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  * This is set on startup - it defines the SID for this
  32  * machine, and therefore the SAM database for which it is
  33  * responsible.
  34  */
  35
  36 /************************************************************
  37  Fill the SAM_ACCOUNT with default values.
  38  ***********************************************************/
  39
  40 void pdb_fill_default_sam(SAM_ACCOUNT *user)
  41 {
  42         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  43
  44         /* no initial methods */
  45         user->methods = NULL;
  46
  47         /* Don't change these timestamp settings without a good reason.
  48            They are important for NT member server compatibility. */
  49
  50         user->private.logon_time            = (time_t)0;
  51         user->private.pass_last_set_time    = (time_t)0;
  52         user->private.pass_can_change_time  = (time_t)0;
  53         user->private.logoff_time           =
  54         user->private.kickoff_time          =
  55         user->private.pass_must_change_time = get_time_t_max();
  56         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  57         user->private.logon_divs = 168;         /* hours per week */
  58         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  59         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  60         user->private.unknown_5 = 0x00000000; /* don't know */
  61         user->private.unknown_6 = 0x000004ec; /* don't know */
  62
  63         /* Some parts of samba strlen their pdb_get...() returns,
  64            so this keeps the interface unchanged for now. */
  65
  66         user->private.username = "";
  67         user->private.domain = "";
  68         user->private.nt_username = "";
  69         user->private.full_name = "";
  70         user->private.home_dir = "";
  71         user->private.logon_script = "";
  72         user->private.profile_path = "";
  73         user->private.acct_desc = "";
  74         user->private.workstations = "";
  75         user->private.unknown_str = "";
  76         user->private.munged_dial = "";
  77
  78         user->private.plaintext_pw = NULL;
  79
  80 }
  81
  82 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
  83 {
  84         if (*user) {
  85                 data_blob_clear_free(&((*user)->private.lm_pw));
  86                 data_blob_clear_free(&((*user)->private.nt_pw));
  87
  88                 if((*user)->private.plaintext_pw!=NULL)
  89                         memset((*user)->private.plaintext_pw,'\0',strlen((*user)->private.plaintext_pw));
  90                 talloc_destroy((*user)->mem_ctx);
  91                 *user = NULL;
  92         }
  93 }
  94
  95
  96 /**********************************************************************
  97  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
  98 ***********************************************************************/
  99
 100 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
 101 {
 102         if (*user != NULL) {
 103                 DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n"));
 104 #if 0
 105                 smb_panic("non-NULL pointer passed to pdb_init_sam\n");
 106 #endif
 107                 return NT_STATUS_UNSUCCESSFUL;
 108         }
 109
 110         if (!mem_ctx) {
 111                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 112                 return NT_STATUS_UNSUCCESSFUL;
 113         }
 114
 115         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 116
 117         if (*user==NULL) {
 118                 DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n"));
 119                 return NT_STATUS_NO_MEMORY;
 120         }
 121
 122         (*user)->mem_ctx = mem_ctx;
 123
 124         (*user)->free_fn = NULL;
 125
 126         pdb_fill_default_sam(*user);
 127
 128         return NT_STATUS_OK;
 129 }
 130
 131
 132 /*************************************************************
 133  Alloc memory and initialises a struct sam_passwd.
 134  ************************************************************/
 135
 136 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 137 {
 138         TALLOC_CTX *mem_ctx;
 139         NTSTATUS nt_status;
 140
 141         mem_ctx = talloc_init("passdb internal SAM_ACCOUNT allocation");
 142
 143         if (!mem_ctx) {
 144                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 145                 return NT_STATUS_NO_MEMORY;
 146         }
 147
 148         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 149                 talloc_destroy(mem_ctx);
 150                 return nt_status;
 151         }
 152
 153         (*user)->free_fn = destroy_pdb_talloc;
 154
 155         return NT_STATUS_OK;
 156 }
 157
 158
 159 /*************************************************************
 160  Initialises a struct sam_passwd with sane values.
 161  ************************************************************/
 162
 163 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 164 {
 165         NTSTATUS ret;
 166
 167         if (!pwd) {
 168                 return NT_STATUS_UNSUCCESSFUL;
 169         }
 170
 171         pdb_fill_default_sam(sam_account);
 172
 173         pdb_set_username(sam_account, pwd->pw_name, PDB_SET);
 174         pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET);
 175
 176         pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET);
 177
 178         pdb_set_domain (sam_account, lp_workgroup(), PDB_DEFAULT);
 179
 180         /* When we get a proper uid -> SID and SID -> uid allocation
 181            mechinism, we should call it here.
