source3/passdb/passdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Jeremy Allison                 1996-2001
   5    Copyright (C) Luke Kenneth Casson Leighton   1996-1998
   6    Copyright (C) Gerald (Jerry) Carter          2000-2001
   7    Copyright (C) Andrew Bartlett                2001-2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_PASSDB
  28
  29 /*
  30  * This is set on startup - it defines the SID for this
  31  * machine, and therefore the SAM database for which it is
  32  * responsible.
  33  */
  34
  35 extern pstring global_myname;
  36
  37 /************************************************************
  38  Fill the SAM_ACCOUNT with default values.
  39  ***********************************************************/
  40
  41 static void pdb_fill_default_sam(SAM_ACCOUNT *user)
  42 {
  43         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  44
  45         /* Don't change these timestamp settings without a good reason.
  46            They are important for NT member server compatibility. */
  47
  48         user->private.init_flag             = FLAG_SAM_UNINIT;
  49         user->private.uid = user->private.gid       = -1;
  50
  51         user->private.logon_time            = (time_t)0;
  52         user->private.pass_last_set_time    = (time_t)0;
  53         user->private.pass_can_change_time  = (time_t)0;
  54         user->private.logoff_time           =
  55         user->private.kickoff_time          =
  56         user->private.pass_must_change_time = get_time_t_max();
  57         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  58         user->private.logon_divs = 168;         /* hours per week */
  59         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  60         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  61         user->private.unknown_5 = 0x00000000; /* don't know */
  62         user->private.unknown_6 = 0x000004ec; /* don't know */
  63
  64         /* Some parts of samba strlen their pdb_get...() returns,
  65            so this keeps the interface unchanged for now. */
  66
  67         user->private.username = "";
  68         user->private.domain = "";
  69         user->private.nt_username = "";
  70         user->private.full_name = "";
  71         user->private.home_dir = "";
  72         user->private.logon_script = "";
  73         user->private.profile_path = "";
  74         user->private.acct_desc = "";
  75         user->private.workstations = "";
  76         user->private.unknown_str = "";
  77         user->private.munged_dial = "";
  78
  79         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_named("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);
 181         pdb_set_fullname(sam_account, pwd->pw_gecos);
 182
 183         pdb_set_unix_homedir(sam_account, pwd->pw_dir);
 184
 185         pdb_set_domain (sam_account, lp_workgroup());
 186
 187         pdb_set_uid(sam_account, pwd->pw_uid);
 188         pdb_set_gid(sam_account, pwd->pw_gid);
 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)) {
 204                         return NT_STATUS_UNSUCCESSFUL;
 205                 }
 206                 if (!pdb_set_group_sid_from_rid(sam_account, DOMAIN_GROUP_RID_GUESTS)) {
 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))) {
 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(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 219                         if (!pdb_set_group_sid(sam_account,&map.sid)){
 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))) {
 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                                      False);
 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                                 False);
 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                                   False);
 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                                      False);
 262                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL)) {
 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)) {
 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 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 505 {
 506         int rid_offset = lp_algorithmic_rid_base();
 507         return (uid_t)(((user_rid & (~USER_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 508 }
 509
 510
 511 /*******************************************************************
 512  converts UNIX uid to an NT User RID.
 513  ********************************************************************/
 514
 515 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 516 {
 517         int rid_offset = lp_algorithmic_rid_base();
 518         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 519 }
 520
 521 /*******************************************************************
 522  Converts NT group RID to a UNIX gid.
 523  ********************************************************************/
 524
 525 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 526 {
 527         int rid_offset = lp_algorithmic_rid_base();
 528         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 529 }
 530
 531 /*******************************************************************
 532  converts NT Group RID to a UNIX uid.
 533
 534  warning: you must not call that function only
 535  you must do a call to the group mapping first.
 536  there is not anymore a direct link between the gid and the rid.
 537  ********************************************************************/
 538
 539 uint32 pdb_gid_to_group_rid(gid_t gid)
 540 {
 541         int rid_offset = lp_algorithmic_rid_base();
 542         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 543 }
 544
 545 /*******************************************************************
 546  Decides if a RID is a well known RID.
 547  ********************************************************************/
 548
 549 static BOOL pdb_rid_is_well_known(uint32 rid)
 550 {
 551         /* Not using rid_offset here, becouse this is the actual
 552            NT fixed value (1000) */
 553
 554         return (rid < BASE_RID);
 555 }
 556
 557 /*******************************************************************
 558  Decides if a RID is a user or group RID.
 559  ********************************************************************/
 560
 561 BOOL pdb_rid_is_user(uint32 rid)
 562 {
 563   /* lkcl i understand that NT attaches an enumeration to a RID
 564    * such that it can be identified as either a user, group etc
 565    * type.  there are 5 such categories, and they are documented.
