source4/auth/sam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2010
   5    Copyright (C) Gerald Carter                             2003
   6    Copyright (C) Stefan Metzmacher                         2005
   7    Copyright (C) Matthias Dieter Wallnöfer                 2009
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "system/time.h"
  25 #include "auth/auth.h"
  26 #include <ldb.h>
  27 #include "dsdb/samdb/samdb.h"
  28 #include "libcli/security/security.h"
  29 #include "auth/auth_sam.h"
  30 #include "dsdb/common/util.h"
  31 #include "libcli/ldap/ldap_ndr.h"
  32 #include "param/param.h"
  33
  34 #define KRBTGT_ATTRS \
  35         /* required for the krb5 kdc */         \
  36         "objectClass",                          \
  37         "sAMAccountName",                       \
  38         "userPrincipalName",                    \
  39         "servicePrincipalName",                 \
  40         "msDS-KeyVersionNumber",                \
  41         "msDS-SecondaryKrbTgtNumber",           \
  42         "msDS-SupportedEncryptionTypes",        \
  43         "supplementalCredentials",              \
  44         "msDS-AllowedToDelegateTo",             \
  45                                                 \
  46         /* passwords */                         \
  47         "dBCSPwd",                              \
  48         "unicodePwd",                           \
  49                                                 \
  50         "userAccountControl",                   \
  51         "objectSid",                            \
  52                                                 \
  53         "pwdLastSet",                           \
  54         "accountExpires"
  55
  56 const char *krbtgt_attrs[] = {
  57         KRBTGT_ATTRS, NULL
  58 };
  59
  60 const char *server_attrs[] = {
  61         KRBTGT_ATTRS, NULL
  62 };
  63
  64 const char *user_attrs[] = {
  65         KRBTGT_ATTRS,
  66
  67         "logonHours",
  68
  69         /* check 'allowed workstations' */
  70         "userWorkstations",
  71
  72         /* required for user_info_dc, not access control: */
  73         "displayName",
  74         "scriptPath",
  75         "profilePath",
  76         "homeDirectory",
  77         "homeDrive",
  78         "lastLogon",
  79         "lastLogoff",
  80         "accountExpires",
  81         "badPwdCount",
  82         "logonCount",
  83         "primaryGroupID",
  84         "memberOf",
  85         NULL,
  86 };
  87
  88 /****************************************************************************
  89  Check if a user is allowed to logon at this time. Note this is the
  90  servers local time, as logon hours are just specified as a weekly
  91  bitmask.
  92 ****************************************************************************/
  93
  94 static bool logon_hours_ok(struct ldb_message *msg, const char *name_for_logs)
  95 {
  96         /* In logon hours first bit is Sunday from 12AM to 1AM */
  97         const struct ldb_val *hours;
  98         struct tm *utctime;
  99         time_t lasttime;
 100         const char *asct;
 101         uint8_t bitmask, bitpos;
 102
 103         hours = ldb_msg_find_ldb_val(msg, "logonHours");
 104         if (!hours) {
 105                 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs));
 106                 return true;
 107         }
 108
 109         if (hours->length != 168/8) {
 110                 DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs));
 111                 return true;
 112         }
 113
 114         lasttime = time(NULL);
 115         utctime = gmtime(&lasttime);
 116         if (!utctime) {
 117                 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
 118                         name_for_logs));
 119                 return false;
 120         }
 121
 122         /* find the corresponding byte and bit */
 123         bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
 124         bitmask = 1 << (bitpos % 8);
 125
 126         if (! (hours->data[bitpos/8] & bitmask)) {
 127                 struct tm *t = localtime(&lasttime);
 128                 if (!t) {
 129                         asct = "INVALID TIME";
 130                 } else {
 131                         asct = asctime(t);
 132                         if (!asct) {
 133                                 asct = "INVALID TIME";
 134                         }
 135                 }
 136
 137                 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
 138                           "logon at this time (%s).\n",
 139                           name_for_logs, asct ));
 140                 return false;
 141         }
 142
 143         asct = asctime(utctime);
 144         DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
 145                 name_for_logs, asct ? asct : "UNKNOWN TIME" ));
 146
 147         return true;
 148 }
 149
 150 /****************************************************************************
 151  Do a specific test for a SAM_ACCOUNT being valid for this connection
 152  (ie not disabled, expired and the like).
