source4/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, lp_netbios_name(),
 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, lp_netbios_name(),
 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, lp_netbios_name(),
 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, lp_netbios_name(),
 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_INVALID_PARAMETER;
 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 password 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         const 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         TALLOC_CTX *mem_ctx;
 616
 617         mem_ctx = talloc_init("local_lookup_sid");
 618         if (!mem_ctx) {
 619                 DEBUG(0,("local_sid_to_gid: No memory\n"));
 620                 return False;
 621         }
 622         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 623                 DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 624                         sid_string_talloc(mem_ctx, &map.sid)));
 625                 return False;
 626         }
 627         talloc_destroy(mem_ctx);
 628         *psid_name_use = SID_NAME_UNKNOWN;
 629
 630         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 631
 632         if (rid == DOMAIN_USER_RID_ADMIN) {
 633                 const char **admin_list = lp_admin_users(-1);
 634                 *psid_name_use = SID_NAME_USER;
 635                 if (admin_list) {
 636                         const char *p = *admin_list;
 637                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 638                                 fstrcpy(name, "Administrator");
 639                 } else {
 640                         fstrcpy(name, "Administrator");
 641                 }
 642                 return True;
 643         }
 644
 645         /*
 646          * Don't try to convert the rid to a name if
 647          * running in appliance mode
 648          */
 649
 650         if (lp_hide_local_users())
 651                 return False;
 652
 653         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 654                 return False;
 655         }
 656
 657         /* This now does the 'generic' mapping in pdb_unix */
 658         /* 'guest' is also handled there */
 659         if (pdb_getsampwsid(sam_account, sid)) {
 660                 fstrcpy(name, pdb_get_username(sam_account));
 661                 *psid_name_use = SID_NAME_USER;
 662
 663                 pdb_free_sam(&sam_account);
 664
 665                 return True;
 666         }
 667
 668         pdb_free_sam(&sam_account);
 669
 670         if (pdb_getgrsid(&map, *sid, MAPPING_WITHOUT_PRIV)) {
 671                 if (map.gid!=(gid_t)-1) {
 672                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 673                 } else {
 674                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 675                 }
 676
 677                 fstrcpy(name, map.nt_name);
 678                 *psid_name_use = map.sid_name_use;
 679                 return True;
 680         }
 681
 682         if (pdb_rid_is_user(rid)) {
 683                 uid_t uid;
 684
 685                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 686
 687                 uid = fallback_pdb_user_rid_to_uid(rid);
 688                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 689
 690                 return False;  /* Indicates that this user was 'not mapped' */
 691         } else {
 692                 gid_t gid;
 693                 struct group *gr;
 694
 695                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 696
 697                 gid = pdb_group_rid_to_gid(rid);
 698                 gr = getgrgid(gid);
 699
 700                 *psid_name_use = SID_NAME_ALIAS;
 701
 702                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 703                          gr ? "succeeded" : "failed" ));
 704
 705                 if(!gr) {
 706                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 707                         return False; /* Indicates that this group was 'not mapped' */
 708                 }
 709
 710                 fstrcpy( name, gr->gr_name);
 711
 712                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 713                          (unsigned int)rid ));
 714                 return True;
 715         }
 716 }
 717
 718 /*******************************************************************
 719  Convert a name into a SID. Used in the lookup name rpc.
 720  ********************************************************************/
 721
 722 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 723 {
 724         extern DOM_SID global_sid_World_Domain;
 725         DOM_SID local_sid;
 726         fstring user;
 727         SAM_ACCOUNT *sam_account = NULL;
 728         struct group *grp;
 729         GROUP_MAP map;
 730
 731         *psid_name_use = SID_NAME_UNKNOWN;
 732
 733         /*
 734          * user may be quoted a const string, and map_username and
 735          * friends can modify it. Make a modifiable copy. JRA.
 736          */
 737
 738         fstrcpy(user, c_user);
 739
 740         sid_copy(&local_sid, get_global_sam_sid());
 741
 742         /*
 743          * Special case for MACHINE\Everyone. Map to the world_sid.
