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 3 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, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "winbindd.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_WINBIND
  29
  30 /* Query display info for a domain.  This returns enough information plus a
  31    bit extra to give an overview of domain users for the User Manager
  32    application. */
  33 static NTSTATUS query_user_list(struct winbindd_domain *domain,
  34                                TALLOC_CTX *mem_ctx,
  35                                uint32 *num_entries,
  36                                WINBIND_USERINFO **info)
  37 {
  38         /* We don't have users */
  39         *num_entries = 0;
  40         *info = NULL;
  41         return NT_STATUS_OK;
  42 }
  43
  44 /* list all domain groups */
  45 static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
  46                                 TALLOC_CTX *mem_ctx,
  47                                 uint32 *num_entries,
  48                                 struct acct_info **info)
  49 {
  50         /* We don't have domain groups */
  51         *num_entries = 0;
  52         *info = NULL;
  53         return NT_STATUS_OK;
  54 }
  55
  56 /* List all domain groups */
  57
  58 static NTSTATUS enum_local_groups(struct winbindd_domain *domain,
  59                                 TALLOC_CTX *mem_ctx,
  60                                 uint32 *num_entries,
  61                                 struct acct_info **info)
  62 {
  63         struct pdb_search *search;
  64         struct samr_displayentry *aliases;
  65         int i;
  66         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
  67
  68         search = pdb_search_aliases(&domain->sid);
  69         if (search == NULL) goto done;
  70
  71         *num_entries = pdb_search_entries(search, 0, 0xffffffff, &aliases);
  72         if (*num_entries == 0) goto done;
  73
  74         *info = TALLOC_ARRAY(mem_ctx, struct acct_info, *num_entries);
  75         if (*info == NULL) {
  76                 result = NT_STATUS_NO_MEMORY;
  77                 goto done;
  78         }
  79
  80         for (i=0; i<*num_entries; i++) {
  81                 fstrcpy((*info)[i].acct_name, aliases[i].account_name);
  82                 fstrcpy((*info)[i].acct_desc, aliases[i].description);
  83                 (*info)[i].rid = aliases[i].rid;
  84         }
  85
  86         result = NT_STATUS_OK;
  87  done:
  88         pdb_search_destroy(search);
  89         return result;
  90 }
  91
  92 /* convert a single name to a sid in a domain */
  93 static NTSTATUS name_to_sid(struct winbindd_domain *domain,
  94                             TALLOC_CTX *mem_ctx,
  95                             enum winbindd_cmd original_cmd,
  96                             const char *domain_name,
  97                             const char *name,
  98                             DOM_SID *sid,
  99                             enum lsa_SidType *type)
 100 {
 101         uint32 flags = LOOKUP_NAME_ALL;
 102
 103         switch ( original_cmd ) {
 104         case WINBINDD_LOOKUPNAME:
 105                 /* This call is ok */
 106                 break;
 107         default:
 108                 /* Avoid any NSS calls in the lookup_name by default */
 109                 flags |= LOOKUP_NAME_EXPLICIT;
 110                 DEBUG(10,("winbindd_passdb: limiting name_to_sid() to explicit mappings\n"));
 111                 break;
 112         }
 113
 114         DEBUG(10, ("Finding name %s\n", name));
 115
 116         if ( !lookup_name( mem_ctx, name, flags, NULL, NULL, sid, type ) ) {
 117                 return NT_STATUS_NONE_MAPPED;
 118         }
 119
 120         return NT_STATUS_OK;
 121 }
 122
 123 /*
 124   convert a domain SID to a user or group name
 125 */
 126 static NTSTATUS sid_to_name(struct winbindd_domain *domain,
 127                             TALLOC_CTX *mem_ctx,
 128                             const DOM_SID *sid,
 129                             char **domain_name,
 130                             char **name,
 131                             enum lsa_SidType *type)
 132 {
 133         const char *dom, *nam;
