Question

我有2个域A和B。我在B中有一个组“ GroupInB”，其中有一个用户“ UserInB”（将来，该组中可以有很多用户）。在域A中，我创建了一个组“ GroupInA”，然后将“ GroupInB”添加到“ GroupInA”。（这将导致GroupB的ForeignSecurityPrincipal）。并且我还在“ GroupA”中添加了一个用户“ UserInA”。

现在的问题是，我想读取“ GroupA”中的所有用户。我希望结果是

UserInA
UserInB

但是当尝试从DirectoryEntry中读取用户时，我得到的只是

UserInA
GroupInB

有没有办法我也可以从“ GroupInB”获得用户？ :(

Answer 1

不久前，我写了一篇文章，介绍如何吸引小组的所有成员：Find all the members of a group

我包括了一个有关finding users from external trusted domains的部分，该部分显示为“外部安全负责人”，但是似乎我忘记了这个特定的用例：来自外部域的组是成员。因此，我更新了文章中的代码，并将其包含在下面。

这有点复杂，因为外部安全主体在外部域上具有对象的SID，但是要使用SID绑定到对象，您必须使用域的DNS名称。因此，我们首先需要为所有受信任的域创建域SID和DNS名称的映射。但是，如果仅在一个环境中运行此程序，则始终可以对一系列域进行硬编码以加快速度。

这是代码。如果您为true参数传递recursive，它将扩展所有成员组。

public static IEnumerable<string> GetGroupMemberList(DirectoryEntry group, bool recursive = false, Dictionary<string, string> domainSidMapping = null) {
    var members = new List<string>();

    group.RefreshCache(new[] { "member", "canonicalName" });

    if (domainSidMapping == null) {
        //Find all the trusted domains and create a dictionary that maps the domain's SID to its DNS name
        var groupCn = (string) group.Properties["canonicalName"].Value;
        var domainDns = groupCn.Substring(0, groupCn.IndexOf("/", StringComparison.Ordinal));

        var domain = Domain.GetDomain(new DirectoryContext(DirectoryContextType.Domain, domainDns));
        var trusts = domain.GetAllTrustRelationships();

        domainSidMapping = new Dictionary<string, string>();

        foreach (TrustRelationshipInformation trust in trusts) {
            using (var trustedDomain = new DirectoryEntry($"LDAP://{trust.TargetName}")) {
                try {
                    trustedDomain.RefreshCache(new [] {"objectSid"});
                    var domainSid = new SecurityIdentifier((byte[]) trustedDomain.Properties["objectSid"].Value, 0).ToString();
                    domainSidMapping.Add(domainSid, trust.TargetName);
                } catch (Exception e) {
                    //This can happen if you're running this with credentials
                    //that aren't trusted on the other domain or if the domain
                    //can't be contacted
                    throw new Exception($"Can't connect to domain {trust.TargetName}: {e.Message}", e);
                }
            }
        }
    }

    while (true) {
        var memberDns = group.Properties["member"];
        foreach (string member in memberDns) {
            using (var memberDe = new DirectoryEntry($"LDAP://{member.Replace("/", "\\/")}")) {
                memberDe.RefreshCache(new[] { "objectClass", "msDS-PrincipalName", "cn" });

                if (recursive && memberDe.Properties["objectClass"].Contains("group")) {
                    members.AddRange(GetGroupMemberList(memberDe, true, domainSidMapping));
                } else if (memberDe.Properties["objectClass"].Contains("foreignSecurityPrincipal")) {
                    //User is on a trusted domain
                    var foreignUserSid = memberDe.Properties["cn"].Value.ToString();
                    //The SID of the domain is the SID of the user minus the last block of numbers
                    var foreignDomainSid = foreignUserSid.Substring(0, foreignUserSid.LastIndexOf("-"));
                    if (domainSidMapping.TryGetValue(foreignDomainSid, out var foreignDomainDns)) {
                        using (var foreignMember = new DirectoryEntry($"LDAP://{foreignDomainDns}/<SID={foreignUserSid}>")) {
                            foreignMember.RefreshCache(new[] { "msDS-PrincipalName", "objectClass" });
                            if (recursive && foreignMember.Properties["objectClass"].Contains("group")) {
                                members.AddRange(GetGroupMemberList(foreignMember, true, domainSidMapping));
                            } else {
                                members.Add(foreignMember.Properties["msDS-PrincipalName"].Value.ToString());
                            }
                        }
                    } else {
                        //unknown domain
                        members.Add(foreignUserSid);
                    }
                } else {
                    var username = memberDe.Properties["msDS-PrincipalName"].Value.ToString();
                    if (!string.IsNullOrEmpty(username)) {
                        members.Add(username);
                    }
                }
            }
        }

        if (memberDns.Count == 0) break;

        try {
            group.RefreshCache(new[] {$"member;range={members.Count}-*"});
        } catch (COMException e) {
            if (e.ErrorCode == unchecked((int) 0x80072020)) { //no more results
                break;
            }
            throw;
        }
    }
    return members;
}

如何在.net中获取ForeignSecurityPrincipal对象的详细信息

1 个答案: