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samba-mirror/source3/smbd/smb2_sesssetup.c
Michael Adam 25494628a2 smbd:smb2: fix crash when smb2 session reauth fails
https://bugzilla.samba.org/show_bug.cgi?id=10208

Authentication error in smb2 session reauth invalidates
the session. In this case the session must in contrast
to successful session setup requests be torn down and live
no longer than the request.

The talloc move of the session from the global session
table to the request ensures that the session setup
reply can still be correctly signed, but subsequent
requests on the connection don't find a session any more.

Pair-Programmed-With: Jeremy Allison <jra@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Michael Adam <obnox@samba.org>
2013-10-15 11:48:19 -07:00

809 lines
24 KiB
C

/*
Unix SMB/CIFS implementation.
Core SMB2 server
Copyright (C) Stefan Metzmacher 2009
Copyright (C) Jeremy Allison 2010
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
#include "../auth/gensec/gensec.h"
#include "auth.h"
#include "../lib/tsocket/tsocket.h"
#include "../libcli/security/security.h"
#include "../lib/util/tevent_ntstatus.h"
static struct tevent_req *smbd_smb2_session_setup_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
uint64_t in_session_id,
uint8_t in_flags,
uint8_t in_security_mode,
uint64_t in_previous_session_id,
DATA_BLOB in_security_buffer);
static NTSTATUS smbd_smb2_session_setup_recv(struct tevent_req *req,
uint16_t *out_session_flags,
TALLOC_CTX *mem_ctx,
DATA_BLOB *out_security_buffer,
uint64_t *out_session_id);
static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *smb2req)
{
const uint8_t *inhdr;
const uint8_t *inbody;
uint64_t in_session_id;
uint8_t in_flags;
uint8_t in_security_mode;
uint64_t in_previous_session_id;
uint16_t in_security_offset;
uint16_t in_security_length;
DATA_BLOB in_security_buffer;
NTSTATUS status;
struct tevent_req *subreq;
status = smbd_smb2_request_verify_sizes(smb2req, 0x19);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(smb2req, status);
}
inhdr = SMBD_SMB2_IN_HDR_PTR(smb2req);
inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
in_flags = CVAL(inbody, 0x02);
in_security_mode = CVAL(inbody, 0x03);
/* Capabilities = IVAL(inbody, 0x04) */
/* Channel = IVAL(inbody, 0x08) */
in_security_offset = SVAL(inbody, 0x0C);
in_security_length = SVAL(inbody, 0x0E);
in_previous_session_id = BVAL(inbody, 0x10);
if (in_security_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req))) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
if (in_security_length > SMBD_SMB2_IN_DYN_LEN(smb2req)) {
return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
in_security_buffer.data = SMBD_SMB2_IN_DYN_PTR(smb2req);
in_security_buffer.length = in_security_length;
subreq = smbd_smb2_session_setup_send(smb2req,
smb2req->sconn->ev_ctx,
smb2req,
in_session_id,
in_flags,
in_security_mode,
in_previous_session_id,
in_security_buffer);
if (subreq == NULL) {
return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
}
tevent_req_set_callback(subreq, smbd_smb2_request_sesssetup_done, smb2req);
return smbd_smb2_request_pending_queue(smb2req, subreq, 500);
}
static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq)
{
struct smbd_smb2_request *smb2req =
tevent_req_callback_data(subreq,
struct smbd_smb2_request);
uint8_t *outhdr;
DATA_BLOB outbody;
DATA_BLOB outdyn;
uint16_t out_session_flags;
uint64_t out_session_id;
uint16_t out_security_offset;
DATA_BLOB out_security_buffer = data_blob_null;
NTSTATUS status;
NTSTATUS error; /* transport error */
status = smbd_smb2_session_setup_recv(subreq,
&out_session_flags,
smb2req,
&out_security_buffer,
&out_session_id);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status) &&
!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
status = nt_status_squash(status);
error = smbd_smb2_request_error(smb2req, status);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(smb2req->sconn,
nt_errstr(error));
return;
}
return;
}
out_security_offset = SMB2_HDR_BODY + 0x08;
outhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x08);
if (outbody.data == NULL) {
error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(smb2req->sconn,
nt_errstr(error));
return;
}
return;
}
SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
SSVAL(outbody.data, 0x02,
out_session_flags); /* session flags */
SSVAL(outbody.data, 0x04,
out_security_offset); /* security buffer offset */
SSVAL(outbody.data, 0x06,
out_security_buffer.length); /* security buffer length */
outdyn = out_security_buffer;
error = smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn,
__location__);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(smb2req->sconn,
nt_errstr(error));
return;
}
}
static NTSTATUS smbd_smb2_auth_generic_return(struct smbXsrv_session *session,
struct smbd_smb2_request *smb2req,
uint8_t in_security_mode,
struct auth_session_info *session_info,
uint16_t *out_session_flags,
uint64_t *out_session_id)
{
NTSTATUS status;
bool guest = false;
uint8_t session_key[16];
struct smbXsrv_session *x = session;
struct smbXsrv_connection *conn = session->connection;
if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
lp_server_signing() == SMB_SIGNING_REQUIRED) {
x->global->signing_required = true;
}
if (lp_smb_encrypt(-1) == SMB_SIGNING_REQUIRED) {
x->global->encryption_required = true;
}
if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
/* we map anonymous to guest internally */
*out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
*out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
/* force no signing */
x->global->signing_required = false;
guest = true;
}
if (guest && x->global->encryption_required) {
DEBUG(1,("reject guest session as encryption is required\n"));
return NT_STATUS_ACCESS_DENIED;
}
if (!(conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
if (x->global->encryption_required) {
DEBUG(1,("reject session with dialect[0x%04X] "
"as encryption is required\n",
conn->smb2.server.dialect));
return NT_STATUS_ACCESS_DENIED;
}
}
if (x->global->encryption_required) {
*out_session_flags |= SMB2_SESSION_FLAG_ENCRYPT_DATA;
}
ZERO_STRUCT(session_key);
memcpy(session_key, session_info->session_key.data,
MIN(session_info->session_key.length, sizeof(session_key)));
x->global->signing_key = data_blob_talloc(x->global,
session_key,
sizeof(session_key));
if (x->global->signing_key.data == NULL) {
ZERO_STRUCT(session_key);
return NT_STATUS_NO_MEMORY;
}
if (conn->protocol >= PROTOCOL_SMB2_24) {
const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
const DATA_BLOB context = data_blob_string_const_null("SmbSign");
smb2_key_derivation(session_key, sizeof(session_key),
label.data, label.length,
context.data, context.length,
x->global->signing_key.data);
}
if (conn->protocol >= PROTOCOL_SMB2_24) {
const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
x->global->decryption_key = data_blob_talloc(x->global,
session_key,
sizeof(session_key));
if (x->global->decryption_key.data == NULL) {
ZERO_STRUCT(session_key);
return NT_STATUS_NO_MEMORY;
}
smb2_key_derivation(session_key, sizeof(session_key),
label.data, label.length,
context.data, context.length,
x->global->decryption_key.data);
}
if (conn->protocol >= PROTOCOL_SMB2_24) {
const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
const DATA_BLOB context = data_blob_string_const_null("ServerOut");
x->global->encryption_key = data_blob_talloc(x->global,
session_key,
sizeof(session_key));
if (x->global->encryption_key.data == NULL) {
ZERO_STRUCT(session_key);
return NT_STATUS_NO_MEMORY;
}
smb2_key_derivation(session_key, sizeof(session_key),
label.data, label.length,
context.data, context.length,
x->global->encryption_key.data);
generate_random_buffer((uint8_t *)&x->nonce_high, sizeof(x->nonce_high));
x->nonce_low = 1;
}
x->global->application_key = data_blob_dup_talloc(x->global,
x->global->signing_key);
if (x->global->application_key.data == NULL) {
ZERO_STRUCT(session_key);
return NT_STATUS_NO_MEMORY;
}
if (conn->protocol >= PROTOCOL_SMB2_24) {
const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
smb2_key_derivation(session_key, sizeof(session_key),
label.data, label.length,
context.data, context.length,
x->global->application_key.data);
}
ZERO_STRUCT(session_key);
x->global->channels[0].signing_key = data_blob_dup_talloc(x->global->channels,
x->global->signing_key);
if (x->global->channels[0].signing_key.data == NULL) {
return NT_STATUS_NO_MEMORY;
}
