final int _domainss = _src.dec_ndr_long();
                final int _domainsi = _src.index;
                _src.advance(12 * _domainss);

                if (this.domains == null) {
                    if (_domainss < 0 || _domainss > 0xFFFF) {
                        throw new NdrException(NdrException.INVALID_CONFORMANCE);
                    }
                    this.domains = new LsarTrustInformation[_domainss];

                final int _domainss = _src.dec_ndr_long();
                final int _domainsi = _src.index;
                _src.advance(12 * _domainss);

                if (domains == null) {
                    if (_domainss < 0 || _domainss > 0xFFFF) {
                        throw new NdrException(NdrException.INVALID_CONFORMANCE);
                    }
                    domains = new LsarTrustInformation[_domainss];
                }

        if (DISABLED || auth.domain == "?") {
            return null;
        }

        if (_domains != null && System.currentTimeMillis() > _domains.expiration) {
            _domains = null;
        }
        if (_domains != null) {
            return _domains.map;
        }
        try {
            final UniAddress addr = UniAddress.getByName(auth.domain, true);

                || tf.getCredentials().getUserDomain().isEmpty()) {
            return null;
        }

        if (this._domains != null && System.currentTimeMillis() > this._domains.expiration) {
            this._domains = null;
        }
        if (this._domains != null) {
            return this._domains.map;
        }
        try {
            final String authDomain = tf.getCredentials().getUserDomain();

            }
            rpc.domains = new lsarpc.LsarRefDomainList();
            rpc.domains.count = 1;
            rpc.domains.max_count = 1;
            rpc.domains.domains = new lsarpc.LsarTrustInformation[1];
            rpc.domains.domains[0] = new lsarpc.LsarTrustInformation();
            rpc.domains.domains[0].name = new UnicodeString("", false);
            rpc.domains.domains[0].sid = new jcifs.dcerpc.rpc.sid_t();

    }

    @ParameterizedTest
    @MethodSource("domains")
    @DisplayName("getUserDomain handles null and empty")
    void getUserDomain_edges(String domain) {
        TestCredentials creds = new TestCredentials(domain, false, false, new Subject(), false);
        assertEquals(domain, creds.getUserDomain());
    }

    static Stream<String> domains() {
        return Stream.of(null, "", "SALES");
    }

            case jcifs.SID.SID_TYPE_DOMAIN:
            case jcifs.SID.SID_TYPE_ALIAS:
            case jcifs.SID.SID_TYPE_WKN_GRP:
                final rpc.unicode_string ustr = rpc.domains.domains[resp.sid_index].name;
                out.domainName = new UnicodeString(ustr, false).toString();
                break;
            }

            final UnicodeString ucstr = new UnicodeString(resp.name, false);

        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateUsername(longUsername));
    }

    @ParameterizedTest
    @DisplayName("Test valid domains")
    @ValueSource(strings = { "domain", "domain.local", "sub.domain.com", "domain-01", "domain_test" })
    void testValidDomains(String domain) {
        assertDoesNotThrow(() -> InputValidator.validateDomain(domain));

        // Act
        lookupSids = new MsrpcLookupSids(mockPolicyHandle, testSids);

        // Assert using reflection
        Field domainsField = lsarpc.LsarLookupSids.class.getDeclaredField("domains");
        domainsField.setAccessible(true);
        Object domainsObj = domainsField.get(lookupSids);

        assertNotNull(domainsObj);
        assertTrue(domainsObj instanceof lsarpc.LsarRefDomainList);
    }

            case SID_TYPE_ALIAS:
            case SID_TYPE_WKN_GRP:
                final int sid_index = rpc.names.names[si].sid_index;
                final rpc.unicode_string ustr = rpc.domains.domains[sid_index].name;
                sids[si].domainName = new UnicodeString(ustr, false).toString();
                break;
            }