 566    */
 567         /* However, they are not in the RID, just somthing you can query
 568            seperatly.  Sorry luke :-) */
 569
 570    if(pdb_rid_is_well_known(rid)) {
 571       /*
 572        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 573        * and DOMAIN_USER_RID_GUEST.
 574        */
 575      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 576        return True;
 577    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 578      return True;
 579    }
 580    return False;
 581 }
 582
 583 /*******************************************************************
 584  Convert a rid into a name. Used in the lookup SID rpc.
 585  ********************************************************************/
 586
 587 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 588 {
 589         uint32 rid;
 590         SAM_ACCOUNT *sam_account = NULL;
 591         GROUP_MAP map;
 592
 593         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 594                 DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 595                         sid_string_static(&map.sid)));
 596                 return False;
 597         }
 598         *psid_name_use = SID_NAME_UNKNOWN;
 599
 600         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 601
 602         if (rid == DOMAIN_USER_RID_ADMIN) {
 603                 char **admin_list = lp_admin_users(-1);
 604                 *psid_name_use = SID_NAME_USER;
 605                 if (admin_list) {
 606                         char *p = *admin_list;
 607                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 608                                 fstrcpy(name, "Administrator");
 609                 } else {
 610                         fstrcpy(name, "Administrator");
 611                 }
 612                 return True;
 613         }
 614
 615         /*
 616          * Don't try to convert the rid to a name if
 617          * running in appliance mode
 618          */
 619
 620         if (lp_hide_local_users())
 621                 return False;
 622
 623         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 624                 return False;
 625         }
 626
 627         /* This now does the 'generic' mapping in pdb_unix */
 628         /* 'guest' is also handled there */
 629         if (pdb_getsampwsid(sam_account, sid)) {
 630                 fstrcpy(name, pdb_get_username(sam_account));
 631                 *psid_name_use = SID_NAME_USER;
 632
 633                 pdb_free_sam(&sam_account);
 634
 635                 return True;
 636         }
 637
 638         pdb_free_sam(&sam_account);
 639
 640         if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 641                 if (map.gid!=-1) {
 642                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 643                 } else {
 644                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 645                 }
 646
 647                 fstrcpy(name, map.nt_name);
 648                 *psid_name_use = map.sid_name_use;
 649                 return True;
 650         }
 651
 652         if (pdb_rid_is_user(rid)) {
 653                 uid_t uid;
 654
 655                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 656
 657                 uid = fallback_pdb_user_rid_to_uid(rid);
 658                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 659
 660                 return False;  /* Indicates that this user was 'not mapped' */
 661         } else {
 662                 gid_t gid;
 663                 struct group *gr;
 664
 665                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 666
 667                 gid = pdb_group_rid_to_gid(rid);
 668                 gr = getgrgid(gid);
 669
 670                 *psid_name_use = SID_NAME_ALIAS;
 671
 672                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 673                          gr ? "succeeded" : "failed" ));
 674
 675                 if(!gr) {
 676                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 677                         return False; /* Indicates that this group was 'not mapped' */
 678                 }
 679
 680                 fstrcpy( name, gr->gr_name);
 681
 682                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 683                          (unsigned int)rid ));
 684                 return True;
 685         }
 686 }
 687
 688 /*******************************************************************
 689  Convert a name into a SID. Used in the lookup name rpc.
 690  ********************************************************************/
 691
 692 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 693 {
 694         extern DOM_SID global_sid_World_Domain;
 695         DOM_SID local_sid;
 696         fstring user;
 697         SAM_ACCOUNT *sam_account = NULL;
 698         struct group *grp;
 699         GROUP_MAP map;
 700
 701         *psid_name_use = SID_NAME_UNKNOWN;
 702
 703         /*
 704          * user may be quoted a const string, and map_username and
 705          * friends can modify it. Make a modifiable copy. JRA.
