source/winbindd/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_dbg(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             !sid_check_is_in_wellknown_domain(sid))
 145         {
 146                 DEBUG(0, ("Possible deadlock: Trying to lookup SID %s with "
 147                           "passdb backend\n", sid_string_dbg(sid)));
 148                 return NT_STATUS_NONE_MAPPED;
 149         }
 150
 151         if (!lookup_sid(mem_ctx, sid, &dom, &nam, type)) {
 152                 return NT_STATUS_NONE_MAPPED;
 153         }
 154
 155         *domain_name = talloc_strdup(mem_ctx, dom);
 156         *name = talloc_strdup(mem_ctx, nam);
 157
 158         return NT_STATUS_OK;
 159 }
 160
 161 static NTSTATUS rids_to_names(struct winbindd_domain *domain,
 162                               TALLOC_CTX *mem_ctx,
 163                               const DOM_SID *sid,
 164                               uint32 *rids,
 165                               size_t num_rids,
 166                               char **domain_name,
 167                               char ***names,
 168                               enum lsa_SidType **types)
 169 {
 170         return NT_STATUS_UNSUCCESSFUL;
 171 }
 172
 173 /* Lookup user information from a rid or username. */
 174 static NTSTATUS query_user(struct winbindd_domain *domain,
 175                            TALLOC_CTX *mem_ctx,
 176                            const DOM_SID *user_sid,
 177                            WINBIND_USERINFO *user_info)
 178 {
 179         return NT_STATUS_NO_SUCH_USER;
 180 }
 181
 182 /* Lookup groups a user is a member of.  I wish Unix had a call like this! */
 183 static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
 184                                   TALLOC_CTX *mem_ctx,
 185                                   const DOM_SID *user_sid,
 186                                   uint32 *num_groups, DOM_SID **user_gids)
 187 {
 188         NTSTATUS result;
 189         DOM_SID *groups = NULL;
 190         gid_t *gids = NULL;
 191         size_t ngroups = 0;
 192         struct samu *user;
 193
 194         if ( (user = samu_new(mem_ctx)) == NULL ) {
 195                 return NT_STATUS_NO_MEMORY;
 196         }
 197
 198         if ( !pdb_getsampwsid( user, user_sid ) ) {
 199                 return NT_STATUS_NO_SUCH_USER;
 200         }
 201
 202         result = pdb_enum_group_memberships( mem_ctx, user, &groups, &gids, &ngroups );
 203
 204         TALLOC_FREE( user );
 205
 206         *num_groups = (uint32)ngroups;
 207         *user_gids = groups;
 208
 209         return result;
 210 }
 211
 212 static NTSTATUS lookup_useraliases(struct winbindd_domain *domain,
 213                                    TALLOC_CTX *mem_ctx,
 214                                    uint32 num_sids, const DOM_SID *sids,
 215                                    uint32 *p_num_aliases, uint32 **rids)
 216 {
 217         NTSTATUS result;
 218         size_t num_aliases = 0;
 219
 220         result = pdb_enum_alias_memberships(mem_ctx, &domain->sid,
 221                                             sids, num_sids, rids, &num_aliases);
 222
 223         *p_num_aliases = num_aliases;
 224         return result;
 225 }
 226
 227 /* Lookup group membership given a rid.   */
 228 static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
 229                                 TALLOC_CTX *mem_ctx,
 230                                 const DOM_SID *group_sid, uint32 *num_names,
 231                                 DOM_SID **sid_mem, char ***names,
 232                                 uint32 **name_types)
 233 {
 234         size_t i, num_members, num_mapped;
 235         uint32 *rids;
 236         NTSTATUS result;
 237         const DOM_SID **sids;
 238         struct lsa_dom_info *lsa_domains;
 239         struct lsa_name_info *lsa_names;
 240         TALLOC_CTX *tmp_ctx;
 241
 242         if (!sid_check_is_in_our_domain(group_sid)) {
 243                 /* There's no groups, only aliases in BUILTIN */
 244                 return NT_STATUS_NO_SUCH_GROUP;
 245         }
 246
 247         if (!(tmp_ctx = talloc_init("lookup_groupmem"))) {
