source3/passdb/passdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Jeremy Allison                 1996-2001
   5    Copyright (C) Luke Kenneth Casson Leighton   1996-1998
   6    Copyright (C) Gerald (Jerry) Carter          2000-2001
   7    Copyright (C) Andrew Bartlett                2001-2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_PASSDB
  28
  29 /*
  30  * This is set on startup - it defines the SID for this
  31  * machine, and therefore the SAM database for which it is
  32  * responsible.
  33  */
  34
  35 extern pstring global_myname;
  36
  37 /************************************************************
  38  Fill the SAM_ACCOUNT with default values.
  39  ***********************************************************/
  40
  41 static void pdb_fill_default_sam(SAM_ACCOUNT *user)
  42 {
  43         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  44
  45         /* Don't change these timestamp settings without a good reason.
  46            They are important for NT member server compatibility. */
  47
  48         user->private.init_flag             = FLAG_SAM_UNINIT;
  49         user->private.uid = user->private.gid       = -1;
  50
  51         user->private.logon_time            = (time_t)0;
  52         user->private.pass_last_set_time    = (time_t)0;
  53         user->private.pass_can_change_time  = (time_t)0;
  54         user->private.logoff_time           =
  55         user->private.kickoff_time          =
  56         user->private.pass_must_change_time = get_time_t_max();
  57         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  58         user->private.logon_divs = 168;         /* hours per week */
  59         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  60         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  61         user->private.unknown_5 = 0x00000000; /* don't know */
  62         user->private.unknown_6 = 0x000004ec; /* don't know */
  63
  64         /* Some parts of samba strlen their pdb_get...() returns,
  65            so this keeps the interface unchanged for now. */
  66
  67         user->private.username = "";
  68         user->private.domain = "";
  69         user->private.nt_username = "";
  70         user->private.full_name = "";
  71         user->private.home_dir = "";
  72         user->private.logon_script = "";
  73         user->private.profile_path = "";
  74         user->private.acct_desc = "";
  75         user->private.workstations = "";
  76         user->private.unknown_str = "";
  77         user->private.munged_dial = "";
  78 }
  79
  80 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
  81 {
  82         if (*user) {
  83                 talloc_destroy((*user)->mem_ctx);
  84                 *user = NULL;
  85         }
  86 }
  87
  88
  89 /**********************************************************************
  90  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
  91 ***********************************************************************/
  92
  93 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
  94 {
  95         if (*user != NULL) {
  96                 DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n"));
  97 #if 0
  98                 smb_panic("non-NULL pointer passed to pdb_init_sam\n");
  99 #endif
 100                 return NT_STATUS_UNSUCCESSFUL;
 101         }
 102
 103         if (!mem_ctx) {
 104                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 105                 return NT_STATUS_UNSUCCESSFUL;
 106         }
 107
 108         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 109
 110         if (*user==NULL) {
 111                 DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n"));
 112                 return NT_STATUS_NO_MEMORY;
 113         }
 114
 115         (*user)->mem_ctx = mem_ctx;
 116
 117         (*user)->free_fn = NULL;
 118
 119         pdb_fill_default_sam(*user);
 120
 121         return NT_STATUS_OK;
 122 }
 123
 124
 125 /*************************************************************
 126  Alloc memory and initialises a struct sam_passwd.
 127  ************************************************************/
 128
 129 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 130 {
 131         TALLOC_CTX *mem_ctx;
 132         NTSTATUS nt_status;
 133
 134         mem_ctx = talloc_init_named("passdb internal SAM_ACCOUNT allocation");
 135
 136         if (!mem_ctx) {
 137                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 138                 return NT_STATUS_NO_MEMORY;
 139         }
 140
 141         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 142                 talloc_destroy(mem_ctx);
 143                 return nt_status;
 144         }
 145
 146         (*user)->free_fn = destroy_pdb_talloc;
 147
 148         return NT_STATUS_OK;
