source/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
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_PASSDB
  26
  27 static struct pdb_init_function_entry *backends = NULL;
  28
  29 static void lazy_initialize_passdb(void)
  30 {
  31         static BOOL initialized = False;
  32         if(initialized)return;
  33         static_init_pdb;
  34         initialized = True;
  35 }
  36
  37 static struct pdb_init_function_entry *pdb_find_backend_entry(const char *name);
  38
  39 /*******************************************************************
  40  Clean up uninitialised passwords.  The only way to tell
  41  that these values are not 'real' is that they do not
  42  have a valid last set time.  Instead, the value is fixed at 0.
  43  Therefore we use that as the key for 'is this a valid password'.
  44  However, it is perfectly valid to have a 'default' last change
  45  time, such LDAP with a missing attribute would produce.
  46 ********************************************************************/
  47
  48 static void pdb_force_pw_initialization(SAM_ACCOUNT *pass)
  49 {
  50         const char *lm_pwd, *nt_pwd;
  51
  52         /* only reset a password if the last set time has been
  53            explicitly been set to zero.  A default last set time
  54            is ignored */
  55
  56         if ( (pdb_get_init_flags(pass, PDB_PASSLASTSET) != PDB_DEFAULT)
  57                 && (pdb_get_pass_last_set_time(pass) == 0) )
  58         {
  59
  60                 if (pdb_get_init_flags(pass, PDB_LMPASSWD) != PDB_DEFAULT)
  61                 {
  62                         lm_pwd = pdb_get_lanman_passwd(pass);
  63                         if (lm_pwd)
  64                                 pdb_set_lanman_passwd(pass, NULL, PDB_CHANGED);
  65                 }
  66                 if (pdb_get_init_flags(pass, PDB_NTPASSWD) != PDB_DEFAULT)
  67                 {
  68                         nt_pwd = pdb_get_nt_passwd(pass);
  69                         if (nt_pwd)
  70                                 pdb_set_nt_passwd(pass, NULL, PDB_CHANGED);
  71                 }
  72         }
  73
  74         return;
  75 }
  76
  77 NTSTATUS smb_register_passdb(int version, const char *name, pdb_init_function init)
  78 {
  79         struct pdb_init_function_entry *entry = backends;
  80
  81         if(version != PASSDB_INTERFACE_VERSION) {
  82                 DEBUG(0,("Can't register passdb backend!\n"
  83                          "You tried to register a passdb module with PASSDB_INTERFACE_VERSION %d, "
  84                          "while this version of samba uses version %d\n",
  85                          version,PASSDB_INTERFACE_VERSION));
  86                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
  87         }
  88
  89         if (!name || !init) {
  90                 return NT_STATUS_INVALID_PARAMETER;
  91         }
  92
  93         DEBUG(5,("Attempting to register passdb backend %s\n", name));
  94
  95         /* Check for duplicates */
  96         if (pdb_find_backend_entry(name)) {
  97                 DEBUG(0,("There already is a passdb backend registered with the name %s!\n", name));
  98                 return NT_STATUS_OBJECT_NAME_COLLISION;
  99         }
 100
 101         entry = smb_xmalloc(sizeof(struct pdb_init_function_entry));
 102         entry->name = smb_xstrdup(name);
 103         entry->init = init;
 104
 105         DLIST_ADD(backends, entry);
 106         DEBUG(5,("Successfully added passdb backend '%s'\n", name));
 107         return NT_STATUS_OK;
 108 }
 109
 110 static struct pdb_init_function_entry *pdb_find_backend_entry(const char *name)
 111 {
 112         struct pdb_init_function_entry *entry = backends;
 113
 114         while(entry) {
 115                 if (strcmp(entry->name, name)==0) return entry;
 116                 entry = entry->next;
 117         }
 118
 119         return NULL;
 120 }
 121
 122 static NTSTATUS context_setsampwent(struct pdb_context *context, BOOL update)
 123 {
 124         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 125
 126         if (!context) {
 127                 DEBUG(0, ("invalid pdb_context specified!\n"));
 128                 return ret;
 129         }
 130
 131         context->pwent_methods = context->pdb_methods;
 132
 133         if (!context->pwent_methods) {
 134                 /* No passdbs at all */
 135                 return ret;
 136         }
 137
 138         while (NT_STATUS_IS_ERR(ret = context->pwent_methods->setsampwent(context->pwent_methods, update))) {
 139                 context->pwent_methods = context->pwent_methods->next;
 140                 if (context->pwent_methods == NULL)
 141                         return NT_STATUS_UNSUCCESSFUL;
 142         }
 143         return ret;
 144 }
 145
 146 static void context_endsampwent(struct pdb_context *context)
 147 {
 148         if ((!context)){
 149                 DEBUG(0, ("invalid pdb_context specified!\n"));
 150                 return;
 151         }
 152
 153         if (context->pwent_methods && context->pwent_methods->endsampwent)
