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
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_PASSDB
  28
  29 /*
  30  * This is set on startup - it defines the SID for this
  31  * machine, and therefore the SAM database for which it is
  32  * responsible.
  33  */
  34
  35 extern pstring global_myname;
  36
  37 /************************************************************
  38  Fill the SAM_ACCOUNT with default values.
  39  ***********************************************************/
  40
  41 static void pdb_fill_default_sam(SAM_ACCOUNT *user)
  42 {
  43         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  44
  45         /* Don't change these timestamp settings without a good reason.
  46            They are important for NT member server compatibility. */
  47
  48         user->private.init_flag             = FLAG_SAM_UNINIT;
  49         user->private.uid = user->private.gid       = -1;
  50
  51         user->private.logon_time            = (time_t)0;
  52         user->private.pass_last_set_time    = (time_t)0;
  53         user->private.pass_can_change_time  = (time_t)0;
  54         user->private.logoff_time           =
  55         user->private.kickoff_time          =
  56         user->private.pass_must_change_time = get_time_t_max();
  57         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  58         user->private.logon_divs = 168;         /* hours per week */
  59         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  60         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  61         user->private.unknown_5 = 0x00000000; /* don't know */
  62         user->private.unknown_6 = 0x000004ec; /* don't know */
  63
  64         /* Some parts of samba strlen their pdb_get...() returns,
  65            so this keeps the interface unchanged for now. */
  66
  67         user->private.username = "";
  68         user->private.domain = "";
  69         user->private.nt_username = "";
  70         user->private.full_name = "";
  71         user->private.home_dir = "";
  72         user->private.logon_script = "";
  73         user->private.profile_path = "";
  74         user->private.acct_desc = "";
  75         user->private.workstations = "";
  76         user->private.unknown_str = "";
  77         user->private.munged_dial = "";
  78 }
  79
  80 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
  81 {
  82         if (*user) {
  83                 talloc_destroy((*user)->mem_ctx);
  84                 *user = NULL;
  85         }
  86 }
  87
  88
  89 /**********************************************************************
  90  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
  91 ***********************************************************************/
  92
  93 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
  94 {
  95         if (*user != NULL) {
  96                 DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n"));
  97 #if 0
  98                 smb_panic("non-NULL pointer passed to pdb_init_sam\n");
  99 #endif
 100                 return NT_STATUS_UNSUCCESSFUL;
 101         }
 102
 103         if (!mem_ctx) {
 104                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 105                 return NT_STATUS_UNSUCCESSFUL;
 106         }
 107
 108         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 109
 110         if (*user==NULL) {
 111                 DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n"));
 112                 return NT_STATUS_NO_MEMORY;
 113         }
 114
 115         (*user)->mem_ctx = mem_ctx;
 116
 117         (*user)->free_fn = NULL;
 118
 119         pdb_fill_default_sam(*user);
 120
 121         return NT_STATUS_OK;
 122 }
 123
 124
 125 /*************************************************************
 126  Alloc memory and initialises a struct sam_passwd.
 127  ************************************************************/
 128
 129 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 130 {
 131         TALLOC_CTX *mem_ctx;
 132         NTSTATUS nt_status;
 133
 134         mem_ctx = talloc_init_named("passdb internal SAM_ACCOUNT allocation");
 135
 136         if (!mem_ctx) {
 137                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 138                 return NT_STATUS_NO_MEMORY;
 139         }
 140
 141         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 142                 talloc_destroy(mem_ctx);
 143                 return nt_status;
 144         }
 145
 146         (*user)->free_fn = destroy_pdb_talloc;
 147
 148         return NT_STATUS_OK;
