source4/auth/auth_sam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004
   5    Copyright (C) Gerald Carter                             2003
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23 #include "librpc/gen_ndr/ndr_samr.h"
  24 #include "system/time.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 /****************************************************************************
  30  Do a specific test for an smb password being correct, given a smb_password and
  31  the lanman and NT responses.
  32 ****************************************************************************/
  33
  34 static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
  35                                 TALLOC_CTX *mem_ctx,
  36                                 const char *username,
  37                                 uint16_t acct_flags,
  38                                 const struct samr_Password *lm_pwd,
  39                                 const struct samr_Password *nt_pwd,
  40                                 const struct auth_usersupplied_info *user_info,
  41                                 DATA_BLOB *user_sess_key,
  42                                 DATA_BLOB *lm_sess_key)
  43 {
  44         NTSTATUS status;
  45
  46         if (acct_flags & ACB_PWNOTREQ) {
  47                 if (lp_null_passwords()) {
  48                         DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n",
  49                                  username));
  50                         return NT_STATUS_OK;
  51                 } else {
  52                         DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n",
  53                                  username));
  54                         return NT_STATUS_LOGON_FAILURE;
  55                 }
  56         }
  57
  58         status = ntlm_password_check(mem_ctx, &auth_context->challenge,
  59                                    &user_info->lm_resp, &user_info->nt_resp,
  60                                    &user_info->lm_interactive_password,
  61                                    &user_info->nt_interactive_password,
  62                                    username,
  63                                    user_info->smb_name.str,
  64                                    user_info->client_domain.str,
  65                                    lm_pwd->hash, nt_pwd->hash, user_sess_key, lm_sess_key);
  66
  67         if (NT_STATUS_IS_OK(status)) {
  68                 if (user_sess_key && user_sess_key->data) {
  69                         talloc_steal(auth_context, user_sess_key->data);
  70                 }
  71                 if (lm_sess_key && lm_sess_key->data) {
  72                         talloc_steal(auth_context, lm_sess_key->data);
  73                 }
  74         }
  75
  76         return status;
  77 }
  78
  79
  80 /****************************************************************************
  81  Do a specific test for a SAM_ACCOUNT being vaild for this connection
  82  (ie not disabled, expired and the like).
  83 ****************************************************************************/
  84
  85 static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
  86                                const char *username,
  87                                uint16_t acct_flags,
  88                                NTTIME *acct_expiry,
  89                                NTTIME *must_change_time,
  90                                NTTIME *last_set_time,
  91                                const char *workstation_list,
  92                                const struct auth_usersupplied_info *user_info)
  93 {
  94         DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n", username));
  95
  96         /* Quit if the account was disabled. */
  97         if (acct_flags & ACB_DISABLED) {
  98                 DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", username));
  99                 return NT_STATUS_ACCOUNT_DISABLED;
 100         }
 101
 102         /* Quit if the account was locked out. */
 103         if (acct_flags & ACB_AUTOLOCK) {
 104                 DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", username));
 105                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 106         }
 107
 108         /* Test account expire time */
 109         if ((*acct_expiry) != -1 && time(NULL) > nt_time_to_unix(*acct_expiry)) {
 110                 DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", username));
 111                 DEBUG(3,("sam_account_ok: Account expired at '%s'.\n",
 112                          nt_time_string(mem_ctx, *acct_expiry)));
 113                 return NT_STATUS_ACCOUNT_EXPIRED;
 114         }
 115
 116         if (!(acct_flags & ACB_PWNOEXP)) {
 117
 118                 /* check for immediate expiry "must change at next logon" */
 119                 if (*must_change_time == 0 && *last_set_time != 0) {
 120                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
 121                                  username));
 122                         return NT_STATUS_PASSWORD_MUST_CHANGE;
 123                 }
 124
 125                 /* check for expired password */
 126                 if ((*must_change_time) != 0 && nt_time_to_unix(*must_change_time) < time(NULL)) {
 127                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
 128                                  username));
 129                         DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
 130                                  nt_time_string(mem_ctx, *must_change_time)));
 131                         return NT_STATUS_PASSWORD_EXPIRED;
 132                 }
 133         }
 134
 135         /* Test workstation. Workstation list is comma separated. */
 136
 137         if (workstation_list && *workstation_list) {
 138                 BOOL invalid_ws = True;
 139                 const char *s = workstation_list;
 140
 141                 fstring tok;
 142
 143                 while (next_token(&s, tok, ",", sizeof(tok))) {
 144                         DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n",
