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.uid = user->private.gid       = -1;
  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_named("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         GROUP_MAP map;
 166
 167         const char *guest_account = lp_guestaccount();
 168         if (!(guest_account && *guest_account)) {
 169                 DEBUG(1, ("NULL guest account!?!?\n"));
 170                 return NT_STATUS_UNSUCCESSFUL;
 171         }
 172
 173         if (!pwd) {
 174                 return NT_STATUS_UNSUCCESSFUL;
 175         }
 176
 177         pdb_fill_default_sam(sam_account);
 178
 179         pdb_set_username(sam_account, pwd->pw_name, PDB_SET);
 180         pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET);
 181
 182         pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET);
 183
 184         pdb_set_domain (sam_account, lp_workgroup(), PDB_DEFAULT);
 185
 186         pdb_set_uid(sam_account, pwd->pw_uid, PDB_SET);
 187         pdb_set_gid(sam_account, pwd->pw_gid, PDB_SET);
 188
 189         /* When we get a proper uid -> SID and SID -> uid allocation
 190            mechinism, we should call it here.
 191
 192            We can't just set this to 0 or allow it only to be filled
 193            in when added to the backend, becouse the user's SID
 194            may already be in security descriptors etc.
 195
 196            -- abartlet 11-May-02
 197         */
 198
 199
 200         /* Ensure this *must* be set right */
 201         if (strcmp(pwd->pw_name, guest_account) == 0) {
 202                 if (!pdb_set_user_sid_from_rid(sam_account, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) {
 203                         return NT_STATUS_UNSUCCESSFUL;
 204                 }
 205                 if (!pdb_set_group_sid_from_rid(sam_account, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) {
 206                         return NT_STATUS_UNSUCCESSFUL;
 207                 }
 208         } else {
 209
 210                 if (!pdb_set_user_sid_from_rid(sam_account,
 211                                                fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 212                         DEBUG(0,("Can't set User SID from RID!\n"));
 213                         return NT_STATUS_INVALID_PARAMETER;
 214                 }
 215
 216                 /* call the mapping code here */
 217                 if(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 218                         if (!pdb_set_group_sid(sam_account,&map.sid, PDB_SET)){
 219                                 DEBUG(0,("Can't set Group SID!\n"));
 220                                 return NT_STATUS_INVALID_PARAMETER;
 221                         }
 222                 }
 223                 else {
 224                         if (!pdb_set_group_sid_from_rid(sam_account,pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 225                                 DEBUG(0,("Can't set Group SID\n"));
 226                                 return NT_STATUS_INVALID_PARAMETER;
 227                         }
 228                 }
 229         }
 230
 231         /* check if this is a user account or a machine account */
 232         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 233         {
 234                 pdb_set_profile_path(sam_account,
 235                                      talloc_sub_specified((sam_account)->mem_ctx,
 236                                                             lp_logon_path(),
 237                                                             pwd->pw_name, global_myname,
 238                                                             pwd->pw_uid, pwd->pw_gid),
 239                                      PDB_DEFAULT);
 240
 241                 pdb_set_homedir(sam_account,
 242                                 talloc_sub_specified((sam_account)->mem_ctx,
 243                                                        lp_logon_home(),
 244                                                        pwd->pw_name, global_myname,
 245                                                        pwd->pw_uid, pwd->pw_gid),
 246                                 PDB_DEFAULT);
 247
 248                 pdb_set_dir_drive(sam_account,
 249                                   talloc_sub_specified((sam_account)->mem_ctx,
 250                                                          lp_logon_drive(),
 251                                                          pwd->pw_name, global_myname,
 252                                                          pwd->pw_uid, pwd->pw_gid),
 253                                   PDB_DEFAULT);
 254
 255                 pdb_set_logon_script(sam_account,
 256                                      talloc_sub_specified((sam_account)->mem_ctx,
 257                                                             lp_logon_script(),
 258                                                             pwd->pw_name, global_myname,
 259                                                             pwd->pw_uid, pwd->pw_gid),
 260                                      PDB_DEFAULT);
 261                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) {
 262                         DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name));
 263                         return NT_STATUS_UNSUCCESSFUL;
 264                 }
 265         } else {
 266                 if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) {
 267                         DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name));
 268                         return NT_STATUS_UNSUCCESSFUL;
 269                 }
 270         }
 271         return NT_STATUS_OK;
