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_gettrustpwent(struct pdb_context *context,
 430                                       SAM_TRUST_PASSWD *trust)
 431 {
 432         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 433         struct pdb_methods *cur_methods;
 434
 435         if (!context) {
 436                 DEBUG(0, ("invalid pdb_context specified!\n"));
 437                 return ret;
 438         }
 439
 440         cur_methods = context->pdb_methods;
 441
 442         while (cur_methods) {
 443                 ret = cur_methods->gettrustpwent(cur_methods, trust);
 444                 if (NT_STATUS_IS_OK(ret)) {
 445                         trust->methods = cur_methods;
 446                         return ret;
 447                 }
 448                 cur_methods = cur_methods->next;
 449         }
 450
 451         return ret;
 452 }
 453
 454 static NTSTATUS context_gettrustpwsid(struct pdb_context *context,
 455                                       SAM_TRUST_PASSWD *trust,
 456                                       const DOM_SID *sid)
 457 {
 458         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 459         struct pdb_methods *cur_methods;
 460
 461         if (!context) {
 462                 DEBUG(0, ("invalid pdb_context specified!\n"));
 463                 return ret;
 464         }
 465
 466         cur_methods = context->pdb_methods;
 467
 468         while (cur_methods) {
 469                 ret = cur_methods->gettrustpwsid(cur_methods, trust, sid);
 470                 if (NT_STATUS_IS_OK(ret)) {
 471                         trust->methods = cur_methods;
 472                         return ret;
 473                 }
 474                 cur_methods = cur_methods->next;
 475         }
 476
 477         return ret;
 478 }
 479
 480 static NTSTATUS context_add_trust_passwd(struct pdb_context *context,
 481                                          SAM_TRUST_PASSWD *trust)
 482 {
 483         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 484
 485         if (!context) {
 486                 DEBUG(0, ("invalid pdb_context specified!\n"));
 487                 return ret;
 488         }
 489
 490         return context->pdb_methods->add_trust_passwd(context->pdb_methods, trust);
 491 }
 492
 493 static NTSTATUS context_update_trust_passwd(struct pdb_context *context,
 494                                             SAM_TRUST_PASSWD *trust)
 495 {
 496         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 497
 498         if (!context) {
 499                 DEBUG(0, ("invalid pdb_context specified!\n"));
 500                 return ret;
 501         }
 502
 503         if (!trust || !trust->methods) {
 504                 DEBUG(0, ("invalid trust pointer specified!\n"));
 505                 return ret;
 506         }
 507
 508         return trust->methods->update_trust_passwd(trust->methods, trust);
 509 }
 510
 511 static NTSTATUS context_delete_trust_passwd(struct pdb_context *context,
 512                                             SAM_TRUST_PASSWD *trust)
 513 {
 514         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 515
 516         if (!context) {
 517                 DEBUG(0, ("invalid pdb_context specified!\n"));
 518                 return ret;
 519         }
 520
 521         if (!trust || !trust->methods) {
 522                 DEBUG(0, ("invalid trust pointer specified!\n"));
 523                 return ret;
 524         }
 525
 526         return trust->methods->delete_trust_passwd(trust->methods, trust);
 527 }
 528
 529 /******************************************************************
 530   Free and cleanup a pdb context, any associated data and anything
 531   that the attached modules might have associated.
