source3/passdb/passdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Jeremy Allison                 1996-2001
   5    Copyright (C) Luke Kenneth Casson Leighton   1996-1998
   6    Copyright (C) Gerald (Jerry) Carter          2000-2001
   7    Copyright (C) Andrew Bartlett                2001-2002
   8    Copyright (C) Simo Sorce                     2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_PASSDB
  29
  30 /******************************************************************
  31  get the default domain/netbios name to be used when
  32  testing authentication.  For example, if you connect
  33  to a Windows member server using a bogus domain name, the
  34  Windows box will map the BOGUS\user to DOMAIN\user.  A
  35  standalone box will map to WKS\user.
  36 ******************************************************************/
  37
  38 const char *get_default_sam_name(void)
  39 {
  40         /* standalone servers can only use the local netbios name */
  41         if ( lp_server_role() == ROLE_STANDALONE )
  42                 return global_myname();
  43
  44         /* Windows domain members default to the DOMAIN
  45            name when not specified */
  46         return lp_workgroup();
  47 }
  48
  49 /******************************************************************
  50  get the default domain/netbios name to be used when dealing
  51  with our passdb list of accounts
  52 ******************************************************************/
  53
  54 const char *get_global_sam_name(void)
  55 {
  56         if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
  57                 return lp_workgroup();
  58         }
  59         return global_myname();
  60 }
  61
  62 /************************************************************
  63  Fill the SAM_ACCOUNT with default values.
  64  ***********************************************************/
  65
  66 void pdb_fill_default_sam(SAM_ACCOUNT *user)
  67 {
  68         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  69
  70         /* no initial methods */
  71         user->methods = NULL;
  72
  73         /* Don't change these timestamp settings without a good reason.
  74            They are important for NT member server compatibility. */
  75
  76         user->private.logon_time            = (time_t)0;
  77         user->private.pass_last_set_time    = (time_t)0;
  78         user->private.pass_can_change_time  = (time_t)0;
  79         user->private.logoff_time           =
  80         user->private.kickoff_time          =
  81         user->private.pass_must_change_time = get_time_t_max();
  82         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  83         user->private.logon_divs = 168;         /* hours per week */
  84         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  85         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  86         user->private.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 if possible.
 294  ************************************************************/
 295
 296 NTSTATUS pdb_init_sam_new(SAM_ACCOUNT **new_sam_acct, const char *username)
 297 {
 298         NTSTATUS nt_status = NT_STATUS_NO_MEMORY;
 299
 300         struct passwd *pwd;
 301
 302         pwd = Get_Pwnam(username);
 303
 304         if (pwd) {
 305                 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(new_sam_acct, pwd))) {
 306                         *new_sam_acct = NULL;
 307                         return nt_status;
 308                 }
 309         } else {
 310                 DOM_SID g_sid;
 311                 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 312                         *new_sam_acct = NULL;
 313                         return nt_status;
 314                 }
 315                 if (!pdb_set_username(*new_sam_acct, username, PDB_SET)) {
 316                         pdb_free_sam(new_sam_acct);
 317                         return nt_status;
 318                 }
 319
 320                 pdb_set_domain (*new_sam_acct, get_global_sam_name(), PDB_DEFAULT);
 321
 322                 /* set Domain Users by default ! */
 323                 sid_copy(&g_sid, get_global_sam_sid());
 324                 sid_append_rid(&g_sid, DOMAIN_GROUP_RID_USERS);
 325                 pdb_set_group_sid(*new_sam_acct, &g_sid, PDB_SET);
 326         }
 327         return NT_STATUS_OK;
 328 }
 329
 330
 331 /**
 332  * Free the contets of the SAM_ACCOUNT, but not the structure.
 333  *
 334  * Also wipes the LM and NT hashes and plaintext password from
 335  * memory.
 336  *
 337  * @param user SAM_ACCOUNT to free members of.
