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         BOOL ret;
 420
 421         if (!account_data || !pwd) {
 422                 return NT_STATUS_INVALID_PARAMETER;
 423         }
 424
 425         /* this is a hack this thing should not be set
 426            this way --SSS */
 427         if (!(guest_account && *guest_account)) {
 428                 DEBUG(1, ("NULL guest account!?!?\n"));
 429                 return NT_STATUS_UNSUCCESSFUL;
 430         } else {
 431                 /* Ensure this *must* be set right */
 432                 if (strcmp(pwd->pw_name, guest_account) == 0) {
 433                         if (!pdb_set_user_sid_from_rid(account_data, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) {
 434                                 return NT_STATUS_UNSUCCESSFUL;
 435                         }
 436                         if (!pdb_set_group_sid_from_rid(account_data, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) {
 437                                 return NT_STATUS_UNSUCCESSFUL;
 438                         }
 439                         return NT_STATUS_OK;
 440                 }
 441         }
 442
 443         if (!pdb_set_user_sid_from_rid(account_data, fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 444                 DEBUG(0,("Can't set User SID from RID!\n"));
 445                 return NT_STATUS_INVALID_PARAMETER;
 446         }
 447
 448         /* call the mapping code here */
 449         become_root();
 450         ret = pdb_getgrgid(&map, pwd->pw_gid);
 451         unbecome_root();
 452
 453         if( ret ) {
 454                 if (!pdb_set_group_sid(account_data, &map.sid, PDB_SET)){
 455                         DEBUG(0,("Can't set Group SID!\n"));
 456                         return NT_STATUS_INVALID_PARAMETER;
 457                 }
 458         }
 459         else {
 460                 if (!pdb_set_group_sid_from_rid(account_data, pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 461                         DEBUG(0,("Can't set Group SID\n"));
 462                         return NT_STATUS_INVALID_PARAMETER;
 463                 }
 464         }
 465
 466         return NT_STATUS_OK;
 467 }
 468
 469 /**********************************************************
 470  Encode the account control bits into a string.
 471  length = length of string to encode into (including terminating
 472  null). length *MUST BE MORE THAN 2* !
 473  **********************************************************/
 474
 475 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 476 {
 477         static fstring acct_str;
 478         size_t i = 0;
 479
 480         acct_str[i++] = '[';
 481
 482         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 483         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 484         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 485         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 486         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 487         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 488         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 489         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 490         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 491         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 492         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 493
 494         for ( ; i < length - 2 ; i++ )
 495                 acct_str[i] = ' ';
 496
 497         i = length - 2;
 498         acct_str[i++] = ']';
 499         acct_str[i++] = '\0';
 500
 501         return acct_str;
 502 }
 503
 504 /**********************************************************
 505  Decode the account control bits from a string.
 506  **********************************************************/
 507
 508 uint16 pdb_decode_acct_ctrl(const char *p)
 509 {
 510         uint16 acct_ctrl = 0;
 511         BOOL finished = False;
 512
 513         /*
 514          * Check if the account type bits have been encoded after the
 515          * NT password (in the form [NDHTUWSLXI]).
 516          */
 517
 518         if (*p != '[')
 519                 return 0;
 520
 521         for (p++; *p && !finished; p++) {
 522                 switch (*p) {
 523                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 524                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 525                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 526                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 527                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 528                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 529                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 530                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 531                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 532                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 533                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 534             case ' ': { break; }
 535                         case ':':
 536                         case '\n':
 537                         case '\0':
 538                         case ']':
 539                         default:  { finished = True; }
 540                 }
 541         }
 542
 543         return acct_ctrl;
 544 }
 545
 546 /*************************************************************
 547  Routine to set 32 hex password characters from a 16 byte array.
 548 **************************************************************/
 549
 550 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 551 {
 552         if (pwd != NULL) {
 553                 int i;
 554                 for (i = 0; i < 16; i++)
 555                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 556         } else {
 557                 if (acct_ctrl & ACB_PWNOTREQ)
 558                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 559                 else
 560                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 561         }
 562 }
 563
 564 /*************************************************************
 565  Routine to get the 32 hex characters and turn them
 566  into a 16 byte array.
 567 **************************************************************/
 568
 569 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 570 {
 571         int i;
 572         unsigned char   lonybble, hinybble;
 573         const char      *hexchars = "0123456789ABCDEF";
 574         char           *p1, *p2;
 575
 576         if (!p)
 577                 return (False);
 578
 579         for (i = 0; i < 32; i += 2) {
 580                 hinybble = toupper(p[i]);
 581                 lonybble = toupper(p[i + 1]);
 582
 583                 p1 = strchr(hexchars, hinybble);
 584                 p2 = strchr(hexchars, lonybble);
 585
 586                 if (!p1 || !p2)
 587                         return (False);
 588
 589                 hinybble = PTR_DIFF(p1, hexchars);
 590                 lonybble = PTR_DIFF(p2, hexchars);
 591
 592                 pwd[i / 2] = (hinybble << 4) | lonybble;
 593         }
 594         return (True);
 595 }
 596
 597 int algorithmic_rid_base(void)
 598 {
 599         static int rid_offset = 0;
 600
 601         if (rid_offset != 0)
 602                 return rid_offset;
 603
 604         rid_offset = lp_algorithmic_rid_base();
 605
 606         if (rid_offset < BASE_RID) {
 607                 /* Try to prevent admin foot-shooting, we can't put algorithmic
 608                    rids below 1000, that's the 'well known RIDs' on NT */
 609                 DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID));
 610                 rid_offset = BASE_RID;
 611         }
 612         if (rid_offset & 1) {
 613                 DEBUG(0, ("algorithmic rid base must be even\n"));
 614                 rid_offset += 1;
 615         }
 616         return rid_offset;
 617 }
 618
 619 /*******************************************************************
 620  Converts NT user RID to a UNIX uid.
 621  ********************************************************************/
 622
 623 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 624 {
 625         int rid_offset = algorithmic_rid_base();
 626         return (uid_t)(((user_rid & (~USER_RID_TYPE)) - rid_offset)/RID_MULTIPLIER);
 627 }
 628
 629 /*******************************************************************
 630  converts UNIX uid to an NT User RID.
