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 2 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, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_AUTH
  29
  30 static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
  31                                                    const DOM_SID *user_sid,
  32                                                    BOOL is_guest,
  33                                                    int num_groupsids,
  34                                                    const DOM_SID *groupsids);
  35
  36 /****************************************************************************
  37  Create a UNIX user on demand.
  38 ****************************************************************************/
  39
  40 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  41 {
  42         pstring add_script;
  43         int ret;
  44
  45         pstrcpy(add_script, lp_adduser_script());
  46         if (! *add_script)
  47                 return -1;
  48         all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
  49         if (domain)
  50                 all_string_sub(add_script, "%D", domain, sizeof(pstring));
  51         if (homedir)
  52                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  53         ret = smbrun(add_script,NULL);
  54         flush_pwnam_cache();
  55         DEBUG(ret ? 0 : 3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  56         return ret;
  57 }
  58
  59 /****************************************************************************
  60  Create an auth_usersupplied_data structure
  61 ****************************************************************************/
  62
  63 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
  64                                const char *smb_name,
  65                                const char *internal_username,
  66                                const char *client_domain,
  67                                const char *domain,
  68                                const char *wksta_name,
  69                                DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
  70                                DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
  71                                DATA_BLOB *plaintext,
  72                                BOOL encrypted)
  73 {
  74
  75         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
  76
  77         *user_info = SMB_MALLOC_P(auth_usersupplied_info);
  78         if (*user_info == NULL) {
  79                 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
  80                 return NT_STATUS_NO_MEMORY;
  81         }
  82
  83         ZERO_STRUCTP(*user_info);
  84
  85         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
  86
  87         (*user_info)->smb_name = SMB_STRDUP(smb_name);
  88         if ((*user_info)->smb_name == NULL) {
  89                 free_user_info(user_info);
  90                 return NT_STATUS_NO_MEMORY;
  91         }
  92
  93         (*user_info)->internal_username = SMB_STRDUP(internal_username);
  94         if ((*user_info)->internal_username == NULL) {
  95                 free_user_info(user_info);
  96                 return NT_STATUS_NO_MEMORY;
  97         }
  98
  99         (*user_info)->domain = SMB_STRDUP(domain);
 100         if ((*user_info)->domain == NULL) {
 101                 free_user_info(user_info);
 102                 return NT_STATUS_NO_MEMORY;
 103         }
 104
 105         (*user_info)->client_domain = SMB_STRDUP(client_domain);
 106         if ((*user_info)->client_domain == NULL) {
 107                 free_user_info(user_info);
 108                 return NT_STATUS_NO_MEMORY;
 109         }
 110
 111         (*user_info)->wksta_name = SMB_STRDUP(wksta_name);
 112         if ((*user_info)->wksta_name == NULL) {
 113                 free_user_info(user_info);
 114                 return NT_STATUS_NO_MEMORY;
 115         }
 116
 117         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 118
 119         if (lm_pwd)
 120                 (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
 121         if (nt_pwd)
 122                 (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
 123         if (lm_interactive_pwd)
 124                 (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
 125         if (nt_interactive_pwd)
 126                 (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
 127
 128         if (plaintext)
 129                 (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
 130
 131         (*user_info)->encrypted = encrypted;
 132
 133         (*user_info)->logon_parameters = 0;
 134
 135         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 136
 137         return NT_STATUS_OK;
 138 }
 139
 140 /****************************************************************************
 141  Create an auth_usersupplied_data structure after appropriate mapping.
 142 ****************************************************************************/
 143
 144 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 145                             const char *smb_name,
 146                             const char *client_domain,
 147                             const char *wksta_name,
 148                             DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
 149                             DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
 150                             DATA_BLOB *plaintext,
 151                             BOOL encrypted)
 152 {
 153         const char *domain;
 154         NTSTATUS result;
 155         BOOL was_mapped;
 156         fstring internal_username;
 157         fstrcpy(internal_username, smb_name);
 158         was_mapped = map_username(internal_username);
 159
 160         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 161               client_domain, smb_name, wksta_name));
 162
 163         /* don't allow "" as a domain, fixes a Win9X bug
 164            where it doens't supply a domain for logon script
 165            'net use' commands.                                 */
 166
 167         if ( *client_domain )
 168                 domain = client_domain;
 169         else
 170                 domain = lp_workgroup();
 171
 172         /* do what win2k does.  Always map unknown domains to our own
 173            and let the "passdb backend" handle unknown users. */
 174
 175         if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
 176                 domain = my_sam_name();
 177
 178         /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
 179
 180         result = make_user_info(user_info, smb_name, internal_username,
 181                               client_domain, domain, wksta_name,
 182                               lm_pwd, nt_pwd,
 183                               lm_interactive_pwd, nt_interactive_pwd,
 184                               plaintext, encrypted);
 185         if (NT_STATUS_IS_OK(result)) {
 186                 (*user_info)->was_mapped = was_mapped;
 187         }
 188         return result;
 189 }
 190
 191 /****************************************************************************
 192  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 193  Decrypt and encrypt the passwords.
 194 ****************************************************************************/
 195
 196 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 197                                      const char *smb_name,
 198                                      const char *client_domain,
 199                                      const char *wksta_name,
 200                                      uint32 logon_parameters,
 201                                      const uchar *lm_network_pwd,
 202                                      int lm_pwd_len,
 203                                      const uchar *nt_network_pwd,
 204                                      int nt_pwd_len)
 205 {
 206         BOOL ret;
 207         NTSTATUS status;
 208         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 209         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 210
 211         status = make_user_info_map(user_info,
 212                                     smb_name, client_domain,
 213                                     wksta_name,
 214                                     lm_pwd_len ? &lm_blob : NULL,
 215                                     nt_pwd_len ? &nt_blob : NULL,
 216                                     NULL, NULL, NULL,
 217                                     True);
 218
 219         if (NT_STATUS_IS_OK(status)) {
 220                 (*user_info)->logon_parameters = logon_parameters;
 221         }
 222         ret = NT_STATUS_IS_OK(status) ? True : False;
 223
 224         data_blob_free(&lm_blob);
 225         data_blob_free(&nt_blob);
 226         return ret;
 227 }
 228
 229 /****************************************************************************
 230  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 231  Decrypt and encrypt the passwords.
 232 ****************************************************************************/
 233
 234 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 235                                          const char *smb_name,
 236                                          const char *client_domain,
 237                                          const char *wksta_name,
 238                                          uint32 logon_parameters,
 239                                          const uchar chal[8],
 240                                          const uchar lm_interactive_pwd[16],
 241                                          const uchar nt_interactive_pwd[16],
 242                                          const uchar *dc_sess_key)
 243 {
 244         char lm_pwd[16];
 245         char nt_pwd[16];
 246         unsigned char local_lm_response[24];
 247         unsigned char local_nt_response[24];
 248         unsigned char key[16];
 249
 250         ZERO_STRUCT(key);
 251         memcpy(key, dc_sess_key, 8);
 252
 253         if (lm_interactive_pwd)
 254                 memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 255
 256         if (nt_interactive_pwd)
 257                 memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 258
 259 #ifdef DEBUG_PASSWORD
 260         DEBUG(100,("key:"));
 261         dump_data(100, (char *)key, sizeof(key));
 262
 263         DEBUG(100,("lm owf password:"));
 264         dump_data(100, lm_pwd, sizeof(lm_pwd));
 265
 266         DEBUG(100,("nt owf password:"));
 267         dump_data(100, nt_pwd, sizeof(nt_pwd));
 268 #endif
 269
 270         if (lm_interactive_pwd)
 271                 SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 272
 273         if (nt_interactive_pwd)
 274                 SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 275
 276 #ifdef DEBUG_PASSWORD
 277         DEBUG(100,("decrypt of lm owf password:"));
 278         dump_data(100, lm_pwd, sizeof(lm_pwd));
 279
 280         DEBUG(100,("decrypt of nt owf password:"));
 281         dump_data(100, nt_pwd, sizeof(nt_pwd));
 282 #endif
 283
 284         if (lm_interactive_pwd)
 285                 SMBOWFencrypt((const unsigned char *)lm_pwd, chal,
 286                               local_lm_response);
 287
 288         if (nt_interactive_pwd)
 289                 SMBOWFencrypt((const unsigned char *)nt_pwd, chal,
 290                               local_nt_response);
 291
 292         /* Password info paranoia */
 293         ZERO_STRUCT(key);
 294
 295         {
 296                 BOOL ret;
 297                 NTSTATUS nt_status;
 298                 DATA_BLOB local_lm_blob;
 299                 DATA_BLOB local_nt_blob;
 300
 301                 DATA_BLOB lm_interactive_blob;
 302                 DATA_BLOB nt_interactive_blob;
 303
 304                 if (lm_interactive_pwd) {
 305                         local_lm_blob = data_blob(local_lm_response,
 306                                                   sizeof(local_lm_response));
 307                         lm_interactive_blob = data_blob(lm_pwd,
 308                                                         sizeof(lm_pwd));
 309                         ZERO_STRUCT(lm_pwd);
 310                 }
 311
 312                 if (nt_interactive_pwd) {
 313                         local_nt_blob = data_blob(local_nt_response,
 314                                                   sizeof(local_nt_response));
 315                         nt_interactive_blob = data_blob(nt_pwd,
 316                                                         sizeof(nt_pwd));
 317                         ZERO_STRUCT(nt_pwd);
 318                 }
 319
 320                 nt_status = make_user_info_map(
 321                         user_info,
 322                         smb_name, client_domain, wksta_name,
 323                         lm_interactive_pwd ? &local_lm_blob : NULL,
 324                         nt_interactive_pwd ? &local_nt_blob : NULL,
 325                         lm_interactive_pwd ? &lm_interactive_blob : NULL,
 326                         nt_interactive_pwd ? &nt_interactive_blob : NULL,
 327                         NULL, True);
 328
 329                 if (NT_STATUS_IS_OK(nt_status)) {
 330                         (*user_info)->logon_parameters = logon_parameters;
 331                 }
 332
 333                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 334                 data_blob_free(&local_lm_blob);
 335                 data_blob_free(&local_nt_blob);
 336                 data_blob_free(&lm_interactive_blob);
 337                 data_blob_free(&nt_interactive_blob);
 338                 return ret;
 339         }
 340 }
 341
 342
 343 /****************************************************************************
 344  Create an auth_usersupplied_data structure
 345 ****************************************************************************/
 346
 347 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 348                               const char *smb_name,
 349                               const char *client_domain,
 350                               const uint8 chal[8],
 351                               DATA_BLOB plaintext_password)
 352 {
 353
 354         DATA_BLOB local_lm_blob;
 355         DATA_BLOB local_nt_blob;
 356         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 357
 358         /*
 359          * Not encrypted - do so.
