source3/passdb/pdb_interface.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Bartlett                        2002
   5    Copyright (C) Jelmer Vernooij                        2002
   6    Copyright (C) Simo Sorce                             2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_PASSDB
  27
  28 static struct pdb_init_function_entry *backends = NULL;
  29
  30 static void lazy_initialize_passdb(void)
  31 {
  32         static BOOL initialized = False;
  33         if(initialized)return;
  34         static_init_pdb;
  35         initialized = True;
  36 }
  37
  38 static struct pdb_init_function_entry *pdb_find_backend_entry(const char *name);
  39
  40 /*******************************************************************
  41  Clean up uninitialised passwords.  The only way to tell
  42  that these values are not 'real' is that they do not
  43  have a valid last set time.  Instead, the value is fixed at 0.
  44  Therefore we use that as the key for 'is this a valid password'.
  45  However, it is perfectly valid to have a 'default' last change
  46  time, such LDAP with a missing attribute would produce.
  47 ********************************************************************/
  48
  49 static void pdb_force_pw_initialization(SAM_ACCOUNT *pass)
  50 {
  51         const uint8 *lm_pwd, *nt_pwd;
  52
  53         /* only reset a password if the last set time has been
  54            explicitly been set to zero.  A default last set time
  55            is ignored */
  56
  57         if ( (pdb_get_init_flags(pass, PDB_PASSLASTSET) != PDB_DEFAULT)
  58                 && (pdb_get_pass_last_set_time(pass) == 0) )
  59         {
  60
  61                 if (pdb_get_init_flags(pass, PDB_LMPASSWD) != PDB_DEFAULT)
  62                 {
  63                         lm_pwd = pdb_get_lanman_passwd(pass);
  64                         if (lm_pwd)
  65                                 pdb_set_lanman_passwd(pass, NULL, PDB_CHANGED);
  66                 }
  67                 if (pdb_get_init_flags(pass, PDB_NTPASSWD) != PDB_DEFAULT)
  68                 {
  69                         nt_pwd = pdb_get_nt_passwd(pass);
  70                         if (nt_pwd)
  71                                 pdb_set_nt_passwd(pass, NULL, PDB_CHANGED);
  72                 }
  73         }
  74
  75         return;
  76 }
  77
  78 NTSTATUS smb_register_passdb(int version, const char *name, pdb_init_function init)
  79 {
  80         struct pdb_init_function_entry *entry = backends;
  81
  82         if(version != PASSDB_INTERFACE_VERSION) {
  83                 DEBUG(0,("Can't register passdb backend!\n"
  84                          "You tried to register a passdb module with PASSDB_INTERFACE_VERSION %d, "
  85                          "while this version of samba uses version %d\n",
  86                          version,PASSDB_INTERFACE_VERSION));
  87                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
  88         }
  89
  90         if (!name || !init) {
  91                 return NT_STATUS_INVALID_PARAMETER;
  92         }
  93
  94         DEBUG(5,("Attempting to register passdb backend %s\n", name));
  95
  96         /* Check for duplicates */
  97         if (pdb_find_backend_entry(name)) {
  98                 DEBUG(0,("There already is a passdb backend registered with the name %s!\n", name));
  99                 return NT_STATUS_OBJECT_NAME_COLLISION;
 100         }
 101
 102         entry = SMB_XMALLOC_P(struct pdb_init_function_entry);
 103         entry->name = smb_xstrdup(name);
 104         entry->init = init;
 105
 106         DLIST_ADD(backends, entry);
 107         DEBUG(5,("Successfully added passdb backend '%s'\n", name));
 108         return NT_STATUS_OK;
 109 }
 110
 111 static struct pdb_init_function_entry *pdb_find_backend_entry(const char *name)
 112 {
 113         struct pdb_init_function_entry *entry = backends;
 114
 115         while(entry) {
 116                 if (strcmp(entry->name, name)==0) return entry;
 117                 entry = entry->next;
 118         }
 119
 120         return NULL;
 121 }
 122
 123 static NTSTATUS context_setsampwent(struct pdb_context *context, BOOL update, uint16 acb_mask)
 124 {
 125         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 126
 127         if (!context) {
 128                 DEBUG(0, ("invalid pdb_context specified!\n"));
 129                 return ret;
 130         }
 131
 132         context->pwent_methods = context->pdb_methods;
 133
 134         if (!context->pwent_methods) {
 135                 /* No passdbs at all */
 136                 return ret;
 137         }
 138
 139         while (NT_STATUS_IS_ERR(ret = context->pwent_methods->setsampwent(context->pwent_methods, update, acb_mask))) {
 140                 context->pwent_methods = context->pwent_methods->next;
 141                 if (context->pwent_methods == NULL)
 142                         return NT_STATUS_UNSUCCESSFUL;
 143         }
 144         return ret;
 145 }
 146
 147 static void context_endsampwent(struct pdb_context *context)
 148 {
 149         if ((!context)){
 150                 DEBUG(0, ("invalid pdb_context specified!\n"));
 151                 return;
 152         }
 153
 154         if (context->pwent_methods && context->pwent_methods->endsampwent)
 155                 context->pwent_methods->endsampwent(context->pwent_methods);
 156
 157         /* So we won't get strange data when calling getsampwent now */
 158         context->pwent_methods = NULL;
 159 }
 160
 161 static NTSTATUS context_getsampwent(struct pdb_context *context, SAM_ACCOUNT *user)
 162 {
 163         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 164
 165         if ((!context) || (!context->pwent_methods)) {
 166                 DEBUG(0, ("invalid pdb_context specified!\n"));
 167                 return ret;
 168         }
 169         /* Loop until we find something useful */
 170         while (NT_STATUS_IS_ERR(ret = context->pwent_methods->getsampwent(context->pwent_methods, user))) {
 171
 172                 context->pwent_methods->endsampwent(context->pwent_methods);
 173
 174                 context->pwent_methods = context->pwent_methods->next;
 175
 176                 /* All methods are checked now. There are no more entries */
 177                 if (context->pwent_methods == NULL)
 178                         return ret;
 179
 180                 context->pwent_methods->setsampwent(context->pwent_methods, False, 0);
 181         }
 182         user->methods = context->pwent_methods;
 183         pdb_force_pw_initialization(user);
 184         return ret;
 185 }
 186
 187 static NTSTATUS context_getsampwnam(struct pdb_context *context, SAM_ACCOUNT *sam_acct, const char *username)
 188 {
 189         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 190
 191         struct pdb_methods *curmethods;
 192         if ((!context)) {
 193                 DEBUG(0, ("invalid pdb_context specified!\n"));
 194                 return ret;
 195         }
 196         curmethods = context->pdb_methods;
 197         while (curmethods){
 198                 if (NT_STATUS_IS_OK(ret = curmethods->getsampwnam(curmethods, sam_acct, username))) {
 199                         pdb_force_pw_initialization(sam_acct);
 200                         sam_acct->methods = curmethods;
 201                         return ret;
 202                 }
 203                 curmethods = curmethods->next;
 204         }
 205
 206         return ret;
 207 }
 208
 209 static NTSTATUS context_getsampwsid(struct pdb_context *context, SAM_ACCOUNT *sam_acct, const DOM_SID *sid)
 210 {
 211         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 212
 213         struct pdb_methods *curmethods;
 214         if ((!context)) {
 215                 DEBUG(0, ("invalid pdb_context specified!\n"));
 216                 return ret;
 217         }
 218
 219         curmethods = context->pdb_methods;
 220
 221         while (curmethods){
 222                 if (NT_STATUS_IS_OK(ret = curmethods->getsampwsid(curmethods, sam_acct, sid))) {
 223                         pdb_force_pw_initialization(sam_acct);
 224                         sam_acct->methods = curmethods;
 225                         return ret;
 226                 }
 227                 curmethods = curmethods->next;
 228         }
 229
 230         return ret;
 231 }
 232
 233 static NTSTATUS context_add_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 234 {
 235         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 236         const uint8 *lm_pw, *nt_pw;
 237         uint16 acb_flags;
 238
 239         if ((!context) || (!context->pdb_methods)) {
 240                 DEBUG(0, ("invalid pdb_context specified!\n"));
 241                 return ret;
 242         }
 243
 244         /* disable acccounts with no passwords (that has not
 245            been allowed by the  ACB_PWNOTREQ bit */
 246
 247         lm_pw = pdb_get_lanman_passwd( sam_acct );
 248         nt_pw = pdb_get_nt_passwd( sam_acct );
 249         acb_flags = pdb_get_acct_ctrl( sam_acct );
 250         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 251                 acb_flags |= ACB_DISABLED;
 252                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 253         }
 254
 255         /** @todo  This is where a 're-read on add' should be done */
 256         /* We now add a new account to the first database listed.
