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         DEBUG(10, ("num_sids: %d\n", (int)state->num_sids));
  82
  83         state->cached = talloc_zero_array(state, struct id_map,
  84                                           state->num_sids);
  85         if (tevent_req_nomem(state->cached, req)) {
  86                 return tevent_req_post(req, ev);
  87         }
  88         state->non_cached = talloc_array(state, struct dom_sid,
  89                                          state->num_sids);
  90         if (tevent_req_nomem(state->non_cached, req)) {
  91                 return tevent_req_post(req, ev);
  92         }
  93
  94         for (i=0; i<state->num_sids; i++) {
  95
  96                 DEBUG(10, ("SID %d: %s\n", (int)i,
  97                            sid_string_dbg(&state->sids[i])));
  98
  99                 if (winbindd_sids_to_xids_in_cache(&state->sids[i],
 100                                                    &state->cached[i])) {
 101                         continue;
 102                 }
 103                 sid_copy(&state->non_cached[state->num_non_cached],
 104                          &state->sids[i]);
 105                 state->num_non_cached += 1;
 106         }
 107
 108         if (state->num_non_cached == 0) {
 109                 tevent_req_done(req);
 110                 return tevent_req_post(req, ev);
 111         }
 112
 113         subreq = wb_lookupsids_send(state, ev, state->non_cached,
 114                                     state->num_non_cached);
 115         if (tevent_req_nomem(subreq, req)) {
 116                 return tevent_req_post(req, ev);
 117         }
 118         tevent_req_set_callback(subreq, winbindd_sids_to_xids_lookupsids_done,
 119                                 req);
 120         return req;
 121 }
 122
 123 static bool winbindd_sids_to_xids_in_cache(struct dom_sid *sid,
 124                                            struct id_map *map)
 125 {
 126         struct unixid id;
 127         bool expired;
 128
 129         if (!winbindd_use_idmap_cache()) {
 130                 return false;
 131         }
 132         if (idmap_cache_find_sid2unixid(sid, &id, &expired)) {
 133                 if (expired && is_domain_online(find_our_domain())) {
 134                         return false;
 135                 }
 136                 map->sid = sid;
 137                 map->xid = id;
 138                 map->status = ID_MAPPED;
 139                 return true;
 140         }
 141         return false;
 142 }
 143
 144
 145 static void winbindd_sids_to_xids_lookupsids_done(struct tevent_req *subreq)
 146 {
 147         struct tevent_req *req = tevent_req_callback_data(
 148                 subreq, struct tevent_req);
 149         struct winbindd_sids_to_xids_state *state = tevent_req_data(
 150                 req, struct winbindd_sids_to_xids_state);
 151         struct winbindd_child *child;
 152         NTSTATUS status;
 153         int i;
 154
 155         status = wb_lookupsids_recv(subreq, state, &state->domains,
 156                                     &state->names);
 157         TALLOC_FREE(subreq);
 158         if (tevent_req_nterror(req, status)) {
 159                 return;
 160         }
 161
 162         state->ids.num_ids = state->num_non_cached;
 163         state->ids.ids = talloc_array(state, struct wbint_TransID,
 164                                       state->num_non_cached);
 165         if (tevent_req_nomem(state->ids.ids, req)) {
 166                 return;
 167         }
 168
 169         for (i=0; i<state->num_non_cached; i++) {
 170                 struct lsa_TranslatedName *n = &state->names->names[i];
 171                 struct wbint_TransID *t = &state->ids.ids[i];
 172
 173                 switch (n->sid_type) {
 174                 case SID_NAME_USER:
 175                 case SID_NAME_COMPUTER:
 176                         t->type = ID_TYPE_UID;
 177                         break;
 178                 case SID_NAME_DOM_GRP:
 179                 case SID_NAME_ALIAS:
 180                 case SID_NAME_WKN_GRP:
 181                         t->type = ID_TYPE_GID;
 182                         break;
 183                 default:
 184                         t->type = ID_TYPE_NOT_SPECIFIED;
 185                         break;
 186                 };
 187                 t->domain_index = n->sid_index;
 188                 sid_peek_rid(&state->non_cached[i], &t->rid);
 189                 t->unix_id = (uint64_t)-1;
 190         }
 191
 192         child = idmap_child();
 193
 194         subreq = dcerpc_wbint_Sids2UnixIDs_send(