 360          */
 361
 362         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
 363                  "format.\n"));
 364
 365         if (plaintext_password.data) {
 366                 unsigned char local_lm_response[24];
 367
 368 #ifdef DEBUG_PASSWORD
 369                 DEBUG(10,("Unencrypted password (len %d):\n",
 370                           (int)plaintext_password.length));
 371                 dump_data(100, (const char *)plaintext_password.data,
 372                           plaintext_password.length);
 373 #endif
 374
 375                 SMBencrypt( (const char *)plaintext_password.data,
 376                             (const uchar*)chal, local_lm_response);
 377                 local_lm_blob = data_blob(local_lm_response, 24);
 378
 379                 /* We can't do an NT hash here, as the password needs to be
 380                    case insensitive */
 381                 local_nt_blob = data_blob(NULL, 0);
 382
 383         } else {
 384                 local_lm_blob = data_blob(NULL, 0);
 385                 local_nt_blob = data_blob(NULL, 0);
 386         }
 387
 388         ret = make_user_info_map(
 389                 user_info, smb_name, client_domain,
 390                 get_remote_machine_name(),
 391                 local_lm_blob.data ? &local_lm_blob : NULL,
 392                 local_nt_blob.data ? &local_nt_blob : NULL,
 393                 NULL, NULL,
 394                 plaintext_password.data ? &plaintext_password : NULL,
 395                 False);
 396
 397         data_blob_free(&local_lm_blob);
 398         return NT_STATUS_IS_OK(ret) ? True : False;
 399 }
 400
 401 /****************************************************************************
 402  Create an auth_usersupplied_data structure
 403 ****************************************************************************/
 404
 405 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 406                                       const char *smb_name,
 407                                       const char *client_domain,
 408                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 409 {
 410         return make_user_info_map(user_info, smb_name,
 411                                   client_domain,
 412                                   get_remote_machine_name(),
 413                                   lm_resp.data ? &lm_resp : NULL,
 414                                   nt_resp.data ? &nt_resp : NULL,
 415                                   NULL, NULL, NULL,
 416                                   True);
 417 }
 418
 419 /****************************************************************************
 420  Create a guest user_info blob, for anonymous authenticaion.
 421 ****************************************************************************/
 422
 423 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 424 {
 425         NTSTATUS nt_status;
 426
 427         nt_status = make_user_info(user_info,
 428                                    "","",
 429                                    "","",
 430                                    "",
 431                                    NULL, NULL,
 432                                    NULL, NULL,
 433                                    NULL,
 434                                    True);
 435
 436         return NT_STATUS_IS_OK(nt_status) ? True : False;
 437 }
 438
 439 /****************************************************************************
 440  prints a NT_USER_TOKEN to debug output.
 441 ****************************************************************************/
 442
 443 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 444 {
 445         size_t     i;
 446
 447         if (!token) {
 448                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 449                 return;
 450         }
 451
 452         DEBUGC(dbg_class, dbg_lev,
 453                ("NT user token of user %s\n",
 454                 sid_string_static(&token->user_sids[0]) ));
 455         DEBUGADDC(dbg_class, dbg_lev,
 456                   ("contains %lu SIDs\n", (unsigned long)token->num_sids));
 457         for (i = 0; i < token->num_sids; i++)
 458                 DEBUGADDC(dbg_class, dbg_lev,
 459                           ("SID[%3lu]: %s\n", (unsigned long)i,
 460                            sid_string_static(&token->user_sids[i])));
 461
 462         dump_se_priv( dbg_class, dbg_lev, &token->privileges );
 463 }
 464
 465 /****************************************************************************
 466  prints a UNIX 'token' to debug output.
 467 ****************************************************************************/
 468
 469 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid,
 470                            int n_groups, gid_t *groups)
 471 {
 472         int     i;
 473         DEBUGC(dbg_class, dbg_lev,
 474                ("UNIX token of user %ld\n", (long int)uid));
 475
 476         DEBUGADDC(dbg_class, dbg_lev,
 477                   ("Primary group is %ld and contains %i supplementary "
 478                    "groups\n", (long int)gid, n_groups));
 479         for (i = 0; i < n_groups; i++)
 480                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 481                         (long int)groups[i]));
 482 }
 483
 484 /******************************************************************************
 485  Create a token for the root user to be used internally by smbd.
 486  This is similar to running under the context of the LOCAL_SYSTEM account
 487  in Windows.  This is a read-only token.  Do not modify it or free() it.
 488  Create a copy if your need to change it.
 489 ******************************************************************************/
 490
 491 NT_USER_TOKEN *get_root_nt_token( void )
 492 {
 493         static NT_USER_TOKEN *token = NULL;
 494         DOM_SID u_sid, g_sid;
 495         struct passwd *pw;
 496
 497         if ( token )
 498                 return token;
 499
 500         if ( !(pw = sys_getpwnam( "root" )) ) {
 501                 DEBUG(0,("get_root_nt_token: getpwnam\"root\") failed!\n"));
 502                 return NULL;
 503         }
 504
 505         /* get the user and primary group SIDs; although the
 506            BUILTIN\Administrators SId is really the one that matters here */
 507
 508         uid_to_sid(&u_sid, pw->pw_uid);
 509         gid_to_sid(&g_sid, pw->pw_gid);
 510
 511         token = create_local_nt_token(NULL, &u_sid, False,
 512                                       1, &global_sid_Builtin_Administrators);
 513         return token;
 514 }
 515
 516 static int server_info_dtor(auth_serversupplied_info *server_info)
 517 {
 518         TALLOC_FREE(server_info->sam_account);
 519         ZERO_STRUCTP(server_info);
 520         return 0;