 149 }
 150
 151
 152 /*************************************************************
 153  Initialises a struct sam_passwd with sane values.
 154  ************************************************************/
 155
 156 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 157 {
 158         GROUP_MAP map;
 159
 160         const char *guest_account = lp_guestaccount();
 161         if (!(guest_account && *guest_account)) {
 162                 DEBUG(1, ("NULL guest account!?!?\n"));
 163                 return NT_STATUS_UNSUCCESSFUL;
 164         }
 165
 166         if (!pwd) {
 167                 return NT_STATUS_UNSUCCESSFUL;
 168         }
 169
 170         pdb_fill_default_sam(sam_account);
 171
 172         pdb_set_username(sam_account, pwd->pw_name);
 173         pdb_set_fullname(sam_account, pwd->pw_gecos);
 174
 175         pdb_set_unix_homedir(sam_account, pwd->pw_dir);
 176
 177         pdb_set_domain (sam_account, lp_workgroup());
 178
 179         pdb_set_uid(sam_account, pwd->pw_uid);
 180         pdb_set_gid(sam_account, pwd->pw_gid);
 181
 182         /* When we get a proper uid -> SID and SID -> uid allocation
 183            mechinism, we should call it here.
 184
 185            We can't just set this to 0 or allow it only to be filled
 186            in when added to the backend, becouse the user's SID
 187            may already be in security descriptors etc.
 188
 189            -- abartlet 11-May-02
 190         */
 191
 192
 193         /* Ensure this *must* be set right */
 194         if (strcmp(pwd->pw_name, guest_account) == 0) {
 195                 if (!pdb_set_user_sid_from_rid(sam_account, DOMAIN_USER_RID_GUEST)) {
 196                         return NT_STATUS_UNSUCCESSFUL;
 197                 }
 198                 if (!pdb_set_group_sid_from_rid(sam_account, DOMAIN_GROUP_RID_GUESTS)) {
 199                         return NT_STATUS_UNSUCCESSFUL;
 200                 }
 201         } else {
 202
 203                 if (!pdb_set_user_sid_from_rid(sam_account,
 204                                                fallback_pdb_uid_to_user_rid(pwd->pw_uid))) {
 205                         DEBUG(0,("Can't set User SID from RID!\n"));
 206                         return NT_STATUS_INVALID_PARAMETER;
 207                 }
 208
 209                 /* call the mapping code here */
 210                 if(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 211                         if (!pdb_set_group_sid(sam_account,&map.sid)){
 212                                 DEBUG(0,("Can't set Group SID!\n"));
 213                                 return NT_STATUS_INVALID_PARAMETER;
 214                         }
 215                 }
 216                 else {
 217                         if (!pdb_set_group_sid_from_rid(sam_account,pdb_gid_to_group_rid(pwd->pw_gid))) {
 218                                 DEBUG(0,("Can't set Group SID\n"));
 219                                 return NT_STATUS_INVALID_PARAMETER;
 220                         }
 221                 }
 222         }
 223
 224         /* check if this is a user account or a machine account */
 225         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 226         {
 227                 pdb_set_profile_path(sam_account,
 228                                      talloc_sub_specified((sam_account)->mem_ctx,
 229                                                             lp_logon_path(),
 230                                                             pwd->pw_name, global_myname,
 231                                                             pwd->pw_uid, pwd->pw_gid),
 232                                      False);
 233
 234                 pdb_set_homedir(sam_account,
 235                                 talloc_sub_specified((sam_account)->mem_ctx,
 236                                                        lp_logon_home(),
 237                                                        pwd->pw_name, global_myname,
 238                                                        pwd->pw_uid, pwd->pw_gid),
 239                                 False);
 240
 241                 pdb_set_dir_drive(sam_account,
 242                                   talloc_sub_specified((sam_account)->mem_ctx,
 243                                                          lp_logon_drive(),
 244                                                          pwd->pw_name, global_myname,
 245                                                          pwd->pw_uid, pwd->pw_gid),
 246                                   False);
 247
 248                 pdb_set_logon_script(sam_account,
 249                                      talloc_sub_specified((sam_account)->mem_ctx,
 250                                                             lp_logon_script(),
 251                                                             pwd->pw_name, global_myname,
 252                                                             pwd->pw_uid, pwd->pw_gid),
 253                                      False);
 254         }
 255         return NT_STATUS_OK;
