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 /************************************************************
  36  Fill the SAM_ACCOUNT with default values.
  37  ***********************************************************/
  38
  39 static void pdb_fill_default_sam(SAM_ACCOUNT *user)
  40 {
  41         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  42
  43         /* no initial methods */
  44         user->methods = NULL;
  45
  46         /* Don't change these timestamp settings without a good reason.
  47            They are important for NT member server compatibility. */
  48
  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         user->private.plaintext_pw = NULL;
  80
  81 }
  82
  83 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
  84 {
  85         if (*user) {
  86                 data_blob_clear_free(&((*user)->private.lm_pw));
  87                 data_blob_clear_free(&((*user)->private.nt_pw));
  88
  89                 if((*user)->private.plaintext_pw!=NULL)
  90                         memset((*user)->private.plaintext_pw,'\0',strlen((*user)->private.plaintext_pw));
  91                 talloc_destroy((*user)->mem_ctx);
  92                 *user = NULL;
  93         }
  94 }
  95
  96
  97 /**********************************************************************
  98  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
  99 ***********************************************************************/
 100
 101 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
 102 {
 103         if (*user != NULL) {
 104                 DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n"));
 105 #if 0
 106                 smb_panic("non-NULL pointer passed to pdb_init_sam\n");
 107 #endif
 108                 return NT_STATUS_UNSUCCESSFUL;
 109         }
 110
 111         if (!mem_ctx) {
 112                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 113                 return NT_STATUS_UNSUCCESSFUL;
 114         }
 115
 116         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 117
 118         if (*user==NULL) {
 119                 DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n"));
 120                 return NT_STATUS_NO_MEMORY;
 121         }
 122
 123         (*user)->mem_ctx = mem_ctx;
 124
 125         (*user)->free_fn = NULL;
 126
 127         pdb_fill_default_sam(*user);
 128
 129         return NT_STATUS_OK;
 130 }
 131
 132
 133 /*************************************************************
 134  Alloc memory and initialises a struct sam_passwd.
 135  ************************************************************/
 136
 137 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 138 {
 139         TALLOC_CTX *mem_ctx;
 140         NTSTATUS nt_status;
 141
 142         mem_ctx = talloc_init("passdb internal SAM_ACCOUNT allocation");
 143
 144         if (!mem_ctx) {
 145                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 146                 return NT_STATUS_NO_MEMORY;
 147         }
 148
 149         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 150                 talloc_destroy(mem_ctx);
 151                 return nt_status;
 152         }
 153
 154         (*user)->free_fn = destroy_pdb_talloc;
 155
 156         return NT_STATUS_OK;
 157 }
 158
 159
 160 /*************************************************************
 161  Initialises a struct sam_passwd with sane values.
 162  ************************************************************/
 163
 164 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 165 {
 166         GROUP_MAP map;
 167
 168         const char *guest_account = lp_guestaccount();
 169         if (!(guest_account && *guest_account)) {
 170                 DEBUG(1, ("NULL guest account!?!?\n"));
 171                 return NT_STATUS_UNSUCCESSFUL;
 172         }
 173
 174         if (!pwd) {
 175                 return NT_STATUS_UNSUCCESSFUL;
 176         }
 177
 178         pdb_fill_default_sam(sam_account);
 179
 180         pdb_set_username(sam_account, pwd->pw_name, PDB_SET);
 181         pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET);
 182
 183         pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET);
 184
 185         pdb_set_domain (sam_account, lp_workgroup(), PDB_DEFAULT);
 186
 187         pdb_set_uid(sam_account, pwd->pw_uid, PDB_SET);
 188         pdb_set_gid(sam_account, pwd->pw_gid, PDB_SET);
 189
 190         /* When we get a proper uid -> SID and SID -> uid allocation
 191            mechinism, we should call it here.
 192
 193            We can't just set this to 0 or allow it only to be filled
 194            in when added to the backend, becouse the user's SID
 195            may already be in security descriptors etc.
