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
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 extern DOM_SID global_sid_World;
  30 extern DOM_SID global_sid_Network;
  31 extern DOM_SID global_sid_Builtin_Guests;
  32 extern DOM_SID global_sid_Authenticated_Users;
  33
  34
  35 /****************************************************************************
  36  Create a UNIX user on demand.
  37 ****************************************************************************/
  38
  39 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  40 {
  41         pstring add_script;
  42         int ret;
  43
  44         pstrcpy(add_script, lp_adduser_script());
  45         if (! *add_script)
  46                 return -1;
  47         all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
  48         if (domain)
  49                 all_string_sub(add_script, "%D", domain, sizeof(pstring));
  50         if (homedir)
  51                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  52         ret = smbrun(add_script,NULL);
  53         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  54         return ret;
  55 }
  56
  57 /****************************************************************************
  58  Add and Delete UNIX users on demand, based on NTSTATUS codes.
  59 ****************************************************************************/
  60
  61 void auth_add_user_script(const char *domain, const char *username)
  62 {
  63         struct passwd *pwd=NULL;
  64
  65         /*
  66          * User validated ok against Domain controller.
  67          * If the admin wants us to try and create a UNIX
  68          * user on the fly, do so.
  69          */
  70
  71         if(lp_adduser_script() && !(pwd = Get_Pwnam(username))) {
  72                 smb_create_user(domain, username, NULL);
  73         }
  74 }
  75
  76 /****************************************************************************
  77  Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
  78  unix info.
  79 ****************************************************************************/
  80
  81 NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account)
  82 {
  83         BOOL pdb_ret;
  84         NTSTATUS nt_status;
  85         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
  86                 return nt_status;
  87         }
  88
  89         become_root();
  90         pdb_ret = pdb_getsampwnam(*account, user);
  91         unbecome_root();
  92
  93         if (!pdb_ret) {
  94
  95                 struct passwd *pass = Get_Pwnam(user);
  96                 if (!pass)
  97                         return NT_STATUS_NO_SUCH_USER;
  98
  99                 if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
 100                         return nt_status;
 101                 }
 102         }
 103         return NT_STATUS_OK;
 104 }
 105
 106 /****************************************************************************
 107  Create an auth_usersupplied_data structure
 108 ****************************************************************************/
 109
 110 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
 111                                const char *smb_name,
 112                                const char *internal_username,
 113                                const char *client_domain,
 114                                const char *domain,
 115                                const char *wksta_name,
 116                                DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 117                                DATA_BLOB plaintext,
 118                                uint32 auth_flags, BOOL encrypted)
 119 {
 120
 121         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
 122
 123         *user_info = malloc(sizeof(**user_info));
 124         if (!user_info) {
 125                 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
 126                 return NT_STATUS_NO_MEMORY;
 127         }
 128
 129         ZERO_STRUCTP(*user_info);
 130
 131         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 132
 133         (*user_info)->smb_name.str = strdup(smb_name);
 134         if ((*user_info)->smb_name.str) {
 135                 (*user_info)->smb_name.len = strlen(smb_name);
 136         } else {
 137                 free_user_info(user_info);
 138                 return NT_STATUS_NO_MEMORY;
 139         }
 140
 141         (*user_info)->internal_username.str = strdup(internal_username);
 142         if ((*user_info)->internal_username.str) {
 143                 (*user_info)->internal_username.len = strlen(internal_username);
 144         } else {
 145                 free_user_info(user_info);
 146                 return NT_STATUS_NO_MEMORY;
 147         }
 148
 149         (*user_info)->domain.str = strdup(domain);
 150         if ((*user_info)->domain.str) {
 151                 (*user_info)->domain.len = strlen(domain);
 152         } else {
 153                 free_user_info(user_info);
 154                 return NT_STATUS_NO_MEMORY;
 155         }
 156
 157         (*user_info)->client_domain.str = strdup(client_domain);
 158         if ((*user_info)->client_domain.str) {
 159                 (*user_info)->client_domain.len = strlen(client_domain);
 160         } else {
 161                 free_user_info(user_info);
 162                 return NT_STATUS_NO_MEMORY;
 163         }
 164
 165         (*user_info)->wksta_name.str = strdup(wksta_name);
 166         if ((*user_info)->wksta_name.str) {
 167                 (*user_info)->wksta_name.len = strlen(wksta_name);
 168         } else {
 169                 free_user_info(user_info);
 170                 return NT_STATUS_NO_MEMORY;
 171         }
 172
 173         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 174
 175         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
 176         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
 177         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
 178
 179         (*user_info)->encrypted = encrypted;
 180         (*user_info)->auth_flags = auth_flags;
 181
 182         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 183
 184         return NT_STATUS_OK;
 185 }
 186
 187 /****************************************************************************
