/*
Unix SMB/CIFS implementation.
SMB2 composite connection setup
Copyright (C) Andrew Tridgell 2005
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 .
*/
#include "includes.h"
#include
#include "lib/util/tevent_ntstatus.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/raw/raw_proto.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#include "libcli/composite/composite.h"
#include "libcli/resolve/resolve.h"
#include "param/param.h"
struct smb2_connect_state {
struct tevent_context *ev;
struct cli_credentials *credentials;
struct resolve_context *resolve_ctx;
const char *host;
const char *share;
const char **ports;
const char *socket_options;
struct gensec_settings *gensec_settings;
struct smbcli_options options;
struct smb2_negprot negprot;
struct smb2_tree_connect tcon;
struct smb2_session *session;
struct smb2_tree *tree;
};
static void smb2_connect_resolve_done(struct composite_context *creq);
/*
a composite function that does a full negprot/sesssetup/tcon, returning
a connected smb2_tree
*/
struct tevent_req *smb2_connect_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const char *host,
const char **ports,
const char *share,
struct resolve_context *resolve_ctx,
struct cli_credentials *credentials,
struct smbcli_options *options,
const char *socket_options,
struct gensec_settings *gensec_settings)
{
struct tevent_req *req;
struct smb2_connect_state *state;
struct nbt_name name;
struct composite_context *creq;
req = tevent_req_create(mem_ctx, &state,
struct smb2_connect_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->credentials = credentials;
state->options = *options;
state->host = host;
state->ports = ports;
state->share = share;
state->resolve_ctx = resolve_ctx;
state->socket_options = socket_options;
state->gensec_settings = gensec_settings;
ZERO_STRUCT(name);
name.name = host;
creq = resolve_name_send(resolve_ctx, state, &name, ev);
if (tevent_req_nomem(creq, req)) {
return tevent_req_post(req, ev);
}
creq->async.fn = smb2_connect_resolve_done;
creq->async.private_data = req;
return req;
}
static void smb2_connect_socket_done(struct composite_context *creq);
static void smb2_connect_resolve_done(struct composite_context *creq)
{
struct tevent_req *req =
talloc_get_type_abort(creq->async.private_data,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
NTSTATUS status;
const char *addr;
const char **ports;
const char *default_ports[] = { "445", NULL };
status = resolve_name_recv(creq, state, &addr);
if (tevent_req_nterror(req, status)) {
return;
}
if (state->ports == NULL) {
ports = default_ports;
} else {
ports = state->ports;
}
creq = smbcli_sock_connect_send(state, addr, ports,
state->host, state->resolve_ctx,
state->ev, state->socket_options);
if (tevent_req_nomem(creq, req)) {
return;
}
creq->async.fn = smb2_connect_socket_done;
creq->async.private_data = req;
}
static void smb2_connect_negprot_done(struct smb2_request *smb2req);
static void smb2_connect_socket_done(struct composite_context *creq)
{
struct tevent_req *req =
talloc_get_type_abort(creq->async.private_data,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
struct smbcli_socket *sock;
struct smb2_transport *transport;
struct smb2_request *smb2req;
NTSTATUS status;
uint16_t dialects[3] = {
SMB2_DIALECT_REVISION_000,
SMB2_DIALECT_REVISION_202,
SMB2_DIALECT_REVISION_210
};
status = smbcli_sock_connect_recv(creq, state, &sock);
if (tevent_req_nterror(req, status)) {
return;
}
transport = smb2_transport_init(sock, state, &state->options);
if (tevent_req_nomem(transport, req)) {
return;
}
ZERO_STRUCT(state->negprot);
state->negprot.in.dialect_count = ARRAY_SIZE(dialects);
switch (transport->options.signing) {
case SMB_SIGNING_OFF:
state->negprot.in.security_mode = 0;
break;
case SMB_SIGNING_DEFAULT:
case SMB_SIGNING_SUPPORTED:
case SMB_SIGNING_AUTO:
state->negprot.in.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
break;
case SMB_SIGNING_REQUIRED:
state->negprot.in.security_mode =
SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED;
break;
}
state->negprot.in.capabilities = 0;
unix_to_nt_time(&state->negprot.in.start_time, time(NULL));
state->negprot.in.dialects = dialects;
smb2req = smb2_negprot_send(transport, &state->negprot);
if (tevent_req_nomem(smb2req, req)) {
return;
}
smb2req->async.fn = smb2_connect_negprot_done;
