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 "system/time.h"
  25 #include "auth/auth.h"
  26 #include "dsdb/samdb/samdb.h"
  27 #include "db_wrap.h"
  28 #include "libcli/security/proto.h"
  29 #include "libcli/ldap/ldap.h"
  30
  31 static const char *user_attrs[] = {
  32         /* requried for the krb5 kdc*/
  33         "objectClass",
  34         "sAMAccountName",
  35         "userPrincipalName",
  36         "servicePrincipalName",
  37         "msDS-KeyVersionNumber",
  38         "krb5Key",
  39
  40         /* passwords */
  41         "lmPwdHash",
  42         "ntPwdHash",
  43
  44         "userAccountControl",
  45
  46         "pwdLastSet",
  47         "accountExpires",
  48
  49         "objectSid",
  50
  51         /* check 'allowed workstations' */
  52         "userWorkstations",
  53
  54         /* required for server_info, not access control: */
  55         "displayName",
  56         "scriptPath",
  57         "profilePath",
  58         "homeDirectory",
  59         "homeDrive",
  60         "lastLogon",
  61         "lastLogoff",
  62         "accountExpires",
  63         "badPwdCount",
  64         "logonCount",
  65         "primaryGroupID",
  66         NULL,
  67 };
  68
  69 static const char *domain_ref_attrs[] =  {"nETBIOSName", "nCName",
  70                                           "dnsRoot", "objectClass", NULL};
  71
  72 /****************************************************************************
  73  Do a specific test for an smb password being correct, given a smb_password and
  74  the lanman and NT responses.
  75 ****************************************************************************/
  76 static NTSTATUS authsam_password_ok(struct auth_context *auth_context,
  77                                     TALLOC_CTX *mem_ctx,
  78                                     uint16_t acct_flags,
  79                                     const struct samr_Password *lm_pwd,
  80                                     const struct samr_Password *nt_pwd,
  81                                     const struct auth_usersupplied_info *user_info,
  82                                     DATA_BLOB *user_sess_key,
  83                                     DATA_BLOB *lm_sess_key)
  84 {
  85         NTSTATUS status;
  86
  87         if (acct_flags & ACB_PWNOTREQ) {
  88                 if (lp_null_passwords()) {
  89                         DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n",
  90                                  user_info->mapped.account_name));
  91                         return NT_STATUS_OK;
  92                 } else {
  93                         DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n",
  94                                  user_info->mapped.account_name));
  95                         return NT_STATUS_LOGON_FAILURE;
  96                 }
  97         }
  98
  99         switch (user_info->password_state) {
 100         case AUTH_PASSWORD_PLAIN:
 101         {
 102                 const struct auth_usersupplied_info *user_info_temp;
 103                 status = encrypt_user_info(mem_ctx, auth_context,
 104                                            AUTH_PASSWORD_HASH,
 105                                            user_info, &user_info_temp);
 106                 if (!NT_STATUS_IS_OK(status)) {
 107                         DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
 108                         return status;
 109                 }
 110                 user_info = user_info_temp;
 111
 112                 /* NO break */
 113         }
 114         case AUTH_PASSWORD_HASH:
 115                 *lm_sess_key = data_blob(NULL, 0);
 116                 *user_sess_key = data_blob(NULL, 0);
 117                 status = hash_password_check(mem_ctx,
 118                                              user_info->password.hash.lanman,
 119                                              user_info->password.hash.nt,
 120                                              user_info->mapped.account_name,
 121                                              lm_pwd, nt_pwd);
 122                 NT_STATUS_NOT_OK_RETURN(status);
 123                 break;
 124
 125         case AUTH_PASSWORD_RESPONSE:
 126                 status = ntlm_password_check(mem_ctx, user_info->logon_parameters,
 127                                              &auth_context->challenge.data,
 128                                              &user_info->password.response.lanman,
 129                                              &user_info->password.response.nt,
 130                                              user_info->mapped.account_name,
 131                                              user_info->client.account_name,
 132                                              user_info->client.domain_name,
 133                                              lm_pwd, nt_pwd,
 134                                              user_sess_key, lm_sess_key);
 135                 NT_STATUS_NOT_OK_RETURN(status);
 136                 break;
 137         }
 138
 139         if (user_sess_key && user_sess_key->data) {
 140                 talloc_steal(auth_context, user_sess_key->data);
 141         }
 142         if (lm_sess_key && lm_sess_key->data) {
 143                 talloc_steal(auth_context, lm_sess_key->data);
 144         }
 145
 146         return NT_STATUS_OK;
 147 }
 148
 149
 150 /****************************************************************************
 151  Do a specific test for a SAM_ACCOUNT being vaild for this connection
 152  (ie not disabled, expired and the like).
