source3/passdb/passdb.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    Password and authentication handling
   5    Copyright (C) Jeremy Allison                 1996-2001
   6    Copyright (C) Luke Kenneth Casson Leighton   1996-1998
   7    Copyright (C) Gerald (Jerry) Carter          2000-2001
   8    Copyright (C) Andrew Bartlett                2001-2002
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26
  27 /*
  28  * This is set on startup - it defines the SID for this
  29  * machine, and therefore the SAM database for which it is
  30  * responsible.
  31  */
  32
  33 extern DOM_SID global_sam_sid;
  34
  35 /************************************************************
  36  Fill the SAM_ACCOUNT with default values.
  37  ***********************************************************/
  38
  39 static void pdb_fill_default_sam(SAM_ACCOUNT *user)
  40 {
  41         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  42
  43         /* Don't change these timestamp settings without a good reason.
  44            They are important for NT member server compatibility. */
  45
  46         user->private.init_flag             = FLAG_SAM_UNINIT;
  47         user->private.uid = user->private.gid       = -1;
  48
  49         user->private.logon_time            = (time_t)0;
  50         user->private.pass_last_set_time    = (time_t)0;
  51         user->private.pass_can_change_time  = (time_t)0;
  52         user->private.logoff_time           =
  53         user->private.kickoff_time          =
  54         user->private.pass_must_change_time = get_time_t_max();
  55         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  56         user->private.logon_divs = 168;         /* hours per week */
  57         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  58         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  59         user->private.unknown_5 = 0x00000000; /* don't know */
  60         user->private.unknown_6 = 0x000004ec; /* don't know */
  61
  62         /* Some parts of samba strlen their pdb_get...() returns,
  63            so this keeps the interface unchanged for now. */
  64
  65         user->private.username = "";
  66         user->private.domain = "";
  67         user->private.nt_username = "";
  68         user->private.full_name = "";
  69         user->private.home_dir = "";
  70         user->private.logon_script = "";
  71         user->private.profile_path = "";
  72         user->private.acct_desc = "";
  73         user->private.workstations = "";
  74         user->private.unknown_str = "";
  75         user->private.munged_dial = "";
  76 }
  77
  78 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
  79 {
  80         if (*user) {
  81                 talloc_destroy((*user)->mem_ctx);
  82                 *user = NULL;
  83         }
  84 }
  85
  86
  87 /**********************************************************************
  88  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
  89 ***********************************************************************/
  90
  91 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
  92 {
  93         if (*user != NULL) {
  94                 DEBUG(0,("pdb_init_sam: SAM_ACCOUNT was non NULL\n"));
  95 #if 0
  96                 smb_panic("NULL pointer passed to pdb_init_sam\n");
  97 #endif
  98                 return NT_STATUS_UNSUCCESSFUL;
  99         }
 100
 101         if (!mem_ctx) {
 102                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 103                 return NT_STATUS_UNSUCCESSFUL;
 104         }
 105
 106         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 107
 108         if (*user==NULL) {
 109                 DEBUG(0,("pdb_init_sam: error while allocating memory\n"));
 110                 return NT_STATUS_NO_MEMORY;
 111         }
 112
 113         (*user)->mem_ctx = mem_ctx;
 114
 115         (*user)->free_fn = NULL;
 116
 117         pdb_fill_default_sam(*user);
 118
 119         return NT_STATUS_OK;
 120 }
 121
 122
 123 /*************************************************************
 124  Alloc memory and initialises a struct sam_passwd.
 125  ************************************************************/
 126
 127 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 128 {
 129         TALLOC_CTX *mem_ctx;
 130         NTSTATUS nt_status;
 131
 132         mem_ctx = talloc_init_named("passdb internal SAM_ACCOUNT allocation");
 133
 134         if (!mem_ctx) {
 135                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 136                 return NT_STATUS_NO_MEMORY;
 137         }
 138
 139         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 140                 talloc_destroy(mem_ctx);
 141                 return nt_status;
 142         }
 143
 144         (*user)->free_fn = destroy_pdb_talloc;
 145
 146         return NT_STATUS_OK;