 196
 197            -- abartlet 11-May-02
 198         */
 199
 200
 201         /* Ensure this *must* be set right */
 202         if (strcmp(pwd->pw_name, guest_account) == 0) {
 203                 if (!pdb_set_user_sid_from_rid(sam_account, DOMAIN_USER_RID_GUEST, PDB_DEFAULT)) {
 204                         return NT_STATUS_UNSUCCESSFUL;
 205                 }
 206                 if (!pdb_set_group_sid_from_rid(sam_account, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT)) {
 207                         return NT_STATUS_UNSUCCESSFUL;
 208                 }
 209         } else {
 210
 211                 if (!pdb_set_user_sid_from_rid(sam_account,
 212                                                fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 213                         DEBUG(0,("Can't set User SID from RID!\n"));
 214                         return NT_STATUS_INVALID_PARAMETER;
 215                 }
 216
 217                 /* call the mapping code here */
 218                 if(pdb_getgrgid(&map, pwd->pw_gid, MAPPING_WITHOUT_PRIV)) {
 219                         if (!pdb_set_group_sid(sam_account,&map.sid, PDB_SET)){
 220                                 DEBUG(0,("Can't set Group SID!\n"));
 221                                 return NT_STATUS_INVALID_PARAMETER;
 222                         }
 223                 }
 224                 else {
 225                         if (!pdb_set_group_sid_from_rid(sam_account,pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 226                                 DEBUG(0,("Can't set Group SID\n"));
 227                                 return NT_STATUS_INVALID_PARAMETER;
 228                         }
 229                 }
 230         }
 231
 232         /* check if this is a user account or a machine account */
 233         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 234         {
 235                 pdb_set_profile_path(sam_account,
 236                                      talloc_sub_specified((sam_account)->mem_ctx,
 237                                                             lp_logon_path(),
 238                                                             pwd->pw_name, global_myname(),
 239                                                             pwd->pw_uid, pwd->pw_gid),
 240                                      PDB_DEFAULT);
 241
 242                 pdb_set_homedir(sam_account,
 243                                 talloc_sub_specified((sam_account)->mem_ctx,
 244                                                        lp_logon_home(),
 245                                                        pwd->pw_name, global_myname(),
 246                                                        pwd->pw_uid, pwd->pw_gid),
 247                                 PDB_DEFAULT);
 248
 249                 pdb_set_dir_drive(sam_account,
 250                                   talloc_sub_specified((sam_account)->mem_ctx,
 251                                                          lp_logon_drive(),
 252                                                          pwd->pw_name, global_myname(),
 253                                                          pwd->pw_uid, pwd->pw_gid),
 254                                   PDB_DEFAULT);
 255
 256                 pdb_set_logon_script(sam_account,
 257                                      talloc_sub_specified((sam_account)->mem_ctx,
 258                                                             lp_logon_script(),
 259                                                             pwd->pw_name, global_myname(),
 260                                                             pwd->pw_uid, pwd->pw_gid),
 261                                      PDB_DEFAULT);
 262                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) {
 263                         DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name));
 264                         return NT_STATUS_UNSUCCESSFUL;
 265                 }
 266         } else {
 267                 if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) {
 268                         DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name));
 269                         return NT_STATUS_UNSUCCESSFUL;
 270                 }
 271         }
 272         return NT_STATUS_OK;
 273 }
 274
 275
 276 /*************************************************************
 277  Initialises a struct sam_passwd with sane values.
 278  ************************************************************/
 279
 280 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 281 {
 282         NTSTATUS nt_status;
 283
 284         if (!pwd) {
 285                 new_sam_acct = NULL;
 286                 return NT_STATUS_UNSUCCESSFUL;
 287         }
 288
 289         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 290                 new_sam_acct = NULL;
 291                 return nt_status;
 292         }
 293
 294         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 295                 pdb_free_sam(new_sam_acct);
 296                 new_sam_acct = NULL;
 297                 return nt_status;
 298         }
 299
 300         return NT_STATUS_OK;
 301 }
 302
 303
 304 /**
 305  * Free the contets of the SAM_ACCOUNT, but not the structure.
 306  *
 307  * Also wipes the LM and NT hashes and plaintext passwrod from
 308  * memory.