 532  *******************************************************************/
 533
 534 static void free_pdb_context(struct pdb_context **context)
 535 {
 536         struct pdb_methods *pdb_selected = (*context)->pdb_methods;
 537
 538         while (pdb_selected){
 539                 if(pdb_selected->free_private_data)
 540                         pdb_selected->free_private_data(&(pdb_selected->private_data));
 541                 pdb_selected = pdb_selected->next;
 542         }
 543
 544         talloc_destroy((*context)->mem_ctx);
 545         *context = NULL;
 546 }
 547
 548 /******************************************************************
 549   Make a pdb_methods from scratch
 550  *******************************************************************/
 551
 552 static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_context *context, const char *selected)
 553 {
 554         char *module_name = smb_xstrdup(selected);
 555         char *module_location = NULL, *p;
 556         struct pdb_init_function_entry *entry;
 557         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 558
 559         lazy_initialize_passdb();
 560
 561         p = strchr(module_name, ':');
 562
 563         if (p) {
 564                 *p = 0;
 565                 module_location = p+1;
 566                 trim_char(module_location, ' ', ' ');
 567         }
 568
 569         trim_char(module_name, ' ', ' ');
 570
 571
 572         DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
 573
 574         entry = pdb_find_backend_entry(module_name);
 575
 576         /* Try to find a module that contains this module */
 577         if (!entry) {
 578                 DEBUG(2,("No builtin backend found, trying to load plugin\n"));
 579                 if(NT_STATUS_IS_OK(smb_probe_module("pdb", module_name)) && !(entry = pdb_find_backend_entry(module_name))) {
 580                         DEBUG(0,("Plugin is available, but doesn't register passdb backend %s\n", module_name));
 581                         SAFE_FREE(module_name);
 582                         return NT_STATUS_UNSUCCESSFUL;
 583                 }
 584         }
 585
 586         /* No such backend found */
 587         if(!entry) {
 588                 DEBUG(0,("No builtin nor plugin backend for %s found\n", module_name));
 589                 SAFE_FREE(module_name);
 590                 return NT_STATUS_INVALID_PARAMETER;
 591         }
 592
 593         DEBUG(5,("Found pdb backend %s\n", module_name));
 594         nt_status = entry->init(context, methods, module_location);
 595         if (NT_STATUS_IS_OK(nt_status)) {
 596                 DEBUG(5,("pdb backend %s has a valid init\n", selected));
 597         } else {
 598                 DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
 599         }
 600         SAFE_FREE(module_name);
 601         return nt_status;
 602 }
 603
 604 /******************************************************************
 605   Make a pdb_context from scratch.
 606  *******************************************************************/
 607
 608 static NTSTATUS make_pdb_context(struct pdb_context **context)
 609 {
 610         TALLOC_CTX *mem_ctx;
 611
 612         mem_ctx = talloc_init("pdb_context internal allocation context");
 613
 614         if (!mem_ctx) {
 615                 DEBUG(0, ("make_pdb_context: talloc init failed!\n"));
 616                 return NT_STATUS_NO_MEMORY;
 617         }
 618
 619         *context = talloc(mem_ctx, sizeof(**context));
 620         if (!*context) {
 621                 DEBUG(0, ("make_pdb_context: talloc failed!\n"));
 622                 return NT_STATUS_NO_MEMORY;
 623         }
 624
 625         ZERO_STRUCTP(*context);
 626
 627         (*context)->mem_ctx = mem_ctx;
 628
 629         (*context)->pdb_setsampwent = context_setsampwent;
 630         (*context)->pdb_endsampwent = context_endsampwent;
 631         (*context)->pdb_getsampwent = context_getsampwent;
 632         (*context)->pdb_getsampwnam = context_getsampwnam;
 633         (*context)->pdb_getsampwsid = context_getsampwsid;
 634         (*context)->pdb_add_sam_account = context_add_sam_account;
 635         (*context)->pdb_update_sam_account = context_update_sam_account;