 147 }
 148
 149
 150 /*************************************************************
 151  Initialises a struct sam_passwd with sane values.
 152  ************************************************************/
 153
 154 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 155 {
 156         pstring str;
 157         GROUP_MAP map;
 158         uint32 rid;
 159         NTSTATUS nt_status;
 160
 161         if (!pwd) {
 162                 new_sam_acct = NULL;
 163                 return NT_STATUS_UNSUCCESSFUL;
 164         }
 165
 166         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 167                 new_sam_acct = NULL;
 168                 return nt_status;
 169         }
 170
 171         pdb_set_username(*new_sam_acct, pwd->pw_name);
 172         pdb_set_fullname(*new_sam_acct, pwd->pw_gecos);
 173
 174         pdb_set_uid(*new_sam_acct, pwd->pw_uid);
 175         pdb_set_gid(*new_sam_acct, pwd->pw_gid);
 176
 177         pdb_set_user_rid(*new_sam_acct, pdb_uid_to_user_rid(pwd->pw_uid));
 178
 179         /* call the mapping code here */
 180         if(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 181                 sid_peek_rid(&map.sid, &rid);
 182         }
 183         else {
 184                 rid=pdb_gid_to_group_rid(pwd->pw_gid);
 185         }
 186
 187         pdb_set_group_rid(*new_sam_acct, rid);
 188
 189         pstrcpy(str, lp_logon_path());
 190         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 191         pdb_set_profile_path(*new_sam_acct, str, False);
 192
 193         pstrcpy(str, lp_logon_home());
 194         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 195         pdb_set_homedir(*new_sam_acct, str, False);
 196
 197         pstrcpy(str, lp_logon_drive());
 198         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 199         pdb_set_dir_drive(*new_sam_acct, str, False);
 200
 201         pstrcpy(str, lp_logon_script());
 202         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 203         pdb_set_logon_script(*new_sam_acct, str, False);
 204
 205         return NT_STATUS_OK;
 206 }
 207
 208
 209 /**
 210  * Free the contets of the SAM_ACCOUNT, but not the structure.
 211  *
 212  * Also wipes the LM and NT hashes from memory.
 213  *
 214  * @param user SAM_ACCOUNT to free members of.
 215  **/
 216
 217 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 218 {
 219         /* As we start mallocing more strings this is where
 220            we should free them. */
 221
 222         data_blob_clear_free(&(user->private.lm_pw));
 223         data_blob_clear_free(&(user->private.nt_pw));
 224 }
 225
 226
 227 /************************************************************
 228  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 229  ***********************************************************/
 230
 231 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 232 {
 233         if (user == NULL) {
 234                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 235 #if 0
 236                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 237 #endif
 238                 return NT_STATUS_UNSUCCESSFUL;
 239         }
 240
 241         pdb_free_sam_contents(user);
 242
 243         pdb_fill_default_sam(user);
 244
 245         return NT_STATUS_OK;
 246 }
 247
 248
 249 /************************************************************
 250  Free the SAM_ACCOUNT and the member pointers.
 251  ***********************************************************/
 252
 253 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 254 {
 255         if (*user == NULL) {
 256                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 257 #if 0
 258                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 259 #endif
 260                 return NT_STATUS_UNSUCCESSFUL;
 261         }
 262
 263         pdb_free_sam_contents(*user);
 264
 265         if ((*user)->free_fn) {
 266                 (*user)->free_fn(user);
 267         }
 268
 269         return NT_STATUS_OK;
 270 }
 271
 272
 273 /**********************************************************
 274  Encode the account control bits into a string.
 275  length = length of string to encode into (including terminating
 276  null). length *MUST BE MORE THAN 2* !
 277  **********************************************************/
 278
 279 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 280 {
 281         static fstring acct_str;
 282         size_t i = 0;
 283
 284         acct_str[i++] = '[';
 285
 286         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 287         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 288         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 289         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 290         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 291         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 292         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 293         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 294         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 295         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 296         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 297
 298         for ( ; i < length - 2 ; i++ )
 299                 acct_str[i] = ' ';
 300
 301         i = length - 2;
 302         acct_str[i++] = ']';
 303         acct_str[i++] = '\0';
 304
 305         return acct_str;
 306 }
 307
 308 /**********************************************************
 309  Decode the account control bits from a string.
 310  **********************************************************/
 311
 312 uint16 pdb_decode_acct_ctrl(const char *p)
 313 {
 314         uint16 acct_ctrl = 0;
 315         BOOL finished = False;
 316
 317         /*
 318          * Check if the account type bits have been encoded after the
 319          * NT password (in the form [NDHTUWSLXI]).