 521 }
 522
 523 /***************************************************************************
 524  Make a server_info struct. Free with TALLOC_FREE().
 525 ***************************************************************************/
 526
 527 static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
 528 {
 529         struct auth_serversupplied_info *result;
 530
 531         result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
 532         if (result == NULL) {
 533                 DEBUG(0, ("talloc failed\n"));
 534                 return NULL;
 535         }
 536
 537         talloc_set_destructor(result, server_info_dtor);
 538
 539         /* Initialise the uid and gid values to something non-zero
 540            which may save us from giving away root access if there
 541            is a bug in allocating these fields. */
 542
 543         result->uid = -1;
 544         result->gid = -1;
 545         return result;
 546 }
 547
 548 /***************************************************************************
 549  Make (and fill) a user_info struct from a struct samu
 550 ***************************************************************************/
 551
 552 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 553                               struct samu *sampass)
 554 {
 555         NTSTATUS status;
 556         struct passwd *pwd;
 557         gid_t *gids;
 558         auth_serversupplied_info *result;
 559         int i;
 560         size_t num_gids;
 561         DOM_SID unix_group_sid;
 562
 563
 564         if ( !(pwd = getpwnam_alloc(NULL, pdb_get_username(sampass))) ) {
 565                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
 566                           pdb_get_username(sampass)));
 567                 return NT_STATUS_NO_SUCH_USER;
 568         }
 569
 570         if ( !(result = make_server_info(NULL)) ) {
 571                 TALLOC_FREE(pwd);
 572                 return NT_STATUS_NO_MEMORY;
 573         }
 574
 575         result->sam_account = sampass;
 576         result->unix_name = talloc_strdup(result, pwd->pw_name);
 577         result->gid = pwd->pw_gid;
 578         result->uid = pwd->pw_uid;
 579
 580         TALLOC_FREE(pwd);
 581
 582         status = pdb_enum_group_memberships(result, sampass,
 583                                             &result->sids, &gids,
 584                                             &result->num_sids);
 585
 586         if (!NT_STATUS_IS_OK(status)) {
 587                 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
 588                            nt_errstr(status)));
 589                 result->sam_account = NULL; /* Don't free on error exit. */
 590                 TALLOC_FREE(result);
 591                 return status;
 592         }
 593
 594         /* Add the "Unix Group" SID for each gid to catch mapped groups
 595            and their Unix equivalent.  This is to solve the backwards
 596            compatibility problem of 'valid users = +ntadmin' where
 597            ntadmin has been paired with "Domain Admins" in the group
 598            mapping table.  Otherwise smb.conf would need to be changed
 599            to 'valid user = "Domain Admins"'.  --jerry */
 600
 601         num_gids = result->num_sids;
 602         for ( i=0; i<num_gids; i++ ) {
 603                 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
 604                         DEBUG(1,("make_server_info_sam: Failed to create SID "
 605                                 "for gid %d!\n", gids[i]));
 606                         continue;
 607                 }
 608                 if (!add_sid_to_array_unique( result, &unix_group_sid,
 609                                 &result->sids, &result->num_sids )) {
 610                         result->sam_account = NULL; /* Don't free on error exit. */
 611                         TALLOC_FREE(result);
 612                         return NT_STATUS_NO_MEMORY;
 613                 }
 614         }
 615
 616         /* For now we throw away the gids and convert via sid_to_gid
 617          * later. This needs fixing, but I'd like to get the code straight and
 618          * simple first. */
 619
 620         TALLOC_FREE(gids);
 621
 622         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
 623                  pdb_get_username(sampass), result->unix_name));
 624
 625         *server_info = result;
 626
 627         return NT_STATUS_OK;
 628 }
 629
 630 /*
 631  * Add alias SIDs from memberships within the partially created token SID list
 632  */
 633
 634 static NTSTATUS add_aliases(const DOM_SID *domain_sid,
 635                             struct nt_user_token *token)
 636 {
 637         uint32 *aliases;
 638         size_t i, num_aliases;
 639         NTSTATUS status;
 640         TALLOC_CTX *tmp_ctx;
 641
 642         if (!(tmp_ctx = talloc_init("add_aliases"))) {
 643                 return NT_STATUS_NO_MEMORY;
 644         }
 645
 646         aliases = NULL;
 647         num_aliases = 0;
 648
 649         status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
 650                                             token->user_sids,
 651                                             token->num_sids,
 652                                             &aliases, &num_aliases);
 653
 654         if (!NT_STATUS_IS_OK(status)) {
 655                 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
 656                            nt_errstr(status)));
 657                 TALLOC_FREE(tmp_ctx);
 658                 return status;
 659         }
 660
 661         for (i=0; i<num_aliases; i++) {
 662                 DOM_SID alias_sid;
 663                 sid_compose(&alias_sid, domain_sid, aliases[i]);
 664                 if (!add_sid_to_array_unique(token, &alias_sid,
 665                                         &token->user_sids,
 666                                         &token->num_sids)) {
 667                         DEBUG(0, ("add_sid_to_array failed\n"));
 668                         TALLOC_FREE(tmp_ctx);
 669                         return NT_STATUS_NO_MEMORY;
 670                 }
 671         }
 672
 673         TALLOC_FREE(tmp_ctx);
 674         return NT_STATUS_OK;
 675 }
 676
 677 static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
 678 {
 679         char *command;
 680         char *group_sidstr;
 681         size_t i;
 682
 683         if ((lp_log_nt_token_command() == NULL) ||
 684             (strlen(lp_log_nt_token_command()) == 0)) {
 685                 return NT_STATUS_OK;
 686         }
 687
 688         group_sidstr = talloc_strdup(tmp_ctx, "");
 689         for (i=1; i<token->num_sids; i++) {
 690                 group_sidstr = talloc_asprintf(
 691                         tmp_ctx, "%s %s", group_sidstr,
 692                         sid_string_static(&token->user_sids[i]));
 693         }
 694
 695         command = talloc_string_sub(
 696                 tmp_ctx, lp_log_nt_token_command(),
 697                 "%s", sid_string_static(&token->user_sids[0]));
 698         command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
 699
 700         if (command == NULL) {
 701                 return NT_STATUS_NO_MEMORY;
 702         }
 703
 704         DEBUG(8, ("running command: [%s]\n", command));
 705         if (smbrun(command, NULL) != 0) {
 706                 DEBUG(0, ("Could not log NT token\n"));
 707                 return NT_STATUS_ACCESS_DENIED;
 708         }
 709
 710         return NT_STATUS_OK;
 711 }
 712
 713 /*******************************************************************
 714 *******************************************************************/
 715
 716 static NTSTATUS add_builtin_administrators( struct nt_user_token *token )
 717 {
 718         DOM_SID domadm;
 719
 720         /* nothing to do if we aren't in a domain */
 721
 722         if ( !(IS_DC || lp_server_role()==ROLE_DOMAIN_MEMBER) ) {
 723                 return NT_STATUS_OK;
 724         }
 725
 726         /* Find the Domain Admins SID */
 727
 728         if ( IS_DC ) {
 729                 sid_copy( &domadm, get_global_sam_sid() );
 730         } else {
 731                 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm ) )
 732                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 733         }
 734         sid_append_rid( &domadm, DOMAIN_GROUP_RID_ADMINS );
 735
 736         /* Add Administrators if the user beloongs to Domain Admins */
 737
 738         if ( nt_token_check_sid( &domadm, token ) ) {
 739                 if (!add_sid_to_array(token, &global_sid_Builtin_Administrators,
 740                                          &token->user_sids, &token->num_sids)) {
 741                         return NT_STATUS_NO_MEMORY;
 742                 }
 743         }
 744
 745         return NT_STATUS_OK;
 746 }
 747
 748 /*******************************************************************
 749 *******************************************************************/
 750
 751 static NTSTATUS create_builtin_users( void )
 752 {
 753         NTSTATUS status;
 754         DOM_SID dom_users;
 755
 756         status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS );
 757         if ( !NT_STATUS_IS_OK(status) ) {
 758                 DEBUG(0,("create_builtin_users: Failed to create Users\n"));
 759                 return status;
 760         }
 761
 762         /* add domain users */
 763         if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
 764                 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users))
 765         {
 766                 sid_append_rid(&dom_users, DOMAIN_GROUP_RID_USERS );
 767                 status = pdb_add_aliasmem( &global_sid_Builtin_Users, &dom_users);
 768                 if ( !NT_STATUS_IS_OK(status) ) {
 769                         DEBUG(0,("create_builtin_administrators: Failed to add Domain Users to"
 770                                 " Users\n"));
 771                         return status;
 772                 }
 773         }
 774
 775         return NT_STATUS_OK;
 776 }
 777
 778 /*******************************************************************
 779 *******************************************************************/
 780
 781 static NTSTATUS create_builtin_administrators( void )
 782 {
 783         NTSTATUS status;
 784         DOM_SID dom_admins, root_sid;
 785         fstring root_name;
 786         enum lsa_SidType type;
 787         TALLOC_CTX *ctx;
 788         BOOL ret;
 789
 790         status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS );
 791         if ( !NT_STATUS_IS_OK(status) ) {
 792                 DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
 793                 return status;
 794         }
 795
 796         /* add domain admins */
 797         if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
 798                 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins))
 799         {
 800                 sid_append_rid(&dom_admins, DOMAIN_GROUP_RID_ADMINS);
 801                 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &dom_admins );
 802                 if ( !NT_STATUS_IS_OK(status) ) {
 803                         DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
 804                                 " Administrators\n"));
 805                         return status;
 806                 }
 807         }
 808
 809         /* add root */
 810         if ( (ctx = talloc_init("create_builtin_administrators")) == NULL ) {
 811                 return NT_STATUS_NO_MEMORY;
 812         }
 813         fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
 814         ret = lookup_name( ctx, root_name, 0, NULL, NULL, &root_sid, &type );
 815         TALLOC_FREE( ctx );
 816
 817         if ( ret ) {
 818                 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &root_sid );
 819                 if ( !NT_STATUS_IS_OK(status) ) {
 820                         DEBUG(0,("create_builtin_administrators: Failed to add root"
 821                                 " Administrators\n"));
 822                         return status;
 823                 }
 824         }
 825
 826         return NT_STATUS_OK;
 827 }
 828
 829 /*******************************************************************
 830  Create a NT token for the user, expanding local aliases
 831 *******************************************************************/
 832
 833 static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
 834                                                    const DOM_SID *user_sid,
 835                                                    BOOL is_guest,
 836                                                    int num_groupsids,
 837                                                    const DOM_SID *groupsids)
 838 {
 839         struct nt_user_token *result = NULL;
 840         int i;
 841         NTSTATUS status;
 842         gid_t gid;
 843
 844         DEBUG(10, ("Create local NT token for %s\n", sid_string_static(user_sid)));
 845
 846         if (!(result = TALLOC_ZERO_P(mem_ctx, NT_USER_TOKEN))) {
 847                 DEBUG(0, ("talloc failed\n"));
 848                 return NULL;
 849         }
 850
 851         /* Add the user and primary group sid */
 852
 853         if (!add_sid_to_array(result, user_sid,
 854                          &result->user_sids, &result->num_sids)) {
 855                 return NULL;
 856         }
 857
 858         /* For guest, num_groupsids may be zero. */
 859         if (num_groupsids) {
 860                 if (!add_sid_to_array(result, &groupsids[0],
 861                                  &result->user_sids, &result->num_sids)) {
 862                         return NULL;
 863                 }
 864         }
 865
 866         /* Add in BUILTIN sids */
 867
 868         if (!add_sid_to_array(result, &global_sid_World,
 869                          &result->user_sids, &result->num_sids)) {
 870                 return NULL;
 871         }
 872         if (!add_sid_to_array(result, &global_sid_Network,
 873                          &result->user_sids, &result->num_sids)) {
 874                 return NULL;
 875         }
 876
 877         if (is_guest) {
 878                 if (!add_sid_to_array(result, &global_sid_Builtin_Guests,
 879                                  &result->user_sids, &result->num_sids)) {
 880                         return NULL;
 881                 }
 882         } else {
 883                 if (!add_sid_to_array(result, &global_sid_Authenticated_Users,
 884                                  &result->user_sids, &result->num_sids)) {
 885                         return NULL;
 886                 }
 887         }
 888
 889         /* Now the SIDs we got from authentication. These are the ones from
 890          * the info3 struct or from the pdb_enum_group_memberships, depending
 891          * on who authenticated the user.