 636         (*context)->pdb_delete_sam_account = context_delete_sam_account;
 637         (*context)->pdb_getgrsid = context_getgrsid;
 638         (*context)->pdb_getgrgid = context_getgrgid;
 639         (*context)->pdb_getgrnam = context_getgrnam;
 640         (*context)->pdb_add_group_mapping_entry = context_add_group_mapping_entry;
 641         (*context)->pdb_update_group_mapping_entry = context_update_group_mapping_entry;
 642         (*context)->pdb_delete_group_mapping_entry = context_delete_group_mapping_entry;
 643         (*context)->pdb_enum_group_mapping = context_enum_group_mapping;
 644         (*context)->pdb_gettrustpwent = context_gettrustpwent;
 645         (*context)->pdb_gettrustpwsid = context_gettrustpwsid;
 646         (*context)->pdb_add_trust_passwd = context_add_trust_passwd;
 647         (*context)->pdb_update_trust_passwd = context_update_trust_passwd;
 648         (*context)->pdb_delete_trust_passwd = context_delete_trust_passwd;
 649
 650         (*context)->free_fn = free_pdb_context;
 651
 652         return NT_STATUS_OK;
 653 }
 654
 655
 656 /******************************************************************
 657   Make a pdb_context, given an array of strings
 658  *******************************************************************/
 659
 660 NTSTATUS make_pdb_context_list(struct pdb_context **context, const char **selected)
 661 {
 662         int i = 0;
 663         struct pdb_methods *curmethods, *tmpmethods;
 664         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 665         BOOL have_guest = False;
 666
 667         if (!NT_STATUS_IS_OK(nt_status = make_pdb_context(context))) {
 668                 return nt_status;
 669         }
 670
 671         if (!selected) {
 672                 DEBUG(0, ("ERROR: empty passdb backend list!\n"));
 673                 return nt_status;
 674         }
 675
 676         while (selected[i]){
 677                 if (strcmp(selected[i], "guest") == 0) {
 678                         have_guest = True;
 679                 }
 680                 /* Try to initialise pdb */
 681                 DEBUG(5,("Trying to load: %s\n", selected[i]));
 682                 if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods, *context, selected[i]))) {
 683                         DEBUG(1, ("Loading %s failed!\n", selected[i]));
 684                         free_pdb_context(context);
 685                         return nt_status;
 686                 }
 687                 curmethods->parent = *context;
 688                 DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 689                 i++;
 690         }
 691
 692         if (have_guest)
 693                 return NT_STATUS_OK;
 694
 695         if ( (lp_guestaccount() == NULL) ||
 696              (*lp_guestaccount() == '\0') ) {
 697                 /* We explicitly don't want guest access. No idea what
 698                    else that breaks, but be it that way. */
 699                 return NT_STATUS_OK;
 700         }
 701
 702         if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods,
 703                                                                *context,
 704                                                                "guest"))) {
 705                 DEBUG(1, ("Loading guest module failed!\n"));
 706                 free_pdb_context(context);
 707                 return nt_status;
 708         }
 709
 710         curmethods->parent = *context;
 711         DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 712
 713         return NT_STATUS_OK;
 714 }
 715
 716 /******************************************************************
 717   Make a pdb_context, given a text string.
 718  *******************************************************************/
 719
 720 NTSTATUS make_pdb_context_string(struct pdb_context **context, const char *selected)
 721 {
 722         NTSTATUS ret;
 723         char **newsel = str_list_make(selected, NULL);
 724         ret = make_pdb_context_list(context, (const char **)newsel);
 725         str_list_free(&newsel);
 726         return ret;
 727 }
 728
 729 /******************************************************************
 730  Return an already initialised pdb_context, to facilitate backward
 731  compatibility (see functions below).
