source3/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.unknown_3 = 0x00ffffff;   /* don't know */
  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  Alloc 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  Alloc 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 /*************************************************************
 194  Initialises a struct sam_passwd with sane values.
 195  ************************************************************/
 196
 197 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 198 {
 199         NTSTATUS ret;
 200
 201         if (!pwd) {
 202                 return NT_STATUS_UNSUCCESSFUL;
 203         }
 204
 205         pdb_fill_default_sam(sam_account);
 206
 207         pdb_set_username(sam_account, pwd->pw_name, PDB_SET);
 208         pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET);
 209
 210         pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET);
 211
 212         pdb_set_domain (sam_account, get_global_sam_name(), PDB_DEFAULT);
 213
 214         /* When we get a proper uid -> SID and SID -> uid allocation
 215            mechinism, we should call it here.
 216
 217            We can't just set this to 0 or allow it only to be filled
 218            in when added to the backend, because the user's SID
 219            may already be in security descriptors etc.
 220
 221            -- abartlet 11-May-02
 222         */
 223
 224         ret = pdb_set_sam_sids(sam_account, pwd);
 225         if (!NT_STATUS_IS_OK(ret)) return ret;
 226
 227         /* check if this is a user account or a machine account */
 228         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 229         {
 230                 pdb_set_profile_path(sam_account,
 231                                      talloc_sub_specified((sam_account)->mem_ctx,
 232                                                             lp_logon_path(),
 233                                                             pwd->pw_name, global_myname(),
 234                                                             pwd->pw_uid, pwd->pw_gid),
 235                                      PDB_DEFAULT);
 236
 237                 pdb_set_homedir(sam_account,
 238                                 talloc_sub_specified((sam_account)->mem_ctx,
 239                                                        lp_logon_home(),
 240                                                        pwd->pw_name, global_myname(),
 241                                                        pwd->pw_uid, pwd->pw_gid),
 242                                 PDB_DEFAULT);
 243
 244                 pdb_set_dir_drive(sam_account,
 245                                   talloc_sub_specified((sam_account)->mem_ctx,
 246                                                          lp_logon_drive(),
 247                                                          pwd->pw_name, global_myname(),
 248                                                          pwd->pw_uid, pwd->pw_gid),
 249                                   PDB_DEFAULT);
 250
 251                 pdb_set_logon_script(sam_account,
 252                                      talloc_sub_specified((sam_account)->mem_ctx,
 253                                                             lp_logon_script(),
 254                                                             pwd->pw_name, global_myname(),
 255                                                             pwd->pw_uid, pwd->pw_gid),
 256                                      PDB_DEFAULT);
 257                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) {
 258                         DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name));
 259                         return NT_STATUS_UNSUCCESSFUL;
 260                 }
 261         } else {
 262                 if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) {
 263                         DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name));
 264                         return NT_STATUS_UNSUCCESSFUL;
 265                 }
 266         }
 267         return NT_STATUS_OK;
 268 }
 269
 270
 271 /*************************************************************
 272  Initialises a struct sam_passwd with sane values.
 273  ************************************************************/
 274
 275 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 276 {
 277         NTSTATUS nt_status;
 278
 279         if (!pwd) {
 280                 new_sam_acct = NULL;
 281                 return NT_STATUS_INVALID_PARAMETER;
 282         }
 283
 284         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 285                 new_sam_acct = NULL;
 286                 return nt_status;
 287         }
 288
 289         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 290                 pdb_free_sam(new_sam_acct);
 291                 new_sam_acct = NULL;
 292                 return nt_status;
 293         }
 294
 295         return NT_STATUS_OK;
 296 }
 297
 298
 299 /*************************************************************
 300  Initialises a SAM_ACCOUNT ready to add a new account, based
 301  on the UNIX user.  Pass in a RID if you have one
 302  ************************************************************/
 303
 304 NTSTATUS pdb_init_sam_new(SAM_ACCOUNT **new_sam_acct, const char *username,
 305                           uint32 rid)
 306 {
 307         NTSTATUS        nt_status = NT_STATUS_NO_MEMORY;
 308         struct passwd   *pwd;
 309         BOOL            ret;
 310
 311         pwd = Get_Pwnam(username);
 312
 313         if (!pwd)
 314                 return NT_STATUS_NO_SUCH_USER;
 315
 316         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(new_sam_acct, pwd))) {
 317                 *new_sam_acct = NULL;
 318                 return nt_status;
 319         }
 320
 321         /* see if we need to generate a new rid using the 2.2 algorithm */
 322         if ( rid == 0 && lp_enable_rid_algorithm() ) {
 323                 DEBUG(10,("pdb_init_sam_new: no RID specified.  Generating one via old algorithm\n"));
 324                 rid = fallback_pdb_uid_to_user_rid(pwd->pw_uid);
 325         }
 326
 327         /* set the new SID */
 328
 329         ret = pdb_set_user_sid_from_rid( *new_sam_acct, rid, PDB_SET );
 330
 331         return (ret ? NT_STATUS_OK : NT_STATUS_NO_SUCH_USER);
 332 }
 333
 334
 335 /**
 336  * Free the contets of the SAM_ACCOUNT, but not the structure.
 337  *
 338  * Also wipes the LM and NT hashes and plaintext password from
 339  * memory.
 340  *
 341  * @param user SAM_ACCOUNT to free members of.
 342  **/
 343
 344 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 345 {
 346
 347         /* Kill off sensitive data.  Free()ed by the
 348            talloc mechinism */
 349
 350         data_blob_clear_free(&(user->private.lm_pw));
 351         data_blob_clear_free(&(user->private.nt_pw));
 352         if (user->private.plaintext_pw!=NULL)
 353                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 354
 355         if (user->private.backend_private_data && user->private.backend_private_data_free_fn) {
 356                 user->private.backend_private_data_free_fn(&user->private.backend_private_data);
 357         }
 358 }
 359
 360
 361 /************************************************************
 362  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 363  ***********************************************************/
 364
 365 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 366 {
 367         if (user == NULL) {
 368                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 369 #if 0
 370                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 371 #endif
 372                 return NT_STATUS_UNSUCCESSFUL;
 373         }
 374
 375         pdb_free_sam_contents(user);
 376
 377         pdb_fill_default_sam(user);
 378
 379         return NT_STATUS_OK;
 380 }
 381
 382
 383 /************************************************************
 384  Free the SAM_ACCOUNT and the member pointers.
 385  ***********************************************************/
 386
 387 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 388 {
 389         if (*user == NULL) {
 390                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 391 #if 0
 392                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 393 #endif
 394                 return NT_STATUS_UNSUCCESSFUL;
 395         }
 396
 397         pdb_free_sam_contents(*user);
 398
 399         if ((*user)->free_fn) {
 400                 (*user)->free_fn(user);
 401         }
 402
 403         return NT_STATUS_OK;
 404 }
 405
 406 /**************************************************************************
 407  * This function will take care of all the steps needed to correctly
 408  * allocate and set the user SID, please do use this function to create new
 409  * users, messing with SIDs is not good.
