source4/auth/ntlm/auth_sam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2009
   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 3 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, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/time.h"
  24 #include <ldb.h>
  25 #include "libcli/ldap/ldap_ndr.h"
  26 #include "libcli/security/security.h"
  27 #include "auth/auth.h"
  28 #include "../libcli/auth/ntlm_check.h"
  29 #include "auth/ntlm/auth_proto.h"
  30 #include "auth/auth_sam.h"
  31 #include "dsdb/samdb/samdb.h"
  32 #include "dsdb/common/util.h"
  33 #include "param/param.h"
  34 #include "librpc/gen_ndr/ndr_irpc_c.h"
  35 #include "lib/messaging/irpc.h"
  36 #include "libcli/auth/libcli_auth.h"
  37 #include "libds/common/roles.h"
  38
  39 NTSTATUS auth_sam_init(void);
  40
  41 extern const char *user_attrs[];
  42 extern const char *domain_ref_attrs[];
  43
  44 /****************************************************************************
  45  Look for the specified user in the sam, return ldb result structures
  46 ****************************************************************************/
  47
  48 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
  49                                        const char *account_name,
  50                                        struct ldb_dn *domain_dn,
  51                                        struct ldb_message **ret_msg)
  52 {
  53         int ret;
  54
  55         /* pull the user attributes */
  56         ret = dsdb_search_one(sam_ctx, mem_ctx, ret_msg, domain_dn, LDB_SCOPE_SUBTREE,
  57                               user_attrs,
  58                               DSDB_SEARCH_SHOW_EXTENDED_DN,
  59                               "(&(sAMAccountName=%s)(objectclass=user))",
  60                               ldb_binary_encode_string(mem_ctx, account_name));
  61         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
  62                 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb, under %s\n",
  63                          account_name, ldb_dn_get_linearized(domain_dn)));
  64                 return NT_STATUS_NO_SUCH_USER;
  65         }
  66         if (ret != LDB_SUCCESS) {
  67                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
  68         }
  69
  70         return NT_STATUS_OK;
  71 }
  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 auth4_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         switch (user_info->password_state) {
  89         case AUTH_PASSWORD_PLAIN:
  90         {
  91                 const struct auth_usersupplied_info *user_info_temp;
  92                 status = encrypt_user_info(mem_ctx, auth_context,
  93                                            AUTH_PASSWORD_HASH,
  94                                            user_info, &user_info_temp);
  95                 if (!NT_STATUS_IS_OK(status)) {
  96                         DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
  97                         return status;
  98                 }
  99                 user_info = user_info_temp;
 100
 101                 /*fall through*/
 102         }
 103         case AUTH_PASSWORD_HASH:
 104                 *lm_sess_key = data_blob(NULL, 0);
 105                 *user_sess_key = data_blob(NULL, 0);
 106                 status = hash_password_check(mem_ctx,
 107                                              lpcfg_lanman_auth(auth_context->lp_ctx),
 108                                              user_info->password.hash.lanman,
 109                                              user_info->password.hash.nt,
 110                                              user_info->mapped.account_name,
 111                                              lm_pwd, nt_pwd);
 112                 NT_STATUS_NOT_OK_RETURN(status);
 113                 break;
 114
 115         case AUTH_PASSWORD_RESPONSE:
 116                 status = ntlm_password_check(mem_ctx,
 117                                              lpcfg_lanman_auth(auth_context->lp_ctx),
 118                                                  lpcfg_ntlm_auth(auth_context->lp_ctx),
 119                                              user_info->logon_parameters,
 120                                              &auth_context->challenge.data,
 121                                              &user_info->password.response.lanman,
 122                                              &user_info->password.response.nt,
 123                                              user_info->mapped.account_name,
 124                                              user_info->client.account_name,
 125                                              user_info->client.domain_name,
 126                                              lm_pwd, nt_pwd,
 127                                              user_sess_key, lm_sess_key);
 128                 NT_STATUS_NOT_OK_RETURN(status);
