source3/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  Create a UNIX user on demand.
  31 ****************************************************************************/
  32
  33 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  34 {
  35         TALLOC_CTX *ctx = talloc_tos();
  36         char *add_script;
  37         int ret;
  38
  39         add_script = talloc_strdup(ctx, lp_adduser_script());
  40         if (!add_script || !*add_script) {
  41                 return -1;
  42         }
  43         add_script = talloc_all_string_sub(ctx,
  44                                 add_script,
  45                                 "%u",
  46                                 unix_username);
  47         if (!add_script) {
  48                 return -1;
  49         }
  50         if (domain) {
  51                 add_script = talloc_all_string_sub(ctx,
  52                                         add_script,
  53                                         "%D",
  54                                         domain);
  55                 if (!add_script) {
  56                         return -1;
  57                 }
  58         }
  59         if (homedir) {
  60                 add_script = talloc_all_string_sub(ctx,
  61                                 add_script,
  62                                 "%H",
  63                                 homedir);
  64                 if (!add_script) {
  65                         return -1;
  66                 }
  67         }
  68         ret = smbrun(add_script,NULL);
  69         flush_pwnam_cache();
  70         DEBUG(ret ? 0 : 3,
  71                 ("smb_create_user: Running the command `%s' gave %d\n",
  72                  add_script,ret));
  73         return ret;
  74 }
  75
  76 /****************************************************************************
  77  Create an auth_usersupplied_data structure
  78 ****************************************************************************/
  79
  80 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
  81                                const char *smb_name,
  82                                const char *internal_username,
  83                                const char *client_domain,
  84                                const char *domain,
  85                                const char *wksta_name,
  86                                DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
  87                                DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
  88                                DATA_BLOB *plaintext,
  89                                bool encrypted)
  90 {
  91
  92         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
  93
  94         *user_info = SMB_MALLOC_P(auth_usersupplied_info);
  95         if (*user_info == NULL) {
  96                 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
  97                 return NT_STATUS_NO_MEMORY;
  98         }
  99
 100         ZERO_STRUCTP(*user_info);
 101
 102         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 103
 104         (*user_info)->smb_name = SMB_STRDUP(smb_name);
 105         if ((*user_info)->smb_name == NULL) {
 106                 free_user_info(user_info);
 107                 return NT_STATUS_NO_MEMORY;
 108         }
 109
 110         (*user_info)->internal_username = SMB_STRDUP(internal_username);
 111         if ((*user_info)->internal_username == NULL) {
 112                 free_user_info(user_info);
 113                 return NT_STATUS_NO_MEMORY;
 114         }
 115
 116         (*user_info)->domain = SMB_STRDUP(domain);
 117         if ((*user_info)->domain == NULL) {
 118                 free_user_info(user_info);
 119                 return NT_STATUS_NO_MEMORY;
 120         }
 121
 122         (*user_info)->client_domain = SMB_STRDUP(client_domain);
 123         if ((*user_info)->client_domain == NULL) {
 124                 free_user_info(user_info);
 125                 return NT_STATUS_NO_MEMORY;
 126         }
 127
 128         (*user_info)->wksta_name = SMB_STRDUP(wksta_name);
 129         if ((*user_info)->wksta_name == NULL) {
 130                 free_user_info(user_info);
 131                 return NT_STATUS_NO_MEMORY;
 132         }
 133
 134         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 135
 136         if (lm_pwd)
 137                 (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
 138         if (nt_pwd)
 139                 (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
 140         if (lm_interactive_pwd)
 141                 (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
 142         if (nt_interactive_pwd)
 143                 (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
 144
 145         if (plaintext)
 146                 (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
 147
 148         (*user_info)->encrypted = encrypted;
 149
 150         (*user_info)->logon_parameters = 0;
 151
 152         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 153
 154         return NT_STATUS_OK;
 155 }
 156
 157 /****************************************************************************
 158  Create an auth_usersupplied_data structure after appropriate mapping.
 159 ****************************************************************************/
 160
 161 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 162                             const char *smb_name,
 163                             const char *client_domain,
 164                             const char *wksta_name,
 165                             DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
 166                             DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
 167                             DATA_BLOB *plaintext,
 168                             bool encrypted)
 169 {
 170         const char *domain;
 171         NTSTATUS result;
 172         bool was_mapped;
 173         fstring internal_username;
 174         fstrcpy(internal_username, smb_name);
 175         was_mapped = map_username(internal_username);
 176
 177         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 178               client_domain, smb_name, wksta_name));
 179
 180         /* don't allow "" as a domain, fixes a Win9X bug
 181            where it doens't supply a domain for logon script
 182            'net use' commands.                                 */
 183
 184         if ( *client_domain )
 185                 domain = client_domain;
 186         else
 187                 domain = lp_workgroup();
 188
 189         /* do what win2k does.  Always map unknown domains to our own
 190            and let the "passdb backend" handle unknown users. */
 191
 192         if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
 193                 domain = my_sam_name();
 194
 195         /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
 196
 197         result = make_user_info(user_info, smb_name, internal_username,
 198                               client_domain, domain, wksta_name,
 199                               lm_pwd, nt_pwd,
 200                               lm_interactive_pwd, nt_interactive_pwd,
 201                               plaintext, encrypted);
 202         if (NT_STATUS_IS_OK(result)) {
 203                 (*user_info)->was_mapped = was_mapped;
 204         }
 205         return result;
 206 }
 207
 208 /****************************************************************************
 209  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 210  Decrypt and encrypt the passwords.
 211 ****************************************************************************/
 212
 213 bool make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 214                                      const char *smb_name,
 215                                      const char *client_domain,
 216                                      const char *wksta_name,
 217                                      uint32 logon_parameters,
 218                                      const uchar *lm_network_pwd,
 219                                      int lm_pwd_len,
 220                                      const uchar *nt_network_pwd,
 221                                      int nt_pwd_len)
 222 {
 223         bool ret;
 224         NTSTATUS status;
 225         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 226         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 227
 228         status = make_user_info_map(user_info,
 229                                     smb_name, client_domain,
 230                                     wksta_name,
 231                                     lm_pwd_len ? &lm_blob : NULL,
 232                                     nt_pwd_len ? &nt_blob : NULL,
 233                                     NULL, NULL, NULL,
 234                                     True);
 235
 236         if (NT_STATUS_IS_OK(status)) {
 237                 (*user_info)->logon_parameters = logon_parameters;
 238         }
 239         ret = NT_STATUS_IS_OK(status) ? True : False;
 240
 241         data_blob_free(&lm_blob);
 242         data_blob_free(&nt_blob);
 243         return ret;
 244 }
 245
 246 /****************************************************************************
 247  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 248  Decrypt and encrypt the passwords.