 410  *
 411  * account_data must be provided initialized, pwd may be null.
 412  *                                                                      SSS
 413  ***************************************************************************/
 414
 415 NTSTATUS pdb_set_sam_sids(SAM_ACCOUNT *account_data, const struct passwd *pwd)
 416 {
 417         const char *guest_account = lp_guestaccount();
 418         GROUP_MAP map;
 419
 420         if (!account_data || !pwd) {
 421                 return NT_STATUS_INVALID_PARAMETER;
 422         }
 423
 424         /* this is a hack this thing should not be set
 425            this way --SSS */
 426         if (!(guest_account && *guest_account)) {
 427                 DEBUG(1, ("NULL guest account!?!?\n"));
 428                 return NT_STATUS_UNSUCCESSFUL;
 429         } else {
 430                 /* Ensure this *must* be set right */
 431                 if (strcmp(pwd->pw_name, guest_account) == 0) {
 432                         if (!pdb_set_user_sid_from_rid(account_data, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) {
 433                                 return NT_STATUS_UNSUCCESSFUL;
 434                         }
 435                         if (!pdb_set_group_sid_from_rid(account_data, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) {
 436                                 return NT_STATUS_UNSUCCESSFUL;
 437                         }
 438                         return NT_STATUS_OK;
 439                 }
 440         }
 441
 442         if (!pdb_set_user_sid_from_rid(account_data, fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 443                 DEBUG(0,("Can't set User SID from RID!\n"));
 444                 return NT_STATUS_INVALID_PARAMETER;
 445         }
 446
 447         /* call the mapping code here */
 448         if(pdb_getgrgid(&map, pwd->pw_gid)) {
 449                 if (!pdb_set_group_sid(account_data, &map.sid, PDB_SET)){
 450                         DEBUG(0,("Can't set Group SID!\n"));
 451                         return NT_STATUS_INVALID_PARAMETER;
 452                 }
 453         }
 454         else {
 455                 if (!pdb_set_group_sid_from_rid(account_data, pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 456                         DEBUG(0,("Can't set Group SID\n"));
 457                         return NT_STATUS_INVALID_PARAMETER;
 458                 }
 459         }
 460
 461         return NT_STATUS_OK;
 462 }
 463
 464 /**********************************************************
 465  Encode the account control bits into a string.
 466  length = length of string to encode into (including terminating
 467  null). length *MUST BE MORE THAN 2* !
 468  **********************************************************/
 469
 470 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 471 {
 472         static fstring acct_str;
 473         size_t i = 0;
 474
 475         acct_str[i++] = '[';
 476
 477         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 478         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 479         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 480         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 481         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 482         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 483         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 484         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 485         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 486         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 487         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 488
 489         for ( ; i < length - 2 ; i++ )
 490                 acct_str[i] = ' ';
 491
 492         i = length - 2;
 493         acct_str[i++] = ']';
 494         acct_str[i++] = '\0';
 495
 496         return acct_str;
 497 }
 498
 499 /**********************************************************
 500  Decode the account control bits from a string.
 501  **********************************************************/
 502
 503 uint16 pdb_decode_acct_ctrl(const char *p)
 504 {
 505         uint16 acct_ctrl = 0;
 506         BOOL finished = False;
 507
 508         /*
 509          * Check if the account type bits have been encoded after the
 510          * NT password (in the form [NDHTUWSLXI]).
 511          */
 512
 513         if (*p != '[')
 514                 return 0;
 515
 516         for (p++; *p && !finished; p++) {
 517                 switch (*p) {
 518                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 519                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 520                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 521                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 522                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 523                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 524                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 525                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 526                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 527                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 528                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 529             case ' ': { break; }
 530                         case ':':
 531                         case '\n':
 532                         case '\0':
 533                         case ']':
 534                         default:  { finished = True; }
 535                 }
 536         }
 537
 538         return acct_ctrl;
 539 }
 540
 541 /*************************************************************
 542  Routine to set 32 hex password characters from a 16 byte array.
 543 **************************************************************/
 544
 545 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 546 {
 547         if (pwd != NULL) {
 548                 int i;
 549                 for (i = 0; i < 16; i++)
 550                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 551         } else {
 552                 if (acct_ctrl & ACB_PWNOTREQ)
 553                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 554                 else
 555                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 556         }
 557 }
 558
 559 /*************************************************************
 560  Routine to get the 32 hex characters and turn them
 561  into a 16 byte array.
 562 **************************************************************/
 563
 564 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 565 {
 566         int i;
 567         unsigned char   lonybble, hinybble;
 568         const char      *hexchars = "0123456789ABCDEF";
 569         char           *p1, *p2;
 570
 571         if (!p)
 572                 return (False);
 573
 574         for (i = 0; i < 32; i += 2) {
 575                 hinybble = toupper(p[i]);
 576                 lonybble = toupper(p[i + 1]);
 577
 578                 p1 = strchr(hexchars, hinybble);
 579                 p2 = strchr(hexchars, lonybble);
 580
 581                 if (!p1 || !p2)
 582                         return (False);
 583
 584                 hinybble = PTR_DIFF(p1, hexchars);
 585                 lonybble = PTR_DIFF(p2, hexchars);
 586
 587                 pwd[i / 2] = (hinybble << 4) | lonybble;
 588         }
 589         return (True);
 590 }
 591
 592 int algorithmic_rid_base(void)
 593 {
 594         static int rid_offset = 0;
 595
 596         if (rid_offset != 0)
 597                 return rid_offset;
 598
 599         rid_offset = lp_algorithmic_rid_base();
 600
 601         if (rid_offset < BASE_RID) {
 602                 /* Try to prevent admin foot-shooting, we can't put algorithmic
 603                    rids below 1000, that's the 'well known RIDs' on NT */
 604                 DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID));
 605                 rid_offset = BASE_RID;
 606         }
 607         if (rid_offset & 1) {
 608                 DEBUG(0, ("algorithmic rid base must be even\n"));
 609                 rid_offset += 1;
 610         }
 611         return rid_offset;
 612 }
 613
 614 /*******************************************************************
 615  Converts NT user RID to a UNIX uid.
 616  ********************************************************************/
 617
 618 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 619 {
 620         int rid_offset = algorithmic_rid_base();
 621         return (uid_t)(((user_rid & (~USER_RID_TYPE)) - rid_offset)/RID_MULTIPLIER);
 622 }
 623
 624 /*******************************************************************
 625  converts UNIX uid to an NT User RID.
