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 *unix_user, 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_user, sizeof(pstring));
  48         if (homedir)
  49                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  50         ret = smbrun(add_script,NULL);
  51         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  52         return ret;
  53 }
  54
  55 /****************************************************************************
  56  Add and Delete UNIX users on demand, based on NTSTATUS codes.
  57 ****************************************************************************/
  58
  59 void smb_user_control(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info, NTSTATUS nt_status)
  60 {
  61         struct passwd *pwd=NULL;
  62
  63         if (NT_STATUS_IS_OK(nt_status)) {
  64
  65                 if (!(server_info->sam_fill_level & SAM_FILL_UNIX)) {
  66
  67                         /*
  68                          * User validated ok against Domain controller.
  69                          * If the admin wants us to try and create a UNIX
  70                          * user on the fly, do so.
  71                          */
  72
  73                         if(lp_adduser_script() && !(pwd = Get_Pwnam(user_info->internal_username.str))) {
  74                                 smb_create_user(user_info->internal_username.str, NULL);
  75                         }
  76                 }
  77         }
  78 }
  79
  80 /****************************************************************************
  81  Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
  82  unix info.
  83 ****************************************************************************/
  84
  85 NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account)
  86 {
  87         BOOL pdb_ret;
  88         NTSTATUS nt_status;
  89         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
  90                 return nt_status;
  91         }
  92
  93         become_root();
  94         pdb_ret = pdb_getsampwnam(*account, user);
  95         unbecome_root();
  96
  97         if (!pdb_ret) {
  98
  99                 struct passwd *pass = Get_Pwnam(user);
 100                 if (!pass)
 101                         return NT_STATUS_NO_SUCH_USER;
 102
 103                 if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
 104                         return nt_status;
 105                 }
 106         }
 107         return NT_STATUS_OK;
 108 }
 109
 110 /****************************************************************************
 111  Create an auth_usersupplied_data structure
 112 ****************************************************************************/
 113
 114 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
 115                                const char *smb_name,
 116                                const char *internal_username,
 117                                const char *client_domain,
 118                                const char *domain,
 119                                const char *wksta_name,
 120                                DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 121                                DATA_BLOB plaintext,
 122                                uint32 auth_flags, BOOL encrypted)
 123 {
 124
 125         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
 126
 127         *user_info = malloc(sizeof(**user_info));
 128         if (!user_info) {
 129                 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
 130                 return NT_STATUS_NO_MEMORY;
 131         }
 132
 133         ZERO_STRUCTP(*user_info);
 134
 135         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 136
 137         (*user_info)->smb_name.str = strdup(smb_name);
 138         if ((*user_info)->smb_name.str) {
 139                 (*user_info)->smb_name.len = strlen(smb_name);
 140         } else {
 141                 free_user_info(user_info);
 142                 return NT_STATUS_NO_MEMORY;
 143         }
 144
 145         (*user_info)->internal_username.str = strdup(internal_username);
 146         if ((*user_info)->internal_username.str) {
 147                 (*user_info)->internal_username.len = strlen(internal_username);
 148         } else {
 149                 free_user_info(user_info);
 150                 return NT_STATUS_NO_MEMORY;
 151         }
 152
 153         (*user_info)->domain.str = strdup(domain);
 154         if ((*user_info)->domain.str) {
 155                 (*user_info)->domain.len = strlen(domain);
 156         } else {
 157                 free_user_info(user_info);
 158                 return NT_STATUS_NO_MEMORY;
 159         }
 160
 161         (*user_info)->client_domain.str = strdup(client_domain);
 162         if ((*user_info)->client_domain.str) {
 163                 (*user_info)->client_domain.len = strlen(client_domain);
 164         } else {
 165                 free_user_info(user_info);
 166                 return NT_STATUS_NO_MEMORY;
 167         }
 168
 169         (*user_info)->wksta_name.str = strdup(wksta_name);
 170         if ((*user_info)->wksta_name.str) {
 171                 (*user_info)->wksta_name.len = strlen(wksta_name);
 172         } else {
 173                 free_user_info(user_info);
 174                 return NT_STATUS_NO_MEMORY;
 175         }
 176
 177         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 178
 179         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
 180         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
 181         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
 182
 183         (*user_info)->encrypted = encrypted;
 184         (*user_info)->auth_flags = auth_flags;
 185
 186         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 187
 188         return NT_STATUS_OK;
 189 }
 190
 191 /****************************************************************************
