source/passdb/passdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Jeremy Allison                 1996-2001
   5    Copyright (C) Luke Kenneth Casson Leighton   1996-1998
   6    Copyright (C) Gerald (Jerry) Carter          2000-2001
   7    Copyright (C) Andrew Bartlett                2001-2002
   8    Copyright (C) Simo Sorce                     2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_PASSDB
  29
  30 /******************************************************************
  31  get the default domain/netbios name to be used when
  32  testing authentication.  For example, if you connect
  33  to a Windows member server using a bogus domain name, the
  34  Windows box will map the BOGUS\user to DOMAIN\user.  A
  35  standalone box will map to WKS\user.
  36 ******************************************************************/
  37
  38 const char *get_default_sam_name(void)
  39 {
  40         /* standalone servers can only use the local netbios name */
  41         if ( lp_server_role() == ROLE_STANDALONE )
  42                 return global_myname();
  43
  44         /* Windows domain members default to the DOMAIN
  45            name when not specified */
  46         return lp_workgroup();
  47 }
  48
  49 /******************************************************************
  50  get the default domain/netbios name to be used when dealing
  51  with our passdb list of accounts
  52 ******************************************************************/
  53
  54 const char *get_global_sam_name(void)
  55 {
  56         if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
  57                 return lp_workgroup();
  58         }
  59         return global_myname();
  60 }
  61
  62 /************************************************************
  63  Fill the SAM_ACCOUNT with default values.
  64  ***********************************************************/
  65
  66 void pdb_fill_default_sam(SAM_ACCOUNT *user)
  67 {
  68         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  69
  70         /* no initial methods */
  71         user->methods = NULL;
  72
  73         /* Don't change these timestamp settings without a good reason.
  74            They are important for NT member server compatibility. */
  75
  76         user->private.logon_time            = (time_t)0;
  77         user->private.pass_last_set_time    = (time_t)0;
  78         user->private.pass_can_change_time  = (time_t)0;
  79         user->private.logoff_time           =
  80         user->private.kickoff_time          =
  81         user->private.pass_must_change_time = get_time_t_max();
  82         user->private.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.unknown_5 = 0x00000000; /* don't know */
  87         user->private.unknown_6 = 0x000004ec; /* don't know */
  88
  89         /* Some parts of samba strlen their pdb_get...() returns,
  90            so this keeps the interface unchanged for now. */
  91
  92         user->private.username = "";
  93         user->private.domain = "";
  94         user->private.nt_username = "";
  95         user->private.full_name = "";
  96         user->private.home_dir = "";
  97         user->private.logon_script = "";
  98         user->private.profile_path = "";
  99         user->private.acct_desc = "";
 100         user->private.workstations = "";
 101         user->private.unknown_str = "";
 102         user->private.munged_dial = "";
 103
 104         user->private.plaintext_pw = NULL;
 105
 106 }
 107
 108 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
 109 {
 110         if (*user) {
 111                 data_blob_clear_free(&((*user)->private.lm_pw));
 112                 data_blob_clear_free(&((*user)->private.nt_pw));
 113
 114                 if((*user)->private.plaintext_pw!=NULL)
 115                         memset((*user)->private.plaintext_pw,'\0',strlen((*user)->private.plaintext_pw));
 116                 talloc_destroy((*user)->mem_ctx);
 117                 *user = NULL;
 118         }
 119 }
 120
 121
 122 /**********************************************************************
 123  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
 124 ***********************************************************************/
 125
 126 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
 127 {
 128         if (*user != NULL) {
 129                 DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n"));
 130 #if 0
 131                 smb_panic("non-NULL pointer passed to pdb_init_sam\n");
 132 #endif
 133                 return NT_STATUS_UNSUCCESSFUL;
 134         }
 135
 136         if (!mem_ctx) {
 137                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 138                 return NT_STATUS_UNSUCCESSFUL;
 139         }
 140
 141         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 142
 143         if (*user==NULL) {
 144                 DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n"));
 145                 return NT_STATUS_NO_MEMORY;
 146         }
 147
 148         (*user)->mem_ctx = mem_ctx;
 149
 150         (*user)->free_fn = NULL;
 151
 152         pdb_fill_default_sam(*user);
 153
 154         return NT_STATUS_OK;
 155 }
 156
 157
 158 /*************************************************************
 159  Alloc memory and initialises a struct sam_passwd.
 160  ************************************************************/
 161
 162 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 163 {
 164         TALLOC_CTX *mem_ctx;
 165         NTSTATUS nt_status;
 166
 167         mem_ctx = talloc_init("passdb internal SAM_ACCOUNT allocation");
 168
 169         if (!mem_ctx) {
 170                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 171                 return NT_STATUS_NO_MEMORY;
 172         }
 173
 174         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 175                 talloc_destroy(mem_ctx);
 176                 return nt_status;
 177         }
 178
 179         (*user)->free_fn = destroy_pdb_talloc;
 180
 181         return NT_STATUS_OK;
 182 }
 183
 184
 185 /*************************************************************
 186  Initialises a struct sam_passwd with sane values.
 187  ************************************************************/
 188
 189 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 190 {
 191         NTSTATUS ret;
 192
 193         if (!pwd) {
 194                 return NT_STATUS_UNSUCCESSFUL;
 195         }
 196
 197         pdb_fill_default_sam(sam_account);
 198
 199         pdb_set_username(sam_account, pwd->pw_name, PDB_SET);
 200         pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET);
 201
 202         pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET);
 203
 204         pdb_set_domain (sam_account, get_global_sam_name(), PDB_DEFAULT);
 205
 206         /* When we get a proper uid -> SID and SID -> uid allocation
 207            mechinism, we should call it here.
 208
 209            We can't just set this to 0 or allow it only to be filled
 210            in when added to the backend, because the user's SID
 211            may already be in security descriptors etc.
 212
 213            -- abartlet 11-May-02
 214         */
 215
 216         ret = pdb_set_sam_sids(sam_account, pwd);
 217         if (!NT_STATUS_IS_OK(ret)) return ret;
 218
 219         /* check if this is a user account or a machine account */
 220         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 221         {
 222                 pdb_set_profile_path(sam_account,
 223                                      talloc_sub_specified((sam_account)->mem_ctx,
 224                                                             lp_logon_path(),
 225                                                             pwd->pw_name, global_myname(),
 226                                                             pwd->pw_uid, pwd->pw_gid),
 227                                      PDB_DEFAULT);
 228
 229                 pdb_set_homedir(sam_account,
 230                                 talloc_sub_specified((sam_account)->mem_ctx,
 231                                                        lp_logon_home(),
 232                                                        pwd->pw_name, global_myname(),
 233                                                        pwd->pw_uid, pwd->pw_gid),
 234                                 PDB_DEFAULT);
 235
 236                 pdb_set_dir_drive(sam_account,
 237                                   talloc_sub_specified((sam_account)->mem_ctx,
 238                                                          lp_logon_drive(),
 239                                                          pwd->pw_name, global_myname(),
 240                                                          pwd->pw_uid, pwd->pw_gid),
 241                                   PDB_DEFAULT);
 242
 243                 pdb_set_logon_script(sam_account,
 244                                      talloc_sub_specified((sam_account)->mem_ctx,
 245                                                             lp_logon_script(),
 246                                                             pwd->pw_name, global_myname(),
 247                                                             pwd->pw_uid, pwd->pw_gid),
 248                                      PDB_DEFAULT);
 249                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) {
 250                         DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name));
 251                         return NT_STATUS_UNSUCCESSFUL;
 252                 }
 253         } else {
 254                 if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) {
 255                         DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name));
 256                         return NT_STATUS_UNSUCCESSFUL;
 257                 }
 258         }
 259         return NT_STATUS_OK;
