if ( !allZeros8(input, pos) ) {
            byte[] challengeBytes = new byte[8];
            System.arraycopy(input, pos, challengeBytes, 0, challengeBytes.length);
            setChallenge(challengeBytes);
        }
        pos += 8;

        if ( targetNameOff < pos + 8 || input.length < pos + 8 ) {
            // no room for Context/Reserved
            return;
        }

        if ( !allZeros8(input, pos) ) {

            throw new SmbException("Already closed");
        }

        if ( this.input != null ) {
            return this.input;
        }

        try ( SmbTreeHandleImpl th = ensureTreeConnected() ) {
            this.input = new SmbPipeInputStream(this, th);
        }
        return this.input;
    }


    /**
     * {@inheritDoc}
     *

    }

/**
 * Reads up to b.length bytes of data from this input stream into an array of bytes.
 *
 * @throws IOException if a network error occurs
 */

    public int read( byte[] b ) throws IOException {
        return read( b, 0, b.length );
    }

/**
 * Reads up to len bytes of data from this input stream into an array of bytes.
 *
 * @throws IOException if a network error occurs
 */

    /**
     * Reads up to b.length bytes of data from this input stream into an array of bytes.
     *
     * @throws IOException
     *             if a network error occurs
     */

    @Override
    public int read ( byte[] b ) throws IOException {
        return read(b, 0, b.length);
    }


    /**
     * Reads up to len bytes of data from this input stream into an array of bytes.
     *

        }
    }

    public void update( byte[] input, int offset, int len ) {
        if( log.level >= 5 ) {
            log.println( "update: " + updates + " " + offset + ":" + len );
            Hexdump.hexdump( log, input, offset, Math.min( len, 256 ));
            log.flush();
        }
        if( len == 0 ) {
            return; /* CRITICAL */
        }
        digest.update( input, offset, len );
        updates++;
    }

 *
 */
public interface SmbPipeHandle extends AutoCloseable {

    /**
     * @return the pipe
     */
    SmbPipeResource getPipe ();


    /**
     * 
     * @return this pipe's input stream
     * @throws CIFSException
     */
    InputStream getInput () throws CIFSException;


    /**
     * 
     * @return this pipe's output stream
     * @throws CIFSException
     */

            ms_usage = 8;
        case 23:
            ms_usage = 13;
        }
        return ms_usage;
    }


    public static byte[] calculateMacHMACAES ( int usage, KerberosKey baseKey, byte[] input ) throws GeneralSecurityException {
        byte[] cst = new byte[] {
            (byte) ( ( usage >> 24 ) & 0xFF ), (byte) ( ( usage >> 16 ) & 0xFF ), (byte) ( ( usage >> 8 ) & 0xFF ), (byte) ( usage & 0xFF ),
            (byte) 0x99

     *
     * @param    input    input block
     * @param    offset    start of meaningful bytes in input
     * @param    len        count of bytes in input block to consider
     */
    public void engineUpdate (byte[] input, int offset, int len) {
        // make sure we don't exceed input's allocated size/length
        if (offset < 0 || len < 0 || (long)offset + len > input.length)

    /**
     * Update digest with data
     * 
     * @param input
     * @param offset
     * @param len
     */
    public void update ( byte[] input, int offset, int len ) {
        if ( log.isTraceEnabled() ) {
            log.trace("update: " + this.updates + " " + offset + ":" + len);
            log.trace(Hexdump.toHexString(input, offset, Math.min(len, 256)));
        }
        if ( len == 0 ) {

                    }
                    break;
                default:
                    input.append( (char)c );
                    break;
            }
        }

        if ((c == -1) && (input.length() == 0)) {
            return null;
        }

        return input.toString();
    }

    public final String readUTF() throws SmbException {
        int size = readUnsignedShort();