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(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->mapped.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->mapped.account_name));
  53                         return NT_STATUS_LOGON_FAILURE;
  54                 }
  55         }
  56
  57         switch (user_info->password_state) {
  58         case AUTH_PASSWORD_PLAIN:
  59         {
  60                 const struct auth_usersupplied_info *user_info_temp;
  61                 status = encrypt_user_info(mem_ctx, auth_context,
  62                                            AUTH_PASSWORD_HASH,
  63                                            user_info, &user_info_temp);
  64                 if (!NT_STATUS_IS_OK(status)) {
  65                         DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
  66                         return status;
  67                 }
  68                 user_info = user_info_temp;
  69
  70                 /* NO break */
  71         }
  72         case AUTH_PASSWORD_HASH:
  73                 *lm_sess_key = data_blob(NULL, 0);
  74                 *user_sess_key = data_blob(NULL, 0);
  75                 status = hash_password_check(mem_ctx,
  76                                              user_info->password.hash.lanman,
  77                                              user_info->password.hash.nt,
  78                                              user_info->mapped.account_name,
  79                                              lm_pwd, nt_pwd);
  80                 NT_STATUS_NOT_OK_RETURN(status);
  81                 break;
  82
  83         case AUTH_PASSWORD_RESPONSE:
  84                 status = ntlm_password_check(mem_ctx, &auth_context->challenge.data,
  85                                              &user_info->password.response.lanman,
  86                                              &user_info->password.response.nt,
  87                                              user_info->mapped.account_name,
  88                                              user_info->client.account_name,
  89                                              user_info->client.domain_name,
  90                                              lm_pwd, nt_pwd,
  91                                              user_sess_key, lm_sess_key);
  92                 NT_STATUS_NOT_OK_RETURN(status);
  93                 break;
  94         }
  95
  96         if (user_sess_key && user_sess_key->data) {
  97                 talloc_steal(auth_context, user_sess_key->data);
  98         }
  99         if (lm_sess_key && lm_sess_key->data) {
 100                 talloc_steal(auth_context, lm_sess_key->data);
 101         }
 102
 103         return NT_STATUS_OK;
 104 }
 105
 106
 107 /****************************************************************************
 108  Do a specific test for a SAM_ACCOUNT being vaild for this connection
 109  (ie not disabled, expired and the like).
 110 ****************************************************************************/
 111 static NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
 112                                    uint16_t acct_flags,
 113                                    NTTIME acct_expiry,
 114                                    NTTIME must_change_time,
 115                                    NTTIME last_set_time,
 116                                    const char *workstation_list,
 117                                    const struct auth_usersupplied_info *user_info)
 118 {
 119         NTTIME now;
 120         DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", user_info->mapped.account_name));
 121
 122         /* Quit if the account was disabled. */
 123         if (acct_flags & ACB_DISABLED) {
 124                 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", user_info->mapped.account_name));
 125                 return NT_STATUS_ACCOUNT_DISABLED;
 126         }
 127
 128         /* Quit if the account was locked out. */
 129         if (acct_flags & ACB_AUTOLOCK) {
 130                 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", user_info->mapped.account_name));
 131                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 132         }
 133
 134         /* Test account expire time */
 135         unix_to_nt_time(&now, time(NULL));
 136         if (now > acct_expiry) {
 137                 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", user_info->mapped.account_name));
 138                 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
 139                          nt_time_string(mem_ctx, acct_expiry)));
 140                 return NT_STATUS_ACCOUNT_EXPIRED;
 141         }
 142
 143         if (!(acct_flags & ACB_PWNOEXP)) {
 144                 /* check for immediate expiry "must change at next logon" */
 145                 if (must_change_time == 0 && last_set_time != 0) {
 146                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
 147                                  user_info->mapped.account_name));
 148                         return NT_STATUS_PASSWORD_MUST_CHANGE;
 149                 }
 150
 151                 /* check for expired password */
 152                 if ((must_change_time != 0) && (must_change_time < now)) {
 153                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
 154                                  user_info->mapped.account_name));
 155                         DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
 156                                  nt_time_string(mem_ctx, must_change_time)));
 157                         return NT_STATUS_PASSWORD_EXPIRED;
 158                 }
 159         }
 160
 161         /* Test workstation. Workstation list is comma separated. */
 162         if (workstation_list && *workstation_list) {
 163                 BOOL invalid_ws = True;
