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_sid2uid_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, uid_t uid) =
  53                 (void (*)(void *, bool, uid_t))c;
  54
  55         if (!success) {
  56                 DEBUG(5, ("Could not trigger sid2uid\n"));
  57                 cont(private_data, False, 0);
  58                 return;
  59         }
  60
  61         if (response->result != WINBINDD_OK) {
  62                 DEBUG(5, ("sid2uid returned an error\n"));
  63                 cont(private_data, False, 0);
  64                 return;
  65         }
  66
  67         cont(private_data, True, response->data.uid);
  68 }
  69
  70 void winbindd_sid2uid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
  71                          void (*cont)(void *private_data, bool success, uid_t uid),
  72                          void *private_data)
  73 {
  74         struct winbindd_request request;
  75         struct winbindd_domain *domain;
  76
  77         ZERO_STRUCT(request);
  78         request.cmd = WINBINDD_DUAL_SID2UID;
  79
  80         domain = find_domain_from_sid(sid);
  81
  82         if (domain != NULL) {
  83                 DEBUG(10, ("winbindd_sid2uid_async found domain %s, "
  84                            "have_idmap_config = %d\n", domain->name,
  85                            (int)domain->have_idmap_config));
  86
  87         }
  88         else {
  89                 DEBUG(10, ("winbindd_sid2uid_async did not find a domain for "
  90                            "%s\n", sid_string_dbg(sid)));
  91         }
  92
  93         if ((domain != NULL) && (domain->have_idmap_config)) {
  94                 fstrcpy(request.domain_name, domain->name);
  95         }
  96
  97         sid_to_fstring(request.data.dual_sid2id.sid, sid);
  98         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2uid_recv,
  99                  (void *)cont, private_data);
 100 }
 101
 102 enum winbindd_result winbindd_dual_sid2uid(struct winbindd_domain *domain,
 103                                            struct winbindd_cli_state *state)
 104 {
 105         DOM_SID sid;
 106         NTSTATUS result;
 107
 108         DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
 109                   state->request->data.dual_sid2id.sid));
 110
 111         if (!string_to_sid(&sid, state->request->data.dual_sid2id.sid)) {
 112                 DEBUG(1, ("Could not get convert sid %s from string\n",
 113                           state->request->data.dual_sid2id.sid));
 114                 return WINBINDD_ERROR;
 115         }
 116
 117         result = idmap_sid_to_uid(state->request->domain_name, &sid,
 118                                   &state->response->data.uid);
 119
 120         DEBUG(10, ("winbindd_dual_sid2uid: 0x%08x - %s - %u\n",
 121                    NT_STATUS_V(result), sid_string_dbg(&sid),
 122                    (unsigned int)state->response->data.uid));
 123
 124         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 125 }
 126
 127 static void winbindd_sid2gid_recv(TALLOC_CTX *mem_ctx, bool success,
 128                                struct winbindd_response *response,
 129                                void *c, void *private_data)
 130 {
 131         void (*cont)(void *priv, bool succ, gid_t gid) =
 132                 (void (*)(void *, bool, gid_t))c;
 133
 134         if (!success) {
 135                 DEBUG(5, ("Could not trigger sid2gid\n"));
 136                 cont(private_data, False, 0);
 137                 return;
 138         }
 139
 140         if (response->result != WINBINDD_OK) {
 141                 DEBUG(5, ("sid2gid returned an error\n"));
 142                 cont(private_data, False, 0);
 143                 return;
 144         }
 145
 146         cont(private_data, True, response->data.gid);
 147 }
 148
 149 void winbindd_sid2gid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 150                          void (*cont)(void *private_data, bool success, gid_t gid),
 151                          void *private_data)
 152 {
 153         struct winbindd_request request;
 154         struct winbindd_domain *domain;
 155
 156         ZERO_STRUCT(request);
 157         request.cmd = WINBINDD_DUAL_SID2GID;
 158
 159         domain = find_domain_from_sid(sid);
 160         if ((domain != NULL) && (domain->have_idmap_config)) {
 161                 fstrcpy(request.domain_name, domain->name);