 744          */
 745
 746         if(strequal(user, "Everyone")) {
 747                 sid_copy( psid, &global_sid_World_Domain);
 748                 sid_append_rid(psid, 0);
 749                 *psid_name_use = SID_NAME_ALIAS;
 750                 return True;
 751         }
 752
 753         /*
 754          * Don't lookup local unix users if running in appliance mode
 755          */
 756         if (lp_hide_local_users())
 757                 return False;
 758
 759         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 760                 return False;
 761         }
 762
 763         if (pdb_getsampwnam(sam_account, user)) {
 764                 sid_copy(psid, pdb_get_user_sid(sam_account));
 765                 *psid_name_use = SID_NAME_USER;
 766
 767                 pdb_free_sam(&sam_account);
 768                 return True;
 769         }
 770
 771         pdb_free_sam(&sam_account);
 772
 773         /*
 774          * Maybe it was a group ?
 775          */
 776
 777         /* check if it's a mapped group */
 778         if (pdb_getgrnam(&map, user, MAPPING_WITHOUT_PRIV)) {
 779                 /* yes it's a mapped group */
 780                 sid_copy(&local_sid, &map.sid);
 781                 *psid_name_use = map.sid_name_use;
 782         } else {
 783                 /* it's not a mapped group */
 784                 grp = getgrnam(user);
 785                 if(!grp)
 786                         return False;
 787
 788                 /*
 789                  *check if it's mapped, if it is reply it doesn't exist
 790                  *
 791                  * that's to prevent this case:
 792                  *
 793                  * unix group ug is mapped to nt group ng
 794                  * someone does a lookup on ug
 795                  * we must not reply as it doesn't "exist" anymore
 796                  * for NT. For NT only ng exists.
 797                  * JFM, 30/11/2001
 798                  */
 799
 800                 if (pdb_getgrgid(&map, grp->gr_gid, MAPPING_WITHOUT_PRIV)){
 801                         return False;
 802                 }
 803
 804                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 805                 *psid_name_use = SID_NAME_ALIAS;
 806         }
 807
 808         sid_copy( psid, &local_sid);
 809
 810         return True;
 811 }
 812
 813 /****************************************************************************
 814  Convert a uid to SID - locally.
 815 ****************************************************************************/
 816
 817 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 818 {
 819         struct passwd *pass;
 820         SAM_ACCOUNT *sam_user = NULL;
 821         fstring str; /* sid string buffer */
 822
 823         sid_copy(psid, get_global_sam_sid());
 824
 825         if((pass = getpwuid_alloc(uid))) {
 826
 827                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) {
 828                         passwd_free(&pass);
 829                         return NULL;
 830                 }
 831
 832                 if (pdb_getsampwnam(sam_user, pass->pw_name)) {
 833                         sid_copy(psid, pdb_get_user_sid(sam_user));
 834                 } else {
 835                         sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 836                 }
 837
 838                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n",
 839                           (unsigned)uid, sid_to_string( str, psid),
 840                           pass->pw_name ));
 841
 842                 passwd_free(&pass);
 843                 pdb_free_sam(&sam_user);
 844
 845         } else {
 846                 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 847
 848                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n",
 849                           (unsigned)uid, sid_to_string( str, psid)));
 850         }
 851
 852         return psid;
 853 }
 854
 855 /****************************************************************************