 149 }
 150
 151
 152 /*************************************************************
 153  Initialises a struct sam_passwd with sane values.
 154  ************************************************************/
 155
 156 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 157 {
 158         GROUP_MAP map;
 159
 160         if (!pwd) {
 161                 return NT_STATUS_UNSUCCESSFUL;
 162         }
 163
 164         pdb_fill_default_sam(sam_account);
 165
 166         pdb_set_username(sam_account, pwd->pw_name);
 167         pdb_set_fullname(sam_account, pwd->pw_gecos);
 168
 169         pdb_set_unix_homedir(sam_account, pwd->pw_dir);
 170
 171         pdb_set_domain (sam_account, lp_workgroup());
 172
 173         pdb_set_uid(sam_account, pwd->pw_uid);
 174         pdb_set_gid(sam_account, pwd->pw_gid);
 175
 176         /* When we get a proper uid -> SID and SID -> uid allocation
 177            mechinism, we should call it here.
 178
 179            We can't just set this to 0 or allow it only to be filled
 180            in when added to the backend, becouse the user's SID
 181            may already be in security descriptors etc.
 182
 183            -- abartlet 11-May-02
 184         */
 185
 186         if (!pdb_set_user_sid_from_rid(sam_account,
 187                                        fallback_pdb_uid_to_user_rid(pwd->pw_uid))) {
 188                 DEBUG(0,("Can't set User SID from RID!\n"));
 189                 return NT_STATUS_INVALID_PARAMETER;
 190         }
 191
 192         /* call the mapping code here */
 193         if(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 194                 if (!pdb_set_group_sid(sam_account,&map.sid)){
 195                         DEBUG(0,("Can't set Group SID!\n"));
 196                         return NT_STATUS_INVALID_PARAMETER;
 197                 }
 198         }
 199         else {
 200                 if (!pdb_set_group_sid_from_rid(sam_account,pdb_gid_to_group_rid(pwd->pw_gid))) {
 201                         DEBUG(0,("Can't set Group SID\n"));
 202                         return NT_STATUS_INVALID_PARAMETER;
 203                 }
 204         }
 205
 206         /* check if this is a user account or a machine account */
 207         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 208         {
 209                 pdb_set_profile_path(sam_account,
 210                                      talloc_sub_specified((sam_account)->mem_ctx,
 211                                                             lp_logon_path(),
 212                                                             pwd->pw_name, global_myname,
 213                                                             pwd->pw_uid, pwd->pw_gid),
 214                                      False);
 215
 216                 pdb_set_homedir(sam_account,
 217                                 talloc_sub_specified((sam_account)->mem_ctx,
 218                                                        lp_logon_home(),
 219                                                        pwd->pw_name, global_myname,
 220                                                        pwd->pw_uid, pwd->pw_gid),
 221                                 False);
 222
 223                 pdb_set_dir_drive(sam_account,
 224                                   talloc_sub_specified((sam_account)->mem_ctx,
 225                                                          lp_logon_drive(),
 226                                                          pwd->pw_name, global_myname,
 227                                                          pwd->pw_uid, pwd->pw_gid),
 228                                   False);
 229
 230                 pdb_set_logon_script(sam_account,
 231                                      talloc_sub_specified((sam_account)->mem_ctx,
 232                                                             lp_logon_script(),
 233                                                             pwd->pw_name, global_myname,
 234                                                             pwd->pw_uid, pwd->pw_gid),
 235                                      False);
 236         }
 237         return NT_STATUS_OK;
 238 }
 239
 240
 241 /*************************************************************
 242  Initialises a struct sam_passwd with sane values.
 243  ************************************************************/
 244
 245 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 246 {
 247         NTSTATUS nt_status;
 248
 249         if (!pwd) {
 250                 new_sam_acct = NULL;
 251                 return NT_STATUS_UNSUCCESSFUL;
 252         }
 253
 254         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 255                 new_sam_acct = NULL;
 256                 return nt_status;
 257         }
 258
 259         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 260                 pdb_free_sam(new_sam_acct);
 261                 new_sam_acct = NULL;
 262                 return nt_status;
 263         }
 264
 265         return NT_STATUS_OK;
 266 }
 267
 268
 269 /**
 270  * Free the contets of the SAM_ACCOUNT, but not the structure.