 272 }
 273
 274
 275 /*************************************************************
 276  Initialises a struct sam_passwd with sane values.
 277  ************************************************************/
 278
 279 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 280 {
 281         NTSTATUS nt_status;
 282
 283         if (!pwd) {
 284                 new_sam_acct = NULL;
 285                 return NT_STATUS_UNSUCCESSFUL;
 286         }
 287
 288         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 289                 new_sam_acct = NULL;
 290                 return nt_status;
 291         }
 292
 293         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 294                 pdb_free_sam(new_sam_acct);
 295                 new_sam_acct = NULL;
 296                 return nt_status;
 297         }
 298
 299         return NT_STATUS_OK;
 300 }
 301
 302
 303 /**
 304  * Free the contets of the SAM_ACCOUNT, but not the structure.
 305  *
 306  * Also wipes the LM and NT hashes and plaintext passwrod from
 307  * memory.
 308  *
 309  * @param user SAM_ACCOUNT to free members of.
 310  **/
 311
 312 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 313 {
 314
 315         /* Kill off sensitive data.  Free()ed by the
 316            talloc mechinism */
 317
 318         data_blob_clear_free(&(user->private.lm_pw));
 319         data_blob_clear_free(&(user->private.nt_pw));
 320         if (user->private.plaintext_pw!=NULL)
 321                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 322 }
 323
 324
 325 /************************************************************
 326  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 327  ***********************************************************/
 328
 329 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 330 {
 331         if (user == NULL) {
 332                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 333 #if 0
 334                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 335 #endif
 336                 return NT_STATUS_UNSUCCESSFUL;
 337         }
 338
 339         pdb_free_sam_contents(user);
 340
 341         pdb_fill_default_sam(user);
 342
 343         return NT_STATUS_OK;
 344 }
 345
 346
 347 /************************************************************
 348  Free the SAM_ACCOUNT and the member pointers.
 349  ***********************************************************/
 350
 351 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 352 {
 353         if (*user == NULL) {
 354                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 355 #if 0
 356                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 357 #endif
 358                 return NT_STATUS_UNSUCCESSFUL;
 359         }
 360
 361         pdb_free_sam_contents(*user);
 362
 363         if ((*user)->free_fn) {
 364                 (*user)->free_fn(user);
 365         }
 366
 367         return NT_STATUS_OK;
 368 }
 369
 370
 371 /**********************************************************
 372  Encode the account control bits into a string.
 373  length = length of string to encode into (including terminating
 374  null). length *MUST BE MORE THAN 2* !
 375  **********************************************************/
 376
 377 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 378 {
 379         static fstring acct_str;
 380         size_t i = 0;
 381
 382         acct_str[i++] = '[';
 383
 384         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 385         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 386         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 387         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 388         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 389         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 390         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 391         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 392         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 393         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 394         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 395
 396         for ( ; i < length - 2 ; i++ )
 397                 acct_str[i] = ' ';
 398
 399         i = length - 2;
 400         acct_str[i++] = ']';
 401         acct_str[i++] = '\0';
 402
 403         return acct_str;
 404 }
 405
 406 /**********************************************************
 407  Decode the account control bits from a string.
 408  **********************************************************/
 409
 410 uint16 pdb_decode_acct_ctrl(const char *p)
 411 {
 412         uint16 acct_ctrl = 0;
 413         BOOL finished = False;
 414
 415         /*
 416          * Check if the account type bits have been encoded after the
 417          * NT password (in the form [NDHTUWSLXI]).
