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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>
We can just use GENSEC_UPDATE_IS_NTERROR() as NT_STATUS_INVALID_PARAMETER
is mapped to NT_STATUS_MORE_PROCESSING_REQUIRED in the lines above.
Check with git show -U10
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
In the following commits we'll pass that variable from the caller
and this preparation will reduce the diff for the following patches.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
In the following commits we'll pass that variable from the caller
and this preparation will reduce the diff for the following patches.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This matches the flow already used in the client case.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This makes it easier to handle SPNEGO_FALLBACK code path completely async
from the first packet in future.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
