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_data) {
  43                 ads = (ADS_STRUCT *)domain->private_data;
  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_data = 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         if (use_nss_info("sfu") && (!ads_check_sfu_mapping(ads))) {
  99                 DEBUG(0,("ads_cached_connection: failed to check sfu attributes\n"));
 100                 return NULL;
 101         }
 102
 103         /* set the flag that says we don't own the memory even
 104            though we do so that ads_destroy() won't destroy the
 105            structure we pass back by reference */
 106
 107         ads->is_mine = False;
 108
 109         domain->private_data = (void *)ads;
 110         return ads;
 111 }
 112
 113
 114 /* Query display info for a realm. This is the basic user list fn */
 115 static NTSTATUS query_user_list(struct winbindd_domain *domain,
 116                                TALLOC_CTX *mem_ctx,
 117                                uint32 *num_entries,
 118                                WINBIND_USERINFO **info)
 119 {
 120         ADS_STRUCT *ads = NULL;
 121         const char *attrs[] = {"userPrincipalName",
 122                                "sAMAccountName",
 123                                "name", "objectSid", "primaryGroupID",
 124                                "sAMAccountType",
 125                                ADS_ATTR_SFU_HOMEDIR_OID,
 126                                ADS_ATTR_SFU_SHELL_OID,
 127                                NULL};
 128         int i, count;
 129         ADS_STATUS rc;
 130         void *res = NULL;
 131         void *msg = NULL;
 132         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 133
 134         *num_entries = 0;
 135
 136         DEBUG(3,("ads: query_user_list\n"));
 137
 138         ads = ads_cached_connection(domain);
 139
 140         if (!ads) {
 141                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 142                 goto done;
 143         }
 144
 145         rc = ads_search_retry(ads, &res, "(objectClass=user)", attrs);
 146         if (!ADS_ERR_OK(rc) || !res) {
 147                 DEBUG(1,("query_user_list ads_search: %s\n", ads_errstr(rc)));
 148                 goto done;
 149         }
 150
 151         count = ads_count_replies(ads, res);
 152         if (count == 0) {
 153                 DEBUG(1,("query_user_list: No users found\n"));
 154                 goto done;
 155         }
 156
 157         (*info) = TALLOC_ZERO_ARRAY(mem_ctx, WINBIND_USERINFO, count);
 158         if (!*info) {
 159                 status = NT_STATUS_NO_MEMORY;
 160                 goto done;
 161         }
 162
 163         i = 0;
 164
 165         for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
 166                 char *name, *gecos;
 167                 char *homedir = NULL;
 168                 char *shell = NULL;
 169                 uint32 group;
 170                 uint32 atype;
 171
 172                 if (!ads_pull_uint32(ads, msg, "sAMAccountType", &atype) ||
 173                     ads_atype_map(atype) != SID_NAME_USER) {
 174                         DEBUG(1,("Not a user account? atype=0x%x\n", atype));
 175                         continue;
 176                 }
 177
 178                 name = ads_pull_username(ads, mem_ctx, msg);
 179                 gecos = ads_pull_string(ads, mem_ctx, msg, "name");
 180                 if (use_nss_info("sfu")) {
 181                         homedir = ads_pull_string(ads, mem_ctx, msg, ads->schema.sfu_homedir_attr);
 182                         shell = ads_pull_string(ads, mem_ctx, msg, ads->schema.sfu_shell_attr);
 183                 }
 184
 185                 if (!ads_pull_sid(ads, msg, "objectSid",
 186                                   &(*info)[i].user_sid)) {
 187                         DEBUG(1,("No sid for %s !?\n", name));
 188                         continue;
 189                 }
 190                 if (!ads_pull_uint32(ads, msg, "primaryGroupID", &group)) {
 191                         DEBUG(1,("No primary group for %s !?\n", name));
 192                         continue;
 193                 }
 194
 195                 (*info)[i].acct_name = name;
 196                 (*info)[i].full_name = gecos;
 197                 (*info)[i].homedir = homedir;
 198                 (*info)[i].shell = shell;
 199                 sid_compose(&(*info)[i].group_sid, &domain->sid, group);
