source/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
  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 static NTSTATUS authsam_password_ok(struct auth_context *auth_context,
  34                                     TALLOC_CTX *mem_ctx,
  35                                     uint16_t acct_flags,
  36                                     const struct samr_Password *lm_pwd,
  37                                     const struct samr_Password *nt_pwd,
  38                                     const struct auth_usersupplied_info *user_info,
  39                                     DATA_BLOB *user_sess_key,
  40                                     DATA_BLOB *lm_sess_key)
  41 {
  42         NTSTATUS status;
  43
  44         if (acct_flags & ACB_PWNOTREQ) {
  45                 if (lp_null_passwords()) {
  46                         DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n",
  47                                  user_info->mapped.account_name));
  48                         return NT_STATUS_OK;
  49                 } else {
  50                         DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n",
  51                                  user_info->mapped.account_name));
  52                         return NT_STATUS_LOGON_FAILURE;
  53                 }
  54         }
  55
  56         switch (user_info->password_state) {
  57         case AUTH_PASSWORD_PLAIN:
  58         {
  59                 const struct auth_usersupplied_info *user_info_temp;
  60                 status = encrypt_user_info(mem_ctx, auth_context,
  61                                            AUTH_PASSWORD_HASH,
  62                                            user_info, &user_info_temp);
  63                 if (!NT_STATUS_IS_OK(status)) {
  64                         DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
  65                         return status;
  66                 }
  67                 user_info = user_info_temp;
  68
  69                 /* NO break */
  70         }
  71         case AUTH_PASSWORD_HASH:
  72                 *lm_sess_key = data_blob(NULL, 0);
  73                 *user_sess_key = data_blob(NULL, 0);
  74                 status = hash_password_check(mem_ctx,
  75                                              user_info->password.hash.lanman,
  76                                              user_info->password.hash.nt,
  77                                              user_info->mapped.account_name,
  78                                              lm_pwd, nt_pwd);
  79                 NT_STATUS_NOT_OK_RETURN(status);
  80                 break;
  81
  82         case AUTH_PASSWORD_RESPONSE:
  83                 status = ntlm_password_check(mem_ctx, &auth_context->challenge.data,
  84                                              &user_info->password.response.lanman,
  85                                              &user_info->password.response.nt,
  86                                              user_info->mapped.account_name,
  87                                              user_info->client.account_name,
  88                                              user_info->client.domain_name,
  89                                              lm_pwd, nt_pwd,
  90                                              user_sess_key, lm_sess_key);
  91                 NT_STATUS_NOT_OK_RETURN(status);
  92                 break;
  93         }
  94
  95         if (user_sess_key && user_sess_key->data) {
  96                 talloc_steal(auth_context, user_sess_key->data);
  97         }
  98         if (lm_sess_key && lm_sess_key->data) {
  99                 talloc_steal(auth_context, lm_sess_key->data);
 100         }
 101
 102         return NT_STATUS_OK;
 103 }
 104
 105
 106 /****************************************************************************
 107  Do a specific test for a SAM_ACCOUNT being vaild for this connection
 108  (ie not disabled, expired and the like).
 109 ****************************************************************************/
 110 static NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
 111                                    uint16_t acct_flags,
 112                                    NTTIME acct_expiry,
 113                                    NTTIME must_change_time,
 114                                    NTTIME last_set_time,
 115                                    const char *workstation_list,
 116                                    const struct auth_usersupplied_info *user_info)
 117 {
 118         NTTIME now;
 119         DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", user_info->mapped.account_name));
 120
 121         /* Quit if the account was disabled. */
 122         if (acct_flags & ACB_DISABLED) {
 123                 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", user_info->mapped.account_name));
 124                 return NT_STATUS_ACCOUNT_DISABLED;
 125         }
 126
 127         /* Quit if the account was locked out. */
 128         if (acct_flags & ACB_AUTOLOCK) {
 129                 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", user_info->mapped.account_name));
 130                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 131         }
 132
 133         /* Test account expire time */
 134         unix_to_nt_time(&now, time(NULL));
 135         if (now > acct_expiry) {
 136                 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", user_info->mapped.account_name));
 137                 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
 138                          nt_time_string(mem_ctx, acct_expiry)));
 139                 return NT_STATUS_ACCOUNT_EXPIRED;
 140         }
 141
 142         if (!(acct_flags & ACB_PWNOEXP)) {
 143                 /* check for immediate expiry "must change at next logon" */
 144                 if (must_change_time == 0 && last_set_time != 0) {
 145                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
 146                                  user_info->mapped.account_name));