 154                 context->pwent_methods->endsampwent(context->pwent_methods);
 155
 156         /* So we won't get strange data when calling getsampwent now */
 157         context->pwent_methods = NULL;
 158 }
 159
 160 static NTSTATUS context_getsampwent(struct pdb_context *context, SAM_ACCOUNT *user)
 161 {
 162         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 163
 164         if ((!context) || (!context->pwent_methods)) {
 165                 DEBUG(0, ("invalid pdb_context specified!\n"));
 166                 return ret;
 167         }
 168         /* Loop until we find something useful */
 169         while (NT_STATUS_IS_ERR(ret = context->pwent_methods->getsampwent(context->pwent_methods, user))) {
 170
 171                 context->pwent_methods->endsampwent(context->pwent_methods);
 172
 173                 context->pwent_methods = context->pwent_methods->next;
 174
 175                 /* All methods are checked now. There are no more entries */
 176                 if (context->pwent_methods == NULL)
 177                         return ret;
 178
 179                 context->pwent_methods->setsampwent(context->pwent_methods, False);
 180         }
 181         user->methods = context->pwent_methods;
 182         pdb_force_pw_initialization(user);
 183         return ret;
 184 }
 185
 186 static NTSTATUS context_getsampwnam(struct pdb_context *context, SAM_ACCOUNT *sam_acct, const char *username)
 187 {
 188         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 189
 190         struct pdb_methods *curmethods;
 191         if ((!context)) {
 192                 DEBUG(0, ("invalid pdb_context specified!\n"));
 193                 return ret;
 194         }
 195         curmethods = context->pdb_methods;
 196         while (curmethods){
 197                 if (NT_STATUS_IS_OK(ret = curmethods->getsampwnam(curmethods, sam_acct, username))) {
 198                         pdb_force_pw_initialization(sam_acct);
 199                         sam_acct->methods = curmethods;
 200                         return ret;
 201                 }
 202                 curmethods = curmethods->next;
 203         }
 204
 205         return ret;
 206 }
 207
 208 static NTSTATUS context_getsampwsid(struct pdb_context *context, SAM_ACCOUNT *sam_acct, const DOM_SID *sid)
 209 {
 210         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 211
 212         struct pdb_methods *curmethods;
 213         if ((!context)) {
 214                 DEBUG(0, ("invalid pdb_context specified!\n"));
 215                 return ret;
 216         }
 217
 218         curmethods = context->pdb_methods;
 219
 220         while (curmethods){
 221                 if (NT_STATUS_IS_OK(ret = curmethods->getsampwsid(curmethods, sam_acct, sid))) {
 222                         pdb_force_pw_initialization(sam_acct);
 223                         sam_acct->methods = curmethods;
 224                         return ret;
 225                 }
 226                 curmethods = curmethods->next;
 227         }
 228
 229         return ret;
 230 }
 231
 232 static NTSTATUS context_add_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 233 {
 234         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 235
 236         if ((!context) || (!context->pdb_methods)) {
 237                 DEBUG(0, ("invalid pdb_context specified!\n"));
 238                 return ret;
 239         }
 240
 241         /** @todo  This is where a 're-read on add' should be done */
 242         /* We now add a new account to the first database listed.
 243          * Should we? */
 244
 245         return context->pdb_methods->add_sam_account(context->pdb_methods, sam_acct);
 246 }
 247
 248 static NTSTATUS context_update_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 249 {
 250         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 251
 252         if (!context) {
 253                 DEBUG(0, ("invalid pdb_context specified!\n"));
 254                 return ret;
 255         }
 256
 257         if (!sam_acct || !sam_acct->methods){
 258                 DEBUG(0, ("invalid sam_acct specified\n"));
 259                 return ret;
 260         }
 261
 262         /** @todo  This is where a 're-read on update' should be done */
 263
 264         return sam_acct->methods->update_sam_account(sam_acct->methods, sam_acct);
 265 }
 266
 267 static NTSTATUS context_delete_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 268 {
 269         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 270
 271         struct pdb_methods *pdb_selected;
 272         if (!context) {
 273                 DEBUG(0, ("invalid pdb_context specified!\n"));
 274                 return ret;
 275         }
 276
 277         if (!sam_acct->methods){
 278                 pdb_selected = context->pdb_methods;
 279                 /* There's no passdb backend specified for this account.
 280                  * Try to delete it in every passdb available
 281                  * Needed to delete accounts in smbpasswd that are not
 282                  * in /etc/passwd.