 200                 i++;
 201         }
 202
 203         (*num_entries) = i;
 204         status = NT_STATUS_OK;
 205
 206         DEBUG(3,("ads query_user_list gave %d entries\n", (*num_entries)));
 207
 208 done:
 209         if (res)
 210                 ads_msgfree(ads, res);
 211
 212         return status;
 213 }
 214
 215 /* list all domain groups */
 216 static NTSTATUS enum_dom_groups(struct winbindd_domain *domain,
 217                                 TALLOC_CTX *mem_ctx,
 218                                 uint32 *num_entries,
 219                                 struct acct_info **info)
 220 {
 221         ADS_STRUCT *ads = NULL;
 222         const char *attrs[] = {"userPrincipalName", "sAMAccountName",
 223                                "name", "objectSid",
 224                                "sAMAccountType", NULL};
 225         int i, count;
 226         ADS_STATUS rc;
 227         void *res = NULL;
 228         void *msg = NULL;
 229         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 230         uint32 group_flags;
 231
 232         *num_entries = 0;
 233
 234         DEBUG(3,("ads: enum_dom_groups\n"));
 235
 236         ads = ads_cached_connection(domain);
 237
 238         if (!ads) {
 239                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 240                 goto done;
 241         }
 242
 243         rc = ads_search_retry(ads, &res, "(objectCategory=group)", attrs);
 244         if (!ADS_ERR_OK(rc) || !res) {
 245                 DEBUG(1,("enum_dom_groups ads_search: %s\n", ads_errstr(rc)));
 246                 goto done;
 247         }
 248
 249         count = ads_count_replies(ads, res);
 250         if (count == 0) {
 251                 DEBUG(1,("enum_dom_groups: No groups found\n"));
 252                 goto done;
 253         }
 254
 255         (*info) = TALLOC_ZERO_ARRAY(mem_ctx, struct acct_info, count);
 256         if (!*info) {
 257                 status = NT_STATUS_NO_MEMORY;
 258                 goto done;
 259         }
 260
 261         i = 0;
 262
 263         group_flags = ATYPE_GLOBAL_GROUP;
 264
 265         /* only grab domain local groups for our domain */
 266         if ( domain->native_mode && strequal(lp_realm(), domain->alt_name)  )
 267                 group_flags |= ATYPE_LOCAL_GROUP;
 268
 269         for (msg = ads_first_entry(ads, res); msg; msg = ads_next_entry(ads, msg)) {
 270                 char *name, *gecos;
 271                 DOM_SID sid;
 272                 uint32 rid;
 273                 uint32 account_type;
 274
 275                 if (!ads_pull_uint32(ads, msg, "sAMAccountType", &account_type) || !(account_type & group_flags) )
 276                         continue;
 277
 278                 name = ads_pull_username(ads, mem_ctx, msg);
 279                 gecos = ads_pull_string(ads, mem_ctx, msg, "name");
 280                 if (!ads_pull_sid(ads, msg, "objectSid", &sid)) {
 281                         DEBUG(1,("No sid for %s !?\n", name));
 282                         continue;
 283                 }
 284
 285                 if (sid_check_is_in_builtin(&sid))
 286                         continue;
 287
 288                 if (!sid_peek_check_rid(&domain->sid, &sid, &rid)) {
 289                         DEBUG(1,("No rid for %s !?\n", name));
 290                         continue;
 291                 }
 292
 293                 fstrcpy((*info)[i].acct_name, name);
 294                 fstrcpy((*info)[i].acct_desc, gecos);
 295                 (*info)[i].rid = rid;
 296                 i++;
 297         }
 298
 299         (*num_entries) = i;
 300
 301         status = NT_STATUS_OK;
 302
 303         DEBUG(3,("ads enum_dom_groups gave %d entries\n", (*num_entries)));
 304
 305 done:
 306         if (res)
 307                 ads_msgfree(ads, res);
 308
 309         return status;
 310 }
 311
 312 /* list all domain local groups */
 313 static NTSTATUS enum_local_groups(struct winbindd_domain *domain,
 314                                 TALLOC_CTX *mem_ctx,
 315                                 uint32 *num_entries,
 316                                 struct acct_info **info)
 317 {
 318         /*
 319          * This is a stub function only as we returned the domain
 320          * local groups in enum_dom_groups() if the domain->native field
 321          * was true.  This is a simple performance optimization when
 322          * using LDAP.