 626  ********************************************************************/
 627
 628 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 629 {
 630         int rid_offset = algorithmic_rid_base();
 631         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 632 }
 633
 634 /*******************************************************************
 635  Converts NT group RID to a UNIX gid.
 636  ********************************************************************/
 637
 638 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 639 {
 640         int rid_offset = algorithmic_rid_base();
 641         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 642 }
 643
 644 /*******************************************************************
 645  converts NT Group RID to a UNIX uid.
 646
 647  warning: you must not call that function only
 648  you must do a call to the group mapping first.
 649  there is not anymore a direct link between the gid and the rid.
 650  ********************************************************************/
 651
 652 uint32 pdb_gid_to_group_rid(gid_t gid)
 653 {
 654         int rid_offset = algorithmic_rid_base();
 655         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 656 }
 657
 658 /*******************************************************************
 659  Decides if a RID is a well known RID.
 660  ********************************************************************/
 661
 662 static BOOL pdb_rid_is_well_known(uint32 rid)
 663 {
 664         /* Not using rid_offset here, because this is the actual
 665            NT fixed value (1000) */
 666
 667         return (rid < BASE_RID);
 668 }
 669
 670 /*******************************************************************
 671  Decides if a RID is a user or group RID.
 672  ********************************************************************/
 673
 674 BOOL fallback_pdb_rid_is_user(uint32 rid)
 675 {
 676   /* lkcl i understand that NT attaches an enumeration to a RID
 677    * such that it can be identified as either a user, group etc
 678    * type.  there are 5 such categories, and they are documented.
 679    */
 680         /* However, they are not in the RID, just somthing you can query
 681            seperatly.  Sorry luke :-) */
 682
 683    if(pdb_rid_is_well_known(rid)) {
 684       /*
 685        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 686        * and DOMAIN_USER_RID_GUEST.
 687        */
 688      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 689        return True;
 690    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 691      return True;
 692    }
 693    return False;
 694 }
 695
 696 /*******************************************************************
 697  Convert a rid into a name. Used in the lookup SID rpc.
 698  ********************************************************************/
 699
 700 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 701 {
 702         uint32 rid;
 703         SAM_ACCOUNT *sam_account = NULL;
 704         GROUP_MAP map;
 705
 706         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 707                 DEBUG(0,("local_lookup_sid: sid_peek_check_rid return False! SID: %s\n",
 708                         sid_string_static(&map.sid)));
 709                 return False;
 710         }
 711         *psid_name_use = SID_NAME_UNKNOWN;
 712
 713         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 714
 715         if (rid == DOMAIN_USER_RID_ADMIN) {
 716                 const char **admin_list = lp_admin_users(-1);
 717                 *psid_name_use = SID_NAME_USER;
 718                 if (admin_list) {
 719                         const char *p = *admin_list;
 720                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 721                                 fstrcpy(name, "Administrator");
 722                 } else {
 723                         fstrcpy(name, "Administrator");
 724                 }
 725                 return True;
 726         }
 727
 728         /*
 729          * Don't try to convert the rid to a name if
 730          * running in appliance mode
 731          */
 732
 733         if (lp_hide_local_users())
 734                 return False;
 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         become_root();
 743         if (pdb_getsampwsid(sam_account, sid)) {
 744                 unbecome_root();
 745                 fstrcpy(name, pdb_get_username(sam_account));
 746                 *psid_name_use = SID_NAME_USER;
 747
 748                 pdb_free_sam(&sam_account);
 749
 750                 return True;
 751         }
 752         unbecome_root();
 753         pdb_free_sam(&sam_account);
 754
 755         if (pdb_getgrsid(&map, *sid)) {
 756                 if (map.gid!=(gid_t)-1) {
 757                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 758                 } else {
 759                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 760                 }
 761
 762                 fstrcpy(name, map.nt_name);
 763                 *psid_name_use = map.sid_name_use;
 764                 return True;
 765         }
 766
 767         if (fallback_pdb_rid_is_user(rid)) {
 768                 uid_t uid;
 769                 struct passwd *pw = NULL;
 770
 771                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 772
 773                 uid = fallback_pdb_user_rid_to_uid(rid);
 774                 pw = sys_getpwuid( uid );
 775
 776                 DEBUG(5,("local_lookup_sid: looking up uid %u %s\n", (unsigned int)uid,
 777                          pw ? "succeeded" : "failed" ));
 778
 779                 if ( !pw )
 780                         fstr_sprintf(name, "unix_user.%u", (unsigned int)uid);
 781                 else
 782                         fstrcpy( name, pw->pw_name );
 783
 784                 DEBUG(5,("local_lookup_sid: found user %s for rid %u\n", name,
 785                          (unsigned int)rid ));
 786
 787                 *psid_name_use = SID_NAME_USER;
 788
 789                 return ( pw != NULL );
 790         } else {
 791                 gid_t gid;
 792                 struct group *gr;
 793
 794                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 795
 796                 gid = pdb_group_rid_to_gid(rid);
 797                 gr = getgrgid(gid);
 798
 799                 *psid_name_use = SID_NAME_ALIAS;
 800
 801                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 802                          gr ? "succeeded" : "failed" ));
 803
 804                 if( !gr )
 805                         fstr_sprintf(name, "unix_group.%u", (unsigned int)gid);
 806                 else
 807                         fstrcpy( name, gr->gr_name);
 808
 809                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 810                          (unsigned int)rid ));
 811
 812                 /* assume fallback groups aer domain global groups */
 813
 814                 *psid_name_use = SID_NAME_DOM_GRP;
 815
 816                 return ( gr != NULL );
 817         }
 818 }
 819
 820 /*******************************************************************
 821  Convert a name into a SID. Used in the lookup name rpc.
 822  ********************************************************************/
 823
 824 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 825 {
 826         extern DOM_SID global_sid_World_Domain;
 827         DOM_SID local_sid;
 828         fstring user;
 829         SAM_ACCOUNT *sam_account = NULL;
 830         struct group *grp;
 831         GROUP_MAP map;
 832
 833         *psid_name_use = SID_NAME_UNKNOWN;
 834
 835         /*
 836          * user may be quoted a const string, and map_username and
 837          * friends can modify it. Make a modifiable copy. JRA.