data_blob_clear_free(&session_info->session_key);
session_info->session_key = data_blob_dup_talloc(session_info,
x->global->application_key);
if (session_info->session_key.data == NULL) {
return NT_STATUS_NO_MEMORY;
}
session->compat = talloc_zero(session, struct user_struct);
if (session->compat == NULL) {
return NT_STATUS_NO_MEMORY;
}
session->compat->session = session;
session->compat->homes_snum = -1;
session->compat->session_info = session_info;
session->compat->session_keystr = NULL;
session->compat->vuid = session->global->session_wire_id;
DLIST_ADD(smb2req->sconn->users, session->compat);
smb2req->sconn->num_users++;
if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
session->compat->homes_snum =
register_homes_share(session_info->unix_info->unix_name);
}
set_current_user_info(session_info->unix_info->sanitized_username,
session_info->unix_info->unix_name,
session_info->info->domain_name);
reload_services(smb2req->sconn, conn_snum_used, true);
session->status = NT_STATUS_OK;
session->global->auth_session_info = session_info;
session->global->auth_session_info_seqnum += 1;
session->global->channels[0].auth_session_info_seqnum =
session->global->auth_session_info_seqnum;
session->global->expiration_time = gensec_expire_time(session->gensec);
if (!session_claim(session)) {
DEBUG(1, ("smb2: Failed to claim session "
"for vuid=%llu\n",
(unsigned long long)session->compat->vuid));
return NT_STATUS_LOGON_FAILURE;
}
status = smbXsrv_session_update(session);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
(unsigned long long)session->compat->vuid,
nt_errstr(status)));
return NT_STATUS_LOGON_FAILURE;
}
/*
* we attach the session to the request
* so that the response can be signed
*/
smb2req->session = session;
if (!guest) {
smb2req->do_signing = true;
}
global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
*out_session_id = session->global->session_wire_id;
return NT_STATUS_OK;
}
static NTSTATUS smbd_smb2_reauth_generic_return(struct smbXsrv_session *session,
struct smbd_smb2_request *smb2req,
struct auth_session_info *session_info,
uint16_t *out_session_flags,
uint64_t *out_session_id)
{
NTSTATUS status;
struct smbXsrv_session *x = session;
struct smbXsrv_connection *conn = session->connection;
data_blob_clear_free(&session_info->session_key);
session_info->session_key = data_blob_dup_talloc(session_info,
x->global->application_key);
if (session_info->session_key.data == NULL) {
return NT_STATUS_NO_MEMORY;
}
session->compat->session_info = session_info;
session->compat->vuid = session->global->session_wire_id;
session->compat->homes_snum =
register_homes_share(session_info->unix_info->unix_name);
set_current_user_info(session_info->unix_info->sanitized_username,
session_info->unix_info->unix_name,
session_info->info->domain_name);
reload_services(smb2req->sconn, conn_snum_used, true);
session->status = NT_STATUS_OK;
TALLOC_FREE(session->global->auth_session_info);
session->global->auth_session_info = session_info;
session->global->auth_session_info_seqnum += 1;
session->global->channels[0].auth_session_info_seqnum =
session->global->auth_session_info_seqnum;
session->global->expiration_time = gensec_expire_time(session->gensec);
status = smbXsrv_session_update(session);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
(unsigned long long)session->compat->vuid,
nt_errstr(status)));
return NT_STATUS_LOGON_FAILURE;
}
conn_clear_vuid_caches(conn->sconn, session->compat->vuid);
*out_session_id = session->global->session_wire_id;
return NT_STATUS_OK;
}
struct smbd_smb2_session_setup_state {
struct tevent_context *ev;
struct smbd_smb2_request *smb2req;
uint64_t in_session_id;
uint8_t in_flags;
uint8_t in_security_mode;
uint64_t in_previous_session_id;
DATA_BLOB in_security_buffer;
struct smbXsrv_session *session;
struct auth_session_info *session_info;
uint16_t out_session_flags;
DATA_BLOB out_security_buffer;
uint64_t out_session_id;
/* The following pointer is owned by state->session. */
struct smbd_smb2_session_setup_state **pp_self_ref;
};
static int pp_self_ref_destructor(struct smbd_smb2_session_setup_state **pp_state)
{
(*pp_state)->session = NULL;
/*
* To make things clearer, ensure the pp_self_ref
* pointer is nulled out. We're never going to
* access this again.
