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 /*
  27  * This is set on startup - it defines the SID for this
  28  * machine, and therefore the SAM database for which it is
  29  * responsible.
  30  */
  31
  32 extern DOM_SID global_sam_sid;
  33
  34 /************************************************************
  35  Fill the SAM_ACCOUNT with default values.
  36  ***********************************************************/
  37
  38 static void pdb_fill_default_sam(SAM_ACCOUNT *user)
  39 {
  40         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  41
  42         /* Don't change these timestamp settings without a good reason.
  43            They are important for NT member server compatibility. */
  44
  45         user->private.init_flag             = FLAG_SAM_UNINIT;
  46         user->private.uid = user->private.gid       = -1;
  47
  48         user->private.logon_time            = (time_t)0;
  49         user->private.pass_last_set_time    = (time_t)0;
  50         user->private.pass_can_change_time  = (time_t)0;
  51         user->private.logoff_time           =
  52         user->private.kickoff_time          =
  53         user->private.pass_must_change_time = get_time_t_max();
  54         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  55         user->private.logon_divs = 168;         /* hours per week */
  56         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  57         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  58         user->private.unknown_5 = 0x00000000; /* don't know */
  59         user->private.unknown_6 = 0x000004ec; /* don't know */
  60
  61         /* Some parts of samba strlen their pdb_get...() returns,
  62            so this keeps the interface unchanged for now. */
  63
  64         user->private.username = "";
  65         user->private.domain = "";
  66         user->private.nt_username = "";
  67         user->private.full_name = "";
  68         user->private.home_dir = "";
  69         user->private.logon_script = "";
  70         user->private.profile_path = "";
  71         user->private.acct_desc = "";
  72         user->private.workstations = "";
  73         user->private.unknown_str = "";
  74         user->private.munged_dial = "";
  75 }
  76
  77 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
  78 {
  79         if (*user) {
  80                 talloc_destroy((*user)->mem_ctx);
  81                 *user = NULL;
  82         }
  83 }
  84
  85
  86 /**********************************************************************
  87  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
  88 ***********************************************************************/
  89
  90 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
  91 {
  92         if (*user != NULL) {
  93                 DEBUG(0,("pdb_init_sam: SAM_ACCOUNT was non NULL\n"));
  94 #if 0
  95                 smb_panic("NULL pointer passed to pdb_init_sam\n");
  96 #endif
  97                 return NT_STATUS_UNSUCCESSFUL;
  98         }
  99
 100         if (!mem_ctx) {
 101                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 102                 return NT_STATUS_UNSUCCESSFUL;
 103         }
 104
 105         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 106
 107         if (*user==NULL) {
 108                 DEBUG(0,("pdb_init_sam: error while allocating memory\n"));
 109                 return NT_STATUS_NO_MEMORY;
 110         }
 111
 112         (*user)->mem_ctx = mem_ctx;
 113
 114         (*user)->free_fn = NULL;
 115
 116         pdb_fill_default_sam(*user);
 117
 118         return NT_STATUS_OK;
 119 }
 120
 121
 122 /*************************************************************
 123  Alloc memory and initialises a struct sam_passwd.
 124  ************************************************************/
 125
 126 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 127 {
 128         TALLOC_CTX *mem_ctx;
 129         NTSTATUS nt_status;
 130
 131         mem_ctx = talloc_init_named("passdb internal SAM_ACCOUNT allocation");
 132
 133         if (!mem_ctx) {
 134                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 135                 return NT_STATUS_NO_MEMORY;
 136         }
 137
 138         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 139                 talloc_destroy(mem_ctx);
 140                 return nt_status;
 141         }
 142
 143         (*user)->free_fn = destroy_pdb_talloc;
 144
 145         return NT_STATUS_OK;
