source/passdb/passdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Jeremy Allison                 1996-2001
   5    Copyright (C) Luke Kenneth Casson Leighton   1996-1998
   6    Copyright (C) Gerald (Jerry) Carter          2000-2001
   7    Copyright (C) Andrew Bartlett                2001-2002
   8    Copyright (C) Simo Sorce                     2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_PASSDB
  29
  30 /******************************************************************
  31  get the default domain/netbios name to be used when
  32  testing authentication.  For example, if you connect
  33  to a Windows member server using a bogus domain name, the
  34  Windows box will map the BOGUS\user to DOMAIN\user.  A
  35  standalone box will map to WKS\user.
  36 ******************************************************************/
  37
  38 const char *get_default_sam_name(void)
  39 {
  40         /* standalone servers can only use the local netbios name */
  41         if ( lp_server_role() == ROLE_STANDALONE )
  42                 return global_myname();
  43
  44         /* Windows domain members default to the DOMAIN
  45            name when not specified */
  46         return lp_workgroup();
  47 }
  48
  49 /******************************************************************
  50  get the default domain/netbios name to be used when dealing
  51  with our passdb list of accounts
  52 ******************************************************************/
  53
  54 const char *get_global_sam_name(void)
  55 {
  56         if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
  57                 return lp_workgroup();
  58         }
  59         return global_myname();
  60 }
  61
  62 /************************************************************
  63  Fill the SAM_ACCOUNT with default values.
  64  ***********************************************************/
  65
  66 void pdb_fill_default_sam(SAM_ACCOUNT *user)
  67 {
  68         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  69
  70         /* no initial methods */
  71         user->methods = NULL;
  72
  73         /* Don't change these timestamp settings without a good reason.
  74            They are important for NT member server compatibility. */
  75
  76         user->private.logon_time            = (time_t)0;
  77         user->private.pass_last_set_time    = (time_t)0;
  78         user->private.pass_can_change_time  = (time_t)0;
  79         user->private.logoff_time           =
  80         user->private.kickoff_time          =
  81         user->private.pass_must_change_time = get_time_t_max();
  82         user->private.fields_present        = 0x00ffffff;
  83         user->private.logon_divs = 168;         /* hours per week */
  84         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  85         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  86         user->private.bad_password_count = 0;
  87         user->private.logon_count = 0;
  88         user->private.unknown_6 = 0x000004ec; /* don't know */
  89
  90         /* Some parts of samba strlen their pdb_get...() returns,
  91            so this keeps the interface unchanged for now. */
  92
  93         user->private.username = "";
  94         user->private.domain = "";
  95         user->private.nt_username = "";
  96         user->private.full_name = "";
  97         user->private.home_dir = "";
  98         user->private.logon_script = "";
  99         user->private.profile_path = "";
 100         user->private.acct_desc = "";
 101         user->private.workstations = "";
 102         user->private.unknown_str = "";
 103         user->private.munged_dial = "";
 104
 105         user->private.plaintext_pw = NULL;
 106
 107         /*
 108            Unless we know otherwise have a Account Control Bit
 109            value of 'normal user'.  This helps User Manager, which
 110            asks for a filtered list of users.
 111         */
 112
 113         user->private.acct_ctrl = ACB_NORMAL;
 114 }
 115
 116 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
 117 {
 118         if (*user) {
 119                 data_blob_clear_free(&((*user)->private.lm_pw));
 120                 data_blob_clear_free(&((*user)->private.nt_pw));
 121
 122                 if((*user)->private.plaintext_pw!=NULL)
 123                         memset((*user)->private.plaintext_pw,'\0',strlen((*user)->private.plaintext_pw));
 124                 talloc_destroy((*user)->mem_ctx);
 125                 *user = NULL;
 126         }
 127 }
 128
 129
 130 /**********************************************************************
 131  Allocates memory and initialises a struct sam_passwd on supplied mem_ctx.
 132 ***********************************************************************/
 133
 134 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
 135 {
 136         if (*user != NULL) {
 137                 DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n"));
 138 #if 0
 139                 smb_panic("non-NULL pointer passed to pdb_init_sam\n");
 140 #endif
 141                 return NT_STATUS_UNSUCCESSFUL;
 142         }
 143
 144         if (!mem_ctx) {
 145                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 146                 return NT_STATUS_UNSUCCESSFUL;
 147         }
 148
 149         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 150
 151         if (*user==NULL) {
 152                 DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n"));
 153                 return NT_STATUS_NO_MEMORY;
 154         }
 155
 156         (*user)->mem_ctx = mem_ctx;
 157
 158         (*user)->free_fn = NULL;
 159
 160         pdb_fill_default_sam(*user);
 161
 162         return NT_STATUS_OK;
 163 }
 164
 165
 166 /*************************************************************
 167  Allocates memory and initialises a struct sam_passwd.
 168  ************************************************************/
 169
 170 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 171 {
 172         TALLOC_CTX *mem_ctx;
 173         NTSTATUS nt_status;
 174
 175         mem_ctx = talloc_init("passdb internal SAM_ACCOUNT allocation");
 176
 177         if (!mem_ctx) {
 178                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 179                 return NT_STATUS_NO_MEMORY;
 180         }
 181
 182         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 183                 talloc_destroy(mem_ctx);
 184                 return nt_status;
 185         }
 186
 187         (*user)->free_fn = destroy_pdb_talloc;
 188
 189         return NT_STATUS_OK;
 190 }
 191
 192 /**************************************************************************
 193  * This function will take care of all the steps needed to correctly
 194  * allocate and set the user SID, please do use this function to create new
 195  * users, messing with SIDs is not good.
 196  *
 197  * account_data must be provided initialized, pwd may be null.
 198  *                                                                      SSS
 199  ***************************************************************************/
 200
 201 static NTSTATUS pdb_set_sam_sids(SAM_ACCOUNT *account_data, const struct passwd *pwd)
 202 {
 203         const char *guest_account = lp_guestaccount();
 204         GROUP_MAP map;
 205         BOOL ret;
 206
 207         if (!account_data || !pwd) {
 208                 return NT_STATUS_INVALID_PARAMETER;
 209         }
 210
 211         /* this is a hack this thing should not be set
 212            this way --SSS */
 213         if (!(guest_account && *guest_account)) {
 214                 DEBUG(1, ("NULL guest account!?!?\n"));
 215                 return NT_STATUS_UNSUCCESSFUL;
 216         } else {
 217                 /* Ensure this *must* be set right */
 218                 if (strcmp(pwd->pw_name, guest_account) == 0) {
 219                         if (!pdb_set_user_sid_from_rid(account_data, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) {
 220                                 return NT_STATUS_UNSUCCESSFUL;
 221                         }
 222                         if (!pdb_set_group_sid_from_rid(account_data, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) {
 223                                 return NT_STATUS_UNSUCCESSFUL;
 224                         }
 225                         return NT_STATUS_OK;
 226                 }
 227         }
 228
 229         if (!pdb_set_user_sid_from_rid(account_data, fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 230                 DEBUG(0,("Can't set User SID from RID!\n"));
 231                 return NT_STATUS_INVALID_PARAMETER;
 232         }
 233
 234         /* call the mapping code here */
 235         become_root();
 236         ret = pdb_getgrgid(&map, pwd->pw_gid);
 237         unbecome_root();
 238
 239         if( ret ) {
 240                 if (!pdb_set_group_sid(account_data, &map.sid, PDB_SET)){
 241                         DEBUG(0,("Can't set Group SID!\n"));
 242                         return NT_STATUS_INVALID_PARAMETER;
 243                 }
 244         }
 245         else {
 246                 if (!pdb_set_group_sid_from_rid(account_data, pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 247                         DEBUG(0,("Can't set Group SID\n"));
 248                         return NT_STATUS_INVALID_PARAMETER;
 249                 }
 250         }
 251
 252         return NT_STATUS_OK;