 248                 return NT_STATUS_NO_MEMORY;
 249         }
 250
 251         result = pdb_enum_group_members(tmp_ctx, group_sid, &rids,
 252                                         &num_members);
 253         if (!NT_STATUS_IS_OK(result)) {
 254                 TALLOC_FREE(tmp_ctx);
 255                 return result;
 256         }
 257
 258         if (num_members == 0) {
 259                 *num_names = 0;
 260                 *sid_mem = NULL;
 261                 *names = NULL;
 262                 *name_types = NULL;
 263                 TALLOC_FREE(tmp_ctx);
 264                 return NT_STATUS_OK;
 265         }
 266
 267         *sid_mem = TALLOC_ARRAY(mem_ctx, DOM_SID, num_members);
 268         *names = TALLOC_ARRAY(mem_ctx, char *, num_members);
 269         *name_types = TALLOC_ARRAY(mem_ctx, uint32, num_members);
 270         sids = TALLOC_ARRAY(tmp_ctx, const DOM_SID *, num_members);
 271
 272         if (((*sid_mem) == NULL) || ((*names) == NULL) ||
 273             ((*name_types) == NULL) || (sids == NULL)) {
 274                 TALLOC_FREE(tmp_ctx);
 275                 return NT_STATUS_NO_MEMORY;
 276         }
 277
 278         /*
 279          * Prepare an array of sid pointers for the lookup_sids calling
 280          * convention.
 281          */
 282
 283         for (i=0; i<num_members; i++) {
 284                 DOM_SID *sid = &((*sid_mem)[i]);
 285                 if (!sid_compose(sid, &domain->sid, rids[i])) {
 286                         TALLOC_FREE(tmp_ctx);
 287                         return NT_STATUS_INTERNAL_ERROR;
 288                 }
 289                 sids[i] = sid;
 290         }
 291
 292         result = lookup_sids(tmp_ctx, num_members, sids, 1,
 293                              &lsa_domains, &lsa_names);
 294         if (!NT_STATUS_IS_OK(result)) {
 295                 TALLOC_FREE(tmp_ctx);
 296                 return result;
 297         }
 298
 299         num_mapped = 0;
 300         for (i=0; i<num_members; i++) {
 301                 if (lsa_names[i].type != SID_NAME_USER) {
 302                         DEBUG(2, ("Got %s as group member -- ignoring\n",
 303                                   sid_type_lookup(lsa_names[i].type)));
 304                         continue;
 305                 }
 306                 if (!((*names)[i] = talloc_strdup((*names),
 307                                                   lsa_names[i].name))) {
 308                         TALLOC_FREE(tmp_ctx);
 309                         return NT_STATUS_NO_MEMORY;
 310                 }
 311
 312                 (*name_types)[i] = lsa_names[i].type;
 313
 314                 num_mapped += 1;
 315         }
 316
 317         *num_names = num_mapped;
 318
 319         TALLOC_FREE(tmp_ctx);
 320         return NT_STATUS_OK;
 321 }
 322
 323 /* find the sequence number for a domain */
 324 static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
 325 {
 326         bool result;
 327         time_t seq_num;
 328
 329         result = pdb_get_seq_num(&seq_num);
 330         if (!result) {
 331                 *seq = 1;
 332         }
 333
 334         *seq = (int) seq_num;
 335         /* *seq = 1; */
 336         return NT_STATUS_OK;
 337 }
 338
 339 static NTSTATUS lockout_policy(struct winbindd_domain *domain,
 340                                TALLOC_CTX *mem_ctx,
 341                                struct samr_DomInfo12 *policy)
 342 {
 343         /* actually we have that */
 344         return NT_STATUS_NOT_IMPLEMENTED;
 345 }
 346
 347 static NTSTATUS password_policy(struct winbindd_domain *domain,
 348                                 TALLOC_CTX *mem_ctx,
 349                                 struct samr_DomInfo1 *policy)
 350 {
 351         uint32 min_pass_len,pass_hist,password_properties;
 352         time_t u_expire, u_min_age;
 353         NTTIME nt_expire, nt_min_age;
 354         uint32 account_policy_temp;
 355
 356         if ((policy = TALLOC_ZERO_P(mem_ctx, struct samr_DomInfo1)) == NULL) {
 357                 return NT_STATUS_NO_MEMORY;
 358         }
 359
 360         if (!pdb_get_account_policy(AP_MIN_PASSWORD_LEN, &account_policy_temp)) {
