source/nsswitch/winbindd_passdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind rpc backend functions
   5
   6    Copyright (C) Tim Potter 2000-2001,2003
   7    Copyright (C) Simo Sorce 2003
   8    Copyright (C) Volker Lendecke 2004
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_WINBIND
  30
  31 static void
  32 add_member(const char *domain, const char *user,
  33            char **members, int *num_members)
  34 {
  35         fstring name;
  36
  37         fill_domain_username(name, domain, user);
  38         safe_strcat(name, ",", sizeof(name)-1);
  39         string_append(members, name);
  40         *num_members += 1;
  41 }
  42
  43 /**********************************************************************
  44  Add member users resulting from sid. Expand if it is a domain group.
  45 **********************************************************************/
  46
  47 static void
  48 add_expanded_sid(const DOM_SID *sid, char **members, int *num_members)
  49 {
  50         DOM_SID dom_sid;
  51         uint32 rid;
  52         struct winbindd_domain *domain;
  53         int i;
  54
  55         char *domain_name = NULL;
  56         char *name = NULL;
  57         enum SID_NAME_USE type;
  58
  59         uint32 num_names;
  60         DOM_SID **sid_mem;
  61         char **names;
  62         uint32 *types;
  63
  64         NTSTATUS result;
  65
  66         TALLOC_CTX *mem_ctx = talloc_init("add_expanded_sid");
  67
  68         if (mem_ctx == NULL) {
  69                 DEBUG(1, ("talloc_init failed\n"));
  70                 return;
  71         }
  72
  73         sid_copy(&dom_sid, sid);
  74         sid_split_rid(&dom_sid, &rid);
  75
  76         domain = find_lookup_domain_from_sid(sid);
  77
  78         if (domain == NULL) {
  79                 DEBUG(3, ("Could not find domain for sid %s\n",
  80                           sid_string_static(sid)));
  81                 goto done;
  82         }
  83
  84         result = domain->methods->sid_to_name(domain, mem_ctx, sid,
  85                                               &domain_name, &name, &type);
  86
  87         if (!NT_STATUS_IS_OK(result)) {
  88                 DEBUG(3, ("sid_to_name failed for sid %s\n",
  89                           sid_string_static(sid)));
  90                 goto done;
  91         }
  92
  93         DEBUG(10, ("Found name %s, type %d\n", name, type));
  94
  95         if (type == SID_NAME_USER) {
  96                 add_member(domain_name, name, members, num_members);
  97                 goto done;
  98         }
  99
 100         if (type != SID_NAME_DOM_GRP) {
 101                 DEBUG(10, ("Alias member %s neither user nor group, ignore\n",
 102                            name));
 103                 goto done;
 104         }
 105
 106         /* Expand the domain group, this must be done via the target domain */
 107
 108         domain = find_domain_from_sid(sid);
 109
 110         if (domain == NULL) {
 111                 DEBUG(3, ("Could not find domain from SID %s\n",
 112                           sid_string_static(sid)));
 113                 goto done;
 114         }
 115
 116         result = domain->methods->lookup_groupmem(domain, mem_ctx,
 117                                                   sid, &num_names,
 118                                                   &sid_mem, &names,
 119                                                   &types);
 120
 121         if (!NT_STATUS_IS_OK(result)) {
 122                 DEBUG(10, ("Could not lookup group members for %s: %s\n",
 123                            name, nt_errstr(result)));
 124                 goto done;
 125         }
 126
 127         for (i=0; i<num_names; i++) {
 128                 DEBUG(10, ("Adding group member SID %s\n",
 129                            sid_string_static(sid_mem[i])));
 130
 131                 if (types[i] != SID_NAME_USER) {
 132                         DEBUG(1, ("Hmmm. Member %s of group %s is no user. "
 133                                   "Ignoring.\n", names[i], name));
 134                         continue;
 135                 }
 136
 137                 add_member(domain->name, names[i], members, num_members);
 138         }
 139
 140  done:
 141         talloc_destroy(mem_ctx);
 142         return;
 143 }
 144
 145 BOOL fill_passdb_alias_grmem(struct winbindd_domain *domain,
 146                              DOM_SID *group_sid,
 147                              int *num_gr_mem, char **gr_mem, int *gr_mem_len)
 148 {
 149         DOM_SID *members;
 150         int i, num_members;
 151
 152         *num_gr_mem = 0;
 153         *gr_mem = NULL;