 418          */
 419
 420         if (*p != '[')
 421                 return 0;
 422
 423         for (p++; *p && !finished; p++) {
 424                 switch (*p) {
 425                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 426                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 427                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 428                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 429                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 430                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 431                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 432                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 433                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 434                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 435                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 436             case ' ': { break; }
 437                         case ':':
 438                         case '\n':
 439                         case '\0':
 440                         case ']':
 441                         default:  { finished = True; }
 442                 }
 443         }
 444
 445         return acct_ctrl;
 446 }
 447
 448 /*************************************************************
 449  Routine to set 32 hex password characters from a 16 byte array.
 450 **************************************************************/
 451
 452 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 453 {
 454         if (pwd != NULL) {
 455                 int i;
 456                 for (i = 0; i < 16; i++)
 457                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 458         } else {
 459                 if (acct_ctrl & ACB_PWNOTREQ)
 460                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 461                 else
 462                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 463         }
 464 }
 465
 466 /*************************************************************
 467  Routine to get the 32 hex characters and turn them
 468  into a 16 byte array.
 469 **************************************************************/
 470
 471 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 472 {
 473         int i;
 474         unsigned char   lonybble, hinybble;
 475         char           *hexchars = "0123456789ABCDEF";
 476         char           *p1, *p2;
 477
 478         if (!p)
 479                 return (False);
 480
 481         for (i = 0; i < 32; i += 2) {
 482                 hinybble = toupper(p[i]);
 483                 lonybble = toupper(p[i + 1]);
 484
 485                 p1 = strchr(hexchars, hinybble);
 486                 p2 = strchr(hexchars, lonybble);
 487
 488                 if (!p1 || !p2)
 489                         return (False);
 490
 491                 hinybble = PTR_DIFF(p1, hexchars);
 492                 lonybble = PTR_DIFF(p2, hexchars);
 493
 494                 pwd[i / 2] = (hinybble << 4) | lonybble;
 495         }
 496         return (True);
 497 }
 498
 499 /*******************************************************************
 500  Converts NT user RID to a UNIX uid.
 501  ********************************************************************/
 502
 503 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 504 {
 505         int rid_offset = lp_algorithmic_rid_base();
 506         return (uid_t)(((user_rid & (~USER_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 507 }
 508
 509
 510 /*******************************************************************
 511  converts UNIX uid to an NT User RID.
 512  ********************************************************************/
 513
 514 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 515 {
 516         int rid_offset = lp_algorithmic_rid_base();
 517         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 518 }
 519
 520 /*******************************************************************
 521  Converts NT group RID to a UNIX gid.
 522  ********************************************************************/
 523
 524 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 525 {
 526         int rid_offset = lp_algorithmic_rid_base();
 527         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 528 }
 529
 530 /*******************************************************************
 531  converts NT Group RID to a UNIX uid.
 532
 533  warning: you must not call that function only
 534  you must do a call to the group mapping first.
 535  there is not anymore a direct link between the gid and the rid.
 536  ********************************************************************/
 537
 538 uint32 pdb_gid_to_group_rid(gid_t gid)
 539 {
 540         int rid_offset = lp_algorithmic_rid_base();
 541         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 542 }
 543
 544 /*******************************************************************
 545  Decides if a RID is a well known RID.
 546  ********************************************************************/
 547
 548 static BOOL pdb_rid_is_well_known(uint32 rid)
 549 {
 550         /* Not using rid_offset here, becouse this is the actual
 551            NT fixed value (1000) */
 552
 553         return (rid < BASE_RID);
 554 }
 555
 556 /*******************************************************************
 557  Decides if a RID is a user or group RID.
 558  ********************************************************************/
 559
 560 BOOL pdb_rid_is_user(uint32 rid)
 561 {
 562   /* lkcl i understand that NT attaches an enumeration to a RID
 563    * such that it can be identified as either a user, group etc
 564    * type.  there are 5 such categories, and they are documented.
 565    */
 566         /* However, they are not in the RID, just somthing you can query
 567            seperatly.  Sorry luke :-) */
 568
 569    if(pdb_rid_is_well_known(rid)) {
 570       /*
 571        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 572        * and DOMAIN_USER_RID_GUEST.