 153 ****************************************************************************/
 154 NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
 155                             struct ldb_context *sam_ctx,
 156                             uint32_t logon_parameters,
 157                             struct ldb_message *msg,
 158                             struct ldb_message *msg_domain_ref,
 159                             const char *logon_workstation,
 160                             const char *name_for_logs)
 161 {
 162         uint16_t acct_flags;
 163         const char *workstation_list;
 164         NTTIME acct_expiry;
 165         NTTIME must_change_time;
 166         NTTIME last_set_time;
 167
 168         struct ldb_dn *domain_dn = samdb_result_dn(mem_ctx, msg_domain_ref, "nCName", ldb_dn_new(mem_ctx));
 169
 170         NTTIME now;
 171         DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs));
 172
 173         acct_flags = samdb_result_acct_flags(msg, "userAccountControl");
 174
 175         acct_expiry = samdb_result_nttime(msg, "accountExpires", 0);
 176         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
 177                                                               domain_dn, msg);
 178         last_set_time = samdb_result_nttime(msg, "pwdLastSet", 0);
 179
 180         workstation_list = samdb_result_string(msg, "userWorkstations", NULL);
 181
 182         /* Quit if the account was disabled. */
 183         if (acct_flags & ACB_DISABLED) {
 184                 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs));
 185                 return NT_STATUS_ACCOUNT_DISABLED;
 186         }
 187
 188         /* Quit if the account was locked out. */
 189         if (acct_flags & ACB_AUTOLOCK) {
 190                 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs));
 191                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 192         }
 193
 194         /* Test account expire time */
 195         unix_to_nt_time(&now, time(NULL));
 196         if (now > acct_expiry) {
 197                 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs));
 198                 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
 199                          nt_time_string(mem_ctx, acct_expiry)));
 200                 return NT_STATUS_ACCOUNT_EXPIRED;
 201         }
 202
 203         if (!(acct_flags & ACB_PWNOEXP)) {
 204                 /* check for immediate expiry "must change at next logon" */
 205                 if (must_change_time == 0 && last_set_time != 0) {
 206                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
 207                                  name_for_logs));
 208                         return NT_STATUS_PASSWORD_MUST_CHANGE;
 209                 }
 210
 211                 /* check for expired password */
 212                 if ((must_change_time != 0) && (must_change_time < now)) {
 213                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
 214                                  name_for_logs));
 215                         DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
 216                                  nt_time_string(mem_ctx, must_change_time)));
 217                         return NT_STATUS_PASSWORD_EXPIRED;
 218                 }
 219         }
 220
 221         /* Test workstation. Workstation list is comma separated. */
 222         if (logon_workstation && workstation_list && *workstation_list) {
 223                 BOOL invalid_ws = True;
 224                 int i;
 225                 const char **workstations = str_list_make(mem_ctx, workstation_list, ",");
 226
 227                 for (i = 0; workstations && workstations[i]; i++) {
 228                         DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
 229                                   workstations[i], logon_workstation));
 230
 231                         if (strequal(workstations[i], logon_workstation)) {
 232                                 invalid_ws = False;
 233                                 break;
 234                         }
 235                 }
 236
 237                 talloc_free(workstations);
 238
 239                 if (invalid_ws) {
 240                         return NT_STATUS_INVALID_WORKSTATION;
 241                 }
 242         }
 243
 244         if (acct_flags & ACB_DOMTRUST) {
 245                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs));
 246                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 247         }
 248
 249         if (!(logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
 250                 if (acct_flags & ACB_SVRTRUST) {
 251                         DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs));
 252                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 253                 }
 254         }
 255         if (!(logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
 256                 if (acct_flags & ACB_WSTRUST) {
 257                         DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs));
 258                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 259                 }
 260         }
 261
 262         return NT_STATUS_OK;
 263 }
 264
 265 /****************************************************************************
 266  Look for the specified user in the sam, return ldb result structures
 267 ****************************************************************************/
 268
 269 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 270                                        const char *account_name,
 271                                        const char *domain_name,