 146 }
 147
 148
 149 /*************************************************************
 150  Initialises a struct sam_passwd with sane values.
 151  ************************************************************/
 152
 153 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 154 {
 155         pstring str;
 156         GROUP_MAP map;
 157         uint32 rid;
 158         NTSTATUS nt_status;
 159
 160         if (!pwd) {
 161                 new_sam_acct = NULL;
 162                 return NT_STATUS_UNSUCCESSFUL;
 163         }
 164
 165         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 166                 new_sam_acct = NULL;
 167                 return nt_status;
 168         }
 169
 170         pdb_set_username(*new_sam_acct, pwd->pw_name);
 171         pdb_set_fullname(*new_sam_acct, pwd->pw_gecos);
 172
 173         pdb_set_uid(*new_sam_acct, pwd->pw_uid);
 174         pdb_set_gid(*new_sam_acct, pwd->pw_gid);
 175
 176         pdb_set_user_rid(*new_sam_acct, pdb_uid_to_user_rid(pwd->pw_uid));
 177
 178         /* call the mapping code here */
 179         if(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 180                 sid_peek_rid(&map.sid, &rid);
 181         }
 182         else {
 183                 rid=pdb_gid_to_group_rid(pwd->pw_gid);
 184         }
 185
 186         pdb_set_group_rid(*new_sam_acct, rid);
 187
 188         pstrcpy(str, lp_logon_path());
 189         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 190         pdb_set_profile_path(*new_sam_acct, str, False);
 191
 192         pstrcpy(str, lp_logon_home());
 193         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 194         pdb_set_homedir(*new_sam_acct, str, False);
 195
 196         pstrcpy(str, lp_logon_drive());
 197         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 198         pdb_set_dir_drive(*new_sam_acct, str, False);
 199
 200         pstrcpy(str, lp_logon_script());
 201         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 202         pdb_set_logon_script(*new_sam_acct, str, False);
 203
 204         return NT_STATUS_OK;
 205 }
 206
 207
 208 /**
 209  * Free the contets of the SAM_ACCOUNT, but not the structure.
 210  *
 211  * Also wipes the LM and NT hashes from memory.
 212  *
 213  * @param user SAM_ACCOUNT to free members of.
 214  **/
 215
 216 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 217 {
 218         /* As we start mallocing more strings this is where
 219            we should free them. */
 220
 221         data_blob_clear_free(&(user->private.lm_pw));
 222         data_blob_clear_free(&(user->private.nt_pw));
 223 }
 224
 225
 226 /************************************************************
 227  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 228  ***********************************************************/
 229
 230 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 231 {
 232         if (user == NULL) {
 233                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 234 #if 0
 235                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 236 #endif
 237                 return NT_STATUS_UNSUCCESSFUL;
 238         }
 239
 240         pdb_free_sam_contents(user);
 241
 242         pdb_fill_default_sam(user);
 243
 244         return NT_STATUS_OK;
 245 }
 246
 247
 248 /************************************************************
 249  Free the SAM_ACCOUNT and the member pointers.
 250  ***********************************************************/
 251
 252 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 253 {
 254         if (*user == NULL) {
 255                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 256 #if 0
 257                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 258 #endif
 259                 return NT_STATUS_UNSUCCESSFUL;
 260         }
 261
 262         pdb_free_sam_contents(*user);
 263
 264         if ((*user)->free_fn) {
 265                 (*user)->free_fn(user);
 266         }
 267
 268         return NT_STATUS_OK;
 269 }
 270
 271
 272 /**********************************************************
 273  Encode the account control bits into a string.
 274  length = length of string to encode into (including terminating
 275  null). length *MUST BE MORE THAN 2* !
 276  **********************************************************/
 277
 278 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 279 {
 280         static fstring acct_str;
 281         size_t i = 0;
 282
 283         acct_str[i++] = '[';
 284
 285         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 286         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 287         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 288         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 289         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 290         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 291         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 292         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 293         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 294         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 295         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 296
 297         for ( ; i < length - 2 ; i++ )
 298                 acct_str[i] = ' ';
 299
 300         i = length - 2;
 301         acct_str[i++] = ']';
 302         acct_str[i++] = '\0';
 303
 304         return acct_str;
 305 }
 306
 307 /**********************************************************
 308  Decode the account control bits from a string.
 309  **********************************************************/
 310
 311 uint16 pdb_decode_acct_ctrl(const char *p)
 312 {
 313         uint16 acct_ctrl = 0;
 314         BOOL finished = False;
 315
 316         /*
 317          * Check if the account type bits have been encoded after the
 318          * NT password (in the form [NDHTUWSLXI]).