 129                 break;
 130         }
 131
 132         return NT_STATUS_OK;
 133 }
 134
 135
 136 /*
 137   send a message to the drepl server telling it to initiate a
 138   REPL_SECRET getncchanges extended op to fetch the users secrets
 139  */
 140 static void auth_sam_trigger_repl_secret(struct auth4_context *auth_context,
 141                                          struct ldb_dn *user_dn)
 142 {
 143         struct dcerpc_binding_handle *irpc_handle;
 144         struct drepl_trigger_repl_secret r;
 145         struct tevent_req *req;
 146         TALLOC_CTX *tmp_ctx;
 147
 148         tmp_ctx = talloc_new(auth_context);
 149         if (tmp_ctx == NULL) {
 150                 return;
 151         }
 152
 153         irpc_handle = irpc_binding_handle_by_name(tmp_ctx, auth_context->msg_ctx,
 154                                                   "dreplsrv",
 155                                                   &ndr_table_irpc);
 156         if (irpc_handle == NULL) {
 157                 DEBUG(1,(__location__ ": Unable to get binding handle for dreplsrv\n"));
 158                 TALLOC_FREE(tmp_ctx);
 159                 return;
 160         }
 161
 162         r.in.user_dn = ldb_dn_get_linearized(user_dn);
 163
 164         /*
 165          * This seem to rely on the current IRPC implementation,
 166          * which delivers the message in the _send function.
 167          *
 168          * TODO: we need a ONE_WAY IRPC handle and register
 169          * a callback and wait for it to be triggered!
 170          */
 171         req = dcerpc_drepl_trigger_repl_secret_r_send(tmp_ctx,
 172                                                       auth_context->event_ctx,
 173                                                       irpc_handle,
 174                                                       &r);
 175
 176         /* we aren't interested in a reply */
 177         talloc_free(req);
 178         TALLOC_FREE(tmp_ctx);
 179 }
 180
 181
 182 /*
 183  * Check that a password is OK, and update badPwdCount if required.
 184  */
 185
 186 static NTSTATUS authsam_password_check_and_record(struct auth4_context *auth_context,
 187                                                   TALLOC_CTX *mem_ctx,
 188                                                   struct ldb_dn *domain_dn,
 189                                                   struct ldb_message *msg,
 190                                                   uint16_t acct_flags,
 191                                                   const struct auth_usersupplied_info *user_info,
 192                                                   DATA_BLOB *user_sess_key,
 193                                                   DATA_BLOB *lm_sess_key)
 194 {
 195         NTSTATUS nt_status;
 196         NTSTATUS auth_status;
 197         TALLOC_CTX *tmp_ctx;
 198         int i, ret;
 199         int history_len = 0;
 200         struct ldb_context *sam_ctx = auth_context->sam_ctx;
 201         const char * const attrs[] = { "pwdHistoryLength", NULL };
 202         struct ldb_message *dom_msg;
 203         struct samr_Password *lm_pwd;
 204         struct samr_Password *nt_pwd;
 205
 206         tmp_ctx = talloc_new(mem_ctx);
 207         if (tmp_ctx == NULL) {
 208                 return NT_STATUS_NO_MEMORY;
 209         }
 210
 211         /*
 212          * This call does more than what it appears to do, it also
 213          * checks for the account lockout.
 214          *
 215          * It is done here so that all parts of Samba that read the
 216          * password refuse to even operate on it if the account is
 217          * locked out, to avoid mistakes like CVE-2013-4496.
 218          */
 219         nt_status = samdb_result_passwords(tmp_ctx, auth_context->lp_ctx,
 220                                            msg, &lm_pwd, &nt_pwd);
 221         if (!NT_STATUS_IS_OK(nt_status)) {
 222                 TALLOC_FREE(tmp_ctx);
 223                 return nt_status;
 224         }
 225
 226         if (lm_pwd == NULL && nt_pwd == NULL) {
 227                 bool am_rodc;
 228                 if (samdb_rodc(auth_context->sam_ctx, &am_rodc) == LDB_SUCCESS && am_rodc) {
 229                         /*
 230                          * we don't have passwords for this
 231                          * account. We are an RODC, and this account
 232                          * may be one for which we either are denied
 233                          * REPL_SECRET replication or we haven't yet
 234                          * done the replication. We return
 235                          * NT_STATUS_NOT_IMPLEMENTED which tells the
 236                          * auth code to try the next authentication
 237                          * mechanism. We also send a message to our
 238                          * drepl server to tell it to try and
 239                          * replicate the secrets for this account.