 272                                        struct ldb_message ***ret_msgs,
 273                                        struct ldb_message ***ret_msgs_domain_ref)
 274 {
 275         struct ldb_message **msgs_tmp;
 276         struct ldb_message **msgs;
 277         struct ldb_message **msgs_domain_ref;
 278
 279         int ret;
 280         int ret_domain;
 281
 282         const struct ldb_dn *domain_dn = NULL;
 283
 284         if (domain_name) {
 285                 char *escaped_domain = ldb_binary_encode_string(mem_ctx, domain_name);
 286                 /* find the domain's DN */
 287                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain_ref, domain_ref_attrs,
 288                                           "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 289                                           escaped_domain, escaped_domain);
 290                 if (ret_domain == -1) {
 291                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 292                 }
 293
 294                 if (ret_domain == 0) {
 295                         DEBUG(3,("sam_search_user: Couldn't find domain [%s] in samdb.\n",
 296                                  domain_name));
 297                         return NT_STATUS_NO_SUCH_USER;
 298                 }
 299
 300                 if (ret_domain > 1) {
 301                         DEBUG(0,("Found %d records matching domain [%s]\n",
 302                                  ret_domain, domain_name));
 303                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 304                 }
 305
 306                 domain_dn = samdb_result_dn(mem_ctx, msgs_domain_ref[0], "nCName", NULL);
 307         }
 308
 309         /* pull the user attributes */
 310         ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, user_attrs,
 311                            "(&(sAMAccountName=%s)(objectclass=user))",
 312                            ldb_binary_encode_string(mem_ctx, account_name));
 313         if (ret == -1) {
 314                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 315         }
 316
 317         if (ret == 0) {
 318                 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb.\n",
 319                          account_name));
 320                 return NT_STATUS_NO_SUCH_USER;
 321         }
 322
 323         if (ret > 1) {
 324                 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
 325                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 326         }
 327
 328         if (!domain_name) {
 329                 struct dom_sid *domain_sid;
 330
 331                 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
 332                 if (!domain_sid) {
 333                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 334                 }
 335
 336                 /* find the domain's DN */
 337                 ret = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_tmp, NULL,
 338                                    "(&(objectSid=%s)(objectclass=domain))",
 339                                    ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
 340                 if (ret == -1) {
 341                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 342                 }
 343
 344                 if (ret == 0) {
 345                         DEBUG(3,("check_sam_security: Couldn't find domain_sid [%s] in passdb file.\n",
 346                                  dom_sid_string(mem_ctx, domain_sid)));
 347                         return NT_STATUS_NO_SUCH_USER;
 348                 }
 349
 350                 if (ret > 1) {
 351                         DEBUG(0,("Found %d records matching domain_sid [%s]\n",
 352                                  ret, dom_sid_string(mem_ctx, domain_sid)));
 353                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 354                 }
 355
 356                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain_ref, domain_ref_attrs,
 357                                           "(nCName=%s)", ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn));
 358
 359                 if (ret_domain == -1) {
 360                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 361                 }
 362
 363                 if (ret_domain == 0) {
 364                         DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
 365                                  ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 366                         return NT_STATUS_NO_SUCH_USER;
 367                 }
 368
 369                 if (ret_domain > 1) {
 370                         DEBUG(0,("Found %d records matching domain [%s]\n",
 371                                  ret_domain, ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 372                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 373                 }
 374
 375         }
 376
 377         *ret_msgs = msgs;
 378         *ret_msgs_domain_ref = msgs_domain_ref;
 379
 380         return NT_STATUS_OK;
 381 }
 382
 383 static NTSTATUS authsam_authenticate(struct auth_context *auth_context,
 384                                      TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 385                                      struct ldb_message **msgs,
 386                                      struct ldb_message **msgs_domain_ref,
 387                                      const struct auth_usersupplied_info *user_info,
 388                                      DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
 389 {
 390         struct samr_Password *lm_pwd, *nt_pwd;
 391         NTSTATUS nt_status;
 392         uint16_t acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 393