 182
 183            We can't just set this to 0 or allow it only to be filled
 184            in when added to the backend, because the user's SID
 185            may already be in security descriptors etc.
 186
 187            -- abartlet 11-May-02
 188         */
 189
 190         ret = pdb_set_sam_sids(sam_account, pwd);
 191         if (NT_STATUS_IS_ERR(ret)) return ret;
 192
 193         /* check if this is a user account or a machine account */
 194         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 195         {
 196                 pdb_set_profile_path(sam_account,
 197                                      talloc_sub_specified((sam_account)->mem_ctx,
 198                                                             lp_logon_path(),
 199                                                             pwd->pw_name, global_myname(),
 200                                                             pwd->pw_uid, pwd->pw_gid),
 201                                      PDB_DEFAULT);
 202
 203                 pdb_set_homedir(sam_account,
 204                                 talloc_sub_specified((sam_account)->mem_ctx,
 205                                                        lp_logon_home(),
 206                                                        pwd->pw_name, global_myname(),
 207                                                        pwd->pw_uid, pwd->pw_gid),
 208                                 PDB_DEFAULT);
 209
 210                 pdb_set_dir_drive(sam_account,
 211                                   talloc_sub_specified((sam_account)->mem_ctx,
 212                                                          lp_logon_drive(),
 213                                                          pwd->pw_name, global_myname(),
 214                                                          pwd->pw_uid, pwd->pw_gid),
 215                                   PDB_DEFAULT);
 216
 217                 pdb_set_logon_script(sam_account,
 218                                      talloc_sub_specified((sam_account)->mem_ctx,
 219                                                             lp_logon_script(),
 220                                                             pwd->pw_name, global_myname(),
 221                                                             pwd->pw_uid, pwd->pw_gid),
 222                                      PDB_DEFAULT);
 223                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) {
 224                         DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name));
 225                         return NT_STATUS_UNSUCCESSFUL;
 226                 }
 227         } else {
 228                 if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) {
 229                         DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name));
 230                         return NT_STATUS_UNSUCCESSFUL;
 231                 }
 232         }
 233         return NT_STATUS_OK;
 234 }
 235
 236
 237 /*************************************************************
 238  Initialises a struct sam_passwd with sane values.
 239  ************************************************************/
 240
 241 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 242 {
 243         NTSTATUS nt_status;
 244
 245         if (!pwd) {
 246                 new_sam_acct = NULL;
 247                 return NT_STATUS_INVALID_PARAMETER;
 248         }
 249
 250         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 251                 new_sam_acct = NULL;
 252                 return nt_status;
 253         }
 254
 255         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 256                 pdb_free_sam(new_sam_acct);
 257                 new_sam_acct = NULL;
 258                 return nt_status;
 259         }
 260
 261         return NT_STATUS_OK;
 262 }
 263
 264
 265 /*************************************************************
 266  Initialises a SAM_ACCOUNT ready to add a new account, based
 267  on the unix user if possible.
 268  ************************************************************/
 269
 270 NTSTATUS pdb_init_sam_new(SAM_ACCOUNT **new_sam_acct, const char *username)
 271 {
 272         NTSTATUS nt_status = NT_STATUS_NO_MEMORY;
 273
 274         struct passwd *pwd;
 275
 276         pwd = Get_Pwnam(username);
 277
 278         if (pwd) {
 279                 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(new_sam_acct, pwd))) {
 280                         *new_sam_acct = NULL;
 281                         return nt_status;
 282                 }
 283         } else {
 284                 DOM_SID g_sid;
 285                 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 286                         *new_sam_acct = NULL;
 287                         return nt_status;
 288                 }
 289                 if (!pdb_set_username(*new_sam_acct, username, PDB_SET)) {
 290                         pdb_free_sam(new_sam_acct);
 291                         return nt_status;
 292                 }
 293
 294                 pdb_set_domain (*new_sam_acct, lp_workgroup(), PDB_DEFAULT);
 295
 296                 /* set Domain Users by default ! */
 297                 sid_copy(&g_sid, get_global_sam_sid());
 298                 sid_append_rid(&g_sid, DOMAIN_GROUP_RID_USERS);
 299                 pdb_set_group_sid(*new_sam_acct, &g_sid, PDB_SET);
 300         }
 301         return NT_STATUS_OK;
 302 }
 303
 304
 305 /**
 306  * Free the contets of the SAM_ACCOUNT, but not the structure.