 256 }
 257
 258
 259 /*************************************************************
 260  Initialises a struct sam_passwd with sane values.
 261  ************************************************************/
 262
 263 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 264 {
 265         NTSTATUS nt_status;
 266
 267         if (!pwd) {
 268                 new_sam_acct = NULL;
 269                 return NT_STATUS_UNSUCCESSFUL;
 270         }
 271
 272         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 273                 new_sam_acct = NULL;
 274                 return nt_status;
 275         }
 276
 277         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 278                 pdb_free_sam(new_sam_acct);
 279                 new_sam_acct = NULL;
 280                 return nt_status;
 281         }
 282
 283         return NT_STATUS_OK;
 284 }
 285
 286
 287 /**
 288  * Free the contets of the SAM_ACCOUNT, but not the structure.
 289  *
 290  * Also wipes the LM and NT hashes and plaintext passwrod from
 291  * memory.
 292  *
 293  * @param user SAM_ACCOUNT to free members of.
 294  **/
 295
 296 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 297 {
 298
 299         /* Kill off sensitive data.  Free()ed by the
 300            talloc mechinism */
 301
 302         data_blob_clear_free(&(user->private.lm_pw));
 303         data_blob_clear_free(&(user->private.nt_pw));
 304         data_blob_clear_free(&(user->private.plaintext_pw));
 305 }
 306
 307
 308 /************************************************************
 309  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 310  ***********************************************************/
 311
 312 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 313 {
 314         if (user == NULL) {
 315                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 316 #if 0
 317                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 318 #endif
 319                 return NT_STATUS_UNSUCCESSFUL;
 320         }
 321
 322         pdb_free_sam_contents(user);
 323
 324         pdb_fill_default_sam(user);
 325
 326         return NT_STATUS_OK;
 327 }
 328
 329
 330 /************************************************************
 331  Free the SAM_ACCOUNT and the member pointers.
 332  ***********************************************************/
 333
 334 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 335 {
 336         if (*user == NULL) {
 337                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 338 #if 0
 339                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 340 #endif
 341                 return NT_STATUS_UNSUCCESSFUL;
 342         }
 343
 344         pdb_free_sam_contents(*user);
 345
 346         if ((*user)->free_fn) {
 347                 (*user)->free_fn(user);
 348         }
 349
 350         return NT_STATUS_OK;
 351 }
 352
 353
 354 /**********************************************************
 355  Encode the account control bits into a string.
 356  length = length of string to encode into (including terminating
 357  null). length *MUST BE MORE THAN 2* !
 358  **********************************************************/
 359
 360 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 361 {
 362         static fstring acct_str;
 363         size_t i = 0;
 364
 365         acct_str[i++] = '[';
 366
 367         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 368         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 369         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 370         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 371         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 372         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 373         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 374         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 375         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 376         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 377         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 378
 379         for ( ; i < length - 2 ; i++ )
 380                 acct_str[i] = ' ';
 381
 382         i = length - 2;
 383         acct_str[i++] = ']';
 384         acct_str[i++] = '\0';
 385
 386         return acct_str;
 387 }
 388
 389 /**********************************************************
 390  Decode the account control bits from a string.
 391  **********************************************************/
 392
 393 uint16 pdb_decode_acct_ctrl(const char *p)
 394 {
 395         uint16 acct_ctrl = 0;
 396         BOOL finished = False;
 397
 398         /*
 399          * Check if the account type bits have been encoded after the
 400          * NT password (in the form [NDHTUWSLXI]).
