source3/winbindd/winbindd_idmap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Async helpers for blocking functions
   5
   6    Copyright (C) Volker Lendecke 2005
   7    Copyright (C) Gerald Carter 2006
   8    Copyright (C) Simo Sorce 2007
   9
  10    The helpers always consist of three functions:
  11
  12    * A request setup function that takes the necessary parameters together
  13      with a continuation function that is to be called upon completion
  14
  15    * A private continuation function that is internal only. This is to be
  16      called by the lower-level functions in do_async(). Its only task is to
  17      properly call the continuation function named above.
  18
  19    * A worker function that is called inside the appropriate child process.
  20
  21    This program is free software; you can redistribute it and/or modify
  22    it under the terms of the GNU General Public License as published by
  23    the Free Software Foundation; either version 3 of the License, or
  24    (at your option) any later version.
  25
  26    This program is distributed in the hope that it will be useful,
  27    but WITHOUT ANY WARRANTY; without even the implied warranty of
  28    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  29    GNU General Public License for more details.
  30
  31    You should have received a copy of the GNU General Public License
  32    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  33 */
  34
  35 #include "includes.h"
  36 #include "winbindd.h"
  37
  38 #undef DBGC_CLASS
  39 #define DBGC_CLASS DBGC_WINBIND
  40
  41 static struct winbindd_child static_idmap_child;
  42
  43 struct winbindd_child *idmap_child(void)
  44 {
  45         return &static_idmap_child;
  46 }
  47
  48 static void winbindd_remove_mapping_recv(TALLOC_CTX *mem_ctx, bool success,
  49                                    struct winbindd_response *response,
  50                                    void *c, void *private_data)
  51 {
  52         void (*cont)(void *priv, bool succ) = (void (*)(void *, bool))c;
  53
  54         if (!success) {
  55                 DEBUG(5, ("Could not trigger idmap_remove_mapping\n"));
  56                 cont(private_data, False);
  57                 return;
  58         }
  59
  60         if (response->result != WINBINDD_OK) {
  61                 DEBUG(5, ("idmap_remove_mapping returned an error\n"));
  62                 cont(private_data, False);
  63                 return;
  64         }
  65
  66         cont(private_data, True);
  67 }
  68
  69 void winbindd_remove_mapping_async(TALLOC_CTX *mem_ctx,
  70                              const struct id_map *map,
  71                              void (*cont)(void *private_data, bool success),
  72                              void *private_data)
  73 {
  74         struct winbindd_request request;
  75         ZERO_STRUCT(request);
  76         request.cmd = WINBINDD_DUAL_REMOVE_MAPPING;
  77         request.data.dual_idmapset.id = map->xid.id;
  78         request.data.dual_idmapset.type = map->xid.type;
  79         sid_to_fstring(request.data.dual_idmapset.sid, map->sid);
  80
  81         do_async(mem_ctx, idmap_child(), &request, winbindd_remove_mapping_recv,
  82                  (void *)cont, private_data);
  83 }
  84
  85 enum winbindd_result winbindd_dual_remove_mapping(
  86                                             struct winbindd_domain *domain,
  87                                             struct winbindd_cli_state *state)
  88 {
  89         struct id_map map;
  90         DOM_SID sid;
  91         NTSTATUS result;
  92
  93         DEBUG(3, ("[%5lu]: dual_idmapremove\n", (unsigned long)state->pid));
  94
  95         if (!string_to_sid(&sid, state->request->data.dual_idmapset.sid))
  96                 return WINBINDD_ERROR;
  97
  98         map.sid = &sid;
  99         map.xid.id = state->request->data.dual_idmapset.id;
 100         map.xid.type = state->request->data.dual_idmapset.type;
 101         map.status = ID_MAPPED;
 102
 103         result = idmap_remove_mapping(&map);
 104         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 105 }
 106
 107 static void winbindd_set_hwm_recv(TALLOC_CTX *mem_ctx, bool success,
 108                                    struct winbindd_response *response,
 109                                    void *c, void *private_data)
 110 {
 111         void (*cont)(void *priv, bool succ) = (void (*)(void *, bool))c;
 112
 113         if (!success) {
 114                 DEBUG(5, ("Could not trigger idmap_set_hwm\n"));
 115                 cont(private_data, False);
 116                 return;
 117         }
 118
 119         if (response->result != WINBINDD_OK) {
 120                 DEBUG(5, ("idmap_set_hwm returned an error\n"));
 121                 cont(private_data, False);
 122                 return;
 123         }
 124
 125         cont(private_data, True);
 126 }
 127
 128 void winbindd_set_hwm_async(TALLOC_CTX *mem_ctx, const struct unixid *xid,
 129                              void (*cont)(void *private_data, bool success),