 320          */
 321
 322         if (*p != '[')
 323                 return 0;
 324
 325         for (p++; *p && !finished; p++) {
 326                 switch (*p) {
 327                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 328                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 329                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 330                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 331                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 332                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 333                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 334                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 335                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 336                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 337                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 338             case ' ': { break; }
 339                         case ':':
 340                         case '\n':
 341                         case '\0':
 342                         case ']':
 343                         default:  { finished = True; }
 344                 }
 345         }
 346
 347         return acct_ctrl;
 348 }
 349
 350 /*************************************************************
 351  Routine to set 32 hex password characters from a 16 byte array.
 352 **************************************************************/
 353
 354 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 355 {
 356         if (pwd != NULL) {
 357                 int i;
 358                 for (i = 0; i < 16; i++)
 359                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 360         } else {
 361                 if (acct_ctrl & ACB_PWNOTREQ)
 362                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 363                 else
 364                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 365         }
 366 }
 367
 368 /*************************************************************
 369  Routine to get the 32 hex characters and turn them
 370  into a 16 byte array.
 371 **************************************************************/
 372
 373 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 374 {
 375         int i;
 376         unsigned char   lonybble, hinybble;
 377         char           *hexchars = "0123456789ABCDEF";
 378         char           *p1, *p2;
 379
 380         if (!p)
 381                 return (False);
 382
 383         for (i = 0; i < 32; i += 2) {
 384                 hinybble = toupper(p[i]);
 385                 lonybble = toupper(p[i + 1]);
 386
 387                 p1 = strchr(hexchars, hinybble);
 388                 p2 = strchr(hexchars, lonybble);
 389
 390                 if (!p1 || !p2)
 391                         return (False);
 392
 393                 hinybble = PTR_DIFF(p1, hexchars);
 394                 lonybble = PTR_DIFF(p2, hexchars);
 395
 396                 pwd[i / 2] = (hinybble << 4) | lonybble;
 397         }
 398         return (True);
 399 }
 400
 401 /*******************************************************************
 402  Group and User RID username mapping function
 403  ********************************************************************/
 404
 405 BOOL pdb_name_to_rid(const char *user_name, uint32 *u_rid, uint32 *g_rid)
 406 {
 407         GROUP_MAP map;
 408         struct passwd *pw = Get_Pwnam(user_name);
 409
 410         if (u_rid == NULL || g_rid == NULL || user_name == NULL)
 411                 return False;
 412
 413         if (!pw) {
 414                 DEBUG(1,("Username %s is invalid on this system\n", user_name));
 415                 return False;
 416         }
 417
 418         /* turn the unix UID into a Domain RID.  this is what the posix
 419            sub-system does (adds 1000 to the uid) */
 420         *u_rid = pdb_uid_to_user_rid(pw->pw_uid);
 421
 422         /* absolutely no idea what to do about the unix GID to Domain RID mapping */
 423         /* map it ! */
 424         if (get_group_map_from_gid(pw->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 425                 sid_peek_rid(&map.sid, g_rid);
 426         } else
 427                 *g_rid = pdb_gid_to_group_rid(pw->pw_gid);
 428
 429         return True;
 430 }
 431
 432 /*******************************************************************
 433  Converts NT user RID to a UNIX uid.
 434  ********************************************************************/
 435
 436 uid_t pdb_user_rid_to_uid(uint32 user_rid)
 437 {
 438         return (uid_t)(((user_rid & (~USER_RID_TYPE))- 1000)/RID_MULTIPLIER);
 439 }
 440
 441
 442 /*******************************************************************
 443  Converts NT group RID to a UNIX gid.
 444  ********************************************************************/
 445
 446 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 447 {
 448         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- 1000)/RID_MULTIPLIER);
 449 }
 450
 451 /*******************************************************************
 452  converts UNIX uid to an NT User RID.
 453  ********************************************************************/
 454
 455 uint32 pdb_uid_to_user_rid(uid_t uid)
 456 {
 457         return (((((uint32)uid)*RID_MULTIPLIER) + 1000) | USER_RID_TYPE);
 458 }
 459
 460 /*******************************************************************
 461  converts NT Group RID to a UNIX uid.
 462
 463  warning: you must not call that function only
 464  you must do a call to the group mapping first.
 465  there is not anymore a direct link between the gid and the rid.