 856  Convert a SID to uid - locally.
 857 ****************************************************************************/
 858
 859 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 860 {
 861         fstring str;
 862         SAM_ACCOUNT *sam_user = NULL;
 863
 864         *name_type = SID_NAME_UNKNOWN;
 865
 866         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 867                 return False;
 868
 869         if (pdb_getsampwsid(sam_user, psid)) {
 870
 871                 if (!IS_SAM_SET(sam_user,PDB_UID)&&!IS_SAM_CHANGED(sam_user,PDB_UID)) {
 872                         pdb_free_sam(&sam_user);
 873                         return False;
 874                 }
 875
 876                 *puid = pdb_get_uid(sam_user);
 877
 878                 DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 879                           (unsigned int)*puid, pdb_get_username(sam_user)));
 880                 pdb_free_sam(&sam_user);
 881         } else {
 882
 883                 DOM_SID dom_sid;
 884                 uint32 rid;
 885                 GROUP_MAP map;
 886
 887                 pdb_free_sam(&sam_user);
 888
 889                 if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
 890                         DEBUG(3, ("local_sid_to_uid: SID '%s' is a group, not a user... \n", sid_to_string(str, psid)));
 891                         /* It's a group, not a user... */
 892                         return False;
 893                 }
 894
 895                 sid_copy(&dom_sid, psid);
 896                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 897                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 898                         return False;
 899                 }
 900
 901                 if (!pdb_rid_is_user(rid)) {
 902                         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)));
 903                         return False;
 904                 }
 905
 906                 *puid = fallback_pdb_user_rid_to_uid(rid);
 907
 908                 DEBUG(5,("local_sid_to_uid: SID %s algorithmicly mapped to %ld mapped becouse SID was not found in passdb.\n",
 909                          sid_to_string(str, psid), (signed long int)(*puid)));
 910         }
 911
 912         *name_type = SID_NAME_USER;
 913
 914         return True;
 915 }
 916
 917 /****************************************************************************
 918  Convert a gid to SID - locally.
 919 ****************************************************************************/
 920
 921 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 922 {
 923         GROUP_MAP map;
 924
 925         sid_copy(psid, get_global_sam_sid());
 926
 927         if (pdb_getgrgid(&map, gid, MAPPING_WITHOUT_PRIV)) {
 928                 sid_copy(psid, &map.sid);
 929         }
 930         else {
 931                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 932         }
 933
 934         return psid;
 935 }
 936
 937 /****************************************************************************
 938  Convert a SID to gid - locally.
 939 ****************************************************************************/
 940
 941 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 942 {
 943         fstring str;
 944         GROUP_MAP map;
 945
 946         *name_type = SID_NAME_UNKNOWN;
 947
 948         /*
 949          * We can only convert to a gid if this is our local
 950          * Domain SID (ie. we are the controling authority).
 951          *
 952          * Or in the Builtin SID too. JFM, 11/30/2001
 953          */
 954
 955         if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
 956
 957                 /* the SID is in the mapping table but not mapped */
 958                 if (map.gid==(gid_t)-1)
 959                         return False;
 960
 961                 *pgid = map.gid;
 962                 *name_type = map.sid_name_use;
 963                 DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n",
 964                           sid_to_string( str, psid),
 965                           map.nt_name, (unsigned int)*pgid));
 966
 967         } else {
 968                 uint32 rid;
 969                 SAM_ACCOUNT *sam_user = NULL;
 970                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 971                         return False;
 972
 973                 if (pdb_getsampwsid(sam_user, psid)) {
 974                         return False;
 975                         pdb_free_sam(&sam_user);
 976                 }
 977
 978                 pdb_free_sam(&sam_user);
 979
 980                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 981                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 982                         return False;
 983                 }
 984
 985                 if (pdb_rid_is_user(rid))
 986                         return False;
 987
 988                 *pgid = pdb_group_rid_to_gid(rid);
 989                 *name_type = SID_NAME_ALIAS;
 990                 DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid),
 991                           (unsigned int)*pgid));
 992         }
 993
 994         return True;