 307  *
 308  * Also wipes the LM and NT hashes and plaintext password from
 309  * memory.
 310  *
 311  * @param user SAM_ACCOUNT to free members of.
 312  **/
 313
 314 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 315 {
 316
 317         /* Kill off sensitive data.  Free()ed by the
 318            talloc mechinism */
 319
 320         data_blob_clear_free(&(user->private.lm_pw));
 321         data_blob_clear_free(&(user->private.nt_pw));
 322         if (user->private.plaintext_pw!=NULL)
 323                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 324 }
 325
 326
 327 /************************************************************
 328  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 329  ***********************************************************/
 330
 331 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 332 {
 333         if (user == NULL) {
 334                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 335 #if 0
 336                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 337 #endif
 338                 return NT_STATUS_UNSUCCESSFUL;
 339         }
 340
 341         pdb_free_sam_contents(user);
 342
 343         pdb_fill_default_sam(user);
 344
 345         return NT_STATUS_OK;
 346 }
 347
 348
 349 /************************************************************
 350  Free the SAM_ACCOUNT and the member pointers.
 351  ***********************************************************/
 352
 353 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 354 {
 355         if (*user == NULL) {
 356                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 357 #if 0
 358                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 359 #endif
 360                 return NT_STATUS_UNSUCCESSFUL;
 361         }
 362
 363         pdb_free_sam_contents(*user);
 364
 365         if ((*user)->free_fn) {
 366                 (*user)->free_fn(user);
 367         }
 368
 369         return NT_STATUS_OK;
 370 }
 371
 372 /**************************************************************************
 373  * This function will take care of all the steps needed to correctly
 374  * allocate and set the user SID, please do use this function to create new
 375  * users, messing with SIDs is not good.
 376  *
 377  * account_data must be provided initialized, pwd may be null.
 378  *                                                                      SSS
 379  ***************************************************************************/
 380
 381 NTSTATUS pdb_set_sam_sids(SAM_ACCOUNT *account_data, const struct passwd *pwd)
 382 {
 383         const char *guest_account = lp_guestaccount();
 384         GROUP_MAP map;
 385
 386         if (!account_data || !pwd) {
 387                 return NT_STATUS_INVALID_PARAMETER;
 388         }
 389
 390         /* this is a hack this thing should not be set
 391            this way --SSS */
 392         if (!(guest_account && *guest_account)) {
 393                 DEBUG(1, ("NULL guest account!?!?\n"));
 394                 return NT_STATUS_UNSUCCESSFUL;
 395         } else {
 396                 /* Ensure this *must* be set right */
 397                 if (strcmp(pwd->pw_name, guest_account) == 0) {
 398                         if (!pdb_set_user_sid_from_rid(account_data, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) {
 399                                 return NT_STATUS_UNSUCCESSFUL;
 400                         }
 401                         if (!pdb_set_group_sid_from_rid(account_data, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) {
 402                                 return NT_STATUS_UNSUCCESSFUL;
 403                         }
 404                         return NT_STATUS_OK;
 405                 }
 406         }
 407
 408         if (!pdb_set_user_sid_from_rid(account_data, fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 409                 DEBUG(0,("Can't set User SID from RID!\n"));
 410                 return NT_STATUS_INVALID_PARAMETER;
 411         }
 412
 413         /* call the mapping code here */
 414         if(pdb_getgrgid(&map, pwd->pw_gid, MAPPING_WITHOUT_PRIV)) {
 415                 if (!pdb_set_group_sid(account_data, &map.sid, PDB_SET)){
 416                         DEBUG(0,("Can't set Group SID!\n"));
 417                         return NT_STATUS_INVALID_PARAMETER;
 418                 }
 419         }
 420         else {
 421                 if (!pdb_set_group_sid_from_rid(account_data, pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 422                         DEBUG(0,("Can't set Group SID\n"));
 423                         return NT_STATUS_INVALID_PARAMETER;
 424                 }
 425         }
 426
 427         return NT_STATUS_OK;
 428 }
 429
 430 /**********************************************************
 431  Encode the account control bits into a string.
 432  length = length of string to encode into (including terminating
 433  null). length *MUST BE MORE THAN 2* !
