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_sid2uid_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, uid_t uid) =
 178                 (void (*)(void *, bool, uid_t))c;
 179
 180         if (!success) {
 181                 DEBUG(5, ("Could not trigger sid2uid\n"));
 182                 cont(private_data, False, 0);
 183                 return;
 184         }
 185
 186         if (response->result != WINBINDD_OK) {
 187                 DEBUG(5, ("sid2uid returned an error\n"));
 188                 cont(private_data, False, 0);
 189                 return;
 190         }
 191
 192         cont(private_data, True, response->data.uid);
 193 }
 194
 195 void winbindd_sid2uid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 196                          void (*cont)(void *private_data, bool success, uid_t uid),
 197                          void *private_data)
 198 {
 199         struct winbindd_request request;
 200         struct winbindd_domain *domain;
 201
 202         ZERO_STRUCT(request);
 203         request.cmd = WINBINDD_DUAL_SID2UID;
 204
 205         domain = find_domain_from_sid(sid);
 206
 207         if (domain != NULL) {
 208                 DEBUG(10, ("winbindd_sid2uid_async found domain %s, "
 209                            "have_idmap_config = %d\n", domain->name,
 210                            (int)domain->have_idmap_config));
 211
 212         }
 213         else {
 214                 DEBUG(10, ("winbindd_sid2uid_async did not find a domain for "
 215                            "%s\n", sid_string_dbg(sid)));
 216         }
 217
 218         if ((domain != NULL) && (domain->have_idmap_config)) {
 219                 fstrcpy(request.domain_name, domain->name);
 220         }
 221
 222         sid_to_fstring(request.data.dual_sid2id.sid, sid);
 223         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2uid_recv,
 224                  (void *)cont, private_data);
 225 }
 226
 227 enum winbindd_result winbindd_dual_sid2uid(struct winbindd_domain *domain,
 228                                            struct winbindd_cli_state *state)
 229 {
 230         DOM_SID sid;
 231         NTSTATUS result;
 232
 233         DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
 234                   state->request.data.dual_sid2id.sid));
 235
 236         if (!string_to_sid(&sid, state->request.data.dual_sid2id.sid)) {
 237                 DEBUG(1, ("Could not get convert sid %s from string\n",
 238                           state->request.data.dual_sid2id.sid));
 239                 return WINBINDD_ERROR;
 240         }
 241
 242         result = idmap_sid_to_uid(state->request.domain_name, &sid,
 243                                   &state->response.data.uid);
 244
 245         DEBUG(10, ("winbindd_dual_sid2uid: 0x%08x - %s - %u\n",
 246                    NT_STATUS_V(result), sid_string_dbg(&sid),
 247                    state->response.data.uid));
 248
 249         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 250 }
 251
 252 static void winbindd_sid2gid_recv(TALLOC_CTX *mem_ctx, bool success,
 253                                struct winbindd_response *response,
 254                                void *c, void *private_data)
 255 {
 256         void (*cont)(void *priv, bool succ, gid_t gid) =
 257                 (void (*)(void *, bool, gid_t))c;
 258
 259         if (!success) {
 260                 DEBUG(5, ("Could not trigger sid2gid\n"));
 261                 cont(private_data, False, 0);
 262                 return;
 263         }
 264
 265         if (response->result != WINBINDD_OK) {
 266                 DEBUG(5, ("sid2gid returned an error\n"));
 267                 cont(private_data, False, 0);
 268                 return;
 269         }
 270
 271         cont(private_data, True, response->data.gid);
 272 }
 273
 274 void winbindd_sid2gid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 275                          void (*cont)(void *private_data, bool success, gid_t gid),
 276                          void *private_data)
 277 {
 278         struct winbindd_request request;
 279         struct winbindd_domain *domain;
 280
 281         ZERO_STRUCT(request);
 282         request.cmd = WINBINDD_DUAL_SID2GID;
 283
 284         domain = find_domain_from_sid(sid);
 285         if ((domain != NULL) && (domain->have_idmap_config)) {
 286                 fstrcpy(request.domain_name, domain->name);
 287         }
 288
 289         sid_to_fstring(request.data.dual_sid2id.sid, sid);
