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 "db_wrap.h"
  27 #include "dsdb/samdb/samdb.h"
  28 #include "libcli/security/proto.h"
  29 #include "libcli/ldap/ldap.h"
  30 #include "librpc/gen_ndr/ndr_security.h"
  31
  32 static const char *user_attrs[] = {
  33         /* requried for the krb5 kdc*/
  34         "objectClass",
  35         "sAMAccountName",
  36         "userPrincipalName",
  37         "servicePrincipalName",
  38         "msDS-KeyVersionNumber",
  39         "krb5Key",
  40
  41         /* passwords */
  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         last_set_time = samdb_result_nttime(msg, "pwdLastSet", 0);
 180
 181         workstation_list = samdb_result_string(msg, "userWorkstations", NULL);
 182
 183         /* Quit if the account was disabled. */
 184         if (acct_flags & ACB_DISABLED) {
 185                 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs));
 186                 return NT_STATUS_ACCOUNT_DISABLED;
 187         }
 188
 189         /* Quit if the account was locked out. */
 190         if (acct_flags & ACB_AUTOLOCK) {
 191                 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs));
 192                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 193         }
 194
 195         /* Test account expire time */
 196         unix_to_nt_time(&now, time(NULL));
 197         if (now > acct_expiry) {
 198                 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs));
 199                 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n",
 200                          nt_time_string(mem_ctx, acct_expiry)));
 201                 return NT_STATUS_ACCOUNT_EXPIRED;
 202         }
 203
 204         if (!(acct_flags & ACB_PWNOEXP)) {
 205                 /* check for immediate expiry "must change at next logon" */
 206                 if (must_change_time == 0 && last_set_time != 0) {
 207                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n",
 208                                  name_for_logs));
 209                         return NT_STATUS_PASSWORD_MUST_CHANGE;
 210                 }
 211
 212                 /* check for expired password */
 213                 if ((must_change_time != 0) && (must_change_time < now)) {
 214                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n",
 215                                  name_for_logs));
 216                         DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n",
 217                                  nt_time_string(mem_ctx, must_change_time)));
 218                         return NT_STATUS_PASSWORD_EXPIRED;
 219                 }
 220         }
 221
 222         /* Test workstation. Workstation list is comma separated. */
 223         if (logon_workstation && workstation_list && *workstation_list) {
 224                 BOOL invalid_ws = True;
 225                 int i;
 226                 const char **workstations = str_list_make(mem_ctx, workstation_list, ",");
 227
 228                 for (i = 0; workstations && workstations[i]; i++) {
 229                         DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
 230                                   workstations[i], logon_workstation));
 231
 232                         if (strequal(workstations[i], logon_workstation)) {
 233                                 invalid_ws = False;
 234                                 break;
 235                         }
 236                 }
 237
 238                 talloc_free(workstations);
 239
 240                 if (invalid_ws) {
 241                         return NT_STATUS_INVALID_WORKSTATION;
 242                 }
 243         }
 244
 245         if (acct_flags & ACB_DOMTRUST) {
 246                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs));
 247                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 248         }
 249
 250         if (!(logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
 251                 if (acct_flags & ACB_SVRTRUST) {
 252                         DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs));
 253                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 254                 }
 255         }
 256         if (!(logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
 257                 if (acct_flags & ACB_WSTRUST) {
 258                         DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs));
 259                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 260                 }
 261         }
 262
 263         return NT_STATUS_OK;
 264 }
 265
 266 /****************************************************************************
 267  Look for the specified user in the sam, return ldb result structures
 268 ****************************************************************************/
 269
 270 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 271                                        const char *account_name,
 272                                        const char *domain_name,
 273                                        struct ldb_message ***ret_msgs,
 274                                        struct ldb_message ***ret_msgs_domain_ref)
 275 {
 276         struct ldb_message **msgs_tmp;
 277         struct ldb_message **msgs;
 278         struct ldb_message **msgs_domain_ref;
 279
 280         int ret;
 281         int ret_domain;
 282
 283         const struct ldb_dn *domain_dn = NULL;
 284
 285         if (domain_name) {
 286                 char *escaped_domain = ldb_binary_encode_string(mem_ctx, domain_name);
