source3/auth/server_info.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Volker Lendecke 2010
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "auth.h"
  22 #include "lib/util_unixsids.h"
  23 #include "../lib/crypto/arcfour.h"
  24 #include "../librpc/gen_ndr/netlogon.h"
  25 #include "../libcli/security/security.h"
  26 #include "rpc_client/util_netlogon.h"
  27 #include "nsswitch/libwbclient/wbclient.h"
  28 #include "lib/winbind_util.h"
  29 #include "passdb.h"
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_AUTH
  33
  34 /***************************************************************************
  35  Make a server_info struct. Free with TALLOC_FREE().
  36 ***************************************************************************/
  37
  38 struct auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
  39 {
  40         struct auth_serversupplied_info *result;
  41
  42         result = talloc_zero(mem_ctx, struct auth_serversupplied_info);
  43         if (result == NULL) {
  44                 DEBUG(0, ("talloc failed\n"));
  45                 return NULL;
  46         }
  47
  48         /* Initialise the uid and gid values to something non-zero
  49            which may save us from giving away root access if there
  50            is a bug in allocating these fields. */
  51
  52         result->utok.uid = -1;
  53         result->utok.gid = -1;
  54
  55         return result;
  56 }
  57
  58 /****************************************************************************
  59  inits a netr_SamInfo2 structure from an auth_serversupplied_info. sam2 must
  60  already be initialized and is used as the talloc parent for its members.
  61 *****************************************************************************/
  62
  63 NTSTATUS serverinfo_to_SamInfo2(struct auth_serversupplied_info *server_info,
  64                                 struct netr_SamInfo2 *sam2)
  65 {
  66         struct netr_SamInfo3 *info3 = NULL;
  67         NTSTATUS status;
  68
  69         status = copy_netr_SamInfo3(sam2,
  70                                     server_info->info3,
  71                                     &info3);
  72         if (!NT_STATUS_IS_OK(status)) {
  73                 return status;
  74         }
  75
  76         if (server_info->session_key.length) {
  77                 memcpy(info3->base.key.key,
  78                        server_info->session_key.data,
  79                        MIN(sizeof(info3->base.key.key),
  80                            server_info->session_key.length));
  81         }
  82         if (server_info->lm_session_key.length) {
  83                 memcpy(info3->base.LMSessKey.key,
  84                        server_info->lm_session_key.data,
  85                        MIN(sizeof(info3->base.LMSessKey.key),
  86                            server_info->lm_session_key.length));
  87         }
  88
  89         sam2->base = info3->base;
  90
  91         return NT_STATUS_OK;
  92 }
  93
  94 /****************************************************************************
  95  inits a netr_SamInfo3 structure from an auth_serversupplied_info. sam3 must
  96  already be initialized and is used as the talloc parent for its members.
  97 *****************************************************************************/
  98
  99 NTSTATUS serverinfo_to_SamInfo3(const struct auth_serversupplied_info *server_info,
 100                                 struct netr_SamInfo3 *sam3)
 101 {
 102         struct netr_SamInfo3 *info3 = NULL;
 103         NTSTATUS status;
 104
 105         status = copy_netr_SamInfo3(sam3,
 106                                     server_info->info3,
 107                                     &info3);
 108         if (!NT_STATUS_IS_OK(status)) {
 109                 return status;
 110         }
 111
 112         if (server_info->session_key.length) {
 113                 memcpy(info3->base.key.key,
 114                        server_info->session_key.data,
 115                        MIN(sizeof(info3->base.key.key),
 116                            server_info->session_key.length));
 117         }
 118         if (server_info->lm_session_key.length) {
 119                 memcpy(info3->base.LMSessKey.key,
 120                        server_info->lm_session_key.data,
 121                        MIN(sizeof(info3->base.LMSessKey.key),
 122                            server_info->lm_session_key.length));
 123         }
 124
 125         sam3->base = info3->base;
 126
 127         sam3->sidcount          = 0;
 128         sam3->sids              = NULL;
 129
 130         return NT_STATUS_OK;
 131 }
 132
 133 /****************************************************************************
 134  inits a netr_SamInfo6 structure from an auth_serversupplied_info. sam6 must
 135  already be initialized and is used as the talloc parent for its members.