 394         /* Quit if the account was locked out. */
 395         if (acct_flags & ACB_AUTOLOCK) {
 396                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
 397                          user_info->mapped.account_name));
 398                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 399         }
 400
 401         /* You can only do an interactive login to normal accounts */
 402         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 403                 if (!(acct_flags & ACB_NORMAL)) {
 404                         return NT_STATUS_NO_SUCH_USER;
 405                 }
 406         }
 407
 408         nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
 409         NT_STATUS_NOT_OK_RETURN(nt_status);
 410
 411         nt_status = authsam_password_ok(auth_context, mem_ctx,
 412                                         acct_flags, lm_pwd, nt_pwd,
 413                                         user_info, user_sess_key, lm_sess_key);
 414         NT_STATUS_NOT_OK_RETURN(nt_status);
 415
 416         nt_status = authsam_account_ok(mem_ctx, sam_ctx,
 417                                        user_info->logon_parameters,
 418                                        msgs[0],
 419                                        msgs_domain_ref[0],
 420                                        user_info->workstation_name,
 421                                        user_info->mapped.account_name);
 422
 423         return nt_status;
 424 }
 425
 426 NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 427                                   struct ldb_message *msg,
 428                                   struct ldb_message *msg_domain_ref,
 429                                   DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 430                                   struct auth_serversupplied_info **_server_info)
 431 {
 432         struct auth_serversupplied_info *server_info;
 433         struct ldb_message **group_msgs;
 434         int group_ret;
 435         const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
 436         /* find list of sids */
 437         struct dom_sid **groupSIDs = NULL;
 438         struct dom_sid *account_sid;
 439         struct dom_sid *primary_group_sid;
 440         const char *str;
 441         struct ldb_dn *ncname;
 442         int i;
 443         uint_t rid;
 444         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 445
 446         group_ret = gendb_search(sam_ctx,
 447                                  tmp_ctx, NULL, &group_msgs, group_attrs,
 448                                  "(&(member=%s)(sAMAccountType=*))",
 449                                  ldb_dn_linearize(tmp_ctx, msg->dn));
 450         if (group_ret == -1) {
 451                 talloc_free(tmp_ctx);
 452                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 453         }
 454
 455         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 456         NT_STATUS_HAVE_NO_MEMORY(server_info);
 457
 458         if (group_ret > 0) {
 459                 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
 460                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
 461         }
 462
 463         /* Need to unroll some nested groups, but not aliases */
 464         for (i = 0; i < group_ret; i++) {
 465                 groupSIDs[i] = samdb_result_dom_sid(groupSIDs,
 466                                                     group_msgs[i], "objectSid");
 467                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
 468         }
 469
 470         talloc_free(tmp_ctx);
 471
 472         account_sid = samdb_result_dom_sid(server_info, msg, "objectSid");
 473         NT_STATUS_HAVE_NO_MEMORY(account_sid);
 474
 475         primary_group_sid = dom_sid_dup(server_info, account_sid);
 476         NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
 477
 478         rid = samdb_result_uint(msg, "primaryGroupID", ~0);
 479         if (rid == ~0) {
 480                 if (group_ret > 0) {
 481                         primary_group_sid = groupSIDs[0];
 482                 } else {
 483                         primary_group_sid = NULL;
 484                 }
 485         } else {
 486                 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
 487         }
 488
 489         server_info->account_sid = account_sid;
 490         server_info->primary_group_sid = primary_group_sid;
 491
 492         server_info->n_domain_groups = group_ret;
 493         server_info->domain_groups = groupSIDs;
 494
 495         server_info->account_name = talloc_steal(server_info, samdb_result_string(msg, "sAMAccountName", NULL));
 496
 497         server_info->domain_name = talloc_steal(server_info, samdb_result_string(msg_domain_ref, "nETBIOSName", NULL));
 498
 499         str = samdb_result_string(msg, "displayName", "");
 500         server_info->full_name = talloc_strdup(server_info, str);
 501         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 502
 503         str = samdb_result_string(msg, "scriptPath", "");
 504         server_info->logon_script = talloc_strdup(server_info, str);
 505         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 506
 507         str = samdb_result_string(msg, "profilePath", "");
 508         server_info->profile_path = talloc_strdup(server_info, str);
 509         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 510
 511         str = samdb_result_string(msg, "homeDirectory", "");
 512         server_info->home_directory = talloc_strdup(server_info, str);
 513         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 514
 515         str = samdb_result_string(msg, "homeDrive", "");
