source/nsswitch/winbindd_ads.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind ADS backend functions
   5
   6    Copyright (C) Andrew Tridgell 2001
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003
   8    Copyright (C) Gerald (Jerry) Carter 2004
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27
  28 #ifdef HAVE_ADS
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_WINBIND
  32
  33 /*
  34   return our ads connections structure for a domain. We keep the connection
  35   open to make things faster
  36 */
  37 static ADS_STRUCT *ads_cached_connection(struct winbindd_domain *domain)
  38 {
  39         ADS_STRUCT *ads;
  40         ADS_STATUS status;
  41
  42         if (domain->private) {
  43                 ads = (ADS_STRUCT *)domain->private;
  44
  45                 /* check for a valid structure */
  46
  47                 DEBUG(7, ("Current tickets expire at %d, time is now %d\n",
  48                           (uint32) ads->auth.expire, (uint32) time(NULL)));
  49                 if ( ads->config.realm && (ads->auth.expire > time(NULL))) {
  50                         return ads;
  51                 }
  52                 else {
  53                         /* we own this ADS_STRUCT so make sure it goes away */
  54                         ads->is_mine = True;
  55                         ads_destroy( &ads );
  56                         ads_kdestroy("MEMORY:winbind_ccache");
  57                         domain->private = NULL;
  58                 }
  59         }
  60
  61         /* we don't want this to affect the users ccache */
  62         setenv("KRB5CCNAME", "MEMORY:winbind_ccache", 1);
  63
  64         ads = ads_init(domain->alt_name, domain->name, NULL);
  65         if (!ads) {
  66                 DEBUG(1,("ads_init for domain %s failed\n", domain->name));
  67                 return NULL;
  68         }
  69
  70         /* the machine acct password might have change - fetch it every time */
  71         SAFE_FREE(ads->auth.password);
  72         ads->auth.password = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
  73
  74         SAFE_FREE(ads->auth.realm);
  75         ads->auth.realm = SMB_STRDUP(lp_realm());
  76
  77         status = ads_connect(ads);
  78         if (!ADS_ERR_OK(status) || !ads->config.realm) {
  79                 extern struct winbindd_methods msrpc_methods, cache_methods;
  80                 DEBUG(1,("ads_connect for domain %s failed: %s\n",
  81                          domain->name, ads_errstr(status)));
  82                 ads_destroy(&ads);
  83
  84                 /* if we get ECONNREFUSED then it might be a NT4
  85                    server, fall back to MSRPC */
  86                 if (status.error_type == ENUM_ADS_ERROR_SYSTEM &&
  87                     status.err.rc == ECONNREFUSED) {
  88                         DEBUG(1,("Trying MSRPC methods\n"));
  89                         if (domain->methods == &cache_methods) {
  90                                 domain->backend = &msrpc_methods;
  91                         } else {
  92                                 domain->methods = &msrpc_methods;
  93                         }
  94                 }
  95                 return NULL;
  96         }
  97
  98         /* set the flag that says we don't own the memory even
  99            though we do so that ads_destroy() won't destroy the
 100            structure we pass back by reference */
 101
 102         ads->is_mine = False;
 103
 104         domain->private = (void *)ads;
 105         return ads;
 106 }
 107
 108
 109 /* Query display info for a realm. This is the basic user list fn */
 110 static NTSTATUS query_user_list(struct winbindd_domain *domain,
 111                                TALLOC_CTX *mem_ctx,
 112                                uint32 *num_entries,
 113                                WINBIND_USERINFO **info)
 114 {
 115         ADS_STRUCT *ads = NULL;
 116         const char *attrs[] = {"userPrincipalName",
 117                                "sAMAccountName",
 118                                "name", "objectSid", "primaryGroupID",
 119                                "sAMAccountType", NULL};
 120         int i, count;
 121         ADS_STATUS rc;
 122         void *res = NULL;
 123         void *msg = NULL;
 124         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 125
 126         *num_entries = 0;
 127
 128         DEBUG(3,("ads: query_user_list\n"));
 129
 130         ads = ads_cached_connection(domain);