 631  ********************************************************************/
 632
 633 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 634 {
 635         int rid_offset = algorithmic_rid_base();
 636         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 637 }
 638
 639 /*******************************************************************
 640  Converts NT group RID to a UNIX gid.
 641  ********************************************************************/
 642
 643 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 644 {
 645         int rid_offset = algorithmic_rid_base();
 646         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 647 }
 648
 649 /*******************************************************************
 650  converts NT Group RID to a UNIX uid.
 651
 652  warning: you must not call that function only
 653  you must do a call to the group mapping first.
 654  there is not anymore a direct link between the gid and the rid.
 655  ********************************************************************/
 656
 657 uint32 pdb_gid_to_group_rid(gid_t gid)
 658 {
 659         int rid_offset = algorithmic_rid_base();
 660         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 661 }
 662
 663 /*******************************************************************
 664  Decides if a RID is a well known RID.
 665  ********************************************************************/
 666
 667 static BOOL pdb_rid_is_well_known(uint32 rid)
 668 {
 669         /* Not using rid_offset here, because this is the actual
 670            NT fixed value (1000) */
 671
 672         return (rid < BASE_RID);
 673 }
 674
 675 /*******************************************************************
 676  Decides if a RID is a user or group RID.
 677  ********************************************************************/
 678
 679 BOOL fallback_pdb_rid_is_user(uint32 rid)
 680 {
 681   /* lkcl i understand that NT attaches an enumeration to a RID
 682    * such that it can be identified as either a user, group etc
 683    * type.  there are 5 such categories, and they are documented.
 684    */
 685         /* However, they are not in the RID, just somthing you can query
 686            seperatly.  Sorry luke :-) */
 687
 688    if(pdb_rid_is_well_known(rid)) {
 689       /*
 690        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 691        * and DOMAIN_USER_RID_GUEST.
 692        */
 693      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 694        return True;
 695    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 696      return True;
 697    }
 698    return False;
 699 }
 700
 701 /*******************************************************************
 702  Convert a rid into a name. Used in the lookup SID rpc.
 703  ********************************************************************/
 704
 705 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 706 {
 707         uint32 rid;
 708         SAM_ACCOUNT *sam_account = NULL;
 709         GROUP_MAP map;
 710         BOOL ret;
 711
 712         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 713                 DEBUG(0,("local_lookup_sid: sid_peek_check_rid return False! SID: %s\n",
 714                         sid_string_static(&map.sid)));
 715                 return False;
 716         }
 717         *psid_name_use = SID_NAME_UNKNOWN;
 718
 719         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 720
 721         if (rid == DOMAIN_USER_RID_ADMIN) {
 722                 const char **admin_list = lp_admin_users(-1);
 723                 *psid_name_use = SID_NAME_USER;
 724                 if (admin_list) {
 725                         const char *p = *admin_list;
 726                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 727                                 fstrcpy(name, "Administrator");
 728                 } else {
 729                         fstrcpy(name, "Administrator");
 730                 }
 731                 return True;
 732         }
 733
 734         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 735                 return False;
 736         }
 737
 738         /* see if the passdb can help us with the name of the user */
 739
 740         /* BEING ROOT BLLOCK */
 741         become_root();
 742         if (pdb_getsampwsid(sam_account, sid)) {
 743                 unbecome_root();                        /* -----> EXIT BECOME_ROOT() */
 744                 fstrcpy(name, pdb_get_username(sam_account));
 745                 *psid_name_use = SID_NAME_USER;
 746
 747                 pdb_free_sam(&sam_account);
 748
 749                 return True;
 750         }
 751         pdb_free_sam(&sam_account);
 752
 753         ret = pdb_getgrsid(&map, *sid);
 754         unbecome_root();
 755         /* END BECOME_ROOT BLOCK */
 756
 757         if ( ret ) {
 758                 if (map.gid!=(gid_t)-1) {
 759                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 760                 } else {
 761                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 762                 }
 763
 764                 fstrcpy(name, map.nt_name);
 765                 *psid_name_use = map.sid_name_use;
 766                 return True;
 767         }
 768
 769         if (fallback_pdb_rid_is_user(rid)) {
 770                 uid_t uid;
 771                 struct passwd *pw = NULL;
 772
 773                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 774
 775                 uid = fallback_pdb_user_rid_to_uid(rid);
 776                 pw = sys_getpwuid( uid );
 777
 778                 DEBUG(5,("local_lookup_sid: looking up uid %u %s\n", (unsigned int)uid,
 779                          pw ? "succeeded" : "failed" ));
 780
 781                 if ( !pw )
 782                         fstr_sprintf(name, "unix_user.%u", (unsigned int)uid);
 783                 else
 784                         fstrcpy( name, pw->pw_name );
 785
 786                 DEBUG(5,("local_lookup_sid: found user %s for rid %u\n", name,
 787                          (unsigned int)rid ));
 788
 789                 *psid_name_use = SID_NAME_USER;
 790
 791                 return ( pw != NULL );
 792         } else {
 793                 gid_t gid;
 794                 struct group *gr;
 795
 796                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 797
 798                 gid = pdb_group_rid_to_gid(rid);
 799                 gr = getgrgid(gid);
 800
 801                 *psid_name_use = SID_NAME_ALIAS;
 802
 803                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 804                          gr ? "succeeded" : "failed" ));
 805
 806                 if( !gr )
 807                         fstr_sprintf(name, "unix_group.%u", (unsigned int)gid);
 808                 else
 809                         fstrcpy( name, gr->gr_name);
 810
 811                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 812                          (unsigned int)rid ));
 813
 814                 /* assume fallback groups aer domain global groups */
 815
 816                 *psid_name_use = SID_NAME_DOM_GRP;
 817
 818                 return ( gr != NULL );