 466  ********************************************************************/
 467
 468 uint32 pdb_gid_to_group_rid(gid_t gid)
 469 {
 470   return (((((uint32)gid)*RID_MULTIPLIER) + 1000) | GROUP_RID_TYPE);
 471 }
 472
 473 /*******************************************************************
 474  Decides if a RID is a well known RID.
 475  ********************************************************************/
 476
 477 static BOOL pdb_rid_is_well_known(uint32 rid)
 478 {
 479   return (rid < 1000);
 480 }
 481
 482 /*******************************************************************
 483  Decides if a RID is a user or group RID.
 484  ********************************************************************/
 485
 486 BOOL pdb_rid_is_user(uint32 rid)
 487 {
 488   /* lkcl i understand that NT attaches an enumeration to a RID
 489    * such that it can be identified as either a user, group etc
 490    * type.  there are 5 such categories, and they are documented.
 491    */
 492    if(pdb_rid_is_well_known(rid)) {
 493       /*
 494        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 495        * and DOMAIN_USER_RID_GUEST.
 496        */
 497      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 498        return True;
 499    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 500      return True;
 501    }
 502    return False;
 503 }
 504
 505 /*******************************************************************
 506  Convert a rid into a name. Used in the lookup SID rpc.
 507  ********************************************************************/
 508
 509 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 510 {
 511         uint32 rid;
 512         BOOL is_user;
 513
 514         sid_peek_rid(sid, &rid);
 515         is_user = pdb_rid_is_user(rid);
 516         *psid_name_use = SID_NAME_UNKNOWN;
 517
 518         DEBUG(5,("local_lookup_sid: looking up %s RID %u.\n", is_user ? "user" :
 519                         "group", (unsigned int)rid));
 520
 521         if(is_user) {
 522                 if(rid == DOMAIN_USER_RID_ADMIN) {
 523                         pstring admin_users;
 524                         char *p = admin_users;
 525                         *psid_name_use = SID_NAME_USER;
 526                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 527                                 fstrcpy(name, "Administrator");
 528                 } else if (rid == DOMAIN_USER_RID_GUEST) {
 529                         pstring guest_users;
 530                         char *p = guest_users;
 531                         *psid_name_use = SID_NAME_USER;
 532                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 533                                 fstrcpy(name, "Guest");
 534                 } else {
 535                         uid_t uid;
 536                         struct passwd *pass;
 537
 538                         /*
 539                          * Don't try to convert the rid to a name if
 540                          * running in appliance mode
 541                          */
 542                         if (lp_hide_local_users())
 543                                 return False;
 544
 545                         uid = pdb_user_rid_to_uid(rid);
 546                         pass = sys_getpwuid(uid);
 547
 548                         *psid_name_use = SID_NAME_USER;
 549
 550                         DEBUG(5,("local_lookup_sid: looking up uid %u %s\n", (unsigned int)uid,
 551                                 pass ? "succeeded" : "failed" ));
 552
 553                         if(!pass) {
 554                                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 555                                 return True;
 556                         }
 557
 558                         fstrcpy(name, pass->pw_name);
 559
 560                         DEBUG(5,("local_lookup_sid: found user %s for rid %u\n", name,
 561                                 (unsigned int)rid ));
 562                 }
 563
 564         } else {
 565                 gid_t gid;
 566                 struct group *gr;
 567                 GROUP_MAP map;
 568
 569                 /*
 570                  * Don't try to convert the rid to a name if running
 571                  * in appliance mode
 572                  */
 573
 574                 if (lp_hide_local_users())
 575                         return False;
 576
 577                 /* check if it's a mapped group */
 578                 if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 579                         if (map.gid!=-1) {
 580                                 DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 581                                 fstrcpy(name, map.nt_name);
 582                                 *psid_name_use = map.sid_name_use;
 583                                 return True;
 584                         }
 585                 }
 586
 587                 gid = pdb_group_rid_to_gid(rid);
 588                 gr = getgrgid(gid);
 589
 590                 *psid_name_use = SID_NAME_ALIAS;
 591
 592                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 593                         gr ? "succeeded" : "failed" ));
 594
 595                 if(!gr) {
 596                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 597                         return False;
 598                 }
 599
 600                 fstrcpy( name, gr->gr_name);
 601
 602                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 603                         (unsigned int)rid ));
 604         }
 605
 606         return True;
 607 }
 608
 609 /*******************************************************************
 610  Convert a name into a SID. Used in the lookup name rpc.
 611  ********************************************************************/
 612
 613 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 614 {
 615         extern DOM_SID global_sid_World_Domain;
 616         struct passwd *pass = NULL;
 617         DOM_SID local_sid;
 618         fstring user;
 619         SAM_ACCOUNT *sam_account = NULL;
 620
 621         *psid_name_use = SID_NAME_UNKNOWN;
 622
 623         /*
 624          * user may be quoted a const string, and map_username and
 625          * friends can modify it. Make a modifiable copy. JRA.