 195                 state, state->ev, child->binding_handle, state->domains,
 196                 &state->ids);
 197         if (tevent_req_nomem(subreq, req)) {
 198                 return;
 199         }
 200         tevent_req_set_callback(subreq, winbindd_sids_to_xids_done, req);
 201 }
 202
 203 static void winbindd_sids_to_xids_done(struct tevent_req *subreq)
 204 {
 205         struct tevent_req *req = tevent_req_callback_data(
 206                 subreq, struct tevent_req);
 207         struct winbindd_sids_to_xids_state *state = tevent_req_data(
 208                 req, struct winbindd_sids_to_xids_state);
 209         NTSTATUS status, result;
 210
 211         status = dcerpc_wbint_Sids2UnixIDs_recv(subreq, state, &result);
 212         TALLOC_FREE(subreq);
 213         if (any_nt_status_not_ok(status, result, &status)) {
 214                 tevent_req_nterror(req, status);
 215                 return;
 216         }
 217         tevent_req_done(req);
 218 }
 219
 220 NTSTATUS winbindd_sids_to_xids_recv(struct tevent_req *req,
 221                                     struct winbindd_response *response)
 222 {
 223         struct winbindd_sids_to_xids_state *state = tevent_req_data(
 224                 req, struct winbindd_sids_to_xids_state);
 225         NTSTATUS status;
 226         char *result = NULL;
 227         uint32_t i, num_non_cached;
 228
 229         if (tevent_req_is_nterror(req, &status)) {
 230                 DEBUG(5, ("wb_sids_to_xids failed: %s\n", nt_errstr(status)));
 231                 return status;
 232         }
 233
 234         result = talloc_strdup(response, "");
 235         if (result == NULL) {
 236                 return NT_STATUS_NO_MEMORY;
 237         }
 238
 239         num_non_cached = 0;
 240
 241         for (i=0; i<state->num_sids; i++) {
 242                 char type = '\0';
 243                 uint32_t unix_id = UINT32_MAX;
 244                 bool found = true;
 245
 246                 if (state->cached[i].sid != NULL) {
 247                         unix_id = state->cached[i].xid.id;
 248
 249                         switch (state->cached[i].xid.type) {
 250                         case ID_TYPE_UID:
 251                                 type = 'U';
 252                                 break;
 253                         case ID_TYPE_GID:
 254                                 type = 'G';
 255                                 break;
 256                         case ID_TYPE_BOTH:
 257                                 type = 'B';
 258                                 break;
 259                         default:
 260                                 found = false;
 261                                 break;
 262                         }
 263                 } else {
 264                         struct unixid id;
 265
 266                         unix_id = state->ids.ids[num_non_cached].unix_id;
 267
 268                         id.id = unix_id;
 269                         id.type = state->ids.ids[num_non_cached].type;
 270                         idmap_cache_set_sid2unixid(
 271                                 &state->non_cached[num_non_cached],
 272                                 &id);
 273
 274                         switch (id.type) {
 275                         case ID_TYPE_UID:
 276                                 type = 'U';
 277                                 break;
 278                         case ID_TYPE_GID:
 279                                 type = 'G';
 280                                 break;
 281                         case ID_TYPE_BOTH:
 282                                 type = 'B';
 283                                 break;
 284                         default:
 285                                 found = false;
 286                                 break;
 287                         }
 288                         num_non_cached += 1;
 289                 }
 290
 291                 if (unix_id == UINT32_MAX) {
 292                         found = false;
 293                 }
 294
 295                 if (found) {
 296                         result = talloc_asprintf_append_buffer(
 297                                 result, "%c%lu\n", type,
 298                                 (unsigned long)unix_id);
 299                 } else {
 300                         result = talloc_asprintf_append_buffer(result, "\n");
 301                 }
 302                 if (result == NULL) {
 303                         return NT_STATUS_NO_MEMORY;
 304                 }
 305         }
 306
 307         response->extra_data.data = result;
 308         response->length += talloc_get_size(result);
 309         return NT_STATUS_OK;
 310 }