 249 ****************************************************************************/
 250
 251 bool make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 252                                          const char *smb_name,
 253                                          const char *client_domain,
 254                                          const char *wksta_name,
 255                                          uint32 logon_parameters,
 256                                          const uchar chal[8],
 257                                          const uchar lm_interactive_pwd[16],
 258                                          const uchar nt_interactive_pwd[16],
 259                                          const uchar *dc_sess_key)
 260 {
 261         unsigned char lm_pwd[16];
 262         unsigned char nt_pwd[16];
 263         unsigned char local_lm_response[24];
 264         unsigned char local_nt_response[24];
 265         unsigned char key[16];
 266
 267         ZERO_STRUCT(key);
 268         memcpy(key, dc_sess_key, 8);
 269
 270         if (lm_interactive_pwd)
 271                 memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 272
 273         if (nt_interactive_pwd)
 274                 memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 275
 276 #ifdef DEBUG_PASSWORD
 277         DEBUG(100,("key:"));
 278         dump_data(100, key, sizeof(key));
 279
 280         DEBUG(100,("lm owf password:"));
 281         dump_data(100, lm_pwd, sizeof(lm_pwd));
 282
 283         DEBUG(100,("nt owf password:"));
 284         dump_data(100, nt_pwd, sizeof(nt_pwd));
 285 #endif
 286
 287         if (lm_interactive_pwd)
 288                 SamOEMhash(lm_pwd, key, sizeof(lm_pwd));
 289
 290         if (nt_interactive_pwd)
 291                 SamOEMhash(nt_pwd, key, sizeof(nt_pwd));
 292
 293 #ifdef DEBUG_PASSWORD
 294         DEBUG(100,("decrypt of lm owf password:"));
 295         dump_data(100, lm_pwd, sizeof(lm_pwd));
 296
 297         DEBUG(100,("decrypt of nt owf password:"));
 298         dump_data(100, nt_pwd, sizeof(nt_pwd));
 299 #endif
 300
 301         if (lm_interactive_pwd)
 302                 SMBOWFencrypt(lm_pwd, chal,
 303                               local_lm_response);
 304
 305         if (nt_interactive_pwd)
 306                 SMBOWFencrypt(nt_pwd, chal,
 307                               local_nt_response);
 308
 309         /* Password info paranoia */
 310         ZERO_STRUCT(key);
 311
 312         {
 313                 bool ret;
 314                 NTSTATUS nt_status;
 315                 DATA_BLOB local_lm_blob;
 316                 DATA_BLOB local_nt_blob;
 317
 318                 DATA_BLOB lm_interactive_blob;
 319                 DATA_BLOB nt_interactive_blob;
 320
 321                 if (lm_interactive_pwd) {
 322                         local_lm_blob = data_blob(local_lm_response,
 323                                                   sizeof(local_lm_response));
 324                         lm_interactive_blob = data_blob(lm_pwd,
 325                                                         sizeof(lm_pwd));
 326                         ZERO_STRUCT(lm_pwd);
 327                 }
 328
 329                 if (nt_interactive_pwd) {
 330                         local_nt_blob = data_blob(local_nt_response,
 331                                                   sizeof(local_nt_response));
 332                         nt_interactive_blob = data_blob(nt_pwd,
 333                                                         sizeof(nt_pwd));
 334                         ZERO_STRUCT(nt_pwd);
 335                 }
 336
 337                 nt_status = make_user_info_map(
 338                         user_info,
 339                         smb_name, client_domain, wksta_name,
 340                         lm_interactive_pwd ? &local_lm_blob : NULL,
 341                         nt_interactive_pwd ? &local_nt_blob : NULL,
 342                         lm_interactive_pwd ? &lm_interactive_blob : NULL,
 343                         nt_interactive_pwd ? &nt_interactive_blob : NULL,
 344                         NULL, True);
 345
 346                 if (NT_STATUS_IS_OK(nt_status)) {
 347                         (*user_info)->logon_parameters = logon_parameters;
 348                 }
 349
 350                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 351                 data_blob_free(&local_lm_blob);
 352                 data_blob_free(&local_nt_blob);
 353                 data_blob_free(&lm_interactive_blob);
 354                 data_blob_free(&nt_interactive_blob);
 355                 return ret;
 356         }
 357 }
 358
 359
 360 /****************************************************************************
 361  Create an auth_usersupplied_data structure
 362 ****************************************************************************/
 363
 364 bool make_user_info_for_reply(auth_usersupplied_info **user_info,
 365                               const char *smb_name,
 366                               const char *client_domain,
 367                               const uint8 chal[8],
 368                               DATA_BLOB plaintext_password)
 369 {
 370
 371         DATA_BLOB local_lm_blob;
 372         DATA_BLOB local_nt_blob;
 373         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 374
 375         /*
 376          * Not encrypted - do so.
 377          */
 378
 379         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
 380                  "format.\n"));
 381
 382         if (plaintext_password.data) {
 383                 unsigned char local_lm_response[24];
 384
 385 #ifdef DEBUG_PASSWORD
 386                 DEBUG(10,("Unencrypted password (len %d):\n",
 387                           (int)plaintext_password.length));
 388                 dump_data(100, plaintext_password.data,
 389                           plaintext_password.length);
 390 #endif
 391
 392                 SMBencrypt( (const char *)plaintext_password.data,
 393                             (const uchar*)chal, local_lm_response);
 394                 local_lm_blob = data_blob(local_lm_response, 24);
 395
 396                 /* We can't do an NT hash here, as the password needs to be
 397                    case insensitive */
 398                 local_nt_blob = data_blob_null;
 399
 400         } else {
 401                 local_lm_blob = data_blob_null;
 402                 local_nt_blob = data_blob_null;
 403         }
 404
 405         ret = make_user_info_map(
 406                 user_info, smb_name, client_domain,
 407                 get_remote_machine_name(),
 408                 local_lm_blob.data ? &local_lm_blob : NULL,
 409                 local_nt_blob.data ? &local_nt_blob : NULL,
 410                 NULL, NULL,
 411                 plaintext_password.data ? &plaintext_password : NULL,
 412                 False);
 413
 414         data_blob_free(&local_lm_blob);
 415         return NT_STATUS_IS_OK(ret) ? True : False;
 416 }
 417
 418 /****************************************************************************
 419  Create an auth_usersupplied_data structure
 420 ****************************************************************************/
 421
 422 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 423                                       const char *smb_name,
 424                                       const char *client_domain,
 425                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 426 {
 427         return make_user_info_map(user_info, smb_name,
 428                                   client_domain,
 429                                   get_remote_machine_name(),
 430                                   lm_resp.data ? &lm_resp : NULL,
 431                                   nt_resp.data ? &nt_resp : NULL,
 432                                   NULL, NULL, NULL,
 433                                   True);
 434 }
 435
 436 /****************************************************************************
 437  Create a guest user_info blob, for anonymous authenticaion.
 438 ****************************************************************************/
 439
 440 bool make_user_info_guest(auth_usersupplied_info **user_info)
 441 {
 442         NTSTATUS nt_status;
 443
 444         nt_status = make_user_info(user_info,
 445                                    "","",
 446                                    "","",
 447                                    "",
 448                                    NULL, NULL,
 449                                    NULL, NULL,
 450                                    NULL,
 451                                    True);
 452
 453         return NT_STATUS_IS_OK(nt_status) ? True : False;
 454 }
 455
 456 static int server_info_dtor(auth_serversupplied_info *server_info)
 457 {
 458         TALLOC_FREE(server_info->sam_account);
 459         ZERO_STRUCTP(server_info);
 460         return 0;
 461 }
 462
 463 /***************************************************************************
 464  Make a server_info struct. Free with TALLOC_FREE().
 465 ***************************************************************************/
 466
 467 static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
 468 {
 469         struct auth_serversupplied_info *result;
 470
 471         result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
 472         if (result == NULL) {
 473                 DEBUG(0, ("talloc failed\n"));
 474                 return NULL;
 475         }
 476
 477         talloc_set_destructor(result, server_info_dtor);
 478
 479         /* Initialise the uid and gid values to something non-zero
 480            which may save us from giving away root access if there
 481            is a bug in allocating these fields. */
 482
 483         result->utok.uid = -1;
 484         result->utok.gid = -1;
 485         return result;
 486 }
 487
 488 static char *sanitize_username(TALLOC_CTX *mem_ctx, const char *username)
 489 {
 490         fstring tmp;
 491
 492         alpha_strcpy(tmp, username, ". _-$", sizeof(tmp));
 493         return talloc_strdup(mem_ctx, tmp);
 494 }
 495
 496 /***************************************************************************
 497  Make (and fill) a user_info struct from a struct samu
 498 ***************************************************************************/
 499
 500 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 501                               struct samu *sampass)
 502 {
 503         NTSTATUS status;
 504         struct passwd *pwd;
 505         gid_t *gids;
 506         auth_serversupplied_info *result;
 507         int i;
 508         size_t num_gids;
 509         DOM_SID unix_group_sid;
 510
 511
 512         if ( !(result = make_server_info(NULL)) ) {
 513                 return NT_STATUS_NO_MEMORY;
 514         }
 515
 516         if ( !(pwd = getpwnam_alloc(result, pdb_get_username(sampass))) ) {
 517                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
 518                           pdb_get_username(sampass)));
 519                 TALLOC_FREE(result);
 520                 return NT_STATUS_NO_SUCH_USER;
 521         }
 522
 523         result->sam_account = sampass;
 524         /* Ensure thaat the sampass will be freed with the result */
 525         talloc_steal(result, sampass);
 526         result->unix_name = pwd->pw_name;
 527         /* Ensure that we keep pwd->pw_name, because we will free pwd below */
 528         talloc_steal(result, pwd->pw_name);
 529         result->utok.gid = pwd->pw_gid;
 530         result->utok.uid = pwd->pw_uid;
 531
 532         TALLOC_FREE(pwd);
 533
 534         result->sanitized_username = sanitize_username(result,