 838          */
 839
 840         fstrcpy(user, c_user);
 841
 842         sid_copy(&local_sid, get_global_sam_sid());
 843
 844         /*
 845          * Special case for MACHINE\Everyone. Map to the world_sid.
 846          */
 847
 848         if(strequal(user, "Everyone")) {
 849                 sid_copy( psid, &global_sid_World_Domain);
 850                 sid_append_rid(psid, 0);
 851                 *psid_name_use = SID_NAME_ALIAS;
 852                 return True;
 853         }
 854
 855         /*
 856          * Don't lookup local unix users if running in appliance mode
 857          */
 858         if (lp_hide_local_users())
 859                 return False;
 860
 861         (void)map_username(user);
 862
 863         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 864                 return False;
 865         }
 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         unbecome_root();
 877
 878         pdb_free_sam(&sam_account);
 879
 880         /*
 881          * Maybe it was a group ?
 882          */
 883
 884         /* check if it's a mapped group */
 885         if (pdb_getgrnam(&map, user)) {
 886                 /* yes it's a mapped group */
 887                 sid_copy(&local_sid, &map.sid);
 888                 *psid_name_use = map.sid_name_use;
 889         } else {
 890                 /* it's not a mapped group */
 891                 grp = getgrnam(user);
 892                 if(!grp)
 893                         return False;
 894
 895                 /*
 896                  *check if it's mapped, if it is reply it doesn't exist
 897                  *
 898                  * that's to prevent this case:
 899                  *
 900                  * unix group ug is mapped to nt group ng
 901                  * someone does a lookup on ug
 902                  * we must not reply as it doesn't "exist" anymore
 903                  * for NT. For NT only ng exists.
 904                  * JFM, 30/11/2001
 905                  */
 906
 907                 if (pdb_getgrgid(&map, grp->gr_gid)){
 908                         return False;
 909                 }
 910
 911                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 912                 *psid_name_use = SID_NAME_ALIAS;
 913         }
 914
 915         sid_copy( psid, &local_sid);
 916
 917         return True;
 918 }
 919
 920 /*************************************************************
 921  Change a password entry in the local smbpasswd file.
 922  *************************************************************/
 923
 924 BOOL local_password_change(const char *user_name, int local_flags,
 925                            const char *new_passwd,
 926                            char *err_str, size_t err_str_len,
 927                            char *msg_str, size_t msg_str_len)
 928 {
 929         SAM_ACCOUNT     *sam_pass=NULL;
 930         uint16 other_acb;
 931
 932         *err_str = '\0';
 933         *msg_str = '\0';
 934
 935         /* Get the smb passwd entry for this user */
 936         pdb_init_sam(&sam_pass);
 937
 938         become_root();
 939         if(!pdb_getsampwnam(sam_pass, user_name)) {
 940                 unbecome_root();
 941                 pdb_free_sam(&sam_pass);
 942
 943                 if ((local_flags & LOCAL_ADD_USER) || (local_flags & LOCAL_DELETE_USER)) {
 944                         /* Might not exist in /etc/passwd.  Use rid algorithm here */
 945                         if (!NT_STATUS_IS_OK(pdb_init_sam_new(&sam_pass, user_name, 0))) {
 946                                 slprintf(err_str, err_str_len-1, "Failed to initialise SAM_ACCOUNT for user %s.\n", user_name);
 947                                 return False;
 948                         }
 949                 } else {
 950                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
 951                         return False;
 952                 }
 953         } else {
 954                 unbecome_root();
 955                 /* the entry already existed */
 956                 local_flags &= ~LOCAL_ADD_USER;
 957         }
 958
 959         /* the 'other' acb bits not being changed here */
 960         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
 961         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 962                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
 963                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
 964                         pdb_free_sam(&sam_pass);
 965                         return False;
 966                 }
 967         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 968                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
 969                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
 970                         pdb_free_sam(&sam_pass);
 971                         return False;
 972                 }
 973         } else {
 974                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
 975                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
 976                         pdb_free_sam(&sam_pass);
 977                         return False;
 978                 }
 979         }
 980
 981         /*
 982          * We are root - just write the new password
 983          * and the valid last change time.
 984          */
 985
 986         if (local_flags & LOCAL_DISABLE_USER) {
 987                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
 988                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
 989                         pdb_free_sam(&sam_pass);
 990                         return False;
 991                 }
 992         } else if (local_flags & LOCAL_ENABLE_USER) {
 993                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 994                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 995                         pdb_free_sam(&sam_pass);
 996                         return False;
 997                 }
 998         }
 999
1000         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1001                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
1002                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1003                         pdb_free_sam(&sam_pass);
1004                         return False;
1005                 }
1006         } else if (local_flags & LOCAL_SET_PASSWORD) {
1007                 /*
1008                  * If we're dealing with setting a completely empty user account
1009                  * ie. One with a password of 'XXXX', but not set disabled (like
1010                  * an account created from scratch) then if the old password was
1011                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1012                  * We remove that as we're giving this user their first password
1013                  * and the decision hasn't really been made to disable them (ie.
1014                  * don't create them disabled). JRA.
1015                  */
1016                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1017                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1018                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1019                                 pdb_free_sam(&sam_pass);
1020                                 return False;
1021                         }
1022                 }
1023                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
1024                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1025                         pdb_free_sam(&sam_pass);
1026                         return False;
1027                 }
1028
1029                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1030                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1031                         pdb_free_sam(&sam_pass);
1032                         return False;
1033                 }
1034         }
1035
1036         if (local_flags & LOCAL_ADD_USER) {
1037                 if (pdb_add_sam_account(sam_pass)) {
1038                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1039                         pdb_free_sam(&sam_pass);
1040                         return True;
1041                 } else {
1042                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1043                         pdb_free_sam(&sam_pass);
1044                         return False;
1045                 }
1046         } else if (local_flags & LOCAL_DELETE_USER) {
1047                 if (!pdb_delete_sam_account(sam_pass)) {
1048                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1049                         pdb_free_sam(&sam_pass);
1050                         return False;
1051                 }
1052                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1053         } else {
1054                 if(!pdb_update_sam_account(sam_pass)) {
1055                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1056                         pdb_free_sam(&sam_pass);
1057                         return False;
1058                 }
1059                 if(local_flags & LOCAL_DISABLE_USER)
1060                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1061                 else if (local_flags & LOCAL_ENABLE_USER)
1062                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1063                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1064                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1065         }
1066
1067         pdb_free_sam(&sam_pass);
1068         return True;
1069 }
1070
1071 /****************************************************************************
