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