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/*
Unix SMB/CIFS implementation.
async getgrsid
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 "librpc/gen_ndr/ndr_wbint_c.h"
#include "../libcli/security/security.h"
struct wb_getgrsid_state {
struct tevent_context *ev;
struct dom_sid sid;
int max_nesting;
const char *domname;
const char *name;
enum lsa_SidType type;
gid_t gid;
struct talloc_dict *members;
};
static void wb_getgrsid_lookupsid_done(struct tevent_req *subreq);
static void wb_getgrsid_sid2gid_done(struct tevent_req *subreq);
static void wb_getgrsid_got_members(struct tevent_req *subreq);
struct tevent_req *wb_getgrsid_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const struct dom_sid *group_sid,
int max_nesting)
{
struct tevent_req *req, *subreq;
struct wb_getgrsid_state *state;
req = tevent_req_create(mem_ctx, &state, struct wb_getgrsid_state);
if (req == NULL) {
return NULL;
}
sid_copy(&state->sid, group_sid);
state->ev = ev;
state->max_nesting = max_nesting;
if (lp_winbind_trusted_domains_only()) {
struct winbindd_domain *our_domain = find_our_domain();
if (dom_sid_compare_domain(group_sid, &our_domain->sid) == 0) {
DEBUG(7, ("winbindd_getgrsid: My domain -- rejecting "
"getgrsid() for %s\n", sid_string_tos(group_sid)));
tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
return tevent_req_post(req, ev);
}
}
subreq = wb_lookupsid_send(state, ev, &state->sid);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, wb_getgrsid_lookupsid_done, req);
return req;
}
static void wb_getgrsid_lookupsid_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct wb_getgrsid_state *state = tevent_req_data(
req, struct wb_getgrsid_state);
NTSTATUS status;
status = wb_lookupsid_recv(subreq, state, &state->type,
&state->domname, &state->name);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
switch (state->type) {
case SID_NAME_DOM_GRP:
case SID_NAME_ALIAS:
case SID_NAME_WKN_GRP:
/*
* also treat user-type SIDS (they might map to ID_TYPE_BOTH)
*/
case SID_NAME_USER:
case SID_NAME_COMPUTER:
break;
default:
tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
return;
}
subreq = wb_sids2xids_send(state, state->ev, &state->sid, 1);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, wb_getgrsid_sid2gid_done, req);
}
static void wb_getgrsid_sid2gid_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct wb_getgrsid_state *state = tevent_req_data(
req, struct wb_getgrsid_state);
NTSTATUS status;
struct unixid xid;
status = wb_sids2xids_recv(subreq, &xid);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
/*
* We are filtering further down in sids2xids, but that filtering
* depends on the actual type of the sid handed in (as determined
* by lookupsids). Here we need to filter for the type of object
* actually requested, in this case uid.
*/
if (!(xid.type == ID_TYPE_GID || xid.type == ID_TYPE_BOTH)) {
tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
return;
}
state->gid = (gid_t)xid.id;
if (state->type == SID_NAME_USER || state->type == SID_NAME_COMPUTER) {
/*
* special treatment for a user sid that is
* mapped to ID_TYPE_BOTH:
* create a group with the sid/xid as only member
*/
char *name;
if (xid.type != ID_TYPE_BOTH) {
tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
return;
}
state->members = talloc_dict_init(state);
if (tevent_req_nomem(state->members, req)) {
return;
}
name = fill_domain_username_talloc(talloc_tos(),
state->domname,
state->name,
true /* can_assume */);
if (tevent_req_nomem(name, req)) {
return;
}
status = add_wbint_Principal_to_dict(talloc_tos(),
&state->sid,
&name,
state->type,
state->members);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
tevent_req_done(req);
return;
}
/*
* the "regular" case of a group type sid.
*/
subreq = wb_group_members_send(state, state->ev, &state->sid,
state->type, state->max_nesting);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, wb_getgrsid_got_members, req);
}
static void wb_getgrsid_got_members(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct wb_getgrsid_state *state = tevent_req_data(
req, struct wb_getgrsid_state);
NTSTATUS status;
status = wb_group_members_recv(subreq, state, &state->members);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
tevent_req_done(req);
}
NTSTATUS wb_getgrsid_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
const char **domname, const char **name, gid_t *gid,
struct talloc_dict **members)
{
struct wb_getgrsid_state *state = tevent_req_data(
req, struct wb_getgrsid_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*domname = talloc_move(mem_ctx, &state->domname);
*name = talloc_move(mem_ctx, &state->name);
*gid = state->gid;
*members = talloc_move(mem_ctx, &state->members);
return NT_STATUS_OK;
}
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