source/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001
   6    Copyright (C) Jeremy Allison 2000-2001
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_AUTH
  27
  28 extern pstring global_myname;
  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 an auth_usersupplied_data structure
  82 ****************************************************************************/
  83
  84 static BOOL make_user_info(auth_usersupplied_info **user_info,
  85                            const char *smb_name,
  86                            const char *internal_username,
  87                            const char *client_domain,
  88                            const char *domain,
  89                            const char *wksta_name,
  90                            DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
  91                            DATA_BLOB plaintext,
  92                            uint32 auth_flags, BOOL encrypted)
  93 {
  94
  95         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
  96
  97         *user_info = malloc(sizeof(**user_info));
  98         if (!user_info) {
  99                 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
 100                 return False;
 101         }
 102
 103         ZERO_STRUCTP(*user_info);
 104
 105         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 106
 107         (*user_info)->smb_name.str = strdup(smb_name);
 108         if ((*user_info)->smb_name.str) {
 109                 (*user_info)->smb_name.len = strlen(smb_name);
 110         } else {
 111                 free_user_info(user_info);
 112                 return False;
 113         }
 114
 115         (*user_info)->internal_username.str = strdup(internal_username);
 116         if ((*user_info)->internal_username.str) {
 117                 (*user_info)->internal_username.len = strlen(internal_username);
 118         } else {
 119                 free_user_info(user_info);
 120                 return False;
 121         }
 122
 123         (*user_info)->domain.str = strdup(domain);
 124         if ((*user_info)->domain.str) {
 125                 (*user_info)->domain.len = strlen(domain);
 126         } else {
 127                 free_user_info(user_info);
 128                 return False;
 129         }
 130
 131         (*user_info)->client_domain.str = strdup(client_domain);
 132         if ((*user_info)->client_domain.str) {
 133                 (*user_info)->client_domain.len = strlen(client_domain);
 134         } else {
 135                 free_user_info(user_info);
 136                 return False;
 137         }
 138
 139         (*user_info)->wksta_name.str = strdup(wksta_name);
 140         if ((*user_info)->wksta_name.str) {
 141                 (*user_info)->wksta_name.len = strlen(wksta_name);
 142         } else {
 143                 free_user_info(user_info);
 144                 return False;
 145         }
 146
 147         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 148
 149         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
 150         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
 151         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
 152
 153         (*user_info)->encrypted = encrypted;
 154         (*user_info)->auth_flags = auth_flags;
 155
 156         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 157
 158         return True;
 159 }
 160
 161 /****************************************************************************
 162  Create an auth_usersupplied_data structure after appropriate mapping.
 163 ****************************************************************************/
 164
 165 BOOL make_user_info_map(auth_usersupplied_info **user_info,
 166                         const char *smb_name,
 167                         const char *client_domain,
 168                         const char *wksta_name,
 169                         DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 170                         DATA_BLOB plaintext,
 171                         uint32 ntlmssp_flags, BOOL encrypted)
 172 {
 173         const char *domain;
 174         fstring internal_username;
 175         fstrcpy(internal_username, smb_name);
 176         map_username(internal_username);
 177
 178         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 179               client_domain, smb_name, wksta_name));
 180
 181         if (lp_allow_trusted_domains() && *client_domain) {
 182
 183                 /* the client could have given us a workstation name
 184                    or other crap for the workgroup - we really need a
 185                    way of telling if this domain name is one of our
 186                    trusted domain names
 187
 188                    Also don't allow "" as a domain, fixes a Win9X bug
 189                    where it doens't supply a domain for logon script
 190                    'net use' commands.
