source/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8    Copyright (C) Volker Lendecke 2006
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 /****************************************************************************
  30  Ensure primary group SID is always at position 0 in a
  31  auth_serversupplied_info struct.
  32 ****************************************************************************/
  33
  34 static void sort_sid_array_for_smbd(auth_serversupplied_info *result,
  35                                 const DOM_SID *pgroup_sid)
  36 {
  37         unsigned int i;
  38
  39         if (!result->sids) {
  40                 return;
  41         }
  42
  43         if (sid_compare(&result->sids[0], pgroup_sid)==0) {
  44                 return;
  45         }
  46
  47         for (i = 1; i < result->num_sids; i++) {
  48                 if (sid_compare(pgroup_sid,
  49                                 &result->sids[i]) == 0) {
  50                         sid_copy(&result->sids[i], &result->sids[0]);
  51                         sid_copy(&result->sids[0], pgroup_sid);
  52                         return;
  53                 }
  54         }
  55 }
  56
  57 /****************************************************************************
  58  Create a UNIX user on demand.
  59 ****************************************************************************/
  60
  61 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  62 {
  63         TALLOC_CTX *ctx = talloc_tos();
  64         char *add_script;
  65         int ret;
  66
  67         add_script = talloc_strdup(ctx, lp_adduser_script());
  68         if (!add_script || !*add_script) {
  69                 return -1;
  70         }
  71         add_script = talloc_all_string_sub(ctx,
  72                                 add_script,
  73                                 "%u",
  74                                 unix_username);
  75         if (!add_script) {
  76                 return -1;
  77         }
  78         if (domain) {
  79                 add_script = talloc_all_string_sub(ctx,
  80                                         add_script,
  81                                         "%D",
  82                                         domain);
  83                 if (!add_script) {
  84                         return -1;
  85                 }
  86         }
  87         if (homedir) {
  88                 add_script = talloc_all_string_sub(ctx,
  89                                 add_script,
  90                                 "%H",
  91                                 homedir);
  92                 if (!add_script) {
  93                         return -1;
  94                 }
  95         }
  96         ret = smbrun(add_script,NULL);
  97         flush_pwnam_cache();
  98         DEBUG(ret ? 0 : 3,
  99                 ("smb_create_user: Running the command `%s' gave %d\n",
 100                  add_script,ret));
 101         return ret;
 102 }
 103
 104 /****************************************************************************
 105  Create an auth_usersupplied_data structure
 106 ****************************************************************************/
 107
 108 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
 109                                const char *smb_name,
 110                                const char *internal_username,
 111                                const char *client_domain,
 112                                const char *domain,
 113                                const char *wksta_name,
 114                                DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
 115                                DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
 116                                DATA_BLOB *plaintext,
 117                                bool encrypted)
 118 {
 119
 120         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
 121
 122         *user_info = SMB_MALLOC_P(auth_usersupplied_info);
 123         if (*user_info == NULL) {
 124                 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
 125                 return NT_STATUS_NO_MEMORY;
 126         }
 127
 128         ZERO_STRUCTP(*user_info);
 129
 130         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 131
 132         (*user_info)->smb_name = SMB_STRDUP(smb_name);
 133         if ((*user_info)->smb_name == NULL) {
 134                 free_user_info(user_info);
 135                 return NT_STATUS_NO_MEMORY;
 136         }
 137
 138         (*user_info)->internal_username = SMB_STRDUP(internal_username);
 139         if ((*user_info)->internal_username == NULL) {
 140                 free_user_info(user_info);
 141                 return NT_STATUS_NO_MEMORY;
 142         }
 143
 144         (*user_info)->domain = SMB_STRDUP(domain);
 145         if ((*user_info)->domain == NULL) {
 146                 free_user_info(user_info);
 147                 return NT_STATUS_NO_MEMORY;
 148         }
 149
 150         (*user_info)->client_domain = SMB_STRDUP(client_domain);
 151         if ((*user_info)->client_domain == NULL) {
 152                 free_user_info(user_info);
 153                 return NT_STATUS_NO_MEMORY;
 154         }
 155
 156         (*user_info)->wksta_name = SMB_STRDUP(wksta_name);
 157         if ((*user_info)->wksta_name == NULL) {
 158                 free_user_info(user_info);
 159                 return NT_STATUS_NO_MEMORY;
 160         }
 161
 162         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 163
 164         if (lm_pwd)
 165                 (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
 166         if (nt_pwd)
 167                 (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
 168         if (lm_interactive_pwd)
 169                 (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
 170         if (nt_interactive_pwd)
 171                 (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
 172
 173         if (plaintext)
 174                 (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
 175
 176         (*user_info)->encrypted = encrypted;
 177
 178         (*user_info)->logon_parameters = 0;
 179
 180         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 181
 182         return NT_STATUS_OK;
 183 }
 184
 185 /****************************************************************************
 186  Create an auth_usersupplied_data structure after appropriate mapping.
 187 ****************************************************************************/
 188
 189 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 190                             const char *smb_name,
 191                             const char *client_domain,
 192                             const char *wksta_name,
 193                             DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
 194                             DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
 195                             DATA_BLOB *plaintext,
 196                             bool encrypted)
 197 {
 198         const char *domain;
 199         NTSTATUS result;
 200         bool was_mapped;
 201         fstring internal_username;
 202         fstrcpy(internal_username, smb_name);
 203         was_mapped = map_username(internal_username);
 204
 205         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 206               client_domain, smb_name, wksta_name));
 207
 208         /* don't allow "" as a domain, fixes a Win9X bug
 209            where it doens't supply a domain for logon script
 210            'net use' commands.                                 */
 211
 212         if ( *client_domain )
 213                 domain = client_domain;
 214         else
 215                 domain = lp_workgroup();
 216
 217         /* do what win2k does.  Always map unknown domains to our own
 218            and let the "passdb backend" handle unknown users. */
 219
 220         if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
 221                 domain = my_sam_name();
 222
 223         /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
 224
 225         result = make_user_info(user_info, smb_name, internal_username,
 226                               client_domain, domain, wksta_name,
 227                               lm_pwd, nt_pwd,
 228                               lm_interactive_pwd, nt_interactive_pwd,
 229                               plaintext, encrypted);
 230         if (NT_STATUS_IS_OK(result)) {
 231                 (*user_info)->was_mapped = was_mapped;
 232         }
 233         return result;
 234 }
 235
 236 /****************************************************************************
 237  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 238  Decrypt and encrypt the passwords.
 239 ****************************************************************************/
 240
 241 bool make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 242                                      const char *smb_name,
 243                                      const char *client_domain,
 244                                      const char *wksta_name,
 245                                      uint32 logon_parameters,
 246                                      const uchar *lm_network_pwd,
 247                                      int lm_pwd_len,
 248                                      const uchar *nt_network_pwd,
 249                                      int nt_pwd_len)
 250 {
 251         bool ret;
 252         NTSTATUS status;
 253         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 254         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 255
 256         status = make_user_info_map(user_info,
 257                                     smb_name, client_domain,
 258                                     wksta_name,
 259                                     lm_pwd_len ? &lm_blob : NULL,
 260                                     nt_pwd_len ? &nt_blob : NULL,
 261                                     NULL, NULL, NULL,
 262                                     True);
 263
 264         if (NT_STATUS_IS_OK(status)) {
 265                 (*user_info)->logon_parameters = logon_parameters;
 266         }
 267         ret = NT_STATUS_IS_OK(status) ? True : False;
 268
 269         data_blob_free(&lm_blob);
 270         data_blob_free(&nt_blob);
 271         return ret;
 272 }
 273
 274 /****************************************************************************
 275  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 276  Decrypt and encrypt the passwords.
