source3/passdb/pdb_interface.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Bartlett                        2002
   5    Copyright (C) Jelmer Vernooij                        2002
   6    Copyright (C) Simo Sorce                             2003
   7    Copyright (C) Volker Lendecke                        2006
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_PASSDB
  28
  29 /* Cache of latest SAM lookup query */
  30
  31 static struct samu *csamuser = NULL;
  32
  33 static_decl_pdb;
  34
  35 static struct pdb_init_function_entry *backends = NULL;
  36
  37 static void lazy_initialize_passdb(void)
  38 {
  39         static BOOL initialized = False;
  40         if(initialized)return;
  41         static_init_pdb;
  42         initialized = True;
  43 }
  44
  45 static BOOL lookup_global_sam_rid(TALLOC_CTX *mem_ctx, uint32 rid,
  46                                   const char **name,
  47                                   enum SID_NAME_USE *psid_name_use,
  48                                   union unid_t *unix_id);
  49 /*******************************************************************
  50  Clean up uninitialised passwords.  The only way to tell
  51  that these values are not 'real' is that they do not
  52  have a valid last set time.  Instead, the value is fixed at 0.
  53  Therefore we use that as the key for 'is this a valid password'.
  54  However, it is perfectly valid to have a 'default' last change
  55  time, such LDAP with a missing attribute would produce.
  56 ********************************************************************/
  57
  58 static void pdb_force_pw_initialization(struct samu *pass)
  59 {
  60         const uint8 *lm_pwd, *nt_pwd;
  61
  62         /* only reset a password if the last set time has been
  63            explicitly been set to zero.  A default last set time
  64            is ignored */
  65
  66         if ( (pdb_get_init_flags(pass, PDB_PASSLASTSET) != PDB_DEFAULT)
  67                 && (pdb_get_pass_last_set_time(pass) == 0) )
  68         {
  69
  70                 if (pdb_get_init_flags(pass, PDB_LMPASSWD) != PDB_DEFAULT)
  71                 {
  72                         lm_pwd = pdb_get_lanman_passwd(pass);
  73                         if (lm_pwd)
  74                                 pdb_set_lanman_passwd(pass, NULL, PDB_CHANGED);
  75                 }
  76                 if (pdb_get_init_flags(pass, PDB_NTPASSWD) != PDB_DEFAULT)
  77                 {
  78                         nt_pwd = pdb_get_nt_passwd(pass);
  79                         if (nt_pwd)
  80                                 pdb_set_nt_passwd(pass, NULL, PDB_CHANGED);
  81                 }
  82         }
  83
  84         return;
  85 }
  86
  87 NTSTATUS smb_register_passdb(int version, const char *name, pdb_init_function init)
  88 {
  89         struct pdb_init_function_entry *entry = backends;
  90
  91         if(version != PASSDB_INTERFACE_VERSION) {
  92                 DEBUG(0,("Can't register passdb backend!\n"
  93                          "You tried to register a passdb module with PASSDB_INTERFACE_VERSION %d, "
  94                          "while this version of samba uses version %d\n",
  95                          version,PASSDB_INTERFACE_VERSION));
  96                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
  97         }
  98
  99         if (!name || !init) {
 100                 return NT_STATUS_INVALID_PARAMETER;
 101         }
 102
 103         DEBUG(5,("Attempting to register passdb backend %s\n", name));
 104
 105         /* Check for duplicates */
 106         if (pdb_find_backend_entry(name)) {
 107                 DEBUG(0,("There already is a passdb backend registered with the name %s!\n", name));
 108                 return NT_STATUS_OBJECT_NAME_COLLISION;
 109         }
 110
 111         entry = SMB_XMALLOC_P(struct pdb_init_function_entry);
 112         entry->name = smb_xstrdup(name);
 113         entry->init = init;
 114
 115         DLIST_ADD(backends, entry);
 116         DEBUG(5,("Successfully added passdb backend '%s'\n", name));
 117         return NT_STATUS_OK;
 118 }
 119
 120 struct pdb_init_function_entry *pdb_find_backend_entry(const char *name)
 121 {
 122         struct pdb_init_function_entry *entry = backends;
 123
 124         while(entry) {
 125                 if (strcmp(entry->name, name)==0) return entry;
 126                 entry = entry->next;
 127         }
 128
 129         return NULL;
 130 }
 131
 132 /******************************************************************
 133   Make a pdb_methods from scratch
 134  *******************************************************************/
 135
 136 NTSTATUS make_pdb_method_name(struct pdb_methods **methods, const char *selected)
 137 {
 138         char *module_name = smb_xstrdup(selected);
 139         char *module_location = NULL, *p;
 140         struct pdb_init_function_entry *entry;
 141         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 142
 143         lazy_initialize_passdb();
 144
 145         p = strchr(module_name, ':');
 146
 147         if (p) {
 148                 *p = 0;
 149                 module_location = p+1;
 150                 trim_char(module_location, ' ', ' ');
 151         }
 152
 153         trim_char(module_name, ' ', ' ');
 154
 155
 156         DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
 157
 158         entry = pdb_find_backend_entry(module_name);
 159
 160         /* Try to find a module that contains this module */
 161         if (!entry) {
 162                 DEBUG(2,("No builtin backend found, trying to load plugin\n"));
 163                 if(NT_STATUS_IS_OK(smb_probe_module("pdb", module_name)) && !(entry = pdb_find_backend_entry(module_name))) {
 164                         DEBUG(0,("Plugin is available, but doesn't register passdb backend %s\n", module_name));
 165                         SAFE_FREE(module_name);
 166                         return NT_STATUS_UNSUCCESSFUL;
 167                 }
 168         }
 169
 170         /* No such backend found */
 171         if(!entry) {
 172                 DEBUG(0,("No builtin nor plugin backend for %s found\n", module_name));
 173                 SAFE_FREE(module_name);
 174                 return NT_STATUS_INVALID_PARAMETER;
 175         }
 176
 177         DEBUG(5,("Found pdb backend %s\n", module_name));
 178
 179         if ( !NT_STATUS_IS_OK( nt_status = entry->init(methods, module_location) ) ) {
 180                 DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n",
 181                         selected, nt_errstr(nt_status)));
 182                 SAFE_FREE(module_name);
 183                 return nt_status;
 184         }
 185
 186         SAFE_FREE(module_name);
 187
 188         DEBUG(5,("pdb backend %s has a valid init\n", selected));
 189
 190         return nt_status;
 191 }
 192
 193 /******************************************************************
 194  Return an already initialised pdn_methods structure
 195 *******************************************************************/
 196
 197 static struct pdb_methods *pdb_get_methods_reload( BOOL reload )
 198 {
 199         static struct pdb_methods *pdb = NULL;
 200
 201         if ( pdb && reload ) {
 202                 pdb->free_private_data( &(pdb->private_data) );
 203                 if ( !NT_STATUS_IS_OK( make_pdb_method_name( &pdb, lp_passdb_backend() ) ) ) {
 204                         return NULL;
 205                 }
 206         }
 207
 208         if ( !pdb ) {
 209                 if ( !NT_STATUS_IS_OK( make_pdb_method_name( &pdb, lp_passdb_backend() ) ) ) {
 210                         return NULL;
 211                 }
 212         }
 213
 214         return pdb;
 215 }
 216
 217 static struct pdb_methods *pdb_get_methods(void)
 218 {
 219         return pdb_get_methods_reload(False);
 220 }
 221
 222 /******************************************************************
 223  Backward compatibility functions for the original passdb interface
 224 *******************************************************************/
 225
 226 BOOL pdb_setsampwent(BOOL update, uint16 acb_mask)
 227 {
 228         struct pdb_methods *pdb = pdb_get_methods();
 229
 230         if ( !pdb ) {
 231                 return False;
 232         }
 233
 234         return NT_STATUS_IS_OK(pdb->setsampwent(pdb, update, acb_mask));
 235 }
 236
 237 void pdb_endsampwent(void)
 238 {
 239         struct pdb_methods *pdb = pdb_get_methods();
 240
 241         if ( !pdb ) {
 242                 return;
 243         }
 244
 245         pdb->endsampwent(pdb);
 246 }
 247
 248 BOOL pdb_getsampwent(struct samu *user)
 249 {
 250         struct pdb_methods *pdb = pdb_get_methods();
 251
 252         if ( !pdb ) {
 253                 return False;
 254         }
 255
 256         if ( !NT_STATUS_IS_OK(pdb->getsampwent(pdb, user) ) ) {
 257                 return False;
 258         }
 259
 260         pdb_force_pw_initialization( user );
 261
 262         return True;
 263 }
 264
 265 BOOL pdb_getsampwnam(struct samu *sam_acct, const char *username)
 266 {
 267         struct pdb_methods *pdb = pdb_get_methods();
 268
 269         if ( !pdb ) {
 270                 return False;
 271         }
 272
 273         if (!NT_STATUS_IS_OK(pdb->getsampwnam(pdb, sam_acct, username))) {