 147                         return NT_STATUS_PASSWORD_MUST_CHANGE;
 148                 }
 149
 150                 /* check for expired password */
 151                 if ((must_change_time != 0) && (must_change_time < now)) {
 152                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
 153                                  user_info->mapped.account_name));
 154                         DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
 155                                  nt_time_string(mem_ctx, must_change_time)));
 156                         return NT_STATUS_PASSWORD_EXPIRED;
 157                 }
 158         }
 159
 160         /* Test workstation. Workstation list is comma separated. */
 161         if (workstation_list && *workstation_list) {
 162                 BOOL invalid_ws = True;
 163                 int i;
 164                 const char **workstations = str_list_make(mem_ctx, workstation_list, ",");
 165
 166                 for (i = 0; workstations && workstations[i]; i++) {
 167                         DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
 168                                   workstations[i], user_info->workstation_name));
 169
 170                         if (strequal(workstations[i], user_info->workstation_name)) {
 171                                 invalid_ws = False;
 172                                 break;
 173                         }
 174                 }
 175
 176                 talloc_free(workstations);
 177
 178                 if (invalid_ws) {
 179                         return NT_STATUS_INVALID_WORKSTATION;
 180                 }
 181         }
 182
 183         if (acct_flags & ACB_DOMTRUST) {
 184                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", user_info->mapped.account_name));
 185                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 186         }
 187
 188         if (acct_flags & ACB_SVRTRUST) {
 189                 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", user_info->mapped.account_name));
 190                 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 191         }
 192
 193         if (acct_flags & ACB_WSTRUST) {
 194                 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", user_info->mapped.account_name));
 195                 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 196         }
 197
 198         return NT_STATUS_OK;
 199 }
 200
 201 /****************************************************************************
 202  Look for the specified user in the sam, return ldb result structures
 203 ****************************************************************************/
 204
 205 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 206                                        const char *account_name,
 207                                        const char *domain_name,
 208                                        struct ldb_message ***ret_msgs,
 209                                        struct ldb_message ***ret_msgs_domain)
 210 {
 211         struct ldb_message **msgs_tmp;
 212         struct ldb_message **msgs;
 213         struct ldb_message **msgs_domain;
 214
 215         int ret;
 216         int ret_domain;
 217
 218         const struct ldb_dn *domain_dn = NULL;
 219
 220         const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash",
 221                                "userAccountControl",
 222                                "pwdLastSet",
 223                                "accountExpires",
 224                                "objectSid",
 225                                "userWorkstations",
 226
 227                                /* required for server_info, not access control: */
 228                                "sAMAccountName",
 229                                "displayName",
 230                                "scriptPath",
 231                                "profilePath",
 232                                "homeDirectory",
 233                                "homeDrive",
 234                                "lastLogon",
 235                                "lastLogoff",
 236                                "accountExpires",
 237                                "badPwdCount",
 238                                "logonCount",
 239                                "primaryGroupID",
 240                                NULL,
 241         };
 242
 243         const char *domain_attrs[] =  {"nETBIOSName", "nCName", NULL};
 244
 245         if (domain_name) {
 246                 /* find the domain's DN */
 247                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 248                                           "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 249                                           domain_name, domain_name);
 250                 if (ret_domain == -1) {
 251                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 252                 }
 253
 254                 if (ret_domain == 0) {
 255                         DEBUG(3,("sam_search_user: Couldn't find domain [%s] in samdb.\n",
 256                                  domain_name));
 257                         return NT_STATUS_NO_SUCH_USER;
 258                 }
 259
 260                 if (ret_domain > 1) {
 261                         DEBUG(0,("Found %d records matching domain [%s]\n",
 262                                  ret_domain, domain_name));
 263                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 264                 }
 265
 266                 domain_dn = samdb_result_dn(mem_ctx, msgs_domain[0], "nCName", NULL);
 267         }
 268
 269         /* pull the user attributes */
 270         ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, attrs,
 271                            "(&(sAMAccountName=%s)(objectclass=user))",
 272                            account_name);
 273         if (ret == -1) {
 274                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 275         }
 276
 277         if (ret == 0) {