 277 ****************************************************************************/
 278
 279 bool make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 280                                          const char *smb_name,
 281                                          const char *client_domain,
 282                                          const char *wksta_name,
 283                                          uint32 logon_parameters,
 284                                          const uchar chal[8],
 285                                          const uchar lm_interactive_pwd[16],
 286                                          const uchar nt_interactive_pwd[16],
 287                                          const uchar *dc_sess_key)
 288 {
 289         unsigned char lm_pwd[16];
 290         unsigned char nt_pwd[16];
 291         unsigned char local_lm_response[24];
 292         unsigned char local_nt_response[24];
 293         unsigned char key[16];
 294
 295         ZERO_STRUCT(key);
 296         memcpy(key, dc_sess_key, 8);
 297
 298         if (lm_interactive_pwd)
 299                 memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 300
 301         if (nt_interactive_pwd)
 302                 memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 303
 304 #ifdef DEBUG_PASSWORD
 305         DEBUG(100,("key:"));
 306         dump_data(100, key, sizeof(key));
 307
 308         DEBUG(100,("lm owf password:"));
 309         dump_data(100, lm_pwd, sizeof(lm_pwd));
 310
 311         DEBUG(100,("nt owf password:"));
 312         dump_data(100, nt_pwd, sizeof(nt_pwd));
 313 #endif
 314
 315         if (lm_interactive_pwd)
 316                 SamOEMhash(lm_pwd, key, sizeof(lm_pwd));
 317
 318         if (nt_interactive_pwd)
 319                 SamOEMhash(nt_pwd, key, sizeof(nt_pwd));
 320
 321 #ifdef DEBUG_PASSWORD
 322         DEBUG(100,("decrypt of lm owf password:"));
 323         dump_data(100, lm_pwd, sizeof(lm_pwd));
 324
 325         DEBUG(100,("decrypt of nt owf password:"));
 326         dump_data(100, nt_pwd, sizeof(nt_pwd));
 327 #endif
 328
 329         if (lm_interactive_pwd)
 330                 SMBOWFencrypt(lm_pwd, chal,
 331                               local_lm_response);
 332
 333         if (nt_interactive_pwd)
 334                 SMBOWFencrypt(nt_pwd, chal,
 335                               local_nt_response);
 336
 337         /* Password info paranoia */
 338         ZERO_STRUCT(key);
 339
 340         {
 341                 bool ret;
 342                 NTSTATUS nt_status;
 343                 DATA_BLOB local_lm_blob;
 344                 DATA_BLOB local_nt_blob;
 345
 346                 DATA_BLOB lm_interactive_blob;
 347                 DATA_BLOB nt_interactive_blob;
 348
 349                 if (lm_interactive_pwd) {
 350                         local_lm_blob = data_blob(local_lm_response,
 351                                                   sizeof(local_lm_response));
 352                         lm_interactive_blob = data_blob(lm_pwd,
 353                                                         sizeof(lm_pwd));
 354                         ZERO_STRUCT(lm_pwd);
 355                 }
 356
 357                 if (nt_interactive_pwd) {
 358                         local_nt_blob = data_blob(local_nt_response,
 359                                                   sizeof(local_nt_response));
 360                         nt_interactive_blob = data_blob(nt_pwd,
 361                                                         sizeof(nt_pwd));
 362                         ZERO_STRUCT(nt_pwd);
 363                 }
 364
 365                 nt_status = make_user_info_map(
 366                         user_info,
 367                         smb_name, client_domain, wksta_name,
 368                         lm_interactive_pwd ? &local_lm_blob : NULL,
 369                         nt_interactive_pwd ? &local_nt_blob : NULL,
 370                         lm_interactive_pwd ? &lm_interactive_blob : NULL,
 371                         nt_interactive_pwd ? &nt_interactive_blob : NULL,
 372                         NULL, True);
 373
 374                 if (NT_STATUS_IS_OK(nt_status)) {
 375                         (*user_info)->logon_parameters = logon_parameters;
 376                 }
 377
 378                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 379                 data_blob_free(&local_lm_blob);
 380                 data_blob_free(&local_nt_blob);
 381                 data_blob_free(&lm_interactive_blob);
 382                 data_blob_free(&nt_interactive_blob);
 383                 return ret;
 384         }
 385 }
 386
 387
 388 /****************************************************************************
 389  Create an auth_usersupplied_data structure
 390 ****************************************************************************/
 391
 392 bool make_user_info_for_reply(auth_usersupplied_info **user_info,
 393                               const char *smb_name,
 394                               const char *client_domain,
 395                               const uint8 chal[8],
 396                               DATA_BLOB plaintext_password)
 397 {
 398
 399         DATA_BLOB local_lm_blob;
 400         DATA_BLOB local_nt_blob;
 401         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 402
 403         /*
 404          * Not encrypted - do so.
 405          */
 406
 407         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
 408                  "format.\n"));
 409
 410         if (plaintext_password.data) {
 411                 unsigned char local_lm_response[24];
 412
 413 #ifdef DEBUG_PASSWORD
 414                 DEBUG(10,("Unencrypted password (len %d):\n",
 415                           (int)plaintext_password.length));
 416                 dump_data(100, plaintext_password.data,
 417                           plaintext_password.length);
 418 #endif
 419
 420                 SMBencrypt( (const char *)plaintext_password.data,
 421                             (const uchar*)chal, local_lm_response);
 422                 local_lm_blob = data_blob(local_lm_response, 24);
 423
 424                 /* We can't do an NT hash here, as the password needs to be
 425                    case insensitive */
 426                 local_nt_blob = data_blob_null;
 427
 428         } else {
 429                 local_lm_blob = data_blob_null;
 430                 local_nt_blob = data_blob_null;
 431         }
 432
 433         ret = make_user_info_map(
 434                 user_info, smb_name, client_domain,
 435                 get_remote_machine_name(),
 436                 local_lm_blob.data ? &local_lm_blob : NULL,
 437                 local_nt_blob.data ? &local_nt_blob : NULL,
 438                 NULL, NULL,
 439                 plaintext_password.data ? &plaintext_password : NULL,
 440                 False);
 441
 442         data_blob_free(&local_lm_blob);
 443         return NT_STATUS_IS_OK(ret) ? True : False;
 444 }
 445
 446 /****************************************************************************
 447  Create an auth_usersupplied_data structure
 448 ****************************************************************************/
 449
 450 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 451                                       const char *smb_name,
 452                                       const char *client_domain,
 453                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 454 {
 455         return make_user_info_map(user_info, smb_name,
 456                                   client_domain,
 457                                   get_remote_machine_name(),
 458                                   lm_resp.data ? &lm_resp : NULL,
 459                                   nt_resp.data ? &nt_resp : NULL,
 460                                   NULL, NULL, NULL,
 461                                   True);
 462 }
 463
 464 /****************************************************************************
 465  Create a guest user_info blob, for anonymous authenticaion.
 466 ****************************************************************************/
 467
 468 bool make_user_info_guest(auth_usersupplied_info **user_info)
 469 {
 470         NTSTATUS nt_status;
 471
 472         nt_status = make_user_info(user_info,
 473                                    "","",
 474                                    "","",
 475                                    "",
 476                                    NULL, NULL,
 477                                    NULL, NULL,
 478                                    NULL,
 479                                    True);
 480
 481         return NT_STATUS_IS_OK(nt_status) ? True : False;
 482 }
 483
 484 static int server_info_dtor(auth_serversupplied_info *server_info)
 485 {
 486         TALLOC_FREE(server_info->sam_account);
 487         ZERO_STRUCTP(server_info);
 488         return 0;
 489 }
 490
 491 /***************************************************************************
 492  Make a server_info struct. Free with TALLOC_FREE().
 493 ***************************************************************************/
 494
 495 static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
 496 {
 497         struct auth_serversupplied_info *result;
 498
 499         result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
 500         if (result == NULL) {
 501                 DEBUG(0, ("talloc failed\n"));
 502                 return NULL;
 503         }
 504
 505         talloc_set_destructor(result, server_info_dtor);
 506
 507         /* Initialise the uid and gid values to something non-zero
 508            which may save us from giving away root access if there
 509            is a bug in allocating these fields. */
 510
 511         result->uid = -1;
 512         result->gid = -1;
 513         return result;
 514 }
 515
 516 /***************************************************************************
 517  Is the incoming username our own machine account ?
 518  If so, the connection is almost certainly from winbindd.
 519 ***************************************************************************/
 520
 521 static bool is_our_machine_account(const char *username)
 522 {
 523         bool ret;
 524         char *truncname = NULL;
 525         size_t ulen = strlen(username);
 526
 527         if (ulen == 0 || username[ulen-1] != '$') {
 528                 return false;
 529         }
 530         truncname = SMB_STRDUP(username);
 531         if (!truncname) {
 532                 return false;
 533         }
 534         truncname[ulen-1] = '\0';
 535         ret = strequal(truncname, global_myname());
 536         SAFE_FREE(truncname);
 537         return ret;
 538 }
 539
 540 /***************************************************************************
 541  Make (and fill) a user_info struct from a struct samu
 542 ***************************************************************************/
 543
 544 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 545                               struct samu *sampass)
 546 {
 547         struct passwd *pwd;
 548         gid_t *gids;
 549         auth_serversupplied_info *result;
 550         const char *username = pdb_get_username(sampass);
 551         NTSTATUS status;
 552
 553         if ( !(result = make_server_info(NULL)) ) {
 554                 return NT_STATUS_NO_MEMORY;
 555         }
 556
 557         if ( !(pwd = getpwnam_alloc(result, username)) ) {
 558                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
 559                           pdb_get_username(sampass)));
 560                 TALLOC_FREE(result);
 561                 return NT_STATUS_NO_SUCH_USER;
 562         }
 563
 564         result->sam_account = sampass;
 565         result->unix_name = pwd->pw_name;
 566         /* Ensure that we keep pwd->pw_name, because we will free pwd below */
 567         talloc_steal(result, pwd->pw_name);
 568         result->gid = pwd->pw_gid;
 569         result->uid = pwd->pw_uid;
 570
 571         TALLOC_FREE(pwd);
 572
 573         if (IS_DC && is_our_machine_account(username)) {
 574                 /*
 575                  * Ensure for a connection from our own
 576                  * machine account (from winbindd on a DC)
 577                  * there are no supplementary groups.