 257          * Should we? */
 258
 259         return context->pdb_methods->add_sam_account(context->pdb_methods, sam_acct);
 260 }
 261
 262 static NTSTATUS context_update_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 263 {
 264         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 265         const uint8 *lm_pw, *nt_pw;
 266         uint16 acb_flags;
 267
 268         if (!context) {
 269                 DEBUG(0, ("invalid pdb_context specified!\n"));
 270                 return ret;
 271         }
 272
 273         if (!sam_acct || !sam_acct->methods){
 274                 DEBUG(0, ("invalid sam_acct specified\n"));
 275                 return ret;
 276         }
 277
 278         /* disable acccounts with no passwords (that has not
 279            been allowed by the  ACB_PWNOTREQ bit */
 280
 281         lm_pw = pdb_get_lanman_passwd( sam_acct );
 282         nt_pw = pdb_get_nt_passwd( sam_acct );
 283         acb_flags = pdb_get_acct_ctrl( sam_acct );
 284         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 285                 acb_flags |= ACB_DISABLED;
 286                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 287         }
 288
 289         /** @todo  This is where a 're-read on update' should be done */
 290
 291         return sam_acct->methods->update_sam_account(sam_acct->methods, sam_acct);
 292 }
 293
 294 static NTSTATUS context_delete_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 295 {
 296         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 297
 298         struct pdb_methods *pdb_selected;
 299         if (!context) {
 300                 DEBUG(0, ("invalid pdb_context specified!\n"));
 301                 return ret;
 302         }
 303
 304         if (!sam_acct->methods){
 305                 pdb_selected = context->pdb_methods;
 306                 /* There's no passdb backend specified for this account.
 307                  * Try to delete it in every passdb available
 308                  * Needed to delete accounts in smbpasswd that are not
 309                  * in /etc/passwd.
 310                  */
 311                 while (pdb_selected){
 312                         if (NT_STATUS_IS_OK(ret = pdb_selected->delete_sam_account(pdb_selected, sam_acct))) {
 313                                 return ret;
 314                         }
 315                         pdb_selected = pdb_selected->next;
 316                 }
 317                 return ret;
 318         }
 319
 320         if (!sam_acct->methods->delete_sam_account){
 321                 DEBUG(0,("invalid sam_acct->methods->delete_sam_account\n"));
 322                 return ret;
 323         }
 324
 325         return sam_acct->methods->delete_sam_account(sam_acct->methods, sam_acct);
 326 }
 327
 328 static NTSTATUS context_update_login_attempts(struct pdb_context *context,
 329                                                 SAM_ACCOUNT *sam_acct, BOOL success)
 330 {
 331         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 332
 333         if (!context) {
 334                 DEBUG(0, ("invalid pdb_context specified!\n"));
 335                 return ret;
 336         }
 337
 338         if (!sam_acct || !sam_acct->methods){
 339                 DEBUG(0, ("invalid sam_acct specified\n"));
 340                 return ret;
 341         }
 342
 343         return sam_acct->methods->update_login_attempts(sam_acct->methods, sam_acct, success);
 344 }
 345
 346 static NTSTATUS context_getgrsid(struct pdb_context *context,
 347                                  GROUP_MAP *map, DOM_SID sid)
 348 {
 349         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 350
 351         struct pdb_methods *curmethods;
 352         if ((!context)) {
 353                 DEBUG(0, ("invalid pdb_context specified!\n"));
 354                 return ret;
 355         }
 356         curmethods = context->pdb_methods;
 357         while (curmethods){
 358                 ret = curmethods->getgrsid(curmethods, map, sid);
 359                 if (NT_STATUS_IS_OK(ret)) {
 360                         map->methods = curmethods;
 361                         return ret;
 362                 }
 363                 curmethods = curmethods->next;
 364         }
 365
 366         return ret;
 367 }
 368
 369 static NTSTATUS context_getgrgid(struct pdb_context *context,
 370                                  GROUP_MAP *map, gid_t gid)
 371 {
 372         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 373
 374         struct pdb_methods *curmethods;
 375         if ((!context)) {
 376                 DEBUG(0, ("invalid pdb_context specified!\n"));
 377                 return ret;
 378         }
 379         curmethods = context->pdb_methods;
 380         while (curmethods){
 381                 ret = curmethods->getgrgid(curmethods, map, gid);
 382                 if (NT_STATUS_IS_OK(ret)) {
 383                         map->methods = curmethods;
 384                         return ret;
 385                 }
 386                 curmethods = curmethods->next;
 387         }
 388
 389         return ret;
 390 }
 391
 392 static NTSTATUS context_getgrnam(struct pdb_context *context,
 393                                  GROUP_MAP *map, const char *name)
 394 {
 395         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 396
 397         struct pdb_methods *curmethods;
 398         if ((!context)) {
 399                 DEBUG(0, ("invalid pdb_context specified!\n"));
 400                 return ret;
 401         }
 402         curmethods = context->pdb_methods;
 403         while (curmethods){
 404                 ret = curmethods->getgrnam(curmethods, map, name);
 405                 if (NT_STATUS_IS_OK(ret)) {
 406                         map->methods = curmethods;
 407                         return ret;
 408                 }
 409                 curmethods = curmethods->next;
 410         }
 411
 412         return ret;
 413 }
 414
 415 static NTSTATUS context_add_group_mapping_entry(struct pdb_context *context,
 416                                                 GROUP_MAP *map)
 417 {
 418         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 419
 420         if ((!context) || (!context->pdb_methods)) {
 421                 DEBUG(0, ("invalid pdb_context specified!\n"));
 422                 return ret;
 423         }
 424
 425         return context->pdb_methods->add_group_mapping_entry(context->pdb_methods,
 426                                                              map);
 427 }
 428
 429 static NTSTATUS context_update_group_mapping_entry(struct pdb_context *context,
 430                                                    GROUP_MAP *map)
 431 {
 432         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 433
 434         if ((!context) || (!context->pdb_methods)) {
 435                 DEBUG(0, ("invalid pdb_context specified!\n"));
 436                 return ret;
 437         }
 438
 439         return context->
 440                 pdb_methods->update_group_mapping_entry(context->pdb_methods, map);
 441 }
 442
 443 static NTSTATUS context_delete_group_mapping_entry(struct pdb_context *context,
 444                                                    DOM_SID sid)
 445 {
 446         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 447
 448         if ((!context) || (!context->pdb_methods)) {
 449                 DEBUG(0, ("invalid pdb_context specified!\n"));
 450                 return ret;
 451         }
 452
 453         return context->
 454                 pdb_methods->delete_group_mapping_entry(context->pdb_methods, sid);
 455 }
 456
 457 static NTSTATUS context_enum_group_mapping(struct pdb_context *context,
 458                                            enum SID_NAME_USE sid_name_use,
 459                                            GROUP_MAP **rmap, int *num_entries,
 460                                            BOOL unix_only)
 461 {
 462         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 463
 464         if ((!context) || (!context->pdb_methods)) {
 465                 DEBUG(0, ("invalid pdb_context specified!\n"));
 466                 return ret;
 467         }
 468
 469         return context->pdb_methods->enum_group_mapping(context->pdb_methods,
 470                                                         sid_name_use, rmap,
 471                                                         num_entries, unix_only);
 472 }
 473
 474 static NTSTATUS context_enum_group_members(struct pdb_context *context,
 475                                            TALLOC_CTX *mem_ctx,
 476                                            const DOM_SID *group,
 477                                            uint32 **member_rids,
 478                                            int *num_members)
 479 {
 480         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 481
 482         if ((!context) || (!context->pdb_methods)) {
 483                 DEBUG(0, ("invalid pdb_context specified!\n"));
 484                 return ret;
 485         }
 486
 487         return context->pdb_methods->enum_group_members(context->pdb_methods,
 488                                                         mem_ctx, group,
 489                                                         member_rids,
 490                                                         num_members);
 491 }
 492
 493 static NTSTATUS context_enum_group_memberships(struct pdb_context *context,
 494                                                const char *username,
 495                                                gid_t primary_gid,
 496                                                DOM_SID **sids, gid_t **gids,
 497                                                int *num_groups)
 498 {
 499         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 500
 501         if ((!context) || (!context->pdb_methods)) {
 502                 DEBUG(0, ("invalid pdb_context specified!\n"));
 503                 return ret;
 504         }
 505
 506         return context->pdb_methods->
 507                 enum_group_memberships(context->pdb_methods, username,
 508                                        primary_gid, sids, gids, num_groups);
 509 }
 510
 511 static NTSTATUS context_find_alias(struct pdb_context *context,
 512                                    const char *name, DOM_SID *sid)
 513 {
 514         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 515
 516         if ((!context) || (!context->pdb_methods)) {
 517                 DEBUG(0, ("invalid pdb_context specified!\n"));
 518                 return ret;
 519         }
 520
 521         return context->pdb_methods->find_alias(context->pdb_methods,
 522                                                 name, sid);