 434  **********************************************************/
 435
 436 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 437 {
 438         static fstring acct_str;
 439         size_t i = 0;
 440
 441         acct_str[i++] = '[';
 442
 443         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 444         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 445         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 446         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 447         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 448         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 449         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 450         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 451         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 452         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 453         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 454
 455         for ( ; i < length - 2 ; i++ )
 456                 acct_str[i] = ' ';
 457
 458         i = length - 2;
 459         acct_str[i++] = ']';
 460         acct_str[i++] = '\0';
 461
 462         return acct_str;
 463 }
 464
 465 /**********************************************************
 466  Decode the account control bits from a string.
 467  **********************************************************/
 468
 469 uint16 pdb_decode_acct_ctrl(const char *p)
 470 {
 471         uint16 acct_ctrl = 0;
 472         BOOL finished = False;
 473
 474         /*
 475          * Check if the account type bits have been encoded after the
 476          * NT password (in the form [NDHTUWSLXI]).
 477          */
 478
 479         if (*p != '[')
 480                 return 0;
 481
 482         for (p++; *p && !finished; p++) {
 483                 switch (*p) {
 484                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 485                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 486                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 487                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 488                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 489                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 490                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 491                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 492                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 493                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 494                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 495             case ' ': { break; }
 496                         case ':':
 497                         case '\n':
 498                         case '\0':
 499                         case ']':
 500                         default:  { finished = True; }
 501                 }
 502         }
 503
 504         return acct_ctrl;
 505 }
 506
 507 /*************************************************************
 508  Routine to set 32 hex password characters from a 16 byte array.
 509 **************************************************************/
 510
 511 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 512 {
 513         if (pwd != NULL) {
 514                 int i;
 515                 for (i = 0; i < 16; i++)
 516                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 517         } else {
 518                 if (acct_ctrl & ACB_PWNOTREQ)
 519                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 520                 else
 521                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 522         }
 523 }
 524
 525 /*************************************************************
 526  Routine to get the 32 hex characters and turn them
 527  into a 16 byte array.
 528 **************************************************************/
 529
 530 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 531 {
 532         int i;
 533         unsigned char   lonybble, hinybble;
 534         const char      *hexchars = "0123456789ABCDEF";
 535         char           *p1, *p2;
 536
 537         if (!p)
 538                 return (False);
 539
 540         for (i = 0; i < 32; i += 2) {
 541                 hinybble = toupper(p[i]);
 542                 lonybble = toupper(p[i + 1]);
 543
 544                 p1 = strchr(hexchars, hinybble);
 545                 p2 = strchr(hexchars, lonybble);
 546
 547                 if (!p1 || !p2)
 548                         return (False);
 549
 550                 hinybble = PTR_DIFF(p1, hexchars);
 551                 lonybble = PTR_DIFF(p2, hexchars);
 552
 553                 pwd[i / 2] = (hinybble << 4) | lonybble;
 554         }
 555         return (True);
 556 }
 557
 558 static int algorithmic_rid_base(void)
 559 {
 560         static int rid_offset = 0;
 561
 562         if (rid_offset != 0)
 563                 return rid_offset;
 564
 565         rid_offset = lp_algorithmic_rid_base();
 566
 567         if (rid_offset < BASE_RID) {
 568                 /* Try to prevent admin foot-shooting, we can't put algorithmic
 569                    rids below 1000, that's the 'well known RIDs' on NT */
 570                 DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID));
 571                 rid_offset = BASE_RID;
 572         }
 573         if (rid_offset & 1) {
 574                 DEBUG(0, ("algorithmic rid base must be even\n"));
 575                 rid_offset += 1;
 576         }
 577         return rid_offset;
 578 }
 579
 580 /*******************************************************************
 581  Converts NT user RID to a UNIX uid.
 582  ********************************************************************/
 583
 584 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 585 {
 586         int rid_offset = algorithmic_rid_base();
 587         return (uid_t)(((user_rid & (~USER_RID_TYPE)) - rid_offset)/RID_MULTIPLIER);
 588 }
 589
 590 /*******************************************************************
 591  converts UNIX uid to an NT User RID.