 191
 192                    The way I do it here is by checking if the fully
 193                    qualified username exists. This is rather reliant
 194                    on winbind, but until we have a better method this
 195                    will have to do
 196                 */
 197
 198                 domain = client_domain;
 199
 200                 if ((smb_name) && (*smb_name)) { /* Don't do this for guests */
 201                         char *user = NULL;
 202                         if (asprintf(&user, "%s%s%s",
 203                                  client_domain, lp_winbind_separator(),
 204                                  smb_name) < 0) {
 205                                 DEBUG(0, ("make_user_info_map: asprintf() failed!\n"));
 206                                 return False;
 207                         }
 208
 209                         DEBUG(5, ("make_user_info_map: testing for user %s\n", user));
 210
 211                         if (Get_Pwnam(user) == NULL) {
 212                                 DEBUG(5, ("make_user_info_map: test for user %s failed\n", user));
 213                                 domain = lp_workgroup();
 214                                 DEBUG(5, ("make_user_info_map: trusted domain %s doesn't appear to exist, using %s\n",
 215                                           client_domain, domain));
 216                         } else {
 217                                 DEBUG(5, ("make_user_info_map: using trusted domain %s\n", domain));
 218                         }
 219                         SAFE_FREE(user);
 220                 }
 221         } else {
 222                 domain = lp_workgroup();
 223         }
 224
 225         return make_user_info(user_info,
 226                               smb_name, internal_username,
 227                               client_domain, domain,
 228                               wksta_name,
 229                               lm_pwd, nt_pwd,
 230                               plaintext,
 231                               ntlmssp_flags, encrypted);
 232
 233 }
 234
 235 /****************************************************************************
 236  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 237  Decrypt and encrypt the passwords.
 238 ****************************************************************************/
 239
 240 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 241                                      const char *smb_name,
 242                                      const char *client_domain,
 243                                      const char *wksta_name,
 244                                      const uchar *lm_network_pwd, int lm_pwd_len,
 245                                      const uchar *nt_network_pwd, int nt_pwd_len)
 246 {
 247         BOOL ret;
 248         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 249         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 250         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 251         uint32 auth_flags = AUTH_FLAG_NONE;
 252
 253         if (lm_pwd_len)
 254                 auth_flags |= AUTH_FLAG_LM_RESP;
 255         if (nt_pwd_len == 24) {
 256                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 257         } else if (nt_pwd_len != 0) {
 258                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 259         }
 260
 261         ret = make_user_info_map(user_info,
 262                                  smb_name, client_domain,
 263                                  wksta_name,
 264                                  lm_blob, nt_blob,
 265                                  plaintext_blob,
 266                                  auth_flags, True);
 267
 268         data_blob_free(&lm_blob);
 269         data_blob_free(&nt_blob);
 270         return ret;
 271 }
 272
 273 /****************************************************************************
 274  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 275  Decrypt and encrypt the passwords.
 276 ****************************************************************************/
 277
 278 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 279                                          const char *smb_name,
 280                                          const char *client_domain,
 281                                          const char *wksta_name,
 282                                          const uchar chal[8],
 283                                          const uchar lm_interactive_pwd[16],
 284                                          const uchar nt_interactive_pwd[16],
 285                                          const uchar *dc_sess_key)
 286 {
 287         char lm_pwd[16];
 288         char nt_pwd[16];
 289         unsigned char local_lm_response[24];
 290         unsigned char local_nt_response[24];
 291         unsigned char key[16];
 292         uint32 auth_flags = AUTH_FLAG_NONE;
 293
 294         ZERO_STRUCT(key);
 295         memcpy(key, dc_sess_key, 8);
 296
 297         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 298         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 299
 300 #ifdef DEBUG_PASSWORD
 301         DEBUG(100,("key:"));
 302         dump_data(100, (char *)key, sizeof(key));
 303
 304         DEBUG(100,("lm owf password:"));
 305         dump_data(100, lm_pwd, sizeof(lm_pwd));
 306
 307         DEBUG(100,("nt owf password:"));
 308         dump_data(100, nt_pwd, sizeof(nt_pwd));
 309 #endif
 310
 311         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 312         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 313
 314 #ifdef DEBUG_PASSWORD
 315         DEBUG(100,("decrypt of lm owf password:"));
 316         dump_data(100, lm_pwd, sizeof(lm_pwd));
 317
 318         DEBUG(100,("decrypt of nt owf password:"));
 319         dump_data(100, nt_pwd, sizeof(nt_pwd));
 320 #endif
 321
 322         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 323         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 324
 325         /* Password info paranoia */
 326         ZERO_STRUCT(lm_pwd);
 327         ZERO_STRUCT(nt_pwd);
 328         ZERO_STRUCT(key);
 329
 330         {
 331                 BOOL ret;
 332                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 333                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 334                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 335
 336                 if (lm_interactive_pwd)
 337                         auth_flags |= AUTH_FLAG_LM_RESP;
 338                 if (nt_interactive_pwd)
 339                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 340
 341                 ret = make_user_info_map(user_info,
 342                                          smb_name, client_domain,
 343                                          wksta_name,
 344                                          local_lm_blob,
 345                                          local_nt_blob,
 346                                          plaintext_blob,
 347                                          auth_flags, True);
 348
 349                 data_blob_free(&local_lm_blob);
 350                 data_blob_free(&local_nt_blob);
 351                 return ret;
 352         }
 353 }
 354
 355
 356 /****************************************************************************
 357  Create an auth_usersupplied_data structure
 358 ****************************************************************************/
 359
 360 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 361                               const char *smb_name,
 362                               const char *client_domain,
 363                               const uint8 chal[8],
 364                               DATA_BLOB plaintext_password)
 365 {
 366
 367         DATA_BLOB local_lm_blob;
 368         DATA_BLOB local_nt_blob;
 369         BOOL ret = False;
 370         uint32 auth_flags = AUTH_FLAG_NONE;
 371
 372         /*
 373          * Not encrypted - do so.