 278                 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb.\n",
 279                          account_name));
 280                 return NT_STATUS_NO_SUCH_USER;
 281         }
 282
 283         if (ret > 1) {
 284                 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
 285                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 286         }
 287
 288         if (!domain_name) {
 289                 struct dom_sid *domain_sid;
 290
 291                 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
 292                 if (!domain_sid) {
 293                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 294                 }
 295
 296                 /* find the domain's DN */
 297                 ret = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_tmp, NULL,
 298                                    "(&(objectSid=%s)(objectclass=domain))",
 299                                    ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
 300                 if (ret == -1) {
 301                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 302                 }
 303
 304                 if (ret == 0) {
 305                         DEBUG(3,("check_sam_security: Couldn't find domain_sid [%s] in passdb file.\n",
 306                                  dom_sid_string(mem_ctx, domain_sid)));
 307                         return NT_STATUS_NO_SUCH_USER;
 308                 }
 309
 310                 if (ret > 1) {
 311                         DEBUG(0,("Found %d records matching domain_sid [%s]\n",
 312                                  ret, dom_sid_string(mem_ctx, domain_sid)));
 313                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 314                 }
 315
 316                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 317                                           "(nCName=%s)", ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn));
 318
 319                 if (ret_domain == -1) {
 320                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 321                 }
 322
 323                 if (ret_domain == 0) {
 324                         DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
 325                                  ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 326                         return NT_STATUS_NO_SUCH_USER;
 327                 }
 328
 329                 if (ret_domain > 1) {
 330                         DEBUG(0,("Found %d records matching domain [%s]\n",
 331                                  ret_domain, ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 332                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 333                 }
 334
 335         }
 336
 337         *ret_msgs = msgs;
 338         *ret_msgs_domain = msgs_domain;
 339
 340         return NT_STATUS_OK;
 341 }
 342
 343 static NTSTATUS authsam_authenticate(struct auth_context *auth_context,
 344                                      TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 345                                      struct ldb_message **msgs,
 346                                      struct ldb_message **msgs_domain,
 347                                      const struct auth_usersupplied_info *user_info,
 348                                      DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
 349 {
 350         uint16_t acct_flags;
 351         const char *workstation_list;
 352         NTTIME acct_expiry;
 353         NTTIME must_change_time;
 354         NTTIME last_set_time;
 355         struct samr_Password *lm_pwd, *nt_pwd;
 356         NTSTATUS nt_status;
 357         struct ldb_dn *domain_dn = samdb_result_dn(mem_ctx, msgs_domain[0], "nCName", ldb_dn_new(mem_ctx));
 358
 359         acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 360
 361         /* Quit if the account was locked out. */
 362         if (acct_flags & ACB_AUTOLOCK) {
 363                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
 364                          user_info->mapped.account_name));
 365                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 366         }
 367
 368         nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
 369         NT_STATUS_NOT_OK_RETURN(nt_status);
 370
 371         nt_status = authsam_password_ok(auth_context, mem_ctx,
 372                                         acct_flags, lm_pwd, nt_pwd,
 373                                         user_info, user_sess_key, lm_sess_key);
 374         NT_STATUS_NOT_OK_RETURN(nt_status);
 375
 376         acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 377         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
 378                                                               domain_dn, msgs[0],
 379                                                               "pwdLastSet");
 380         last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 381
 382         workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL);
 383
 384         nt_status = authsam_account_ok(mem_ctx, acct_flags,
 385                                        acct_expiry,
 386                                        must_change_time,
 387                                        last_set_time,
 388                                        workstation_list,
 389                                        user_info);
 390
 391         return nt_status;
 392 }
 393
 394 static NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 395                                          struct ldb_message **msgs,
 396                                          struct ldb_message **msgs_domain,
 397                                          DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 398                                          struct auth_serversupplied_info **_server_info)
 399 {
 400         struct auth_serversupplied_info *server_info;
 401         struct ldb_message **group_msgs;
 402         int group_ret;
 403         const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