 271  *
 272  * Also wipes the LM and NT hashes and plaintext passwrod from
 273  * memory.
 274  *
 275  * @param user SAM_ACCOUNT to free members of.
 276  **/
 277
 278 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 279 {
 280
 281         /* Kill off sensitive data.  Free()ed by the
 282            talloc mechinism */
 283
 284         data_blob_clear_free(&(user->private.lm_pw));
 285         data_blob_clear_free(&(user->private.nt_pw));
 286         data_blob_clear_free(&(user->private.plaintext_pw));
 287 }
 288
 289
 290 /************************************************************
 291  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 292  ***********************************************************/
 293
 294 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 295 {
 296         if (user == NULL) {
 297                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 298 #if 0
 299                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 300 #endif
 301                 return NT_STATUS_UNSUCCESSFUL;
 302         }
 303
 304         pdb_free_sam_contents(user);
 305
 306         pdb_fill_default_sam(user);
 307
 308         return NT_STATUS_OK;
 309 }
 310
 311
 312 /************************************************************
 313  Free the SAM_ACCOUNT and the member pointers.
 314  ***********************************************************/
 315
 316 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 317 {
 318         if (*user == NULL) {
 319                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 320 #if 0
 321                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 322 #endif
 323                 return NT_STATUS_UNSUCCESSFUL;
 324         }
 325
 326         pdb_free_sam_contents(*user);
 327
 328         if ((*user)->free_fn) {
 329                 (*user)->free_fn(user);
 330         }
 331
 332         return NT_STATUS_OK;
 333 }
 334
 335
 336 /**********************************************************
 337  Encode the account control bits into a string.
 338  length = length of string to encode into (including terminating
 339  null). length *MUST BE MORE THAN 2* !
 340  **********************************************************/
 341
 342 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 343 {
 344         static fstring acct_str;
 345         size_t i = 0;
 346
 347         acct_str[i++] = '[';
 348
 349         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 350         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 351         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 352         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 353         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 354         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 355         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 356         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 357         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 358         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 359         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 360
 361         for ( ; i < length - 2 ; i++ )
 362                 acct_str[i] = ' ';
 363
 364         i = length - 2;
 365         acct_str[i++] = ']';
 366         acct_str[i++] = '\0';
 367
 368         return acct_str;
 369 }
 370
 371 /**********************************************************
 372  Decode the account control bits from a string.
 373  **********************************************************/
 374
 375 uint16 pdb_decode_acct_ctrl(const char *p)
 376 {
 377         uint16 acct_ctrl = 0;
 378         BOOL finished = False;
 379
 380         /*
 381          * Check if the account type bits have been encoded after the
 382          * NT password (in the form [NDHTUWSLXI]).
 383          */
 384
 385         if (*p != '[')
 386                 return 0;
 387
 388         for (p++; *p && !finished; p++) {
 389                 switch (*p) {
 390                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 391                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 392                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 393                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 394                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 395                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 396                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 397                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 398                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 399                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 400                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 401             case ' ': { break; }
 402                         case ':':
 403                         case '\n':
 404                         case '\0':
 405                         case ']':
 406                         default:  { finished = True; }
 407                 }
 408         }
 409
 410         return acct_ctrl;
 411 }
 412
 413 /*************************************************************
 414  Routine to set 32 hex password characters from a 16 byte array.
 415 **************************************************************/
 416
 417 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 418 {
 419         if (pwd != NULL) {
 420                 int i;
 421                 for (i = 0; i < 16; i++)
 422                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 423         } else {
 424                 if (acct_ctrl & ACB_PWNOTREQ)
 425                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 426                 else
 427                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 428         }
 429 }
 430
 431 /*************************************************************
 432  Routine to get the 32 hex characters and turn them
 433  into a 16 byte array.