 290
 291         DEBUG(7,("winbindd_sid2gid_async: Resolving %s to a gid\n",
 292                 request.data.dual_sid2id.sid));
 293
 294         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2gid_recv,
 295                  (void *)cont, private_data);
 296 }
 297
 298 enum winbindd_result winbindd_dual_sid2gid(struct winbindd_domain *domain,
 299                                            struct winbindd_cli_state *state)
 300 {
 301         DOM_SID sid;
 302         NTSTATUS result;
 303
 304         DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
 305                   state->request.data.dual_sid2id.sid));
 306
 307         if (!string_to_sid(&sid, state->request.data.dual_sid2id.sid)) {
 308                 DEBUG(1, ("Could not get convert sid %s from string\n",
 309                           state->request.data.dual_sid2id.sid));
 310                 return WINBINDD_ERROR;
 311         }
 312
 313         /* Find gid for this sid and return it, possibly ask the slow remote idmap */
 314
 315         result = idmap_sid_to_gid(state->request.domain_name, &sid,
 316                                   &state->response.data.gid);
 317
 318         DEBUG(10, ("winbindd_dual_sid2gid: 0x%08x - %s - %u\n",
 319                    NT_STATUS_V(result), sid_string_dbg(&sid),
 320                    state->response.data.gid));
 321
 322         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 323 }
 324
 325 /* The following uid2sid/gid2sid functions has been contributed by
 326  * Keith Reynolds <Keith.Reynolds@centrify.com> */
 327
 328 static void winbindd_uid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 329                                   struct winbindd_response *response,
 330                                   void *c, void *private_data)
 331 {
 332         void (*cont)(void *priv, bool succ, const char *sid) =
 333                 (void (*)(void *, bool, const char *))c;
 334
 335         if (!success) {
 336                 DEBUG(5, ("Could not trigger uid2sid\n"));
 337                 cont(private_data, False, NULL);
 338                 return;
 339         }
 340
 341         if (response->result != WINBINDD_OK) {
 342                 DEBUG(5, ("uid2sid returned an error\n"));
 343                 cont(private_data, False, NULL);
 344                 return;
 345         }
 346
 347         cont(private_data, True, response->data.sid.sid);
 348 }
 349
 350 void winbindd_uid2sid_async(TALLOC_CTX *mem_ctx, uid_t uid,
 351                             void (*cont)(void *private_data, bool success, const char *sid),
 352                             void *private_data)
 353 {
 354         struct winbindd_domain *domain;
 355         struct winbindd_request request;
 356
 357         ZERO_STRUCT(request);
 358         request.cmd = WINBINDD_DUAL_UID2SID;
 359         request.data.uid = uid;
 360
 361         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 362                 if (domain->have_idmap_config
 363                     && (uid >= domain->id_range_low)
 364                     && (uid <= domain->id_range_high)) {
 365                         fstrcpy(request.domain_name, domain->name);
 366                 }
 367         }
 368
 369         do_async(mem_ctx, idmap_child(), &request, winbindd_uid2sid_recv,
 370                  (void *)cont, private_data);
 371 }
 372
 373 enum winbindd_result winbindd_dual_uid2sid(struct winbindd_domain *domain,
 374                                            struct winbindd_cli_state *state)
 375 {
 376         DOM_SID sid;
 377         NTSTATUS result;
 378
 379         DEBUG(3,("[%5lu]: uid to sid %lu\n",
 380                  (unsigned long)state->pid,
 381                  (unsigned long) state->request.data.uid));
 382
 383         /* Find sid for this uid and return it, possibly ask the slow remote idmap */
 384         result = idmap_uid_to_sid(state->request.domain_name, &sid,
 385                                   state->request.data.uid);
 386
 387         if (NT_STATUS_IS_OK(result)) {
 388                 sid_to_fstring(state->response.data.sid.sid, &sid);
 389                 state->response.data.sid.type = SID_NAME_USER;
 390                 return WINBINDD_OK;
 391         }
 392
 393         return WINBINDD_ERROR;
 394 }
 395
 396 static void winbindd_gid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 397                                   struct winbindd_response *response,