 323          *
 324          * if we ever need to enumerate domain local groups separately,
 325          * then this the optimization in enum_dom_groups() will need
 326          * to be split out
 327          */
 328         *num_entries = 0;
 329
 330         return NT_STATUS_OK;
 331 }
 332
 333 /* convert a DN to a name, SID and name type
 334    this might become a major speed bottleneck if groups have
 335    lots of users, in which case we could cache the results
 336 */
 337 static BOOL dn_lookup(ADS_STRUCT *ads, TALLOC_CTX *mem_ctx,
 338                       const char *dn,
 339                       char **name, uint32 *name_type, DOM_SID *sid)
 340 {
 341         void *res = NULL;
 342         const char *attrs[] = {"userPrincipalName", "sAMAccountName",
 343                                "objectSid", "sAMAccountType", NULL};
 344         ADS_STATUS rc;
 345         uint32 atype;
 346         DEBUG(3,("ads: dn_lookup\n"));
 347
 348         rc = ads_search_retry_dn(ads, &res, dn, attrs);
 349
 350         if (!ADS_ERR_OK(rc) || !res) {
 351                 goto failed;
 352         }
 353
 354         (*name) = ads_pull_username(ads, mem_ctx, res);
 355
 356         if (!ads_pull_uint32(ads, res, "sAMAccountType", &atype)) {
 357                 goto failed;
 358         }
 359         (*name_type) = ads_atype_map(atype);
 360
 361         if (!ads_pull_sid(ads, res, "objectSid", sid)) {
 362                 goto failed;
 363         }
 364
 365         if (res)
 366                 ads_msgfree(ads, res);
 367
 368         return True;
 369
 370 failed:
 371         if (res)
 372                 ads_msgfree(ads, res);
 373
 374         return False;
 375 }
 376
 377 /* Lookup user information from a rid */
 378 static NTSTATUS query_user(struct winbindd_domain *domain,
 379                            TALLOC_CTX *mem_ctx,
 380                            const DOM_SID *sid,
 381                            WINBIND_USERINFO *info)
 382 {
 383         ADS_STRUCT *ads = NULL;
 384         const char *attrs[] = {"userPrincipalName",
 385                                "sAMAccountName",
 386                                "name",
 387                                "primaryGroupID",
 388                                ADS_ATTR_SFU_HOMEDIR_OID,
 389                                ADS_ATTR_SFU_SHELL_OID,
 390                                NULL};
 391         ADS_STATUS rc;
 392         int count;
 393         void *msg = NULL;
 394         char *ldap_exp;
 395         char *sidstr;
 396         uint32 group_rid;
 397         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 398
 399         DEBUG(3,("ads: query_user\n"));
 400
 401         ads = ads_cached_connection(domain);
 402
 403         if (!ads) {
 404                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 405                 goto done;
 406         }
 407
 408         sidstr = sid_binstring(sid);
 409         asprintf(&ldap_exp, "(objectSid=%s)", sidstr);
 410         rc = ads_search_retry(ads, &msg, ldap_exp, attrs);
 411         free(ldap_exp);
 412         free(sidstr);
 413         if (!ADS_ERR_OK(rc) || !msg) {
 414                 DEBUG(1,("query_user(sid=%s) ads_search: %s\n",
 415                          sid_string_static(sid), ads_errstr(rc)));
 416                 goto done;
 417         }
 418
 419         count = ads_count_replies(ads, msg);
 420         if (count != 1) {
 421                 DEBUG(1,("query_user(sid=%s): Not found\n",
 422                          sid_string_static(sid)));
 423                 goto done;
 424         }
 425
 426         info->acct_name = ads_pull_username(ads, mem_ctx, msg);
 427         info->full_name = ads_pull_string(ads, mem_ctx, msg, "name");
 428
 429         if (use_nss_info("sfu")) {
 430                 info->homedir = ads_pull_string(ads, mem_ctx, msg, ads->schema.sfu_homedir_attr);