 374          */
 375
 376         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 377
 378         if (plaintext_password.data) {
 379                 unsigned char local_lm_response[24];
 380
 381 #ifdef DEBUG_PASSWORD
 382                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 383                 dump_data(100, plaintext_password.data, plaintext_password.length);
 384 #endif
 385
 386                 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 387                 local_lm_blob = data_blob(local_lm_response, 24);
 388
 389                 /* We can't do an NT hash here, as the password needs to be
 390                    case insensitive */
 391                 local_nt_blob = data_blob(NULL, 0);
 392
 393                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 394         } else {
 395                 local_lm_blob = data_blob(NULL, 0);
 396                 local_nt_blob = data_blob(NULL, 0);
 397         }
 398
 399         ret = make_user_info_map(user_info, smb_name,
 400                                  client_domain,
 401                                  get_remote_machine_name(),
 402                                  local_lm_blob,
 403                                  local_nt_blob,
 404                                  plaintext_password,
 405                                  auth_flags, False);
 406
 407         data_blob_free(&local_lm_blob);
 408         return ret;
 409 }
 410
 411 /****************************************************************************
 412  Create an auth_usersupplied_data structure
 413 ****************************************************************************/
 414
 415 BOOL make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 416                                   const char *smb_name,
 417                                   const char *client_domain,
 418                                   DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 419 {
 420         uint32 auth_flags = AUTH_FLAG_NONE;
 421
 422         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 423
 424         if (lm_resp.length == 24) {
 425                 auth_flags |= AUTH_FLAG_LM_RESP;
 426         }
 427         if (nt_resp.length == 0) {
 428         } else if (nt_resp.length == 24) {
 429                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 430         } else {
 431                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 432         }
 433
 434         return make_user_info_map(user_info, smb_name,
 435                                  client_domain,
 436                                  get_remote_machine_name(),
 437                                  lm_resp,
 438                                  nt_resp,
 439                                  no_plaintext_blob,
 440                                  auth_flags, True);
 441 }
 442
 443 /****************************************************************************
 444  Create a guest user_info blob, for anonymous authenticaion.
 445 ****************************************************************************/
 446
 447 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 448 {
 449         DATA_BLOB lm_blob = data_blob(NULL, 0);
 450         DATA_BLOB nt_blob = data_blob(NULL, 0);
 451         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 452         uint32 auth_flags = AUTH_FLAG_NONE;
 453
 454         return make_user_info(user_info,
 455                               "","",
 456                               "","",
 457                               "",
 458                               nt_blob, lm_blob,
 459                               plaintext_blob,
 460                               auth_flags, True);
 461 }
 462
 463 /****************************************************************************
 464  prints a NT_USER_TOKEN to debug output.