 188  Create an auth_usersupplied_data structure after appropriate mapping.
 189 ****************************************************************************/
 190
 191 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 192                             const char *smb_name,
 193                             const char *client_domain,
 194                             const char *wksta_name,
 195                             DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 196                             DATA_BLOB plaintext,
 197                             uint32 ntlmssp_flags, BOOL encrypted)
 198 {
 199         const char *domain;
 200         fstring internal_username;
 201         fstrcpy(internal_username, smb_name);
 202         map_username(internal_username);
 203
 204         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 205               client_domain, smb_name, wksta_name));
 206
 207         if (lp_allow_trusted_domains() && *client_domain) {
 208
 209                 /* the client could have given us a workstation name
 210                    or other crap for the workgroup - we really need a
 211                    way of telling if this domain name is one of our
 212                    trusted domain names
 213
 214                    Also don't allow "" as a domain, fixes a Win9X bug
 215                    where it doens't supply a domain for logon script
 216                    'net use' commands.
 217
 218                    Finally, we do this by looking up a cache of trusted domains!
 219                 */
 220
 221                 domain = client_domain;
 222
 223                 if (is_trusted_domain(domain)) {
 224                         return make_user_info(user_info, smb_name, internal_username,
 225                                               client_domain, domain, wksta_name,
 226                                               lm_pwd, nt_pwd, plaintext, ntlmssp_flags,
 227                                               encrypted);
 228                 }
 229
 230         } else {
 231                 domain = lp_workgroup();
 232         }
 233
 234         return make_user_info(user_info,
 235                               smb_name, internal_username,
 236                               client_domain, domain,
 237                               wksta_name,
 238                               lm_pwd, nt_pwd,
 239                               plaintext,
 240                               ntlmssp_flags, encrypted);
 241
 242 }
 243
 244 /****************************************************************************
 245  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 246  Decrypt and encrypt the passwords.
 247 ****************************************************************************/
 248
 249 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 250                                      const char *smb_name,
 251                                      const char *client_domain,
 252                                      const char *wksta_name,
 253                                      const uchar *lm_network_pwd, int lm_pwd_len,
 254                                      const uchar *nt_network_pwd, int nt_pwd_len)
 255 {
 256         BOOL ret;
 257         NTSTATUS nt_status;
 258         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 259         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 260         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 261         uint32 auth_flags = AUTH_FLAG_NONE;
 262
 263         if (lm_pwd_len)
 264                 auth_flags |= AUTH_FLAG_LM_RESP;
 265         if (nt_pwd_len == 24) {
 266                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 267         } else if (nt_pwd_len != 0) {
 268                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 269         }
 270
 271         nt_status = make_user_info_map(user_info,
 272                                       smb_name, client_domain,
 273                                   wksta_name,
 274                                       lm_blob, nt_blob,
 275                                       plaintext_blob,
 276                                       auth_flags, True);
 277
 278         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 279
 280         data_blob_free(&lm_blob);
 281         data_blob_free(&nt_blob);
 282         return ret;
 283 }
 284
 285 /****************************************************************************
 286  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 287  Decrypt and encrypt the passwords.
 288 ****************************************************************************/
 289
 290 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 291                                          const char *smb_name,
 292                                          const char *client_domain,
 293                                          const char *wksta_name,
 294                                          const uchar chal[8],
 295                                          const uchar lm_interactive_pwd[16],
 296                                          const uchar nt_interactive_pwd[16],
 297                                          const uchar *dc_sess_key)
 298 {
 299         char lm_pwd[16];
 300         char nt_pwd[16];
 301         unsigned char local_lm_response[24];
 302         unsigned char local_nt_response[24];
 303         unsigned char key[16];
 304         uint32 auth_flags = AUTH_FLAG_NONE;
 305
 306         ZERO_STRUCT(key);
 307         memcpy(key, dc_sess_key, 8);
 308
 309         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 310         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 311
 312 #ifdef DEBUG_PASSWORD
 313         DEBUG(100,("key:"));
 314         dump_data(100, (char *)key, sizeof(key));
 315
 316         DEBUG(100,("lm owf password:"));
 317         dump_data(100, lm_pwd, sizeof(lm_pwd));
 318
 319         DEBUG(100,("nt owf password:"));
 320         dump_data(100, nt_pwd, sizeof(nt_pwd));
 321 #endif
 322
 323         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 324         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 325
 326 #ifdef DEBUG_PASSWORD
 327         DEBUG(100,("decrypt of lm owf password:"));
 328         dump_data(100, lm_pwd, sizeof(lm_pwd));
 329
 330         DEBUG(100,("decrypt of nt owf password:"));
 331         dump_data(100, nt_pwd, sizeof(nt_pwd));
 332 #endif
 333
 334         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 335         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 336
 337         /* Password info paranoia */
 338         ZERO_STRUCT(lm_pwd);
 339         ZERO_STRUCT(nt_pwd);
 340         ZERO_STRUCT(key);
 341
 342         {
 343                 BOOL ret;
 344                 NTSTATUS nt_status;
