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    Copyright (C) Stefan Metzmacher                         2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "librpc/gen_ndr/ndr_samr.h"
  25 #include "system/time.h"
  26 #include "auth/auth.h"
  27 #include "lib/ldb/include/ldb.h"
  28 #include "pstring.h"
  29
  30 /****************************************************************************
  31  Do a specific test for an smb password being correct, given a smb_password and
  32  the lanman and NT responses.
  33 ****************************************************************************/
  34 static NTSTATUS authsam_password_ok(const struct auth_context *auth_context,
  35                                     TALLOC_CTX *mem_ctx,
  36                                     uint16_t acct_flags,
  37                                     const struct samr_Password *lm_pwd,
  38                                     const struct samr_Password *nt_pwd,
  39                                     const struct auth_usersupplied_info *user_info,
  40                                     DATA_BLOB *user_sess_key,
  41                                     DATA_BLOB *lm_sess_key)
  42 {
  43         NTSTATUS status;
  44
  45         if (acct_flags & ACB_PWNOTREQ) {
  46                 if (lp_null_passwords()) {
  47                         DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n",
  48                                  user_info->account_name));
  49                         return NT_STATUS_OK;
  50                 } else {
  51                         DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n",
  52                                  user_info->account_name));
  53                         return NT_STATUS_LOGON_FAILURE;
  54                 }
  55         }
  56
  57         status = ntlm_password_check(mem_ctx, &auth_context->challenge.data,
  58                                      &user_info->lm_resp, &user_info->nt_resp,
  59                                      &user_info->lm_interactive_password,
  60                                      &user_info->nt_interactive_password,
  61                                      user_info->account_name,
  62                                      user_info->client.account_name,
  63                                      user_info->client.domain_name,
  64                                      lm_pwd->hash, nt_pwd->hash,
  65                                      user_sess_key, lm_sess_key);
  66         NT_STATUS_NOT_OK_RETURN(status);
  67
  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         return NT_STATUS_OK;
  76 }
  77
  78
  79 /****************************************************************************
  80  Do a specific test for a SAM_ACCOUNT being vaild for this connection
  81  (ie not disabled, expired and the like).
  82 ****************************************************************************/
  83 static NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
  84                                    uint16_t acct_flags,
  85                                    NTTIME acct_expiry,
  86                                    NTTIME must_change_time,
  87                                    NTTIME last_set_time,
  88                                    const char *workstation_list,
  89                                    const struct auth_usersupplied_info *user_info)
  90 {
  91         DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", user_info->account_name));
  92
  93         /* Quit if the account was disabled. */
  94         if (acct_flags & ACB_DISABLED) {
  95                 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", user_info->account_name));
  96                 return NT_STATUS_ACCOUNT_DISABLED;
  97         }
  98
  99         /* Quit if the account was locked out. */
 100         if (acct_flags & ACB_AUTOLOCK) {
 101                 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", user_info->account_name));
 102                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 103         }
 104
 105         /* Test account expire time */
 106         if ((acct_expiry) != -1 && time(NULL) > nt_time_to_unix(acct_expiry)) {
 107                 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", user_info->account_name));
 108                 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
 109                          nt_time_string(mem_ctx, acct_expiry)));
 110                 return NT_STATUS_ACCOUNT_EXPIRED;
 111         }
 112
 113         if (!(acct_flags & ACB_PWNOEXP)) {
 114                 /* check for immediate expiry "must change at next logon" */
 115                 if (must_change_time == 0 && last_set_time != 0) {
 116                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
 117                                  user_info->account_name));
 118                         return NT_STATUS_PASSWORD_MUST_CHANGE;
 119                 }
 120
 121                 /* check for expired password */
 122                 if ((must_change_time) != 0 && nt_time_to_unix(must_change_time) < time(NULL)) {
 123                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
 124                                  user_info->account_name));
 125                         DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
 126                                  nt_time_string(mem_ctx, must_change_time)));
 127                         return NT_STATUS_PASSWORD_EXPIRED;
 128                 }
 129         }
 130