 309  *
 310  * @param user SAM_ACCOUNT to free members of.
 311  **/
 312
 313 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 314 {
 315
 316         /* Kill off sensitive data.  Free()ed by the
 317            talloc mechinism */
 318
 319         data_blob_clear_free(&(user->private.lm_pw));
 320         data_blob_clear_free(&(user->private.nt_pw));
 321         if (user->private.plaintext_pw!=NULL)
 322                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 323 }
 324
 325
 326 /************************************************************
 327  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 328  ***********************************************************/
 329
 330 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 331 {
 332         if (user == NULL) {
 333                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 334 #if 0
 335                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 336 #endif
 337                 return NT_STATUS_UNSUCCESSFUL;
 338         }
 339
 340         pdb_free_sam_contents(user);
 341
 342         pdb_fill_default_sam(user);
 343
 344         return NT_STATUS_OK;
 345 }
 346
 347
 348 /************************************************************
 349  Free the SAM_ACCOUNT and the member pointers.
 350  ***********************************************************/
 351
 352 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 353 {
 354         if (*user == NULL) {
 355                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 356 #if 0
 357                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 358 #endif
 359                 return NT_STATUS_UNSUCCESSFUL;
 360         }
 361
 362         pdb_free_sam_contents(*user);
 363
 364         if ((*user)->free_fn) {
 365                 (*user)->free_fn(user);
 366         }
 367
 368         return NT_STATUS_OK;
 369 }
 370
 371
 372 /**********************************************************
 373  Encode the account control bits into a string.
 374  length = length of string to encode into (including terminating
 375  null). length *MUST BE MORE THAN 2* !
 376  **********************************************************/
 377
 378 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 379 {
 380         static fstring acct_str;
 381         size_t i = 0;
 382
 383         acct_str[i++] = '[';
 384
 385         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 386         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 387         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 388         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 389         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 390         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 391         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 392         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 393         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 394         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 395         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 396
 397         for ( ; i < length - 2 ; i++ )
 398                 acct_str[i] = ' ';
 399
 400         i = length - 2;
 401         acct_str[i++] = ']';
 402         acct_str[i++] = '\0';
 403
 404         return acct_str;
 405 }
 406
 407 /**********************************************************
 408  Decode the account control bits from a string.
 409  **********************************************************/
 410
 411 uint16 pdb_decode_acct_ctrl(const char *p)
 412 {
 413         uint16 acct_ctrl = 0;
 414         BOOL finished = False;
 415
 416         /*
 417          * Check if the account type bits have been encoded after the
 418          * NT password (in the form [NDHTUWSLXI]).
 419          */
 420
 421         if (*p != '[')
 422                 return 0;
 423
 424         for (p++; *p && !finished; p++) {
 425                 switch (*p) {
 426                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 427                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 428                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 429                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 430                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 431                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 432                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 433                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 434                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 435                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 436                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 437             case ' ': { break; }
 438                         case ':':
 439                         case '\n':
 440                         case '\0':
 441                         case ']':
 442                         default:  { finished = True; }
 443                 }
 444         }
 445
 446         return acct_ctrl;
 447 }
 448
 449 /*************************************************************
 450  Routine to set 32 hex password characters from a 16 byte array.
 451 **************************************************************/
 452
 453 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 454 {
 455         if (pwd != NULL) {
 456                 int i;
 457                 for (i = 0; i < 16; i++)
 458                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 459         } else {
 460                 if (acct_ctrl & ACB_PWNOTREQ)
 461                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 462                 else
 463                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 464         }
 465 }
 466
 467 /*************************************************************
 468  Routine to get the 32 hex characters and turn them
 469  into a 16 byte array.