 136 *****************************************************************************/
 137
 138 NTSTATUS serverinfo_to_SamInfo6(struct auth_serversupplied_info *server_info,
 139                                 struct netr_SamInfo6 *sam6)
 140 {
 141         struct pdb_domain_info *dominfo;
 142         struct netr_SamInfo3 *info3 = NULL;
 143         NTSTATUS status;
 144
 145         if ((pdb_capabilities() & PDB_CAP_ADS) == 0) {
 146                 DEBUG(10,("Not adding validation info level 6 "
 147                            "without ADS passdb backend\n"));
 148                 return NT_STATUS_INVALID_INFO_CLASS;
 149         }
 150
 151         dominfo = pdb_get_domain_info(sam6);
 152         if (dominfo == NULL) {
 153                 return NT_STATUS_NO_MEMORY;
 154         }
 155
 156         status = copy_netr_SamInfo3(sam6,
 157                                     server_info->info3,
 158                                     &info3);
 159         if (!NT_STATUS_IS_OK(status)) {
 160                 return status;
 161         }
 162
 163         if (server_info->session_key.length) {
 164                 memcpy(info3->base.key.key,
 165                        server_info->session_key.data,
 166                        MIN(sizeof(info3->base.key.key),
 167                            server_info->session_key.length));
 168         }
 169         if (server_info->lm_session_key.length) {
 170                 memcpy(info3->base.LMSessKey.key,
 171                        server_info->lm_session_key.data,
 172                        MIN(sizeof(info3->base.LMSessKey.key),
 173                            server_info->lm_session_key.length));
 174         }
 175
 176         sam6->base = info3->base;
 177
 178         sam6->sidcount          = 0;
 179         sam6->sids              = NULL;
 180
 181         sam6->dns_domainname.string = talloc_strdup(sam6, dominfo->dns_domain);
 182         if (sam6->dns_domainname.string == NULL) {
 183                 return NT_STATUS_NO_MEMORY;
 184         }
 185
 186         sam6->principal_name.string = talloc_asprintf(
 187                 sam6, "%s@%s", sam6->base.account_name.string,
 188                 sam6->dns_domainname.string);
 189         if (sam6->principal_name.string == NULL) {
 190                 return NT_STATUS_NO_MEMORY;
 191         }
 192
 193         return NT_STATUS_OK;
 194 }
 195
 196 static NTSTATUS append_netr_SidAttr(TALLOC_CTX *mem_ctx,
 197                                     struct netr_SidAttr **sids,
 198                                     uint32_t *count,
 199                                     const struct dom_sid2 *asid,
 200                                     uint32_t attributes)
 201 {
 202         uint32_t t = *count;
 203
 204         *sids = talloc_realloc(mem_ctx, *sids, struct netr_SidAttr, t + 1);
 205         if (*sids == NULL) {
 206                 return NT_STATUS_NO_MEMORY;
 207         }
 208         (*sids)[t].sid = dom_sid_dup(*sids, asid);
 209         if ((*sids)[t].sid == NULL) {
 210                 return NT_STATUS_NO_MEMORY;
 211         }
 212         (*sids)[t].attributes = attributes;
 213         *count = t + 1;
 214
 215         return NT_STATUS_OK;
 216 }
 217
 218 /* Fills the samr_RidWithAttributeArray with the provided sids.