 274                 return False;
 275         }
 276
 277         if ( csamuser ) {
 278                 TALLOC_FREE(csamuser);
 279         }
 280
 281         pdb_force_pw_initialization( sam_acct );
 282
 283         if ( (csamuser = samu_new( NULL )) != NULL ) {
 284                 pdb_copy_sam_account(csamuser, sam_acct);
 285         }
 286
 287         return True;
 288 }
 289
 290 /**********************************************************************
 291 **********************************************************************/
 292
 293 BOOL guest_user_info( struct samu *user )
 294 {
 295         struct passwd *pwd;
 296         NTSTATUS result;
 297         const char *guestname = lp_guestaccount();
 298
 299         if ( !(pwd = getpwnam_alloc( NULL, guestname ) ) ) {
 300                 DEBUG(0,("guest_user_info: Unable to locate guest account [%s]!\n",
 301                         guestname));
 302                 return False;
 303         }
 304
 305         result = samu_set_unix(user, pwd );
 306
 307         TALLOC_FREE( pwd );
 308
 309         return NT_STATUS_IS_OK( result );
 310 }
 311
 312 /**********************************************************************
 313 **********************************************************************/
 314
 315 BOOL pdb_getsampwsid(struct samu *sam_acct, const DOM_SID *sid)
 316 {
 317         struct pdb_methods *pdb;
 318         uint32 rid;
 319
 320         if ( !(pdb = pdb_get_methods()) ) {
 321                 return False;
 322         }
 323
 324         /* hard code the Guest RID of 501 */
 325
 326         if ( !sid_peek_check_rid( get_global_sam_sid(), sid, &rid ) )
 327                 return False;
 328
 329         if ( rid == DOMAIN_USER_RID_GUEST ) {
 330                 DEBUG(6,("pdb_getsampwsid: Building guest account\n"));
 331                 return guest_user_info( sam_acct );
 332         }
 333
 334         /* check the cache first */
 335
 336         if ( csamuser && sid_equal(sid, pdb_get_user_sid(csamuser) ) )
 337                 return pdb_copy_sam_account(sam_acct, csamuser);
 338
 339         return NT_STATUS_IS_OK(pdb->getsampwsid(pdb, sam_acct, sid));
 340 }
 341
 342 static NTSTATUS pdb_default_create_user(struct pdb_methods *methods,
 343                                         TALLOC_CTX *tmp_ctx, const char *name,
 344                                         uint32 acb_info, uint32 *rid)
 345 {
 346         struct samu *sam_pass;
 347         NTSTATUS status;
 348         struct passwd *pwd;
 349
 350         if ((sam_pass = samu_new(tmp_ctx)) == NULL) {
 351                 return NT_STATUS_NO_MEMORY;
 352         }
 353
 354         if ( !(pwd = Get_Pwnam_alloc(tmp_ctx, name)) ) {
 355                 pstring add_script;
 356                 int add_ret;
 357
 358                 if ((acb_info & ACB_NORMAL) && name[strlen(name)-1] != '$') {
 359                         pstrcpy(add_script, lp_adduser_script());
 360                 } else {
 361                         pstrcpy(add_script, lp_addmachine_script());
 362                 }
 363
 364                 if (add_script[0] == '\0') {
 365                         DEBUG(3, ("Could not find user %s and no add script "
 366                                   "defined\n", name));
 367                         return NT_STATUS_NO_SUCH_USER;
 368                 }
 369
 370                 all_string_sub(add_script, "%u", name, sizeof(add_script));
 371                 add_ret = smbrun(add_script,NULL);
 372                 DEBUG(add_ret ? 0 : 3, ("_samr_create_user: Running the command `%s' gave %d\n",
 373                                         add_script, add_ret));
 374                 flush_pwnam_cache();
 375
 376                 pwd = Get_Pwnam_alloc(tmp_ctx, name);
 377         }
 378
 379         /* we have a valid SID coming out of this call */
 380
 381         status = samu_alloc_rid_unix( sam_pass, pwd );
 382
 383         TALLOC_FREE( pwd );
 384
 385         if (!NT_STATUS_IS_OK(status)) {
 386                 DEBUG(3, ("pdb_default_create_user: failed to create a new user structure: %s\n", nt_errstr(status)));
 387                 return status;
 388         }
 389
 390         if (!sid_peek_check_rid(get_global_sam_sid(),
 391                                 pdb_get_user_sid(sam_pass), rid)) {
 392                 DEBUG(0, ("Could not get RID of fresh user\n"));
 393                 return NT_STATUS_INTERNAL_ERROR;
 394         }
 395
 396         /* Disable the account on creation, it does not have a reasonable password yet. */
 397
 398         acb_info |= ACB_DISABLED;
 399
 400         pdb_set_acct_ctrl(sam_pass, acb_info, PDB_CHANGED);
 401
 402         status = pdb_add_sam_account(sam_pass);
 403
 404         TALLOC_FREE(sam_pass);
 405
 406         return status;
 407 }
 408
 409 NTSTATUS pdb_create_user(TALLOC_CTX *mem_ctx, const char *name, uint32 flags,
 410                          uint32 *rid)
 411 {
 412         struct pdb_methods *pdb = pdb_get_methods();
 413
 414         if ( !pdb ) {
 415                 return NT_STATUS_UNSUCCESSFUL;
 416         }
 417
 418         return pdb->create_user(pdb, mem_ctx, name, flags, rid);
 419 }
 420
 421 /****************************************************************************
 422  Delete a UNIX user on demand.
 423 ****************************************************************************/
 424
 425 static int smb_delete_user(const char *unix_user)
 426 {
 427         pstring del_script;
 428         int ret;
 429
 430         /* safety check */
 431
 432         if ( strequal( unix_user, "root" ) ) {
 433                 DEBUG(0,("smb_delete_user: Refusing to delete local system root account!\n"));
 434                 return -1;
 435         }
 436
 437         pstrcpy(del_script, lp_deluser_script());
 438         if (! *del_script)
 439                 return -1;
 440         all_string_sub(del_script, "%u", unix_user, sizeof(del_script));
 441         ret = smbrun(del_script,NULL);
 442         flush_pwnam_cache();
 443         DEBUG(ret ? 0 : 3,("smb_delete_user: Running the command `%s' gave %d\n",del_script,ret));
 444
 445         return ret;
 446 }
 447
 448 static NTSTATUS pdb_default_delete_user(struct pdb_methods *methods,
 449                                         TALLOC_CTX *mem_ctx,
 450                                         struct samu *sam_acct)
 451 {
 452         NTSTATUS status;
 453
 454         status = pdb_delete_sam_account(sam_acct);
 455         if (!NT_STATUS_IS_OK(status)) {
 456                 return status;
 457         }
 458
 459         /*
 460          * Now delete the unix side ....
 461          * note: we don't check if the delete really happened as the script is
 462          * not necessary present and maybe the sysadmin doesn't want to delete
 463          * the unix side
 464          */
 465         smb_delete_user( pdb_get_username(sam_acct) );
 466
 467         return status;
 468 }
 469
 470 NTSTATUS pdb_delete_user(TALLOC_CTX *mem_ctx, struct samu *sam_acct)
 471 {
 472         struct pdb_methods *pdb = pdb_get_methods();
 473         uid_t uid = -1;
 474
 475         if ( !pdb ) {
 476                 return NT_STATUS_UNSUCCESSFUL;
 477         }
 478
 479         /* sanity check to make sure we don't delete root */
 480
 481         if ( !sid_to_uid( pdb_get_user_sid(sam_acct), &uid ) ) {
 482                 return NT_STATUS_NO_SUCH_USER;
 483         }
 484
 485         if ( uid == 0 ) {
 486                 return NT_STATUS_ACCESS_DENIED;
 487         }
 488
 489         return pdb->delete_user(pdb, mem_ctx, sam_acct);
 490 }
 491
 492 NTSTATUS pdb_add_sam_account(struct samu *sam_acct)
 493 {
 494         struct pdb_methods *pdb = pdb_get_methods();
 495
 496         if ( !pdb ) {
 497                 return NT_STATUS_UNSUCCESSFUL;
 498         }
 499
 500         return pdb->add_sam_account(pdb, sam_acct);
 501 }
 502
 503 NTSTATUS pdb_update_sam_account(struct samu *sam_acct)
 504 {
 505         struct pdb_methods *pdb = pdb_get_methods();
 506
 507         if ( !pdb ) {
 508                 return NT_STATUS_UNSUCCESSFUL;
 509         }
 510
 511         if (csamuser != NULL) {
 512                 TALLOC_FREE(csamuser);
 513                 csamuser = NULL;
 514         }
 515
 516         return pdb->update_sam_account(pdb, sam_acct);
 517 }
 518
 519 NTSTATUS pdb_delete_sam_account(struct samu *sam_acct)
 520 {
 521         struct pdb_methods *pdb = pdb_get_methods();
 522
 523         if ( !pdb ) {
 524                 return NT_STATUS_UNSUCCESSFUL;
 525         }
 526
 527         if (csamuser != NULL) {
 528                 TALLOC_FREE(csamuser);
 529                 csamuser = NULL;
 530         }
 531
 532         return pdb->delete_sam_account(pdb, sam_acct);
 533 }
 534
 535 NTSTATUS pdb_rename_sam_account(struct samu *oldname, const char *newname)
 536 {
 537         struct pdb_methods *pdb = pdb_get_methods();
 538         uid_t uid;
 539
 540         if ( !pdb ) {
 541                 return NT_STATUS_NOT_IMPLEMENTED;
 542         }
 543
 544         if (csamuser != NULL) {
 545                 TALLOC_FREE(csamuser);
 546                 csamuser = NULL;
 547         }
 548
 549         /* sanity check to make sure we don't rename root */