 131         /* Test workstation. Workstation list is comma separated. */
 132         if (workstation_list && *workstation_list) {
 133                 BOOL invalid_ws = True;
 134                 const char *s = workstation_list;
 135
 136                 fstring tok;
 137
 138                 while (next_token(&s, tok, ",", sizeof(tok))) {
 139                         DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
 140                                   tok, user_info->workstation_name));
 141
 142                         if (strequal(tok, user_info->workstation_name)) {
 143                                 invalid_ws = False;
 144
 145                                 break;
 146                         }
 147                 }
 148
 149                 if (invalid_ws) {
 150                         return NT_STATUS_INVALID_WORKSTATION;
 151                 }
 152         }
 153
 154         if (acct_flags & ACB_DOMTRUST) {
 155                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", user_info->account_name));
 156                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 157         }
 158
 159         if (acct_flags & ACB_SVRTRUST) {
 160                 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", user_info->account_name));
 161                 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 162         }
 163
 164         if (acct_flags & ACB_WSTRUST) {
 165                 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", user_info->account_name));
 166                 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 167         }
 168
 169         return NT_STATUS_OK;
 170 }
 171
 172 /****************************************************************************
 173  Look for the specified user in the sam, return ldb result structures
 174 ****************************************************************************/
 175
 176 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, void *sam_ctx,
 177                                        const char *account_name,
 178                                        const char *domain_name,
 179                                        struct ldb_message ***ret_msgs,
 180                                        struct ldb_message ***ret_msgs_domain)
 181 {
 182         struct ldb_message **msgs;
 183         struct ldb_message **msgs_domain;
 184
 185         int ret;
 186         int ret_domain;
 187
 188         const char *domain_dn = NULL;
 189
 190         const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash",
 191                                "userAccountControl",
 192                                "pwdLastSet",
 193                                "accountExpires",
 194                                "objectSid",
 195                                "userWorkstations",
 196
 197                                /* required for server_info, not access control: */
 198                                "sAMAccountName",
 199                                "displayName",
 200                                "scriptPath",
 201                                "profilePath",
 202                                "homeDirectory",
 203                                "homeDrive",
 204                                "lastLogon",
 205                                "lastLogoff",
 206                                "accountExpires",
 207                                "badPwdCount",
 208                                "logonCount",
 209                                "primaryGroupID",
 210                                NULL,
 211         };
 212
 213         const char *domain_attrs[] =  {"name", "objectSid"};
 214
 215         if (domain_name) {
 216                 /* find the domain's DN */
 217                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 218                                           "(&(|(realm=%s)(name=%s))(objectclass=domain))",
 219                                           domain_name, domain_name);
 220                 if (ret_domain == -1) {
 221                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 222                 }
 223
 224                 if (ret_domain == 0) {
 225                         DEBUG(3,("sam_search_user: Couldn't find domain [%s] in samdb.\n",
 226                                  domain_name));
 227                         return NT_STATUS_NO_SUCH_USER;
 228                 }
 229
 230                 if (ret_domain > 1) {
 231                         DEBUG(0,("Found %d records matching domain [%s]\n",
 232                                  ret_domain, domain_name));
 233                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 234                 }
 235
 236                 domain_dn = msgs_domain[0]->dn;
 237         }
 238
 239         /* pull the user attributes */
 240         ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, attrs,
 241                            "(&(sAMAccountName=%s)(objectclass=user))",
 242                            account_name);
 243         if (ret == -1) {
 244                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 245         }
 246
 247         if (ret == 0) {
 248                 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb.\n",
 249                          account_name));
 250                 return NT_STATUS_NO_SUCH_USER;
 251         }
 252
 253         if (ret > 1) {
 254                 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
 255                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 256         }