 145                                   tok, user_info->wksta_name.str, user_info->wksta_name.len));
 146
 147                         if(strequal(tok, user_info->wksta_name.str)) {
 148                                 invalid_ws = False;
 149
 150                                 break;
 151                         }
 152                 }
 153
 154                 if (invalid_ws)
 155                         return NT_STATUS_INVALID_WORKSTATION;
 156         }
 157
 158         if (acct_flags & ACB_DOMTRUST) {
 159                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", username));
 160                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 161         }
 162
 163         if (acct_flags & ACB_SVRTRUST) {
 164                 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", username));
 165                 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 166         }
 167
 168         if (acct_flags & ACB_WSTRUST) {
 169                 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", username));
 170                 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 171         }
 172
 173         return NT_STATUS_OK;
 174 }
 175
 176 /****************************************************************************
 177  Look for the specified user in the sam, return ldb result structures
 178 ****************************************************************************/
 179
 180 static NTSTATUS sam_search_user(const char *username, const char *domain,
 181                                 TALLOC_CTX *mem_ctx, void *sam_ctx,
 182                                 struct ldb_message ***ret_msgs,
 183                                 struct ldb_message ***ret_msgs_domain)
 184 {
 185         struct ldb_message **msgs;
 186         struct ldb_message **msgs_domain;
 187
 188         uint_t ret;
 189         uint_t ret_domain;
 190
 191         const char *domain_dn = NULL;
 192         const char *domain_sid;
 193
 194         const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash",
 195                                "userAccountControl",
 196                                "pwdLastSet",
 197                                "accountExpires",
 198                                "objectSid",
 199                                "userWorkstations",
 200
 201                                /* required for server_info, not access control: */
 202                                "sAMAccountName",
 203                                "displayName",
 204                                "scriptPath",
 205                                "profilePath",
 206                                "homeDirectory",
 207                                "homeDrive",
 208                                "lastLogon",
 209                                "lastLogoff",
 210                                "accountExpires",
 211                                "badPwdCount",
 212                                "logonCount",
 213                                "primaryGroupID",
 214                                NULL,
 215         };
 216
 217         const char *domain_attrs[] =  {"name", "objectSid"};
 218
 219         if (domain) {
 220                 /* find the domain's DN */
 221                 ret_domain = samdb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 222                                           "(&(|(realm=%s)(name=%s))(objectclass=domain))",
 223                                           domain, domain);
 224
 225                 if (ret_domain == 0) {
 226                         DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
 227                                  domain));
 228                         return NT_STATUS_NO_SUCH_USER;
 229                 }
 230
 231                 if (ret_domain > 1) {
 232                         DEBUG(0,("Found %d records matching domain [%s]\n",
 233                                  ret_domain, domain));
 234                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 235                 }
 236
 237                 domain_dn = msgs_domain[0]->dn;
 238
 239         }
 240         /* pull the user attributes */
 241         ret = samdb_search(sam_ctx, mem_ctx, domain_dn, &msgs, attrs,
 242                            "(&(sAMAccountName=%s)(objectclass=user))",
 243                            username);
 244
 245         if (ret == 0) {
 246                 DEBUG(3,("check_sam_security: Couldn't find user [%s] in passdb file.\n",
 247                          username));
 248                 return NT_STATUS_NO_SUCH_USER;
 249         }
 250
 251         if (ret > 1) {
 252                 DEBUG(0,("Found %d records matching user [%s]\n", ret, username));
 253                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 254         }
 255
 256         if (!domain) {
 257                 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
 258                 if (!domain_sid) {
 259                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 260                 }
 261
 262                 /* find the domain's DN */
 263                 ret_domain = samdb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 264                                           "(&(objectSid=%s)(objectclass=domain))",
 265                                           domain_sid);
 266
 267                 if (ret_domain == 0) {
 268                         DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
 269                                  domain_sid));
 270                         return NT_STATUS_NO_SUCH_USER;
 271                 }
 272
 273                 if (ret_domain > 1) {
 274                         DEBUG(0,("Found %d records matching domain [%s]\n",
 275                                  ret_domain, domain_sid));
 276                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 277                 }
 278
 279                 domain_dn = msgs_domain[0]->dn;
 280         }
 281         *ret_msgs = msgs;
 282         *ret_msgs_domain = msgs_domain;
 283
 284         return NT_STATUS_OK;
 285 }
 286
 287 NTSTATUS sam_check_password(const struct auth_context *auth_context,