 465 ****************************************************************************/
 466
 467 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 468 {
 469         fstring sid_str;
 470         int     i;
 471
 472         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 473                 sid_to_string(sid_str, &token->user_sids[0]) ));
 474         DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
 475         for (i = 0; i < token->num_sids; i++)
 476                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
 477                         sid_to_string(sid_str, &token->user_sids[i])));
 478 }
 479
 480 /****************************************************************************
 481  Create the SID list for this user.
 482 ****************************************************************************/
 483
 484 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 485                                      int n_groupSIDs, DOM_SID *groupSIDs,
 486                                      BOOL is_guest, NT_USER_TOKEN **token)
 487 {
 488         NTSTATUS       nt_status = NT_STATUS_OK;
 489         NT_USER_TOKEN *ptoken;
 490         int i;
 491         int sid_ndx;
 492
 493         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 494                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 495                 nt_status = NT_STATUS_NO_MEMORY;
 496                 return nt_status;
 497         }
 498
 499         ZERO_STRUCTP(ptoken);
 500
 501         ptoken->num_sids = n_groupSIDs + 5;
 502
 503         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 504                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 505                 nt_status = NT_STATUS_NO_MEMORY;
 506                 return nt_status;
 507         }
 508
 509         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 510
 511         /*
 512          * Note - user SID *MUST* be first in token !
 513          * se_access_check depends on this.
 514          *
 515          * Primary group SID is second in token. Convention.
 516          */
 517
 518         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 519         if (group_sid)
 520                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 521
 522         /*
 523          * Finally add the "standard" SIDs.
 524          * The only difference between guest and "anonymous" (which we
 525          * don't really support) is the addition of Authenticated_Users.
 526          */
 527
 528         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 529         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 530
 531         if (is_guest)
 532                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 533         else
 534                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 535
 536         sid_ndx = 5; /* next available spot */
 537
 538         for (i = 0; i < n_groupSIDs; i++) {
 539                 int check_sid_idx;
 540                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 541                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 542                                       &groupSIDs[i])) {
 543                                 break;
 544                         }
 545                 }
 546
 547                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 548                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 549                 } else {
 550                         ptoken->num_sids--;
 551                 }
 552         }
 553
 554         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 555
 556         *token = ptoken;
 557
 558         return nt_status;
 559 }
 560
 561 /****************************************************************************
 562  Create the SID list for this user.
 563 ****************************************************************************/
 564
 565 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 566 {
 567         DOM_SID user_sid;
 568         DOM_SID group_sid;
 569         DOM_SID *group_sids;
 570         NT_USER_TOKEN *token;
 571         int i;
 572
 573         if (!uid_to_sid(&user_sid, uid)) {
 574                 return NULL;
 575         }
 576         if (!gid_to_sid(&group_sid, gid)) {
 577                 return NULL;
 578         }
 579
 580         group_sids   = malloc(sizeof(DOM_SID) * ngroups);
 581         if (!group_sids) {
 582                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 583                 return NULL;
 584         }
 585
 586         for (i = 0; i < ngroups; i++) {
 587                 if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
 588                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 589                         SAFE_FREE(group_sids);
 590                         return NULL;
 591                 }
 592         }
 593
 594         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 595                                                   ngroups, group_sids, is_guest, &token))) {
 596                 SAFE_FREE(group_sids);
 597                 return NULL;
 598         }
 599
 600         SAFE_FREE(group_sids);
 601
 602         return token;
 603 }
 604
 605 /******************************************************************************
 606  * this function returns the groups (SIDs) of the local SAM the user is in.
 607  * If this samba server is a DC of the domain the user belongs to, it returns
 608  * both domain groups and local / builtin groups. If the user is in a trusted
 609  * domain, or samba is a member server of a domain, then this function returns
 610  * local and builtin groups the user is a member of.
 611  *
 612  * currently this is a hack, as there is no sam implementation that is capable
 613  * of groups.