 345                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 346                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 347                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 348
 349                 if (lm_interactive_pwd)
 350                         auth_flags |= AUTH_FLAG_LM_RESP;
 351                 if (nt_interactive_pwd)
 352                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 353
 354                 nt_status = make_user_info_map(user_info,
 355                                                smb_name, client_domain,
 356                                                wksta_name,
 357                                                local_lm_blob,
 358                                                local_nt_blob,
 359                                                plaintext_blob,
 360                                                auth_flags, True);
 361
 362                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 363                 data_blob_free(&local_lm_blob);
 364                 data_blob_free(&local_nt_blob);
 365                 return ret;
 366         }
 367 }
 368
 369
 370 /****************************************************************************
 371  Create an auth_usersupplied_data structure
 372 ****************************************************************************/
 373
 374 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 375                               const char *smb_name,
 376                               const char *client_domain,
 377                               const uint8 chal[8],
 378                               DATA_BLOB plaintext_password)
 379 {
 380
 381         DATA_BLOB local_lm_blob;
 382         DATA_BLOB local_nt_blob;
 383         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 384         uint32 auth_flags = AUTH_FLAG_NONE;
 385
 386         /*
 387          * Not encrypted - do so.
 388          */
 389
 390         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 391
 392         if (plaintext_password.data) {
 393                 unsigned char local_lm_response[24];
 394
 395 #ifdef DEBUG_PASSWORD
 396                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 397                 dump_data(100, plaintext_password.data, plaintext_password.length);
 398 #endif
 399
 400                 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 401                 local_lm_blob = data_blob(local_lm_response, 24);
 402
 403                 /* We can't do an NT hash here, as the password needs to be
 404                    case insensitive */
 405                 local_nt_blob = data_blob(NULL, 0);
 406
 407                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 408         } else {
 409                 local_lm_blob = data_blob(NULL, 0);
 410                 local_nt_blob = data_blob(NULL, 0);
 411         }
 412
 413         ret = make_user_info_map(user_info, smb_name,
 414                                  client_domain,
 415                                  get_remote_machine_name(),
 416                                  local_lm_blob,
 417                                  local_nt_blob,
 418                                  plaintext_password,
 419                                  auth_flags, False);
 420
 421         data_blob_free(&local_lm_blob);
 422         return NT_STATUS_IS_OK(ret) ? True : False;
 423 }
 424
 425 /****************************************************************************
 426  Create an auth_usersupplied_data structure
 427 ****************************************************************************/
 428
 429 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 430                                       const char *smb_name,
 431                                       const char *client_domain,
 432                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 433 {
 434         uint32 auth_flags = AUTH_FLAG_NONE;
 435
 436         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 437
 438         if (lm_resp.length == 24) {
 439                 auth_flags |= AUTH_FLAG_LM_RESP;
 440         }
 441         if (nt_resp.length == 0) {
 442         } else if (nt_resp.length == 24) {
 443                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 444         } else {
 445                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 446         }
 447
 448         return make_user_info_map(user_info, smb_name,
 449                                  client_domain,
 450                                  get_remote_machine_name(),
 451                                  lm_resp,
 452                                  nt_resp,
 453                                  no_plaintext_blob,
 454                                  auth_flags, True);
 455 }
 456
 457 /****************************************************************************
 458  Create a guest user_info blob, for anonymous authenticaion.
 459 ****************************************************************************/
 460
 461 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 462 {
 463         DATA_BLOB lm_blob = data_blob(NULL, 0);
 464         DATA_BLOB nt_blob = data_blob(NULL, 0);
 465         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 466         uint32 auth_flags = AUTH_FLAG_NONE;
 467         NTSTATUS nt_status;
 468
 469         nt_status = make_user_info(user_info,
 470                               "","",
 471                               "","",
 472                               "",
 473                               nt_blob, lm_blob,
 474                               plaintext_blob,
 475                               auth_flags, True);
 476
 477         return NT_STATUS_IS_OK(nt_status) ? True : False;
 478 }
 479
 480 /****************************************************************************
 481  prints a NT_USER_TOKEN to debug output.
 482 ****************************************************************************/
 483
 484 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 485 {
 486         fstring sid_str;
 487         size_t     i;
 488
 489         if (!token) {
 490                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 491                 return;
 492         }
 493
 494         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 495                                     sid_to_string(sid_str, &token->user_sids[0]) ));
 496         DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
 497         for (i = 0; i < token->num_sids; i++)
 498                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
 499                                                sid_to_string(sid_str, &token->user_sids[i])));
 500 }
 501
 502 /****************************************************************************
 503  prints a UNIX 'token' to debug output.