 283                  */
 284                 while (pdb_selected){
 285                         if (NT_STATUS_IS_OK(ret = pdb_selected->delete_sam_account(pdb_selected, sam_acct))) {
 286                                 return ret;
 287                         }
 288                         pdb_selected = pdb_selected->next;
 289                 }
 290                 return ret;
 291         }
 292
 293         if (!sam_acct->methods->delete_sam_account){
 294                 DEBUG(0,("invalid sam_acct->methods->delete_sam_account\n"));
 295                 return ret;
 296         }
 297
 298         return sam_acct->methods->delete_sam_account(sam_acct->methods, sam_acct);
 299 }
 300
 301 static NTSTATUS context_getgrsid(struct pdb_context *context,
 302                                  GROUP_MAP *map, DOM_SID sid)
 303 {
 304         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 305
 306         struct pdb_methods *curmethods;
 307         if ((!context)) {
 308                 DEBUG(0, ("invalid pdb_context specified!\n"));
 309                 return ret;
 310         }
 311         curmethods = context->pdb_methods;
 312         while (curmethods){
 313                 ret = curmethods->getgrsid(curmethods, map, sid);
 314                 if (NT_STATUS_IS_OK(ret)) {
 315                         map->methods = curmethods;
 316                         return ret;
 317                 }
 318                 curmethods = curmethods->next;
 319         }
 320
 321         return ret;
 322 }
 323
 324 static NTSTATUS context_getgrgid(struct pdb_context *context,
 325                                  GROUP_MAP *map, gid_t gid)
 326 {
 327         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 328
 329         struct pdb_methods *curmethods;
 330         if ((!context)) {
 331                 DEBUG(0, ("invalid pdb_context specified!\n"));
 332                 return ret;
 333         }
 334         curmethods = context->pdb_methods;
 335         while (curmethods){
 336                 ret = curmethods->getgrgid(curmethods, map, gid);
 337                 if (NT_STATUS_IS_OK(ret)) {
 338                         map->methods = curmethods;
 339                         return ret;
 340                 }
 341                 curmethods = curmethods->next;
 342         }
 343
 344         return ret;
 345 }
 346
 347 static NTSTATUS context_getgrnam(struct pdb_context *context,
 348                                  GROUP_MAP *map, const char *name)
 349 {
 350         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 351
 352         struct pdb_methods *curmethods;
 353         if ((!context)) {
 354                 DEBUG(0, ("invalid pdb_context specified!\n"));
 355                 return ret;
 356         }
 357         curmethods = context->pdb_methods;
 358         while (curmethods){
 359                 ret = curmethods->getgrnam(curmethods, map, name);
 360                 if (NT_STATUS_IS_OK(ret)) {
 361                         map->methods = curmethods;
 362                         return ret;
 363                 }
 364                 curmethods = curmethods->next;
 365         }
 366
 367         return ret;
 368 }
 369
 370 static NTSTATUS context_add_group_mapping_entry(struct pdb_context *context,
 371                                                 GROUP_MAP *map)
 372 {
 373         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 374
 375         if ((!context) || (!context->pdb_methods)) {
 376                 DEBUG(0, ("invalid pdb_context specified!\n"));
 377                 return ret;
 378         }
 379
 380         return context->pdb_methods->add_group_mapping_entry(context->pdb_methods,
 381                                                              map);
 382 }
 383
 384 static NTSTATUS context_update_group_mapping_entry(struct pdb_context *context,
 385                                                    GROUP_MAP *map)
 386 {
 387         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 388
 389         if ((!context) || (!context->pdb_methods)) {
 390                 DEBUG(0, ("invalid pdb_context specified!\n"));
 391                 return ret;
 392         }
 393
 394         return context->
 395                 pdb_methods->update_group_mapping_entry(context->pdb_methods, map);
 396 }
 397
 398 static NTSTATUS context_delete_group_mapping_entry(struct pdb_context *context,
 399                                                    DOM_SID sid)
 400 {
 401         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 402
 403         if ((!context) || (!context->pdb_methods)) {
 404                 DEBUG(0, ("invalid pdb_context specified!\n"));
 405                 return ret;
 406         }
 407
 408         return context->
 409                 pdb_methods->delete_group_mapping_entry(context->pdb_methods, sid);
 410 }
 411
 412 static NTSTATUS context_enum_group_mapping(struct pdb_context *context,
 413                                            enum SID_NAME_USE sid_name_use,
 414                                            GROUP_MAP **rmap, int *num_entries,
 415                                            BOOL unix_only)
 416 {
 417         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 418
 419         if ((!context) || (!context->pdb_methods)) {
 420                 DEBUG(0, ("invalid pdb_context specified!\n"));
 421                 return ret;
 422         }
 423
 424         return context->pdb_methods->enum_group_mapping(context->pdb_methods,
 425                                                         sid_name_use, rmap,
 426                                                         num_entries, unix_only);
 427 }
 428
 429 static NTSTATUS context_add_aliasmem(struct pdb_context *context,
 430                                      const DOM_SID *alias,
 431                                      const DOM_SID *member)
 432 {
 433         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 434
 435         if ((!context) || (!context->pdb_methods)) {
 436                 DEBUG(0, ("invalid pdb_context specified!\n"));
 437                 return ret;
 438         }
 439
 440         return context->pdb_methods->add_aliasmem(context->pdb_methods,
 441                                                   alias, member);
 442 }
 443
 444 static NTSTATUS context_del_aliasmem(struct pdb_context *context,
 445                                      const DOM_SID *alias,
 446                                      const DOM_SID *member)
 447 {
 448         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 449
 450         if ((!context) || (!context->pdb_methods)) {
 451                 DEBUG(0, ("invalid pdb_context specified!\n"));
 452                 return ret;
 453         }
 454
 455         return context->pdb_methods->del_aliasmem(context->pdb_methods,
 456                                                   alias, member);
 457 }
 458
 459 static NTSTATUS context_enum_aliasmem(struct pdb_context *context,
 460                                       const DOM_SID *alias, DOM_SID **members,
 461                                       int *num)
 462 {
 463         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 464
 465         if ((!context) || (!context->pdb_methods)) {
 466                 DEBUG(0, ("invalid pdb_context specified!\n"));
 467                 return ret;
 468         }
 469