 253 }
 254
 255 /*************************************************************
 256  Initialises a struct sam_passwd with sane values.
 257  ************************************************************/
 258
 259 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 260 {
 261         NTSTATUS ret;
 262
 263         if (!pwd) {
 264                 return NT_STATUS_UNSUCCESSFUL;
 265         }
 266
 267         pdb_fill_default_sam(sam_account);
 268
 269         pdb_set_username(sam_account, pwd->pw_name, PDB_SET);
 270         pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET);
 271
 272         pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET);
 273
 274         pdb_set_domain (sam_account, get_global_sam_name(), PDB_DEFAULT);
 275
 276         /* When we get a proper uid -> SID and SID -> uid allocation
 277            mechinism, we should call it here.
 278
 279            We can't just set this to 0 or allow it only to be filled
 280            in when added to the backend, because the user's SID
 281            may already be in security descriptors etc.
 282
 283            -- abartlet 11-May-02
 284         */
 285
 286         ret = pdb_set_sam_sids(sam_account, pwd);
 287         if (!NT_STATUS_IS_OK(ret)) return ret;
 288
 289         /* check if this is a user account or a machine account */
 290         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 291         {
 292                 pdb_set_profile_path(sam_account,
 293                                      talloc_sub_specified((sam_account)->mem_ctx,
 294                                                             lp_logon_path(),
 295                                                             pwd->pw_name, global_myname(),
 296                                                             pwd->pw_uid, pwd->pw_gid),
 297                                      PDB_DEFAULT);
 298
 299                 pdb_set_homedir(sam_account,
 300                                 talloc_sub_specified((sam_account)->mem_ctx,
 301                                                        lp_logon_home(),
 302                                                        pwd->pw_name, global_myname(),
 303                                                        pwd->pw_uid, pwd->pw_gid),
 304                                 PDB_DEFAULT);
 305
 306                 pdb_set_dir_drive(sam_account,
 307                                   talloc_sub_specified((sam_account)->mem_ctx,
 308                                                          lp_logon_drive(),
 309                                                          pwd->pw_name, global_myname(),
 310                                                          pwd->pw_uid, pwd->pw_gid),
 311                                   PDB_DEFAULT);
 312
 313                 pdb_set_logon_script(sam_account,
 314                                      talloc_sub_specified((sam_account)->mem_ctx,
 315                                                             lp_logon_script(),
 316                                                             pwd->pw_name, global_myname(),
 317                                                             pwd->pw_uid, pwd->pw_gid),
 318                                      PDB_DEFAULT);
 319                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) {
 320                         DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name));
 321                         return NT_STATUS_UNSUCCESSFUL;
 322                 }
 323         } else {
 324                 if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) {
 325                         DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name));
 326                         return NT_STATUS_UNSUCCESSFUL;
 327                 }
 328         }
 329         return NT_STATUS_OK;
 330 }
 331
 332
 333 /*************************************************************
 334  Initialises a struct sam_passwd with sane values.
 335  ************************************************************/
 336
 337 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 338 {
 339         NTSTATUS nt_status;
 340
 341         if (!pwd) {
 342                 new_sam_acct = NULL;
 343                 return NT_STATUS_INVALID_PARAMETER;
 344         }
 345
 346         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 347                 new_sam_acct = NULL;
 348                 return nt_status;
 349         }
 350
 351         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 352                 pdb_free_sam(new_sam_acct);
 353                 new_sam_acct = NULL;
 354                 return nt_status;
 355         }
 356
 357         return NT_STATUS_OK;
 358 }
 359
 360
 361 /*************************************************************
 362  Initialises a SAM_ACCOUNT ready to add a new account, based
 363  on the UNIX user.  Pass in a RID if you have one
 364  ************************************************************/
 365
 366 NTSTATUS pdb_init_sam_new(SAM_ACCOUNT **new_sam_acct, const char *username,
 367                           uint32 rid)
 368 {
 369         NTSTATUS        nt_status = NT_STATUS_NO_MEMORY;
 370         struct passwd   *pwd;
 371         BOOL            ret;
 372
 373         pwd = Get_Pwnam(username);
 374
 375         if (!pwd)
 376                 return NT_STATUS_NO_SUCH_USER;
 377
 378         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(new_sam_acct, pwd))) {
 379                 *new_sam_acct = NULL;
 380                 return nt_status;
 381         }
 382
 383         /* see if we need to generate a new rid using the 2.2 algorithm */
 384         if ( rid == 0 && lp_enable_rid_algorithm() ) {
 385                 DEBUG(10,("pdb_init_sam_new: no RID specified.  Generating one via old algorithm\n"));
 386                 rid = fallback_pdb_uid_to_user_rid(pwd->pw_uid);
 387         }
 388
 389         /* set the new SID */
 390
 391         ret = pdb_set_user_sid_from_rid( *new_sam_acct, rid, PDB_SET );
 392
 393         return (ret ? NT_STATUS_OK : NT_STATUS_NO_SUCH_USER);
 394 }
 395
 396
 397 /**
 398  * Free the contets of the SAM_ACCOUNT, but not the structure.
 399  *
 400  * Also wipes the LM and NT hashes and plaintext password from
 401  * memory.
 402  *
 403  * @param user SAM_ACCOUNT to free members of.
 404  **/
 405
 406 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 407 {
 408
 409         /* Kill off sensitive data.  Free()ed by the
 410            talloc mechinism */
 411
 412         data_blob_clear_free(&(user->private.lm_pw));
 413         data_blob_clear_free(&(user->private.nt_pw));
 414         if (user->private.plaintext_pw!=NULL)
 415                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 416
 417         if (user->private.backend_private_data && user->private.backend_private_data_free_fn) {
 418                 user->private.backend_private_data_free_fn(&user->private.backend_private_data);
 419         }
 420 }
 421
 422
 423 /************************************************************
 424  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 425  ***********************************************************/
 426
 427 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 428 {
 429         if (user == NULL) {
 430                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 431 #if 0
 432                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 433 #endif
 434                 return NT_STATUS_UNSUCCESSFUL;
 435         }
 436
 437         pdb_free_sam_contents(user);
 438
 439         pdb_fill_default_sam(user);
 440
 441         return NT_STATUS_OK;
 442 }
 443
 444
 445 /************************************************************
 446  Free the SAM_ACCOUNT and the member pointers.
 447  ***********************************************************/
 448
 449 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 450 {
 451         if (*user == NULL) {
 452                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 453 #if 0
 454                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 455 #endif
 456                 return NT_STATUS_UNSUCCESSFUL;
 457         }
 458
 459         pdb_free_sam_contents(*user);
 460
 461         if ((*user)->free_fn) {
 462                 (*user)->free_fn(user);
 463         }
 464
 465         return NT_STATUS_OK;
 466 }
 467
 468 /**********************************************************
 469  Encode the account control bits into a string.
 470  length = length of string to encode into (including terminating
 471  null). length *MUST BE MORE THAN 2* !
