file and overwrite it's contents or fail if it does not exist
     * aka TRUNCATE_EXISTING
     */

    static final int FILE_OVERWRITE = 0x4;

    /* Open the file and overwrite it's contents or create it if it does not exist
     * aka CREATE_ALWAYS (according to the wire when calling CreateFile)
     */