 260 }
 261
 262
 263 /*************************************************************
 264  Initialises a struct sam_passwd with sane values.
 265  ************************************************************/
 266
 267 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 268 {
 269         NTSTATUS nt_status;
 270
 271         if (!pwd) {
 272                 new_sam_acct = NULL;
 273                 return NT_STATUS_INVALID_PARAMETER;
 274         }
 275
 276         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 277                 new_sam_acct = NULL;
 278                 return nt_status;
 279         }
 280
 281         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 282                 pdb_free_sam(new_sam_acct);
 283                 new_sam_acct = NULL;
 284                 return nt_status;
 285         }
 286
 287         return NT_STATUS_OK;
 288 }
 289
 290
 291 /*************************************************************
 292  Initialises a SAM_ACCOUNT ready to add a new account, based
 293  on the UNIX user.  Pass in a RID if you have one
 294  ************************************************************/
 295
 296 NTSTATUS pdb_init_sam_new(SAM_ACCOUNT **new_sam_acct, const char *username,
 297                           uint32 rid)
 298 {
 299         NTSTATUS        nt_status = NT_STATUS_NO_MEMORY;
 300         struct passwd   *pwd;
 301         BOOL            ret;
 302
 303         pwd = Get_Pwnam(username);
 304
 305         if (!pwd)
 306                 return NT_STATUS_NO_SUCH_USER;
 307
 308         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(new_sam_acct, pwd))) {
 309                 *new_sam_acct = NULL;
 310                 return nt_status;
 311         }
 312
 313         /* see if we need to generate a new rid using the 2.2 algorithm */
 314         if ( rid == 0 && lp_enable_rid_algorithm() ) {
 315                 DEBUG(10,("pdb_init_sam_new: no RID specified.  Generating one via old algorithm\n"));
 316                 rid = fallback_pdb_uid_to_user_rid(pwd->pw_uid);
 317         }
 318
 319         /* set the new SID */
 320
 321         ret = pdb_set_user_sid_from_rid( *new_sam_acct, rid, PDB_SET );
 322
 323         return (ret ? NT_STATUS_OK : NT_STATUS_NO_SUCH_USER);
 324 }
 325
 326
 327 /**
 328  * Free the contets of the SAM_ACCOUNT, but not the structure.
 329  *
 330  * Also wipes the LM and NT hashes and plaintext password from
 331  * memory.
 332  *
 333  * @param user SAM_ACCOUNT to free members of.
 334  **/
 335
 336 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 337 {
 338
 339         /* Kill off sensitive data.  Free()ed by the
 340            talloc mechinism */
 341
 342         data_blob_clear_free(&(user->private.lm_pw));
 343         data_blob_clear_free(&(user->private.nt_pw));
 344         if (user->private.plaintext_pw!=NULL)
 345                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 346
 347         if (user->private.backend_private_data && user->private.backend_private_data_free_fn) {
 348                 user->private.backend_private_data_free_fn(&user->private.backend_private_data);
 349         }
 350 }
 351
 352
 353 /************************************************************
 354  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 355  ***********************************************************/
 356
 357 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 358 {
 359         if (user == NULL) {
 360                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 361 #if 0
 362                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 363 #endif
 364                 return NT_STATUS_UNSUCCESSFUL;
 365         }
 366
 367         pdb_free_sam_contents(user);
 368
 369         pdb_fill_default_sam(user);
 370
 371         return NT_STATUS_OK;
 372 }
 373
 374
 375 /************************************************************
 376  Free the SAM_ACCOUNT and the member pointers.
 377  ***********************************************************/
 378
 379 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 380 {
 381         if (*user == NULL) {
 382                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 383 #if 0
 384                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 385 #endif
 386                 return NT_STATUS_UNSUCCESSFUL;
 387         }
 388
 389         pdb_free_sam_contents(*user);
 390
 391         if ((*user)->free_fn) {
 392                 (*user)->free_fn(user);
 393         }
 394
 395         return NT_STATUS_OK;
 396 }
 397
 398 /**************************************************************************
 399  * This function will take care of all the steps needed to correctly
 400  * allocate and set the user SID, please do use this function to create new
 401  * users, messing with SIDs is not good.
 402  *
 403  * account_data must be provided initialized, pwd may be null.
 404  *                                                                      SSS
 405  ***************************************************************************/
 406
 407 NTSTATUS pdb_set_sam_sids(SAM_ACCOUNT *account_data, const struct passwd *pwd)
 408 {
 409         const char *guest_account = lp_guestaccount();
 410         GROUP_MAP map;
 411
 412         if (!account_data || !pwd) {
 413                 return NT_STATUS_INVALID_PARAMETER;
 414         }
 415
 416         /* this is a hack this thing should not be set
 417            this way --SSS */
 418         if (!(guest_account && *guest_account)) {
 419                 DEBUG(1, ("NULL guest account!?!?\n"));
 420                 return NT_STATUS_UNSUCCESSFUL;
 421         } else {
 422                 /* Ensure this *must* be set right */
 423                 if (strcmp(pwd->pw_name, guest_account) == 0) {
 424                         if (!pdb_set_user_sid_from_rid(account_data, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) {
 425                                 return NT_STATUS_UNSUCCESSFUL;
 426                         }
 427                         if (!pdb_set_group_sid_from_rid(account_data, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) {
 428                                 return NT_STATUS_UNSUCCESSFUL;
 429                         }
 430                         return NT_STATUS_OK;
 431                 }
 432         }
 433
 434         if (!pdb_set_user_sid_from_rid(account_data, fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 435                 DEBUG(0,("Can't set User SID from RID!\n"));
 436                 return NT_STATUS_INVALID_PARAMETER;
 437         }
 438
 439         /* call the mapping code here */
 440         if(pdb_getgrgid(&map, pwd->pw_gid)) {
 441                 if (!pdb_set_group_sid(account_data, &map.sid, PDB_SET)){
 442                         DEBUG(0,("Can't set Group SID!\n"));
 443                         return NT_STATUS_INVALID_PARAMETER;
 444                 }
 445         }
 446         else {
 447                 if (!pdb_set_group_sid_from_rid(account_data, pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 448                         DEBUG(0,("Can't set Group SID\n"));
 449                         return NT_STATUS_INVALID_PARAMETER;
 450                 }
 451         }
 452
 453         return NT_STATUS_OK;
 454 }
 455
 456 /**********************************************************
 457  Encode the account control bits into a string.
 458  length = length of string to encode into (including terminating
 459  null). length *MUST BE MORE THAN 2* !