 154         *gr_mem_len = 0;
 155
 156         if (!pdb_enum_aliasmem(group_sid, &members, &num_members))
 157                 return True;
 158
 159         for (i=0; i<num_members; i++) {
 160                 add_expanded_sid(&members[i], gr_mem, num_gr_mem);
 161         }
 162
 163         SAFE_FREE(members);
 164
 165         if (*gr_mem != NULL) {
 166                 int len;
 167
 168                 /* We have at least one member, strip off the last "," */
 169                 len = strlen(*gr_mem);
 170                 (*gr_mem)[len-1] = '\0';
 171                 *gr_mem_len = len;
 172         }
 173
 174         return True;
 175 }
 176
 177 /* Query display info for a domain.  This returns enough information plus a
 178    bit extra to give an overview of domain users for the User Manager
 179    application. */
 180 static NTSTATUS query_user_list(struct winbindd_domain *domain,
 181                                TALLOC_CTX *mem_ctx,
 182                                uint32 *num_entries,
 183                                WINBIND_USERINFO **info)
 184 {
 185         /* We don't have users */
 186         *num_entries = 0;
 187         *info = NULL;
 188         return NT_STATUS_OK;
 189 }
 190
 191 /* list all domain groups */
 192 static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
 193                                 TALLOC_CTX *mem_ctx,
 194                                 uint32 *num_entries,
 195                                 struct acct_info **info)
 196 {
 197         /* We don't have domain groups */
 198         *num_entries = 0;
 199         *info = NULL;
 200         return NT_STATUS_OK;
 201 }
 202
 203 /* List all domain groups */
 204
 205 static NTSTATUS enum_local_groups(struct winbindd_domain *domain,
 206                                 TALLOC_CTX *mem_ctx,
 207                                 uint32 *num_entries,
 208                                 struct acct_info **info)
 209 {
 210         struct acct_info *talloced_info;
 211
 212         /* Hmm. One billion aliases should be enough for a start */
 213
 214         if (!pdb_enum_aliases(&domain->sid, 0, 1000000000,
 215                               num_entries, info)) {
 216                 /* Nothing to report, just exit. */
 217                 return NT_STATUS_OK;
 218         }
 219
 220         talloced_info = (struct acct_info *)TALLOC_MEMDUP(mem_ctx, *info,
 221                               *num_entries * sizeof(struct acct_info));
 222
 223         SAFE_FREE(*info);
 224         *info = talloced_info;
 225
 226         return NT_STATUS_OK;
 227 }
 228
 229 /* convert a single name to a sid in a domain */
 230 static NTSTATUS name_to_sid(struct winbindd_domain *domain,
 231                             TALLOC_CTX *mem_ctx,
 232                             const char *domain_name,
 233                             const char *name,
 234                             DOM_SID *sid,
 235                             enum SID_NAME_USE *type)
 236 {
 237         DEBUG(10, ("Finding name %s\n", name));
 238
 239         if (!pdb_find_alias(name, sid))
 240                 return NT_STATUS_NONE_MAPPED;
 241
 242         if (sid_check_is_in_builtin(sid))
 243                 *type = SID_NAME_WKN_GRP;
 244         else
 245                 *type = SID_NAME_ALIAS;
 246
 247         return NT_STATUS_OK;
 248 }
 249
 250 /*
 251   convert a domain SID to a user or group name
 252 */
 253 static NTSTATUS sid_to_name(struct winbindd_domain *domain,
 254                             TALLOC_CTX *mem_ctx,
 255                             const DOM_SID *sid,
 256                             char **domain_name,
 257                             char **name,
 258                             enum SID_NAME_USE *type)
 259 {
 260         struct acct_info info;
 261
 262         DEBUG(10, ("Converting SID %s\n", sid_string_static(sid)));
 263
 264         if (!pdb_get_aliasinfo(sid, &info))
 265                 return NT_STATUS_NONE_MAPPED;
 266
 267         *domain_name = talloc_strdup(mem_ctx, domain->name);
 268         *name = talloc_strdup(mem_ctx, info.acct_name);
 269         if (sid_check_is_in_builtin(sid))
 270                 *type = SID_NAME_WKN_GRP;
 271         else
 272                 *type = SID_NAME_ALIAS;
 273
 274         return NT_STATUS_OK;
 275 }
 276
 277 /* Lookup user information from a rid or username. */
 278 static NTSTATUS query_user(struct winbindd_domain *domain,
 279                            TALLOC_CTX *mem_ctx,
 280                            const DOM_SID *user_sid,
 281                            WINBIND_USERINFO *user_info)
 282 {
 283         return NT_STATUS_NO_SUCH_USER;