 131
 132         if (!ads) {
 133                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 134                 goto done;
 135         }
 136
 137         rc = ads_search_retry(ads, &res, "(objectClass=user)", attrs);
 138         if (!ADS_ERR_OK(rc) || !res) {
 139                 DEBUG(1,("query_user_list ads_search: %s\n", ads_errstr(rc)));
 140                 goto done;
 141         }
 142
 143         count = ads_count_replies(ads, res);
 144         if (count == 0) {
 145                 DEBUG(1,("query_user_list: No users found\n"));
 146                 goto done;
 147         }
 148
 149         (*info) = TALLOC_ZERO_ARRAY(mem_ctx, WINBIND_USERINFO, count);
 150         if (!*info) {
 151                 status = NT_STATUS_NO_MEMORY;
 152                 goto done;
 153         }
 154
 155         i = 0;
 156
 157         for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
 158                 char *name, *gecos;
 159                 DOM_SID sid;
 160                 DOM_SID *sid2;
 161                 DOM_SID *group_sid;
 162                 uint32 group;
 163                 uint32 atype;
 164
 165                 if (!ads_pull_uint32(ads, msg, "sAMAccountType", &atype) ||
 166                     ads_atype_map(atype) != SID_NAME_USER) {
 167                         DEBUG(1,("Not a user account? atype=0x%x\n", atype));
 168                         continue;
 169                 }
 170
 171                 name = ads_pull_username(ads, mem_ctx, msg);
 172                 gecos = ads_pull_string(ads, mem_ctx, msg, "name");
 173                 if (!ads_pull_sid(ads, msg, "objectSid", &sid)) {
 174                         DEBUG(1,("No sid for %s !?\n", name));
 175                         continue;
 176                 }
 177                 if (!ads_pull_uint32(ads, msg, "primaryGroupID", &group)) {
 178                         DEBUG(1,("No primary group for %s !?\n", name));
 179                         continue;
 180                 }
 181
 182                 sid2 = TALLOC_P(mem_ctx, DOM_SID);
 183                 if (!sid2) {
 184                         status = NT_STATUS_NO_MEMORY;
 185                         goto done;
 186                 }
 187
 188                 sid_copy(sid2, &sid);
 189
 190                 group_sid = rid_to_talloced_sid(domain, mem_ctx, group);
 191
 192                 (*info)[i].acct_name = name;
 193                 (*info)[i].full_name = gecos;
 194                 (*info)[i].user_sid = sid2;
 195                 (*info)[i].group_sid = group_sid;
 196                 i++;
 197         }
 198
 199         (*num_entries) = i;
 200         status = NT_STATUS_OK;
 201
 202         DEBUG(3,("ads query_user_list gave %d entries\n", (*num_entries)));
 203
 204 done:
 205         if (res)
 206                 ads_msgfree(ads, res);
 207
 208         return status;
 209 }
 210
 211 /* list all domain groups */
 212 static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
 213                                 TALLOC_CTX *mem_ctx,
 214                                 uint32 *num_entries,
 215                                 struct acct_info **info)
 216 {
 217         ADS_STRUCT *ads = NULL;
 218         const char *attrs[] = {"userPrincipalName", "sAMAccountName",
 219                                "name", "objectSid",
 220                                "sAMAccountType", NULL};
 221         int i, count;
 222         ADS_STATUS rc;
 223         void *res = NULL;
 224         void *msg = NULL;
 225         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 226         uint32 group_flags;
 227
 228         *num_entries = 0;
 229
 230         DEBUG(3,("ads: enum_dom_groups\n"));
 231
 232         ads = ads_cached_connection(domain);
 233
 234         if (!ads) {
 235                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 236                 goto done;
 237         }
 238
 239         rc = ads_search_retry(ads, &res, "(objectCategory=group)", attrs);
 240         if (!ADS_ERR_OK(rc) || !res) {
 241                 DEBUG(1,("enum_dom_groups ads_search: %s\n", ads_errstr(rc)));
 242                 goto done;
 243         }
 244
 245         count = ads_count_replies(ads, res);
 246         if (count == 0) {
 247                 DEBUG(1,("enum_dom_groups: No groups found\n"));
 248                 goto done;
 249         }
 250
 251         (*info) = TALLOC_ZERO_ARRAY(mem_ctx, struct acct_info, count);
 252         if (!*info) {