 472  **********************************************************/
 473
 474 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 475 {
 476         static fstring acct_str;
 477
 478         size_t i = 0;
 479
 480         SMB_ASSERT(length <= sizeof(acct_str));
 481
 482         acct_str[i++] = '[';
 483
 484         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 485         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 486         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 487         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 488         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 489         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 490         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 491         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 492         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 493         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 494         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 495
 496         for ( ; i < length - 2 ; i++ )
 497                 acct_str[i] = ' ';
 498
 499         i = length - 2;
 500         acct_str[i++] = ']';
 501         acct_str[i++] = '\0';
 502
 503         return acct_str;
 504 }
 505
 506 /**********************************************************
 507  Decode the account control bits from a string.
 508  **********************************************************/
 509
 510 uint16 pdb_decode_acct_ctrl(const char *p)
 511 {
 512         uint16 acct_ctrl = 0;
 513         BOOL finished = False;
 514
 515         /*
 516          * Check if the account type bits have been encoded after the
 517          * NT password (in the form [NDHTUWSLXI]).
 518          */
 519
 520         if (*p != '[')
 521                 return 0;
 522
 523         for (p++; *p && !finished; p++) {
 524                 switch (*p) {
 525                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 526                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 527                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 528                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 529                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 530                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 531                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 532                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 533                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 534                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 535                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 536             case ' ': { break; }
 537                         case ':':
 538                         case '\n':
 539                         case '\0':
 540                         case ']':
 541                         default:  { finished = True; }
 542                 }
 543         }
 544
 545         return acct_ctrl;
 546 }
 547
 548 /*************************************************************
 549  Routine to set 32 hex password characters from a 16 byte array.
 550 **************************************************************/
 551
 552 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 553 {
 554         if (pwd != NULL) {
 555                 int i;
 556                 for (i = 0; i < 16; i++)
 557                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 558         } else {
 559                 if (acct_ctrl & ACB_PWNOTREQ)
 560                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 561                 else
 562                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 563         }
 564 }
 565
 566 /*************************************************************
 567  Routine to get the 32 hex characters and turn them
 568  into a 16 byte array.
 569 **************************************************************/
 570
 571 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 572 {
 573         int i;
 574         unsigned char   lonybble, hinybble;
 575         const char      *hexchars = "0123456789ABCDEF";
 576         char           *p1, *p2;
 577
 578         if (!p)
 579                 return (False);
 580
 581         for (i = 0; i < 32; i += 2) {
 582                 hinybble = toupper(p[i]);
 583                 lonybble = toupper(p[i + 1]);
 584
 585                 p1 = strchr(hexchars, hinybble);
 586                 p2 = strchr(hexchars, lonybble);
 587
 588                 if (!p1 || !p2)
 589                         return (False);
 590
 591                 hinybble = PTR_DIFF(p1, hexchars);
 592                 lonybble = PTR_DIFF(p2, hexchars);
 593
 594                 pwd[i / 2] = (hinybble << 4) | lonybble;
 595         }
 596         return (True);
 597 }
 598
 599 int algorithmic_rid_base(void)
 600 {
 601         static int rid_offset = 0;
 602
 603         if (rid_offset != 0)
 604                 return rid_offset;
 605
 606         rid_offset = lp_algorithmic_rid_base();
 607
 608         if (rid_offset < BASE_RID) {
 609                 /* Try to prevent admin foot-shooting, we can't put algorithmic
 610                    rids below 1000, that's the 'well known RIDs' on NT */
 611                 DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID));
 612                 rid_offset = BASE_RID;
 613         }
 614         if (rid_offset & 1) {
 615                 DEBUG(0, ("algorithmic rid base must be even\n"));
 616                 rid_offset += 1;
 617         }
 618         return rid_offset;
 619 }
 620
 621 /*******************************************************************
 622  Converts NT user RID to a UNIX uid.
 623  ********************************************************************/
 624
 625 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 626 {
 627         int rid_offset = algorithmic_rid_base();
 628         return (uid_t)(((user_rid & (~USER_RID_TYPE)) - rid_offset)/RID_MULTIPLIER);
 629 }
 630
 631 /*******************************************************************
 632  converts UNIX uid to an NT User RID.
 633  ********************************************************************/
 634
 635 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 636 {
 637         int rid_offset = algorithmic_rid_base();
 638         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 639 }
 640
 641 /*******************************************************************
 642  Converts NT group RID to a UNIX gid.
 643  ********************************************************************/
 644
 645 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 646 {
 647         int rid_offset = algorithmic_rid_base();
 648         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 649 }
 650
 651 /*******************************************************************
 652  converts NT Group RID to a UNIX uid.
 653
 654  warning: you must not call that function only
 655  you must do a call to the group mapping first.
 656  there is not anymore a direct link between the gid and the rid.
 657  ********************************************************************/
 658
 659 uint32 pdb_gid_to_group_rid(gid_t gid)
 660 {
 661         int rid_offset = algorithmic_rid_base();
 662         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 663 }
 664
 665 /*******************************************************************
 666  Decides if a RID is a well known RID.
 667  ********************************************************************/
 668
 669 static BOOL pdb_rid_is_well_known(uint32 rid)
 670 {
 671         /* Not using rid_offset here, because this is the actual
 672            NT fixed value (1000) */
 673
 674         return (rid < BASE_RID);
 675 }
 676
 677 /*******************************************************************
 678  Decides if a RID is a user or group RID.
 679  ********************************************************************/
 680
 681 BOOL fallback_pdb_rid_is_user(uint32 rid)
 682 {
 683   /* lkcl i understand that NT attaches an enumeration to a RID
 684    * such that it can be identified as either a user, group etc
 685    * type.  there are 5 such categories, and they are documented.
 686    */
 687         /* However, they are not in the RID, just somthing you can query
 688            seperatly.  Sorry luke :-) */
 689
 690    if(pdb_rid_is_well_known(rid)) {
 691       /*
 692        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 693        * and DOMAIN_USER_RID_GUEST.
