@Override
        public byte[] initSecContext(byte[] token, int off, int len) throws CIFSException {
            if (token == null) {
                if (len == 0) {
                    return new byte[0];
                }
                throw new CIFSException("token is null but len > 0");
            }
            if (off < 0 || len < 0 || off > token.length || off + len > token.length) {

     *
     * @param b the byte array to read data into
     * @param off the offset in the array at which to start storing bytes
     * @param len the maximum number of bytes to read
     * @return the number of bytes read, or -1 if end of file is reached
     * @throws SmbException if an I/O error occurs
     */
    public int read(final byte b[], final int off, int len) throws SmbException {
        if (len <= 0) {
            return 0;

        int off = 0; // Offset where position should be written

        // Test with non-null source array
        int bytesWritten = NtlmMessage.writeSecurityBufferContent(dest, pos, off, src);
        assertEquals(src.length, bytesWritten, "Should return correct number of bytes written.");
        assertEquals(pos, NtlmMessage.readULong(dest, off), "Position should be written correctly at offset.");

        doAnswer(inv -> {
            byte[] b = inv.getArgument(0);
            int off = inv.getArgument(1);
            b[off] = 0x01;
            b[off + 1] = 0x02;
            b[off + 2] = 0x03;
            b[off + 3] = 0x04;
            b[off + 4] = 0x05;
            b[off + 5] = 0x06;
            b[off + 6] = 0x07;
            b[off + 7] = 0x08;
            return 8;

                response.dataLength = 1;
                // The response buffer points to the internal tmp buffer
                if (response.b != null && response.off < response.b.length) {
                    response.b[response.off] = 42; // Return byte value 42
                }
                return null;
            }
        }).when(smbFile).send(any(SmbComReadAndX.class), any(SmbComReadAndXResponse.class));

        this.b = b;
        this.off = off;
        command = SMB_COM_WRITE;
    }

    void setParam(final int fid, final long offset, final int remaining, final byte[] b, final int off, final int len) {
        this.fid = fid;
        this.offset = (int) (offset & 0xFFFFFFFFL);
        this.remaining = remaining;
        this.b = b;
        this.off = off;
        count = len;
        digest = null; /* otherwise recycled commands

        this.b = b;
        this.off = off;
    }

    /**
     * Sets the parameters for this write request.
     *
     * @param fid the file identifier
     * @param offset the file offset at which to write
     * @param remaining the number of bytes remaining to be written
     * @param b the data buffer containing bytes to write
     * @param off the offset in the buffer where data starts

        this.b = b;
        this.off = off;
        dataLength = len;
        command = SMB_COM_WRITE_ANDX;
    }

    void setParam(final int fid, final long offset, final int remaining, final byte[] b, final int off, final int len) {
        this.fid = fid;
        this.offset = offset;
        this.remaining = remaining;
        this.b = b;
        this.off = off;
        dataLength = len;

                    len -= cnt;
                    off += cnt;
                } else {
                    if (log.isTraceEnabled()) {
                        log.trace(String.format("Wrote at %d remain %d off %d len %d", this.fp, len - w, off, w));
                    }
                    this.req.setParam(fh.getFid(), this.fp, len - w, b, off, w);
                    th.send(this.req, this.rsp);

        assertEquals(remaining, getFieldValue(write, "remaining"), "Remaining should match constructor arg");
        assertEquals(buffer, getFieldValue(write, "b"), "Buffer reference should be set");
        assertEquals(off, getFieldValue(write, "off"), "Off should match constructor arg");
        assertEquals(len, getFieldValue(write, "count"), "Count should equal len");
    }

    /**
     * Test setParam method updates the write parameters
     */