 192  Create an auth_usersupplied_data structure after appropriate mapping.
 193 ****************************************************************************/
 194
 195 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 196                             const char *smb_name,
 197                             const char *client_domain,
 198                             const char *wksta_name,
 199                             DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 200                             DATA_BLOB plaintext,
 201                             uint32 ntlmssp_flags, BOOL encrypted)
 202 {
 203         const char *domain;
 204         fstring internal_username;
 205         fstrcpy(internal_username, smb_name);
 206         map_username(internal_username);
 207
 208         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 209               client_domain, smb_name, wksta_name));
 210
 211         if (lp_allow_trusted_domains() && *client_domain) {
 212
 213                 /* the client could have given us a workstation name
 214                    or other crap for the workgroup - we really need a
 215                    way of telling if this domain name is one of our
 216                    trusted domain names
 217
 218                    Also don't allow "" as a domain, fixes a Win9X bug
 219                    where it doens't supply a domain for logon script
 220                    'net use' commands.
 221
 222                    Finally, we do this by looking up a cache of trusted domains!
 223                 */
 224
 225                 domain = client_domain;
 226
 227                 if (is_trusted_domain(domain)) {
 228                         return make_user_info(user_info, smb_name, internal_username,
 229                                               client_domain, domain, wksta_name,
 230                                               lm_pwd, nt_pwd, plaintext, ntlmssp_flags,
 231                                               encrypted);
 232                 }
 233
 234         } else {
 235                 domain = lp_workgroup();
 236         }
 237
 238         return make_user_info(user_info,
 239                               smb_name, internal_username,
 240                               client_domain, domain,
 241                               wksta_name,
 242                               lm_pwd, nt_pwd,
 243                               plaintext,
 244                               ntlmssp_flags, encrypted);
 245
 246 }
 247
 248 /****************************************************************************
 249  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 250  Decrypt and encrypt the passwords.
 251 ****************************************************************************/
 252
 253 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 254                                      const char *smb_name,
 255                                      const char *client_domain,
 256                                      const char *wksta_name,
 257                                      const uchar *lm_network_pwd, int lm_pwd_len,
 258                                      const uchar *nt_network_pwd, int nt_pwd_len)
 259 {
 260         BOOL ret;
 261         NTSTATUS nt_status;
 262         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 263         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 264         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 265         uint32 auth_flags = AUTH_FLAG_NONE;
 266
 267         if (lm_pwd_len)
 268                 auth_flags |= AUTH_FLAG_LM_RESP;
 269         if (nt_pwd_len == 24) {
 270                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 271         } else if (nt_pwd_len != 0) {
 272                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 273         }
 274
 275         nt_status = make_user_info_map(user_info,
 276                                       smb_name, client_domain,
 277                                   wksta_name,
 278                                       lm_blob, nt_blob,
 279                                       plaintext_blob,
 280                                       auth_flags, True);
 281
 282         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 283
 284         data_blob_free(&lm_blob);
 285         data_blob_free(&nt_blob);
 286         return ret;
 287 }
 288
 289 /****************************************************************************
 290  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 291  Decrypt and encrypt the passwords.