 892          * Note that we start the for loop at "1" here, we already added the
 893          * first group sid as primary above. */
 894
 895         for (i=1; i<num_groupsids; i++) {
 896                 if (!add_sid_to_array_unique(result, &groupsids[i],
 897                                         &result->user_sids, &result->num_sids)) {
 898                         return NULL;
 899                 }
 900         }
 901
 902         /* Deal with the BUILTIN\Administrators group.  If the SID can
 903            be resolved then assume that the add_aliasmem( S-1-5-32 )
 904            handled it. */
 905
 906         if ( !sid_to_gid( &global_sid_Builtin_Administrators, &gid ) ) {
 907                 /* We can only create a mapping if winbind is running
 908                    and the nested group functionality has been enabled */
 909
 910                 if ( lp_winbind_nested_groups() && winbind_ping() ) {
 911                         become_root();
 912                         status = create_builtin_administrators( );
 913                         if ( !NT_STATUS_IS_OK(status) ) {
 914                                 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
 915                                 /* don't fail, just log the message */
 916                         }
 917                         unbecome_root();
 918                 }
 919                 else {
 920                         status = add_builtin_administrators( result );
 921                         if ( !NT_STATUS_IS_OK(status) ) {
 922                                 /* just log a complaint but do not fail */
 923                                 DEBUG(3,("create_local_nt_token: failed to check for local Administrators"
 924                                         " membership (%s)\n", nt_errstr(status)));
 925                         }
 926                 }
 927         }
 928
 929         /* Deal with the BUILTIN\Users group.  If the SID can
 930            be resolved then assume that the add_aliasmem( S-1-5-32 )
 931            handled it. */
 932
 933         if ( !sid_to_gid( &global_sid_Builtin_Users, &gid ) ) {
 934                 /* We can only create a mapping if winbind is running
 935                    and the nested group functionality has been enabled */
 936
 937                 if ( lp_winbind_nested_groups() && winbind_ping() ) {
 938                         become_root();
 939                         status = create_builtin_users( );
 940                         if ( !NT_STATUS_IS_OK(status) ) {
 941                                 DEBUG(2,("create_local_nt_token: Failed to create BUILTIN\\Users group!\n"));
 942                                 /* don't fail, just log the message */
 943                         }
 944                         unbecome_root();
 945                 }
 946         }
 947
 948         /* Deal with local groups */
 949
 950         if (lp_winbind_nested_groups()) {
 951
 952                 /* Now add the aliases. First the one from our local SAM */
 953
 954                 status = add_aliases(get_global_sam_sid(), result);
 955
 956                 if (!NT_STATUS_IS_OK(status)) {
 957                         TALLOC_FREE(result);
 958                         return NULL;
 959                 }
 960
 961                 /* Finally the builtin ones */
 962
 963                 status = add_aliases(&global_sid_Builtin, result);
 964
 965                 if (!NT_STATUS_IS_OK(status)) {
 966                         TALLOC_FREE(result);
 967                         return NULL;
 968                 }
 969         }
 970
 971
 972         get_privileges_for_sids(&result->privileges, result->user_sids,
 973                                 result->num_sids);
 974         return result;
 975 }
 976
 977 /*
 978  * Create the token to use from server_info->sam_account and
 979  * server_info->sids (the info3/sam groups). Find the unix gids.
 980  */
 981
 982 NTSTATUS create_local_token(auth_serversupplied_info *server_info)
 983 {
 984         TALLOC_CTX *mem_ctx;
 985         struct id_map *ids;
 986         NTSTATUS status;
 987         size_t i;
 988
 989
 990         mem_ctx = talloc_new(NULL);
 991         if (mem_ctx == NULL) {
 992                 DEBUG(0, ("talloc_new failed\n"));
 993                 return NT_STATUS_NO_MEMORY;
 994         }
 995
 996         /*
 997          * If winbind is not around, we can not make much use of the SIDs the
 998          * domain controller provided us with. Likewise if the user name was
 999          * mapped to some local unix user.
1000          */
1001
1002         if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) ||
1003             (server_info->was_mapped)) {
1004                 status = create_token_from_username(server_info,
1005                                                     server_info->unix_name,
1006                                                     server_info->guest,
1007                                                     &server_info->uid,
1008                                                     &server_info->gid,
1009                                                     &server_info->unix_name,
1010                                                     &server_info->ptok);
1011
1012         } else {
1013                 server_info->ptok = create_local_nt_token(
1014                         server_info,
1015                         pdb_get_user_sid(server_info->sam_account),
1016                         server_info->guest,
1017                         server_info->num_sids, server_info->sids);
1018                 status = server_info->ptok ?
1019                         NT_STATUS_OK : NT_STATUS_NO_SUCH_USER;
1020         }
1021
1022         if (!NT_STATUS_IS_OK(status)) {
1023                 TALLOC_FREE(mem_ctx);
1024                 return status;
1025         }
1026
1027         /* Convert the SIDs to gids. */
1028
1029         server_info->n_groups = 0;
1030         server_info->groups = NULL;
1031
1032         /* Start at index 1, where the groups start. */
1033         ids = talloc_zero_array(mem_ctx, struct id_map, server_info->ptok->num_sids);
1034         for (i = 0; i < server_info->ptok->num_sids-1; i++) {
1035                 ids[i].sid = &server_info->ptok->user_sids[i + 1]; /* store the sids */
1036         }
1037
1038         if (!winbind_sids_to_unixids(ids, server_info->ptok->num_sids-1)) {
1039                 DEBUG(2, ("Query to map secondary SIDs failed!\n"));
1040         }
1041
1042         for (i = 0; i < server_info->ptok->num_sids-1; i++) {
1043                 if ( ! ids[i].mapped) {
1044                         DEBUG(10, ("Could not convert SID %s to gid, "
1045                                    "ignoring it\n", sid_string_static(ids[i].sid)));
1046                         continue;
1047                 }
1048                 if ( ! ids[i].xid.type == ID_TYPE_UID) {
1049                         DEBUG(10, ("SID %s is a User ID (%u) not a Group ID, "
1050                                    "ignoring it\n", sid_string_static(ids[i].sid), ids[i].xid.id));
1051                         continue;
1052                 }
1053                 if (!add_gid_to_array_unique(server_info, (gid_t)ids[i].xid.id, &server_info->groups,
1054                                         &server_info->n_groups)) {
1055                         TALLOC_FREE(mem_ctx);
1056                         return NT_STATUS_NO_MEMORY;
1057                 }
1058         }
1059
1060         debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
1061
1062         status = log_nt_token(mem_ctx, server_info->ptok);
1063
1064         TALLOC_FREE(mem_ctx);
1065         return status;
1066 }
1067
1068 /*
1069  * Create an artificial NT token given just a username. (Initially indended
1070  * for force user)
1071  *
1072  * We go through lookup_name() to avoid problems we had with 'winbind use
1073  * default domain'.
1074  *
1075  * We have 3 cases:
1076  *
1077  * unmapped unix users: Go directly to nss to find the user's group.
