1 files changed, 10 insertions, 2 deletions
diff --git a/Services/PrincipalProvider.cs b/Services/PrincipalProvider.cs
index 0c35007..d37e8c0 100644
--- a/Services/PrincipalProvider.cs
+++ b/Services/PrincipalProvider.cs
@@ -8,6 +8,9 @@ public interface IPrincipalProvider {
     public IGroup[] GetGroups(IPrincipal principal);
     public IGroup[] GetGroups(IPrincipal principal, bool recurse);
 
+    public IGroup[] GetGroups(SecurityIdentifier sid);
+    public IGroup[] GetGroups(SecurityIdentifier sid, bool recurse);
+
     public bool ValidatePassword(IUser user, string password);
 }
 
@@ -16,8 +19,13 @@ public abstract class PrincipalProvider : IPrincipalProvider {
     public abstract IUser? GetUser(string name);
     public abstract IGroup? GetGroup(string name);
 
-    public IGroup[] GetGroups(IPrincipal principal) => GetGroups(principal, false);
-    public abstract IGroup[] GetGroups(IPrincipal principal, bool recurse);
+    public IGroup[] GetGroups(IPrincipal principal) =>
+        GetGroups(principal.Sid, false);
+    public IGroup[] GetGroups(IPrincipal principal, bool recurse) =>
+        GetGroups(principal.Sid, recurse);
+
+    public IGroup[] GetGroups(SecurityIdentifier sid) => GetGroups(sid, false);
+    public abstract IGroup[] GetGroups(SecurityIdentifier sid, bool recurse);
 
     public abstract bool ValidatePassword(IUser user, string password);
 }