 470         return context->pdb_methods->enum_aliasmem(context->pdb_methods,
 471                                                    alias, members, num);
 472 }
 473
 474 static NTSTATUS context_enum_alias_memberships(struct pdb_context *context,
 475                                                const DOM_SID *sid,
 476                                                DOM_SID **aliases, int *num)
 477 {
 478         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 479
 480         if ((!context) || (!context->pdb_methods)) {
 481                 DEBUG(0, ("invalid pdb_context specified!\n"));
 482                 return ret;
 483         }
 484
 485         return context->pdb_methods->
 486                 enum_alias_memberships(context->pdb_methods, sid, aliases,
 487                                        num);
 488 }
 489
 490 static NTSTATUS context_gettrustpwent(struct pdb_context *context,
 491                                       SAM_TRUST_PASSWD *trust)
 492 {
 493         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 494         struct pdb_methods *cur_methods;
 495
 496         if (!context) {
 497                 DEBUG(0, ("invalid pdb_context specified!\n"));
 498                 return ret;
 499         }
 500
 501         cur_methods = context->pdb_methods;
 502
 503         while (cur_methods) {
 504                 ret = cur_methods->gettrustpwent(cur_methods, trust);
 505                 if (NT_STATUS_IS_OK(ret)) {
 506                         trust->methods = cur_methods;
 507                         return ret;
 508                 }
 509                 cur_methods = cur_methods->next;
 510         }
 511
 512         return ret;
 513 }
 514
 515 static NTSTATUS context_gettrustpwsid(struct pdb_context *context,
 516                                       SAM_TRUST_PASSWD *trust,
 517                                       const DOM_SID *sid)
 518 {
 519         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 520         struct pdb_methods *cur_methods;
 521
 522         if (!context) {
 523                 DEBUG(0, ("invalid pdb_context specified!\n"));
 524                 return ret;
 525         }
 526
 527         cur_methods = context->pdb_methods;
 528
 529         while (cur_methods) {
 530                 ret = cur_methods->gettrustpwsid(cur_methods, trust, sid);
 531                 if (NT_STATUS_IS_OK(ret)) {
 532                         trust->methods = cur_methods;
 533                         return ret;
 534                 }
 535                 cur_methods = cur_methods->next;
 536         }
 537
 538         return ret;
 539 }
 540
 541 static NTSTATUS context_add_trust_passwd(struct pdb_context *context,
 542                                          SAM_TRUST_PASSWD *trust)
 543 {
 544         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 545
 546         if (!context) {
 547                 DEBUG(0, ("invalid pdb_context specified!\n"));
 548                 return ret;
 549         }
 550
 551         return context->pdb_methods->add_trust_passwd(context->pdb_methods, trust);
 552 }
 553
 554 static NTSTATUS context_update_trust_passwd(struct pdb_context *context,
 555                                             SAM_TRUST_PASSWD *trust)
 556 {
 557         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 558
 559         if (!context) {
 560                 DEBUG(0, ("invalid pdb_context specified!\n"));
 561                 return ret;
 562         }
 563
 564         if (!trust || !trust->methods) {
 565                 DEBUG(0, ("invalid trust pointer specified!\n"));
 566                 return ret;
 567         }
 568
 569         return trust->methods->update_trust_passwd(trust->methods, trust);
 570 }
 571
 572 static NTSTATUS context_delete_trust_passwd(struct pdb_context *context,
 573                                             SAM_TRUST_PASSWD *trust)
 574 {
 575         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 576
 577         if (!context) {
 578                 DEBUG(0, ("invalid pdb_context specified!\n"));
 579                 return ret;
 580         }
 581
 582         if (!trust || !trust->methods) {
 583                 DEBUG(0, ("invalid trust pointer specified!\n"));
 584                 return ret;
 585         }
 586
 587         return trust->methods->delete_trust_passwd(trust->methods, trust);
 588 }
 589
 590 /******************************************************************
 591   Free and cleanup a pdb context, any associated data and anything
 592   that the attached modules might have associated.
 593  *******************************************************************/
 594
 595 static void free_pdb_context(struct pdb_context **context)
 596 {
 597         struct pdb_methods *pdb_selected = (*context)->pdb_methods;
 598
 599         while (pdb_selected){
 600                 if(pdb_selected->free_private_data)
 601                         pdb_selected->free_private_data(&(pdb_selected->private_data));
 602                 pdb_selected = pdb_selected->next;
 603         }
 604
 605         talloc_destroy((*context)->mem_ctx);
 606         *context = NULL;
 607 }
 608
 609 /******************************************************************
 610   Make a pdb_methods from scratch
 611  *******************************************************************/
 612
 613 static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_context *context, const char *selected)
 614 {
 615         char *module_name = smb_xstrdup(selected);
 616         char *module_location = NULL, *p;
 617         struct pdb_init_function_entry *entry;
 618         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 619
 620         lazy_initialize_passdb();
 621
 622         p = strchr(module_name, ':');
 623
 624         if (p) {
 625                 *p = 0;
 626                 module_location = p+1;
 627                 trim_char(module_location, ' ', ' ');
 628         }
 629
 630         trim_char(module_name, ' ', ' ');
 631
 632
 633         DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
 634
 635         entry = pdb_find_backend_entry(module_name);
 636
 637         /* Try to find a module that contains this module */
 638         if (!entry) {
 639                 DEBUG(2,("No builtin backend found, trying to load plugin\n"));
 640                 if(NT_STATUS_IS_OK(smb_probe_module("pdb", module_name)) && !(entry = pdb_find_backend_entry(module_name))) {
 641                         DEBUG(0,("Plugin is available, but doesn't register passdb backend %s\n", module_name));
 642                         SAFE_FREE(module_name);
 643                         return NT_STATUS_UNSUCCESSFUL;
 644                 }
 645         }
 646
 647         /* No such backend found */
 648         if(!entry) {
 649                 DEBUG(0,("No builtin nor plugin backend for %s found\n", module_name));
 650                 SAFE_FREE(module_name);
 651                 return NT_STATUS_INVALID_PARAMETER;
 652         }
 653
 654         DEBUG(5,("Found pdb backend %s\n", module_name));
 655         nt_status = entry->init(context, methods, module_location);
 656         if (NT_STATUS_IS_OK(nt_status)) {
 657                 DEBUG(5,("pdb backend %s has a valid init\n", selected));
 658         } else {
 659                 DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
 660         }
 661         SAFE_FREE(module_name);
 662         return nt_status;