 431                 info->shell = ads_pull_string(ads, mem_ctx, msg, ads->schema.sfu_shell_attr);
 432         }
 433
 434         if (!ads_pull_uint32(ads, msg, "primaryGroupID", &group_rid)) {
 435                 DEBUG(1,("No primary group for %s !?\n",
 436                          sid_string_static(sid)));
 437                 goto done;
 438         }
 439
 440         sid_copy(&info->user_sid, sid);
 441         sid_compose(&info->group_sid, &domain->sid, group_rid);
 442
 443         status = NT_STATUS_OK;
 444
 445         DEBUG(3,("ads query_user gave %s\n", info->acct_name));
 446 done:
 447         if (msg)
 448                 ads_msgfree(ads, msg);
 449
 450         return status;
 451 }
 452
 453 /* Lookup groups a user is a member of - alternate method, for when
 454    tokenGroups are not available. */
 455 static NTSTATUS lookup_usergroups_alt(struct winbindd_domain *domain,
 456                                       TALLOC_CTX *mem_ctx,
 457                                       const char *user_dn,
 458                                       DOM_SID *primary_group,
 459                                       uint32 *num_groups, DOM_SID **user_sids)
 460 {
 461         ADS_STATUS rc;
 462         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 463         int count;
 464         void *res = NULL;
 465         void *msg = NULL;
 466         char *ldap_exp;
 467         ADS_STRUCT *ads;
 468         const char *group_attrs[] = {"objectSid", NULL};
 469         char *escaped_dn;
 470
 471         DEBUG(3,("ads: lookup_usergroups_alt\n"));
 472
 473         ads = ads_cached_connection(domain);
 474
 475         if (!ads) {
 476                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 477                 goto done;
 478         }
 479
 480         if (!(escaped_dn = escape_ldap_string_alloc(user_dn))) {
 481                 status = NT_STATUS_NO_MEMORY;
 482                 goto done;
 483         }
 484
 485         /* buggy server, no tokenGroups.  Instead lookup what groups this user
 486            is a member of by DN search on member*/
 487
 488         if (!(ldap_exp = talloc_asprintf(mem_ctx, "(&(member=%s)(objectClass=group))", escaped_dn))) {
 489                 DEBUG(1,("lookup_usergroups(dn=%s) asprintf failed!\n", user_dn));
 490                 SAFE_FREE(escaped_dn);
 491                 status = NT_STATUS_NO_MEMORY;
 492                 goto done;
 493         }
 494
 495         SAFE_FREE(escaped_dn);
 496
 497         rc = ads_search_retry(ads, &res, ldap_exp, group_attrs);
 498
 499         if (!ADS_ERR_OK(rc) || !res) {
 500                 DEBUG(1,("lookup_usergroups ads_search member=%s: %s\n", user_dn, ads_errstr(rc)));
 501                 return ads_ntstatus(rc);
 502         }
 503
 504         count = ads_count_replies(ads, res);
 505
 506         *user_sids = NULL;
 507         *num_groups = 0;
 508
 509         /* always add the primary group to the sid array */
 510         add_sid_to_array(mem_ctx, primary_group, user_sids, num_groups);
 511
 512         if (count > 0) {
 513                 for (msg = ads_first_entry(ads, res); msg;
 514                      msg = ads_next_entry(ads, msg)) {
 515                         DOM_SID group_sid;
 516
 517                         if (!ads_pull_sid(ads, msg, "objectSid", &group_sid)) {
 518                                 DEBUG(1,("No sid for this group ?!?\n"));
 519                                 continue;
 520                         }
 521
 522                         add_sid_to_array(mem_ctx, &group_sid, user_sids,
 523                                          num_groups);
 524                 }
 525
 526         }
 527
 528         status = (user_sids != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
 529
 530         DEBUG(3,("ads lookup_usergroups (alt) for dn=%s\n", user_dn));
 531 done:
 532         if (res)
 533                 ads_msgfree(ads, res);
 534
 535         return status;
 536 }
 537
 538 /* Lookup groups a user is a member of. */
 539 static NTSTATUS lookup_usergroups(struct winbindd_domain *domain,
 540                                   TALLOC_CTX *mem_ctx,
 541                                   const DOM_SID *sid,
 542                                   uint32 *num_groups, DOM_SID **user_sids)
 543 {
 544         ADS_STRUCT *ads = NULL;
 545         const char *attrs[] = {"tokenGroups", "primaryGroupID", NULL};
 546         ADS_STATUS rc;
 547         int count;
 548         LDAPMessage *msg = NULL;
 549         char *user_dn;
 550         DOM_SID *sids;
 551         int i;
 552         DOM_SID primary_group;
 553         uint32 primary_group_rid;
 554         fstring sid_string;
 555         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 556
 557         DEBUG(3,("ads: lookup_usergroups\n"));
 558         *num_groups = 0;
 559
 560         ads = ads_cached_connection(domain);
 561
 562         if (!ads) {
 563                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 564                 status = NT_STATUS_SERVER_DISABLED;
 565                 goto done;
 566         }
 567
 568         rc = ads_sid_to_dn(ads, mem_ctx, sid, &user_dn);
 569         if (!ADS_ERR_OK(rc)) {
 570                 status = ads_ntstatus(rc);
 571                 goto done;
 572         }
 573
 574         rc = ads_search_retry_dn(ads, (void**)&msg, user_dn, attrs);
 575         if (!ADS_ERR_OK(rc)) {
 576                 status = ads_ntstatus(rc);
 577                 DEBUG(1,("lookup_usergroups(sid=%s) ads_search tokenGroups: %s\n",
 578                          sid_to_string(sid_string, sid), ads_errstr(rc)));
 579                 goto done;
 580         }
 581
 582         if (!msg) {
 583                 DEBUG(1,("lookup_usergroups(sid=%s) ads_search tokenGroups: NULL msg\n",
 584                          sid_to_string(sid_string, sid)));
 585                 status = NT_STATUS_UNSUCCESSFUL;
 586                 goto done;
 587         }
 588
 589         if (!ads_pull_uint32(ads, msg, "primaryGroupID", &primary_group_rid)) {
 590                 DEBUG(1,("%s: No primary group for sid=%s !?\n",
 591                          domain->name, sid_to_string(sid_string, sid)));
 592                 goto done;
 593         }
 594
 595         sid_copy(&primary_group, &domain->sid);
 596         sid_append_rid(&primary_group, primary_group_rid);
 597
 598         count = ads_pull_sids(ads, mem_ctx, msg, "tokenGroups", &sids);
 599
 600         if (msg)
 601                 ads_msgfree(ads, msg);
 602
 603         /* there must always be at least one group in the token,
 604            unless we are talking to a buggy Win2k server */
 605         if (count == 0) {
 606                 return lookup_usergroups_alt(domain, mem_ctx, user_dn,
 607                                              &primary_group,
 608                                              num_groups, user_sids);
 609         }
 610
 611         *user_sids = NULL;
 612         *num_groups = 0;
 613
 614         add_sid_to_array(mem_ctx, &primary_group, user_sids, num_groups);
 615
 616         for (i=0;i<count;i++)
 617                 add_sid_to_array_unique(mem_ctx, &sids[i],
 618                                         user_sids, num_groups);
 619
 620         status = (user_sids != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
 621
 622         DEBUG(3,("ads lookup_usergroups for sid=%s\n",
 623                  sid_to_string(sid_string, sid)));
 624 done:
 625         return status;
 626 }
 627
 628 /*
 629   find the members of a group, given a group rid and domain
 630  */
 631 static NTSTATUS lookup_groupmem(struct winbindd_domain *domain,
 632                                 TALLOC_CTX *mem_ctx,