 516         server_info->home_drive = talloc_strdup(server_info, str);
 517         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 518
 519         server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
 520         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
 521
 522         server_info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
 523         server_info->last_logoff = samdb_result_nttime(msg, "lastLogoff", 0);
 524         server_info->acct_expiry = samdb_result_nttime(msg, "accountExpires", 0);
 525         server_info->last_password_change = samdb_result_nttime(msg, "pwdLastSet", 0);
 526
 527         ncname = samdb_result_dn(mem_ctx, msg_domain_ref, "nCName", NULL);
 528         if (!ncname) {
 529                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 530         }
 531         server_info->allow_password_change
 532                 = samdb_result_allow_password_change(sam_ctx, mem_ctx,
 533                                                      ncname, msg, "pwdLastSet");
 534         server_info->force_password_change
 535                 = samdb_result_force_password_change(sam_ctx, mem_ctx,
 536                                                      ncname, msg);
 537
 538         server_info->logon_count = samdb_result_uint(msg, "logonCount", 0);
 539         server_info->bad_password_count = samdb_result_uint(msg, "badPwdCount", 0);
 540
 541         server_info->acct_flags = samdb_result_acct_flags(msg, "userAccountControl");
 542
 543         server_info->user_session_key = user_sess_key;
 544         server_info->lm_session_key = lm_sess_key;
 545
 546         server_info->authenticated = True;
 547
 548         *_server_info = server_info;
 549
 550         return NT_STATUS_OK;
 551 }
 552
 553 NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
 554                                    TALLOC_CTX *mem_ctx, const char *principal,
 555                                    struct ldb_message ***msgs,
 556                                    struct ldb_message ***msgs_domain_ref)
 557 {
 558         struct ldb_dn *user_dn, *domain_dn;
 559         NTSTATUS nt_status;
 560         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 561         int ret;
 562
 563         if (!tmp_ctx) {
 564                 return NT_STATUS_NO_MEMORY;
 565         }
 566
 567         nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal, &user_dn, &domain_dn);
 568         if (!NT_STATUS_IS_OK(nt_status)) {
 569                 talloc_free(tmp_ctx);
 570                 return nt_status;
 571         }
 572
 573         /* grab domain info from the reference */
 574         ret = gendb_search(sam_ctx, tmp_ctx, NULL, msgs_domain_ref, domain_ref_attrs,
 575                            "(ncName=%s)", ldb_dn_linearize(tmp_ctx, domain_dn));
 576
 577         if (ret != 1) {
 578                 talloc_free(tmp_ctx);
 579                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 580         }
 581
 582         /* pull the user attributes */
 583         ret = gendb_search_dn(sam_ctx, tmp_ctx,
 584                               user_dn, msgs, user_attrs);
 585         if (ret != 1) {
 586                 talloc_free(tmp_ctx);
 587                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 588         }
 589         talloc_steal(mem_ctx, *msgs);
 590         talloc_steal(mem_ctx, *msgs_domain_ref);
 591         talloc_free(tmp_ctx);
 592
 593         return NT_STATUS_OK;
 594 }
 595
 596 /* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available */
 597 NTSTATUS sam_get_server_info_principal(TALLOC_CTX *mem_ctx, const char *principal,
 598                                        struct auth_serversupplied_info **server_info)
 599 {
 600         NTSTATUS nt_status;
 601         DATA_BLOB user_sess_key = data_blob(NULL, 0);
 602         DATA_BLOB lm_sess_key = data_blob(NULL, 0);
 603
 604         struct ldb_message **msgs;
 605         struct ldb_message **msgs_domain_ref;
 606         struct ldb_context *sam_ctx;
 607
 608         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 609         if (!tmp_ctx) {
 610                 return NT_STATUS_NO_MEMORY;
 611         }
 612
 613         sam_ctx = samdb_connect(tmp_ctx, system_session(tmp_ctx));
 614         if (sam_ctx == NULL) {
 615                 talloc_free(tmp_ctx);
 616                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 617         }
 618
 619         nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal,
 620                                               &msgs, &msgs_domain_ref);
 621         if (!NT_STATUS_IS_OK(nt_status)) {
 622                 return nt_status;
 623         }
 624
 625         nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, msgs[0], msgs_domain_ref[0],
 626                                              user_sess_key, lm_sess_key,
 627                                              server_info);
 628         if (NT_STATUS_IS_OK(nt_status)) {
 629                 talloc_steal(mem_ctx, *server_info);
 630         }
 631         talloc_free(tmp_ctx);
 632         return nt_status;
 633 }
 634
 635 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
 636                                                  TALLOC_CTX *mem_ctx,
 637                                                  const char *domain,
 638                                                  const struct auth_usersupplied_info *user_info,
 639                                                  struct auth_serversupplied_info **server_info)
 640 {
 641         NTSTATUS nt_status;
 642         const char *account_name = user_info->mapped.account_name;
 643         struct ldb_message **msgs;
 644         struct ldb_message **domain_ref_msgs;