 253                 status = NT_STATUS_NO_MEMORY;
 254                 goto done;
 255         }
 256
 257         i = 0;
 258
 259         group_flags = ATYPE_GLOBAL_GROUP;
 260
 261         /* only grab domain local groups for our domain */
 262         if ( domain->native_mode && strequal(lp_realm(), domain->alt_name)  )
 263                 group_flags |= ATYPE_LOCAL_GROUP;
 264
 265         for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
 266                 char *name, *gecos;
 267                 DOM_SID sid;
 268                 uint32 rid;
 269                 uint32 account_type;
 270
 271                 if (!ads_pull_uint32(ads, msg, "sAMAccountType", &account_type) || !(account_type & group_flags) )
 272                         continue;
 273
 274                 name = ads_pull_username(ads, mem_ctx, msg);
 275                 gecos = ads_pull_string(ads, mem_ctx, msg, "name");
 276                 if (!ads_pull_sid(ads, msg, "objectSid", &sid)) {
 277                         DEBUG(1,("No sid for %s !?\n", name));
 278                         continue;
 279                 }
 280
 281                 if (!sid_peek_check_rid(&domain->sid, &sid, &rid)) {
 282                         DEBUG(1,("No rid for %s !?\n", name));
 283                         continue;
 284                 }
 285
 286                 fstrcpy((*info)[i].acct_name, name);
 287                 fstrcpy((*info)[i].acct_desc, gecos);
 288                 (*info)[i].rid = rid;
 289                 i++;
 290         }
 291
 292         (*num_entries) = i;
 293
 294         status = NT_STATUS_OK;
 295
 296         DEBUG(3,("ads enum_dom_groups gave %d entries\n", (*num_entries)));
 297
 298 done:
 299         if (res)
 300                 ads_msgfree(ads, res);
 301
 302         return status;
 303 }
 304
 305 /* list all domain local groups */
 306 static NTSTATUS enum_local_groups(struct winbindd_domain *domain,
 307                                 TALLOC_CTX *mem_ctx,
 308                                 uint32 *num_entries,
 309                                 struct acct_info **info)
 310 {
 311         /*
 312          * This is a stub function only as we returned the domain
 313          * local groups in enum_dom_groups() if the domain->native field
 314          * was true.  This is a simple performance optimization when
 315          * using LDAP.
 316          *
 317          * if we ever need to enumerate domain local groups separately,
 318          * then this the optimization in enum_dom_groups() will need
 319          * to be split out
 320          */
 321         *num_entries = 0;
 322
 323         return NT_STATUS_OK;
 324 }
 325
 326 /* convert a DN to a name, SID and name type
 327    this might become a major speed bottleneck if groups have
 328    lots of users, in which case we could cache the results
 329 */
 330 static BOOL dn_lookup(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx,
 331                       const char *dn,
 332                       char **name, uint32 *name_type, DOM_SID *sid)
 333 {
 334         void *res = NULL;
 335         const char *attrs[] = {"userPrincipalName", "sAMAccountName",
 336                                "objectSid", "sAMAccountType", NULL};
 337         ADS_STATUS rc;
 338         uint32 atype;
 339         DEBUG(3,("ads: dn_lookup\n"));
 340
 341         rc = ads_search_retry_dn(ads, &res, dn, attrs);
 342
 343         if (!ADS_ERR_OK(rc) || !res) {
 344                 goto failed;
 345         }
 346
 347         (*name) = ads_pull_username(ads, mem_ctx, res);
 348
 349         if (!ads_pull_uint32(ads, res, "sAMAccountType", &atype)) {
 350                 goto failed;
 351         }
 352         (*name_type) = ads_atype_map(atype);
 353
 354         if (!ads_pull_sid(ads, res, "objectSid", sid)) {
 355                 goto failed;
 356         }
 357
 358         if (res)
 359                 ads_msgfree(ads, res);
 360
 361         return True;
 362
 363 failed:
 364         if (res)
 365                 ads_msgfree(ads, res);
 366
 367         return False;
 368 }
 369
 370 /* Lookup user information from a rid */
 371 static NTSTATUS query_user(struct winbindd_domain *domain,
 372                            TALLOC_CTX *mem_ctx,
 373                            const DOM_SID *sid,
 374                            WINBIND_USERINFO *info)
 375 {
 376         ADS_STRUCT *ads = NULL;
 377         const char *attrs[] = {"userPrincipalName",
 378                                "sAMAccountName",