 578                  * Prevents loops in calling gid_to_sid().
 579                  */
 580                 result->sids = NULL;
 581                 gids = NULL;
 582                 result->num_sids = 0;
 583
 584                 /*
 585                  * This is a hack of monstrous proportions.
 586                  * If we know it's winbindd talking to us,
 587                  * we know we must never recurse into it,
 588                  * so turn off contacting winbindd for this
 589                  * entire process. This will get fixed when
 590                  * winbindd doesn't need to talk to smbd on
 591                  * a PDC. JRA.
 592                  */
 593
 594                 (void)winbind_off();
 595
 596                 DEBUG(10, ("make_server_info_sam: our machine account %s "
 597                         "setting supplementary group list empty and "
 598                         "turning off winbindd requests.\n",
 599                         username));
 600         } else {
 601                 status = pdb_enum_group_memberships(result, sampass,
 602                                             &result->sids, &gids,
 603                                             &result->num_sids);
 604
 605                 if (!NT_STATUS_IS_OK(status)) {
 606                         DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
 607                                    nt_errstr(status)));
 608                         result->sam_account = NULL; /* Don't free on error exit. */
 609                         TALLOC_FREE(result);
 610                         return status;
 611                 }
 612         }
 613
 614         /* For now we throw away the gids and convert via sid_to_gid
 615          * later. This needs fixing, but I'd like to get the code straight and
 616          * simple first. */
 617
 618         TALLOC_FREE(gids);
 619
 620         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
 621                  pdb_get_username(sampass), result->unix_name));
 622
 623         *server_info = result;
 624         /* Ensure thaat the sampass will be freed with the result */
 625         talloc_steal(result, sampass);
 626
 627         return NT_STATUS_OK;
 628 }
 629
 630 static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
 631 {
 632         char *command;
 633         char *group_sidstr;
 634         size_t i;
 635
 636         if ((lp_log_nt_token_command() == NULL) ||
 637             (strlen(lp_log_nt_token_command()) == 0)) {
 638                 return NT_STATUS_OK;
 639         }
 640
 641         group_sidstr = talloc_strdup(tmp_ctx, "");
 642         for (i=1; i<token->num_sids; i++) {
 643                 group_sidstr = talloc_asprintf(
 644                         tmp_ctx, "%s %s", group_sidstr,
 645                         sid_string_talloc(tmp_ctx, &token->user_sids[i]));
 646         }
 647
 648         command = talloc_string_sub(
 649                 tmp_ctx, lp_log_nt_token_command(),
 650                 "%s", sid_string_talloc(tmp_ctx, &token->user_sids[0]));
 651         command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
 652
 653         if (command == NULL) {
 654                 return NT_STATUS_NO_MEMORY;
 655         }
 656
 657         DEBUG(8, ("running command: [%s]\n", command));
 658         if (smbrun(command, NULL) != 0) {
 659                 DEBUG(0, ("Could not log NT token\n"));
 660                 return NT_STATUS_ACCESS_DENIED;
 661         }
 662
 663         return NT_STATUS_OK;
 664 }
 665
 666 /*
 667  * Create the token to use from server_info->sam_account and
 668  * server_info->sids (the info3/sam groups). Find the unix gids.
 669  */
 670
 671 NTSTATUS create_local_token(auth_serversupplied_info *server_info)
 672 {
 673         TALLOC_CTX *mem_ctx;
 674         NTSTATUS status;
 675         size_t i;
 676         struct dom_sid tmp_sid;
 677
 678         /*
 679          * If winbind is not around, we can not make much use of the SIDs the
 680          * domain controller provided us with. Likewise if the user name was
 681          * mapped to some local unix user.
 682          */
 683
 684         if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) ||
 685             (server_info->was_mapped)) {
 686                 status = create_token_from_username(server_info,
 687                                                     server_info->unix_name,
 688                                                     server_info->guest,
 689                                                     &server_info->uid,
 690                                                     &server_info->gid,
 691                                                     &server_info->unix_name,
 692                                                     &server_info->ptok);
 693
 694         } else {
 695                 server_info->ptok = create_local_nt_token(
 696                         server_info,
 697                         pdb_get_user_sid(server_info->sam_account),
 698                         server_info->guest,
 699                         server_info->num_sids, server_info->sids);
 700                 status = server_info->ptok ?
 701                         NT_STATUS_OK : NT_STATUS_NO_SUCH_USER;
 702         }
 703
 704         if (!NT_STATUS_IS_OK(status)) {
 705                 return status;
 706         }
 707
 708         /* Convert the SIDs to gids. */
 709
 710         server_info->n_groups = 0;
 711         server_info->groups = NULL;
 712
 713         /* Start at index 1, where the groups start. */
 714
 715         for (i=1; i<server_info->ptok->num_sids; i++) {
 716                 gid_t gid;
 717                 DOM_SID *sid = &server_info->ptok->user_sids[i];
 718
 719                 if (!sid_to_gid(sid, &gid)) {
 720                         DEBUG(10, ("Could not convert SID %s to gid, "
 721                                    "ignoring it\n", sid_string_dbg(sid)));
 722                         continue;
 723                 }
 724                 add_gid_to_array_unique(server_info, gid, &server_info->groups,
 725                                         &server_info->n_groups);
 726         }
 727
 728         if (!uid_to_unix_users_sid(server_info->uid, &tmp_sid)) {
 729                 DEBUG(1,("create_local_token: Failed to create SID "
 730                         "for uid %d!\n", server_info->uid));
 731         }
 732         add_sid_to_array_unique(server_info->ptok, &tmp_sid,
 733                                 &server_info->ptok->user_sids,
 734                                 &server_info->ptok->num_sids);
 735
 736         if (!gid_to_unix_groups_sid( server_info->gid, &tmp_sid)) {
 737                 DEBUG(1,("create_local_token: Failed to create SID "
 738                         "for gid %d!\n", server_info->gid));
 739         }
 740         add_sid_to_array_unique(server_info->ptok, &tmp_sid,
 741                                 &server_info->ptok->user_sids,
 742                                 &server_info->ptok->num_sids);
 743
 744         for ( i=0; i<server_info->n_groups; i++ ) {
 745                 if (!gid_to_unix_groups_sid( server_info->groups[i], &tmp_sid ) ) {
 746                         DEBUG(1,("create_local_token: Failed to create SID "
 747                                 "for gid %d!\n", server_info->groups[i]));
 748                         continue;
 749                 }
 750                 add_sid_to_array_unique(server_info->ptok, &tmp_sid,
 751                                         &server_info->ptok->user_sids,
 752                                         &server_info->ptok->num_sids);
 753         }
 754
 755         debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
 756         debug_unix_user_token(DBGC_AUTH, 10,
 757                               server_info->uid,
 758                               server_info->gid,
 759                               server_info->n_groups,
 760                               server_info->groups);
 761
 762         mem_ctx = talloc_new(NULL);
 763         if (mem_ctx == NULL) {
 764                 DEBUG(0, ("talloc_new failed\n"));
 765                 return NT_STATUS_NO_MEMORY;
 766         }
 767
 768         status = log_nt_token(mem_ctx, server_info->ptok);
 769
 770         TALLOC_FREE(mem_ctx);
 771         return status;
 772 }
 773
 774 /*
 775  * Create an artificial NT token given just a username. (Initially intended
 776  * for force user)
 777  *
 778  * We go through lookup_name() to avoid problems we had with 'winbind use
 779  * default domain'.
 780  *
 781  * We have 3 cases:
 782  *
 783  * unmapped unix users: Go directly to nss to find the user's group.
