source3/winbindd/wb_queryuser.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async queryuser
   4    Copyright (C) Volker Lendecke 2009
   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 "util/debug.h"
  22 #include "winbindd.h"
  23 #include "librpc/gen_ndr/ndr_winbind_c.h"
  24 #include "../libcli/security/security.h"
  25 #include "libsmb/samlogon_cache.h"
  26 #include "librpc/gen_ndr/ndr_winbind.h"
  27
  28 struct wb_queryuser_state {
  29         struct tevent_context *ev;
  30         struct wbint_userinfo *info;
  31         const struct wb_parent_idmap_config *idmap_cfg;
  32         bool tried_dclookup;
  33 };
  34
  35 static void wb_queryuser_idmap_setup_done(struct tevent_req *subreq);
  36 static void wb_queryuser_got_uid(struct tevent_req *subreq);
  37 static void wb_queryuser_got_domain(struct tevent_req *subreq);
  38 static void wb_queryuser_got_dc(struct tevent_req *subreq);
  39 static void wb_queryuser_got_gid(struct tevent_req *subreq);
  40 static void wb_queryuser_got_group_name(struct tevent_req *subreq);
  41 static void wb_queryuser_done(struct tevent_req *subreq);
  42
  43 struct tevent_req *wb_queryuser_send(TALLOC_CTX *mem_ctx,
  44                                      struct tevent_context *ev,
  45                                      const struct dom_sid *user_sid)
  46 {
  47         struct tevent_req *req, *subreq;
  48         struct wb_queryuser_state *state;
  49         struct wbint_userinfo *info;
  50         struct dom_sid_buf buf;
  51
  52         req = tevent_req_create(mem_ctx, &state, struct wb_queryuser_state);
  53         if (req == NULL) {
  54                 return NULL;
  55         }
  56         D_INFO("WB command queryuser start.\nQuery user sid %s\n",
  57                dom_sid_str_buf(user_sid, &buf));
  58         state->ev = ev;
  59
  60         state->info = talloc_zero(state, struct wbint_userinfo);
  61         if (tevent_req_nomem(state->info, req)) {
  62                 return tevent_req_post(req, ev);
  63         }
  64         info = state->info;
  65
  66         info->primary_gid = (gid_t)-1;
  67
  68         sid_copy(&info->user_sid, user_sid);
  69
  70         subreq = wb_parent_idmap_setup_send(state, state->ev);
  71         if (tevent_req_nomem(subreq, req)) {
  72                 return tevent_req_post(req, ev);
  73         }
  74         tevent_req_set_callback(subreq, wb_queryuser_idmap_setup_done, req);
  75         return req;
  76 }
  77
  78 static void wb_queryuser_idmap_setup_done(struct tevent_req *subreq)
  79 {
  80         struct tevent_req *req = tevent_req_callback_data(
  81                 subreq, struct tevent_req);
  82         struct wb_queryuser_state *state = tevent_req_data(
  83                 req, struct wb_queryuser_state);
  84         NTSTATUS status;
  85         struct dom_sid_buf buf;
  86
  87         status = wb_parent_idmap_setup_recv(subreq, &state->idmap_cfg);
  88         TALLOC_FREE(subreq);
  89         if (tevent_req_nterror(req, status)) {
  90                 D_WARNING("wb_parent_idmap_setup_recv() failed with %s.\n",
  91                           nt_errstr(status));
  92                 return;
  93         }
  94
  95         D_DEBUG("Convert the user SID %s to XID.\n",
  96                 dom_sid_str_buf(&state->info->user_sid, &buf));
  97         subreq = wb_sids2xids_send(
  98                 state, state->ev, &state->info->user_sid, 1);
  99         if (tevent_req_nomem(subreq, req)) {
 100                 return;
 101         }
 102         tevent_req_set_callback(subreq, wb_queryuser_got_uid, req);
 103         return;
 104 }
 105
 106 static void wb_queryuser_got_uid(struct tevent_req *subreq)
 107 {
 108         struct tevent_req *req = tevent_req_callback_data(
 109                 subreq, struct tevent_req);
 110         struct wb_queryuser_state *state = tevent_req_data(