 573        */
 574      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 575        return True;
 576    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 577      return True;
 578    }
 579    return False;
 580 }
 581
 582 /*******************************************************************
 583  Convert a rid into a name. Used in the lookup SID rpc.
 584  ********************************************************************/
 585
 586 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 587 {
 588         uint32 rid;
 589         SAM_ACCOUNT *sam_account = NULL;
 590         GROUP_MAP map;
 591
 592         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 593                 DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 594                         sid_string_static(&map.sid)));
 595                 return False;
 596         }
 597         *psid_name_use = SID_NAME_UNKNOWN;
 598
 599         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 600
 601         if (rid == DOMAIN_USER_RID_ADMIN) {
 602                 char **admin_list = lp_admin_users(-1);
 603                 *psid_name_use = SID_NAME_USER;
 604                 if (admin_list) {
 605                         char *p = *admin_list;
 606                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 607                                 fstrcpy(name, "Administrator");
 608                 } else {
 609                         fstrcpy(name, "Administrator");
 610                 }
 611                 return True;
 612         }
 613
 614         /*
 615          * Don't try to convert the rid to a name if
 616          * running in appliance mode
 617          */
 618
 619         if (lp_hide_local_users())
 620                 return False;
 621
 622         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 623                 return False;
 624         }
 625
 626         /* This now does the 'generic' mapping in pdb_unix */
 627         /* 'guest' is also handled there */
 628         if (pdb_getsampwsid(sam_account, sid)) {
 629                 fstrcpy(name, pdb_get_username(sam_account));
 630                 *psid_name_use = SID_NAME_USER;
 631
 632                 pdb_free_sam(&sam_account);
 633
 634                 return True;
 635         }
 636
 637         pdb_free_sam(&sam_account);
 638
 639         if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 640                 if (map.gid!=-1) {
 641                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 642                 } else {
 643                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 644                 }
 645
 646                 fstrcpy(name, map.nt_name);
 647                 *psid_name_use = map.sid_name_use;
 648                 return True;
 649         }
 650
 651         if (pdb_rid_is_user(rid)) {
 652                 uid_t uid;
 653
 654                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 655
 656                 uid = fallback_pdb_user_rid_to_uid(rid);
 657                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 658
 659                 return False;  /* Indicates that this user was 'not mapped' */
 660         } else {
 661                 gid_t gid;
 662                 struct group *gr;
 663
 664                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 665
 666                 gid = pdb_group_rid_to_gid(rid);
 667                 gr = getgrgid(gid);
 668
 669                 *psid_name_use = SID_NAME_ALIAS;
 670
 671                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 672                          gr ? "succeeded" : "failed" ));
 673
 674                 if(!gr) {
 675                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 676                         return False; /* Indicates that this group was 'not mapped' */
 677                 }
 678
 679                 fstrcpy( name, gr->gr_name);
 680
 681                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 682                          (unsigned int)rid ));
 683                 return True;
 684         }
 685 }
 686
 687 /*******************************************************************
 688  Convert a name into a SID. Used in the lookup name rpc.
 689  ********************************************************************/
 690
 691 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 692 {
 693         extern DOM_SID global_sid_World_Domain;
 694         DOM_SID local_sid;
 695         fstring user;
 696         SAM_ACCOUNT *sam_account = NULL;
 697         struct group *grp;
 698         GROUP_MAP map;
 699
 700         *psid_name_use = SID_NAME_UNKNOWN;
 701
 702         /*
 703          * user may be quoted a const string, and map_username and
 704          * friends can modify it. Make a modifiable copy. JRA.
 705          */
 706
 707         fstrcpy(user, c_user);
 708
 709         sid_copy(&local_sid, get_global_sam_sid());
 710
 711         /*
 712          * Special case for MACHINE\Everyone. Map to the world_sid.
 713          */
 714
 715         if(strequal(user, "Everyone")) {
 716                 sid_copy( psid, &global_sid_World_Domain);
 717                 sid_append_rid(psid, 0);
 718                 *psid_name_use = SID_NAME_ALIAS;
 719                 return True;
 720         }
 721
 722         /*
 723          * Don't lookup local unix users if running in appliance mode
 724          */
 725         if (lp_hide_local_users())
 726                 return False;
 727
 728         (void)map_username(user);
 729
 730         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 731                 return False;
 732         }
 733
 734         if (pdb_getsampwnam(sam_account, user)) {
 735                 sid_copy(psid, pdb_get_user_sid(sam_account));
 736                 *psid_name_use = SID_NAME_USER;
 737
 738                 pdb_free_sam(&sam_account);
 739                 return True;
 740         }
 741
 742         pdb_free_sam(&sam_account);
 743
 744         /*
 745          * Maybe it was a group ?