 288                             const char *username,
 289                             TALLOC_CTX *mem_ctx, void *sam_ctx,
 290                             struct ldb_message **msgs,
 291                             const char *domain_dn,
 292                             const struct auth_usersupplied_info *user_info,
 293                             DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
 294 {
 295
 296         uint16_t acct_flags;
 297         const char *workstation_list;
 298         NTTIME acct_expiry;
 299         NTTIME must_change_time;
 300         NTTIME last_set_time;
 301         struct samr_Password *lm_pwd, *nt_pwd;
 302
 303         NTSTATUS nt_status;
 304
 305
 306         acct_flags = samdb_result_acct_flags(msgs[0], "sAMAcctFlags");
 307
 308         /* Quit if the account was locked out. */
 309         if (acct_flags & ACB_AUTOLOCK) {
 310                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
 311                          username));
 312                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 313         }
 314
 315         if (!NT_STATUS_IS_OK(nt_status = samdb_result_passwords(mem_ctx, msgs[0],
 316                                                                 &lm_pwd, &nt_pwd))) {
 317                 return nt_status;
 318         }
 319
 320         nt_status = sam_password_ok(auth_context, mem_ctx,
 321                                     username, acct_flags,
 322                                     lm_pwd, nt_pwd,
 323                                     user_info, user_sess_key, lm_sess_key);
 324
 325         if (!NT_STATUS_IS_OK(nt_status)) {
 326                 return nt_status;
 327         }
 328
 329         acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 330         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
 331                                                               domain_dn, msgs[0],
 332                                                               "pwdLastSet");
 333         last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 334
 335         workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL);
 336
 337         nt_status = sam_account_ok(mem_ctx, username, acct_flags,
 338                                    &acct_expiry,
 339                                    &must_change_time,
 340                                    &last_set_time,
 341                                    workstation_list,
 342                                    user_info);
 343
 344         return nt_status;
 345 }
 346
 347 NTSTATUS sam_make_server_info(TALLOC_CTX *mem_ctx, void *sam_ctx,
 348                               struct ldb_message **msgs, struct ldb_message **msgs_domain,
 349                               struct auth_serversupplied_info **server_info)
 350 {
 351
 352         struct ldb_message **group_msgs;
 353         int group_ret;
 354         const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
 355         /* find list of sids */
 356         struct dom_sid **groupSIDs = NULL;
 357         struct dom_sid *user_sid;
 358         struct dom_sid *primary_group_sid;
 359         const char *sidstr;
 360         int i;
 361         uint_t rid;
 362
 363         NTSTATUS nt_status;
 364
 365         if (!NT_STATUS_IS_OK(nt_status = make_server_info(mem_ctx, server_info,
 366                                                           samdb_result_string(msgs[0], "sAMAccountName", "")))) {
 367                 DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
 368                 return nt_status;
 369         }
 370
 371         group_ret = samdb_search(sam_ctx,
 372                                  mem_ctx, NULL, &group_msgs, group_attrs,
 373                                  "(&(member=%s)(sAMAccountType=*))",
 374                                  msgs[0]->dn);
 375         if (group_ret == -1) {
 376                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 377         }
 378
 379         if (group_ret > 0 &&
 380             !(groupSIDs = talloc_array_p(*server_info, struct dom_sid *, group_ret))) {
 381                 talloc_free(*server_info);
 382                 return NT_STATUS_NO_MEMORY;
 383         }
 384
 385         /* Need to unroll some nested groups, but not aliases */
 386         for (i = 0; i < group_ret; i++) {
 387                 sidstr = ldb_msg_find_string(group_msgs[i], "objectSid", NULL);
 388                 groupSIDs[i] = dom_sid_parse_talloc(*server_info, sidstr);
 389         }
 390
 391         sidstr = ldb_msg_find_string(msgs[0], "objectSid", NULL);
 392         user_sid = dom_sid_parse_talloc(*server_info, sidstr);
 393         primary_group_sid = dom_sid_parse_talloc(*server_info, sidstr);
 394         rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
 395         if (rid == ~0) {
 396                 if (group_ret > 0) {
 397                         primary_group_sid = groupSIDs[0];
 398                 } else {
 399                         primary_group_sid = NULL;
 400                 }
 401         } else {
 402                 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
 403         }
 404
 405         (*server_info)->user_sid = user_sid;
 406         (*server_info)->primary_group_sid = primary_group_sid;
 407
 408         (*server_info)->n_domain_groups = group_ret;
 409         (*server_info)->domain_groups = groupSIDs;
 410
 411         (*server_info)->account_name
 412                 = talloc_strdup(*server_info,
 413                                 samdb_result_string(msgs[0], "sAMAccountName", ""));
 414
 415         (*server_info)->domain
 416                 = talloc_strdup(*server_info,
 417                                 samdb_result_string(msgs_domain[0], "name", ""));
 418
 419         (*server_info)->full_name
 420                 = talloc_strdup(*server_info,
 421                                 samdb_result_string(msgs[0], "displayName", ""));
 422
 423         (*server_info)->logon_script
 424                 = talloc_strdup(*server_info,
 425                                 samdb_result_string(msgs[0], "scriptPath", ""));