 319          */
 320
 321         if (*p != '[')
 322                 return 0;
 323
 324         for (p++; *p && !finished; p++) {
 325                 switch (*p) {
 326                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 327                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 328                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 329                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 330                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 331                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 332                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 333                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 334                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 335                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 336                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 337             case ' ': { break; }
 338                         case ':':
 339                         case '\n':
 340                         case '\0':
 341                         case ']':
 342                         default:  { finished = True; }
 343                 }
 344         }
 345
 346         return acct_ctrl;
 347 }
 348
 349 /*************************************************************
 350  Routine to set 32 hex password characters from a 16 byte array.
 351 **************************************************************/
 352
 353 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 354 {
 355         if (pwd != NULL) {
 356                 int i;
 357                 for (i = 0; i < 16; i++)
 358                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 359         } else {
 360                 if (acct_ctrl & ACB_PWNOTREQ)
 361                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 362                 else
 363                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 364         }
 365 }
 366
 367 /*************************************************************
 368  Routine to get the 32 hex characters and turn them
 369  into a 16 byte array.
 370 **************************************************************/
 371
 372 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 373 {
 374         int i;
 375         unsigned char   lonybble, hinybble;
 376         char           *hexchars = "0123456789ABCDEF";
 377         char           *p1, *p2;
 378
 379         if (!p)
 380                 return (False);
 381
 382         for (i = 0; i < 32; i += 2) {
 383                 hinybble = toupper(p[i]);
 384                 lonybble = toupper(p[i + 1]);
 385
 386                 p1 = strchr(hexchars, hinybble);
 387                 p2 = strchr(hexchars, lonybble);
 388
 389                 if (!p1 || !p2)
 390                         return (False);
 391
 392                 hinybble = PTR_DIFF(p1, hexchars);
 393                 lonybble = PTR_DIFF(p2, hexchars);
 394
 395                 pwd[i / 2] = (hinybble << 4) | lonybble;
 396         }
 397         return (True);
 398 }
 399
 400 /*******************************************************************
 401  Group and User RID username mapping function
 402  ********************************************************************/
 403
 404 BOOL pdb_name_to_rid(const char *user_name, uint32 *u_rid, uint32 *g_rid)
 405 {
 406         GROUP_MAP map;
 407         struct passwd *pw = Get_Pwnam(user_name);
 408
 409         if (u_rid == NULL || g_rid == NULL || user_name == NULL)
 410                 return False;
 411
 412         if (!pw) {
 413                 DEBUG(1,("Username %s is invalid on this system\n", user_name));
 414                 return False;
 415         }
 416
 417         /* turn the unix UID into a Domain RID.  this is what the posix
 418            sub-system does (adds 1000 to the uid) */
 419         *u_rid = pdb_uid_to_user_rid(pw->pw_uid);
 420
 421         /* absolutely no idea what to do about the unix GID to Domain RID mapping */
 422         /* map it ! */
 423         if (get_group_map_from_gid(pw->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 424                 sid_peek_rid(&map.sid, g_rid);
 425         } else
 426                 *g_rid = pdb_gid_to_group_rid(pw->pw_gid);
 427
 428         return True;
 429 }
 430
 431 /*******************************************************************
 432  Converts NT user RID to a UNIX uid.
 433  ********************************************************************/
 434
 435 uid_t pdb_user_rid_to_uid(uint32 user_rid)
 436 {
 437         return (uid_t)(((user_rid & (~USER_RID_TYPE))- 1000)/RID_MULTIPLIER);
 438 }
 439
 440
 441 /*******************************************************************
 442  Converts NT group RID to a UNIX gid.
 443  ********************************************************************/
 444
 445 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 446 {
 447         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- 1000)/RID_MULTIPLIER);
 448 }
 449
 450 /*******************************************************************
 451  converts UNIX uid to an NT User RID.
 452  ********************************************************************/
 453
 454 uint32 pdb_uid_to_user_rid(uid_t uid)
 455 {
 456         return (((((uint32)uid)*RID_MULTIPLIER) + 1000) | USER_RID_TYPE);
 457 }
 458
 459 /*******************************************************************
 460  converts NT Group RID to a UNIX uid.
 461
 462  warning: you must not call that function only
 463  you must do a call to the group mapping first.
 464  there is not anymore a direct link between the gid and the rid.