 164                 const char *s = workstation_list;
 165
 166                 fstring tok;
 167
 168                 while (next_token(&s, tok, ",", sizeof(tok))) {
 169                         DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
 170                                   tok, user_info->workstation_name));
 171
 172                         if (strequal(tok, user_info->workstation_name)) {
 173                                 invalid_ws = False;
 174
 175                                 break;
 176                         }
 177                 }
 178
 179                 if (invalid_ws) {
 180                         return NT_STATUS_INVALID_WORKSTATION;
 181                 }
 182         }
 183
 184         if (acct_flags & ACB_DOMTRUST) {
 185                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", user_info->mapped.account_name));
 186                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 187         }
 188
 189         if (acct_flags & ACB_SVRTRUST) {
 190                 DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", user_info->mapped.account_name));
 191                 return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 192         }
 193
 194         if (acct_flags & ACB_WSTRUST) {
 195                 DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", user_info->mapped.account_name));
 196                 return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 197         }
 198
 199         return NT_STATUS_OK;
 200 }
 201
 202 /****************************************************************************
 203  Look for the specified user in the sam, return ldb result structures
 204 ****************************************************************************/
 205
 206 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 207                                        const char *account_name,
 208                                        const char *domain_name,
 209                                        struct ldb_message ***ret_msgs,
 210                                        struct ldb_message ***ret_msgs_domain)
 211 {
 212         struct ldb_message **msgs_tmp;
 213         struct ldb_message **msgs;
 214         struct ldb_message **msgs_domain;
 215
 216         int ret;
 217         int ret_domain;
 218
 219         const struct ldb_dn *domain_dn = NULL;
 220
 221         const char *attrs[] = {"unicodePwd", "lmPwdHash", "ntPwdHash",
 222                                "userAccountControl",
 223                                "pwdLastSet",
 224                                "accountExpires",
 225                                "objectSid",
 226                                "userWorkstations",
 227
 228                                /* required for server_info, not access control: */
 229                                "sAMAccountName",
 230                                "displayName",
 231                                "scriptPath",
 232                                "profilePath",
 233                                "homeDirectory",
 234                                "homeDrive",
 235                                "lastLogon",
 236                                "lastLogoff",
 237                                "accountExpires",
 238                                "badPwdCount",
 239                                "logonCount",
 240                                "primaryGroupID",
 241                                NULL,
 242         };
 243
 244         const char *domain_attrs[] =  {"nETBIOSName", "nCName", NULL};
 245
 246         if (domain_name) {
 247                 /* find the domain's DN */
 248                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 249                                           "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 250                                           domain_name, domain_name);
 251                 if (ret_domain == -1) {
 252                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 253                 }
 254
 255                 if (ret_domain == 0) {
 256                         DEBUG(3,("sam_search_user: Couldn't find domain [%s] in samdb.\n",
 257                                  domain_name));
 258                         return NT_STATUS_NO_SUCH_USER;
 259                 }
 260
 261                 if (ret_domain > 1) {
 262                         DEBUG(0,("Found %d records matching domain [%s]\n",
 263                                  ret_domain, domain_name));
 264                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 265                 }
 266
 267                 domain_dn = samdb_result_dn(mem_ctx, msgs_domain[0], "nCName", NULL);
 268         }
 269
 270         /* pull the user attributes */
 271         ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, attrs,
 272                            "(&(sAMAccountName=%s)(objectclass=user))",
 273                            account_name);
 274         if (ret == -1) {
 275                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 276         }
 277
 278         if (ret == 0) {
 279                 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb.\n",
 280                          account_name));
 281                 return NT_STATUS_NO_SUCH_USER;
 282         }
 283
 284         if (ret > 1) {
 285                 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
 286                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 287         }
 288
 289         if (!domain_name) {
 290                 struct dom_sid *domain_sid;
 291
 292                 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
 293                 if (!domain_sid) {
 294                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 295                 }
 296