 460  **********************************************************/
 461
 462 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 463 {
 464         static fstring acct_str;
 465         size_t i = 0;
 466
 467         acct_str[i++] = '[';
 468
 469         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 470         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 471         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 472         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 473         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 474         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 475         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 476         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 477         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 478         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 479         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 480
 481         for ( ; i < length - 2 ; i++ )
 482                 acct_str[i] = ' ';
 483
 484         i = length - 2;
 485         acct_str[i++] = ']';
 486         acct_str[i++] = '\0';
 487
 488         return acct_str;
 489 }
 490
 491 /**********************************************************
 492  Decode the account control bits from a string.
 493  **********************************************************/
 494
 495 uint16 pdb_decode_acct_ctrl(const char *p)
 496 {
 497         uint16 acct_ctrl = 0;
 498         BOOL finished = False;
 499
 500         /*
 501          * Check if the account type bits have been encoded after the
 502          * NT password (in the form [NDHTUWSLXI]).
 503          */
 504
 505         if (*p != '[')
 506                 return 0;
 507
 508         for (p++; *p && !finished; p++) {
 509                 switch (*p) {
 510                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 511                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 512                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 513                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 514                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 515                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 516                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 517                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 518                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 519                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 520                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 521             case ' ': { break; }
 522                         case ':':
 523                         case '\n':
 524                         case '\0':
 525                         case ']':
 526                         default:  { finished = True; }
 527                 }
 528         }
 529
 530         return acct_ctrl;
 531 }
 532
 533 /*************************************************************
 534  Routine to set 32 hex password characters from a 16 byte array.
 535 **************************************************************/
 536
 537 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 538 {
 539         if (pwd != NULL) {
 540                 int i;
 541                 for (i = 0; i < 16; i++)
 542                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 543         } else {
 544                 if (acct_ctrl & ACB_PWNOTREQ)
 545                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 546                 else
 547                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 548         }
 549 }
 550
 551 /*************************************************************
 552  Routine to get the 32 hex characters and turn them
 553  into a 16 byte array.
 554 **************************************************************/
 555
 556 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 557 {
 558         int i;
 559         unsigned char   lonybble, hinybble;
 560         const char      *hexchars = "0123456789ABCDEF";
 561         char           *p1, *p2;
 562
 563         if (!p)
 564                 return (False);
 565
 566         for (i = 0; i < 32; i += 2) {
 567                 hinybble = toupper(p[i]);
 568                 lonybble = toupper(p[i + 1]);
 569
 570                 p1 = strchr(hexchars, hinybble);
 571                 p2 = strchr(hexchars, lonybble);
 572
 573                 if (!p1 || !p2)
 574                         return (False);
 575
 576                 hinybble = PTR_DIFF(p1, hexchars);
 577                 lonybble = PTR_DIFF(p2, hexchars);
 578
 579                 pwd[i / 2] = (hinybble << 4) | lonybble;
 580         }
 581         return (True);
 582 }
 583
 584 int algorithmic_rid_base(void)
 585 {
 586         static int rid_offset = 0;
 587
 588         if (rid_offset != 0)
 589                 return rid_offset;
 590
 591         rid_offset = lp_algorithmic_rid_base();
 592
 593         if (rid_offset < BASE_RID) {
 594                 /* Try to prevent admin foot-shooting, we can't put algorithmic
 595                    rids below 1000, that's the 'well known RIDs' on NT */
 596                 DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID));
 597                 rid_offset = BASE_RID;
 598         }
 599         if (rid_offset & 1) {
 600                 DEBUG(0, ("algorithmic rid base must be even\n"));
 601                 rid_offset += 1;
 602         }
 603         return rid_offset;
 604 }
 605
 606 /*******************************************************************
 607  Converts NT user RID to a UNIX uid.
 608  ********************************************************************/
 609
 610 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 611 {
 612         int rid_offset = algorithmic_rid_base();
 613         return (uid_t)(((user_rid & (~USER_RID_TYPE)) - rid_offset)/RID_MULTIPLIER);
 614 }
 615
 616 /*******************************************************************
 617  converts UNIX uid to an NT User RID.
 618  ********************************************************************/
 619
 620 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 621 {
 622         int rid_offset = algorithmic_rid_base();
 623         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 624 }
 625
 626 /*******************************************************************
 627  Converts NT group RID to a UNIX gid.
 628  ********************************************************************/
 629
 630 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 631 {
 632         int rid_offset = algorithmic_rid_base();
 633         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 634 }
 635
 636 /*******************************************************************
 637  converts NT Group RID to a UNIX uid.
 638
 639  warning: you must not call that function only
 640  you must do a call to the group mapping first.
 641  there is not anymore a direct link between the gid and the rid.
 642  ********************************************************************/
 643
 644 uint32 pdb_gid_to_group_rid(gid_t gid)
 645 {
 646         int rid_offset = algorithmic_rid_base();
 647         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 648 }
 649
 650 /*******************************************************************
 651  Decides if a RID is a well known RID.
 652  ********************************************************************/
 653
 654 static BOOL pdb_rid_is_well_known(uint32 rid)
 655 {
 656         /* Not using rid_offset here, because this is the actual
 657            NT fixed value (1000) */
 658
 659         return (rid < BASE_RID);
 660 }
 661
 662 /*******************************************************************
 663  Decides if a RID is a user or group RID.
 664  ********************************************************************/
 665
 666 BOOL fallback_pdb_rid_is_user(uint32 rid)
 667 {
 668   /* lkcl i understand that NT attaches an enumeration to a RID
 669    * such that it can be identified as either a user, group etc
 670    * type.  there are 5 such categories, and they are documented.
 671    */
 672         /* However, they are not in the RID, just somthing you can query
 673            seperatly.  Sorry luke :-) */
 674
 675    if(pdb_rid_is_well_known(rid)) {
 676       /*
 677        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 678        * and DOMAIN_USER_RID_GUEST.