 153 ****************************************************************************/
 154 _PUBLIC_ NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
 155                                      struct ldb_context *sam_ctx,
 156                                      uint32_t logon_parameters,
 157                                      struct ldb_dn *domain_dn,
 158                                      struct ldb_message *msg,
 159                                      const char *logon_workstation,
 160                                      const char *name_for_logs,
 161                                      bool allow_domain_trust,
 162                                      bool password_change)
 163 {
 164         uint16_t acct_flags;
 165         const char *workstation_list;
 166         NTTIME acct_expiry;
 167         NTTIME must_change_time;
 168
 169         NTTIME now;
 170         DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs));
 171
 172         acct_flags = samdb_result_acct_flags(sam_ctx, mem_ctx, msg, domain_dn);
 173
 174         acct_expiry = samdb_result_account_expires(msg);
 175
 176         /* Check for when we must change this password, taking the
 177          * userAccountControl flags into account */
 178         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
 179                                                               domain_dn, msg);
 180
 181         workstation_list = ldb_msg_find_attr_as_string(msg, "userWorkstations", NULL);
 182
 183         /* Quit if the account was disabled. */
 184         if (acct_flags & ACB_DISABLED) {
 185                 DEBUG(2,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs));
 186                 return NT_STATUS_ACCOUNT_DISABLED;
 187         }
 188
 189         /* Quit if the account was locked out. */
 190         if (acct_flags & ACB_AUTOLOCK) {
 191                 DEBUG(2,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs));
 192                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 193         }
 194
 195         /* Test account expire time */
 196         unix_to_nt_time(&now, time(NULL));
 197         if (now > acct_expiry) {
 198                 DEBUG(2,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs));
 199                 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
 200                          nt_time_string(mem_ctx, acct_expiry)));
 201                 return NT_STATUS_ACCOUNT_EXPIRED;
 202         }
 203
 204         /* check for immediate expiry "must change at next logon" (but not if this is a password change request) */
 205         if ((must_change_time == 0) && !password_change) {
 206                 DEBUG(2,("sam_account_ok: Account for user '%s' password must change!.\n",
 207                          name_for_logs));
 208                 return NT_STATUS_PASSWORD_MUST_CHANGE;
 209         }
 210
 211         /* check for expired password (but not if this is a password change request) */
 212         if ((must_change_time < now) && !password_change) {
 213                 DEBUG(2,("sam_account_ok: Account for user '%s' password expired!.\n",
 214                          name_for_logs));
 215                 DEBUG(2,("sam_account_ok: Password expired at '%s' unix time.\n",
 216                          nt_time_string(mem_ctx, must_change_time)));
 217                 return NT_STATUS_PASSWORD_EXPIRED;
 218         }
 219
 220         /* Test workstation. Workstation list is comma separated. */
 221         if (logon_workstation && workstation_list && *workstation_list) {
 222                 bool invalid_ws = true;
 223                 int i;
 224                 const char **workstations = (const char **)str_list_make(mem_ctx, workstation_list, ",");
 225
 226                 for (i = 0; workstations && workstations[i]; i++) {
 227                         DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
 228                                   workstations[i], logon_workstation));
 229
 230                         if (strequal(workstations[i], logon_workstation)) {
 231                                 invalid_ws = false;
 232                                 break;
 233                         }
 234                 }
 235
 236                 talloc_free(workstations);
 237
 238                 if (invalid_ws) {
 239                         return NT_STATUS_INVALID_WORKSTATION;
 240                 }
 241         }
 242
 243         if (!logon_hours_ok(msg, name_for_logs)) {
 244                 return NT_STATUS_INVALID_LOGON_HOURS;
 245         }
 246
 247         if (!allow_domain_trust) {
 248                 if (acct_flags & ACB_DOMTRUST) {
