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 /* Query display info for a domain.  This returns enough information plus a
  32    bit extra to give an overview of domain users for the User Manager
  33    application. */
  34 static NTSTATUS query_user_list(struct winbindd_domain *domain,
  35                                TALLOC_CTX *mem_ctx,
  36                                uint32 *num_entries,
  37                                WINBIND_USERINFO **info)
  38 {
  39         /* We don't have users */
  40         *num_entries = 0;
  41         *info = NULL;
  42         return NT_STATUS_OK;
  43 }
  44
  45 /* list all domain groups */
  46 static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
  47                                 TALLOC_CTX *mem_ctx,
  48                                 uint32 *num_entries,
  49                                 struct acct_info **info)
  50 {
  51         /* We don't have domain groups */
  52         *num_entries = 0;
  53         *info = NULL;
  54         return NT_STATUS_OK;
  55 }
  56
  57 /* List all domain groups */
  58
  59 static NTSTATUS enum_local_groups(struct winbindd_domain *domain,
  60                                 TALLOC_CTX *mem_ctx,
  61                                 uint32 *num_entries,
  62                                 struct acct_info **info)
  63 {
  64         struct pdb_search *search;
  65         struct samr_displayentry *aliases;
  66         int i;
  67         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
  68
  69         search = pdb_search_aliases(&domain->sid);
  70         if (search == NULL) goto done;
  71
  72         *num_entries = pdb_search_entries(search, 0, 0xffffffff, &aliases);
  73         if (*num_entries == 0) goto done;
  74
  75         *info = TALLOC_ARRAY(mem_ctx, struct acct_info, *num_entries);
  76         if (*info == NULL) {
  77                 result = NT_STATUS_NO_MEMORY;
  78                 goto done;
  79         }
  80
  81         for (i=0; i<*num_entries; i++) {
  82                 fstrcpy((*info)[i].acct_name, aliases[i].account_name);
  83                 fstrcpy((*info)[i].acct_desc, aliases[i].description);
  84                 (*info)[i].rid = aliases[i].rid;
  85         }
  86
  87         result = NT_STATUS_OK;
  88  done:
  89         pdb_search_destroy(search);
  90         return result;
  91 }
  92
  93 /* convert a single name to a sid in a domain */
  94 static NTSTATUS name_to_sid(struct winbindd_domain *domain,
  95                             TALLOC_CTX *mem_ctx,
  96                             const char *domain_name,
  97                             const char *name,
  98                             DOM_SID *sid,
  99                             enum lsa_SidType *type)
 100 {
 101         DEBUG(10, ("Finding name %s\n", name));
 102
 103         if ( !lookup_name( mem_ctx, name, LOOKUP_NAME_ALL,
 104                 NULL, NULL, sid, type ) )
 105         {
 106                 return NT_STATUS_NONE_MAPPED;
 107         }
 108
 109         return NT_STATUS_OK;
 110 }
 111
 112 /*
 113   convert a domain SID to a user or group name
 114 */
 115 static NTSTATUS sid_to_name(struct winbindd_domain *domain,
 116                             TALLOC_CTX *mem_ctx,
 117                             const DOM_SID *sid,
 118                             char **domain_name,
 119                             char **name,
 120                             enum lsa_SidType *type)
 121 {
 122         const char *dom, *nam;
 123
 124         DEBUG(10, ("Converting SID %s\n", sid_string_static(sid)));
 125
 126         /* Paranoia check */
 127         if (!sid_check_is_in_builtin(sid) &&
 128             !sid_check_is_in_our_domain(sid)) {
 129                 DEBUG(0, ("Possible deadlock: Trying to lookup SID %s with "
 130                           "passdb backend\n", sid_string_static(sid)));
 131                 return NT_STATUS_NONE_MAPPED;
 132         }
 133
 134         if (!lookup_sid(mem_ctx, sid, &dom, &nam, type)) {
 135                 return NT_STATUS_NONE_MAPPED;
 136         }
 137
 138         *domain_name = talloc_strdup(mem_ctx, dom);
 139         *name = talloc_strdup(mem_ctx, nam);
 140
 141         return NT_STATUS_OK;
 142 }
 143
 144 static NTSTATUS rids_to_names(struct winbindd_domain *domain,
 145                               TALLOC_CTX *mem_ctx,
 146                               const DOM_SID *sid,
 147                               uint32 *rids,