 504 ****************************************************************************/
 505
 506 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
 507 {
 508         int     i;
 509         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
 510
 511         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
 512         for (i = 0; i < n_groups; i++)
 513                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 514                         (long int)groups[i]));
 515 }
 516
 517 /****************************************************************************
 518  Create the SID list for this user.
 519 ****************************************************************************/
 520
 521 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 522                                      int n_groupSIDs, DOM_SID *groupSIDs,
 523                                      BOOL is_guest, NT_USER_TOKEN **token)
 524 {
 525         NTSTATUS       nt_status = NT_STATUS_OK;
 526         NT_USER_TOKEN *ptoken;
 527         int i;
 528         int sid_ndx;
 529
 530         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 531                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 532                 nt_status = NT_STATUS_NO_MEMORY;
 533                 return nt_status;
 534         }
 535
 536         ZERO_STRUCTP(ptoken);
 537
 538         ptoken->num_sids = n_groupSIDs + 5;
 539
 540         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 541                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 542                 nt_status = NT_STATUS_NO_MEMORY;
 543                 return nt_status;
 544         }
 545
 546         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 547
 548         /*
 549          * Note - user SID *MUST* be first in token !
 550          * se_access_check depends on this.
 551          *
 552          * Primary group SID is second in token. Convention.
 553          */
 554
 555         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 556         if (group_sid)
 557                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 558
 559         /*
 560          * Finally add the "standard" SIDs.
 561          * The only difference between guest and "anonymous" (which we
 562          * don't really support) is the addition of Authenticated_Users.
 563          */
 564
 565         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 566         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 567
 568         if (is_guest)
 569                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 570         else
 571                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 572
 573         sid_ndx = 5; /* next available spot */
 574
 575         for (i = 0; i < n_groupSIDs; i++) {
 576                 size_t check_sid_idx;
 577                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 578                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 579                                       &groupSIDs[i])) {
 580                                 break;
 581                         }
 582                 }
 583
 584                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 585                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 586                 } else {
 587                         ptoken->num_sids--;
 588                 }
 589         }
 590
 591         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 592
 593         *token = ptoken;
 594
 595         return nt_status;
 596 }
 597
 598 /****************************************************************************
 599  Create the SID list for this user.
 600 ****************************************************************************/
 601
 602 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 603 {
 604         DOM_SID user_sid;
 605         DOM_SID group_sid;
 606         DOM_SID *group_sids;
 607         NT_USER_TOKEN *token;
 608         int i;
 609
 610         if (NT_STATUS_IS_ERR(uid_to_sid(&user_sid, uid))) {
 611                 return NULL;
 612         }
 613         if (NT_STATUS_IS_ERR(gid_to_sid(&group_sid, gid))) {
 614                 return NULL;
 615         }
 616
 617         group_sids = malloc(sizeof(DOM_SID) * ngroups);
 618         if (!group_sids) {
 619                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 620                 return NULL;
 621         }
 622
 623         for (i = 0; i < ngroups; i++) {
 624                 if (NT_STATUS_IS_ERR(gid_to_sid(&(group_sids)[i], (groups)[i]))) {
 625                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 626                         SAFE_FREE(group_sids);
 627                         return NULL;
 628                 }
 629         }
 630
 631         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 632                                                   ngroups, group_sids, is_guest, &token))) {
 633                 SAFE_FREE(group_sids);
 634                 return NULL;
 635         }
 636
 637         SAFE_FREE(group_sids);
 638
 639         return token;
 640 }
 641
 642 /******************************************************************************
 643  * this function returns the groups (SIDs) of the local SAM the user is in.
 644  * If this samba server is a DC of the domain the user belongs to, it returns
 645  * both domain groups and local / builtin groups. If the user is in a trusted
 646  * domain, or samba is a member server of a domain, then this function returns
 647  * local and builtin groups the user is a member of.
 648  *
 649  * currently this is a hack, as there is no sam implementation that is capable
 650  * of groups.