 465  ********************************************************************/
 466
 467 uint32 pdb_gid_to_group_rid(gid_t gid)
 468 {
 469   return (((((uint32)gid)*RID_MULTIPLIER) + 1000) | GROUP_RID_TYPE);
 470 }
 471
 472 /*******************************************************************
 473  Decides if a RID is a well known RID.
 474  ********************************************************************/
 475
 476 static BOOL pdb_rid_is_well_known(uint32 rid)
 477 {
 478   return (rid < 1000);
 479 }
 480
 481 /*******************************************************************
 482  Decides if a RID is a user or group RID.
 483  ********************************************************************/
 484
 485 BOOL pdb_rid_is_user(uint32 rid)
 486 {
 487   /* lkcl i understand that NT attaches an enumeration to a RID
 488    * such that it can be identified as either a user, group etc
 489    * type.  there are 5 such categories, and they are documented.
 490    */
 491    if(pdb_rid_is_well_known(rid)) {
 492       /*
 493        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 494        * and DOMAIN_USER_RID_GUEST.
 495        */
 496      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 497        return True;
 498    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 499      return True;
 500    }
 501    return False;
 502 }
 503
 504 /*******************************************************************
 505  Convert a rid into a name. Used in the lookup SID rpc.
 506  ********************************************************************/
 507
 508 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 509 {
 510         uint32 rid;
 511         BOOL is_user;
 512         SAM_ACCOUNT *sam_account = NULL;
 513         BOOL found = False;
 514
 515         sid_peek_rid(sid, &rid);
 516         is_user = pdb_rid_is_user(rid);
 517         *psid_name_use = SID_NAME_UNKNOWN;
 518
 519         DEBUG(5,("local_lookup_sid: looking up %s RID %u.\n", is_user ? "user" :
 520                         "group", (unsigned int)rid));
 521
 522         if(is_user) {
 523                 if(rid == DOMAIN_USER_RID_ADMIN) {
 524                         pstring admin_users;
 525                         char *p = admin_users;
 526                         *psid_name_use = SID_NAME_USER;
 527                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 528                                 fstrcpy(name, "Administrator");
 529                 } else if (rid == DOMAIN_USER_RID_GUEST) {
 530                         pstring guest_users;
 531                         char *p = guest_users;
 532                         *psid_name_use = SID_NAME_USER;
 533                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 534                                 fstrcpy(name, "Guest");
 535                 } else {
 536                         uid_t uid;
 537                         struct passwd *pass;
 538
 539                         /*
 540                          * Don't try to convert the rid to a name if
 541                          * running in appliance mode
 542                          */
 543                         if (lp_hide_local_users())
 544                                 return False;
 545
 546                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 547                                 return False;
 548                         }
 549
 550                         if (pdb_getsampwrid(sam_account, rid)) {
 551                                 fstrcpy(name, pdb_get_username(sam_account));
 552                                 *psid_name_use = SID_NAME_USER;
 553                                 found = True;
 554                         }
 555
 556                         pdb_free_sam(&sam_account);
 557
 558                         if (found) {
 559                                 return True;
 560                         }
 561
 562                         uid = pdb_user_rid_to_uid(rid);
 563                         pass = getpwuid_alloc(uid);
 564
 565                         *psid_name_use = SID_NAME_USER;
 566
 567                         DEBUG(5,("local_lookup_sid: looking up uid %u %s\n", (unsigned int)uid,
 568                                  pass ? "succeeded" : "failed" ));
 569
 570                         if(!pass) {
 571                                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 572                                 return True;
 573                         }
 574
 575                         fstrcpy(name, pass->pw_name);
 576
 577                         DEBUG(5,("local_lookup_sid: found user %s for rid %u\n", name,
 578                                  (unsigned int)rid ));
 579
 580                         passwd_free(&pass);
 581                 }
 582
 583         } else {
 584                 gid_t gid;
 585                 struct group *gr;
 586                 GROUP_MAP map;
 587
 588                 /*
 589                  * Don't try to convert the rid to a name if running
 590                  * in appliance mode
 591                  */
 592
 593                 if (lp_hide_local_users())
 594                         return False;
 595
 596                 /* check if it's a mapped group */
 597                 if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 598                         if (map.gid!=-1) {
 599                                 DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 600                                 fstrcpy(name, map.nt_name);
 601                                 *psid_name_use = map.sid_name_use;
 602                                 return True;
 603                         }
 604                 }
 605
 606                 gid = pdb_group_rid_to_gid(rid);
 607                 gr = getgrgid(gid);
 608
 609                 *psid_name_use = SID_NAME_ALIAS;
 610
 611                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 612                         gr ? "succeeded" : "failed" ));
 613
 614                 if(!gr) {
 615                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 616                         return False;
 617                 }
 618
 619                 fstrcpy( name, gr->gr_name);
 620
 621                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 622                         (unsigned int)rid ));
 623         }
 624
 625         return True;