 240                          */
 241                         auth_sam_trigger_repl_secret(auth_context, msg->dn);
 242                         TALLOC_FREE(tmp_ctx);
 243                         return NT_STATUS_NOT_IMPLEMENTED;
 244                 }
 245         }
 246
 247         auth_status = authsam_password_ok(auth_context, tmp_ctx,
 248                                           acct_flags,
 249                                           lm_pwd, nt_pwd,
 250                                           user_info,
 251                                           user_sess_key, lm_sess_key);
 252         if (NT_STATUS_IS_OK(auth_status)) {
 253                 if (user_sess_key->data) {
 254                         talloc_steal(mem_ctx, user_sess_key->data);
 255                 }
 256                 if (lm_sess_key->data) {
 257                         talloc_steal(mem_ctx, lm_sess_key->data);
 258                 }
 259                 TALLOC_FREE(tmp_ctx);
 260                 return NT_STATUS_OK;
 261         }
 262         *user_sess_key = data_blob_null;
 263         *lm_sess_key = data_blob_null;
 264
 265         if (!NT_STATUS_EQUAL(auth_status, NT_STATUS_WRONG_PASSWORD)) {
 266                 TALLOC_FREE(tmp_ctx);
 267                 return auth_status;
 268         }
 269
 270         /*
 271          * We only continue if this was a wrong password
 272          * and we'll always return NT_STATUS_WRONG_PASSWORD
 273          * no matter what error happens.
 274          */
 275
 276         /* pull the domain password property attributes */
 277         ret = dsdb_search_one(sam_ctx, tmp_ctx, &dom_msg, domain_dn, LDB_SCOPE_BASE,
 278                               attrs, 0, "objectClass=domain");
 279         if (ret == LDB_SUCCESS) {
 280                 history_len = ldb_msg_find_attr_as_uint(dom_msg, "pwdHistoryLength", 0);
 281         } else if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 282                 DEBUG(3,("Couldn't find domain %s: %s!\n",
 283                          ldb_dn_get_linearized(domain_dn),
 284                          ldb_errstring(sam_ctx)));
 285         } else {
 286                 DEBUG(3,("error finding domain %s: %s!\n",
 287                          ldb_dn_get_linearized(domain_dn),
 288                          ldb_errstring(sam_ctx)));
 289         }
 290
 291         for (i = 1; i < MIN(history_len, 3); i++) {
 292                 static const struct samr_Password zero_hash;
 293                 struct samr_Password zero_string_hash;
 294                 struct samr_Password zero_string_des_hash;
 295                 struct samr_Password *nt_history_pwd = NULL;
 296                 struct samr_Password *lm_history_pwd = NULL;
 297                 NTTIME pwdLastSet;
 298                 struct timeval tv_now;
 299                 NTTIME now;
 300                 int allowed_period_mins;
 301                 NTTIME allowed_period;
 302
 303                 nt_status = samdb_result_passwords_from_history(tmp_ctx,
 304                                                         auth_context->lp_ctx,
 305                                                         msg, i,
 306                                                         &lm_history_pwd,
 307                                                         &nt_history_pwd);
 308                 if (!NT_STATUS_IS_OK(nt_status)) {
 309                         /*
 310                          * If we don't find element 'i' we won't find
 311                          * 'i+1' ...
 312                          */
 313                         break;
 314                 }
 315
 316                 /*
 317                  * We choose to avoid any issues
 318                  * around different LM and NT history
 319                  * lengths by only checking the NT
 320                  * history
 321                  */
 322                 if (nt_history_pwd == NULL) {
 323                         /*
 324                          * If we don't find element 'i' we won't find
 325                          * 'i+1' ...
