source/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 const struct winbindd_child_dispatch_table idmap_dispatch_table[];
  42
  43 static struct winbindd_child static_idmap_child;
  44
  45 void init_idmap_child(void)
  46 {
  47         setup_child(&static_idmap_child,
  48                     idmap_dispatch_table,
  49                     "log.winbindd", "idmap");
  50 }
  51
  52 struct winbindd_child *idmap_child(void)
  53 {
  54         return &static_idmap_child;
  55 }
  56
  57 static void winbindd_set_mapping_recv(TALLOC_CTX *mem_ctx, bool success,
  58                                    struct winbindd_response *response,
  59                                    void *c, void *private_data)
  60 {
  61         void (*cont)(void *priv, bool succ) = (void (*)(void *, bool))c;
  62
  63         if (!success) {
  64                 DEBUG(5, ("Could not trigger idmap_set_mapping\n"));
  65                 cont(private_data, False);
  66                 return;
  67         }
  68
  69         if (response->result != WINBINDD_OK) {
  70                 DEBUG(5, ("idmap_set_mapping returned an error\n"));
  71                 cont(private_data, False);
  72                 return;
  73         }
  74
  75         cont(private_data, True);
  76 }
  77
  78 void winbindd_set_mapping_async(TALLOC_CTX *mem_ctx, const struct id_map *map,
  79                              void (*cont)(void *private_data, bool success),
  80                              void *private_data)
  81 {
  82         struct winbindd_request request;
  83         ZERO_STRUCT(request);
  84         request.cmd = WINBINDD_DUAL_SET_MAPPING;
  85         request.data.dual_idmapset.id = map->xid.id;
  86         request.data.dual_idmapset.type = map->xid.type;
  87         sid_to_fstring(request.data.dual_idmapset.sid, map->sid);
  88
  89         do_async(mem_ctx, idmap_child(), &request, winbindd_set_mapping_recv,
  90                  (void *)cont, private_data);
  91 }
  92
  93 enum winbindd_result winbindd_dual_set_mapping(struct winbindd_domain *domain,
  94                                             struct winbindd_cli_state *state)
  95 {
  96         struct id_map map;
  97         DOM_SID sid;
  98         NTSTATUS result;
  99
 100         DEBUG(3, ("[%5lu]: dual_idmapset\n", (unsigned long)state->pid));
 101
 102         if (!string_to_sid(&sid, state->request.data.dual_idmapset.sid))
 103                 return WINBINDD_ERROR;
 104
 105         map.sid = &sid;
 106         map.xid.id = state->request.data.dual_idmapset.id;
 107         map.xid.type = state->request.data.dual_idmapset.type;
 108         map.status = ID_MAPPED;
 109
 110         result = idmap_set_mapping(&map);
 111         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 112 }
 113
 114 static void winbindd_set_hwm_recv(TALLOC_CTX *mem_ctx, bool success,
 115                                    struct winbindd_response *response,
 116                                    void *c, void *private_data)
 117 {
 118         void (*cont)(void *priv, bool succ) = (void (*)(void *, bool))c;
 119
 120         if (!success) {
 121                 DEBUG(5, ("Could not trigger idmap_set_hwm\n"));
 122                 cont(private_data, False);
 123                 return;
 124         }
 125
 126         if (response->result != WINBINDD_OK) {
 127                 DEBUG(5, ("idmap_set_hwm returned an error\n"));
 128                 cont(private_data, False);
 129                 return;
 130         }
 131
 132         cont(private_data, True);
 133 }
 134
 135 void winbindd_set_hwm_async(TALLOC_CTX *mem_ctx, const struct unixid *xid,
 136                              void (*cont)(void *private_data, bool success),
 137                              void *private_data)
 138 {
 139         struct winbindd_request request;
 140         ZERO_STRUCT(request);
 141         request.cmd = WINBINDD_DUAL_SET_HWM;
 142         request.data.dual_idmapset.id = xid->id;
 143         request.data.dual_idmapset.type = xid->type;
 144
 145         do_async(mem_ctx, idmap_child(), &request, winbindd_set_hwm_recv,
 146                  (void *)cont, private_data);
 147 }
 148