 535                                                        result->unix_name);
 536         if (result->sanitized_username == NULL) {
 537                 TALLOC_FREE(result);
 538                 return NT_STATUS_NO_MEMORY;
 539         }
 540
 541         status = pdb_enum_group_memberships(result, sampass,
 542                                             &result->sids, &gids,
 543                                             &result->num_sids);
 544
 545         if (!NT_STATUS_IS_OK(status)) {
 546                 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
 547                            nt_errstr(status)));
 548                 result->sam_account = NULL; /* Don't free on error exit. */
 549                 TALLOC_FREE(result);
 550                 return status;
 551         }
 552
 553         /* Add the "Unix Group" SID for each gid to catch mapped groups
 554            and their Unix equivalent.  This is to solve the backwards
 555            compatibility problem of 'valid users = +ntadmin' where
 556            ntadmin has been paired with "Domain Admins" in the group
 557            mapping table.  Otherwise smb.conf would need to be changed
 558            to 'valid user = "Domain Admins"'.  --jerry */
 559
 560         num_gids = result->num_sids;
 561         for ( i=0; i<num_gids; i++ ) {
 562                 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
 563                         DEBUG(1,("make_server_info_sam: Failed to create SID "
 564                                 "for gid %d!\n", gids[i]));
 565                         continue;
 566                 }
 567                 status = add_sid_to_array_unique(result, &unix_group_sid,
 568                                                  &result->sids,
 569                                                  &result->num_sids);
 570                 if (!NT_STATUS_IS_OK(status)) {
 571                         result->sam_account = NULL; /* Don't free on error exit. */
 572                         TALLOC_FREE(result);
 573                         return status;
 574                 }
 575         }
 576
 577         /* For now we throw away the gids and convert via sid_to_gid
 578          * later. This needs fixing, but I'd like to get the code straight and
 579          * simple first. */
 580
 581         TALLOC_FREE(gids);
 582
 583         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
 584                  pdb_get_username(sampass), result->unix_name));
 585
 586         *server_info = result;
 587
 588         return NT_STATUS_OK;
 589 }
 590
 591 static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
 592 {
 593         char *command;
 594         char *group_sidstr;
 595         size_t i;
 596
 597         if ((lp_log_nt_token_command() == NULL) ||
 598             (strlen(lp_log_nt_token_command()) == 0)) {
 599                 return NT_STATUS_OK;
 600         }
 601
 602         group_sidstr = talloc_strdup(tmp_ctx, "");
 603         for (i=1; i<token->num_sids; i++) {
 604                 group_sidstr = talloc_asprintf(
 605                         tmp_ctx, "%s %s", group_sidstr,
 606                         sid_string_talloc(tmp_ctx, &token->user_sids[i]));
 607         }
 608
 609         command = talloc_string_sub(
 610                 tmp_ctx, lp_log_nt_token_command(),
 611                 "%s", sid_string_talloc(tmp_ctx, &token->user_sids[0]));
 612         command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
 613
 614         if (command == NULL) {
 615                 return NT_STATUS_NO_MEMORY;
 616         }
 617
 618         DEBUG(8, ("running command: [%s]\n", command));
 619         if (smbrun(command, NULL) != 0) {
 620                 DEBUG(0, ("Could not log NT token\n"));
 621                 return NT_STATUS_ACCESS_DENIED;
 622         }
 623
 624         return NT_STATUS_OK;
 625 }
 626
 627 /*
 628  * Create the token to use from server_info->sam_account and
 629  * server_info->sids (the info3/sam groups). Find the unix gids.
 630  */
 631
 632 NTSTATUS create_local_token(auth_serversupplied_info *server_info)
 633 {
 634         TALLOC_CTX *mem_ctx;
 635         NTSTATUS status;
 636         size_t i;
 637
 638
 639         mem_ctx = talloc_new(NULL);
 640         if (mem_ctx == NULL) {
 641                 DEBUG(0, ("talloc_new failed\n"));
 642                 return NT_STATUS_NO_MEMORY;
 643         }
 644
 645         /*
 646          * If winbind is not around, we can not make much use of the SIDs the
 647          * domain controller provided us with. Likewise if the user name was
 648          * mapped to some local unix user.
 649          */
 650
 651         if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) ||
 652             (server_info->nss_token)) {
 653                 status = create_token_from_username(server_info,
 654                                                     server_info->unix_name,
 655                                                     server_info->guest,
 656                                                     &server_info->utok.uid,
 657                                                     &server_info->utok.gid,
 658                                                     &server_info->unix_name,
 659                                                     &server_info->ptok);
 660
 661         } else {
 662                 server_info->ptok = create_local_nt_token(
 663                         server_info,
 664                         pdb_get_user_sid(server_info->sam_account),
 665                         server_info->guest,
 666                         server_info->num_sids, server_info->sids);
 667                 status = server_info->ptok ?
 668                         NT_STATUS_OK : NT_STATUS_NO_SUCH_USER;
 669         }
 670
 671         if (!NT_STATUS_IS_OK(status)) {
 672                 TALLOC_FREE(mem_ctx);
 673                 return status;
 674         }
 675
 676         /* Convert the SIDs to gids. */
 677
 678         server_info->utok.ngroups = 0;
 679         server_info->utok.groups = NULL;
 680
 681         /* Start at index 1, where the groups start. */
 682
 683         for (i=1; i<server_info->ptok->num_sids; i++) {
 684                 gid_t gid;
 685                 DOM_SID *sid = &server_info->ptok->user_sids[i];
 686
 687                 if (!sid_to_gid(sid, &gid)) {
 688                         DEBUG(10, ("Could not convert SID %s to gid, "
 689                                    "ignoring it\n", sid_string_dbg(sid)));
 690                         continue;
 691                 }
 692                 add_gid_to_array_unique(server_info, gid,
 693                                         &server_info->utok.groups,
 694                                         &server_info->utok.ngroups);
 695         }
 696
 697         debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
 698
 699         status = log_nt_token(mem_ctx, server_info->ptok);
 700
 701         TALLOC_FREE(mem_ctx);
 702         return status;
 703 }
 704
 705 /*
 706  * Create an artificial NT token given just a username. (Initially indended
 707  * for force user)
 708  *
 709  * We go through lookup_name() to avoid problems we had with 'winbind use
 710  * default domain'.
 711  *
 712  * We have 3 cases:
 713  *
 714  * unmapped unix users: Go directly to nss to find the user's group.
 715  *
 716  * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
 717  *
 718  * If the user is provided by winbind, the primary gid is set to "domain
 719  * users" of the user's domain. For an explanation why this is necessary, see
 720  * the thread starting at
 721  * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
 722  */
 723
 724 NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
 725                                     bool is_guest,
 726                                     uid_t *uid, gid_t *gid,
 727                                     char **found_username,
 728                                     struct nt_user_token **token)
 729 {
 730         NTSTATUS result = NT_STATUS_NO_SUCH_USER;
 731         TALLOC_CTX *tmp_ctx;
 732         DOM_SID user_sid;
 733         enum lsa_SidType type;
 734         gid_t *gids;
 735         DOM_SID *group_sids;
 736         DOM_SID unix_group_sid;
 737         size_t num_group_sids;
 738         size_t num_gids;
 739         size_t i;
 740
 741         tmp_ctx = talloc_new(NULL);
 742         if (tmp_ctx == NULL) {
 743                 DEBUG(0, ("talloc_new failed\n"));
 744                 return NT_STATUS_NO_MEMORY;
 745         }
 746
 747         if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
 748                          NULL, NULL, &user_sid, &type)) {
 749                 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
 750                 goto done;
 751         }
 752
 753         if (type != SID_NAME_USER) {
 754                 DEBUG(1, ("%s is a %s, not a user\n", username,
 755                           sid_type_lookup(type)));
 756                 goto done;
 757         }
 758
 759         if (!sid_to_uid(&user_sid, uid)) {
 760                 DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
 761                           username, sid_string_dbg(&user_sid)));
 762                 goto done;
 763         }
 764
 765         if (sid_check_is_in_our_domain(&user_sid)) {
 766                 bool ret;
 767
 768                 /* This is a passdb user, so ask passdb */
 769
 770                 struct samu *sam_acct = NULL;
 771
 772                 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
 773                         result = NT_STATUS_NO_MEMORY;
 774                         goto done;
 775                 }
 776
 777                 become_root();
 778                 ret = pdb_getsampwsid(sam_acct, &user_sid);
 779                 unbecome_root();
 780
 781                 if (!ret) {
 782                         DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
 783                                   sid_string_dbg(&user_sid), username));
 784                         DEBUGADD(1, ("Fall back to unix user %s\n", username));
 785                         goto unix_user;
 786                 }
 787
 788                 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
 789                                                     &group_sids, &gids,
 790                                                     &num_group_sids);
 791                 if (!NT_STATUS_IS_OK(result)) {
 792                         DEBUG(10, ("enum_group_memberships failed for %s\n",
 793                                    username));
 794                         DEBUGADD(1, ("Fall back to unix user %s\n", username));
 795                         goto unix_user;
 796                 }
 797
 798                 /* see the smb_panic() in pdb_default_enum_group_memberships */
 799                 SMB_ASSERT(num_group_sids > 0);
 800
 801                 *gid = gids[0];
 802
 803                 /* Ensure we're returning the found_username on the right context. */
 804                 *found_username = talloc_strdup(mem_ctx,
 805                                                 pdb_get_username(sam_acct));
 806
 807         } else  if (sid_check_is_in_unix_users(&user_sid)) {
 808
 809                 /* This is a unix user not in passdb. We need to ask nss
 810                  * directly, without consulting passdb */
 811
 812                 struct passwd *pass;
 813
 814                 /*
 815                  * This goto target is used as a fallback for the passdb
 816                  * case. The concrete bug report is when passdb gave us an
 817                  * unmapped gid.
