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
   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         const char *lm_pw, *nt_pw;
 236         uint16 acb_flags;
 237
 238         if ((!context) || (!context->pdb_methods)) {
 239                 DEBUG(0, ("invalid pdb_context specified!\n"));
 240                 return ret;
 241         }
 242
 243         /* disable acccounts with no passwords (that has not
 244            been allowed by the  ACB_PWNOTREQ bit */
 245
 246         lm_pw = pdb_get_lanman_passwd( sam_acct );
 247         nt_pw = pdb_get_nt_passwd( sam_acct );
 248         acb_flags = pdb_get_acct_ctrl( sam_acct );
 249         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 250                 acb_flags |= ACB_DISABLED;
 251                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 252         }
 253
 254         /** @todo  This is where a 're-read on add' should be done */
 255         /* We now add a new account to the first database listed.
 256          * Should we? */
 257
 258         return context->pdb_methods->add_sam_account(context->pdb_methods, sam_acct);
 259 }
 260
 261 static NTSTATUS context_update_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 262 {
 263         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 264         const char *lm_pw, *nt_pw;
 265         uint16 acb_flags;
 266
 267         if (!context) {
 268                 DEBUG(0, ("invalid pdb_context specified!\n"));
 269                 return ret;
 270         }
 271
 272         if (!sam_acct || !sam_acct->methods){
 273                 DEBUG(0, ("invalid sam_acct specified\n"));
 274                 return ret;
 275         }
 276
 277         /* disable acccounts with no passwords (that has not
 278            been allowed by the  ACB_PWNOTREQ bit */
 279
 280         lm_pw = pdb_get_lanman_passwd( sam_acct );
 281         nt_pw = pdb_get_nt_passwd( sam_acct );
 282         acb_flags = pdb_get_acct_ctrl( sam_acct );
 283         if ( !lm_pw && !nt_pw && !(acb_flags&ACB_PWNOTREQ) ) {
 284                 acb_flags |= ACB_DISABLED;
 285                 pdb_set_acct_ctrl( sam_acct, acb_flags, PDB_CHANGED );
 286         }
 287
 288         /** @todo  This is where a 're-read on update' should be done */
 289
 290         return sam_acct->methods->update_sam_account(sam_acct->methods, sam_acct);
 291 }
 292
 293 static NTSTATUS context_delete_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
 294 {
 295         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 296
 297         struct pdb_methods *pdb_selected;
 298         if (!context) {
 299                 DEBUG(0, ("invalid pdb_context specified!\n"));
 300                 return ret;
 301         }
 302
 303         if (!sam_acct->methods){
 304                 pdb_selected = context->pdb_methods;
 305                 /* There's no passdb backend specified for this account.
 306                  * Try to delete it in every passdb available
 307                  * Needed to delete accounts in smbpasswd that are not
 308                  * in /etc/passwd.
 309                  */
 310                 while (pdb_selected){
 311                         if (NT_STATUS_IS_OK(ret = pdb_selected->delete_sam_account(pdb_selected, sam_acct))) {
 312                                 return ret;
 313                         }
 314                         pdb_selected = pdb_selected->next;
 315                 }
 316                 return ret;
 317         }
 318
 319         if (!sam_acct->methods->delete_sam_account){
 320                 DEBUG(0,("invalid sam_acct->methods->delete_sam_account\n"));
 321                 return ret;
 322         }
 323
 324         return sam_acct->methods->delete_sam_account(sam_acct->methods, sam_acct);
 325 }
 326
 327 static NTSTATUS context_getgrsid(struct pdb_context *context,
 328                                  GROUP_MAP *map, DOM_SID sid)
 329 {
 330         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 331
 332         struct pdb_methods *curmethods;
 333         if ((!context)) {
 334                 DEBUG(0, ("invalid pdb_context specified!\n"));
 335                 return ret;
 336         }
 337         curmethods = context->pdb_methods;
 338         while (curmethods){
 339                 ret = curmethods->getgrsid(curmethods, map, sid);
 340                 if (NT_STATUS_IS_OK(ret)) {
 341                         map->methods = curmethods;
 342                         return ret;