 257
 258         if (!domain_name) {
 259                 const char *domain_sid;
 260
 261                 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
 262                 if (!domain_sid) {
 263                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 264                 }
 265
 266                 /* find the domain's DN */
 267                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 268                                           "(&(objectSid=%s)(objectclass=domain))",
 269                                           domain_sid);
 270                 if (ret_domain == -1) {
 271                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 272                 }
 273
 274                 if (ret_domain == 0) {
 275                         DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
 276                                  domain_sid));
 277                         return NT_STATUS_NO_SUCH_USER;
 278                 }
 279
 280                 if (ret_domain > 1) {
 281                         DEBUG(0,("Found %d records matching domain [%s]\n",
 282                                  ret_domain, domain_sid));
 283                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 284                 }
 285         }
 286
 287         *ret_msgs = msgs;
 288         *ret_msgs_domain = msgs_domain;
 289
 290         return NT_STATUS_OK;
 291 }
 292
 293 static NTSTATUS authsam_authenticate(const struct auth_context *auth_context,
 294                                      TALLOC_CTX *mem_ctx, void *sam_ctx,
 295                                      struct ldb_message **msgs,
 296                                      struct ldb_message **msgs_domain,
 297                                      const struct auth_usersupplied_info *user_info,
 298                                      DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
 299 {
 300         uint16_t acct_flags;
 301         const char *workstation_list;
 302         NTTIME acct_expiry;
 303         NTTIME must_change_time;
 304         NTTIME last_set_time;
 305         struct samr_Password *lm_pwd, *nt_pwd;
 306         NTSTATUS nt_status;
 307         const char *domain_dn = msgs_domain[0]->dn;
 308
 309         acct_flags = samdb_result_acct_flags(msgs[0], "sAMAcctFlags");
 310
 311         /* Quit if the account was locked out. */
 312         if (acct_flags & ACB_AUTOLOCK) {
 313                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
 314                          user_info->account_name));
 315                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 316         }
 317
 318         nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
 319         NT_STATUS_NOT_OK_RETURN(nt_status);
 320
 321         nt_status = authsam_password_ok(auth_context, mem_ctx,
 322                                         acct_flags, lm_pwd, nt_pwd,
 323                                         user_info, user_sess_key, lm_sess_key);
 324         NT_STATUS_NOT_OK_RETURN(nt_status);
 325
 326         acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 327         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
 328                                                               domain_dn, msgs[0],
 329                                                               "pwdLastSet");
 330         last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 331
 332         workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL);
 333
 334         nt_status = authsam_account_ok(mem_ctx, acct_flags,
 335                                        acct_expiry,
 336                                        must_change_time,
 337                                        last_set_time,
 338                                        workstation_list,
 339                                        user_info);
 340
 341         return nt_status;
 342 }
 343
 344 static NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, void *sam_ctx,
 345                                          struct ldb_message **msgs,
 346                                          struct ldb_message **msgs_domain,
 347                                          DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 348                                          struct auth_serversupplied_info **_server_info)
 349 {
 350         struct auth_serversupplied_info *server_info;
 351         struct ldb_message **group_msgs;
 352         int group_ret;
 353         const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
 354         /* find list of sids */
 355         struct dom_sid **groupSIDs = NULL;
 356         struct dom_sid *account_sid;
 357         struct dom_sid *primary_group_sid;
 358         const char *str;
 359         int i;
 360         uint_t rid;
 361         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 362
 363         group_ret = gendb_search(sam_ctx,
 364                                  tmp_ctx, NULL, &group_msgs, group_attrs,
 365                                  "(&(member=%s)(sAMAccountType=*))",
 366                                  msgs[0]->dn);
 367         if (group_ret == -1) {
 368                 talloc_free(tmp_ctx);
 369                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 370         }
 371
 372         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 373         NT_STATUS_HAVE_NO_MEMORY(server_info);
 374
 375         if (group_ret > 0) {
 376                 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