 679        */
 680      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 681        return True;
 682    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 683      return True;
 684    }
 685    return False;
 686 }
 687
 688 /*******************************************************************
 689  Convert a rid into a name. Used in the lookup SID rpc.
 690  ********************************************************************/
 691
 692 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 693 {
 694         uint32 rid;
 695         SAM_ACCOUNT *sam_account = NULL;
 696         GROUP_MAP map;
 697
 698         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 699                 DEBUG(0,("local_lookup_sid: sid_peek_check_rid return False! SID: %s\n",
 700                         sid_string_static(&map.sid)));
 701                 return False;
 702         }
 703         *psid_name_use = SID_NAME_UNKNOWN;
 704
 705         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 706
 707         if (rid == DOMAIN_USER_RID_ADMIN) {
 708                 const char **admin_list = lp_admin_users(-1);
 709                 *psid_name_use = SID_NAME_USER;
 710                 if (admin_list) {
 711                         const char *p = *admin_list;
 712                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 713                                 fstrcpy(name, "Administrator");
 714                 } else {
 715                         fstrcpy(name, "Administrator");
 716                 }
 717                 return True;
 718         }
 719
 720         /*
 721          * Don't try to convert the rid to a name if
 722          * running in appliance mode
 723          */
 724
 725         if (lp_hide_local_users())
 726                 return False;
 727
 728         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 729                 return False;
 730         }
 731
 732         /* see if the passdb can help us with the name of the user */
 733
 734         become_root();
 735         if (pdb_getsampwsid(sam_account, sid)) {
 736                 unbecome_root();
 737                 fstrcpy(name, pdb_get_username(sam_account));
 738                 *psid_name_use = SID_NAME_USER;
 739
 740                 pdb_free_sam(&sam_account);
 741
 742                 return True;
 743         }
 744         unbecome_root();
 745         pdb_free_sam(&sam_account);
 746
 747         if (pdb_getgrsid(&map, *sid)) {
 748                 if (map.gid!=(gid_t)-1) {
 749                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 750                 } else {
 751                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 752                 }
 753
 754                 fstrcpy(name, map.nt_name);
 755                 *psid_name_use = map.sid_name_use;
 756                 return True;
 757         }
 758
 759         if (fallback_pdb_rid_is_user(rid)) {
 760                 uid_t uid;
 761
 762                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 763
 764                 uid = fallback_pdb_user_rid_to_uid(rid);
 765                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 766
 767                 return False;  /* Indicates that this user was 'not mapped' */
 768         } else {
 769                 gid_t gid;
 770                 struct group *gr;
 771
 772                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 773
 774                 gid = pdb_group_rid_to_gid(rid);
 775                 gr = getgrgid(gid);
 776
 777                 *psid_name_use = SID_NAME_ALIAS;
 778
 779                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 780                          gr ? "succeeded" : "failed" ));
 781
 782                 if(!gr) {
 783                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 784                         return False; /* Indicates that this group was 'not mapped' */
 785                 }
 786
 787                 fstrcpy( name, gr->gr_name);
 788
 789                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 790                          (unsigned int)rid ));
 791                 return True;
 792         }
 793 }
 794
 795 /*******************************************************************
 796  Convert a name into a SID. Used in the lookup name rpc.
 797  ********************************************************************/
 798
 799 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 800 {
 801         extern DOM_SID global_sid_World_Domain;
 802         DOM_SID local_sid;
 803         fstring user;
 804         SAM_ACCOUNT *sam_account = NULL;
 805         struct group *grp;
 806         GROUP_MAP map;
 807
 808         *psid_name_use = SID_NAME_UNKNOWN;
 809
 810         /*
 811          * user may be quoted a const string, and map_username and
 812          * friends can modify it. Make a modifiable copy. JRA.
 813          */
 814
 815         fstrcpy(user, c_user);
 816
 817         sid_copy(&local_sid, get_global_sam_sid());
 818
 819         /*
 820          * Special case for MACHINE\Everyone. Map to the world_sid.
 821          */
 822
 823         if(strequal(user, "Everyone")) {
 824                 sid_copy( psid, &global_sid_World_Domain);
 825                 sid_append_rid(psid, 0);
 826                 *psid_name_use = SID_NAME_ALIAS;
 827                 return True;
 828         }
 829
 830         /*
 831          * Don't lookup local unix users if running in appliance mode
 832          */
 833         if (lp_hide_local_users())
 834                 return False;
 835
 836         (void)map_username(user);
 837
 838         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 839                 return False;
 840         }
 841
 842         become_root();
 843         if (pdb_getsampwnam(sam_account, user)) {
 844                 unbecome_root();
 845                 sid_copy(psid, pdb_get_user_sid(sam_account));
 846                 *psid_name_use = SID_NAME_USER;
 847
 848                 pdb_free_sam(&sam_account);
 849                 return True;
 850         }
 851         unbecome_root();
 852
 853         pdb_free_sam(&sam_account);
 854
 855         /*
 856          * Maybe it was a group ?
 857          */
 858
 859         /* check if it's a mapped group */
 860         if (pdb_getgrnam(&map, user)) {
 861                 /* yes it's a mapped group */
 862                 sid_copy(&local_sid, &map.sid);
 863                 *psid_name_use = map.sid_name_use;
 864         } else {
 865                 /* it's not a mapped group */
 866                 grp = getgrnam(user);
 867                 if(!grp)
 868                         return False;
 869
 870                 /*
 871                  *check if it's mapped, if it is reply it doesn't exist
 872                  *
 873                  * that's to prevent this case:
 874                  *
 875                  * unix group ug is mapped to nt group ng
 876                  * someone does a lookup on ug
 877                  * we must not reply as it doesn't "exist" anymore
 878                  * for NT. For NT only ng exists.
 879                  * JFM, 30/11/2001
 880                  */
 881
 882                 if (pdb_getgrgid(&map, grp->gr_gid)){
 883                         return False;
 884                 }
 885
 886                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 887                 *psid_name_use = SID_NAME_ALIAS;
 888         }
 889
 890         sid_copy( psid, &local_sid);
 891
 892         return True;
 893 }
 894
 895 /*************************************************************
 896  Change a password entry in the local smbpasswd file.
 897  *************************************************************/
 898
 899 BOOL local_password_change(const char *user_name, int local_flags,
 900                            const char *new_passwd,
 901                            char *err_str, size_t err_str_len,
 902                            char *msg_str, size_t msg_str_len)
 903 {
 904         SAM_ACCOUNT     *sam_pass=NULL;
 905         uint16 other_acb;
 906
 907         *err_str = '\0';
 908         *msg_str = '\0';
 909
 910         /* Get the smb passwd entry for this user */
 911         pdb_init_sam(&sam_pass);
 912
 913         become_root();
 914         if(!pdb_getsampwnam(sam_pass, user_name)) {
 915                 unbecome_root();
 916                 pdb_free_sam(&sam_pass);
 917
 918                 if ((local_flags & LOCAL_ADD_USER) || (local_flags & LOCAL_DELETE_USER)) {
 919                         /* Might not exist in /etc/passwd.  Use rid algorithm here */
 920                         if (!NT_STATUS_IS_OK(pdb_init_sam_new(&sam_pass, user_name, 0))) {
 921                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
 922                                 return False;
 923                         }
 924                 } else {
 925                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
 926                         return False;
 927                 }
 928         } else {
 929                 unbecome_root();
 930                 /* the entry already existed */
 931                 local_flags &= ~LOCAL_ADD_USER;
 932         }
 933
 934         /* the 'other' acb bits not being changed here */
 935         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
 936         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 937                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
 938                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
 939                         pdb_free_sam(&sam_pass);
 940                         return False;
 941                 }
 942         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 943                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
 944                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
 945                         pdb_free_sam(&sam_pass);
 946                         return False;
 947                 }
 948         } else {
 949                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
 950                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
 951                         pdb_free_sam(&sam_pass);
 952                         return False;
 953                 }
 954         }
 955
 956         /*
 957          * We are root - just write the new password
 958          * and the valid last change time.