 287                 /* find the domain's DN */
 288                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain_ref, domain_ref_attrs,
 289                                           "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 290                                           escaped_domain, escaped_domain);
 291                 if (ret_domain == -1) {
 292                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 293                 }
 294
 295                 if (ret_domain == 0) {
 296                         DEBUG(3,("sam_search_user: Couldn't find domain [%s] in samdb.\n",
 297                                  domain_name));
 298                         return NT_STATUS_NO_SUCH_USER;
 299                 }
 300
 301                 if (ret_domain > 1) {
 302                         DEBUG(0,("Found %d records matching domain [%s]\n",
 303                                  ret_domain, domain_name));
 304                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 305                 }
 306
 307                 domain_dn = samdb_result_dn(mem_ctx, msgs_domain_ref[0], "nCName", NULL);
 308         }
 309
 310         /* pull the user attributes */
 311         ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, user_attrs,
 312                            "(&(sAMAccountName=%s)(objectclass=user))",
 313                            ldb_binary_encode_string(mem_ctx, account_name));
 314         if (ret == -1) {
 315                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 316         }
 317
 318         if (ret == 0) {
 319                 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb.\n",
 320                          account_name));
 321                 return NT_STATUS_NO_SUCH_USER;
 322         }
 323
 324         if (ret > 1) {
 325                 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
 326                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 327         }
 328
 329         if (!domain_name) {
 330                 struct dom_sid *domain_sid;
 331
 332                 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
 333                 if (!domain_sid) {
 334                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 335                 }
 336
 337                 /* find the domain's DN */
 338                 ret = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_tmp, NULL,
 339                                    "(&(objectSid=%s)(objectclass=domain))",
 340                                    ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
 341                 if (ret == -1) {
 342                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 343                 }
 344
 345                 if (ret == 0) {
 346                         DEBUG(3,("check_sam_security: Couldn't find domain_sid [%s] in passdb file.\n",
 347                                  dom_sid_string(mem_ctx, domain_sid)));
 348                         return NT_STATUS_NO_SUCH_USER;
 349                 }
 350
 351                 if (ret > 1) {
 352                         DEBUG(0,("Found %d records matching domain_sid [%s]\n",
 353                                  ret, dom_sid_string(mem_ctx, domain_sid)));
 354                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 355                 }
 356
 357                 ret_domain = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_domain_ref, domain_ref_attrs,
 358                                           "(nCName=%s)", ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn));
 359
 360                 if (ret_domain == -1) {
 361                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 362                 }
 363
 364                 if (ret_domain == 0) {
 365                         DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
 366                                  ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 367                         return NT_STATUS_NO_SUCH_USER;
 368                 }
 369
 370                 if (ret_domain > 1) {
 371                         DEBUG(0,("Found %d records matching domain [%s]\n",
 372                                  ret_domain, ldb_dn_linearize(msgs_tmp, msgs_tmp[0]->dn)));
 373                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 374                 }
 375
 376         }
 377
 378         *ret_msgs = msgs;
 379         *ret_msgs_domain_ref = msgs_domain_ref;
 380
 381         return NT_STATUS_OK;
 382 }
 383
 384 static NTSTATUS authsam_authenticate(struct auth_context *auth_context,
 385                                      TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 386                                      struct ldb_message **msgs,
 387                                      struct ldb_message **msgs_domain_ref,
 388                                      const struct auth_usersupplied_info *user_info,
 389                                      DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
 390 {
 391         struct samr_Password *lm_pwd, *nt_pwd;
 392         NTSTATUS nt_status;
 393         uint16_t acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
 394
 395         /* Quit if the account was locked out. */
 396         if (acct_flags & ACB_AUTOLOCK) {
 397                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
 398                          user_info->mapped.account_name));
 399                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
 400         }
 401
 402         /* You can only do an interactive login to normal accounts */