 550
 551         if ( !sid_to_uid( pdb_get_user_sid(oldname), &uid ) ) {
 552                 return NT_STATUS_NO_SUCH_USER;
 553         }
 554
 555         if ( uid == 0 ) {
 556                 return NT_STATUS_ACCESS_DENIED;
 557         }
 558
 559         return pdb->rename_sam_account(pdb, oldname, newname);
 560 }
 561
 562 NTSTATUS pdb_update_login_attempts(struct samu *sam_acct, BOOL success)
 563 {
 564         struct pdb_methods *pdb = pdb_get_methods();
 565
 566         if ( !pdb ) {
 567                 return NT_STATUS_NOT_IMPLEMENTED;
 568         }
 569
 570         return pdb->update_login_attempts(pdb, sam_acct, success);
 571 }
 572
 573 BOOL pdb_getgrsid(GROUP_MAP *map, DOM_SID sid)
 574 {
 575         struct pdb_methods *pdb = pdb_get_methods();
 576
 577         if ( !pdb ) {
 578                 return False;
 579         }
 580
 581         return NT_STATUS_IS_OK(pdb->getgrsid(pdb, map, sid));
 582 }
 583
 584 BOOL pdb_getgrgid(GROUP_MAP *map, gid_t gid)
 585 {
 586         struct pdb_methods *pdb = pdb_get_methods();
 587
 588         if ( !pdb ) {
 589                 return False;
 590         }
 591
 592         return NT_STATUS_IS_OK(pdb->getgrgid(pdb, map, gid));
 593 }
 594
 595 BOOL pdb_getgrnam(GROUP_MAP *map, const char *name)
 596 {
 597         struct pdb_methods *pdb = pdb_get_methods();
 598
 599         if ( !pdb ) {
 600                 return False;
 601         }
 602
 603         return NT_STATUS_IS_OK(pdb->getgrnam(pdb, map, name));
 604 }
 605
 606 static NTSTATUS pdb_default_create_dom_group(struct pdb_methods *methods,
 607                                              TALLOC_CTX *mem_ctx,
 608                                              const char *name,
 609                                              uint32 *rid)
 610 {
 611         DOM_SID group_sid;
 612         struct group *grp;
 613
 614         grp = getgrnam(name);
 615
 616         if (grp == NULL) {
 617                 gid_t gid;
 618
 619                 if (smb_create_group(name, &gid) != 0) {
 620                         return NT_STATUS_ACCESS_DENIED;
 621                 }
 622
 623                 grp = getgrgid(gid);
 624         }
 625
 626         if (grp == NULL) {
 627                 return NT_STATUS_ACCESS_DENIED;
 628         }
 629
 630         if (pdb_rid_algorithm()) {
 631                 *rid = pdb_gid_to_group_rid( grp->gr_gid );
 632         } else {
 633                 if (!pdb_new_rid(rid)) {
 634                         return NT_STATUS_ACCESS_DENIED;
 635                 }
 636         }
 637
 638         sid_compose(&group_sid, get_global_sam_sid(), *rid);
 639
 640         return add_initial_entry(grp->gr_gid, sid_string_static(&group_sid),
 641                                  SID_NAME_DOM_GRP, name, NULL);
 642 }
 643
 644 NTSTATUS pdb_create_dom_group(TALLOC_CTX *mem_ctx, const char *name,
 645                               uint32 *rid)
 646 {
 647         struct pdb_methods *pdb = pdb_get_methods();
 648
 649         if ( !pdb ) {
 650                 return NT_STATUS_UNSUCCESSFUL;
 651         }
 652
 653         return pdb->create_dom_group(pdb, mem_ctx, name, rid);
 654 }
 655
 656 static NTSTATUS pdb_default_delete_dom_group(struct pdb_methods *methods,
 657                                              TALLOC_CTX *mem_ctx,
 658                                              uint32 rid)
 659 {
 660         DOM_SID group_sid;
 661         GROUP_MAP map;
 662         NTSTATUS status;
 663         struct group *grp;
 664         const char *grp_name;
 665
 666         sid_compose(&group_sid, get_global_sam_sid(), rid);
 667
 668         if (!get_domain_group_from_sid(group_sid, &map)) {
 669                 DEBUG(10, ("Could not find group for rid %d\n", rid));
 670                 return NT_STATUS_NO_SUCH_GROUP;
 671         }
 672
 673         /* We need the group name for the smb_delete_group later on */
 674
 675         if (map.gid == (gid_t)-1) {
 676                 return NT_STATUS_NO_SUCH_GROUP;
 677         }
 678
 679         grp = getgrgid(map.gid);
 680         if (grp == NULL) {
 681                 return NT_STATUS_NO_SUCH_GROUP;
 682         }
 683
 684         /* Copy the name, no idea what pdb_delete_group_mapping_entry does.. */
 685
 686         grp_name = talloc_strdup(mem_ctx, grp->gr_name);
 687         if (grp_name == NULL) {
 688                 return NT_STATUS_NO_MEMORY;
 689         }
 690
 691         status = pdb_delete_group_mapping_entry(group_sid);
 692
 693         if (!NT_STATUS_IS_OK(status)) {
 694                 return status;
 695         }
 696
 697         /* Don't check the result of smb_delete_group */
 698
 699         smb_delete_group(grp_name);
 700
 701         return NT_STATUS_OK;
 702 }
 703
 704 NTSTATUS pdb_delete_dom_group(TALLOC_CTX *mem_ctx, uint32 rid)
 705 {
 706         struct pdb_methods *pdb = pdb_get_methods();
 707
 708         if ( !pdb ) {
 709                 return NT_STATUS_UNSUCCESSFUL;
 710         }
 711
 712         return pdb->delete_dom_group(pdb, mem_ctx, rid);
 713 }
 714
 715 NTSTATUS pdb_add_group_mapping_entry(GROUP_MAP *map)
 716 {
 717         struct pdb_methods *pdb = pdb_get_methods();
 718
 719         if ( !pdb ) {
 720                 return NT_STATUS_UNSUCCESSFUL;
 721         }
 722
 723         return pdb->add_group_mapping_entry(pdb, map);
 724 }
 725
 726 NTSTATUS pdb_update_group_mapping_entry(GROUP_MAP *map)
 727 {
 728         struct pdb_methods *pdb = pdb_get_methods();
 729
 730         if ( !pdb ) {
 731                 return NT_STATUS_UNSUCCESSFUL;
 732         }
 733
 734         return pdb->update_group_mapping_entry(pdb, map);
 735 }
 736
 737 NTSTATUS pdb_delete_group_mapping_entry(DOM_SID sid)
 738 {
 739         struct pdb_methods *pdb = pdb_get_methods();
 740
 741         if ( !pdb ) {
 742                 return NT_STATUS_UNSUCCESSFUL;
 743         }
 744
 745         return pdb->delete_group_mapping_entry(pdb, sid);
 746 }
 747
 748 BOOL pdb_enum_group_mapping(const DOM_SID *sid, enum SID_NAME_USE sid_name_use, GROUP_MAP **pp_rmap,
 749                             size_t *p_num_entries, BOOL unix_only)
 750 {
 751         struct pdb_methods *pdb = pdb_get_methods();
 752
 753         if ( !pdb ) {
 754                 return False;
 755         }
 756
 757         return NT_STATUS_IS_OK(pdb-> enum_group_mapping(pdb, sid, sid_name_use,
 758                 pp_rmap, p_num_entries, unix_only));
 759 }
 760
 761 NTSTATUS pdb_enum_group_members(TALLOC_CTX *mem_ctx,
 762                                 const DOM_SID *sid,
 763                                 uint32 **pp_member_rids,
 764                                 size_t *p_num_members)
 765 {
 766         struct pdb_methods *pdb = pdb_get_methods();
 767         NTSTATUS result;
 768
 769         if ( !pdb ) {
 770                 return NT_STATUS_UNSUCCESSFUL;
 771         }
 772
 773         result = pdb->enum_group_members(pdb, mem_ctx,
 774                         sid, pp_member_rids, p_num_members);
 775
 776         /* special check for rid 513 */
 777
 778         if ( !NT_STATUS_IS_OK( result ) ) {
 779                 uint32 rid;
 780
 781                 sid_peek_rid( sid, &rid );
 782
 783                 if ( rid == DOMAIN_GROUP_RID_USERS ) {
 784                         *p_num_members = 0;
 785                         *pp_member_rids = NULL;
 786
 787                         return NT_STATUS_OK;
 788                 }
 789         }
 790
 791         return result;
 792 }
 793
 794 NTSTATUS pdb_enum_group_memberships(TALLOC_CTX *mem_ctx, struct samu *user,
 795                                     DOM_SID **pp_sids, gid_t **pp_gids,
 796                                     size_t *p_num_groups)
 797 {
 798         struct pdb_methods *pdb = pdb_get_methods();
 799
 800         if ( !pdb ) {
 801                 return NT_STATUS_UNSUCCESSFUL;
 802         }
 803
 804         return pdb->enum_group_memberships(
 805                 pdb, mem_ctx, user,
 806                 pp_sids, pp_gids, p_num_groups);
 807 }
 808
 809 static NTSTATUS pdb_default_set_unix_primary_group(struct pdb_methods *methods,
 810                                                    TALLOC_CTX *mem_ctx,
 811                                                    struct samu *sampass)
 812 {
 813         struct group *grp;
 814         gid_t gid;
 815
 816         if (!sid_to_gid(pdb_get_group_sid(sampass), &gid) ||
 817             (grp = getgrgid(gid)) == NULL) {
 818                 return NT_STATUS_INVALID_PRIMARY_GROUP;
 819         }
 820
 821         if (smb_set_primary_group(grp->gr_name,
 822                                   pdb_get_username(sampass)) != 0) {
 823                 return NT_STATUS_ACCESS_DENIED;
 824         }
 825
 826         return NT_STATUS_OK;
 827 }
 828
 829 NTSTATUS pdb_set_unix_primary_group(TALLOC_CTX *mem_ctx, struct samu *user)
 830 {
 831         struct pdb_methods *pdb = pdb_get_methods();
 832
 833         if ( !pdb ) {
 834                 return NT_STATUS_UNSUCCESSFUL;
 835         }
 836
 837         return pdb->set_unix_primary_group(pdb, mem_ctx, user);
 838 }
 839
 840 /*
 841  * Helper function to see whether a user is in a group. We can't use
 842  * user_in_group_sid here because this creates dependencies only smbd can
 843  * fulfil.