 746          */
 747
 748         /* check if it's a mapped group */
 749         if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 750                 /* yes it's a mapped group */
 751                 sid_copy(&local_sid, &map.sid);
 752                 *psid_name_use = map.sid_name_use;
 753         } else {
 754                 /* it's not a mapped group */
 755                 grp = getgrnam(user);
 756                 if(!grp)
 757                         return False;
 758
 759                 /*
 760                  *check if it's mapped, if it is reply it doesn't exist
 761                  *
 762                  * that's to prevent this case:
 763                  *
 764                  * unix group ug is mapped to nt group ng
 765                  * someone does a lookup on ug
 766                  * we must not reply as it doesn't "exist" anymore
 767                  * for NT. For NT only ng exists.
 768                  * JFM, 30/11/2001
 769                  */
 770
 771                 if (get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 772                         return False;
 773                 }
 774
 775                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 776                 *psid_name_use = SID_NAME_ALIAS;
 777         }
 778
 779         sid_copy( psid, &local_sid);
 780
 781         return True;
 782 }
 783
 784 /****************************************************************************
 785  Convert a uid to SID - locally.
 786 ****************************************************************************/
 787
 788 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 789 {
 790         struct passwd *pass;
 791         SAM_ACCOUNT *sam_user = NULL;
 792         fstring str; /* sid string buffer */
 793
 794         sid_copy(psid, get_global_sam_sid());
 795
 796         if((pass = getpwuid_alloc(uid))) {
 797
 798                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) {
 799                         passwd_free(&pass);
 800                         return NULL;
 801                 }
 802
 803                 if (pdb_getsampwnam(sam_user, pass->pw_name)) {
 804                         sid_copy(psid, pdb_get_user_sid(sam_user));
 805                 } else if (strcmp(pass->pw_name, lp_guestaccount()) == 0) {
 806                         sid_append_rid(psid, DOMAIN_USER_RID_GUEST);
 807                 } else {
 808                         sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 809                 }
 810
 811                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n",
 812                           (unsigned)uid, sid_to_string( str, psid),
 813                           pass->pw_name ));
 814
 815                 passwd_free(&pass);
 816                 pdb_free_sam(&sam_user);
 817
 818         } else {
 819                 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 820
 821                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n",
 822                           (unsigned)uid, sid_to_string( str, psid)));
 823         }
 824
 825         return psid;
 826 }
 827
 828 /****************************************************************************
 829  Convert a SID to uid - locally.
 830 ****************************************************************************/
 831
 832 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 833 {
 834         fstring str;
 835         SAM_ACCOUNT *sam_user = NULL;
 836
 837         *name_type = SID_NAME_UNKNOWN;
 838
 839         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 840                 return False;
 841
 842         if (pdb_getsampwsid(sam_user, psid)) {
 843
 844                 if (!IS_SAM_SET(sam_user,PDB_UID)&&!IS_SAM_CHANGED(sam_user,PDB_UID)) {
 845                         pdb_free_sam(&sam_user);
 846                         return False;
 847                 }
 848
 849                 *puid = pdb_get_uid(sam_user);
 850
 851                 DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 852                           (unsigned int)*puid, pdb_get_username(sam_user)));
 853                 pdb_free_sam(&sam_user);
 854         } else {
 855
 856                 DOM_SID dom_sid;
 857                 uint32 rid;
 858                 GROUP_MAP map;
 859
 860                 pdb_free_sam(&sam_user);
 861
 862                 if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 863                         DEBUG(3, ("local_sid_to_uid: SID '%s' is a group, not a user... \n", sid_to_string(str, psid)));
 864                         /* It's a group, not a user... */
 865                         return False;
 866                 }
 867
 868                 sid_copy(&dom_sid, psid);
 869                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 870                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 871                         return False;
 872                 }
 873
 874                 if (!pdb_rid_is_user(rid)) {
 875                         DEBUG(3, ("local_sid_to_uid: sid '%s' cannot be mapped to a uid algorithmicly becouse it is a group\n", sid_to_string(str, psid)));
 876                         return False;
 877                 }
 878
 879                 *puid = fallback_pdb_user_rid_to_uid(rid);
 880
 881                 DEBUG(5,("local_sid_to_uid: SID %s algorithmicly mapped to %ld mapped becouse SID was not found in passdb.\n",
 882                          sid_to_string(str, psid), (signed long int)(*puid)));
 883         }
 884
 885         *name_type = SID_NAME_USER;
 886
 887         return True;
 888 }
 889
 890 /****************************************************************************