 470 **************************************************************/
 471
 472 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 473 {
 474         int i;
 475         unsigned char   lonybble, hinybble;
 476         char           *hexchars = "0123456789ABCDEF";
 477         char           *p1, *p2;
 478
 479         if (!p)
 480                 return (False);
 481
 482         for (i = 0; i < 32; i += 2) {
 483                 hinybble = toupper(p[i]);
 484                 lonybble = toupper(p[i + 1]);
 485
 486                 p1 = strchr(hexchars, hinybble);
 487                 p2 = strchr(hexchars, lonybble);
 488
 489                 if (!p1 || !p2)
 490                         return (False);
 491
 492                 hinybble = PTR_DIFF(p1, hexchars);
 493                 lonybble = PTR_DIFF(p2, hexchars);
 494
 495                 pwd[i / 2] = (hinybble << 4) | lonybble;
 496         }
 497         return (True);
 498 }
 499
 500 /*******************************************************************
 501  Converts NT user RID to a UNIX uid.
 502  ********************************************************************/
 503
 504 static int algorithmic_rid_base(void)
 505 {
 506         static int rid_offset = 0;
 507
 508         if (rid_offset != 0)
 509                 return rid_offset;
 510
 511         rid_offset = lp_algorithmic_rid_base();
 512
 513         if (rid_offset < BASE_RID) {
 514                 /* Try to prevent admin foot-shooting, we can't put algorithmic
 515                    rids below 1000, that's the 'well known RIDs' on NT */
 516                 DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID));
 517                 rid_offset = BASE_RID;
 518         }
 519         if (rid_offset & 1) {
 520                 DEBUG(0, ("algorithmic rid base must be even\n"));
 521                 rid_offset += 1;
 522         }
 523         return rid_offset;
 524 }
 525
 526
 527 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 528 {
 529         int rid_offset = algorithmic_rid_base();
 530         return (uid_t)(((user_rid & (~USER_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 531 }
 532
 533
 534 /*******************************************************************
 535  converts UNIX uid to an NT User RID.
 536  ********************************************************************/
 537
 538 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 539 {
 540         int rid_offset = algorithmic_rid_base();
 541         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 542 }
 543
 544 /*******************************************************************
 545  Converts NT group RID to a UNIX gid.
 546  ********************************************************************/
 547
 548 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 549 {
 550         int rid_offset = algorithmic_rid_base();
 551         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 552 }
 553
 554 /*******************************************************************
 555  converts NT Group RID to a UNIX uid.
 556
 557  warning: you must not call that function only
 558  you must do a call to the group mapping first.
 559  there is not anymore a direct link between the gid and the rid.
 560  ********************************************************************/
 561
 562 uint32 pdb_gid_to_group_rid(gid_t gid)
 563 {
 564         int rid_offset = algorithmic_rid_base();
 565         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 566 }
 567
 568 /*******************************************************************
 569  Decides if a RID is a well known RID.
 570  ********************************************************************/
 571
 572 static BOOL pdb_rid_is_well_known(uint32 rid)
 573 {
 574         /* Not using rid_offset here, becouse this is the actual
 575            NT fixed value (1000) */
 576
 577         return (rid < BASE_RID);
 578 }
 579
 580 /*******************************************************************
 581  Decides if a RID is a user or group RID.
 582  ********************************************************************/
 583
 584 BOOL pdb_rid_is_user(uint32 rid)
 585 {
 586   /* lkcl i understand that NT attaches an enumeration to a RID
 587    * such that it can be identified as either a user, group etc
 588    * type.  there are 5 such categories, and they are documented.
 589    */
 590         /* However, they are not in the RID, just somthing you can query
 591            seperatly.  Sorry luke :-) */
 592
 593    if(pdb_rid_is_well_known(rid)) {
 594       /*
 595        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 596        * and DOMAIN_USER_RID_GUEST.