 326                          */
 327                         break;
 328                 }
 329
 330                 /* Skip over all-zero hashes in the history */
 331                 if (memcmp(nt_history_pwd->hash, zero_hash.hash,
 332                            sizeof(zero_hash.hash)) == 0) {
 333                         continue;
 334                 }
 335
 336                 /*
 337                  * This looks odd, but the password_hash module writes this in if
 338                  * (somehow) we didn't have an old NT hash
 339                  */
 340
 341                 E_md4hash("", zero_string_hash.hash);
 342                 if (memcmp(nt_history_pwd->hash, zero_string_hash.hash, 16) == 0) {
 343                         continue;
 344                 }
 345
 346                 E_deshash("", zero_string_des_hash.hash);
 347                 if (!lm_history_pwd || memcmp(lm_history_pwd->hash, zero_string_des_hash.hash, 16) == 0) {
 348                         lm_history_pwd = NULL;
 349                 }
 350
 351                 auth_status = authsam_password_ok(auth_context, tmp_ctx,
 352                                                   acct_flags,
 353                                                   lm_history_pwd,
 354                                                   nt_history_pwd,
 355                                                   user_info,
 356                                                   user_sess_key,
 357                                                   lm_sess_key);
 358                 if (!NT_STATUS_IS_OK(auth_status)) {
 359                         /*
 360                          * If this was not a correct password, try the next
 361                          * one from the history
 362                          */
 363                         *user_sess_key = data_blob_null;
 364                         *lm_sess_key = data_blob_null;
 365                         continue;
 366                 }
 367
 368                 if (i != 1) {
 369                         /*
 370                          * The authentication was OK, but not against
 371                          * the previous password, which is stored at index 1.
 372                          *
 373                          * We just return the original wrong password.
 374                          * This skips the update of the bad pwd count,
 375                          * because this is almost certainly user error
 376                          * (or automatic login on a computer using a cached
 377                          * password from before the password change),
 378                          * not an attack.
 379                          */
 380                         TALLOC_FREE(tmp_ctx);
 381                         return NT_STATUS_WRONG_PASSWORD;
 382                 }
 383
 384                 if (user_info->password_state != AUTH_PASSWORD_RESPONSE) {
 385                         /*
 386                          * The authentication was OK against the previous password,
 387                          * but it's not a NTLM network authentication.
 388                          *
 389                          * We just return the original wrong password.
 390                          * This skips the update of the bad pwd count,
 391                          * because this is almost certainly user error
 392                          * (or automatic login on a computer using a cached
 393                          * password from before the password change),
 394                          * not an attack.
 395                          */
 396                         TALLOC_FREE(tmp_ctx);
 397                         return NT_STATUS_WRONG_PASSWORD;
 398                 }
 399
 400                 /*
 401                  * If the password was OK, it's a NTLM network authentication
 402                  * and it was the previous password.
 403                  *
 404                  * Now we see if it is within the grace period,
 405                  * so that we don't break cached sessions on other computers
 406                  * before the user can lock and unlock their other screens
 407                  * (resetting their cached password).
 408                  *
 409                  * See http://support.microsoft.com/kb/906305
 410                  * OldPasswordAllowedPeriod ("old password allowed period")
 411                  * is specified in minutes. The default is 60.
 412                  */
 413                 allowed_period_mins = lpcfg_old_password_allowed_period(auth_context->lp_ctx);
 414                 /*
 415                  * NTTIME uses 100ns units
 416                  */
 417                 allowed_period = allowed_period_mins * 60 * 1000*1000*10;
 418                 pwdLastSet = samdb_result_nttime(msg, "pwdLastSet", 0);
 419                 tv_now = timeval_current();
 420                 now = timeval_to_nttime(&tv_now);
 421
 422                 if (now < pwdLastSet) {
 423                         /*
 424                          * time jump?
 425                          *
 426                          * We just return the original wrong password.