 379                                "name",
 380                                "primaryGroupID", NULL};
 381         ADS_STATUS rc;
 382         int count;
 383         void *msg = NULL;
 384         char *ldap_exp;
 385         char *sidstr;
 386         uint32 group_rid;
 387         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 388         DOM_SID *sid2;
 389         fstring sid_string;
 390
 391         DEBUG(3,("ads: query_user\n"));
 392
 393         ads = ads_cached_connection(domain);
 394
 395         if (!ads) {
 396                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 397                 goto done;
 398         }
 399
 400         sidstr = sid_binstring(sid);
 401         asprintf(&ldap_exp, "(objectSid=%s)", sidstr);
 402         rc = ads_search_retry(ads, &msg, ldap_exp, attrs);
 403         free(ldap_exp);
 404         free(sidstr);
 405         if (!ADS_ERR_OK(rc) || !msg) {
 406                 DEBUG(1,("query_user(sid=%s) ads_search: %s\n", sid_to_string(sid_string, sid), ads_errstr(rc)));
 407                 goto done;
 408         }
 409
 410         count = ads_count_replies(ads, msg);
 411         if (count != 1) {
 412                 DEBUG(1,("query_user(sid=%s): Not found\n", sid_to_string(sid_string, sid)));
 413                 goto done;
 414         }
 415
 416         info->acct_name = ads_pull_username(ads, mem_ctx, msg);
 417         info->full_name = ads_pull_string(ads, mem_ctx, msg, "name");
 418
 419         if (!ads_pull_uint32(ads, msg, "primaryGroupID", &group_rid)) {
 420                 DEBUG(1,("No primary group for %s !?\n", sid_to_string(sid_string, sid)));
 421                 goto done;
 422         }
 423
 424         sid2 = TALLOC_P(mem_ctx, DOM_SID);
 425         if (!sid2) {
 426                 status = NT_STATUS_NO_MEMORY;
 427                 goto done;
 428         }
 429         sid_copy(sid2, sid);
 430
 431         info->user_sid = sid2;
 432
 433         info->group_sid = rid_to_talloced_sid(domain, mem_ctx, group_rid);
 434
 435         status = NT_STATUS_OK;
 436
 437         DEBUG(3,("ads query_user gave %s\n", info->acct_name));
 438 done:
 439         if (msg)
 440                 ads_msgfree(ads, msg);
 441
 442         return status;
 443 }
 444
 445 /* Lookup groups a user is a member of - alternate method, for when
 446    tokenGroups are not available. */
 447 static NTSTATUS lookup_usergroups_alt(struct winbindd_domain *domain,
 448                                       TALLOC_CTX *mem_ctx,
 449                                       const char *user_dn,
 450                                       DOM_SID *primary_group,
 451                                       uint32 *num_groups, DOM_SID ***user_gids)
 452 {
 453         ADS_STATUS rc;
 454         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 455         int count;
 456         void *res = NULL;
 457         void *msg = NULL;
 458         char *ldap_exp;
 459         ADS_STRUCT *ads;
 460         const char *group_attrs[] = {"objectSid", NULL};
 461         char *escaped_dn;
 462
 463         DEBUG(3,("ads: lookup_usergroups_alt\n"));
 464
 465         ads = ads_cached_connection(domain);
 466
 467         if (!ads) {
 468                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 469                 goto done;
 470         }
 471
 472         if (!(escaped_dn = escape_ldap_string_alloc(user_dn))) {
 473                 status = NT_STATUS_NO_MEMORY;
 474                 goto done;
 475         }
 476
 477         /* buggy server, no tokenGroups.  Instead lookup what groups this user
 478            is a member of by DN search on member*/
 479
 480         if (!(ldap_exp = talloc_asprintf(mem_ctx, "(&(member=%s)(objectClass=group))", escaped_dn))) {
 481                 DEBUG(1,("lookup_usergroups(dn=%s) asprintf failed!\n", user_dn));
 482                 SAFE_FREE(escaped_dn);
 483                 status = NT_STATUS_NO_MEMORY;
 484                 goto done;
 485         }
 486
 487         SAFE_FREE(escaped_dn);
 488
 489         rc = ads_search_retry(ads, &res, ldap_exp, group_attrs);
 490
 491         if (!ADS_ERR_OK(rc) || !res) {
 492                 DEBUG(1,("lookup_usergroups ads_search member=%s: %s\n", user_dn, ads_errstr(rc)));
 493                 return ads_ntstatus(rc);
 494         }
 495
 496         count = ads_count_replies(ads, res);
 497         if (count == 0) {
 498                 DEBUG(5,("lookup_usergroups: No supp groups found\n"));