 995 }
 996
 997 /*************************************************************
 998  Change a password entry in the local smbpasswd file.
 999
1000 It is currently being called by SWAT and by smbpasswd.
1001
1002  --jerry
1003  *************************************************************/
1004
1005 BOOL local_password_change(const char *user_name, int local_flags,
1006                            const char *new_passwd,
1007                            char *err_str, size_t err_str_len,
1008                            char *msg_str, size_t msg_str_len)
1009 {
1010         struct passwd  *pwd = NULL;
1011         SAM_ACCOUNT     *sam_pass=NULL;
1012         uint16 other_acb;
1013
1014         *err_str = '\0';
1015         *msg_str = '\0';
1016
1017         /* Get the smb passwd entry for this user */
1018         pdb_init_sam(&sam_pass);
1019         if(!pdb_getsampwnam(sam_pass, user_name)) {
1020                 pdb_free_sam(&sam_pass);
1021
1022                 if (local_flags & LOCAL_ADD_USER) {
1023                         pwd = getpwnam_alloc(user_name);
1024                 } else if (local_flags & LOCAL_DELETE_USER) {
1025                         /* Might not exist in /etc/passwd */
1026                 } else {
1027                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1028                         return False;
1029                 }
1030
1031                 if (pwd) {
1032                         /* Local user found, so init from this */
1033                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1034                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1035                                 passwd_free(&pwd);
1036                                 return False;
1037                         }
1038
1039                         passwd_free(&pwd);
1040                 } else {
1041                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1042                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1043                                 return False;
1044                         }
1045
1046                         if (!pdb_set_username(sam_pass, user_name, PDB_CHANGED)) {
1047                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1048                                 pdb_free_sam(&sam_pass);
1049                                 return False;
1050                         }
1051                 }
1052         } else {
1053                 /* the entry already existed */
1054                 local_flags &= ~LOCAL_ADD_USER;
1055         }
1056
1057         /* the 'other' acb bits not being changed here */
1058         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
1059         if (local_flags & LOCAL_TRUST_ACCOUNT) {
1060                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
1061                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1062                         pdb_free_sam(&sam_pass);
1063                         return False;
1064                 }
1065         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1066                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
1067                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1068                         pdb_free_sam(&sam_pass);
1069                         return False;
1070                 }
1071         } else {
1072                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
1073                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1074                         pdb_free_sam(&sam_pass);
1075                         return False;
1076                 }
1077         }
1078
1079         /*
1080          * We are root - just write the new password
1081          * and the valid last change time.
1082          */
1083
1084         if (local_flags & LOCAL_DISABLE_USER) {
1085                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
1086                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1087                         pdb_free_sam(&sam_pass);
1088                         return False;
1089                 }
1090         } else if (local_flags & LOCAL_ENABLE_USER) {
1091                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1092                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1093                         pdb_free_sam(&sam_pass);
1094                         return False;
1095                 }
1096         }
1097
1098         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1099                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
1100                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1101                         pdb_free_sam(&sam_pass);
1102                         return False;
1103                 }
1104         } else if (local_flags & LOCAL_SET_PASSWORD) {
1105                 /*
1106                  * If we're dealing with setting a completely empty user account
1107                  * ie. One with a password of 'XXXX', but not set disabled (like
1108                  * an account created from scratch) then if the old password was
1109                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1110                  * We remove that as we're giving this user their first password
1111                  * and the decision hasn't really been made to disable them (ie.
1112                  * don't create them disabled). JRA.
1113                  */
1114                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1115                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1116                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1117                                 pdb_free_sam(&sam_pass);
1118                                 return False;
1119                         }
1120                 }
1121                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
1122                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1123                         pdb_free_sam(&sam_pass);
1124                         return False;
1125                 }
1126
1127                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1128                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1129                         pdb_free_sam(&sam_pass);
1130                         return False;
1131                 }
1132         }
1133
1134         if (local_flags & LOCAL_ADD_USER) {
1135                 if (pdb_add_sam_account(sam_pass)) {
1136                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1137                         pdb_free_sam(&sam_pass);
1138                         return True;
1139                 } else {
1140                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1141                         pdb_free_sam(&sam_pass);
1142                         return False;
1143                 }
1144         } else if (local_flags & LOCAL_DELETE_USER) {
1145                 if (!pdb_delete_sam_account(sam_pass)) {
1146                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1147                         pdb_free_sam(&sam_pass);
1148                         return False;
1149                 }
1150                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1151         } else {
1152                 if(!pdb_update_sam_account(sam_pass)) {
1153                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1154                         pdb_free_sam(&sam_pass);
1155                         return False;
1156                 }
1157                 if(local_flags & LOCAL_DISABLE_USER)
1158                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1159                 else if (local_flags & LOCAL_ENABLE_USER)
1160                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1161                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1162                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1163         }
1164
1165         pdb_free_sam(&sam_pass);
1166         return True;
1167 }