I have created the following method in a custom Active Directory RoleProvider:
public override string[] GetRolesForUser(string username)
{
ArrayList results = new ArrayList();
using (var principalContext = new PrincipalContext(
ContextType.Domain, null, domainContainer))
{
var user = UserPrincipal.FindByIdentity(
principalContext, IdentityType.SamAccountName, username);
foreach (string acceptibleGroup in GroupsToInclude)
{
GroupPrincipal adGroup = GroupPrincipal.FindByIdentity(
principalContext, acceptibleGroup);
if (user.IsMemberOf(adGroup))
results.Add(acceptibleGroup);
}
}
return results.ToArray(typeof(string)) as string[];
}
It only checks against a white list of roles which are used in my application. The problem is that if the user is not a member of one of the roles, I get a PrincipalOperationException
when the
if (user.IsMemberOf(adGroup))
line is executed. I would expect this to simply return `false if the user is not in the group. What is going wrong here?
EDIT:
As and aside, if I call user.GetAuthorizationGroups()
and attempt to loop through the results, I get a COMException - The specified directory service attribute or value does not exist.