 614  ******************************************************************************/
 615
 616 static NTSTATUS get_user_groups_from_local_sam(const DOM_SID *user_sid,
 617                                                int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 618 {
 619         uid_t             uid;
 620         enum SID_NAME_USE snu;
 621         fstring           str;
 622         int               n_unix_groups;
 623         int               i;
 624         struct passwd    *usr;
 625
 626         *n_groups = 0;
 627         *groups   = NULL;
 628
 629         if (!sid_to_uid(user_sid,  &uid, &snu)) {
 630                 DEBUG(2, ("get_user_groups_from_local_sam: Failed to convert user SID %s to a uid!\n",
 631                           sid_to_string(str, user_sid)));
 632                 /* This might be a non-unix account */
 633                 return NT_STATUS_OK;
 634         }
 635
 636         usr = getpwuid_alloc(uid);
 637
 638         n_unix_groups = groups_max();
 639         if ((*unix_groups = malloc( sizeof(gid_t) * groups_max() ) ) == NULL) {
 640                 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
 641                 passwd_free(&usr);
 642                 return NT_STATUS_NO_MEMORY;
 643         }
 644
 645         if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
 646                 *unix_groups = Realloc(unix_groups, sizeof(gid_t) * n_unix_groups);
 647                 if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
 648                         DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
 649                         SAFE_FREE(unix_groups);
 650                         passwd_free(&usr);
 651                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 652                 }
 653         }
 654
 655         passwd_free(&usr);
 656
 657         DEBUG(5,("get_user_groups_from_local_sam: user is in the unix following groups\n"));
 658         for (i = 0; i < n_unix_groups; i++)
 659                 DEBUGADD(5,("supplementary group gid:%ld\n",(long int)(*unix_groups)[i]));
 660
 661         if (n_unix_groups > 0) {
 662                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 663                 if (!*groups) {
 664                         DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
 665                         SAFE_FREE(unix_groups);
 666                         return NT_STATUS_NO_MEMORY;
 667                 }
 668         }
 669
 670         *n_groups = n_unix_groups;
 671
 672         for (i = 0; i < *n_groups; i++) {
 673                 if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
 674                         DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)unix_groups[i+1]));
 675                         SAFE_FREE(groups);
 676                         SAFE_FREE(unix_groups);
 677                         return NT_STATUS_NO_SUCH_USER;
 678                 }
 679         }
 680
 681         return NT_STATUS_OK;
 682 }
 683
 684 /***************************************************************************
 685  Make a user_info struct
 686 ***************************************************************************/
 687
 688 static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
 689 {
 690         *server_info = malloc(sizeof(**server_info));
 691         if (!*server_info) {
 692                 DEBUG(0,("make_server_info: malloc failed!\n"));
 693                 return NT_STATUS_NO_MEMORY;
 694         }
 695         ZERO_STRUCTP(*server_info);
 696
 697         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 698         (*server_info)->sam_account    = sampass;
 699
 700         return NT_STATUS_OK;
 701 }
 702
 703 /***************************************************************************
 704  Make (and fill) a user_info struct from a SAM_ACCOUNT
 705 ***************************************************************************/
 706
 707 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 708                               SAM_ACCOUNT *sampass)
 709 {
 710         NTSTATUS nt_status = NT_STATUS_OK;
 711         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 712         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 713         int       n_groupSIDs = 0;
 714         DOM_SID  *groupSIDs   = NULL;
 715         gid_t    *unix_groups = NULL;
 716         NT_USER_TOKEN *token;
 717         BOOL is_guest;
 718         uint32 rid;
 719
 720         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
 721                 return nt_status;
 722         }
 723
 724         if (!NT_STATUS_IS_OK(nt_status
 725                              = get_user_groups_from_local_sam(pdb_get_user_sid(sampass),
 726                 &n_groupSIDs, &groupSIDs, &unix_groups)))
 727         {
 728                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 729                 free_server_info(server_info);
 730                 return nt_status;
 731         }
 732
 733         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 734
 735         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 736                                                               n_groupSIDs, groupSIDs, is_guest,
 737                                                               &token)))
 738         {
 739                 DEBUG(4,("create_nt_user_token failed\n"));
 740                 SAFE_FREE(groupSIDs);
 741                 SAFE_FREE(unix_groups);
 742                 free_server_info(server_info);
 743                 return nt_status;
 744         }
 745
 746         SAFE_FREE(groupSIDs);
 747
 748         (*server_info)->n_groups = n_groupSIDs;
 749         (*server_info)->groups = unix_groups;
 750
 751         (*server_info)->ptok = token;
 752
 753         debug_nt_user_token(DBGC_AUTH, 5, token);
 754
 755         DEBUG(5,("make_server_info_sam: made server info for user %s\n",
 756                  pdb_get_username((*server_info)->sam_account)));
 757
 758         return nt_status;
 759 }
 760
 761 /***************************************************************************
 762  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 763  to a SAM_ACCOUNT
 764 ***************************************************************************/
 765
 766 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 767 {
 768         NTSTATUS nt_status;
 769         SAM_ACCOUNT *sampass = NULL;
 770         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 771                 return nt_status;
 772         }
 773         return make_server_info_sam(server_info, sampass);