 959          */
 960
 961         if (local_flags & LOCAL_DISABLE_USER) {
 962                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
 963                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
 964                         pdb_free_sam(&sam_pass);
 965                         return False;
 966                 }
 967         } else if (local_flags & LOCAL_ENABLE_USER) {
 968                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 969                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 970                         pdb_free_sam(&sam_pass);
 971                         return False;
 972                 }
 973         }
 974
 975         if (local_flags & LOCAL_SET_NO_PASSWORD) {
 976                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
 977                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
 978                         pdb_free_sam(&sam_pass);
 979                         return False;
 980                 }
 981         } else if (local_flags & LOCAL_SET_PASSWORD) {
 982                 /*
 983                  * If we're dealing with setting a completely empty user account
 984                  * ie. One with a password of 'XXXX', but not set disabled (like
 985                  * an account created from scratch) then if the old password was
 986                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
 987                  * We remove that as we're giving this user their first password
 988                  * and the decision hasn't really been made to disable them (ie.
 989                  * don't create them disabled). JRA.
 990                  */
 991                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
 992                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 993                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 994                                 pdb_free_sam(&sam_pass);
 995                                 return False;
 996                         }
 997                 }
 998                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
 999                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1000                         pdb_free_sam(&sam_pass);
1001                         return False;
1002                 }
1003
1004                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1005                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1006                         pdb_free_sam(&sam_pass);
1007                         return False;
1008                 }
1009         }
1010
1011         if (local_flags & LOCAL_ADD_USER) {
1012                 if (pdb_add_sam_account(sam_pass)) {
1013                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1014                         pdb_free_sam(&sam_pass);
1015                         return True;
1016                 } else {
1017                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1018                         pdb_free_sam(&sam_pass);
1019                         return False;
1020                 }
1021         } else if (local_flags & LOCAL_DELETE_USER) {
1022                 if (!pdb_delete_sam_account(sam_pass)) {
1023                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1024                         pdb_free_sam(&sam_pass);
1025                         return False;
1026                 }
1027                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1028         } else {
1029                 if(!pdb_update_sam_account(sam_pass)) {
1030                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1031                         pdb_free_sam(&sam_pass);
1032                         return False;
1033                 }
1034                 if(local_flags & LOCAL_DISABLE_USER)
1035                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1036                 else if (local_flags & LOCAL_ENABLE_USER)
1037                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1038                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1039                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1040         }
1041
1042         pdb_free_sam(&sam_pass);
1043         return True;
1044 }
1045
1046 /****************************************************************************
1047  Convert a uid to SID - locally.
1048 ****************************************************************************/
1049
1050 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
1051 {
1052         SAM_ACCOUNT *sampw = NULL;
1053         struct passwd *unix_pw;
1054         BOOL ret;
1055
1056         unix_pw = sys_getpwuid( uid );
1057
1058         if ( !unix_pw ) {
1059                 DEBUG(4,("local_uid_to_sid: host has know idea of uid %lu\n", (unsigned long)uid));
1060                 return NULL;
1061         }
1062
1063         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1064                 DEBUG(0,("local_uid_to_sid: failed to allocate SAM_ACCOUNT object\n"));
1065                 return NULL;
1066         }
1067
1068         become_root();
1069         ret = pdb_getsampwnam( sampw, unix_pw->pw_name );
1070         unbecome_root();
1071
1072         if ( ret )
1073                 sid_copy( psid, pdb_get_user_sid(sampw) );
1074         else {
1075                 DEBUG(4,("local_uid_to_sid: User %s [uid == %lu] has no samba account\n",
1076                         unix_pw->pw_name, (unsigned long)uid));
1077
1078                 if ( !lp_enable_rid_algorithm() )
1079                         return NULL;
1080
1081                 DEBUG(8,("local_uid_to_sid: falling back to RID algorithm\n"));
1082
1083                 sid_copy( psid, get_global_sam_sid() );
1084                 sid_append_rid( psid, fallback_pdb_uid_to_user_rid(uid) );
1085         }
1086
1087
1088         DEBUG(10,("local_uid_to_sid:  uid (%d) -> SID %s (%s).\n",
1089                 (unsigned int)uid, sid_string_static(psid), unix_pw->pw_name));
1090
1091         return psid;
1092 }
1093
1094 /****************************************************************************
1095  Convert a SID to uid - locally.
1096 ****************************************************************************/
1097
1098 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1099 {
1100         SAM_ACCOUNT *sampw = NULL;
1101         struct passwd *unix_pw;
1102         const char *user_name;
1103
1104         *name_type = SID_NAME_UNKNOWN;
1105
1106         /*
1107          * We can only convert to a uid if this is our local
1108          * Domain SID (ie. we are the controling authority).
1109          */
1110         if (!sid_check_is_in_our_domain(psid) ) {
1111                 DEBUG(5,("local_sid_to_uid: this SID (%s) is not from our domain\n", sid_string_static(psid)));
1112                 return False;
1113         }
1114
1115         /* lookup the user account */
1116
1117         if ( !NT_STATUS_IS_OK(pdb_init_sam(&sampw)) ) {
1118                 DEBUG(0,("local_sid_to_uid: Failed to allocate memory for SAM_ACCOUNT object\n"));
1119                 return False;
1120         }
1121
1122         become_root();
1123         if ( !pdb_getsampwsid(sampw, psid) ) {
1124                 unbecome_root();
1125                 DEBUG(8,("local_sid_to_uid: Could not find SID %s in passdb\n",
1126                         sid_string_static(psid)));
1127                 return False;
1128         }
1129         unbecome_root();
1130
1131         user_name = pdb_get_username(sampw);
1132
1133         unix_pw = sys_getpwnam( user_name );
1134
1135         if ( !unix_pw ) {
1136                 DEBUG(0,("local_sid_to_uid: %s found in passdb but getpwnam() return NULL!\n",
1137                         user_name));
1138                 pdb_free_sam( &sampw );
1139                 return False;
1140         }
1141
1142         *puid = unix_pw->pw_uid;
1143
1144         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_string_static(psid),
1145                 (unsigned int)*puid, user_name ));
1146
1147         *name_type = SID_NAME_USER;
1148
1149         return True;
1150 }
1151
1152 /****************************************************************************