 597        */
 598      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 599        return True;
 600    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 601      return True;
 602    }
 603    return False;
 604 }
 605
 606 /*******************************************************************
 607  Convert a rid into a name. Used in the lookup SID rpc.
 608  ********************************************************************/
 609
 610 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 611 {
 612         uint32 rid;
 613         SAM_ACCOUNT *sam_account = NULL;
 614         GROUP_MAP map;
 615
 616         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 617                 DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 618                         sid_string_static(&map.sid)));
 619                 return False;
 620         }
 621         *psid_name_use = SID_NAME_UNKNOWN;
 622
 623         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 624
 625         if (rid == DOMAIN_USER_RID_ADMIN) {
 626                 const char **admin_list = lp_admin_users(-1);
 627                 *psid_name_use = SID_NAME_USER;
 628                 if (admin_list) {
 629                         const char *p = *admin_list;
 630                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 631                                 fstrcpy(name, "Administrator");
 632                 } else {
 633                         fstrcpy(name, "Administrator");
 634                 }
 635                 return True;
 636         }
 637
 638         /*
 639          * Don't try to convert the rid to a name if
 640          * running in appliance mode
 641          */
 642
 643         if (lp_hide_local_users())
 644                 return False;
 645
 646         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 647                 return False;
 648         }
 649
 650         /* This now does the 'generic' mapping in pdb_unix */
 651         /* 'guest' is also handled there */
 652         if (pdb_getsampwsid(sam_account, sid)) {
 653                 fstrcpy(name, pdb_get_username(sam_account));
 654                 *psid_name_use = SID_NAME_USER;
 655
 656                 pdb_free_sam(&sam_account);
 657
 658                 return True;
 659         }
 660
 661         pdb_free_sam(&sam_account);
 662
 663         if (pdb_getgrsid(&map, *sid, MAPPING_WITHOUT_PRIV)) {
 664                 if (map.gid!=-1) {
 665                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 666                 } else {
 667                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 668                 }
 669
 670                 fstrcpy(name, map.nt_name);
 671                 *psid_name_use = map.sid_name_use;
 672                 return True;
 673         }
 674
 675         if (pdb_rid_is_user(rid)) {
 676                 uid_t uid;
 677
 678                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 679
 680                 uid = fallback_pdb_user_rid_to_uid(rid);
 681                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 682
 683                 return False;  /* Indicates that this user was 'not mapped' */
 684         } else {
 685                 gid_t gid;
 686                 struct group *gr;
 687
 688                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 689
 690                 gid = pdb_group_rid_to_gid(rid);
 691                 gr = getgrgid(gid);
 692
 693                 *psid_name_use = SID_NAME_ALIAS;
 694
 695                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 696                          gr ? "succeeded" : "failed" ));
 697
 698                 if(!gr) {
 699                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 700                         return False; /* Indicates that this group was 'not mapped' */
 701                 }
 702
 703                 fstrcpy( name, gr->gr_name);
 704
 705                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 706                          (unsigned int)rid ));
 707                 return True;
 708         }
 709 }
 710
 711 /*******************************************************************
 712  Convert a name into a SID. Used in the lookup name rpc.
 713  ********************************************************************/
 714
 715 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 716 {
 717         extern DOM_SID global_sid_World_Domain;
 718         DOM_SID local_sid;
 719         fstring user;
 720         SAM_ACCOUNT *sam_account = NULL;
 721         struct group *grp;
 722         GROUP_MAP map;
 723
 724         *psid_name_use = SID_NAME_UNKNOWN;
 725
 726         /*
 727          * user may be quoted a const string, and map_username and
 728          * friends can modify it. Make a modifiable copy. JRA.
 729          */
 730
 731         fstrcpy(user, c_user);
 732
 733         sid_copy(&local_sid, get_global_sam_sid());
 734
 735         /*
 736          * Special case for MACHINE\Everyone. Map to the world_sid.
 737          */
 738
 739         if(strequal(user, "Everyone")) {
 740                 sid_copy( psid, &global_sid_World_Domain);
 741                 sid_append_rid(psid, 0);
 742                 *psid_name_use = SID_NAME_ALIAS;
 743                 return True;
 744         }
 745
 746         /*
 747          * Don't lookup local unix users if running in appliance mode
 748          */
 749         if (lp_hide_local_users())
 750                 return False;
 751
 752         (void)map_username(user);
 753
 754         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 755                 return False;
 756         }
 757
 758         if (pdb_getsampwnam(sam_account, user)) {
 759                 sid_copy(psid, pdb_get_user_sid(sam_account));
 760                 *psid_name_use = SID_NAME_USER;
 761
 762                 pdb_free_sam(&sam_account);
 763                 return True;
 764         }
 765
 766         pdb_free_sam(&sam_account);
 767
 768         /*
 769          * Maybe it was a group ?