 774 }
 775
 776 /***************************************************************************
 777  Make (and fill) a user_info struct for a guest login.
 778 ***************************************************************************/
 779
 780 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 781 {
 782         NTSTATUS nt_status;
 783         SAM_ACCOUNT *sampass = NULL;
 784         DOM_SID guest_sid;
 785
 786         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 787                 return nt_status;
 788         }
 789
 790         sid_copy(&guest_sid, get_global_sam_sid());
 791         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 792
 793         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 794                 return NT_STATUS_NO_SUCH_USER;
 795         }
 796
 797         nt_status = make_server_info_sam(server_info, sampass);
 798
 799         (*server_info)->guest = True;
 800
 801         return nt_status;
 802 }
 803
 804 /***************************************************************************
 805  Make a server_info struct from the info3 returned by a domain logon
 806 ***************************************************************************/
 807
 808 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 809                                 const char *internal_username,
 810                                 const char *sent_nt_username,
 811                                 const char *domain,
 812                                 auth_serversupplied_info **server_info,
 813                                 NET_USER_INFO_3 *info3)
 814 {
 815         NTSTATUS nt_status = NT_STATUS_OK;
 816
 817         const char *nt_domain;
 818         const char *nt_username;
 819
 820         SAM_ACCOUNT *sam_account = NULL;
 821         DOM_SID user_sid;
 822         DOM_SID group_sid;
 823
 824         struct passwd *passwd;
 825
 826         uid_t uid;
 827         gid_t gid;
 828
 829         int n_lgroupSIDs;
 830         DOM_SID *lgroupSIDs   = NULL;
 831
 832         gid_t *unix_groups = NULL;
 833         NT_USER_TOKEN *token;
 834
 835         DOM_SID *all_group_SIDs;
 836         int i;
 837
 838         /*
 839            Here is where we should check the list of
 840            trusted domains, and verify that the SID
 841            matches.
 842         */
 843
 844         sid_copy(&user_sid, &info3->dom_sid.sid);
 845         if (!sid_append_rid(&user_sid, info3->user_rid)) {
 846                 return NT_STATUS_INVALID_PARAMETER;
 847         }
 848
 849         sid_copy(&group_sid, &info3->dom_sid.sid);
 850         if (!sid_append_rid(&group_sid, info3->group_rid)) {
 851                 return NT_STATUS_INVALID_PARAMETER;
 852         }
 853
 854         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
 855                 /* If the server didn't give us one, just use the one we sent them */
 856                 nt_username = sent_nt_username;
 857         }
 858
 859         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
 860                 /* If the server didn't give us one, just use the one we sent them */
 861                 domain = domain;
 862         }
 863
 864         if (winbind_sid_to_uid(&uid, &user_sid)
 865             && winbind_sid_to_gid(&gid, &group_sid)
 866             && ((passwd = getpwuid_alloc(uid)))) {
 867                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 868                 passwd_free(&passwd);
 869         } else {
 870                 char *dom_user;
 871                 dom_user = talloc_asprintf(mem_ctx, "%s%s%s",
 872                                            nt_domain,
 873                                            lp_winbind_separator(),
 874                                            internal_username);
 875
 876                 if (!dom_user) {
 877                         DEBUG(0, ("talloc_asprintf failed!\n"));
 878                         return NT_STATUS_NO_MEMORY;
 879                 } else {
 880
 881                         if (!(passwd = Get_Pwnam(dom_user))
 882                                 /* Only lookup local for the local
 883                                    domain, we don't want this for
 884                                    trusted domains */
 885                             && strequal(nt_domain, lp_workgroup())) {
 886                                 passwd = Get_Pwnam(internal_username);
 887                         }
 888
 889                         if (!passwd) {
 890                                 return NT_STATUS_NO_SUCH_USER;
 891                         } else {
 892                                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 893                         }
 894                 }
 895         }
 896
 897         if (!NT_STATUS_IS_OK(nt_status)) {
 898                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
 899                 return nt_status;