 626          */
 627
 628         fstrcpy(user, c_user);
 629
 630         sid_copy(&local_sid, &global_sam_sid);
 631
 632         /*
 633          * Special case for MACHINE\Everyone. Map to the world_sid.
 634          */
 635
 636         if(strequal(user, "Everyone")) {
 637                 sid_copy( psid, &global_sid_World_Domain);
 638                 sid_append_rid(psid, 0);
 639                 *psid_name_use = SID_NAME_ALIAS;
 640                 return True;
 641         }
 642
 643         /*
 644          * Don't lookup local unix users if running in appliance mode
 645          */
 646         if (lp_hide_local_users())
 647                 return False;
 648
 649         (void)map_username(user);
 650
 651         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 652                 return False;
 653         }
 654
 655         if (pdb_getsampwnam(sam_account, user)) {
 656                 sid_append_rid( &local_sid, pdb_get_user_rid(sam_account));
 657                 *psid_name_use = SID_NAME_USER;
 658                 pdb_free_sam(&sam_account);
 659
 660         } else if((pass = Get_Pwnam(user))) {
 661                 sid_append_rid( &local_sid, pdb_uid_to_user_rid(pass->pw_uid));
 662                 *psid_name_use = SID_NAME_USER;
 663                 pdb_free_sam(&sam_account);
 664
 665         } else {
 666                 /*
 667                  * Maybe it was a group ?
 668                  */
 669                 struct group *grp;
 670                 GROUP_MAP map;
 671
 672                 pdb_free_sam(&sam_account);
 673
 674                 /* check if it's a mapped group */
 675                 if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 676                         if (map.gid!=-1) {
 677                                 /* yes it's a mapped group to a valid unix group */
 678                                 sid_copy(&local_sid, &map.sid);
 679                                 *psid_name_use = map.sid_name_use;
 680                         }
 681                         else
 682                                 /* it's a correct name but not mapped so it points to nothing*/
 683                                 return False;
 684                 } else {
 685                         /* it's not a mapped group */
 686                         grp = getgrnam(user);
 687                         if(!grp)
 688                                 return False;
 689
 690                         /*
 691                          *check if it's mapped, if it is reply it doesn't exist
 692                          *
 693                          * that's to prevent this case:
 694                          *
 695                          * unix group ug is mapped to nt group ng
 696                          * someone does a lookup on ug
 697                          * we must not reply as it doesn't "exist" anymore
 698                          * for NT. For NT only ng exists.
 699                          * JFM, 30/11/2001
 700                          */
 701
 702                         if(get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 703                                 return False;
 704                         }
 705
 706                         sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 707                         *psid_name_use = SID_NAME_ALIAS;
 708                 }
 709         }
 710
 711         sid_copy( psid, &local_sid);
 712
 713         return True;
 714 }
 715
 716 /****************************************************************************
 717  Convert a uid to SID - locally.
 718 ****************************************************************************/
 719
 720 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 721 {
 722         extern DOM_SID global_sam_sid;
 723
 724         sid_copy(psid, &global_sam_sid);
 725         sid_append_rid(psid, pdb_uid_to_user_rid(uid));
 726
 727         return psid;
 728 }
 729
 730 /****************************************************************************
 731  Convert a SID to uid - locally.
 732 ****************************************************************************/
 733
 734 BOOL local_sid_to_uid(uid_t *puid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 735 {
 736         extern DOM_SID global_sam_sid;
 737
 738         DOM_SID dom_sid;
 739         uint32 rid;
 740         fstring str;
 741         struct passwd *pass;
 742
 743         *name_type = SID_NAME_UNKNOWN;
 744
 745         sid_copy(&dom_sid, psid);
 746         sid_split_rid(&dom_sid, &rid);
 747
 748         if (!pdb_rid_is_user(rid))
 749                 return False;
 750
 751         /*
 752          * We can only convert to a uid if this is our local
 753          * Domain SID (ie. we are the controling authority).
 754          */
 755         if (!sid_equal(&global_sam_sid, &dom_sid))
 756                 return False;
 757
 758         *puid = pdb_user_rid_to_uid(rid);
 759
 760         /*
 761          * Ensure this uid really does exist.