 770          */
 771
 772         /* check if it's a mapped group */
 773         if (pdb_getgrnam(&map, user, MAPPING_WITHOUT_PRIV)) {
 774                 /* yes it's a mapped group */
 775                 sid_copy(&local_sid, &map.sid);
 776                 *psid_name_use = map.sid_name_use;
 777         } else {
 778                 /* it's not a mapped group */
 779                 grp = getgrnam(user);
 780                 if(!grp)
 781                         return False;
 782
 783                 /*
 784                  *check if it's mapped, if it is reply it doesn't exist
 785                  *
 786                  * that's to prevent this case:
 787                  *
 788                  * unix group ug is mapped to nt group ng
 789                  * someone does a lookup on ug
 790                  * we must not reply as it doesn't "exist" anymore
 791                  * for NT. For NT only ng exists.
 792                  * JFM, 30/11/2001
 793                  */
 794
 795                 if (pdb_getgrgid(&map, grp->gr_gid, MAPPING_WITHOUT_PRIV)){
 796                         return False;
 797                 }
 798
 799                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 800                 *psid_name_use = SID_NAME_ALIAS;
 801         }
 802
 803         sid_copy( psid, &local_sid);
 804
 805         return True;
 806 }
 807
 808 /****************************************************************************
 809  Convert a uid to SID - locally.
 810 ****************************************************************************/
 811
 812 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 813 {
 814         struct passwd *pass;
 815         SAM_ACCOUNT *sam_user = NULL;
 816         fstring str; /* sid string buffer */
 817
 818         sid_copy(psid, get_global_sam_sid());
 819
 820         if((pass = getpwuid_alloc(uid))) {
 821
 822                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) {
 823                         passwd_free(&pass);
 824                         return NULL;
 825                 }
 826
 827                 if (pdb_getsampwnam(sam_user, pass->pw_name)) {
 828                         sid_copy(psid, pdb_get_user_sid(sam_user));
 829                 } else if (strcmp(pass->pw_name, lp_guestaccount()) == 0) {
 830                         sid_append_rid(psid, DOMAIN_USER_RID_GUEST);
 831                 } else {
 832                         sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 833                 }
 834
 835                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n",
 836                           (unsigned)uid, sid_to_string( str, psid),
 837                           pass->pw_name ));
 838
 839                 passwd_free(&pass);
 840                 pdb_free_sam(&sam_user);
 841
 842         } else {
 843                 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 844
 845                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n",
 846                           (unsigned)uid, sid_to_string( str, psid)));
 847         }
 848
 849         return psid;
 850 }
 851
 852 /****************************************************************************
 853  Convert a SID to uid - locally.
 854 ****************************************************************************/
 855
 856 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 857 {
 858         fstring str;
 859         SAM_ACCOUNT *sam_user = NULL;
 860
 861         *name_type = SID_NAME_UNKNOWN;
 862
 863         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 864                 return False;
 865
 866         if (pdb_getsampwsid(sam_user, psid)) {
 867
 868                 if (!IS_SAM_SET(sam_user,PDB_UID)&&!IS_SAM_CHANGED(sam_user,PDB_UID)) {
 869                         pdb_free_sam(&sam_user);
 870                         return False;
 871                 }
 872
 873                 *puid = pdb_get_uid(sam_user);
 874
 875                 DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 876                           (unsigned int)*puid, pdb_get_username(sam_user)));
 877                 pdb_free_sam(&sam_user);
 878         } else {
 879
 880                 DOM_SID dom_sid;
 881                 uint32 rid;
 882                 GROUP_MAP map;
 883
 884                 pdb_free_sam(&sam_user);
 885
 886                 if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
 887                         DEBUG(3, ("local_sid_to_uid: SID '%s' is a group, not a user... \n", sid_to_string(str, psid)));
 888                         /* It's a group, not a user... */
 889                         return False;
 890                 }
 891
 892                 sid_copy(&dom_sid, psid);
 893                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 894                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 895                         return False;
 896                 }
 897
 898                 if (!pdb_rid_is_user(rid)) {
 899                         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)));
 900                         return False;
 901                 }
 902
 903                 *puid = fallback_pdb_user_rid_to_uid(rid);
 904
 905                 DEBUG(5,("local_sid_to_uid: SID %s algorithmicly mapped to %ld mapped becouse SID was not found in passdb.\n",
 906                          sid_to_string(str, psid), (signed long int)(*puid)));
 907         }
 908
 909         *name_type = SID_NAME_USER;
 910
 911         return True;
 912 }
 913
 914 /****************************************************************************