 292 ****************************************************************************/
 293
 294 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 295                                          const char *smb_name,
 296                                          const char *client_domain,
 297                                          const char *wksta_name,
 298                                          const uchar chal[8],
 299                                          const uchar lm_interactive_pwd[16],
 300                                          const uchar nt_interactive_pwd[16],
 301                                          const uchar *dc_sess_key)
 302 {
 303         char lm_pwd[16];
 304         char nt_pwd[16];
 305         unsigned char local_lm_response[24];
 306         unsigned char local_nt_response[24];
 307         unsigned char key[16];
 308         uint32 auth_flags = AUTH_FLAG_NONE;
 309
 310         ZERO_STRUCT(key);
 311         memcpy(key, dc_sess_key, 8);
 312
 313         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 314         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 315
 316 #ifdef DEBUG_PASSWORD
 317         DEBUG(100,("key:"));
 318         dump_data(100, (char *)key, sizeof(key));
 319
 320         DEBUG(100,("lm owf password:"));
 321         dump_data(100, lm_pwd, sizeof(lm_pwd));
 322
 323         DEBUG(100,("nt owf password:"));
 324         dump_data(100, nt_pwd, sizeof(nt_pwd));
 325 #endif
 326
 327         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 328         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 329
 330 #ifdef DEBUG_PASSWORD
 331         DEBUG(100,("decrypt of lm owf password:"));
 332         dump_data(100, lm_pwd, sizeof(lm_pwd));
 333
 334         DEBUG(100,("decrypt of nt owf password:"));
 335         dump_data(100, nt_pwd, sizeof(nt_pwd));
 336 #endif
 337
 338         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 339         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 340
 341         /* Password info paranoia */
 342         ZERO_STRUCT(lm_pwd);
 343         ZERO_STRUCT(nt_pwd);
 344         ZERO_STRUCT(key);
 345
 346         {
 347                 BOOL ret;
 348                 NTSTATUS nt_status;
 349                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 350                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 351                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 352
 353                 if (lm_interactive_pwd)
 354                         auth_flags |= AUTH_FLAG_LM_RESP;
 355                 if (nt_interactive_pwd)
 356                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 357
 358                 nt_status = make_user_info_map(user_info,
 359                                                smb_name, client_domain,
 360                                                wksta_name,
 361                                                local_lm_blob,
 362                                                local_nt_blob,
 363                                                plaintext_blob,
 364                                                auth_flags, True);
 365
 366                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 367                 data_blob_free(&local_lm_blob);
 368                 data_blob_free(&local_nt_blob);
 369                 return ret;
 370         }
 371 }
 372
 373
 374 /****************************************************************************
 375  Create an auth_usersupplied_data structure
 376 ****************************************************************************/
 377
 378 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 379                               const char *smb_name,
 380                               const char *client_domain,
 381                               const uint8 chal[8],
 382                               DATA_BLOB plaintext_password)
 383 {
 384
 385         DATA_BLOB local_lm_blob;
 386         DATA_BLOB local_nt_blob;
 387         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 388         uint32 auth_flags = AUTH_FLAG_NONE;
 389
 390         /*
 391          * Not encrypted - do so.
 392          */
 393
 394         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 395
 396         if (plaintext_password.data) {
 397                 unsigned char local_lm_response[24];
 398
 399 #ifdef DEBUG_PASSWORD
 400                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 401                 dump_data(100, plaintext_password.data, plaintext_password.length);
 402 #endif
 403
 404                 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 405                 local_lm_blob = data_blob(local_lm_response, 24);
 406
 407                 /* We can't do an NT hash here, as the password needs to be
 408                    case insensitive */
 409                 local_nt_blob = data_blob(NULL, 0);
 410
 411                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 412         } else {
 413                 local_lm_blob = data_blob(NULL, 0);
 414                 local_nt_blob = data_blob(NULL, 0);
 415         }
 416
 417         ret = make_user_info_map(user_info, smb_name,
 418                                  client_domain,
 419                                  get_remote_machine_name(),
 420                                  local_lm_blob,
 421                                  local_nt_blob,
 422                                  plaintext_password,
 423                                  auth_flags, False);
 424
 425         data_blob_free(&local_lm_blob);
 426         return NT_STATUS_IS_OK(ret) ? True : False;
 427 }
 428
 429 /****************************************************************************
 430  Create an auth_usersupplied_data structure
 431 ****************************************************************************/
 432
 433 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 434                                       const char *smb_name,
 435                                       const char *client_domain,
 436                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 437 {
 438         uint32 auth_flags = AUTH_FLAG_NONE;
 439
 440         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 441
 442         if (lm_resp.length == 24) {
 443                 auth_flags |= AUTH_FLAG_LM_RESP;
 444         }
 445         if (nt_resp.length == 0) {
 446         } else if (nt_resp.length == 24) {
 447                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 448         } else {
 449                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 450         }
 451
 452         return make_user_info_map(user_info, smb_name,
 453                                  client_domain,
 454                                  get_remote_machine_name(),
 455                                  lm_resp,
 456                                  nt_resp,
 457                                  no_plaintext_blob,
 458                                  auth_flags, True);
 459 }
 460
 461 /****************************************************************************
 462  Create a guest user_info blob, for anonymous authenticaion.
 463 ****************************************************************************/
 464
 465 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 466 {
 467         DATA_BLOB lm_blob = data_blob(NULL, 0);
 468         DATA_BLOB nt_blob = data_blob(NULL, 0);
 469         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 470         uint32 auth_flags = AUTH_FLAG_NONE;
 471         NTSTATUS nt_status;
 472
 473         nt_status = make_user_info(user_info,
 474                               "","",
 475                               "","",
 476                               "",
 477                               nt_blob, lm_blob,
 478                               plaintext_blob,
 479                               auth_flags, True);
 480
 481         return NT_STATUS_IS_OK(nt_status) ? True : False;
 482 }
 483
 484 /****************************************************************************
 485  prints a NT_USER_TOKEN to debug output.