 149 enum winbindd_result winbindd_dual_set_hwm(struct winbindd_domain *domain,
 150                                             struct winbindd_cli_state *state)
 151 {
 152         struct unixid xid;
 153         NTSTATUS result;
 154
 155         DEBUG(3, ("[%5lu]: dual_set_hwm\n", (unsigned long)state->pid));
 156
 157         xid.id = state->request.data.dual_idmapset.id;
 158         xid.type = state->request.data.dual_idmapset.type;
 159
 160         switch (xid.type) {
 161         case ID_TYPE_UID:
 162                 result = idmap_set_uid_hwm(&xid);
 163                 break;
 164         case ID_TYPE_GID:
 165                 result = idmap_set_gid_hwm(&xid);
 166                 break;
 167         default:
 168                 return WINBINDD_ERROR;
 169         }
 170         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 171 }
 172
 173 static void winbindd_sids2xids_recv(TALLOC_CTX *mem_ctx, bool success,
 174                                struct winbindd_response *response,
 175                                void *c, void *private_data)
 176 {
 177         void (*cont)(void *priv, bool succ, void *, int) =
 178                 (void (*)(void *, bool, void *, int))c;
 179
 180         if (!success) {
 181                 DEBUG(5, ("Could not trigger sids2xids\n"));
 182                 cont(private_data, False, NULL, 0);
 183                 return;
 184         }
 185
 186         if (response->result != WINBINDD_OK) {
 187                 DEBUG(5, ("sids2xids returned an error\n"));
 188                 cont(private_data, False, NULL, 0);
 189                 return;
 190         }
 191
 192         cont(private_data, True, response->extra_data.data, response->length - sizeof(response));
 193 }
 194
 195 void winbindd_sids2xids_async(TALLOC_CTX *mem_ctx, void *sids, int size,
 196                          void (*cont)(void *private_data, bool success, void *data, int len),
 197                          void *private_data)
 198 {
 199         struct winbindd_request request;
 200         ZERO_STRUCT(request);
 201         request.cmd = WINBINDD_DUAL_SIDS2XIDS;
 202         request.extra_data.data = (char *)sids;
 203         request.extra_len = size;
 204         do_async(mem_ctx, idmap_child(), &request, winbindd_sids2xids_recv,
 205                  (void *)cont, private_data);
 206 }
 207
 208 enum winbindd_result winbindd_dual_sids2xids(struct winbindd_domain *domain,
 209                                            struct winbindd_cli_state *state)
 210 {
 211         DOM_SID *sids;
 212         struct unixid *xids;
 213         struct id_map **ids;
 214         NTSTATUS result;
 215         int num, i;
 216
 217         DEBUG(3, ("[%5lu]: sids to unix ids\n", (unsigned long)state->pid));
 218
 219         if (state->request.extra_len == 0) {
 220                 DEBUG(0, ("Invalid buffer size!\n"));
 221                 return WINBINDD_ERROR;
 222         }
 223
 224         sids = (DOM_SID *)state->request.extra_data.data;
 225         num = state->request.extra_len / sizeof(DOM_SID);
 226
 227         ids = TALLOC_ZERO_ARRAY(state->mem_ctx, struct id_map *, num + 1);
 228         if ( ! ids) {
 229                 DEBUG(0, ("Out of memory!\n"));
 230                 return WINBINDD_ERROR;
 231         }
 232         for (i = 0; i < num; i++) {
 233                 ids[i] = TALLOC_P(ids, struct id_map);
 234                 if ( ! ids[i]) {
 235                         DEBUG(0, ("Out of memory!\n"));
 236                         talloc_free(ids);
 237                         return WINBINDD_ERROR;
 238                 }
 239                 ids[i]->sid = &sids[i];
 240         }
 241
 242         result = idmap_sids_to_unixids(ids);
 243
 244         if (NT_STATUS_IS_OK(result)) {
 245
 246                 xids = SMB_MALLOC_ARRAY(struct unixid, num);
 247                 if ( ! xids) {
 248                         DEBUG(0, ("Out of memory!\n"));
 249                         talloc_free(ids);
 250                         return WINBINDD_ERROR;
 251                 }
 252
 253                 for (i = 0; i < num; i++) {
 254                         if (ids[i]->status == ID_MAPPED) {