 434 **************************************************************/
 435
 436 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 437 {
 438         int i;
 439         unsigned char   lonybble, hinybble;
 440         char           *hexchars = "0123456789ABCDEF";
 441         char           *p1, *p2;
 442
 443         if (!p)
 444                 return (False);
 445
 446         for (i = 0; i < 32; i += 2) {
 447                 hinybble = toupper(p[i]);
 448                 lonybble = toupper(p[i + 1]);
 449
 450                 p1 = strchr(hexchars, hinybble);
 451                 p2 = strchr(hexchars, lonybble);
 452
 453                 if (!p1 || !p2)
 454                         return (False);
 455
 456                 hinybble = PTR_DIFF(p1, hexchars);
 457                 lonybble = PTR_DIFF(p2, hexchars);
 458
 459                 pwd[i / 2] = (hinybble << 4) | lonybble;
 460         }
 461         return (True);
 462 }
 463
 464 /*******************************************************************
 465  Converts NT user RID to a UNIX uid.
 466  ********************************************************************/
 467
 468 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 469 {
 470         int rid_offset = lp_algorithmic_rid_base();
 471         return (uid_t)(((user_rid & (~USER_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 472 }
 473
 474
 475 /*******************************************************************
 476  converts UNIX uid to an NT User RID.
 477  ********************************************************************/
 478
 479 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 480 {
 481         int rid_offset = lp_algorithmic_rid_base();
 482         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 483 }
 484
 485 /*******************************************************************
 486  Converts NT group RID to a UNIX gid.
 487  ********************************************************************/
 488
 489 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 490 {
 491         int rid_offset = lp_algorithmic_rid_base();
 492         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 493 }
 494
 495 /*******************************************************************
 496  converts NT Group RID to a UNIX uid.
 497
 498  warning: you must not call that function only
 499  you must do a call to the group mapping first.
 500  there is not anymore a direct link between the gid and the rid.
 501  ********************************************************************/
 502
 503 uint32 pdb_gid_to_group_rid(gid_t gid)
 504 {
 505         int rid_offset = lp_algorithmic_rid_base();
 506         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 507 }
 508
 509 /*******************************************************************
 510  Decides if a RID is a well known RID.
 511  ********************************************************************/
 512
 513 static BOOL pdb_rid_is_well_known(uint32 rid)
 514 {
 515         /* Not using rid_offset here, becouse this is the actual
 516            NT fixed value (1000) */
 517
 518         return (rid < BASE_RID);
 519 }
 520
 521 /*******************************************************************
 522  Decides if a RID is a user or group RID.
 523  ********************************************************************/
 524
 525 BOOL pdb_rid_is_user(uint32 rid)
 526 {
 527   /* lkcl i understand that NT attaches an enumeration to a RID
 528    * such that it can be identified as either a user, group etc
 529    * type.  there are 5 such categories, and they are documented.
 530    */
 531         /* However, they are not in the RID, just somthing you can query
 532            seperatly.  Sorry luke :-) */
 533
 534    if(pdb_rid_is_well_known(rid)) {
 535       /*
 536        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 537        * and DOMAIN_USER_RID_GUEST.
 538        */
 539      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 540        return True;
 541    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 542      return True;
 543    }
 544    return False;