 900         }
 901
 902         if (!pdb_set_user_sid(sam_account, &user_sid)) {
 903                 pdb_free_sam(&sam_account);
 904                 return NT_STATUS_UNSUCCESSFUL;
 905         }
 906
 907         if (!pdb_set_group_sid(sam_account, &group_sid)) {
 908                 pdb_free_sam(&sam_account);
 909                 return NT_STATUS_UNSUCCESSFUL;
 910         }
 911
 912         if (!pdb_set_nt_username(sam_account, nt_username)) {
 913                 pdb_free_sam(&sam_account);
 914                 return NT_STATUS_NO_MEMORY;
 915         }
 916
 917         if (!pdb_set_domain(sam_account, nt_domain)) {
 918                 pdb_free_sam(&sam_account);
 919                 return NT_STATUS_NO_MEMORY;
 920         }
 921
 922         if (!pdb_set_fullname(sam_account, pdb_unistr2_convert(&(info3->uni_full_name)))) {
 923                 pdb_free_sam(&sam_account);
 924                 return NT_STATUS_NO_MEMORY;
 925         }
 926
 927         if (!pdb_set_logon_script(sam_account, pdb_unistr2_convert(&(info3->uni_logon_script)), True)) {
 928                 pdb_free_sam(&sam_account);
 929                 return NT_STATUS_NO_MEMORY;
 930         }
 931
 932         if (!pdb_set_profile_path(sam_account, pdb_unistr2_convert(&(info3->uni_profile_path)), True)) {
 933                 pdb_free_sam(&sam_account);
 934                 return NT_STATUS_NO_MEMORY;
 935         }
 936
 937         if (!pdb_set_homedir(sam_account, pdb_unistr2_convert(&(info3->uni_home_dir)), True)) {
 938                 pdb_free_sam(&sam_account);
 939                 return NT_STATUS_NO_MEMORY;
 940         }
 941
 942         if (!pdb_set_dir_drive(sam_account, pdb_unistr2_convert(&(info3->uni_dir_drive)), True)) {
 943                 pdb_free_sam(&sam_account);
 944                 return NT_STATUS_NO_MEMORY;
 945         }
 946
 947         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
 948                 DEBUG(4, ("make_server_info failed!\n"));
 949                 pdb_free_sam(&sam_account);
 950                 return nt_status;
 951         }
 952
 953         /* Store the user group information in the server_info
 954            returned to the caller. */
 955
 956         if (!NT_STATUS_IS_OK(nt_status
 957                              = get_user_groups_from_local_sam(&user_sid,
 958                                                               &n_lgroupSIDs,
 959                                                               &lgroupSIDs,
 960                                                               &unix_groups)))
 961         {
 962                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 963                 return nt_status;
 964         }
 965
 966         (*server_info)->groups = unix_groups;
 967         (*server_info)->n_groups = n_lgroupSIDs;
 968
 969         /* Create a 'combined' list of all SIDs we might want in the SD */
 970         all_group_SIDs   = malloc(sizeof(DOM_SID) * (n_lgroupSIDs+info3->num_groups2));
 971         if (!all_group_SIDs) {
 972                 DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
 973                 SAFE_FREE(lgroupSIDs);
 974                 return NT_STATUS_NO_MEMORY;
 975         }
 976
 977         /* Copy the 'local' sids */
 978         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
 979         SAFE_FREE(lgroupSIDs);
 980
 981         /* and create (by appending rids) the 'domain' sids */
 982         for (i = 0; i < info3->num_groups2; i++) {
 983                 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
 984                 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
 985                         nt_status = NT_STATUS_INVALID_PARAMETER;
 986                         DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
 987                                 info3->gids[i].g_rid));
 988                         SAFE_FREE(lgroupSIDs);
 989                         return nt_status;
 990                 }
 991         }
 992
 993         /* Where are the 'global' sids... */
 994
 995         /* can the user be guest? if yes, where is it stored? */
 996         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(&user_sid, &group_sid,
 997                                                              n_lgroupSIDs+info3->num_groups2, all_group_SIDs,
 998                                                               False, &token))) {
 999                 DEBUG(4,("create_nt_user_token failed\n"));
1000                 SAFE_FREE(all_group_SIDs);
1001                 return nt_status;
1002         }
1003
1004         (*server_info)->ptok = token;
1005
1006         SAFE_FREE(all_group_SIDs);
1007
1008         debug_nt_user_token(DBGC_AUTH, 5, token);
1009
1010         return NT_STATUS_OK;
1011 }
1012
1013 /***************************************************************************
1014  Free a user_info struct