 361                 return NT_STATUS_ACCESS_DENIED;
 362         }
 363         min_pass_len = account_policy_temp;
 364
 365         if (!pdb_get_account_policy(AP_PASSWORD_HISTORY, &account_policy_temp)) {
 366                 return NT_STATUS_ACCESS_DENIED;
 367         }
 368         pass_hist = account_policy_temp;
 369
 370         if (!pdb_get_account_policy(AP_USER_MUST_LOGON_TO_CHG_PASS, &account_policy_temp)) {
 371                 return NT_STATUS_ACCESS_DENIED;
 372         }
 373         password_properties = account_policy_temp;
 374
 375         if (!pdb_get_account_policy(AP_MAX_PASSWORD_AGE, &account_policy_temp)) {
 376                 return NT_STATUS_ACCESS_DENIED;
 377         }
 378         u_expire = account_policy_temp;
 379
 380         if (!pdb_get_account_policy(AP_MIN_PASSWORD_AGE, &account_policy_temp)) {
 381                 return NT_STATUS_ACCESS_DENIED;
 382         }
 383         u_min_age = account_policy_temp;
 384
 385         unix_to_nt_time_abs(&nt_expire, u_expire);
 386         unix_to_nt_time_abs(&nt_min_age, u_min_age);
 387
 388         init_samr_DomInfo1(policy,
 389                            (uint16)min_pass_len,
 390                            (uint16)pass_hist,
 391                            password_properties,
 392                            nt_expire,
 393                            nt_min_age);
 394
 395         return NT_STATUS_OK;
 396 }
 397
 398 /* get a list of trusted domains */
 399 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
 400                                 TALLOC_CTX *mem_ctx,
 401                                 uint32 *num_domains,
 402                                 char ***names,
 403                                 char ***alt_names,
 404                                 DOM_SID **dom_sids)
 405 {
 406         NTSTATUS nt_status;
 407         struct trustdom_info **domains;
 408         int i;
 409         TALLOC_CTX *tmp_ctx;
 410
 411         *num_domains = 0;
 412         *names = NULL;
 413         *alt_names = NULL;
 414         *dom_sids = NULL;
 415
 416         if (!(tmp_ctx = talloc_init("trusted_domains"))) {
 417                 return NT_STATUS_NO_MEMORY;
 418         }
 419
 420         nt_status = pdb_enum_trusteddoms(tmp_ctx, num_domains, &domains);
 421         if (!NT_STATUS_IS_OK(nt_status)) {
 422                 TALLOC_FREE(tmp_ctx);
 423                 return nt_status;
 424         }
 425
 426         if (*num_domains) {
 427                 *names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 428                 *alt_names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 429                 *dom_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_domains);
 430
 431                 if ((*alt_names == NULL) || (*names == NULL) || (*dom_sids == NULL)) {
 432                         TALLOC_FREE(tmp_ctx);
 433                         return NT_STATUS_NO_MEMORY;
 434                 }
 435         } else {
 436                 *names = NULL;
 437                 *alt_names = NULL;
 438                 *dom_sids = NULL;
 439         }
 440
 441         for (i=0; i<*num_domains; i++) {
 442                 (*alt_names)[i] = NULL;
 443                 if (!((*names)[i] = talloc_strdup((*names),
 444                                                   domains[i]->name))) {
 445                         TALLOC_FREE(tmp_ctx);
 446                         return NT_STATUS_NO_MEMORY;
 447                 }
 448                 sid_copy(&(*dom_sids)[i], &domains[i]->sid);
 449         }
 450
 451         TALLOC_FREE(tmp_ctx);
 452         return NT_STATUS_OK;
 453 }
 454
 455 /* the rpc backend methods are exposed via this structure */
 456 struct winbindd_methods passdb_methods = {
 457         False,
 458         query_user_list,
 459         enum_dom_groups,
 460         enum_local_groups,
 461         name_to_sid,
 462         sid_to_name,
 463         rids_to_names,
 464         query_user,
 465         lookup_usergroups,
 466         lookup_useraliases,
 467         lookup_groupmem,
 468         sequence_number,
 469         lockout_policy,
 470         password_policy,
 471         trusted_domains,
 472 };