 134
 135         DEBUG(10, ("Converting SID %s\n", sid_string_static(sid)));
 136
 137         /* Paranoia check */
 138         if (!sid_check_is_in_builtin(sid) &&
 139             !sid_check_is_in_our_domain(sid) &&
 140             !sid_check_is_in_unix_users(sid) &&
 141             !sid_check_is_unix_users(sid) &&
 142             !sid_check_is_in_unix_groups(sid) &&
 143             !sid_check_is_unix_groups(sid) )
 144         {
 145                 DEBUG(0, ("Possible deadlock: Trying to lookup SID %s with "
 146                           "passdb backend\n", sid_string_static(sid)));
 147                 return NT_STATUS_NONE_MAPPED;
 148         }
 149
 150         if (!lookup_sid(mem_ctx, sid, &dom, &nam, type)) {
 151                 return NT_STATUS_NONE_MAPPED;
 152         }
 153
 154         *domain_name = talloc_strdup(mem_ctx, dom);
 155         *name = talloc_strdup(mem_ctx, nam);
 156
 157         return NT_STATUS_OK;
 158 }
 159
 160 static NTSTATUS rids_to_names(struct winbindd_domain *domain,
 161                               TALLOC_CTX *mem_ctx,
 162                               const DOM_SID *sid,
 163                               uint32 *rids,
 164                               size_t num_rids,
 165                               char **domain_name,
 166                               char ***names,
 167                               enum lsa_SidType **types)
 168 {
 169         return NT_STATUS_UNSUCCESSFUL;
 170 }
 171
 172 /* Lookup user information from a rid or username. */
 173 static NTSTATUS query_user(struct winbindd_domain *domain,
 174                            TALLOC_CTX *mem_ctx,
 175                            const DOM_SID *user_sid,
 176                            WINBIND_USERINFO *user_info)
 177 {
 178         return NT_STATUS_NO_SUCH_USER;
 179 }
 180
 181 /* Lookup groups a user is a member of.  I wish Unix had a call like this! */
 182 static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
 183                                   TALLOC_CTX *mem_ctx,
 184                                   const DOM_SID *user_sid,
 185                                   uint32 *num_groups, DOM_SID **user_gids)
 186 {
 187         NTSTATUS result;
 188         DOM_SID *groups = NULL;
 189         gid_t *gids = NULL;
 190         size_t ngroups = 0;
 191         struct samu *user;
 192
 193         if ( (user = samu_new(mem_ctx)) == NULL ) {
 194                 return NT_STATUS_NO_MEMORY;
 195         }
 196
 197         if ( !pdb_getsampwsid( user, user_sid ) ) {
 198                 return NT_STATUS_NO_SUCH_USER;
 199         }
 200
 201         result = pdb_enum_group_memberships( mem_ctx, user, &groups, &gids, &ngroups );
 202
 203         TALLOC_FREE( user );
 204
 205         *num_groups = (uint32)ngroups;
 206         *user_gids = groups;
 207
 208         return result;
 209 }
 210
 211 static NTSTATUS lookup_useraliases(struct winbindd_domain *domain,
 212                                    TALLOC_CTX *mem_ctx,
 213                                    uint32 num_sids, const DOM_SID *sids,
 214                                    uint32 *p_num_aliases, uint32 **rids)
 215 {
 216         NTSTATUS result;
 217         size_t num_aliases = 0;
 218
 219         result = pdb_enum_alias_memberships(mem_ctx, &domain->sid,
 220                                             sids, num_sids, rids, &num_aliases);
 221
 222         *p_num_aliases = num_aliases;
 223         return result;
 224 }
 225
 226 /* Lookup group membership given a rid.   */
 227 static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
 228                                 TALLOC_CTX *mem_ctx,
 229                                 const DOM_SID *group_sid, uint32 *num_names,
 230                                 DOM_SID **sid_mem, char ***names,
 231                                 uint32 **name_types)
 232 {
 233         size_t i, num_members, num_mapped;
 234         uint32 *rids;
 235         NTSTATUS result;
 236         const DOM_SID **sids;
 237         struct lsa_dom_info *lsa_domains;
 238         struct lsa_name_info *lsa_names;
 239         TALLOC_CTX *tmp_ctx;
 240
 241         if (!sid_check_is_in_our_domain(group_sid)) {