 338  **/
 339
 340 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 341 {
 342
 343         /* Kill off sensitive data.  Free()ed by the
 344            talloc mechinism */
 345
 346         data_blob_clear_free(&(user->private.lm_pw));
 347         data_blob_clear_free(&(user->private.nt_pw));
 348         if (user->private.plaintext_pw!=NULL)
 349                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 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 static 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         if (pdb_getsampwsid(sam_account, sid)) {
 734                 fstrcpy(name, pdb_get_username(sam_account));
 735                 *psid_name_use = SID_NAME_USER;
 736
 737                 pdb_free_sam(&sam_account);
 738
 739                 return True;
 740         }
 741
 742         pdb_free_sam(&sam_account);
 743
 744         if (pdb_getgrsid(&map, *sid)) {
 745                 if (map.gid!=(gid_t)-1) {
 746                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 747                 } else {
 748                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 749                 }
 750
 751                 fstrcpy(name, map.nt_name);
 752                 *psid_name_use = map.sid_name_use;
 753                 return True;
 754         }
 755
 756         if (fallback_pdb_rid_is_user(rid)) {
 757                 uid_t uid;
 758
 759                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 760
 761                 uid = fallback_pdb_user_rid_to_uid(rid);
 762                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 763
 764                 return False;  /* Indicates that this user was 'not mapped' */
 765         } else {
 766                 gid_t gid;
 767                 struct group *gr;
 768
 769                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 770
 771                 gid = pdb_group_rid_to_gid(rid);
 772                 gr = getgrgid(gid);
 773
 774                 *psid_name_use = SID_NAME_ALIAS;
 775
 776                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 777                          gr ? "succeeded" : "failed" ));
 778
 779                 if(!gr) {
 780                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 781                         return False; /* Indicates that this group was 'not mapped' */
 782                 }
 783
 784                 fstrcpy( name, gr->gr_name);
 785
 786                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 787                          (unsigned int)rid ));
 788                 return True;
 789         }
 790 }
 791
 792 /*******************************************************************
 793  Convert a name into a SID. Used in the lookup name rpc.
 794  ********************************************************************/
 795
 796 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 797 {
 798         extern DOM_SID global_sid_World_Domain;
 799         DOM_SID local_sid;
 800         fstring user;
 801         SAM_ACCOUNT *sam_account = NULL;
 802         struct group *grp;
 803         GROUP_MAP map;
 804
 805         *psid_name_use = SID_NAME_UNKNOWN;
 806
 807         /*
 808          * user may be quoted a const string, and map_username and
 809          * friends can modify it. Make a modifiable copy. JRA.
 810          */
 811
 812         fstrcpy(user, c_user);
 813
 814         sid_copy(&local_sid, get_global_sam_sid());
 815
 816         /*
 817          * Special case for MACHINE\Everyone. Map to the world_sid.
 818          */
 819
 820         if(strequal(user, "Everyone")) {
 821                 sid_copy( psid, &global_sid_World_Domain);
 822                 sid_append_rid(psid, 0);
 823                 *psid_name_use = SID_NAME_ALIAS;
 824                 return True;
 825         }
 826
 827         /*
 828          * Don't lookup local unix users if running in appliance mode
 829          */
 830         if (lp_hide_local_users())
 831                 return False;
 832
 833         (void)map_username(user);
 834
 835         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 836                 return False;
 837         }
 838
 839         if (pdb_getsampwnam(sam_account, user)) {
 840                 sid_copy(psid, pdb_get_user_sid(sam_account));
 841                 *psid_name_use = SID_NAME_USER;
 842
 843                 pdb_free_sam(&sam_account);
 844                 return True;
 845         }
 846
 847         pdb_free_sam(&sam_account);
 848
 849         /*
 850          * Maybe it was a group ?
 851          */
 852
 853         /* check if it's a mapped group */
 854         if (pdb_getgrnam(&map, user)) {
 855                 /* yes it's a mapped group */
 856                 sid_copy(&local_sid, &map.sid);
 857                 *psid_name_use = map.sid_name_use;
 858         } else {
 859                 /* it's not a mapped group */
 860                 grp = getgrnam(user);
 861                 if(!grp)
 862                         return False;
 863
 864                 /*
 865                  *check if it's mapped, if it is reply it doesn't exist
 866                  *
 867                  * that's to prevent this case:
 868                  *
 869                  * unix group ug is mapped to nt group ng
 870                  * someone does a lookup on ug
 871                  * we must not reply as it doesn't "exist" anymore
 872                  * for NT. For NT only ng exists.
