throw new SmbUnsupportedOperationException("Server does not support extended NTLMv2 key exchange");
                }

                if (!msg2.getFlag(NtlmFlags.NTLMSSP_NEGOTIATE_128)) {
                    throw new SmbUnsupportedOperationException("Server does not support 128-bit keys");
                }
            }

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

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

        MessageDigest dgst = switch (resp.getSelectedPreauthHash()) {

        }

        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;
        } catch (IOException e1) {