 148                               size_t num_rids,
 149                               char **domain_name,
 150                               char ***names,
 151                               enum lsa_SidType **types)
 152 {
 153         return NT_STATUS_UNSUCCESSFUL;
 154 }
 155
 156 /* Lookup user information from a rid or username. */
 157 static NTSTATUS query_user(struct winbindd_domain *domain,
 158                            TALLOC_CTX *mem_ctx,
 159                            const DOM_SID *user_sid,
 160                            WINBIND_USERINFO *user_info)
 161 {
 162         return NT_STATUS_NO_SUCH_USER;
 163 }
 164
 165 /* Lookup groups a user is a member of.  I wish Unix had a call like this! */
 166 static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
 167                                   TALLOC_CTX *mem_ctx,
 168                                   const DOM_SID *user_sid,
 169                                   uint32 *num_groups, DOM_SID **user_gids)
 170 {
 171         NTSTATUS result;
 172         DOM_SID *groups = NULL;
 173         gid_t *gids = NULL;
 174         size_t ngroups = 0;
 175         struct samu *user;
 176
 177         if ( (user = samu_new(mem_ctx)) == NULL ) {
 178                 return NT_STATUS_NO_MEMORY;
 179         }
 180
 181         if ( !pdb_getsampwsid( user, user_sid ) ) {
 182                 return NT_STATUS_NO_SUCH_USER;
 183         }
 184
 185         result = pdb_enum_group_memberships( mem_ctx, user, &groups, &gids, &ngroups );
 186
 187         TALLOC_FREE( user );
 188
 189         *num_groups = (uint32)ngroups;
 190         *user_gids = groups;
 191
 192         return result;
 193 }
 194
 195 static NTSTATUS lookup_useraliases(struct winbindd_domain *domain,
 196                                    TALLOC_CTX *mem_ctx,
 197                                    uint32 num_sids, const DOM_SID *sids,
 198                                    uint32 *p_num_aliases, uint32 **rids)
 199 {
 200         NTSTATUS result;
 201         size_t num_aliases = 0;
 202
 203         result = pdb_enum_alias_memberships(mem_ctx, &domain->sid,
 204                                             sids, num_sids, rids, &num_aliases);
 205
 206         *p_num_aliases = num_aliases;
 207         return result;
 208 }
 209
 210 /* Lookup group membership given a rid.   */
 211 static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
 212                                 TALLOC_CTX *mem_ctx,
 213                                 const DOM_SID *group_sid, uint32 *num_names,
 214                                 DOM_SID **sid_mem, char ***names,
 215                                 uint32 **name_types)
 216 {
 217         size_t i, num_members, num_mapped;
 218         uint32 *rids;
 219         NTSTATUS result;
 220         const DOM_SID **sids;
 221         struct lsa_dom_info *lsa_domains;
 222         struct lsa_name_info *lsa_names;
 223         TALLOC_CTX *tmp_ctx;
 224
 225         if (!sid_check_is_in_our_domain(group_sid)) {
 226                 /* There's no groups, only aliases in BUILTIN */
 227                 return NT_STATUS_NO_SUCH_GROUP;
 228         }
 229
 230         if (!(tmp_ctx = talloc_init("lookup_groupmem"))) {
 231                 return NT_STATUS_NO_MEMORY;
 232         }
 233
 234         result = pdb_enum_group_members(tmp_ctx, group_sid, &rids,
 235                                         &num_members);
 236         if (!NT_STATUS_IS_OK(result)) {
 237                 TALLOC_FREE(tmp_ctx);
 238                 return result;
 239         }
 240
 241         if (num_members == 0) {
 242                 *num_names = 0;
 243                 *sid_mem = NULL;
 244                 *names = NULL;
 245                 *name_types = NULL;
 246                 TALLOC_FREE(tmp_ctx);
 247                 return NT_STATUS_OK;
 248         }
 249
 250         *sid_mem = TALLOC_ARRAY(mem_ctx, DOM_SID, num_members);
 251         *names = TALLOC_ARRAY(mem_ctx, char *, num_members);
 252         *name_types = TALLOC_ARRAY(mem_ctx, uint32, num_members);
 253         sids = TALLOC_ARRAY(tmp_ctx, const DOM_SID *, num_members);
 254
 255         if (((*sid_mem) == NULL) || ((*names) == NULL) ||
 256             ((*name_types) == NULL) || (sids == NULL)) {
 257                 TALLOC_FREE(tmp_ctx);
 258                 return NT_STATUS_NO_MEMORY;
 259         }
 260
 261         /*
 262          * Prepare an array of sid pointers for the lookup_sids calling
 263          * convention.
