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/*
Unix SMB/CIFS implementation.
async implementation of WINBINDD_GETGROUPS
Copyright (C) Volker Lendecke 2009
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 "winbindd.h"
#include "passdb/lookup_sid.h" /* only for LOOKUP_NAME_NO_NSS flag */
struct winbindd_getgroups_state {
struct tevent_context *ev;
fstring domname;
fstring username;
struct dom_sid sid;
enum lsa_SidType type;
int num_sids;
struct dom_sid *sids;
int num_gids;
gid_t *gids;
};
static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq);
static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq);
static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq);
struct tevent_req *winbindd_getgroups_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct winbindd_cli_state *cli,
struct winbindd_request *request)
{
struct tevent_req *req, *subreq;
struct winbindd_getgroups_state *state;
char *domuser, *mapped_user;
NTSTATUS status;
req = tevent_req_create(mem_ctx, &state,
struct winbindd_getgroups_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
/* Ensure null termination */
request->data.username[sizeof(request->data.username)-1]='\0';
DEBUG(3, ("getgroups %s\n", request->data.username));
domuser = request->data.username;
status = normalize_name_unmap(state, domuser, &mapped_user);
if (NT_STATUS_IS_OK(status)
|| NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
/* normalize_name_unmapped did something */
domuser = mapped_user;
}
if (!parse_domain_user(domuser, state->domname, state->username)) {
DEBUG(5, ("Could not parse domain user: %s\n", domuser));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
subreq = wb_lookupname_send(state, ev, state->domname, state->username,
LOOKUP_NAME_NO_NSS);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, winbindd_getgroups_lookupname_done,
req);
return req;
}
static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct winbindd_getgroups_state *state = tevent_req_data(
req, struct winbindd_getgroups_state);
NTSTATUS status;
status = wb_lookupname_recv(subreq, &state->sid, &state->type);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
subreq = wb_gettoken_send(state, state->ev, &state->sid);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, winbindd_getgroups_gettoken_done, req);
}
static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct winbindd_getgroups_state *state = tevent_req_data(
req, struct winbindd_getgroups_state);
NTSTATUS status;
status = wb_gettoken_recv(subreq, state, &state->num_sids,
&state->sids);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
/*
* Convert the group SIDs to gids. state->sids[0] contains the user
* sid. If the idmap backend uses ID_TYPE_BOTH, we might need the
* the id of the user sid in the list of group sids, so map the
* complete token.
*/
subreq = wb_sids2xids_send(state, state->ev,
state->sids, state->num_sids);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
}
static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct winbindd_getgroups_state *state = tevent_req_data(
req, struct winbindd_getgroups_state);
NTSTATUS status;
struct unixid *xids;
int i;
xids = talloc_array(state, struct unixid, state->num_sids);
if (tevent_req_nomem(xids, req)) {
return;
}
for (i=0; i < state->num_sids; i++) {
xids[i].type = ID_TYPE_NOT_SPECIFIED;
xids[i].id = UINT32_MAX;
}
status = wb_sids2xids_recv(subreq, xids);
TALLOC_FREE(subreq);
if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED) ||
NT_STATUS_EQUAL(status, STATUS_SOME_UNMAPPED))
{
status = NT_STATUS_OK;
}
if (tevent_req_nterror(req, status)) {
return;
}
state->gids = talloc_array(state, gid_t, state->num_sids);
if (tevent_req_nomem(state->gids, req)) {
return;
}
state->num_gids = 0;
for (i=0; i < state->num_sids; i++) {
bool include_gid = false;
const char *debug_missing = NULL;
switch (xids[i].type) {
case ID_TYPE_NOT_SPECIFIED:
debug_missing = "not specified";
break;
case ID_TYPE_UID:
if (i != 0) {
debug_missing = "uid";
}
break;
case ID_TYPE_GID:
case ID_TYPE_BOTH:
include_gid = true;
break;
}
if (!include_gid) {
if (debug_missing == NULL) {
continue;
}
DEBUG(10, ("WARNING: skipping unix id (%u) for sid %s "
"from group list because the idmap type "
"is %s. "
"This might be a security problem when ACLs "
"contain DENY ACEs!\n",
(unsigned)xids[i].id,
sid_string_tos(&state->sids[i]),
debug_missing));
continue;
}
state->gids[state->num_gids] = (gid_t)xids[i].id;
state->num_gids += 1;
}
/*
* This should not fail, as it does not do any reallocation,
* just updating the talloc size.
*/
state->gids = talloc_realloc(state, state->gids, gid_t, state->num_gids);
if (tevent_req_nomem(state->gids, req)) {
return;
}
tevent_req_done(req);
}
NTSTATUS winbindd_getgroups_recv(struct tevent_req *req,
struct winbindd_response *response)
{
struct winbindd_getgroups_state *state = tevent_req_data(
req, struct winbindd_getgroups_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
DEBUG(5, ("Could not convert sid %s: %s\n",
sid_string_dbg(&state->sid), nt_errstr(status)));
return status;
}
response->data.num_entries = state->num_gids;
if (state->num_gids > 0) {
response->extra_data.data = talloc_move(response,
&state->gids);
response->length += state->num_gids * sizeof(gid_t);
}
return NT_STATUS_OK;
}
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