try ( SmbFile f = new SmbFile(url) ) {
            Credentials creds = f.getContext().getCredentials();

            assertFalse(creds.isAnonymous());
            assertFalse(creds.isGuest());
            assertTrue(creds instanceof NtlmPasswordAuthenticator);
            NtlmPasswordAuthenticator ntcreds = (NtlmPasswordAuthenticator) creds;

            assertNotNull(ntcreds.getUsername());

            }
            catch ( UnknownHostException uhe ) {
                /*
                 * Java cannot determine the localhost. This is basically a config
                 * issue on the host. There's not much we can do about it. Just
                 * to suppress NPEs that would result we can create a possibly bogus
                 * address. Pretty sure the below cannot actually thrown a UHE tho.

                    this.lmHash = new byte[0];
                    this.ntHash = new byte[0];
                    this.capabilities &= ~SmbConstants.CAP_EXTENDED_SECURITY;
                    if ( a.isGuest() ) {
                        this.accountName = a.getUsername();
                        if ( this.isUseUnicode() )
                            this.accountName = this.accountName.toUpperCase();

        }
    }


    @Test
    // BUG #15
    // this cannot be reproduced against samba, samba always subtracts
    // 8 bytes from the output buffer length, probably to mitigate
    // against this issue
    public void testEnumBufferSize () throws IOException {
        CIFSContext ctx = getContext();
        int origBufferSize = ctx.getConfig().getMaximumBufferSize();
        // odd buffer size that does match the alignment

            this.auth.isGuest() ? this.transportContext.getConfig().getGuestPassword() : this.auth.getPassword(),
            this.auth.isGuest() ? null : this.auth.getUserDomain(),
            this.auth.isGuest() ? this.transportContext.getConfig().getGuestUsername() : this.auth.getUsername(),
            this.workstation,
            this.ntlmsspFlags,
            this.auth.isGuest() || !this.auth.isAnonymous());
    }

                localInetAddress = InetAddress.getLocalHost();
            } catch( UnknownHostException uhe ) {
                /* Java cannot determine the localhost. This is basically a config
                 * issue on the host. There's not much we can do about it. Just
                 * to suppress NPEs that would result we can create a possibly bogus
                 * address. Pretty sure the below cannot actually thrown a UHE tho.

    /**
     * @return whether these are anonymous credentials
     */
    boolean isAnonymous ();


    /**
     * @return whether these are guest credentials
     */
    boolean isGuest ();

    @Override
    public boolean isAnonymous () {
        return false;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.NtlmPasswordAuthenticator#isGuest()
     */
    @Override
    public boolean isGuest () {
        return false;
    }


    @Override
    public Kerb5Authenticator clone () {
        JAASAuthenticator auth = new JAASAuthenticator();

                    response = sessResponse;
                }

                if ( !this.getConfig().isAllowGuestFallback() && response.isLoggedInAsGuest()
                        && ! ( this.credentials.isGuest() || this.credentials.isAnonymous() ) ) {
                    throw new SmbAuthException(NtStatus.NT_STATUS_LOGON_FAILURE);
                }

        try ( SmbSessionImpl treesess = t.getSession() ) {
            if ( treesess.getCredentials().isAnonymous() || treesess.getCredentials().isGuest() ) {
                // refresh anonymous session or fallback to anonymous from guest login
                try ( SmbSessionInternal s = trans