smb2req->async.private_data = req;
}
static void smb2_connect_session_done(struct tevent_req *subreq);
static void smb2_connect_negprot_done(struct smb2_request *smb2req)
{
struct tevent_req *req =
talloc_get_type_abort(smb2req->async.private_data,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
struct smb2_transport *transport = smb2req->transport;
struct tevent_req *subreq;
NTSTATUS status;
status = smb2_negprot_recv(smb2req, state, &state->negprot);
if (tevent_req_nterror(req, status)) {
return;
}
transport->negotiate.secblob = state->negprot.out.secblob;
talloc_steal(transport, transport->negotiate.secblob.data);
transport->negotiate.system_time = state->negprot.out.system_time;
transport->negotiate.server_start_time = state->negprot.out.server_start_time;
transport->negotiate.security_mode = state->negprot.out.security_mode;
transport->negotiate.dialect_revision = state->negprot.out.dialect_revision;
switch (transport->options.signing) {
case SMB_SIGNING_OFF:
if (transport->negotiate.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
transport->signing_required = false;
break;
case SMB_SIGNING_DEFAULT:
case SMB_SIGNING_SUPPORTED:
case SMB_SIGNING_AUTO:
if (transport->negotiate.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
transport->signing_required = true;
} else {
transport->signing_required = false;
}
break;
case SMB_SIGNING_REQUIRED:
if (transport->negotiate.security_mode & SMB2_NEGOTIATE_SIGNING_ENABLED) {
transport->signing_required = true;
} else {
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
break;
}
state->session = smb2_session_init(transport, state->gensec_settings, state, true);
if (tevent_req_nomem(state->session, req)) {
return;
}
subreq = smb2_session_setup_spnego_send(state, state->ev,
state->session,
state->credentials);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, smb2_connect_session_done, req);
}
static void smb2_connect_tcon_done(struct smb2_request *smb2req);
static void smb2_connect_session_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
struct smb2_request *smb2req;
NTSTATUS status;
status = smb2_session_setup_spnego_recv(subreq);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
state->tree = smb2_tree_init(state->session, state, true);
if (tevent_req_nomem(state->tree, req)) {
return;
}
state->tcon.in.reserved = 0;
state->tcon.in.path = talloc_asprintf(state, "\\\\%s\\%s",
state->host, state->share);
if (tevent_req_nomem(state->tcon.in.path, req)) {
return;
}
smb2req = smb2_tree_connect_send(state->tree, &state->tcon);
if (tevent_req_nomem(smb2req, req)) {
return;
}
smb2req->async.fn = smb2_connect_tcon_done;
smb2req->async.private_data = req;
}
static void smb2_connect_tcon_done(struct smb2_request *smb2req)
{
struct tevent_req *req =
talloc_get_type_abort(smb2req->async.private_data,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
NTSTATUS status;
status = smb2_tree_connect_recv(smb2req, &state->tcon);
if (tevent_req_nterror(req, status)) {
return;
}
state->tree->tid = state->tcon.out.tid;
tevent_req_done(req);
}
NTSTATUS smb2_connect_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
struct smb2_tree **tree)
{
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*tree = talloc_move(mem_ctx, &state->tree);
tevent_req_received(req);
return NT_STATUS_OK;
}
/*
sync version of smb2_connect
*/
NTSTATUS smb2_connect(TALLOC_CTX *mem_ctx,
const char *host,
const char **ports,
const char *share,
struct resolve_context *resolve_ctx,
struct cli_credentials *credentials,
struct smb2_tree **tree,
struct tevent_context *ev,
struct smbcli_options *options,
const char *socket_options,
struct gensec_settings *gensec_settings)
{
struct tevent_req *subreq;
NTSTATUS status;
bool ok;
TALLOC_CTX *frame = talloc_stackframe();
if (frame == NULL) {
return NT_STATUS_NO_MEMORY;
}
subreq = smb2_connect_send(frame,
ev,
host,
ports,
share,
resolve_ctx,
credentials,
options,
socket_options,
gensec_settings);
if (subreq == NULL) {
TALLOC_FREE(frame);
return NT_STATUS_NO_MEMORY;
}
ok = tevent_req_poll(subreq, ev);
if (!ok) {
status = map_nt_error_from_unix_common(errno);
TALLOC_FREE(frame);
return status;
}
status = smb2_connect_recv(subreq, mem_ctx, tree);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(frame);
return status;
}
TALLOC_FREE(frame);
return NT_STATUS_OK;
}