 401          */
 402
 403         if (*p != '[')
 404                 return 0;
 405
 406         for (p++; *p && !finished; p++) {
 407                 switch (*p) {
 408                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 409                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 410                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 411                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 412                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 413                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 414                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 415                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 416                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 417                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 418                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 419             case ' ': { break; }
 420                         case ':':
 421                         case '\n':
 422                         case '\0':
 423                         case ']':
 424                         default:  { finished = True; }
 425                 }
 426         }
 427
 428         return acct_ctrl;
 429 }
 430
 431 /*************************************************************
 432  Routine to set 32 hex password characters from a 16 byte array.
 433 **************************************************************/
 434
 435 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 436 {
 437         if (pwd != NULL) {
 438                 int i;
 439                 for (i = 0; i < 16; i++)
 440                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 441         } else {
 442                 if (acct_ctrl & ACB_PWNOTREQ)
 443                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 444                 else
 445                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 446         }
 447 }
 448
 449 /*************************************************************
 450  Routine to get the 32 hex characters and turn them
 451  into a 16 byte array.
 452 **************************************************************/
 453
 454 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 455 {
 456         int i;
 457         unsigned char   lonybble, hinybble;
 458         char           *hexchars = "0123456789ABCDEF";
 459         char           *p1, *p2;
 460
 461         if (!p)
 462                 return (False);
 463
 464         for (i = 0; i < 32; i += 2) {
 465                 hinybble = toupper(p[i]);
 466                 lonybble = toupper(p[i + 1]);
 467
 468                 p1 = strchr(hexchars, hinybble);
 469                 p2 = strchr(hexchars, lonybble);
 470
 471                 if (!p1 || !p2)
 472                         return (False);
 473
 474                 hinybble = PTR_DIFF(p1, hexchars);
 475                 lonybble = PTR_DIFF(p2, hexchars);
 476
 477                 pwd[i / 2] = (hinybble << 4) | lonybble;
 478         }
 479         return (True);
 480 }
 481
 482 /*******************************************************************
 483  Converts NT user RID to a UNIX uid.
 484  ********************************************************************/
 485
 486 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 487 {
 488         int rid_offset = lp_algorithmic_rid_base();
 489         return (uid_t)(((user_rid & (~USER_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 490 }
 491
 492
 493 /*******************************************************************
 494  converts UNIX uid to an NT User RID.
 495  ********************************************************************/
 496
 497 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 498 {
 499         int rid_offset = lp_algorithmic_rid_base();
 500         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 501 }
 502
 503 /*******************************************************************
 504  Converts NT group RID to a UNIX gid.
 505  ********************************************************************/
 506
 507 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 508 {
 509         int rid_offset = lp_algorithmic_rid_base();
 510         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 511 }
 512
 513 /*******************************************************************
 514  converts NT Group RID to a UNIX uid.
 515
 516  warning: you must not call that function only
 517  you must do a call to the group mapping first.
 518  there is not anymore a direct link between the gid and the rid.
 519  ********************************************************************/
 520
 521 uint32 pdb_gid_to_group_rid(gid_t gid)
 522 {
 523         int rid_offset = lp_algorithmic_rid_base();
 524         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 525 }
 526
 527 /*******************************************************************
 528  Decides if a RID is a well known RID.
 529  ********************************************************************/
 530
 531 static BOOL pdb_rid_is_well_known(uint32 rid)
 532 {
 533         /* Not using rid_offset here, becouse this is the actual
 534            NT fixed value (1000) */
 535
 536         return (rid < BASE_RID);
 537 }
 538
 539 /*******************************************************************
 540  Decides if a RID is a user or group RID.
 541  ********************************************************************/
 542
 543 BOOL pdb_rid_is_user(uint32 rid)
 544 {
 545   /* lkcl i understand that NT attaches an enumeration to a RID
 546    * such that it can be identified as either a user, group etc
 547    * type.  there are 5 such categories, and they are documented.
 548    */
 549         /* However, they are not in the RID, just somthing you can query
 550            seperatly.  Sorry luke :-) */
 551
 552    if(pdb_rid_is_well_known(rid)) {
 553       /*
 554        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 555        * and DOMAIN_USER_RID_GUEST.