 403         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 404                 if (!(acct_flags & ACB_NORMAL)) {
 405                         return NT_STATUS_NO_SUCH_USER;
 406                 }
 407         }
 408
 409         nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
 410         NT_STATUS_NOT_OK_RETURN(nt_status);
 411
 412         nt_status = authsam_password_ok(auth_context, mem_ctx,
 413                                         acct_flags, lm_pwd, nt_pwd,
 414                                         user_info, user_sess_key, lm_sess_key);
 415         NT_STATUS_NOT_OK_RETURN(nt_status);
 416
 417         nt_status = authsam_account_ok(mem_ctx, sam_ctx,
 418                                        user_info->logon_parameters,
 419                                        msgs[0],
 420                                        msgs_domain_ref[0],
 421                                        user_info->workstation_name,
 422                                        user_info->mapped.account_name);
 423
 424         return nt_status;
 425 }
 426
 427 NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 428                                   struct ldb_message *msg,
 429                                   struct ldb_message *msg_domain_ref,
 430                                   DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
 431                                   struct auth_serversupplied_info **_server_info)
 432 {
 433         struct auth_serversupplied_info *server_info;
 434         struct ldb_message **group_msgs;
 435         int group_ret;
 436         const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL };
 437         /* find list of sids */
 438         struct dom_sid **groupSIDs = NULL;
 439         struct dom_sid *account_sid;
 440         struct dom_sid *primary_group_sid;
 441         const char *str;
 442         struct ldb_dn *ncname;
 443         int i;
 444         uint_t rid;
 445         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 446
 447         group_ret = gendb_search(sam_ctx,
 448                                  tmp_ctx, NULL, &group_msgs, group_attrs,
 449                                  "(&(member=%s)(sAMAccountType=*))",
 450                                  ldb_dn_linearize(tmp_ctx, msg->dn));
 451         if (group_ret == -1) {
 452                 talloc_free(tmp_ctx);
 453                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 454         }
 455
 456         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 457         NT_STATUS_HAVE_NO_MEMORY(server_info);
 458
 459         if (group_ret > 0) {
 460                 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
 461                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
 462         }
 463
 464         /* Need to unroll some nested groups, but not aliases */
 465         for (i = 0; i < group_ret; i++) {
 466                 groupSIDs[i] = samdb_result_dom_sid(groupSIDs,
 467                                                     group_msgs[i], "objectSid");
 468                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
 469         }
 470
 471         talloc_free(tmp_ctx);
 472
 473         account_sid = samdb_result_dom_sid(server_info, msg, "objectSid");
 474         NT_STATUS_HAVE_NO_MEMORY(account_sid);
 475
 476         primary_group_sid = dom_sid_dup(server_info, account_sid);
 477         NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
 478
 479         rid = samdb_result_uint(msg, "primaryGroupID", ~0);
 480         if (rid == ~0) {
 481                 if (group_ret > 0) {
 482                         primary_group_sid = groupSIDs[0];
 483                 } else {
 484                         primary_group_sid = NULL;
 485                 }
 486         } else {
 487                 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
 488         }
 489
 490         server_info->account_sid = account_sid;
 491         server_info->primary_group_sid = primary_group_sid;
 492
 493         server_info->n_domain_groups = group_ret;
 494         server_info->domain_groups = groupSIDs;
 495
 496         server_info->account_name = talloc_steal(server_info, samdb_result_string(msg, "sAMAccountName", NULL));
 497
 498         server_info->domain_name = talloc_steal(server_info, samdb_result_string(msg_domain_ref, "nETBIOSName", NULL));
 499
 500         str = samdb_result_string(msg, "displayName", "");
 501         server_info->full_name = talloc_strdup(server_info, str);
 502         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 503
 504         str = samdb_result_string(msg, "scriptPath", "");
 505         server_info->logon_script = talloc_strdup(server_info, str);
 506         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 507
 508         str = samdb_result_string(msg, "profilePath", "");
 509         server_info->profile_path = talloc_strdup(server_info, str);
 510         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 511
 512         str = samdb_result_string(msg, "homeDirectory", "");
 513         server_info->home_directory = talloc_strdup(server_info, str);
 514         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 515
 516         str = samdb_result_string(msg, "homeDrive", "");
 517         server_info->home_drive = talloc_strdup(server_info, str);
 518         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 519
 520         server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
 521         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
 522