 784  *
 785  * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
 786  *
 787  * If the user is provided by winbind, the primary gid is set to "domain
 788  * users" of the user's domain. For an explanation why this is necessary, see
 789  * the thread starting at
 790  * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
 791  */
 792
 793 NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
 794                                     bool is_guest,
 795                                     uid_t *uid, gid_t *gid,
 796                                     char **found_username,
 797                                     struct nt_user_token **token)
 798 {
 799         NTSTATUS result = NT_STATUS_NO_SUCH_USER;
 800         TALLOC_CTX *tmp_ctx;
 801         DOM_SID user_sid;
 802         enum lsa_SidType type;
 803         gid_t *gids;
 804         DOM_SID *group_sids;
 805         DOM_SID unix_group_sid;
 806         size_t num_group_sids;
 807         size_t num_gids;
 808         size_t i;
 809
 810         tmp_ctx = talloc_new(NULL);
 811         if (tmp_ctx == NULL) {
 812                 DEBUG(0, ("talloc_new failed\n"));
 813                 return NT_STATUS_NO_MEMORY;
 814         }
 815
 816         if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
 817                          NULL, NULL, &user_sid, &type)) {
 818                 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
 819                 goto done;
 820         }
 821
 822         if (type != SID_NAME_USER) {
 823                 DEBUG(1, ("%s is a %s, not a user\n", username,
 824                           sid_type_lookup(type)));
 825                 goto done;
 826         }
 827
 828         if (sid_check_is_in_our_domain(&user_sid)) {
 829                 bool ret;
 830
 831                 /* This is a passdb user, so ask passdb */
 832
 833                 struct samu *sam_acct = NULL;
 834
 835                 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
 836                         result = NT_STATUS_NO_MEMORY;
 837                         goto done;
 838                 }
 839
 840                 become_root();
 841                 ret = pdb_getsampwsid(sam_acct, &user_sid);
 842                 unbecome_root();
 843
 844                 if (!ret) {
 845                         DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
 846                                   sid_string_dbg(&user_sid), username));
 847                         DEBUGADD(1, ("Fall back to unix user %s\n", username));
 848                         goto unix_user;
 849                 }
 850
 851                 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
 852                                                     &group_sids, &gids,
 853                                                     &num_group_sids);
 854                 if (!NT_STATUS_IS_OK(result)) {
 855                         DEBUG(10, ("enum_group_memberships failed for %s\n",
 856                                    username));
 857                         DEBUGADD(1, ("Fall back to unix user %s\n", username));
 858                         goto unix_user;
 859                 }
 860
 861                 /* see the smb_panic() in pdb_default_enum_group_memberships */
 862                 SMB_ASSERT(num_group_sids > 0);
 863
 864                 *gid = gids[0];
 865
 866                 /* Ensure we're returning the found_username on the right context. */
 867                 *found_username = talloc_strdup(mem_ctx,
 868                                                 pdb_get_username(sam_acct));
 869
 870         } else  if (sid_check_is_in_unix_users(&user_sid)) {
 871
 872                 /* This is a unix user not in passdb. We need to ask nss
 873                  * directly, without consulting passdb */
 874
 875                 struct passwd *pass;
 876
 877                 /*
 878                  * This goto target is used as a fallback for the passdb
 879                  * case. The concrete bug report is when passdb gave us an
 880                  * unmapped gid.
 881                  */
 882
 883         unix_user:
 884
 885                 if (!sid_to_uid(&user_sid, uid)) {
 886                         DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
 887                                   username, sid_string_dbg(&user_sid)));
 888                         goto done;
 889                 }
 890
 891                 uid_to_unix_users_sid(*uid, &user_sid);
 892
 893                 pass = getpwuid_alloc(tmp_ctx, *uid);
 894                 if (pass == NULL) {
 895                         DEBUG(1, ("getpwuid(%d) for user %s failed\n",
 896                                   *uid, username));
 897                         goto done;
 898                 }
 899
 900                 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
 901                                          &gids, &num_group_sids)) {
 902                         DEBUG(1, ("getgroups_unix_user for user %s failed\n",
 903                                   username));
 904                         goto done;
 905                 }
 906
 907                 if (num_group_sids) {
 908                         group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids);
 909                         if (group_sids == NULL) {
 910                                 DEBUG(1, ("TALLOC_ARRAY failed\n"));
 911                                 result = NT_STATUS_NO_MEMORY;
 912                                 goto done;
 913                         }
 914                 } else {
 915                         group_sids = NULL;
 916                 }
 917
 918                 for (i=0; i<num_group_sids; i++) {
 919                         gid_to_sid(&group_sids[i], gids[i]);
 920                 }
 921
 922                 /* In getgroups_unix_user we always set the primary gid */
 923                 SMB_ASSERT(num_group_sids > 0);
 924
 925                 *gid = gids[0];
 926
 927                 /* Ensure we're returning the found_username on the right context. */
 928                 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
 929         } else {
 930
 931                 /* This user is from winbind, force the primary gid to the
 932                  * user's "domain users" group. Under certain circumstances
 933                  * (user comes from NT4), this might be a loss of
 934                  * information. But we can not rely on winbind getting the
 935                  * correct info. AD might prohibit winbind looking up that
 936                  * information. */
 937
 938                 uint32 dummy;
 939
 940                 num_group_sids = 1;
 941                 group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids);
 942                 if (group_sids == NULL) {
 943                         DEBUG(1, ("TALLOC_ARRAY failed\n"));
 944                         result = NT_STATUS_NO_MEMORY;
 945                         goto done;
 946                 }
 947
 948                 sid_copy(&group_sids[0], &user_sid);
 949                 sid_split_rid(&group_sids[0], &dummy);
 950                 sid_append_rid(&group_sids[0], DOMAIN_GROUP_RID_USERS);
 951
 952                 if (!sid_to_gid(&group_sids[0], gid)) {
 953                         DEBUG(1, ("sid_to_gid(%s) failed\n",
 954                                   sid_string_dbg(&group_sids[0])));
 955                         goto done;
 956                 }
 957
 958                 gids = gid;
 959
 960                 /* Ensure we're returning the found_username on the right context. */
 961                 *found_username = talloc_strdup(mem_ctx, username);
 962         }
 963
 964         /* Add the "Unix Group" SID for each gid to catch mapped groups
 965            and their Unix equivalent.  This is to solve the backwards
 966            compatibility problem of 'valid users = +ntadmin' where
 967            ntadmin has been paired with "Domain Admins" in the group
 968            mapping table.  Otherwise smb.conf would need to be changed
 969            to 'valid user = "Domain Admins"'.  --jerry */
 970
 971         num_gids = num_group_sids;
 972         for ( i=0; i<num_gids; i++ ) {
 973                 gid_t high, low;
 974
 975                 /* don't pickup anything managed by Winbind */
 976
 977                 if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
 978                         continue;
 979
 980                 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
 981                         DEBUG(1,("create_token_from_username: Failed to create SID "
 982                                 "for gid %d!\n", gids[i]));
 983                         continue;
 984                 }
 985                 result = add_sid_to_array_unique(tmp_ctx, &unix_group_sid,
 986                                                  &group_sids, &num_group_sids);
 987                 if (!NT_STATUS_IS_OK(result)) {
 988                         goto done;
 989                 }
 990         }
 991
 992         /* Ensure we're creating the nt_token on the right context. */
 993         *token = create_local_nt_token(mem_ctx, &user_sid,
 994                                        is_guest, num_group_sids, group_sids);
 995
 996         if ((*token == NULL) || (*found_username == NULL)) {
 997                 result = NT_STATUS_NO_MEMORY;
 998                 goto done;
 999         }
1000
1001         result = NT_STATUS_OK;
1002  done:
1003         TALLOC_FREE(tmp_ctx);
1004         return result;
1005 }
1006
1007 /***************************************************************************
1008  Build upon create_token_from_username:
1009
1010  Expensive helper function to figure out whether a user given its name is
1011  member of a particular group.