 255                                 xids[i].type = ids[i]->xid.type;
 256                                 xids[i].id = ids[i]->xid.id;
 257                         } else {
 258                                 xids[i].type = -1;
 259                         }
 260                 }
 261
 262                 state->response.length = sizeof(state->response) + (sizeof(struct unixid) * num);
 263                 state->response.extra_data.data = xids;
 264
 265         } else {
 266                 DEBUG (2, ("idmap_sids_to_unixids returned an error: 0x%08x\n", NT_STATUS_V(result)));
 267                 talloc_free(ids);
 268                 return WINBINDD_ERROR;
 269         }
 270
 271         talloc_free(ids);
 272         return WINBINDD_OK;
 273 }
 274
 275 static void winbindd_sid2uid_recv(TALLOC_CTX *mem_ctx, bool success,
 276                                struct winbindd_response *response,
 277                                void *c, void *private_data)
 278 {
 279         void (*cont)(void *priv, bool succ, uid_t uid) =
 280                 (void (*)(void *, bool, uid_t))c;
 281
 282         if (!success) {
 283                 DEBUG(5, ("Could not trigger sid2uid\n"));
 284                 cont(private_data, False, 0);
 285                 return;
 286         }
 287
 288         if (response->result != WINBINDD_OK) {
 289                 DEBUG(5, ("sid2uid returned an error\n"));
 290                 cont(private_data, False, 0);
 291                 return;
 292         }
 293
 294         cont(private_data, True, response->data.uid);
 295 }
 296
 297 void winbindd_sid2uid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 298                          void (*cont)(void *private_data, bool success, uid_t uid),
 299                          void *private_data)
 300 {
 301         struct winbindd_request request;
 302         ZERO_STRUCT(request);
 303         request.cmd = WINBINDD_DUAL_SID2UID;
 304         sid_to_fstring(request.data.dual_sid2id.sid, sid);
 305         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2uid_recv,
 306                  (void *)cont, private_data);
 307 }
 308
 309 enum winbindd_result winbindd_dual_sid2uid(struct winbindd_domain *domain,
 310                                            struct winbindd_cli_state *state)
 311 {
 312         DOM_SID sid;
 313         NTSTATUS result;
 314
 315         DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
 316                   state->request.data.dual_sid2id.sid));
 317
 318         if (!string_to_sid(&sid, state->request.data.dual_sid2id.sid)) {
 319                 DEBUG(1, ("Could not get convert sid %s from string\n",
 320                           state->request.data.dual_sid2id.sid));
 321                 return WINBINDD_ERROR;
 322         }
 323
 324         /* Find uid for this sid and return it, possibly ask the slow remote idmap */
 325
 326         result = idmap_sid_to_uid(&sid, &(state->response.data.uid));
 327
 328         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 329 }
 330
 331 static void winbindd_sid2gid_recv(TALLOC_CTX *mem_ctx, bool success,
 332                                struct winbindd_response *response,
 333                                void *c, void *private_data)
 334 {
 335         void (*cont)(void *priv, bool succ, gid_t gid) =
 336                 (void (*)(void *, bool, gid_t))c;
 337
 338         if (!success) {
 339                 DEBUG(5, ("Could not trigger sid2gid\n"));
 340                 cont(private_data, False, 0);
 341                 return;
 342         }
 343
 344         if (response->result != WINBINDD_OK) {
 345                 DEBUG(5, ("sid2gid returned an error\n"));
 346                 cont(private_data, False, 0);
 347                 return;
 348         }
 349
 350         cont(private_data, True, response->data.gid);
 351 }
 352
 353 void winbindd_sid2gid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 354                          void (*cont)(void *private_data, bool success, gid_t gid),
 355                          void *private_data)
 356 {
 357         struct winbindd_request request;
 358         ZERO_STRUCT(request);