 915  Convert a gid to SID - locally.
 916 ****************************************************************************/
 917
 918 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 919 {
 920         GROUP_MAP map;
 921
 922         sid_copy(psid, get_global_sam_sid());
 923
 924         if (pdb_getgrgid(&map, gid, MAPPING_WITHOUT_PRIV)) {
 925                 sid_copy(psid, &map.sid);
 926         }
 927         else {
 928                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 929         }
 930
 931         return psid;
 932 }
 933
 934 /****************************************************************************
 935  Convert a SID to gid - locally.
 936 ****************************************************************************/
 937
 938 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 939 {
 940         fstring str;
 941         GROUP_MAP map;
 942
 943         *name_type = SID_NAME_UNKNOWN;
 944
 945         /*
 946          * We can only convert to a gid if this is our local
 947          * Domain SID (ie. we are the controling authority).
 948          *
 949          * Or in the Builtin SID too. JFM, 11/30/2001
 950          */
 951
 952         if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
 953
 954                 /* the SID is in the mapping table but not mapped */
 955                 if (map.gid==-1)
 956                         return False;
 957
 958                 *pgid = map.gid;
 959                 *name_type = map.sid_name_use;
 960                 DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n",
 961                           sid_to_string( str, psid),
 962                           map.nt_name, (unsigned int)*pgid));
 963
 964         } else {
 965                 uint32 rid;
 966                 SAM_ACCOUNT *sam_user = NULL;
 967                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 968                         return False;
 969
 970                 if (pdb_getsampwsid(sam_user, psid)) {
 971                         return False;
 972                         pdb_free_sam(&sam_user);
 973                 }
 974
 975                 pdb_free_sam(&sam_user);
 976
 977                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 978                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 979                         return False;
 980                 }
 981
 982                 if (pdb_rid_is_user(rid))
 983                         return False;
 984
 985                 *pgid = pdb_group_rid_to_gid(rid);
 986                 *name_type = SID_NAME_ALIAS;
 987                 DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid),
 988                           (unsigned int)*pgid));
 989         }
 990
 991         return True;
 992 }
 993
 994 /**
 995  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 996  * @return static buffer containing the converted string
 997  **/
 998
 999 const char *pdb_unistr2_convert(const UNISTR2 *from)
1000 {
1001         static pstring convert_buffer;
1002         *convert_buffer = 0;
1003         if (!from) {
1004                 return NULL;
1005         }
1006
1007         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
1008         return convert_buffer;
1009 }
1010
1011 /*************************************************************
1012  Change a password entry in the local smbpasswd file.
1013
1014  FIXME!!  The function needs to be abstracted into the
1015  passdb interface or something.  It is currently being called
1016  by _api_samr_create_user() in rpc_server/srv_samr.c,
1017  in SWAT and by smbpasswd/pdbedit.