 499
 500                 status = ads_ntstatus(rc);
 501                 goto done;
 502         }
 503
 504         (*user_gids) = TALLOC_ZERO_ARRAY(mem_ctx, DOM_SID *, count + 1);
 505         (*user_gids)[0] = primary_group;
 506
 507         *num_groups = 1;
 508
 509         for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
 510                 DOM_SID group_sid;
 511
 512                 if (!ads_pull_sid(ads, msg, "objectSid", &group_sid)) {
 513                         DEBUG(1,("No sid for this group ?!?\n"));
 514                         continue;
 515                 }
 516
 517                 if (sid_equal(&group_sid, primary_group)) continue;
 518
 519                 (*user_gids)[*num_groups] = TALLOC_P(mem_ctx, DOM_SID);
 520                 if (!(*user_gids)[*num_groups]) {
 521                         status = NT_STATUS_NO_MEMORY;
 522                         goto done;
 523                 }
 524
 525                 sid_copy((*user_gids)[*num_groups], &group_sid);
 526
 527                 (*num_groups)++;
 528
 529         }
 530
 531         status = NT_STATUS_OK;
 532
 533         DEBUG(3,("ads lookup_usergroups (alt) for dn=%s\n", user_dn));
 534 done:
 535         if (res)
 536                 ads_msgfree(ads, res);
 537
 538         return status;
 539 }
 540
 541 /* Lookup groups a user is a member of. */
 542 static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
 543                                   TALLOC_CTX *mem_ctx,
 544                                   const DOM_SID *sid,
 545                                   uint32 *num_groups, DOM_SID ***user_gids)
 546 {
 547         ADS_STRUCT *ads = NULL;
 548         const char *attrs[] = {"tokenGroups", "primaryGroupID", NULL};
 549         ADS_STATUS rc;
 550         int count;
 551         LDAPMessage *msg = NULL;
 552         char *user_dn;
 553         DOM_SID *sids;
 554         int i;
 555         DOM_SID *primary_group;
 556         uint32 primary_group_rid;
 557         fstring sid_string;
 558         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 559
 560         DEBUG(3,("ads: lookup_usergroups\n"));
 561         *num_groups = 0;
 562
 563         ads = ads_cached_connection(domain);
 564
 565         if (!ads) {
 566                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 567                 status = NT_STATUS_SERVER_DISABLED;
 568                 goto done;
 569         }
 570
 571         rc = ads_sid_to_dn(ads, mem_ctx, sid, &user_dn);
 572         if (!ADS_ERR_OK(rc)) {
 573                 status = ads_ntstatus(rc);
 574                 goto done;
 575         }
 576
 577         rc = ads_search_retry_dn(ads, (void**)&msg, user_dn, attrs);
 578         if (!ADS_ERR_OK(rc)) {
 579                 status = ads_ntstatus(rc);
 580                 DEBUG(1,("lookup_usergroups(sid=%s) ads_search tokenGroups: %s\n",
 581                          sid_to_string(sid_string, sid), ads_errstr(rc)));
 582                 goto done;
 583         }
 584
 585         if (!msg) {
 586                 DEBUG(1,("lookup_usergroups(sid=%s) ads_search tokenGroups: NULL msg\n",
 587                          sid_to_string(sid_string, sid)));
 588                 status = NT_STATUS_UNSUCCESSFUL;
 589                 goto done;
 590         }
 591
 592         if (!ads_pull_uint32(ads, msg, "primaryGroupID", &primary_group_rid)) {
 593                 DEBUG(1,("%s: No primary group for sid=%s !?\n",
 594                          domain->name, sid_to_string(sid_string, sid)));
 595                 goto done;
 596         }
 597
 598         primary_group = rid_to_talloced_sid(domain, mem_ctx, primary_group_rid);
 599
 600         count = ads_pull_sids(ads, mem_ctx, msg, "tokenGroups", &sids);
 601
 602         if (msg)
 603                 ads_msgfree(ads, msg);
 604
 605         /* there must always be at least one group in the token,
 606            unless we are talking to a buggy Win2k server */
 607         if (count == 0) {
 608                 return lookup_usergroups_alt(domain, mem_ctx, user_dn,
 609                                              primary_group,
 610                                              num_groups, user_gids);
 611         }
 612
 613         (*user_gids) = TALLOC_ZERO_ARRAY(mem_ctx, DOM_SID *, count + 1);
 614         (*user_gids)[0] = primary_group;
 615
 616         *num_groups = 1;
 617
 618         for (i=0;i<count;i++) {
 619                 if (sid_equal(&sids[i], primary_group)) continue;