 130                              void *private_data)
 131 {
 132         struct winbindd_request request;
 133         ZERO_STRUCT(request);
 134         request.cmd = WINBINDD_DUAL_SET_HWM;
 135         request.data.dual_idmapset.id = xid->id;
 136         request.data.dual_idmapset.type = xid->type;
 137
 138         do_async(mem_ctx, idmap_child(), &request, winbindd_set_hwm_recv,
 139                  (void *)cont, private_data);
 140 }
 141
 142 enum winbindd_result winbindd_dual_set_hwm(struct winbindd_domain *domain,
 143                                             struct winbindd_cli_state *state)
 144 {
 145         struct unixid xid;
 146         NTSTATUS result;
 147
 148         DEBUG(3, ("[%5lu]: dual_set_hwm\n", (unsigned long)state->pid));
 149
 150         xid.id = state->request->data.dual_idmapset.id;
 151         xid.type = state->request->data.dual_idmapset.type;
 152
 153         switch (xid.type) {
 154         case ID_TYPE_UID:
 155                 result = idmap_set_uid_hwm(&xid);
 156                 break;
 157         case ID_TYPE_GID:
 158                 result = idmap_set_gid_hwm(&xid);
 159                 break;
 160         default:
 161                 return WINBINDD_ERROR;
 162         }
 163         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 164 }
 165
 166 static void winbindd_sid2uid_recv(TALLOC_CTX *mem_ctx, bool success,
 167                                struct winbindd_response *response,
 168                                void *c, void *private_data)
 169 {
 170         void (*cont)(void *priv, bool succ, uid_t uid) =
 171                 (void (*)(void *, bool, uid_t))c;
 172
 173         if (!success) {
 174                 DEBUG(5, ("Could not trigger sid2uid\n"));
 175                 cont(private_data, False, 0);
 176                 return;
 177         }
 178
 179         if (response->result != WINBINDD_OK) {
 180                 DEBUG(5, ("sid2uid returned an error\n"));
 181                 cont(private_data, False, 0);
 182                 return;
 183         }
 184
 185         cont(private_data, True, response->data.uid);
 186 }
 187
 188 void winbindd_sid2uid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 189                          void (*cont)(void *private_data, bool success, uid_t uid),
 190                          void *private_data)
 191 {
 192         struct winbindd_request request;
 193         struct winbindd_domain *domain;
 194
 195         ZERO_STRUCT(request);
 196         request.cmd = WINBINDD_DUAL_SID2UID;
 197
 198         domain = find_domain_from_sid(sid);
 199
 200         if (domain != NULL) {
 201                 DEBUG(10, ("winbindd_sid2uid_async found domain %s, "
 202                            "have_idmap_config = %d\n", domain->name,
 203                            (int)domain->have_idmap_config));
 204
 205         }
 206         else {
 207                 DEBUG(10, ("winbindd_sid2uid_async did not find a domain for "
 208                            "%s\n", sid_string_dbg(sid)));
 209         }
 210
 211         if ((domain != NULL) && (domain->have_idmap_config)) {
 212                 fstrcpy(request.domain_name, domain->name);
 213         }
 214
 215         sid_to_fstring(request.data.dual_sid2id.sid, sid);
 216         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2uid_recv,
 217                  (void *)cont, private_data);
 218 }
 219
 220 enum winbindd_result winbindd_dual_sid2uid(struct winbindd_domain *domain,
 221                                            struct winbindd_cli_state *state)
 222 {
 223         DOM_SID sid;
 224         NTSTATUS result;
 225
 226         DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
 227                   state->request->data.dual_sid2id.sid));
 228
 229         if (!string_to_sid(&sid, state->request->data.dual_sid2id.sid)) {
 230                 DEBUG(1, ("Could not get convert sid %s from string\n",
 231                           state->request->data.dual_sid2id.sid));
 232                 return WINBINDD_ERROR;
 233         }
 234
 235         result = idmap_sid_to_uid(state->request->domain_name, &sid,
 236                                   &state->response->data.uid);
 237
 238         DEBUG(10, ("winbindd_dual_sid2uid: 0x%08x - %s - %u\n",
 239                    NT_STATUS_V(result), sid_string_dbg(&sid),
 240                    (unsigned int)state->response->data.uid));
 241
 242         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 243 }
 244
 245 static void winbindd_sid2gid_recv(TALLOC_CTX *mem_ctx, bool success,
 246                                struct winbindd_response *response,
 247                                void *c, void *private_data)
 248 {
 249         void (*cont)(void *priv, bool succ, gid_t gid) =
 250                 (void (*)(void *, bool, gid_t))c;
 251
 252         if (!success) {
 253                 DEBUG(5, ("Could not trigger sid2gid\n"));
 254                 cont(private_data, False, 0);
 255                 return;
 256         }