 891  Convert a gid to SID - locally.
 892 ****************************************************************************/
 893
 894 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 895 {
 896         GROUP_MAP map;
 897
 898         sid_copy(psid, get_global_sam_sid());
 899
 900         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 901                 sid_copy(psid, &map.sid);
 902         }
 903         else {
 904                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 905         }
 906
 907         return psid;
 908 }
 909
 910 /****************************************************************************
 911  Convert a SID to gid - locally.
 912 ****************************************************************************/
 913
 914 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 915 {
 916         fstring str;
 917         GROUP_MAP map;
 918
 919         *name_type = SID_NAME_UNKNOWN;
 920
 921         /*
 922          * We can only convert to a gid if this is our local
 923          * Domain SID (ie. we are the controling authority).
 924          *
 925          * Or in the Builtin SID too. JFM, 11/30/2001
 926          */
 927
 928         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 929
 930                 /* the SID is in the mapping table but not mapped */
 931                 if (map.gid==-1)
 932                         return False;
 933
 934                 *pgid = map.gid;
 935                 *name_type = map.sid_name_use;
 936                 DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n",
 937                           sid_to_string( str, psid),
 938                           map.nt_name, (unsigned int)*pgid));
 939
 940         } else {
 941                 uint32 rid;
 942                 SAM_ACCOUNT *sam_user = NULL;
 943                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 944                         return False;
 945
 946                 if (pdb_getsampwsid(sam_user, psid)) {
 947                         return False;
 948                         pdb_free_sam(&sam_user);
 949                 }
 950
 951                 pdb_free_sam(&sam_user);
 952
 953                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 954                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 955                         return False;
 956                 }
 957
 958                 if (pdb_rid_is_user(rid))
 959                         return False;
 960
 961                 *pgid = pdb_group_rid_to_gid(rid);
 962                 *name_type = SID_NAME_ALIAS;
 963                 DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid),
 964                           (unsigned int)*pgid));
 965         }
 966
 967         return True;
 968 }
 969
 970 /**
 971  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 972  * @return static buffer containing the converted string
 973  **/
 974
 975 const char *pdb_unistr2_convert(const UNISTR2 *from)
 976 {
 977         static pstring convert_buffer;
 978         *convert_buffer = 0;
 979         if (!from) {
 980                 return NULL;
 981         }
 982
 983         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 984         return convert_buffer;
 985 }
 986
 987 /*************************************************************
 988  Change a password entry in the local smbpasswd file.
 989
 990  FIXME!!  The function needs to be abstracted into the
 991  passdb interface or something.  It is currently being called
 992  by _api_samr_create_user() in rpc_server/srv_samr.c,
 993  in SWAT and by smbpasswd/pdbedit.