 523 }
 524
 525 static NTSTATUS context_create_alias(struct pdb_context *context,
 526                                      const char *name, uint32 *rid)
 527 {
 528         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 529
 530         if ((!context) || (!context->pdb_methods)) {
 531                 DEBUG(0, ("invalid pdb_context specified!\n"));
 532                 return ret;
 533         }
 534
 535         return context->pdb_methods->create_alias(context->pdb_methods,
 536                                                   name, rid);
 537 }
 538
 539 static NTSTATUS context_delete_alias(struct pdb_context *context,
 540                                      const DOM_SID *sid)
 541 {
 542         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 543
 544         if ((!context) || (!context->pdb_methods)) {
 545                 DEBUG(0, ("invalid pdb_context specified!\n"));
 546                 return ret;
 547         }
 548
 549         return context->pdb_methods->delete_alias(context->pdb_methods, sid);
 550 }
 551
 552 static NTSTATUS context_get_aliasinfo(struct pdb_context *context,
 553                                       const DOM_SID *sid,
 554                                       struct acct_info *info)
 555 {
 556         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 557
 558         if ((!context) || (!context->pdb_methods)) {
 559                 DEBUG(0, ("invalid pdb_context specified!\n"));
 560                 return ret;
 561         }
 562
 563         return context->pdb_methods->get_aliasinfo(context->pdb_methods,
 564                                                    sid, info);
 565 }
 566
 567 static NTSTATUS context_set_aliasinfo(struct pdb_context *context,
 568                                       const DOM_SID *sid,
 569                                       struct acct_info *info)
 570 {
 571         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 572
 573         if ((!context) || (!context->pdb_methods)) {
 574                 DEBUG(0, ("invalid pdb_context specified!\n"));
 575                 return ret;
 576         }
 577
 578         return context->pdb_methods->set_aliasinfo(context->pdb_methods,
 579                                                    sid, info);
 580 }
 581
 582 static NTSTATUS context_add_aliasmem(struct pdb_context *context,
 583                                      const DOM_SID *alias,
 584                                      const DOM_SID *member)
 585 {
 586         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 587
 588         if ((!context) || (!context->pdb_methods)) {
 589                 DEBUG(0, ("invalid pdb_context specified!\n"));
 590                 return ret;
 591         }
 592
 593         return context->pdb_methods->add_aliasmem(context->pdb_methods,
 594                                                   alias, member);
 595 }
 596
 597 static NTSTATUS context_del_aliasmem(struct pdb_context *context,
 598                                      const DOM_SID *alias,
 599                                      const DOM_SID *member)
 600 {
 601         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 602
 603         if ((!context) || (!context->pdb_methods)) {
 604                 DEBUG(0, ("invalid pdb_context specified!\n"));
 605                 return ret;
 606         }
 607
 608         return context->pdb_methods->del_aliasmem(context->pdb_methods,
 609                                                   alias, member);
 610 }
 611
 612 static NTSTATUS context_enum_aliasmem(struct pdb_context *context,
 613                                       const DOM_SID *alias, DOM_SID **members,
 614                                       int *num)
 615 {
 616         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 617
 618         if ((!context) || (!context->pdb_methods)) {
 619                 DEBUG(0, ("invalid pdb_context specified!\n"));
 620                 return ret;
 621         }
 622
 623         return context->pdb_methods->enum_aliasmem(context->pdb_methods,
 624                                                    alias, members, num);
 625 }
 626
 627 static NTSTATUS context_enum_alias_memberships(struct pdb_context *context,
 628                                                TALLOC_CTX *mem_ctx,
 629                                                const DOM_SID *domain_sid,
 630                                                const DOM_SID *members,
 631                                                int num_members,
 632                                                uint32 **alias_rids,
 633                                                int *num_alias_rids)
 634 {
 635         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 636
 637         if ((!context) || (!context->pdb_methods)) {
 638                 DEBUG(0, ("invalid pdb_context specified!\n"));
 639                 return ret;
 640         }
 641
 642         return context->pdb_methods->
 643                 enum_alias_memberships(context->pdb_methods, mem_ctx,
 644                                        domain_sid, members, num_members,
 645                                        alias_rids, num_alias_rids);
 646 }
 647
 648 static NTSTATUS context_lookup_rids(struct pdb_context *context,
 649                                     TALLOC_CTX *mem_ctx,
 650                                     const DOM_SID *domain_sid,
 651                                     int num_rids,
 652                                     uint32 *rids,
 653                                     const char ***names,
 654                                     uint32 **attrs)
 655 {
 656         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 657
 658         if ((!context) || (!context->pdb_methods)) {
 659                 DEBUG(0, ("invalid pdb_context specified!\n"));
 660                 return ret;
 661         }
 662
 663         return context->pdb_methods->lookup_rids(context->pdb_methods,
 664                                                  mem_ctx, domain_sid, num_rids,
 665                                                  rids, names, attrs);
 666 }
 667
 668 static BOOL context_search_users(struct pdb_context *context,
 669                                  struct pdb_search *search, uint16 acct_flags)
 670 {
 671         if ((!context) || (!context->pdb_methods)) {
 672                 DEBUG(0, ("invalid pdb_context specified!\n"));
 673                 return False;
 674         }
 675
 676         return context->pdb_methods->search_users(context->pdb_methods,
 677                                                   search, acct_flags);
 678 }
 679
 680 static BOOL context_search_groups(struct pdb_context *context,
 681                                   struct pdb_search *search)
 682 {
 683         if ((!context) || (!context->pdb_methods)) {
 684                 DEBUG(0, ("invalid pdb_context specified!\n"));
 685                 return False;
 686         }
 687
 688         return context->pdb_methods->search_groups(context->pdb_methods,
 689                                                    search);
 690 }
 691
 692 static BOOL context_search_aliases(struct pdb_context *context,
 693                                    struct pdb_search *search,
 694                                    const DOM_SID *sid)
 695 {
 696         if ((!context) || (!context->pdb_methods)) {
 697                 DEBUG(0, ("invalid pdb_context specified!\n"));
 698                 return False;
 699         }
 700
 701         return context->pdb_methods->search_aliases(context->pdb_methods,
 702                                                     search, sid);
 703 }
 704
 705 /******************************************************************
 706   Free and cleanup a pdb context, any associated data and anything
 707   that the attached modules might have associated.
 708  *******************************************************************/
 709
 710 static void free_pdb_context(struct pdb_context **context)
 711 {
 712         struct pdb_methods *pdb_selected = (*context)->pdb_methods;
 713
 714         while (pdb_selected){
 715                 if(pdb_selected->free_private_data)
 716                         pdb_selected->free_private_data(&(pdb_selected->private_data));
 717                 pdb_selected = pdb_selected->next;
 718         }
 719
 720         talloc_destroy((*context)->mem_ctx);
 721         *context = NULL;
 722 }
 723
 724 /******************************************************************
 725   Make a pdb_methods from scratch
 726  *******************************************************************/
 727
 728 static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_context *context, const char *selected)
 729 {
 730         char *module_name = smb_xstrdup(selected);
 731         char *module_location = NULL, *p;
 732         struct pdb_init_function_entry *entry;
 733         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 734
 735         lazy_initialize_passdb();
 736
 737         p = strchr(module_name, ':');
 738
 739         if (p) {
 740                 *p = 0;
 741                 module_location = p+1;
 742                 trim_char(module_location, ' ', ' ');
 743         }
 744
 745         trim_char(module_name, ' ', ' ');
 746
 747
 748         DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
 749
 750         entry = pdb_find_backend_entry(module_name);
 751
 752         /* Try to find a module that contains this module */
 753         if (!entry) {
 754                 DEBUG(2,("No builtin backend found, trying to load plugin\n"));
 755                 if(NT_STATUS_IS_OK(smb_probe_module("pdb", module_name)) && !(entry = pdb_find_backend_entry(module_name))) {
 756                         DEBUG(0,("Plugin is available, but doesn't register passdb backend %s\n", module_name));
 757                         SAFE_FREE(module_name);
 758                         return NT_STATUS_UNSUCCESSFUL;
 759                 }
 760         }
 761
 762         /* No such backend found */
 763         if(!entry) {
 764                 DEBUG(0,("No builtin nor plugin backend for %s found\n", module_name));
 765                 SAFE_FREE(module_name);
 766                 return NT_STATUS_INVALID_PARAMETER;
 767         }
 768
 769         DEBUG(5,("Found pdb backend %s\n", module_name));
 770         nt_status = entry->init(context, methods, module_location);
 771         if (NT_STATUS_IS_OK(nt_status)) {
 772                 DEBUG(5,("pdb backend %s has a valid init\n", selected));
 773         } else {
 774                 DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
 775         }
 776         SAFE_FREE(module_name);
 777         return nt_status;