 633                                 const DOM_SID *group_sid, uint32 *num_names,
 634                                 DOM_SID **sid_mem, char ***names,
 635                                 uint32 **name_types)
 636 {
 637         ADS_STATUS rc;
 638         int count;
 639         void *res=NULL;
 640         ADS_STRUCT *ads = NULL;
 641         char *ldap_exp;
 642         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 643         char *sidstr;
 644         char **members;
 645         int i;
 646         size_t num_members;
 647         fstring sid_string;
 648         BOOL more_values;
 649         const char **attrs;
 650         uint32 first_usn;
 651         uint32 current_usn;
 652         int num_retries = 0;
 653
 654         DEBUG(10,("ads: lookup_groupmem %s sid=%s\n", domain->name,
 655                   sid_string_static(group_sid)));
 656
 657         *num_names = 0;
 658
 659         ads = ads_cached_connection(domain);
 660
 661         if (!ads) {
 662                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 663                 goto done;
 664         }
 665
 666         sidstr = sid_binstring(group_sid);
 667
 668         /* search for all members of the group */
 669         if (!(ldap_exp = talloc_asprintf(mem_ctx, "(objectSid=%s)",sidstr))) {
 670                 SAFE_FREE(sidstr);
 671                 DEBUG(1, ("ads: lookup_groupmem: tallloc_asprintf for ldap_exp failed!\n"));
 672                 status = NT_STATUS_NO_MEMORY;
 673                 goto done;
 674         }
 675         SAFE_FREE(sidstr);
 676
 677         members = NULL;
 678         num_members = 0;
 679
 680         attrs = TALLOC_ARRAY(mem_ctx, const char *, 3);
 681         attrs[1] = talloc_strdup(mem_ctx, "usnChanged");
 682         attrs[2] = NULL;
 683
 684         do {
 685                 if (num_members == 0)
 686                         attrs[0] = talloc_strdup(mem_ctx, "member");
 687
 688                 DEBUG(10, ("Searching for attrs[0] = %s, attrs[1] = %s\n", attrs[0], attrs[1]));
 689
 690                 rc = ads_search_retry(ads, &res, ldap_exp, attrs);
 691
 692                 if (!ADS_ERR_OK(rc) || !res) {
 693                         DEBUG(1,("ads: lookup_groupmem ads_search: %s\n",
 694                                  ads_errstr(rc)));
 695                         status = ads_ntstatus(rc);
 696                         goto done;
 697                 }
 698
 699                 count = ads_count_replies(ads, res);
 700                 if (count == 0)
 701                         break;
 702
 703                 if (num_members == 0) {
 704                         if (!ads_pull_uint32(ads, res, "usnChanged", &first_usn)) {
 705                                 DEBUG(1, ("ads: lookup_groupmem could not pull usnChanged!\n"));
 706                                 goto done;
 707                         }
 708                 }
 709
 710                 if (!ads_pull_uint32(ads, res, "usnChanged", &current_usn)) {
 711                         DEBUG(1, ("ads: lookup_groupmem could not pull usnChanged!\n"));
 712                         goto done;
 713                 }
 714
 715                 if (first_usn != current_usn) {
 716                         DEBUG(5, ("ads: lookup_groupmem USN on this record changed"
 717                                   " - restarting search\n"));
 718                         if (num_retries < 5) {
 719                                 num_retries++;
 720                                 num_members = 0;
 721                                 continue;
 722                         } else {
 723                                 DEBUG(5, ("ads: lookup_groupmem USN on this record changed"
 724                                           " - restarted search too many times, aborting!\n"));
 725                                 status = NT_STATUS_UNSUCCESSFUL;
 726                                 goto done;