 219  * If it happens that we have additional groups that do not belong
 220  * to the domain, add their sids as extra sids */
 221 static NTSTATUS group_sids_to_info3(struct netr_SamInfo3 *info3,
 222                                     const struct dom_sid *sids,
 223                                     size_t num_sids)
 224 {
 225         uint32_t attributes = SE_GROUP_MANDATORY |
 226                                 SE_GROUP_ENABLED_BY_DEFAULT |
 227                                 SE_GROUP_ENABLED;
 228         struct samr_RidWithAttributeArray *groups;
 229         struct dom_sid *domain_sid;
 230         unsigned int i;
 231         NTSTATUS status;
 232         uint32_t rid;
 233         bool ok;
 234
 235         domain_sid = info3->base.domain_sid;
 236         groups = &info3->base.groups;
 237
 238         groups->rids = talloc_array(info3,
 239                                     struct samr_RidWithAttribute, num_sids);
 240         if (!groups->rids) {
 241                 return NT_STATUS_NO_MEMORY;
 242         }
 243
 244         for (i = 0; i < num_sids; i++) {
 245                 ok = sid_peek_check_rid(domain_sid, &sids[i], &rid);
 246                 if (ok) {
 247                         /* store domain group rid */
 248                         groups->rids[groups->count].rid = rid;
 249                         groups->rids[groups->count].attributes = attributes;
 250                         groups->count++;
 251                         continue;
 252                 }
 253
 254                 /* if this wasn't a domain sid, add it as extra sid */
 255                 status = append_netr_SidAttr(info3, &info3->sids,
 256                                              &info3->sidcount,
 257                                              &sids[i], attributes);
 258                 if (!NT_STATUS_IS_OK(status)) {
 259                         return status;
 260                 }
 261         }
 262
 263         return NT_STATUS_OK;
 264 }
 265
 266 /*
 267  * Merge resource SIDs, if any, into the passed in info3 structure.
 268  */
 269
 270 static NTSTATUS merge_resource_sids(const struct PAC_LOGON_INFO *logon_info,
 271                                 struct netr_SamInfo3 *info3)
 272 {
 273         uint32_t i = 0;
 274         const struct PAC_DOMAIN_GROUP_MEMBERSHIP *rg = NULL;
 275
 276         if (logon_info->info3.base.user_flags & NETLOGON_RESOURCE_GROUPS) {
 277                 rg = &logon_info->resource_groups;
 278         }
 279
 280         if (rg == NULL) {
 281                 return NT_STATUS_OK;
 282         }
 283
 284         if (rg->domain_sid == NULL) {
 285                 DEBUG(10, ("Missing Resource Group Domain SID\n"));
 286                 return NT_STATUS_INVALID_PARAMETER;
 287         }
 288
 289         /* The IDL layer would be a better place to check this, but to
 290          * guard the integer addition below, we double-check */
 291         if (rg->groups.count > 65535) {
 292                 DEBUG(10, ("Too much Resource Group RIDs %u\n",
 293                           (unsigned)rg->groups.count));
 294                 return NT_STATUS_INVALID_PARAMETER;
 295         }
 296
 297         /*
 298          * If there are any resource groups (SID Compression) add
 299          * them to the extra sids portion of the info3 in the PAC.
 300          *
 301          * This makes the info3 look like it would if we got the info
 302          * from the DC rather than the PAC.
 303          */
 304
 305         /*
 306          * Construct a SID for each RID in the list and then append it
 307          * to the info3.
 308          */
 309         for (i = 0; i < rg->groups.count; i++) {
 310                 NTSTATUS status;
 311                 struct dom_sid new_sid;
 312                 uint32_t attributes = rg->groups.rids[i].attributes;
 313
 314                 sid_compose(&new_sid,
 315                             rg->domain_sid,
 316                             rg->groups.rids[i].rid);
 317
 318                 DEBUG(10, ("Adding SID %s to extra SIDS\n",
 319                         sid_string_dbg(&new_sid)));
 320
 321                 status = append_netr_SidAttr(info3, &info3->sids,
 322                                         &info3->sidcount,
 323                                         &new_sid,
 324                                         attributes);
 325                 if (!NT_STATUS_IS_OK(status)) {
 326                         DEBUG(1, ("failed to append SID %s to extra SIDS: %s\n",
 327                                 sid_string_dbg(&new_sid),
 328                                 nt_errstr(status)));
 329                         return status;
 330                 }
 331         }
 332
 333         return NT_STATUS_OK;
 334 }
 335
 336 /*
 337  * Create a copy of an info3 struct from the struct PAC_LOGON_INFO,
 338  * then merge resource SIDs, if any, into it. If successful return
 339  * the created info3 struct.