1078  *
1079  * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
1080  *
1081  * If the user is provided by winbind, the primary gid is set to "domain
1082  * users" of the user's domain. For an explanation why this is necessary, see
1083  * the thread starting at
1084  * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
1085  */
1086
1087 NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
1088                                     BOOL is_guest,
1089                                     uid_t *uid, gid_t *gid,
1090                                     char **found_username,
1091                                     struct nt_user_token **token)
1092 {
1093         NTSTATUS result = NT_STATUS_NO_SUCH_USER;
1094         TALLOC_CTX *tmp_ctx;
1095         DOM_SID user_sid;
1096         enum lsa_SidType type;
1097         gid_t *gids;
1098         DOM_SID *group_sids;
1099         DOM_SID unix_group_sid;
1100         size_t num_group_sids;
1101         size_t num_gids;
1102         size_t i;
1103
1104         tmp_ctx = talloc_new(NULL);
1105         if (tmp_ctx == NULL) {
1106                 DEBUG(0, ("talloc_new failed\n"));
1107                 return NT_STATUS_NO_MEMORY;
1108         }
1109
1110         if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
1111                          NULL, NULL, &user_sid, &type)) {
1112                 DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
1113                 goto done;
1114         }
1115
1116         if (type != SID_NAME_USER) {
1117                 DEBUG(1, ("%s is a %s, not a user\n", username,
1118                           sid_type_lookup(type)));
1119                 goto done;
1120         }
1121
1122         if (!sid_to_uid(&user_sid, uid)) {
1123                 DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
1124                           username, sid_string_static(&user_sid)));
1125                 goto done;
1126         }
1127
1128         if (sid_check_is_in_our_domain(&user_sid)) {
1129
1130                 /* This is a passdb user, so ask passdb */
1131
1132                 struct samu *sam_acct = NULL;
1133
1134                 if ( !(sam_acct = samu_new( tmp_ctx )) ) {
1135                         result = NT_STATUS_NO_MEMORY;
1136                         goto done;
1137                 }
1138
1139                 if (!pdb_getsampwsid(sam_acct, &user_sid)) {
1140                         DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
1141                                   sid_string_static(&user_sid), username));
1142                         DEBUGADD(1, ("Fall back to unix user %s\n", username));
1143                         goto unix_user;
1144                 }
1145
1146                 result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
1147                                                     &group_sids, &gids,
1148                                                     &num_group_sids);
1149                 if (!NT_STATUS_IS_OK(result)) {
1150                         DEBUG(10, ("enum_group_memberships failed for %s\n",
1151                                    username));
1152                         DEBUGADD(1, ("Fall back to unix user %s\n", username));
1153                         goto unix_user;
1154                 }
1155
1156                 /* see the smb_panic() in pdb_default_enum_group_memberships */
1157                 SMB_ASSERT(num_group_sids > 0);
1158
1159                 *gid = gids[0];
1160
1161                 /* Ensure we're returning the found_username on the right context. */
1162                 *found_username = talloc_strdup(mem_ctx,
1163                                                 pdb_get_username(sam_acct));
1164
1165         } else  if (sid_check_is_in_unix_users(&user_sid)) {
1166
1167                 /* This is a unix user not in passdb. We need to ask nss
1168                  * directly, without consulting passdb */
1169
1170                 struct passwd *pass;
1171
1172                 /*
1173                  * This goto target is used as a fallback for the passdb
1174                  * case. The concrete bug report is when passdb gave us an
1175                  * unmapped gid.
1176                  */
1177
1178         unix_user:
1179
1180                 uid_to_unix_users_sid(*uid, &user_sid);
1181
1182                 pass = getpwuid_alloc(tmp_ctx, *uid);
1183                 if (pass == NULL) {
1184                         DEBUG(1, ("getpwuid(%d) for user %s failed\n",
1185                                   *uid, username));
1186                         goto done;
1187                 }
1188
1189                 if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
1190                                          &gids, &num_group_sids)) {
1191                         DEBUG(1, ("getgroups_unix_user for user %s failed\n",
1192                                   username));
1193                         goto done;
1194                 }
1195
1196                 group_sids = talloc_array(tmp_ctx, DOM_SID, num_group_sids);
1197                 if (group_sids == NULL) {
1198                         DEBUG(1, ("talloc_array failed\n"));
1199                         result = NT_STATUS_NO_MEMORY;
1200                         goto done;
1201                 }
1202
1203                 for (i=0; i<num_group_sids; i++) {
1204                         gid_to_sid(&group_sids[i], gids[i]);
1205                 }
1206
1207                 /* In getgroups_unix_user we always set the primary gid */
1208                 SMB_ASSERT(num_group_sids > 0);
1209
1210                 *gid = gids[0];
1211
1212                 /* Ensure we're returning the found_username on the right context. */
1213                 *found_username = talloc_strdup(mem_ctx, pass->pw_name);
1214         } else {
1215
1216                 /* This user is from winbind, force the primary gid to the
1217                  * user's "domain users" group. Under certain circumstances
1218                  * (user comes from NT4), this might be a loss of
1219                  * information. But we can not rely on winbind getting the
1220                  * correct info. AD might prohibit winbind looking up that
1221                  * information. */
1222
1223                 uint32 dummy;
1224
1225                 num_group_sids = 1;
1226                 group_sids = talloc_array(tmp_ctx, DOM_SID, num_group_sids);
1227                 if (group_sids == NULL) {
1228                         DEBUG(1, ("talloc_array failed\n"));
1229                         result = NT_STATUS_NO_MEMORY;
1230                         goto done;
1231                 }
1232
1233                 sid_copy(&group_sids[0], &user_sid);
1234                 sid_split_rid(&group_sids[0], &dummy);
1235                 sid_append_rid(&group_sids[0], DOMAIN_GROUP_RID_USERS);
1236
1237                 if (!sid_to_gid(&group_sids[0], gid)) {
1238                         DEBUG(1, ("sid_to_gid(%s) failed\n",
1239                                   sid_string_static(&group_sids[0])));
1240                         goto done;
1241                 }
1242
1243                 gids = gid;
1244
1245                 /* Ensure we're returning the found_username on the right context. */
1246                 *found_username = talloc_strdup(mem_ctx, username);
1247         }
1248
1249         /* Add the "Unix Group" SID for each gid to catch mapped groups
1250            and their Unix equivalent.  This is to solve the backwards
1251            compatibility problem of 'valid users = +ntadmin' where
1252            ntadmin has been paired with "Domain Admins" in the group
1253            mapping table.  Otherwise smb.conf would need to be changed
1254            to 'valid user = "Domain Admins"'.  --jerry */
1255
1256         num_gids = num_group_sids;
1257         for ( i=0; i<num_gids; i++ ) {
1258                 gid_t high, low;
1259
1260                 /* don't pickup anything managed by Winbind */
1261
1262                 if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
1263                         continue;
1264
1265                 if ( !gid_to_unix_groups_sid( gids[i], &unix_group_sid ) ) {
1266                         DEBUG(1,("create_token_from_username: Failed to create SID "
1267                                 "for gid %d!\n", gids[i]));
1268                         continue;
1269                 }
1270                 if (!add_sid_to_array_unique(tmp_ctx, &unix_group_sid,
1271                                 &group_sids, &num_group_sids )) {
1272                         result = NT_STATUS_NO_MEMORY;
1273                         goto done;
1274                 }
1275         }
1276
1277         /* Ensure we're creating the nt_token on the right context. */
1278         *token = create_local_nt_token(mem_ctx, &user_sid,
1279                                        is_guest, num_group_sids, group_sids);
1280
1281         if ((*token == NULL) || (*found_username == NULL)) {
1282                 result = NT_STATUS_NO_MEMORY;
1283                 goto done;
1284         }
1285
1286         result = NT_STATUS_OK;
1287  done:
1288         TALLOC_FREE(tmp_ctx);
1289         return result;
1290 }
1291
1292 /***************************************************************************
1293  Build upon create_token_from_username:
1294
1295  Expensive helper function to figure out whether a user given its name is
1296  member of a particular group.