 651  ******************************************************************************/
 652
 653 static NTSTATUS get_user_groups_from_local_sam(const char *username, uid_t uid, gid_t gid,
 654                                                int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 655 {
 656         int               n_unix_groups;
 657         int               i;
 658
 659         *n_groups = 0;
 660         *groups   = NULL;
 661
 662         n_unix_groups = groups_max();
 663         if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
 664                 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
 665                 return NT_STATUS_NO_MEMORY;
 666         }
 667
 668         if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 669                 gid_t *groups_tmp;
 670                 groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
 671                 if (!groups_tmp) {
 672                         SAFE_FREE(*unix_groups);
 673                         return NT_STATUS_NO_MEMORY;
 674                 }
 675                 *unix_groups = groups_tmp;
 676
 677                 if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 678                         DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
 679                         SAFE_FREE(*unix_groups);
 680                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 681                 }
 682         }
 683
 684         debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
 685
 686         if (n_unix_groups > 0) {
 687                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 688                 if (!*groups) {
 689                         DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
 690                         SAFE_FREE(*unix_groups);
 691                         return NT_STATUS_NO_MEMORY;
 692                 }
 693         }
 694
 695         *n_groups = n_unix_groups;
 696
 697         for (i = 0; i < *n_groups; i++) {
 698                 if (NT_STATUS_IS_ERR(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) {
 699                         DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
 700                         SAFE_FREE(*groups);
 701                         SAFE_FREE(*unix_groups);
 702                         return NT_STATUS_NO_SUCH_USER;
 703                 }
 704         }
 705
 706         return NT_STATUS_OK;
 707 }
 708
 709 /***************************************************************************
 710  Make a user_info struct
 711 ***************************************************************************/
 712
 713 static NTSTATUS make_server_info(auth_serversupplied_info **server_info)
 714 {
 715         *server_info = malloc(sizeof(**server_info));
 716         if (!*server_info) {
 717                 DEBUG(0,("make_server_info: malloc failed!\n"));
 718                 return NT_STATUS_NO_MEMORY;
 719         }
 720         ZERO_STRUCTP(*server_info);
 721         return NT_STATUS_OK;
 722 }
 723
 724 /***************************************************************************
 725 Fill a server_info struct from a SAM_ACCOUNT with their groups
 726 ***************************************************************************/
 727
 728 static NTSTATUS add_user_groups(auth_serversupplied_info **server_info,
 729                                 SAM_ACCOUNT *sampass,
 730                                 uid_t uid, gid_t gid)
 731 {
 732         NTSTATUS nt_status;
 733         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 734         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 735         int       n_groupSIDs = 0;
 736         DOM_SID  *groupSIDs   = NULL;
 737         gid_t    *unix_groups = NULL;
 738         NT_USER_TOKEN *token;
 739         BOOL is_guest;
 740         uint32 rid;
 741
 742         nt_status = get_user_groups_from_local_sam(pdb_get_username(sampass),
 743                                                    uid, gid,
 744                                                    &n_groupSIDs, &groupSIDs,
 745                                                    &unix_groups);
 746         if (!NT_STATUS_IS_OK(nt_status)) {
 747                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 748                 free_server_info(server_info);
 749                 return nt_status;
 750         }
 751
 752         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 753
 754         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 755                                                               n_groupSIDs, groupSIDs, is_guest,
 756                                                               &token)))
 757         {
 758                 DEBUG(4,("create_nt_user_token failed\n"));
 759                 SAFE_FREE(groupSIDs);
 760                 SAFE_FREE(unix_groups);
 761                 free_server_info(server_info);
 762                 return nt_status;
 763         }
 764
 765         SAFE_FREE(groupSIDs);
 766
 767         (*server_info)->n_groups = n_groupSIDs;
 768         (*server_info)->groups = unix_groups;
 769         (*server_info)->ptok = token;
 770
 771         return nt_status;
 772 }
 773
 774 /***************************************************************************
 775  Make (and fill) a user_info struct from a SAM_ACCOUNT
 776 ***************************************************************************/
 777
 778 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 779                               SAM_ACCOUNT *sampass)
 780 {
 781         NTSTATUS nt_status;
 782
 783         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
 784                 return nt_status;
 785
 786         (*server_info)->sam_account    = sampass;
 787
 788         if (!NT_STATUS_IS_OK(nt_status = sid_to_uid(pdb_get_user_sid(sampass), &((*server_info)->uid))))
 789                 return nt_status;
 790
 791         if (!NT_STATUS_IS_OK(nt_status = sid_to_gid(pdb_get_group_sid(sampass), &((*server_info)->gid))))
 792                 return nt_status;
 793
 794         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass,
 795                                                          (*server_info)->uid, (*server_info)->gid)))
 796                 return nt_status;
 797
 798         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 799         DEBUG(5,("make_server_info_sam: made server info for user %s\n",
 800                  pdb_get_username((*server_info)->sam_account)));
 801
 802         return nt_status;
 803 }
 804
 805 /***************************************************************************
 806  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 807  to a SAM_ACCOUNT
 808 ***************************************************************************/
 809
 810 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 811 {
 812         NTSTATUS nt_status;
 813         SAM_ACCOUNT *sampass = NULL;
 814         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 815                 return nt_status;
 816         }
 817         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
 818                 return nt_status;
 819         }
 820
 821         (*server_info)->sam_account    = sampass;
 822
 823         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass, pwd->pw_uid, pwd->pw_gid))) {
 824                 return nt_status;
 825         }
 826
 827         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 828         (*server_info)->uid = pwd->pw_uid;
 829         (*server_info)->gid = pwd->pw_gid;
 830         return nt_status;