 818                  */
 819
 820         unix_user:
 821
 822                 uid_to_unix_users_sid(*uid, &user_sid);
 823
 824                 pass = getpwuid_alloc(tmp_ctx, *uid);
 825                 if (pass == NULL) {
 826                         DEBUG(1, ("getpwuid(%d) for user %s failed\n",
 827                                   *uid, username));
 828                         goto done;
 829                 }
 830
 831                 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
 832                                          &gids, &num_group_sids)) {
 833                         DEBUG(1, ("getgroups_unix_user for user %s failed\n",
 834                                   username));
 835                         goto done;
 836                 }
 837
 838                 if (num_group_sids) {
 839                         group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids);
 840                         if (group_sids == NULL) {
 841                                 DEBUG(1, ("TALLOC_ARRAY failed\n"));
 842                                 result = NT_STATUS_NO_MEMORY;
 843                                 goto done;
 844                         }
 845                 } else {
 846                         group_sids = NULL;
 847                 }
 848
 849                 for (i=0; i<num_group_sids; i++) {
 850                         gid_to_sid(&group_sids[i], gids[i]);
 851                 }
 852
 853                 /* In getgroups_unix_user we always set the primary gid */
 854                 SMB_ASSERT(num_group_sids > 0);
 855
 856                 *gid = gids[0];
 857
 858                 /* Ensure we're returning the found_username on the right context. */
 859                 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
 860         } else {
 861
 862                 /* This user is from winbind, force the primary gid to the
 863                  * user's "domain users" group. Under certain circumstances
 864                  * (user comes from NT4), this might be a loss of
 865                  * information. But we can not rely on winbind getting the
 866                  * correct info. AD might prohibit winbind looking up that
 867                  * information. */
 868
 869                 uint32 dummy;
 870
 871                 num_group_sids = 1;
 872                 group_sids = TALLOC_ARRAY(tmp_ctx, DOM_SID, num_group_sids);
 873                 if (group_sids == NULL) {
 874                         DEBUG(1, ("TALLOC_ARRAY failed\n"));
 875                         result = NT_STATUS_NO_MEMORY;
 876                         goto done;
 877                 }
 878
 879                 sid_copy(&group_sids[0], &user_sid);
 880                 sid_split_rid(&group_sids[0], &dummy);
 881                 sid_append_rid(&group_sids[0], DOMAIN_GROUP_RID_USERS);
 882
 883                 if (!sid_to_gid(&group_sids[0], gid)) {
 884                         DEBUG(1, ("sid_to_gid(%s) failed\n",
 885                                   sid_string_dbg(&group_sids[0])));
 886                         goto done;
 887                 }
 888
 889                 gids = gid;
 890
 891                 /* Ensure we're returning the found_username on the right context. */
 892                 *found_username = talloc_strdup(mem_ctx, username);
 893         }
 894
 895         /* Add the "Unix Group" SID for each gid to catch mapped groups
 896            and their Unix equivalent.  This is to solve the backwards
 897            compatibility problem of 'valid users = +ntadmin' where
 898            ntadmin has been paired with "Domain Admins" in the group
 899            mapping table.  Otherwise smb.conf would need to be changed
 900            to 'valid user = "Domain Admins"'.  --jerry */
 901
 902         num_gids = num_group_sids;
 903         for ( i=0; i<num_gids; i++ ) {
 904                 gid_t high, low;
 905
 906                 /* don't pickup anything managed by Winbind */
 907
 908                 if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
 909                         continue;
 910
 911                 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
 912                         DEBUG(1,("create_token_from_username: Failed to create SID "
 913                                 "for gid %d!\n", gids[i]));
 914                         continue;
 915                 }
 916                 result = add_sid_to_array_unique(tmp_ctx, &unix_group_sid,
 917                                                  &group_sids, &num_group_sids);
 918                 if (!NT_STATUS_IS_OK(result)) {
 919                         goto done;
 920                 }
 921         }
 922
 923         /* Ensure we're creating the nt_token on the right context. */
 924         *token = create_local_nt_token(mem_ctx, &user_sid,
 925                                        is_guest, num_group_sids, group_sids);
 926
 927         if ((*token == NULL) || (*found_username == NULL)) {
 928                 result = NT_STATUS_NO_MEMORY;
 929                 goto done;
 930         }
 931
 932         result = NT_STATUS_OK;
 933  done:
 934         TALLOC_FREE(tmp_ctx);
 935         return result;
 936 }
 937
 938 /***************************************************************************
 939  Build upon create_token_from_username:
 940
 941  Expensive helper function to figure out whether a user given its name is
 942  member of a particular group.
 943 ***************************************************************************/
 944
 945 bool user_in_group_sid(const char *username, const DOM_SID *group_sid)
 946 {
 947         NTSTATUS status;
 948         uid_t uid;
 949         gid_t gid;
 950         char *found_username;
 951         struct nt_user_token *token;
 952         bool result;
 953
 954         TALLOC_CTX *mem_ctx;
 955
 956         mem_ctx = talloc_new(NULL);
 957         if (mem_ctx == NULL) {
 958                 DEBUG(0, ("talloc_new failed\n"));
 959                 return False;
 960         }
 961
 962         status = create_token_from_username(mem_ctx, username, False,
 963                                             &uid, &gid, &found_username,
 964                                             &token);
 965
 966         if (!NT_STATUS_IS_OK(status)) {
 967                 DEBUG(10, ("could not create token for %s\n", username));
 968                 return False;
 969         }
 970
 971         result = nt_token_check_sid(group_sid, token);
 972
 973         TALLOC_FREE(mem_ctx);
 974         return result;
 975
 976 }
 977
 978 bool user_in_group(const char *username, const char *groupname)
 979 {
 980         TALLOC_CTX *mem_ctx;
 981         DOM_SID group_sid;
 982         bool ret;
 983
 984         mem_ctx = talloc_new(NULL);
 985         if (mem_ctx == NULL) {
 986                 DEBUG(0, ("talloc_new failed\n"));
 987                 return False;
 988         }
 989
 990         ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
 991                           NULL, NULL, &group_sid, NULL);
 992         TALLOC_FREE(mem_ctx);
 993
 994         if (!ret) {
 995                 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
 996                 return False;
 997         }
 998
 999         return user_in_group_sid(username, &group_sid);
1000 }
1001
1002 /***************************************************************************
1003  Make (and fill) a server_info struct from a 'struct passwd' by conversion
1004  to a struct samu
1005 ***************************************************************************/
1006
1007 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
1008                              char *unix_username,
1009                              struct passwd *pwd)
1010 {
1011         NTSTATUS status;
1012         struct samu *sampass = NULL;
1013         gid_t *gids;
1014         char *qualified_name = NULL;
1015         TALLOC_CTX *mem_ctx = NULL;
1016         DOM_SID u_sid;
1017         enum lsa_SidType type;
1018         auth_serversupplied_info *result;
1019
1020         if ( !(sampass = samu_new( NULL )) ) {
1021                 return NT_STATUS_NO_MEMORY;
1022         }
1023
1024         status = samu_set_unix( sampass, pwd );
1025         if (!NT_STATUS_IS_OK(status)) {
1026                 return status;
1027         }
1028
1029         result = make_server_info(NULL);
1030         if (result == NULL) {
1031                 TALLOC_FREE(sampass);
1032                 return NT_STATUS_NO_MEMORY;
1033         }
1034
1035         result->sam_account = sampass;
1036
1037         result->unix_name = talloc_strdup(result, unix_username);
1038         result->sanitized_username = sanitize_username(result, unix_username);
1039
1040         if ((result->unix_name == NULL)
1041             || (result->sanitized_username == NULL)) {
1042                 TALLOC_FREE(sampass);
1043                 TALLOC_FREE(result);
1044                 return NT_STATUS_NO_MEMORY;
1045         }
1046
1047         result->utok.uid = pwd->pw_uid;
1048         result->utok.gid = pwd->pw_gid;
1049
1050         status = pdb_enum_group_memberships(result, sampass,
1051                                             &result->sids, &gids,
1052                                             &result->num_sids);
1053
1054         if (!NT_STATUS_IS_OK(status)) {
1055                 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
1056                            nt_errstr(status)));
1057                 TALLOC_FREE(result);
1058                 return status;
1059         }
1060
1061         /*
1062          * The SID returned in server_info->sam_account is based
1063          * on our SAM sid even though for a pure UNIX account this should
1064          * not be the case as it doesn't really exist in the SAM db.