1297 ***************************************************************************/
1298
1299 BOOL user_in_group_sid(const char *username, const DOM_SID *group_sid)
1300 {
1301         NTSTATUS status;
1302         uid_t uid;
1303         gid_t gid;
1304         char *found_username;
1305         struct nt_user_token *token;
1306         BOOL result;
1307
1308         TALLOC_CTX *mem_ctx;
1309
1310         mem_ctx = talloc_new(NULL);
1311         if (mem_ctx == NULL) {
1312                 DEBUG(0, ("talloc_new failed\n"));
1313                 return False;
1314         }
1315
1316         status = create_token_from_username(mem_ctx, username, False,
1317                                             &uid, &gid, &found_username,
1318                                             &token);
1319
1320         if (!NT_STATUS_IS_OK(status)) {
1321                 DEBUG(10, ("could not create token for %s\n", username));
1322                 return False;
1323         }
1324
1325         result = nt_token_check_sid(group_sid, token);
1326
1327         TALLOC_FREE(mem_ctx);
1328         return result;
1329
1330 }
1331
1332 BOOL user_in_group(const char *username, const char *groupname)
1333 {
1334         TALLOC_CTX *mem_ctx;
1335         DOM_SID group_sid;
1336         BOOL ret;
1337
1338         mem_ctx = talloc_new(NULL);
1339         if (mem_ctx == NULL) {
1340                 DEBUG(0, ("talloc_new failed\n"));
1341                 return False;
1342         }
1343
1344         ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
1345                           NULL, NULL, &group_sid, NULL);
1346         TALLOC_FREE(mem_ctx);
1347
1348         if (!ret) {
1349                 DEBUG(10, ("lookup_name for (%s) failed.\n", groupname));
1350                 return False;
1351         }
1352
1353         return user_in_group_sid(username, &group_sid);
1354 }
1355
1356
1357 /***************************************************************************
1358  Make (and fill) a user_info struct from a 'struct passwd' by conversion
1359  to a struct samu
1360 ***************************************************************************/
1361
1362 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
1363                              char *unix_username,
1364                              struct passwd *pwd)
1365 {
1366         NTSTATUS status;
1367         struct samu *sampass = NULL;
1368         gid_t *gids;
1369         auth_serversupplied_info *result;
1370
1371         if ( !(sampass = samu_new( NULL )) ) {
1372                 return NT_STATUS_NO_MEMORY;
1373         }
1374
1375         status = samu_set_unix( sampass, pwd );
1376         if (!NT_STATUS_IS_OK(status)) {
1377                 return status;
1378         }
1379
1380         result = make_server_info(NULL);
1381         if (result == NULL) {
1382                 TALLOC_FREE(sampass);
1383                 return NT_STATUS_NO_MEMORY;
1384         }
1385
1386         result->sam_account = sampass;
1387         result->unix_name = talloc_strdup(result, unix_username);
1388         result->uid = pwd->pw_uid;
1389         result->gid = pwd->pw_gid;
1390
1391         status = pdb_enum_group_memberships(result, sampass,
1392                                             &result->sids, &gids,
1393                                             &result->num_sids);
1394
1395         if (!NT_STATUS_IS_OK(status)) {
1396                 DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
1397                            nt_errstr(status)));
1398                 TALLOC_FREE(result);
1399                 return status;
1400         }
1401
1402         /* For now we throw away the gids and convert via sid_to_gid
1403          * later. This needs fixing, but I'd like to get the code straight and
1404          * simple first. */
1405         TALLOC_FREE(gids);
1406
1407         *server_info = result;
1408
1409         return NT_STATUS_OK;
1410 }
1411
1412 /***************************************************************************
1413  Make (and fill) a user_info struct for a guest login.
1414  This *must* succeed for smbd to start. If there is no mapping entry for
1415  the guest gid, then create one.
1416 ***************************************************************************/
1417
1418 static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
1419 {
1420         NTSTATUS status;
1421         struct samu *sampass = NULL;
1422         DOM_SID guest_sid;
1423         BOOL ret;
1424         static const char zeros[16] = { 0, };
1425
1426         if ( !(sampass = samu_new( NULL )) ) {
1427                 return NT_STATUS_NO_MEMORY;
1428         }
1429
1430         sid_copy(&guest_sid, get_global_sam_sid());
1431         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
1432
1433         become_root();
1434         ret = pdb_getsampwsid(sampass, &guest_sid);
1435         unbecome_root();
1436
1437         if (!ret) {
1438                 TALLOC_FREE(sampass);
1439                 return NT_STATUS_NO_SUCH_USER;
1440         }
1441
1442         status = make_server_info_sam(server_info, sampass);
1443         if (!NT_STATUS_IS_OK(status)) {
1444                 TALLOC_FREE(sampass);
1445                 return status;
1446         }
1447
1448         (*server_info)->guest = True;
1449
1450         status = create_local_token(*server_info);
1451         if (!NT_STATUS_IS_OK(status)) {
1452                 DEBUG(10, ("create_local_token failed: %s\n",
1453                            nt_errstr(status)));
1454                 return status;
1455         }
1456
1457         /* annoying, but the Guest really does have a session key, and it is
1458            all zeros! */
1459         (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
1460         (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
1461
1462         return NT_STATUS_OK;
1463 }
1464
1465 static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
1466 {
1467         auth_serversupplied_info *dst;
1468
1469         dst = make_server_info(NULL);
1470         if (dst == NULL) {
1471                 return NULL;
1472         }
1473
1474         dst->guest = src->guest;
1475         dst->uid = src->uid;
1476         dst->gid = src->gid;
1477         dst->n_groups = src->n_groups;
1478         if (src->n_groups != 0) {
1479                 dst->groups = (gid_t *)talloc_memdup(
1480                         dst, src->groups, sizeof(gid_t)*dst->n_groups);
1481         } else {
1482                 dst->groups = NULL;
1483         }
1484
1485         if (src->ptok) {
1486                 dst->ptok = dup_nt_token(dst, src->ptok);
1487                 if (!dst->ptok) {
1488                         TALLOC_FREE(dst);
1489                         return NULL;
1490                 }
1491         }
1492
1493         dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
1494                                                 src->user_session_key.length);
1495
1496         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1497                                                 src->lm_session_key.length);
1498
1499         dst->sam_account = samu_new(NULL);
1500         if (!dst->sam_account) {
1501                 TALLOC_FREE(dst);
1502                 return NULL;
1503         }
1504
1505         if (!pdb_copy_sam_account(dst->sam_account, src->sam_account)) {
1506                 TALLOC_FREE(dst);
1507                 return NULL;
1508         }
1509
1510         dst->pam_handle = NULL;
1511         dst->unix_name = talloc_strdup(dst, src->unix_name);
1512         if (!dst->unix_name) {
1513                 TALLOC_FREE(dst);
1514                 return NULL;
1515         }
1516
1517         return dst;
1518 }
1519
1520 static auth_serversupplied_info *guest_info = NULL;
1521
1522 BOOL init_guest_info(void)
1523 {
1524         if (guest_info != NULL)
1525                 return True;
1526
1527         return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
1528 }
1529
1530 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
1531 {
1532         *server_info = copy_serverinfo(guest_info);
1533         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1534 }
1535
1536 BOOL copy_current_user(struct current_user *dst, struct current_user *src)
1537 {
1538         gid_t *groups;
1539         NT_USER_TOKEN *nt_token;
1540
1541         groups = (gid_t *)memdup(src->ut.groups,
1542                                  sizeof(gid_t) * src->ut.ngroups);
1543         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1544                 return False;
1545         }
1546
1547         nt_token = dup_nt_token(NULL, src->nt_user_token);
1548         if (nt_token == NULL) {
1549                 SAFE_FREE(groups);
1550                 return False;
1551         }
1552
1553         dst->conn = src->conn;
1554         dst->vuid = src->vuid;
1555         dst->ut.uid = src->ut.uid;
1556         dst->ut.gid = src->ut.gid;
1557         dst->ut.ngroups = src->ut.ngroups;
1558         dst->ut.groups = groups;
1559         dst->nt_user_token = nt_token;
1560         return True;
1561 }
1562
1563 BOOL set_current_user_guest(struct current_user *dst)
1564 {
1565         gid_t *groups;
1566         NT_USER_TOKEN *nt_token;
1567
1568         groups = (gid_t *)memdup(guest_info->groups,
1569                                  sizeof(gid_t) * guest_info->n_groups);
1570         if (groups == NULL) {
1571                 return False;
1572         }
1573
1574         nt_token = dup_nt_token(NULL, guest_info->ptok);
1575         if (nt_token == NULL) {
1576                 SAFE_FREE(groups);
1577                 return False;
1578         }
1579
1580         TALLOC_FREE(dst->nt_user_token);
1581         SAFE_FREE(dst->ut.groups);
1582
1583         /* dst->conn is never really dereferenced, it's only tested for
1584          * equality in uid.c */
1585         dst->conn = NULL;
1586
1587         dst->vuid = UID_FIELD_INVALID;
1588         dst->ut.uid = guest_info->uid;
1589         dst->ut.gid = guest_info->gid;
1590         dst->ut.ngroups = guest_info->n_groups;
1591         dst->ut.groups = groups;
1592         dst->nt_user_token = nt_token;
1593         return True;
1594 }
1595
1596 /***************************************************************************
1597  Purely internal function for make_server_info_info3
1598  Fill the sam account from getpwnam
1599 ***************************************************************************/
1600 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
1601                                  const char *domain,
1602                                  const char *username,
1603                                  char **found_username,
1604                                  uid_t *uid, gid_t *gid,
1605                                  struct samu *account,
1606                                  BOOL *username_was_mapped)
1607 {
1608         NTSTATUS nt_status;
1609         fstring dom_user, lower_username;
1610         fstring real_username;
1611         struct passwd *passwd;
1612
1613         fstrcpy( lower_username, username );
1614         strlower_m( lower_username );
1615
1616         fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
1617                 lower_username);
1618
1619         /* Get the passwd struct.  Try to create the account is necessary. */
1620
1621         *username_was_mapped = map_username( dom_user );
1622
1623         if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
1624                 return NT_STATUS_NO_SUCH_USER;
1625
1626         *uid = passwd->pw_uid;
1627         *gid = passwd->pw_gid;
1628
1629         /* This is pointless -- there is no suport for differing
1630            unix and windows names.  Make sure to always store the
1631            one we actually looked up and succeeded. Have I mentioned
1632            why I hate the 'winbind use default domain' parameter?