 545 }
 546
 547 /*******************************************************************
 548  Convert a rid into a name. Used in the lookup SID rpc.
 549  ********************************************************************/
 550
 551 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 552 {
 553         uint32 rid;
 554         SAM_ACCOUNT *sam_account = NULL;
 555         GROUP_MAP map;
 556
 557         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 558                 DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 559                         sid_string_static(&map.sid)));
 560                 return False;
 561         }
 562         *psid_name_use = SID_NAME_UNKNOWN;
 563
 564         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 565
 566         if (rid == DOMAIN_USER_RID_ADMIN) {
 567                 char **admin_list = lp_admin_users(-1);
 568                 *psid_name_use = SID_NAME_USER;
 569                 if (admin_list) {
 570                         char *p = *admin_list;
 571                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 572                                 fstrcpy(name, "Administrator");
 573                 } else {
 574                         fstrcpy(name, "Administrator");
 575                 }
 576                 return True;
 577
 578         } else if (rid == DOMAIN_USER_RID_GUEST) {
 579                 char *p = lp_guestaccount();
 580                 *psid_name_use = SID_NAME_USER;
 581                 if(!next_token(&p, name, NULL, sizeof(fstring)))
 582                         fstrcpy(name, "Guest");
 583                 return True;
 584
 585         }
 586
 587         /*
 588          * Don't try to convert the rid to a name if
 589          * running in appliance mode
 590          */
 591
 592         if (lp_hide_local_users())
 593                 return False;
 594
 595         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 596                 return False;
 597         }
 598
 599         /* This now does the 'generic' mapping in pdb_unix */
 600         if (pdb_getsampwsid(sam_account, sid)) {
 601                 fstrcpy(name, pdb_get_username(sam_account));
 602                 *psid_name_use = SID_NAME_USER;
 603
 604                 pdb_free_sam(&sam_account);
 605
 606                 return True;
 607         }
 608
 609         pdb_free_sam(&sam_account);
 610
 611         if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 612                 if (map.gid!=-1) {
 613                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 614                 } else {
 615                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 616                 }
 617
 618                 fstrcpy(name, map.nt_name);
 619                 *psid_name_use = map.sid_name_use;
 620                 return True;
 621         }
 622
 623         if (pdb_rid_is_user(rid)) {
 624                 uid_t uid;
 625
 626                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 627
 628                 uid = fallback_pdb_user_rid_to_uid(rid);
 629                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 630
 631                 return False;  /* Indicates that this user was 'not mapped' */
 632         } else {
 633                 gid_t gid;
 634                 struct group *gr;
 635
 636                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 637
 638                 gid = pdb_group_rid_to_gid(rid);
 639                 gr = getgrgid(gid);
 640
 641                 *psid_name_use = SID_NAME_ALIAS;
 642
 643                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 644                          gr ? "succeeded" : "failed" ));
 645
 646                 if(!gr) {
 647                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 648                         return False; /* Indicates that this group was 'not mapped' */
 649                 }
 650
 651                 fstrcpy( name, gr->gr_name);
 652
 653                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 654                          (unsigned int)rid ));
 655                 return True;
 656         }
 657 }
 658
 659 /*******************************************************************
 660  Convert a name into a SID. Used in the lookup name rpc.
 661  ********************************************************************/
 662
 663 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 664 {
 665         extern DOM_SID global_sid_World_Domain;
 666         DOM_SID local_sid;
 667         fstring user;
 668         SAM_ACCOUNT *sam_account = NULL;
 669         struct group *grp;
 670         GROUP_MAP map;
 671
 672         *psid_name_use = SID_NAME_UNKNOWN;
 673
 674         /*
 675          * user may be quoted a const string, and map_username and
 676          * friends can modify it. Make a modifiable copy. JRA.
 677          */
 678
 679         fstrcpy(user, c_user);
 680
 681         sid_copy(&local_sid, get_global_sam_sid());
 682
 683         /*
 684          * Special case for MACHINE\Everyone. Map to the world_sid.
 685          */
 686
 687         if(strequal(user, "Everyone")) {
 688                 sid_copy( psid, &global_sid_World_Domain);
 689                 sid_append_rid(psid, 0);
 690                 *psid_name_use = SID_NAME_ALIAS;
 691                 return True;
 692         }
 693
 694         /*
 695          * Don't lookup local unix users if running in appliance mode
 696          */
 697         if (lp_hide_local_users())
 698                 return False;
 699
 700         (void)map_username(user);
 701
 702         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 703                 return False;
 704         }
 705
 706         if (pdb_getsampwnam(sam_account, user)) {
 707                 sid_copy(psid, pdb_get_user_sid(sam_account));
 708                 *psid_name_use = SID_NAME_USER;
 709
 710                 pdb_free_sam(&sam_account);
 711                 return True;
 712         }
 713
 714         pdb_free_sam(&sam_account);
 715
 716         /*
 717          * Maybe it was a group ?