 249                         DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs));
 250                         return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 251                 }
 252         }
 253         if (!(logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
 254                 if (acct_flags & ACB_SVRTRUST) {
 255                         DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs));
 256                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 257                 }
 258         }
 259         if (!(logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
 260                 /* TODO: this fails with current solaris client. We
 261                    need to work with Gordon to work out why */
 262                 if (acct_flags & ACB_WSTRUST) {
 263                         DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs));
 264                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 265                 }
 266         }
 267
 268         return NT_STATUS_OK;
 269 }
 270
 271 _PUBLIC_ NTSTATUS authsam_make_user_info_dc(TALLOC_CTX *mem_ctx,
 272                                            struct ldb_context *sam_ctx,
 273                                            const char *netbios_name,
 274                                            const char *domain_name,
 275                                            struct ldb_dn *domain_dn,
 276                                            struct ldb_message *msg,
 277                                            DATA_BLOB user_sess_key,
 278                                            DATA_BLOB lm_sess_key,
 279                                            struct auth_user_info_dc **_user_info_dc)
 280 {
 281         NTSTATUS status;
 282         struct auth_user_info_dc *user_info_dc;
 283         struct auth_user_info *info;
 284         const char *str, *filter;
 285         /* SIDs for the account and his primary group */
 286         struct dom_sid *account_sid;
 287         const char *primary_group_string;
 288         const char *primary_group_dn;
 289         DATA_BLOB primary_group_blob;
 290         /* SID structures for the expanded group memberships */
 291         struct dom_sid *sids = NULL;
 292         unsigned int num_sids = 0, i;
 293         struct dom_sid *domain_sid;
 294         TALLOC_CTX *tmp_ctx;
 295         struct ldb_message_element *el;
 296
 297         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 298         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 299
 300         tmp_ctx = talloc_new(user_info_dc);
 301         if (user_info_dc == NULL) {
 302                 TALLOC_FREE(user_info_dc);
 303                 return NT_STATUS_NO_MEMORY;
 304         }
 305
 306         sids = talloc_array(user_info_dc, struct dom_sid, 2);
 307         if (sids == NULL) {
 308                 TALLOC_FREE(user_info_dc);
 309                 return NT_STATUS_NO_MEMORY;
 310         }
 311
 312         num_sids = 2;
 313
 314         account_sid = samdb_result_dom_sid(user_info_dc, msg, "objectSid");
 315         if (account_sid == NULL) {
 316                 TALLOC_FREE(user_info_dc);
 317                 return NT_STATUS_NO_MEMORY;
 318         }
 319
 320         status = dom_sid_split_rid(tmp_ctx, account_sid, &domain_sid, NULL);
 321         if (!NT_STATUS_IS_OK(status)) {
 322                 talloc_free(user_info_dc);
 323                 return status;
 324         }
 325
 326         sids[PRIMARY_USER_SID_INDEX] = *account_sid;
 327         sids[PRIMARY_GROUP_SID_INDEX] = *domain_sid;
 328         sid_append_rid(&sids[PRIMARY_GROUP_SID_INDEX], ldb_msg_find_attr_as_uint(msg, "primaryGroupID", ~0));
 329
 330         /* Filter out builtin groups from this token.  We will search
 331          * for builtin groups later, and not include them in the PAC
 332          * on SamLogon validation info */
 333         filter = talloc_asprintf(tmp_ctx, "(&(objectClass=group)(!(groupType:1.2.840.113556.1.4.803:=%u))(groupType:1.2.840.113556.1.4.803:=%u))", GROUP_TYPE_BUILTIN_LOCAL_GROUP, GROUP_TYPE_SECURITY_ENABLED);
 334         if (filter == NULL) {
 335                 TALLOC_FREE(user_info_dc);
 336                 return NT_STATUS_NO_MEMORY;
 337         }
 338
 339         primary_group_string = dom_sid_string(tmp_ctx, &sids[PRIMARY_GROUP_SID_INDEX]);
 340         if (primary_group_string == NULL) {
 341                 TALLOC_FREE(user_info_dc);
 342                 return NT_STATUS_NO_MEMORY;
 343         }
 344
 345         primary_group_dn = talloc_asprintf(tmp_ctx, "<SID=%s>", primary_group_string);
 346         if (primary_group_dn == NULL) {
 347                 TALLOC_FREE(user_info_dc);