 645         struct ldb_context *sam_ctx;
 646         DATA_BLOB user_sess_key, lm_sess_key;
 647         TALLOC_CTX *tmp_ctx;
 648
 649         if (!account_name || !*account_name) {
 650                 /* 'not for me' */
 651                 return NT_STATUS_NOT_IMPLEMENTED;
 652         }
 653
 654         tmp_ctx = talloc_new(mem_ctx);
 655         if (!tmp_ctx) {
 656                 return NT_STATUS_NO_MEMORY;
 657         }
 658
 659         sam_ctx = samdb_connect(tmp_ctx, system_session(mem_ctx));
 660         if (sam_ctx == NULL) {
 661                 talloc_free(tmp_ctx);
 662                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 663         }
 664
 665         nt_status = authsam_search_account(tmp_ctx, sam_ctx, account_name, domain, &msgs, &domain_ref_msgs);
 666         if (!NT_STATUS_IS_OK(nt_status)) {
 667                 talloc_free(tmp_ctx);
 668                 return nt_status;
 669         }
 670
 671         nt_status = authsam_authenticate(ctx->auth_ctx, tmp_ctx, sam_ctx, msgs, domain_ref_msgs, user_info,
 672                                          &user_sess_key, &lm_sess_key);
 673         if (!NT_STATUS_IS_OK(nt_status)) {
 674                 talloc_free(tmp_ctx);
 675                 return nt_status;
 676         }
 677
 678         nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, msgs[0], domain_ref_msgs[0],
 679                                              user_sess_key, lm_sess_key,
 680                                              server_info);
 681         if (!NT_STATUS_IS_OK(nt_status)) {
 682                 talloc_free(tmp_ctx);
 683                 return nt_status;
 684         }
 685
 686         talloc_steal(mem_ctx, *server_info);
 687         talloc_free(tmp_ctx);
 688
 689         return NT_STATUS_OK;
 690 }
 691
 692 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
 693                                                     TALLOC_CTX *mem_ctx,
 694                                                     const struct auth_usersupplied_info *user_info,
 695                                                     struct auth_serversupplied_info **server_info)
 696 {
 697         return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
 698 }
 699
 700 /****************************************************************************
 701 Check SAM security (above) but with a few extra checks.
 702 ****************************************************************************/
 703 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
 704                                        TALLOC_CTX *mem_ctx,
 705                                        const struct auth_usersupplied_info *user_info,
 706                                        struct auth_serversupplied_info **server_info)
 707 {
 708         const char *domain;
 709         BOOL is_local_name, is_my_domain;
 710
 711         is_local_name = is_myname(user_info->mapped.domain_name);
 712         is_my_domain  = strequal(user_info->mapped.domain_name, lp_workgroup());
 713
 714         /* check whether or not we service this domain/workgroup name */
 715         switch (lp_server_role()) {
 716                 case ROLE_STANDALONE:
 717                         domain = lp_netbios_name();
 718                         break;
 719                 case ROLE_DOMAIN_MEMBER:
 720                         if (!is_local_name) {
 721                                 DEBUG(6,("authsam_check_password: %s is not one of my local names (%s)\n",
 722                                         user_info->mapped.domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER
 723                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
 724                                 return NT_STATUS_NOT_IMPLEMENTED;
 725                         }
 726                         domain = lp_netbios_name();
 727                         break;
 728                 case ROLE_DOMAIN_PDC:
 729                 case ROLE_DOMAIN_BDC:
 730                         if (!is_local_name && !is_my_domain) {
 731                                 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
 732                                         user_info->mapped.domain_name));
 733                                 return NT_STATUS_NOT_IMPLEMENTED;
 734                         }
 735                         domain = lp_workgroup();
 736                         break;
 737                 default:
 738                         DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
 739                         return NT_STATUS_NOT_IMPLEMENTED;
 740         }
 741
 742         return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
 743 }
 744
 745 static const struct auth_operations sam_ignoredomain_ops = {
 746         .name           = "sam_ignoredomain",
 747         .get_challenge  = auth_get_challenge_not_implemented,
 748         .check_password = authsam_ignoredomain_check_password
 749 };
 750
 751 static const struct auth_operations sam_ops = {
 752         .name           = "sam",
 753         .get_challenge  = auth_get_challenge_not_implemented,
 754         .check_password = authsam_check_password
 755 };
 756
 757 NTSTATUS auth_sam_init(void)
 758 {
 759         NTSTATUS ret;
 760
 761         ret = auth_register(&sam_ops);
 762         if (!NT_STATUS_IS_OK(ret)) {
 763                 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
 764                 return ret;
 765         }
 766
 767         ret = auth_register(&sam_ignoredomain_ops);
 768         if (!NT_STATUS_IS_OK(ret)) {
 769                 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));
 770                 return ret;
 771         }
 772
 773         return ret;
 774 }