 592  ********************************************************************/
 593
 594 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 595 {
 596         int rid_offset = algorithmic_rid_base();
 597         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 598 }
 599
 600 /*******************************************************************
 601  Converts NT group RID to a UNIX gid.
 602  ********************************************************************/
 603
 604 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 605 {
 606         int rid_offset = algorithmic_rid_base();
 607         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 608 }
 609
 610 /*******************************************************************
 611  converts NT Group RID to a UNIX uid.
 612
 613  warning: you must not call that function only
 614  you must do a call to the group mapping first.
 615  there is not anymore a direct link between the gid and the rid.
 616  ********************************************************************/
 617
 618 uint32 pdb_gid_to_group_rid(gid_t gid)
 619 {
 620         int rid_offset = algorithmic_rid_base();
 621         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 622 }
 623
 624 /*******************************************************************
 625  Decides if a RID is a well known RID.
 626  ********************************************************************/
 627
 628 static BOOL pdb_rid_is_well_known(uint32 rid)
 629 {
 630         /* Not using rid_offset here, because this is the actual
 631            NT fixed value (1000) */
 632
 633         return (rid < BASE_RID);
 634 }
 635
 636 /*******************************************************************
 637  Decides if a RID is a user or group RID.
 638  ********************************************************************/
 639
 640 BOOL fallback_pdb_rid_is_user(uint32 rid)
 641 {
 642   /* lkcl i understand that NT attaches an enumeration to a RID
 643    * such that it can be identified as either a user, group etc
 644    * type.  there are 5 such categories, and they are documented.
 645    */
 646         /* However, they are not in the RID, just somthing you can query
 647            seperatly.  Sorry luke :-) */
 648
 649    if(pdb_rid_is_well_known(rid)) {
 650       /*
 651        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 652        * and DOMAIN_USER_RID_GUEST.
 653        */
 654      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 655        return True;
 656    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 657      return True;
 658    }
 659    return False;
 660 }
 661
 662 /*******************************************************************
 663  Convert a rid into a name. Used in the lookup SID rpc.
 664  ********************************************************************/
 665
 666 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 667 {
 668         uint32 rid;
 669         SAM_ACCOUNT *sam_account = NULL;
 670         GROUP_MAP map;
 671
 672         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 673                 DEBUG(0,("local_lookup_sid: sid_peek_check_rid return False! SID: %s\n",
 674                         sid_string_static(&map.sid)));
 675                 return False;
 676         }
 677         *psid_name_use = SID_NAME_UNKNOWN;
 678
 679         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 680
 681         if (rid == DOMAIN_USER_RID_ADMIN) {
 682                 const char **admin_list = lp_admin_users(-1);
 683                 *psid_name_use = SID_NAME_USER;
 684                 if (admin_list) {
 685                         const char *p = *admin_list;
 686                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 687                                 fstrcpy(name, "Administrator");
 688                 } else {
 689                         fstrcpy(name, "Administrator");
 690                 }
 691                 return True;
 692         }
 693
 694         /*
 695          * Don't try to convert the rid to a name if
 696          * running in appliance mode
 697          */
 698
 699         if (lp_hide_local_users())
 700                 return False;
 701
 702         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 703                 return False;
 704         }
 705
 706         /* see if the passdb can help us with the name of the user */
 707         if (pdb_getsampwsid(sam_account, sid)) {
 708                 fstrcpy(name, pdb_get_username(sam_account));
 709                 *psid_name_use = SID_NAME_USER;
 710
 711                 pdb_free_sam(&sam_account);
 712
 713                 return True;
 714         }
 715
 716         pdb_free_sam(&sam_account);
 717
 718         if (pdb_getgrsid(&map, *sid, MAPPING_WITHOUT_PRIV)) {
 719                 if (map.gid!=(gid_t)-1) {
 720                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 721                 } else {
 722                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 723                 }
 724
 725                 fstrcpy(name, map.nt_name);
 726                 *psid_name_use = map.sid_name_use;
 727                 return True;
 728         }
 729
 730         if (fallback_pdb_rid_is_user(rid)) {
 731                 uid_t uid;
 732
 733                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 734
 735                 uid = fallback_pdb_user_rid_to_uid(rid);
 736                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 737
 738                 return False;  /* Indicates that this user was 'not mapped' */
 739         } else {
 740                 gid_t gid;
 741                 struct group *gr;
 742
 743                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 744
 745                 gid = pdb_group_rid_to_gid(rid);
 746                 gr = getgrgid(gid);
 747
 748                 *psid_name_use = SID_NAME_ALIAS;
 749
 750                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 751                          gr ? "succeeded" : "failed" ));
 752
 753                 if(!gr) {
 754                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 755                         return False; /* Indicates that this group was 'not mapped' */
 756                 }
 757
 758                 fstrcpy( name, gr->gr_name);
 759
 760                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 761                          (unsigned int)rid ));
 762                 return True;