 162         }
 163
 164         sid_to_fstring(request.data.dual_sid2id.sid, sid);
 165
 166         DEBUG(7,("winbindd_sid2gid_async: Resolving %s to a gid\n",
 167                 request.data.dual_sid2id.sid));
 168
 169         do_async(mem_ctx, idmap_child(), &request, winbindd_sid2gid_recv,
 170                  (void *)cont, private_data);
 171 }
 172
 173 enum winbindd_result winbindd_dual_sid2gid(struct winbindd_domain *domain,
 174                                            struct winbindd_cli_state *state)
 175 {
 176         DOM_SID sid;
 177         NTSTATUS result;
 178
 179         DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
 180                   state->request->data.dual_sid2id.sid));
 181
 182         if (!string_to_sid(&sid, state->request->data.dual_sid2id.sid)) {
 183                 DEBUG(1, ("Could not get convert sid %s from string\n",
 184                           state->request->data.dual_sid2id.sid));
 185                 return WINBINDD_ERROR;
 186         }
 187
 188         /* Find gid for this sid and return it, possibly ask the slow remote idmap */
 189
 190         result = idmap_sid_to_gid(state->request->domain_name, &sid,
 191                                   &state->response->data.gid);
 192
 193         DEBUG(10, ("winbindd_dual_sid2gid: 0x%08x - %s - %u\n",
 194                    NT_STATUS_V(result), sid_string_dbg(&sid),
 195                    (unsigned int)state->response->data.gid));
 196
 197         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 198 }
 199
 200 /* The following uid2sid/gid2sid functions has been contributed by
 201  * Keith Reynolds <Keith.Reynolds@centrify.com> */
 202
 203 static void winbindd_uid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 204                                   struct winbindd_response *response,
 205                                   void *c, void *private_data)
 206 {
 207         void (*cont)(void *priv, bool succ, const char *sid) =
 208                 (void (*)(void *, bool, const char *))c;
 209
 210         if (!success) {
 211                 DEBUG(5, ("Could not trigger uid2sid\n"));
 212                 cont(private_data, False, NULL);
 213                 return;
 214         }
 215
 216         if (response->result != WINBINDD_OK) {
 217                 DEBUG(5, ("uid2sid returned an error\n"));
 218                 cont(private_data, False, NULL);
 219                 return;
 220         }
 221
 222         cont(private_data, True, response->data.sid.sid);
 223 }
 224
 225 void winbindd_uid2sid_async(TALLOC_CTX *mem_ctx, uid_t uid,
 226                             void (*cont)(void *private_data, bool success, const char *sid),
 227                             void *private_data)
 228 {
 229         struct winbindd_domain *domain;
 230         struct winbindd_request request;
 231
 232         ZERO_STRUCT(request);
 233         request.cmd = WINBINDD_DUAL_UID2SID;
 234         request.data.uid = uid;
 235
 236         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 237                 if (domain->have_idmap_config
 238                     && (uid >= domain->id_range_low)
 239                     && (uid <= domain->id_range_high)) {
 240                         fstrcpy(request.domain_name, domain->name);
 241                 }
 242         }
 243
 244         do_async(mem_ctx, idmap_child(), &request, winbindd_uid2sid_recv,
 245                  (void *)cont, private_data);
 246 }
 247
 248 enum winbindd_result winbindd_dual_uid2sid(struct winbindd_domain *domain,
 249                                            struct winbindd_cli_state *state)
 250 {
 251         DOM_SID sid;
 252         NTSTATUS result;
 253
 254         DEBUG(3,("[%5lu]: uid to sid %lu\n",
 255                  (unsigned long)state->pid,
 256                  (unsigned long) state->request->data.uid));
 257
 258         /* Find sid for this uid and return it, possibly ask the slow remote idmap */
 259         result = idmap_uid_to_sid(state->request->domain_name, &sid,
 260                                   state->request->data.uid);
 261
 262         if (NT_STATUS_IS_OK(result)) {
 263                 sid_to_fstring(state->response->data.sid.sid, &sid);
 264                 state->response->data.sid.type = SID_NAME_USER;
 265                 return WINBINDD_OK;
 266         }
 267
 268         return WINBINDD_ERROR;
 269 }
 270