 348                 return NT_STATUS_NO_MEMORY;
 349         }
 350
 351         primary_group_blob = data_blob_string_const(primary_group_dn);
 352
 353         /* Expands the primary group - this function takes in
 354          * memberOf-like values, so we fake one up with the
 355          * <SID=S-...> format of DN and then let it expand
 356          * them, as long as they meet the filter - so only
 357          * domain groups, not builtin groups
 358          *
 359          * The primary group is still treated specially, so we set the
 360          * 'only childs' flag to true
 361          */
 362         status = dsdb_expand_nested_groups(sam_ctx, &primary_group_blob, true, filter,
 363                                            user_info_dc, &sids, &num_sids);
 364         if (!NT_STATUS_IS_OK(status)) {
 365                 talloc_free(user_info_dc);
 366                 return status;
 367         }
 368
 369         /* Expands the additional groups */
 370         el = ldb_msg_find_element(msg, "memberOf");
 371         for (i = 0; el && i < el->num_values; i++) {
 372                 /* This function takes in memberOf values and expands
 373                  * them, as long as they meet the filter - so only
 374                  * domain groups, not builtin groups */
 375                 status = dsdb_expand_nested_groups(sam_ctx, &el->values[i], false, filter,
 376                                                    user_info_dc, &sids, &num_sids);
 377                 if (!NT_STATUS_IS_OK(status)) {
 378                         talloc_free(user_info_dc);
 379                         return status;
 380                 }
 381         }
 382
 383         user_info_dc->sids = sids;
 384         user_info_dc->num_sids = num_sids;
 385
 386         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 387         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 388
 389         info->account_name = talloc_steal(info,
 390                 ldb_msg_find_attr_as_string(msg, "sAMAccountName", NULL));
 391
 392         info->domain_name = talloc_strdup(info, domain_name);
 393         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(info->domain_name,
 394                 user_info_dc);
 395
 396         str = ldb_msg_find_attr_as_string(msg, "displayName", "");
 397         info->full_name = talloc_strdup(info, str);
 398         if (info->full_name == NULL) {
 399                 TALLOC_FREE(user_info_dc);
 400                 return NT_STATUS_NO_MEMORY;
 401         }
 402
 403         str = ldb_msg_find_attr_as_string(msg, "scriptPath", "");
 404         info->logon_script = talloc_strdup(info, str);
 405         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(info->logon_script,
 406                 user_info_dc);
 407
 408         str = ldb_msg_find_attr_as_string(msg, "profilePath", "");
 409         info->profile_path = talloc_strdup(info, str);
 410         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(info->profile_path,
 411                 user_info_dc);
 412
 413         str = ldb_msg_find_attr_as_string(msg, "homeDirectory", "");
 414         info->home_directory = talloc_strdup(info, str);
 415         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(info->home_directory,
 416                 user_info_dc);
 417
 418         str = ldb_msg_find_attr_as_string(msg, "homeDrive", "");
 419         info->home_drive = talloc_strdup(info, str);
 420         if (info->home_drive == NULL) {
 421                 TALLOC_FREE(user_info_dc);
 422                 return NT_STATUS_NO_MEMORY;
 423         }
 424
 425         info->logon_server = talloc_strdup(info, netbios_name);
 426         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(info->logon_server,
 427                 user_info_dc);
 428
 429         info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
 430         info->last_logoff = samdb_result_last_logoff(msg);
 431         info->acct_expiry = samdb_result_account_expires(msg);
 432         info->last_password_change = samdb_result_nttime(msg,
 433                 "pwdLastSet", 0);
 434         info->allow_password_change
 435                 = samdb_result_allow_password_change(sam_ctx, mem_ctx,
 436                         domain_dn, msg, "pwdLastSet");
 437         info->force_password_change
 438                 = samdb_result_force_password_change(sam_ctx, mem_ctx,
 439                         domain_dn, msg);
 440         info->logon_count = ldb_msg_find_attr_as_uint(msg, "logonCount", 0);
 441         info->bad_password_count = ldb_msg_find_attr_as_uint(msg, "badPwdCount",
 442                 0);
 443
 444         info->acct_flags = samdb_result_acct_flags(sam_ctx, mem_ctx,