 486 ****************************************************************************/
 487
 488 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 489 {
 490         fstring sid_str;
 491         size_t     i;
 492
 493         if (!token) {
 494                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 495                 return;
 496         }
 497
 498         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 499                                     sid_to_string(sid_str, &token->user_sids[0]) ));
 500         DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
 501         for (i = 0; i < token->num_sids; i++)
 502                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
 503                                                sid_to_string(sid_str, &token->user_sids[i])));
 504 }
 505
 506 /****************************************************************************
 507  prints a UNIX 'token' to debug output.
 508 ****************************************************************************/
 509
 510 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
 511 {
 512         int     i;
 513         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
 514
 515         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
 516         for (i = 0; i < n_groups; i++)
 517                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 518                         (long int)groups[i]));
 519 }
 520
 521 /****************************************************************************
 522  Create the SID list for this user.
 523 ****************************************************************************/
 524
 525 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 526                                      int n_groupSIDs, DOM_SID *groupSIDs,
 527                                      BOOL is_guest, NT_USER_TOKEN **token)
 528 {
 529         NTSTATUS       nt_status = NT_STATUS_OK;
 530         NT_USER_TOKEN *ptoken;
 531         int i;
 532         int sid_ndx;
 533
 534         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 535                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 536                 nt_status = NT_STATUS_NO_MEMORY;
 537                 return nt_status;
 538         }
 539
 540         ZERO_STRUCTP(ptoken);
 541
 542         ptoken->num_sids = n_groupSIDs + 5;
 543
 544         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 545                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 546                 nt_status = NT_STATUS_NO_MEMORY;
 547                 return nt_status;
 548         }
 549
 550         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 551
 552         /*
 553          * Note - user SID *MUST* be first in token !
 554          * se_access_check depends on this.
 555          *
 556          * Primary group SID is second in token. Convention.
 557          */
 558
 559         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 560         if (group_sid)
 561                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 562
 563         /*
 564          * Finally add the "standard" SIDs.
 565          * The only difference between guest and "anonymous" (which we
 566          * don't really support) is the addition of Authenticated_Users.
 567          */
 568
 569         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 570         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 571
 572         if (is_guest)
 573                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 574         else
 575                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 576
 577         sid_ndx = 5; /* next available spot */
 578
 579         for (i = 0; i < n_groupSIDs; i++) {
 580                 size_t check_sid_idx;
 581                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 582                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 583                                       &groupSIDs[i])) {
 584                                 break;
 585                         }
 586                 }
 587
 588                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 589                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 590                 } else {
 591                         ptoken->num_sids--;
 592                 }
 593         }
 594
 595         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 596
 597         *token = ptoken;
 598
 599         return nt_status;
 600 }
 601
 602 /****************************************************************************
 603  Create the SID list for this user.
 604 ****************************************************************************/
 605
 606 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 607 {
 608         DOM_SID user_sid;
 609         DOM_SID group_sid;
 610         DOM_SID *group_sids;
 611         NT_USER_TOKEN *token;
 612         int i;
 613
 614         if (!uid_to_sid(&user_sid, uid)) {
 615                 return NULL;
 616         }
 617         if (!gid_to_sid(&group_sid, gid)) {
 618                 return NULL;
 619         }
 620
 621         group_sids   = malloc(sizeof(DOM_SID) * ngroups);
 622         if (!group_sids) {
 623                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 624                 return NULL;
 625         }
 626
 627         for (i = 0; i < ngroups; i++) {
 628                 if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
 629                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 630                         SAFE_FREE(group_sids);
 631                         return NULL;
 632                 }
 633         }
 634
 635         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 636                                                   ngroups, group_sids, is_guest, &token))) {
 637                 SAFE_FREE(group_sids);
 638                 return NULL;
 639         }
 640
 641         SAFE_FREE(group_sids);
 642
 643         return token;
 644 }
 645
 646 /******************************************************************************
 647  * this function returns the groups (SIDs) of the local SAM the user is in.
 648  * If this samba server is a DC of the domain the user belongs to, it returns
 649  * both domain groups and local / builtin groups. If the user is in a trusted
 650  * domain, or samba is a member server of a domain, then this function returns
 651  * local and builtin groups the user is a member of.