 694        */
 695      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 696        return True;
 697    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 698      return True;
 699    }
 700    return False;
 701 }
 702
 703 /*******************************************************************
 704  Convert a rid into a name. Used in the lookup SID rpc.
 705  ********************************************************************/
 706
 707 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 708 {
 709         uint32 rid;
 710         SAM_ACCOUNT *sam_account = NULL;
 711         GROUP_MAP map;
 712         BOOL ret;
 713
 714         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 715                 DEBUG(0,("local_lookup_sid: sid_peek_check_rid return False! SID: %s\n",
 716                         sid_string_static(&map.sid)));
 717                 return False;
 718         }
 719         *psid_name_use = SID_NAME_UNKNOWN;
 720
 721         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 722
 723         if (rid == DOMAIN_USER_RID_ADMIN) {
 724                 const char **admin_list = lp_admin_users(-1);
 725                 *psid_name_use = SID_NAME_USER;
 726                 if (admin_list) {
 727                         const char *p = *admin_list;
 728                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 729                                 fstrcpy(name, "Administrator");
 730                 } else {
 731                         fstrcpy(name, "Administrator");
 732                 }
 733                 return True;
 734         }
 735
 736         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 737                 return False;
 738         }
 739
 740         /* see if the passdb can help us with the name of the user */
 741
 742         /* BEING ROOT BLLOCK */
 743         become_root();
 744         if (pdb_getsampwsid(sam_account, sid)) {
 745                 unbecome_root();                        /* -----> EXIT BECOME_ROOT() */
 746                 fstrcpy(name, pdb_get_username(sam_account));
 747                 *psid_name_use = SID_NAME_USER;
 748
 749                 pdb_free_sam(&sam_account);
 750
 751                 return True;
 752         }
 753         pdb_free_sam(&sam_account);
 754
 755         ret = pdb_getgrsid(&map, *sid);
 756         unbecome_root();
 757         /* END BECOME_ROOT BLOCK */
 758
 759         if ( ret ) {
 760                 if (map.gid!=(gid_t)-1) {
 761                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 762                 } else {
 763                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 764                 }
 765
 766                 fstrcpy(name, map.nt_name);
 767                 *psid_name_use = map.sid_name_use;
 768                 return True;
 769         }
 770
 771         if (fallback_pdb_rid_is_user(rid)) {
 772                 uid_t uid;
 773                 struct passwd *pw = NULL;
 774
 775                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 776
 777                 uid = fallback_pdb_user_rid_to_uid(rid);
 778                 pw = sys_getpwuid( uid );
 779
 780                 DEBUG(5,("local_lookup_sid: looking up uid %u %s\n", (unsigned int)uid,
 781                          pw ? "succeeded" : "failed" ));
 782
 783                 if ( !pw )
 784                         fstr_sprintf(name, "unix_user.%u", (unsigned int)uid);
 785                 else
 786                         fstrcpy( name, pw->pw_name );
 787
 788                 DEBUG(5,("local_lookup_sid: found user %s for rid %u\n", name,
 789                          (unsigned int)rid ));
 790
 791                 *psid_name_use = SID_NAME_USER;
 792
 793                 return ( pw != NULL );
 794         } else {
 795                 gid_t gid;
 796                 struct group *gr;
 797
 798                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 799
 800                 gid = pdb_group_rid_to_gid(rid);
 801                 gr = getgrgid(gid);
 802
 803                 *psid_name_use = SID_NAME_ALIAS;
 804
 805                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 806                          gr ? "succeeded" : "failed" ));
 807
 808                 if( !gr )
 809                         fstr_sprintf(name, "unix_group.%u", (unsigned int)gid);
 810                 else
 811                         fstrcpy( name, gr->gr_name);
 812
 813                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 814                          (unsigned int)rid ));
 815
 816                 /* assume fallback groups aer domain global groups */
 817
 818                 *psid_name_use = SID_NAME_DOM_GRP;
 819
 820                 return ( gr != NULL );
 821         }
 822 }
 823
 824 /*******************************************************************
 825  Convert a name into a SID. Used in the lookup name rpc.
 826  ********************************************************************/
 827
 828 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 829 {
 830         extern DOM_SID global_sid_World_Domain;
 831         DOM_SID local_sid;
 832         fstring user;
 833         SAM_ACCOUNT *sam_account = NULL;
 834         struct group *grp;
 835         GROUP_MAP map;
 836
 837         *psid_name_use = SID_NAME_UNKNOWN;
 838
 839         /*
 840          * user may be quoted a const string, and map_username and
 841          * friends can modify it. Make a modifiable copy. JRA.
 842          */
 843
 844         fstrcpy(user, c_user);
 845
 846         sid_copy(&local_sid, get_global_sam_sid());
 847
 848         /*
 849          * Special case for MACHINE\Everyone. Map to the world_sid.
 850          */
 851
 852         if(strequal(user, "Everyone")) {
 853                 sid_copy( psid, &global_sid_World_Domain);
 854                 sid_append_rid(psid, 0);
 855                 *psid_name_use = SID_NAME_ALIAS;
 856                 return True;
 857         }
 858
 859         (void)map_username(user);
 860
 861         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 862                 return False;
 863         }
 864
 865         /* BEGIN ROOT BLOCK */
 866
 867         become_root();
 868         if (pdb_getsampwnam(sam_account, user)) {
 869                 unbecome_root();
 870                 sid_copy(psid, pdb_get_user_sid(sam_account));
 871                 *psid_name_use = SID_NAME_USER;
 872
 873                 pdb_free_sam(&sam_account);
 874                 return True;
 875         }
 876
 877         pdb_free_sam(&sam_account);
 878
 879         /*
 880          * Maybe it was a group ?
 881          */
 882
 883         /* check if it's a mapped group */
 884         if (pdb_getgrnam(&map, user)) {
 885                 /* yes it's a mapped group */
 886                 sid_copy(&local_sid, &map.sid);
 887                 *psid_name_use = map.sid_name_use;
 888         } else {
 889                 /* it's not a mapped group */
 890                 grp = getgrnam(user);
 891                 if(!grp) {
 892                         unbecome_root();                /* ---> exit form block */
 893                         return False;
 894                 }
 895
 896                 /*
 897                  *check if it's mapped, if it is reply it doesn't exist
 898                  *
 899                  * that's to prevent this case:
 900                  *
 901                  * unix group ug is mapped to nt group ng
 902                  * someone does a lookup on ug
 903                  * we must not reply as it doesn't "exist" anymore
 904                  * for NT. For NT only ng exists.
 905                  * JFM, 30/11/2001
 906                  */
 907
 908                 if (pdb_getgrgid(&map, grp->gr_gid)){
 909                         unbecome_root();                /* ---> exit form block */
 910                         return False;
 911                 }
 912
 913                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 914                 *psid_name_use = SID_NAME_ALIAS;
 915         }
 916         unbecome_root();
 917         /* END ROOT BLOCK */
 918
 919         sid_copy( psid, &local_sid);
 920
 921         return True;
 922 }
 923
 924 /*************************************************************
 925  Change a password entry in the local smbpasswd file.
 926  *************************************************************/
 927
 928 BOOL local_password_change(const char *user_name, int local_flags,
 929                            const char *new_passwd,
 930                            char *err_str, size_t err_str_len,
 931                            char *msg_str, size_t msg_str_len)
 932 {
 933         SAM_ACCOUNT     *sam_pass=NULL;
 934         uint16 other_acb;
 935
 936         *err_str = '\0';
 937         *msg_str = '\0';
 938
 939         /* Get the smb passwd entry for this user */
 940         pdb_init_sam(&sam_pass);
 941
 942         become_root();
 943         if(!pdb_getsampwnam(sam_pass, user_name)) {
 944                 unbecome_root();
 945                 pdb_free_sam(&sam_pass);
 946
 947                 if ((local_flags & LOCAL_ADD_USER) || (local_flags & LOCAL_DELETE_USER)) {
 948                         /* Might not exist in /etc/passwd.  Use rid algorithm here */
 949                         if (!NT_STATUS_IS_OK(pdb_init_sam_new(&sam_pass, user_name, 0))) {
 950                                 slprintf(err_str, err_str_len-1, "Failed to initialise SAM_ACCOUNT for user %s.\n", user_name);
 951                                 return False;
 952                         }
 953                 } else {
 954                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
 955                         return False;
 956                 }
 957         } else {
 958                 unbecome_root();
 959                 /* the entry already existed */
 960                 local_flags &= ~LOCAL_ADD_USER;
 961         }
 962
 963         /* the 'other' acb bits not being changed here */
 964         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
 965         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 966                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
 967                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
 968                         pdb_free_sam(&sam_pass);
 969                         return False;
 970                 }
 971         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 972                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
 973                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
 974                         pdb_free_sam(&sam_pass);
 975                         return False;
 976                 }
 977         } else {
 978                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
 979                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
 980                         pdb_free_sam(&sam_pass);
 981                         return False;
 982                 }
 983         }
 984
 985         /*
 986          * We are root - just write the new password
 987          * and the valid last change time.