 242                 /* There's no groups, only aliases in BUILTIN */
 243                 return NT_STATUS_NO_SUCH_GROUP;
 244         }
 245
 246         if (!(tmp_ctx = talloc_init("lookup_groupmem"))) {
 247                 return NT_STATUS_NO_MEMORY;
 248         }
 249
 250         result = pdb_enum_group_members(tmp_ctx, group_sid, &rids,
 251                                         &num_members);
 252         if (!NT_STATUS_IS_OK(result)) {
 253                 TALLOC_FREE(tmp_ctx);
 254                 return result;
 255         }
 256
 257         if (num_members == 0) {
 258                 *num_names = 0;
 259                 *sid_mem = NULL;
 260                 *names = NULL;
 261                 *name_types = NULL;
 262                 TALLOC_FREE(tmp_ctx);
 263                 return NT_STATUS_OK;
 264         }
 265
 266         *sid_mem = TALLOC_ARRAY(mem_ctx, DOM_SID, num_members);
 267         *names = TALLOC_ARRAY(mem_ctx, char *, num_members);
 268         *name_types = TALLOC_ARRAY(mem_ctx, uint32, num_members);
 269         sids = TALLOC_ARRAY(tmp_ctx, const DOM_SID *, num_members);
 270
 271         if (((*sid_mem) == NULL) || ((*names) == NULL) ||
 272             ((*name_types) == NULL) || (sids == NULL)) {
 273                 TALLOC_FREE(tmp_ctx);
 274                 return NT_STATUS_NO_MEMORY;
 275         }
 276
 277         /*
 278          * Prepare an array of sid pointers for the lookup_sids calling
 279          * convention.
 280          */
 281
 282         for (i=0; i<num_members; i++) {
 283                 DOM_SID *sid = &((*sid_mem)[i]);
 284                 if (!sid_compose(sid, &domain->sid, rids[i])) {
 285                         TALLOC_FREE(tmp_ctx);
 286                         return NT_STATUS_INTERNAL_ERROR;
 287                 }
 288                 sids[i] = sid;
 289         }
 290
 291         result = lookup_sids(tmp_ctx, num_members, sids, 1,
 292                              &lsa_domains, &lsa_names);
 293         if (!NT_STATUS_IS_OK(result)) {
 294                 TALLOC_FREE(tmp_ctx);
 295                 return result;
 296         }
 297
 298         num_mapped = 0;
 299         for (i=0; i<num_members; i++) {
 300                 if (lsa_names[i].type != SID_NAME_USER) {
 301                         DEBUG(2, ("Got %s as group member -- ignoring\n",
 302                                   sid_type_lookup(lsa_names[i].type)));
 303                         continue;
 304                 }
 305                 if (!((*names)[i] = talloc_strdup((*names),
 306                                                   lsa_names[i].name))) {
 307                         TALLOC_FREE(tmp_ctx);
 308                         return NT_STATUS_NO_MEMORY;
 309                 }
 310
 311                 (*name_types)[i] = lsa_names[i].type;
 312
 313                 num_mapped += 1;
 314         }
 315
 316         *num_names = num_mapped;
 317
 318         TALLOC_FREE(tmp_ctx);
 319         return NT_STATUS_OK;
 320 }
 321
 322 /* find the sequence number for a domain */
 323 static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
 324 {
 325         BOOL result;
 326         time_t seq_num;
 327
 328         result = pdb_get_seq_num(&seq_num);
 329         if (!result) {
 330                 *seq = 1;
 331         }
 332
 333         *seq = (int) seq_num;
 334         /* *seq = 1; */
 335         return NT_STATUS_OK;
 336 }
 337
 338 static NTSTATUS lockout_policy(struct winbindd_domain *domain,
 339                                TALLOC_CTX *mem_ctx,
 340                                SAM_UNK_INFO_12 *policy)
 341 {
 342         /* actually we have that */
 343         return NT_STATUS_NOT_IMPLEMENTED;
 344 }
 345
 346 static NTSTATUS password_policy(struct winbindd_domain *domain,
 347                                 TALLOC_CTX *mem_ctx,
 348                                 SAM_UNK_INFO_1 *policy)
 349 {
 350         uint32 min_pass_len,pass_hist,password_properties;
 351         time_t u_expire, u_min_age;
 352         NTTIME nt_expire, nt_min_age;
 353         uint32 account_policy_temp;
 354
 355         if ((policy = TALLOC_ZERO_P(mem_ctx, SAM_UNK_INFO_1)) == NULL) {