1153  Convert a gid to SID - locally.
1154 ****************************************************************************/
1155
1156 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
1157 {
1158         GROUP_MAP group;
1159
1160         /* we don't need to disable winbindd since the gid is stored in
1161            the GROUP_MAP object */
1162
1163         if ( !pdb_getgrgid( &group, gid ) ) {
1164
1165                 /* fallback to rid mapping if enabled */
1166
1167                 if ( lp_enable_rid_algorithm() ) {
1168                         sid_copy(psid, get_global_sam_sid());
1169                         sid_append_rid(psid, pdb_gid_to_group_rid(gid));
1170
1171                         DEBUG(10,("local_gid_to_sid: Fall back to algorithmic mapping: %u -> %s\n",
1172                                 (unsigned int)gid, sid_string_static(psid)));
1173
1174                         return psid;
1175                 }
1176                 else
1177                         return NULL;
1178         }
1179
1180         sid_copy( psid, &group.sid );
1181
1182         DEBUG(10,("local_gid_to_sid:  gid (%d) -> SID %s.\n",
1183                 (unsigned int)gid, sid_string_static(psid)));
1184
1185         return psid;
1186 }
1187
1188 /****************************************************************************
1189  Convert a SID to gid - locally.
1190 ****************************************************************************/
1191
1192 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
1193 {
1194         uint32 rid;
1195         GROUP_MAP group;
1196
1197         *name_type = SID_NAME_UNKNOWN;
1198
1199         /* This call can enumerate group mappings for foreign sids as well.
1200            So don't check for a match against our domain SID */
1201
1202         /* we don't need to disable winbindd since the gid is stored in
1203            the GROUP_MAP object */
1204
1205         if ( !pdb_getgrsid(&group, *psid) ) {
1206
1207                 /* fallback to rid mapping if enabled */
1208
1209                 if ( lp_enable_rid_algorithm() ) {
1210
1211                         if (!sid_check_is_in_our_domain(psid) ) {
1212                                 DEBUG(5,("local_sid_to_gid: RID algorithm only supported for our domain (%s is not)\n", sid_string_static(psid)));
1213                                 return False;
1214                         }
1215
1216                         if (!sid_peek_rid(psid, &rid)) {
1217                                 DEBUG(10,("local_sid_to_uid: invalid SID!\n"));
1218                                         return False;
1219                         }
1220
1221                         DEBUG(10,("local_sid_to_gid: Fall back to algorithmic mapping\n"));
1222
1223                         if (fallback_pdb_rid_is_user(rid)) {
1224                                 DEBUG(3, ("local_sid_to_gid: SID %s is *NOT* a group\n", sid_string_static(psid)));
1225                                 return False;
1226                         } else {
1227                                 *pgid = pdb_group_rid_to_gid(rid);
1228                                 DEBUG(10,("local_sid_to_gid: mapping: %s -> %u\n", sid_string_static(psid), (unsigned int)(*pgid)));
1229                                 return True;
1230                         }
1231                 }
1232
1233                 return False;
1234         }
1235
1236         *pgid = group.gid;
1237
1238         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u)\n", sid_string_static(psid),
1239                 (unsigned int)*pgid));
1240
1241         return True;
1242 }
1243
1244 /**********************************************************************
1245  Marshall/unmarshall SAM_ACCOUNT structs.
1246  *********************************************************************/
1247
1248 #define TDB_FORMAT_STRING       "ddddddBBBBBBBBBBBBddBBwdwdBdd"
1249
1250 /**********************************************************************
1251  Intialize a SAM_ACCOUNT struct from a BYTE buffer of size len
1252  *********************************************************************/
1253
1254 BOOL init_sam_from_buffer(SAM_ACCOUNT *sampass, uint8 *buf, uint32 buflen)
1255 {
1256
1257         /* times are stored as 32bit integer
1258            take care on system with 64bit wide time_t
1259            --SSS */
1260         uint32  logon_time,
1261                 logoff_time,
1262                 kickoff_time,
1263                 pass_last_set_time,
1264                 pass_can_change_time,
1265                 pass_must_change_time;
1266         char *username;
1267         char *domain;
1268         char *nt_username;
1269         char *dir_drive;
1270         char *unknown_str;
1271         char *munged_dial;
1272         char *fullname;
1273         char *homedir;
1274         char *logon_script;
1275         char *profile_path;
1276         char *acct_desc;
1277         char *workstations;
1278         uint32  username_len, domain_len, nt_username_len,
1279                 dir_drive_len, unknown_str_len, munged_dial_len,
1280                 fullname_len, homedir_len, logon_script_len,
1281                 profile_path_len, acct_desc_len, workstations_len;
1282
1283         uint32  user_rid, group_rid, unknown_3, hours_len, unknown_5, unknown_6;
1284         uint16  acct_ctrl, logon_divs;
1285         uint8   *hours;
1286         static uint8    *lm_pw_ptr, *nt_pw_ptr;
1287         uint32          len = 0;
1288         uint32          lm_pw_len, nt_pw_len, hourslen;
1289         BOOL ret = True;
1290         uid_t uid = -1;
1291         gid_t gid = -1;
1292
1293         if(sampass == NULL || buf == NULL) {
1294                 DEBUG(0, ("init_sam_from_buffer: NULL parameters found!\n"));
1295                 return False;
1296         }
1297
1298         /* unpack the buffer into variables */
1299         len = tdb_unpack (buf, buflen, TDB_FORMAT_STRING,
1300                 &logon_time,
1301                 &logoff_time,
1302                 &kickoff_time,
1303                 &pass_last_set_time,
1304                 &pass_can_change_time,
1305                 &pass_must_change_time,
1306                 &username_len, &username,
1307                 &domain_len, &domain,
1308                 &nt_username_len, &nt_username,
1309                 &fullname_len, &fullname,
1310                 &homedir_len, &homedir,
1311                 &dir_drive_len, &dir_drive,
1312                 &logon_script_len, &logon_script,
1313                 &profile_path_len, &profile_path,
1314                 &acct_desc_len, &acct_desc,
1315                 &workstations_len, &workstations,
1316                 &unknown_str_len, &unknown_str,
1317                 &munged_dial_len, &munged_dial,
1318                 &user_rid,
1319                 &group_rid,
1320                 &lm_pw_len, &lm_pw_ptr,
1321                 &nt_pw_len, &nt_pw_ptr,
1322                 &acct_ctrl,
1323                 &unknown_3,
1324                 &logon_divs,
1325                 &hours_len,
1326                 &hourslen, &hours,