1015 ***************************************************************************/
1016
1017 void free_user_info(auth_usersupplied_info **user_info)
1018 {
1019         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1020         if (*user_info != NULL) {
1021                 if ((*user_info)->smb_name.str) {
1022                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1023                 }
1024                 SAFE_FREE((*user_info)->smb_name.str);
1025                 SAFE_FREE((*user_info)->internal_username.str);
1026                 SAFE_FREE((*user_info)->client_domain.str);
1027                 SAFE_FREE((*user_info)->domain.str);
1028                 SAFE_FREE((*user_info)->wksta_name.str);
1029                 data_blob_free(&(*user_info)->lm_resp);
1030                 data_blob_free(&(*user_info)->nt_resp);
1031                 SAFE_FREE((*user_info)->interactive_password);
1032                 data_blob_clear_free(&(*user_info)->plaintext_password);
1033                 ZERO_STRUCT(**user_info);
1034         }
1035         SAFE_FREE(*user_info);
1036 }
1037
1038 /***************************************************************************
1039  Clear out a server_info struct that has been allocated
1040 ***************************************************************************/
1041
1042 void free_server_info(auth_serversupplied_info **server_info)
1043 {
1044         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1045         if (*server_info != NULL) {
1046                 pdb_free_sam(&(*server_info)->sam_account);
1047
1048                 /* call pam_end here, unless we know we are keeping it */
1049                 delete_nt_token( &(*server_info)->ptok );
1050                 SAFE_FREE((*server_info)->groups);
1051                 ZERO_STRUCT(**server_info);
1052         }
1053         SAFE_FREE(*server_info);
1054 }
1055
1056 /***************************************************************************
1057  Make an auth_methods struct
1058 ***************************************************************************/
1059
1060 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1061 {
1062         if (!auth_context) {
1063                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1064         }
1065
1066         if (!auth_method) {
1067                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1068         }
1069
1070         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1071         if (!*auth_method) {
1072                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1073                 return False;
1074         }
1075         ZERO_STRUCTP(*auth_method);
1076
1077         return True;
1078 }
1079
1080 /****************************************************************************
1081  Delete a SID token.
1082 ****************************************************************************/
1083
1084 void delete_nt_token(NT_USER_TOKEN **pptoken)
1085 {
1086     if (*pptoken) {
1087             NT_USER_TOKEN *ptoken = *pptoken;
1088             SAFE_FREE( ptoken->user_sids );
1089             ZERO_STRUCTP(ptoken);
1090     }
1091     SAFE_FREE(*pptoken);
1092 }
1093
1094 /****************************************************************************
1095  Duplicate a SID token.
1096 ****************************************************************************/
1097
1098 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1099 {
1100         NT_USER_TOKEN *token;
1101
1102         if (!ptoken)
1103                 return NULL;
1104
1105     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1106         return NULL;
1107
1108     ZERO_STRUCTP(token);
1109
1110     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1111         SAFE_FREE(token);
1112         return NULL;
1113     }
1114
1115     token->num_sids = ptoken->num_sids;
1116
1117         return token;
1118 }
1119
1120 /**
1121  * Squash an NT_STATUS in line with security requirements.
1122  * In an attempt to avoid giving the whole game away when users
1123  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1124  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1125  * (session setups in particular).
1126  *
1127  * @param nt_status NTSTATUS input for squashing.
1128  * @return the 'squashed' nt_status
1129  **/
1130
1131 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1132 {
1133         if NT_STATUS_IS_OK(nt_status) {
1134                 return nt_status;
1135         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1136                 /* Match WinXP and don't give the game away */
1137                 return NT_STATUS_LOGON_FAILURE;
1138
1139         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1140                 /* Match WinXP and don't give the game away */
1141                 return NT_STATUS_LOGON_FAILURE;
1142         } else {
1143                 return nt_status;
1144         }
1145 }
1146
1147
1148