 718          */
 719
 720         /* check if it's a mapped group */
 721         if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 722                 if (map.gid!=-1) {
 723                         /* yes it's a mapped group to a valid unix group */
 724                         sid_copy(&local_sid, &map.sid);
 725                         *psid_name_use = map.sid_name_use;
 726                 }
 727                 else {
 728                         /* it's a correct name but not mapped so it points to nothing*/
 729                         return False;
 730                 }
 731         } else {
 732                 /* it's not a mapped group */
 733                 grp = getgrnam(user);
 734                 if(!grp)
 735                         return False;
 736
 737                 /*
 738                  *check if it's mapped, if it is reply it doesn't exist
 739                  *
 740                  * that's to prevent this case:
 741                  *
 742                  * unix group ug is mapped to nt group ng
 743                  * someone does a lookup on ug
 744                  * we must not reply as it doesn't "exist" anymore
 745                  * for NT. For NT only ng exists.
 746                  * JFM, 30/11/2001
 747                  */
 748
 749                 if (get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 750                         return False;
 751                 }
 752
 753                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 754                 *psid_name_use = SID_NAME_ALIAS;
 755         }
 756
 757         sid_copy( psid, &local_sid);
 758
 759         return True;
 760 }
 761
 762 /****************************************************************************
 763  Convert a uid to SID - locally.
 764 ****************************************************************************/
 765
 766 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 767 {
 768         struct passwd *pass;
 769         SAM_ACCOUNT *sam_user = NULL;
 770         fstring str; /* sid string buffer */
 771
 772         sid_copy(psid, get_global_sam_sid());
 773
 774         if((pass = getpwuid_alloc(uid))) {
 775
 776                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) {
 777                         passwd_free(&pass);
 778                         return NULL;
 779                 }
 780
 781                 if (pdb_getsampwnam(sam_user, pass->pw_name)) {
 782                         sid_copy(psid, pdb_get_user_sid(sam_user));
 783                 } else {
 784                         sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 785                 }
 786
 787                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n",
 788                           (unsigned)uid, sid_to_string( str, psid),
 789                           pass->pw_name ));
 790
 791                 passwd_free(&pass);
 792                 pdb_free_sam(&sam_user);
 793
 794         } else {
 795                 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 796
 797                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n",
 798                           (unsigned)uid, sid_to_string( str, psid)));
 799         }
 800
 801         return psid;
 802 }
 803
 804 /****************************************************************************
 805  Convert a SID to uid - locally.
 806 ****************************************************************************/
 807
 808 BOOL local_sid_to_uid(uid_t *puid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 809 {
 810         DOM_SID dom_sid;
 811         uint32 rid;
 812         fstring str;
 813         SAM_ACCOUNT *sam_user = NULL;
 814
 815         *name_type = SID_NAME_UNKNOWN;
 816
 817         sid_copy(&dom_sid, psid);
 818         sid_split_rid(&dom_sid, &rid);
 819
 820         /*
 821          * We can only convert to a uid if this is our local
 822          * Domain SID (ie. we are the controling authority).
 823          */
 824         if (!sid_equal(get_global_sam_sid(), &dom_sid))
 825                 return False;
 826
 827         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 828                 return False;
 829
 830         if (pdb_getsampwsid(sam_user, psid)) {
 831                 *puid = pdb_get_uid(sam_user);
 832                 if (*puid == -1) {
 833                         pdb_free_sam(&sam_user);
 834                         return False;
 835                 }
 836                 DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 837                           (unsigned int)*puid, pdb_get_username(sam_user)));
 838         } else {
 839                 DEBUG(5,("local_sid_to_uid: SID %s not mapped becouse RID was not found in passdb.\n", sid_to_string( str, psid)));
 840                 pdb_free_sam(&sam_user);
 841                 return False;
 842         }
 843         pdb_free_sam(&sam_user);
 844
 845         *name_type = SID_NAME_USER;
 846
 847         return True;
 848 }
 849
 850 /****************************************************************************
