*            7-byte "raw" DES key
     * @return 8-byte DES key with parity
     */
    static byte[] des7to8 ( byte[] key ) {
        byte key8[] = new byte[8];
        key8[ 0 ] = (byte) ( key[ 0 ] & 0xFE );
        key8[ 1 ] = (byte) ( ( key[ 0 ] << 7 ) | ( ( key[ 1 ] & 0xFF ) >>> 1 ) );
        key8[ 2 ] = (byte) ( ( key[ 1 ] << 6 ) | ( ( key[ 2 ] & 0xFF ) >>> 2 ) );

        (byte) 0x00, (byte) 0x00
    };

    public static final byte[] SMB2_HEADER = {
        (byte) 0xFE, (byte) 'S', (byte) 'M', (byte) 'B', // ProtocolId
        (byte) 64, (byte) 0x00, // StructureSize (LE)
        (byte) 0x00, (byte) 0x00, // CreditCharge (reserved 2.0.2)
        (byte) 0x00, (byte) 0x00, // ChannelSequence

             * 00SSFSMB
             * 0 - 0's
             * S - size of payload
             * FSMB - 0xFF SMB magic #
             */

            if ( this.sbuf[ 0 ] == (byte) 0x00 && this.sbuf[ 4 ] == (byte) 0xFE && this.sbuf[ 5 ] == (byte) 'S' && this.sbuf[ 6 ] == (byte) 'M'
                    && this.sbuf[ 7 ] == (byte) 'B' ) {
                this.smb2 = true;
                // also read the rest of the header