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samba-mirror/source3/winbindd/winbindd_sids_to_xids.c

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/*
Unix SMB/CIFS implementation.
async implementation of WINBINDD_SIDS_TO_XIDS
Copyright (C) Volker Lendecke 2011
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 "../libcli/security/security.h"
#include "librpc/gen_ndr/ndr_wbint_c.h"
#include "idmap_cache.h"
struct winbindd_sids_to_xids_state {
struct tevent_context *ev;
struct dom_sid *sids;
uint32_t num_sids;
struct id_map *cached;
struct dom_sid *non_cached;
uint32_t num_non_cached;
struct lsa_RefDomainList *domains;
struct lsa_TransNameArray *names;
struct wbint_TransIDArray ids;
};
static bool winbindd_sids_to_xids_in_cache(struct dom_sid *sid,
struct id_map *map);
static void winbindd_sids_to_xids_lookupsids_done(struct tevent_req *subreq);
static void winbindd_sids_to_xids_done(struct tevent_req *subreq);
struct tevent_req *winbindd_sids_to_xids_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_sids_to_xids_state *state;
uint32_t i;
req = tevent_req_create(mem_ctx, &state,
struct winbindd_sids_to_xids_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
DEBUG(3, ("sids_to_xids\n"));
if (request->extra_len == 0) {
tevent_req_done(req);
return tevent_req_post(req, ev);
}
if (request->extra_data.data[request->extra_len-1] != '\0') {
DEBUG(10, ("Got invalid sids list\n"));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (!parse_sidlist(state, request->extra_data.data,
&state->sids, &state->num_sids)) {
DEBUG(10, ("parse_sidlist failed\n"));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
DEBUG(10, ("num_sids: %d\n", (int)state->num_sids));
state->cached = TALLOC_ZERO_ARRAY(state, struct id_map,
state->num_sids);
if (tevent_req_nomem(state->cached, req)) {
return tevent_req_post(req, ev);
}
state->non_cached = TALLOC_ARRAY(state, struct dom_sid,
state->num_sids);
if (tevent_req_nomem(state->non_cached, req)) {
return tevent_req_post(req, ev);
}
for (i=0; i<state->num_sids; i++) {
DEBUG(10, ("SID %d: %s\n", (int)i,
sid_string_dbg(&state->sids[i])));
if (winbindd_sids_to_xids_in_cache(&state->sids[i],
&state->cached[i])) {
continue;
}
sid_copy(&state->non_cached[state->num_non_cached],
&state->sids[i]);
state->num_non_cached += 1;
}
if (state->num_non_cached == 0) {
tevent_req_done(req);
return tevent_req_post(req, ev);
}
subreq = wb_lookupsids_send(state, ev, state->non_cached,
state->num_non_cached);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, winbindd_sids_to_xids_lookupsids_done,
req);
return req;
}
static bool winbindd_sids_to_xids_in_cache(struct dom_sid *sid,
struct id_map *map)
{
uid_t uid;
gid_t gid;
bool expired;
if (!winbindd_use_idmap_cache()) {
return false;
}
/*
* SIDS_TO_XIDS is primarily used to resolve the user's group
* sids. So we check groups before users.
*/
if (idmap_cache_find_sid2gid(sid, &gid, &expired)) {
if (expired && is_domain_offline(find_our_domain())) {
return false;
}
map->sid = sid;
map->xid.id = gid;
map->xid.type = ID_TYPE_GID;
map->status = ID_MAPPED;
return true;
}
if (idmap_cache_find_sid2uid(sid, &uid, &expired)) {
if (expired && is_domain_online(find_our_domain())) {
return false;
}
map->sid = sid;
map->xid.id = uid;
map->xid.type = ID_TYPE_UID;
map->status = ID_MAPPED;
return true;
}
return false;
}
static void winbindd_sids_to_xids_lookupsids_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct winbindd_sids_to_xids_state *state = tevent_req_data(
req, struct winbindd_sids_to_xids_state);
struct winbindd_child *child;
NTSTATUS status;
int i;
status = wb_lookupsids_recv(subreq, state, &state->domains,
&state->names);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
state->ids.num_ids = state->num_non_cached;
state->ids.ids = TALLOC_ARRAY(state, struct wbint_TransID,
state->num_non_cached);
if (tevent_req_nomem(state->ids.ids, req)) {
return;
}
for (i=0; i<state->num_non_cached; i++) {
struct lsa_TranslatedName *n = &state->names->names[i];
struct wbint_TransID *t = &state->ids.ids[i];
switch (n->sid_type) {
case SID_NAME_USER:
case SID_NAME_COMPUTER:
t->type = WBC_ID_TYPE_UID;
break;
case SID_NAME_DOM_GRP:
case SID_NAME_ALIAS:
case SID_NAME_WKN_GRP:
t->type = WBC_ID_TYPE_GID;
break;
default:
t->type = WBC_ID_TYPE_NOT_SPECIFIED;
break;
};
t->domain_index = n->sid_index;
sid_peek_rid(&state->sids[i], &t->rid);
t->unix_id = (uint64_t)-1;
}
child = idmap_child();
subreq = dcerpc_wbint_Sids2UnixIDs_send(
state, state->ev, child->binding_handle, state->domains,
&state->ids);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, winbindd_sids_to_xids_done, req);
}
static void winbindd_sids_to_xids_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct winbindd_sids_to_xids_state *state = tevent_req_data(
req, struct winbindd_sids_to_xids_state);
NTSTATUS status, result;
status = dcerpc_wbint_Sids2UnixIDs_recv(subreq, state, &result);
TALLOC_FREE(subreq);
if (any_nt_status_not_ok(status, result, &status)) {
tevent_req_nterror(req, status);
return;
}
tevent_req_done(req);
}
NTSTATUS winbindd_sids_to_xids_recv(struct tevent_req *req,
struct winbindd_response *response)
{
struct winbindd_sids_to_xids_state *state = tevent_req_data(
req, struct winbindd_sids_to_xids_state);
NTSTATUS status;
char *result;
uint32_t i, num_non_cached;
if (tevent_req_is_nterror(req, &status)) {
DEBUG(5, ("wb_sids_to_xids failed: %s\n", nt_errstr(status)));
return status;
}
result = talloc_strdup(response, "");
if (result == NULL) {
return NT_STATUS_NO_MEMORY;
}
num_non_cached = 0;
for (i=0; i<state->num_sids; i++) {
char type;
uint64_t unix_id = (uint64_t)-1;
bool found = true;
if (state->cached[i].sid != NULL) {
unix_id = state->cached[i].xid.id;
if (state->cached[i].xid.type == ID_TYPE_UID) {
type = 'U';
} else {
type = 'G';
}
} else {
unix_id = state->ids.ids[num_non_cached].unix_id;
switch(state->ids.ids[num_non_cached].type) {
case WBC_ID_TYPE_UID:
type = 'U';
idmap_cache_set_sid2uid(
&state->non_cached[num_non_cached],
unix_id);
break;
case WBC_ID_TYPE_GID:
type = 'G';
idmap_cache_set_sid2gid(
&state->non_cached[num_non_cached],
unix_id);
break;
default:
found = false;
}
num_non_cached += 1;
}
if (found) {
result = talloc_asprintf_append_buffer(
result, "%c%lu\n", type,
(unsigned long)unix_id);
} else {
result = talloc_asprintf_append_buffer(result, "\n");
}
if (result == NULL) {
return NT_STATUS_NO_MEMORY;
}
}
response->extra_data.data = result;
response->length += talloc_get_size(result);
return NT_STATUS_OK;
}