 359         request.cmd = WINBINDD_DUAL_SID2GID;
 360         sid_to_fstring(request.data.dual_sid2id.sid, sid);
 361
 362         DEBUG(7,("winbindd_sid2gid_async: Resolving %s to a gid\n",
 363                 request.data.dual_sid2id.sid));
 364
 365         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2gid_recv,
 366                  (void *)cont, private_data);
 367 }
 368
 369 enum winbindd_result winbindd_dual_sid2gid(struct winbindd_domain *domain,
 370                                            struct winbindd_cli_state *state)
 371 {
 372         DOM_SID sid;
 373         NTSTATUS result;
 374
 375         DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
 376                   state->request.data.dual_sid2id.sid));
 377
 378         if (!string_to_sid(&sid, state->request.data.dual_sid2id.sid)) {
 379                 DEBUG(1, ("Could not get convert sid %s from string\n",
 380                           state->request.data.dual_sid2id.sid));
 381                 return WINBINDD_ERROR;
 382         }
 383
 384         /* Find gid for this sid and return it, possibly ask the slow remote idmap */
 385
 386         result = idmap_sid_to_gid(&sid, &state->response.data.gid);
 387
 388         DEBUG(10, ("winbindd_dual_sid2gid: 0x%08x - %s - %u\n",
 389                    NT_STATUS_V(result), sid_string_dbg(&sid),
 390                    state->response.data.gid));
 391
 392         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 393 }
 394
 395 /* The following uid2sid/gid2sid functions has been contributed by
 396  * Keith Reynolds <Keith.Reynolds@centrify.com> */
 397
 398 static void winbindd_uid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 399                                   struct winbindd_response *response,
 400                                   void *c, void *private_data)
 401 {
 402         void (*cont)(void *priv, bool succ, const char *sid) =
 403                 (void (*)(void *, bool, const char *))c;
 404
 405         if (!success) {
 406                 DEBUG(5, ("Could not trigger uid2sid\n"));
 407                 cont(private_data, False, NULL);
 408                 return;
 409         }
 410
 411         if (response->result != WINBINDD_OK) {
 412                 DEBUG(5, ("uid2sid returned an error\n"));
 413                 cont(private_data, False, NULL);
 414                 return;
 415         }
 416
 417         cont(private_data, True, response->data.sid.sid);
 418 }
 419
 420 void winbindd_uid2sid_async(TALLOC_CTX *mem_ctx, uid_t uid,
 421                             void (*cont)(void *private_data, bool success, const char *sid),
 422                             void *private_data)
 423 {
 424         struct winbindd_request request;
 425
 426         ZERO_STRUCT(request);
 427         request.cmd = WINBINDD_DUAL_UID2SID;
 428         request.data.uid = uid;
 429         do_async(mem_ctx, idmap_child(), &request, winbindd_uid2sid_recv,
 430                  (void *)cont, private_data);
 431 }
 432
 433 enum winbindd_result winbindd_dual_uid2sid(struct winbindd_domain *domain,
 434                                            struct winbindd_cli_state *state)
 435 {
 436         DOM_SID sid;
 437         NTSTATUS result;
 438
 439         DEBUG(3,("[%5lu]: uid to sid %lu\n",
 440                  (unsigned long)state->pid,
 441                  (unsigned long) state->request.data.uid));
 442
 443         /* Find sid for this uid and return it, possibly ask the slow remote idmap */
 444         result = idmap_uid_to_sid(&sid, state->request.data.uid);
 445
 446         if (NT_STATUS_IS_OK(result)) {
 447                 sid_to_fstring(state->response.data.sid.sid, &sid);
 448                 state->response.data.sid.type = SID_NAME_USER;
 449                 return WINBINDD_OK;
 450         }
 451
 452         return WINBINDD_ERROR;
 453 }
 454
 455 static void winbindd_gid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 456                                   struct winbindd_response *response,
 457                                   void *c, void *private_data)
 458 {
 459         void (*cont)(void *priv, bool succ, const char *sid) =