 706          */
 707
 708         fstrcpy(user, c_user);
 709
 710         sid_copy(&local_sid, get_global_sam_sid());
 711
 712         /*
 713          * Special case for MACHINE\Everyone. Map to the world_sid.
 714          */
 715
 716         if(strequal(user, "Everyone")) {
 717                 sid_copy( psid, &global_sid_World_Domain);
 718                 sid_append_rid(psid, 0);
 719                 *psid_name_use = SID_NAME_ALIAS;
 720                 return True;
 721         }
 722
 723         /*
 724          * Don't lookup local unix users if running in appliance mode
 725          */
 726         if (lp_hide_local_users())
 727                 return False;
 728
 729         (void)map_username(user);
 730
 731         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 732                 return False;
 733         }
 734
 735         if (pdb_getsampwnam(sam_account, user)) {
 736                 sid_copy(psid, pdb_get_user_sid(sam_account));
 737                 *psid_name_use = SID_NAME_USER;
 738
 739                 pdb_free_sam(&sam_account);
 740                 return True;
 741         }
 742
 743         pdb_free_sam(&sam_account);
 744
 745         /*
 746          * Maybe it was a group ?
 747          */
 748
 749         /* check if it's a mapped group */
 750         if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 751                 /* yes it's a mapped group */
 752                 sid_copy(&local_sid, &map.sid);
 753                 *psid_name_use = map.sid_name_use;
 754         } else {
 755                 /* it's not a mapped group */
 756                 grp = getgrnam(user);
 757                 if(!grp)
 758                         return False;
 759
 760                 /*
 761                  *check if it's mapped, if it is reply it doesn't exist
 762                  *
 763                  * that's to prevent this case:
 764                  *
 765                  * unix group ug is mapped to nt group ng
 766                  * someone does a lookup on ug
 767                  * we must not reply as it doesn't "exist" anymore
 768                  * for NT. For NT only ng exists.
 769                  * JFM, 30/11/2001
 770                  */
 771
 772                 if (get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 773                         return False;
 774                 }
 775
 776                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 777                 *psid_name_use = SID_NAME_ALIAS;
 778         }
 779
 780         sid_copy( psid, &local_sid);
 781
 782         return True;
 783 }
 784
 785 /****************************************************************************
 786  Convert a uid to SID - locally.
 787 ****************************************************************************/
 788
 789 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 790 {
 791         struct passwd *pass;
 792         SAM_ACCOUNT *sam_user = NULL;
 793         fstring str; /* sid string buffer */
 794
 795         sid_copy(psid, get_global_sam_sid());
 796
 797         if((pass = getpwuid_alloc(uid))) {
 798
 799                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) {
 800                         passwd_free(&pass);
 801                         return NULL;
 802                 }
 803
 804                 if (pdb_getsampwnam(sam_user, pass->pw_name)) {
 805                         sid_copy(psid, pdb_get_user_sid(sam_user));
 806                 } else if (strcmp(pass->pw_name, lp_guestaccount()) == 0) {
 807                         sid_append_rid(psid, DOMAIN_USER_RID_GUEST);
 808                 } else {
 809                         sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 810                 }
 811
 812                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n",
 813                           (unsigned)uid, sid_to_string( str, psid),
 814                           pass->pw_name ));
 815
 816                 passwd_free(&pass);
 817                 pdb_free_sam(&sam_user);
 818
 819         } else {
 820                 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 821
 822                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n",
 823                           (unsigned)uid, sid_to_string( str, psid)));
 824         }
 825
 826         return psid;
 827 }
 828
 829 /****************************************************************************