1065          * This causes lookups on "[in]valid users" to fail as they
1066          * will lookup this name as a "Unix User" SID to check against
1067          * the user token. Fix this by adding the "Unix User"\unix_username
1068          * SID to the sid array. The correct fix should probably be
1069          * changing the server_info->sam_account user SID to be a
1070          * S-1-22 Unix SID, but this might break old configs where
1071          * plaintext passwords were used with no SAM backend.
1072          */
1073
1074         mem_ctx = talloc_init("make_server_info_pw_tmp");
1075         if (!mem_ctx) {
1076                 TALLOC_FREE(result);
1077                 return NT_STATUS_NO_MEMORY;
1078         }
1079
1080         qualified_name = talloc_asprintf(mem_ctx, "%s\\%s",
1081                                         unix_users_domain_name(),
1082                                         unix_username );
1083         if (!qualified_name) {
1084                 TALLOC_FREE(result);
1085                 TALLOC_FREE(mem_ctx);
1086                 return NT_STATUS_NO_MEMORY;
1087         }
1088
1089         if (!lookup_name(mem_ctx, qualified_name, LOOKUP_NAME_ALL,
1090                                                 NULL, NULL,
1091                                                 &u_sid, &type)) {
1092                 TALLOC_FREE(result);
1093                 TALLOC_FREE(mem_ctx);
1094                 return NT_STATUS_NO_SUCH_USER;
1095         }
1096
1097         TALLOC_FREE(mem_ctx);
1098
1099         if (type != SID_NAME_USER) {
1100                 TALLOC_FREE(result);
1101                 return NT_STATUS_NO_SUCH_USER;
1102         }
1103
1104         status = add_sid_to_array_unique(result, &u_sid,
1105                                          &result->sids,
1106                                          &result->num_sids);
1107         if (!NT_STATUS_IS_OK(status)) {
1108                 TALLOC_FREE(result);
1109                 return status;
1110         }
1111
1112         /* For now we throw away the gids and convert via sid_to_gid
1113          * later. This needs fixing, but I'd like to get the code straight and
1114          * simple first. */
1115         TALLOC_FREE(gids);
1116
1117         *server_info = result;
1118
1119         return NT_STATUS_OK;
1120 }
1121
1122 /***************************************************************************
1123  Make (and fill) a user_info struct for a guest login.
1124  This *must* succeed for smbd to start. If there is no mapping entry for
1125  the guest gid, then create one.
1126 ***************************************************************************/
1127
1128 static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
1129 {
1130         NTSTATUS status;
1131         struct samu *sampass = NULL;
1132         DOM_SID guest_sid;
1133         bool ret;
1134         char zeros[16];
1135         fstring tmp;
1136
1137         if ( !(sampass = samu_new( NULL )) ) {
1138                 return NT_STATUS_NO_MEMORY;
1139         }
1140
1141         sid_copy(&guest_sid, get_global_sam_sid());
1142         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
1143
1144         become_root();
1145         ret = pdb_getsampwsid(sampass, &guest_sid);
1146         unbecome_root();
1147
1148         if (!ret) {
1149                 TALLOC_FREE(sampass);
1150                 return NT_STATUS_NO_SUCH_USER;
1151         }
1152
1153         status = make_server_info_sam(server_info, sampass);
1154         if (!NT_STATUS_IS_OK(status)) {
1155                 TALLOC_FREE(sampass);
1156                 return status;
1157         }
1158
1159         (*server_info)->guest = True;
1160
1161         status = create_local_token(*server_info);
1162         if (!NT_STATUS_IS_OK(status)) {
1163                 DEBUG(10, ("create_local_token failed: %s\n",
1164                            nt_errstr(status)));
1165                 return status;
1166         }
1167
1168         /* annoying, but the Guest really does have a session key, and it is
1169            all zeros! */
1170         ZERO_STRUCT(zeros);
1171         (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
1172         (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
1173
1174         alpha_strcpy(tmp, pdb_get_username(sampass), ". _-$", sizeof(tmp));
1175         (*server_info)->sanitized_username = talloc_strdup(*server_info, tmp);
1176
1177         return NT_STATUS_OK;
1178 }
1179
1180 /****************************************************************************
1181   Fake a auth_serversupplied_info just from a username
1182 ****************************************************************************/
1183
1184 NTSTATUS make_serverinfo_from_username(TALLOC_CTX *mem_ctx,
1185                                        const char *username,
1186                                        bool is_guest,
1187                                        struct auth_serversupplied_info **presult)
1188 {
1189         struct auth_serversupplied_info *result;
1190         struct passwd *pwd;
1191         NTSTATUS status;
1192
1193         pwd = getpwnam_alloc(talloc_tos(), username);
1194         if (pwd == NULL) {
1195                 return NT_STATUS_NO_SUCH_USER;
1196         }
1197
1198         status = make_server_info_pw(&result, pwd->pw_name, pwd);
1199
1200         TALLOC_FREE(pwd);
1201
1202         if (!NT_STATUS_IS_OK(status)) {
1203                 return status;
1204         }
1205
1206         result->nss_token = true;
1207         result->guest = is_guest;
1208
1209         status = create_local_token(result);
1210
1211         if (!NT_STATUS_IS_OK(status)) {
1212                 TALLOC_FREE(result);
1213                 return status;
1214         }
1215
1216         *presult = result;
1217         return NT_STATUS_OK;
1218 }
1219
1220
1221 struct auth_serversupplied_info *copy_serverinfo(TALLOC_CTX *mem_ctx,
1222                                                  auth_serversupplied_info *src)
1223 {
1224         auth_serversupplied_info *dst;
1225
1226         dst = make_server_info(mem_ctx);
1227         if (dst == NULL) {
1228                 return NULL;
1229         }
1230
1231         dst->guest = src->guest;
1232         dst->utok.uid = src->utok.uid;
1233         dst->utok.gid = src->utok.gid;
1234         dst->utok.ngroups = src->utok.ngroups;
1235         if (src->utok.ngroups != 0) {
1236                 dst->utok.groups = (gid_t *)TALLOC_MEMDUP(
1237                         dst, src->utok.groups,
1238                         sizeof(gid_t)*dst->utok.ngroups);
1239         } else {
1240                 dst->utok.groups = NULL;
1241         }
1242
1243         if (src->ptok) {
1244                 dst->ptok = dup_nt_token(dst, src->ptok);
1245                 if (!dst->ptok) {
1246                         TALLOC_FREE(dst);
1247                         return NULL;
1248                 }
1249         }
1250
1251         dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
1252                                                 src->user_session_key.length);
1253
1254         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1255                                                 src->lm_session_key.length);
1256
1257         dst->sam_account = samu_new(NULL);
1258         if (!dst->sam_account) {
1259                 TALLOC_FREE(dst);
1260                 return NULL;
1261         }
1262
1263         if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) {
1264                 TALLOC_FREE(dst);
1265                 return NULL;
1266         }
1267
1268         dst->pam_handle = NULL;
1269         dst->unix_name = talloc_strdup(dst, src->unix_name);
1270         if (!dst->unix_name) {
1271                 TALLOC_FREE(dst);
1272                 return NULL;
1273         }
1274
1275         dst->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1276         if (!dst->sanitized_username) {
1277                 TALLOC_FREE(dst);
1278                 return NULL;
1279         }
1280
1281         return dst;
1282 }
1283
1284 static auth_serversupplied_info *guest_info = NULL;
1285
1286 bool init_guest_info(void)
1287 {
1288         if (guest_info != NULL)
1289                 return True;
1290
1291         return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
1292 }
1293
1294 NTSTATUS make_server_info_guest(TALLOC_CTX *mem_ctx,
1295                                 auth_serversupplied_info **server_info)
1296 {
1297         *server_info = copy_serverinfo(mem_ctx, guest_info);
1298         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1299 }
1300
1301 bool copy_current_user(struct current_user *dst, struct current_user *src)
1302 {
1303         gid_t *groups;
1304         NT_USER_TOKEN *nt_token;
1305
1306         groups = (gid_t *)memdup(src->ut.groups,
1307                                  sizeof(gid_t) * src->ut.ngroups);
1308         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1309                 return False;
1310         }
1311
1312         nt_token = dup_nt_token(NULL, src->nt_user_token);
1313         if (nt_token == NULL) {
1314                 SAFE_FREE(groups);
1315                 return False;
1316         }
1317
1318         dst->conn = src->conn;
1319         dst->vuid = src->vuid;
1320         dst->ut.uid = src->ut.uid;
1321         dst->ut.gid = src->ut.gid;
1322         dst->ut.ngroups = src->ut.ngroups;
1323         dst->ut.groups = groups;
1324         dst->nt_user_token = nt_token;
1325         return True;
1326 }
1327
1328 /***************************************************************************
1329  Purely internal function for make_server_info_info3
1330  Fill the sam account from getpwnam
1331 ***************************************************************************/
1332 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
1333                                  const char *domain,
1334                                  const char *username,
1335                                  char **found_username,
1336                                  uid_t *uid, gid_t *gid,
1337                                  struct samu *account,
1338                                  bool *username_was_mapped)
1339 {
1340         NTSTATUS nt_status;
1341         fstring dom_user, lower_username;
1342         fstring real_username;
1343         struct passwd *passwd;
1344
1345         fstrcpy( lower_username, username );
1346         strlower_m( lower_username );
1347
1348         fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
1349                 lower_username);
1350
1351         /* Get the passwd struct.  Try to create the account is necessary. */
1352
1353         *username_was_mapped = map_username( dom_user );
1354
1355         if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
1356                 return NT_STATUS_NO_SUCH_USER;
1357
1358         *uid = passwd->pw_uid;
1359         *gid = passwd->pw_gid;
1360
1361         /* This is pointless -- there is no suport for differing
1362            unix and windows names.  Make sure to always store the
1363            one we actually looked up and succeeded. Have I mentioned
1364            why I hate the 'winbind use default domain' parameter?