 111                 req, struct wb_queryuser_state);
 112         struct wbint_userinfo *info = state->info;
 113         struct netr_SamInfo3 *info3;
 114         struct dcerpc_binding_handle *child_binding_handle = NULL;
 115         struct unixid xid;
 116         NTSTATUS status;
 117         struct dom_sid_buf buf, buf1;
 118
 119         status = wb_sids2xids_recv(subreq, &xid, 1);
 120         TALLOC_FREE(subreq);
 121         if (tevent_req_nterror(req, status)) {
 122                 D_WARNING("wb_sids2xids_recv() failed with %s.\n",
 123                           nt_errstr(status));
 124                 return;
 125         }
 126
 127         if ((xid.type != ID_TYPE_UID) && (xid.type != ID_TYPE_BOTH)) {
 128                 D_WARNING("XID type is %d, should be ID_TYPE_UID or ID_TYPE_BOTH.\n",
 129                           xid.type);
 130                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
 131                 return;
 132         }
 133
 134         D_DEBUG("Received XID %"PRIu32" for SID %s.\n",
 135                 xid.id,
 136                 dom_sid_str_buf(&info->user_sid, &buf1));
 137         info->uid = xid.id;
 138
 139         /*
 140          * Default the group sid to "Domain Users" in the user's
 141          * domain. The samlogon cache or the query_user call later on
 142          * can override this.
 143          */
 144         sid_copy(&info->group_sid, &info->user_sid);
 145         sid_split_rid(&info->group_sid, NULL);
 146         sid_append_rid(&info->group_sid, DOMAIN_RID_USERS);
 147
 148         D_DEBUG("Preconfigured 'Domain Users' RID %u was used to create group SID %s from user SID %s.\n",
 149                 DOMAIN_RID_USERS,
 150                 dom_sid_str_buf(&info->group_sid, &buf),
 151                 dom_sid_str_buf(&info->user_sid, &buf1));
 152
 153         info->homedir = talloc_strdup(info, lp_template_homedir());
 154         D_DEBUG("Setting 'homedir' to the template '%s'.\n", info->homedir);
 155         if (tevent_req_nomem(info->homedir, req)) {
 156                 return;
 157         }
 158
 159         info->shell = talloc_strdup(info, lp_template_shell());
 160         D_DEBUG("Setting 'shell' to the template '%s'.\n", info->shell);
 161         if (tevent_req_nomem(info->shell, req)) {
 162                 return;
 163         }
 164
 165         info3 = netsamlogon_cache_get(state, &info->user_sid);
 166         if (info3 != NULL) {
 167                 D_DEBUG("Filling data received from netsamlogon_cache\n");
 168                 sid_compose(&info->group_sid, info3->base.domain_sid,
 169                             info3->base.primary_gid);
 170                 info->acct_name = talloc_move(
 171                         info, &info3->base.account_name.string);
 172                 info->full_name = talloc_move(
 173                         info, &info3->base.full_name.string);
 174
 175                 info->domain_name = talloc_move(
 176                         state, &info3->base.logon_domain.string);
 177
 178                 TALLOC_FREE(info3);
 179         }
 180
 181         NDR_PRINT_DEBUG_LEVEL(DBGLVL_DEBUG, wbint_userinfo, state->info);
 182         if (info->domain_name == NULL) {
 183                 D_DEBUG("Domain name is empty, calling wb_lookupsid_send() to get it.\n");
 184                 subreq = wb_lookupsid_send(state, state->ev, &info->user_sid);
 185                 if (tevent_req_nomem(subreq, req)) {
 186                         return;
 187                 }
 188                 tevent_req_set_callback(subreq, wb_queryuser_got_domain, req);
 189                 return;
 190         }
 191
 192         /*
 193          * Note wb_sids2xids_send/recv was called before,
 194          * so we're sure that wb_parent_idmap_setup_send/recv
 195          * was already called.