 830  Convert a SID to uid - locally.
 831 ****************************************************************************/
 832
 833 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 834 {
 835         fstring str;
 836         SAM_ACCOUNT *sam_user = NULL;
 837
 838         *name_type = SID_NAME_UNKNOWN;
 839
 840         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 841                 return False;
 842
 843         if (pdb_getsampwsid(sam_user, psid)) {
 844
 845                 if (!(pdb_get_init_flag(sam_user) & FLAG_SAM_UID)) {
 846                         pdb_free_sam(&sam_user);
 847                         return False;
 848                 }
 849
 850                 *puid = pdb_get_uid(sam_user);
 851
 852                 DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 853                           (unsigned int)*puid, pdb_get_username(sam_user)));
 854                 pdb_free_sam(&sam_user);
 855         } else {
 856
 857                 DOM_SID dom_sid;
 858                 uint32 rid;
 859                 GROUP_MAP map;
 860
 861                 pdb_free_sam(&sam_user);
 862
 863                 if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 864                         DEBUG(3, ("local_sid_to_uid: SID '%s' is a group, not a user... \n", sid_to_string(str, psid)));
 865                         /* It's a group, not a user... */
 866                         return False;
 867                 }
 868
 869                 sid_copy(&dom_sid, psid);
 870                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 871                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 872                         return False;
 873                 }
 874
 875                 if (!pdb_rid_is_user(rid)) {
 876                         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)));
 877                         return False;
 878                 }
 879
 880                 *puid = fallback_pdb_user_rid_to_uid(rid);
 881
 882                 DEBUG(5,("local_sid_to_uid: SID %s algorithmicly mapped to %ld mapped becouse SID was not found in passdb.\n",
 883                          sid_to_string(str, psid), (signed long int)(*puid)));
 884         }
 885
 886         *name_type = SID_NAME_USER;
 887
 888         return True;
 889 }
 890
 891 /****************************************************************************
 892  Convert a gid to SID - locally.
 893 ****************************************************************************/
 894
 895 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 896 {
 897         GROUP_MAP map;
 898
 899         sid_copy(psid, get_global_sam_sid());
 900
 901         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 902                 sid_copy(psid, &map.sid);
 903         }
 904         else {
 905                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 906         }
 907
 908         return psid;
 909 }
 910
 911 /****************************************************************************
 912  Convert a SID to gid - locally.
 913 ****************************************************************************/
 914
 915 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 916 {
 917         fstring str;
 918         GROUP_MAP map;
 919
 920         *name_type = SID_NAME_UNKNOWN;
 921
 922         /*
 923          * We can only convert to a gid if this is our local
 924          * Domain SID (ie. we are the controling authority).
 925          *
 926          * Or in the Builtin SID too. JFM, 11/30/2001
 927          */
 928
 929         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 930
 931                 /* the SID is in the mapping table but not mapped */
 932                 if (map.gid==-1)
 933                         return False;
 934
 935                 *pgid = map.gid;
 936                 *name_type = map.sid_name_use;
 937                 DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n",
 938                           sid_to_string( str, psid),
 939                           map.nt_name, (unsigned int)*pgid));
 940
 941         } else {
 942                 uint32 rid;
 943                 SAM_ACCOUNT *sam_user = NULL;
 944                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 945                         return False;
 946
 947                 if (pdb_getsampwsid(sam_user, psid)) {
 948                         return False;
 949                         pdb_free_sam(&sam_user);
 950                 }
 951
 952                 pdb_free_sam(&sam_user);
 953
 954                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 955                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 956                         return False;
 957                 }
 958
 959                 if (pdb_rid_is_user(rid))
 960                         return False;
 961
 962                 *pgid = pdb_group_rid_to_gid(rid);
 963                 *name_type = SID_NAME_ALIAS;
 964                 DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid),
 965                           (unsigned int)*pgid));
 966         }
 967
 968         return True;
 969 }
 970
 971 /**
 972  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 973  * @return static buffer containing the converted string
 974  **/
 975
 976 const char *pdb_unistr2_convert(const UNISTR2 *from)
 977 {
 978         static pstring convert_buffer;
 979         *convert_buffer = 0;
 980         if (!from) {
 981                 return NULL;
 982         }
 983
 984         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 985         return convert_buffer;
 986 }
 987
 988 /*************************************************************
 989  Change a password entry in the local smbpasswd file.
 990
 991  FIXME!!  The function needs to be abstracted into the
 992  passdb interface or something.  It is currently being called
 993  by _api_samr_create_user() in rpc_server/srv_samr.c,
 994  in SWAT and by smbpasswd/pdbedit.