 343                 }
 344                 curmethods = curmethods->next;
 345         }
 346
 347         return ret;
 348 }
 349
 350 static NTSTATUS context_getgrgid(struct pdb_context *context,
 351                                  GROUP_MAP *map, gid_t gid)
 352 {
 353         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 354
 355         struct pdb_methods *curmethods;
 356         if ((!context)) {
 357                 DEBUG(0, ("invalid pdb_context specified!\n"));
 358                 return ret;
 359         }
 360         curmethods = context->pdb_methods;
 361         while (curmethods){
 362                 ret = curmethods->getgrgid(curmethods, map, gid);
 363                 if (NT_STATUS_IS_OK(ret)) {
 364                         map->methods = curmethods;
 365                         return ret;
 366                 }
 367                 curmethods = curmethods->next;
 368         }
 369
 370         return ret;
 371 }
 372
 373 static NTSTATUS context_getgrnam(struct pdb_context *context,
 374                                  GROUP_MAP *map, const char *name)
 375 {
 376         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 377
 378         struct pdb_methods *curmethods;
 379         if ((!context)) {
 380                 DEBUG(0, ("invalid pdb_context specified!\n"));
 381                 return ret;
 382         }
 383         curmethods = context->pdb_methods;
 384         while (curmethods){
 385                 ret = curmethods->getgrnam(curmethods, map, name);
 386                 if (NT_STATUS_IS_OK(ret)) {
 387                         map->methods = curmethods;
 388                         return ret;
 389                 }
 390                 curmethods = curmethods->next;
 391         }
 392
 393         return ret;
 394 }
 395
 396 static NTSTATUS context_add_group_mapping_entry(struct pdb_context *context,
 397                                                 GROUP_MAP *map)
 398 {
 399         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 400
 401         if ((!context) || (!context->pdb_methods)) {
 402                 DEBUG(0, ("invalid pdb_context specified!\n"));
 403                 return ret;
 404         }
 405
 406         return context->pdb_methods->add_group_mapping_entry(context->pdb_methods,
 407                                                              map);
 408 }
 409
 410 static NTSTATUS context_update_group_mapping_entry(struct pdb_context *context,
 411                                                    GROUP_MAP *map)
 412 {
 413         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 414
 415         if ((!context) || (!context->pdb_methods)) {
 416                 DEBUG(0, ("invalid pdb_context specified!\n"));
 417                 return ret;
 418         }
 419
 420         return context->
 421                 pdb_methods->update_group_mapping_entry(context->pdb_methods, map);
 422 }
 423
 424 static NTSTATUS context_delete_group_mapping_entry(struct pdb_context *context,
 425                                                    DOM_SID sid)
 426 {
 427         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 428
 429         if ((!context) || (!context->pdb_methods)) {
 430                 DEBUG(0, ("invalid pdb_context specified!\n"));
 431                 return ret;
 432         }
 433
 434         return context->
 435                 pdb_methods->delete_group_mapping_entry(context->pdb_methods, sid);
 436 }
 437
 438 static NTSTATUS context_enum_group_mapping(struct pdb_context *context,
 439                                            enum SID_NAME_USE sid_name_use,
 440                                            GROUP_MAP **rmap, int *num_entries,
 441                                            BOOL unix_only)
 442 {
 443         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 444
 445         if ((!context) || (!context->pdb_methods)) {
 446                 DEBUG(0, ("invalid pdb_context specified!\n"));
 447                 return ret;
 448         }
 449
 450         return context->pdb_methods->enum_group_mapping(context->pdb_methods,
 451                                                         sid_name_use, rmap,
 452                                                         num_entries, unix_only);
 453 }
 454
 455 /******************************************************************
 456   Free and cleanup a pdb context, any associated data and anything
 457   that the attached modules might have associated.