 340  */
 341
 342 NTSTATUS create_info3_from_pac_logon_info(TALLOC_CTX *mem_ctx,
 343                                         const struct PAC_LOGON_INFO *logon_info,
 344                                         struct netr_SamInfo3 **pp_info3)
 345 {
 346         NTSTATUS status;
 347         struct netr_SamInfo3 *info3 = NULL;
 348
 349         status = copy_netr_SamInfo3(mem_ctx,
 350                                     &logon_info->info3,
 351                                     &info3);
 352         if (!NT_STATUS_IS_OK(status)) {
 353                 return status;
 354         }
 355
 356         status = merge_resource_sids(logon_info, info3);
 357         if (!NT_STATUS_IS_OK(status)) {
 358                 TALLOC_FREE(info3);
 359                 return status;
 360         }
 361         *pp_info3 = info3;
 362         return NT_STATUS_OK;
 363 }
 364
 365 /*
 366  * Create a copy of an info6 struct from the PAC_UPN_DNS_INFO and PAC_LOGON_INFO
 367  * then merge resource SIDs, if any, into it. If successful return the created
 368  * info6 struct.
 369  */
 370 NTSTATUS create_info6_from_pac(TALLOC_CTX *mem_ctx,
 371                                const struct PAC_LOGON_INFO *logon_info,
 372                                const struct PAC_UPN_DNS_INFO *upn_dns_info,
 373                                struct netr_SamInfo6 **pp_info6)
 374 {
 375         NTSTATUS status;
 376         struct netr_SamInfo6 *info6 = NULL;
 377         struct netr_SamInfo3 *info3 = NULL;
 378
 379         info6 = talloc_zero(mem_ctx, struct netr_SamInfo6);
 380         if (info6 == NULL) {
 381                 return NT_STATUS_NO_MEMORY;
 382         }
 383
 384         status = copy_netr_SamInfo3(info6,
 385                                     &logon_info->info3,
 386                                     &info3);
 387         if (!NT_STATUS_IS_OK(status)) {
 388                 TALLOC_FREE(info6);
 389                 return status;
 390         }
 391
 392         status = merge_resource_sids(logon_info, info3);
 393         if (!NT_STATUS_IS_OK(status)) {
 394                 TALLOC_FREE(info6);
 395                 return status;
 396         }
 397
 398         info6->base = info3->base;
 399         info6->sids = info3->sids;
 400         info6->sidcount = info3->sidcount;
 401
 402         if (upn_dns_info != NULL) {
 403                 info6->dns_domainname.string = talloc_strdup(info6,
 404                                 upn_dns_info->dns_domain_name);
 405                 if (info6->dns_domainname.string == NULL) {
 406                         TALLOC_FREE(info6);
 407                         return NT_STATUS_NO_MEMORY;
 408                 }
 409                 info6->principal_name.string = talloc_strdup(info6,
 410                                 upn_dns_info->upn_name);
 411                 if (info6->principal_name.string == NULL) {
 412                         TALLOC_FREE(info6);
 413                         return NT_STATUS_NO_MEMORY;
 414                 }
 415         }
 416
 417         *pp_info6 = info6;
 418         return NT_STATUS_OK;
 419 }
 420
 421 /*
 422  * Check if this is a "Unix Users" domain user, or a
 423  * "Unix Groups" domain group, we need to handle it
 424  * in a special way if that's the case.
 425  */
 426
 427 static NTSTATUS SamInfo3_handle_sids(const char *username,
 428                         const struct dom_sid *user_sid,
 429                         const struct dom_sid *group_sid,
 430                         struct netr_SamInfo3 *info3,
 431                         struct dom_sid *domain_sid,
 432                         struct extra_auth_info *extra)
 433 {
 434         if (sid_check_is_in_unix_users(user_sid)) {
 435                 /* in info3 you can only set rids for the user and the
 436                  * primary group, and the domain sid must be that of
 437                  * the sam domain.
 438                  *
 439                  * Store a completely bogus value here.
 440                  * The real SID is stored in the extra sids.
 441                  * Other code will know to look there if (-1) is found
 442                  */
 443                 info3->base.rid = (uint32_t)(-1);
 444                 sid_copy(&extra->user_sid, user_sid);
 445
 446                 DEBUG(10, ("Unix User found. Rid marked as "
 447                         "special and sid (%s) saved as extra sid\n",
 448                         sid_string_dbg(user_sid)));
 449         } else {
 450                 sid_copy(domain_sid, user_sid);
 451                 sid_split_rid(domain_sid, &info3->base.rid);
 452         }
 453
 454         if (is_null_sid(domain_sid)) {
 455                 sid_copy(domain_sid, get_global_sam_sid());
 456         }
 457
 458         /* check if this is a "Unix Groups" domain group,
 459          * if so we need special handling */
 460         if (sid_check_is_in_unix_groups(group_sid)) {
 461                 /* in info3 you can only set rids for the user and the
 462                  * primary group, and the domain sid must be that of
 463                  * the sam domain.