 763         }
 764 }
 765
 766 /*******************************************************************
 767  Convert a name into a SID. Used in the lookup name rpc.
 768  ********************************************************************/
 769
 770 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 771 {
 772         extern DOM_SID global_sid_World_Domain;
 773         DOM_SID local_sid;
 774         fstring user;
 775         SAM_ACCOUNT *sam_account = NULL;
 776         struct group *grp;
 777         GROUP_MAP map;
 778
 779         *psid_name_use = SID_NAME_UNKNOWN;
 780
 781         /*
 782          * user may be quoted a const string, and map_username and
 783          * friends can modify it. Make a modifiable copy. JRA.
 784          */
 785
 786         fstrcpy(user, c_user);
 787
 788         sid_copy(&local_sid, get_global_sam_sid());
 789
 790         /*
 791          * Special case for MACHINE\Everyone. Map to the world_sid.
 792          */
 793
 794         if(strequal(user, "Everyone")) {
 795                 sid_copy( psid, &global_sid_World_Domain);
 796                 sid_append_rid(psid, 0);
 797                 *psid_name_use = SID_NAME_ALIAS;
 798                 return True;
 799         }
 800
 801         /*
 802          * Don't lookup local unix users if running in appliance mode
 803          */
 804         if (lp_hide_local_users())
 805                 return False;
 806
 807         (void)map_username(user);
 808
 809         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 810                 return False;
 811         }
 812
 813         if (pdb_getsampwnam(sam_account, user)) {
 814                 sid_copy(psid, pdb_get_user_sid(sam_account));
 815                 *psid_name_use = SID_NAME_USER;
 816
 817                 pdb_free_sam(&sam_account);
 818                 return True;
 819         }
 820
 821         pdb_free_sam(&sam_account);
 822
 823         /*
 824          * Maybe it was a group ?
 825          */
 826
 827         /* check if it's a mapped group */
 828         if (pdb_getgrnam(&map, user, MAPPING_WITHOUT_PRIV)) {
 829                 /* yes it's a mapped group */
 830                 sid_copy(&local_sid, &map.sid);
 831                 *psid_name_use = map.sid_name_use;
 832         } else {
 833                 /* it's not a mapped group */
 834                 grp = getgrnam(user);
 835                 if(!grp)
 836                         return False;
 837
 838                 /*
 839                  *check if it's mapped, if it is reply it doesn't exist
 840                  *
 841                  * that's to prevent this case:
 842                  *
 843                  * unix group ug is mapped to nt group ng
 844                  * someone does a lookup on ug
 845                  * we must not reply as it doesn't "exist" anymore
 846                  * for NT. For NT only ng exists.