1633                                          --jerry              */
1634
1635         *found_username = talloc_strdup( mem_ctx, real_username );
1636
1637         DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
1638
1639         nt_status = samu_set_unix( account, passwd );
1640
1641         TALLOC_FREE(passwd);
1642
1643         return nt_status;
1644 }
1645
1646 /****************************************************************************
1647  Wrapper to allow the getpwnam() call to strip the domain name and
1648  try again in case a local UNIX user is already there.  Also run through
1649  the username if we fallback to the username only.
1650  ****************************************************************************/
1651
1652 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
1653                              fstring save_username, BOOL create )
1654 {
1655         struct passwd *pw = NULL;
1656         char *p;
1657         fstring username;
1658
1659         /* we only save a copy of the username it has been mangled
1660            by winbindd use default domain */
1661
1662         save_username[0] = '\0';
1663
1664         /* don't call map_username() here since it has to be done higher
1665            up the stack so we don't call it mutliple times */
1666
1667         fstrcpy( username, domuser );
1668
1669         p = strchr_m( username, *lp_winbind_separator() );
1670
1671         /* code for a DOMAIN\user string */
1672
1673         if ( p ) {
1674                 fstring strip_username;
1675
1676                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1677                 if ( pw ) {
1678                         /* make sure we get the case of the username correct */
1679                         /* work around 'winbind use default domain = yes' */
1680
1681                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1682                                 char *domain;
1683
1684                                 /* split the domain and username into 2 strings */
1685                                 *p = '\0';
1686                                 domain = username;
1687
1688                                 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1689                         }
1690                         else
1691                                 fstrcpy( save_username, pw->pw_name );
1692
1693                         /* whew -- done! */
1694                         return pw;
1695                 }
1696
1697                 /* setup for lookup of just the username */
1698                 /* remember that p and username are overlapping memory */
1699
1700                 p++;
1701                 fstrcpy( strip_username, p );
1702                 fstrcpy( username, strip_username );
1703         }
1704
1705         /* just lookup a plain username */
1706
1707         pw = Get_Pwnam_alloc(mem_ctx, username);
1708
1709         /* Create local user if requested but only if winbindd
1710            is not running.  We need to protect against cases
1711            where winbindd is failing and then prematurely
1712            creating users in /etc/passwd */
1713
1714         if ( !pw && create && !winbind_ping() ) {
1715                 /* Don't add a machine account. */
1716                 if (username[strlen(username)-1] == '$')
1717                         return NULL;
1718
1719                 smb_create_user(NULL, username, NULL);
1720                 pw = Get_Pwnam_alloc(mem_ctx, username);
1721         }
1722
1723         /* one last check for a valid passwd struct */
1724
1725         if ( pw )
1726                 fstrcpy( save_username, pw->pw_name );
1727
1728         return pw;
1729 }
1730
1731 /***************************************************************************
1732  Make a server_info struct from the info3 returned by a domain logon
1733 ***************************************************************************/
1734
1735 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1736                                 const char *sent_nt_username,
1737                                 const char *domain,
1738                                 auth_serversupplied_info **server_info,
1739                                 NET_USER_INFO_3 *info3)
1740 {
1741         static const char zeros[16] = { 0, };
1742
1743         NTSTATUS nt_status = NT_STATUS_OK;
1744         char *found_username;
1745         const char *nt_domain;
1746         const char *nt_username;
1747         struct samu *sam_account = NULL;
1748         DOM_SID user_sid;
1749         DOM_SID group_sid;
1750         BOOL username_was_mapped;
1751
1752         uid_t uid;
1753         gid_t gid;
1754
1755         size_t i;
1756
1757         auth_serversupplied_info *result;
1758
1759         /*
1760            Here is where we should check the list of
1761            trusted domains, and verify that the SID
1762            matches.
1763         */
1764
1765         sid_copy(&user_sid, &info3->dom_sid.sid);
1766         if (!sid_append_rid(&user_sid, info3->user_rid)) {
1767                 return NT_STATUS_INVALID_PARAMETER;
1768         }
1769
1770         sid_copy(&group_sid, &info3->dom_sid.sid);
1771         if (!sid_append_rid(&group_sid, info3->group_rid)) {
1772                 return NT_STATUS_INVALID_PARAMETER;
1773         }
1774
1775         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1776                 /* If the server didn't give us one, just use the one we sent
1777                  * them */
1778                 nt_username = sent_nt_username;
1779         }
1780
1781         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1782                 /* If the server didn't give us one, just use the one we sent
1783                  * them */
1784                 nt_domain = domain;
1785         }
1786
1787         /* try to fill the SAM account..  If getpwnam() fails, then try the
1788            add user script (2.2.x behavior).
1789
1790            We use the _unmapped_ username here in an attempt to provide
1791            consistent username mapping behavior between kerberos and NTLM[SSP]
1792            authentication in domain mode security.  I.E. Username mapping
1793            should be applied to the fully qualified username
1794            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1795            called map_username() unnecessarily in make_user_info_map() but
1796            that is how the current code is designed.  Making the change here
1797            is the least disruptive place.  -- jerry */
1798
1799         if ( !(sam_account = samu_new( NULL )) ) {
1800                 return NT_STATUS_NO_MEMORY;
1801         }
1802
1803         /* this call will try to create the user if necessary */
1804
1805         nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1806                                      &found_username, &uid, &gid, sam_account,
1807                                      &username_was_mapped);
1808
1809
1810         /* if we still don't have a valid unix account check for
1811           'map to guest = bad uid' */
1812
1813         if (!NT_STATUS_IS_OK(nt_status)) {
1814                 TALLOC_FREE( sam_account );
1815                 if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
1816                         make_server_info_guest(server_info);
1817                         return NT_STATUS_OK;
1818                 }
1819                 return nt_status;
1820         }
1821
1822         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1823                 TALLOC_FREE(sam_account);
1824                 return NT_STATUS_NO_MEMORY;
1825         }
1826
1827         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1828                 TALLOC_FREE(sam_account);
1829                 return NT_STATUS_NO_MEMORY;
1830         }
1831
1832         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1833                 TALLOC_FREE(sam_account);
1834                 return NT_STATUS_NO_MEMORY;
1835         }
1836
1837         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1838                 TALLOC_FREE(sam_account);
1839                 return NT_STATUS_UNSUCCESSFUL;
1840         }
1841
1842         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1843                 TALLOC_FREE(sam_account);
1844                 return NT_STATUS_UNSUCCESSFUL;
1845         }
1846
1847         if (!pdb_set_fullname(sam_account,
1848                               unistr2_static(&(info3->uni_full_name)),
1849                               PDB_CHANGED)) {
1850                 TALLOC_FREE(sam_account);
1851                 return NT_STATUS_NO_MEMORY;
1852         }
1853
1854         if (!pdb_set_logon_script(sam_account,
1855                                   unistr2_static(&(info3->uni_logon_script)),
1856                                   PDB_CHANGED)) {
1857                 TALLOC_FREE(sam_account);
1858                 return NT_STATUS_NO_MEMORY;
1859         }
1860
1861         if (!pdb_set_profile_path(sam_account,
1862                                   unistr2_static(&(info3->uni_profile_path)),
1863                                   PDB_CHANGED)) {
1864                 TALLOC_FREE(sam_account);
1865                 return NT_STATUS_NO_MEMORY;
1866         }
1867
1868         if (!pdb_set_homedir(sam_account,
1869                              unistr2_static(&(info3->uni_home_dir)),
1870                              PDB_CHANGED)) {
1871                 TALLOC_FREE(sam_account);
1872                 return NT_STATUS_NO_MEMORY;
1873         }
1874
1875         if (!pdb_set_dir_drive(sam_account,
1876                                unistr2_static(&(info3->uni_dir_drive)),
1877                                PDB_CHANGED)) {
1878                 TALLOC_FREE(sam_account);
1879                 return NT_STATUS_NO_MEMORY;
1880         }
1881
1882         if (!pdb_set_acct_ctrl(sam_account, info3->acct_flags, PDB_CHANGED)) {
1883                 TALLOC_FREE(sam_account);
1884                 return NT_STATUS_NO_MEMORY;
1885         }
1886
1887         result = make_server_info(NULL);
1888         if (result == NULL) {
1889                 DEBUG(4, ("make_server_info failed!\n"));
1890                 TALLOC_FREE(sam_account);
1891                 return NT_STATUS_NO_MEMORY;
1892         }
1893
1894         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1895            valid struct samu) */
1896
1897         result->sam_account = sam_account;