 831 }
 832
 833 /***************************************************************************
 834  Make (and fill) a user_info struct for a guest login.
 835 ***************************************************************************/
 836
 837 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 838 {
 839         NTSTATUS nt_status;
 840         SAM_ACCOUNT *sampass = NULL;
 841         DOM_SID guest_sid;
 842
 843         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 844                 return nt_status;
 845         }
 846
 847         sid_copy(&guest_sid, get_global_sam_sid());
 848         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 849
 850         become_root();
 851         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 852                 unbecome_root();
 853                 return NT_STATUS_NO_SUCH_USER;
 854         }
 855         unbecome_root();
 856
 857         nt_status = make_server_info_sam(server_info, sampass);
 858
 859         if (NT_STATUS_IS_OK(nt_status)) {
 860                 (*server_info)->guest = True;
 861         }
 862
 863         return nt_status;
 864 }
 865
 866 /***************************************************************************
 867  Purely internal function for make_server_info_info3
 868  Fill the sam account from getpwnam
 869 ***************************************************************************/
 870 static NTSTATUS fill_sam_account(const char *domain,
 871                                  const char *username,
 872                                  uid_t *uid, gid_t *gid,
 873                                  SAM_ACCOUNT **sam_account)
 874 {
 875         fstring dom_user;
 876         struct passwd *passwd;
 877
 878         fstr_sprintf(dom_user, "%s%s%s",
 879                      domain, lp_winbind_separator(), username);
 880
 881         passwd = Get_Pwnam(dom_user);
 882
 883         if ( (passwd == NULL) && is_myworkgroup(domain) ) {
 884                 /* For our own domain also try unqualified */
 885                 passwd = Get_Pwnam(username);
 886         }
 887
 888         if (passwd == NULL)
 889                 return NT_STATUS_NO_SUCH_USER;
 890
 891         *uid = passwd->pw_uid;
 892         *gid = passwd->pw_gid;
 893
 894         return pdb_init_sam_pw(sam_account, passwd);
 895 }
 896
 897 /***************************************************************************
 898  Make a server_info struct from the info3 returned by a domain logon
 899 ***************************************************************************/
 900
 901 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 902                                 const char *internal_username,
 903                                 const char *sent_nt_username,
 904                                 const char *domain,
 905                                 auth_serversupplied_info **server_info,
 906                                 NET_USER_INFO_3 *info3)
 907 {
 908         NTSTATUS nt_status = NT_STATUS_OK;
 909
 910         const char *nt_domain;
 911         const char *nt_username;
 912
 913         SAM_ACCOUNT *sam_account = NULL;
 914         DOM_SID user_sid;
 915         DOM_SID group_sid;
 916
 917         struct passwd *passwd;
 918
 919         unid_t u_id, g_id;
 920         uid_t uid;
 921         gid_t gid;
 922         int u_type, g_type;
 923
 924         int n_lgroupSIDs;
 925         DOM_SID *lgroupSIDs   = NULL;
 926
 927         gid_t *unix_groups = NULL;
 928         NT_USER_TOKEN *token;
 929
 930         DOM_SID *all_group_SIDs;
 931         size_t i;
 932
 933         /*
 934            Here is where we should check the list of
 935            trusted domains, and verify that the SID
 936            matches.