 556        */
 557      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 558        return True;
 559    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 560      return True;
 561    }
 562    return False;
 563 }
 564
 565 /*******************************************************************
 566  Convert a rid into a name. Used in the lookup SID rpc.
 567  ********************************************************************/
 568
 569 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 570 {
 571         uint32 rid;
 572         SAM_ACCOUNT *sam_account = NULL;
 573         GROUP_MAP map;
 574
 575         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 576                 DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 577                         sid_string_static(&map.sid)));
 578                 return False;
 579         }
 580         *psid_name_use = SID_NAME_UNKNOWN;
 581
 582         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 583
 584         if (rid == DOMAIN_USER_RID_ADMIN) {
 585                 char **admin_list = lp_admin_users(-1);
 586                 *psid_name_use = SID_NAME_USER;
 587                 if (admin_list) {
 588                         char *p = *admin_list;
 589                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 590                                 fstrcpy(name, "Administrator");
 591                 } else {
 592                         fstrcpy(name, "Administrator");
 593                 }
 594                 return True;
 595         }
 596
 597         /*
 598          * Don't try to convert the rid to a name if
 599          * running in appliance mode
 600          */
 601
 602         if (lp_hide_local_users())
 603                 return False;
 604
 605         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 606                 return False;
 607         }
 608
 609         /* This now does the 'generic' mapping in pdb_unix */
 610         /* 'guest' is also handled there */
 611         if (pdb_getsampwsid(sam_account, sid)) {
 612                 fstrcpy(name, pdb_get_username(sam_account));
 613                 *psid_name_use = SID_NAME_USER;
 614
 615                 pdb_free_sam(&sam_account);
 616
 617                 return True;
 618         }
 619
 620         pdb_free_sam(&sam_account);
 621
 622         if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 623                 if (map.gid!=-1) {
 624                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 625                 } else {
 626                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 627                 }
 628
 629                 fstrcpy(name, map.nt_name);
 630                 *psid_name_use = map.sid_name_use;
 631                 return True;
 632         }
 633
 634         if (pdb_rid_is_user(rid)) {
 635                 uid_t uid;
 636
 637                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 638
 639                 uid = fallback_pdb_user_rid_to_uid(rid);
 640                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 641
 642                 return False;  /* Indicates that this user was 'not mapped' */
 643         } else {
 644                 gid_t gid;
 645                 struct group *gr;
 646
 647                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 648
 649                 gid = pdb_group_rid_to_gid(rid);
 650                 gr = getgrgid(gid);
 651
 652                 *psid_name_use = SID_NAME_ALIAS;
 653
 654                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 655                          gr ? "succeeded" : "failed" ));
 656
 657                 if(!gr) {
 658                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 659                         return False; /* Indicates that this group was 'not mapped' */
 660                 }
 661
 662                 fstrcpy( name, gr->gr_name);
 663
 664                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 665                          (unsigned int)rid ));
 666                 return True;
 667         }
 668 }
 669
 670 /*******************************************************************
 671  Convert a name into a SID. Used in the lookup name rpc.
 672  ********************************************************************/
 673
 674 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 675 {
 676         extern DOM_SID global_sid_World_Domain;
 677         DOM_SID local_sid;
 678         fstring user;
 679         SAM_ACCOUNT *sam_account = NULL;
 680         struct group *grp;
 681         GROUP_MAP map;
 682
 683         *psid_name_use = SID_NAME_UNKNOWN;
 684
 685         /*
 686          * user may be quoted a const string, and map_username and
 687          * friends can modify it. Make a modifiable copy. JRA.
 688          */
 689
 690         fstrcpy(user, c_user);
 691
 692         sid_copy(&local_sid, get_global_sam_sid());
 693
 694         /*
 695          * Special case for MACHINE\Everyone. Map to the world_sid.
