public bool IsWellKnown(WellKnownSidType type)
{
WellKnownAccount acct = WellKnownAccount.LookupByType(type);
if (acct == null)
{
return(false);
}
string sid = Value;
if (acct.IsAbsolute)
{
return(sid == acct.Sid);
}
return(sid.StartsWith("S-1-5-21", StringComparison.OrdinalIgnoreCase) &&
sid.EndsWith("-" + acct.Rid, StringComparison.OrdinalIgnoreCase));
}
public SecurityIdentifier(WellKnownSidType sidType,
SecurityIdentifier domainSid)
{
WellKnownAccount acct = WellKnownAccount.LookupByType(sidType);
if (acct == null)
{
throw new ArgumentException("Unable to convert SID type: " + sidType);
}
if (acct.IsAbsolute)
{
buffer = ParseSddlForm(acct.Sid);
}
else
{
if (domainSid == null)
{
throw new ArgumentNullException("domainSid");
}
buffer = ParseSddlForm(domainSid.Value + "-" + acct.Rid);
}
}