 844  */
 845
 846 static BOOL pdb_user_in_group(TALLOC_CTX *mem_ctx, struct samu *account,
 847                               const DOM_SID *group_sid)
 848 {
 849         DOM_SID *sids;
 850         gid_t *gids;
 851         size_t i, num_groups;
 852
 853         if (!NT_STATUS_IS_OK(pdb_enum_group_memberships(mem_ctx, account,
 854                                                         &sids, &gids,
 855                                                         &num_groups))) {
 856                 return False;
 857         }
 858
 859         for (i=0; i<num_groups; i++) {
 860                 if (sid_equal(group_sid, &sids[i])) {
 861                         return True;
 862                 }
 863         }
 864         return False;
 865 }
 866
 867 static NTSTATUS pdb_default_add_groupmem(struct pdb_methods *methods,
 868                                          TALLOC_CTX *mem_ctx,
 869                                          uint32 group_rid,
 870                                          uint32 member_rid)
 871 {
 872         DOM_SID group_sid, member_sid;
 873         struct samu *account = NULL;
 874         GROUP_MAP map;
 875         struct group *grp;
 876         struct passwd *pwd;
 877         const char *group_name;
 878         uid_t uid;
 879
 880         sid_compose(&group_sid, get_global_sam_sid(), group_rid);
 881         sid_compose(&member_sid, get_global_sam_sid(), member_rid);
 882
 883         if (!get_domain_group_from_sid(group_sid, &map) ||
 884             (map.gid == (gid_t)-1) ||
 885             ((grp = getgrgid(map.gid)) == NULL)) {
 886                 return NT_STATUS_NO_SUCH_GROUP;
 887         }
 888
 889         group_name = talloc_strdup(mem_ctx, grp->gr_name);
 890         if (group_name == NULL) {
 891                 return NT_STATUS_NO_MEMORY;
 892         }
 893
 894         if ( !(account = samu_new( NULL )) ) {
 895                 return NT_STATUS_NO_MEMORY;
 896         }
 897
 898         if (!pdb_getsampwsid(account, &member_sid) ||
 899             !sid_to_uid(&member_sid, &uid) ||
 900             ((pwd = getpwuid_alloc(mem_ctx, uid)) == NULL)) {
 901                 return NT_STATUS_NO_SUCH_USER;
 902         }
 903
 904         if (pdb_user_in_group(mem_ctx, account, &group_sid)) {
 905                 return NT_STATUS_MEMBER_IN_GROUP;
 906         }
 907
 908         /*
 909          * ok, the group exist, the user exist, the user is not in the group,
 910          * we can (finally) add it to the group !
 911          */
 912
 913         smb_add_user_group(group_name, pwd->pw_name);
 914
 915         if (!pdb_user_in_group(mem_ctx, account, &group_sid)) {
 916                 return NT_STATUS_ACCESS_DENIED;
 917         }
 918
 919         return NT_STATUS_OK;
 920 }
 921
 922 NTSTATUS pdb_add_groupmem(TALLOC_CTX *mem_ctx, uint32 group_rid,
 923                           uint32 member_rid)
 924 {
 925         struct pdb_methods *pdb = pdb_get_methods();
 926
 927         if ( !pdb ) {
 928                 return NT_STATUS_UNSUCCESSFUL;
 929         }
 930
 931         return pdb->add_groupmem(pdb, mem_ctx, group_rid, member_rid);
 932 }
 933
 934 static NTSTATUS pdb_default_del_groupmem(struct pdb_methods *methods,
 935                                          TALLOC_CTX *mem_ctx,
 936                                          uint32 group_rid,
 937                                          uint32 member_rid)
 938 {
 939         DOM_SID group_sid, member_sid;
 940         struct samu *account = NULL;
 941         GROUP_MAP map;
 942         struct group *grp;
 943         struct passwd *pwd;
 944         const char *group_name;
 945         uid_t uid;
 946
 947         sid_compose(&group_sid, get_global_sam_sid(), group_rid);
 948         sid_compose(&member_sid, get_global_sam_sid(), member_rid);
 949
 950         if (!get_domain_group_from_sid(group_sid, &map) ||
 951             (map.gid == (gid_t)-1) ||
 952             ((grp = getgrgid(map.gid)) == NULL)) {
 953                 return NT_STATUS_NO_SUCH_GROUP;
 954         }
 955
 956         group_name = talloc_strdup(mem_ctx, grp->gr_name);
 957         if (group_name == NULL) {
 958                 return NT_STATUS_NO_MEMORY;
 959         }
 960
 961         if ( !(account = samu_new( NULL )) ) {
 962                 return NT_STATUS_NO_MEMORY;
 963         }
 964
 965         if (!pdb_getsampwsid(account, &member_sid) ||
 966             !sid_to_uid(&member_sid, &uid) ||
 967             ((pwd = getpwuid_alloc(mem_ctx, uid)) == NULL)) {
 968                 return NT_STATUS_NO_SUCH_USER;
 969         }
 970
 971         if (!pdb_user_in_group(mem_ctx, account, &group_sid)) {
 972                 return NT_STATUS_MEMBER_NOT_IN_GROUP;
 973         }
 974
 975         /*
 976          * ok, the group exist, the user exist, the user is in the group,
 977          * we can (finally) delete it from the group!
 978          */
 979
 980         smb_delete_user_group(group_name, pwd->pw_name);
 981
 982         if (pdb_user_in_group(mem_ctx, account, &group_sid)) {
 983                 return NT_STATUS_ACCESS_DENIED;
 984         }
 985
 986         return NT_STATUS_OK;
 987 }
 988
 989 NTSTATUS pdb_del_groupmem(TALLOC_CTX *mem_ctx, uint32 group_rid,
 990                           uint32 member_rid)
 991 {
 992         struct pdb_methods *pdb = pdb_get_methods();
 993
 994         if ( !pdb ) {
 995                 return NT_STATUS_UNSUCCESSFUL;
 996         }
 997
 998         return pdb->del_groupmem(pdb, mem_ctx, group_rid, member_rid);
 999 }
1000
1001 BOOL pdb_find_alias(const char *name, DOM_SID *sid)
1002 {
1003         struct pdb_methods *pdb = pdb_get_methods();
1004
1005         if ( !pdb ) {
1006                 return False;
1007         }
1008
1009         return NT_STATUS_IS_OK(pdb->find_alias(pdb, name, sid));
1010 }
1011
1012 NTSTATUS pdb_create_alias(const char *name, uint32 *rid)
1013 {
1014         struct pdb_methods *pdb = pdb_get_methods();
1015
1016         if ( !pdb ) {
1017                 return NT_STATUS_NOT_IMPLEMENTED;
1018         }
1019
1020         return pdb->create_alias(pdb, name, rid);
1021 }
1022
1023 BOOL pdb_delete_alias(const DOM_SID *sid)
1024 {
1025         struct pdb_methods *pdb = pdb_get_methods();
1026
1027         if ( !pdb ) {
1028                 return False;
1029         }
1030
1031         return NT_STATUS_IS_OK(pdb->delete_alias(pdb, sid));
1032
1033 }
1034
1035 BOOL pdb_get_aliasinfo(const DOM_SID *sid, struct acct_info *info)
1036 {
1037         struct pdb_methods *pdb = pdb_get_methods();
1038
1039         if ( !pdb ) {
1040                 return False;
1041         }
1042
1043         return NT_STATUS_IS_OK(pdb->get_aliasinfo(pdb, sid, info));
1044 }
1045
1046 BOOL pdb_set_aliasinfo(const DOM_SID *sid, struct acct_info *info)
1047 {
1048         struct pdb_methods *pdb = pdb_get_methods();
1049
1050         if ( !pdb ) {
1051                 return False;
1052         }
1053
1054         return NT_STATUS_IS_OK(pdb->set_aliasinfo(pdb, sid, info));
1055 }
1056
1057 NTSTATUS pdb_add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
1058 {
1059         struct pdb_methods *pdb = pdb_get_methods();
1060
1061         if ( !pdb ) {
1062                 return NT_STATUS_UNSUCCESSFUL;
1063         }
1064
1065         return pdb->add_aliasmem(pdb, alias, member);
1066 }
1067
1068 NTSTATUS pdb_del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
1069 {
1070         struct pdb_methods *pdb = pdb_get_methods();
1071
1072         if ( !pdb ) {
1073                 return NT_STATUS_UNSUCCESSFUL;
1074         }
1075
1076         return pdb->del_aliasmem(pdb, alias, member);
1077 }
1078
1079 NTSTATUS pdb_enum_aliasmem(const DOM_SID *alias,
1080                            DOM_SID **pp_members, size_t *p_num_members)
1081 {
1082         struct pdb_methods *pdb = pdb_get_methods();
1083
1084         if ( !pdb ) {
1085                 return NT_STATUS_UNSUCCESSFUL;
1086         }
1087
1088         return pdb->enum_aliasmem(pdb, alias,
1089                                               pp_members, p_num_members);
1090 }
1091
1092 NTSTATUS pdb_enum_alias_memberships(TALLOC_CTX *mem_ctx,
1093                                     const DOM_SID *domain_sid,
1094                                     const DOM_SID *members, size_t num_members,
1095                                     uint32 **pp_alias_rids,
1096                                     size_t *p_num_alias_rids)
1097 {
1098         struct pdb_methods *pdb = pdb_get_methods();
1099
1100         if ( !pdb ) {
1101                 return NT_STATUS_NOT_IMPLEMENTED;
1102         }
1103
1104         return pdb->enum_alias_memberships(pdb, mem_ctx,
1105                                                        domain_sid,