 937         */
 938
 939         sid_copy(&user_sid, &info3->dom_sid.sid);
 940         if (!sid_append_rid(&user_sid, info3->user_rid)) {
 941                 return NT_STATUS_INVALID_PARAMETER;
 942         }
 943
 944         sid_copy(&group_sid, &info3->dom_sid.sid);
 945         if (!sid_append_rid(&group_sid, info3->group_rid)) {
 946                 return NT_STATUS_INVALID_PARAMETER;
 947         }
 948
 949         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
 950                 /* If the server didn't give us one, just use the one we sent them */
 951                 nt_username = sent_nt_username;
 952         }
 953
 954         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
 955                 /* If the server didn't give us one, just use the one we sent them */
 956                 domain = domain;
 957         }
 958
 959         u_type = ID_USERID;
 960         g_type = ID_GROUPID;
 961
 962         /* we are trying to check that idmap isn't stuffing us over - does this
 963            user actually exist? */
 964         if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&u_id, &u_type, &user_sid))
 965             && NT_STATUS_IS_OK(idmap_get_id_from_sid(&g_id, &g_type, &group_sid))
 966             && ((passwd = getpwuid_alloc(u_id.uid)))) {
 967
 968                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 969
 970                 uid = passwd->pw_uid;
 971                 gid = passwd->pw_gid;
 972
 973                 /* we should check this is the same name */
 974
 975                 passwd_free(&passwd);
 976         } else {
 977
 978                 /* User not from winbind - try and find them by getpwnam() */
 979                 nt_status = fill_sam_account(nt_domain,
 980                                              internal_username,
 981                                              &uid, &gid,
 982                                              &sam_account);
 983
 984                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
 985                         DEBUG(3,("User %s does not exist, trying to add it\n",
 986                                  internal_username));
 987                         auth_add_user_script(nt_domain, internal_username);
 988                         nt_status = fill_sam_account(nt_domain,
 989                                                      internal_username,
 990                                                      &uid, &gid,
 991                                                      &sam_account);
 992                 }
 993         }
 994
 995         if (!NT_STATUS_IS_OK(nt_status)) {
 996                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
 997                 return nt_status;
 998         }
 999
1000         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1001                 pdb_free_sam(&sam_account);
1002                 return NT_STATUS_UNSUCCESSFUL;
1003         }
1004
1005         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1006                 pdb_free_sam(&sam_account);
1007                 return NT_STATUS_UNSUCCESSFUL;
1008         }
1009
1010         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1011                 pdb_free_sam(&sam_account);
1012                 return NT_STATUS_NO_MEMORY;
1013         }
1014
1015         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1016                 pdb_free_sam(&sam_account);
1017                 return NT_STATUS_NO_MEMORY;
1018         }
1019
1020         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), PDB_CHANGED)) {
1021                 pdb_free_sam(&sam_account);
1022                 return NT_STATUS_NO_MEMORY;
1023         }
1024
1025         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1026                 pdb_free_sam(&sam_account);
1027                 return NT_STATUS_NO_MEMORY;
1028         }
1029
1030         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1031                 pdb_free_sam(&sam_account);
1032                 return NT_STATUS_NO_MEMORY;
1033         }
1034
1035         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1036                 pdb_free_sam(&sam_account);
1037                 return NT_STATUS_NO_MEMORY;
1038         }
1039
1040         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1041                 pdb_free_sam(&sam_account);
1042                 return NT_STATUS_NO_MEMORY;
1043         }
1044
1045         /* now that we have a SAM_ACCOUNT that looks real, make a server_info
1046            to wrap it in, and use pass it on down */
1047
1048         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1049                 DEBUG(4, ("make_server_info failed!\n"));
1050                 pdb_free_sam(&sam_account);
1051                 return nt_status;
1052         }
1053
1054         /* Fill in the unix info we found on the way */
1055
1056         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1057         (*server_info)->uid = uid;
1058         (*server_info)->gid = gid;
1059
1060         /* Store the user group information in the server_info
1061            returned to the caller. */
1062
1063         if (!NT_STATUS_IS_OK(nt_status
1064                              = get_user_groups_from_local_sam(pdb_get_username(sam_account),
1065                                                               uid, gid,
1066                                                               &n_lgroupSIDs,
1067                                                               &lgroupSIDs,
1068                                                               &unix_groups)))
1069         {
1070                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
1071                 return nt_status;
1072         }
1073
1074         (*server_info)->groups = unix_groups;
1075         (*server_info)->n_groups = n_lgroupSIDs;
1076
1077         /* Create a 'combined' list of all SIDs we might want in the SD */
1078         all_group_SIDs   = malloc(sizeof(DOM_SID) *
1079                                   (n_lgroupSIDs + info3->num_groups2 +
1080                                    info3->num_other_sids));
1081         if (!all_group_SIDs) {
1082                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1083                 SAFE_FREE(lgroupSIDs);
1084                 return NT_STATUS_NO_MEMORY;
1085         }
1086
1087         /* Copy the 'local' sids */
1088         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1089         SAFE_FREE(lgroupSIDs);
1090
1091         /* and create (by appending rids) the 'domain' sids */
1092         for (i = 0; i < info3->num_groups2; i++) {
1093                 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1094                 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1095                         nt_status = NT_STATUS_INVALID_PARAMETER;