 727                         }
 728                 }
 729
 730                 members = ads_pull_strings_range(ads, mem_ctx, res,
 731                                                  "member",
 732                                                  members,
 733                                                  &attrs[0],
 734                                                  &num_members,
 735                                                  &more_values);
 736
 737                 if ((members == NULL) || (num_members == 0))
 738                         break;
 739
 740         } while (more_values);
 741
 742         /* now we need to turn a list of members into rids, names and name types
 743            the problem is that the members are in the form of distinguised names
 744         */
 745
 746         (*sid_mem) = TALLOC_ZERO_ARRAY(mem_ctx, DOM_SID, num_members);
 747         (*name_types) = TALLOC_ZERO_ARRAY(mem_ctx, uint32, num_members);
 748         (*names) = TALLOC_ZERO_ARRAY(mem_ctx, char *, num_members);
 749
 750         for (i=0;i<num_members;i++) {
 751                 uint32 name_type;
 752                 char *name;
 753                 DOM_SID sid;
 754
 755                 if (dn_lookup(ads, mem_ctx, members[i], &name, &name_type, &sid)) {
 756                     (*names)[*num_names] = name;
 757                     (*name_types)[*num_names] = name_type;
 758                     sid_copy(&(*sid_mem)[*num_names], &sid);
 759                     (*num_names)++;
 760                 }
 761         }
 762
 763         status = NT_STATUS_OK;
 764         DEBUG(3,("ads lookup_groupmem for sid=%s\n", sid_to_string(sid_string, group_sid)));
 765 done:
 766
 767         if (res)
 768                 ads_msgfree(ads, res);
 769
 770         return status;
 771 }
 772
 773 /* find the sequence number for a domain */
 774 static NTSTATUS sequence_number(struct winbindd_domain *domain, uint32 *seq)
 775 {
 776         ADS_STRUCT *ads = NULL;
 777         ADS_STATUS rc;
 778
 779         DEBUG(3,("ads: fetch sequence_number for %s\n", domain->name));
 780
 781         *seq = DOM_SEQUENCE_NONE;
 782
 783         ads = ads_cached_connection(domain);
 784
 785         if (!ads) {
 786                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 787                 return NT_STATUS_UNSUCCESSFUL;
 788         }
 789
 790         rc = ads_USN(ads, seq);
 791
 792         if (!ADS_ERR_OK(rc)) {
 793
 794                 /* its a dead connection ; don't destroy it
 795                    through since ads_USN() has already done
 796                    that indirectly */
 797
 798                 domain->private_data = NULL;
 799         }
 800         return ads_ntstatus(rc);
 801 }
 802
 803 /* get a list of trusted domains */
 804 static NTSTATUS trusted_domains(struct winbindd_domain *domain,
 805                                 TALLOC_CTX *mem_ctx,
 806                                 uint32 *num_domains,
 807                                 char ***names,
 808                                 char ***alt_names,
 809                                 DOM_SID **dom_sids)
 810 {
 811         NTSTATUS                result = NT_STATUS_UNSUCCESSFUL;
 812         struct ds_domain_trust  *domains = NULL;
 813         int                     count = 0;
 814         int                     i;
 815                                 /* i think we only need our forest and downlevel trusted domains */
 816         uint32                  flags = DS_DOMAIN_IN_FOREST | DS_DOMAIN_DIRECT_OUTBOUND;
 817         struct rpc_pipe_client *cli;
 818
 819         DEBUG(3,("ads: trusted_domains\n"));
 820
 821         *num_domains = 0;
 822         *alt_names   = NULL;
 823         *names       = NULL;
 824         *dom_sids    = NULL;
 825
 826         {
 827                 unsigned char *session_key;