 988          */
 989
 990         if (local_flags & LOCAL_DISABLE_USER) {
 991                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
 992                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
 993                         pdb_free_sam(&sam_pass);
 994                         return False;
 995                 }
 996         } else if (local_flags & LOCAL_ENABLE_USER) {
 997                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 998                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 999                         pdb_free_sam(&sam_pass);
1000                         return False;
1001                 }
1002         }
1003
1004         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1005                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
1006                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1007                         pdb_free_sam(&sam_pass);
1008                         return False;
1009                 }
1010         } else if (local_flags & LOCAL_SET_PASSWORD) {
1011                 /*
1012                  * If we're dealing with setting a completely empty user account
1013                  * ie. One with a password of 'XXXX', but not set disabled (like
1014                  * an account created from scratch) then if the old password was
1015                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1016                  * We remove that as we're giving this user their first password
1017                  * and the decision hasn't really been made to disable them (ie.
1018                  * don't create them disabled). JRA.
1019                  */
1020                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1021                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1022                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1023                                 pdb_free_sam(&sam_pass);
1024                                 return False;
1025                         }
1026                 }
1027                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
1028                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1029                         pdb_free_sam(&sam_pass);
1030                         return False;
1031                 }
1032
1033                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1034                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1035                         pdb_free_sam(&sam_pass);
1036                         return False;
1037                 }
1038         }
1039
1040         if (local_flags & LOCAL_ADD_USER) {
1041                 if (pdb_add_sam_account(sam_pass)) {
1042                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1043                         pdb_free_sam(&sam_pass);
1044                         return True;
1045                 } else {
1046                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1047                         pdb_free_sam(&sam_pass);
1048                         return False;
1049                 }
1050         } else if (local_flags & LOCAL_DELETE_USER) {
1051                 if (!pdb_delete_sam_account(sam_pass)) {
1052                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1053                         pdb_free_sam(&sam_pass);
1054                         return False;
1055                 }
1056                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1057         } else {
1058                 if(!pdb_update_sam_account(sam_pass)) {
1059                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1060                         pdb_free_sam(&sam_pass);
1061                         return False;
1062                 }
1063                 if(local_flags & LOCAL_DISABLE_USER)
1064                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1065                 else if (local_flags & LOCAL_ENABLE_USER)
1066                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1067                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1068                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1069         }
1070
1071         pdb_free_sam(&sam_pass);
1072         return True;
1073 }
1074
1075 /****************************************************************************
1076  Convert a uid to SID - algorithmic.
1077 ****************************************************************************/
1078
1079 DOM_SID *algorithmic_uid_to_sid(DOM_SID *psid, uid_t uid)
1080 {
1081         if ( !lp_enable_rid_algorithm() )
1082                 return NULL;
1083
1084         DEBUG(8,("algorithmic_uid_to_sid: falling back to RID algorithm\n"));
1085         sid_copy( psid, get_global_sam_sid() );
1086         sid_append_rid( psid, fallback_pdb_uid_to_user_rid(uid) );
1087         DEBUG(10,("algorithmic_uid_to_sid:  uid (%d) -> SID %s.\n",
1088                 (unsigned int)uid, sid_string_static(psid) ));
1089
1090         return psid;
1091 }
1092
1093 /****************************************************************************
1094  Convert a uid to SID - locally.
1095 ****************************************************************************/
1096
1097 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
1098 {
1099         SAM_ACCOUNT *sampw = NULL;
1100         struct passwd *unix_pw;
1101         BOOL ret;
1102
1103         unix_pw = sys_getpwuid( uid );
1104
1105         if ( !unix_pw ) {
1106                 DEBUG(4,("local_uid_to_sid: host has no idea of uid %lu\n", (unsigned long)uid));
1107                 return algorithmic_uid_to_sid( psid, uid);
1108         }
1109
1110         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1111                 DEBUG(0,("local_uid_to_sid: failed to allocate SAM_ACCOUNT object\n"));
1112                 return NULL;
1113         }
1114
1115         become_root();
1116         ret = pdb_getsampwnam( sampw, unix_pw->pw_name );
1117         unbecome_root();
1118
1119         if ( ret )
1120                 sid_copy( psid, pdb_get_user_sid(sampw) );
1121         else {
1122                 DEBUG(4,("local_uid_to_sid: User %s [uid == %lu] has no samba account\n",
1123                         unix_pw->pw_name, (unsigned long)uid));
1124
1125                 return algorithmic_uid_to_sid( psid, uid);
1126         }
1127
1128         DEBUG(10,("local_uid_to_sid:  uid (%d) -> SID %s (%s).\n",
1129                 (unsigned int)uid, sid_string_static(psid), unix_pw->pw_name));
1130
1131         return psid;
1132 }
1133
1134 /****************************************************************************
1135  Convert a SID to uid - locally.
1136 ****************************************************************************/
1137
1138 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1139 {
1140         SAM_ACCOUNT *sampw = NULL;
1141         struct passwd *unix_pw;
1142         const char *user_name;
1143
1144         *name_type = SID_NAME_UNKNOWN;
1145
1146         /*
1147          * We can only convert to a uid if this is our local
1148          * Domain SID (ie. we are the controling authority).
1149          */
1150         if (!sid_check_is_in_our_domain(psid) ) {
1151                 DEBUG(5,("local_sid_to_uid: this SID (%s) is not from our domain\n", sid_string_static(psid)));
1152                 return False;
1153         }
1154
1155         /* lookup the user account */
1156
1157         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1158                 DEBUG(0,("local_sid_to_uid: Failed to allocate memory for SAM_ACCOUNT object\n"));
1159                 return False;
1160         }
1161
1162         become_root();
1163         if ( !pdb_getsampwsid(sampw, psid) ) {
1164                 unbecome_root();
1165                 DEBUG(8,("local_sid_to_uid: Could not find SID %s in passdb\n",
1166                         sid_string_static(psid)));
1167                 return False;
1168         }
1169         unbecome_root();
1170
1171         user_name = pdb_get_username(sampw);
1172
1173         unix_pw = sys_getpwnam( user_name );
1174
1175         if ( !unix_pw ) {
1176                 DEBUG(0,("local_sid_to_uid: %s found in passdb but getpwnam() return NULL!\n",
1177                         user_name));
1178                 pdb_free_sam( &sampw );
1179                 return False;
1180         }
1181
1182         *puid = unix_pw->pw_uid;
1183
1184         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_string_static(psid),
1185                 (unsigned int)*puid, user_name ));
1186
1187         *name_type = SID_NAME_USER;
1188
1189         return True;
1190 }
1191
1192 /****************************************************************************