 297                 /* find the domain's DN */
 298                 ret = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_tmp, NULL,
 299                                    "(&(objectSid=%s)(objectclass=domain))",
 300                                    ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
 301                 if (ret == -1) {
 302                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 303                 }
 304
 305                 if (ret == 0) {
 306                         DEBUG(3,("check_sam_security: Couldn't find domain_sid [%s] in passdb file.\n",
 307                                  dom_sid_string(mem_ctx, domain_sid)));
 308                         return NT_STATUS_NO_SUCH_USER;
 309                 }
 310
 311                 if (ret > 1) {
 312                         DEBUG(0,("Found %d records matching domain_sid [%s]\n",
 313                                  ret, dom_sid_string(mem_ctx, domain_sid)));
 314                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 315                 }
 316
 317                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain, domain_attrs,
 318                                           "(nCName=%s)", ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn));
 319
 320                 if (ret_domain == -1) {
 321                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 322                 }
 323
 324                 if (ret_domain == 0) {
 325                         DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
 326                                  ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 327                         return NT_STATUS_NO_SUCH_USER;
 328                 }
 329
 330                 if (ret_domain > 1) {
 331                         DEBUG(0,("Found %d records matching domain [%s]\n",
 332                                  ret_domain, ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 333                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 334                 }
 335
 336         }
 337
 338         *ret_msgs = msgs;
 339         *ret_msgs_domain = msgs_domain;
 340
 341         return NT_STATUS_OK;
 342 }
 343
 344 static NTSTATUS authsam_authenticate(struct auth_context *auth_context,
 345                                      TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 346                                      struct ldb_message **msgs,
 347                                      struct ldb_message **msgs_domain,
 348                                      const struct auth_usersupplied_info *user_info,
 349                                      DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
 350 {
 351         uint16_t acct_flags;
 352         const char *workstation_list;
 353         NTTIME acct_expiry;
 354         NTTIME must_change_time;
 355         NTTIME last_set_time;
 356         struct samr_Password *lm_pwd, *nt_pwd;
 357         NTSTATUS nt_status;
 358         struct ldb_dn *domain_dn = samdb_result_dn(mem_ctx, msgs_domain[0], "nCName", ldb_dn_new(mem_ctx));
 359
 360         acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 361
 362         /* Quit if the account was locked out. */
 363         if (acct_flags & ACB_AUTOLOCK) {
 364                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
 365                          user_info->mapped.account_name));
 366                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 367         }
 368
 369         nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
 370         NT_STATUS_NOT_OK_RETURN(nt_status);
 371
 372         nt_status = authsam_password_ok(auth_context, mem_ctx,
 373                                         acct_flags, lm_pwd, nt_pwd,
 374                                         user_info, user_sess_key, lm_sess_key);
 375         NT_STATUS_NOT_OK_RETURN(nt_status);
 376
 377         acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 378         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
 379                                                               domain_dn, msgs[0],
 380                                                               "pwdLastSet");
 381         last_set_time = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 382
 383         workstation_list = samdb_result_string(msgs[0], "userWorkstations", NULL);
 384
 385         nt_status = authsam_account_ok(mem_ctx, acct_flags,
 386                                        acct_expiry,
 387                                        must_change_time,
 388                                        last_set_time,
 389                                        workstation_list,
 390                                        user_info);
 391
 392         return nt_status;
 393 }
 394
 395 static NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 396                                          struct ldb_message **msgs,
 397                                          struct ldb_message **msgs_domain,
 398                                          DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 399                                          struct auth_serversupplied_info **_server_info)
 400 {
 401         struct auth_serversupplied_info *server_info;
 402         struct ldb_message **group_msgs;
 403         int group_ret;
 404         const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
 405         /* find list of sids */
 406         struct dom_sid **groupSIDs = NULL;
 407         struct dom_sid *account_sid;
 408         struct dom_sid *primary_group_sid;
 409         const char *str;
 410         struct ldb_dn *ncname;
 411         int i;
 412         uint_t rid;
 413         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 414
 415         group_ret = gendb_search(sam_ctx,
