如何确定AD组是否包含来自另一个（受信任）域的给定DirectoryEntry？

Question

我试图加强我的代码，以确定用户是否是给定AD组的成员。 它基本上有效，除非该组成员恰好来自另一个（受信任）域，因为它存储为foreignsecurityprincipal。

鉴于我有一个有效的DirectoryEntry对象，我想要测试的组和我要检查的帐户，我需要一个DirectorySearcher过滤器字符串，这将允许我确认该帐户在该组中，即使该帐户是一个外国安全主体。

（VB.NET代码示例演示了该问题）

Dim ContainerGroup as DirectoryEntry = ... Code to get Group
Dim UserToCheckFor as DirectoryEntry = ... Code to get User

DSearcher = New DirectorySearcher(ContainerGroup, "(WHATCANIPUTINHERE)", New String() {"member;Range=0-5000"}, SearchScope.Base)
DSearcher.AttributeScopeQuery = "member"

'If an object is found, the account was in the group
Return (DSearcher.FindOne() IsNot Nothing)  

Answer 1

好的。 找到了。 这是诀窍。

我试图加强我的代码，以确定用户是否是给定AD组的成员。 它基本上有效，除非该组成员恰好来自另一个（受信任）域，因为它存储为foreignsecurityprincipal。

（VB.NET代码示例）

Dim ContainerGroup as DirectoryEntry = ... Code to get Group
Dim UserToCheckFor as DirectoryEntry = ... Code to get User

DSearcher = New DirectorySearcher
Dim DSearcher As New DirectorySearcher(ContainerGroup, getLDAPQueryStringUsingSID(containedGroup), New String() {"member;Range=0-5000"}, SearchScope.Base)

Return (DSearcher.FindOne() IsNot Nothing) 


** Helper Methods **

Private Function getLDAPQueryStringUsingSID(ByVal DEObject As DirectoryEntry) As String            
  Return "(objectSid=" + getSDDLSidForDirectoryEntry(DEObject) + ")"
End Function

Private Function getSDDLSidForDirectoryEntry(ByVal DEObject As DirectoryEntry) As String
      Dim bytes As Byte() = CType(DEObject.Properties("objectSid").Value, Byte())
      Dim sid As New System.Security.Principal.SecurityIdentifier(bytes, 0)
      Return sid.ToString
End Function