 620
 621                 (*user_gids)[*num_groups] = TALLOC_P(mem_ctx, DOM_SID);
 622                 if (!(*user_gids)[*num_groups]) {
 623                         status = NT_STATUS_NO_MEMORY;
 624                         goto done;
 625                 }
 626
 627                 sid_copy((*user_gids)[*num_groups], &sids[i]);
 628                 (*num_groups)++;
 629         }
 630
 631         status = NT_STATUS_OK;
 632         DEBUG(3,("ads lookup_usergroups for sid=%s\n", sid_to_string(sid_string, sid)));
 633 done:
 634         return status;
 635 }
 636
 637 /*
 638   find the members of a group, given a group rid and domain
 639  */
 640 static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
 641                                 TALLOC_CTX *mem_ctx,
 642                                 const DOM_SID *group_sid, uint32 *num_names,
 643                                 DOM_SID ***sid_mem, char ***names,
 644                                 uint32 **name_types)
 645 {
 646         ADS_STATUS rc;
 647         int count;
 648         void *res=NULL;
 649         ADS_STRUCT *ads = NULL;
 650         char *ldap_exp;
 651         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 652         char *sidstr;
 653         char **members;
 654         int i;
 655         size_t num_members;
 656         fstring sid_string;
 657         BOOL more_values;
 658         const char **attrs;
 659         uint32 first_usn;
 660         uint32 current_usn;
 661         int num_retries = 0;
 662
 663         DEBUG(10,("ads: lookup_groupmem %s sid=%s\n", domain->name,
 664                   sid_string_static(group_sid)));
 665
 666         *num_names = 0;
 667
 668         ads = ads_cached_connection(domain);
 669
 670         if (!ads) {
 671                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 672                 goto done;
 673         }
 674
 675         sidstr = sid_binstring(group_sid);
 676
 677         /* search for all members of the group */
 678         if (!(ldap_exp = talloc_asprintf(mem_ctx, "(objectSid=%s)",sidstr))) {
 679                 SAFE_FREE(sidstr);
 680                 DEBUG(1, ("ads: lookup_groupmem: tallloc_asprintf for ldap_exp failed!\n"));
 681                 status = NT_STATUS_NO_MEMORY;
 682                 goto done;
 683         }
 684         SAFE_FREE(sidstr);
 685
 686         members = NULL;
 687         num_members = 0;
 688
 689         attrs = TALLOC_ARRAY(mem_ctx, const char *, 3);
 690         attrs[1] = talloc_strdup(mem_ctx, "usnChanged");
 691         attrs[2] = NULL;
 692
 693         do {
 694                 if (num_members == 0)
 695                         attrs[0] = talloc_strdup(mem_ctx, "member");
 696
 697                 DEBUG(10, ("Searching for attrs[0] = %s, attrs[1] = %s\n", attrs[0], attrs[1]));
 698
 699                 rc = ads_search_retry(ads, &res, ldap_exp, attrs);
 700
 701                 if (!ADS_ERR_OK(rc) || !res) {
 702                         DEBUG(1,("ads: lookup_groupmem ads_search: %s\n",
 703                                  ads_errstr(rc)));
 704                         status = ads_ntstatus(rc);
 705                         goto done;
 706                 }
 707
 708                 count = ads_count_replies(ads, res);
 709                 if (count == 0)
 710                         break;
 711
 712                 if (num_members == 0) {
 713                         if (!ads_pull_uint32(ads, res, "usnChanged", &first_usn)) {
 714                                 DEBUG(1, ("ads: lookup_groupmem could not pull usnChanged!\n"));
 715                                 goto done;
 716                         }
 717                 }
 718
 719                 if (!ads_pull_uint32(ads, res, "usnChanged", &current_usn)) {
 720                         DEBUG(1, ("ads: lookup_groupmem could not pull usnChanged!\n"));
 721                         goto done;
 722                 }
 723
 724                 if (first_usn != current_usn) {
 725                         DEBUG(5, ("ads: lookup_groupmem USN on this record changed"
 726                                   " - restarting search\n"));
 727                         if (num_retries < 5) {
 728                                 num_retries++;
 729                                 num_members = 0;
 730                                 continue;
 731                         } else {
 732                                 DEBUG(5, ("ads: lookup_groupmem USN on this record changed"