 416                                  tmp_ctx, NULL, &group_msgs, group_attrs,
 417                                  "(&(member=%s)(sAMAccountType=*))",
 418                                  ldb_dn_linearize(tmp_ctx, msgs[0]->dn));
 419         if (group_ret == -1) {
 420                 talloc_free(tmp_ctx);
 421                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 422         }
 423
 424         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 425         NT_STATUS_HAVE_NO_MEMORY(server_info);
 426
 427         if (group_ret > 0) {
 428                 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
 429                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
 430         }
 431
 432         /* Need to unroll some nested groups, but not aliases */
 433         for (i = 0; i < group_ret; i++) {
 434                 groupSIDs[i] = samdb_result_dom_sid(groupSIDs,
 435                                                     group_msgs[i], "objectSid");
 436                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
 437         }
 438
 439         talloc_free(tmp_ctx);
 440
 441         account_sid = samdb_result_dom_sid(server_info, msgs[0], "objectSid");
 442         NT_STATUS_HAVE_NO_MEMORY(account_sid);
 443
 444         primary_group_sid = dom_sid_dup(server_info, account_sid);
 445         NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
 446
 447         rid = samdb_result_uint(msgs[0], "primaryGroupID", ~0);
 448         if (rid == ~0) {
 449                 if (group_ret > 0) {
 450                         primary_group_sid = groupSIDs[0];
 451                 } else {
 452                         primary_group_sid = NULL;
 453                 }
 454         } else {
 455                 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
 456         }
 457
 458         server_info->account_sid = account_sid;
 459         server_info->primary_group_sid = primary_group_sid;
 460
 461         server_info->n_domain_groups = group_ret;
 462         server_info->domain_groups = groupSIDs;
 463
 464         server_info->account_name = talloc_steal(server_info, samdb_result_string(msgs[0], "sAMAccountName", NULL));
 465
 466         server_info->domain_name = talloc_steal(server_info, samdb_result_string(msgs_domain[0], "nETBIOSName", NULL));
 467
 468         str = samdb_result_string(msgs[0], "displayName", "");
 469         server_info->full_name = talloc_strdup(server_info, str);
 470         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 471
 472         str = samdb_result_string(msgs[0], "scriptPath", "");
 473         server_info->logon_script = talloc_strdup(server_info, str);
 474         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 475
 476         str = samdb_result_string(msgs[0], "profilePath", "");
 477         server_info->profile_path = talloc_strdup(server_info, str);
 478         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 479
 480         str = samdb_result_string(msgs[0], "homeDirectory", "");
 481         server_info->home_directory = talloc_strdup(server_info, str);
 482         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 483
 484         str = samdb_result_string(msgs[0], "homeDrive", "");
 485         server_info->home_drive = talloc_strdup(server_info, str);
 486         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 487
 488         server_info->last_logon = samdb_result_nttime(msgs[0], "lastLogon", 0);
 489         server_info->last_logoff = samdb_result_nttime(msgs[0], "lastLogoff", 0);
 490         server_info->acct_expiry = samdb_result_nttime(msgs[0], "accountExpires", 0);
 491         server_info->last_password_change = samdb_result_nttime(msgs[0], "pwdLastSet", 0);
 492
 493         ncname = samdb_result_dn(mem_ctx, msgs_domain[0], "nCName", ldb_dn_new(mem_ctx));
 494
 495         server_info->allow_password_change = samdb_result_allow_password_change(sam_ctx, mem_ctx,
 496                                                         ncname, msgs[0], "pwdLastSet");
 497         server_info->force_password_change = samdb_result_force_password_change(sam_ctx, mem_ctx,
 498                                                         ncname, msgs[0], "pwdLastSet");
 499
 500         server_info->logon_count = samdb_result_uint(msgs[0], "logonCount", 0);
 501         server_info->bad_password_count = samdb_result_uint(msgs[0], "badPwdCount", 0);
 502
 503         server_info->acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 504
 505         server_info->user_session_key = user_sess_key;
 506         server_info->lm_session_key = lm_sess_key;
 507
 508         server_info->authenticated = True;
 509
 510         *_server_info = server_info;
 511
 512         return NT_STATUS_OK;
 513 }
 514
 515 NTSTATUS sam_get_server_info(TALLOC_CTX *mem_ctx, const char *account_name, const char *domain_name,
 516                              DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 517                              struct auth_serversupplied_info **server_info)
 518 {
 519         NTSTATUS nt_status;
 520
 521         struct ldb_message **msgs;
 522         struct ldb_message **domain_msgs;
 523         void *sam_ctx;
 524
 525         sam_ctx = samdb_connect(mem_ctx);
 526         if (sam_ctx == NULL) {
 527                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 528         }
 529
 530         nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain_name, &msgs, &domain_msgs);
 531         NT_STATUS_NOT_OK_RETURN(nt_status);
 532
 533         nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
 534                                              user_sess_key, lm_sess_key,
 535                                              server_info);
 536         NT_STATUS_NOT_OK_RETURN(nt_status);
 537
 538         talloc_free(msgs);