 696          */
 697
 698         if(strequal(user, "Everyone")) {
 699                 sid_copy( psid, &global_sid_World_Domain);
 700                 sid_append_rid(psid, 0);
 701                 *psid_name_use = SID_NAME_ALIAS;
 702                 return True;
 703         }
 704
 705         /*
 706          * Don't lookup local unix users if running in appliance mode
 707          */
 708         if (lp_hide_local_users())
 709                 return False;
 710
 711         (void)map_username(user);
 712
 713         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 714                 return False;
 715         }
 716
 717         if (pdb_getsampwnam(sam_account, user)) {
 718                 sid_copy(psid, pdb_get_user_sid(sam_account));
 719                 *psid_name_use = SID_NAME_USER;
 720
 721                 pdb_free_sam(&sam_account);
 722                 return True;
 723         }
 724
 725         pdb_free_sam(&sam_account);
 726
 727         /*
 728          * Maybe it was a group ?
 729          */
 730
 731         /* check if it's a mapped group */
 732         if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 733                 /* yes it's a mapped group */
 734                 sid_copy(&local_sid, &map.sid);
 735                 *psid_name_use = map.sid_name_use;
 736         } else {
 737                 /* it's not a mapped group */
 738                 grp = getgrnam(user);
 739                 if(!grp)
 740                         return False;
 741
 742                 /*
 743                  *check if it's mapped, if it is reply it doesn't exist
 744                  *
 745                  * that's to prevent this case:
 746                  *
 747                  * unix group ug is mapped to nt group ng
 748                  * someone does a lookup on ug
 749                  * we must not reply as it doesn't "exist" anymore
 750                  * for NT. For NT only ng exists.
 751                  * JFM, 30/11/2001
 752                  */
 753
 754                 if (get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 755                         return False;
 756                 }
 757
 758                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 759                 *psid_name_use = SID_NAME_ALIAS;
 760         }
 761
 762         sid_copy( psid, &local_sid);
 763
 764         return True;
 765 }
 766
 767 /****************************************************************************
 768  Convert a uid to SID - locally.
 769 ****************************************************************************/
 770
 771 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 772 {
 773         struct passwd *pass;
 774         SAM_ACCOUNT *sam_user = NULL;
 775         fstring str; /* sid string buffer */
 776
 777         sid_copy(psid, get_global_sam_sid());
 778
 779         if((pass = getpwuid_alloc(uid))) {
 780
 781                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) {
 782                         passwd_free(&pass);
 783                         return NULL;
 784                 }
 785
 786                 if (pdb_getsampwnam(sam_user, pass->pw_name)) {
 787                         sid_copy(psid, pdb_get_user_sid(sam_user));
 788                 } else if (strcmp(pass->pw_name, lp_guestaccount()) == 0) {
 789                         sid_append_rid(psid, DOMAIN_USER_RID_GUEST);
 790                 } else {
 791                         sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 792                 }
 793
 794                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n",
 795                           (unsigned)uid, sid_to_string( str, psid),
 796                           pass->pw_name ));
 797
 798                 passwd_free(&pass);
 799                 pdb_free_sam(&sam_user);
 800
 801         } else {
 802                 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 803
 804                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n",
 805                           (unsigned)uid, sid_to_string( str, psid)));
 806         }
 807
 808         return psid;
 809 }
 810
 811 /****************************************************************************
 812  Convert a SID to uid - locally.
 813 ****************************************************************************/
 814
 815 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 816 {
 817         fstring str;
 818         SAM_ACCOUNT *sam_user = NULL;
 819
 820         *name_type = SID_NAME_UNKNOWN;
 821
 822         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 823                 return False;
 824
 825         if (pdb_getsampwsid(sam_user, psid)) {
 826                 *puid = pdb_get_uid(sam_user);
 827                 if (*puid == -1) {
 828                         pdb_free_sam(&sam_user);
 829                         return False;
 830                 }
 831                 DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 832                           (unsigned int)*puid, pdb_get_username(sam_user)));
 833                 pdb_free_sam(&sam_user);
 834         } else {
 835
 836                 DOM_SID dom_sid;
 837                 uint32 rid;
 838                 GROUP_MAP map;
 839
 840                 pdb_free_sam(&sam_user);
 841
 842                 if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 843                         DEBUG(3, ("local_sid_to_uid: SID '%s' is a group, not a user... \n", sid_to_string(str, psid)));
 844                         /* It's a group, not a user... */
 845                         return False;
 846                 }
 847
 848                 sid_copy(&dom_sid, psid);
 849                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 850                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 851                         return False;
 852                 }
 853
 854                 if (!pdb_rid_is_user(rid)) {
 855                         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)));
 856                         return False;
 857                 }
 858
 859                 *puid = fallback_pdb_user_rid_to_uid(rid);
 860
 861                 DEBUG(5,("local_sid_to_uid: SID %s algorithmicly mapped to %ld mapped becouse SID was not found in passdb.\n",
 862                          sid_to_string(str, psid), (signed long int)(*puid)));
 863         }
 864
 865         *name_type = SID_NAME_USER;
 866
 867         return True;
 868 }
 869
 870 /****************************************************************************