 404         /* find list of sids */
 405         struct dom_sid **groupSIDs = NULL;
 406         struct dom_sid *account_sid;
 407         struct dom_sid *primary_group_sid;
 408         const char *str;
 409         struct ldb_dn *ncname;
 410         int i;
 411         uint_t rid;
 412         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 413
 414         group_ret = gendb_search(sam_ctx,
 415                                  tmp_ctx, NULL, &group_msgs, group_attrs,
 416                                  "(&(member=%s)(sAMAccountType=*))",
 417                                  ldb_dn_linearize(tmp_ctx, msgs[0]->dn));
 418         if (group_ret == -1) {
 419                 talloc_free(tmp_ctx);
 420                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 421         }
 422
 423         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 424         NT_STATUS_HAVE_NO_MEMORY(server_info);
 425
 426         if (group_ret > 0) {
 427                 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
 428                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
 429         }
 430
 431         /* Need to unroll some nested groups, but not aliases */
 432         for (i = 0; i < group_ret; i++) {
 433                 groupSIDs[i] = samdb_result_dom_sid(groupSIDs,
 434                                                     group_msgs[i], "objectSid");
 435                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
 436         }
 437
 438         talloc_free(tmp_ctx);
 439
 440         account_sid = samdb_result_dom_sid(server_info, msgs[0], "objectSid");
 441         NT_STATUS_HAVE_NO_MEMORY(account_sid);
 442
 443         primary_group_sid = dom_sid_dup(server_info, account_sid);
 444         NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
 445
 446         rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
 447         if (rid == ~0) {
 448                 if (group_ret > 0) {
 449                         primary_group_sid = groupSIDs[0];
 450                 } else {
 451                         primary_group_sid = NULL;
 452                 }
 453         } else {
 454                 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
 455         }
 456
 457         server_info->account_sid = account_sid;
 458         server_info->primary_group_sid = primary_group_sid;
 459
 460         server_info->n_domain_groups = group_ret;
 461         server_info->domain_groups = groupSIDs;
 462
 463         server_info->account_name = talloc_steal(server_info, samdb_result_string(msgs[0], "sAMAccountName", NULL));
 464
 465         server_info->domain_name = talloc_steal(server_info, samdb_result_string(msgs_domain[0], "nETBIOSName", NULL));
 466
 467         str = samdb_result_string(msgs[0], "displayName", "");
 468         server_info->full_name = talloc_strdup(server_info, str);
 469         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 470
 471         str = samdb_result_string(msgs[0], "scriptPath", "");
 472         server_info->logon_script = talloc_strdup(server_info, str);
 473         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 474
 475         str = samdb_result_string(msgs[0], "profilePath", "");
 476         server_info->profile_path = talloc_strdup(server_info, str);
 477         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 478
 479         str = samdb_result_string(msgs[0], "homeDirectory", "");
 480         server_info->home_directory = talloc_strdup(server_info, str);
 481         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 482
 483         str = samdb_result_string(msgs[0], "homeDrive", "");
 484         server_info->home_drive = talloc_strdup(server_info, str);
 485         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 486
 487         server_info->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0);
 488         server_info->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0);
 489         server_info->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 490         server_info->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 491
 492         ncname = samdb_result_dn(mem_ctx, msgs_domain[0], "nCName", ldb_dn_new(mem_ctx));
 493
 494         server_info->allow_password_change = samdb_result_allow_password_change(sam_ctx, mem_ctx,
 495                                                         ncname, msgs[0], "pwdLastSet");
 496         server_info->force_password_change = samdb_result_force_password_change(sam_ctx, mem_ctx,
 497                                                         ncname, msgs[0], "pwdLastSet");
 498
 499         server_info->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
 500         server_info->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
 501
 502         server_info->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 503
 504         server_info->user_session_key = user_sess_key;
 505         server_info->lm_session_key = lm_sess_key;
 506
 507         server_info->authenticated = True;
 508
 509         *_server_info = server_info;
 510
 511         return NT_STATUS_OK;
 512 }
 513
 514 NTSTATUS sam_get_server_info(TALLOC_CTX *mem_ctx, const char *account_name, const char *domain_name,
 515                              DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 516                              struct auth_serversupplied_info **server_info)
 517 {
 518         NTSTATUS nt_status;
 519
 520         struct ldb_message **msgs;
 521         struct ldb_message **domain_msgs;
 522         void *sam_ctx;
 523
 524         sam_ctx = samdb_connect(mem_ctx, system_session(mem_ctx));
 525         if (sam_ctx == NULL) {
 526                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 527         }
 528
 529         nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain_name, &msgs, &domain_msgs);
 530         NT_STATUS_NOT_OK_RETURN(nt_status);
 531
 532         nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