1012 ***************************************************************************/
1013
1014 bool user_in_group_sid(const char *username, const DOM_SID *group_sid)
1015 {
1016         NTSTATUS status;
1017         uid_t uid;
1018         gid_t gid;
1019         char *found_username;
1020         struct nt_user_token *token;
1021         bool result;
1022
1023         TALLOC_CTX *mem_ctx;
1024
1025         mem_ctx = talloc_new(NULL);
1026         if (mem_ctx == NULL) {
1027                 DEBUG(0, ("talloc_new failed\n"));
1028                 return False;
1029         }
1030
1031         status = create_token_from_username(mem_ctx, username, False,
1032                                             &uid, &gid, &found_username,
1033                                             &token);
1034
1035         if (!NT_STATUS_IS_OK(status)) {
1036                 DEBUG(10, ("could not create token for %s\n", username));
1037                 return False;
1038         }
1039
1040         result = nt_token_check_sid(group_sid, token);
1041
1042         TALLOC_FREE(mem_ctx);
1043         return result;
1044
1045 }
1046
1047 bool user_in_group(const char *username, const char *groupname)
1048 {
1049         TALLOC_CTX *mem_ctx;
1050         DOM_SID group_sid;
1051         bool ret;
1052
1053         mem_ctx = talloc_new(NULL);
1054         if (mem_ctx == NULL) {
1055                 DEBUG(0, ("talloc_new failed\n"));
1056                 return False;
1057         }
1058
1059         ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
1060                           NULL, NULL, &group_sid, NULL);
1061         TALLOC_FREE(mem_ctx);
1062
1063         if (!ret) {
1064                 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
1065                 return False;
1066         }
1067
1068         return user_in_group_sid(username, &group_sid);
1069 }
1070
1071
1072 /***************************************************************************
1073  Make (and fill) a user_info struct from a 'struct passwd' by conversion
1074  to a struct samu
1075 ***************************************************************************/
1076
1077 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
1078                              char *unix_username,
1079                              struct passwd *pwd)
1080 {
1081         NTSTATUS status;
1082         struct samu *sampass = NULL;
1083         gid_t *gids;
1084         char *qualified_name = NULL;
1085         TALLOC_CTX *mem_ctx = NULL;
1086         DOM_SID u_sid;
1087         enum lsa_SidType type;
1088         auth_serversupplied_info *result;
1089
1090         if ( !(sampass = samu_new( NULL )) ) {
1091                 return NT_STATUS_NO_MEMORY;
1092         }
1093
1094         status = samu_set_unix( sampass, pwd );
1095         if (!NT_STATUS_IS_OK(status)) {
1096                 return status;
1097         }
1098
1099         result = make_server_info(NULL);
1100         if (result == NULL) {
1101                 TALLOC_FREE(sampass);
1102                 return NT_STATUS_NO_MEMORY;
1103         }
1104
1105         result->sam_account = sampass;
1106         result->unix_name = talloc_strdup(result, unix_username);
1107         result->uid = pwd->pw_uid;
1108         result->gid = pwd->pw_gid;
1109
1110         status = pdb_enum_group_memberships(result, sampass,
1111                                             &result->sids, &gids,
1112                                             &result->num_sids);
1113
1114         if (!NT_STATUS_IS_OK(status)) {
1115                 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
1116                            nt_errstr(status)));
1117                 TALLOC_FREE(result);
1118                 return status;
1119         }
1120
1121         /*
1122          * The SID returned in server_info->sam_account is based
1123          * on our SAM sid even though for a pure UNIX account this should
1124          * not be the case as it doesn't really exist in the SAM db.
1125          * This causes lookups on "[in]valid users" to fail as they
1126          * will lookup this name as a "Unix User" SID to check against
1127          * the user token. Fix this by adding the "Unix User"\unix_username
1128          * SID to the sid array. The correct fix should probably be
1129          * changing the server_info->sam_account user SID to be a
1130          * S-1-22 Unix SID, but this might break old configs where
1131          * plaintext passwords were used with no SAM backend.
1132          */
1133
1134         mem_ctx = talloc_init("make_server_info_pw_tmp");
1135         if (!mem_ctx) {
1136                 TALLOC_FREE(result);
1137                 return NT_STATUS_NO_MEMORY;
1138         }
1139
1140         qualified_name = talloc_asprintf(mem_ctx, "%s\\%s",
1141                                         unix_users_domain_name(),
1142                                         unix_username );
1143         if (!qualified_name) {
1144                 TALLOC_FREE(result);
1145                 TALLOC_FREE(mem_ctx);
1146                 return NT_STATUS_NO_MEMORY;
1147         }
1148
1149         if (!lookup_name(mem_ctx, qualified_name, LOOKUP_NAME_ALL,
1150                                                 NULL, NULL,
1151                                                 &u_sid, &type)) {
1152                 TALLOC_FREE(result);
1153                 TALLOC_FREE(mem_ctx);
1154                 return NT_STATUS_NO_SUCH_USER;
1155         }
1156
1157         TALLOC_FREE(mem_ctx);
1158
1159         if (type != SID_NAME_USER) {
1160                 TALLOC_FREE(result);
1161                 return NT_STATUS_NO_SUCH_USER;
1162         }
1163
1164         status = add_sid_to_array_unique(result, &u_sid,
1165                                          &result->sids,
1166                                          &result->num_sids);
1167         if (!NT_STATUS_IS_OK(status)) {
1168                 TALLOC_FREE(result);
1169                 return status;
1170         }
1171
1172         /* For now we throw away the gids and convert via sid_to_gid
1173          * later. This needs fixing, but I'd like to get the code straight and
1174          * simple first. */
1175         TALLOC_FREE(gids);
1176
1177         *server_info = result;
1178
1179         return NT_STATUS_OK;
1180 }
1181
1182 /***************************************************************************
1183  Make (and fill) a user_info struct for a guest login.
1184  This *must* succeed for smbd to start. If there is no mapping entry for
1185  the guest gid, then create one.
1186 ***************************************************************************/
1187
1188 static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
1189 {
1190         NTSTATUS status;
1191         struct samu *sampass = NULL;
1192         DOM_SID guest_sid;
1193         bool ret;
1194         char zeros[16];
1195
1196         if ( !(sampass = samu_new( NULL )) ) {
1197                 return NT_STATUS_NO_MEMORY;
1198         }
1199
1200         sid_copy(&guest_sid, get_global_sam_sid());
1201         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
1202
1203         become_root();
1204         ret = pdb_getsampwsid(sampass, &guest_sid);
1205         unbecome_root();
1206
1207         if (!ret) {
1208                 TALLOC_FREE(sampass);
1209                 return NT_STATUS_NO_SUCH_USER;
1210         }
1211
1212         status = make_server_info_sam(server_info, sampass);
1213         if (!NT_STATUS_IS_OK(status)) {
1214                 TALLOC_FREE(sampass);
1215                 return status;
1216         }
1217
1218         (*server_info)->guest = True;
1219
1220         status = create_local_token(*server_info);
1221         if (!NT_STATUS_IS_OK(status)) {
1222                 DEBUG(10, ("create_local_token failed: %s\n",
1223                            nt_errstr(status)));
1224                 return status;
1225         }
1226
1227         /* annoying, but the Guest really does have a session key, and it is
1228            all zeros! */
1229         ZERO_STRUCT(zeros);
1230         (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
1231         (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
1232
1233         return NT_STATUS_OK;
1234 }
1235
1236 static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
1237 {
1238         auth_serversupplied_info *dst;
1239
1240         dst = make_server_info(NULL);
1241         if (dst == NULL) {
1242                 return NULL;
1243         }
1244
1245         dst->guest = src->guest;
1246         dst->uid = src->uid;
1247         dst->gid = src->gid;
1248         dst->n_groups = src->n_groups;
1249         if (src->n_groups != 0) {
1250                 dst->groups = (gid_t *)TALLOC_MEMDUP(
1251                         dst, src->groups, sizeof(gid_t)*dst->n_groups);
1252         } else {
1253                 dst->groups = NULL;
1254         }
1255
1256         if (src->ptok) {
1257                 dst->ptok = dup_nt_token(dst, src->ptok);
1258                 if (!dst->ptok) {
1259                         TALLOC_FREE(dst);
1260                         return NULL;
1261                 }
1262         }
1263
1264         dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
1265                                                 src->user_session_key.length);
1266
1267         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1268                                                 src->lm_session_key.length);
1269
1270         dst->sam_account = samu_new(NULL);
1271         if (!dst->sam_account) {
1272                 TALLOC_FREE(dst);
1273                 return NULL;
1274         }
1275
1276         if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) {
1277                 TALLOC_FREE(dst);
1278                 return NULL;
1279         }
1280
1281         dst->pam_handle = NULL;
1282         dst->unix_name = talloc_strdup(dst, src->unix_name);
1283         if (!dst->unix_name) {
1284                 TALLOC_FREE(dst);
1285                 return NULL;
1286         }
1287
1288         return dst;
1289 }
1290
1291 static auth_serversupplied_info *guest_info = NULL;