 652  *
 653  * currently this is a hack, as there is no sam implementation that is capable
 654  * of groups.
 655  ******************************************************************************/
 656
 657 static NTSTATUS get_user_groups_from_local_sam(SAM_ACCOUNT *sampass,
 658                                                int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 659 {
 660         uid_t             uid;
 661         gid_t             gid;
 662         int               n_unix_groups;
 663         int               i;
 664         struct passwd    *usr;
 665
 666         *n_groups = 0;
 667         *groups   = NULL;
 668
 669         if (!IS_SAM_UNIX_USER(sampass)) {
 670                 DEBUG(1, ("user %s does not have a unix identity!\n", pdb_get_username(sampass)));
 671                 return NT_STATUS_NO_SUCH_USER;
 672         }
 673
 674         uid = pdb_get_uid(sampass);
 675         gid = pdb_get_gid(sampass);
 676
 677         n_unix_groups = groups_max();
 678         if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
 679                 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
 680                 passwd_free(&usr);
 681                 return NT_STATUS_NO_MEMORY;
 682         }
 683
 684         if (sys_getgrouplist(pdb_get_username(sampass), gid, *unix_groups, &n_unix_groups) == -1) {
 685                 gid_t *groups_tmp;
 686                 groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
 687                 if (!groups_tmp) {
 688                         SAFE_FREE(*unix_groups);
 689                         passwd_free(&usr);
 690                         return NT_STATUS_NO_MEMORY;
 691                 }
 692                 *unix_groups = groups_tmp;
 693
 694                 if (sys_getgrouplist(pdb_get_username(sampass), gid, *unix_groups, &n_unix_groups) == -1) {
 695                         DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
 696                         SAFE_FREE(*unix_groups);
 697                         passwd_free(&usr);
 698                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 699                 }
 700         }
 701
 702         debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
 703
 704         if (n_unix_groups > 0) {
 705                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 706                 if (!*groups) {
 707                         DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
 708                         SAFE_FREE(*unix_groups);
 709                         return NT_STATUS_NO_MEMORY;
 710                 }
 711         }
 712
 713         *n_groups = n_unix_groups;
 714
 715         for (i = 0; i < *n_groups; i++) {
 716                 if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
 717                         DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
 718                         SAFE_FREE(*groups);
 719                         SAFE_FREE(*unix_groups);
 720                         return NT_STATUS_NO_SUCH_USER;
 721                 }
 722         }
 723
 724         return NT_STATUS_OK;
 725 }
 726
 727 /***************************************************************************
 728  Make a user_info struct
 729 ***************************************************************************/
 730
 731 static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
 732 {
 733         *server_info = malloc(sizeof(**server_info));
 734         if (!*server_info) {
 735                 DEBUG(0,("make_server_info: malloc failed!\n"));
 736                 return NT_STATUS_NO_MEMORY;
 737         }
 738         ZERO_STRUCTP(*server_info);
 739
 740         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 741         (*server_info)->sam_account    = sampass;
 742
 743         return NT_STATUS_OK;
 744 }
 745
 746 /***************************************************************************
 747  Make (and fill) a user_info struct from a SAM_ACCOUNT
 748 ***************************************************************************/
 749
 750 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 751                               SAM_ACCOUNT *sampass)
 752 {
 753         NTSTATUS nt_status = NT_STATUS_OK;
 754         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 755         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 756         int       n_groupSIDs = 0;
 757         DOM_SID  *groupSIDs   = NULL;
 758         gid_t    *unix_groups = NULL;
 759         NT_USER_TOKEN *token;
 760         BOOL is_guest;
 761         uint32 rid;
 762
 763         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
 764                 return nt_status;
 765         }
 766
 767         if (!NT_STATUS_IS_OK(nt_status
 768                              = get_user_groups_from_local_sam(sampass,
 769                 &n_groupSIDs, &groupSIDs, &unix_groups)))
 770         {
 771                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 772                 free_server_info(server_info);
 773                 return nt_status;
 774         }
 775
 776         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 777
 778         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 779                                                               n_groupSIDs, groupSIDs, is_guest,
 780                                                               &token)))
 781         {
 782                 DEBUG(4,("create_nt_user_token failed\n"));
 783                 SAFE_FREE(groupSIDs);
 784                 SAFE_FREE(unix_groups);
 785                 free_server_info(server_info);
 786                 return nt_status;
 787         }
 788
 789         SAFE_FREE(groupSIDs);
 790
 791         (*server_info)->n_groups = n_groupSIDs;
 792         (*server_info)->groups = unix_groups;
 793
 794         (*server_info)->ptok = token;
 795
 796         DEBUG(5,("make_server_info_sam: made server info for user %s\n",
 797                  pdb_get_username((*server_info)->sam_account)));
 798
 799         return nt_status;
 800 }
 801
 802 /***************************************************************************
 803  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 804  to a SAM_ACCOUNT
 805 ***************************************************************************/
 806
 807 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 808 {
 809         NTSTATUS nt_status;
 810         SAM_ACCOUNT *sampass = NULL;
 811         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 812                 return nt_status;
 813         }
 814         return make_server_info_sam(server_info, sampass);