 427                          * This skips the update of the bad pwd count,
 428                          * because this is almost certainly user error
 429                          * (or automatic login on a computer using a cached
 430                          * password from before the password change),
 431                          * not an attack.
 432                          */
 433                         TALLOC_FREE(tmp_ctx);
 434                         return NT_STATUS_WRONG_PASSWORD;
 435                 }
 436
 437                 if ((now - pwdLastSet) >= allowed_period) {
 438                         /*
 439                          * The allowed period is over.
 440                          *
 441                          * We just return the original wrong password.
 442                          * This skips the update of the bad pwd count,
 443                          * because this is almost certainly user error
 444                          * (or automatic login on a computer using a cached
 445                          * password from before the password change),
 446                          * not an attack.
 447                          */
 448                         TALLOC_FREE(tmp_ctx);
 449                         return NT_STATUS_WRONG_PASSWORD;
 450                 }
 451
 452                 /*
 453                  * We finally allow the authentication with the
 454                  * previous password within the allowed period.
 455                  */
 456                 if (user_sess_key->data) {
 457                         talloc_steal(mem_ctx, user_sess_key->data);
 458                 }
 459                 if (lm_sess_key->data) {
 460                         talloc_steal(mem_ctx, lm_sess_key->data);
 461                 }
 462
 463                 TALLOC_FREE(tmp_ctx);
 464                 return auth_status;
 465         }
 466
 467         /*
 468          * If we are not in the allowed period or match an old password,
 469          * we didn't return early. Now update the badPwdCount et al.
 470          */
 471         nt_status = authsam_update_bad_pwd_count(auth_context->sam_ctx,
 472                                                  msg, domain_dn);
 473         if (!NT_STATUS_IS_OK(nt_status)) {
 474                 /*
 475                  * We need to return the original
 476                  * NT_STATUS_WRONG_PASSWORD error, so there isn't
 477                  * anything more we can do than write something into
 478                  * the log
 479                  */
 480                 DEBUG(0, ("Failed to note bad password for user [%s]: %s\n",
 481                           user_info->mapped.account_name,
 482                           nt_errstr(nt_status)));
 483         }
 484
 485         TALLOC_FREE(tmp_ctx);
 486         return NT_STATUS_WRONG_PASSWORD;
 487 }
 488
 489 static NTSTATUS authsam_authenticate(struct auth4_context *auth_context,
 490                                      TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
 491                                      struct ldb_dn *domain_dn,
 492                                      struct ldb_message *msg,
 493                                      const struct auth_usersupplied_info *user_info,
 494                                      DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
 495 {
 496         NTSTATUS nt_status;
 497         bool interactive = (user_info->password_state == AUTH_PASSWORD_HASH);
 498         uint16_t acct_flags = samdb_result_acct_flags(msg, NULL);
 499         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 500         if (!tmp_ctx) {
 501                 return NT_STATUS_NO_MEMORY;
 502         }
 503
 504         /* You can only do an interactive login to normal accounts */
 505         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 506                 if (!(acct_flags & ACB_NORMAL)) {
 507                         TALLOC_FREE(tmp_ctx);
 508                         return NT_STATUS_NO_SUCH_USER;
 509                 }
 510         }
 511
 512         nt_status = authsam_password_check_and_record(auth_context, tmp_ctx,
 513                                                       domain_dn, msg, acct_flags,
 514                                                       user_info,
 515                                                       user_sess_key, lm_sess_key);
 516         if (!NT_STATUS_IS_OK(nt_status)) {
 517                 TALLOC_FREE(tmp_ctx);
 518                 return nt_status;
 519         }
 520