 257
 258         if (response->result != WINBINDD_OK) {
 259                 DEBUG(5, ("sid2gid returned an error\n"));
 260                 cont(private_data, False, 0);
 261                 return;
 262         }
 263
 264         cont(private_data, True, response->data.gid);
 265 }
 266
 267 void winbindd_sid2gid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 268                          void (*cont)(void *private_data, bool success, gid_t gid),
 269                          void *private_data)
 270 {
 271         struct winbindd_request request;
 272         struct winbindd_domain *domain;
 273
 274         ZERO_STRUCT(request);
 275         request.cmd = WINBINDD_DUAL_SID2GID;
 276
 277         domain = find_domain_from_sid(sid);
 278         if ((domain != NULL) && (domain->have_idmap_config)) {
 279                 fstrcpy(request.domain_name, domain->name);
 280         }
 281
 282         sid_to_fstring(request.data.dual_sid2id.sid, sid);
 283
 284         DEBUG(7,("winbindd_sid2gid_async: Resolving %s to a gid\n",
 285                 request.data.dual_sid2id.sid));
 286
 287         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2gid_recv,
 288                  (void *)cont, private_data);
 289 }
 290
 291 enum winbindd_result winbindd_dual_sid2gid(struct winbindd_domain *domain,
 292                                            struct winbindd_cli_state *state)
 293 {
 294         DOM_SID sid;
 295         NTSTATUS result;
 296
 297         DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
 298                   state->request->data.dual_sid2id.sid));
 299
 300         if (!string_to_sid(&sid, state->request->data.dual_sid2id.sid)) {
 301                 DEBUG(1, ("Could not get convert sid %s from string\n",
 302                           state->request->data.dual_sid2id.sid));
 303                 return WINBINDD_ERROR;
 304         }
 305
 306         /* Find gid for this sid and return it, possibly ask the slow remote idmap */
 307
 308         result = idmap_sid_to_gid(state->request->domain_name, &sid,
 309                                   &state->response->data.gid);
 310
 311         DEBUG(10, ("winbindd_dual_sid2gid: 0x%08x - %s - %u\n",
 312                    NT_STATUS_V(result), sid_string_dbg(&sid),
 313                    (unsigned int)state->response->data.gid));
 314
 315         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 316 }
 317
 318 /* The following uid2sid/gid2sid functions has been contributed by
 319  * Keith Reynolds <Keith.Reynolds@centrify.com> */
 320
 321 static void winbindd_uid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 322                                   struct winbindd_response *response,
 323                                   void *c, void *private_data)
 324 {
 325         void (*cont)(void *priv, bool succ, const char *sid) =
 326                 (void (*)(void *, bool, const char *))c;
 327
 328         if (!success) {
 329                 DEBUG(5, ("Could not trigger uid2sid\n"));
 330                 cont(private_data, False, NULL);
 331                 return;
 332         }
 333
 334         if (response->result != WINBINDD_OK) {
 335                 DEBUG(5, ("uid2sid returned an error\n"));
 336                 cont(private_data, False, NULL);
 337                 return;
 338         }
 339
 340         cont(private_data, True, response->data.sid.sid);
 341 }
 342
 343 void winbindd_uid2sid_async(TALLOC_CTX *mem_ctx, uid_t uid,
 344                             void (*cont)(void *private_data, bool success, const char *sid),
 345                             void *private_data)
 346 {
 347         struct winbindd_domain *domain;
 348         struct winbindd_request request;
 349
 350         ZERO_STRUCT(request);
 351         request.cmd = WINBINDD_DUAL_UID2SID;
 352         request.data.uid = uid;
 353
 354         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 355                 if (domain->have_idmap_config
 356                     && (uid >= domain->id_range_low)
 357                     && (uid <= domain->id_range_high)) {
 358                         fstrcpy(request.domain_name, domain->name);
 359                 }
 360         }
 361
 362         do_async(mem_ctx, idmap_child(), &request, winbindd_uid2sid_recv,
 363                  (void *)cont, private_data);
 364 }
 365
 366 enum winbindd_result winbindd_dual_uid2sid(struct winbindd_domain *domain,
 367                                            struct winbindd_cli_state *state)
 368 {
 369         DOM_SID sid;
 370         NTSTATUS result;
 371
 372         DEBUG(3,("[%5lu]: uid to sid %lu\n",
 373                  (unsigned long)state->pid,
 374                  (unsigned long) state->request->data.uid));
 375
 376         /* Find sid for this uid and return it, possibly ask the slow remote idmap */
 377         result = idmap_uid_to_sid(state->request->domain_name, &sid,
 378                                   state->request->data.uid);
 379
 380         if (NT_STATUS_IS_OK(result)) {