 464                  *
 465                  * Store a completely bogus value here.
 466                  * The real SID is stored in the extra sids.
 467                  * Other code will know to look there if (-1) is found
 468                  */
 469                 info3->base.primary_gid = (uint32_t)(-1);
 470                 sid_copy(&extra->pgid_sid, group_sid);
 471
 472                 DEBUG(10, ("Unix Group found. Rid marked as "
 473                         "special and sid (%s) saved as extra sid\n",
 474                         sid_string_dbg(group_sid)));
 475         } else {
 476                 bool ok = sid_peek_check_rid(domain_sid, group_sid,
 477                                         &info3->base.primary_gid);
 478                 if (!ok) {
 479                         DEBUG(1, ("The primary group domain sid(%s) does not "
 480                                 "match the domain sid(%s) for %s(%s)\n",
 481                                 sid_string_dbg(group_sid),
 482                                 sid_string_dbg(domain_sid),
 483                                 username,
 484                                 sid_string_dbg(user_sid)));
 485                         return NT_STATUS_INVALID_SID;
 486                 }
 487         }
 488         return NT_STATUS_OK;
 489 }
 490
 491 #define RET_NOMEM(ptr) do { \
 492         if (!ptr) { \
 493                 TALLOC_FREE(info3); \
 494                 return NT_STATUS_NO_MEMORY; \
 495         } } while(0)
 496
 497 NTSTATUS samu_to_SamInfo3(TALLOC_CTX *mem_ctx,
 498                           struct samu *samu,
 499                           const char *login_server,
 500                           struct netr_SamInfo3 **_info3,
 501                           struct extra_auth_info *extra)
 502 {
 503         struct netr_SamInfo3 *info3;
 504         const struct dom_sid *user_sid;
 505         const struct dom_sid *group_sid;
 506         struct dom_sid domain_sid;
 507         struct dom_sid *group_sids;
 508         uint32_t num_group_sids = 0;
 509         const char *tmp;
 510         gid_t *gids;
 511         NTSTATUS status;
 512
 513         user_sid = pdb_get_user_sid(samu);
 514         group_sid = pdb_get_group_sid(samu);
 515
 516         if (!user_sid || !group_sid) {
 517                 DEBUG(1, ("Sam account is missing sids!\n"));
 518                 return NT_STATUS_UNSUCCESSFUL;
 519         }
 520
 521         info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 522         if (!info3) {
 523                 return NT_STATUS_NO_MEMORY;
 524         }
 525
 526         ZERO_STRUCT(domain_sid);
 527
 528         status = SamInfo3_handle_sids(pdb_get_username(samu),
 529                                 user_sid,
 530                                 group_sid,
 531                                 info3,
 532                                 &domain_sid,
 533                                 extra);
 534
 535         if (!NT_STATUS_IS_OK(status)) {
 536                 TALLOC_FREE(info3);
 537                 return status;
 538         }
 539
 540         unix_to_nt_time(&info3->base.logon_time, pdb_get_logon_time(samu));
 541         unix_to_nt_time(&info3->base.logoff_time, get_time_t_max());
 542         unix_to_nt_time(&info3->base.kickoff_time, get_time_t_max());
 543         unix_to_nt_time(&info3->base.last_password_change,
 544                         pdb_get_pass_last_set_time(samu));
 545         unix_to_nt_time(&info3->base.allow_password_change,
 546                         pdb_get_pass_can_change_time(samu));
 547         unix_to_nt_time(&info3->base.force_password_change,
 548                         pdb_get_pass_must_change_time(samu));
 549
 550         tmp = pdb_get_username(samu);
 551         if (tmp) {
 552                 info3->base.account_name.string = talloc_strdup(info3, tmp);
 553                 RET_NOMEM(info3->base.account_name.string);
 554         }
 555         tmp = pdb_get_fullname(samu);
 556         if (tmp) {
 557                 info3->base.full_name.string = talloc_strdup(info3, tmp);
 558                 RET_NOMEM(info3->base.full_name.string);
 559         }
 560         tmp = pdb_get_logon_script(samu);
 561         if (tmp) {
 562                 info3->base.logon_script.string = talloc_strdup(info3, tmp);
 563                 RET_NOMEM(info3->base.logon_script.string);
 564         }
 565         tmp = pdb_get_profile_path(samu);