 815 }
 816
 817 /***************************************************************************
 818  Make (and fill) a user_info struct for a guest login.
 819 ***************************************************************************/
 820
 821 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 822 {
 823         NTSTATUS nt_status;
 824         SAM_ACCOUNT *sampass = NULL;
 825         DOM_SID guest_sid;
 826
 827         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 828                 return nt_status;
 829         }
 830
 831         sid_copy(&guest_sid, get_global_sam_sid());
 832         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 833
 834         become_root();
 835         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 836                 unbecome_root();
 837                 return NT_STATUS_NO_SUCH_USER;
 838         }
 839         unbecome_root();
 840
 841         nt_status = make_server_info_sam(server_info, sampass);
 842
 843         if (NT_STATUS_IS_OK(nt_status)) {
 844                 (*server_info)->guest = True;
 845         }
 846
 847         return nt_status;
 848 }
 849
 850 /***************************************************************************
 851  Make a server_info struct from the info3 returned by a domain logon
 852 ***************************************************************************/
 853
 854 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 855                                 const char *internal_username,
 856                                 const char *sent_nt_username,
 857                                 const char *domain,
 858                                 auth_serversupplied_info **server_info,
 859                                 NET_USER_INFO_3 *info3)
 860 {
 861         NTSTATUS nt_status = NT_STATUS_OK;
 862
 863         const char *nt_domain;
 864         const char *nt_username;
 865
 866         SAM_ACCOUNT *sam_account = NULL;
 867         DOM_SID user_sid;
 868         DOM_SID group_sid;
 869
 870         struct passwd *passwd;
 871
 872         uid_t uid;
 873         gid_t gid;
 874
 875         int n_lgroupSIDs;
 876         DOM_SID *lgroupSIDs   = NULL;
 877
 878         gid_t *unix_groups = NULL;
 879         NT_USER_TOKEN *token;
 880
 881         DOM_SID *all_group_SIDs;
 882         size_t i;
 883
 884         /*
 885            Here is where we should check the list of
 886            trusted domains, and verify that the SID
 887            matches.
 888         */
 889
 890         sid_copy(&user_sid, &info3->dom_sid.sid);
 891         if (!sid_append_rid(&user_sid, info3->user_rid)) {
 892                 return NT_STATUS_INVALID_PARAMETER;
 893         }
 894
 895         sid_copy(&group_sid, &info3->dom_sid.sid);
 896         if (!sid_append_rid(&group_sid, info3->group_rid)) {
 897                 return NT_STATUS_INVALID_PARAMETER;
 898         }
 899
 900         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
 901                 /* If the server didn't give us one, just use the one we sent them */
 902                 nt_username = sent_nt_username;
 903         }
 904
 905         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
 906                 /* If the server didn't give us one, just use the one we sent them */
 907                 domain = domain;
 908         }
 909
 910         if (winbind_sid_to_uid(&uid, &user_sid)
 911             && winbind_sid_to_gid(&gid, &group_sid)
 912             && ((passwd = getpwuid_alloc(uid)))) {
 913                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 914                 passwd_free(&passwd);
 915         } else {
 916                 char *dom_user;
 917                 dom_user = talloc_asprintf(mem_ctx, "%s%s%s",
 918                                            nt_domain,
 919                                            lp_winbind_separator(),
 920                                            internal_username);
 921
 922                 if (!dom_user) {
 923                         DEBUG(0, ("talloc_asprintf failed!\n"));
 924                         return NT_STATUS_NO_MEMORY;
 925                 } else {
 926
 927                         if (!(passwd = Get_Pwnam(dom_user))
 928                                 /* Only lookup local for the local
 929                                    domain, we don't want this for
 930                                    trusted domains */
 931                             && strequal(nt_domain, lp_workgroup())) {
 932                                 passwd = Get_Pwnam(internal_username);
 933                         }
 934
 935                         if (!passwd) {
 936                                 return NT_STATUS_NO_SUCH_USER;
 937                         } else {
 938                                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 939                         }
 940                 }
 941         }
 942
 943         if (!NT_STATUS_IS_OK(nt_status)) {
 944                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
 945                 return nt_status;
 946         }
 947
 948         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
