source3/winbindd/wb_group_members.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async lookupgroupmembers
   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 "winbindd.h"
  22 #include "librpc/gen_ndr/cli_wbint.h"
  23
  24 /*
  25  * We have 3 sets of routines here:
  26  *
  27  * wb_lookupgroupmem is the low-level one-group routine
  28  *
  29  * wb_groups_members walks a list of groups
  30  *
  31  * wb_group_members finally is the high-level routine expanding groups
  32  * recursively
  33  */
  34
  35 /*
  36  * TODO: fill_grent_mem_domusers must be re-added
  37  */
  38
  39 /*
  40  * Look up members of a single group. Essentially a wrapper around the
  41  * lookup_groupmem winbindd_methods routine.
  42  */
  43
  44 struct wb_lookupgroupmem_state {
  45         struct dom_sid sid;
  46         struct wbint_Principals members;
  47 };
  48
  49 static void wb_lookupgroupmem_done(struct tevent_req *subreq);
  50
  51 static struct tevent_req *wb_lookupgroupmem_send(TALLOC_CTX *mem_ctx,
  52                                                  struct tevent_context *ev,
  53                                                  const struct dom_sid *group_sid,
  54                                                  enum lsa_SidType type)
  55 {
  56         struct tevent_req *req, *subreq;
  57         struct wb_lookupgroupmem_state *state;
  58         struct winbindd_domain *domain;
  59
  60         req = tevent_req_create(mem_ctx, &state,
  61                                 struct wb_lookupgroupmem_state);
  62         if (req == NULL) {
  63                 return NULL;
  64         }
  65         sid_copy(&state->sid, group_sid);
  66
  67         domain = find_domain_from_sid_noinit(group_sid);
  68         if (domain == NULL) {
  69                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
  70                 return tevent_req_post(req, ev);
  71         }
  72
  73         subreq = rpccli_wbint_LookupGroupMembers_send(
  74                 state, ev, domain->child.rpccli, &state->sid, type,
  75                 &state->members);
  76         if (tevent_req_nomem(subreq, req)) {
  77                 return tevent_req_post(req, ev);
  78         }
  79         tevent_req_set_callback(subreq, wb_lookupgroupmem_done, req);
  80         return req;
  81 }
  82
  83 static void wb_lookupgroupmem_done(struct tevent_req *subreq)
  84 {
  85         struct tevent_req *req = tevent_req_callback_data(
  86                 subreq, struct tevent_req);
  87         struct wb_lookupgroupmem_state *state = tevent_req_data(
  88                 req, struct wb_lookupgroupmem_state);
  89         NTSTATUS status, result;
  90
  91         status = rpccli_wbint_LookupGroupMembers_recv(subreq, state, &result);
  92         TALLOC_FREE(subreq);
  93         if (!NT_STATUS_IS_OK(status)) {
  94                 tevent_req_nterror(req, status);
  95                 return;
  96         }
  97         if (!NT_STATUS_IS_OK(result)) {
  98                 tevent_req_nterror(req, result);
  99                 return;
 100         }
 101         tevent_req_done(req);
 102 }
 103
 104 static NTSTATUS wb_lookupgroupmem_recv(struct tevent_req *req,
 105                                            TALLOC_CTX *mem_ctx,
 106                                            int *num_members,
 107                                            struct wbint_Principal **members)
 108 {
 109         struct wb_lookupgroupmem_state *state = tevent_req_data(
 110                 req, struct wb_lookupgroupmem_state);
 111         NTSTATUS status;
 112
 113         if (tevent_req_is_nterror(req, &status)) {
 114                 return status;