 626 }
 627
 628 /*******************************************************************
 629  Convert a name into a SID. Used in the lookup name rpc.
 630  ********************************************************************/
 631
 632 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 633 {
 634         extern DOM_SID global_sid_World_Domain;
 635         struct passwd *pass = NULL;
 636         DOM_SID local_sid;
 637         fstring user;
 638         SAM_ACCOUNT *sam_account = NULL;
 639         BOOL found = False;
 640
 641         *psid_name_use = SID_NAME_UNKNOWN;
 642
 643         /*
 644          * user may be quoted a const string, and map_username and
 645          * friends can modify it. Make a modifiable copy. JRA.
 646          */
 647
 648         fstrcpy(user, c_user);
 649
 650         sid_copy(&local_sid, &global_sam_sid);
 651
 652         /*
 653          * Special case for MACHINE\Everyone. Map to the world_sid.
 654          */
 655
 656         if(strequal(user, "Everyone")) {
 657                 sid_copy( psid, &global_sid_World_Domain);
 658                 sid_append_rid(psid, 0);
 659                 *psid_name_use = SID_NAME_ALIAS;
 660                 return True;
 661         }
 662
 663         /*
 664          * Don't lookup local unix users if running in appliance mode
 665          */
 666         if (lp_hide_local_users())
 667                 return False;
 668
 669         (void)map_username(user);
 670
 671         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 672                 return False;
 673         }
 674
 675         if (pdb_getsampwnam(sam_account, user)) {
 676                 sid_append_rid( &local_sid, pdb_get_user_rid(sam_account));
 677                 *psid_name_use = SID_NAME_USER;
 678
 679                 sid_copy( psid, &local_sid);
 680                 found = True;
 681         }
 682
 683         pdb_free_sam(&sam_account);
 684
 685         if (!found && (pass = Get_Pwnam(user))) {
 686                 sid_append_rid( &local_sid, pdb_uid_to_user_rid(pass->pw_uid));
 687                 *psid_name_use = SID_NAME_USER;
 688                 pdb_free_sam(&sam_account);
 689
 690         } else if (!found) {
 691                 /*
 692                  * Maybe it was a group ?
 693                  */
 694                 struct group *grp;
 695                 GROUP_MAP map;
 696
 697                 pdb_free_sam(&sam_account);
 698
 699                 /* check if it's a mapped group */
 700                 if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 701                         if (map.gid!=-1) {
 702                                 /* yes it's a mapped group to a valid unix group */
 703                                 sid_copy(&local_sid, &map.sid);
 704                                 *psid_name_use = map.sid_name_use;
 705                         }
 706                         else
 707                                 /* it's a correct name but not mapped so it points to nothing*/
 708                                 return False;
 709                 } else {
 710                         /* it's not a mapped group */
 711                         grp = getgrnam(user);
 712                         if(!grp)
 713                                 return False;
 714
 715                         /*
 716                          *check if it's mapped, if it is reply it doesn't exist
 717                          *
 718                          * that's to prevent this case:
 719                          *
 720                          * unix group ug is mapped to nt group ng
 721                          * someone does a lookup on ug
 722                          * we must not reply as it doesn't "exist" anymore
 723                          * for NT. For NT only ng exists.