1193  Convert a gid to SID - locally.
1194 ****************************************************************************/
1195
1196 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
1197 {
1198         GROUP_MAP group;
1199         BOOL ret;
1200
1201         /* we don't need to disable winbindd since the gid is stored in
1202            the GROUP_MAP object */
1203
1204         /* done as root since ldap backend requires root to open a connection */
1205
1206         become_root();
1207         ret = pdb_getgrgid( &group, gid );
1208         unbecome_root();
1209
1210         if ( !ret ) {
1211
1212                 /* fallback to rid mapping if enabled */
1213
1214                 if ( lp_enable_rid_algorithm() ) {
1215                         sid_copy(psid, get_global_sam_sid());
1216                         sid_append_rid(psid, pdb_gid_to_group_rid(gid));
1217
1218                         DEBUG(10,("local_gid_to_sid: Fall back to algorithmic mapping: %u -> %s\n",
1219                                 (unsigned int)gid, sid_string_static(psid)));
1220
1221                         return psid;
1222                 }
1223                 else
1224                         return NULL;
1225         }
1226
1227         sid_copy( psid, &group.sid );
1228
1229         DEBUG(10,("local_gid_to_sid:  gid (%d) -> SID %s.\n",
1230                 (unsigned int)gid, sid_string_static(psid)));
1231
1232         return psid;
1233 }
1234
1235 /****************************************************************************
1236  Convert a SID to gid - locally.
1237 ****************************************************************************/
1238
1239 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1240 {
1241         uint32 rid;
1242         GROUP_MAP group;
1243         BOOL ret;
1244
1245         *name_type = SID_NAME_UNKNOWN;
1246
1247         /* This call can enumerate group mappings for foreign sids as well.
1248            So don't check for a match against our domain SID */
1249
1250         /* we don't need to disable winbindd since the gid is stored in
1251            the GROUP_MAP object */
1252
1253         become_root();
1254         ret = pdb_getgrsid(&group, *psid);
1255         unbecome_root();
1256
1257         if ( !ret ) {
1258
1259                 /* fallback to rid mapping if enabled */
1260
1261                 if ( lp_enable_rid_algorithm() ) {
1262
1263                         if (!sid_check_is_in_our_domain(psid) ) {
1264                                 DEBUG(5,("local_sid_to_gid: RID algorithm only supported for our domain (%s is not)\n", sid_string_static(psid)));
1265                                 return False;
1266                         }
1267
1268                         if (!sid_peek_rid(psid, &rid)) {
1269                                 DEBUG(10,("local_sid_to_uid: invalid SID!\n"));
1270                                         return False;
1271                         }
1272
1273                         DEBUG(10,("local_sid_to_gid: Fall back to algorithmic mapping\n"));
1274
1275                         if (fallback_pdb_rid_is_user(rid)) {
1276                                 DEBUG(3, ("local_sid_to_gid: SID %s is *NOT* a group\n", sid_string_static(psid)));
1277                                 return False;
1278                         } else {
1279                                 *pgid = pdb_group_rid_to_gid(rid);
1280                                 DEBUG(10,("local_sid_to_gid: mapping: %s -> %u\n", sid_string_static(psid), (unsigned int)(*pgid)));
1281                                 return True;
1282                         }
1283                 }
1284
1285                 return False;
1286         }
1287
1288         *pgid = group.gid;
1289
1290         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u)\n", sid_string_static(psid),
1291                 (unsigned int)*pgid));
1292
1293         return True;
1294 }
1295
1296 /**********************************************************************
1297  Marshall/unmarshall SAM_ACCOUNT structs.
1298  *********************************************************************/
1299
1300 #define TDB_FORMAT_STRING       "ddddddBBBBBBBBBBBBddBBwdwdBwwd"
1301
1302 /**********************************************************************
1303  Intialize a SAM_ACCOUNT struct from a BYTE buffer of size len
1304  *********************************************************************/
1305
1306 BOOL init_sam_from_buffer(SAM_ACCOUNT *sampass, uint8 *buf, uint32 buflen)
1307 {
1308
1309         /* times are stored as 32bit integer
1310            take care on system with 64bit wide time_t
1311            --SSS */
1312         uint32  logon_time,
1313                 logoff_time,
1314                 kickoff_time,
1315                 pass_last_set_time,
1316                 pass_can_change_time,
1317                 pass_must_change_time;
1318         char *username;
1319         char *domain;
1320         char *nt_username;
1321         char *dir_drive;
1322         char *unknown_str;
1323         char *munged_dial;
1324         char *fullname;
1325         char *homedir;
1326         char *logon_script;
1327         char *profile_path;
1328         char *acct_desc;
1329         char *workstations;
1330         uint32  username_len, domain_len, nt_username_len,
1331                 dir_drive_len, unknown_str_len, munged_dial_len,
1332                 fullname_len, homedir_len, logon_script_len,
1333                 profile_path_len, acct_desc_len, workstations_len;
1334
1335         uint32  user_rid, group_rid, fields_present, hours_len, unknown_6;
1336         uint16  acct_ctrl, logon_divs;
1337         uint16  bad_password_count, logon_count;
1338         uint8   *hours;
1339         static uint8    *lm_pw_ptr, *nt_pw_ptr;
1340         uint32          len = 0;
1341         uint32          lm_pw_len, nt_pw_len, hourslen;
1342         BOOL ret = True;
1343
1344         if(sampass == NULL || buf == NULL) {
1345                 DEBUG(0, ("init_sam_from_buffer: NULL parameters found!\n"));
1346                 return False;
1347         }
1348
1349         /* unpack the buffer into variables */
1350         len = tdb_unpack ((char *)buf, buflen, TDB_FORMAT_STRING,
1351                 &logon_time,
1352                 &logoff_time,
1353                 &kickoff_time,
1354                 &pass_last_set_time,
1355                 &pass_can_change_time,
1356                 &pass_must_change_time,
1357                 &username_len, &username,
1358                 &domain_len, &domain,
1359                 &nt_username_len, &nt_username,
1360                 &fullname_len, &fullname,
1361                 &homedir_len, &homedir,
1362                 &dir_drive_len, &dir_drive,
1363                 &logon_script_len, &logon_script,
1364                 &profile_path_len, &profile_path,
1365                 &acct_desc_len, &acct_desc,
1366                 &workstations_len, &workstations,
1367                 &unknown_str_len, &unknown_str,
1368                 &munged_dial_len, &munged_dial,
1369                 &user_rid,
1370                 &group_rid,
1371                 &lm_pw_len, &lm_pw_ptr,
1372                 &nt_pw_len, &nt_pw_ptr,
1373                 &acct_ctrl,
1374                 &fields_present,
1375                 &logon_divs,
1376                 &hours_len,
1377                 &hourslen, &hours,
1378                 &bad_password_count,
1379                 &logon_count,