 458  *******************************************************************/
 459
 460 static void free_pdb_context(struct pdb_context **context)
 461 {
 462         struct pdb_methods *pdb_selected = (*context)->pdb_methods;
 463
 464         while (pdb_selected){
 465                 if(pdb_selected->free_private_data)
 466                         pdb_selected->free_private_data(&(pdb_selected->private_data));
 467                 pdb_selected = pdb_selected->next;
 468         }
 469
 470         talloc_destroy((*context)->mem_ctx);
 471         *context = NULL;
 472 }
 473
 474 /******************************************************************
 475   Make a pdb_methods from scratch
 476  *******************************************************************/
 477
 478 static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_context *context, const char *selected)
 479 {
 480         char *module_name = smb_xstrdup(selected);
 481         char *module_location = NULL, *p;
 482         struct pdb_init_function_entry *entry;
 483         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 484
 485         lazy_initialize_passdb();
 486
 487         p = strchr(module_name, ':');
 488
 489         if (p) {
 490                 *p = 0;
 491                 module_location = p+1;
 492                 trim_char(module_location, ' ', ' ');
 493         }
 494
 495         trim_char(module_name, ' ', ' ');
 496
 497
 498         DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
 499
 500         entry = pdb_find_backend_entry(module_name);
 501
 502         /* Try to find a module that contains this module */
 503         if (!entry) {
 504                 DEBUG(2,("No builtin backend found, trying to load plugin\n"));
 505                 if(NT_STATUS_IS_OK(smb_probe_module("pdb", module_name)) && !(entry = pdb_find_backend_entry(module_name))) {
 506                         DEBUG(0,("Plugin is available, but doesn't register passdb backend %s\n", module_name));
 507                         SAFE_FREE(module_name);
 508                         return NT_STATUS_UNSUCCESSFUL;
 509                 }
 510         }
 511
 512         /* No such backend found */
 513         if(!entry) {
 514                 DEBUG(0,("No builtin nor plugin backend for %s found\n", module_name));
 515                 SAFE_FREE(module_name);
 516                 return NT_STATUS_INVALID_PARAMETER;
 517         }
 518
 519         DEBUG(5,("Found pdb backend %s\n", module_name));
 520         nt_status = entry->init(context, methods, module_location);
 521         if (NT_STATUS_IS_OK(nt_status)) {
 522                 DEBUG(5,("pdb backend %s has a valid init\n", selected));
 523         } else {
 524                 DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
 525         }
 526         SAFE_FREE(module_name);
 527         return nt_status;
 528 }
 529
 530 /******************************************************************
 531   Make a pdb_context from scratch.
 532  *******************************************************************/
 533
 534 static NTSTATUS make_pdb_context(struct pdb_context **context)
 535 {
 536         TALLOC_CTX *mem_ctx;
 537
 538         mem_ctx = talloc_init("pdb_context internal allocation context");
 539
 540         if (!mem_ctx) {
 541                 DEBUG(0, ("make_pdb_context: talloc init failed!\n"));
 542                 return NT_STATUS_NO_MEMORY;
 543         }
 544
 545         *context = talloc(mem_ctx, sizeof(**context));
 546         if (!*context) {
 547                 DEBUG(0, ("make_pdb_context: talloc failed!\n"));
 548                 return NT_STATUS_NO_MEMORY;
 549         }
 550
 551         ZERO_STRUCTP(*context);
 552
 553         (*context)->mem_ctx = mem_ctx;
 554
 555         (*context)->pdb_setsampwent = context_setsampwent;
 556         (*context)->pdb_endsampwent = context_endsampwent;
 557         (*context)->pdb_getsampwent = context_getsampwent;
 558         (*context)->pdb_getsampwnam = context_getsampwnam;
 559         (*context)->pdb_getsampwsid = context_getsampwsid;
 560         (*context)->pdb_add_sam_account = context_add_sam_account;
 561         (*context)->pdb_update_sam_account = context_update_sam_account;
 562         (*context)->pdb_delete_sam_account = context_delete_sam_account;
 563         (*context)->pdb_getgrsid = context_getgrsid;
 564         (*context)->pdb_getgrgid = context_getgrgid;
 565         (*context)->pdb_getgrnam = context_getgrnam;
 566         (*context)->pdb_add_group_mapping_entry = context_add_group_mapping_entry;
 567         (*context)->pdb_update_group_mapping_entry = context_update_group_mapping_entry;
 568         (*context)->pdb_delete_group_mapping_entry = context_delete_group_mapping_entry;
 569         (*context)->pdb_enum_group_mapping = context_enum_group_mapping;
