source3/winbindd/winbindd_sids_to_xids.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_SIDS_TO_XIDS
   4    Copyright (C) Volker Lendecke 2011
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "winbindd.h"
  22 #include "../libcli/security/security.h"
  23 #include "librpc/gen_ndr/ndr_wbint_c.h"
  24 #include "idmap_cache.h"
  25
  26 struct winbindd_sids_to_xids_state {
  27         struct tevent_context *ev;
  28         struct dom_sid *sids;
  29         uint32_t num_sids;
  30
  31         struct id_map *cached;
  32
  33         struct dom_sid *non_cached;
  34         uint32_t num_non_cached;
  35
  36         struct lsa_RefDomainList *domains;
  37         struct lsa_TransNameArray *names;
  38
  39         struct wbint_TransIDArray ids;
  40 };
  41
  42 static bool winbindd_sids_to_xids_in_cache(struct dom_sid *sid,
  43                                            struct id_map *map);
  44 static void winbindd_sids_to_xids_lookupsids_done(struct tevent_req *subreq);
  45 static void winbindd_sids_to_xids_done(struct tevent_req *subreq);
  46
  47 struct tevent_req *winbindd_sids_to_xids_send(TALLOC_CTX *mem_ctx,
  48                                               struct tevent_context *ev,
  49                                               struct winbindd_cli_state *cli,
  50                                               struct winbindd_request *request)
  51 {
  52         struct tevent_req *req, *subreq;
  53         struct winbindd_sids_to_xids_state *state;
  54         uint32_t i;
  55
  56         req = tevent_req_create(mem_ctx, &state,
  57                                 struct winbindd_sids_to_xids_state);
  58         if (req == NULL) {
  59                 return NULL;
  60         }
  61         state->ev = ev;
  62
  63         DEBUG(3, ("sids_to_xids\n"));
  64
  65         if (request->extra_len == 0) {
  66                 tevent_req_done(req);
  67                 return tevent_req_post(req, ev);
  68         }
  69         if (request->extra_data.data[request->extra_len-1] != '\0') {
  70                 DEBUG(10, ("Got invalid sids list\n"));
  71                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  72                 return tevent_req_post(req, ev);
  73         }
  74         if (!parse_sidlist(state, request->extra_data.data,
  75                            &state->sids, &state->num_sids)) {
  76                 DEBUG(10, ("parse_sidlist failed\n"));
  77                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  78                 return tevent_req_post(req, ev);
  79         }
  80
  81         state->cached = TALLOC_ZERO_ARRAY(state, struct id_map,
  82                                           state->num_sids);
  83         if (tevent_req_nomem(state->cached, req)) {
  84                 return tevent_req_post(req, ev);
  85         }
  86         state->non_cached = TALLOC_ARRAY(state, struct dom_sid,
  87                                          state->num_sids);
  88         if (tevent_req_nomem(state->non_cached, req)) {
  89                 return tevent_req_post(req, ev);
  90         }
  91
  92         for (i=0; i<state->num_sids; i++) {
  93                 if (winbindd_sids_to_xids_in_cache(&state->sids[i],
  94                                                    &state->cached[i])) {
  95                         continue;
  96                 }
  97                 sid_copy(&state->non_cached[state->num_non_cached],
  98                          &state->sids[i]);
  99                 state->num_non_cached += 1;
 100         }
 101
 102         if (state->num_non_cached == 0) {
 103                 tevent_req_done(req);
 104                 return tevent_req_post(req, ev);
 105         }
 106
 107         subreq = wb_lookupsids_send(state, ev, state->non_cached,
 108                                     state->num_non_cached);
 109         if (tevent_req_nomem(subreq, req)) {
 110                 return tevent_req_post(req, ev);
 111         }
 112         tevent_req_set_callback(subreq, winbindd_sids_to_xids_lookupsids_done,
 113                                 req);
 114         return req;
 115 }
 116
 117 static bool winbindd_sids_to_xids_in_cache(struct dom_sid *sid,
 118                                            struct id_map *map)
 119 {
 120         uid_t uid;
 121         gid_t gid;
 122         bool expired;
 123
 124         if (!winbindd_use_idmap_cache()) {
 125                 return false;
 126         }
 127         /*
 128          * SIDS_TO_XIDS is primarily used to resolve the user's group
 129          * sids. So we check groups before users.