 949                 pdb_free_sam(&sam_account);
 950                 return NT_STATUS_UNSUCCESSFUL;
 951         }
 952
 953         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
 954                 pdb_free_sam(&sam_account);
 955                 return NT_STATUS_UNSUCCESSFUL;
 956         }
 957
 958         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
 959                 pdb_free_sam(&sam_account);
 960                 return NT_STATUS_NO_MEMORY;
 961         }
 962
 963         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
 964                 pdb_free_sam(&sam_account);
 965                 return NT_STATUS_NO_MEMORY;
 966         }
 967
 968         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), PDB_CHANGED)) {
 969                 pdb_free_sam(&sam_account);
 970                 return NT_STATUS_NO_MEMORY;
 971         }
 972
 973         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
 974                 pdb_free_sam(&sam_account);
 975                 return NT_STATUS_NO_MEMORY;
 976         }
 977
 978         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
 979                 pdb_free_sam(&sam_account);
 980                 return NT_STATUS_NO_MEMORY;
 981         }
 982
 983         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
 984                 pdb_free_sam(&sam_account);
 985                 return NT_STATUS_NO_MEMORY;
 986         }
 987
 988         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
 989                 pdb_free_sam(&sam_account);
 990                 return NT_STATUS_NO_MEMORY;
 991         }
 992
 993         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
 994                 DEBUG(4, ("make_server_info failed!\n"));
 995                 pdb_free_sam(&sam_account);
 996                 return nt_status;
 997         }
 998
 999         /* Store the user group information in the server_info
1000            returned to the caller. */
1001
1002         if (!NT_STATUS_IS_OK(nt_status
1003                              = get_user_groups_from_local_sam(sam_account,
1004                                                               &n_lgroupSIDs,
1005                                                               &lgroupSIDs,
1006                                                               &unix_groups)))
1007         {
1008                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
1009                 return nt_status;
1010         }
1011
1012         (*server_info)->groups = unix_groups;
1013         (*server_info)->n_groups = n_lgroupSIDs;
1014
1015         /* Create a 'combined' list of all SIDs we might want in the SD */
1016         all_group_SIDs   = malloc(sizeof(DOM_SID) *
1017                                   (n_lgroupSIDs + info3->num_groups2 +
1018                                    info3->num_other_sids));
1019         if (!all_group_SIDs) {
1020                 DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
1021                 SAFE_FREE(lgroupSIDs);
1022                 return NT_STATUS_NO_MEMORY;
1023         }
1024
1025         /* Copy the 'local' sids */
1026         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1027         SAFE_FREE(lgroupSIDs);
1028
1029         /* and create (by appending rids) the 'domain' sids */
1030         for (i = 0; i < info3->num_groups2; i++) {
1031                 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1032                 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1033                         nt_status = NT_STATUS_INVALID_PARAMETER;
1034                         DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
1035                                 info3->gids[i].g_rid));
1036                         SAFE_FREE(lgroupSIDs);
1037                         return nt_status;
1038                 }
1039         }
1040
1041         /* Copy 'other' sids.  We need to do sid filtering here to
1042            prevent possible elevation of privileges.  See:
1043
1044            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1045          */
1046
1047         for (i = 0; i < info3->num_other_sids; i++)
1048                 sid_copy(&all_group_SIDs[
1049                                  n_lgroupSIDs + info3->num_groups2 + i],
1050                          &info3->other_sids[i].sid);
1051
1052         /* Where are the 'global' sids... */
1053
1054         /* can the user be guest? if yes, where is it stored? */
1055         if (!NT_STATUS_IS_OK(
1056                     nt_status = create_nt_user_token(
1057                             &user_sid, &group_sid,
1058                             n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1059                             all_group_SIDs, False, &token))) {
1060                 DEBUG(4,("create_nt_user_token failed\n"));
1061                 SAFE_FREE(all_group_SIDs);
1062                 return nt_status;
1063         }
1064
1065         (*server_info)->ptok = token;
1066
1067         SAFE_FREE(all_group_SIDs);
1068
1069         memcpy((*server_info)->session_key, info3->user_sess_key, sizeof((*server_info)->session_key)/* 16 */);