 733                                           " - restarted search too many times, aborting!\n"));
 734                                 status = NT_STATUS_UNSUCCESSFUL;
 735                                 goto done;
 736                         }
 737                 }
 738
 739                 members = ads_pull_strings_range(ads, mem_ctx, res,
 740                                                  "member",
 741                                                  members,
 742                                                  &attrs[0],
 743                                                  &num_members,
 744                                                  &more_values);
 745
 746                 if ((members == NULL) || (num_members == 0))
 747                         break;
 748
 749         } while (more_values);
 750
 751         /* now we need to turn a list of members into rids, names and name types
 752            the problem is that the members are in the form of distinguised names
 753         */
 754
 755         (*sid_mem) = TALLOC_ZERO_ARRAY(mem_ctx, DOM_SID *, num_members);
 756         (*name_types) = TALLOC_ZERO_ARRAY(mem_ctx, uint32, num_members);
 757         (*names) = TALLOC_ZERO_ARRAY(mem_ctx, char *, num_members);
 758
 759         for (i=0;i<num_members;i++) {
 760                 uint32 name_type;
 761                 char *name;
 762                 DOM_SID sid;
 763
 764                 if (dn_lookup(ads, mem_ctx, members[i], &name, &name_type, &sid)) {
 765                     (*names)[*num_names] = name;
 766                     (*name_types)[*num_names] = name_type;
 767                     (*sid_mem)[*num_names] = TALLOC_P(mem_ctx, DOM_SID);
 768                     if (!(*sid_mem)[*num_names]) {
 769                             status = NT_STATUS_NO_MEMORY;
 770                             goto done;
 771                     }
 772                     sid_copy((*sid_mem)[*num_names], &sid);
 773                     (*num_names)++;
 774                 }
 775         }
 776
 777         status = NT_STATUS_OK;
 778         DEBUG(3,("ads lookup_groupmem for sid=%s\n", sid_to_string(sid_string, group_sid)));
 779 done:
 780
 781         if (res)
 782                 ads_msgfree(ads, res);
 783
 784         return status;
 785 }
 786
 787 /* find the sequence number for a domain */
 788 static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
 789 {
 790         ADS_STRUCT *ads = NULL;
 791         ADS_STATUS rc;
 792
 793         DEBUG(3,("ads: fetch sequence_number for %s\n", domain->name));
 794
 795         *seq = DOM_SEQUENCE_NONE;
 796
 797         ads = ads_cached_connection(domain);
 798
 799         if (!ads) {
 800                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 801                 return NT_STATUS_UNSUCCESSFUL;
 802         }
 803
 804         rc = ads_USN(ads, seq);
 805
 806         if (!ADS_ERR_OK(rc)) {
 807
 808                 /* its a dead connection ; don't destroy it
 809                    through since ads_USN() has already done
 810                    that indirectly */
 811
 812                 domain->private = NULL;
 813         }
 814         return ads_ntstatus(rc);
 815 }
 816
 817 /* get a list of trusted domains */
 818 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
 819                                 TALLOC_CTX *mem_ctx,
 820                                 uint32 *num_domains,
 821                                 char ***names,
 822                                 char ***alt_names,
 823                                 DOM_SID **dom_sids)
 824 {
 825         NTSTATUS                result = NT_STATUS_UNSUCCESSFUL;
 826         struct ds_domain_trust  *domains = NULL;
 827         int                     count = 0;
 828         int                     i;
 829         struct cli_state        *cli = NULL;
 830                                 /* i think we only need our forest and downlevel trusted domains */
 831         uint32                  flags = DS_DOMAIN_IN_FOREST | DS_DOMAIN_DIRECT_OUTBOUND;
 832
 833         DEBUG(3,("ads: trusted_domains\n"));
 834
 835         *num_domains = 0;
 836         *alt_names   = NULL;
 837         *names       = NULL;
 838         *dom_sids    = NULL;
 839
 840         if ( !NT_STATUS_IS_OK(result = cm_fresh_connection(domain, PI_NETLOGON, &cli)) ) {
 841                 DEBUG(5, ("trusted_domains: Could not open a connection to %s for PIPE_NETLOGON (%s)\n",
 842                           domain->name, nt_errstr(result)));