 130          */
 131         if (idmap_cache_find_sid2gid(sid, &gid, &expired)) {
 132                 if (expired && is_domain_offline(find_our_domain())) {
 133                         return false;
 134                 }
 135                 map->sid = sid;
 136                 map->xid.id = gid;
 137                 map->xid.type = ID_TYPE_GID;
 138                 map->status = ID_MAPPED;
 139                 return true;
 140         }
 141         if (idmap_cache_find_sid2uid(sid, &uid, &expired)) {
 142                 if (expired && is_domain_online(find_our_domain())) {
 143                         return false;
 144                 }
 145                 map->sid = sid;
 146                 map->xid.id = uid;
 147                 map->xid.type = ID_TYPE_UID;
 148                 map->status = ID_MAPPED;
 149                 return true;
 150         }
 151         return false;
 152 }
 153
 154
 155 static void winbindd_sids_to_xids_lookupsids_done(struct tevent_req *subreq)
 156 {
 157         struct tevent_req *req = tevent_req_callback_data(
 158                 subreq, struct tevent_req);
 159         struct winbindd_sids_to_xids_state *state = tevent_req_data(
 160                 req, struct winbindd_sids_to_xids_state);
 161         struct winbindd_child *child;
 162         NTSTATUS status;
 163         int i;
 164
 165         status = wb_lookupsids_recv(subreq, state, &state->domains,
 166                                     &state->names);
 167         TALLOC_FREE(subreq);
 168         if (!NT_STATUS_IS_OK(status)) {
 169                 tevent_req_nterror(req, status);
 170                 return;
 171         }
 172
 173         state->ids.num_ids = state->num_non_cached;
 174         state->ids.ids = TALLOC_ARRAY(state, struct wbint_TransID,
 175                                       state->num_non_cached);
 176         if (tevent_req_nomem(state->ids.ids, req)) {
 177                 return;
 178         }
 179
 180         for (i=0; i<state->num_non_cached; i++) {
 181                 struct lsa_TranslatedName *n = &state->names->names[i];
 182                 struct wbint_TransID *t = &state->ids.ids[i];
 183
 184                 switch (n->sid_type) {
 185                 case SID_NAME_USER:
 186                 case SID_NAME_COMPUTER:
 187                         t->type = WBC_ID_TYPE_UID;
 188                         break;
 189                 case SID_NAME_DOM_GRP:
 190                 case SID_NAME_ALIAS:
 191                 case SID_NAME_WKN_GRP:
 192                         t->type = WBC_ID_TYPE_GID;
 193                         break;
 194                 default:
 195                         t->type = WBC_ID_TYPE_NOT_SPECIFIED;
 196                         break;
 197                 };
 198                 t->domain_index = n->sid_index;
 199                 sid_peek_rid(&state->sids[i], &t->rid);
 200                 t->unix_id = (uint64_t)-1;
 201         }
 202
 203         child = idmap_child();
 204
 205         subreq = dcerpc_wbint_Sids2UnixIDs_send(
 206                 state, state->ev, child->binding_handle, state->domains,
 207                 &state->ids);
 208         if (tevent_req_nomem(subreq, req)) {
 209                 return;
 210         }
 211         tevent_req_set_callback(subreq, winbindd_sids_to_xids_done, req);
 212 }
 213
 214 static void winbindd_sids_to_xids_done(struct tevent_req *subreq)
 215 {
 216         struct tevent_req *req = tevent_req_callback_data(
 217                 subreq, struct tevent_req);
 218         struct winbindd_sids_to_xids_state *state = tevent_req_data(
 219                 req, struct winbindd_sids_to_xids_state);
 220         NTSTATUS status, result;
 221
 222         status = dcerpc_wbint_Sids2UnixIDs_recv(subreq, state, &result);
 223         TALLOC_FREE(subreq);
 224         if (any_nt_status_not_ok(status, result, &status)) {
 225                 tevent_req_nterror(req, status);
 226                 return;
 227         }
 228         tevent_req_done(req);
 229 }
 230
 231 NTSTATUS winbindd_sids_to_xids_recv(struct tevent_req *req,
 232                                     struct winbindd_response *response)
 233 {
 234         struct winbindd_sids_to_xids_state *state = tevent_req_data(
 235                 req, struct winbindd_sids_to_xids_state);
 236         NTSTATUS status;
 237         char *result;
 238         uint32_t i, num_non_cached;
 239
 240         if (tevent_req_is_nterror(req, &status)) {
 241                 DEBUG(5, ("wb_sids_to_xids failed: %s\n", nt_errstr(status)));
 242                 return status;
 243         }
 244
 245         result = talloc_strdup(response, "");
 246         if (result == NULL) {
 247                 return NT_STATUS_NO_MEMORY;
 248         }
 249
 250         num_non_cached = 0;
 251
 252         for (i=0; i<state->num_sids; i++) {
 253                 char type;
 254                 uint64_t unix_id = (uint64_t)-1;
 255                 bool found = true;
 256
 257                 if (state->cached[i].sid != NULL) {
 258                         unix_id = state->cached[i].xid.id;
 259                         if (state->cached[i].xid.type == ID_TYPE_UID) {
 260                                 type = 'U';
 261                         } else {
 262                                 type = 'G';
 263                         }
 264                 } else {
 265                         unix_id = state->ids.ids[num_non_cached].unix_id;
 266                         switch(state->ids.ids[num_non_cached].type) {
 267                         case WBC_ID_TYPE_UID:
 268                                 type = 'U';
 269                                 idmap_cache_set_sid2uid(
 270                                         &state->non_cached[num_non_cached],
 271                                         unix_id);
 272                                 break;
 273                         case WBC_ID_TYPE_GID:
 274                                 type = 'G';
 275                                 idmap_cache_set_sid2gid(
 276                                         &state->non_cached[num_non_cached],
 277                                         unix_id);
 278                                 break;
 279                         default:
 280                                 found = false;
 281                         }
 282                         num_non_cached += 1;
 283                 }
 284
 285                 if (found) {
 286                         result = talloc_asprintf_append_buffer(
 287                                 result, "%c%lu\n", type,
 288                                 (unsigned long)unix_id);
 289                 } else {
 290                         result = talloc_asprintf_append_buffer(result, "\n");
 291                 }
 292                 if (result == NULL) {
 293                         return NT_STATUS_NO_MEMORY;
 294                 }
 295         }
 296
 297         response->extra_data.data = result;
 298         response->length += talloc_get_size(result);
 299         return NT_STATUS_OK;
 300 }