1106                                                        members, num_members,
1107                                                        pp_alias_rids,
1108                                                        p_num_alias_rids);
1109 }
1110
1111 NTSTATUS pdb_lookup_rids(const DOM_SID *domain_sid,
1112                          int num_rids,
1113                          uint32 *rids,
1114                          const char **names,
1115                          uint32 *attrs)
1116 {
1117         struct pdb_methods *pdb = pdb_get_methods();
1118
1119         if ( !pdb ) {
1120                 return NT_STATUS_NOT_IMPLEMENTED;
1121         }
1122
1123         return pdb->lookup_rids(pdb, domain_sid,
1124                                             num_rids, rids, names, attrs);
1125 }
1126
1127 NTSTATUS pdb_lookup_names(const DOM_SID *domain_sid,
1128                           int num_names,
1129                           const char **names,
1130                           uint32 *rids,
1131                           uint32 *attrs)
1132 {
1133         struct pdb_methods *pdb = pdb_get_methods();
1134
1135         if ( !pdb ) {
1136                 return NT_STATUS_NOT_IMPLEMENTED;
1137         }
1138
1139         return pdb->lookup_names(pdb, domain_sid,
1140                                              num_names, names, rids, attrs);
1141 }
1142
1143 BOOL pdb_get_account_policy(int policy_index, uint32 *value)
1144 {
1145         struct pdb_methods *pdb = pdb_get_methods();
1146
1147         if ( !pdb ) {
1148                 return False;
1149         }
1150
1151         return NT_STATUS_IS_OK(pdb->get_account_policy(pdb, policy_index, value));
1152 }
1153
1154 BOOL pdb_set_account_policy(int policy_index, uint32 value)
1155 {
1156         struct pdb_methods *pdb = pdb_get_methods();
1157
1158         if ( !pdb ) {
1159                 return False;
1160         }
1161
1162         return NT_STATUS_IS_OK(pdb->set_account_policy(pdb, policy_index, value));
1163 }
1164
1165 BOOL pdb_get_seq_num(time_t *seq_num)
1166 {
1167         struct pdb_methods *pdb = pdb_get_methods();
1168
1169         if ( !pdb ) {
1170                 return False;
1171         }
1172
1173         return NT_STATUS_IS_OK(pdb->get_seq_num(pdb, seq_num));
1174 }
1175
1176 BOOL pdb_uid_to_rid(uid_t uid, uint32 *rid)
1177 {
1178         struct pdb_methods *pdb = pdb_get_methods();
1179
1180         if ( !pdb ) {
1181                 return False;
1182         }
1183
1184         return pdb->uid_to_rid(pdb, uid, rid);
1185 }
1186
1187 BOOL pdb_gid_to_sid(gid_t gid, DOM_SID *sid)
1188 {
1189         struct pdb_methods *pdb = pdb_get_methods();
1190
1191         if ( !pdb ) {
1192                 return False;
1193         }
1194
1195         return pdb->gid_to_sid(pdb, gid, sid);
1196 }
1197
1198 BOOL pdb_sid_to_id(const DOM_SID *sid, union unid_t *id,
1199                    enum SID_NAME_USE *type)
1200 {
1201         struct pdb_methods *pdb = pdb_get_methods();
1202
1203         if ( !pdb ) {
1204                 return False;
1205         }
1206
1207         return pdb->sid_to_id(pdb, sid, id, type);
1208 }
1209
1210 BOOL pdb_rid_algorithm(void)
1211 {
1212         struct pdb_methods *pdb = pdb_get_methods();
1213
1214         if ( !pdb ) {
1215                 return False;
1216         }
1217
1218         return pdb->rid_algorithm(pdb);
1219 }
1220
1221 /********************************************************************
1222  Allocate a new RID from the passdb backend.  Verify that it is free
1223  by calling lookup_global_sam_rid() to verify that the RID is not
1224  in use.  This handles servers that have existing users or groups
1225  with add RIDs (assigned from previous algorithmic mappings)
1226 ********************************************************************/
1227
1228 BOOL pdb_new_rid(uint32 *rid)
1229 {
1230         struct pdb_methods *pdb = pdb_get_methods();
1231         const char *name = NULL;
1232         enum SID_NAME_USE type;
1233         uint32 allocated_rid = 0;
1234         int i;
1235         TALLOC_CTX *ctx;
1236
1237         if ( !pdb ) {
1238                 return False;
1239         }
1240
1241         if (pdb_rid_algorithm()) {
1242                 DEBUG(0, ("Trying to allocate a RID when algorithmic RIDs "
1243                           "are active\n"));
1244                 return False;
1245         }
1246
1247         if (algorithmic_rid_base() != BASE_RID) {
1248                 DEBUG(0, ("'algorithmic rid base' is set but a passdb backend "
1249                           "without algorithmic RIDs is chosen.\n"));
1250                 DEBUGADD(0, ("Please map all used groups using 'net groupmap "
1251                              "add', set the maximum used RID using\n"));
1252                 DEBUGADD(0, ("'net setmaxrid' and remove the parameter\n"));
1253                 return False;
1254         }
1255
1256         if ( (ctx = talloc_init("pdb_new_rid")) == NULL ) {
1257                 DEBUG(0,("pdb_new_rid: Talloc initialization failure\n"));
1258                 return False;
1259         }
1260
1261         /* Attempt to get an unused RID (max tires is 250...yes that it is
1262            and arbitrary number I pulkled out of my head).   -- jerry */
1263
1264         for ( i=0; allocated_rid==0 && i<250; i++ ) {
1265                 /* get a new RID */
1266
1267                 if ( !pdb->new_rid(pdb, &allocated_rid) ) {
1268                         return False;
1269                 }
1270
1271                 /* validate that the RID is not in use */
1272
1273                 if ( lookup_global_sam_rid( ctx, allocated_rid, &name, &type, NULL ) ) {
1274                         allocated_rid = 0;
1275                 }
1276         }
1277
1278         TALLOC_FREE( ctx );
1279
1280         if ( allocated_rid == 0 ) {
1281                 DEBUG(0,("pdb_new_rid: Failed to find unused RID\n"));
1282                 return False;
1283         }
1284
1285         *rid = allocated_rid;
1286
1287         return True;
1288 }
1289
1290 /***************************************************************
1291   Initialize the static context (at smbd startup etc).
1292
1293   If uninitialised, context will auto-init on first use.
1294  ***************************************************************/
1295
1296 BOOL initialize_password_db(BOOL reload)
1297 {
1298         return (pdb_get_methods_reload(reload) != NULL);
1299 }
1300
1301
1302 /***************************************************************************
1303   Default implementations of some functions.
1304  ****************************************************************************/
1305
1306 static NTSTATUS pdb_default_getsampwnam (struct pdb_methods *methods, struct samu *user, const char *sname)
1307 {
1308         return NT_STATUS_NO_SUCH_USER;
1309 }
1310
1311 static NTSTATUS pdb_default_getsampwsid(struct pdb_methods *my_methods, struct samu * user, const DOM_SID *sid)
1312 {
1313         return NT_STATUS_NO_SUCH_USER;
1314 }
1315
1316 static NTSTATUS pdb_default_add_sam_account (struct pdb_methods *methods, struct samu *newpwd)
1317 {
1318         return NT_STATUS_NOT_IMPLEMENTED;
1319 }
1320
1321 static NTSTATUS pdb_default_update_sam_account (struct pdb_methods *methods, struct samu *newpwd)
1322 {
1323         return NT_STATUS_NOT_IMPLEMENTED;
1324 }
1325
1326 static NTSTATUS pdb_default_delete_sam_account (struct pdb_methods *methods, struct samu *pwd)
1327 {
1328         return NT_STATUS_NOT_IMPLEMENTED;
1329 }
1330
1331 static NTSTATUS pdb_default_rename_sam_account (struct pdb_methods *methods, struct samu *pwd, const char *newname)
1332 {
1333         return NT_STATUS_NOT_IMPLEMENTED;
1334 }
1335
1336 static NTSTATUS pdb_default_update_login_attempts (struct pdb_methods *methods, struct samu *newpwd, BOOL success)
1337 {
1338         return NT_STATUS_OK;
1339 }
1340
1341 static NTSTATUS pdb_default_setsampwent(struct pdb_methods *methods, BOOL update, uint32 acb_mask)
1342 {
1343         return NT_STATUS_NOT_IMPLEMENTED;
1344 }
1345
1346 static NTSTATUS pdb_default_getsampwent(struct pdb_methods *methods, struct samu *user)
1347 {
1348         return NT_STATUS_NOT_IMPLEMENTED;
1349 }
1350
1351 static void pdb_default_endsampwent(struct pdb_methods *methods)
1352 {
1353         return; /* NT_STATUS_NOT_IMPLEMENTED; */
1354 }
1355
1356 static NTSTATUS pdb_default_get_account_policy(struct pdb_methods *methods, int policy_index, uint32 *value)
1357 {
1358         return account_policy_get(policy_index, value) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
1359 }
1360
1361 static NTSTATUS pdb_default_set_account_policy(struct pdb_methods *methods, int policy_index, uint32 value)
1362 {
1363         return account_policy_set(policy_index, value) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