1292
1293 bool init_guest_info(void)
1294 {
1295         if (guest_info != NULL)
1296                 return True;
1297
1298         return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
1299 }
1300
1301 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
1302 {
1303         *server_info = copy_serverinfo(guest_info);
1304         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1305 }
1306
1307 bool copy_current_user(struct current_user *dst, struct current_user *src)
1308 {
1309         gid_t *groups;
1310         NT_USER_TOKEN *nt_token;
1311
1312         groups = (gid_t *)memdup(src->ut.groups,
1313                                  sizeof(gid_t) * src->ut.ngroups);
1314         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1315                 return False;
1316         }
1317
1318         nt_token = dup_nt_token(NULL, src->nt_user_token);
1319         if (nt_token == NULL) {
1320                 SAFE_FREE(groups);
1321                 return False;
1322         }
1323
1324         dst->conn = src->conn;
1325         dst->vuid = src->vuid;
1326         dst->ut.uid = src->ut.uid;
1327         dst->ut.gid = src->ut.gid;
1328         dst->ut.ngroups = src->ut.ngroups;
1329         dst->ut.groups = groups;
1330         dst->nt_user_token = nt_token;
1331         return True;
1332 }
1333
1334 bool set_current_user_guest(struct current_user *dst)
1335 {
1336         gid_t *groups;
1337         NT_USER_TOKEN *nt_token;
1338
1339         groups = (gid_t *)memdup(guest_info->groups,
1340                                  sizeof(gid_t) * guest_info->n_groups);
1341         if (groups == NULL) {
1342                 return False;
1343         }
1344
1345         nt_token = dup_nt_token(NULL, guest_info->ptok);
1346         if (nt_token == NULL) {
1347                 SAFE_FREE(groups);
1348                 return False;
1349         }
1350
1351         TALLOC_FREE(dst->nt_user_token);
1352         SAFE_FREE(dst->ut.groups);
1353
1354         /* dst->conn is never really dereferenced, it's only tested for
1355          * equality in uid.c */
1356         dst->conn = NULL;
1357
1358         dst->vuid = UID_FIELD_INVALID;
1359         dst->ut.uid = guest_info->uid;
1360         dst->ut.gid = guest_info->gid;
1361         dst->ut.ngroups = guest_info->n_groups;
1362         dst->ut.groups = groups;
1363         dst->nt_user_token = nt_token;
1364         return True;
1365 }
1366
1367 /***************************************************************************
1368  Purely internal function for make_server_info_info3
1369  Fill the sam account from getpwnam
1370 ***************************************************************************/
1371 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
1372                                  const char *domain,
1373                                  const char *username,
1374                                  char **found_username,
1375                                  uid_t *uid, gid_t *gid,
1376                                  struct samu *account,
1377                                  bool *username_was_mapped)
1378 {
1379         NTSTATUS nt_status;
1380         fstring dom_user, lower_username;
1381         fstring real_username;
1382         struct passwd *passwd;
1383
1384         fstrcpy( lower_username, username );
1385         strlower_m( lower_username );
1386
1387         fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
1388                 lower_username);
1389
1390         /* Get the passwd struct.  Try to create the account is necessary. */
1391
1392         *username_was_mapped = map_username( dom_user );
1393
1394         if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
1395                 return NT_STATUS_NO_SUCH_USER;
1396
1397         *uid = passwd->pw_uid;
1398         *gid = passwd->pw_gid;
1399
1400         /* This is pointless -- there is no suport for differing
1401            unix and windows names.  Make sure to always store the
1402            one we actually looked up and succeeded. Have I mentioned
1403            why I hate the 'winbind use default domain' parameter?
1404                                          --jerry              */
1405
1406         *found_username = talloc_strdup( mem_ctx, real_username );
1407
1408         DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
1409
1410         nt_status = samu_set_unix( account, passwd );
1411
1412         TALLOC_FREE(passwd);
1413
1414         return nt_status;
1415 }
1416
1417 /****************************************************************************
1418  Wrapper to allow the getpwnam() call to strip the domain name and
1419  try again in case a local UNIX user is already there.  Also run through
1420  the username if we fallback to the username only.
1421  ****************************************************************************/
1422
1423 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
1424                              fstring save_username, bool create )
1425 {
1426         struct passwd *pw = NULL;
1427         char *p;
1428         fstring username;
1429
1430         /* we only save a copy of the username it has been mangled
1431            by winbindd use default domain */
1432
1433         save_username[0] = '\0';
1434
1435         /* don't call map_username() here since it has to be done higher
1436            up the stack so we don't call it mutliple times */
1437
1438         fstrcpy( username, domuser );
1439
1440         p = strchr_m( username, *lp_winbind_separator() );
1441
1442         /* code for a DOMAIN\user string */
1443
1444         if ( p ) {
1445                 fstring strip_username;
1446
1447                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1448                 if ( pw ) {
1449                         /* make sure we get the case of the username correct */
1450                         /* work around 'winbind use default domain = yes' */
1451
1452                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1453                                 char *domain;
1454
1455                                 /* split the domain and username into 2 strings */
1456                                 *p = '\0';
1457                                 domain = username;
1458
1459                                 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1460                         }
1461                         else
1462                                 fstrcpy( save_username, pw->pw_name );
1463
1464                         /* whew -- done! */
1465                         return pw;
1466                 }
1467
1468                 /* setup for lookup of just the username */
1469                 /* remember that p and username are overlapping memory */
1470
1471                 p++;
1472                 fstrcpy( strip_username, p );
1473                 fstrcpy( username, strip_username );
1474         }
1475
1476         /* just lookup a plain username */
1477
1478         pw = Get_Pwnam_alloc(mem_ctx, username);
1479
1480         /* Create local user if requested but only if winbindd
1481            is not running.  We need to protect against cases
1482            where winbindd is failing and then prematurely
1483            creating users in /etc/passwd */
1484
1485         if ( !pw && create && !winbind_ping() ) {
1486                 /* Don't add a machine account. */
1487                 if (username[strlen(username)-1] == '$')
1488                         return NULL;
1489
1490                 smb_create_user(NULL, username, NULL);
1491                 pw = Get_Pwnam_alloc(mem_ctx, username);
1492         }
1493
1494         /* one last check for a valid passwd struct */
1495
1496         if ( pw )
1497                 fstrcpy( save_username, pw->pw_name );
1498
1499         return pw;
1500 }
1501
1502 /***************************************************************************
1503  Make a server_info struct from the info3 returned by a domain logon
1504 ***************************************************************************/
1505
1506 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1507                                 const char *sent_nt_username,
1508                                 const char *domain,
1509                                 auth_serversupplied_info **server_info,
1510                                 struct netr_SamInfo3 *info3)
1511 {
1512         char zeros[16];
1513
1514         NTSTATUS nt_status = NT_STATUS_OK;
1515         char *found_username = NULL;
1516         const char *nt_domain;
1517         const char *nt_username;
1518         struct samu *sam_account = NULL;
1519         DOM_SID user_sid;
1520         DOM_SID group_sid;
1521         bool username_was_mapped;
1522
1523         uid_t uid = (uid_t)-1;
1524         gid_t gid = (gid_t)-1;
1525
1526         auth_serversupplied_info *result;
1527
1528         /*
1529            Here is where we should check the list of
1530            trusted domains, and verify that the SID
1531            matches.
1532         */
1533
1534         sid_copy(&user_sid, info3->base.domain_sid);
1535         if (!sid_append_rid(&user_sid, info3->base.rid)) {
1536                 return NT_STATUS_INVALID_PARAMETER;
1537         }
1538
1539         sid_copy(&group_sid, info3->base.domain_sid);
1540         if (!sid_append_rid(&group_sid, info3->base.primary_gid)) {
1541                 return NT_STATUS_INVALID_PARAMETER;
1542         }
1543
1544         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
1545         if (!nt_username) {
1546                 /* If the server didn't give us one, just use the one we sent
1547                  * them */
1548                 nt_username = sent_nt_username;
1549         }
1550
1551         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
1552         if (!nt_domain) {
1553                 /* If the server didn't give us one, just use the one we sent
1554                  * them */
1555                 nt_domain = domain;
1556         }
1557
1558         /* try to fill the SAM account..  If getpwnam() fails, then try the
1559            add user script (2.2.x behavior).