 778 }
 779
 780 /******************************************************************
 781   Make a pdb_context from scratch.
 782  *******************************************************************/
 783
 784 static NTSTATUS make_pdb_context(struct pdb_context **context)
 785 {
 786         TALLOC_CTX *mem_ctx;
 787
 788         mem_ctx = talloc_init("pdb_context internal allocation context");
 789
 790         if (!mem_ctx) {
 791                 DEBUG(0, ("make_pdb_context: talloc init failed!\n"));
 792                 return NT_STATUS_NO_MEMORY;
 793         }
 794
 795         *context = TALLOC_P(mem_ctx, struct pdb_context);
 796         if (!*context) {
 797                 DEBUG(0, ("make_pdb_context: talloc failed!\n"));
 798                 return NT_STATUS_NO_MEMORY;
 799         }
 800
 801         ZERO_STRUCTP(*context);
 802
 803         (*context)->mem_ctx = mem_ctx;
 804
 805         (*context)->pdb_setsampwent = context_setsampwent;
 806         (*context)->pdb_endsampwent = context_endsampwent;
 807         (*context)->pdb_getsampwent = context_getsampwent;
 808         (*context)->pdb_getsampwnam = context_getsampwnam;
 809         (*context)->pdb_getsampwsid = context_getsampwsid;
 810         (*context)->pdb_add_sam_account = context_add_sam_account;
 811         (*context)->pdb_update_sam_account = context_update_sam_account;
 812         (*context)->pdb_delete_sam_account = context_delete_sam_account;
 813         (*context)->pdb_update_login_attempts = context_update_login_attempts;
 814         (*context)->pdb_getgrsid = context_getgrsid;
 815         (*context)->pdb_getgrgid = context_getgrgid;
 816         (*context)->pdb_getgrnam = context_getgrnam;
 817         (*context)->pdb_add_group_mapping_entry = context_add_group_mapping_entry;
 818         (*context)->pdb_update_group_mapping_entry = context_update_group_mapping_entry;
 819         (*context)->pdb_delete_group_mapping_entry = context_delete_group_mapping_entry;
 820         (*context)->pdb_enum_group_mapping = context_enum_group_mapping;
 821         (*context)->pdb_enum_group_members = context_enum_group_members;
 822         (*context)->pdb_enum_group_memberships = context_enum_group_memberships;
 823
 824         (*context)->pdb_find_alias = context_find_alias;
 825         (*context)->pdb_create_alias = context_create_alias;
 826         (*context)->pdb_delete_alias = context_delete_alias;
 827         (*context)->pdb_get_aliasinfo = context_get_aliasinfo;
 828         (*context)->pdb_set_aliasinfo = context_set_aliasinfo;
 829         (*context)->pdb_add_aliasmem = context_add_aliasmem;
 830         (*context)->pdb_del_aliasmem = context_del_aliasmem;
 831         (*context)->pdb_enum_aliasmem = context_enum_aliasmem;
 832         (*context)->pdb_enum_alias_memberships = context_enum_alias_memberships;
 833         (*context)->pdb_lookup_rids = context_lookup_rids;
 834
 835         (*context)->pdb_search_users = context_search_users;
 836         (*context)->pdb_search_groups = context_search_groups;
 837         (*context)->pdb_search_aliases = context_search_aliases;
 838
 839         (*context)->free_fn = free_pdb_context;
 840
 841         return NT_STATUS_OK;
 842 }
 843
 844
 845 /******************************************************************
 846   Make a pdb_context, given an array of strings
 847  *******************************************************************/
 848
 849 NTSTATUS make_pdb_context_list(struct pdb_context **context, const char **selected)
 850 {
 851         int i = 0;
 852         struct pdb_methods *curmethods, *tmpmethods;
 853         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 854         BOOL have_guest = False;
 855
 856         if (!NT_STATUS_IS_OK(nt_status = make_pdb_context(context))) {
 857                 return nt_status;
 858         }
 859
 860         if (!selected) {
 861                 DEBUG(0, ("ERROR: empty passdb backend list!\n"));
 862                 return nt_status;
 863         }
 864
 865         while (selected[i]){
 866                 if (strcmp(selected[i], "guest") == 0) {
 867                         have_guest = True;
 868                 }
 869                 /* Try to initialise pdb */
 870                 DEBUG(5,("Trying to load: %s\n", selected[i]));
 871                 if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods, *context, selected[i]))) {
 872                         DEBUG(1, ("Loading %s failed!\n", selected[i]));
 873                         free_pdb_context(context);
 874                         return nt_status;
 875                 }
 876                 curmethods->parent = *context;
 877                 DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 878                 i++;
 879         }
 880
 881         if (have_guest)
 882                 return NT_STATUS_OK;
 883
 884         if ( (lp_guestaccount() == NULL) ||
 885              (*lp_guestaccount() == '\0') ) {
 886                 /* We explicitly don't want guest access. No idea what
 887                    else that breaks, but be it that way. */
 888                 return NT_STATUS_OK;
 889         }
 890
 891         if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods,
 892                                                                *context,
 893                                                                "guest"))) {
 894                 DEBUG(1, ("Loading guest module failed!\n"));
 895                 free_pdb_context(context);
 896                 return nt_status;
 897         }
 898
 899         curmethods->parent = *context;
 900         DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 901
 902         return NT_STATUS_OK;
 903 }
 904
 905 /******************************************************************
 906   Make a pdb_context, given a text string.
 907  *******************************************************************/
 908
 909 NTSTATUS make_pdb_context_string(struct pdb_context **context, const char *selected)
 910 {
 911         NTSTATUS ret;
 912         char **newsel = str_list_make(selected, NULL);
 913         ret = make_pdb_context_list(context, (const char **)newsel);
 914         str_list_free(&newsel);
 915         return ret;
 916 }
 917
 918 /******************************************************************
 919  Return an already initialised pdb_context, to facilitate backward
 920  compatibility (see functions below).