 445                                                           msg, domain_dn);
 446
 447         user_info_dc->user_session_key = data_blob_talloc(user_info_dc,
 448                                                          user_sess_key.data,
 449                                                          user_sess_key.length);
 450         if (user_sess_key.data) {
 451                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(user_info_dc->user_session_key.data,
 452                                                   user_info_dc);
 453         }
 454         user_info_dc->lm_session_key = data_blob_talloc(user_info_dc,
 455                                                        lm_sess_key.data,
 456                                                        lm_sess_key.length);
 457         if (lm_sess_key.data) {
 458                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(user_info_dc->lm_session_key.data,
 459                                                   user_info_dc);
 460         }
 461
 462         if (info->acct_flags & ACB_SVRTRUST) {
 463                 /* the SID_NT_ENTERPRISE_DCS SID gets added into the
 464                    PAC */
 465                 user_info_dc->sids = talloc_realloc(user_info_dc,
 466                                                    user_info_dc->sids,
 467                                                    struct dom_sid,
 468                                                    user_info_dc->num_sids+1);
 469                 if (user_info_dc->sids == NULL) {
 470                         TALLOC_FREE(user_info_dc);
 471                         return NT_STATUS_NO_MEMORY;
 472                 }
 473                 user_info_dc->sids[user_info_dc->num_sids] = global_sid_Enterprise_DCs;
 474                 user_info_dc->num_sids++;
 475         }
 476
 477         if ((info->acct_flags & (ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) ==
 478             (ACB_PARTIAL_SECRETS_ACCOUNT | ACB_WSTRUST)) {
 479                 /* the DOMAIN_RID_ENTERPRISE_READONLY_DCS PAC */
 480                 user_info_dc->sids = talloc_realloc(user_info_dc,
 481                                                    user_info_dc->sids,
 482                                                    struct dom_sid,
 483                                                    user_info_dc->num_sids+1);
 484                 if (user_info_dc->sids == NULL) {
 485                         TALLOC_FREE(user_info_dc);
 486                         return NT_STATUS_NO_MEMORY;
 487                 }
 488                 user_info_dc->sids[user_info_dc->num_sids] = *domain_sid;
 489                 sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
 490                             DOMAIN_RID_ENTERPRISE_READONLY_DCS);
 491                 user_info_dc->num_sids++;
 492         }
 493
 494         info->authenticated = true;
 495
 496         talloc_free(tmp_ctx);
 497         *_user_info_dc = user_info_dc;
 498
 499         return NT_STATUS_OK;
 500 }
 501
 502 NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
 503                                    TALLOC_CTX *mem_ctx, const char *principal,
 504                                    const char **attrs,
 505                                    struct ldb_dn **domain_dn,
 506                                    struct ldb_message **msg)
 507 {
 508         struct ldb_dn *user_dn;
 509         NTSTATUS nt_status;
 510         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 511         int ret;
 512
 513         if (!tmp_ctx) {
 514                 return NT_STATUS_NO_MEMORY;
 515         }
 516
 517         nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal,
 518                                               &user_dn, domain_dn);
 519         if (!NT_STATUS_IS_OK(nt_status)) {
 520                 talloc_free(tmp_ctx);
 521                 return nt_status;
 522         }
 523
 524         /* pull the user attributes */
 525         ret = dsdb_search_one(sam_ctx, tmp_ctx, msg, user_dn,
 526                               LDB_SCOPE_BASE, attrs,
 527                               DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
 528                               "(objectClass=*)");
 529         if (ret != LDB_SUCCESS) {
 530                 talloc_free(tmp_ctx);
 531                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 532         }
 533         talloc_steal(mem_ctx, *msg);
 534         talloc_steal(mem_ctx, *domain_dn);
 535         talloc_free(tmp_ctx);
 536
 537         return NT_STATUS_OK;
 538 }
 539
 540 /* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available, and for tokenGroups in the DSDB stack.