 570
 571         (*context)->free_fn = free_pdb_context;
 572
 573         return NT_STATUS_OK;
 574 }
 575
 576
 577 /******************************************************************
 578   Make a pdb_context, given an array of strings
 579  *******************************************************************/
 580
 581 NTSTATUS make_pdb_context_list(struct pdb_context **context, const char **selected)
 582 {
 583         int i = 0;
 584         struct pdb_methods *curmethods, *tmpmethods;
 585         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 586         BOOL have_guest = False;
 587
 588         if (!NT_STATUS_IS_OK(nt_status = make_pdb_context(context))) {
 589                 return nt_status;
 590         }
 591
 592         if (!selected) {
 593                 DEBUG(0, ("ERROR: empty passdb backend list!\n"));
 594                 return nt_status;
 595         }
 596
 597         while (selected[i]){
 598                 if (strcmp(selected[i], "guest") == 0) {
 599                         have_guest = True;
 600                 }
 601                 /* Try to initialise pdb */
 602                 DEBUG(5,("Trying to load: %s\n", selected[i]));
 603                 if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods, *context, selected[i]))) {
 604                         DEBUG(1, ("Loading %s failed!\n", selected[i]));
 605                         free_pdb_context(context);
 606                         return nt_status;
 607                 }
 608                 curmethods->parent = *context;
 609                 DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 610                 i++;
 611         }
 612
 613         if (have_guest)
 614                 return NT_STATUS_OK;
 615
 616         if ( (lp_guestaccount() == NULL) ||
 617              (*lp_guestaccount() == '\0') ) {
 618                 /* We explicitly don't want guest access. No idea what
 619                    else that breaks, but be it that way. */
 620                 return NT_STATUS_OK;
 621         }
 622
 623         if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods,
 624                                                                *context,
 625                                                                "guest"))) {
 626                 DEBUG(1, ("Loading guest module failed!\n"));
 627                 free_pdb_context(context);
 628                 return nt_status;
 629         }
 630
 631         curmethods->parent = *context;
 632         DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
 633
 634         return NT_STATUS_OK;
 635 }
 636
 637 /******************************************************************
 638   Make a pdb_context, given a text string.
 639  *******************************************************************/
 640
 641 NTSTATUS make_pdb_context_string(struct pdb_context **context, const char *selected)
 642 {
 643         NTSTATUS ret;
 644         char **newsel = str_list_make(selected, NULL);
 645         ret = make_pdb_context_list(context, (const char **)newsel);
 646         str_list_free(&newsel);
 647         return ret;
 648 }
 649
 650 /******************************************************************
 651  Return an already initialised pdb_context, to facilitate backward
 652  compatibility (see functions below).
 653 *******************************************************************/
 654
 655 static struct pdb_context *pdb_get_static_context(BOOL reload)
 656 {
 657         static struct pdb_context *pdb_context = NULL;
 658
 659         if ((pdb_context) && (reload)) {
 660                 pdb_context->free_fn(&pdb_context);
 661                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 662                         return NULL;
 663                 }
 664         }
 665
 666         if (!pdb_context) {
 667                 if (!NT_STATUS_IS_OK(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
 668                         return NULL;
 669                 }
 670         }
 671
 672         return pdb_context;
 673 }
 674
 675 /******************************************************************
 676  Backward compatibility functions for the original passdb interface
 677 *******************************************************************/
 678
 679 BOOL pdb_setsampwent(BOOL update)
 680 {
 681         struct pdb_context *pdb_context = pdb_get_static_context(False);
 682
 683         if (!pdb_context) {
 684                 return False;
 685         }
 686
 687         return NT_STATUS_IS_OK(pdb_context->pdb_setsampwent(pdb_context, update));
 688 }
 689
 690 void pdb_endsampwent(void)
 691 {
 692         struct pdb_context *pdb_context = pdb_get_static_context(False);
 693
 694         if (!pdb_context) {