1072  Convert a uid to SID - algorithmic.
1073 ****************************************************************************/
1074
1075 static DOM_SID *algorithmic_uid_to_sid(DOM_SID *psid, uid_t uid)
1076 {
1077         if ( !lp_enable_rid_algorithm() )
1078                 return NULL;
1079
1080         DEBUG(8,("algorithmic_uid_to_sid: falling back to RID algorithm\n"));
1081         sid_copy( psid, get_global_sam_sid() );
1082         sid_append_rid( psid, fallback_pdb_uid_to_user_rid(uid) );
1083         DEBUG(10,("algorithmic_uid_to_sid:  uid (%d) -> SID %s.\n",
1084                 (unsigned int)uid, sid_string_static(psid) ));
1085
1086         return psid;
1087 }
1088
1089 /****************************************************************************
1090  Convert a uid to SID - locally.
1091 ****************************************************************************/
1092
1093 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
1094 {
1095         SAM_ACCOUNT *sampw = NULL;
1096         struct passwd *unix_pw;
1097         BOOL ret;
1098
1099         unix_pw = sys_getpwuid( uid );
1100
1101         if ( !unix_pw ) {
1102                 DEBUG(4,("local_uid_to_sid: host has no idea of uid %lu\n", (unsigned long)uid));
1103                 return algorithmic_uid_to_sid( psid, uid);
1104         }
1105
1106         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1107                 DEBUG(0,("local_uid_to_sid: failed to allocate SAM_ACCOUNT object\n"));
1108                 return NULL;
1109         }
1110
1111         become_root();
1112         ret = pdb_getsampwnam( sampw, unix_pw->pw_name );
1113         unbecome_root();
1114
1115         if ( ret )
1116                 sid_copy( psid, pdb_get_user_sid(sampw) );
1117         else {
1118                 DEBUG(4,("local_uid_to_sid: User %s [uid == %lu] has no samba account\n",
1119                         unix_pw->pw_name, (unsigned long)uid));
1120
1121                 return algorithmic_uid_to_sid( psid, uid);
1122         }
1123
1124         DEBUG(10,("local_uid_to_sid:  uid (%d) -> SID %s (%s).\n",
1125                 (unsigned int)uid, sid_string_static(psid), unix_pw->pw_name));
1126
1127         return psid;
1128 }
1129
1130 /****************************************************************************
1131  Convert a SID to uid - locally.
1132 ****************************************************************************/
1133
1134 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1135 {
1136         SAM_ACCOUNT *sampw = NULL;
1137         struct passwd *unix_pw;
1138         const char *user_name;
1139
1140         *name_type = SID_NAME_UNKNOWN;
1141
1142         /*
1143          * We can only convert to a uid if this is our local
1144          * Domain SID (ie. we are the controling authority).
1145          */
1146         if (!sid_check_is_in_our_domain(psid) ) {
1147                 DEBUG(5,("local_sid_to_uid: this SID (%s) is not from our domain\n", sid_string_static(psid)));
1148                 return False;
1149         }
1150
1151         /* lookup the user account */
1152
1153         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1154                 DEBUG(0,("local_sid_to_uid: Failed to allocate memory for SAM_ACCOUNT object\n"));
1155                 return False;
1156         }
1157
1158         become_root();
1159         if ( !pdb_getsampwsid(sampw, psid) ) {
1160                 unbecome_root();
1161                 DEBUG(8,("local_sid_to_uid: Could not find SID %s in passdb\n",
1162                         sid_string_static(psid)));
1163                 return False;
1164         }
1165         unbecome_root();
1166
1167         user_name = pdb_get_username(sampw);
1168
1169         unix_pw = sys_getpwnam( user_name );
1170
1171         if ( !unix_pw ) {
1172                 DEBUG(0,("local_sid_to_uid: %s found in passdb but getpwnam() return NULL!\n",
1173                         user_name));
1174                 pdb_free_sam( &sampw );
1175                 return False;
1176         }
1177
1178         *puid = unix_pw->pw_uid;
1179
1180         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_string_static(psid),
1181                 (unsigned int)*puid, user_name ));
1182
1183         *name_type = SID_NAME_USER;
1184
1185         return True;
1186 }
1187
1188 /****************************************************************************
1189  Convert a gid to SID - locally.
1190 ****************************************************************************/
1191
1192 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
1193 {
1194         GROUP_MAP group;
1195         BOOL ret;
1196
1197         /* we don't need to disable winbindd since the gid is stored in
1198            the GROUP_MAP object */
1199
1200         /* done as root since ldap backend requires root to open a connection */
1201
1202         become_root();
1203         ret = pdb_getgrgid( &group, gid );
1204         unbecome_root();
1205
1206         if ( !ret ) {
1207
1208                 /* fallback to rid mapping if enabled */
1209
1210                 if ( lp_enable_rid_algorithm() ) {
1211                         sid_copy(psid, get_global_sam_sid());
1212                         sid_append_rid(psid, pdb_gid_to_group_rid(gid));
1213
1214                         DEBUG(10,("local_gid_to_sid: Fall back to algorithmic mapping: %u -> %s\n",
1215                                 (unsigned int)gid, sid_string_static(psid)));
1216
1217                         return psid;
1218                 }
1219                 else
1220                         return NULL;
1221         }
1222
1223         sid_copy( psid, &group.sid );
1224
1225         DEBUG(10,("local_gid_to_sid:  gid (%d) -> SID %s.\n",
1226                 (unsigned int)gid, sid_string_static(psid)));
1227
1228         return psid;
1229 }
1230
1231 /****************************************************************************
1232  Convert a SID to gid - locally.
1233 ****************************************************************************/
1234
1235 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1236 {
1237         uint32 rid;
1238         GROUP_MAP group;
1239
1240         *name_type = SID_NAME_UNKNOWN;
1241
1242         /* This call can enumerate group mappings for foreign sids as well.