 381                 sid_to_fstring(state->response->data.sid.sid, &sid);
 382                 state->response->data.sid.type = SID_NAME_USER;
 383                 return WINBINDD_OK;
 384         }
 385
 386         return WINBINDD_ERROR;
 387 }
 388
 389 static void winbindd_gid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 390                                   struct winbindd_response *response,
 391                                   void *c, void *private_data)
 392 {
 393         void (*cont)(void *priv, bool succ, const char *sid) =
 394                 (void (*)(void *, bool, const char *))c;
 395
 396         if (!success) {
 397                 DEBUG(5, ("Could not trigger gid2sid\n"));
 398                 cont(private_data, False, NULL);
 399                 return;
 400         }
 401
 402         if (response->result != WINBINDD_OK) {
 403                 DEBUG(5, ("gid2sid returned an error\n"));
 404                 cont(private_data, False, NULL);
 405                 return;
 406         }
 407
 408         cont(private_data, True, response->data.sid.sid);
 409 }
 410
 411 void winbindd_gid2sid_async(TALLOC_CTX *mem_ctx, gid_t gid,
 412                             void (*cont)(void *private_data, bool success, const char *sid),
 413                             void *private_data)
 414 {
 415         struct winbindd_domain *domain;
 416         struct winbindd_request request;
 417
 418         ZERO_STRUCT(request);
 419         request.cmd = WINBINDD_DUAL_GID2SID;
 420         request.data.gid = gid;
 421
 422         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 423                 if (domain->have_idmap_config
 424                     && (gid >= domain->id_range_low)
 425                     && (gid <= domain->id_range_high)) {
 426                         fstrcpy(request.domain_name, domain->name);
 427                 }
 428         }
 429
 430         do_async(mem_ctx, idmap_child(), &request, winbindd_gid2sid_recv,
 431                  (void *)cont, private_data);
 432 }
 433
 434 enum winbindd_result winbindd_dual_gid2sid(struct winbindd_domain *domain,
 435                                            struct winbindd_cli_state *state)
 436 {
 437         DOM_SID sid;
 438         NTSTATUS result;
 439
 440         DEBUG(3,("[%5lu]: gid %lu to sid\n",
 441                 (unsigned long)state->pid,
 442                 (unsigned long) state->request->data.gid));
 443
 444         /* Find sid for this gid and return it, possibly ask the slow remote idmap */
 445         result = idmap_gid_to_sid(state->request->domain_name, &sid,
 446                                   state->request->data.gid);
 447
 448         if (NT_STATUS_IS_OK(result)) {
 449                 sid_to_fstring(state->response->data.sid.sid, &sid);
 450                 DEBUG(10, ("[%5lu]: retrieved sid: %s\n",
 451                            (unsigned long)state->pid,
 452                            state->response->data.sid.sid));
 453                 state->response->data.sid.type = SID_NAME_DOM_GRP;
 454                 return WINBINDD_OK;
 455         }
 456
 457         return WINBINDD_ERROR;
 458 }
 459
 460 static const struct winbindd_child_dispatch_table idmap_dispatch_table[] = {
 461         {
 462                 .name           = "PING",
 463                 .struct_cmd     = WINBINDD_PING,
 464                 .struct_fn      = winbindd_dual_ping,
 465         },{
 466                 .name           = "DUAL_SID2UID",
 467                 .struct_cmd     = WINBINDD_DUAL_SID2UID,
 468                 .struct_fn      = winbindd_dual_sid2uid,
 469         },{
 470                 .name           = "DUAL_SID2GID",
 471                 .struct_cmd     = WINBINDD_DUAL_SID2GID,
 472                 .struct_fn      = winbindd_dual_sid2gid,
 473         },{
 474                 .name           = "DUAL_UID2SID",
 475                 .struct_cmd     = WINBINDD_DUAL_UID2SID,
 476                 .struct_fn      = winbindd_dual_uid2sid,
 477         },{
 478                 .name           = "DUAL_GID2SID",
 479                 .struct_cmd     = WINBINDD_DUAL_GID2SID,
 480                 .struct_fn      = winbindd_dual_gid2sid,
 481         },{
 482                 .name           = "DUAL_REMOVE_MAPPING",
 483                 .struct_cmd     = WINBINDD_DUAL_REMOVE_MAPPING,
 484                 .struct_fn      = winbindd_dual_remove_mapping,
 485         },{
 486                 .name           = "DUAL_SET_HWMS",
 487                 .struct_cmd     = WINBINDD_DUAL_SET_HWM,
 488                 .struct_fn      = winbindd_dual_set_hwm,
 489         },{
 490                 .name           = "NDRCMD",
 491                 .struct_cmd     = WINBINDD_DUAL_NDRCMD,
 492                 .struct_fn      = winbindd_dual_ndrcmd,
 493         },{
 494                 .name           = NULL,
 495         }
 496 };
 497
 498 void init_idmap_child(void)
 499 {
 500         setup_child(NULL, &static_idmap_child,
 501                     idmap_dispatch_table,
 502                     "log.winbindd", "idmap");
 503 }