 460                 (void (*)(void *, bool, const char *))c;
 461
 462         if (!success) {
 463                 DEBUG(5, ("Could not trigger gid2sid\n"));
 464                 cont(private_data, False, NULL);
 465                 return;
 466         }
 467
 468         if (response->result != WINBINDD_OK) {
 469                 DEBUG(5, ("gid2sid returned an error\n"));
 470                 cont(private_data, False, NULL);
 471                 return;
 472         }
 473
 474         cont(private_data, True, response->data.sid.sid);
 475 }
 476
 477 void winbindd_gid2sid_async(TALLOC_CTX *mem_ctx, gid_t gid,
 478                             void (*cont)(void *private_data, bool success, const char *sid),
 479                             void *private_data)
 480 {
 481         struct winbindd_request request;
 482
 483         ZERO_STRUCT(request);
 484         request.cmd = WINBINDD_DUAL_GID2SID;
 485         request.data.gid = gid;
 486         do_async(mem_ctx, idmap_child(), &request, winbindd_gid2sid_recv,
 487                  (void *)cont, private_data);
 488 }
 489
 490 enum winbindd_result winbindd_dual_gid2sid(struct winbindd_domain *domain,
 491                                            struct winbindd_cli_state *state)
 492 {
 493         DOM_SID sid;
 494         NTSTATUS result;
 495
 496         DEBUG(3,("[%5lu]: gid %lu to sid\n",
 497                 (unsigned long)state->pid,
 498                 (unsigned long) state->request.data.gid));
 499
 500         /* Find sid for this gid and return it, possibly ask the slow remote idmap */
 501         result = idmap_gid_to_sid(&sid, state->request.data.gid);
 502
 503         if (NT_STATUS_IS_OK(result)) {
 504                 sid_to_fstring(state->response.data.sid.sid, &sid);
 505                 DEBUG(10, ("[%5lu]: retrieved sid: %s\n",
 506                            (unsigned long)state->pid,
 507                            state->response.data.sid.sid));
 508                 state->response.data.sid.type = SID_NAME_DOM_GRP;
 509                 return WINBINDD_OK;
 510         }
 511
 512         return WINBINDD_ERROR;
 513 }
 514
 515 static const struct winbindd_child_dispatch_table idmap_dispatch_table[] = {
 516         {
 517                 .name           = "DUAL_SID2UID",
 518                 .struct_cmd     = WINBINDD_DUAL_SID2UID,
 519                 .struct_fn      = winbindd_dual_sid2uid,
 520         },{
 521                 .name           = "DUAL_SID2GID",
 522                 .struct_cmd     = WINBINDD_DUAL_SID2GID,
 523                 .struct_fn      = winbindd_dual_sid2gid,
 524 #if 0   /* DISABLED until we fix the interface in Samba 3.0.26 --jerry */
 525         },{
 526                 .name           = "DUAL_SIDS2XIDS",
 527                 .struct_cmd     = WINBINDD_DUAL_SIDS2XIDS,
 528                 .struct_fn      = winbindd_dual_sids2xids,
 529 #endif  /* end DISABLED */
 530         },{
 531                 .name           = "DUAL_UID2SID",
 532                 .struct_cmd     = WINBINDD_DUAL_UID2SID,
 533                 .struct_fn      = winbindd_dual_uid2sid,
 534         },{
 535                 .name           = "DUAL_GID2SID",
 536                 .struct_cmd     = WINBINDD_DUAL_GID2SID,
 537                 .struct_fn      = winbindd_dual_gid2sid,
 538         },{
 539                 .name           = "DUAL_SET_MAPPING",
 540                 .struct_cmd     = WINBINDD_DUAL_SET_MAPPING,
 541                 .struct_fn      = winbindd_dual_set_mapping,
 542         },{
 543                 .name           = "DUAL_SET_HWMS",
 544                 .struct_cmd     = WINBINDD_DUAL_SET_HWM,
 545                 .struct_fn      = winbindd_dual_set_hwm,
 546         },{
 547                 .name           = "ALLOCATE_UID",
 548                 .struct_cmd     = WINBINDD_ALLOCATE_UID,
 549                 .struct_fn      = winbindd_dual_allocate_uid,
 550         },{
 551                 .name           = "ALLOCATE_GID",
 552                 .struct_cmd     = WINBINDD_ALLOCATE_GID,
 553                 .struct_fn      = winbindd_dual_allocate_gid,
 554         },{
 555                 .name           = NULL,
 556         }
 557 };