1243            So don't check for a match against our domain SID */
1244
1245         /* we don't need to disable winbindd since the gid is stored in
1246            the GROUP_MAP object */
1247
1248         if ( !pdb_getgrsid(&group, *psid) ) {
1249
1250                 /* fallback to rid mapping if enabled */
1251
1252                 if ( lp_enable_rid_algorithm() ) {
1253
1254                         if (!sid_check_is_in_our_domain(psid) ) {
1255                                 DEBUG(5,("local_sid_to_gid: RID algorithm only supported for our domain (%s is not)\n", sid_string_static(psid)));
1256                                 return False;
1257                         }
1258
1259                         if (!sid_peek_rid(psid, &rid)) {
1260                                 DEBUG(10,("local_sid_to_uid: invalid SID!\n"));
1261                                         return False;
1262                         }
1263
1264                         DEBUG(10,("local_sid_to_gid: Fall back to algorithmic mapping\n"));
1265
1266                         if (fallback_pdb_rid_is_user(rid)) {
1267                                 DEBUG(3, ("local_sid_to_gid: SID %s is *NOT* a group\n", sid_string_static(psid)));
1268                                 return False;
1269                         } else {
1270                                 *pgid = pdb_group_rid_to_gid(rid);
1271                                 DEBUG(10,("local_sid_to_gid: mapping: %s -> %u\n", sid_string_static(psid), (unsigned int)(*pgid)));
1272                                 return True;
1273                         }
1274                 }
1275
1276                 return False;
1277         }
1278
1279         *pgid = group.gid;
1280
1281         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u)\n", sid_string_static(psid),
1282                 (unsigned int)*pgid));
1283
1284         return True;
1285 }
1286
1287 /**********************************************************************
1288  Marshall/unmarshall SAM_ACCOUNT structs.
1289  *********************************************************************/
1290
1291 #define TDB_FORMAT_STRING       "ddddddBBBBBBBBBBBBddBBwdwdBwwd"
1292
1293 /**********************************************************************
1294  Intialize a SAM_ACCOUNT struct from a BYTE buffer of size len
1295  *********************************************************************/
1296
1297 BOOL init_sam_from_buffer(SAM_ACCOUNT *sampass, uint8 *buf, uint32 buflen)
1298 {
1299
1300         /* times are stored as 32bit integer
1301            take care on system with 64bit wide time_t
1302            --SSS */
1303         uint32  logon_time,
1304                 logoff_time,
1305                 kickoff_time,
1306                 pass_last_set_time,
1307                 pass_can_change_time,
1308                 pass_must_change_time;
1309         char *username;
1310         char *domain;
1311         char *nt_username;
1312         char *dir_drive;
1313         char *unknown_str;
1314         char *munged_dial;
1315         char *fullname;
1316         char *homedir;
1317         char *logon_script;
1318         char *profile_path;
1319         char *acct_desc;
1320         char *workstations;
1321         uint32  username_len, domain_len, nt_username_len,
1322                 dir_drive_len, unknown_str_len, munged_dial_len,
1323                 fullname_len, homedir_len, logon_script_len,
1324                 profile_path_len, acct_desc_len, workstations_len;
1325
1326         uint32  user_rid, group_rid, unknown_3, hours_len, unknown_6;
1327         uint16  acct_ctrl, logon_divs;
1328         uint16  bad_password_count, logon_count;
1329         uint8   *hours;
1330         static uint8    *lm_pw_ptr, *nt_pw_ptr;
1331         uint32          len = 0;
1332         uint32          lm_pw_len, nt_pw_len, hourslen;
1333         BOOL ret = True;
1334
1335         if(sampass == NULL || buf == NULL) {
1336                 DEBUG(0, ("init_sam_from_buffer: NULL parameters found!\n"));
1337                 return False;
1338         }
1339
1340         /* unpack the buffer into variables */
1341         len = tdb_unpack ((char *)buf, buflen, TDB_FORMAT_STRING,
1342                 &logon_time,
1343                 &logoff_time,
1344                 &kickoff_time,
1345                 &pass_last_set_time,
1346                 &pass_can_change_time,
1347                 &pass_must_change_time,
1348                 &username_len, &username,
1349                 &domain_len, &domain,
1350                 &nt_username_len, &nt_username,
1351                 &fullname_len, &fullname,
1352                 &homedir_len, &homedir,
1353                 &dir_drive_len, &dir_drive,
1354                 &logon_script_len, &logon_script,
1355                 &profile_path_len, &profile_path,
1356                 &acct_desc_len, &acct_desc,
1357                 &workstations_len, &workstations,
1358                 &unknown_str_len, &unknown_str,
1359                 &munged_dial_len, &munged_dial,
1360                 &user_rid,
1361                 &group_rid,
1362                 &lm_pw_len, &lm_pw_ptr,
1363                 &nt_pw_len, &nt_pw_ptr,
1364                 &acct_ctrl,
1365                 &unknown_3,
1366                 &logon_divs,
1367                 &hours_len,
1368                 &hourslen, &hours,
1369                 &bad_password_count,
1370                 &logon_count,
1371                 &unknown_6);
1372
1373         if (len == -1)  {
1374                 ret = False;
1375                 goto done;
1376         }
1377
1378         pdb_set_logon_time(sampass, logon_time, PDB_SET);
1379         pdb_set_logoff_time(sampass, logoff_time, PDB_SET);
1380         pdb_set_kickoff_time(sampass, kickoff_time, PDB_SET);
1381         pdb_set_pass_can_change_time(sampass, pass_can_change_time, PDB_SET);
1382         pdb_set_pass_must_change_time(sampass, pass_must_change_time, PDB_SET);
1383         pdb_set_pass_last_set_time(sampass, pass_last_set_time, PDB_SET);
1384
1385         pdb_set_username(sampass, username, PDB_SET);
1386         pdb_set_domain(sampass, domain, PDB_SET);
1387         pdb_set_nt_username(sampass, nt_username, PDB_SET);
1388         pdb_set_fullname(sampass, fullname, PDB_SET);
1389
1390         if (homedir) {
1391                 pdb_set_homedir(sampass, homedir, PDB_SET);
1392         }
1393         else {
1394                 pdb_set_homedir(sampass,
1395                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_home()),
1396                         PDB_DEFAULT);
1397         }
1398
1399         if (dir_drive)
1400                 pdb_set_dir_drive(sampass, dir_drive, PDB_SET);
1401         else {
1402                 pdb_set_dir_drive(sampass,