*/
(*pp_state)->pp_self_ref = NULL;
return 0;
}
static int smbd_smb2_session_setup_state_destructor(struct smbd_smb2_session_setup_state *state)
{
/*
* If state->session is not NULL,
* we move the session from the session table to the request on failure
* so that the error response can be correctly signed, but the session
* is then really deleted when the request is done.
*/
if (state->session == NULL) {
return 0;
}
state->session->status = NT_STATUS_USER_SESSION_DELETED;
state->smb2req->session = talloc_move(state->smb2req, &state->session);
return 0;
}
static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq);
static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq);
/************************************************************************
We have to tag the state->session pointer with memory talloc'ed
on it to ensure it gets NULL'ed out if the underlying struct smbXsrv_session
is deleted by shutdown whilst this request is in flight.
************************************************************************/
static NTSTATUS tag_state_session_ptr(struct smbd_smb2_session_setup_state *state)
{
state->pp_self_ref = talloc_zero(state->session,
struct smbd_smb2_session_setup_state *);
if (state->pp_self_ref == NULL) {
return NT_STATUS_NO_MEMORY;
}
*state->pp_self_ref = state;
talloc_set_destructor(state->pp_self_ref, pp_self_ref_destructor);
return NT_STATUS_OK;
}
static struct tevent_req *smbd_smb2_session_setup_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
uint64_t in_session_id,
uint8_t in_flags,
uint8_t in_security_mode,
uint64_t in_previous_session_id,
DATA_BLOB in_security_buffer)
{
struct tevent_req *req;
struct smbd_smb2_session_setup_state *state;
NTSTATUS status;
NTTIME now = timeval_to_nttime(&smb2req->request_time);
struct tevent_req *subreq;
req = tevent_req_create(mem_ctx, &state,
struct smbd_smb2_session_setup_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->smb2req = smb2req;
state->in_session_id = in_session_id;
state->in_flags = in_flags;
state->in_security_mode = in_security_mode;
state->in_previous_session_id = in_previous_session_id;
state->in_security_buffer = in_security_buffer;
if (in_flags & SMB2_SESSION_FLAG_BINDING) {
if (smb2req->sconn->conn->protocol < PROTOCOL_SMB2_22) {
tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
return tevent_req_post(req, ev);
}
/*
* We do not support multi channel.
*/
tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
return tevent_req_post(req, ev);
}
talloc_set_destructor(state, smbd_smb2_session_setup_state_destructor);
if (state->in_session_id == 0) {
/* create a new session */
status = smbXsrv_session_create(state->smb2req->sconn->conn,
now, &state->session);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
} else {
status = smb2srv_session_lookup(state->smb2req->sconn->conn,
state->in_session_id, now,
&state->session);
if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
status = NT_STATUS_OK;
}
if (NT_STATUS_IS_OK(status)) {
state->session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
status = NT_STATUS_MORE_PROCESSING_REQUIRED;
TALLOC_FREE(state->session->gensec);
}
if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
status = tag_state_session_ptr(state);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
if (state->session->gensec == NULL) {
status = auth_generic_prepare(state->session,
state->session->connection->remote_address,
&state->session->gensec);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
gensec_want_feature(state->session->gensec, GENSEC_FEATURE_SESSION_KEY);
gensec_want_feature(state->session->gensec, GENSEC_FEATURE_UNIX_TOKEN);
status = gensec_start_mech_by_oid(state->session->gensec,
GENSEC_OID_SPNEGO);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
}
become_root();
subreq = gensec_update_send(state, state->ev,
state->session->gensec,
state->in_security_buffer);
unbecome_root();
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, smbd_smb2_session_setup_gensec_done, req);
return req;
}
static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smbd_smb2_session_setup_state *state =
tevent_req_data(req,
struct smbd_smb2_session_setup_state);
NTSTATUS status;
become_root();
status = gensec_update_recv(subreq, state,
&state->out_security_buffer);
unbecome_root();