 115         }
 116
 117         *num_members = state->members.num_principals;
 118         *members = talloc_move(mem_ctx, &state->members.principals);
 119         return NT_STATUS_OK;
 120 }
 121
 122 /*
 123  * Same as wb_lookupgroupmem for a list of groups
 124  */
 125
 126 struct wb_groups_members_state {
 127         struct tevent_context *ev;
 128         struct wbint_Principal *groups;
 129         int num_groups;
 130         int next_group;
 131         struct wbint_Principal *all_members;
 132 };
 133
 134 static NTSTATUS wb_groups_members_next_subreq(
 135         struct wb_groups_members_state *state,
 136         TALLOC_CTX *mem_ctx, struct tevent_req **psubreq);
 137 static void wb_groups_members_done(struct tevent_req *subreq);
 138
 139 static struct tevent_req *wb_groups_members_send(TALLOC_CTX *mem_ctx,
 140                                                  struct tevent_context *ev,
 141                                                  int num_groups,
 142                                                  struct wbint_Principal *groups)
 143 {
 144         struct tevent_req *req, *subreq;
 145         struct wb_groups_members_state *state;
 146         NTSTATUS status;
 147
 148         req = tevent_req_create(mem_ctx, &state,
 149                                 struct wb_groups_members_state);
 150         if (req == NULL) {
 151                 return NULL;
 152         }
 153         state->ev = ev;
 154         state->groups = groups;
 155         state->num_groups = num_groups;
 156         state->next_group = 0;
 157         state->all_members = NULL;
 158
 159         status = wb_groups_members_next_subreq(state, state, &subreq);
 160         if (!NT_STATUS_IS_OK(status)) {
 161                 tevent_req_nterror(req, status);
 162                 return tevent_req_post(req, ev);
 163         }
 164         if (subreq == NULL) {
 165                 tevent_req_done(req);
 166                 return tevent_req_post(req, ev);
 167         }
 168         tevent_req_set_callback(subreq, wb_groups_members_done, req);
 169         return req;
 170 }
 171
 172 static NTSTATUS wb_groups_members_next_subreq(
 173         struct wb_groups_members_state *state,
 174         TALLOC_CTX *mem_ctx, struct tevent_req **psubreq)
 175 {
 176         struct tevent_req *subreq;
 177         struct wbint_Principal *g;
 178
 179         if (state->next_group >= state->num_groups) {
 180                 *psubreq = NULL;
 181                 return NT_STATUS_OK;
 182         }
 183
 184         g = &state->groups[state->next_group];
 185         state->next_group += 1;
 186
 187         subreq = wb_lookupgroupmem_send(mem_ctx, state->ev, &g->sid, g->type);
 188         if (subreq == NULL) {
 189                 return NT_STATUS_NO_MEMORY;
 190         }
 191         *psubreq = subreq;
 192         return NT_STATUS_OK;
 193 }
 194
 195 static void wb_groups_members_done(struct tevent_req *subreq)
 196 {
 197         struct tevent_req *req = tevent_req_callback_data(
 198                 subreq, struct tevent_req);
 199         struct wb_groups_members_state *state = tevent_req_data(
 200                 req, struct wb_groups_members_state);
 201         int i, num_all_members;
 202         int num_members = 0;
 203         struct wbint_Principal *members = NULL;
 204         NTSTATUS status;
 205
 206         status = wb_lookupgroupmem_recv(subreq, state, &num_members,
 207                                             &members);
 208         TALLOC_FREE(subreq);
 209
 210         /*
 211          * In this error handling here we might have to be a bit more generous
 212          * and just continue if an error occured.