 871  Convert a gid to SID - locally.
 872 ****************************************************************************/
 873
 874 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 875 {
 876         GROUP_MAP map;
 877
 878         sid_copy(psid, get_global_sam_sid());
 879
 880         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 881                 sid_copy(psid, &map.sid);
 882         }
 883         else {
 884                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 885         }
 886
 887         return psid;
 888 }
 889
 890 /****************************************************************************
 891  Convert a SID to gid - locally.
 892 ****************************************************************************/
 893
 894 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 895 {
 896         fstring str;
 897         GROUP_MAP map;
 898
 899         *name_type = SID_NAME_UNKNOWN;
 900
 901         /*
 902          * We can only convert to a gid if this is our local
 903          * Domain SID (ie. we are the controling authority).
 904          *
 905          * Or in the Builtin SID too. JFM, 11/30/2001
 906          */
 907
 908         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 909
 910                 /* the SID is in the mapping table but not mapped */
 911                 if (map.gid==-1)
 912                         return False;
 913
 914                 *pgid = map.gid;
 915                 *name_type = map.sid_name_use;
 916                 DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n",
 917                           sid_to_string( str, psid),
 918                           map.nt_name, (unsigned int)*pgid));
 919
 920         } else {
 921                 uint32 rid;
 922                 SAM_ACCOUNT *sam_user = NULL;
 923                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 924                         return False;
 925
 926                 if (pdb_getsampwsid(sam_user, psid)) {
 927                         return False;
 928                         pdb_free_sam(&sam_user);
 929                 }
 930
 931                 pdb_free_sam(&sam_user);
 932
 933                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 934                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 935                         return False;
 936                 }
 937
 938                 if (pdb_rid_is_user(rid))
 939                         return False;
 940
 941                 *pgid = pdb_group_rid_to_gid(rid);
 942                 *name_type = SID_NAME_ALIAS;
 943                 DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid),
 944                           (unsigned int)*pgid));
 945         }
 946
 947         return True;
 948 }
 949
 950 /**
 951  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 952  * @return static buffer containing the converted string
 953  **/
 954
 955 const char *pdb_unistr2_convert(const UNISTR2 *from)
 956 {
 957         static pstring convert_buffer;
 958         *convert_buffer = 0;
 959         if (!from) {
 960                 return convert_buffer;
 961         }
 962
 963         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 964         return convert_buffer;
 965 }
 966
 967 /*************************************************************
 968  Change a password entry in the local smbpasswd file.
 969
 970  FIXME!!  The function needs to be abstracted into the
 971  passdb interface or something.  It is currently being called
 972  by _api_samr_create_user() in rpc_server/srv_samr.c,
 973  in SWAT and by smbpasswd/pdbedit.