 523         server_info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
 524         server_info->last_logoff = samdb_result_nttime(msg, "lastLogoff", 0);
 525         server_info->acct_expiry = samdb_result_nttime(msg, "accountExpires", 0);
 526         server_info->last_password_change = samdb_result_nttime(msg, "pwdLastSet", 0);
 527
 528         ncname = samdb_result_dn(mem_ctx, msg_domain_ref, "nCName", NULL);
 529         if (!ncname) {
 530                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 531         }
 532         server_info->allow_password_change
 533                 = samdb_result_allow_password_change(sam_ctx, mem_ctx,
 534                                                      ncname, msg, "pwdLastSet");
 535         server_info->force_password_change
 536                 = samdb_result_force_password_change(sam_ctx, mem_ctx,
 537                                                      ncname, msg);
 538
 539         server_info->logon_count = samdb_result_uint(msg, "logonCount", 0);
 540         server_info->bad_password_count = samdb_result_uint(msg, "badPwdCount", 0);
 541
 542         server_info->acct_flags = samdb_result_acct_flags(msg, "userAccountControl");
 543
 544         server_info->user_session_key = user_sess_key;
 545         server_info->lm_session_key = lm_sess_key;
 546
 547         server_info->authenticated = True;
 548
 549         *_server_info = server_info;
 550
 551         return NT_STATUS_OK;
 552 }
 553
 554 NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
 555                                    TALLOC_CTX *mem_ctx, const char *principal,
 556                                    struct ldb_message ***msgs,
 557                                    struct ldb_message ***msgs_domain_ref)
 558 {
 559         struct ldb_dn *user_dn, *domain_dn;
 560         NTSTATUS nt_status;
 561         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 562         int ret;
 563
 564         if (!tmp_ctx) {
 565                 return NT_STATUS_NO_MEMORY;
 566         }
 567
 568         nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal, &user_dn, &domain_dn);
 569         if (!NT_STATUS_IS_OK(nt_status)) {
 570                 talloc_free(tmp_ctx);
 571                 return nt_status;
 572         }
 573
 574         /* grab domain info from the reference */
 575         ret = gendb_search(sam_ctx, tmp_ctx, NULL, msgs_domain_ref, domain_ref_attrs,
 576                            "(ncName=%s)", ldb_dn_linearize(tmp_ctx, domain_dn));
 577
 578         if (ret != 1) {
 579                 talloc_free(tmp_ctx);
 580                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 581         }
 582
 583         /* pull the user attributes */
 584         ret = gendb_search_dn(sam_ctx, tmp_ctx,
 585                               user_dn, msgs, user_attrs);
 586         if (ret != 1) {
 587                 talloc_free(tmp_ctx);
 588                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 589         }
 590         talloc_steal(mem_ctx, *msgs);
 591         talloc_steal(mem_ctx, *msgs_domain_ref);
 592         talloc_free(tmp_ctx);
 593
 594         return NT_STATUS_OK;
 595 }
 596
 597 /* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available */
 598 NTSTATUS sam_get_server_info_principal(TALLOC_CTX *mem_ctx, const char *principal,
 599                                        struct auth_serversupplied_info **server_info)
 600 {
 601         NTSTATUS nt_status;
 602         DATA_BLOB user_sess_key = data_blob(NULL, 0);
 603         DATA_BLOB lm_sess_key = data_blob(NULL, 0);
 604
 605         struct ldb_message **msgs;
 606         struct ldb_message **msgs_domain_ref;
 607         struct ldb_context *sam_ctx;
 608
 609         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 610         if (!tmp_ctx) {
 611                 return NT_STATUS_NO_MEMORY;
 612         }
 613
 614         sam_ctx = samdb_connect(tmp_ctx, system_session(tmp_ctx));
 615         if (sam_ctx == NULL) {
 616                 talloc_free(tmp_ctx);
 617                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 618         }
 619
 620         nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal,
 621                                               &msgs, &msgs_domain_ref);
 622         if (!NT_STATUS_IS_OK(nt_status)) {
 623                 return nt_status;
 624         }
 625
 626         nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, msgs[0], msgs_domain_ref[0],
 627                                              user_sess_key, lm_sess_key,
 628                                              server_info);
 629         if (NT_STATUS_IS_OK(nt_status)) {
 630                 talloc_steal(mem_ctx, *server_info);
 631         }
 632         talloc_free(tmp_ctx);
 633         return nt_status;
 634 }
 635
 636 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
 637                                                  TALLOC_CTX *mem_ctx,
 638                                                  const char *domain,
 639                                                  const struct auth_usersupplied_info *user_info,
 640                                                  struct auth_serversupplied_info **server_info)
 641 {
 642         NTSTATUS nt_status;
 643         const char *account_name = user_info->mapped.account_name;
 644         struct ldb_message **msgs;
 645         struct ldb_message **domain_ref_msgs;
 646         struct ldb_context *sam_ctx;
 647         DATA_BLOB user_sess_key, lm_sess_key;
 648         TALLOC_CTX *tmp_ctx;
 649