 819         }
 820 }
 821
 822 /*******************************************************************
 823  Convert a name into a SID. Used in the lookup name rpc.
 824  ********************************************************************/
 825
 826 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 827 {
 828         extern DOM_SID global_sid_World_Domain;
 829         DOM_SID local_sid;
 830         fstring user;
 831         SAM_ACCOUNT *sam_account = NULL;
 832         struct group *grp;
 833         GROUP_MAP map;
 834
 835         *psid_name_use = SID_NAME_UNKNOWN;
 836
 837         /*
 838          * user may be quoted a const string, and map_username and
 839          * friends can modify it. Make a modifiable copy. JRA.
 840          */
 841
 842         fstrcpy(user, c_user);
 843
 844         sid_copy(&local_sid, get_global_sam_sid());
 845
 846         /*
 847          * Special case for MACHINE\Everyone. Map to the world_sid.
 848          */
 849
 850         if(strequal(user, "Everyone")) {
 851                 sid_copy( psid, &global_sid_World_Domain);
 852                 sid_append_rid(psid, 0);
 853                 *psid_name_use = SID_NAME_ALIAS;
 854                 return True;
 855         }
 856
 857         (void)map_username(user);
 858
 859         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 860                 return False;
 861         }
 862
 863         /* BEGIN ROOT BLOCK */
 864
 865         become_root();
 866         if (pdb_getsampwnam(sam_account, user)) {
 867                 unbecome_root();
 868                 sid_copy(psid, pdb_get_user_sid(sam_account));
 869                 *psid_name_use = SID_NAME_USER;
 870
 871                 pdb_free_sam(&sam_account);
 872                 return True;
 873         }
 874
 875         pdb_free_sam(&sam_account);
 876
 877         /*
 878          * Maybe it was a group ?
 879          */
 880
 881         /* check if it's a mapped group */
 882         if (pdb_getgrnam(&map, user)) {
 883                 /* yes it's a mapped group */
 884                 sid_copy(&local_sid, &map.sid);
 885                 *psid_name_use = map.sid_name_use;
 886         } else {
 887                 /* it's not a mapped group */
 888                 grp = getgrnam(user);
 889                 if(!grp) {
 890                         unbecome_root();                /* ---> exit form block */
 891                         return False;
 892                 }
 893
 894                 /*
 895                  *check if it's mapped, if it is reply it doesn't exist
 896                  *
 897                  * that's to prevent this case:
 898                  *
 899                  * unix group ug is mapped to nt group ng
 900                  * someone does a lookup on ug
 901                  * we must not reply as it doesn't "exist" anymore
 902                  * for NT. For NT only ng exists.
 903                  * JFM, 30/11/2001
 904                  */
 905
 906                 if (pdb_getgrgid(&map, grp->gr_gid)){
 907                         unbecome_root();                /* ---> exit form block */
 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         unbecome_root();
 915         /* END ROOT BLOCK */
 916
 917         sid_copy( psid, &local_sid);
 918
 919         return True;
 920 }
 921
 922 /*************************************************************
 923  Change a password entry in the local smbpasswd file.
 924  *************************************************************/
 925
 926 BOOL local_password_change(const char *user_name, int local_flags,
 927                            const char *new_passwd,
 928                            char *err_str, size_t err_str_len,
 929                            char *msg_str, size_t msg_str_len)
 930 {
 931         SAM_ACCOUNT     *sam_pass=NULL;
 932         uint16 other_acb;
 933
 934         *err_str = '\0';
 935         *msg_str = '\0';
 936
 937         /* Get the smb passwd entry for this user */
 938         pdb_init_sam(&sam_pass);
 939
 940         become_root();
 941         if(!pdb_getsampwnam(sam_pass, user_name)) {
 942                 unbecome_root();
 943                 pdb_free_sam(&sam_pass);
 944
 945                 if ((local_flags & LOCAL_ADD_USER) || (local_flags & LOCAL_DELETE_USER)) {
 946                         /* Might not exist in /etc/passwd.  Use rid algorithm here */
 947                         if (!NT_STATUS_IS_OK(pdb_init_sam_new(&sam_pass, user_name, 0))) {
 948                                 slprintf(err_str, err_str_len-1, "Failed to initialise SAM_ACCOUNT for user %s.\n", user_name);
 949                                 return False;
 950                         }
 951                 } else {
 952                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
 953                         return False;
 954                 }
 955         } else {
 956                 unbecome_root();
 957                 /* the entry already existed */
 958                 local_flags &= ~LOCAL_ADD_USER;
 959         }
 960
 961         /* the 'other' acb bits not being changed here */
 962         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
 963         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 964                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
 965                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
 966                         pdb_free_sam(&sam_pass);
 967                         return False;
 968                 }
 969         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 970                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
 971                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
 972                         pdb_free_sam(&sam_pass);
 973                         return False;
 974                 }
 975         } else {
 976                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
 977                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
 978                         pdb_free_sam(&sam_pass);
 979                         return False;
 980                 }
 981         }
 982
 983         /*
 984          * We are root - just write the new password
 985          * and the valid last change time.