 843                 return NT_STATUS_UNSUCCESSFUL;
 844         }
 845
 846         if ( NT_STATUS_IS_OK(result) )
 847                 result = cli_ds_enum_domain_trusts( cli, mem_ctx, cli->desthost,
 848                                                     flags, &domains, (unsigned int *)&count );
 849
 850         if ( NT_STATUS_IS_OK(result) && count) {
 851
 852                 /* Allocate memory for trusted domain names and sids */
 853
 854                 if ( !(*names = TALLOC_ARRAY(mem_ctx, char *, count)) ) {
 855                         DEBUG(0, ("trusted_domains: out of memory\n"));
 856                         result = NT_STATUS_NO_MEMORY;
 857                         goto done;
 858                 }
 859
 860                 if ( !(*alt_names = TALLOC_ARRAY(mem_ctx, char *, count)) ) {
 861                         DEBUG(0, ("trusted_domains: out of memory\n"));
 862                         result = NT_STATUS_NO_MEMORY;
 863                         goto done;
 864                 }
 865
 866                 if ( !(*dom_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, count)) ) {
 867                         DEBUG(0, ("trusted_domains: out of memory\n"));
 868                         result = NT_STATUS_NO_MEMORY;
 869                         goto done;
 870                 }
 871
 872                 /* Copy across names and sids */
 873
 874                 for (i = 0; i < count; i++) {
 875                         (*names)[i] = domains[i].netbios_domain;
 876                         (*alt_names)[i] = domains[i].dns_domain;
 877
 878                         sid_copy(&(*dom_sids)[i], &domains[i].sid);
 879                 }
 880
 881                 *num_domains = count;
 882         }
 883
 884 done:
 885
 886         /* remove connection;  This is a special case to the \NETLOGON pipe */
 887
 888         if ( cli )
 889                 cli_shutdown( cli );
 890
 891         return result;
 892 }
 893
 894 /* find the domain sid for a domain */
 895 static NTSTATUS domain_sid(struct winbindd_domain *domain, DOM_SID *sid)
 896 {
 897         ADS_STRUCT *ads;
 898         ADS_STATUS rc;
 899
 900         DEBUG(3,("ads: domain_sid\n"));
 901
 902         ads = ads_cached_connection(domain);
 903
 904         if (!ads) {
 905                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 906                 return NT_STATUS_UNSUCCESSFUL;
 907         }
 908
 909         rc = ads_domain_sid(ads, sid);
 910
 911         if (!ADS_ERR_OK(rc)) {
 912
 913                 /* its a dead connection; don't destroy it though
 914                    since that has already been done indirectly
 915                    by ads_domain_sid() */
 916
 917                 domain->private = NULL;
 918         }
 919
 920         return ads_ntstatus(rc);
 921 }
 922
 923
 924 /* find alternate names list for the domain - for ADS this is the
 925    netbios name */
 926 static NTSTATUS alternate_name(struct winbindd_domain *domain)
 927 {
 928         ADS_STRUCT *ads;
 929         ADS_STATUS rc;
 930         TALLOC_CTX *ctx;
 931         const char *workgroup;
 932
 933         DEBUG(3,("ads: alternate_name\n"));
 934
 935         ads = ads_cached_connection(domain);
 936
 937         if (!ads) {
 938                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 939                 return NT_STATUS_UNSUCCESSFUL;
 940         }
 941
 942         if (!(ctx = talloc_init("alternate_name"))) {
 943                 return NT_STATUS_NO_MEMORY;
 944         }
 945
 946         rc = ads_workgroup_name(ads, ctx, &workgroup);
 947
 948         if (ADS_ERR_OK(rc)) {
 949                 fstrcpy(domain->name, workgroup);
 950                 fstrcpy(domain->alt_name, ads->config.realm);
 951                 strupper_m(domain->alt_name);
 952                 strupper_m(domain->name);
 953         }
 954
 955         talloc_destroy(ctx);
 956
 957         return ads_ntstatus(rc);
 958 }
 959
 960 /* the ADS backend methods are exposed via this structure */
 961 struct winbindd_methods ads_methods = {
 962         True,
 963         query_user_list,
 964         enum_dom_groups,
 965         enum_local_groups,
 966         msrpc_name_to_sid,
 967         msrpc_sid_to_name,
 968         query_user,
 969         lookup_usergroups,
 970         msrpc_lookup_useraliases,
 971         lookup_groupmem,
 972         sequence_number,
 973         trusted_domains,
 974         domain_sid,
 975         alternate_name
 976 };
 977
 978 #endif