1403                         talloc_sub_basic(sampass->mem_ctx,  username, lp_logon_drive()),
1404                         PDB_DEFAULT);
1405         }
1406
1407         if (logon_script)
1408                 pdb_set_logon_script(sampass, logon_script, PDB_SET);
1409         else {
1410                 pdb_set_logon_script(sampass,
1411                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_script()),
1412                         PDB_DEFAULT);
1413         }
1414
1415         if (profile_path) {
1416                 pdb_set_profile_path(sampass, profile_path, PDB_SET);
1417         } else {
1418                 pdb_set_profile_path(sampass,
1419                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_path()),
1420                         PDB_DEFAULT);
1421         }
1422
1423         pdb_set_acct_desc(sampass, acct_desc, PDB_SET);
1424         pdb_set_workstations(sampass, workstations, PDB_SET);
1425         pdb_set_munged_dial(sampass, munged_dial, PDB_SET);
1426
1427         if (lm_pw_ptr && lm_pw_len == LM_HASH_LEN) {
1428                 if (!pdb_set_lanman_passwd(sampass, lm_pw_ptr, PDB_SET)) {
1429                         ret = False;
1430                         goto done;
1431                 }
1432         }
1433
1434         if (nt_pw_ptr && nt_pw_len == NT_HASH_LEN) {
1435                 if (!pdb_set_nt_passwd(sampass, nt_pw_ptr, PDB_SET)) {
1436                         ret = False;
1437                         goto done;
1438                 }
1439         }
1440
1441         pdb_set_user_sid_from_rid(sampass, user_rid, PDB_SET);
1442         pdb_set_group_sid_from_rid(sampass, group_rid, PDB_SET);
1443         pdb_set_unknown_3(sampass, unknown_3, PDB_SET);
1444         pdb_set_hours_len(sampass, hours_len, PDB_SET);
1445         pdb_set_bad_password_count(sampass, bad_password_count, PDB_SET);
1446         pdb_set_logon_count(sampass, logon_count, PDB_SET);
1447         pdb_set_unknown_6(sampass, unknown_6, PDB_SET);
1448         pdb_set_acct_ctrl(sampass, acct_ctrl, PDB_SET);
1449         pdb_set_logon_divs(sampass, logon_divs, PDB_SET);
1450         pdb_set_hours(sampass, hours, PDB_SET);
1451
1452 done:
1453
1454         SAFE_FREE(username);
1455         SAFE_FREE(domain);
1456         SAFE_FREE(nt_username);
1457         SAFE_FREE(fullname);
1458         SAFE_FREE(homedir);
1459         SAFE_FREE(dir_drive);
1460         SAFE_FREE(logon_script);
1461         SAFE_FREE(profile_path);
1462         SAFE_FREE(acct_desc);
1463         SAFE_FREE(workstations);
1464         SAFE_FREE(munged_dial);
1465         SAFE_FREE(unknown_str);
1466         SAFE_FREE(hours);
1467
1468         return ret;
1469 }
1470
1471 /**********************************************************************
1472  Intialize a BYTE buffer from a SAM_ACCOUNT struct
1473  *********************************************************************/
1474
1475 uint32 init_buffer_from_sam (uint8 **buf, const SAM_ACCOUNT *sampass, BOOL size_only)
1476 {
1477         size_t len, buflen;
1478
1479         /* times are stored as 32bit integer
1480            take care on system with 64bit wide time_t
1481            --SSS */
1482         uint32  logon_time,
1483                 logoff_time,
1484                 kickoff_time,
1485                 pass_last_set_time,
1486                 pass_can_change_time,
1487                 pass_must_change_time;
1488
1489         uint32  user_rid, group_rid;
1490
1491         const char *username;
1492         const char *domain;
1493         const char *nt_username;
1494         const char *dir_drive;
1495         const char *unknown_str;
1496         const char *munged_dial;
1497         const char *fullname;
1498         const char *homedir;
1499         const char *logon_script;
1500         const char *profile_path;
1501         const char *acct_desc;
1502         const char *workstations;
1503         uint32  username_len, domain_len, nt_username_len,
1504                 dir_drive_len, unknown_str_len, munged_dial_len,
1505                 fullname_len, homedir_len, logon_script_len,
1506                 profile_path_len, acct_desc_len, workstations_len;
1507
1508         const uint8 *lm_pw;
1509         const uint8 *nt_pw;
1510         uint32  lm_pw_len = 16;
1511         uint32  nt_pw_len = 16;
1512
1513         /* do we have a valid SAM_ACCOUNT pointer? */
1514         if (sampass == NULL) {
1515                 DEBUG(0, ("init_buffer_from_sam: SAM_ACCOUNT is NULL!\n"));
1516                 return -1;
1517         }
1518
1519         *buf = NULL;
1520         buflen = 0;
1521
1522         logon_time = (uint32)pdb_get_logon_time(sampass);
1523         logoff_time = (uint32)pdb_get_logoff_time(sampass);
1524         kickoff_time = (uint32)pdb_get_kickoff_time(sampass);
1525         pass_can_change_time = (uint32)pdb_get_pass_can_change_time(sampass);
1526         pass_must_change_time = (uint32)pdb_get_pass_must_change_time(sampass);
1527         pass_last_set_time = (uint32)pdb_get_pass_last_set_time(sampass);
1528
1529         user_rid = pdb_get_user_rid(sampass);
1530         group_rid = pdb_get_group_rid(sampass);
1531
1532         username = pdb_get_username(sampass);
1533         if (username)
1534                 username_len = strlen(username) +1;
1535         else
1536                 username_len = 0;
1537
1538         domain = pdb_get_domain(sampass);
1539         if (domain)
1540                 domain_len = strlen(domain) +1;
1541         else
1542                 domain_len = 0;
1543
1544         nt_username = pdb_get_nt_username(sampass);
1545         if (nt_username)
1546                 nt_username_len = strlen(nt_username) +1;
1547         else
1548                 nt_username_len = 0;
1549
1550         fullname = pdb_get_fullname(sampass);
1551         if (fullname)
1552                 fullname_len = strlen(fullname) +1;
1553         else
1554                 fullname_len = 0;
1555
1556         /*
1557          * Only updates fields which have been set (not defaults from smb.conf)
1558          */
1559
1560         if (!IS_SAM_DEFAULT(sampass, PDB_DRIVE))
1561                 dir_drive = pdb_get_dir_drive(sampass);
1562         else
1563                 dir_drive = NULL;
1564         if (dir_drive)
1565                 dir_drive_len = strlen(dir_drive) +1;
1566         else
1567                 dir_drive_len = 0;
1568
1569         if (!IS_SAM_DEFAULT(sampass, PDB_SMBHOME))
1570                 homedir = pdb_get_homedir(sampass);
1571         else
1572                 homedir = NULL;
1573         if (homedir)
1574                 homedir_len = strlen(homedir) +1;
1575         else
1576                 homedir_len = 0;
1577
1578         if (!IS_SAM_DEFAULT(sampass, PDB_LOGONSCRIPT))
1579                 logon_script = pdb_get_logon_script(sampass);
1580         else