 986          */
 987
 988         if (local_flags & LOCAL_DISABLE_USER) {
 989                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
 990                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
 991                         pdb_free_sam(&sam_pass);
 992                         return False;
 993                 }
 994         } else if (local_flags & LOCAL_ENABLE_USER) {
 995                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 996                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 997                         pdb_free_sam(&sam_pass);
 998                         return False;
 999                 }
1000         }
1001
1002         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1003                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
1004                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1005                         pdb_free_sam(&sam_pass);
1006                         return False;
1007                 }
1008         } else if (local_flags & LOCAL_SET_PASSWORD) {
1009                 /*
1010                  * If we're dealing with setting a completely empty user account
1011                  * ie. One with a password of 'XXXX', but not set disabled (like
1012                  * an account created from scratch) then if the old password was
1013                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1014                  * We remove that as we're giving this user their first password
1015                  * and the decision hasn't really been made to disable them (ie.
1016                  * don't create them disabled). JRA.
1017                  */
1018                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1019                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1020                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1021                                 pdb_free_sam(&sam_pass);
1022                                 return False;
1023                         }
1024                 }
1025                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
1026                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1027                         pdb_free_sam(&sam_pass);
1028                         return False;
1029                 }
1030
1031                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1032                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1033                         pdb_free_sam(&sam_pass);
1034                         return False;
1035                 }
1036         }
1037
1038         if (local_flags & LOCAL_ADD_USER) {
1039                 if (pdb_add_sam_account(sam_pass)) {
1040                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1041                         pdb_free_sam(&sam_pass);
1042                         return True;
1043                 } else {
1044                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1045                         pdb_free_sam(&sam_pass);
1046                         return False;
1047                 }
1048         } else if (local_flags & LOCAL_DELETE_USER) {
1049                 if (!pdb_delete_sam_account(sam_pass)) {
1050                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1051                         pdb_free_sam(&sam_pass);
1052                         return False;
1053                 }
1054                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1055         } else {
1056                 if(!pdb_update_sam_account(sam_pass)) {
1057                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1058                         pdb_free_sam(&sam_pass);
1059                         return False;
1060                 }
1061                 if(local_flags & LOCAL_DISABLE_USER)
1062                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1063                 else if (local_flags & LOCAL_ENABLE_USER)
1064                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1065                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1066                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1067         }
1068
1069         pdb_free_sam(&sam_pass);
1070         return True;
1071 }
1072
1073 /****************************************************************************
1074  Convert a uid to SID - algorithmic.
1075 ****************************************************************************/
1076
1077 static DOM_SID *algorithmic_uid_to_sid(DOM_SID *psid, uid_t uid)
1078 {
1079         if ( !lp_enable_rid_algorithm() )
1080                 return NULL;
1081
1082         DEBUG(8,("algorithmic_uid_to_sid: falling back to RID algorithm\n"));
1083         sid_copy( psid, get_global_sam_sid() );
1084         sid_append_rid( psid, fallback_pdb_uid_to_user_rid(uid) );
1085         DEBUG(10,("algorithmic_uid_to_sid:  uid (%d) -> SID %s.\n",
1086                 (unsigned int)uid, sid_string_static(psid) ));
1087
1088         return psid;
1089 }
1090
1091 /****************************************************************************
1092  Convert a uid to SID - locally.
1093 ****************************************************************************/
1094
1095 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
1096 {
1097         SAM_ACCOUNT *sampw = NULL;
1098         struct passwd *unix_pw;
1099         BOOL ret;
1100
1101         unix_pw = sys_getpwuid( uid );
1102
1103         if ( !unix_pw ) {
1104                 DEBUG(4,("local_uid_to_sid: host has no idea of uid %lu\n", (unsigned long)uid));
1105                 return algorithmic_uid_to_sid( psid, uid);
1106         }
1107
1108         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1109                 DEBUG(0,("local_uid_to_sid: failed to allocate SAM_ACCOUNT object\n"));
1110                 return NULL;
1111         }
1112
1113         become_root();
1114         ret = pdb_getsampwnam( sampw, unix_pw->pw_name );
1115         unbecome_root();
1116
1117         if ( ret )
1118                 sid_copy( psid, pdb_get_user_sid(sampw) );
1119         else {
1120                 DEBUG(4,("local_uid_to_sid: User %s [uid == %lu] has no samba account\n",
1121                         unix_pw->pw_name, (unsigned long)uid));
1122
1123                 return algorithmic_uid_to_sid( psid, uid);
1124         }
1125
1126         DEBUG(10,("local_uid_to_sid:  uid (%d) -> SID %s (%s).\n",
1127                 (unsigned int)uid, sid_string_static(psid), unix_pw->pw_name));
1128
1129         return psid;
1130 }
1131
1132 /****************************************************************************
1133  Convert a SID to uid - locally.
1134 ****************************************************************************/
1135
1136 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1137 {
1138         SAM_ACCOUNT *sampw = NULL;
1139         struct passwd *unix_pw;
1140         const char *user_name;
1141
1142         *name_type = SID_NAME_UNKNOWN;
1143
1144         /*
1145          * We can only convert to a uid if this is our local
1146          * Domain SID (ie. we are the controling authority).