1327                 &unknown_5,
1328                 &unknown_6);
1329
1330         if (len == -1)  {
1331                 ret = False;
1332                 goto done;
1333         }
1334
1335         pdb_set_logon_time(sampass, logon_time, PDB_SET);
1336         pdb_set_logoff_time(sampass, logoff_time, PDB_SET);
1337         pdb_set_kickoff_time(sampass, kickoff_time, PDB_SET);
1338         pdb_set_pass_can_change_time(sampass, pass_can_change_time, PDB_SET);
1339         pdb_set_pass_must_change_time(sampass, pass_must_change_time, PDB_SET);
1340         pdb_set_pass_last_set_time(sampass, pass_last_set_time, PDB_SET);
1341
1342         pdb_set_username(sampass, username, PDB_SET);
1343         pdb_set_domain(sampass, domain, PDB_SET);
1344         pdb_set_nt_username(sampass, nt_username, PDB_SET);
1345         pdb_set_fullname(sampass, fullname, PDB_SET);
1346
1347         if (homedir) {
1348                 pdb_set_homedir(sampass, homedir, PDB_SET);
1349         }
1350         else {
1351                 pdb_set_homedir(sampass,
1352                                 talloc_sub_specified(sampass->mem_ctx,
1353                                                        lp_logon_home(),
1354                                                        username, domain,
1355                                                        uid, gid),
1356                                 PDB_DEFAULT);
1357         }
1358
1359         if (dir_drive)
1360                 pdb_set_dir_drive(sampass, dir_drive, PDB_SET);
1361         else {
1362                 pdb_set_dir_drive(sampass,
1363                                   talloc_sub_specified(sampass->mem_ctx,
1364                                                          lp_logon_drive(),
1365                                                          username, domain,
1366                                                          uid, gid),
1367                                   PDB_DEFAULT);
1368         }
1369
1370         if (logon_script)
1371                 pdb_set_logon_script(sampass, logon_script, PDB_SET);
1372         else {
1373                 pdb_set_logon_script(sampass,
1374                                      talloc_sub_specified(sampass->mem_ctx,
1375                                                             lp_logon_script(),
1376                                                             username, domain,
1377                                                             uid, gid),
1378                                   PDB_DEFAULT);
1379         }
1380
1381         if (profile_path) {
1382                 pdb_set_profile_path(sampass, profile_path, PDB_SET);
1383         } else {
1384                 pdb_set_profile_path(sampass,
1385                                      talloc_sub_specified(sampass->mem_ctx,
1386                                                             lp_logon_path(),
1387                                                             username, domain,
1388                                                             uid, gid),
1389                                      PDB_DEFAULT);
1390         }
1391
1392         pdb_set_acct_desc(sampass, acct_desc, PDB_SET);
1393         pdb_set_workstations(sampass, workstations, PDB_SET);
1394         pdb_set_munged_dial(sampass, munged_dial, PDB_SET);
1395
1396         if (lm_pw_ptr && lm_pw_len == LM_HASH_LEN) {
1397                 if (!pdb_set_lanman_passwd(sampass, lm_pw_ptr, PDB_SET)) {
1398                         ret = False;
1399                         goto done;
1400                 }
1401         }
1402
1403         if (nt_pw_ptr && nt_pw_len == NT_HASH_LEN) {
1404                 if (!pdb_set_nt_passwd(sampass, nt_pw_ptr, PDB_SET)) {
1405                         ret = False;
1406                         goto done;
1407                 }
1408         }
1409
1410         pdb_set_user_sid_from_rid(sampass, user_rid, PDB_SET);
1411         pdb_set_group_sid_from_rid(sampass, group_rid, PDB_SET);
1412         pdb_set_unknown_3(sampass, unknown_3, PDB_SET);
1413         pdb_set_hours_len(sampass, hours_len, PDB_SET);
1414         pdb_set_unknown_5(sampass, unknown_5, PDB_SET);
1415         pdb_set_unknown_6(sampass, unknown_6, PDB_SET);
1416         pdb_set_acct_ctrl(sampass, acct_ctrl, PDB_SET);
1417         pdb_set_logon_divs(sampass, logon_divs, PDB_SET);
1418         pdb_set_hours(sampass, hours, PDB_SET);
1419
1420 done:
1421
1422         SAFE_FREE(username);
1423         SAFE_FREE(domain);
1424         SAFE_FREE(nt_username);
1425         SAFE_FREE(fullname);
1426         SAFE_FREE(homedir);
1427         SAFE_FREE(dir_drive);
1428         SAFE_FREE(logon_script);
1429         SAFE_FREE(profile_path);
1430         SAFE_FREE(acct_desc);
1431         SAFE_FREE(workstations);
1432         SAFE_FREE(munged_dial);
1433         SAFE_FREE(unknown_str);
1434         SAFE_FREE(hours);
1435
1436         return ret;
1437 }
1438
1439 /**********************************************************************
1440  Intialize a BYTE buffer from a SAM_ACCOUNT struct
1441  *********************************************************************/
1442
1443 uint32 init_buffer_from_sam (uint8 **buf, const SAM_ACCOUNT *sampass, BOOL size_only)
1444 {
1445         size_t len, buflen;
1446
1447         /* times are stored as 32bit integer
1448            take care on system with 64bit wide time_t
1449            --SSS */
1450         uint32  logon_time,
1451                 logoff_time,
1452                 kickoff_time,
1453                 pass_last_set_time,
1454                 pass_can_change_time,
1455                 pass_must_change_time;
1456
1457         uint32  user_rid, group_rid;
1458
1459         const char *username;
1460         const char *domain;
1461         const char *nt_username;
1462         const char *dir_drive;
1463         const char *unknown_str;
1464         const char *munged_dial;
1465         const char *fullname;
1466         const char *homedir;
1467         const char *logon_script;
1468         const char *profile_path;
1469         const char *acct_desc;
1470         const char *workstations;
1471         uint32  username_len, domain_len, nt_username_len,
1472                 dir_drive_len, unknown_str_len, munged_dial_len,
1473                 fullname_len, homedir_len, logon_script_len,
1474                 profile_path_len, acct_desc_len, workstations_len;
1475
1476         const uint8 *lm_pw;
1477         const uint8 *nt_pw;
1478         uint32  lm_pw_len = 16;
1479         uint32  nt_pw_len = 16;
1480
1481         /* do we have a valid SAM_ACCOUNT pointer? */
1482         if (sampass == NULL) {
1483                 DEBUG(0, ("init_buffer_from_sam: SAM_ACCOUNT is NULL!\n"));
1484                 return -1;
1485         }
1486
1487         *buf = NULL;
1488         buflen = 0;
1489
1490         logon_time = (uint32)pdb_get_logon_time(sampass);
1491         logoff_time = (uint32)pdb_get_logoff_time(sampass);
1492         kickoff_time = (uint32)pdb_get_kickoff_time(sampass);
1493         pass_can_change_time = (uint32)pdb_get_pass_can_change_time(sampass);