 271 static void winbindd_gid2sid_recv(TALLOC_CTX *mem_ctx, bool success,
 272                                   struct winbindd_response *response,
 273                                   void *c, void *private_data)
 274 {
 275         void (*cont)(void *priv, bool succ, const char *sid) =
 276                 (void (*)(void *, bool, const char *))c;
 277
 278         if (!success) {
 279                 DEBUG(5, ("Could not trigger gid2sid\n"));
 280                 cont(private_data, False, NULL);
 281                 return;
 282         }
 283
 284         if (response->result != WINBINDD_OK) {
 285                 DEBUG(5, ("gid2sid returned an error\n"));
 286                 cont(private_data, False, NULL);
 287                 return;
 288         }
 289
 290         cont(private_data, True, response->data.sid.sid);
 291 }
 292
 293 void winbindd_gid2sid_async(TALLOC_CTX *mem_ctx, gid_t gid,
 294                             void (*cont)(void *private_data, bool success, const char *sid),
 295                             void *private_data)
 296 {
 297         struct winbindd_domain *domain;
 298         struct winbindd_request request;
 299
 300         ZERO_STRUCT(request);
 301         request.cmd = WINBINDD_DUAL_GID2SID;
 302         request.data.gid = gid;
 303
 304         for (domain = domain_list(); domain != NULL; domain = domain->next) {
 305                 if (domain->have_idmap_config
 306                     && (gid >= domain->id_range_low)
 307                     && (gid <= domain->id_range_high)) {
 308                         fstrcpy(request.domain_name, domain->name);
 309                 }
 310         }
 311
 312         do_async(mem_ctx, idmap_child(), &request, winbindd_gid2sid_recv,
 313                  (void *)cont, private_data);
 314 }
 315
 316 enum winbindd_result winbindd_dual_gid2sid(struct winbindd_domain *domain,
 317                                            struct winbindd_cli_state *state)
 318 {
 319         DOM_SID sid;
 320         NTSTATUS result;
 321
 322         DEBUG(3,("[%5lu]: gid %lu to sid\n",
 323                 (unsigned long)state->pid,
 324                 (unsigned long) state->request->data.gid));
 325
 326         /* Find sid for this gid and return it, possibly ask the slow remote idmap */
 327         result = idmap_gid_to_sid(state->request->domain_name, &sid,
 328                                   state->request->data.gid);
 329
 330         if (NT_STATUS_IS_OK(result)) {
 331                 sid_to_fstring(state->response->data.sid.sid, &sid);
 332                 DEBUG(10, ("[%5lu]: retrieved sid: %s\n",
 333                            (unsigned long)state->pid,
 334                            state->response->data.sid.sid));
 335                 state->response->data.sid.type = SID_NAME_DOM_GRP;
 336                 return WINBINDD_OK;
 337         }
 338
 339         return WINBINDD_ERROR;
 340 }
 341
 342 static const struct winbindd_child_dispatch_table idmap_dispatch_table[] = {
 343         {
 344                 .name           = "PING",
 345                 .struct_cmd     = WINBINDD_PING,
 346                 .struct_fn      = winbindd_dual_ping,
 347         },{
 348                 .name           = "DUAL_SID2UID",
 349                 .struct_cmd     = WINBINDD_DUAL_SID2UID,
 350                 .struct_fn      = winbindd_dual_sid2uid,
 351         },{
 352                 .name           = "DUAL_SID2GID",
 353                 .struct_cmd     = WINBINDD_DUAL_SID2GID,
 354                 .struct_fn      = winbindd_dual_sid2gid,
 355         },{
 356                 .name           = "DUAL_UID2SID",
 357                 .struct_cmd     = WINBINDD_DUAL_UID2SID,
 358                 .struct_fn      = winbindd_dual_uid2sid,
 359         },{
 360                 .name           = "DUAL_GID2SID",
 361                 .struct_cmd     = WINBINDD_DUAL_GID2SID,
 362                 .struct_fn      = winbindd_dual_gid2sid,
 363         },{
 364                 .name           = "NDRCMD",
 365                 .struct_cmd     = WINBINDD_DUAL_NDRCMD,
 366                 .struct_fn      = winbindd_dual_ndrcmd,
 367         },{
 368                 .name           = NULL,
 369         }
 370 };
 371
 372 void init_idmap_child(void)
 373 {
 374         setup_child(NULL, &static_idmap_child,
 375                     idmap_dispatch_table,
 376                     "log.winbindd", "idmap");
 377 }