1018
1019  --jerry
1020  *************************************************************/
1021
1022 BOOL local_password_change(const char *user_name, int local_flags,
1023                            const char *new_passwd,
1024                            char *err_str, size_t err_str_len,
1025                            char *msg_str, size_t msg_str_len)
1026 {
1027         struct passwd  *pwd = NULL;
1028         SAM_ACCOUNT     *sam_pass=NULL;
1029         uint16 other_acb;
1030
1031         *err_str = '\0';
1032         *msg_str = '\0';
1033
1034         /* Get the smb passwd entry for this user */
1035         pdb_init_sam(&sam_pass);
1036         if(!pdb_getsampwnam(sam_pass, user_name)) {
1037                 pdb_free_sam(&sam_pass);
1038
1039                 if (local_flags & LOCAL_ADD_USER) {
1040                         pwd = getpwnam_alloc(user_name);
1041                 } else if (local_flags & LOCAL_DELETE_USER) {
1042                         /* Might not exist in /etc/passwd */
1043                 } else {
1044                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1045                         return False;
1046                 }
1047
1048                 if (pwd) {
1049                         /* Local user found, so init from this */
1050                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1051                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1052                                 passwd_free(&pwd);
1053                                 return False;
1054                         }
1055
1056                         passwd_free(&pwd);
1057                 } else {
1058                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1059                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1060                                 return False;
1061                         }
1062
1063                         if (!pdb_set_username(sam_pass, user_name, PDB_CHANGED)) {
1064                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1065                                 pdb_free_sam(&sam_pass);
1066                                 return False;
1067                         }
1068                 }
1069         } else {
1070                 /* the entry already existed */
1071                 local_flags &= ~LOCAL_ADD_USER;
1072         }
1073
1074         /* the 'other' acb bits not being changed here */
1075         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
1076         if (local_flags & LOCAL_TRUST_ACCOUNT) {
1077                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
1078                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1079                         pdb_free_sam(&sam_pass);
1080                         return False;
1081                 }
1082         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1083                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
1084                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1085                         pdb_free_sam(&sam_pass);
1086                         return False;
1087                 }
1088         } else {
1089                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
1090                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1091                         pdb_free_sam(&sam_pass);
1092                         return False;
1093                 }
1094         }
1095
1096         /*
1097          * We are root - just write the new password
1098          * and the valid last change time.
1099          */
1100
1101         if (local_flags & LOCAL_DISABLE_USER) {
1102                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
1103                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1104                         pdb_free_sam(&sam_pass);
1105                         return False;
1106                 }
1107         } else if (local_flags & LOCAL_ENABLE_USER) {
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
1115         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1116                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
1117                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1118                         pdb_free_sam(&sam_pass);
1119                         return False;
1120                 }
1121         } else if (local_flags & LOCAL_SET_PASSWORD) {
1122                 /*
1123                  * If we're dealing with setting a completely empty user account
1124                  * ie. One with a password of 'XXXX', but not set disabled (like
1125                  * an account created from scratch) then if the old password was
1126                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1127                  * We remove that as we're giving this user their first password
1128                  * and the decision hasn't really been made to disable them (ie.
1129                  * don't create them disabled). JRA.
1130                  */
1131                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1132                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1133                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1134                                 pdb_free_sam(&sam_pass);
1135                                 return False;
1136                         }
1137                 }
1138                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
1139                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1140                         pdb_free_sam(&sam_pass);
1141                         return False;
1142                 }
1143
1144                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1145                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1146                         pdb_free_sam(&sam_pass);
1147                         return False;
1148                 }
1149         }
1150
1151         if (local_flags & LOCAL_ADD_USER) {
1152                 if (pdb_add_sam_account(sam_pass)) {
1153                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1154                         pdb_free_sam(&sam_pass);
1155                         return True;
1156                 } else {
1157                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1158                         pdb_free_sam(&sam_pass);
1159                         return False;
1160                 }
1161         } else if (local_flags & LOCAL_DELETE_USER) {
1162                 if (!pdb_delete_sam_account(sam_pass)) {
1163                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1164                         pdb_free_sam(&sam_pass);
1165                         return False;
1166                 }
1167                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1168         } else {
1169                 if(!pdb_update_sam_account(sam_pass)) {
1170                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1171                         pdb_free_sam(&sam_pass);
1172                         return False;
1173                 }
1174                 if(local_flags & LOCAL_DISABLE_USER)
1175                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1176                 else if (local_flags & LOCAL_ENABLE_USER)
1177                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1178                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1179                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1180         }
1181
1182         pdb_free_sam(&sam_pass);
1183         return True;
1184 }