 398                                   void *c, void *private_data)
 399 {
 400         void (*cont)(void *priv, bool succ, const char *sid) =
 401                 (void (*)(void *, bool, const char *))c;
 402
 403         if (!success) {
 404                 DEBUG(5, ("Could not trigger gid2sid\n"));
 405                 cont(private_data, False, NULL);
 406                 return;
 407         }
 408
 409         if (response->result != WINBINDD_OK) {
 410                 DEBUG(5, ("gid2sid returned an error\n"));
 411                 cont(private_data, False, NULL);
 412                 return;
 413         }
 414
 415         cont(private_data, True, response->data.sid.sid);
 416 }
 417
 418 void winbindd_gid2sid_async(TALLOC_CTX *mem_ctx, gid_t gid,
 419                             void (*cont)(void *private_data, bool success, const char *sid),
 420                             void *private_data)
 421 {
 422         struct winbindd_domain *domain;
 423         struct winbindd_request request;
 424
 425         ZERO_STRUCT(request);
 426         request.cmd = WINBINDD_DUAL_GID2SID;
 427         request.data.gid = gid;
 428
 429         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 430                 if (domain->have_idmap_config
 431                     && (gid >= domain->id_range_low)
 432                     && (gid <= domain->id_range_high)) {
 433                         fstrcpy(request.domain_name, domain->name);
 434                 }
 435         }
 436
 437         do_async(mem_ctx, idmap_child(), &request, winbindd_gid2sid_recv,
 438                  (void *)cont, private_data);
 439 }
 440
 441 enum winbindd_result winbindd_dual_gid2sid(struct winbindd_domain *domain,
 442                                            struct winbindd_cli_state *state)
 443 {
 444         DOM_SID sid;
 445         NTSTATUS result;
 446
 447         DEBUG(3,("[%5lu]: gid %lu to sid\n",
 448                 (unsigned long)state->pid,
 449                 (unsigned long) state->request.data.gid));
 450
 451         /* Find sid for this gid and return it, possibly ask the slow remote idmap */
 452         result = idmap_gid_to_sid(state->request.domain_name, &sid,
 453                                   state->request.data.gid);
 454
 455         if (NT_STATUS_IS_OK(result)) {
 456                 sid_to_fstring(state->response.data.sid.sid, &sid);
 457                 DEBUG(10, ("[%5lu]: retrieved sid: %s\n",
 458                            (unsigned long)state->pid,
 459                            state->response.data.sid.sid));
 460                 state->response.data.sid.type = SID_NAME_DOM_GRP;
 461                 return WINBINDD_OK;
 462         }
 463
 464         return WINBINDD_ERROR;
 465 }
 466
 467 static const struct winbindd_child_dispatch_table idmap_dispatch_table[] = {
 468         {
 469                 .name           = "DUAL_SID2UID",
 470                 .struct_cmd     = WINBINDD_DUAL_SID2UID,
 471                 .struct_fn      = winbindd_dual_sid2uid,
 472         },{
 473                 .name           = "DUAL_SID2GID",
 474                 .struct_cmd     = WINBINDD_DUAL_SID2GID,
 475                 .struct_fn      = winbindd_dual_sid2gid,
 476         },{
 477                 .name           = "DUAL_UID2SID",
 478                 .struct_cmd     = WINBINDD_DUAL_UID2SID,
 479                 .struct_fn      = winbindd_dual_uid2sid,
 480         },{
 481                 .name           = "DUAL_GID2SID",
 482                 .struct_cmd     = WINBINDD_DUAL_GID2SID,
 483                 .struct_fn      = winbindd_dual_gid2sid,
 484         },{
 485                 .name           = "DUAL_SET_MAPPING",
 486                 .struct_cmd     = WINBINDD_DUAL_SET_MAPPING,
 487                 .struct_fn      = winbindd_dual_set_mapping,
 488         },{
 489                 .name           = "DUAL_SET_HWMS",
 490                 .struct_cmd     = WINBINDD_DUAL_SET_HWM,
 491                 .struct_fn      = winbindd_dual_set_hwm,
 492         },{
 493                 .name           = "ALLOCATE_UID",
 494                 .struct_cmd     = WINBINDD_ALLOCATE_UID,
 495                 .struct_fn      = winbindd_dual_allocate_uid,
 496         },{
 497                 .name           = "ALLOCATE_GID",
 498                 .struct_cmd     = WINBINDD_ALLOCATE_GID,
 499                 .struct_fn      = winbindd_dual_allocate_gid,
 500         },{
 501                 .name           = NULL,
 502         }
 503 };