 724                          * JFM, 30/11/2001
 725                          */
 726
 727                         if(get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 728                                 return False;
 729                         }
 730
 731                         sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 732                         *psid_name_use = SID_NAME_ALIAS;
 733                 }
 734         }
 735
 736         sid_copy( psid, &local_sid);
 737
 738         return True;
 739 }
 740
 741 /****************************************************************************
 742  Convert a uid to SID - locally.
 743 ****************************************************************************/
 744
 745 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 746 {
 747         extern DOM_SID global_sam_sid;
 748
 749         sid_copy(psid, &global_sam_sid);
 750         sid_append_rid(psid, pdb_uid_to_user_rid(uid));
 751
 752         return psid;
 753 }
 754
 755 /****************************************************************************
 756  Convert a SID to uid - locally.
 757 ****************************************************************************/
 758
 759 BOOL local_sid_to_uid(uid_t *puid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 760 {
 761         extern DOM_SID global_sam_sid;
 762
 763         DOM_SID dom_sid;
 764         uint32 rid;
 765         fstring str;
 766         struct passwd *pass;
 767
 768         *name_type = SID_NAME_UNKNOWN;
 769
 770         sid_copy(&dom_sid, psid);
 771         sid_split_rid(&dom_sid, &rid);
 772
 773         if (!pdb_rid_is_user(rid))
 774                 return False;
 775
 776         /*
 777          * We can only convert to a uid if this is our local
 778          * Domain SID (ie. we are the controling authority).
 779          */
 780         if (!sid_equal(&global_sam_sid, &dom_sid))
 781                 return False;
 782
 783         *puid = pdb_user_rid_to_uid(rid);
 784
 785         /*
 786          * Ensure this uid really does exist.
 787          */
 788         if(!(pass = getpwuid_alloc(*puid)))
 789                 return False;
 790
 791         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 792                 (unsigned int)*puid, pass->pw_name ));
 793
 794         passwd_free(&pass);
 795
 796         *name_type = SID_NAME_USER;
 797
 798         return True;
 799 }
 800
 801 /****************************************************************************
 802  Convert a gid to SID - locally.
 803 ****************************************************************************/
 804
 805 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 806 {
 807         extern DOM_SID global_sam_sid;
 808         GROUP_MAP map;
 809
 810         sid_copy(psid, &global_sam_sid);
 811
 812         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 813                 sid_copy(psid, &map.sid);
 814         }
 815         else {
 816                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 817         }
 818
 819         return psid;
 820 }
 821
 822 /****************************************************************************
 823  Convert a SID to gid - locally.
 824 ****************************************************************************/
 825
 826 BOOL local_sid_to_gid(gid_t *pgid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 827 {
 828         extern DOM_SID global_sam_sid;
 829         DOM_SID dom_sid;
 830         uint32 rid;
 831         fstring str;
 832         struct group *grp;
 833         GROUP_MAP map;
 834
 835         *name_type = SID_NAME_UNKNOWN;
 836
 837         sid_copy(&dom_sid, psid);
 838         sid_split_rid(&dom_sid, &rid);
 839
 840         /*
 841          * We can only convert to a gid if this is our local
 842          * Domain SID (ie. we are the controling authority).
 843          *
 844          * Or in the Builtin SID too. JFM, 11/30/2001
 845          */
 846
 847         if (!sid_equal(&global_sam_sid, &dom_sid))
 848                 return False;
 849
 850         if (pdb_rid_is_user(rid))
 851                 return False;
 852
 853         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 854
 855                 /* the SID is in the mapping table but not mapped */
 856                 if (map.gid==-1)
 857                         return False;
 858
 859                 sid_peek_rid(&map.sid, &rid);
 860                 *pgid = rid;
 861                 *name_type = map.sid_name_use;
 862         } else {
 863                 *pgid = pdb_group_rid_to_gid(rid);
 864                 *name_type = SID_NAME_ALIAS;
 865         }
 866
 867         /*
 868          * Ensure this gid really does exist.