 196          */
 197         child_binding_handle = idmap_child_handle();
 198         D_DEBUG("Domain name is set, calling dcerpc_wbint_GetNssInfo_send()\n");
 199         subreq = dcerpc_wbint_GetNssInfo_send(
 200                 state, state->ev, child_binding_handle, info);
 201         if (tevent_req_nomem(subreq, req)) {
 202                 return;
 203         }
 204         tevent_req_set_callback(subreq, wb_queryuser_done, req);
 205 }
 206
 207 static void wb_queryuser_got_domain(struct tevent_req *subreq)
 208 {
 209         struct tevent_req *req = tevent_req_callback_data(
 210                 subreq, struct tevent_req);
 211         struct wb_queryuser_state *state = tevent_req_data(
 212                 req, struct wb_queryuser_state);
 213         struct wbint_userinfo *info = state->info;
 214         enum lsa_SidType type;
 215         struct dcerpc_binding_handle *child_binding_handle = NULL;
 216         NTSTATUS status;
 217
 218         status = wb_lookupsid_recv(subreq, state, &type,
 219                                    &info->domain_name, &info->acct_name);
 220         TALLOC_FREE(subreq);
 221         if (tevent_req_nterror(req, status)) {
 222                 D_WARNING("wb_lookupsid_recv failed with %s.\n",
 223                           nt_errstr(status));
 224                 return;
 225         }
 226
 227         NDR_PRINT_DEBUG_LEVEL(DBGLVL_DEBUG, wbint_userinfo, state->info);
 228         switch (type) {
 229         case SID_NAME_USER:
 230         case SID_NAME_COMPUTER:
 231                 /*
 232                  * user case: we only need the account name from lookup_sids
 233                  */
 234                 break;
 235         case SID_NAME_DOM_GRP:
 236         case SID_NAME_ALIAS:
 237         case SID_NAME_WKN_GRP:
 238                 /*
 239                  * also treat group-type SIDs (they might map to ID_TYPE_BOTH)
 240                  */
 241                 sid_copy(&info->group_sid, &info->user_sid);
 242                 break;
 243         default:
 244                 D_WARNING("Unknown type:%d, return NT_STATUS_NO_SUCH_USER.\n",
 245                           type);
 246                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
 247                 return;
 248         }
 249
 250         /*
 251          * Note wb_sids2xids_send/recv was called before,
 252          * so we're sure that wb_parent_idmap_setup_send/recv
 253          * was already called.
 254          */
 255         child_binding_handle = idmap_child_handle();
 256         D_DEBUG("About to call dcerpc_wbint_GetNssInfo_send()\n");
 257         subreq = dcerpc_wbint_GetNssInfo_send(
 258                 state, state->ev, child_binding_handle, info);
 259         if (tevent_req_nomem(subreq, req)) {
 260                 return;
 261         }
 262         tevent_req_set_callback(subreq, wb_queryuser_done, req);
 263 }
 264
 265 static void wb_queryuser_done(struct tevent_req *subreq)
 266 {
 267         struct tevent_req *req = tevent_req_callback_data(
 268                 subreq, struct tevent_req);
 269         struct wb_queryuser_state *state = tevent_req_data(
 270                 req, struct wb_queryuser_state);
 271         struct wbint_userinfo *info = state->info;
 272         NTSTATUS status, result;
 273         bool need_group_name = false;
 274         const char *tmpl = NULL;
 275
 276         status = dcerpc_wbint_GetNssInfo_recv(subreq, info, &result);
 277         TALLOC_FREE(subreq);
 278         if (tevent_req_nterror(req, status)) {
 279                 D_WARNING("GetNssInfo failed with %s.\n", nt_errstr(status));
 280                 return;
 281         }
 282
 283         if (NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) &&
 284             !state->tried_dclookup) {
 285                 D_DEBUG("GetNssInfo got DOMAIN_CONTROLLER_NOT_FOUND, calling wb_dsgetdcname_send()\n");
 286                 subreq = wb_dsgetdcname_send(
 287                         state, state->ev, state->info->domain_name, NULL, NULL,
 288                         DS_RETURN_DNS_NAME);
 289                 if (tevent_req_nomem(subreq, req)) {
 290                         return;
 291                 }
 292                 tevent_req_set_callback(subreq, wb_queryuser_got_dc, req);
 293                 return;
 294         }
 295
 296         /*
 297          * Ignore failure in "result" here. We'll try to fill in stuff
 298          * that misses further down.