 994
 995  --jerry
 996  *************************************************************/
 997
 998 BOOL local_password_change(const char *user_name, int local_flags,
 999                            const char *new_passwd,
1000                            char *err_str, size_t err_str_len,
1001                            char *msg_str, size_t msg_str_len)
1002 {
1003         struct passwd  *pwd = NULL;
1004         SAM_ACCOUNT     *sam_pass=NULL;
1005         uint16 other_acb;
1006
1007         *err_str = '\0';
1008         *msg_str = '\0';
1009
1010         /* Get the smb passwd entry for this user */
1011         pdb_init_sam(&sam_pass);
1012         if(!pdb_getsampwnam(sam_pass, user_name)) {
1013                 pdb_free_sam(&sam_pass);
1014
1015                 if (local_flags & LOCAL_ADD_USER) {
1016                         pwd = getpwnam_alloc(user_name);
1017                 } else if (local_flags & LOCAL_DELETE_USER) {
1018                         /* Might not exist in /etc/passwd */
1019                 } else {
1020                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1021                         return False;
1022                 }
1023
1024                 if (pwd) {
1025                         /* Local user found, so init from this */
1026                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1027                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1028                                 passwd_free(&pwd);
1029                                 return False;
1030                         }
1031
1032                         passwd_free(&pwd);
1033                 } else {
1034                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1035                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1036                                 return False;
1037                         }
1038
1039                         if (!pdb_set_username(sam_pass, user_name, PDB_CHANGED)) {
1040                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1041                                 pdb_free_sam(&sam_pass);
1042                                 return False;
1043                         }
1044                 }
1045         } else {
1046                 /* the entry already existed */
1047                 local_flags &= ~LOCAL_ADD_USER;
1048         }
1049
1050         /* the 'other' acb bits not being changed here */
1051         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
1052         if (local_flags & LOCAL_TRUST_ACCOUNT) {
1053                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
1054                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1055                         pdb_free_sam(&sam_pass);
1056                         return False;
1057                 }
1058         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1059                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
1060                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1061                         pdb_free_sam(&sam_pass);
1062                         return False;
1063                 }
1064         } else {
1065                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
1066                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1067                         pdb_free_sam(&sam_pass);
1068                         return False;
1069                 }
1070         }
1071
1072         /*
1073          * We are root - just write the new password
1074          * and the valid last change time.
1075          */
1076
1077         if (local_flags & LOCAL_DISABLE_USER) {
1078                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
1079                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1080                         pdb_free_sam(&sam_pass);
1081                         return False;
1082                 }
1083         } else if (local_flags & LOCAL_ENABLE_USER) {
1084                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1085                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1086                         pdb_free_sam(&sam_pass);
1087                         return False;
1088                 }
1089         }
1090
1091         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1092                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
1093                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1094                         pdb_free_sam(&sam_pass);
1095                         return False;
1096                 }
1097         } else if (local_flags & LOCAL_SET_PASSWORD) {
1098                 /*
1099                  * If we're dealing with setting a completely empty user account
1100                  * ie. One with a password of 'XXXX', but not set disabled (like
1101                  * an account created from scratch) then if the old password was
1102                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1103                  * We remove that as we're giving this user their first password
1104                  * and the decision hasn't really been made to disable them (ie.
1105                  * don't create them disabled). JRA.
1106                  */
1107                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1108                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1109                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1110                                 pdb_free_sam(&sam_pass);
1111                                 return False;
1112                         }
1113                 }
1114                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
1115                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1116                         pdb_free_sam(&sam_pass);
1117                         return False;
1118                 }
1119
1120                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1121                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1122                         pdb_free_sam(&sam_pass);
1123                         return False;
1124                 }
1125         }
1126
1127         if (local_flags & LOCAL_ADD_USER) {
1128                 if (pdb_add_sam_account(sam_pass)) {
1129                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1130                         pdb_free_sam(&sam_pass);
1131                         return True;
1132                 } else {
1133                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1134                         pdb_free_sam(&sam_pass);
1135                         return False;
1136                 }
1137         } else if (local_flags & LOCAL_DELETE_USER) {
1138                 if (!pdb_delete_sam_account(sam_pass)) {
1139                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1140                         pdb_free_sam(&sam_pass);
1141                         return False;
1142                 }
1143                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1144         } else {
1145                 if(!pdb_update_sam_account(sam_pass)) {
1146                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1147                         pdb_free_sam(&sam_pass);
1148                         return False;
1149                 }
1150                 if(local_flags & LOCAL_DISABLE_USER)
1151                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1152                 else if (local_flags & LOCAL_ENABLE_USER)
1153                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1154                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1155                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1156         }
1157
1158         pdb_free_sam(&sam_pass);
1159         return True;
1160 }