 869          */
 870
 871         if(!(grp = getgrgid(*pgid)))
 872                 return False;
 873
 874         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u) (%s).\n", sid_to_string( str, psid),
 875                 (unsigned int)*pgid, grp->gr_name ));
 876
 877         return True;
 878 }
 879
 880 /**
 881  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 882  * @return static buffer containing the converted string
 883  **/
 884
 885 static char *pdb_convert(const UNISTR2 *from)
 886 {
 887         static pstring convert_buffer;
 888         *convert_buffer = 0;
 889         if (!from) {
 890                 return convert_buffer;
 891         }
 892
 893         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 894         return convert_buffer;
 895 }
 896
 897 /*************************************************************
 898  Copies a SAM_USER_INFO_23 to a SAM_ACCOUNT
 899  **************************************************************/
 900
 901 void copy_id23_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_23 *from)
 902 {
 903
 904         if (from == NULL || to == NULL)
 905                 return;
 906
 907         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time));
 908         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time));
 909         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time));
 910         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
 911         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time));
 912         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time));
 913
 914         if (from->uni_user_name.buffer)
 915                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
 916         if (from->uni_full_name.buffer)
 917                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
 918         if (from->uni_home_dir.buffer)
 919                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
 920         if (from->uni_dir_drive.buffer)
 921                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
 922         if (from->uni_logon_script.buffer)
 923                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
 924         if (from->uni_profile_path.buffer)
 925                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
 926         if (from->uni_acct_desc.buffer)
 927                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
 928         if (from->uni_workstations.buffer)
 929                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
 930         if (from->uni_unknown_str.buffer)
 931                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
 932         if (from->uni_munged_dial.buffer)
 933                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
 934
 935         if (from->user_rid)
 936                 pdb_set_user_rid(to, from->user_rid);
 937         if (from->group_rid)
 938                 pdb_set_group_rid(to, from->group_rid);
 939
 940         pdb_set_acct_ctrl(to, from->acb_info);
 941         pdb_set_unknown_3(to, from->unknown_3);
 942
 943         pdb_set_logon_divs(to, from->logon_divs);
 944         pdb_set_hours_len(to, from->logon_hrs.len);
 945         pdb_set_hours(to, from->logon_hrs.hours);
 946
 947         pdb_set_unknown_5(to, from->unknown_5);
 948         pdb_set_unknown_6(to, from->unknown_6);
 949 }
 950
 951
 952 /*************************************************************
 953  Copies a sam passwd.
 954  **************************************************************/
 955
 956 void copy_id21_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_21 *from)
 957 {
 958         if (from == NULL || to == NULL)
 959                 return;
 960
 961         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time));
 962         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time));
 963         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time));
 964         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
 965         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time));
 966         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time));
 967
 968         if (from->uni_user_name.buffer)
 969                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
 970         if (from->uni_full_name.buffer)
 971                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
 972         if (from->uni_home_dir.buffer)
 973                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
 974         if (from->uni_dir_drive.buffer)
 975                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
 976         if (from->uni_logon_script.buffer)
 977                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
 978         if (from->uni_profile_path.buffer)
 979                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
 980         if (from->uni_acct_desc.buffer)
 981                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
 982         if (from->uni_workstations.buffer)
 983                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
 984         if (from->uni_unknown_str.buffer)
 985                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
 986         if (from->uni_munged_dial.buffer)
 987                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
 988
 989         if (from->user_rid)
 990                 pdb_set_user_rid(to, from->user_rid);
 991         if (from->group_rid)
 992                 pdb_set_group_rid(to, from->group_rid);
 993
 994         /* FIXME!!  Do we need to copy the passwords here as well?
 995            I don't know.  Need to figure this out   --jerry */
 996
 997         /* Passwords dealt with in caller --abartlet */
 998
 999         pdb_set_acct_ctrl(to, from->acb_info);
1000         pdb_set_unknown_3(to, from->unknown_3);
1001
1002         pdb_set_logon_divs(to, from->logon_divs);
1003         pdb_set_hours_len(to, from->logon_hrs.len);
1004         pdb_set_hours(to, from->logon_hrs.hours);
1005
1006         pdb_set_unknown_5(to, from->unknown_5);
1007         pdb_set_unknown_6(to, from->unknown_6);
1008 }
1009
1010
1011 /*************************************************************
1012  Change a password entry in the local smbpasswd file.
1013
1014  FIXME!!  The function needs to be abstracted into the
1015  passdb interface or something.  It is currently being called
1016  by _api_samr_create_user() in rpc_server/srv_samr.c,
1017  in SWAT and by smbpasswd/pdbedit.