 974
 975  --jerry
 976  *************************************************************/
 977
 978 BOOL local_password_change(const char *user_name, int local_flags,
 979                            const char *new_passwd,
 980                            char *err_str, size_t err_str_len,
 981                            char *msg_str, size_t msg_str_len)
 982 {
 983         struct passwd  *pwd = NULL;
 984         SAM_ACCOUNT     *sam_pass=NULL;
 985
 986         *err_str = '\0';
 987         *msg_str = '\0';
 988
 989         /* Get the smb passwd entry for this user */
 990         pdb_init_sam(&sam_pass);
 991         if(!pdb_getsampwnam(sam_pass, user_name)) {
 992                 pdb_free_sam(&sam_pass);
 993
 994                 if (local_flags & LOCAL_ADD_USER) {
 995                         pwd = getpwnam_alloc(user_name);
 996                 } else if (local_flags & LOCAL_DELETE_USER) {
 997                         /* Might not exist in /etc/passwd */
 998                 } else {
 999                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1000                         return False;
1001                 }
1002
1003                 if (pwd) {
1004                         /* Local user found, so init from this */
1005                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1006                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1007                                 passwd_free(&pwd);
1008                                 return False;
1009                         }
1010
1011                         passwd_free(&pwd);
1012                 } else {
1013                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1014                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1015                                 return False;
1016                         }
1017
1018                         if (!pdb_set_username(sam_pass, user_name)) {
1019                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1020                                 pdb_free_sam(&sam_pass);
1021                                 return False;
1022                         }
1023                 }
1024                 if (local_flags & LOCAL_TRUST_ACCOUNT) {
1025                         if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST)) {
1026                                 slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1027                                 pdb_free_sam(&sam_pass);
1028                                 return False;
1029                         }
1030                 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1031                         if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST)) {
1032                                 slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1033                                 pdb_free_sam(&sam_pass);
1034                                 return False;
1035                         }
1036                 } else {
1037                         if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL)) {
1038                                 slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1039                                 pdb_free_sam(&sam_pass);
1040                                 return False;
1041                         }
1042                 }
1043
1044         } else {
1045                 /* the entry already existed */
1046                 local_flags &= ~LOCAL_ADD_USER;
1047         }
1048
1049         /*
1050          * We are root - just write the new password
1051          * and the valid last change time.
1052          */
1053
1054         if (local_flags & LOCAL_DISABLE_USER) {
1055                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED)) {
1056                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1057                         pdb_free_sam(&sam_pass);
1058                         return False;
1059                 }
1060         } else if (local_flags & LOCAL_ENABLE_USER) {
1061                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1062                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1063                         pdb_free_sam(&sam_pass);
1064                         return False;
1065                 }
1066         }
1067
1068         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1069                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ)) {
1070                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1071                         pdb_free_sam(&sam_pass);
1072                         return False;
1073                 }
1074         } else if (local_flags & LOCAL_SET_PASSWORD) {
1075                 /*
1076                  * If we're dealing with setting a completely empty user account
1077                  * ie. One with a password of 'XXXX', but not set disabled (like
1078                  * an account created from scratch) then if the old password was
1079                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1080                  * We remove that as we're giving this user their first password
1081                  * and the decision hasn't really been made to disable them (ie.
1082                  * don't create them disabled). JRA.
1083                  */
1084                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
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                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ))) {
1092                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1093                         pdb_free_sam(&sam_pass);
1094                         return False;
1095                 }
1096
1097                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1098                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1099                         pdb_free_sam(&sam_pass);
1100                         return False;
1101                 }
1102         }
1103
1104         if (local_flags & LOCAL_ADD_USER) {
1105                 if (pdb_add_sam_account(sam_pass)) {
1106                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1107                         pdb_free_sam(&sam_pass);
1108                         return True;
1109                 } else {
1110                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1111                         pdb_free_sam(&sam_pass);
1112                         return False;
1113                 }
1114         } else if (local_flags & LOCAL_DELETE_USER) {
1115                 if (!pdb_delete_sam_account(sam_pass)) {
1116                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1117                         pdb_free_sam(&sam_pass);
1118                         return False;
1119                 }
1120                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1121         } else {
1122                 if(!pdb_update_sam_account(sam_pass)) {
1123                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1124                         pdb_free_sam(&sam_pass);
1125                         return False;
1126                 }
1127                 if(local_flags & LOCAL_DISABLE_USER)
1128                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1129                 else if (local_flags & LOCAL_ENABLE_USER)
1130                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1131                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1132                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1133         }
1134
1135         pdb_free_sam(&sam_pass);
1136         return True;
1137 }