 377                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
 378         }
 379
 380         /* Need to unroll some nested groups, but not aliases */
 381         for (i = 0; i < group_ret; i++) {
 382                 str = ldb_msg_find_string(group_msgs[i], "objectSid", NULL);
 383                 groupSIDs[i] = dom_sid_parse_talloc(groupSIDs, str);
 384                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
 385         }
 386
 387         talloc_free(tmp_ctx);
 388
 389         str = ldb_msg_find_string(msgs[0], "objectSid", NULL);
 390         account_sid = dom_sid_parse_talloc(server_info, str);
 391         NT_STATUS_HAVE_NO_MEMORY(account_sid);
 392
 393         primary_group_sid = dom_sid_dup(server_info, account_sid);
 394         NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
 395
 396         rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
 397         if (rid == ~0) {
 398                 if (group_ret > 0) {
 399                         primary_group_sid = groupSIDs[0];
 400                 } else {
 401                         primary_group_sid = NULL;
 402                 }
 403         } else {
 404                 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
 405         }
 406
 407         server_info->account_sid = account_sid;
 408         server_info->primary_group_sid = primary_group_sid;
 409
 410         server_info->n_domain_groups = group_ret;
 411         server_info->domain_groups = groupSIDs;
 412
 413         str = samdb_result_string(msgs[0], "sAMAccountName", "");
 414         server_info->account_name = talloc_strdup(server_info, str);
 415         NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 416
 417         str = samdb_result_string(msgs_domain[0], "name", "");
 418         server_info->domain_name = talloc_strdup(server_info, str);
 419         NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
 420
 421         str = samdb_result_string(msgs[0], "displayName", "");
 422         server_info->full_name = talloc_strdup(server_info, str);
 423         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 424
 425         str = samdb_result_string(msgs[0], "scriptPath", "");
 426         server_info->logon_script = talloc_strdup(server_info, str);
 427         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 428
 429         str = samdb_result_string(msgs[0], "profilePath", "");
 430         server_info->profile_path = talloc_strdup(server_info, str);
 431         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 432
 433         str = samdb_result_string(msgs[0], "homeDirectory", "");
 434         server_info->home_directory = talloc_strdup(server_info, str);
 435         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 436
 437         str = samdb_result_string(msgs[0], "homeDrive", "");
 438         server_info->home_drive = talloc_strdup(server_info, str);
 439         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 440
 441         server_info->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0);
 442         server_info->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0);
 443         server_info->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 444         server_info->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 445
 446         server_info->allow_password_change = samdb_result_allow_password_change(sam_ctx, mem_ctx,
 447                                                         msgs_domain[0]->dn, msgs[0], "pwdLastSet");
 448         server_info->force_password_change = samdb_result_force_password_change(sam_ctx, mem_ctx,
 449                                                         msgs_domain[0]->dn, msgs[0], "pwdLastSet");
 450
 451         server_info->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
 452         server_info->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
 453
 454         server_info->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 455
 456         server_info->user_session_key = user_sess_key;
 457         server_info->lm_session_key = lm_sess_key;
 458
 459         server_info->authenticated = True;
 460
 461         *_server_info = server_info;
 462
 463         return NT_STATUS_OK;
 464 }
 465
 466 NTSTATUS sam_get_server_info(TALLOC_CTX *mem_ctx, const char *account_name, const char *domain_name,
 467                              DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 468                              struct auth_serversupplied_info **server_info)
 469 {
 470         NTSTATUS nt_status;
 471
 472         struct ldb_message **msgs;
 473         struct ldb_message **domain_msgs;
 474         void *sam_ctx;
 475
 476         sam_ctx = samdb_connect(mem_ctx);
 477         if (sam_ctx == NULL) {
 478                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 479         }
 480
 481         nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain_name, &msgs, &domain_msgs);
 482         NT_STATUS_NOT_OK_RETURN(nt_status);
 483
 484         nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
 485                                              user_sess_key, lm_sess_key,
 486                                              server_info);
 487         NT_STATUS_NOT_OK_RETURN(nt_status);
 488
 489         talloc_free(msgs);
 490         talloc_free(domain_msgs);
 491
 492         return NT_STATUS_OK;
 493 }
 494
 495 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
 496                                                  TALLOC_CTX *mem_ctx,