 663 }
 664
 665 /******************************************************************
 666   Make a pdb_context from scratch.
 667  *******************************************************************/
 668
 669 static NTSTATUS make_pdb_context(struct pdb_context **context)
 670 {
 671         TALLOC_CTX *mem_ctx;
 672
 673         mem_ctx = talloc_init("pdb_context internal allocation context");
 674
 675         if (!mem_ctx) {
 676                 DEBUG(0, ("make_pdb_context: talloc init failed!\n"));
 677                 return NT_STATUS_NO_MEMORY;
 678         }
 679
 680         *context = talloc(mem_ctx, sizeof(**context));
 681         if (!*context) {
 682                 DEBUG(0, ("make_pdb_context: talloc failed!\n"));
 683                 return NT_STATUS_NO_MEMORY;
 684         }
 685
 686         ZERO_STRUCTP(*context);
 687
 688         (*context)->mem_ctx = mem_ctx;
 689
 690         (*context)->pdb_setsampwent = context_setsampwent;
 691         (*context)->pdb_endsampwent = context_endsampwent;
 692         (*context)->pdb_getsampwent = context_getsampwent;
 693         (*context)->pdb_getsampwnam = context_getsampwnam;
 694         (*context)->pdb_getsampwsid = context_getsampwsid;
 695         (*context)->pdb_add_sam_account = context_add_sam_account;
 696         (*context)->pdb_update_sam_account = context_update_sam_account;
 697         (*context)->pdb_delete_sam_account = context_delete_sam_account;
 698         (*context)->pdb_getgrsid = context_getgrsid;
 699         (*context)->pdb_getgrgid = context_getgrgid;
 700         (*context)->pdb_getgrnam = context_getgrnam;
 701         (*context)->pdb_add_group_mapping_entry = context_add_group_mapping_entry;
 702         (*context)->pdb_update_group_mapping_entry = context_update_group_mapping_entry;
 703         (*context)->pdb_delete_group_mapping_entry = context_delete_group_mapping_entry;
 704         (*context)->pdb_enum_group_mapping = context_enum_group_mapping;
 705         (*context)->pdb_add_aliasmem = context_add_aliasmem;
 706         (*context)->pdb_del_aliasmem = context_del_aliasmem;
 707         (*context)->pdb_enum_aliasmem = context_enum_aliasmem;
 708         (*context)->pdb_enum_alias_memberships = context_enum_alias_memberships;
 709         (*context)->pdb_gettrustpwent = context_gettrustpwent;
 710         (*context)->pdb_gettrustpwsid = context_gettrustpwsid;
 711         (*context)->pdb_add_trust_passwd = context_add_trust_passwd;
 712         (*context)->pdb_update_trust_passwd = context_update_trust_passwd;
 713         (*context)->pdb_delete_trust_passwd = context_delete_trust_passwd;
 714
 715         (*context)->free_fn = free_pdb_context;
 716
 717         return NT_STATUS_OK;
 718 }
 719
 720
 721 /******************************************************************
 722   Make a pdb_context, given an array of strings
 723  *******************************************************************/
 724
 725 NTSTATUS make_pdb_context_list(struct pdb_context **context, const char **selected)
 726 {
 727         int i = 0;
 728         struct pdb_methods *curmethods, *tmpmethods;
 729         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 730         BOOL have_guest = False;
 731
 732         if (!NT_STATUS_IS_OK(nt_status = make_pdb_context(context))) {
 733                 return nt_status;
 734         }
 735
 736         if (!selected) {
 737                 DEBUG(0, ("ERROR: empty passdb backend list!\n"));
 738                 return nt_status;
 739         }
 740
 741         while (selected[i]){
 742                 if (strcmp(selected[i], "guest") == 0) {
 743                         have_guest = True;
 744                 }
 745                 /* Try to initialise pdb */
 746                 DEBUG(5,("Trying to load: %s\n", selected[i]));
 747                 if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods, *context, selected[i]))) {
 748                         DEBUG(1, ("Loading %s failed!\n", selected[i]));
 749                         free_pdb_context(context);
 750                         return nt_status;
 751                 }
 752                 curmethods->parent = *context;
 753                 DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 754                 i++;
 755         }
 756
 757         if (have_guest)
 758                 return NT_STATUS_OK;
 759
 760         if ( (lp_guestaccount() == NULL) ||
 761              (*lp_guestaccount() == '\0') ) {
 762                 /* We explicitly don't want guest access. No idea what
 763                    else that breaks, but be it that way. */
 764                 return NT_STATUS_OK;
 765         }
 766
 767         if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods,
 768                                                                *context,
 769                                                                "guest"))) {
 770                 DEBUG(1, ("Loading guest module failed!\n"));
 771                 free_pdb_context(context);
 772                 return nt_status;
 773         }
 774
 775         curmethods->parent = *context;
 776         DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 777
 778         return NT_STATUS_OK;