 213          */
 214
 215         if (!NT_STATUS_IS_OK(status)) {
 216                 tevent_req_nterror(req, status);
 217                 return;
 218         }
 219
 220         num_all_members = talloc_array_length(state->all_members);
 221
 222         state->all_members = talloc_realloc(
 223                 state, state->all_members, struct wbint_Principal,
 224                 num_all_members + num_members);
 225         if ((num_all_members + num_members != 0)
 226             && tevent_req_nomem(state->all_members, req)) {
 227                 return;
 228         }
 229         for (i=0; i<num_members; i++) {
 230                 struct wbint_Principal *src, *dst;
 231                 src = &members[i];
 232                 dst = &state->all_members[num_all_members + i];
 233                 sid_copy(&dst->sid, &src->sid);
 234                 dst->name = talloc_move(state->all_members, &src->name);
 235                 dst->type = src->type;
 236         }
 237         TALLOC_FREE(members);
 238
 239         status = wb_groups_members_next_subreq(state, state, &subreq);
 240         if (!NT_STATUS_IS_OK(status)) {
 241                 tevent_req_nterror(req, status);
 242                 return;
 243         }
 244         if (subreq == NULL) {
 245                 tevent_req_done(req);
 246                 return;
 247         }
 248         tevent_req_set_callback(subreq, wb_groups_members_done, req);
 249 }
 250
 251 static NTSTATUS wb_groups_members_recv(struct tevent_req *req,
 252                                        TALLOC_CTX *mem_ctx,
 253                                        int *num_members,
 254                                        struct wbint_Principal **members)
 255 {
 256         struct wb_groups_members_state *state = tevent_req_data(
 257                 req, struct wb_groups_members_state);
 258         NTSTATUS status;
 259
 260         if (tevent_req_is_nterror(req, &status)) {
 261                 return status;
 262         }
 263         *num_members = talloc_array_length(state->all_members);
 264         *members = talloc_move(mem_ctx, &state->all_members);
 265         return NT_STATUS_OK;
 266 }
 267
 268
 269 /*
 270  * This is the routine expanding a list of groups up to a certain level. We
 271  * collect the users in a talloc_dict: We have to add them without duplicates,
 272  * and and talloc_dict is an indexed (here indexed by SID) data structure.
 273  */
 274
 275 struct wb_group_members_state {
 276         struct tevent_context *ev;
 277         int depth;
 278         struct talloc_dict *users;
 279         struct wbint_Principal *groups;
 280 };
 281
 282 static NTSTATUS wb_group_members_next_subreq(
 283         struct wb_group_members_state *state,
 284         TALLOC_CTX *mem_ctx, struct tevent_req **psubreq);
 285 static void wb_group_members_done(struct tevent_req *subreq);
 286
 287 struct tevent_req *wb_group_members_send(TALLOC_CTX *mem_ctx,
 288                                          struct tevent_context *ev,
 289                                          const struct dom_sid *sid,
 290                                          enum lsa_SidType type,
 291                                          int max_depth)
 292 {
 293         struct tevent_req *req, *subreq;
 294         struct wb_group_members_state *state;
 295         NTSTATUS status;
 296
 297         req = tevent_req_create(mem_ctx, &state,
 298                                 struct wb_group_members_state);
 299         if (req == NULL) {
 300                 return NULL;
 301         }
 302         state->ev = ev;
 303         state->depth = max_depth;
 304         state->users = talloc_dict_init(state);
 305         if (tevent_req_nomem(state->users, req)) {
 306                 return tevent_req_post(req, ev);
 307         }
 308
 309         state->groups = talloc(state, struct wbint_Principal);
 310         if (tevent_req_nomem(state->groups, req)) {
 311                 return tevent_req_post(req, ev);
 312         }
 313         state->groups->name = NULL;
 314         sid_copy(&state->groups->sid, sid);
 315         state->groups->type = type;
 316
 317         status = wb_group_members_next_subreq(state, state, &subreq);
 318         if (!NT_STATUS_IS_OK(status)) {
 319                 tevent_req_nterror(req, status);
 320                 return tevent_req_post(req, ev);
 321         }
 322         if (subreq == NULL) {
 323                 tevent_req_done(req);
 324                 return tevent_req_post(req, ev);
 325         }
 326         tevent_req_set_callback(subreq, wb_group_members_done, req);
 327         return req;
 328 }
 329
 330 static NTSTATUS wb_group_members_next_subreq(
 331         struct wb_group_members_state *state,
 332         TALLOC_CTX *mem_ctx, struct tevent_req **psubreq)
 333 {
 334         struct tevent_req *subreq;
 335
 336         if ((talloc_array_length(state->groups) == 0)
 337             || (state->depth <= 0)) {
 338                 *psubreq = NULL;
 339                 return NT_STATUS_OK;
 340         }
 341         state->depth -= 1;
 342