1147          */
1148         if (!sid_check_is_in_our_domain(psid) ) {
1149                 DEBUG(5,("local_sid_to_uid: this SID (%s) is not from our domain\n", sid_string_static(psid)));
1150                 return False;
1151         }
1152
1153         /* lookup the user account */
1154
1155         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1156                 DEBUG(0,("local_sid_to_uid: Failed to allocate memory for SAM_ACCOUNT object\n"));
1157                 return False;
1158         }
1159
1160         become_root();
1161         if ( !pdb_getsampwsid(sampw, psid) ) {
1162                 unbecome_root();
1163                 DEBUG(8,("local_sid_to_uid: Could not find SID %s in passdb\n",
1164                         sid_string_static(psid)));
1165                 return False;
1166         }
1167         unbecome_root();
1168
1169         user_name = pdb_get_username(sampw);
1170
1171         unix_pw = sys_getpwnam( user_name );
1172
1173         if ( !unix_pw ) {
1174                 DEBUG(0,("local_sid_to_uid: %s found in passdb but getpwnam() return NULL!\n",
1175                         user_name));
1176                 pdb_free_sam( &sampw );
1177                 return False;
1178         }
1179
1180         *puid = unix_pw->pw_uid;
1181
1182         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_string_static(psid),
1183                 (unsigned int)*puid, user_name ));
1184
1185         *name_type = SID_NAME_USER;
1186
1187         return True;
1188 }
1189
1190 /****************************************************************************
1191  Convert a gid to SID - locally.
1192 ****************************************************************************/
1193
1194 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
1195 {
1196         GROUP_MAP group;
1197         BOOL ret;
1198
1199         /* we don't need to disable winbindd since the gid is stored in
1200            the GROUP_MAP object */
1201
1202         /* done as root since ldap backend requires root to open a connection */
1203
1204         become_root();
1205         ret = pdb_getgrgid( &group, gid );
1206         unbecome_root();
1207
1208         if ( !ret ) {
1209
1210                 /* fallback to rid mapping if enabled */
1211
1212                 if ( lp_enable_rid_algorithm() ) {
1213                         sid_copy(psid, get_global_sam_sid());
1214                         sid_append_rid(psid, pdb_gid_to_group_rid(gid));
1215
1216                         DEBUG(10,("local_gid_to_sid: Fall back to algorithmic mapping: %u -> %s\n",
1217                                 (unsigned int)gid, sid_string_static(psid)));
1218
1219                         return psid;
1220                 }
1221                 else
1222                         return NULL;
1223         }
1224
1225         sid_copy( psid, &group.sid );
1226
1227         DEBUG(10,("local_gid_to_sid:  gid (%d) -> SID %s.\n",
1228                 (unsigned int)gid, sid_string_static(psid)));
1229
1230         return psid;
1231 }
1232
1233 /****************************************************************************
1234  Convert a SID to gid - locally.
1235 ****************************************************************************/
1236
1237 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1238 {
1239         uint32 rid;
1240         GROUP_MAP group;
1241         BOOL ret;
1242
1243         *name_type = SID_NAME_UNKNOWN;
1244
1245         /* This call can enumerate group mappings for foreign sids as well.
1246            So don't check for a match against our domain SID */
1247
1248         /* we don't need to disable winbindd since the gid is stored in
1249            the GROUP_MAP object */
1250
1251         become_root();
1252         ret = pdb_getgrsid(&group, *psid);
1253         unbecome_root();
1254
1255         if ( !ret ) {
1256
1257                 /* fallback to rid mapping if enabled */
1258
1259                 if ( lp_enable_rid_algorithm() ) {
1260
1261                         if (!sid_check_is_in_our_domain(psid) ) {
1262                                 DEBUG(5,("local_sid_to_gid: RID algorithm only supported for our domain (%s is not)\n", sid_string_static(psid)));
1263                                 return False;
1264                         }
1265
1266                         if (!sid_peek_rid(psid, &rid)) {
1267                                 DEBUG(10,("local_sid_to_uid: invalid SID!\n"));
1268                                         return False;
1269                         }
1270
1271                         DEBUG(10,("local_sid_to_gid: Fall back to algorithmic mapping\n"));
1272
1273                         if (fallback_pdb_rid_is_user(rid)) {
1274                                 DEBUG(3, ("local_sid_to_gid: SID %s is *NOT* a group\n", sid_string_static(psid)));
1275                                 return False;
1276                         } else {
1277                                 *pgid = pdb_group_rid_to_gid(rid);
1278                                 DEBUG(10,("local_sid_to_gid: mapping: %s -> %u\n", sid_string_static(psid), (unsigned int)(*pgid)));
1279                                 return True;
1280                         }
1281                 }
1282
1283                 return False;
1284         }
1285
1286         *pgid = group.gid;
1287
1288         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u)\n", sid_string_static(psid),
1289                 (unsigned int)*pgid));
1290
1291         return True;