1380                 &unknown_6);
1381
1382         if (len == -1)  {
1383                 ret = False;
1384                 goto done;
1385         }
1386
1387         pdb_set_logon_time(sampass, logon_time, PDB_SET);
1388         pdb_set_logoff_time(sampass, logoff_time, PDB_SET);
1389         pdb_set_kickoff_time(sampass, kickoff_time, PDB_SET);
1390         pdb_set_pass_can_change_time(sampass, pass_can_change_time, PDB_SET);
1391         pdb_set_pass_must_change_time(sampass, pass_must_change_time, PDB_SET);
1392         pdb_set_pass_last_set_time(sampass, pass_last_set_time, PDB_SET);
1393
1394         pdb_set_username(sampass, username, PDB_SET);
1395         pdb_set_domain(sampass, domain, PDB_SET);
1396         pdb_set_nt_username(sampass, nt_username, PDB_SET);
1397         pdb_set_fullname(sampass, fullname, PDB_SET);
1398
1399         if (homedir) {
1400                 pdb_set_homedir(sampass, homedir, PDB_SET);
1401         }
1402         else {
1403                 pdb_set_homedir(sampass,
1404                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_home()),
1405                         PDB_DEFAULT);
1406         }
1407
1408         if (dir_drive)
1409                 pdb_set_dir_drive(sampass, dir_drive, PDB_SET);
1410         else {
1411                 pdb_set_dir_drive(sampass,
1412                         talloc_sub_basic(sampass->mem_ctx,  username, lp_logon_drive()),
1413                         PDB_DEFAULT);
1414         }
1415
1416         if (logon_script)
1417                 pdb_set_logon_script(sampass, logon_script, PDB_SET);
1418         else {
1419                 pdb_set_logon_script(sampass,
1420                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_script()),
1421                         PDB_DEFAULT);
1422         }
1423
1424         if (profile_path) {
1425                 pdb_set_profile_path(sampass, profile_path, PDB_SET);
1426         } else {
1427                 pdb_set_profile_path(sampass,
1428                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_path()),
1429                         PDB_DEFAULT);
1430         }
1431
1432         pdb_set_acct_desc(sampass, acct_desc, PDB_SET);
1433         pdb_set_workstations(sampass, workstations, PDB_SET);
1434         pdb_set_munged_dial(sampass, munged_dial, PDB_SET);
1435
1436         if (lm_pw_ptr && lm_pw_len == LM_HASH_LEN) {
1437                 if (!pdb_set_lanman_passwd(sampass, lm_pw_ptr, PDB_SET)) {
1438                         ret = False;
1439                         goto done;
1440                 }
1441         }
1442
1443         if (nt_pw_ptr && nt_pw_len == NT_HASH_LEN) {
1444                 if (!pdb_set_nt_passwd(sampass, nt_pw_ptr, PDB_SET)) {
1445                         ret = False;
1446                         goto done;
1447                 }
1448         }
1449
1450         pdb_set_user_sid_from_rid(sampass, user_rid, PDB_SET);
1451         pdb_set_group_sid_from_rid(sampass, group_rid, PDB_SET);
1452         pdb_set_fields_present(sampass, fields_present, PDB_SET);
1453         pdb_set_hours_len(sampass, hours_len, PDB_SET);
1454         pdb_set_bad_password_count(sampass, bad_password_count, PDB_SET);
1455         pdb_set_logon_count(sampass, logon_count, PDB_SET);
1456         pdb_set_unknown_6(sampass, unknown_6, PDB_SET);
1457         pdb_set_acct_ctrl(sampass, acct_ctrl, PDB_SET);
1458         pdb_set_logon_divs(sampass, logon_divs, PDB_SET);
1459         pdb_set_hours(sampass, hours, PDB_SET);
1460
1461 done:
1462
1463         SAFE_FREE(username);
1464         SAFE_FREE(domain);
1465         SAFE_FREE(nt_username);
1466         SAFE_FREE(fullname);
1467         SAFE_FREE(homedir);
1468         SAFE_FREE(dir_drive);
1469         SAFE_FREE(logon_script);
1470         SAFE_FREE(profile_path);
1471         SAFE_FREE(acct_desc);
1472         SAFE_FREE(workstations);
1473         SAFE_FREE(munged_dial);
1474         SAFE_FREE(unknown_str);
1475         SAFE_FREE(hours);
1476
1477         return ret;
1478 }
1479
1480 /**********************************************************************
1481  Intialize a BYTE buffer from a SAM_ACCOUNT struct
1482  *********************************************************************/
1483
1484 uint32 init_buffer_from_sam (uint8 **buf, const SAM_ACCOUNT *sampass, BOOL size_only)
1485 {
1486         size_t len, buflen;
1487
1488         /* times are stored as 32bit integer
1489            take care on system with 64bit wide time_t
1490            --SSS */
1491         uint32  logon_time,
1492                 logoff_time,
1493                 kickoff_time,
1494                 pass_last_set_time,
1495                 pass_can_change_time,
1496                 pass_must_change_time;
1497
1498         uint32  user_rid, group_rid;
1499
1500         const char *username;
1501         const char *domain;
1502         const char *nt_username;
1503         const char *dir_drive;
1504         const char *unknown_str;
1505         const char *munged_dial;
1506         const char *fullname;
1507         const char *homedir;
1508         const char *logon_script;
1509         const char *profile_path;
1510         const char *acct_desc;
1511         const char *workstations;
1512         uint32  username_len, domain_len, nt_username_len,
1513                 dir_drive_len, unknown_str_len, munged_dial_len,
1514                 fullname_len, homedir_len, logon_script_len,
1515                 profile_path_len, acct_desc_len, workstations_len;
1516
1517         const uint8 *lm_pw;
1518         const uint8 *nt_pw;
1519         uint32  lm_pw_len = 16;
1520         uint32  nt_pw_len = 16;
1521
1522         /* do we have a valid SAM_ACCOUNT pointer? */
1523         if (sampass == NULL) {
1524                 DEBUG(0, ("init_buffer_from_sam: SAM_ACCOUNT is NULL!\n"));
1525                 return -1;
1526         }
1527
1528         *buf = NULL;
1529         buflen = 0;
1530
1531         logon_time = (uint32)pdb_get_logon_time(sampass);
1532         logoff_time = (uint32)pdb_get_logoff_time(sampass);
1533         kickoff_time = (uint32)pdb_get_kickoff_time(sampass);
1534         pass_can_change_time = (uint32)pdb_get_pass_can_change_time(sampass);
1535         pass_must_change_time = (uint32)pdb_get_pass_must_change_time(sampass);
1536         pass_last_set_time = (uint32)pdb_get_pass_last_set_time(sampass);
1537
1538         user_rid = pdb_get_user_rid(sampass);
1539         group_rid = pdb_get_group_rid(sampass);
1540
1541         username = pdb_get_username(sampass);
1542         if (username)
1543                 username_len = strlen(username) +1;
1544         else
1545                 username_len = 0;
1546
1547         domain = pdb_get_domain(sampass);
1548         if (domain)
1549                 domain_len = strlen(domain) +1;
1550         else
1551                 domain_len = 0;
1552
1553         nt_username = pdb_get_nt_username(sampass);
1554         if (nt_username)
1555                 nt_username_len = strlen(nt_username) +1;
1556         else
1557                 nt_username_len = 0;
1558
1559         fullname = pdb_get_fullname(sampass);
1560         if (fullname)
1561                 fullname_len = strlen(fullname) +1;
1562         else
1563                 fullname_len = 0;
1564
1565         /*
1566          * Only updates fields which have been set (not defaults from smb.conf)
1567          */
1568
1569         if (!IS_SAM_DEFAULT(sampass, PDB_DRIVE))
1570                 dir_drive = pdb_get_dir_drive(sampass);