 650         if (!account_name || !*account_name) {
 651                 /* 'not for me' */
 652                 return NT_STATUS_NOT_IMPLEMENTED;
 653         }
 654
 655         tmp_ctx = talloc_new(mem_ctx);
 656         if (!tmp_ctx) {
 657                 return NT_STATUS_NO_MEMORY;
 658         }
 659
 660         sam_ctx = samdb_connect(tmp_ctx, system_session(mem_ctx));
 661         if (sam_ctx == NULL) {
 662                 talloc_free(tmp_ctx);
 663                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 664         }
 665
 666         nt_status = authsam_search_account(tmp_ctx, sam_ctx, account_name, domain, &msgs, &domain_ref_msgs);
 667         if (!NT_STATUS_IS_OK(nt_status)) {
 668                 talloc_free(tmp_ctx);
 669                 return nt_status;
 670         }
 671
 672         nt_status = authsam_authenticate(ctx->auth_ctx, tmp_ctx, sam_ctx, msgs, domain_ref_msgs, user_info,
 673                                          &user_sess_key, &lm_sess_key);
 674         if (!NT_STATUS_IS_OK(nt_status)) {
 675                 talloc_free(tmp_ctx);
 676                 return nt_status;
 677         }
 678
 679         nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, msgs[0], domain_ref_msgs[0],
 680                                              user_sess_key, lm_sess_key,
 681                                              server_info);
 682         if (!NT_STATUS_IS_OK(nt_status)) {
 683                 talloc_free(tmp_ctx);
 684                 return nt_status;
 685         }
 686
 687         talloc_steal(mem_ctx, *server_info);
 688         talloc_free(tmp_ctx);
 689
 690         return NT_STATUS_OK;
 691 }
 692
 693 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
 694                                                     TALLOC_CTX *mem_ctx,
 695                                                     const struct auth_usersupplied_info *user_info,
 696                                                     struct auth_serversupplied_info **server_info)
 697 {
 698         return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
 699 }
 700
 701 /****************************************************************************
 702 Check SAM security (above) but with a few extra checks.
 703 ****************************************************************************/
 704 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
 705                                        TALLOC_CTX *mem_ctx,
 706                                        const struct auth_usersupplied_info *user_info,
 707                                        struct auth_serversupplied_info **server_info)
 708 {
 709         const char *domain;
 710         BOOL is_local_name, is_my_domain;
 711
 712         is_local_name = is_myname(user_info->mapped.domain_name);
 713         is_my_domain  = strequal(user_info->mapped.domain_name, lp_workgroup());
 714
 715         /* check whether or not we service this domain/workgroup name */
 716         switch (lp_server_role()) {
 717                 case ROLE_STANDALONE:
 718                         domain = lp_netbios_name();
 719                         break;
 720                 case ROLE_DOMAIN_MEMBER:
 721                         if (!is_local_name) {
 722                                 DEBUG(6,("authsam_check_password: %s is not one of my local names (%s)\n",
 723                                         user_info->mapped.domain_name, (lp_server_role() == ROLE_DOMAIN_MEMBER
 724                                         ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
 725                                 return NT_STATUS_NOT_IMPLEMENTED;
 726                         }
 727                         domain = lp_netbios_name();
 728                         break;
 729                 case ROLE_DOMAIN_PDC:
 730                 case ROLE_DOMAIN_BDC:
 731                         if (!is_local_name && !is_my_domain) {
 732                                 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
 733                                         user_info->mapped.domain_name));
 734                                 return NT_STATUS_NOT_IMPLEMENTED;
 735                         }
 736                         domain = lp_workgroup();
 737                         break;
 738                 default:
 739                         DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
 740                         return NT_STATUS_NOT_IMPLEMENTED;
 741         }
 742
 743         return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
 744 }
 745
 746 static const struct auth_operations sam_ignoredomain_ops = {
 747         .name           = "sam_ignoredomain",
 748         .get_challenge  = auth_get_challenge_not_implemented,
 749         .check_password = authsam_ignoredomain_check_password
 750 };
 751
 752 static const struct auth_operations sam_ops = {
 753         .name           = "sam",
 754         .get_challenge  = auth_get_challenge_not_implemented,
 755         .check_password = authsam_check_password
 756 };
 757
 758 NTSTATUS auth_sam_init(void)
 759 {
 760         NTSTATUS ret;
 761
 762         ret = auth_register(&sam_ops);
 763         if (!NT_STATUS_IS_OK(ret)) {
 764                 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
 765                 return ret;
 766         }
 767
 768         ret = auth_register(&sam_ignoredomain_ops);
 769         if (!NT_STATUS_IS_OK(ret)) {
 770                 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));
 771                 return ret;
 772         }
 773
 774         return ret;
 775 }