dst[dstIndex + 2 * i + 1] = (byte) (((tmp[i] & 0xF0) >> 4) + 0x41);
            dst[dstIndex + 2 * i + 2] = (byte) ((tmp[i] & 0x0F) + 0x41);
        }
        for (; i < 15; i++) {
            dst[dstIndex + 2 * i + 1] = (byte) 0x43;
            dst[dstIndex + 2 * i + 2] = (byte) 0x41;
        }
        dst[dstIndex + TYPE_OFFSET] = (byte) (((this.hexCode & 0xF0) >> 4) + 0x41);

                dst[dstIndex + 2 * i + 2] = (byte) ((tmp[i] & 0x0F) + 0x41);
            }
            for (; i < 15; i++) {
                dst[dstIndex + 2 * i + 1] = (byte) 0x43;
                dst[dstIndex + 2 * i + 2] = (byte) 0x41;
            }
            dst[dstIndex + TYPE_OFFSET] = (byte) (((hexCode & 0xF0) >> 4) + 0x41);

     */
    static Stream<Arguments> encodeProvider() {
        return Stream.of(Arguments.of(new byte[0], ""), Arguments.of(new byte[] { (byte) 0x41 }, "QQ=="), // "A"
                Arguments.of(new byte[] { (byte) 0x41, (byte) 0x42 }, "QUI="), // "AB"
                Arguments.of("Man".getBytes(), "TWFu"), // 3 bytes, no padding

    public void testReadSid() throws IOException, PACDecodingException {
        // A simple SID: S-1-1-0
        byte[] data = new byte[] { 0x01, 0x00, 0x00, 0x00, // sidSize = 1
                0x01, // revision
                0x01, // sub-authority count
                0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // authority
                0x00, 0x00, 0x00, 0x00 // sub-authority 1
        };
        PacDataInputStream pdis = createInputStream(data);

0x2e, 0x1, 0x6, 0xc5, 0x1, 0x4b, 0x82, 0xa4, 0x54, 0x79, 0x70, 0x65, 0x1, 0xa5, 0x56, 0x32, 0x4f, 0x62, 0x6a, 0xde, 0x0, 0x11, 0xa2, 0x49, 0x44, 0xc4, 0x10, 0xe6, 0xb4, 0xa8, 0xe0, 0xc6, 0x3d, 0x40, 0x7a, 0x87, 0x61, 0xf2, 0x43, 0x41, 0xdf, 0xcb, 0x93, 0xa4, 0x44, 0x44, 0x69, 0x72, 0xc4, 0x10, 0xfd, 0x76, 0xe, 0x16, 0xfc, 0x17, 0x4d, 0x38, 0xbc, 0xac, 0x18, 0xde, 0x36, 0xae, 0xd7, 0x48, 0xa6, 0x45, 0x63, 0x41, 0x6c, 0x67, 0x6f, 0x1, 0xa3, 0x45, 0x63, 0x4d, 0x4, 0xa3, 0x45, 0x63, 0x4e, 0x4, 0xa7, 0x45,...

        // Encode "TEST" (0x54 0x45 0x53 0x54)
        // T=0x54: upper nibble 0x5->F(0x46), lower nibble 0x4->E(0x45)
        src[1] = 'F';
        src[2] = 'E'; // T
        // E=0x45: upper nibble 0x4->E(0x45), lower nibble 0x5->F(0x46)
        src[3] = 'E';
        src[4] = 'F'; // E
        // S=0x53: upper nibble 0x5->F(0x46), lower nibble 0x3->D(0x44)
        src[5] = 'F';
        src[6] = 'D'; // S

        assertTrue(output1.contains(" 00 01 02 03"));
        assertTrue(output1.contains("|"));

        // Test with less than 16 bytes
        baos.reset();
        byte[] data2 = { 0x41, 0x42, 0x43, 0x44 }; // "ABCD"
        Hexdump.hexdump(ps, data2, 0, 4);
        String output2 = baos.toString();

        assertNotNull(output2);
        assertTrue(output2.contains("00000:"));

        src[srcIndex + 53] = 0x04; // flags: active

        // MAC address (6 bytes)
        byte[] testMac = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 };
        System.arraycopy(testMac, 0, src, srcIndex + 55, 6);

        // Statistics (6 bytes)
        byte[] stats = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
        System.arraycopy(stats, 0, src, srcIndex + 61, 6);

    @DisplayName("Should implement equals correctly")
    void testEquals() {
        byte[] testBytes1 = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10 };
        byte[] testBytes2 = Arrays.copyOf(testBytes1, 16);
        byte[] testBytes3 = new byte[] { 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20 };

    class FragmentFlagTests {

        @Test
        @DisplayName("DCERPC_FIRST_FRAG should have correct value")
        void testDcerpcFirstFrag() {
            assertEquals(0x01, DcerpcConstants.DCERPC_FIRST_FRAG, "DCERPC_FIRST_FRAG should be 0x01");
        }

        @Test
        @DisplayName("DCERPC_LAST_FRAG should have correct value")
        void testDcerpcLastFrag() {