 779 }
 780
 781 /******************************************************************
 782   Make a pdb_context, given a text string.
 783  *******************************************************************/
 784
 785 NTSTATUS make_pdb_context_string(struct pdb_context **context, const char *selected)
 786 {
 787         NTSTATUS ret;
 788         char **newsel = str_list_make(selected, NULL);
 789         ret = make_pdb_context_list(context, (const char **)newsel);
 790         str_list_free(&newsel);
 791         return ret;
 792 }
 793
 794 /******************************************************************
 795  Return an already initialised pdb_context, to facilitate backward
 796  compatibility (see functions below).
 797 *******************************************************************/
 798
 799 static struct pdb_context *pdb_get_static_context(BOOL reload)
 800 {
 801         static struct pdb_context *pdb_context = NULL;
 802
 803         if ((pdb_context) && (reload)) {
 804                 pdb_context->free_fn(&pdb_context);
 805                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 806                         return NULL;
 807                 }
 808         }
 809
 810         if (!pdb_context) {
 811                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 812                         return NULL;
 813                 }
 814         }
 815
 816         return pdb_context;
 817 }
 818
 819 /******************************************************************
 820  Backward compatibility functions for the original passdb interface
 821 *******************************************************************/
 822
 823 BOOL pdb_setsampwent(BOOL update)
 824 {
 825         struct pdb_context *pdb_context = pdb_get_static_context(False);
 826
 827         if (!pdb_context) {
 828                 return False;
 829         }
 830
 831         return NT_STATUS_IS_OK(pdb_context->pdb_setsampwent(pdb_context, update));
 832 }
 833
 834 void pdb_endsampwent(void)
 835 {
 836         struct pdb_context *pdb_context = pdb_get_static_context(False);
 837
 838         if (!pdb_context) {
 839                 return;
 840         }
 841
 842         pdb_context->pdb_endsampwent(pdb_context);
 843 }
 844
 845 BOOL pdb_getsampwent(SAM_ACCOUNT *user)
 846 {
 847         struct pdb_context *pdb_context = pdb_get_static_context(False);
 848
 849         if (!pdb_context) {
 850                 return False;
 851         }
 852
 853         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwent(pdb_context, user));
 854 }
 855
 856 BOOL pdb_getsampwnam(SAM_ACCOUNT *sam_acct, const char *username)
 857 {
 858         struct pdb_context *pdb_context = pdb_get_static_context(False);
 859
 860         if (!pdb_context) {
 861                 return False;
 862         }
 863
 864         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwnam(pdb_context, sam_acct, username));
 865 }
 866
 867 BOOL pdb_getsampwsid(SAM_ACCOUNT *sam_acct, const DOM_SID *sid)
 868 {
 869         struct pdb_context *pdb_context = pdb_get_static_context(False);
 870
 871         if (!pdb_context) {
 872                 return False;
 873         }
 874
 875         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwsid(pdb_context, sam_acct, sid));
 876 }
 877
 878 BOOL pdb_add_sam_account(SAM_ACCOUNT *sam_acct)
 879 {
 880         struct pdb_context *pdb_context = pdb_get_static_context(False);
 881         const char *lm_pw, *nt_pw;
 882         uint16 acb_flags;
 883
 884         if (!pdb_context) {
 885                 return False;
 886         }
 887
 888         /* disable acccounts with no passwords (that has not
 889            been allowed by the  ACB_PWNOTREQ bit */
 890
 891         lm_pw = pdb_get_lanman_passwd( sam_acct );
 892         nt_pw = pdb_get_nt_passwd( sam_acct );
 893         acb_flags = pdb_get_acct_ctrl( sam_acct );
 894         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 895                 acb_flags |= ACB_DISABLED;
 896                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 897         }
 898
 899         return NT_STATUS_IS_OK(pdb_context->pdb_add_sam_account(pdb_context, sam_acct));
 900 }
 901
 902 BOOL pdb_update_sam_account(SAM_ACCOUNT *sam_acct)
 903 {
 904         struct pdb_context *pdb_context = pdb_get_static_context(False);
 905         const char *lm_pw, *nt_pw;
 906         uint16 acb_flags;
 907
 908         if (!pdb_context) {
 909                 return False;
 910         }
 911
 912         /* disable acccounts with no passwords (that has not
 913            been allowed by the  ACB_PWNOTREQ bit */
 914
 915         lm_pw = pdb_get_lanman_passwd( sam_acct );
 916         nt_pw = pdb_get_nt_passwd( sam_acct );
 917         acb_flags = pdb_get_acct_ctrl( sam_acct );
 918         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 919                 acb_flags |= ACB_DISABLED;
 920                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 921         }
 922
 923         return NT_STATUS_IS_OK(pdb_context->pdb_update_sam_account(pdb_context, sam_acct));
 924 }
 925
 926 BOOL pdb_delete_sam_account(SAM_ACCOUNT *sam_acct)
 927 {
 928         struct pdb_context *pdb_context = pdb_get_static_context(False);
 929