 533                                              user_sess_key, lm_sess_key,
 534                                              server_info);
 535         NT_STATUS_NOT_OK_RETURN(nt_status);
 536
 537         talloc_free(msgs);
 538         talloc_free(domain_msgs);
 539
 540         return NT_STATUS_OK;
 541 }
 542
 543 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
 544                                                  TALLOC_CTX *mem_ctx,
 545                                                  const char *domain,
 546                                                  const struct auth_usersupplied_info *user_info,
 547                                                  struct auth_serversupplied_info **server_info)
 548 {
 549         NTSTATUS nt_status;
 550         const char *account_name = user_info->mapped.account_name;
 551         struct ldb_message **msgs;
 552         struct ldb_message **domain_msgs;
 553         struct ldb_context *sam_ctx;
 554         DATA_BLOB user_sess_key, lm_sess_key;
 555
 556         if (!account_name || !*account_name) {
 557                 /* 'not for me' */
 558                 return NT_STATUS_NOT_IMPLEMENTED;
 559         }
 560
 561         sam_ctx = samdb_connect(mem_ctx, system_session(mem_ctx));
 562         if (sam_ctx == NULL) {
 563                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 564         }
 565
 566         nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain, &msgs, &domain_msgs);
 567         NT_STATUS_NOT_OK_RETURN(nt_status);
 568
 569         nt_status = authsam_authenticate(ctx->auth_ctx, mem_ctx, sam_ctx, msgs, domain_msgs, user_info,
 570                                          &user_sess_key, &lm_sess_key);
 571         NT_STATUS_NOT_OK_RETURN(nt_status);
 572
 573         nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
 574                                              user_sess_key, lm_sess_key,
 575                                              server_info);
 576         NT_STATUS_NOT_OK_RETURN(nt_status);
 577
 578         talloc_free(msgs);
 579         talloc_free(domain_msgs);
 580
 581         return NT_STATUS_OK;
 582 }
 583
 584 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
 585                                                     TALLOC_CTX *mem_ctx,
 586                                                     const struct auth_usersupplied_info *user_info,
 587                                                     struct auth_serversupplied_info **server_info)
 588 {
 589         return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
 590 }
 591
 592 /****************************************************************************
 593 Check SAM security (above) but with a few extra checks.
 594 ****************************************************************************/
 595 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
 596                                        TALLOC_CTX *mem_ctx,
 597                                        const struct auth_usersupplied_info *user_info,
 598                                        struct auth_serversupplied_info **server_info)
 599 {
 600         const char *domain;
 601         BOOL is_local_name, is_my_domain;
 602
 603         is_local_name = is_myname(user_info->mapped.domain_name);
 604         is_my_domain  = strequal(user_info->mapped.domain_name, lp_workgroup());
 605
 606         /* check whether or not we service this domain/workgroup name */
 607         switch (lp_server_role()) {
 608                 case ROLE_STANDALONE:
 609                         domain = lp_netbios_name();
 610                         break;
 611                 case ROLE_DOMAIN_MEMBER:
 612                         if (!is_local_name) {
 613                                 DEBUG(6,("authsam_check_password: %s is not one of my local names (%s)\n",
 614                                         user_info->mapped.domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER
 615                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
 616                                 return NT_STATUS_NOT_IMPLEMENTED;
 617                         }
 618                         domain = lp_netbios_name();
 619                         break;
 620                 case ROLE_DOMAIN_PDC:
 621                 case ROLE_DOMAIN_BDC:
 622                         if (!is_local_name && !is_my_domain) {
 623                                 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
 624                                         user_info->mapped.domain_name));
 625                                 return NT_STATUS_NOT_IMPLEMENTED;
 626                         }
 627                         domain = lp_workgroup();
 628                         break;
 629                 default:
 630                         DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
 631                         return NT_STATUS_NOT_IMPLEMENTED;
 632         }
 633
 634         return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
 635 }
 636
 637 static const struct auth_operations sam_ignoredomain_ops = {
 638         .name           = "sam_ignoredomain",
 639         .get_challenge  = auth_get_challenge_not_implemented,
 640         .check_password = authsam_ignoredomain_check_password
 641 };
 642
 643 static const struct auth_operations sam_ops = {
 644         .name           = "sam",
 645         .get_challenge  = auth_get_challenge_not_implemented,
 646         .check_password = authsam_check_password
 647 };
 648
 649 NTSTATUS auth_sam_init(void)
 650 {
 651         NTSTATUS ret;
 652
 653         ret = auth_register(&sam_ops);
 654         if (!NT_STATUS_IS_OK(ret)) {
 655                 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
 656                 return ret;
 657         }
 658
 659         ret = auth_register(&sam_ignoredomain_ops);
 660         if (!NT_STATUS_IS_OK(ret)) {
 661                 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));
 662                 return ret;
 663         }
 664
 665         return ret;
 666 }