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                             enum winbindd_cmd original_cmd,
  97                             const char *domain_name,
  98                             const char *name,
  99                             DOM_SID *sid,
 100                             enum lsa_SidType *type)
 101 {
 102         uint32 flags = LOOKUP_NAME_ALL;
 103
 104         switch ( original_cmd ) {
 105         case WINBINDD_LOOKUPNAME:
 106                 /* This call is ok */
 107                 break;
 108         default:
 109                 /* Avoid any NSS calls in the lookup_name by default */
 110                 flags |= LOOKUP_NAME_EXPLICIT;
 111                 DEBUG(10,("winbindd_passdb: limiting name_to_sid() to explicit mappings\n"));
 112                 break;
 113         }
 114
 115         DEBUG(10, ("Finding name %s\n", name));
 116
 117         if ( !lookup_name( mem_ctx, name, flags, NULL, NULL, sid, type ) ) {
 118                 return NT_STATUS_NONE_MAPPED;
 119         }
 120
 121         return NT_STATUS_OK;
 122 }
 123
 124 /*
 125   convert a domain SID to a user or group name
 126 */
 127 static NTSTATUS sid_to_name(struct winbindd_domain *domain,
 128                             TALLOC_CTX *mem_ctx,
 129                             const DOM_SID *sid,
 130                             char **domain_name,
 131                             char **name,
 132                             enum lsa_SidType *type)
 133 {
 134         const char *dom, *nam;
 135
 136         DEBUG(10, ("Converting SID %s\n", sid_string_static(sid)));
 137
 138         /* Paranoia check */
 139         if (!sid_check_is_in_builtin(sid) &&
 140             !sid_check_is_in_our_domain(sid) &&
 141             !sid_check_is_in_unix_users(sid) &&
 142             !sid_check_is_unix_users(sid) &&
 143             !sid_check_is_in_unix_groups(sid) &&
 144             !sid_check_is_unix_groups(sid) )
 145         {
 146                 DEBUG(0, ("Possible deadlock: Trying to lookup SID %s with "
 147                           "passdb backend\n", sid_string_static(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                                SAM_UNK_INFO_12 *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                                 SAM_UNK_INFO_1 *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, SAM_UNK_INFO_1)) == 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_unk_info1(policy, (uint16)min_pass_len, (uint16)pass_hist,
 389                        password_properties, nt_expire, nt_min_age);
 390
 391         return NT_STATUS_OK;
 392 }
 393
 394 /* get a list of trusted domains */
 395 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
 396                                 TALLOC_CTX *mem_ctx,
 397                                 uint32 *num_domains,
 398                                 char ***names,
 399                                 char ***alt_names,
 400                                 DOM_SID **dom_sids)
 401 {
 402         NTSTATUS nt_status;
 403         struct trustdom_info **domains;
 404         int i;
 405         TALLOC_CTX *tmp_ctx;
 406
 407         *num_domains = 0;
 408         *names = NULL;
 409         *alt_names = NULL;
 410         *dom_sids = NULL;
 411
 412         if (!(tmp_ctx = talloc_init("trusted_domains"))) {
 413                 return NT_STATUS_NO_MEMORY;
 414         }
 415
 416         nt_status = pdb_enum_trusteddoms(tmp_ctx, num_domains, &domains);
 417         if (!NT_STATUS_IS_OK(nt_status)) {
 418                 TALLOC_FREE(tmp_ctx);
 419                 return nt_status;
 420         }
 421
 422         if (*num_domains) {
 423                 *names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 424                 *alt_names = TALLOC_ARRAY(mem_ctx, char *, *num_domains);
 425                 *dom_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *num_domains);
 426
 427                 if ((*alt_names == NULL) || (*names == NULL) || (*dom_sids == NULL)) {
 428                         TALLOC_FREE(tmp_ctx);
 429                         return NT_STATUS_NO_MEMORY;
 430                 }
 431         } else {
 432                 *names = NULL;
 433                 *alt_names = NULL;
 434                 *dom_sids = NULL;
 435         }
 436
 437         for (i=0; i<*num_domains; i++) {
 438                 (*alt_names)[i] = NULL;
 439                 if (!((*names)[i] = talloc_strdup((*names),
 440                                                   domains[i]->name))) {
 441                         TALLOC_FREE(tmp_ctx);
 442                         return NT_STATUS_NO_MEMORY;
 443                 }
 444                 sid_copy(&(*dom_sids)[i], &domains[i]->sid);
 445         }
 446
 447         TALLOC_FREE(tmp_ctx);
 448         return NT_STATUS_OK;
 449 }
 450
 451 /* the rpc backend methods are exposed via this structure */
 452 struct winbindd_methods passdb_methods = {
 453         False,
 454         query_user_list,
 455         enum_dom_groups,
 456         enum_local_groups,
 457         name_to_sid,
 458         sid_to_name,
 459         rids_to_names,
 460         query_user,
 461         lookup_usergroups,
 462         lookup_useraliases,
 463         lookup_groupmem,
 464         sequence_number,
 465         lockout_policy,
 466         password_policy,
 467         trusted_domains,
 468 };