1018
1019  --jerry
1020  *************************************************************/
1021
1022 BOOL local_password_change(const char *user_name, int local_flags,
1023                            const char *new_passwd,
1024                            char *err_str, size_t err_str_len,
1025                            char *msg_str, size_t msg_str_len)
1026 {
1027         struct passwd  *pwd = NULL;
1028         SAM_ACCOUNT     *sam_pass=NULL;
1029
1030         *err_str = '\0';
1031         *msg_str = '\0';
1032
1033         /* Get the smb passwd entry for this user */
1034         pdb_init_sam(&sam_pass);
1035         if (local_flags & LOCAL_DELETE_USER) {
1036                 if (!pdb_delete_sam_account(sam_pass)) {
1037                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1038                         pdb_free_sam(&sam_pass);
1039                         return False;
1040                 }
1041                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1042                 pdb_free_sam(&sam_pass);
1043                 return True;
1044         }
1045         if(!pdb_getsampwnam(sam_pass, user_name)) {
1046                 pdb_free_sam(&sam_pass);
1047
1048                 if (local_flags & LOCAL_ADD_USER) {
1049                         pwd = getpwnam_alloc(user_name);
1050                 } else {
1051                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1052                         return False;
1053                 }
1054
1055                 if (pwd) {
1056                         /* Local user found, so init from this */
1057                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1058                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1059                                 passwd_free(&pwd);
1060                                 return False;
1061                         }
1062
1063                         passwd_free(&pwd);
1064                 } else {
1065                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1066                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1067                                 return False;
1068                         }
1069
1070                         if (!pdb_set_username(sam_pass, user_name)) {
1071                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1072                                 pdb_free_sam(&sam_pass);
1073                                 return False;
1074                         }
1075                 }
1076                 if (local_flags & LOCAL_TRUST_ACCOUNT) {
1077                         if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST)) {
1078                                 slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1079                                 pdb_free_sam(&sam_pass);
1080                                 return False;
1081                         }
1082                 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1083                         if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST)) {
1084                                 slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1085                                 pdb_free_sam(&sam_pass);
1086                                 return False;
1087                         }
1088                 } else {
1089                         if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL)) {
1090                                 slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1091                                 pdb_free_sam(&sam_pass);
1092                                 return False;
1093                         }
1094                 }
1095
1096         } else {
1097                 /* the entry already existed */
1098                 local_flags &= ~LOCAL_ADD_USER;
1099         }
1100
1101         /*
1102          * We are root - just write the new password
1103          * and the valid last change time.
1104          */
1105
1106         if (local_flags & LOCAL_DISABLE_USER) {
1107                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED)) {
1108                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1109                         pdb_free_sam(&sam_pass);
1110                         return False;
1111                 }
1112         } else if (local_flags & LOCAL_ENABLE_USER) {
1113                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1114                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1115                         pdb_free_sam(&sam_pass);
1116                         return False;
1117                 }
1118         }
1119
1120         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1121                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ)) {
1122                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1123                         pdb_free_sam(&sam_pass);
1124                         return False;
1125                 }
1126         } else if (local_flags & LOCAL_SET_PASSWORD) {
1127                 /*
1128                  * If we're dealing with setting a completely empty user account
1129                  * ie. One with a password of 'XXXX', but not set disabled (like
1130                  * an account created from scratch) then if the old password was
1131                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1132                  * We remove that as we're giving this user their first password
1133                  * and the decision hasn't really been made to disable them (ie.
1134                  * don't create them disabled). JRA.
1135                  */
1136                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1137                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1138                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1139                                 pdb_free_sam(&sam_pass);
1140                                 return False;
1141                         }
1142                 }
1143                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ))) {
1144                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1145                         pdb_free_sam(&sam_pass);
1146                         return False;
1147                 }
1148
1149                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1150                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1151                         pdb_free_sam(&sam_pass);
1152                         return False;
1153                 }
1154         }
1155
1156         if (local_flags & LOCAL_ADD_USER) {
1157                 if (pdb_add_sam_account(sam_pass)) {
1158                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1159                         pdb_free_sam(&sam_pass);
1160                         return True;
1161                 } else {
1162                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1163                         pdb_free_sam(&sam_pass);
1164                         return False;
1165                 }
1166         } else {
1167                 if(!pdb_update_sam_account(sam_pass)) {
1168                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1169                         pdb_free_sam(&sam_pass);
1170                         return False;
1171                 }
1172                 if(local_flags & LOCAL_DISABLE_USER)
1173                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1174                 else if (local_flags & LOCAL_ENABLE_USER)
1175                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1176                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1177                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1178         }
1179
1180         pdb_free_sam(&sam_pass);
1181         return True;
1182 }