TALLOC_FREE(subreq);
if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) &&
!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
state->out_session_id = state->session->global->session_wire_id;
/* we want to keep the session */
state->session = NULL;
TALLOC_FREE(state->pp_self_ref);
tevent_req_nterror(req, status);
return;
}
status = gensec_session_info(state->session->gensec,
state->session->global,
&state->session_info);
if (tevent_req_nterror(req, status)) {
return;
}
if ((state->in_previous_session_id != 0) &&
(state->session->global->session_wire_id !=
state->in_previous_session_id))
{
subreq = smb2srv_session_close_previous_send(state, state->ev,
state->session->connection,
state->session_info,
state->in_previous_session_id,
state->session->global->session_wire_id);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq,
smbd_smb2_session_setup_previous_done,
req);
return;
}
if (state->session->global->auth_session_info != NULL) {
status = smbd_smb2_reauth_generic_return(state->session,
state->smb2req,
state->session_info,
&state->out_session_flags,
&state->out_session_id);
if (tevent_req_nterror(req, status)) {
return;
}
/* we want to keep the session */
state->session = NULL;
TALLOC_FREE(state->pp_self_ref);
tevent_req_done(req);
return;
}
status = smbd_smb2_auth_generic_return(state->session,
state->smb2req,
state->in_security_mode,
state->session_info,
&state->out_session_flags,
&state->out_session_id);
if (tevent_req_nterror(req, status)) {
return;
}
/* we want to keep the session */
state->session = NULL;
TALLOC_FREE(state->pp_self_ref);
tevent_req_done(req);
return;
}
static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smbd_smb2_session_setup_state *state =
tevent_req_data(req,
struct smbd_smb2_session_setup_state);
NTSTATUS status;
status = smb2srv_session_close_previous_recv(subreq);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
if (state->session->global->auth_session_info != NULL) {
status = smbd_smb2_reauth_generic_return(state->session,
state->smb2req,
state->session_info,
&state->out_session_flags,
&state->out_session_id);
if (tevent_req_nterror(req, status)) {
return;
}
/* we want to keep the session */
state->session = NULL;
TALLOC_FREE(state->pp_self_ref);
tevent_req_done(req);
return;
}
status = smbd_smb2_auth_generic_return(state->session,
state->smb2req,
state->in_security_mode,
state->session_info,
&state->out_session_flags,
&state->out_session_id);
if (tevent_req_nterror(req, status)) {
return;
}
/* we want to keep the session */
state->session = NULL;
TALLOC_FREE(state->pp_self_ref);
tevent_req_done(req);
return;
}
static NTSTATUS smbd_smb2_session_setup_recv(struct tevent_req *req,
uint16_t *out_session_flags,
TALLOC_CTX *mem_ctx,
DATA_BLOB *out_security_buffer,
uint64_t *out_session_id)
{
struct smbd_smb2_session_setup_state *state =
tevent_req_data(req,
struct smbd_smb2_session_setup_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
tevent_req_received(req);
return nt_status_squash(status);
}
} else {
status = NT_STATUS_OK;
}
*out_session_flags = state->out_session_flags;
*out_security_buffer = state->out_security_buffer;
*out_session_id = state->out_session_id;
talloc_steal(mem_ctx, out_security_buffer->data);
tevent_req_received(req);
return status;
}
NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
{
NTSTATUS status;
DATA_BLOB outbody;
status = smbd_smb2_request_verify_sizes(req, 0x04);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(req, status);
}
/*
* TODO: cancel all outstanding requests on the session
*/
status = smbXsrv_session_logoff(req->session);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("smbd_smb2_request_process_logoff: "
"smbXsrv_session_logoff() failed: %s\n",
nt_errstr(status)));
/*
* If we hit this case, there is something completely
* wrong, so we better disconnect the transport connection.
*/
return status;
}
/*
* we may need to sign the response, so we need to keep
* the session until the response is sent to the wire.
*/
talloc_steal(req, req->session);
outbody = data_blob_talloc(req->out.vector, NULL, 0x04);
if (outbody.data == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
SSVAL(outbody.data, 0x00, 0x04); /* struct size */
SSVAL(outbody.data, 0x02, 0); /* reserved */
return smbd_smb2_request_done(req, outbody, NULL);
}