 873                  * JFM, 30/11/2001
 874                  */
 875
 876                 if (pdb_getgrgid(&map, grp->gr_gid)){
 877                         return False;
 878                 }
 879
 880                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 881                 *psid_name_use = SID_NAME_ALIAS;
 882         }
 883
 884         sid_copy( psid, &local_sid);
 885
 886         return True;
 887 }
 888
 889 /*************************************************************
 890  Change a password entry in the local smbpasswd file.
 891
 892 It is currently being called by SWAT and by smbpasswd.
 893
 894  --jerry
 895  *************************************************************/
 896
 897 BOOL local_password_change(const char *user_name, int local_flags,
 898                            const char *new_passwd,
 899                            char *err_str, size_t err_str_len,
 900                            char *msg_str, size_t msg_str_len)
 901 {
 902         SAM_ACCOUNT     *sam_pass=NULL;
 903         uint16 other_acb;
 904
 905         *err_str = '\0';
 906         *msg_str = '\0';
 907
 908         /* Get the smb passwd entry for this user */
 909         pdb_init_sam(&sam_pass);
 910         if(!pdb_getsampwnam(sam_pass, user_name)) {
 911                 pdb_free_sam(&sam_pass);
 912
 913                 if ((local_flags & LOCAL_ADD_USER) || (local_flags & LOCAL_DELETE_USER)) {
 914                         /* Might not exist in /etc/passwd */
 915                         if (!NT_STATUS_IS_OK(pdb_init_sam_new(&sam_pass, user_name))) {
 916                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
 917                                 return False;
 918                         }
 919                 } else {
 920                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
 921                         return False;
 922                 }
 923         } else {
 924                 /* the entry already existed */
 925                 local_flags &= ~LOCAL_ADD_USER;
 926         }
 927
 928         /* the 'other' acb bits not being changed here */
 929         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
 930         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 931                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
 932                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
 933                         pdb_free_sam(&sam_pass);
 934                         return False;
 935                 }
 936         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 937                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
 938                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
 939                         pdb_free_sam(&sam_pass);
 940                         return False;
 941                 }
 942         } else {
 943                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
 944                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
 945                         pdb_free_sam(&sam_pass);
 946                         return False;
 947                 }
 948         }
 949
 950         /*
 951          * We are root - just write the new password
 952          * and the valid last change time.
 953          */
 954
 955         if (local_flags & LOCAL_DISABLE_USER) {
 956                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
 957                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
 958                         pdb_free_sam(&sam_pass);
 959                         return False;
 960                 }
 961         } else if (local_flags & LOCAL_ENABLE_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 unset 'disabled' flag for user %s.\n", user_name);
 964                         pdb_free_sam(&sam_pass);
 965                         return False;
 966                 }
 967         }
 968
 969         if (local_flags & LOCAL_SET_NO_PASSWORD) {
 970                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
 971                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
 972                         pdb_free_sam(&sam_pass);
 973                         return False;
 974                 }
 975         } else if (local_flags & LOCAL_SET_PASSWORD) {
 976                 /*
 977                  * If we're dealing with setting a completely empty user account
 978                  * ie. One with a password of 'XXXX', but not set disabled (like
 979                  * an account created from scratch) then if the old password was
 980                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
 981                  * We remove that as we're giving this user their first password
 982                  * and the decision hasn't really been made to disable them (ie.
 983                  * don't create them disabled). JRA.
 984                  */
 985                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
 986                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
 987                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
 988                                 pdb_free_sam(&sam_pass);
 989                                 return False;
 990                         }
 991                 }
 992                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
 993                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
 994                         pdb_free_sam(&sam_pass);
 995                         return False;
 996                 }
 997
 998                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
 999                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1000                         pdb_free_sam(&sam_pass);
1001                         return False;
1002                 }
1003         }
1004
1005         if (local_flags & LOCAL_ADD_USER) {
1006                 if (pdb_add_sam_account(sam_pass)) {
1007                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1008                         pdb_free_sam(&sam_pass);
1009                         return True;
1010                 } else {
1011                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1012                         pdb_free_sam(&sam_pass);
1013                         return False;
1014                 }
1015         } else if (local_flags & LOCAL_DELETE_USER) {
1016                 if (!pdb_delete_sam_account(sam_pass)) {
1017                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1018                         pdb_free_sam(&sam_pass);
1019                         return False;
1020                 }
1021                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1022         } else {
1023                 if(!pdb_update_sam_account(sam_pass)) {
1024                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1025                         pdb_free_sam(&sam_pass);
1026                         return False;
1027                 }
1028                 if(local_flags & LOCAL_DISABLE_USER)
1029                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1030                 else if (local_flags & LOCAL_ENABLE_USER)
1031                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1032                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1033                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1034         }
1035
1036         pdb_free_sam(&sam_pass);
1037         return True;
1038 }