 995
 996  --jerry
 997  *************************************************************/
 998
 999 BOOL local_password_change(const char *user_name, int local_flags,
1000                            const char *new_passwd,
1001                            char *err_str, size_t err_str_len,
1002                            char *msg_str, size_t msg_str_len)
1003 {
1004         struct passwd  *pwd = NULL;
1005         SAM_ACCOUNT     *sam_pass=NULL;
1006         uint16 other_acb;
1007
1008         *err_str = '\0';
1009         *msg_str = '\0';
1010
1011         /* Get the smb passwd entry for this user */
1012         pdb_init_sam(&sam_pass);
1013         if(!pdb_getsampwnam(sam_pass, user_name)) {
1014                 pdb_free_sam(&sam_pass);
1015
1016                 if (local_flags & LOCAL_ADD_USER) {
1017                         pwd = getpwnam_alloc(user_name);
1018                 } else if (local_flags & LOCAL_DELETE_USER) {
1019                         /* Might not exist in /etc/passwd */
1020                 } else {
1021                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1022                         return False;
1023                 }
1024
1025                 if (pwd) {
1026                         /* Local user found, so init from this */
1027                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1028                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1029                                 passwd_free(&pwd);
1030                                 return False;
1031                         }
1032
1033                         passwd_free(&pwd);
1034                 } else {
1035                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1036                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1037                                 return False;
1038                         }
1039
1040                         if (!pdb_set_username(sam_pass, user_name)) {
1041                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1042                                 pdb_free_sam(&sam_pass);
1043                                 return False;
1044                         }
1045                 }
1046         } else {
1047                 /* the entry already existed */
1048                 local_flags &= ~LOCAL_ADD_USER;
1049         }
1050
1051         /* the 'other' acb bits not being changed here */
1052         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
1053         if (local_flags & LOCAL_TRUST_ACCOUNT) {
1054                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb) ) {
1055                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1056                         pdb_free_sam(&sam_pass);
1057                         return False;
1058                 }
1059         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1060                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb)) {
1061                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1062                         pdb_free_sam(&sam_pass);
1063                         return False;
1064                 }
1065         } else {
1066                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb)) {
1067                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1068                         pdb_free_sam(&sam_pass);
1069                         return False;
1070                 }
1071         }
1072
1073         /*
1074          * We are root - just write the new password
1075          * and the valid last change time.
1076          */
1077
1078         if (local_flags & LOCAL_DISABLE_USER) {
1079                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED)) {
1080                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1081                         pdb_free_sam(&sam_pass);
1082                         return False;
1083                 }
1084         } else if (local_flags & LOCAL_ENABLE_USER) {
1085                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1086                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1087                         pdb_free_sam(&sam_pass);
1088                         return False;
1089                 }
1090         }
1091
1092         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1093                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ)) {
1094                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1095                         pdb_free_sam(&sam_pass);
1096                         return False;
1097                 }
1098         } else if (local_flags & LOCAL_SET_PASSWORD) {
1099                 /*
1100                  * If we're dealing with setting a completely empty user account
1101                  * ie. One with a password of 'XXXX', but not set disabled (like
1102                  * an account created from scratch) then if the old password was
1103                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1104                  * We remove that as we're giving this user their first password
1105                  * and the decision hasn't really been made to disable them (ie.
1106                  * don't create them disabled). JRA.
1107                  */
1108                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1109                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1110                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1111                                 pdb_free_sam(&sam_pass);
1112                                 return False;
1113                         }
1114                 }
1115                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ))) {
1116                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1117                         pdb_free_sam(&sam_pass);
1118                         return False;
1119                 }
1120
1121                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1122                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1123                         pdb_free_sam(&sam_pass);
1124                         return False;
1125                 }
1126         }
1127
1128         if (local_flags & LOCAL_ADD_USER) {
1129                 if (pdb_add_sam_account(sam_pass)) {
1130                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1131                         pdb_free_sam(&sam_pass);
1132                         return True;
1133                 } else {
1134                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1135                         pdb_free_sam(&sam_pass);
1136                         return False;
1137                 }
1138         } else if (local_flags & LOCAL_DELETE_USER) {
1139                 if (!pdb_delete_sam_account(sam_pass)) {
1140                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1141                         pdb_free_sam(&sam_pass);
1142                         return False;
1143                 }
1144                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1145         } else {
1146                 if(!pdb_update_sam_account(sam_pass)) {
1147                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1148                         pdb_free_sam(&sam_pass);
1149                         return False;
1150                 }
1151                 if(local_flags & LOCAL_DISABLE_USER)
1152                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1153                 else if (local_flags & LOCAL_ENABLE_USER)
1154                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1155                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1156                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1157         }
1158
1159         pdb_free_sam(&sam_pass);
1160         return True;
1161 }