1070         memcpy((*server_info)->first_8_lm_hash, info3->padding, 8);
1071
1072         return NT_STATUS_OK;
1073 }
1074
1075 /***************************************************************************
1076  Free a user_info struct
1077 ***************************************************************************/
1078
1079 void free_user_info(auth_usersupplied_info **user_info)
1080 {
1081         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1082         if (*user_info != NULL) {
1083                 if ((*user_info)->smb_name.str) {
1084                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1085                 }
1086                 SAFE_FREE((*user_info)->smb_name.str);
1087                 SAFE_FREE((*user_info)->internal_username.str);
1088                 SAFE_FREE((*user_info)->client_domain.str);
1089                 SAFE_FREE((*user_info)->domain.str);
1090                 SAFE_FREE((*user_info)->wksta_name.str);
1091                 data_blob_free(&(*user_info)->lm_resp);
1092                 data_blob_free(&(*user_info)->nt_resp);
1093                 SAFE_FREE((*user_info)->interactive_password);
1094                 data_blob_clear_free(&(*user_info)->plaintext_password);
1095                 ZERO_STRUCT(**user_info);
1096         }
1097         SAFE_FREE(*user_info);
1098 }
1099
1100 /***************************************************************************
1101  Clear out a server_info struct that has been allocated
1102 ***************************************************************************/
1103
1104 void free_server_info(auth_serversupplied_info **server_info)
1105 {
1106         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1107         if (*server_info != NULL) {
1108                 pdb_free_sam(&(*server_info)->sam_account);
1109
1110                 /* call pam_end here, unless we know we are keeping it */
1111                 delete_nt_token( &(*server_info)->ptok );
1112                 SAFE_FREE((*server_info)->groups);
1113                 ZERO_STRUCT(**server_info);
1114         }
1115         SAFE_FREE(*server_info);
1116 }
1117
1118 /***************************************************************************
1119  Make an auth_methods struct
1120 ***************************************************************************/
1121
1122 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1123 {
1124         if (!auth_context) {
1125                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1126         }
1127
1128         if (!auth_method) {
1129                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1130         }
1131
1132         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1133         if (!*auth_method) {
1134                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1135                 return False;
1136         }
1137         ZERO_STRUCTP(*auth_method);
1138
1139         return True;
1140 }
1141
1142 /****************************************************************************
1143  Delete a SID token.
1144 ****************************************************************************/
1145
1146 void delete_nt_token(NT_USER_TOKEN **pptoken)
1147 {
1148     if (*pptoken) {
1149             NT_USER_TOKEN *ptoken = *pptoken;
1150             SAFE_FREE( ptoken->user_sids );
1151             ZERO_STRUCTP(ptoken);
1152     }
1153     SAFE_FREE(*pptoken);
1154 }
1155
1156 /****************************************************************************
1157  Duplicate a SID token.
1158 ****************************************************************************/
1159
1160 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1161 {
1162         NT_USER_TOKEN *token;
1163
1164         if (!ptoken)
1165                 return NULL;
1166
1167     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1168         return NULL;
1169
1170     ZERO_STRUCTP(token);
1171
1172     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1173         SAFE_FREE(token);
1174         return NULL;
1175     }
1176
1177     token->num_sids = ptoken->num_sids;
1178
1179         return token;
1180 }
1181
1182 /**
1183  * Squash an NT_STATUS in line with security requirements.
1184  * In an attempt to avoid giving the whole game away when users
1185  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1186  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1187  * (session setups in particular).
1188  *
1189  * @param nt_status NTSTATUS input for squashing.
1190  * @return the 'squashed' nt_status
1191  **/
1192
1193 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1194 {
1195         if NT_STATUS_IS_OK(nt_status) {
1196                 return nt_status;
1197         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1198                 /* Match WinXP and don't give the game away */
1199                 return NT_STATUS_LOGON_FAILURE;
1200
1201         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1202                 /* Match WinXP and don't give the game away */
1203                 return NT_STATUS_LOGON_FAILURE;
1204         } else {
1205                 return nt_status;
1206         }
1207 }
1208
1209
1210