 732 *******************************************************************/
 733
 734 static struct pdb_context *pdb_get_static_context(BOOL reload)
 735 {
 736         static struct pdb_context *pdb_context = NULL;
 737
 738         if ((pdb_context) && (reload)) {
 739                 pdb_context->free_fn(&pdb_context);
 740                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 741                         return NULL;
 742                 }
 743         }
 744
 745         if (!pdb_context) {
 746                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 747                         return NULL;
 748                 }
 749         }
 750
 751         return pdb_context;
 752 }
 753
 754 /******************************************************************
 755  Backward compatibility functions for the original passdb interface
 756 *******************************************************************/
 757
 758 BOOL pdb_setsampwent(BOOL update)
 759 {
 760         struct pdb_context *pdb_context = pdb_get_static_context(False);
 761
 762         if (!pdb_context) {
 763                 return False;
 764         }
 765
 766         return NT_STATUS_IS_OK(pdb_context->pdb_setsampwent(pdb_context, update));
 767 }
 768
 769 void pdb_endsampwent(void)
 770 {
 771         struct pdb_context *pdb_context = pdb_get_static_context(False);
 772
 773         if (!pdb_context) {
 774                 return;
 775         }
 776
 777         pdb_context->pdb_endsampwent(pdb_context);
 778 }
 779
 780 BOOL pdb_getsampwent(SAM_ACCOUNT *user)
 781 {
 782         struct pdb_context *pdb_context = pdb_get_static_context(False);
 783
 784         if (!pdb_context) {
 785                 return False;
 786         }
 787
 788         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwent(pdb_context, user));
 789 }
 790
 791 BOOL pdb_getsampwnam(SAM_ACCOUNT *sam_acct, const char *username)
 792 {
 793         struct pdb_context *pdb_context = pdb_get_static_context(False);
 794
 795         if (!pdb_context) {
 796                 return False;
 797         }
 798
 799         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwnam(pdb_context, sam_acct, username));
 800 }
 801
 802 BOOL pdb_getsampwsid(SAM_ACCOUNT *sam_acct, const DOM_SID *sid)
 803 {
 804         struct pdb_context *pdb_context = pdb_get_static_context(False);
 805
 806         if (!pdb_context) {
 807                 return False;
 808         }
 809
 810         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwsid(pdb_context, sam_acct, sid));
 811 }
 812
 813 BOOL pdb_add_sam_account(SAM_ACCOUNT *sam_acct)
 814 {
 815         struct pdb_context *pdb_context = pdb_get_static_context(False);
 816         const char *lm_pw, *nt_pw;
 817         uint16 acb_flags;
 818
 819         if (!pdb_context) {
 820                 return False;
 821         }
 822
 823         /* disable acccounts with no passwords (that has not
 824            been allowed by the  ACB_PWNOTREQ bit */
 825
 826         lm_pw = pdb_get_lanman_passwd( sam_acct );
 827         nt_pw = pdb_get_nt_passwd( sam_acct );
 828         acb_flags = pdb_get_acct_ctrl( sam_acct );
 829         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 830                 acb_flags |= ACB_DISABLED;
 831                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 832         }
 833
 834         return NT_STATUS_IS_OK(pdb_context->pdb_add_sam_account(pdb_context, sam_acct));
 835 }
 836
 837 BOOL pdb_update_sam_account(SAM_ACCOUNT *sam_acct)
 838 {
 839         struct pdb_context *pdb_context = pdb_get_static_context(False);
 840         const char *lm_pw, *nt_pw;
 841         uint16 acb_flags;
 842
 843         if (!pdb_context) {
 844                 return False;
 845         }
 846
 847         /* disable acccounts with no passwords (that has not
 848            been allowed by the  ACB_PWNOTREQ bit */
 849
 850         lm_pw = pdb_get_lanman_passwd( sam_acct );