1292 }
1293
1294 /**********************************************************************
1295  Marshall/unmarshall SAM_ACCOUNT structs.
1296  *********************************************************************/
1297
1298 #define TDB_FORMAT_STRING       "ddddddBBBBBBBBBBBBddBBwdwdBwwd"
1299
1300 /**********************************************************************
1301  Intialize a SAM_ACCOUNT struct from a BYTE buffer of size len
1302  *********************************************************************/
1303
1304 BOOL init_sam_from_buffer(SAM_ACCOUNT *sampass, uint8 *buf, uint32 buflen)
1305 {
1306
1307         /* times are stored as 32bit integer
1308            take care on system with 64bit wide time_t
1309            --SSS */
1310         uint32  logon_time,
1311                 logoff_time,
1312                 kickoff_time,
1313                 pass_last_set_time,
1314                 pass_can_change_time,
1315                 pass_must_change_time;
1316         char *username;
1317         char *domain;
1318         char *nt_username;
1319         char *dir_drive;
1320         char *unknown_str;
1321         char *munged_dial;
1322         char *fullname;
1323         char *homedir;
1324         char *logon_script;
1325         char *profile_path;
1326         char *acct_desc;
1327         char *workstations;
1328         uint32  username_len, domain_len, nt_username_len,
1329                 dir_drive_len, unknown_str_len, munged_dial_len,
1330                 fullname_len, homedir_len, logon_script_len,
1331                 profile_path_len, acct_desc_len, workstations_len;
1332
1333         uint32  user_rid, group_rid, unknown_3, hours_len, unknown_6;
1334         uint16  acct_ctrl, logon_divs;
1335         uint16  bad_password_count, logon_count;
1336         uint8   *hours;
1337         static uint8    *lm_pw_ptr, *nt_pw_ptr;
1338         uint32          len = 0;
1339         uint32          lm_pw_len, nt_pw_len, hourslen;
1340         BOOL ret = True;
1341
1342         if(sampass == NULL || buf == NULL) {
1343                 DEBUG(0, ("init_sam_from_buffer: NULL parameters found!\n"));
1344                 return False;
1345         }
1346
1347         /* unpack the buffer into variables */
1348         len = tdb_unpack ((char *)buf, buflen, TDB_FORMAT_STRING,
1349                 &logon_time,
1350                 &logoff_time,
1351                 &kickoff_time,
1352                 &pass_last_set_time,
1353                 &pass_can_change_time,
1354                 &pass_must_change_time,
1355                 &username_len, &username,
1356                 &domain_len, &domain,
1357                 &nt_username_len, &nt_username,
1358                 &fullname_len, &fullname,
1359                 &homedir_len, &homedir,
1360                 &dir_drive_len, &dir_drive,
1361                 &logon_script_len, &logon_script,
1362                 &profile_path_len, &profile_path,
1363                 &acct_desc_len, &acct_desc,
1364                 &workstations_len, &workstations,
1365                 &unknown_str_len, &unknown_str,
1366                 &munged_dial_len, &munged_dial,
1367                 &user_rid,
1368                 &group_rid,
1369                 &lm_pw_len, &lm_pw_ptr,
1370                 &nt_pw_len, &nt_pw_ptr,
1371                 &acct_ctrl,
1372                 &unknown_3,
1373                 &logon_divs,
1374                 &hours_len,
1375                 &hourslen, &hours,
1376                 &bad_password_count,
1377                 &logon_count,
1378                 &unknown_6);
1379
1380         if (len == -1)  {
1381                 ret = False;
1382                 goto done;
1383         }
1384
1385         pdb_set_logon_time(sampass, logon_time, PDB_SET);
1386         pdb_set_logoff_time(sampass, logoff_time, PDB_SET);
1387         pdb_set_kickoff_time(sampass, kickoff_time, PDB_SET);
1388         pdb_set_pass_can_change_time(sampass, pass_can_change_time, PDB_SET);
1389         pdb_set_pass_must_change_time(sampass, pass_must_change_time, PDB_SET);
1390         pdb_set_pass_last_set_time(sampass, pass_last_set_time, PDB_SET);
1391
1392         pdb_set_username(sampass, username, PDB_SET);
1393         pdb_set_domain(sampass, domain, PDB_SET);
1394         pdb_set_nt_username(sampass, nt_username, PDB_SET);
1395         pdb_set_fullname(sampass, fullname, PDB_SET);
1396
1397         if (homedir) {
1398                 pdb_set_homedir(sampass, homedir, PDB_SET);
1399         }
1400         else {
1401                 pdb_set_homedir(sampass,
1402                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_home()),
1403                         PDB_DEFAULT);
1404         }
1405
1406         if (dir_drive)
1407                 pdb_set_dir_drive(sampass, dir_drive, PDB_SET);
1408         else {
1409                 pdb_set_dir_drive(sampass,
1410                         talloc_sub_basic(sampass->mem_ctx,  username, lp_logon_drive()),
1411                         PDB_DEFAULT);
1412         }
1413
1414         if (logon_script)
1415                 pdb_set_logon_script(sampass, logon_script, PDB_SET);
1416         else {
1417                 pdb_set_logon_script(sampass,
1418                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_script()),
1419                         PDB_DEFAULT);
1420         }
1421
1422         if (profile_path) {
1423                 pdb_set_profile_path(sampass, profile_path, PDB_SET);
1424         } else {
1425                 pdb_set_profile_path(sampass,
1426                         talloc_sub_basic(sampass->mem_ctx, username, lp_logon_path()),
1427                         PDB_DEFAULT);
1428         }
1429
1430         pdb_set_acct_desc(sampass, acct_desc, PDB_SET);
1431         pdb_set_workstations(sampass, workstations, PDB_SET);
1432         pdb_set_munged_dial(sampass, munged_dial, PDB_SET);
1433
1434         if (lm_pw_ptr && lm_pw_len == LM_HASH_LEN) {
1435                 if (!pdb_set_lanman_passwd(sampass, lm_pw_ptr, PDB_SET)) {
1436                         ret = False;
1437                         goto done;
1438                 }
1439         }
1440