 828                 DOM_CRED *creds;
 829
 830                 result = cm_connect_netlogon(domain, mem_ctx, &cli,
 831                                              &session_key, &creds);
 832         }
 833
 834         if (!NT_STATUS_IS_OK(result)) {
 835                 DEBUG(5, ("trusted_domains: Could not open a connection to %s "
 836                           "for PIPE_NETLOGON (%s)\n",
 837                           domain->name, nt_errstr(result)));
 838                 return NT_STATUS_UNSUCCESSFUL;
 839         }
 840
 841         if ( NT_STATUS_IS_OK(result) )
 842                 result = rpccli_ds_enum_domain_trusts(cli, mem_ctx,
 843                                                       cli->cli->desthost,
 844                                                       flags, &domains,
 845                                                       (unsigned int *)&count);
 846
 847         if ( NT_STATUS_IS_OK(result) && count) {
 848
 849                 /* Allocate memory for trusted domain names and sids */
 850
 851                 if ( !(*names = TALLOC_ARRAY(mem_ctx, char *, count)) ) {
 852                         DEBUG(0, ("trusted_domains: out of memory\n"));
 853                         return NT_STATUS_NO_MEMORY;
 854                 }
 855
 856                 if ( !(*alt_names = TALLOC_ARRAY(mem_ctx, char *, count)) ) {
 857                         DEBUG(0, ("trusted_domains: out of memory\n"));
 858                         return NT_STATUS_NO_MEMORY;
 859                 }
 860
 861                 if ( !(*dom_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, count)) ) {
 862                         DEBUG(0, ("trusted_domains: out of memory\n"));
 863                         return NT_STATUS_NO_MEMORY;
 864                 }
 865
 866                 /* Copy across names and sids */
 867
 868                 for (i = 0; i < count; i++) {
 869                         (*names)[i] = domains[i].netbios_domain;
 870                         (*alt_names)[i] = domains[i].dns_domain;
 871
 872                         sid_copy(&(*dom_sids)[i], &domains[i].sid);
 873                 }
 874
 875                 *num_domains = count;
 876         }
 877
 878         return result;
 879 }
 880
 881 /* find alternate names list for the domain - for ADS this is the
 882    netbios name */
 883 static NTSTATUS alternate_name(struct winbindd_domain *domain)
 884 {
 885         ADS_STRUCT *ads;
 886         ADS_STATUS rc;
 887         TALLOC_CTX *ctx;
 888         const char *workgroup;
 889
 890         DEBUG(3,("ads: alternate_name\n"));
 891
 892         ads = ads_cached_connection(domain);
 893
 894         if (!ads) {
 895                 domain->last_status = NT_STATUS_SERVER_DISABLED;
 896                 return NT_STATUS_UNSUCCESSFUL;
 897         }
 898
 899         if (!(ctx = talloc_init("alternate_name"))) {
 900                 return NT_STATUS_NO_MEMORY;
 901         }
 902
 903         rc = ads_workgroup_name(ads, ctx, &workgroup);
 904
 905         if (ADS_ERR_OK(rc)) {
 906                 fstrcpy(domain->name, workgroup);
 907                 fstrcpy(domain->alt_name, ads->config.realm);
 908                 strupper_m(domain->alt_name);
 909                 strupper_m(domain->name);
 910         }
 911
 912         talloc_destroy(ctx);
 913
 914         return ads_ntstatus(rc);
 915 }
 916
 917 /* the ADS backend methods are exposed via this structure */
 918 struct winbindd_methods ads_methods = {
 919         True,
 920         query_user_list,
 921         enum_dom_groups,
 922         enum_local_groups,
 923         msrpc_name_to_sid,
 924         msrpc_sid_to_name,
 925         query_user,
 926         lookup_usergroups,
 927         msrpc_lookup_useraliases,
 928         lookup_groupmem,
 929         sequence_number,
 930         trusted_domains,
 931         alternate_name
 932 };
 933
 934 #endif