 343         subreq = wb_groups_members_send(
 344                 mem_ctx, state->ev, talloc_array_length(state->groups),
 345                 state->groups);
 346         if (subreq == NULL) {
 347                 return NT_STATUS_NO_MEMORY;
 348         }
 349         *psubreq = subreq;
 350         return NT_STATUS_OK;
 351 }
 352
 353 static void wb_group_members_done(struct tevent_req *subreq)
 354 {
 355         struct tevent_req *req = tevent_req_callback_data(
 356                 subreq, struct tevent_req);
 357         struct wb_group_members_state *state = tevent_req_data(
 358                 req, struct wb_group_members_state);
 359         int i, num_groups, new_users, new_groups;
 360         int num_members = 0;
 361         struct wbint_Principal *members = NULL;
 362         NTSTATUS status;
 363
 364         status = wb_groups_members_recv(subreq, state, &num_members, &members);
 365         TALLOC_FREE(subreq);
 366         if (!NT_STATUS_IS_OK(status)) {
 367                 tevent_req_nterror(req, status);
 368                 return;
 369         }
 370
 371         new_users = new_groups = 0;
 372         for (i=0; i<num_members; i++) {
 373                 switch (members[i].type) {
 374                 case SID_NAME_DOM_GRP:
 375                 case SID_NAME_ALIAS:
 376                 case SID_NAME_WKN_GRP:
 377                         new_groups += 1;
 378                         break;
 379                 default:
 380                         /* Ignore everything else */
 381                         break;
 382                 }
 383         }
 384
 385         num_groups = 0;
 386         TALLOC_FREE(state->groups);
 387         state->groups = talloc_array(state, struct wbint_Principal,
 388                                      new_groups);
 389
 390         /*
 391          * Collect the users into state->users and the groups into
 392          * state->groups for the next iteration.
 393          */
 394
 395         for (i=0; i<num_members; i++) {
 396                 switch (members[i].type) {
 397                 case SID_NAME_USER:
 398                 case SID_NAME_COMPUTER: {
 399                         /*
 400                          * Add a copy of members[i] to state->users
 401                          */
 402                         struct wbint_Principal *m;
 403                         struct dom_sid *sid;
 404                         DATA_BLOB key;
 405
 406                         m = talloc(talloc_tos(), struct wbint_Principal);
 407                         if (tevent_req_nomem(m, req)) {
 408                                 return;
 409                         }
 410                         sid_copy(&m->sid, &members[i].sid);
 411                         m->name = talloc_move(m, &members[i].name);
 412                         m->type = members[i].type;
 413
 414                         sid = &members[i].sid;
 415                         key = data_blob_const(
 416                                 sid, ndr_size_dom_sid(sid, NULL, 0));
 417
 418                         if (!talloc_dict_set(state->users, key, &m)) {
 419                                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 420                                 return;
 421                         }
 422                         break;
 423                 }
 424                 case SID_NAME_DOM_GRP:
 425                 case SID_NAME_ALIAS:
 426                 case SID_NAME_WKN_GRP: {
 427                         struct wbint_Principal *g;
 428                         /*
 429                          * Save members[i] for the next round
 430                          */
 431                         g = &state->groups[num_groups];
 432                         sid_copy(&g->sid, &members[i].sid);
 433                         g->name = talloc_move(state->groups, &members[i].name);
 434                         g->type = members[i].type;
 435                         num_groups += 1;
 436                         break;
 437                 }
 438                 default:
 439                         /* Ignore everything else */
 440                         break;
 441                 }
 442         }
 443
 444         status = wb_group_members_next_subreq(state, state, &subreq);
 445         if (!NT_STATUS_IS_OK(status)) {
 446                 tevent_req_nterror(req, status);
 447                 return;
 448         }
 449         if (subreq == NULL) {
 450                 tevent_req_done(req);
 451                 return;
 452         }
 453         tevent_req_set_callback(subreq, wb_group_members_done, req);
 454 }
 455
 456 NTSTATUS wb_group_members_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 457                                struct talloc_dict **members)
 458 {
 459         struct wb_group_members_state *state = tevent_req_data(
 460                 req, struct wb_group_members_state);
 461         NTSTATUS status;
 462
 463         if (tevent_req_is_nterror(req, &status)) {
 464                 return status;
 465         }
 466         *members = talloc_move(mem_ctx, &state->users);
 467         return NT_STATUS_OK;
 468 }