1441         if (nt_pw_ptr && nt_pw_len == NT_HASH_LEN) {
1442                 if (!pdb_set_nt_passwd(sampass, nt_pw_ptr, PDB_SET)) {
1443                         ret = False;
1444                         goto done;
1445                 }
1446         }
1447
1448         pdb_set_user_sid_from_rid(sampass, user_rid, PDB_SET);
1449         pdb_set_group_sid_from_rid(sampass, group_rid, PDB_SET);
1450         pdb_set_unknown_3(sampass, unknown_3, PDB_SET);
1451         pdb_set_hours_len(sampass, hours_len, PDB_SET);
1452         pdb_set_bad_password_count(sampass, bad_password_count, PDB_SET);
1453         pdb_set_logon_count(sampass, logon_count, PDB_SET);
1454         pdb_set_unknown_6(sampass, unknown_6, PDB_SET);
1455         pdb_set_acct_ctrl(sampass, acct_ctrl, PDB_SET);
1456         pdb_set_logon_divs(sampass, logon_divs, PDB_SET);
1457         pdb_set_hours(sampass, hours, PDB_SET);
1458
1459 done:
1460
1461         SAFE_FREE(username);
1462         SAFE_FREE(domain);
1463         SAFE_FREE(nt_username);
1464         SAFE_FREE(fullname);
1465         SAFE_FREE(homedir);
1466         SAFE_FREE(dir_drive);
1467         SAFE_FREE(logon_script);
1468         SAFE_FREE(profile_path);
1469         SAFE_FREE(acct_desc);
1470         SAFE_FREE(workstations);
1471         SAFE_FREE(munged_dial);
1472         SAFE_FREE(unknown_str);
1473         SAFE_FREE(hours);
1474
1475         return ret;
1476 }
1477
1478 /**********************************************************************
1479  Intialize a BYTE buffer from a SAM_ACCOUNT struct
1480  *********************************************************************/
1481
1482 uint32 init_buffer_from_sam (uint8 **buf, const SAM_ACCOUNT *sampass, BOOL size_only)
1483 {
1484         size_t len, buflen;
1485
1486         /* times are stored as 32bit integer
1487            take care on system with 64bit wide time_t
1488            --SSS */
1489         uint32  logon_time,
1490                 logoff_time,
1491                 kickoff_time,
1492                 pass_last_set_time,
1493                 pass_can_change_time,
1494                 pass_must_change_time;
1495
1496         uint32  user_rid, group_rid;
1497
1498         const char *username;
1499         const char *domain;
1500         const char *nt_username;
1501         const char *dir_drive;
1502         const char *unknown_str;
1503         const char *munged_dial;
1504         const char *fullname;
1505         const char *homedir;
1506         const char *logon_script;
1507         const char *profile_path;
1508         const char *acct_desc;
1509         const char *workstations;
1510         uint32  username_len, domain_len, nt_username_len,
1511                 dir_drive_len, unknown_str_len, munged_dial_len,
1512                 fullname_len, homedir_len, logon_script_len,
1513                 profile_path_len, acct_desc_len, workstations_len;
1514
1515         const uint8 *lm_pw;
1516         const uint8 *nt_pw;
1517         uint32  lm_pw_len = 16;
1518         uint32  nt_pw_len = 16;
1519
1520         /* do we have a valid SAM_ACCOUNT pointer? */
1521         if (sampass == NULL) {
1522                 DEBUG(0, ("init_buffer_from_sam: SAM_ACCOUNT is NULL!\n"));
1523                 return -1;
1524         }
1525
1526         *buf = NULL;
1527         buflen = 0;
1528
1529         logon_time = (uint32)pdb_get_logon_time(sampass);
1530         logoff_time = (uint32)pdb_get_logoff_time(sampass);
1531         kickoff_time = (uint32)pdb_get_kickoff_time(sampass);
1532         pass_can_change_time = (uint32)pdb_get_pass_can_change_time(sampass);
1533         pass_must_change_time = (uint32)pdb_get_pass_must_change_time(sampass);
1534         pass_last_set_time = (uint32)pdb_get_pass_last_set_time(sampass);
1535
1536         user_rid = pdb_get_user_rid(sampass);
1537         group_rid = pdb_get_group_rid(sampass);
1538
1539         username = pdb_get_username(sampass);
1540         if (username)
1541                 username_len = strlen(username) +1;
1542         else
1543                 username_len = 0;
1544
1545         domain = pdb_get_domain(sampass);
1546         if (domain)
1547                 domain_len = strlen(domain) +1;
1548         else
1549                 domain_len = 0;
1550
1551         nt_username = pdb_get_nt_username(sampass);
1552         if (nt_username)
1553                 nt_username_len = strlen(nt_username) +1;
1554         else
1555                 nt_username_len = 0;
1556
1557         fullname = pdb_get_fullname(sampass);
1558         if (fullname)
1559                 fullname_len = strlen(fullname) +1;
1560         else
1561                 fullname_len = 0;
1562
1563         /*
1564          * Only updates fields which have been set (not defaults from smb.conf)
1565          */
1566
1567         if (!IS_SAM_DEFAULT(sampass, PDB_DRIVE))
1568                 dir_drive = pdb_get_dir_drive(sampass);
1569         else
1570                 dir_drive = NULL;
1571         if (dir_drive)
1572                 dir_drive_len = strlen(dir_drive) +1;
1573         else
1574                 dir_drive_len = 0;
1575
1576         if (!IS_SAM_DEFAULT(sampass, PDB_SMBHOME))
1577                 homedir = pdb_get_homedir(sampass);
1578         else
1579                 homedir = NULL;
1580         if (homedir)
1581                 homedir_len = strlen(homedir) +1;
1582         else
1583                 homedir_len = 0;
1584
1585         if (!IS_SAM_DEFAULT(sampass, PDB_LOGONSCRIPT))
1586                 logon_script = pdb_get_logon_script(sampass);
1587         else
1588                 logon_script = NULL;
1589         if (logon_script)
1590                 logon_script_len = strlen(logon_script) +1;
1591         else
1592                 logon_script_len = 0;
1593
1594         if (!IS_SAM_DEFAULT(sampass, PDB_PROFILE))
1595                 profile_path = pdb_get_profile_path(sampass);
1596         else
1597                 profile_path = NULL;
1598         if (profile_path)
1599                 profile_path_len = strlen(profile_path) +1;
1600         else
1601                 profile_path_len = 0;
1602
1603         lm_pw = pdb_get_lanman_passwd(sampass);
1604         if (!lm_pw)