 851  Convert a gid to SID - locally.
 852 ****************************************************************************/
 853
 854 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 855 {
 856         GROUP_MAP map;
 857
 858         sid_copy(psid, get_global_sam_sid());
 859
 860         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 861                 sid_copy(psid, &map.sid);
 862         }
 863         else {
 864                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 865         }
 866
 867         return psid;
 868 }
 869
 870 /****************************************************************************
 871  Convert a SID to gid - locally.
 872 ****************************************************************************/
 873
 874 BOOL local_sid_to_gid(gid_t *pgid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 875 {
 876         DOM_SID dom_sid;
 877         uint32 rid;
 878         fstring str;
 879         GROUP_MAP map;
 880
 881         *name_type = SID_NAME_UNKNOWN;
 882
 883         sid_copy(&dom_sid, psid);
 884         sid_split_rid(&dom_sid, &rid);
 885
 886         /*
 887          * We can only convert to a gid if this is our local
 888          * Domain SID (ie. we are the controling authority).
 889          *
 890          * Or in the Builtin SID too. JFM, 11/30/2001
 891          */
 892
 893         if (!sid_equal(get_global_sam_sid(), &dom_sid))
 894                 return False;
 895
 896         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 897
 898                 /* the SID is in the mapping table but not mapped */
 899                 if (map.gid==-1)
 900                         return False;
 901
 902                 if (!sid_peek_check_rid(get_global_sam_sid(), &map.sid, &rid)){
 903                         DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 904                                 sid_string_static(&map.sid)));
 905                         return False;
 906                 }
 907                 *pgid = map.gid;
 908                 *name_type = map.sid_name_use;
 909                 DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n", sid_to_string( str, psid),
 910                           map.nt_name, (unsigned int)*pgid));
 911
 912         } else {
 913                 if (pdb_rid_is_user(rid))
 914                         return False;
 915
 916                 *pgid = pdb_group_rid_to_gid(rid);
 917                 *name_type = SID_NAME_ALIAS;
 918                 DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid),
 919                           (unsigned int)*pgid));
 920         }
 921
 922         return True;
 923 }
 924
 925 /**
 926  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 927  * @return static buffer containing the converted string
 928  **/
 929
 930 const char *pdb_unistr2_convert(const UNISTR2 *from)
 931 {
 932         static pstring convert_buffer;
 933         *convert_buffer = 0;
 934         if (!from) {
 935                 return convert_buffer;
 936         }
 937
 938         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 939         return convert_buffer;
 940 }
 941
 942 /*************************************************************
 943  Change a password entry in the local smbpasswd file.
 944
 945  FIXME!!  The function needs to be abstracted into the
 946  passdb interface or something.  It is currently being called
 947  by _api_samr_create_user() in rpc_server/srv_samr.c,
 948  in SWAT and by smbpasswd/pdbedit.