 695                 return;
 696         }
 697
 698         pdb_context->pdb_endsampwent(pdb_context);
 699 }
 700
 701 BOOL pdb_getsampwent(SAM_ACCOUNT *user)
 702 {
 703         struct pdb_context *pdb_context = pdb_get_static_context(False);
 704
 705         if (!pdb_context) {
 706                 return False;
 707         }
 708
 709         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwent(pdb_context, user));
 710 }
 711
 712 BOOL pdb_getsampwnam(SAM_ACCOUNT *sam_acct, const char *username)
 713 {
 714         struct pdb_context *pdb_context = pdb_get_static_context(False);
 715
 716         if (!pdb_context) {
 717                 return False;
 718         }
 719
 720         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwnam(pdb_context, sam_acct, username));
 721 }
 722
 723 BOOL pdb_getsampwsid(SAM_ACCOUNT *sam_acct, const DOM_SID *sid)
 724 {
 725         struct pdb_context *pdb_context = pdb_get_static_context(False);
 726
 727         if (!pdb_context) {
 728                 return False;
 729         }
 730
 731         return NT_STATUS_IS_OK(pdb_context->pdb_getsampwsid(pdb_context, sam_acct, sid));
 732 }
 733
 734 BOOL pdb_add_sam_account(SAM_ACCOUNT *sam_acct)
 735 {
 736         struct pdb_context *pdb_context = pdb_get_static_context(False);
 737
 738         if (!pdb_context) {
 739                 return False;
 740         }
 741
 742         return NT_STATUS_IS_OK(pdb_context->pdb_add_sam_account(pdb_context, sam_acct));
 743 }
 744
 745 BOOL pdb_update_sam_account(SAM_ACCOUNT *sam_acct)
 746 {
 747         struct pdb_context *pdb_context = pdb_get_static_context(False);
 748
 749         if (!pdb_context) {
 750                 return False;
 751         }
 752
 753         return NT_STATUS_IS_OK(pdb_context->pdb_update_sam_account(pdb_context, sam_acct));
 754 }
 755
 756 BOOL pdb_delete_sam_account(SAM_ACCOUNT *sam_acct)
 757 {
 758         struct pdb_context *pdb_context = pdb_get_static_context(False);
 759
 760         if (!pdb_context) {
 761                 return False;
 762         }
 763
 764         return NT_STATUS_IS_OK(pdb_context->pdb_delete_sam_account(pdb_context, sam_acct));
 765 }
 766
 767 BOOL pdb_getgrsid(GROUP_MAP *map, DOM_SID sid)
 768 {
 769         struct pdb_context *pdb_context = pdb_get_static_context(False);
 770
 771         if (!pdb_context) {
 772                 return False;
 773         }
 774
 775         return NT_STATUS_IS_OK(pdb_context->
 776                                pdb_getgrsid(pdb_context, map, sid));
 777 }
 778
 779 BOOL pdb_getgrgid(GROUP_MAP *map, gid_t gid)
 780 {
 781         struct pdb_context *pdb_context = pdb_get_static_context(False);
 782
 783         if (!pdb_context) {
 784                 return False;
 785         }
 786
 787         return NT_STATUS_IS_OK(pdb_context->
 788                                pdb_getgrgid(pdb_context, map, gid));
 789 }
 790
 791 BOOL pdb_getgrnam(GROUP_MAP *map, const char *name)
 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->
 800                                pdb_getgrnam(pdb_context, map, name));
 801 }
 802
 803 BOOL pdb_add_group_mapping_entry(GROUP_MAP *map)
 804 {
 805         struct pdb_context *pdb_context = pdb_get_static_context(False);
 806
 807         if (!pdb_context) {
 808                 return False;
 809         }
 810
 811         return NT_STATUS_IS_OK(pdb_context->
 812                                pdb_add_group_mapping_entry(pdb_context, map));
 813 }
 814
 815 BOOL pdb_update_group_mapping_entry(GROUP_MAP *map)
 816 {
 817         struct pdb_context *pdb_context = pdb_get_static_context(False);
 818
 819         if (!pdb_context) {
 820                 return False;
 821         }
 822
 823         return NT_STATUS_IS_OK(pdb_context->
 824                                pdb_update_group_mapping_entry(pdb_context, map));
 825 }
 826
 827 BOOL pdb_delete_group_mapping_entry(DOM_SID sid)
 828 {
 829         struct pdb_context *pdb_context = pdb_get_static_context(False);
 830
 831         if (!pdb_context) {
 832                 return False;
 833         }
 834
 835         return NT_STATUS_IS_OK(pdb_context->
 836                                pdb_delete_group_mapping_entry(pdb_context, sid));
 837 }
 838
 839 BOOL pdb_enum_group_mapping(enum SID_NAME_USE sid_name_use, GROUP_MAP **rmap,
 840                             int *num_entries, BOOL unix_only)
 841 {
 842         struct pdb_context *pdb_context = pdb_get_static_context(False);
 843
 844         if (!pdb_context) {
 845                 return False;
 846         }
 847
 848         return NT_STATUS_IS_OK(pdb_context->
 849                                pdb_enum_group_mapping(pdb_context, sid_name_use,
 850                                                       rmap, num_entries, unix_only));