1494         pass_must_change_time = (uint32)pdb_get_pass_must_change_time(sampass);
1495         pass_last_set_time = (uint32)pdb_get_pass_last_set_time(sampass);
1496
1497         user_rid = pdb_get_user_rid(sampass);
1498         group_rid = pdb_get_group_rid(sampass);
1499
1500         username = pdb_get_username(sampass);
1501         if (username)
1502                 username_len = strlen(username) +1;
1503         else
1504                 username_len = 0;
1505
1506         domain = pdb_get_domain(sampass);
1507         if (domain)
1508                 domain_len = strlen(domain) +1;
1509         else
1510                 domain_len = 0;
1511
1512         nt_username = pdb_get_nt_username(sampass);
1513         if (nt_username)
1514                 nt_username_len = strlen(nt_username) +1;
1515         else
1516                 nt_username_len = 0;
1517
1518         fullname = pdb_get_fullname(sampass);
1519         if (fullname)
1520                 fullname_len = strlen(fullname) +1;
1521         else
1522                 fullname_len = 0;
1523
1524         /*
1525          * Only updates fields which have been set (not defaults from smb.conf)
1526          */
1527
1528         if (!IS_SAM_DEFAULT(sampass, PDB_DRIVE))
1529                 dir_drive = pdb_get_dir_drive(sampass);
1530         else
1531                 dir_drive = NULL;
1532         if (dir_drive)
1533                 dir_drive_len = strlen(dir_drive) +1;
1534         else
1535                 dir_drive_len = 0;
1536
1537         if (!IS_SAM_DEFAULT(sampass, PDB_SMBHOME))
1538                 homedir = pdb_get_homedir(sampass);
1539         else
1540                 homedir = NULL;
1541         if (homedir)
1542                 homedir_len = strlen(homedir) +1;
1543         else
1544                 homedir_len = 0;
1545
1546         if (!IS_SAM_DEFAULT(sampass, PDB_LOGONSCRIPT))
1547                 logon_script = pdb_get_logon_script(sampass);
1548         else
1549                 logon_script = NULL;
1550         if (logon_script)
1551                 logon_script_len = strlen(logon_script) +1;
1552         else
1553                 logon_script_len = 0;
1554
1555         if (!IS_SAM_DEFAULT(sampass, PDB_PROFILE))
1556                 profile_path = pdb_get_profile_path(sampass);
1557         else
1558                 profile_path = NULL;
1559         if (profile_path)
1560                 profile_path_len = strlen(profile_path) +1;
1561         else
1562                 profile_path_len = 0;
1563
1564         lm_pw = pdb_get_lanman_passwd(sampass);
1565         if (!lm_pw)
1566                 lm_pw_len = 0;
1567
1568         nt_pw = pdb_get_nt_passwd(sampass);
1569         if (!nt_pw)
1570                 nt_pw_len = 0;
1571
1572         acct_desc = pdb_get_acct_desc(sampass);
1573         if (acct_desc)
1574                 acct_desc_len = strlen(acct_desc) +1;
1575         else
1576                 acct_desc_len = 0;
1577
1578         workstations = pdb_get_workstations(sampass);
1579         if (workstations)
1580                 workstations_len = strlen(workstations) +1;
1581         else
1582                 workstations_len = 0;
1583
1584         unknown_str = NULL;
1585         unknown_str_len = 0;
1586
1587         munged_dial = pdb_get_munged_dial(sampass);
1588         if (munged_dial)
1589                 munged_dial_len = strlen(munged_dial) +1;
1590         else
1591                 munged_dial_len = 0;
1592
1593         /* one time to get the size needed */
1594         len = tdb_pack(NULL, 0,  TDB_FORMAT_STRING,
1595                 logon_time,
1596                 logoff_time,
1597                 kickoff_time,
1598                 pass_last_set_time,
1599                 pass_can_change_time,
1600                 pass_must_change_time,
1601                 username_len, username,
1602                 domain_len, domain,
1603                 nt_username_len, nt_username,
1604                 fullname_len, fullname,
1605                 homedir_len, homedir,
1606                 dir_drive_len, dir_drive,
1607                 logon_script_len, logon_script,
1608                 profile_path_len, profile_path,
1609                 acct_desc_len, acct_desc,
1610                 workstations_len, workstations,
1611                 unknown_str_len, unknown_str,
1612                 munged_dial_len, munged_dial,
1613                 user_rid,
1614                 group_rid,
1615                 lm_pw_len, lm_pw,
1616                 nt_pw_len, nt_pw,
1617                 pdb_get_acct_ctrl(sampass),
1618                 pdb_get_unknown_3(sampass),
1619                 pdb_get_logon_divs(sampass),
1620                 pdb_get_hours_len(sampass),
1621                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1622                 pdb_get_unknown_5(sampass),
1623                 pdb_get_unknown_6(sampass));
1624
1625
1626         if (size_only)
1627                 return buflen;
1628
1629         /* malloc the space needed */
1630         if ( (*buf=(uint8*)malloc(len)) == NULL) {
1631                 DEBUG(0,("init_buffer_from_sam: Unable to malloc() memory for buffer!\n"));
1632                 return (-1);
1633         }
1634
1635         /* now for the real call to tdb_pack() */
1636         buflen = tdb_pack(*buf, len,  TDB_FORMAT_STRING,
1637                 logon_time,
1638                 logoff_time,
1639                 kickoff_time,
1640                 pass_last_set_time,
1641                 pass_can_change_time,
1642                 pass_must_change_time,
1643                 username_len, username,
1644                 domain_len, domain,
1645                 nt_username_len, nt_username,
1646                 fullname_len, fullname,
1647                 homedir_len, homedir,
1648                 dir_drive_len, dir_drive,
1649                 logon_script_len, logon_script,
1650                 profile_path_len, profile_path,
1651                 acct_desc_len, acct_desc,
1652                 workstations_len, workstations,
1653                 unknown_str_len, unknown_str,
1654                 munged_dial_len, munged_dial,
1655                 user_rid,
1656                 group_rid,
1657                 lm_pw_len, lm_pw,
1658                 nt_pw_len, nt_pw,
1659                 pdb_get_acct_ctrl(sampass),
1660                 pdb_get_unknown_3(sampass),
1661                 pdb_get_logon_divs(sampass),
1662                 pdb_get_hours_len(sampass),
1663                 MAX_HOURS_LEN, pdb_get_hours(sampass),
1664                 pdb_get_unknown_5(sampass),
1665                 pdb_get_unknown_6(sampass));
1666
1667
1668         /* check to make sure we got it correct */
1669         if (buflen != len) {
1670                 DEBUG(0, ("init_buffer_from_sam: somthing odd is going on here: bufflen (%lu) != len (%lu) in tdb_pack operations!\n",
1671                           (unsigned long)buflen, (unsigned long)len));
1672                 /* error */
1673                 SAFE_FREE (*buf);
1674                 return (-1);
1675         }
1676
1677         return (buflen);
1678 }