1365                                          --jerry              */
1366
1367         *found_username = talloc_strdup( mem_ctx, real_username );
1368
1369         DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
1370
1371         nt_status = samu_set_unix( account, passwd );
1372
1373         TALLOC_FREE(passwd);
1374
1375         return nt_status;
1376 }
1377
1378 /****************************************************************************
1379  Wrapper to allow the getpwnam() call to strip the domain name and
1380  try again in case a local UNIX user is already there.  Also run through
1381  the username if we fallback to the username only.
1382  ****************************************************************************/
1383
1384 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
1385                              fstring save_username, bool create )
1386 {
1387         struct passwd *pw = NULL;
1388         char *p;
1389         fstring username;
1390
1391         /* we only save a copy of the username it has been mangled
1392            by winbindd use default domain */
1393
1394         save_username[0] = '\0';
1395
1396         /* don't call map_username() here since it has to be done higher
1397            up the stack so we don't call it mutliple times */
1398
1399         fstrcpy( username, domuser );
1400
1401         p = strchr_m( username, *lp_winbind_separator() );
1402
1403         /* code for a DOMAIN\user string */
1404
1405         if ( p ) {
1406                 fstring strip_username;
1407
1408                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1409                 if ( pw ) {
1410                         /* make sure we get the case of the username correct */
1411                         /* work around 'winbind use default domain = yes' */
1412
1413                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1414                                 char *domain;
1415
1416                                 /* split the domain and username into 2 strings */
1417                                 *p = '\0';
1418                                 domain = username;
1419
1420                                 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1421                         }
1422                         else
1423                                 fstrcpy( save_username, pw->pw_name );
1424
1425                         /* whew -- done! */
1426                         return pw;
1427                 }
1428
1429                 /* setup for lookup of just the username */
1430                 /* remember that p and username are overlapping memory */
1431
1432                 p++;
1433                 fstrcpy( strip_username, p );
1434                 fstrcpy( username, strip_username );
1435         }
1436
1437         /* just lookup a plain username */
1438
1439         pw = Get_Pwnam_alloc(mem_ctx, username);
1440
1441         /* Create local user if requested but only if winbindd
1442            is not running.  We need to protect against cases
1443            where winbindd is failing and then prematurely
1444            creating users in /etc/passwd */
1445
1446         if ( !pw && create && !winbind_ping() ) {
1447                 /* Don't add a machine account. */
1448                 if (username[strlen(username)-1] == '$')
1449                         return NULL;
1450
1451                 smb_create_user(NULL, username, NULL);
1452                 pw = Get_Pwnam_alloc(mem_ctx, username);
1453         }
1454
1455         /* one last check for a valid passwd struct */
1456
1457         if ( pw )
1458                 fstrcpy( save_username, pw->pw_name );
1459
1460         return pw;
1461 }
1462
1463 /***************************************************************************
1464  Make a server_info struct from the info3 returned by a domain logon
1465 ***************************************************************************/
1466
1467 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1468                                 const char *sent_nt_username,
1469                                 const char *domain,
1470                                 auth_serversupplied_info **server_info,
1471                                 struct netr_SamInfo3 *info3)
1472 {
1473         char zeros[16];
1474
1475         NTSTATUS nt_status = NT_STATUS_OK;
1476         char *found_username = NULL;
1477         const char *nt_domain;
1478         const char *nt_username;
1479         struct samu *sam_account = NULL;
1480         DOM_SID user_sid;
1481         DOM_SID group_sid;
1482         bool username_was_mapped;
1483
1484         uid_t uid = (uid_t)-1;
1485         gid_t gid = (gid_t)-1;
1486
1487         auth_serversupplied_info *result;
1488
1489         /*
1490            Here is where we should check the list of
1491            trusted domains, and verify that the SID
1492            matches.
1493         */
1494
1495         sid_copy(&user_sid, info3->base.domain_sid);
1496         if (!sid_append_rid(&user_sid, info3->base.rid)) {
1497                 return NT_STATUS_INVALID_PARAMETER;
1498         }
1499
1500         sid_copy(&group_sid, info3->base.domain_sid);
1501         if (!sid_append_rid(&group_sid, info3->base.primary_gid)) {
1502                 return NT_STATUS_INVALID_PARAMETER;
1503         }
1504
1505         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
1506         if (!nt_username) {
1507                 /* If the server didn't give us one, just use the one we sent
1508                  * them */
1509                 nt_username = sent_nt_username;
1510         }
1511
1512         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
1513         if (!nt_domain) {
1514                 /* If the server didn't give us one, just use the one we sent
1515                  * them */
1516                 nt_domain = domain;
1517         }
1518
1519         /* try to fill the SAM account..  If getpwnam() fails, then try the
1520            add user script (2.2.x behavior).