1571         else
1572                 dir_drive = NULL;
1573         if (dir_drive)
1574                 dir_drive_len = strlen(dir_drive) +1;
1575         else
1576                 dir_drive_len = 0;
1577
1578         if (!IS_SAM_DEFAULT(sampass, PDB_SMBHOME))
1579                 homedir = pdb_get_homedir(sampass);
1580         else
1581                 homedir = NULL;
1582         if (homedir)
1583                 homedir_len = strlen(homedir) +1;
1584         else
1585                 homedir_len = 0;
1586
1587         if (!IS_SAM_DEFAULT(sampass, PDB_LOGONSCRIPT))
1588                 logon_script = pdb_get_logon_script(sampass);
1589         else
1590                 logon_script = NULL;
1591         if (logon_script)
1592                 logon_script_len = strlen(logon_script) +1;
1593         else
1594                 logon_script_len = 0;
1595
1596         if (!IS_SAM_DEFAULT(sampass, PDB_PROFILE))
1597                 profile_path = pdb_get_profile_path(sampass);
1598         else
1599                 profile_path = NULL;
1600         if (profile_path)
1601                 profile_path_len = strlen(profile_path) +1;
1602         else
1603                 profile_path_len = 0;
1604
1605         lm_pw = pdb_get_lanman_passwd(sampass);
1606         if (!lm_pw)
1607                 lm_pw_len = 0;
1608
1609         nt_pw = pdb_get_nt_passwd(sampass);
1610         if (!nt_pw)
1611                 nt_pw_len = 0;
1612
1613         acct_desc = pdb_get_acct_desc(sampass);
1614         if (acct_desc)
1615                 acct_desc_len = strlen(acct_desc) +1;
1616         else
1617                 acct_desc_len = 0;
1618
1619         workstations = pdb_get_workstations(sampass);
1620         if (workstations)
1621                 workstations_len = strlen(workstations) +1;
1622         else
1623                 workstations_len = 0;
1624
1625         unknown_str = NULL;
1626         unknown_str_len = 0;
1627
1628         munged_dial = pdb_get_munged_dial(sampass);
1629         if (munged_dial)
1630                 munged_dial_len = strlen(munged_dial) +1;
1631         else
1632                 munged_dial_len = 0;
1633
1634         /* one time to get the size needed */
1635         len = tdb_pack(NULL, 0,  TDB_FORMAT_STRING,
1636                 logon_time,
1637                 logoff_time,
1638                 kickoff_time,
1639                 pass_last_set_time,
1640                 pass_can_change_time,
1641                 pass_must_change_time,
1642                 username_len, username,
1643                 domain_len, domain,
1644                 nt_username_len, nt_username,
1645                 fullname_len, fullname,
1646                 homedir_len, homedir,
1647                 dir_drive_len, dir_drive,
1648                 logon_script_len, logon_script,
1649                 profile_path_len, profile_path,
1650                 acct_desc_len, acct_desc,
1651                 workstations_len, workstations,
1652                 unknown_str_len, unknown_str,
1653                 munged_dial_len, munged_dial,
1654                 user_rid,
1655                 group_rid,
1656                 lm_pw_len, lm_pw,
1657                 nt_pw_len, nt_pw,
1658                 pdb_get_acct_ctrl(sampass),
1659                 pdb_get_fields_present(sampass),
1660                 pdb_get_logon_divs(sampass),
1661                 pdb_get_hours_len(sampass),
1662                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1663                 pdb_get_bad_password_count(sampass),
1664                 pdb_get_logon_count(sampass),
1665                 pdb_get_unknown_6(sampass));
1666
1667
1668         if (size_only)
1669                 return buflen;
1670
1671         /* malloc the space needed */
1672         if ( (*buf=(uint8*)malloc(len)) == NULL) {
1673                 DEBUG(0,("init_buffer_from_sam: Unable to malloc() memory for buffer!\n"));
1674                 return (-1);
1675         }
1676
1677         /* now for the real call to tdb_pack() */
1678         buflen = tdb_pack((char *)*buf, len,  TDB_FORMAT_STRING,
1679                 logon_time,
1680                 logoff_time,
1681                 kickoff_time,
1682                 pass_last_set_time,
1683                 pass_can_change_time,
1684                 pass_must_change_time,
1685                 username_len, username,
1686                 domain_len, domain,
1687                 nt_username_len, nt_username,
1688                 fullname_len, fullname,
1689                 homedir_len, homedir,
1690                 dir_drive_len, dir_drive,
1691                 logon_script_len, logon_script,
1692                 profile_path_len, profile_path,
1693                 acct_desc_len, acct_desc,
1694                 workstations_len, workstations,
1695                 unknown_str_len, unknown_str,
1696                 munged_dial_len, munged_dial,
1697                 user_rid,
1698                 group_rid,
1699                 lm_pw_len, lm_pw,
1700                 nt_pw_len, nt_pw,
1701                 pdb_get_acct_ctrl(sampass),
1702                 pdb_get_fields_present(sampass),
1703                 pdb_get_logon_divs(sampass),
1704                 pdb_get_hours_len(sampass),
1705                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1706                 pdb_get_bad_password_count(sampass),
1707                 pdb_get_logon_count(sampass),
1708                 pdb_get_unknown_6(sampass));
1709
1710
1711         /* check to make sure we got it correct */
1712         if (buflen != len) {
1713                 DEBUG(0, ("init_buffer_from_sam: somthing odd is going on here: bufflen (%lu) != len (%lu) in tdb_pack operations!\n",
1714                           (unsigned long)buflen, (unsigned long)len));
1715                 /* error */
1716                 SAFE_FREE (*buf);
1717                 return (-1);
1718         }
1719
1720         return (buflen);
1721 }
1722
1723
1724 /**********************************************************************
1725 **********************************************************************/
1726
1727 static BOOL get_free_ugid_range(uint32 *low, uint32 *high)
1728 {
1729         uid_t u_low, u_high;
1730         gid_t g_low, g_high;
1731
1732         if (!lp_idmap_uid(&u_low, &u_high) || !lp_idmap_gid(&g_low, &g_high)) {
1733                 return False;
1734         }
1735
1736         *low  = (u_low < g_low)   ? u_low  : g_low;
1737         *high = (u_high < g_high) ? u_high : g_high;
1738
1739         return True;
1740 }
1741
1742 /******************************************************************
1743  Get the the non-algorithmic RID range if idmap range are defined
1744 ******************************************************************/
1745
1746 BOOL get_free_rid_range(uint32 *low, uint32 *high)
1747 {
1748         uint32 id_low, id_high;
1749
1750         if (!lp_enable_rid_algorithm()) {
1751                 *low = BASE_RID;
1752                 *high = (uint32)-1;
1753         }
1754
1755         if (!get_free_ugid_range(&id_low, &id_high)) {
1756                 return False;
1757         }
1758
1759         *low = fallback_pdb_uid_to_user_rid(id_low);
1760         if (fallback_pdb_user_rid_to_uid((uint32)-1) < id_high) {
1761                 *high = (uint32)-1;
1762         } else {
1763                 *high = fallback_pdb_uid_to_user_rid(id_high);
1764         }
1765
1766         return True;
1767 }
1768
1769