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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): Tue Jul 25 17:42:55 CEST 2017 on sn-devel-144
In future we have get more backends that can negotiate other backends,
we should keep all of them even if we require kerberos.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This makes it easier to spot problems with all the abstraction and async layers.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
The name is not ideal as someone might think we will panic and abort the
process. So rename it to gensec_spnego_reset_sub_sec().
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This adds and uses the gensec_spnego_neg_loop() abstraction, which
abstracts start, step and finish hooks.
The start hook does the initial processing on the incoming paket and
may start the first possible subcontext. It indicates that
gensec_update() is required on the subcontext by returning
NT_STATUS_MORE_PROCESSING_REQUIRED and return something useful in
'in_next'. Note that 'in_mem_ctx' is just passed as a hint, the
caller should treat 'in_next' as const and don't attempt to free the
content. NT_STATUS_OK indicates the finish hook should be invoked
directly withing the need of gensec_update() on the subcontext.
Every other error indicates an error that's returned to the caller.
The step hook processes the result of a failed gensec_update() and
can decide to ignore a failure or continue the negotiation by
setting up the next possible subcontext. It indicates that
gensec_update() is required on the subcontext by returning
NT_STATUS_MORE_PROCESSING_REQUIRED and return something useful in
'in_next'. Note that 'in_mem_ctx' is just passed as a hint, the
caller should treat 'in_next' as const and don't attempt to free the
content. NT_STATUS_OK indicates the finish hook should be invoced
directly withing the need of gensec_update() on the subcontext.
Every other error indicated an error that's returned to the caller.
The finish hook processes the result of a successful gensec_update()
(NT_STATUS_OK or NT_STATUS_MORE_PROCESSING_REQUIRED). It forms the
response pdu that will be returned from the toplevel gensec_update()
together with NT_STATUS_OK or NT_STATUS_MORE_PROCESSING_REQUIRED. It
may also alter the state machine to prepare receiving the next pdu
from the peer.
This is the start of using this abstraction for the initial client or server
start with on empty input token from the peer.
This abstraction will be applied to all four other spnego states,
gensec_spnego_{client,server}_negToken{Init,Targ}() in the following
commits.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
gensec_spnego_server_response() is never called with a fatal error anymore.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
It doesn't make sense to produce an output token without
returning OK or MORE_PROCESSING_REQUIRED.
Even in v4-0-test we had gensec_spnego_update_wrapper()
which only passed the constructed output token to the caller
with OK or MORE_PROCESSING_REQUIRED.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
If we wait for the mechListMIC from the server we should send a valid paket
instead of an empty blob.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This avoids print two debug message for the same failure.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This removes a useless indentation level and simplifies future patches.
Check with git show -w
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This will simplify the diff of future patches.
Check with git show -w
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
We should do the return first, that will simplify further changes.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
For now we keep doing sync processing only, in future
we'll do some preprocessing before a gensec_update_send()
on the subcontext in gensec_spnego_update_pre()
and handle the the result of gensec_update_recv()
in gensec_spnego_update_post().
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Now we finally have a logic that someone can understand while reading it.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Check with 'git show -w -U45' and carefully check the 'break' vs. 'continue'
changes.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
gensec_spnego_parse_negTokenInit() is only used as server now.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
