Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Noel Power <noel.power@suse.com>

EnumDomainUsers currently takes too long, significantly slowing down
calls to winbind's getpwent which is a core unix API. The time is taken
up by a GUID lookup for every record in the cached result. The advantages
of this approach are:
1. It meets the specified requirement that if a record yet to be returned
	by a search in progress (with a resume handle) is deleted or
	modified, the future returned results correctly reflect the
	new changes.
2. Memory footprint for a search in progress is only 16 bytes per record.

But, those benefits are not worth the significant performance hit
of the lookups, so this patch changes the function to run the search
and cache the RIDs and names of all records matching the search when
the request is made. This makes the memory footprint around 200 bytes
per record or up to 2MB per concurrent search for a 100k user database.
The speedup achieved by this change is around 50%, and in tandem with
some winbindd improvements as part of the same task has achieved around
15x speedup for getpwent.

The lost specification compliance is unlikely to cause a problem for any
known usage of this RPC call.

Signed-off-by: Aaron Haslett <aaronhaslett@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

Signed-off-by: Guenther Deschner <gd@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Thu Aug  1 16:59:02 UTC 2019 on sn-devel-184

This can be a generic test that can be used for more auth_levels.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

This can be a generic test that can be used for more auth_levels.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

We still want to return DOES_NOT_EXIST when request_filter is not 0.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13922

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

We still want to return DOES_NOT_EXIST when request_filter is not 0.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13922

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Add tests for the number of domain users, groups and aliases returned by
QueryDomainInfo.

These tests revealed that the existing code was not checking the
returned elements to ensure they were part of the domain.

Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Important things are this:
- It's not required to use the bind time feature negotiation in order
  to use it, it's only a hint for the client, but nothing is really
  negotiated, unlike the request multiplexing with the
  DCERPC_PFC_FLAG_CONC_MPX.
- There's special handling related to AUTH_LEVEL_CONNECT
  and requests without auth trailer
- An security context is identified by the unique
  tuple of auth_type, auth_level and auth_context_id (all together!),
  not just the auth_context_id.
- There's a limit of 2049 explicit authentication contexts.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=7113
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11892

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

BUG: https://bugzilla.samba.org/show_bug.cgi?id=7113
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11892

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>