 930         if (!pdb_context) {
 931                 return False;
 932         }
 933
 934         return NT_STATUS_IS_OK(pdb_context->pdb_delete_sam_account(pdb_context, sam_acct));
 935 }
 936
 937 BOOL pdb_getgrsid(GROUP_MAP *map, DOM_SID sid)
 938 {
 939         struct pdb_context *pdb_context = pdb_get_static_context(False);
 940
 941         if (!pdb_context) {
 942                 return False;
 943         }
 944
 945         return NT_STATUS_IS_OK(pdb_context->
 946                                pdb_getgrsid(pdb_context, map, sid));
 947 }
 948
 949 BOOL pdb_getgrgid(GROUP_MAP *map, gid_t gid)
 950 {
 951         struct pdb_context *pdb_context = pdb_get_static_context(False);
 952
 953         if (!pdb_context) {
 954                 return False;
 955         }
 956
 957         return NT_STATUS_IS_OK(pdb_context->
 958                                pdb_getgrgid(pdb_context, map, gid));
 959 }
 960
 961 BOOL pdb_getgrnam(GROUP_MAP *map, const char *name)
 962 {
 963         struct pdb_context *pdb_context = pdb_get_static_context(False);
 964
 965         if (!pdb_context) {
 966                 return False;
 967         }
 968
 969         return NT_STATUS_IS_OK(pdb_context->
 970                                pdb_getgrnam(pdb_context, map, name));
 971 }
 972
 973 BOOL pdb_add_group_mapping_entry(GROUP_MAP *map)
 974 {
 975         struct pdb_context *pdb_context = pdb_get_static_context(False);
 976
 977         if (!pdb_context) {
 978                 return False;
 979         }
 980
 981         return NT_STATUS_IS_OK(pdb_context->
 982                                pdb_add_group_mapping_entry(pdb_context, map));
 983 }
 984
 985 BOOL pdb_update_group_mapping_entry(GROUP_MAP *map)
 986 {
 987         struct pdb_context *pdb_context = pdb_get_static_context(False);
 988
 989         if (!pdb_context) {
 990                 return False;
 991         }
 992
 993         return NT_STATUS_IS_OK(pdb_context->
 994                                pdb_update_group_mapping_entry(pdb_context, map));
 995 }
 996
 997 BOOL pdb_delete_group_mapping_entry(DOM_SID sid)
 998 {
 999         struct pdb_context *pdb_context = pdb_get_static_context(False);
1000
1001         if (!pdb_context) {
1002                 return False;
1003         }
1004
1005         return NT_STATUS_IS_OK(pdb_context->
1006                                pdb_delete_group_mapping_entry(pdb_context, sid));
1007 }
1008
1009 BOOL pdb_enum_group_mapping(enum SID_NAME_USE sid_name_use, GROUP_MAP **rmap,
1010                             int *num_entries, BOOL unix_only)
1011 {
1012         struct pdb_context *pdb_context = pdb_get_static_context(False);
1013
1014         if (!pdb_context) {
1015                 return False;
1016         }
1017
1018         return NT_STATUS_IS_OK(pdb_context->
1019                                pdb_enum_group_mapping(pdb_context, sid_name_use,
1020                                                       rmap, num_entries, unix_only));
1021 }
1022
1023 BOOL pdb_add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
1024 {
1025         struct pdb_context *pdb_context = pdb_get_static_context(False);
1026
1027         if (!pdb_context) {
1028                 return False;
1029         }
1030
1031         return NT_STATUS_IS_OK(pdb_context->
1032                                pdb_add_aliasmem(pdb_context, alias, member));
1033 }
1034
1035 BOOL pdb_del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
1036 {
1037         struct pdb_context *pdb_context = pdb_get_static_context(False);
1038
1039         if (!pdb_context) {
1040                 return False;
1041         }
1042
1043         return NT_STATUS_IS_OK(pdb_context->
1044                                pdb_add_aliasmem(pdb_context, alias, member));
1045 }
1046
1047 BOOL pdb_enum_aliasmem(const DOM_SID *alias,
1048                        DOM_SID **members, int *num_members)
1049 {
1050         struct pdb_context *pdb_context = pdb_get_static_context(False);
1051
1052         if (!pdb_context) {
1053                 return False;
1054         }
1055
1056         return NT_STATUS_IS_OK(pdb_context->
1057                                pdb_enum_aliasmem(pdb_context, alias,
1058                                                  members, num_members));
1059 }
1060
1061 BOOL pdb_enum_alias_memberships(const DOM_SID *sid,
1062                                 DOM_SID **aliases, int *num)
1063 {
1064         struct pdb_context *pdb_context = pdb_get_static_context(False);
1065
1066         if (!pdb_context) {
1067                 return False;
1068         }
1069
1070         return NT_STATUS_IS_OK(pdb_context->
1071                                pdb_enum_alias_memberships(pdb_context, sid,
1072                                                           aliases, num));
1073 }
1074
1075 /***************************************************************
1076   Initialize the static context (at smbd startup etc).
1077
1078   If uninitialised, context will auto-init on first use.
1079  ***************************************************************/
1080
1081 BOOL initialize_password_db(BOOL reload)
1082 {
1083         return (pdb_get_static_context(reload) != NULL);
1084 }
1085
1086
1087 /***************************************************************************
