/**
     * Gets the principal associated with this handle
     * @return the principal or null if not authenticated
     */
    public Principal getPrincipal() {
        if (this instanceof DcerpcPipeHandle) {
            return ((DcerpcPipeHandle) this).pipe.getPrincipal();
        }
        return null;
    }

    @Override
    public String toString() {
        return binding.toString();
    }

            String url = "smb1://user:pass@server/share/file.txt";
            SmbFile smbFile = new SmbFile(url, mockAuth);
            assertNotNull(smbFile);
            assertEquals(mockAuth, smbFile.getPrincipal());
            assertEquals("server", smbFile.getServer());
            assertEquals("share", smbFile.getShare());
        }

        @Test
        public void testConstructorWithMalformedUrl() {

            final SID[] sids = new SID[rpc.sids.num_sids];

            final String origin_server = handle.getServer();
            final NtlmPasswordAuthentication origin_auth = (NtlmPasswordAuthentication) handle.getPrincipal();

            for (int i = 0; i < sids.length; i++) {
                sids[i] = new SID(rpc.sids.sids[i].sid, 0, null, null, false);
                sids[i].origin_server = origin_server;

     * Returns the {@code NtlmPasswordAuthentication} object used as
     * credentials with this file or pipe. This can be used to retrieve the
     * username for example:
     * {@code
     * String username = f.getPrincipal().getName();
     * }
     * The {@code Principal} object returned will never be {@code null}
     * however the username can be {@code null} indication anonymous
     * credentials were used (e.g. some IPC$ services).