1560
1561            We use the _unmapped_ username here in an attempt to provide
1562            consistent username mapping behavior between kerberos and NTLM[SSP]
1563            authentication in domain mode security.  I.E. Username mapping
1564            should be applied to the fully qualified username
1565            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1566            called map_username() unnecessarily in make_user_info_map() but
1567            that is how the current code is designed.  Making the change here
1568            is the least disruptive place.  -- jerry */
1569
1570         if ( !(sam_account = samu_new( NULL )) ) {
1571                 return NT_STATUS_NO_MEMORY;
1572         }
1573
1574         /* this call will try to create the user if necessary */
1575
1576         nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1577                                      &found_username, &uid, &gid, sam_account,
1578                                      &username_was_mapped);
1579
1580
1581         /* if we still don't have a valid unix account check for
1582           'map to guest = bad uid' */
1583
1584         if (!NT_STATUS_IS_OK(nt_status)) {
1585                 TALLOC_FREE( sam_account );
1586                 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1587                         make_server_info_guest(server_info);
1588                         return NT_STATUS_OK;
1589                 }
1590                 return nt_status;
1591         }
1592
1593         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1594                 TALLOC_FREE(sam_account);
1595                 return NT_STATUS_NO_MEMORY;
1596         }
1597
1598         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1599                 TALLOC_FREE(sam_account);
1600                 return NT_STATUS_NO_MEMORY;
1601         }
1602
1603         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1604                 TALLOC_FREE(sam_account);
1605                 return NT_STATUS_NO_MEMORY;
1606         }
1607
1608         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1609                 TALLOC_FREE(sam_account);
1610                 return NT_STATUS_UNSUCCESSFUL;
1611         }
1612
1613         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1614                 TALLOC_FREE(sam_account);
1615                 return NT_STATUS_UNSUCCESSFUL;
1616         }
1617
1618         if (!pdb_set_fullname(sam_account,
1619                               info3->base.full_name.string,
1620                               PDB_CHANGED)) {
1621                 TALLOC_FREE(sam_account);
1622                 return NT_STATUS_NO_MEMORY;
1623         }
1624
1625         if (!pdb_set_logon_script(sam_account,
1626                                   info3->base.logon_script.string,
1627                                   PDB_CHANGED)) {
1628                 TALLOC_FREE(sam_account);
1629                 return NT_STATUS_NO_MEMORY;
1630         }
1631
1632         if (!pdb_set_profile_path(sam_account,
1633                                   info3->base.profile_path.string,
1634                                   PDB_CHANGED)) {
1635                 TALLOC_FREE(sam_account);
1636                 return NT_STATUS_NO_MEMORY;
1637         }
1638
1639         if (!pdb_set_homedir(sam_account,
1640                              info3->base.home_directory.string,
1641                              PDB_CHANGED)) {
1642                 TALLOC_FREE(sam_account);
1643                 return NT_STATUS_NO_MEMORY;
1644         }
1645
1646         if (!pdb_set_dir_drive(sam_account,
1647                                info3->base.home_drive.string,
1648                                PDB_CHANGED)) {
1649                 TALLOC_FREE(sam_account);
1650                 return NT_STATUS_NO_MEMORY;
1651         }
1652
1653         if (!pdb_set_acct_ctrl(sam_account, info3->base.acct_flags, PDB_CHANGED)) {
1654                 TALLOC_FREE(sam_account);
1655                 return NT_STATUS_NO_MEMORY;
1656         }
1657
1658         if (!pdb_set_pass_last_set_time(
1659                     sam_account,
1660                     nt_time_to_unix(info3->base.last_password_change),
1661                     PDB_CHANGED)) {
1662                 TALLOC_FREE(sam_account);
1663                 return NT_STATUS_NO_MEMORY;
1664         }
1665
1666         if (!pdb_set_pass_can_change_time(
1667                     sam_account,
1668                     nt_time_to_unix(info3->base.allow_password_change),
1669                     PDB_CHANGED)) {
1670                 TALLOC_FREE(sam_account);
1671                 return NT_STATUS_NO_MEMORY;
1672         }
1673
1674         if (!pdb_set_pass_must_change_time(
1675                     sam_account,
1676                     nt_time_to_unix(info3->base.force_password_change),
1677                     PDB_CHANGED)) {
1678                 TALLOC_FREE(sam_account);
1679                 return NT_STATUS_NO_MEMORY;
1680         }
1681
1682         result = make_server_info(NULL);
1683         if (result == NULL) {
1684                 DEBUG(4, ("make_server_info failed!\n"));
1685                 TALLOC_FREE(sam_account);
1686                 return NT_STATUS_NO_MEMORY;
1687         }
1688
1689         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1690            valid struct samu) */
1691
1692         result->sam_account = sam_account;
1693         result->unix_name = talloc_strdup(result, found_username);
1694
1695         /* Fill in the unix info we found on the way */
1696
1697         result->uid = uid;
1698         result->gid = gid;
1699
1700         /* Create a 'combined' list of all SIDs we might want in the SD */
1701
1702         result->num_sids = 0;
1703         result->sids = NULL;
1704
1705         nt_status = sid_array_from_info3(result, info3,
1706                                          &result->sids,
1707                                          &result->num_sids,
1708                                          false, false);
1709         if (!NT_STATUS_IS_OK(nt_status)) {
1710                 TALLOC_FREE(result);
1711                 return nt_status;
1712         }
1713
1714         /* Ensure the primary group sid is at position 0. */
1715         sort_sid_array_for_smbd(result, &group_sid);
1716
1717         result->login_server = talloc_strdup(result,
1718                                              info3->base.logon_server.string);
1719
1720         /* ensure we are never given NULL session keys */
1721
1722         ZERO_STRUCT(zeros);
1723
1724         if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {
1725                 result->user_session_key = data_blob_null;
1726         } else {
1727                 result->user_session_key = data_blob_talloc(
1728                         result, info3->base.key.key,
1729                         sizeof(info3->base.key.key));
1730         }
1731
1732         if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) {
1733                 result->lm_session_key = data_blob_null;
1734         } else {
1735                 result->lm_session_key = data_blob_talloc(
1736                         result, info3->base.LMSessKey.key,
1737                         sizeof(info3->base.LMSessKey.key));
1738         }
1739
1740         result->was_mapped = username_was_mapped;
1741
1742         *server_info = result;
1743
1744         return NT_STATUS_OK;
1745 }
1746
1747 /*****************************************************************************
1748  Make a server_info struct from the wbcAuthUserInfo returned by a domain logon
1749 ******************************************************************************/
1750
1751 NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
1752                                           const char *sent_nt_username,
1753                                           const char *domain,
1754                                           const struct wbcAuthUserInfo *info,
1755                                           auth_serversupplied_info **server_info)
1756 {
1757         char zeros[16];
1758
1759         NTSTATUS nt_status = NT_STATUS_OK;
1760         char *found_username = NULL;
1761         const char *nt_domain;
1762         const char *nt_username;
1763         struct samu *sam_account = NULL;
1764         DOM_SID user_sid;
1765         DOM_SID group_sid;
1766         bool username_was_mapped;
1767         uint32_t i;
1768
1769         uid_t uid = (uid_t)-1;
1770         gid_t gid = (gid_t)-1;
1771
1772         auth_serversupplied_info *result;
1773
1774         result = make_server_info(NULL);
1775         if (result == NULL) {
1776                 DEBUG(4, ("make_server_info failed!\n"));
1777                 return NT_STATUS_NO_MEMORY;
1778         }
1779
1780         /*
1781            Here is where we should check the list of
1782            trusted domains, and verify that the SID
1783            matches.
1784         */
1785
1786         memcpy(&user_sid, &info->sids[0].sid, sizeof(user_sid));
1787         memcpy(&group_sid, &info->sids[1].sid, sizeof(group_sid));
1788
1789         if (info->account_name) {
1790                 nt_username = talloc_strdup(result, info->account_name);
1791         } else {
1792                 /* If the server didn't give us one, just use the one we sent
1793                  * them */
1794                 nt_username = talloc_strdup(result, sent_nt_username);
1795         }
1796         if (!nt_username) {
1797                 TALLOC_FREE(result);
1798                 return NT_STATUS_NO_MEMORY;
1799         }
1800
1801         if (info->domain_name) {
1802                 nt_domain = talloc_strdup(result, info->domain_name);
1803         } else {
1804                 /* If the server didn't give us one, just use the one we sent
1805                  * them */
1806                 nt_domain = talloc_strdup(result, domain);
1807         }
1808         if (!nt_domain) {
1809                 TALLOC_FREE(result);
1810                 return NT_STATUS_NO_MEMORY;
1811         }
1812
1813         /* try to fill the SAM account..  If getpwnam() fails, then try the
1814            add user script (2.2.x behavior).