 521         nt_status = authsam_account_ok(tmp_ctx, auth_context->sam_ctx,
 522                                        user_info->logon_parameters,
 523                                        domain_dn,
 524                                        msg,
 525                                        user_info->workstation_name,
 526                                        user_info->mapped.account_name,
 527                                        false, false);
 528         if (!NT_STATUS_IS_OK(nt_status)) {
 529                 TALLOC_FREE(tmp_ctx);
 530                 return nt_status;
 531         }
 532
 533         nt_status = authsam_logon_success_accounting(auth_context->sam_ctx,
 534                                                      msg, domain_dn,
 535                                                      interactive);
 536         if (!NT_STATUS_IS_OK(nt_status)) {
 537                 TALLOC_FREE(tmp_ctx);
 538                 return nt_status;
 539         }
 540
 541         if (user_sess_key && user_sess_key->data) {
 542                 talloc_steal(mem_ctx, user_sess_key->data);
 543         }
 544         if (lm_sess_key && lm_sess_key->data) {
 545                 talloc_steal(mem_ctx, lm_sess_key->data);
 546         }
 547
 548         TALLOC_FREE(tmp_ctx);
 549         return nt_status;
 550 }
 551
 552
 553
 554 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
 555                                                  TALLOC_CTX *mem_ctx,
 556                                                  const struct auth_usersupplied_info *user_info,
 557                                                  struct auth_user_info_dc **user_info_dc)
 558 {
 559         NTSTATUS nt_status;
 560         const char *account_name = user_info->mapped.account_name;
 561         struct ldb_message *msg;
 562         struct ldb_dn *domain_dn;
 563         DATA_BLOB user_sess_key, lm_sess_key;
 564         TALLOC_CTX *tmp_ctx;
 565
 566         if (ctx->auth_ctx->sam_ctx == NULL) {
 567                 DEBUG(0, ("No SAM available, cannot log in users\n"));
 568                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
 569         }
 570
 571         if (!account_name || !*account_name) {
 572                 /* 'not for me' */
 573                 return NT_STATUS_NOT_IMPLEMENTED;
 574         }
 575
 576         tmp_ctx = talloc_new(mem_ctx);
 577         if (!tmp_ctx) {
 578                 return NT_STATUS_NO_MEMORY;
 579         }
 580
 581         domain_dn = ldb_get_default_basedn(ctx->auth_ctx->sam_ctx);
 582         if (domain_dn == NULL) {
 583                 talloc_free(tmp_ctx);
 584                 return NT_STATUS_NO_SUCH_DOMAIN;
 585         }
 586
 587         nt_status = authsam_search_account(tmp_ctx, ctx->auth_ctx->sam_ctx, account_name, domain_dn, &msg);
 588         if (!NT_STATUS_IS_OK(nt_status)) {
 589                 talloc_free(tmp_ctx);
 590                 return nt_status;
 591         }
 592
 593         nt_status = authsam_authenticate(ctx->auth_ctx, tmp_ctx, ctx->auth_ctx->sam_ctx, domain_dn, msg, user_info,
 594                                          &user_sess_key, &lm_sess_key);
 595         if (!NT_STATUS_IS_OK(nt_status)) {
 596                 talloc_free(tmp_ctx);
 597                 return nt_status;
 598         }
 599
 600         nt_status = authsam_make_user_info_dc(tmp_ctx, ctx->auth_ctx->sam_ctx, lpcfg_netbios_name(ctx->auth_ctx->lp_ctx),
 601                                              lpcfg_sam_name(ctx->auth_ctx->lp_ctx),
 602                                              domain_dn,
 603                                              msg,
 604                                              user_sess_key, lm_sess_key,
 605                                              user_info_dc);
 606         if (!NT_STATUS_IS_OK(nt_status)) {
 607                 talloc_free(tmp_ctx);
 608                 return nt_status;
 609         }
 610
 611         talloc_steal(mem_ctx, *user_info_dc);
 612         talloc_free(tmp_ctx);
 613
 614         return NT_STATUS_OK;
 615 }
 616
 617 static NTSTATUS authsam_ignoredomain_want_check(struct auth_method_context *ctx,
 618                                                 TALLOC_CTX *mem_ctx,
 619                                                 const struct auth_usersupplied_info *user_info)
 620 {
 621         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
 622                 return NT_STATUS_NOT_IMPLEMENTED;
 623         }
 624
 625         return NT_STATUS_OK;
 626 }
 627
 628 /****************************************************************************