 566         if (tmp) {
 567                 info3->base.profile_path.string = talloc_strdup(info3, tmp);
 568                 RET_NOMEM(info3->base.profile_path.string);
 569         }
 570         tmp = pdb_get_homedir(samu);
 571         if (tmp) {
 572                 info3->base.home_directory.string = talloc_strdup(info3, tmp);
 573                 RET_NOMEM(info3->base.home_directory.string);
 574         }
 575         tmp = pdb_get_dir_drive(samu);
 576         if (tmp) {
 577                 info3->base.home_drive.string = talloc_strdup(info3, tmp);
 578                 RET_NOMEM(info3->base.home_drive.string);
 579         }
 580
 581         info3->base.logon_count = pdb_get_logon_count(samu);
 582         info3->base.bad_password_count = pdb_get_bad_password_count(samu);
 583
 584         info3->base.logon_domain.string = talloc_strdup(info3,
 585                                                   pdb_get_domain(samu));
 586         RET_NOMEM(info3->base.logon_domain.string);
 587
 588         info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
 589         RET_NOMEM(info3->base.domain_sid);
 590
 591         status = pdb_enum_group_memberships(mem_ctx, samu,
 592                                             &group_sids, &gids,
 593                                             &num_group_sids);
 594         if (!NT_STATUS_IS_OK(status)) {
 595                 DEBUG(1, ("Failed to get groups from sam account.\n"));
 596                 TALLOC_FREE(info3);
 597                 return status;
 598         }
 599
 600         if (num_group_sids) {
 601                 status = group_sids_to_info3(info3, group_sids, num_group_sids);
 602                 if (!NT_STATUS_IS_OK(status)) {
 603                         TALLOC_FREE(info3);
 604                         return status;
 605                 }
 606         }
 607
 608         /* We don't need sids and gids after the conversion */
 609         TALLOC_FREE(group_sids);
 610         TALLOC_FREE(gids);
 611         num_group_sids = 0;
 612
 613         /* FIXME: should we add other flags ? */
 614         info3->base.user_flags = NETLOGON_EXTRA_SIDS;
 615
 616         if (login_server) {
 617                 info3->base.logon_server.string = talloc_strdup(info3, login_server);
 618                 RET_NOMEM(info3->base.logon_server.string);
 619         }
 620
 621         info3->base.acct_flags = pdb_get_acct_ctrl(samu);
 622
 623         *_info3 = info3;
 624         return NT_STATUS_OK;
 625 }
 626
 627 NTSTATUS passwd_to_SamInfo3(TALLOC_CTX *mem_ctx,
 628                             const char *unix_username,
 629                             const struct passwd *pwd,
 630                             struct netr_SamInfo3 **pinfo3,
 631                             struct extra_auth_info *extra)
 632 {
 633         struct netr_SamInfo3 *info3;
 634         NTSTATUS status;
 635         TALLOC_CTX *tmp_ctx;
 636         const char *domain_name = NULL;
 637         const char *user_name = NULL;
 638         struct dom_sid domain_sid;
 639         struct dom_sid user_sid;
 640         struct dom_sid group_sid;
 641         enum lsa_SidType type;
 642         uint32_t num_sids = 0;
 643         struct dom_sid *user_sids = NULL;
 644         bool is_null;
 645         bool ok;
 646
 647         tmp_ctx = talloc_stackframe();
 648
 649         ok = lookup_name_smbconf(tmp_ctx,
 650                                  unix_username,
 651                                  LOOKUP_NAME_ALL,
 652                                  &domain_name,
 653                                  &user_name,
 654                                  &user_sid,
 655                                  &type);
 656         if (!ok) {
 657                 status = NT_STATUS_NO_SUCH_USER;
 658                 goto done;
 659         }
 660
 661         if (type != SID_NAME_USER) {
 662                 status = NT_STATUS_NO_SUCH_USER;
 663                 goto done;
 664         }
 665
 666         ok = winbind_lookup_usersids(tmp_ctx,
 667                                      &user_sid,
 668                                      &num_sids,
 669                                      &user_sids);
 670         /* Check if winbind is running */
 671         if (ok) {
 672                 /*
 673                  * Winbind is running and the first element of the user_sids
 674                  * is the primary group.