 426         (*server_info)->profile_path
 427                 = talloc_strdup(*server_info,
 428                                 samdb_result_string(msgs[0], "profilePath", ""));
 429         (*server_info)->home_directory
 430                 = talloc_strdup(*server_info,
 431                                 samdb_result_string(msgs[0], "homeDirectory", ""));
 432
 433         (*server_info)->home_drive
 434                 = talloc_strdup(*server_info,
 435                                 samdb_result_string(msgs[0], "homeDrive", ""));
 436
 437         (*server_info)->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0);
 438         (*server_info)->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0);
 439         (*server_info)->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 440         (*server_info)->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 441         (*server_info)->allow_password_change
 442                 = samdb_result_allow_password_change(sam_ctx, mem_ctx,
 443                                                      msgs_domain[0]->dn, msgs[0], "pwdLastSet");
 444         (*server_info)->force_password_change
 445                 = samdb_result_force_password_change(sam_ctx, mem_ctx,
 446                                                      msgs_domain[0]->dn, msgs[0], "pwdLastSet");
 447
 448         (*server_info)->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
 449         (*server_info)->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
 450
 451         (*server_info)->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 452
 453         (*server_info)->guest = False;
 454
 455         if (!(*server_info)->account_name
 456             || !(*server_info)->full_name
 457             || !(*server_info)->logon_script
 458             || !(*server_info)->profile_path
 459             || !(*server_info)->home_directory
 460             || !(*server_info)->home_drive) {
 461                 talloc_destroy(*server_info);
 462                 return NT_STATUS_NO_MEMORY;
 463         }
 464
 465         return nt_status;
 466 }
 467
 468 NTSTATUS sam_get_server_info(const char *username, const char *domain, TALLOC_CTX *mem_ctx,
 469                              struct auth_serversupplied_info **server_info)
 470 {
 471         NTSTATUS nt_status;
 472
 473         struct ldb_message **msgs;
 474         struct ldb_message **domain_msgs;
 475         void *sam_ctx;
 476
 477         sam_ctx = samdb_connect(mem_ctx);
 478         if (sam_ctx == NULL) {
 479                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 480         }
 481
 482         nt_status = sam_search_user(username, domain, mem_ctx, sam_ctx, &msgs, &domain_msgs);
 483         if (!NT_STATUS_IS_OK(nt_status)) {
 484                 return nt_status;
 485         }
 486
 487         nt_status = sam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs, server_info);
 488         if (!NT_STATUS_IS_OK(nt_status)) {
 489                 return nt_status;
 490         }
 491
 492         return NT_STATUS_OK;
 493 }
 494
 495 static NTSTATUS check_sam_security_internals(const struct auth_context *auth_context,
 496                                              const char *domain,
 497                                              TALLOC_CTX *mem_ctx,
 498                                              const struct auth_usersupplied_info *user_info,
 499                                              struct auth_serversupplied_info **server_info)
 500 {
 501         NTSTATUS nt_status;
 502
 503         const char *username = user_info->internal_username.str;
 504         struct ldb_message **msgs;
 505         struct ldb_message **domain_msgs;
 506         void *sam_ctx;
 507         DATA_BLOB user_sess_key, lm_sess_key;
 508
 509         sam_ctx = samdb_connect(mem_ctx);
 510         if (sam_ctx == NULL) {
 511                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 512         }
 513
 514         nt_status = sam_search_user(username, domain, mem_ctx, sam_ctx, &msgs, &domain_msgs);
 515         if (!NT_STATUS_IS_OK(nt_status)) {
 516                 return nt_status;
 517         }
 518
 519         nt_status = sam_check_password(auth_context, username, mem_ctx, sam_ctx, msgs, domain_msgs[0]->dn, user_info,
 520                                        &user_sess_key, &lm_sess_key);
 521         if (!NT_STATUS_IS_OK(nt_status)) {
 522                 return nt_status;
 523         }
 524
 525         nt_status = sam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs, server_info);
 526         if (!NT_STATUS_IS_OK(nt_status)) {
 527                 return nt_status;
 528         }
 529
 530         talloc_reference(auth_context, *server_info);
 531
 532         (*server_info)->user_session_key = user_sess_key;
 533         (*server_info)->lm_session_key = lm_sess_key;
 534         return NT_STATUS_OK;
 535 }
 536
 537 static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 538                                    void *my_private_data,
 539                                    TALLOC_CTX *mem_ctx,
 540                                    const struct auth_usersupplied_info *user_info,
 541                                    struct auth_serversupplied_info **server_info)
 542 {
 543         return check_sam_security_internals(auth_context, NULL,
 544                                             mem_ctx, user_info, server_info);
 545 }
 546
 547 /* module initialisation */
 548 static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context,
 549                                            const char *param,
 550                                            struct auth_methods **auth_method)
 551 {
 552         if (!make_auth_methods(auth_context, auth_method)) {
 553                 return NT_STATUS_NO_MEMORY;
 554         }
 555
 556         (*auth_method)->auth = check_sam_security;
 557         (*auth_method)->name = "sam_ignoredomain";
 558         return NT_STATUS_OK;
 559 }
 560
 561
 562 /****************************************************************************