1364 }
1365
1366 static NTSTATUS pdb_default_get_seq_num(struct pdb_methods *methods, time_t *seq_num)
1367 {
1368         *seq_num = time(NULL);
1369         return NT_STATUS_OK;
1370 }
1371
1372 static BOOL pdb_default_uid_to_rid(struct pdb_methods *methods, uid_t uid,
1373                                    uint32 *rid)
1374 {
1375         struct samu *sampw = NULL;
1376         struct passwd *unix_pw;
1377         BOOL ret;
1378
1379         unix_pw = sys_getpwuid( uid );
1380
1381         if ( !unix_pw ) {
1382                 DEBUG(4,("pdb_default_uid_to_rid: host has no idea of uid "
1383                          "%lu\n", (unsigned long)uid));
1384                 return False;
1385         }
1386
1387         if ( !(sampw = samu_new( NULL )) ) {
1388                 DEBUG(0,("pdb_default_uid_to_rid: samu_new() failed!\n"));
1389                 return False;
1390         }
1391
1392         become_root();
1393         ret = NT_STATUS_IS_OK(
1394                 methods->getsampwnam(methods, sampw, unix_pw->pw_name ));
1395         unbecome_root();
1396
1397         if (!ret) {
1398                 DEBUG(5, ("pdb_default_uid_to_rid: Did not find user "
1399                           "%s (%d)\n", unix_pw->pw_name, uid));
1400                 TALLOC_FREE(sampw);
1401                 return False;
1402         }
1403
1404         ret = sid_peek_check_rid(get_global_sam_sid(),
1405                                  pdb_get_user_sid(sampw), rid);
1406
1407         if (!ret) {
1408                 DEBUG(1, ("Could not peek rid out of sid %s\n",
1409                           sid_string_static(pdb_get_user_sid(sampw))));
1410         }
1411
1412         TALLOC_FREE(sampw);
1413         return ret;
1414 }
1415
1416 static BOOL pdb_default_gid_to_sid(struct pdb_methods *methods, gid_t gid,
1417                                    DOM_SID *sid)
1418 {
1419         GROUP_MAP map;
1420
1421         if (!NT_STATUS_IS_OK(methods->getgrgid(methods, &map, gid))) {
1422                 return False;
1423         }
1424
1425         sid_copy(sid, &map.sid);
1426         return True;
1427 }
1428
1429 static BOOL pdb_default_sid_to_id(struct pdb_methods *methods,
1430                                   const DOM_SID *sid,
1431                                   union unid_t *id, enum SID_NAME_USE *type)
1432 {
1433         TALLOC_CTX *mem_ctx;
1434         BOOL ret = False;
1435         const char *name;
1436         uint32 rid;
1437
1438         mem_ctx = talloc_new(NULL);
1439
1440         if (mem_ctx == NULL) {
1441                 DEBUG(0, ("talloc_new failed\n"));
1442                 return False;
1443         }
1444
1445         if (sid_peek_check_rid(get_global_sam_sid(), sid, &rid)) {
1446                 /* Here we might have users as well as groups and aliases */
1447                 ret = lookup_global_sam_rid(mem_ctx, rid, &name, type, id);
1448                 goto done;
1449         }
1450
1451         if (sid_peek_check_rid(&global_sid_Builtin, sid, &rid)) {
1452                 /* Here we only have aliases */
1453                 GROUP_MAP map;
1454                 if (!NT_STATUS_IS_OK(methods->getgrsid(methods, &map, *sid))) {
1455                         DEBUG(10, ("Could not find map for sid %s\n",
1456                                    sid_string_static(sid)));
1457                         goto done;
1458                 }
1459                 if ((map.sid_name_use != SID_NAME_ALIAS) &&
1460                     (map.sid_name_use != SID_NAME_WKN_GRP)) {
1461                         DEBUG(10, ("Map for sid %s is a %s, expected an "
1462                                    "alias\n", sid_string_static(sid),
1463                                    sid_type_lookup(map.sid_name_use)));
1464                         goto done;
1465                 }
1466
1467                 id->gid = map.gid;
1468                 *type = SID_NAME_ALIAS;
1469                 ret = True;
1470                 goto done;
1471         }
1472
1473         DEBUG(5, ("Sid %s is neither ours nor builtin, don't know it\n",
1474                   sid_string_static(sid)));
1475
1476  done:
1477
1478         TALLOC_FREE(mem_ctx);
1479         return ret;
1480 }
1481
1482 static void add_uid_to_array_unique(TALLOC_CTX *mem_ctx,
1483                                     uid_t uid, uid_t **pp_uids, size_t *p_num)
1484 {
1485         size_t i;
1486
1487         for (i=0; i<*p_num; i++) {
1488                 if ((*pp_uids)[i] == uid)
1489                         return;
1490         }
1491
1492         *pp_uids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_uids, uid_t, *p_num+1);
1493
1494         if (*pp_uids == NULL)
1495                 return;
1496
1497         (*pp_uids)[*p_num] = uid;
1498         *p_num += 1;
1499 }
1500
1501 static BOOL get_memberuids(TALLOC_CTX *mem_ctx, gid_t gid, uid_t **pp_uids, size_t *p_num)
1502 {
1503         struct group *grp;
1504         char **gr;
1505         struct passwd *pwd;
1506         char *winbindd_env;
1507
1508         *pp_uids = NULL;
1509         *p_num = 0;
1510
1511         /* We only look at our own sam, so don't care about imported stuff */
1512
1513         winbindd_env = getenv(WINBINDD_DONT_ENV);
1514         winbind_off();
1515
1516         if ((grp = getgrgid(gid)) == NULL) {
1517                 /* allow winbindd lookups, but only if they weren't already disabled */
1518                 if ( !(winbindd_env && strequal(winbindd_env, "1")) ) {
1519                         winbind_on();
1520                 }
1521
1522                 return False;
1523         }
1524
1525         /* Primary group members */
1526
1527         setpwent();
1528         while ((pwd = getpwent()) != NULL) {
1529                 if (pwd->pw_gid == gid) {
1530                         add_uid_to_array_unique(mem_ctx, pwd->pw_uid,
1531                                                 pp_uids, p_num);
1532                 }
1533         }
1534         endpwent();
1535
1536         /* Secondary group members */
1537
1538         for (gr = grp->gr_mem; (*gr != NULL) && ((*gr)[0] != '\0'); gr += 1) {
1539                 struct passwd *pw = getpwnam(*gr);
1540
1541                 if (pw == NULL)
1542                         continue;
1543                 add_uid_to_array_unique(mem_ctx, pw->pw_uid, pp_uids, p_num);
1544         }
1545
1546         /* allow winbindd lookups, but only if they weren't already disabled */
1547
1548         if ( !(winbindd_env && strequal(winbindd_env, "1")) ) {
1549                 winbind_on();
1550         }
1551
1552         return True;
1553 }
1554
1555 NTSTATUS pdb_default_enum_group_members(struct pdb_methods *methods,
1556                                         TALLOC_CTX *mem_ctx,
1557                                         const DOM_SID *group,
1558                                         uint32 **pp_member_rids,
1559                                         size_t *p_num_members)
1560 {
1561         gid_t gid;
1562         uid_t *uids;
1563         size_t i, num_uids;
1564
1565         *pp_member_rids = NULL;
1566         *p_num_members = 0;
1567
1568         if (!sid_to_gid(group, &gid))
1569                 return NT_STATUS_NO_SUCH_GROUP;
1570
1571         if(!get_memberuids(mem_ctx, gid, &uids, &num_uids))
1572                 return NT_STATUS_NO_SUCH_GROUP;
1573
1574         if (num_uids == 0)
1575                 return NT_STATUS_OK;
1576
1577         *pp_member_rids = TALLOC_ZERO_ARRAY(mem_ctx, uint32, num_uids);
1578
1579         for (i=0; i<num_uids; i++) {
1580                 DOM_SID sid;
1581
1582                 uid_to_sid(&sid, uids[i]);
1583
1584                 if (!sid_check_is_in_our_domain(&sid)) {
1585                         DEBUG(5, ("Inconsistent SAM -- group member uid not "
1586                                   "in our domain\n"));
1587                         continue;
1588                 }
1589
1590                 sid_peek_rid(&sid, &(*pp_member_rids)[*p_num_members]);
1591                 *p_num_members += 1;
1592         }
1593
1594         return NT_STATUS_OK;
1595 }
1596
1597 NTSTATUS pdb_default_enum_group_memberships(struct pdb_methods *methods,
1598                                             TALLOC_CTX *mem_ctx,
1599                                             struct samu *user,
1600                                             DOM_SID **pp_sids,
1601                                             gid_t **pp_gids,
1602                                             size_t *p_num_groups)
1603 {
1604         size_t i;
1605         gid_t gid;
1606         struct passwd *pw;
1607         const char *username = pdb_get_username(user);
1608
1609
1610         /* Ignore the primary group SID.  Honor the real Unix primary group.