 847                  * JFM, 30/11/2001
 848                  */
 849
 850                 if (pdb_getgrgid(&map, grp->gr_gid, MAPPING_WITHOUT_PRIV)){
 851                         return False;
 852                 }
 853
 854                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 855                 *psid_name_use = SID_NAME_ALIAS;
 856         }
 857
 858         sid_copy( psid, &local_sid);
 859
 860         return True;
 861 }
 862
 863 /*************************************************************
 864  Change a password entry in the local smbpasswd file.
 865
 866 It is currently being called by SWAT and by smbpasswd.
 867
 868  --jerry
 869  *************************************************************/
 870
 871 BOOL local_password_change(const char *user_name, int local_flags,
 872                            const char *new_passwd,
 873                            char *err_str, size_t err_str_len,
 874                            char *msg_str, size_t msg_str_len)
 875 {
 876         SAM_ACCOUNT     *sam_pass=NULL;
 877         uint16 other_acb;
 878
 879         *err_str = '\0';
 880         *msg_str = '\0';
 881
 882         /* Get the smb passwd entry for this user */
 883         pdb_init_sam(&sam_pass);
 884         if(!pdb_getsampwnam(sam_pass, user_name)) {
 885                 pdb_free_sam(&sam_pass);
 886
 887                 if ((local_flags & LOCAL_ADD_USER) || (local_flags & LOCAL_DELETE_USER)) {
 888                         /* Might not exist in /etc/passwd */
 889                         if (!NT_STATUS_IS_OK(pdb_init_sam_new(&sam_pass, user_name))) {
 890                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
 891                                 return False;
 892                         }
 893                 } else {
 894                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
 895                         return False;
 896                 }
 897         } else {
 898                 /* the entry already existed */
 899                 local_flags &= ~LOCAL_ADD_USER;
 900         }
 901
 902         /* the 'other' acb bits not being changed here */
 903         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
 904         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 905                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
 906                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
 907                         pdb_free_sam(&sam_pass);
 908                         return False;
 909                 }
 910         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 911                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
 912                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
 913                         pdb_free_sam(&sam_pass);
 914                         return False;
 915                 }
 916         } else {
 917                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
 918                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
 919                         pdb_free_sam(&sam_pass);
 920                         return False;
 921                 }
 922         }
 923
 924         /*
 925          * We are root - just write the new password
 926          * and the valid last change time.
 927          */
 928
 929         if (local_flags & LOCAL_DISABLE_USER) {
 930                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
 931                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
 932                         pdb_free_sam(&sam_pass);
 933                         return False;
 934                 }
 935         } else if (local_flags & LOCAL_ENABLE_USER) {
 936                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 937                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 938                         pdb_free_sam(&sam_pass);
 939                         return False;
 940                 }
 941         }
 942
 943         if (local_flags & LOCAL_SET_NO_PASSWORD) {
 944                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
 945                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
 946                         pdb_free_sam(&sam_pass);
 947                         return False;
 948                 }
 949         } else if (local_flags & LOCAL_SET_PASSWORD) {
 950                 /*
 951                  * If we're dealing with setting a completely empty user account
 952                  * ie. One with a password of 'XXXX', but not set disabled (like
 953                  * an account created from scratch) then if the old password was
 954                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
 955                  * We remove that as we're giving this user their first password
 956                  * and the decision hasn't really been made to disable them (ie.
 957                  * don't create them disabled). JRA.
 958                  */
 959                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
 960                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 961                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 962                                 pdb_free_sam(&sam_pass);
 963                                 return False;
 964                         }
 965                 }
 966                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
 967                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
 968                         pdb_free_sam(&sam_pass);
 969                         return False;
 970                 }
 971
 972                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
 973                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
 974                         pdb_free_sam(&sam_pass);
 975                         return False;
 976                 }
 977         }
 978
 979         if (local_flags & LOCAL_ADD_USER) {
 980                 if (pdb_add_sam_account(sam_pass)) {
 981                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
 982                         pdb_free_sam(&sam_pass);
 983                         return True;
 984                 } else {
 985                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
 986                         pdb_free_sam(&sam_pass);
 987                         return False;
 988                 }
 989         } else if (local_flags & LOCAL_DELETE_USER) {
 990                 if (!pdb_delete_sam_account(sam_pass)) {
 991                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
 992                         pdb_free_sam(&sam_pass);
 993                         return False;
 994                 }
 995                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
 996         } else {
 997                 if(!pdb_update_sam_account(sam_pass)) {
 998                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
 999                         pdb_free_sam(&sam_pass);
1000                         return False;
1001                 }
1002                 if(local_flags & LOCAL_DISABLE_USER)
1003                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1004                 else if (local_flags & LOCAL_ENABLE_USER)
1005                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1006                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1007                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1008         }
1009
1010         pdb_free_sam(&sam_pass);
1011         return True;
1012 }