 539         talloc_free(domain_msgs);
 540
 541         return NT_STATUS_OK;
 542 }
 543
 544 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
 545                                                  TALLOC_CTX *mem_ctx,
 546                                                  const char *domain,
 547                                                  const struct auth_usersupplied_info *user_info,
 548                                                  struct auth_serversupplied_info **server_info)
 549 {
 550         NTSTATUS nt_status;
 551         const char *account_name = user_info->mapped.account_name;
 552         struct ldb_message **msgs;
 553         struct ldb_message **domain_msgs;
 554         struct ldb_context *sam_ctx;
 555         DATA_BLOB user_sess_key, lm_sess_key;
 556
 557         if (!account_name || !*account_name) {
 558                 /* 'not for me' */
 559                 return NT_STATUS_NOT_IMPLEMENTED;
 560         }
 561
 562         sam_ctx = samdb_connect(mem_ctx);
 563         if (sam_ctx == NULL) {
 564                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 565         }
 566
 567         nt_status = authsam_search_account(mem_ctx, sam_ctx, account_name, domain, &msgs, &domain_msgs);
 568         NT_STATUS_NOT_OK_RETURN(nt_status);
 569
 570         nt_status = authsam_authenticate(ctx->auth_ctx, mem_ctx, sam_ctx, msgs, domain_msgs, user_info,
 571                                          &user_sess_key, &lm_sess_key);
 572         NT_STATUS_NOT_OK_RETURN(nt_status);
 573
 574         nt_status = authsam_make_server_info(mem_ctx, sam_ctx, msgs, domain_msgs,
 575                                              user_sess_key, lm_sess_key,
 576                                              server_info);
 577         NT_STATUS_NOT_OK_RETURN(nt_status);
 578
 579         talloc_free(msgs);
 580         talloc_free(domain_msgs);
 581
 582         return NT_STATUS_OK;
 583 }
 584
 585 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
 586                                                     TALLOC_CTX *mem_ctx,
 587                                                     const struct auth_usersupplied_info *user_info,
 588                                                     struct auth_serversupplied_info **server_info)
 589 {
 590         return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
 591 }
 592
 593 /****************************************************************************
 594 Check SAM security (above) but with a few extra checks.
 595 ****************************************************************************/
 596 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
 597                                        TALLOC_CTX *mem_ctx,
 598                                        const struct auth_usersupplied_info *user_info,
 599                                        struct auth_serversupplied_info **server_info)
 600 {
 601         const char *domain;
 602         BOOL is_local_name, is_my_domain;
 603
 604         is_local_name = is_myname(user_info->mapped.domain_name);
 605         is_my_domain  = strequal(user_info->mapped.domain_name, lp_workgroup());
 606
 607         /* check whether or not we service this domain/workgroup name */
 608         switch (lp_server_role()) {
 609                 case ROLE_STANDALONE:
 610                         domain = lp_netbios_name();
 611                         break;
 612                 case ROLE_DOMAIN_MEMBER:
 613                         if (!is_local_name) {
 614                                 DEBUG(6,("authsam_check_password: %s is not one of my local names (%s)\n",
 615                                         user_info->mapped.domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER
 616                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
 617                                 return NT_STATUS_NOT_IMPLEMENTED;
 618                         }
 619                         domain = lp_netbios_name();
 620                         break;
 621                 case ROLE_DOMAIN_PDC:
 622                 case ROLE_DOMAIN_BDC:
 623                         if (!is_local_name && !is_my_domain) {
 624                                 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
 625                                         user_info->mapped.domain_name));
 626                                 return NT_STATUS_NOT_IMPLEMENTED;
 627                         }
 628                         domain = lp_workgroup();
 629                         break;
 630                 default:
 631                         DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
 632                         return NT_STATUS_NOT_IMPLEMENTED;
 633         }
 634
 635         return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
 636 }
 637
 638 static const struct auth_operations sam_ignoredomain_ops = {
 639         .name           = "sam_ignoredomain",
 640         .get_challenge  = auth_get_challenge_not_implemented,
 641         .check_password = authsam_ignoredomain_check_password
 642 };
 643
 644 static const struct auth_operations sam_ops = {
 645         .name           = "sam",
 646         .get_challenge  = auth_get_challenge_not_implemented,
 647         .check_password = authsam_check_password
 648 };
 649
 650 NTSTATUS auth_sam_init(void)
 651 {
 652         NTSTATUS ret;
 653
 654         ret = auth_register(&sam_ops);
 655         if (!NT_STATUS_IS_OK(ret)) {
 656                 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
 657                 return ret;
 658         }
 659
 660         ret = auth_register(&sam_ignoredomain_ops);
 661         if (!NT_STATUS_IS_OK(ret)) {
 662                 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));
 663                 return ret;
 664         }
 665
 666         return ret;
 667 }