if ( !this.smb2 || this.negotiated == null ) {
            throw new SmbUnsupportedOperationException();
        }

        Smb2NegotiateResponse resp = (Smb2NegotiateResponse) this.negotiated;
        if ( !resp.getSelectedDialect().atLeast(DialectVersion.SMB311) ) {
            throw new SmbUnsupportedOperationException();
        }

        MessageDigest dgst;

                req = r;
            }
            else {
                if ( !th.hasCapability(SmbConstants.CAP_NT_SMBS) ) {
                    throw new SmbUnsupportedOperationException("Not supported without CAP_NT_SMBS");
                }

                /*
                 * NtTrans Notify Change Request / Response
                 */

     * @param lastAccess
     *            the last access time as milliseconds since Jan 1, 1970
     * @throws CIFSException
     * @throws jcifs.smb.SmbUnsupportedOperationException
     *             if CAP_NT_SMBS is unavailable
     */
    void setFileTimes ( long createTime, long lastModified, long lastAccess ) throws CIFSException;


    /**

        }

        try ( SmbTreeHandleImpl th = ensureTreeConnected() ) {
            if ( !th.isSMB2() && !th.hasCapability(SmbConstants.CAP_NT_SMBS) ) {
                throw new SmbUnsupportedOperationException("Not supported without CAP_NT_SMBS");
            }
            return new SmbWatchHandleImpl(openUnshared(O_RDONLY, READ_CONTROL | GENERIC_READ, DEFAULT_SHARING, 0, 1), filter, recursive);
        }
    }

                    Set<ASN1ObjectIdentifier> mechs = new HashSet<>(Arrays.asList(tok.getMechanisms()));
                    if ( !mechs.contains(NtlmContext.NTLMSSP_OID) ) {
                        throw new SmbUnsupportedOperationException("Server does not support NTLM authentication");
                    }
                }
            }
        }
        catch ( SmbException e ) {
            throw e;
        }

                    anonymous = true;
                }

                if ( ( response.getSessionFlags() & Smb2SessionSetupResponse.SMB2_SESSION_FLAG_ENCRYPT_DATA ) != 0 ) {
                    throw new SmbUnsupportedOperationException("Server requires encryption, not yet supported.");
                }

                if ( preauthIntegrity ) {
                    byte[] reqBytes = request.getRawPayload();