1815
1816            We use the _unmapped_ username here in an attempt to provide
1817            consistent username mapping behavior between kerberos and NTLM[SSP]
1818            authentication in domain mode security.  I.E. Username mapping
1819            should be applied to the fully qualified username
1820            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1821            called map_username() unnecessarily in make_user_info_map() but
1822            that is how the current code is designed.  Making the change here
1823            is the least disruptive place.  -- jerry */
1824
1825         if ( !(sam_account = samu_new( result )) ) {
1826                 TALLOC_FREE(result);
1827                 return NT_STATUS_NO_MEMORY;
1828         }
1829
1830         /* this call will try to create the user if necessary */
1831
1832         nt_status = fill_sam_account(result, nt_domain, sent_nt_username,
1833                                      &found_username, &uid, &gid, sam_account,
1834                                      &username_was_mapped);
1835
1836         /* if we still don't have a valid unix account check for
1837           'map to guest = bad uid' */
1838
1839         if (!NT_STATUS_IS_OK(nt_status)) {
1840                 TALLOC_FREE( result );
1841                 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1842                         make_server_info_guest(server_info);
1843                         return NT_STATUS_OK;
1844                 }
1845                 return nt_status;
1846         }
1847
1848         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1849                 TALLOC_FREE(result);
1850                 return NT_STATUS_NO_MEMORY;
1851         }
1852
1853         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1854                 TALLOC_FREE(result);
1855                 return NT_STATUS_NO_MEMORY;
1856         }
1857
1858         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1859                 TALLOC_FREE(result);
1860                 return NT_STATUS_NO_MEMORY;
1861         }
1862
1863         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1864                 TALLOC_FREE(result);
1865                 return NT_STATUS_UNSUCCESSFUL;
1866         }
1867
1868         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1869                 TALLOC_FREE(result);
1870                 return NT_STATUS_UNSUCCESSFUL;
1871         }
1872
1873         if (!pdb_set_fullname(sam_account, info->full_name, PDB_CHANGED)) {
1874                 TALLOC_FREE(result);
1875                 return NT_STATUS_NO_MEMORY;
1876         }
1877
1878         if (!pdb_set_logon_script(sam_account, info->logon_script, PDB_CHANGED)) {
1879                 TALLOC_FREE(result);
1880                 return NT_STATUS_NO_MEMORY;
1881         }
1882
1883         if (!pdb_set_profile_path(sam_account, info->profile_path, PDB_CHANGED)) {
1884                 TALLOC_FREE(result);
1885                 return NT_STATUS_NO_MEMORY;
1886         }
1887
1888         if (!pdb_set_homedir(sam_account, info->home_directory, PDB_CHANGED)) {
1889                 TALLOC_FREE(result);
1890                 return NT_STATUS_NO_MEMORY;
1891         }
1892
1893         if (!pdb_set_dir_drive(sam_account, info->home_drive, PDB_CHANGED)) {
1894                 TALLOC_FREE(result);
1895                 return NT_STATUS_NO_MEMORY;
1896         }
1897
1898         if (!pdb_set_acct_ctrl(sam_account, info->acct_flags, PDB_CHANGED)) {
1899                 TALLOC_FREE(result);
1900                 return NT_STATUS_NO_MEMORY;
1901         }
1902
1903         if (!pdb_set_pass_last_set_time(
1904                     sam_account,
1905                     nt_time_to_unix(info->pass_last_set_time),
1906                     PDB_CHANGED)) {
1907                 TALLOC_FREE(result);
1908                 return NT_STATUS_NO_MEMORY;
1909         }
1910
1911         if (!pdb_set_pass_can_change_time(
1912                     sam_account,
1913                     nt_time_to_unix(info->pass_can_change_time),
1914                     PDB_CHANGED)) {
1915                 TALLOC_FREE(result);
1916                 return NT_STATUS_NO_MEMORY;
1917         }
1918
1919         if (!pdb_set_pass_must_change_time(
1920                     sam_account,
1921                     nt_time_to_unix(info->pass_must_change_time),
1922                     PDB_CHANGED)) {
1923                 TALLOC_FREE(result);
1924                 return NT_STATUS_NO_MEMORY;
1925         }
1926
1927         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1928            valid struct samu) */
1929
1930         result->sam_account = sam_account;
1931         result->unix_name = talloc_strdup(result, found_username);
1932
1933         result->login_server = talloc_strdup(result, info->logon_server);
1934
1935         /* Fill in the unix info we found on the way */
1936
1937         result->uid = uid;
1938         result->gid = gid;
1939
1940         /* Create a 'combined' list of all SIDs we might want in the SD */
1941
1942         result->num_sids = info->num_sids - 2;
1943         result->sids = talloc_array(result, DOM_SID, result->num_sids);
1944         if (result->sids == NULL) {
1945                 TALLOC_FREE(result);
1946                 return NT_STATUS_NO_MEMORY;
1947         }
1948
1949         for (i=0; i < result->num_sids; i++) {
1950                 memcpy(&result->sids[i], &info->sids[i+2].sid, sizeof(result->sids[i]));
1951         }
1952
1953         /* Ensure the primary group sid is at position 0. */
1954         sort_sid_array_for_smbd(result, &group_sid);
1955
1956         /* ensure we are never given NULL session keys */
1957
1958         ZERO_STRUCT(zeros);
1959
1960         if (memcmp(info->user_session_key, zeros, sizeof(zeros)) == 0) {
1961                 result->user_session_key = data_blob_null;
1962         } else {
1963                 result->user_session_key = data_blob_talloc(
1964                         result, info->user_session_key,
1965                         sizeof(info->user_session_key));
1966         }
1967
1968         if (memcmp(info->lm_session_key, zeros, 8) == 0) {
1969                 result->lm_session_key = data_blob_null;
1970         } else {
1971                 result->lm_session_key = data_blob_talloc(
1972                         result, info->lm_session_key,
1973                         sizeof(info->lm_session_key));
1974         }
1975
1976         result->was_mapped = username_was_mapped;
1977
1978         *server_info = result;
1979
1980         return NT_STATUS_OK;
1981 }
1982
1983 /***************************************************************************
1984  Free a user_info struct
1985 ***************************************************************************/
1986
1987 void free_user_info(auth_usersupplied_info **user_info)
1988 {
1989         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1990         if (*user_info != NULL) {
1991                 if ((*user_info)->smb_name) {
1992                         DEBUG(10,("structure was created for %s\n",
1993                                   (*user_info)->smb_name));
1994                 }
1995                 SAFE_FREE((*user_info)->smb_name);
1996                 SAFE_FREE((*user_info)->internal_username);
1997                 SAFE_FREE((*user_info)->client_domain);
1998                 SAFE_FREE((*user_info)->domain);
1999                 SAFE_FREE((*user_info)->wksta_name);
2000                 data_blob_free(&(*user_info)->lm_resp);
2001                 data_blob_free(&(*user_info)->nt_resp);
2002                 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
2003                 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
2004                 data_blob_clear_free(&(*user_info)->plaintext_password);
2005                 ZERO_STRUCT(**user_info);
2006         }
2007         SAFE_FREE(*user_info);
2008 }
2009
2010 /***************************************************************************
2011  Make an auth_methods struct
2012 ***************************************************************************/
2013
2014 bool make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
2015 {
2016         if (!auth_context) {
2017                 smb_panic("no auth_context supplied to "
2018                           "make_auth_methods()!\n");
2019         }
2020
2021         if (!auth_method) {
2022                 smb_panic("make_auth_methods: pointer to auth_method pointer "
2023                           "is NULL!\n");
2024         }
2025
2026         *auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
2027         if (!*auth_method) {
2028                 DEBUG(0,("make_auth_method: malloc failed!\n"));
2029                 return False;
2030         }
2031         ZERO_STRUCTP(*auth_method);
2032
2033         return True;
2034 }
2035
2036 /**
2037  * Verify whether or not given domain is trusted.
2038  *
2039  * @param domain_name name of the domain to be verified
2040  * @return true if domain is one of the trusted once or
2041  *         false if otherwise
2042  **/
2043
2044 bool is_trusted_domain(const char* dom_name)
2045 {
2046         DOM_SID trustdom_sid;
2047         bool ret;
2048
2049         /* no trusted domains for a standalone server */
2050
2051         if ( lp_server_role() == ROLE_STANDALONE )
2052                 return False;
2053
2054         /* if we are a DC, then check for a direct trust relationships */
2055
2056         if ( IS_DC ) {
2057                 become_root();
2058                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
2059                           "[%s]\n", dom_name ));
2060                 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
2061                 unbecome_root();
2062                 if (ret)
2063                         return True;
2064         }
2065         else {
2066                 wbcErr result;
2067
2068                 /* If winbind is around, ask it */
2069
2070                 result = wb_is_trusted_domain(dom_name);
2071
2072                 if (result == WBC_ERR_SUCCESS) {
2073                         return True;
2074                 }
2075
2076                 if (result == WBC_ERR_DOMAIN_NOT_FOUND) {
2077                         /* winbind could not find the domain */
2078                         return False;
2079                 }
2080
2081                 /* The only other possible result is that winbind is not up
2082                    and running. We need to update the trustdom_cache
2083                    ourselves */
2084
2085                 update_trustdom_cache();
2086         }
2087
2088         /* now the trustdom cache should be available a DC could still
2089          * have a transitive trust so fall back to the cache of trusted
2090          * domains (like a domain member would use  */
2091
2092         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
2093                 return True;
2094         }
2095
2096         return False;
2097 }
2098