static final int CMD_OFFSET        = 4;
    static final int ERROR_CODE_OFFSET = 5;
    static final int FLAGS_OFFSET      = 9;
    static final int SIGNATURE_OFFSET  = 14;
    static final int TID_OFFSET        = 24;
    static final int HEADER_LENGTH     = 32;

    static final long MILLISECONDS_BETWEEN_1970_AND_1601 = 11644473600000L;
    static final TimeZone TZ = TimeZone.getDefault();

                securityProvider.wrap(buf);
            }

            tot = buf.getLength() - 24;
            off = 0;

            while (off < tot) {
                n = tot - off;

                if ((24 + n) > max_xmit) {
                    msg.flags &= ~DCERPC_LAST_FRAG;
                    n = max_xmit - 24;
                } else {
                    msg.flags |= DCERPC_LAST_FRAG;

 *
 * @return a four byte array
 */ 

    public byte[] getAddress() {    
        byte[] addr = new byte[4];

        addr[0] = (byte)(( address >>> 24 ) & 0xFF );
        addr[1] = (byte)(( address >>> 16 ) & 0xFF );
        addr[2] = (byte)(( address >>> 8 ) & 0xFF );
        addr[3] = (byte)( address & 0xFF );
        return addr;
    }

/** 

        dst[ di ] = (byte) ( ( i >> 24 ) & 0xFF );
        return 4;
    }


    /*
     * Decode integers
     */

    public static short dec_uint16be ( byte[] src, int si ) {
        return (short) ( ( ( src[ si ] & 0xFF ) << 8 ) | ( src[ si + 1 ] & 0xFF ) );
    }


    public static int dec_uint32be ( byte[] src, int si ) {

        dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );
        dst[dstIndex] = (byte)( val & 0xFF );
    }
    static void writeInt4( int val, byte[] dst, int dstIndex ) {
        dst[dstIndex++] = (byte)(( val >> 24 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 16 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );
        dst[dstIndex] = (byte)( val & 0xFF );
    }

                            UNI_ENCODING : getOEMEncoding());
        }
        setTarget(target);
        for (int i = 24; i < 32; i++) {
            if (material[i] != 0) {
                byte[] challenge = new byte[8];
                System.arraycopy(material, 24, challenge, 0, 8);
                setChallenge(challenge);
                break;
            }
        }

     */
    public boolean isPreferredMech ( ASN1ObjectIdentifier mechanism ) {
        return NtlmContext.NTLMSSP_OID.equals(mechanism);
    }


    /**
     * Computes the 24 byte ANSI password hash given the 8 byte server challenge.
     * 
     * @param tc
     * @param chlng
     * @return the hash for the given challenge
     * @throws GeneralSecurityException
     */

        dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );
        dst[dstIndex] = (byte)( val & 0xFF );
    }
    static void writeInt4( int val, byte[] dst, int dstIndex ) {
        dst[dstIndex++] = (byte)(( val >> 24 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 16 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );
        dst[dstIndex] = (byte)( val & 0xFF );
    }

                    pcr[j] = pc1m[l];
                else
                    pcr[j] = pc1m[l-28];
            }
            for ( j = 0; j < 24; ++j ) {
                if ( pcr[pc2[j]] != 0 )
                    kn[m] |= bigbyte[j];
                if ( pcr[pc2[j+24]] != 0 )
                    kn[n] |= bigbyte[j];
            }
        }
        cookey( kn, KnL );
    }

        int start = bufferIndex;
        int structureSize = SMBUtil.readInt2(buffer, bufferIndex);
        if ( structureSize != 24 ) {
            throw new SMBProtocolDecodingException("Expected structureSize = 24");
        }

        this.oplockLevel = buffer[ bufferIndex + 2 ];
        bufferIndex += 4;
        bufferIndex += 4; // Reserved2

        this.fileId = new byte[16];