1611            The primary group SID is only of real use to Windows clients */
1612
1613         if ( !(pw = getpwnam_alloc(mem_ctx, username)) ) {
1614                 return NT_STATUS_NO_SUCH_USER;
1615         }
1616
1617         gid = pw->pw_gid;
1618
1619         TALLOC_FREE( pw );
1620
1621         if (!getgroups_unix_user(mem_ctx, username, gid, pp_gids, p_num_groups)) {
1622                 return NT_STATUS_NO_SUCH_USER;
1623         }
1624
1625         if (*p_num_groups == 0) {
1626                 smb_panic("primary group missing");
1627         }
1628
1629         *pp_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *p_num_groups);
1630
1631         if (*pp_sids == NULL) {
1632                 TALLOC_FREE(*pp_gids);
1633                 return NT_STATUS_NO_MEMORY;
1634         }
1635
1636         for (i=0; i<*p_num_groups; i++) {
1637                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
1638         }
1639
1640         return NT_STATUS_OK;
1641 }
1642
1643 /*******************************************************************
1644  Look up a rid in the SAM we're responsible for (i.e. passdb)
1645  ********************************************************************/
1646
1647 static BOOL lookup_global_sam_rid(TALLOC_CTX *mem_ctx, uint32 rid,
1648                                   const char **name,
1649                                   enum SID_NAME_USE *psid_name_use,
1650                                   union unid_t *unix_id)
1651 {
1652         struct samu *sam_account = NULL;
1653         GROUP_MAP map;
1654         BOOL ret;
1655         DOM_SID sid;
1656
1657         *psid_name_use = SID_NAME_UNKNOWN;
1658
1659         DEBUG(5,("lookup_global_sam_rid: looking up RID %u.\n",
1660                  (unsigned int)rid));
1661
1662         sid_copy(&sid, get_global_sam_sid());
1663         sid_append_rid(&sid, rid);
1664
1665         /* see if the passdb can help us with the name of the user */
1666
1667         if ( !(sam_account = samu_new( NULL )) ) {
1668                 return False;
1669         }
1670
1671         /* BEING ROOT BLLOCK */
1672         become_root();
1673         if (pdb_getsampwsid(sam_account, &sid)) {
1674                 struct passwd *pw;
1675
1676                 unbecome_root();                /* -----> EXIT BECOME_ROOT() */
1677                 *name = talloc_strdup(mem_ctx, pdb_get_username(sam_account));
1678                 *psid_name_use = SID_NAME_USER;
1679
1680                 TALLOC_FREE(sam_account);
1681
1682                 if (unix_id == NULL) {
1683                         return True;
1684                 }
1685
1686                 pw = Get_Pwnam(*name);
1687                 if (pw == NULL) {
1688                         return False;
1689                 }
1690                 unix_id->uid = pw->pw_uid;
1691                 return True;
1692         }
1693         TALLOC_FREE(sam_account);
1694
1695         ret = pdb_getgrsid(&map, sid);
1696         unbecome_root();
1697         /* END BECOME_ROOT BLOCK */
1698
1699         /* do not resolve SIDs to a name unless there is a valid
1700            gid associated with it */
1701
1702         if ( ret && (map.gid != (gid_t)-1) ) {
1703                 *name = talloc_strdup(mem_ctx, map.nt_name);
1704                 *psid_name_use = map.sid_name_use;
1705
1706                 if ( unix_id ) {
1707                         unix_id->gid = map.gid;
1708                 }
1709
1710                 return True;
1711         }
1712
1713         /* Windows will always map RID 513 to something.  On a non-domain
1714            controller, this gets mapped to SERVER\None. */
1715
1716         if ( unix_id ) {
1717                 DEBUG(5, ("Can't find a unix id for an unmapped group\n"));
1718                 return False;
1719         }
1720
1721         if ( rid == DOMAIN_GROUP_RID_USERS ) {
1722                 *name = talloc_strdup(mem_ctx, "None" );
1723                 *psid_name_use = SID_NAME_DOM_GRP;
1724
1725                 return True;
1726         }
1727
1728         return False;
1729 }
1730
1731 NTSTATUS pdb_default_lookup_rids(struct pdb_methods *methods,
1732                                  const DOM_SID *domain_sid,
1733                                  int num_rids,
1734                                  uint32 *rids,
1735                                  const char **names,
1736                                  uint32 *attrs)
1737 {
1738         int i;
1739         NTSTATUS result;
1740         BOOL have_mapped = False;
1741         BOOL have_unmapped = False;
1742
1743         if (sid_check_is_builtin(domain_sid)) {
1744
1745                 for (i=0; i<num_rids; i++) {
1746                         const char *name;
1747
1748                         if (lookup_builtin_rid(names, rids[i], &name)) {
1749                                 attrs[i] = SID_NAME_ALIAS;
1750                                 names[i] = name;
1751                                 DEBUG(5,("lookup_rids: %s:%d\n",
1752                                          names[i], attrs[i]));
1753                                 have_mapped = True;
1754                         } else {
1755                                 have_unmapped = True;
1756                                 attrs[i] = SID_NAME_UNKNOWN;
1757                         }
1758                 }
1759                 goto done;
1760         }
1761
1762         /* Should not happen, but better check once too many */
1763         if (!sid_check_is_domain(domain_sid)) {
1764                 return NT_STATUS_INVALID_HANDLE;
1765         }
1766
1767         for (i = 0; i < num_rids; i++) {
1768                 const char *name;
1769
1770                 if (lookup_global_sam_rid(names, rids[i], &name, &attrs[i],
1771                                           NULL)) {
1772                         if (name == NULL) {
1773                                 return NT_STATUS_NO_MEMORY;
1774                         }
1775                         names[i] = name;
1776                         DEBUG(5,("lookup_rids: %s:%d\n", names[i], attrs[i]));
1777                         have_mapped = True;
1778                 } else {
1779                         have_unmapped = True;
1780                         attrs[i] = SID_NAME_UNKNOWN;
1781                 }
1782         }
1783
1784  done:
1785
1786         result = NT_STATUS_NONE_MAPPED;
1787
1788         if (have_mapped)
1789                 result = have_unmapped ? STATUS_SOME_UNMAPPED : NT_STATUS_OK;
1790
1791         return result;
1792 }
1793
1794 NTSTATUS pdb_default_lookup_names(struct pdb_methods *methods,
1795                                   const DOM_SID *domain_sid,
1796                                   int num_names,
1797                                   const char **names,
1798                                   uint32 *rids,
1799                                   uint32 *attrs)
1800 {
1801         int i;
1802         NTSTATUS result;
1803         BOOL have_mapped = False;
1804         BOOL have_unmapped = False;
1805
1806         if (sid_check_is_builtin(domain_sid)) {
1807
1808                 for (i=0; i<num_names; i++) {
1809                         uint32 rid;
1810
1811                         if (lookup_builtin_name(names[i], &rid)) {
1812                                 attrs[i] = SID_NAME_ALIAS;
1813                                 rids[i] = rid;
1814                                 DEBUG(5,("lookup_rids: %s:%d\n",
1815                                          names[i], attrs[i]));
1816                                 have_mapped = True;
1817                         } else {
1818                                 have_unmapped = True;
1819                                 attrs[i] = SID_NAME_UNKNOWN;
1820                         }
1821                 }
1822                 goto done;
1823         }
1824
1825         /* Should not happen, but better check once too many */
1826         if (!sid_check_is_domain(domain_sid)) {
1827                 return NT_STATUS_INVALID_HANDLE;
1828         }
1829
1830         for (i = 0; i < num_names; i++) {
1831                 if (lookup_global_sam_name(names[i], 0, &rids[i], &attrs[i])) {
1832                         DEBUG(5,("lookup_names: %s-> %d:%d\n", names[i],
1833                                  rids[i], attrs[i]));
1834                         have_mapped = True;
1835                 } else {
1836                         have_unmapped = True;
1837                         attrs[i] = SID_NAME_UNKNOWN;
1838                 }
1839         }
1840
1841  done:
1842
1843         result = NT_STATUS_NONE_MAPPED;
1844
1845         if (have_mapped)
1846                 result = have_unmapped ? STATUS_SOME_UNMAPPED : NT_STATUS_OK;
1847
1848         return result;
1849 }
1850
1851 static struct pdb_search *pdb_search_init(enum pdb_search_type type)
1852 {
1853         TALLOC_CTX *mem_ctx;
1854         struct pdb_search *result;
1855
1856         mem_ctx = talloc_init("pdb_search");
1857         if (mem_ctx == NULL) {
1858                 DEBUG(0, ("talloc_init failed\n"));
1859                 return NULL;
1860         }
1861
1862         result = TALLOC_P(mem_ctx, struct pdb_search);
1863         if (result == NULL) {
1864                 DEBUG(0, ("talloc failed\n"));
1865                 return NULL;
1866         }
1867
1868         result->mem_ctx = mem_ctx;
1869         result->type = type;
1870         result->cache = NULL;
1871         result->num_entries = 0;
1872         result->cache_size = 0;
1873         result->search_ended = False;
1874
1875         /* Segfault appropriately if not initialized */
1876         result->next_entry = NULL;
1877         result->search_end = NULL;
1878
1879         return result;
1880 }
1881
1882 static void fill_displayentry(TALLOC_CTX *mem_ctx, uint32 rid,
1883                               uint16 acct_flags,
1884                               const char *account_name,
1885                               const char *fullname,
1886                               const char *description,
1887                               struct samr_displayentry *entry)
1888 {
1889         entry->rid = rid;
1890         entry->acct_flags = acct_flags;
1891
1892         if (account_name != NULL)
1893                 entry->account_name = talloc_strdup(mem_ctx, account_name);
1894         else
1895                 entry->account_name = "";
1896
1897         if (fullname != NULL)
1898                 entry->fullname = talloc_strdup(mem_ctx, fullname);
1899         else
1900                 entry->fullname = "";
1901
1902         if (description != NULL)
1903                 entry->description = talloc_strdup(mem_ctx, description);
1904         else
1905                 entry->description = "";
1906 }
1907
1908 static BOOL user_search_in_progress = False;
1909 struct user_search {
1910         uint16 acct_flags;
1911 };
1912
1913 static BOOL next_entry_users(struct pdb_search *s,
1914                              struct samr_displayentry *entry)
1915 {
1916         struct user_search *state = s->private_data;
1917         struct samu *user = NULL;
1918
1919  next:
1920         if ( !(user = samu_new( NULL )) ) {
1921                 DEBUG(0, ("next_entry_users: samu_new() failed!\n"));
1922                 return False;
1923         }
1924
1925         if (!pdb_getsampwent(user)) {
1926                 TALLOC_FREE(user);
1927                 return False;
1928         }
1929
1930         if ((state->acct_flags != 0) &&
1931             ((pdb_get_acct_ctrl(user) & state->acct_flags) == 0)) {
1932                 TALLOC_FREE(user);
1933                 goto next;
1934         }
1935