 949
 950  --jerry
 951  *************************************************************/
 952
 953 BOOL local_password_change(const char *user_name, int local_flags,
 954                            const char *new_passwd,
 955                            char *err_str, size_t err_str_len,
 956                            char *msg_str, size_t msg_str_len)
 957 {
 958         struct passwd  *pwd = NULL;
 959         SAM_ACCOUNT     *sam_pass=NULL;
 960
 961         *err_str = '\0';
 962         *msg_str = '\0';
 963
 964         /* Get the smb passwd entry for this user */
 965         pdb_init_sam(&sam_pass);
 966         if(!pdb_getsampwnam(sam_pass, user_name)) {
 967                 pdb_free_sam(&sam_pass);
 968
 969                 if (local_flags & LOCAL_ADD_USER) {
 970                         pwd = getpwnam_alloc(user_name);
 971                 } else if (local_flags & LOCAL_DELETE_USER) {
 972                         /* Might not exist in /etc/passwd */
 973                 } else {
 974                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
 975                         return False;
 976                 }
 977
 978                 if (pwd) {
 979                         /* Local user found, so init from this */
 980                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
 981                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
 982                                 passwd_free(&pwd);
 983                                 return False;
 984                         }
 985
 986                         passwd_free(&pwd);
 987                 } else {
 988                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
 989                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
 990                                 return False;
 991                         }
 992
 993                         if (!pdb_set_username(sam_pass, user_name)) {
 994                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
 995                                 pdb_free_sam(&sam_pass);
 996                                 return False;
 997                         }
 998                 }
 999                 if (local_flags & LOCAL_TRUST_ACCOUNT) {
1000                         if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST)) {
1001                                 slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1002                                 pdb_free_sam(&sam_pass);
1003                                 return False;
1004                         }
1005                 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1006                         if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST)) {
1007                                 slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1008                                 pdb_free_sam(&sam_pass);
1009                                 return False;
1010                         }
1011                 } else {
1012                         if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL)) {
1013                                 slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1014                                 pdb_free_sam(&sam_pass);
1015                                 return False;
1016                         }
1017                 }
1018
1019         } else {
1020                 /* the entry already existed */
1021                 local_flags &= ~LOCAL_ADD_USER;
1022         }
1023
1024         /*
1025          * We are root - just write the new password
1026          * and the valid last change time.
1027          */
1028
1029         if (local_flags & LOCAL_DISABLE_USER) {
1030                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED)) {
1031                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1032                         pdb_free_sam(&sam_pass);
1033                         return False;
1034                 }
1035         } else if (local_flags & LOCAL_ENABLE_USER) {
1036                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1037                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1038                         pdb_free_sam(&sam_pass);
1039                         return False;
1040                 }
1041         }
1042
1043         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1044                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ)) {
1045                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1046                         pdb_free_sam(&sam_pass);
1047                         return False;
1048                 }
1049         } else if (local_flags & LOCAL_SET_PASSWORD) {
1050                 /*
1051                  * If we're dealing with setting a completely empty user account
1052                  * ie. One with a password of 'XXXX', but not set disabled (like
1053                  * an account created from scratch) then if the old password was
1054                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1055                  * We remove that as we're giving this user their first password
1056                  * and the decision hasn't really been made to disable them (ie.
1057                  * don't create them disabled). JRA.
1058                  */
1059                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1060                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1061                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1062                                 pdb_free_sam(&sam_pass);
1063                                 return False;
1064                         }
1065                 }
1066                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ))) {
1067                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1068                         pdb_free_sam(&sam_pass);
1069                         return False;
1070                 }
1071
1072                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1073                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1074                         pdb_free_sam(&sam_pass);
1075                         return False;
1076                 }
1077         }
1078
1079         if (local_flags & LOCAL_ADD_USER) {
1080                 if (pdb_add_sam_account(sam_pass)) {
1081                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1082                         pdb_free_sam(&sam_pass);
1083                         return True;
1084                 } else {
1085                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1086                         pdb_free_sam(&sam_pass);
1087                         return False;
1088                 }
1089         } else if (local_flags & LOCAL_DELETE_USER) {
1090                 if (!pdb_delete_sam_account(sam_pass)) {
1091                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1092                         pdb_free_sam(&sam_pass);
1093                         return False;
1094                 }
1095                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1096         } else {
1097                 if(!pdb_update_sam_account(sam_pass)) {
1098                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1099                         pdb_free_sam(&sam_pass);
1100                         return False;
1101                 }
1102                 if(local_flags & LOCAL_DISABLE_USER)
1103                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1104                 else if (local_flags & LOCAL_ENABLE_USER)
1105                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1106                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1107                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1108         }
1109
1110         pdb_free_sam(&sam_pass);
1111         return True;
1112 }