 675                  */
 676                 if (num_sids > 0) {
 677                         group_sid = user_sids[0];
 678                 }
 679         } else {
 680                 /*
 681                  * Winbind is not running, try to create the group_sid from the
 682                  * passwd group id.
 683                  */
 684
 685                 /*
 686                  * This can lead to a primary group of S-1-22-2-XX which
 687                  * will be rejected by other Samba code.
 688                  */
 689                 gid_to_sid(&group_sid, pwd->pw_gid);
 690         }
 691
 692         /*
 693          * If we are a unix group, or a wellknown/builtin alias,
 694          * set the group_sid to the
 695          * 'Domain Users' RID of 513 which will always resolve to a
 696          * name.
 697          */
 698         if (sid_check_is_in_unix_groups(&group_sid) ||
 699             sid_check_is_in_builtin(&group_sid) ||
 700             sid_check_is_in_wellknown_domain(&group_sid)) {
 701                 if (sid_check_is_in_unix_users(&user_sid)) {
 702                         sid_compose(&group_sid,
 703                                     get_global_sam_sid(),
 704                                     DOMAIN_RID_USERS);
 705                 } else {
 706                         sid_copy(&domain_sid, &user_sid);
 707                         sid_split_rid(&domain_sid, NULL);
 708                         sid_compose(&group_sid,
 709                                     &domain_sid,
 710                                     DOMAIN_RID_USERS);
 711                 }
 712         }
 713
 714         /* Make sure we have a valid group sid */
 715         is_null = is_null_sid(&group_sid);
 716         if (is_null) {
 717                 status = NT_STATUS_NO_SUCH_USER;
 718                 goto done;
 719         }
 720
 721         /* Construct a netr_SamInfo3 from the information we have */
 722         info3 = talloc_zero(tmp_ctx, struct netr_SamInfo3);
 723         if (!info3) {
 724                 status = NT_STATUS_NO_MEMORY;
 725                 goto done;
 726         }
 727
 728         info3->base.account_name.string = talloc_strdup(info3, unix_username);
 729         if (info3->base.account_name.string == NULL) {
 730                 status = NT_STATUS_NO_MEMORY;
 731                 goto done;
 732         }
 733
 734         ZERO_STRUCT(domain_sid);
 735
 736         status = SamInfo3_handle_sids(unix_username,
 737                                 &user_sid,
 738                                 &group_sid,
 739                                 info3,
 740                                 &domain_sid,
 741                                 extra);
 742
 743         if (!NT_STATUS_IS_OK(status)) {
 744                 goto done;
 745         }
 746
 747         info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
 748         if (info3->base.domain_sid == NULL) {
 749                 status = NT_STATUS_NO_MEMORY;
 750                 goto done;
 751         }
 752
 753         ok = sid_peek_check_rid(&domain_sid, &group_sid,
 754                                 &info3->base.primary_gid);
 755         if (!ok) {
 756                 DEBUG(1, ("The primary group domain sid(%s) does not "
 757                           "match the domain sid(%s) for %s(%s)\n",
 758                           sid_string_dbg(&group_sid),
 759                           sid_string_dbg(&domain_sid),
 760                           unix_username,
 761                           sid_string_dbg(&user_sid)));
 762                 status = NT_STATUS_INVALID_SID;
 763                 goto done;
 764         }
 765
 766         info3->base.acct_flags = ACB_NORMAL;
 767
 768         if (num_sids) {
 769                 status = group_sids_to_info3(info3, user_sids, num_sids);
 770                 if (!NT_STATUS_IS_OK(status)) {
 771                         goto done;
 772                 }
 773         }
 774
 775         *pinfo3 = talloc_steal(mem_ctx, info3);
 776
 777         status = NT_STATUS_OK;
 778 done:
 779         talloc_free(tmp_ctx);
 780
 781         return status;
 782 }