1936         fill_displayentry(s->mem_ctx, pdb_get_user_rid(user),
1937                           pdb_get_acct_ctrl(user), pdb_get_username(user),
1938                           pdb_get_fullname(user), pdb_get_acct_desc(user),
1939                           entry);
1940
1941         TALLOC_FREE(user);
1942         return True;
1943 }
1944
1945 static void search_end_users(struct pdb_search *search)
1946 {
1947         pdb_endsampwent();
1948         user_search_in_progress = False;
1949 }
1950
1951 static BOOL pdb_default_search_users(struct pdb_methods *methods,
1952                                      struct pdb_search *search,
1953                                      uint32 acct_flags)
1954 {
1955         struct user_search *state;
1956
1957         if (user_search_in_progress) {
1958                 DEBUG(1, ("user search in progress\n"));
1959                 return False;
1960         }
1961
1962         if (!pdb_setsampwent(False, acct_flags)) {
1963                 DEBUG(5, ("Could not start search\n"));
1964                 return False;
1965         }
1966
1967         user_search_in_progress = True;
1968
1969         state = TALLOC_P(search->mem_ctx, struct user_search);
1970         if (state == NULL) {
1971                 DEBUG(0, ("talloc failed\n"));
1972                 return False;
1973         }
1974
1975         state->acct_flags = acct_flags;
1976
1977         search->private_data = state;
1978         search->next_entry = next_entry_users;
1979         search->search_end = search_end_users;
1980         return True;
1981 }
1982
1983 struct group_search {
1984         GROUP_MAP *groups;
1985         size_t num_groups, current_group;
1986 };
1987
1988 static BOOL next_entry_groups(struct pdb_search *s,
1989                               struct samr_displayentry *entry)
1990 {
1991         struct group_search *state = s->private_data;
1992         uint32 rid;
1993         GROUP_MAP *map = &state->groups[state->current_group];
1994
1995         if (state->current_group == state->num_groups)
1996                 return False;
1997
1998         sid_peek_rid(&map->sid, &rid);
1999
2000         fill_displayentry(s->mem_ctx, rid, 0, map->nt_name, NULL, map->comment,
2001                           entry);
2002
2003         state->current_group += 1;
2004         return True;
2005 }
2006
2007 static void search_end_groups(struct pdb_search *search)
2008 {
2009         struct group_search *state = search->private_data;
2010         SAFE_FREE(state->groups);
2011 }
2012
2013 static BOOL pdb_search_grouptype(struct pdb_search *search,
2014                                  const DOM_SID *sid, enum SID_NAME_USE type)
2015 {
2016         struct group_search *state;
2017
2018         state = TALLOC_P(search->mem_ctx, struct group_search);
2019         if (state == NULL) {
2020                 DEBUG(0, ("talloc failed\n"));
2021                 return False;
2022         }
2023
2024         if (!pdb_enum_group_mapping(sid, type, &state->groups, &state->num_groups,
2025                                     True)) {
2026                 DEBUG(0, ("Could not enum groups\n"));
2027                 return False;
2028         }
2029
2030         state->current_group = 0;
2031         search->private_data = state;
2032         search->next_entry = next_entry_groups;
2033         search->search_end = search_end_groups;
2034         return True;
2035 }
2036
2037 static BOOL pdb_default_search_groups(struct pdb_methods *methods,
2038                                       struct pdb_search *search)
2039 {
2040         return pdb_search_grouptype(search, get_global_sam_sid(), SID_NAME_DOM_GRP);
2041 }
2042
2043 static BOOL pdb_default_search_aliases(struct pdb_methods *methods,
2044                                        struct pdb_search *search,
2045                                        const DOM_SID *sid)
2046 {
2047
2048         return pdb_search_grouptype(search, sid, SID_NAME_ALIAS);
2049 }
2050
2051 static struct samr_displayentry *pdb_search_getentry(struct pdb_search *search,
2052                                                      uint32 idx)
2053 {
2054         if (idx < search->num_entries)
2055                 return &search->cache[idx];
2056
2057         if (search->search_ended)
2058                 return NULL;
2059
2060         while (idx >= search->num_entries) {
2061                 struct samr_displayentry entry;
2062
2063                 if (!search->next_entry(search, &entry)) {
2064                         search->search_end(search);
2065                         search->search_ended = True;
2066                         break;
2067                 }
2068
2069                 ADD_TO_LARGE_ARRAY(search->mem_ctx, struct samr_displayentry,
2070                                    entry, &search->cache, &search->num_entries,
2071                                    &search->cache_size);
2072         }
2073
2074         return (search->num_entries > idx) ? &search->cache[idx] : NULL;
2075 }
2076
2077 struct pdb_search *pdb_search_users(uint32 acct_flags)
2078 {
2079         struct pdb_methods *pdb = pdb_get_methods();
2080         struct pdb_search *result;
2081
2082         if (pdb == NULL) return NULL;
2083
2084         result = pdb_search_init(PDB_USER_SEARCH);
2085         if (result == NULL) return NULL;
2086
2087         if (!pdb->search_users(pdb, result, acct_flags)) {
2088                 talloc_destroy(result->mem_ctx);
2089                 return NULL;
2090         }
2091         return result;
2092 }
2093
2094 struct pdb_search *pdb_search_groups(void)
2095 {
2096         struct pdb_methods *pdb = pdb_get_methods();
2097         struct pdb_search *result;
2098
2099         if (pdb == NULL) return NULL;
2100
2101         result = pdb_search_init(PDB_GROUP_SEARCH);
2102         if (result == NULL) return NULL;
2103
2104         if (!pdb->search_groups(pdb, result)) {
2105                 talloc_destroy(result->mem_ctx);
2106                 return NULL;
2107         }
2108         return result;
2109 }
2110
2111 struct pdb_search *pdb_search_aliases(const DOM_SID *sid)
2112 {
2113         struct pdb_methods *pdb = pdb_get_methods();
2114         struct pdb_search *result;
2115
2116         if (pdb == NULL) return NULL;
2117
2118         result = pdb_search_init(PDB_ALIAS_SEARCH);
2119         if (result == NULL) return NULL;
2120
2121         if (!pdb->search_aliases(pdb, result, sid)) {
2122                 talloc_destroy(result->mem_ctx);
2123                 return NULL;
2124         }
2125         return result;
2126 }
2127
2128 uint32 pdb_search_entries(struct pdb_search *search,
2129                           uint32 start_idx, uint32 max_entries,
2130                           struct samr_displayentry **result)
2131 {
2132         struct samr_displayentry *end_entry;
2133         uint32 end_idx = start_idx+max_entries-1;
2134
2135         /* The first entry needs to be searched after the last. Otherwise the
2136          * first entry might have moved due to a realloc during the search for
2137          * the last entry. */
2138
2139         end_entry = pdb_search_getentry(search, end_idx);
2140         *result = pdb_search_getentry(search, start_idx);
2141
2142         if (end_entry != NULL)
2143                 return max_entries;
2144
2145         if (start_idx >= search->num_entries)
2146                 return 0;
2147
2148         return search->num_entries - start_idx;
2149 }
2150
2151 void pdb_search_destroy(struct pdb_search *search)
2152 {
2153         if (search == NULL)
2154                 return;
2155
2156         if (!search->search_ended)
2157                 search->search_end(search);
2158
2159         talloc_destroy(search->mem_ctx);
2160 }
2161
2162 /*******************************************************************
2163  Create a pdb_methods structure and initialize it with the default
2164  operations.  In this way a passdb module can simply implement
2165  the functionality it cares about.  However, normally this is done
2166  in groups of related functions.
2167 *******************************************************************/
2168
2169 NTSTATUS make_pdb_method( struct pdb_methods **methods )
2170 {
2171         /* allocate memory for the structure as its own talloc CTX */
2172
2173         if ( !(*methods = TALLOC_ZERO_P(NULL, struct pdb_methods) ) ) {
2174                 return NT_STATUS_NO_MEMORY;
2175         }
2176
2177         (*methods)->setsampwent = pdb_default_setsampwent;
2178         (*methods)->endsampwent = pdb_default_endsampwent;
2179         (*methods)->getsampwent = pdb_default_getsampwent;
2180         (*methods)->getsampwnam = pdb_default_getsampwnam;
2181         (*methods)->getsampwsid = pdb_default_getsampwsid;
2182         (*methods)->create_user = pdb_default_create_user;
2183         (*methods)->delete_user = pdb_default_delete_user;
2184         (*methods)->add_sam_account = pdb_default_add_sam_account;
2185         (*methods)->update_sam_account = pdb_default_update_sam_account;
2186         (*methods)->delete_sam_account = pdb_default_delete_sam_account;
2187         (*methods)->rename_sam_account = pdb_default_rename_sam_account;
2188         (*methods)->update_login_attempts = pdb_default_update_login_attempts;
2189
2190         (*methods)->getgrsid = pdb_default_getgrsid;
2191         (*methods)->getgrgid = pdb_default_getgrgid;
2192         (*methods)->getgrnam = pdb_default_getgrnam;
2193         (*methods)->create_dom_group = pdb_default_create_dom_group;
2194         (*methods)->delete_dom_group = pdb_default_delete_dom_group;
2195         (*methods)->add_group_mapping_entry = pdb_default_add_group_mapping_entry;
2196         (*methods)->update_group_mapping_entry = pdb_default_update_group_mapping_entry;
2197         (*methods)->delete_group_mapping_entry = pdb_default_delete_group_mapping_entry;
2198         (*methods)->enum_group_mapping = pdb_default_enum_group_mapping;
2199         (*methods)->enum_group_members = pdb_default_enum_group_members;
2200         (*methods)->enum_group_memberships = pdb_default_enum_group_memberships;
2201         (*methods)->set_unix_primary_group = pdb_default_set_unix_primary_group;
2202         (*methods)->add_groupmem = pdb_default_add_groupmem;
2203         (*methods)->del_groupmem = pdb_default_del_groupmem;
2204         (*methods)->find_alias = pdb_default_find_alias;
2205         (*methods)->create_alias = pdb_default_create_alias;
2206         (*methods)->delete_alias = pdb_default_delete_alias;
2207         (*methods)->get_aliasinfo = pdb_default_get_aliasinfo;
2208         (*methods)->set_aliasinfo = pdb_default_set_aliasinfo;
2209         (*methods)->add_aliasmem = pdb_default_add_aliasmem;
2210         (*methods)->del_aliasmem = pdb_default_del_aliasmem;
2211         (*methods)->enum_aliasmem = pdb_default_enum_aliasmem;
2212         (*methods)->enum_alias_memberships = pdb_default_alias_memberships;
2213         (*methods)->lookup_rids = pdb_default_lookup_rids;
2214         (*methods)->get_account_policy = pdb_default_get_account_policy;
2215         (*methods)->set_account_policy = pdb_default_set_account_policy;
2216         (*methods)->get_seq_num = pdb_default_get_seq_num;
2217         (*methods)->uid_to_rid = pdb_default_uid_to_rid;
2218         (*methods)->gid_to_sid = pdb_default_gid_to_sid;
2219         (*methods)->sid_to_id = pdb_default_sid_to_id;
2220
2221         (*methods)->search_users = pdb_default_search_users;
2222         (*methods)->search_groups = pdb_default_search_groups;
2223         (*methods)->search_aliases = pdb_default_search_aliases;
2224
2225         return NT_STATUS_OK;
2226 }