1581                 logon_script = NULL;
1582         if (logon_script)
1583                 logon_script_len = strlen(logon_script) +1;
1584         else
1585                 logon_script_len = 0;
1586
1587         if (!IS_SAM_DEFAULT(sampass, PDB_PROFILE))
1588                 profile_path = pdb_get_profile_path(sampass);
1589         else
1590                 profile_path = NULL;
1591         if (profile_path)
1592                 profile_path_len = strlen(profile_path) +1;
1593         else
1594                 profile_path_len = 0;
1595
1596         lm_pw = pdb_get_lanman_passwd(sampass);
1597         if (!lm_pw)
1598                 lm_pw_len = 0;
1599
1600         nt_pw = pdb_get_nt_passwd(sampass);
1601         if (!nt_pw)
1602                 nt_pw_len = 0;
1603
1604         acct_desc = pdb_get_acct_desc(sampass);
1605         if (acct_desc)
1606                 acct_desc_len = strlen(acct_desc) +1;
1607         else
1608                 acct_desc_len = 0;
1609
1610         workstations = pdb_get_workstations(sampass);
1611         if (workstations)
1612                 workstations_len = strlen(workstations) +1;
1613         else
1614                 workstations_len = 0;
1615
1616         unknown_str = NULL;
1617         unknown_str_len = 0;
1618
1619         munged_dial = pdb_get_munged_dial(sampass);
1620         if (munged_dial)
1621                 munged_dial_len = strlen(munged_dial) +1;
1622         else
1623                 munged_dial_len = 0;
1624
1625         /* one time to get the size needed */
1626         len = tdb_pack(NULL, 0,  TDB_FORMAT_STRING,
1627                 logon_time,
1628                 logoff_time,
1629                 kickoff_time,
1630                 pass_last_set_time,
1631                 pass_can_change_time,
1632                 pass_must_change_time,
1633                 username_len, username,
1634                 domain_len, domain,
1635                 nt_username_len, nt_username,
1636                 fullname_len, fullname,
1637                 homedir_len, homedir,
1638                 dir_drive_len, dir_drive,
1639                 logon_script_len, logon_script,
1640                 profile_path_len, profile_path,
1641                 acct_desc_len, acct_desc,
1642                 workstations_len, workstations,
1643                 unknown_str_len, unknown_str,
1644                 munged_dial_len, munged_dial,
1645                 user_rid,
1646                 group_rid,
1647                 lm_pw_len, lm_pw,
1648                 nt_pw_len, nt_pw,
1649                 pdb_get_acct_ctrl(sampass),
1650                 pdb_get_unknown_3(sampass),
1651                 pdb_get_logon_divs(sampass),
1652                 pdb_get_hours_len(sampass),
1653                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1654                 pdb_get_bad_password_count(sampass),
1655                 pdb_get_logon_count(sampass),
1656                 pdb_get_unknown_6(sampass));
1657
1658
1659         if (size_only)
1660                 return buflen;
1661
1662         /* malloc the space needed */
1663         if ( (*buf=(uint8*)malloc(len)) == NULL) {
1664                 DEBUG(0,("init_buffer_from_sam: Unable to malloc() memory for buffer!\n"));
1665                 return (-1);
1666         }
1667
1668         /* now for the real call to tdb_pack() */
1669         buflen = tdb_pack((char *)*buf, len,  TDB_FORMAT_STRING,
1670                 logon_time,
1671                 logoff_time,
1672                 kickoff_time,
1673                 pass_last_set_time,
1674                 pass_can_change_time,
1675                 pass_must_change_time,
1676                 username_len, username,
1677                 domain_len, domain,
1678                 nt_username_len, nt_username,
1679                 fullname_len, fullname,
1680                 homedir_len, homedir,
1681                 dir_drive_len, dir_drive,
1682                 logon_script_len, logon_script,
1683                 profile_path_len, profile_path,
1684                 acct_desc_len, acct_desc,
1685                 workstations_len, workstations,
1686                 unknown_str_len, unknown_str,
1687                 munged_dial_len, munged_dial,
1688                 user_rid,
1689                 group_rid,
1690                 lm_pw_len, lm_pw,
1691                 nt_pw_len, nt_pw,
1692                 pdb_get_acct_ctrl(sampass),
1693                 pdb_get_unknown_3(sampass),
1694                 pdb_get_logon_divs(sampass),
1695                 pdb_get_hours_len(sampass),
1696                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1697                 pdb_get_bad_password_count(sampass),
1698                 pdb_get_logon_count(sampass),
1699                 pdb_get_unknown_6(sampass));
1700
1701
1702         /* check to make sure we got it correct */
1703         if (buflen != len) {
1704                 DEBUG(0, ("init_buffer_from_sam: somthing odd is going on here: bufflen (%lu) != len (%lu) in tdb_pack operations!\n",
1705                           (unsigned long)buflen, (unsigned long)len));
1706                 /* error */
1707                 SAFE_FREE (*buf);
1708                 return (-1);
1709         }
1710
1711         return (buflen);
1712 }
1713
1714
1715 /**********************************************************************
1716 **********************************************************************/
1717
1718 static BOOL get_free_ugid_range(uint32 *low, uint32 *high)
1719 {
1720         uid_t u_low, u_high;
1721         gid_t g_low, g_high;
1722
1723         if (!lp_idmap_uid(&u_low, &u_high) || !lp_idmap_gid(&g_low, &g_high)) {
1724                 return False;
1725         }
1726
1727         *low  = (u_low < g_low)   ? u_low  : g_low;
1728         *high = (u_high < g_high) ? u_high : g_high;
1729
1730         return True;
1731 }
1732
1733 /******************************************************************
1734  Get the the non-algorithmic RID range if idmap range are defined
1735 ******************************************************************/
1736
1737 BOOL get_free_rid_range(uint32 *low, uint32 *high)
1738 {
1739         uint32 id_low, id_high;
1740
1741         if (!lp_enable_rid_algorithm()) {
1742                 *low = BASE_RID;
1743                 *high = (uint32)-1;
1744         }
1745
1746         if (!get_free_ugid_range(&id_low, &id_high)) {
1747                 return False;
1748         }
1749
1750         *low = fallback_pdb_uid_to_user_rid(id_low);
1751         if (fallback_pdb_user_rid_to_uid((uint32)-1) < id_high) {
1752                 *high = (uint32)-1;
1753         } else {
1754                 *high = fallback_pdb_uid_to_user_rid(id_high);
1755         }
1756
1757         return True;
1758 }
1759
1760