 921 *******************************************************************/
 922
 923 static struct pdb_context *pdb_get_static_context(BOOL reload)
 924 {
 925         static struct pdb_context *pdb_context = NULL;
 926
 927         if ((pdb_context) && (reload)) {
 928                 pdb_context->free_fn(&pdb_context);
 929                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 930                         return NULL;
 931                 }
 932         }
 933
 934         if (!pdb_context) {
 935                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 936                         return NULL;
 937                 }
 938         }
 939
 940         return pdb_context;
 941 }
 942
 943 /******************************************************************
 944  Backward compatibility functions for the original passdb interface
 945 *******************************************************************/
 946
 947 BOOL pdb_setsampwent(BOOL update, uint16 acb_mask)
 948 {
 949         struct pdb_context *pdb_context = pdb_get_static_context(False);
 950
 951         if (!pdb_context) {
 952                 return False;
 953         }
 954
 955         return NT_STATUS_IS_OK(pdb_context->pdb_setsampwent(pdb_context, update, acb_mask));
 956 }
 957
 958 void pdb_endsampwent(void)
 959 {
 960         struct pdb_context *pdb_context = pdb_get_static_context(False);
 961
 962         if (!pdb_context) {
 963                 return;
 964         }
 965
 966         pdb_context->pdb_endsampwent(pdb_context);
 967 }
 968
 969 BOOL pdb_getsampwent(SAM_ACCOUNT *user)
 970 {
 971         struct pdb_context *pdb_context = pdb_get_static_context(False);
 972
 973         if (!pdb_context) {
 974                 return False;
 975         }
 976
 977         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwent(pdb_context, user));
 978 }
 979
 980 static SAM_ACCOUNT *sam_account_cache = NULL;
 981
 982 BOOL pdb_getsampwnam(SAM_ACCOUNT *sam_acct, const char *username)
 983 {
 984         struct pdb_context *pdb_context = pdb_get_static_context(False);
 985
 986         if (!pdb_context) {
 987                 return False;
 988         }
 989
 990         if (!NT_STATUS_IS_OK(pdb_context->pdb_getsampwnam(pdb_context,
 991                                                           sam_acct, username)))
 992                 return False;
 993
 994         if (sam_account_cache != NULL) {
 995                 pdb_free_sam(&sam_account_cache);
 996                 sam_account_cache = NULL;
 997         }
 998
 999         pdb_copy_sam_account(sam_acct, &sam_account_cache);
1000         return True;
1001 }
1002
1003 BOOL pdb_getsampwsid(SAM_ACCOUNT *sam_acct, const DOM_SID *sid)
1004 {
1005         struct pdb_context *pdb_context = pdb_get_static_context(False);
1006
1007         if (!pdb_context) {
1008                 return False;
1009         }
1010
1011         if ((sam_account_cache != NULL) &&
1012             (sid_equal(sid, pdb_get_user_sid(sam_account_cache))))
1013                 return pdb_copy_sam_account(sam_account_cache, &sam_acct);
1014
1015         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwsid(pdb_context, sam_acct, sid));
1016 }
1017
1018 BOOL pdb_add_sam_account(SAM_ACCOUNT *sam_acct)
1019 {
1020         struct pdb_context *pdb_context = pdb_get_static_context(False);
1021
1022         if (!pdb_context) {
1023                 return False;
1024         }
1025
1026         return NT_STATUS_IS_OK(pdb_context->pdb_add_sam_account(pdb_context, sam_acct));
1027 }
1028
1029 BOOL pdb_update_sam_account(SAM_ACCOUNT *sam_acct)
1030 {
1031         struct pdb_context *pdb_context = pdb_get_static_context(False);
1032
1033         if (!pdb_context) {
1034                 return False;
1035         }
1036
1037         if (sam_account_cache != NULL) {
1038                 pdb_free_sam(&sam_account_cache);
1039                 sam_account_cache = NULL;
1040         }
1041
1042         return NT_STATUS_IS_OK(pdb_context->pdb_update_sam_account(pdb_context, sam_acct));
1043 }
1044
1045 BOOL pdb_delete_sam_account(SAM_ACCOUNT *sam_acct)
1046 {
1047         struct pdb_context *pdb_context = pdb_get_static_context(False);
1048
1049         if (!pdb_context) {
1050                 return False;
1051         }
1052
1053         if (sam_account_cache != NULL) {
1054                 pdb_free_sam(&sam_account_cache);
1055                 sam_account_cache = NULL;
1056         }
1057
1058         return NT_STATUS_IS_OK(pdb_context->pdb_delete_sam_account(pdb_context, sam_acct));
1059 }
1060
1061 NTSTATUS pdb_update_login_attempts(SAM_ACCOUNT *sam_acct, BOOL success)
1062 {
1063         struct pdb_context *pdb_context = pdb_get_static_context(False);
1064
1065         if (!pdb_context) {
1066                 return NT_STATUS_NOT_IMPLEMENTED;
1067         }
1068
1069         return pdb_context->pdb_update_login_attempts(pdb_context, sam_acct, success);
1070 }
1071
1072 BOOL pdb_getgrsid(GROUP_MAP *map, DOM_SID sid)
1073 {
1074         struct pdb_context *pdb_context = pdb_get_static_context(False);
1075
1076         if (!pdb_context) {
1077                 return False;
1078         }
1079
1080         return NT_STATUS_IS_OK(pdb_context->
1081                                pdb_getgrsid(pdb_context, map, sid));
1082 }
1083
1084 BOOL pdb_getgrgid(GROUP_MAP *map, gid_t gid)
1085 {
1086         struct pdb_context *pdb_context = pdb_get_static_context(False);
1087
1088         if (!pdb_context) {
1089                 return False;
1090         }
1091
1092         return NT_STATUS_IS_OK(pdb_context->
1093                                pdb_getgrgid(pdb_context, map, gid));
1094 }
1095
1096 BOOL pdb_getgrnam(GROUP_MAP *map, const char *name)
1097 {
1098         struct pdb_context *pdb_context = pdb_get_static_context(False);
1099
1100         if (!pdb_context) {
1101                 return False;
1102         }
1103
1104         return NT_STATUS_IS_OK(pdb_context->
1105                                pdb_getgrnam(pdb_context, map, name));
1106 }
1107
1108 BOOL pdb_add_group_mapping_entry(GROUP_MAP *map)
1109 {
1110         struct pdb_context *pdb_context = pdb_get_static_context(False);
1111
1112         if (!pdb_context) {
1113                 return False;
1114         }
1115
1116         return NT_STATUS_IS_OK(pdb_context->
1117                                pdb_add_group_mapping_entry(pdb_context, map));
1118 }
1119
1120 BOOL pdb_update_group_mapping_entry(GROUP_MAP *map)
1121 {
1122         struct pdb_context *pdb_context = pdb_get_static_context(False);
1123
1124         if (!pdb_context) {
1125                 return False;
1126         }
1127
1128         return NT_STATUS_IS_OK(pdb_context->
1129                                pdb_update_group_mapping_entry(pdb_context, map));
1130 }
1131
1132 BOOL pdb_delete_group_mapping_entry(DOM_SID sid)
1133 {
1134         struct pdb_context *pdb_context = pdb_get_static_context(False);
1135
1136         if (!pdb_context) {
1137                 return False;
1138         }
1139
1140         return NT_STATUS_IS_OK(pdb_context->
1141                                pdb_delete_group_mapping_entry(pdb_context, sid));
1142 }
1143
1144 BOOL pdb_enum_group_mapping(enum SID_NAME_USE sid_name_use, GROUP_MAP **rmap,
1145                             int *num_entries, BOOL unix_only)
1146 {
1147         struct pdb_context *pdb_context = pdb_get_static_context(False);
1148
1149         if (!pdb_context) {
1150                 return False;
1151         }
1152
1153         return NT_STATUS_IS_OK(pdb_context->
1154                                pdb_enum_group_mapping(pdb_context, sid_name_use,
1155                                                       rmap, num_entries, unix_only));
1156 }
1157
1158 NTSTATUS pdb_enum_group_members(TALLOC_CTX *mem_ctx,
1159                                 const DOM_SID *sid,
1160                                 uint32 **member_rids,
1161                                 int *num_members)
1162 {
1163         struct pdb_context *pdb_context = pdb_get_static_context(False);
1164
1165         if (!pdb_context) {
1166                 return NT_STATUS_UNSUCCESSFUL;
1167         }
1168
1169         return pdb_context->pdb_enum_group_members(pdb_context, mem_ctx, sid,
1170                                                    member_rids, num_members);
1171 }
1172
1173 NTSTATUS pdb_enum_group_memberships(const char *username, gid_t primary_gid,
1174                                     DOM_SID **sids, gid_t **gids,
1175                                     int *num_groups)
1176 {
1177         struct pdb_context *pdb_context = pdb_get_static_context(False);
1178
1179         if (!pdb_context) {
1180                 return NT_STATUS_UNSUCCESSFUL;
1181         }
1182
1183         return pdb_context->pdb_enum_group_memberships(pdb_context, username,