 851 }
 852
 853 /***************************************************************
 854   Initialize the static context (at smbd startup etc).
 855
 856   If uninitialised, context will auto-init on first use.
 857  ***************************************************************/
 858
 859 BOOL initialize_password_db(BOOL reload)
 860 {
 861         return (pdb_get_static_context(reload) != NULL);
 862 }
 863
 864
 865 /***************************************************************************
 866   Default implementations of some functions.
 867  ****************************************************************************/
 868
 869 static NTSTATUS pdb_default_getsampwnam (struct pdb_methods *methods, SAM_ACCOUNT *user, const char *sname)
 870 {
 871         return NT_STATUS_NO_SUCH_USER;
 872 }
 873
 874 static NTSTATUS pdb_default_getsampwsid(struct pdb_methods *my_methods, SAM_ACCOUNT * user, const DOM_SID *sid)
 875 {
 876         return NT_STATUS_NO_SUCH_USER;
 877 }
 878
 879 static NTSTATUS pdb_default_add_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
 880 {
 881         DEBUG(0,("this backend (%s) should not be listed as the first passdb backend! You can't add users to it.\n", methods->name));
 882         return NT_STATUS_NOT_IMPLEMENTED;
 883 }
 884
 885 static NTSTATUS pdb_default_update_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
 886 {
 887         return NT_STATUS_NOT_IMPLEMENTED;
 888 }
 889
 890 static NTSTATUS pdb_default_delete_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *pwd)
 891 {
 892         return NT_STATUS_NOT_IMPLEMENTED;
 893 }
 894
 895 static NTSTATUS pdb_default_setsampwent(struct pdb_methods *methods, BOOL update)
 896 {
 897         return NT_STATUS_NOT_IMPLEMENTED;
 898 }
 899
 900 static NTSTATUS pdb_default_getsampwent(struct pdb_methods *methods, SAM_ACCOUNT *user)
 901 {
 902         return NT_STATUS_NOT_IMPLEMENTED;
 903 }
 904
 905 static void pdb_default_endsampwent(struct pdb_methods *methods)
 906 {
 907         return; /* NT_STATUS_NOT_IMPLEMENTED; */
 908 }
 909
 910 NTSTATUS make_pdb_methods(TALLOC_CTX *mem_ctx, PDB_METHODS **methods)
 911 {
 912         *methods = talloc(mem_ctx, sizeof(struct pdb_methods));
 913
 914         if (!*methods) {
 915                 return NT_STATUS_NO_MEMORY;
 916         }
 917
 918         ZERO_STRUCTP(*methods);
 919
 920         (*methods)->setsampwent = pdb_default_setsampwent;
 921         (*methods)->endsampwent = pdb_default_endsampwent;
 922         (*methods)->getsampwent = pdb_default_getsampwent;
 923         (*methods)->getsampwnam = pdb_default_getsampwnam;
 924         (*methods)->getsampwsid = pdb_default_getsampwsid;
 925         (*methods)->add_sam_account = pdb_default_add_sam_account;
 926         (*methods)->update_sam_account = pdb_default_update_sam_account;
 927         (*methods)->delete_sam_account = pdb_default_delete_sam_account;
 928
 929         (*methods)->getgrsid = pdb_default_getgrsid;
 930         (*methods)->getgrgid = pdb_default_getgrgid;
 931         (*methods)->getgrnam = pdb_default_getgrnam;
 932         (*methods)->add_group_mapping_entry = pdb_default_add_group_mapping_entry;
 933         (*methods)->update_group_mapping_entry = pdb_default_update_group_mapping_entry;
 934         (*methods)->delete_group_mapping_entry = pdb_default_delete_group_mapping_entry;
 935         (*methods)->enum_group_mapping = pdb_default_enum_group_mapping;
 936
 937         return NT_STATUS_OK;
 938 }