1521
1522            We use the _unmapped_ username here in an attempt to provide
1523            consistent username mapping behavior between kerberos and NTLM[SSP]
1524            authentication in domain mode security.  I.E. Username mapping
1525            should be applied to the fully qualified username
1526            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1527            called map_username() unnecessarily in make_user_info_map() but
1528            that is how the current code is designed.  Making the change here
1529            is the least disruptive place.  -- jerry */
1530
1531         if ( !(sam_account = samu_new( NULL )) ) {
1532                 return NT_STATUS_NO_MEMORY;
1533         }
1534
1535         /* this call will try to create the user if necessary */
1536
1537         nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1538                                      &found_username, &uid, &gid, sam_account,
1539                                      &username_was_mapped);
1540
1541
1542         /* if we still don't have a valid unix account check for
1543           'map to guest = bad uid' */
1544
1545         if (!NT_STATUS_IS_OK(nt_status)) {
1546                 TALLOC_FREE( sam_account );
1547                 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1548                         make_server_info_guest(NULL, server_info);
1549                         return NT_STATUS_OK;
1550                 }
1551                 return nt_status;
1552         }
1553
1554         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1555                 TALLOC_FREE(sam_account);
1556                 return NT_STATUS_NO_MEMORY;
1557         }
1558
1559         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1560                 TALLOC_FREE(sam_account);
1561                 return NT_STATUS_NO_MEMORY;
1562         }
1563
1564         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1565                 TALLOC_FREE(sam_account);
1566                 return NT_STATUS_NO_MEMORY;
1567         }
1568
1569         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1570                 TALLOC_FREE(sam_account);
1571                 return NT_STATUS_UNSUCCESSFUL;
1572         }
1573
1574         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1575                 TALLOC_FREE(sam_account);
1576                 return NT_STATUS_UNSUCCESSFUL;
1577         }
1578
1579         if (!pdb_set_fullname(sam_account,
1580                               info3->base.full_name.string,
1581                               PDB_CHANGED)) {
1582                 TALLOC_FREE(sam_account);
1583                 return NT_STATUS_NO_MEMORY;
1584         }
1585
1586         if (!pdb_set_logon_script(sam_account,
1587                                   info3->base.logon_script.string,
1588                                   PDB_CHANGED)) {
1589                 TALLOC_FREE(sam_account);
1590                 return NT_STATUS_NO_MEMORY;
1591         }
1592
1593         if (!pdb_set_profile_path(sam_account,
1594                                   info3->base.profile_path.string,
1595                                   PDB_CHANGED)) {
1596                 TALLOC_FREE(sam_account);
1597                 return NT_STATUS_NO_MEMORY;
1598         }
1599
1600         if (!pdb_set_homedir(sam_account,
1601                              info3->base.home_directory.string,
1602                              PDB_CHANGED)) {
1603                 TALLOC_FREE(sam_account);
1604                 return NT_STATUS_NO_MEMORY;
1605         }
1606
1607         if (!pdb_set_dir_drive(sam_account,
1608                                info3->base.home_drive.string,
1609                                PDB_CHANGED)) {
1610                 TALLOC_FREE(sam_account);
1611                 return NT_STATUS_NO_MEMORY;
1612         }
1613
1614         if (!pdb_set_acct_ctrl(sam_account, info3->base.acct_flags, PDB_CHANGED)) {
1615                 TALLOC_FREE(sam_account);
1616                 return NT_STATUS_NO_MEMORY;
1617         }
1618
1619         if (!pdb_set_pass_last_set_time(
1620                     sam_account,
1621                     nt_time_to_unix(info3->base.last_password_change),
1622                     PDB_CHANGED)) {
1623                 TALLOC_FREE(sam_account);
1624                 return NT_STATUS_NO_MEMORY;
1625         }
1626
1627         if (!pdb_set_pass_can_change_time(
1628                     sam_account,
1629                     nt_time_to_unix(info3->base.allow_password_change),
1630                     PDB_CHANGED)) {
1631                 TALLOC_FREE(sam_account);
1632                 return NT_STATUS_NO_MEMORY;
1633         }
1634
1635         if (!pdb_set_pass_must_change_time(
1636                     sam_account,
1637                     nt_time_to_unix(info3->base.force_password_change),
1638                     PDB_CHANGED)) {
1639                 TALLOC_FREE(sam_account);
1640                 return NT_STATUS_NO_MEMORY;
1641         }
1642
1643         result = make_server_info(NULL);
1644         if (result == NULL) {
1645                 DEBUG(4, ("make_server_info failed!\n"));
1646                 TALLOC_FREE(sam_account);
1647                 return NT_STATUS_NO_MEMORY;
1648         }
1649
1650         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1651            valid struct samu) */
1652
1653         result->sam_account = sam_account;
1654         result->unix_name = talloc_strdup(result, found_username);
1655
1656         result->sanitized_username = sanitize_username(result,
1657                                                        result->unix_name);
1658         if (result->sanitized_username == NULL) {
1659                 TALLOC_FREE(result);
1660                 return NT_STATUS_NO_MEMORY;
1661         }
1662
1663         /* Fill in the unix info we found on the way */
1664
1665         result->utok.uid = uid;
1666         result->utok.gid = gid;
1667
1668         /* Create a 'combined' list of all SIDs we might want in the SD */
1669
1670         result->num_sids = 0;
1671         result->sids = NULL;
1672
1673         nt_status = sid_array_from_info3(result, info3,
1674                                          &result->sids,
1675                                          &result->num_sids,
1676                                          false, false);
1677         if (!NT_STATUS_IS_OK(nt_status)) {
1678                 TALLOC_FREE(result);
1679                 return nt_status;
1680         }
1681
1682         result->login_server = talloc_strdup(result,
1683                                              info3->base.logon_server.string);
1684
1685         /* ensure we are never given NULL session keys */
1686
1687         ZERO_STRUCT(zeros);
1688
1689         if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {
1690                 result->user_session_key = data_blob_null;
1691         } else {
1692                 result->user_session_key = data_blob_talloc(
1693                         result, info3->base.key.key,
1694                         sizeof(info3->base.key.key));
1695         }
1696
1697         if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) {
1698                 result->lm_session_key = data_blob_null;
1699         } else {
1700                 result->lm_session_key = data_blob_talloc(
1701                         result, info3->base.LMSessKey.key,
1702                         sizeof(info3->base.LMSessKey.key));
1703         }
1704
1705         result->nss_token |= username_was_mapped;
1706
1707         *server_info = result;
1708
1709         return NT_STATUS_OK;
1710 }
1711
1712 /*****************************************************************************
1713  Make a server_info struct from the wbcAuthUserInfo returned by a domain logon
1714 ******************************************************************************/
1715
1716 NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
1717                                           const char *sent_nt_username,
1718                                           const char *domain,
1719                                           const struct wbcAuthUserInfo *info,
1720                                           auth_serversupplied_info **server_info)
1721 {
1722         char zeros[16];
1723
1724         NTSTATUS nt_status = NT_STATUS_OK;
1725         char *found_username = NULL;
1726         const char *nt_domain;
1727         const char *nt_username;
1728         struct samu *sam_account = NULL;
1729         DOM_SID user_sid;
1730         DOM_SID group_sid;
1731         bool username_was_mapped;
1732         uint32_t i;
1733
1734         uid_t uid = (uid_t)-1;
1735         gid_t gid = (gid_t)-1;
1736
1737         auth_serversupplied_info *result;
1738
1739         result = make_server_info(NULL);
1740         if (result == NULL) {
1741                 DEBUG(4, ("make_server_info failed!\n"));
1742                 return NT_STATUS_NO_MEMORY;
1743         }
1744
1745         /*
1746            Here is where we should check the list of
1747            trusted domains, and verify that the SID
1748            matches.
1749         */
1750
1751         memcpy(&user_sid, &info->sids[0].sid, sizeof(user_sid));
1752         memcpy(&group_sid, &info->sids[1].sid, sizeof(group_sid));
1753
1754         if (info->account_name) {
1755                 nt_username = talloc_strdup(result, info->account_name);
1756         } else {
1757                 /* If the server didn't give us one, just use the one we sent
1758                  * them */
1759                 nt_username = talloc_strdup(result, sent_nt_username);
1760         }
1761         if (!nt_username) {
1762                 TALLOC_FREE(result);
1763                 return NT_STATUS_NO_MEMORY;
1764         }
1765
1766         if (info->domain_name) {
1767                 nt_domain = talloc_strdup(result, info->domain_name);
1768         } else {
1769                 /* If the server didn't give us one, just use the one we sent
1770                  * them */
1771                 nt_domain = talloc_strdup(result, domain);
1772         }
1773         if (!nt_domain) {
1774                 TALLOC_FREE(result);
1775                 return NT_STATUS_NO_MEMORY;
1776         }
1777
1778         /* try to fill the SAM account..  If getpwnam() fails, then try the
1779            add user script (2.2.x behavior).