1184                                                        primary_gid, sids, gids,
1185                                                        num_groups);
1186 }
1187
1188 BOOL pdb_find_alias(const char *name, DOM_SID *sid)
1189 {
1190         struct pdb_context *pdb_context = pdb_get_static_context(False);
1191
1192         if (!pdb_context) {
1193                 return False;
1194         }
1195
1196         return NT_STATUS_IS_OK(pdb_context->pdb_find_alias(pdb_context,
1197                                                              name, sid));
1198 }
1199
1200 NTSTATUS pdb_create_alias(const char *name, uint32 *rid)
1201 {
1202         struct pdb_context *pdb_context = pdb_get_static_context(False);
1203
1204         if (!pdb_context) {
1205                 return NT_STATUS_NOT_IMPLEMENTED;
1206         }
1207
1208         return pdb_context->pdb_create_alias(pdb_context, name, rid);
1209 }
1210
1211 BOOL pdb_delete_alias(const DOM_SID *sid)
1212 {
1213         struct pdb_context *pdb_context = pdb_get_static_context(False);
1214
1215         if (!pdb_context) {
1216                 return False;
1217         }
1218
1219         return NT_STATUS_IS_OK(pdb_context->pdb_delete_alias(pdb_context,
1220                                                              sid));
1221
1222 }
1223
1224 BOOL pdb_get_aliasinfo(const DOM_SID *sid, struct acct_info *info)
1225 {
1226         struct pdb_context *pdb_context = pdb_get_static_context(False);
1227
1228         if (!pdb_context) {
1229                 return False;
1230         }
1231
1232         return NT_STATUS_IS_OK(pdb_context->pdb_get_aliasinfo(pdb_context, sid,
1233                                                               info));
1234 }
1235
1236 BOOL pdb_set_aliasinfo(const DOM_SID *sid, struct acct_info *info)
1237 {
1238         struct pdb_context *pdb_context = pdb_get_static_context(False);
1239
1240         if (!pdb_context) {
1241                 return False;
1242         }
1243
1244         return NT_STATUS_IS_OK(pdb_context->pdb_set_aliasinfo(pdb_context, sid,
1245                                                               info));
1246 }
1247
1248 BOOL pdb_add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
1249 {
1250         struct pdb_context *pdb_context = pdb_get_static_context(False);
1251
1252         if (!pdb_context) {
1253                 return False;
1254         }
1255
1256         return NT_STATUS_IS_OK(pdb_context->
1257                                pdb_add_aliasmem(pdb_context, alias, member));
1258 }
1259
1260 BOOL pdb_del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
1261 {
1262         struct pdb_context *pdb_context = pdb_get_static_context(False);
1263
1264         if (!pdb_context) {
1265                 return False;
1266         }
1267
1268         return NT_STATUS_IS_OK(pdb_context->
1269                                pdb_del_aliasmem(pdb_context, alias, member));
1270 }
1271
1272 BOOL pdb_enum_aliasmem(const DOM_SID *alias,
1273                        DOM_SID **members, int *num_members)
1274 {
1275         struct pdb_context *pdb_context = pdb_get_static_context(False);
1276
1277         if (!pdb_context) {
1278                 return False;
1279         }
1280
1281         return NT_STATUS_IS_OK(pdb_context->
1282                                pdb_enum_aliasmem(pdb_context, alias,
1283                                                  members, num_members));
1284 }
1285
1286 BOOL pdb_enum_alias_memberships(TALLOC_CTX *mem_ctx, const DOM_SID *domain_sid,
1287                                 const DOM_SID *members, int num_members,
1288                                 uint32 **alias_rids, int *num_alias_rids)
1289 {
1290         struct pdb_context *pdb_context = pdb_get_static_context(False);
1291
1292         if (!pdb_context) {
1293                 return False;
1294         }
1295
1296         return NT_STATUS_IS_OK(pdb_context->
1297                                pdb_enum_alias_memberships(pdb_context, mem_ctx,
1298                                                           domain_sid,
1299                                                           members, num_members,
1300                                                           alias_rids,
1301                                                           num_alias_rids));
1302 }
1303
1304 NTSTATUS pdb_lookup_rids(TALLOC_CTX *mem_ctx,
1305                          const DOM_SID *domain_sid,
1306                          int num_rids,
1307                          uint32 *rids,
1308                          const char ***names,
1309                          uint32 **attrs)
1310 {
1311         struct pdb_context *pdb_context = pdb_get_static_context(False);
1312
1313         if (!pdb_context) {
1314                 return NT_STATUS_NOT_IMPLEMENTED;
1315         }
1316
1317         return pdb_context->pdb_lookup_rids(pdb_context, mem_ctx, domain_sid,
1318                                             num_rids, rids, names, attrs);
1319 }
1320
1321 /***************************************************************
1322   Initialize the static context (at smbd startup etc).
1323
1324   If uninitialised, context will auto-init on first use.
1325  ***************************************************************/
1326
1327 BOOL initialize_password_db(BOOL reload)
1328 {
1329         return (pdb_get_static_context(reload) != NULL);
1330 }
1331
1332
1333 /***************************************************************************
1334   Default implementations of some functions.
1335  ****************************************************************************/
1336
1337 static NTSTATUS pdb_default_getsampwnam (struct pdb_methods *methods, SAM_ACCOUNT *user, const char *sname)
1338 {
1339         return NT_STATUS_NO_SUCH_USER;
1340 }
1341
1342 static NTSTATUS pdb_default_getsampwsid(struct pdb_methods *my_methods, SAM_ACCOUNT * user, const DOM_SID *sid)
1343 {
1344         return NT_STATUS_NO_SUCH_USER;
1345 }
1346
1347 static NTSTATUS pdb_default_add_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
1348 {
1349         DEBUG(0,("this backend (%s) should not be listed as the first passdb backend! You can't add users to it.\n", methods->name));
1350         return NT_STATUS_NOT_IMPLEMENTED;
1351 }
1352
1353 static NTSTATUS pdb_default_update_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
1354 {
1355         return NT_STATUS_NOT_IMPLEMENTED;
1356 }
1357
1358 static NTSTATUS pdb_default_delete_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *pwd)
1359 {
1360         return NT_STATUS_NOT_IMPLEMENTED;
1361 }
1362
1363 static NTSTATUS pdb_default_update_login_attempts (struct pdb_methods *methods, SAM_ACCOUNT *newpwd, BOOL success)
1364 {
1365         return NT_STATUS_OK;
1366 }
1367
1368 static NTSTATUS pdb_default_setsampwent(struct pdb_methods *methods, BOOL update, uint16 acb_mask)
1369 {
1370         return NT_STATUS_NOT_IMPLEMENTED;
1371 }
1372
1373 static NTSTATUS pdb_default_getsampwent(struct pdb_methods *methods, SAM_ACCOUNT *user)
1374 {
1375         return NT_STATUS_NOT_IMPLEMENTED;
1376 }
1377
1378 static void pdb_default_endsampwent(struct pdb_methods *methods)
1379 {
1380         return; /* NT_STATUS_NOT_IMPLEMENTED; */
1381 }
1382
1383 static void add_uid_to_array_unique(TALLOC_CTX *mem_ctx,
1384                                     uid_t uid, uid_t **uids, int *num)
1385 {
1386         int i;
1387
1388         for (i=0; i<*num; i++) {
1389                 if ((*uids)[i] == uid)
1390                         return;
1391         }
1392
1393         *uids = TALLOC_REALLOC_ARRAY(mem_ctx, *uids, uid_t, *num+1);
1394
1395         if (*uids == NULL)
1396                 return;
1397
1398         (*uids)[*num] = uid;
1399         *num += 1;
1400 }
1401
1402 static BOOL get_memberuids(TALLOC_CTX *mem_ctx, gid_t gid, uid_t **uids,
1403                            int *num)
1404 {
1405         struct group *grp;
1406         char **gr;
1407         struct sys_pwent *userlist, *user;
1408
1409         *uids = NULL;
1410         *num = 0;
1411
1412         /* We only look at our own sam, so don't care about imported stuff */
1413
1414         winbind_off();
1415
1416         if ((grp = getgrgid(gid)) == NULL) {
1417                 winbind_on();
1418                 return False;
1419         }
1420
1421         /* Primary group members */
1422
1423         userlist = getpwent_list();
1424
1425         for (user = userlist; user != NULL; user = user->next) {
1426                 if (user->pw_gid != gid)
1427                         continue;
1428                 add_uid_to_array_unique(mem_ctx, user->pw_uid, uids, num);
1429         }
1430
1431         pwent_free(userlist);
1432
1433         /* Secondary group members */
1434
1435         for (gr = grp->gr_mem; (*gr != NULL) && ((*gr)[0] != '\0'); gr += 1) {
1436                 struct passwd *pw = getpwnam(*gr);
1437
