void testInt32Operations() {
        // Given
        int value = 0x12345678;
        byte[] buffer = new byte[4];

        // When - encode little endian
        Encdec.enc_uint32le(value, buffer, 0);
        long decoded = Encdec.dec_uint32le(buffer, 0);

        // Then
        assertEquals(value & 0xFFFFFFFFL, decoded);
        assertEquals(0x78, buffer[0] & 0xFF);
        assertEquals(0x56, buffer[1] & 0xFF);

        return switch (enc) {
        case TIME_1970_SEC_32BE -> new Date(dec_uint32be(src, si) * 1000L);
        case TIME_1970_SEC_32LE -> new Date(dec_uint32le(src, si) * 1000L);
        case TIME_1904_SEC_32BE -> new Date(((dec_uint32be(src, si) & 0xFFFFFFFFL) - SEC_BETWEEEN_1904_AND_1970) * 1000L);
        case TIME_1904_SEC_32LE -> new Date(((dec_uint32le(src, si) & 0xFFFFFFFFL) - SEC_BETWEEEN_1904_AND_1970) * 1000L);

        return switch (enc) {
        case TIME_1970_SEC_32BE -> new Date(dec_uint32be(src, si) * 1000L);
        case TIME_1970_SEC_32LE -> new Date(dec_uint32le(src, si) * 1000L);
        case TIME_1904_SEC_32BE -> new Date(((dec_uint32be(src, si) & 0xFFFFFFFFL) - SEC_BETWEEEN_1904_AND_1970) * 1000L);
        case TIME_1904_SEC_32LE -> new Date(((dec_uint32le(src, si) & 0xFFFFFFFFL) - SEC_BETWEEEN_1904_AND_1970) * 1000L);

        assertEquals(0, Encdec.dec_uint32le(buffer, 0)); // Should be 0 for null referent
    }

    @Test
    void testDecNdrStringInvalidConformance() {
        // Simulate a string with invalid size
        ndrBuffer.setIndex(0);
        Encdec.enc_uint32le(0xFFFF + 1, buffer, 0); // len = 0xFFFF + 1
        Encdec.enc_uint32le(0, buffer, 4);
        Encdec.enc_uint32le(0xFFFF + 1, buffer, 8);

    public void enc_ndr_string(final String s) {
        align(4);
        int i = index;
        final int len = s.length();
        Encdec.enc_uint32le(len + 1, buf, i);
        i += 4;
        Encdec.enc_uint32le(0, buf, i);
        i += 4;
        Encdec.enc_uint32le(len + 1, buf, i);
        i += 4;
        try {
            System.arraycopy(s.getBytes("UTF-16LE"), 0, buf, i, len * 2);

    public void enc_ndr_string(final String s) {
        align(4);
        int i = this.index;
        final int len = s.length();
        Encdec.enc_uint32le(len + 1, this.buf, i);
        i += 4;
        Encdec.enc_uint32le(0, this.buf, i);
        i += 4;
        Encdec.enc_uint32le(len + 1, this.buf, i);
        i += 4;
        System.arraycopy(Strings.getUNIBytes(s), 0, this.buf, i, len * 2);
        i += len * 2;

                || this.sbuf[7] != (byte) 'B') {
            throw new IOException("Houston we have a synchronization problem");
        }

        int nextCommand = Encdec.dec_uint32le(this.sbuf, 4 + 20);
        final int maximumBufferSize = getContext().getConfig().getMaximumBufferSize();
        final int msgSize = nextCommand != 0 ? nextCommand : size;
        if (msgSize > maximumBufferSize) {

            if (size < HEADER_LENGTH + 1 || 4 + size > rcv_buf_size) {
                throw new IOException("Invalid payload size: " + size);
            }
            final int errorCode = Encdec.dec_uint32le(BUF, 9) & 0xFFFFFFFF;
            if (resp.command == ServerMessageBlock.SMB_COM_READ_ANDX && (errorCode == 0 || errorCode == 0x80000005)) { // overflow indicator normal for pipe

        Encdec.enc_uint32le(0x00000101, blob, 0); // Header
        Encdec.enc_uint32le(0x00000000, blob, 4); // Reserved
        Encdec.enc_uint64le(nanos1601, blob, 8);
        System.arraycopy(clientChallenge, 0, blob, 16, 8);
        Encdec.enc_uint32le(0x00000000, blob, 24); // Unknown
        System.arraycopy(avPairs, 0, blob, 28, avPairsLength);
        Encdec.enc_uint32le(0x00000000, blob, 28 + avPairsLength);

            throw new IOException("DCERPC pipe is no longer open");
        }

        int have = this.handle.sendrecv(buf, off, length, inB, getMaxRecv());

        final int fraglen = Encdec.dec_uint16le(inB, 8);
        if (fraglen > getMaxRecv()) {
            throw new IOException("Unexpected fragment length: " + fraglen);
        }

        while (have < fraglen) {