 284 }
 285
 286 /* Lookup groups a user is a member of.  I wish Unix had a call like this! */
 287 static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
 288                                   TALLOC_CTX *mem_ctx,
 289                                   const DOM_SID *user_sid,
 290                                   uint32 *num_groups, DOM_SID ***user_gids)
 291 {
 292         return NT_STATUS_NO_SUCH_USER;
 293 }
 294
 295 static NTSTATUS lookup_useraliases(struct winbindd_domain *domain,
 296                                    TALLOC_CTX *mem_ctx,
 297                                    uint32 num_sids, DOM_SID **sids,
 298                                    uint32 *num_aliases, uint32 **aliases)
 299 {
 300         return NT_STATUS_NO_SUCH_USER;
 301 }
 302
 303 /* Lookup group membership given a rid.   */
 304 static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
 305                                 TALLOC_CTX *mem_ctx,
 306                                 const DOM_SID *group_sid, uint32 *num_names,
 307                                 DOM_SID ***sid_mem, char ***names,
 308                                 uint32 **name_types)
 309 {
 310         return NT_STATUS_OK;
 311 }
 312
 313 /* find the sequence number for a domain */
 314 static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
 315 {
 316         *seq = 1;
 317         return NT_STATUS_OK;
 318 }
 319
 320 /* get a list of trusted domains */
 321 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
 322                                 TALLOC_CTX *mem_ctx,
 323                                 uint32 *num_domains,
 324                                 char ***names,
 325                                 char ***alt_names,
 326                                 DOM_SID **dom_sids)
 327 {
 328         NTSTATUS nt_status;
 329         int enum_ctx = 0;
 330         int num_sec_domains;
 331         TRUSTDOM **domains;
 332         *num_domains = 0;
 333         *names = NULL;
 334         *alt_names = NULL;
 335         *dom_sids = NULL;
 336         do {
 337                 int i;
 338                 nt_status = secrets_get_trusted_domains(mem_ctx, &enum_ctx, 1,
 339                                                         &num_sec_domains,
 340                                                         &domains);
 341                 *names = TALLOC_REALLOC_ARRAY(mem_ctx, *names, char *,
 342                                         num_sec_domains + *num_domains);
 343                 *alt_names = TALLOC_REALLOC_ARRAY(mem_ctx, *alt_names, char *,
 344                                             num_sec_domains + *num_domains);
 345                 *dom_sids = TALLOC_REALLOC_ARRAY(mem_ctx, *dom_sids, DOM_SID,
 346                                            num_sec_domains + *num_domains);
 347
 348                 for (i=0; i< num_sec_domains; i++) {
 349                         if (pull_ucs2_talloc(mem_ctx, &(*names)[*num_domains],
 350                                              domains[i]->name) == -1) {
 351                                 return NT_STATUS_NO_MEMORY;
 352                         }
 353                         (*alt_names)[*num_domains] = NULL;
 354                         (*dom_sids)[*num_domains] = domains[i]->sid;
 355                         (*num_domains)++;
 356                 }
 357
 358         } while (NT_STATUS_EQUAL(nt_status, STATUS_MORE_ENTRIES));
 359
 360         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_MORE_ENTRIES)) {
 361                 return NT_STATUS_OK;
 362         }
 363         return nt_status;
 364 }
 365
 366 /* find the domain sid for a domain */
 367 static NTSTATUS domain_sid(struct winbindd_domain *domain, DOM_SID *sid)
 368 {
 369         sid_copy(sid, &domain->sid);
 370         return NT_STATUS_OK;
 371 }
 372
 373 /* find alternate names list for the domain
 374  * should we look for netbios aliases??
 375                                 SSS     */
 376 static NTSTATUS alternate_name(struct winbindd_domain *domain)
 377 {
 378         DEBUG(3,("pdb: alternate_name\n"));
 379
 380         return NT_STATUS_OK;
 381 }
 382
 383
 384 /* the rpc backend methods are exposed via this structure */
 385 struct winbindd_methods passdb_methods = {
 386         False,
 387         query_user_list,
 388         enum_dom_groups,
 389         enum_local_groups,
 390         name_to_sid,
 391         sid_to_name,
 392         query_user,
 393         lookup_usergroups,
 394         lookup_useraliases,
 395         lookup_groupmem,
 396         sequence_number,
 397         trusted_domains,
 398         domain_sid,
 399         alternate_name
 400 };