 356                 return NT_STATUS_NO_MEMORY;
 357         }
 358
 359         if (!pdb_get_account_policy(AP_MIN_PASSWORD_LEN, &account_policy_temp)) {
 360                 return NT_STATUS_ACCESS_DENIED;
 361         }
 362         min_pass_len = account_policy_temp;
 363
 364         if (!pdb_get_account_policy(AP_PASSWORD_HISTORY, &account_policy_temp)) {
 365                 return NT_STATUS_ACCESS_DENIED;
 366         }
 367         pass_hist = account_policy_temp;
 368
 369         if (!pdb_get_account_policy(AP_USER_MUST_LOGON_TO_CHG_PASS, &account_policy_temp)) {
 370                 return NT_STATUS_ACCESS_DENIED;
 371         }
 372         password_properties = account_policy_temp;
 373
 374         if (!pdb_get_account_policy(AP_MAX_PASSWORD_AGE, &account_policy_temp)) {
 375                 return NT_STATUS_ACCESS_DENIED;
 376         }
 377         u_expire = account_policy_temp;
 378
 379         if (!pdb_get_account_policy(AP_MIN_PASSWORD_AGE, &account_policy_temp)) {
 380                 return NT_STATUS_ACCESS_DENIED;
 381         }
 382         u_min_age = account_policy_temp;
 383
 384         unix_to_nt_time_abs(&nt_expire, u_expire);
 385         unix_to_nt_time_abs(&nt_min_age, u_min_age);
 386
 387         init_unk_info1(policy, (uint16)min_pass_len, (uint16)pass_hist,
 388                        password_properties, nt_expire, nt_min_age);
 389
 390         return NT_STATUS_OK;
 391 }
 392
 393 /* get a list of trusted domains */
 394 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
 395                                 TALLOC_CTX *mem_ctx,
 396                                 uint32 *num_domains,
 397                                 char ***names,
 398                                 char ***alt_names,
 399                                 DOM_SID **dom_sids)
 400 {
 401         NTSTATUS nt_status;
 402         struct trustdom_info **domains;
 403         int i;
 404         TALLOC_CTX *tmp_ctx;
 405
 406         *num_domains = 0;
 407         *names = NULL;
 408         *alt_names = NULL;
 409         *dom_sids = NULL;
 410
 411         if (!(tmp_ctx = talloc_init("trusted_domains"))) {
 412                 return NT_STATUS_NO_MEMORY;
 413         }
 414
 415         nt_status = pdb_enum_trusteddoms(tmp_ctx, num_domains, &domains);
 416         if (!NT_STATUS_IS_OK(nt_status)) {
 417                 TALLOC_FREE(tmp_ctx);
 418                 return nt_status;
 419         }
 420
 421         if (*num_domains) {
 422                 *names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 423                 *alt_names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 424                 *dom_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_domains);
 425
 426                 if ((*alt_names == NULL) || (*names == NULL) || (*dom_sids == NULL)) {
 427                         TALLOC_FREE(tmp_ctx);
 428                         return NT_STATUS_NO_MEMORY;
 429                 }
 430         } else {
 431                 *names = NULL;
 432                 *alt_names = NULL;
 433                 *dom_sids = NULL;
 434         }
 435
 436         for (i=0; i<*num_domains; i++) {
 437                 (*alt_names)[i] = NULL;
 438                 if (!((*names)[i] = talloc_strdup((*names),
 439                                                   domains[i]->name))) {
 440                         TALLOC_FREE(tmp_ctx);
 441                         return NT_STATUS_NO_MEMORY;
 442                 }
 443                 sid_copy(&(*dom_sids)[i], &domains[i]->sid);
 444         }
 445
 446         TALLOC_FREE(tmp_ctx);
 447         return NT_STATUS_OK;
 448 }
 449
 450 /* the rpc backend methods are exposed via this structure */
 451 struct winbindd_methods passdb_methods = {
 452         False,
 453         query_user_list,
 454         enum_dom_groups,
 455         enum_local_groups,
 456         name_to_sid,
 457         sid_to_name,
 458         rids_to_names,
 459         query_user,
 460         lookup_usergroups,
 461         lookup_useraliases,
 462         lookup_groupmem,
 463         sequence_number,
 464         lockout_policy,
 465         password_policy,
 466         trusted_domains,
 467 };