1898         result->unix_name = talloc_strdup(result, found_username);
1899
1900         /* Fill in the unix info we found on the way */
1901
1902         result->uid = uid;
1903         result->gid = gid;
1904
1905         /* Create a 'combined' list of all SIDs we might want in the SD */
1906
1907         result->num_sids = 0;
1908         result->sids = NULL;
1909
1910         /* and create (by appending rids) the 'domain' sids */
1911
1912         for (i = 0; i < info3->num_groups2; i++) {
1913                 DOM_SID sid;
1914                 if (!sid_compose(&sid, &info3->dom_sid.sid,
1915                                  info3->gids[i].g_rid)) {
1916                         DEBUG(3,("could not append additional group rid "
1917                                  "0x%x\n", info3->gids[i].g_rid));
1918                         TALLOC_FREE(result);
1919                         return NT_STATUS_INVALID_PARAMETER;
1920                 }
1921                 if (!add_sid_to_array(result, &sid, &result->sids,
1922                                  &result->num_sids)) {
1923                         TALLOC_FREE(result);
1924                         return NT_STATUS_NO_MEMORY;
1925                 }
1926         }
1927
1928         /* Copy 'other' sids.  We need to do sid filtering here to
1929            prevent possible elevation of privileges.  See:
1930
1931            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1932          */
1933
1934         for (i = 0; i < info3->num_other_sids; i++) {
1935                 if (!add_sid_to_array(result, &info3->other_sids[i].sid,
1936                                          &result->sids,
1937                                          &result->num_sids)) {
1938                         TALLOC_FREE(result);
1939                         return NT_STATUS_NO_MEMORY;
1940                 }
1941         }
1942
1943         result->login_server = unistr2_tdup(result,
1944                                             &(info3->uni_logon_srv));
1945
1946         /* ensure we are never given NULL session keys */
1947
1948         if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1949                 result->user_session_key = data_blob(NULL, 0);
1950         } else {
1951                 result->user_session_key = data_blob_talloc(
1952                         result, info3->user_sess_key,
1953                         sizeof(info3->user_sess_key));
1954         }
1955
1956         if (memcmp(info3->lm_sess_key, zeros, 8) == 0) {
1957                 result->lm_session_key = data_blob(NULL, 0);
1958         } else {
1959                 result->lm_session_key = data_blob_talloc(
1960                         result, info3->lm_sess_key,
1961                         sizeof(info3->lm_sess_key));
1962         }
1963
1964         result->was_mapped = username_was_mapped;
1965
1966         *server_info = result;
1967
1968         return NT_STATUS_OK;
1969 }
1970
1971 /***************************************************************************
1972  Free a user_info struct
1973 ***************************************************************************/
1974
1975 void free_user_info(auth_usersupplied_info **user_info)
1976 {
1977         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1978         if (*user_info != NULL) {
1979                 if ((*user_info)->smb_name) {
1980                         DEBUG(10,("structure was created for %s\n",
1981                                   (*user_info)->smb_name));
1982                 }
1983                 SAFE_FREE((*user_info)->smb_name);
1984                 SAFE_FREE((*user_info)->internal_username);
1985                 SAFE_FREE((*user_info)->client_domain);
1986                 SAFE_FREE((*user_info)->domain);
1987                 SAFE_FREE((*user_info)->wksta_name);
1988                 data_blob_free(&(*user_info)->lm_resp);
1989                 data_blob_free(&(*user_info)->nt_resp);
1990                 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1991                 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1992                 data_blob_clear_free(&(*user_info)->plaintext_password);
1993                 ZERO_STRUCT(**user_info);
1994         }
1995         SAFE_FREE(*user_info);
1996 }
1997
1998 /***************************************************************************
1999  Make an auth_methods struct
2000 ***************************************************************************/
2001
2002 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
2003 {
2004         if (!auth_context) {
2005                 smb_panic("no auth_context supplied to "
2006                           "make_auth_methods()!\n");
2007         }
2008
2009         if (!auth_method) {
2010                 smb_panic("make_auth_methods: pointer to auth_method pointer "
2011                           "is NULL!\n");
2012         }
2013
2014         *auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
2015         if (!*auth_method) {
2016                 DEBUG(0,("make_auth_method: malloc failed!\n"));
2017                 return False;
2018         }
2019         ZERO_STRUCTP(*auth_method);
2020
2021         return True;
2022 }
2023
2024 /****************************************************************************
2025  Duplicate a SID token.
2026 ****************************************************************************/
2027
2028 NT_USER_TOKEN *dup_nt_token(TALLOC_CTX *mem_ctx, const NT_USER_TOKEN *ptoken)
2029 {
2030         NT_USER_TOKEN *token;
2031
2032         if (!ptoken)
2033                 return NULL;
2034
2035         token = TALLOC_P(mem_ctx, NT_USER_TOKEN);
2036         if (token == NULL) {
2037                 DEBUG(0, ("talloc failed\n"));
2038                 return NULL;
2039         }
2040
2041         ZERO_STRUCTP(token);
2042
2043         if (ptoken->user_sids && ptoken->num_sids) {
2044                 token->user_sids = (DOM_SID *)talloc_memdup(
2045                         token, ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids );
2046
2047                 if (token->user_sids == NULL) {
2048                         DEBUG(0, ("talloc_memdup failed\n"));
2049                         TALLOC_FREE(token);
2050                         return NULL;
2051                 }
2052                 token->num_sids = ptoken->num_sids;
2053         }
2054
2055         /* copy the privileges; don't consider failure to be critical here */
2056
2057         if ( !se_priv_copy( &token->privileges, &ptoken->privileges ) ) {
2058                 DEBUG(0,("dup_nt_token: Failure to copy SE_PRIV!.  "
2059                          "Continuing with 0 privileges assigned.\n"));
2060         }
2061
2062         return token;
2063 }
2064
2065 /****************************************************************************
2066  Check for a SID in an NT_USER_TOKEN
2067 ****************************************************************************/
2068
2069 BOOL nt_token_check_sid ( const DOM_SID *sid, const NT_USER_TOKEN *token )
2070 {
2071         int i;
2072
2073         if ( !sid || !token )
2074                 return False;
2075
2076         for ( i=0; i<token->num_sids; i++ ) {
2077                 if ( sid_equal( sid, &token->user_sids[i] ) )
2078                         return True;
2079         }
2080
2081         return False;
2082 }
2083
2084 BOOL nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
2085 {
2086         DOM_SID domain_sid;
2087
2088         /* if we are a domain member, the get the domain SID, else for
2089            a DC or standalone server, use our own SID */
2090
2091         if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
2092                 if ( !secrets_fetch_domain_sid( lp_workgroup(),
2093                                                 &domain_sid ) ) {
2094                         DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
2095                                  "SID for domain [%s]\n", lp_workgroup()));
2096                         return False;
2097                 }
2098         }
2099         else
2100                 sid_copy( &domain_sid, get_global_sam_sid() );
2101
2102         sid_append_rid( &domain_sid, rid );
2103
2104         return nt_token_check_sid( &domain_sid, token );\
2105 }
2106
2107 /**
2108  * Verify whether or not given domain is trusted.
2109  *
2110  * @param domain_name name of the domain to be verified
2111  * @return true if domain is one of the trusted once or
2112  *         false if otherwise
2113  **/
2114
2115 BOOL is_trusted_domain(const char* dom_name)
2116 {
2117         DOM_SID trustdom_sid;
2118         BOOL ret;
2119
2120         /* no trusted domains for a standalone server */
2121
2122         if ( lp_server_role() == ROLE_STANDALONE )
2123                 return False;
2124
2125         /* if we are a DC, then check for a direct trust relationships */
2126
2127         if ( IS_DC ) {
2128                 become_root();
2129                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
2130                           "[%s]\n", dom_name ));
2131                 ret = secrets_fetch_trusted_domain_password(dom_name, NULL,
2132                                                             NULL, NULL);
2133                 unbecome_root();
2134                 if (ret)
2135                         return True;
2136         }
2137         else {
2138                 NSS_STATUS result;
2139
2140                 /* If winbind is around, ask it */
2141
2142                 result = wb_is_trusted_domain(dom_name);
2143
2144                 if (result == NSS_STATUS_SUCCESS) {
2145                         return True;
2146                 }
2147
2148                 if (result == NSS_STATUS_NOTFOUND) {
2149                         /* winbind could not find the domain */
2150                         return False;
2151                 }
2152
2153                 /* The only other possible result is that winbind is not up
2154                    and running. We need to update the trustdom_cache
2155                    ourselves */
2156
2157                 update_trustdom_cache();
2158         }
2159
2160         /* now the trustdom cache should be available a DC could still
2161          * have a transitive trust so fall back to the cache of trusted
2162          * domains (like a domain member would use  */
2163
2164         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
2165                 return True;
2166         }
2167
2168         return False;
2169 }
2170