1780
1781            We use the _unmapped_ username here in an attempt to provide
1782            consistent username mapping behavior between kerberos and NTLM[SSP]
1783            authentication in domain mode security.  I.E. Username mapping
1784            should be applied to the fully qualified username
1785            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1786            called map_username() unnecessarily in make_user_info_map() but
1787            that is how the current code is designed.  Making the change here
1788            is the least disruptive place.  -- jerry */
1789
1790         if ( !(sam_account = samu_new( result )) ) {
1791                 TALLOC_FREE(result);
1792                 return NT_STATUS_NO_MEMORY;
1793         }
1794
1795         /* this call will try to create the user if necessary */
1796
1797         nt_status = fill_sam_account(result, nt_domain, sent_nt_username,
1798                                      &found_username, &uid, &gid, sam_account,
1799                                      &username_was_mapped);
1800
1801         /* if we still don't have a valid unix account check for
1802           'map to guest = bad uid' */
1803
1804         if (!NT_STATUS_IS_OK(nt_status)) {
1805                 TALLOC_FREE( result );
1806                 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1807                         make_server_info_guest(NULL, server_info);
1808                         return NT_STATUS_OK;
1809                 }
1810                 return nt_status;
1811         }
1812
1813         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1814                 TALLOC_FREE(result);
1815                 return NT_STATUS_NO_MEMORY;
1816         }
1817
1818         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1819                 TALLOC_FREE(result);
1820                 return NT_STATUS_NO_MEMORY;
1821         }
1822
1823         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1824                 TALLOC_FREE(result);
1825                 return NT_STATUS_NO_MEMORY;
1826         }
1827
1828         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1829                 TALLOC_FREE(result);
1830                 return NT_STATUS_UNSUCCESSFUL;
1831         }
1832
1833         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1834                 TALLOC_FREE(result);
1835                 return NT_STATUS_UNSUCCESSFUL;
1836         }
1837
1838         if (!pdb_set_fullname(sam_account, info->full_name, PDB_CHANGED)) {
1839                 TALLOC_FREE(result);
1840                 return NT_STATUS_NO_MEMORY;
1841         }
1842
1843         if (!pdb_set_logon_script(sam_account, info->logon_script, PDB_CHANGED)) {
1844                 TALLOC_FREE(result);
1845                 return NT_STATUS_NO_MEMORY;
1846         }
1847
1848         if (!pdb_set_profile_path(sam_account, info->profile_path, PDB_CHANGED)) {
1849                 TALLOC_FREE(result);
1850                 return NT_STATUS_NO_MEMORY;
1851         }
1852
1853         if (!pdb_set_homedir(sam_account, info->home_directory, PDB_CHANGED)) {
1854                 TALLOC_FREE(result);
1855                 return NT_STATUS_NO_MEMORY;
1856         }
1857
1858         if (!pdb_set_dir_drive(sam_account, info->home_drive, PDB_CHANGED)) {
1859                 TALLOC_FREE(result);
1860                 return NT_STATUS_NO_MEMORY;
1861         }
1862
1863         if (!pdb_set_acct_ctrl(sam_account, info->acct_flags, PDB_CHANGED)) {
1864                 TALLOC_FREE(result);
1865                 return NT_STATUS_NO_MEMORY;
1866         }
1867
1868         if (!pdb_set_pass_last_set_time(
1869                     sam_account,
1870                     nt_time_to_unix(info->pass_last_set_time),
1871                     PDB_CHANGED)) {
1872                 TALLOC_FREE(result);
1873                 return NT_STATUS_NO_MEMORY;
1874         }
1875
1876         if (!pdb_set_pass_can_change_time(
1877                     sam_account,
1878                     nt_time_to_unix(info->pass_can_change_time),
1879                     PDB_CHANGED)) {
1880                 TALLOC_FREE(result);
1881                 return NT_STATUS_NO_MEMORY;
1882         }
1883
1884         if (!pdb_set_pass_must_change_time(
1885                     sam_account,
1886                     nt_time_to_unix(info->pass_must_change_time),
1887                     PDB_CHANGED)) {
1888                 TALLOC_FREE(result);
1889                 return NT_STATUS_NO_MEMORY;
1890         }
1891
1892         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1893            valid struct samu) */
1894
1895         result->sam_account = sam_account;
1896         result->unix_name = talloc_strdup(result, found_username);
1897
1898         result->sanitized_username = sanitize_username(result,
1899                                                        result->unix_name);
1900         result->login_server = talloc_strdup(result, info->logon_server);
1901
1902         if ((result->unix_name == NULL)
1903             || (result->sanitized_username == NULL)
1904             || (result->login_server == NULL)) {
1905                 TALLOC_FREE(result);
1906                 return NT_STATUS_NO_MEMORY;
1907         }
1908
1909         /* Fill in the unix info we found on the way */
1910
1911         result->utok.uid = uid;
1912         result->utok.gid = gid;
1913
1914         /* Create a 'combined' list of all SIDs we might want in the SD */
1915
1916         result->num_sids = info->num_sids - 2;
1917         result->sids = talloc_array(result, DOM_SID, result->num_sids);
1918         if (result->sids == NULL) {
1919                 TALLOC_FREE(result);
1920                 return NT_STATUS_NO_MEMORY;
1921         }
1922
1923         for (i=0; i < result->num_sids; i++) {
1924                 memcpy(&result->sids[i], &info->sids[i+2].sid, sizeof(result->sids[i]));
1925         }
1926
1927         /* ensure we are never given NULL session keys */
1928
1929         ZERO_STRUCT(zeros);
1930
1931         if (memcmp(info->user_session_key, zeros, sizeof(zeros)) == 0) {
1932                 result->user_session_key = data_blob_null;
1933         } else {
1934                 result->user_session_key = data_blob_talloc(
1935                         result, info->user_session_key,
1936                         sizeof(info->user_session_key));
1937         }
1938
1939         if (memcmp(info->lm_session_key, zeros, 8) == 0) {
1940                 result->lm_session_key = data_blob_null;
1941         } else {
1942                 result->lm_session_key = data_blob_talloc(
1943                         result, info->lm_session_key,
1944                         sizeof(info->lm_session_key));
1945         }
1946
1947         result->nss_token |= username_was_mapped;
1948
1949         *server_info = result;
1950
1951         return NT_STATUS_OK;
1952 }
1953
1954 /***************************************************************************
1955  Free a user_info struct
1956 ***************************************************************************/
1957
1958 void free_user_info(auth_usersupplied_info **user_info)
1959 {
1960         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1961         if (*user_info != NULL) {
1962                 if ((*user_info)->smb_name) {
1963                         DEBUG(10,("structure was created for %s\n",
1964                                   (*user_info)->smb_name));
1965                 }
1966                 SAFE_FREE((*user_info)->smb_name);
1967                 SAFE_FREE((*user_info)->internal_username);
1968                 SAFE_FREE((*user_info)->client_domain);
1969                 SAFE_FREE((*user_info)->domain);
1970                 SAFE_FREE((*user_info)->wksta_name);
1971                 data_blob_free(&(*user_info)->lm_resp);
1972                 data_blob_free(&(*user_info)->nt_resp);
1973                 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1974                 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1975                 data_blob_clear_free(&(*user_info)->plaintext_password);
1976                 ZERO_STRUCT(**user_info);
1977         }
1978         SAFE_FREE(*user_info);
1979 }
1980
1981 /***************************************************************************
1982  Make an auth_methods struct
1983 ***************************************************************************/
1984
1985 bool make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1986 {
1987         if (!auth_context) {
1988                 smb_panic("no auth_context supplied to "
1989                           "make_auth_methods()!\n");
1990         }
1991
1992         if (!auth_method) {
1993                 smb_panic("make_auth_methods: pointer to auth_method pointer "
1994                           "is NULL!\n");
1995         }
1996
1997         *auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
1998         if (!*auth_method) {
1999                 DEBUG(0,("make_auth_method: malloc failed!\n"));
2000                 return False;
2001         }
2002         ZERO_STRUCTP(*auth_method);
2003
2004         return True;
2005 }
2006
2007 /**
2008  * Verify whether or not given domain is trusted.
2009  *
2010  * @param domain_name name of the domain to be verified
2011  * @return true if domain is one of the trusted once or
2012  *         false if otherwise
2013  **/
2014
2015 bool is_trusted_domain(const char* dom_name)
2016 {
2017         DOM_SID trustdom_sid;
2018         bool ret;
2019
2020         /* no trusted domains for a standalone server */
2021
2022         if ( lp_server_role() == ROLE_STANDALONE )
2023                 return False;
2024
2025         /* if we are a DC, then check for a direct trust relationships */
2026
2027         if ( IS_DC ) {
2028                 become_root();
2029                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
2030                           "[%s]\n", dom_name ));
2031                 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
2032                 unbecome_root();
2033                 if (ret)
2034                         return True;
2035         }
2036         else {
2037                 wbcErr result;
2038
2039                 /* If winbind is around, ask it */
2040
2041                 result = wb_is_trusted_domain(dom_name);
2042
2043                 if (result == WBC_ERR_SUCCESS) {
2044                         return True;
2045                 }
2046
2047                 if (result == WBC_ERR_DOMAIN_NOT_FOUND) {
2048                         /* winbind could not find the domain */
2049                         return False;
2050                 }
2051
2052                 /* The only other possible result is that winbind is not up
2053                    and running. We need to update the trustdom_cache
2054                    ourselves */
2055
2056                 update_trustdom_cache();
2057         }
2058
2059         /* now the trustdom cache should be available a DC could still
2060          * have a transitive trust so fall back to the cache of trusted
2061          * domains (like a domain member would use  */
2062
2063         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
2064                 return True;
2065         }
2066
2067         return False;
2068 }
2069