1438                 if (pw == NULL)
1439                         continue;
1440                 add_uid_to_array_unique(mem_ctx, pw->pw_uid, uids, num);
1441         }
1442
1443         winbind_on();
1444
1445         return True;
1446 }
1447
1448 NTSTATUS pdb_default_enum_group_members(struct pdb_methods *methods,
1449                                         TALLOC_CTX *mem_ctx,
1450                                         const DOM_SID *group,
1451                                         uint32 **member_rids,
1452                                         int *num_members)
1453 {
1454         gid_t gid;
1455         uid_t *uids;
1456         int i, num_uids;
1457
1458         *member_rids = NULL;
1459         *num_members = 0;
1460
1461         if (!NT_STATUS_IS_OK(sid_to_gid(group, &gid)))
1462                 return NT_STATUS_NO_SUCH_GROUP;
1463
1464         if(!get_memberuids(mem_ctx, gid, &uids, &num_uids))
1465                 return NT_STATUS_NO_SUCH_GROUP;
1466
1467         if (num_uids == 0)
1468                 return NT_STATUS_OK;
1469
1470         *member_rids = TALLOC_ZERO_ARRAY(mem_ctx, uint32, num_uids);
1471
1472         for (i=0; i<num_uids; i++) {
1473                 DOM_SID sid;
1474
1475                 if (!NT_STATUS_IS_OK(uid_to_sid(&sid, uids[i]))) {
1476                         DEBUG(1, ("Could not map member uid to SID\n"));
1477                         continue;
1478                 }
1479
1480                 if (!sid_check_is_in_our_domain(&sid)) {
1481                         DEBUG(1, ("Inconsistent SAM -- group member uid not "
1482                                   "in our domain\n"));
1483                         continue;
1484                 }
1485
1486                 sid_peek_rid(&sid, &(*member_rids)[*num_members]);
1487                 *num_members += 1;
1488         }
1489
1490         return NT_STATUS_OK;
1491 }
1492
1493 NTSTATUS pdb_default_lookup_rids(struct pdb_methods *methods,
1494                                  TALLOC_CTX *mem_ctx,
1495                                  const DOM_SID *domain_sid,
1496                                  int num_rids,
1497                                  uint32 *rids,
1498                                  const char ***names,
1499                                  uint32 **attrs)
1500 {
1501         int i;
1502         NTSTATUS result;
1503         BOOL have_mapped = False;
1504         BOOL have_unmapped = False;
1505
1506         (*names) = TALLOC_ZERO_ARRAY(mem_ctx, const char *, num_rids);
1507         (*attrs) = TALLOC_ZERO_ARRAY(mem_ctx, uint32, num_rids);
1508
1509         if ((num_rids != 0) && (((*names) == NULL) || ((*attrs) == NULL)))
1510                 return NT_STATUS_NO_MEMORY;
1511
1512         if (!sid_equal(domain_sid, get_global_sam_sid())) {
1513                 /* TODO: Sooner or later we need to look up BUILTIN rids as
1514                  * well. -- vl */
1515                 goto done;
1516         }
1517
1518         for (i = 0; i < num_rids; i++) {
1519                 fstring tmpname;
1520                 fstring domname;
1521                 DOM_SID sid;
1522                 enum SID_NAME_USE type;
1523
1524                 (*attrs)[i] = SID_NAME_UNKNOWN;
1525
1526                 sid_copy(&sid, domain_sid);
1527                 sid_append_rid(&sid, rids[i]);
1528
1529                 if (lookup_sid(&sid, domname, tmpname, &type)) {
1530                         (*attrs)[i] = (uint32)type;
1531                         (*names)[i] = talloc_strdup(mem_ctx, tmpname);
1532                         if ((*names)[i] == NULL)
1533                                 return NT_STATUS_NO_MEMORY;
1534                         DEBUG(5,("lookup_rids: %s:%d\n", (*names)[i],
1535                                  (*attrs)[i]));
1536                         have_mapped = True;
1537                 } else {
1538                         have_unmapped = True;
1539                 }
1540         }
1541
1542  done:
1543
1544         result = NT_STATUS_NONE_MAPPED;
1545
1546         if (have_mapped)
1547                 result = have_unmapped ? STATUS_SOME_UNMAPPED : NT_STATUS_OK;
1548
1549         return result;
1550 }
1551
1552 static struct pdb_search *pdb_search_init(enum pdb_search_type type)
1553 {
1554         TALLOC_CTX *mem_ctx;
1555         struct pdb_search *result;
1556
1557         mem_ctx = talloc_init("pdb_search");
1558         if (mem_ctx == NULL) {
1559                 DEBUG(0, ("talloc_init failed\n"));
1560                 return NULL;
1561         }
1562
1563         result = TALLOC_P(mem_ctx, struct pdb_search);
1564         if (result == NULL) {
1565                 DEBUG(0, ("talloc failed\n"));
1566                 return NULL;
1567         }
1568
1569         result->mem_ctx = mem_ctx;
1570         result->type = type;
1571         result->cache = NULL;
1572         result->num_entries = 0;
1573         result->cache_size = 0;
1574         result->search_ended = False;
1575
1576         /* Segfault appropriately if not initialized */
1577         result->next_entry = NULL;
1578         result->search_end = NULL;
1579
1580         return result;
1581 }
1582
1583 static void fill_displayentry(TALLOC_CTX *mem_ctx, uint32 rid,
1584                               uint16 acct_flags,
1585                               const char *account_name,
1586                               const char *fullname,
1587                               const char *description,
1588                               struct samr_displayentry *entry)
1589 {
1590         entry->rid = rid;
1591         entry->acct_flags = acct_flags;
1592
1593         if (account_name != NULL)
1594                 entry->account_name = talloc_strdup(mem_ctx, account_name);
1595         else
1596                 entry->account_name = "";
1597
1598         if (fullname != NULL)
1599                 entry->fullname = talloc_strdup(mem_ctx, fullname);
1600         else
1601                 entry->fullname = "";
1602
1603         if (description != NULL)
1604                 entry->description = talloc_strdup(mem_ctx, description);
1605         else
1606                 entry->description = "";
1607 }
1608
1609 static BOOL user_search_in_progress = False;
1610 struct user_search {
1611         uint16 acct_flags;
1612 };
1613
1614 static BOOL next_entry_users(struct pdb_search *s,
1615                              struct samr_displayentry *entry)
1616 {
1617         struct user_search *state = s->private;
1618         SAM_ACCOUNT *user = NULL;
1619         NTSTATUS status;
1620
1621  next:
1622         status = pdb_init_sam(&user);
1623         if (!NT_STATUS_IS_OK(status)) {
1624                 DEBUG(0, ("Could not pdb_init_sam\n"));
1625                 return False;
1626         }
1627
1628         if (!pdb_getsampwent(user)) {
1629                 pdb_free_sam(&user);
1630                 return False;
1631         }
1632
1633         if ((state->acct_flags != 0) &&
1634             ((pdb_get_acct_ctrl(user) & state->acct_flags) == 0)) {
1635                 pdb_free_sam(&user);
1636                 goto next;
1637         }
1638
1639         fill_displayentry(s->mem_ctx, pdb_get_user_rid(user),
1640                           pdb_get_acct_ctrl(user), pdb_get_username(user),
1641                           pdb_get_fullname(user), pdb_get_acct_desc(user),
1642                           entry);
1643
1644         pdb_free_sam(&user);
1645         return True;
1646 }
1647
1648 static void search_end_users(struct pdb_search *search)
1649 {
1650         pdb_endsampwent();
1651         user_search_in_progress = False;
1652 }
1653
1654 static BOOL pdb_default_search_users(struct pdb_methods *methods,
1655                                      struct pdb_search *search,
1656                                      uint16 acct_flags)
1657 {
1658         struct user_search *state;
1659
1660         if (user_search_in_progress) {
1661                 DEBUG(1, ("user search in progress\n"));
1662                 return False;
1663         }
1664
1665         if (!pdb_setsampwent(False, acct_flags)) {
1666                 DEBUG(5, ("Could not start search\n"));
1667                 return False;
1668         }
1669
1670         user_search_in_progress = True;
1671
1672         state = TALLOC_P(search->mem_ctx, struct user_search);
1673         if (state == NULL) {
1674                 DEBUG(0, ("talloc failed\n"));
1675                 return False;
1676         }
1677
1678         state->acct_flags = acct_flags;
1679
1680         search->private = state;
1681         search->next_entry = next_entry_users;
1682         search->search_end = search_end_users;
1683         return True;
1684 }
1685
1686 struct group_search {
1687         GROUP_MAP *groups;
1688         int num_groups, current_group;
1689 };
1690
1691 static BOOL next_entry_groups(struct pdb_search *s,