 541
 542  Supply either a principal or a DN
 543 */
 544 NTSTATUS authsam_get_user_info_dc_principal(TALLOC_CTX *mem_ctx,
 545                                            struct loadparm_context *lp_ctx,
 546                                            struct ldb_context *sam_ctx,
 547                                            const char *principal,
 548                                            struct ldb_dn *user_dn,
 549                                            struct auth_user_info_dc **user_info_dc)
 550 {
 551         NTSTATUS nt_status;
 552         DATA_BLOB user_sess_key = data_blob(NULL, 0);
 553         DATA_BLOB lm_sess_key = data_blob(NULL, 0);
 554
 555         struct ldb_message *msg;
 556         struct ldb_dn *domain_dn;
 557
 558         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 559         if (!tmp_ctx) {
 560                 return NT_STATUS_NO_MEMORY;
 561         }
 562
 563         if (principal) {
 564                 nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal,
 565                                                       user_attrs, &domain_dn, &msg);
 566                 if (!NT_STATUS_IS_OK(nt_status)) {
 567                         talloc_free(tmp_ctx);
 568                         return nt_status;
 569                 }
 570         } else if (user_dn) {
 571                 struct dom_sid *user_sid, *domain_sid;
 572                 int ret;
 573                 /* pull the user attributes */
 574                 ret = dsdb_search_one(sam_ctx, tmp_ctx, &msg, user_dn,
 575                                       LDB_SCOPE_BASE, user_attrs,
 576                                       DSDB_SEARCH_SHOW_EXTENDED_DN | DSDB_SEARCH_NO_GLOBAL_CATALOG,
 577                                       "(objectClass=*)");
 578                 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 579                         talloc_free(tmp_ctx);
 580                         return NT_STATUS_NO_SUCH_USER;
 581                 } else if (ret != LDB_SUCCESS) {
 582                         talloc_free(tmp_ctx);
 583                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 584                 }
 585
 586                 user_sid = samdb_result_dom_sid(msg, msg, "objectSid");
 587
 588                 nt_status = dom_sid_split_rid(tmp_ctx, user_sid, &domain_sid, NULL);
 589                 if (!NT_STATUS_IS_OK(nt_status)) {
 590                         return nt_status;
 591                 }
 592
 593                 domain_dn = samdb_search_dn(sam_ctx, mem_ctx, NULL,
 594                                           "(&(objectSid=%s)(objectClass=domain))",
 595                                             ldap_encode_ndr_dom_sid(tmp_ctx, domain_sid));
 596                 if (!domain_dn) {
 597                         DEBUG(3, ("authsam_get_user_info_dc_principal: Failed to find domain with: SID %s\n",
 598                                   dom_sid_string(tmp_ctx, domain_sid)));
 599                         return NT_STATUS_NO_SUCH_USER;
 600                 }
 601
 602         } else {
 603                 return NT_STATUS_INVALID_PARAMETER;
 604         }
 605
 606         nt_status = authsam_make_user_info_dc(tmp_ctx, sam_ctx,
 607                                              lpcfg_netbios_name(lp_ctx),
 608                                              lpcfg_workgroup(lp_ctx),
 609                                              domain_dn,
 610                                              msg,
 611                                              user_sess_key, lm_sess_key,
 612                                              user_info_dc);
 613         if (!NT_STATUS_IS_OK(nt_status)) {
 614                 talloc_free(tmp_ctx);
 615                 return nt_status;
 616         }
 617
 618         talloc_steal(mem_ctx, *user_info_dc);
 619         talloc_free(tmp_ctx);
 620
 621         return NT_STATUS_OK;
 622 }