1088   Default implementations of some functions.
1089  ****************************************************************************/
1090
1091 static NTSTATUS pdb_default_getsampwnam (struct pdb_methods *methods, SAM_ACCOUNT *user, const char *sname)
1092 {
1093         return NT_STATUS_NO_SUCH_USER;
1094 }
1095
1096 static NTSTATUS pdb_default_getsampwsid(struct pdb_methods *my_methods, SAM_ACCOUNT * user, const DOM_SID *sid)
1097 {
1098         return NT_STATUS_NO_SUCH_USER;
1099 }
1100
1101 static NTSTATUS pdb_default_add_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
1102 {
1103         DEBUG(0,("this backend (%s) should not be listed as the first passdb backend! You can't add users to it.\n", methods->name));
1104         return NT_STATUS_NOT_IMPLEMENTED;
1105 }
1106
1107 static NTSTATUS pdb_default_update_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
1108 {
1109         return NT_STATUS_NOT_IMPLEMENTED;
1110 }
1111
1112 static NTSTATUS pdb_default_delete_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *pwd)
1113 {
1114         return NT_STATUS_NOT_IMPLEMENTED;
1115 }
1116
1117 static NTSTATUS pdb_default_setsampwent(struct pdb_methods *methods, BOOL update)
1118 {
1119         return NT_STATUS_NOT_IMPLEMENTED;
1120 }
1121
1122 static NTSTATUS pdb_default_getsampwent(struct pdb_methods *methods, SAM_ACCOUNT *user)
1123 {
1124         return NT_STATUS_NOT_IMPLEMENTED;
1125 }
1126
1127 static void pdb_default_endsampwent(struct pdb_methods *methods)
1128 {
1129         return; /* NT_STATUS_NOT_IMPLEMENTED; */
1130 }
1131
1132 static NTSTATUS pdb_default_gettrustpwent(struct pdb_methods *methods, SAM_TRUST_PASSWD* trust)
1133 {
1134         return NT_STATUS_NOT_IMPLEMENTED;
1135 }
1136
1137 static NTSTATUS pdb_default_gettrustpwsid(struct pdb_methods *methods, SAM_TRUST_PASSWD* trust,
1138                                           const DOM_SID* sid)
1139 {
1140         return NT_STATUS_NOT_IMPLEMENTED;
1141 }
1142
1143 static NTSTATUS pdb_default_add_trust_passwd(struct pdb_methods *methods, const SAM_TRUST_PASSWD* trust)
1144 {
1145         return NT_STATUS_NOT_IMPLEMENTED;
1146 }
1147
1148 static NTSTATUS pdb_default_update_trust_passwd(struct pdb_methods *methods, const SAM_TRUST_PASSWD* trust)
1149 {
1150         return NT_STATUS_NOT_IMPLEMENTED;
1151 }
1152
1153 static NTSTATUS pdb_default_delete_trust_passwd(struct pdb_methods *methods, const SAM_TRUST_PASSWD* trust)
1154 {
1155         return NT_STATUS_NOT_IMPLEMENTED;
1156 }
1157
1158
1159 NTSTATUS make_pdb_methods(TALLOC_CTX *mem_ctx, PDB_METHODS **methods)
1160 {
1161         *methods = talloc(mem_ctx, sizeof(struct pdb_methods));
1162
1163         if (!*methods) {
1164                 return NT_STATUS_NO_MEMORY;
1165         }
1166
1167         ZERO_STRUCTP(*methods);
1168
1169         (*methods)->setsampwent = pdb_default_setsampwent;
1170         (*methods)->endsampwent = pdb_default_endsampwent;
1171         (*methods)->getsampwent = pdb_default_getsampwent;
1172         (*methods)->getsampwnam = pdb_default_getsampwnam;
1173         (*methods)->getsampwsid = pdb_default_getsampwsid;
1174         (*methods)->add_sam_account = pdb_default_add_sam_account;
1175         (*methods)->update_sam_account = pdb_default_update_sam_account;
1176         (*methods)->delete_sam_account = pdb_default_delete_sam_account;
1177
1178         (*methods)->getgrsid = pdb_default_getgrsid;
1179         (*methods)->getgrgid = pdb_default_getgrgid;
1180         (*methods)->getgrnam = pdb_default_getgrnam;
1181         (*methods)->add_group_mapping_entry = pdb_default_add_group_mapping_entry;
1182         (*methods)->update_group_mapping_entry = pdb_default_update_group_mapping_entry;
1183         (*methods)->delete_group_mapping_entry = pdb_default_delete_group_mapping_entry;
1184         (*methods)->enum_group_mapping = pdb_default_enum_group_mapping;
1185         (*methods)->add_aliasmem = pdb_default_add_aliasmem;
1186         (*methods)->del_aliasmem = pdb_default_del_aliasmem;
1187         (*methods)->enum_aliasmem = pdb_default_enum_aliasmem;
1188         (*methods)->enum_alias_memberships = pdb_default_alias_memberships;
1189
1190         (*methods)->gettrustpwent = pdb_default_gettrustpwent;
1191         (*methods)->gettrustpwsid = pdb_default_gettrustpwsid;
1192         (*methods)->add_trust_passwd = pdb_default_add_trust_passwd;
1193         (*methods)->update_trust_passwd = pdb_default_update_trust_passwd;
1194         (*methods)->delete_trust_passwd = pdb_default_delete_trust_passwd;
1195
1196         return NT_STATUS_OK;
1197 }