1692                               struct samr_displayentry *entry)
1693 {
1694         struct group_search *state = s->private;
1695         uint32 rid;
1696         GROUP_MAP *map = &state->groups[state->current_group];
1697
1698         if (state->current_group == state->num_groups)
1699                 return False;
1700
1701         sid_peek_rid(&map->sid, &rid);
1702
1703         fill_displayentry(s->mem_ctx, rid, 0, map->nt_name, NULL, map->comment,
1704                           entry);
1705
1706         state->current_group += 1;
1707         return True;
1708 }
1709
1710 static void search_end_groups(struct pdb_search *search)
1711 {
1712         struct group_search *state = search->private;
1713         SAFE_FREE(state->groups);
1714 }
1715
1716 static BOOL pdb_search_grouptype(struct pdb_search *search,
1717                                  enum SID_NAME_USE type)
1718 {
1719         struct group_search *state;
1720
1721         state = TALLOC_P(search->mem_ctx, struct group_search);
1722         if (state == NULL) {
1723                 DEBUG(0, ("talloc failed\n"));
1724                 return False;
1725         }
1726
1727         if (!pdb_enum_group_mapping(type, &state->groups, &state->num_groups,
1728                                     True)) {
1729                 DEBUG(0, ("Could not enum groups\n"));
1730                 return False;
1731         }
1732
1733         state->current_group = 0;
1734         search->private = state;
1735         search->next_entry = next_entry_groups;
1736         search->search_end = search_end_groups;
1737         return True;
1738 }
1739
1740 static BOOL pdb_default_search_groups(struct pdb_methods *methods,
1741                                       struct pdb_search *search)
1742 {
1743         return pdb_search_grouptype(search, SID_NAME_DOM_GRP);
1744 }
1745
1746 static BOOL pdb_default_search_aliases(struct pdb_methods *methods,
1747                                        struct pdb_search *search,
1748                                        const DOM_SID *sid)
1749 {
1750
1751         if (sid_equal(sid, get_global_sam_sid()))
1752                 return pdb_search_grouptype(search, SID_NAME_ALIAS);
1753
1754         if (sid_equal(sid, &global_sid_Builtin))
1755                 return pdb_search_grouptype(search, SID_NAME_WKN_GRP);
1756
1757         DEBUG(3, ("unknown domain sid: %s\n", sid_string_static(sid)));
1758         return False;
1759 }
1760
1761 static struct samr_displayentry *pdb_search_getentry(struct pdb_search *search,
1762                                                      uint32 idx)
1763 {
1764         if (idx < search->num_entries)
1765                 return &search->cache[idx];
1766
1767         if (search->search_ended)
1768                 return NULL;
1769
1770         while (idx >= search->num_entries) {
1771                 struct samr_displayentry entry;
1772
1773                 if (!search->next_entry(search, &entry)) {
1774                         search->search_end(search);
1775                         search->search_ended = True;
1776                         break;
1777                 }
1778
1779                 ADD_TO_LARGE_ARRAY(search->mem_ctx, struct samr_displayentry,
1780                                    entry, &search->cache, &search->num_entries,
1781                                    &search->cache_size);
1782         }
1783
1784         return (search->num_entries > idx) ? &search->cache[idx] : NULL;
1785 }
1786
1787 struct pdb_search *pdb_search_users(uint16 acct_flags)
1788 {
1789         struct pdb_context *pdb_context = pdb_get_static_context(False);
1790         struct pdb_search *result;
1791
1792         if (pdb_context == NULL) return NULL;
1793
1794         result = pdb_search_init(PDB_USER_SEARCH);
1795         if (result == NULL) return NULL;
1796
1797         if (!pdb_context->pdb_search_users(pdb_context, result, acct_flags)) {
1798                 talloc_destroy(result->mem_ctx);
1799                 return NULL;
1800         }
1801         return result;
1802 }
1803
1804 struct pdb_search *pdb_search_groups(void)
1805 {
1806         struct pdb_context *pdb_context = pdb_get_static_context(False);
1807         struct pdb_search *result;
1808
1809         if (pdb_context == NULL) return NULL;
1810
1811         result = pdb_search_init(PDB_GROUP_SEARCH);
1812         if (result == NULL) return NULL;
1813
1814         if (!pdb_context->pdb_search_groups(pdb_context, result)) {
1815                 talloc_destroy(result->mem_ctx);
1816                 return NULL;
1817         }
1818         return result;
1819 }
1820
1821 struct pdb_search *pdb_search_aliases(const DOM_SID *sid)
1822 {
1823         struct pdb_context *pdb_context = pdb_get_static_context(False);
1824         struct pdb_search *result;
1825
1826         if (pdb_context == NULL) return NULL;
1827
1828         result = pdb_search_init(PDB_ALIAS_SEARCH);
1829         if (result == NULL) return NULL;
1830
1831         if (!pdb_context->pdb_search_aliases(pdb_context, result, sid)) {
1832                 talloc_destroy(result->mem_ctx);
1833                 return NULL;
1834         }
1835         return result;
1836 }
1837
1838 uint32 pdb_search_entries(struct pdb_search *search,
1839                           uint32 start_idx, uint32 max_entries,
1840                           struct samr_displayentry **result)
1841 {
1842         struct samr_displayentry *end_entry;
1843         uint32 end_idx = start_idx+max_entries-1;
1844
1845         /* The first entry needs to be searched after the last. Otherwise the
1846          * first entry might have moved due to a realloc during the search for
1847          * the last entry. */
1848
1849         end_entry = pdb_search_getentry(search, end_idx);
1850         *result = pdb_search_getentry(search, start_idx);
1851
1852         if (end_entry != NULL)
1853                 return max_entries;
1854
1855         if (start_idx >= search->num_entries)
1856                 return 0;
1857
1858         return search->num_entries - start_idx;
1859 }
1860
1861 void pdb_search_destroy(struct pdb_search *search)
1862 {
1863         if (search == NULL)
1864                 return;
1865
1866         if (!search->search_ended)
1867                 search->search_end(search);
1868
1869         talloc_destroy(search->mem_ctx);
1870 }
1871
1872 NTSTATUS make_pdb_methods(TALLOC_CTX *mem_ctx, PDB_METHODS **methods)
1873 {
1874         *methods = TALLOC_P(mem_ctx, struct pdb_methods);
1875
1876         if (!*methods) {
1877                 return NT_STATUS_NO_MEMORY;
1878         }
1879
1880         ZERO_STRUCTP(*methods);
1881
1882         (*methods)->setsampwent = pdb_default_setsampwent;
1883         (*methods)->endsampwent = pdb_default_endsampwent;
1884         (*methods)->getsampwent = pdb_default_getsampwent;
1885         (*methods)->getsampwnam = pdb_default_getsampwnam;
1886         (*methods)->getsampwsid = pdb_default_getsampwsid;
1887         (*methods)->add_sam_account = pdb_default_add_sam_account;
1888         (*methods)->update_sam_account = pdb_default_update_sam_account;
1889         (*methods)->delete_sam_account = pdb_default_delete_sam_account;
1890         (*methods)->update_login_attempts = pdb_default_update_login_attempts;
1891
1892         (*methods)->getgrsid = pdb_default_getgrsid;
1893         (*methods)->getgrgid = pdb_default_getgrgid;
1894         (*methods)->getgrnam = pdb_default_getgrnam;
1895         (*methods)->add_group_mapping_entry = pdb_default_add_group_mapping_entry;
1896         (*methods)->update_group_mapping_entry = pdb_default_update_group_mapping_entry;
1897         (*methods)->delete_group_mapping_entry = pdb_default_delete_group_mapping_entry;
1898         (*methods)->enum_group_mapping = pdb_default_enum_group_mapping;
1899         (*methods)->enum_group_members = pdb_default_enum_group_members;
1900         (*methods)->enum_group_memberships = pdb_default_enum_group_memberships;
1901         (*methods)->find_alias = pdb_default_find_alias;
1902         (*methods)->create_alias = pdb_default_create_alias;
1903         (*methods)->delete_alias = pdb_default_delete_alias;
1904         (*methods)->get_aliasinfo = pdb_default_get_aliasinfo;
1905         (*methods)->set_aliasinfo = pdb_default_set_aliasinfo;
1906         (*methods)->add_aliasmem = pdb_default_add_aliasmem;
1907         (*methods)->del_aliasmem = pdb_default_del_aliasmem;
1908         (*methods)->enum_aliasmem = pdb_default_enum_aliasmem;
1909         (*methods)->enum_alias_memberships = pdb_default_alias_memberships;
1910         (*methods)->lookup_rids = pdb_default_lookup_rids;
1911         (*methods)->search_users = pdb_default_search_users;
1912         (*methods)->search_groups = pdb_default_search_groups;
1913         (*methods)->search_aliases = pdb_default_search_aliases;
1914
1915         return NT_STATUS_OK;
1916 }