 299          */
 300
 301         if (state->info->primary_gid == (gid_t)-1) {
 302                 D_DEBUG("Calling wb_sids2xids_send() to resolve primary gid.\n");
 303                 subreq = wb_sids2xids_send(
 304                         state, state->ev, &info->group_sid, 1);
 305                 if (tevent_req_nomem(subreq, req)) {
 306                         return;
 307                 }
 308                 tevent_req_set_callback(subreq, wb_queryuser_got_gid, req);
 309                 return;
 310         }
 311
 312         tmpl = lp_template_homedir();
 313         if(strstr_m(tmpl, "%g") || strstr_m(tmpl, "%G")) {
 314                 need_group_name = true;
 315         }
 316         tmpl = lp_template_shell();
 317         if(strstr_m(tmpl, "%g") || strstr_m(tmpl, "%G")) {
 318                 need_group_name = true;
 319         }
 320
 321         if (need_group_name && state->info->primary_group_name == NULL) {
 322                 D_DEBUG("Calling wb_lookupsid_send() to resolve primary group name.\n");
 323                 subreq = wb_lookupsid_send(state, state->ev, &info->group_sid);
 324                 if (tevent_req_nomem(subreq, req)) {
 325                         return;
 326                 }
 327                 tevent_req_set_callback(subreq, wb_queryuser_got_group_name,
 328                                         req);
 329                 return;
 330         }
 331
 332         NDR_PRINT_DEBUG_LEVEL(DBGLVL_DEBUG, wbint_userinfo, state->info);
 333         tevent_req_done(req);
 334 }
 335
 336 static void wb_queryuser_got_dc(struct tevent_req *subreq)
 337 {
 338         struct tevent_req *req = tevent_req_callback_data(
 339                 subreq, struct tevent_req);
 340         struct wb_queryuser_state *state = tevent_req_data(
 341                 req, struct wb_queryuser_state);
 342         struct wbint_userinfo *info = state->info;
 343         struct netr_DsRGetDCNameInfo *dcinfo;
 344         struct dcerpc_binding_handle *child_binding_handle = NULL;
 345         NTSTATUS status;
 346
 347         status = wb_dsgetdcname_recv(subreq, state, &dcinfo);
 348         TALLOC_FREE(subreq);
 349         if (tevent_req_nterror(req, status)) {
 350                 D_WARNING("wb_dsgetdcname_recv() failed with %s.\n",
 351                           nt_errstr(status));
 352                 return;
 353         }
 354
 355         state->tried_dclookup = true;
 356
 357         D_DEBUG("Got DC name, calling wb_dsgetdcname_gencache_set().\n");
 358         status = wb_dsgetdcname_gencache_set(info->domain_name, dcinfo);
 359         if (tevent_req_nterror(req, status)) {
 360                 D_WARNING("wb_dsgetdcname_gencache_set() failed with %s.\n",
 361                           nt_errstr(status));
 362                 return;
 363         }
 364         NDR_PRINT_DEBUG_LEVEL(DBGLVL_DEBUG, wbint_userinfo, state->info);
 365
 366         /*
 367          * Note wb_sids2xids_send/recv was called before,
 368          * so we're sure that wb_parent_idmap_setup_send/recv
 369          * was already called.