 264          */
 265
 266         for (i=0; i<num_members; i++) {
 267                 DOM_SID *sid = &((*sid_mem)[i]);
 268                 if (!sid_compose(sid, &domain->sid, rids[i])) {
 269                         TALLOC_FREE(tmp_ctx);
 270                         return NT_STATUS_INTERNAL_ERROR;
 271                 }
 272                 sids[i] = sid;
 273         }
 274
 275         result = lookup_sids(tmp_ctx, num_members, sids, 1,
 276                              &lsa_domains, &lsa_names);
 277         if (!NT_STATUS_IS_OK(result)) {
 278                 TALLOC_FREE(tmp_ctx);
 279                 return result;
 280         }
 281
 282         num_mapped = 0;
 283         for (i=0; i<num_members; i++) {
 284                 if (lsa_names[i].type != SID_NAME_USER) {
 285                         DEBUG(2, ("Got %s as group member -- ignoring\n",
 286                                   sid_type_lookup(lsa_names[i].type)));
 287                         continue;
 288                 }
 289                 if (!((*names)[i] = talloc_strdup((*names),
 290                                                   lsa_names[i].name))) {
 291                         TALLOC_FREE(tmp_ctx);
 292                         return NT_STATUS_NO_MEMORY;
 293                 }
 294
 295                 (*name_types)[i] = lsa_names[i].type;
 296
 297                 num_mapped += 1;
 298         }
 299
 300         *num_names = num_mapped;
 301
 302         TALLOC_FREE(tmp_ctx);
 303         return NT_STATUS_OK;
 304 }
 305
 306 /* find the sequence number for a domain */
 307 static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
 308 {
 309         BOOL result;
 310         time_t seq_num;
 311
 312         result = pdb_get_seq_num(&seq_num);
 313         if (!result) {
 314                 *seq = 1;
 315         }
 316
 317         *seq = (int) seq_num;
 318         /* *seq = 1; */
 319         return NT_STATUS_OK;
 320 }
 321
 322 static NTSTATUS lockout_policy(struct winbindd_domain *domain,
 323                                TALLOC_CTX *mem_ctx,
 324                                SAM_UNK_INFO_12 *policy)
 325 {
 326         /* actually we have that */
 327         return NT_STATUS_NOT_IMPLEMENTED;
 328 }
 329
 330 static NTSTATUS password_policy(struct winbindd_domain *domain,
 331                                 TALLOC_CTX *mem_ctx,
 332                                 SAM_UNK_INFO_1 *policy)
 333 {
 334         uint32 min_pass_len,pass_hist,password_properties;
 335         time_t u_expire, u_min_age;
 336         NTTIME nt_expire, nt_min_age;
 337         uint32 account_policy_temp;
 338
 339         if ((policy = TALLOC_ZERO_P(mem_ctx, SAM_UNK_INFO_1)) == NULL) {
 340                 return NT_STATUS_NO_MEMORY;
 341         }
 342
 343         if (!pdb_get_account_policy(AP_MIN_PASSWORD_LEN, &account_policy_temp)) {
 344                 return NT_STATUS_ACCESS_DENIED;
 345         }
 346         min_pass_len = account_policy_temp;
 347
 348         if (!pdb_get_account_policy(AP_PASSWORD_HISTORY, &account_policy_temp)) {
 349                 return NT_STATUS_ACCESS_DENIED;
 350         }
 351         pass_hist = account_policy_temp;
 352
 353         if (!pdb_get_account_policy(AP_USER_MUST_LOGON_TO_CHG_PASS, &account_policy_temp)) {
 354                 return NT_STATUS_ACCESS_DENIED;
 355         }
 356         password_properties = account_policy_temp;
 357
 358         if (!pdb_get_account_policy(AP_MAX_PASSWORD_AGE, &account_policy_temp)) {