 851         nt_pw = pdb_get_nt_passwd( sam_acct );
 852         acb_flags = pdb_get_acct_ctrl( sam_acct );
 853         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 854                 acb_flags |= ACB_DISABLED;
 855                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 856         }
 857
 858         return NT_STATUS_IS_OK(pdb_context->pdb_update_sam_account(pdb_context, sam_acct));
 859 }
 860
 861 BOOL pdb_delete_sam_account(SAM_ACCOUNT *sam_acct)
 862 {
 863         struct pdb_context *pdb_context = pdb_get_static_context(False);
 864
 865         if (!pdb_context) {
 866                 return False;
 867         }
 868
 869         return NT_STATUS_IS_OK(pdb_context->pdb_delete_sam_account(pdb_context, sam_acct));
 870 }
 871
 872 BOOL pdb_getgrsid(GROUP_MAP *map, DOM_SID sid)
 873 {
 874         struct pdb_context *pdb_context = pdb_get_static_context(False);
 875
 876         if (!pdb_context) {
 877                 return False;
 878         }
 879
 880         return NT_STATUS_IS_OK(pdb_context->
 881                                pdb_getgrsid(pdb_context, map, sid));
 882 }
 883
 884 BOOL pdb_getgrgid(GROUP_MAP *map, gid_t gid)
 885 {
 886         struct pdb_context *pdb_context = pdb_get_static_context(False);
 887
 888         if (!pdb_context) {
 889                 return False;
 890         }
 891
 892         return NT_STATUS_IS_OK(pdb_context->
 893                                pdb_getgrgid(pdb_context, map, gid));
 894 }
 895
 896 BOOL pdb_getgrnam(GROUP_MAP *map, const char *name)
 897 {
 898         struct pdb_context *pdb_context = pdb_get_static_context(False);
 899
 900         if (!pdb_context) {
 901                 return False;
 902         }
 903
 904         return NT_STATUS_IS_OK(pdb_context->
 905                                pdb_getgrnam(pdb_context, map, name));
 906 }
 907
 908 BOOL pdb_add_group_mapping_entry(GROUP_MAP *map)
 909 {
 910         struct pdb_context *pdb_context = pdb_get_static_context(False);
 911
 912         if (!pdb_context) {
 913                 return False;
 914         }
 915
 916         return NT_STATUS_IS_OK(pdb_context->
 917                                pdb_add_group_mapping_entry(pdb_context, map));
 918 }
 919
 920 BOOL pdb_update_group_mapping_entry(GROUP_MAP *map)
 921 {
 922         struct pdb_context *pdb_context = pdb_get_static_context(False);
 923
 924         if (!pdb_context) {
 925                 return False;
 926         }
 927
 928         return NT_STATUS_IS_OK(pdb_context->
 929                                pdb_update_group_mapping_entry(pdb_context, map));
 930 }
 931
 932 BOOL pdb_delete_group_mapping_entry(DOM_SID sid)
 933 {
 934         struct pdb_context *pdb_context = pdb_get_static_context(False);
 935
 936         if (!pdb_context) {
 937                 return False;
 938         }
 939
 940         return NT_STATUS_IS_OK(pdb_context->
 941                                pdb_delete_group_mapping_entry(pdb_context, sid));
 942 }
 943
 944 BOOL pdb_enum_group_mapping(enum SID_NAME_USE sid_name_use, GROUP_MAP **rmap,
 945                             int *num_entries, BOOL unix_only)
 946 {
 947         struct pdb_context *pdb_context = pdb_get_static_context(False);
 948
 949         if (!pdb_context) {
 950                 return False;
 951         }
 952
 953         return NT_STATUS_IS_OK(pdb_context->
 954                                pdb_enum_group_mapping(pdb_context, sid_name_use,
 955                                                       rmap, num_entries, unix_only));
 956 }
 957
 958 /***************************************************************
 959   Initialize the static context (at smbd startup etc).
 960
 961   If uninitialised, context will auto-init on first use.
 962  ***************************************************************/
 963
 964 BOOL initialize_password_db(BOOL reload)
 965 {
 966         return (pdb_get_static_context(reload) != NULL);