1096                         DEBUG(3,("could not append additional group rid 0x%x\n",
1097                                 info3->gids[i].g_rid));
1098                         SAFE_FREE(lgroupSIDs);
1099                         return nt_status;
1100                 }
1101         }
1102
1103         /* Copy 'other' sids.  We need to do sid filtering here to
1104            prevent possible elevation of privileges.  See:
1105
1106            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1107          */
1108
1109         for (i = 0; i < info3->num_other_sids; i++)
1110                 sid_copy(&all_group_SIDs[
1111                                  n_lgroupSIDs + info3->num_groups2 + i],
1112                          &info3->other_sids[i].sid);
1113
1114         /* Where are the 'global' sids... */
1115
1116         /* can the user be guest? if yes, where is it stored? */
1117         if (!NT_STATUS_IS_OK(
1118                     nt_status = create_nt_user_token(
1119                             &user_sid, &group_sid,
1120                             n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1121                             all_group_SIDs, False, &token))) {
1122                 DEBUG(4,("create_nt_user_token failed\n"));
1123                 SAFE_FREE(all_group_SIDs);
1124                 return nt_status;
1125         }
1126
1127         (*server_info)->ptok = token;
1128
1129         SAFE_FREE(all_group_SIDs);
1130
1131         memcpy((*server_info)->session_key, info3->user_sess_key, sizeof((*server_info)->session_key)/* 16 */);
1132         memcpy((*server_info)->first_8_lm_hash, info3->padding, 8);
1133
1134         return NT_STATUS_OK;
1135 }
1136
1137 /***************************************************************************
1138  Free a user_info struct
1139 ***************************************************************************/
1140
1141 void free_user_info(auth_usersupplied_info **user_info)
1142 {
1143         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1144         if (*user_info != NULL) {
1145                 if ((*user_info)->smb_name.str) {
1146                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1147                 }
1148                 SAFE_FREE((*user_info)->smb_name.str);
1149                 SAFE_FREE((*user_info)->internal_username.str);
1150                 SAFE_FREE((*user_info)->client_domain.str);
1151                 SAFE_FREE((*user_info)->domain.str);
1152                 SAFE_FREE((*user_info)->wksta_name.str);
1153                 data_blob_free(&(*user_info)->lm_resp);
1154                 data_blob_free(&(*user_info)->nt_resp);
1155                 SAFE_FREE((*user_info)->interactive_password);
1156                 data_blob_clear_free(&(*user_info)->plaintext_password);
1157                 ZERO_STRUCT(**user_info);
1158         }
1159         SAFE_FREE(*user_info);
1160 }
1161
1162 /***************************************************************************
1163  Clear out a server_info struct that has been allocated
1164 ***************************************************************************/
1165
1166 void free_server_info(auth_serversupplied_info **server_info)
1167 {
1168         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1169         if (*server_info != NULL) {
1170                 pdb_free_sam(&(*server_info)->sam_account);
1171
1172                 /* call pam_end here, unless we know we are keeping it */
1173                 delete_nt_token( &(*server_info)->ptok );
1174                 SAFE_FREE((*server_info)->groups);
1175                 ZERO_STRUCT(**server_info);
1176         }
1177         SAFE_FREE(*server_info);
1178 }
1179
1180 /***************************************************************************
1181  Make an auth_methods struct
1182 ***************************************************************************/
1183
1184 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1185 {
1186         if (!auth_context) {
1187                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1188         }
1189
1190         if (!auth_method) {
1191                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1192         }
1193
1194         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1195         if (!*auth_method) {
1196                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1197                 return False;
1198         }
1199         ZERO_STRUCTP(*auth_method);
1200
1201         return True;
1202 }
1203
1204 /****************************************************************************
1205  Delete a SID token.
1206 ****************************************************************************/
1207
1208 void delete_nt_token(NT_USER_TOKEN **pptoken)
1209 {
1210     if (*pptoken) {
1211             NT_USER_TOKEN *ptoken = *pptoken;
1212             SAFE_FREE( ptoken->user_sids );
1213             ZERO_STRUCTP(ptoken);
1214     }
1215     SAFE_FREE(*pptoken);
1216 }
1217
1218 /****************************************************************************
1219  Duplicate a SID token.
1220 ****************************************************************************/
1221
1222 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1223 {
1224         NT_USER_TOKEN *token;
1225
1226         if (!ptoken)
1227                 return NULL;
1228
1229     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1230         return NULL;
1231
1232     ZERO_STRUCTP(token);
1233
1234     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1235         SAFE_FREE(token);
1236         return NULL;
1237     }
1238
1239     token->num_sids = ptoken->num_sids;
1240
1241         return token;
1242 }
1243
1244 /**
1245  * Squash an NT_STATUS in line with security requirements.
1246  * In an attempt to avoid giving the whole game away when users
1247  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1248  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1249  * (session setups in particular).
1250  *
1251  * @param nt_status NTSTATUS input for squashing.
1252  * @return the 'squashed' nt_status
1253  **/
1254
1255 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1256 {
1257         if NT_STATUS_IS_OK(nt_status) {
1258                 return nt_status;
1259         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1260                 /* Match WinXP and don't give the game away */
1261                 return NT_STATUS_LOGON_FAILURE;
1262
1263         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1264                 /* Match WinXP and don't give the game away */
1265                 return NT_STATUS_LOGON_FAILURE;
1266         } else {
1267                 return nt_status;
1268         }
1269 }
1270
1271
1272