 629 Check SAM security (above) but with a few extra checks.
 630 ****************************************************************************/
 631 static NTSTATUS authsam_want_check(struct auth_method_context *ctx,
 632                                    TALLOC_CTX *mem_ctx,
 633                                    const struct auth_usersupplied_info *user_info)
 634 {
 635         bool is_local_name, is_my_domain;
 636
 637         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
 638                 return NT_STATUS_NOT_IMPLEMENTED;
 639         }
 640
 641         is_local_name = lpcfg_is_myname(ctx->auth_ctx->lp_ctx,
 642                                   user_info->mapped.domain_name);
 643         is_my_domain  = lpcfg_is_mydomain(ctx->auth_ctx->lp_ctx,
 644                                        user_info->mapped.domain_name);
 645
 646         /* check whether or not we service this domain/workgroup name */
 647         switch (lpcfg_server_role(ctx->auth_ctx->lp_ctx)) {
 648                 case ROLE_STANDALONE:
 649                         return NT_STATUS_OK;
 650
 651                 case ROLE_DOMAIN_MEMBER:
 652                         if (!is_local_name) {
 653                                 DEBUG(6,("authsam_check_password: %s is not one of my local names (DOMAIN_MEMBER)\n",
 654                                         user_info->mapped.domain_name));
 655                                 return NT_STATUS_NOT_IMPLEMENTED;
 656                         }
 657                         return NT_STATUS_OK;
 658
 659                 case ROLE_ACTIVE_DIRECTORY_DC:
 660                         if (!is_local_name && !is_my_domain) {
 661                                 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
 662                                         user_info->mapped.domain_name));
 663                                 return NT_STATUS_NOT_IMPLEMENTED;
 664                         }
 665                         return NT_STATUS_OK;
 666         }
 667
 668         DEBUG(6,("authsam_check_password: lpcfg_server_role() has an undefined value\n"));
 669         return NT_STATUS_NOT_IMPLEMENTED;
 670 }
 671
 672
 673 /* Wrapper for the auth subsystem pointer */
 674 static NTSTATUS authsam_get_user_info_dc_principal_wrapper(TALLOC_CTX *mem_ctx,
 675                                                           struct auth4_context *auth_context,
 676                                                           const char *principal,
 677                                                           struct ldb_dn *user_dn,
 678                                                           struct auth_user_info_dc **user_info_dc)
 679 {
 680         return authsam_get_user_info_dc_principal(mem_ctx, auth_context->lp_ctx, auth_context->sam_ctx,
 681                                                  principal, user_dn, user_info_dc);
 682 }
 683 static const struct auth_operations sam_ignoredomain_ops = {
 684         .name                      = "sam_ignoredomain",
 685         .want_check                = authsam_ignoredomain_want_check,
 686         .check_password            = authsam_check_password_internals,
 687         .get_user_info_dc_principal = authsam_get_user_info_dc_principal_wrapper,
 688         .flags                     = AUTH_METHOD_LOCAL_SAM
 689 };
 690
 691 static const struct auth_operations sam_ops = {
 692         .name                      = "sam",
 693         .want_check                = authsam_want_check,
 694         .check_password            = authsam_check_password_internals,
 695         .get_user_info_dc_principal = authsam_get_user_info_dc_principal_wrapper,
 696         .flags                     = AUTH_METHOD_LOCAL_SAM
 697 };
 698
 699 _PUBLIC_ NTSTATUS auth4_sam_init(void);
 700 _PUBLIC_ NTSTATUS auth4_sam_init(void)
 701 {
 702         NTSTATUS ret;
 703
 704         ret = auth_register(&sam_ops);
 705         if (!NT_STATUS_IS_OK(ret)) {
 706                 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
 707                 return ret;
 708         }
 709
 710         ret = auth_register(&sam_ignoredomain_ops);
 711         if (!NT_STATUS_IS_OK(ret)) {
 712                 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));
 713                 return ret;
 714         }
 715
 716         return ret;
 717 }