 967 }
 968
 969
 970 /***************************************************************************
 971   Default implementations of some functions.
 972  ****************************************************************************/
 973
 974 static NTSTATUS pdb_default_getsampwnam (struct pdb_methods *methods, SAM_ACCOUNT *user, const char *sname)
 975 {
 976         return NT_STATUS_NO_SUCH_USER;
 977 }
 978
 979 static NTSTATUS pdb_default_getsampwsid(struct pdb_methods *my_methods, SAM_ACCOUNT * user, const DOM_SID *sid)
 980 {
 981         return NT_STATUS_NO_SUCH_USER;
 982 }
 983
 984 static NTSTATUS pdb_default_add_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
 985 {
 986         DEBUG(0,("this backend (%s) should not be listed as the first passdb backend! You can't add users to it.\n", methods->name));
 987         return NT_STATUS_NOT_IMPLEMENTED;
 988 }
 989
 990 static NTSTATUS pdb_default_update_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
 991 {
 992         return NT_STATUS_NOT_IMPLEMENTED;
 993 }
 994
 995 static NTSTATUS pdb_default_delete_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *pwd)
 996 {
 997         return NT_STATUS_NOT_IMPLEMENTED;
 998 }
 999
1000 static NTSTATUS pdb_default_setsampwent(struct pdb_methods *methods, BOOL update)
1001 {
1002         return NT_STATUS_NOT_IMPLEMENTED;
1003 }
1004
1005 static NTSTATUS pdb_default_getsampwent(struct pdb_methods *methods, SAM_ACCOUNT *user)
1006 {
1007         return NT_STATUS_NOT_IMPLEMENTED;
1008 }
1009
1010 static void pdb_default_endsampwent(struct pdb_methods *methods)
1011 {
1012         return; /* NT_STATUS_NOT_IMPLEMENTED; */
1013 }
1014
1015 static NTSTATUS pdb_default_gettrustpwent(struct pdb_methods *methods, SAM_TRUST_PASSWD* trust)
1016 {
1017         return NT_STATUS_NOT_IMPLEMENTED;
1018 }
1019
1020 static NTSTATUS pdb_default_gettrustpwsid(struct pdb_methods *methods, SAM_TRUST_PASSWD* trust,
1021                                           const DOM_SID* sid)
1022 {
1023         return NT_STATUS_NOT_IMPLEMENTED;
1024 }
1025
1026 static NTSTATUS pdb_default_add_trust_passwd(struct pdb_methods *methods, const SAM_TRUST_PASSWD* trust)
1027 {
1028         return NT_STATUS_NOT_IMPLEMENTED;
1029 }
1030
1031 static NTSTATUS pdb_default_update_trust_passwd(struct pdb_methods *methods, const SAM_TRUST_PASSWD* trust)
1032 {
1033         return NT_STATUS_NOT_IMPLEMENTED;
1034 }
1035
1036 static NTSTATUS pdb_default_delete_trust_passwd(struct pdb_methods *methods, const SAM_TRUST_PASSWD* trust)
1037 {
1038         return NT_STATUS_NOT_IMPLEMENTED;
1039 }
1040
1041
1042 NTSTATUS make_pdb_methods(TALLOC_CTX *mem_ctx, PDB_METHODS **methods)
1043 {
1044         *methods = talloc(mem_ctx, sizeof(struct pdb_methods));
1045
1046         if (!*methods) {
1047                 return NT_STATUS_NO_MEMORY;
1048         }
1049
1050         ZERO_STRUCTP(*methods);
1051
1052         (*methods)->setsampwent = pdb_default_setsampwent;
1053         (*methods)->endsampwent = pdb_default_endsampwent;
1054         (*methods)->getsampwent = pdb_default_getsampwent;
1055         (*methods)->getsampwnam = pdb_default_getsampwnam;
1056         (*methods)->getsampwsid = pdb_default_getsampwsid;
1057         (*methods)->add_sam_account = pdb_default_add_sam_account;
1058         (*methods)->update_sam_account = pdb_default_update_sam_account;
1059         (*methods)->delete_sam_account = pdb_default_delete_sam_account;
1060
1061         (*methods)->getgrsid = pdb_default_getgrsid;
1062         (*methods)->getgrgid = pdb_default_getgrgid;
1063         (*methods)->getgrnam = pdb_default_getgrnam;
1064         (*methods)->add_group_mapping_entry = pdb_default_add_group_mapping_entry;
1065         (*methods)->update_group_mapping_entry = pdb_default_update_group_mapping_entry;
1066         (*methods)->delete_group_mapping_entry = pdb_default_delete_group_mapping_entry;
1067         (*methods)->enum_group_mapping = pdb_default_enum_group_mapping;
1068
1069         (*methods)->gettrustpwent = pdb_default_gettrustpwent;
1070         (*methods)->gettrustpwsid = pdb_default_gettrustpwsid;
1071         (*methods)->add_trust_passwd = pdb_default_add_trust_passwd;
1072         (*methods)->update_trust_passwd = pdb_default_update_trust_passwd;
1073         (*methods)->delete_trust_passwd = pdb_default_delete_trust_passwd;
1074
1075         return NT_STATUS_OK;
1076 }