 359                 return NT_STATUS_ACCESS_DENIED;
 360         }
 361         u_expire = account_policy_temp;
 362
 363         if (!pdb_get_account_policy(AP_MIN_PASSWORD_AGE, &account_policy_temp)) {
 364                 return NT_STATUS_ACCESS_DENIED;
 365         }
 366         u_min_age = account_policy_temp;
 367
 368         unix_to_nt_time_abs(&nt_expire, u_expire);
 369         unix_to_nt_time_abs(&nt_min_age, u_min_age);
 370
 371         init_unk_info1(policy, (uint16)min_pass_len, (uint16)pass_hist,
 372                        password_properties, nt_expire, nt_min_age);
 373
 374         return NT_STATUS_OK;
 375 }
 376
 377 /* get a list of trusted domains */
 378 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
 379                                 TALLOC_CTX *mem_ctx,
 380                                 uint32 *num_domains,
 381                                 char ***names,
 382                                 char ***alt_names,
 383                                 DOM_SID **dom_sids)
 384 {
 385         NTSTATUS nt_status;
 386         struct trustdom_info **domains;
 387         int i;
 388         TALLOC_CTX *tmp_ctx;
 389
 390         *num_domains = 0;
 391         *names = NULL;
 392         *alt_names = NULL;
 393         *dom_sids = NULL;
 394
 395         if (!(tmp_ctx = talloc_init("trusted_domains"))) {
 396                 return NT_STATUS_NO_MEMORY;
 397         }
 398
 399         nt_status = secrets_trusted_domains(tmp_ctx, num_domains,
 400                                             &domains);
 401         if (!NT_STATUS_IS_OK(nt_status)) {
 402                 TALLOC_FREE(tmp_ctx);
 403                 return nt_status;
 404         }
 405
 406         if (*num_domains) {
 407                 *names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 408                 *alt_names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 409                 *dom_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_domains);
 410
 411                 if ((*alt_names == NULL) || (*names == NULL) || (*dom_sids == NULL)) {
 412                         TALLOC_FREE(tmp_ctx);
 413                         return NT_STATUS_NO_MEMORY;
 414                 }
 415         } else {
 416                 *names = NULL;
 417                 *alt_names = NULL;
 418                 *dom_sids = NULL;
 419         }
 420
 421         for (i=0; i<*num_domains; i++) {
 422                 (*alt_names)[i] = NULL;
 423                 if (!((*names)[i] = talloc_strdup((*names),
 424                                                   domains[i]->name))) {
 425                         TALLOC_FREE(tmp_ctx);
 426                         return NT_STATUS_NO_MEMORY;
 427                 }
 428                 sid_copy(&(*dom_sids)[i], &domains[i]->sid);
 429         }
 430
 431         TALLOC_FREE(tmp_ctx);
 432         return NT_STATUS_OK;
 433 }
 434
 435 /* the rpc backend methods are exposed via this structure */
 436 struct winbindd_methods passdb_methods = {
 437         False,
 438         query_user_list,
 439         enum_dom_groups,
 440         enum_local_groups,
 441         name_to_sid,
 442         sid_to_name,
 443         rids_to_names,
 444         query_user,
 445         lookup_usergroups,
 446         lookup_useraliases,
 447         lookup_groupmem,
 448         sequence_number,
 449         lockout_policy,
 450         password_policy,
 451         trusted_domains,
 452 };