1605                 lm_pw_len = 0;
1606
1607         nt_pw = pdb_get_nt_passwd(sampass);
1608         if (!nt_pw)
1609                 nt_pw_len = 0;
1610
1611         acct_desc = pdb_get_acct_desc(sampass);
1612         if (acct_desc)
1613                 acct_desc_len = strlen(acct_desc) +1;
1614         else
1615                 acct_desc_len = 0;
1616
1617         workstations = pdb_get_workstations(sampass);
1618         if (workstations)
1619                 workstations_len = strlen(workstations) +1;
1620         else
1621                 workstations_len = 0;
1622
1623         unknown_str = NULL;
1624         unknown_str_len = 0;
1625
1626         munged_dial = pdb_get_munged_dial(sampass);
1627         if (munged_dial)
1628                 munged_dial_len = strlen(munged_dial) +1;
1629         else
1630                 munged_dial_len = 0;
1631
1632         /* one time to get the size needed */
1633         len = tdb_pack(NULL, 0,  TDB_FORMAT_STRING,
1634                 logon_time,
1635                 logoff_time,
1636                 kickoff_time,
1637                 pass_last_set_time,
1638                 pass_can_change_time,
1639                 pass_must_change_time,
1640                 username_len, username,
1641                 domain_len, domain,
1642                 nt_username_len, nt_username,
1643                 fullname_len, fullname,
1644                 homedir_len, homedir,
1645                 dir_drive_len, dir_drive,
1646                 logon_script_len, logon_script,
1647                 profile_path_len, profile_path,
1648                 acct_desc_len, acct_desc,
1649                 workstations_len, workstations,
1650                 unknown_str_len, unknown_str,
1651                 munged_dial_len, munged_dial,
1652                 user_rid,
1653                 group_rid,
1654                 lm_pw_len, lm_pw,
1655                 nt_pw_len, nt_pw,
1656                 pdb_get_acct_ctrl(sampass),
1657                 pdb_get_unknown_3(sampass),
1658                 pdb_get_logon_divs(sampass),
1659                 pdb_get_hours_len(sampass),
1660                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1661                 pdb_get_bad_password_count(sampass),
1662                 pdb_get_logon_count(sampass),
1663                 pdb_get_unknown_6(sampass));
1664
1665
1666         if (size_only)
1667                 return buflen;
1668
1669         /* malloc the space needed */
1670         if ( (*buf=(uint8*)malloc(len)) == NULL) {
1671                 DEBUG(0,("init_buffer_from_sam: Unable to malloc() memory for buffer!\n"));
1672                 return (-1);
1673         }
1674
1675         /* now for the real call to tdb_pack() */
1676         buflen = tdb_pack((char *)*buf, len,  TDB_FORMAT_STRING,
1677                 logon_time,
1678                 logoff_time,
1679                 kickoff_time,
1680                 pass_last_set_time,
1681                 pass_can_change_time,
1682                 pass_must_change_time,
1683                 username_len, username,
1684                 domain_len, domain,
1685                 nt_username_len, nt_username,
1686                 fullname_len, fullname,
1687                 homedir_len, homedir,
1688                 dir_drive_len, dir_drive,
1689                 logon_script_len, logon_script,
1690                 profile_path_len, profile_path,
1691                 acct_desc_len, acct_desc,
1692                 workstations_len, workstations,
1693                 unknown_str_len, unknown_str,
1694                 munged_dial_len, munged_dial,
1695                 user_rid,
1696                 group_rid,
1697                 lm_pw_len, lm_pw,
1698                 nt_pw_len, nt_pw,
1699                 pdb_get_acct_ctrl(sampass),
1700                 pdb_get_unknown_3(sampass),
1701                 pdb_get_logon_divs(sampass),
1702                 pdb_get_hours_len(sampass),
1703                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1704                 pdb_get_bad_password_count(sampass),
1705                 pdb_get_logon_count(sampass),
1706                 pdb_get_unknown_6(sampass));
1707
1708
1709         /* check to make sure we got it correct */
1710         if (buflen != len) {
1711                 DEBUG(0, ("init_buffer_from_sam: somthing odd is going on here: bufflen (%lu) != len (%lu) in tdb_pack operations!\n",
1712                           (unsigned long)buflen, (unsigned long)len));
1713                 /* error */
1714                 SAFE_FREE (*buf);
1715                 return (-1);
1716         }
1717
1718         return (buflen);
1719 }
1720
1721
1722 /**********************************************************************
1723 **********************************************************************/
1724
1725 static BOOL get_free_ugid_range(uint32 *low, uint32 *high)
1726 {
1727         uid_t u_low, u_high;
1728         gid_t g_low, g_high;
1729
1730         if (!lp_idmap_uid(&u_low, &u_high) || !lp_idmap_gid(&g_low, &g_high)) {
1731                 return False;
1732         }
1733
1734         *low  = (u_low < g_low)   ? u_low  : g_low;
1735         *high = (u_high < g_high) ? u_high : g_high;
1736
1737         return True;
1738 }
1739
1740 /******************************************************************
1741  Get the the non-algorithmic RID range if idmap range are defined
1742 ******************************************************************/
1743
1744 BOOL get_free_rid_range(uint32 *low, uint32 *high)
1745 {
1746         uint32 id_low, id_high;
1747
1748         if (!lp_enable_rid_algorithm()) {
1749                 *low = BASE_RID;
1750                 *high = (uint32)-1;
1751         }
1752
1753         if (!get_free_ugid_range(&id_low, &id_high)) {
1754                 return False;
1755         }
1756
1757         *low = fallback_pdb_uid_to_user_rid(id_low);
1758         if (fallback_pdb_user_rid_to_uid((uint32)-1) < id_high) {
1759                 *high = (uint32)-1;
1760         } else {
1761                 *high = fallback_pdb_uid_to_user_rid(id_high);
1762         }
1763
1764         return True;
1765 }
1766
1767