 370          */
 371         child_binding_handle = idmap_child_handle();
 372         subreq = dcerpc_wbint_GetNssInfo_send(
 373                 state, state->ev, child_binding_handle, info);
 374         if (tevent_req_nomem(subreq, req)) {
 375                 return;
 376         }
 377         tevent_req_set_callback(subreq, wb_queryuser_done, req);
 378 }
 379
 380 static void wb_queryuser_got_gid(struct tevent_req *subreq)
 381 {
 382         struct tevent_req *req = tevent_req_callback_data(
 383                 subreq, struct tevent_req);
 384         struct wb_queryuser_state *state = tevent_req_data(
 385                 req, struct wb_queryuser_state);
 386         struct unixid xid;
 387         NTSTATUS status;
 388         bool need_group_name = false;
 389         const char *tmpl = NULL;
 390         struct dom_sid_buf buf;
 391
 392         status = wb_sids2xids_recv(subreq, &xid, 1);
 393         TALLOC_FREE(subreq);
 394         if (tevent_req_nterror(req, status)) {
 395                 D_WARNING("wb_sids2xids_recv() failed with %s.\n",
 396                           nt_errstr(status));
 397                 return;
 398         }
 399
 400         D_DEBUG("Got XID %"PRIu32" with type %d.\n", xid.id, xid.type);
 401         if ((xid.type != ID_TYPE_GID) && (xid.type != ID_TYPE_BOTH)) {
 402                 D_WARNING("Returning NT_STATUS_NO_SUCH_USER\n"
 403                           "xid.type must be ID_TYPE_UID or ID_TYPE_BOTH.\n");
 404                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
 405                 return;
 406         }
 407
 408         state->info->primary_gid = xid.id;
 409
 410         tmpl = lp_template_homedir();
 411         if(strstr_m(tmpl, "%g") || strstr_m(tmpl, "%G")) {
 412                 need_group_name = true;
 413         }
 414         tmpl = lp_template_shell();
 415         if(strstr_m(tmpl, "%g") || strstr_m(tmpl, "%G")) {
 416                 need_group_name = true;
 417         }
 418
 419         NDR_PRINT_DEBUG_LEVEL(DBGLVL_DEBUG, wbint_userinfo, state->info);
 420
 421         if (need_group_name && state->info->primary_group_name == NULL) {
 422                 D_DEBUG("Calling wb_lookupsid_send for group SID %s.\n",
 423                           dom_sid_str_buf(&state->info->group_sid, &buf));
 424                 subreq = wb_lookupsid_send(state, state->ev,
 425                                            &state->info->group_sid);
 426                 if (tevent_req_nomem(subreq, req)) {
 427                         return;
 428                 }
 429                 tevent_req_set_callback(subreq, wb_queryuser_got_group_name,
 430                                         req);
 431                 return;
 432         }
 433
 434         D_DEBUG("No need to lookup primary group name. Request is done!\n");
 435         tevent_req_done(req);
 436 }
 437
 438 static void wb_queryuser_got_group_name(struct tevent_req *subreq)
 439 {
 440         struct tevent_req *req = tevent_req_callback_data(
 441                 subreq, struct tevent_req);
 442         struct wb_queryuser_state *state = tevent_req_data(
 443                 req, struct wb_queryuser_state);
 444         enum lsa_SidType type;
 445         NTSTATUS status;
 446         const char *domain_name;
 447
 448         status = wb_lookupsid_recv(subreq, state->info, &type, &domain_name,
 449                                    &state->info->primary_group_name);
 450         TALLOC_FREE(subreq);
 451         if (tevent_req_nterror(req, status)) {
 452                 D_WARNING("wb_lookupsid_recv() failed with %s.\n",
 453                           nt_errstr(status));
 454                 return;
 455         }
 456         tevent_req_done(req);
 457 }
 458
 459 NTSTATUS wb_queryuser_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 460                            struct wbint_userinfo **pinfo)
 461 {
 462         struct wb_queryuser_state *state = tevent_req_data(
 463                 req, struct wb_queryuser_state);
 464         NTSTATUS status;
 465
 466         D_INFO("WB command queryuser end.\n");
 467         NDR_PRINT_DEBUG_LEVEL(DBGLVL_INFO, wbint_userinfo, state->info);
 468         if (tevent_req_is_nterror(req, &status)) {
 469                 return status;
 470         }
 471         *pinfo = talloc_move(mem_ctx, &state->info);
 472         return NT_STATUS_OK;
 473 }