 497                                                  const char *domain,
 498                                                  const struct auth_usersupplied_info *user_info,
 499                                                  struct auth_serversupplied_info **server_info)
 500 {
 501         NTSTATUS nt_status;
 502         const char *account_name = user_info->account_name;
 503         struct ldb_message **msgs;
 504         struct ldb_message **domain_msgs;
 505         void *sam_ctx;
 506         DATA_BLOB user_sess_key, lm_sess_key;
 507
 508         if (!account_name || !*account_name) {
 509                 /* 'not for me' */
 510                 return NT_STATUS_NOT_IMPLEMENTED;
 511         }
 512
 513         sam_ctx = samdb_connect(mem_ctx);
 514         if (sam_ctx == NULL) {
 515                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 516         }
 517
 518         nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain, &msgs, &domain_msgs);
 519         NT_STATUS_NOT_OK_RETURN(nt_status);
 520
 521         nt_status = authsam_authenticate(ctx->auth_ctx, mem_ctx, sam_ctx, msgs, domain_msgs, user_info,
 522                                          &user_sess_key, &lm_sess_key);
 523         NT_STATUS_NOT_OK_RETURN(nt_status);
 524
 525         nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
 526                                              user_sess_key, lm_sess_key,
 527                                              server_info);
 528         NT_STATUS_NOT_OK_RETURN(nt_status);
 529
 530         talloc_free(msgs);
 531         talloc_free(domain_msgs);
 532
 533         return NT_STATUS_OK;
 534 }
 535
 536 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
 537                                                     TALLOC_CTX *mem_ctx,
 538                                                     const struct auth_usersupplied_info *user_info,
 539                                                     struct auth_serversupplied_info **server_info)
 540 {
 541         return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
 542 }
 543
 544 /****************************************************************************
 545 Check SAM security (above) but with a few extra checks.
 546 ****************************************************************************/
 547 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
 548                                        TALLOC_CTX *mem_ctx,
 549                                        const struct auth_usersupplied_info *user_info,
 550                                        struct auth_serversupplied_info **server_info)
 551 {
 552         const char *domain;
 553         BOOL is_local_name, is_my_domain;
 554
 555         is_local_name = is_myname(user_info->domain_name);
 556         is_my_domain  = strequal(user_info->domain_name, lp_workgroup());
 557
 558         /* check whether or not we service this domain/workgroup name */
 559         switch (lp_server_role()) {
 560                 case ROLE_STANDALONE:
 561                         domain = lp_netbios_name();
 562                         break;
 563                 case ROLE_DOMAIN_MEMBER:
 564                         if (!is_local_name) {
 565                                 DEBUG(6,("authsam_check_password: %s is not one of my local names (%s)\n",
 566                                         user_info->domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER
 567                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
 568                                 return NT_STATUS_NOT_IMPLEMENTED;
 569                         }
 570                         domain = lp_netbios_name();
 571                         break;
 572                 case ROLE_DOMAIN_PDC:
 573                 case ROLE_DOMAIN_BDC:
 574                         if (!is_local_name && !is_my_domain) {
 575                                 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
 576                                         user_info->domain_name));
 577                                 return NT_STATUS_NOT_IMPLEMENTED;
 578                         }
 579                         domain = lp_workgroup();
 580                         break;
 581                 default:
 582                         DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
 583                         return NT_STATUS_NOT_IMPLEMENTED;
 584         }
 585
 586         return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
 587 }
 588
 589 static const struct auth_operations sam_ignoredomain_ops = {
 590         .name           = "sam_ignoredomain",
 591         .get_challenge  = auth_get_challenge_not_implemented,
 592         .check_password = authsam_ignoredomain_check_password
 593 };
 594
 595 static const struct auth_operations sam_ops = {
 596         .name           = "sam",
 597         .get_challenge  = auth_get_challenge_not_implemented,
 598         .check_password = authsam_check_password
 599 };
 600
 601 NTSTATUS auth_sam_init(void)
 602 {
 603         NTSTATUS ret;
 604
 605         ret = auth_register(&sam_ops);
 606         if (!NT_STATUS_IS_OK(ret)) {
 607                 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
 608                 return ret;
 609         }
 610
 611         ret = auth_register(&sam_ignoredomain_ops);
 612         if (!NT_STATUS_IS_OK(ret)) {
 613                 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));
 614                 return ret;
 615         }
 616
 617         return ret;
 618 }