 563 Check SAM security (above) but with a few extra checks.
 564 ****************************************************************************/
 565
 566 static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
 567                                          void *my_private_data,
 568                                          TALLOC_CTX *mem_ctx,
 569                                          const struct auth_usersupplied_info *user_info,
 570                                          struct auth_serversupplied_info **server_info)
 571 {
 572         const char *domain;
 573         BOOL is_local_name, is_my_domain;
 574
 575         if (!user_info || !auth_context) {
 576                 return NT_STATUS_LOGON_FAILURE;
 577         }
 578
 579         is_local_name = is_myname(user_info->domain.str);
 580         is_my_domain  = strequal(user_info->domain.str, lp_workgroup());
 581
 582         /* check whether or not we service this domain/workgroup name */
 583
 584         switch ( lp_server_role() ) {
 585                 case ROLE_STANDALONE:
 586                 case ROLE_DOMAIN_MEMBER:
 587                         if ( !is_local_name ) {
 588                                 DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
 589                                         user_info->domain.str, (lp_server_role() == ROLE_DOMAIN_MEMBER
 590                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
 591                                 return NT_STATUS_NOT_IMPLEMENTED;
 592                         }
 593                         domain = lp_netbios_name();
 594                         break;
 595                 case ROLE_DOMAIN_PDC:
 596                 case ROLE_DOMAIN_BDC:
 597                         if ( !is_local_name && !is_my_domain ) {
 598                                 DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
 599                                         user_info->domain.str));
 600                                 return NT_STATUS_NOT_IMPLEMENTED;
 601                         }
 602                         domain = lp_workgroup();
 603                         break;
 604                 default: /* name is ok */
 605                         domain = user_info->domain.str;
 606                         break;
 607         }
 608
 609         return check_sam_security_internals(auth_context, domain, mem_ctx, user_info, server_info);
 610 }
 611
 612 /* module initialisation */
 613 static NTSTATUS auth_init_sam(struct auth_context *auth_context,
 614                               const char *param,
 615                               struct auth_methods **auth_method)
 616 {
 617         if (!make_auth_methods(auth_context, auth_method)) {
 618                 return NT_STATUS_NO_MEMORY;
 619         }
 620
 621         (*auth_method)->auth = check_samstrict_security;
 622         (*auth_method)->name = "sam";
 623         return NT_STATUS_OK;
 624 }
 625
 626 NTSTATUS auth_sam_init(void)
 627 {
 628         NTSTATUS ret;
 629         struct auth_operations ops;
 630
 631         ops.name = "sam";
 632         ops.init = auth_init_sam;
 633         ret = register_backend("auth", &ops);
 634         if (!NT_STATUS_IS_OK(ret)) {
 635                 DEBUG(0,("Failed to register '%s' auth backend!\n",
 636                         ops.name));
 637                 return ret;
 638         }
 639
 640         ops.name = "sam_ignoredomain";
 641         ops.init = auth_init_sam_ignoredomain;
 642         ret = register_backend("auth", &ops);
 643         if (!NT_STATUS_IS_OK(ret)) {
 644                 DEBUG(0,("Failed to register '%s' auth backend!\n",
 645                         ops.name));
 646                 return ret;
 647         }
 648
 649         return ret;
 650 }