 762          */
 763         if(!(pass = getpwuid_alloc(*puid)))
 764                 return False;
 765
 766         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 767                 (unsigned int)*puid, pass->pw_name ));
 768
 769         passwd_free(&pass);
 770
 771         *name_type = SID_NAME_USER;
 772
 773         return True;
 774 }
 775
 776 /****************************************************************************
 777  Convert a gid to SID - locally.
 778 ****************************************************************************/
 779
 780 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 781 {
 782         extern DOM_SID global_sam_sid;
 783         GROUP_MAP map;
 784
 785         sid_copy(psid, &global_sam_sid);
 786
 787         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 788                 sid_copy(psid, &map.sid);
 789         }
 790         else {
 791                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 792         }
 793
 794         return psid;
 795 }
 796
 797 /****************************************************************************
 798  Convert a SID to gid - locally.
 799 ****************************************************************************/
 800
 801 BOOL local_sid_to_gid(gid_t *pgid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 802 {
 803         extern DOM_SID global_sam_sid;
 804         DOM_SID dom_sid;
 805         uint32 rid;
 806         fstring str;
 807         struct group *grp;
 808         GROUP_MAP map;
 809
 810         *name_type = SID_NAME_UNKNOWN;
 811
 812         sid_copy(&dom_sid, psid);
 813         sid_split_rid(&dom_sid, &rid);
 814
 815         /*
 816          * We can only convert to a gid if this is our local
 817          * Domain SID (ie. we are the controling authority).
 818          *
 819          * Or in the Builtin SID too. JFM, 11/30/2001
 820          */
 821
 822         if (!sid_equal(&global_sam_sid, &dom_sid))
 823                 return False;
 824
 825         if (pdb_rid_is_user(rid))
 826                 return False;
 827
 828         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 829
 830                 /* the SID is in the mapping table but not mapped */
 831                 if (map.gid==-1)
 832                         return False;
 833
 834                 sid_peek_rid(&map.sid, &rid);
 835                 *pgid = rid;
 836                 *name_type = map.sid_name_use;
 837         } else {
 838                 *pgid = pdb_group_rid_to_gid(rid);
 839                 *name_type = SID_NAME_ALIAS;
 840         }
 841
 842         /*
 843          * Ensure this gid really does exist.
 844          */
 845
 846         if(!(grp = getgrgid(*pgid)))
 847                 return False;
 848
 849         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u) (%s).\n", sid_to_string( str, psid),
 850                 (unsigned int)*pgid, grp->gr_name ));
 851
 852         return True;
 853 }
 854
 855 /**
 856  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 857  * @return static buffer containing the converted string
 858  **/
 859
 860 static char *pdb_convert(const UNISTR2 *from)
 861 {
 862         static pstring convert_buffer;
 863         *convert_buffer = 0;
 864         if (!from) {
 865                 return convert_buffer;
 866         }
 867
 868         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 869         return convert_buffer;
 870 }
 871
 872 /*************************************************************
 873  Copies a SAM_USER_INFO_23 to a SAM_ACCOUNT
 874  **************************************************************/
 875
 876 void copy_id23_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_23 *from)
 877 {
 878
 879         if (from == NULL || to == NULL)
 880                 return;
 881
 882         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time));
 883         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time));
 884         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time));
 885         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
 886         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time));
 887         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time));
 888
 889         if (from->uni_user_name.buffer)
 890                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
 891         if (from->uni_full_name.buffer)
 892                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
 893         if (from->uni_home_dir.buffer)
 894                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
 895         if (from->uni_dir_drive.buffer)
 896                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
 897         if (from->uni_logon_script.buffer)
 898                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
 899         if (from->uni_profile_path.buffer)
 900                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
 901         if (from->uni_acct_desc.buffer)
 902                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
 903         if (from->uni_workstations.buffer)
 904                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
 905         if (from->uni_unknown_str.buffer)
 906                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
 907         if (from->uni_munged_dial.buffer)
 908                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
 909
 910         if (from->user_rid)
 911                 pdb_set_user_rid(to, from->user_rid);
 912         if (from->group_rid)
 913                 pdb_set_group_rid(to, from->group_rid);
 914
 915         pdb_set_acct_ctrl(to, from->acb_info);
 916         pdb_set_unknown_3(to, from->unknown_3);
 917
 918         pdb_set_logon_divs(to, from->logon_divs);
 919         pdb_set_hours_len(to, from->logon_hrs.len);
 920         pdb_set_hours(to, from->logon_hrs.hours);
 921
 922         pdb_set_unknown_5(to, from->unknown_5);
 923         pdb_set_unknown_6(to, from->unknown_6);
 924 }
 925
 926
 927 /*************************************************************
 928  Copies a sam passwd.
 929  **************************************************************/
 930
 931 void copy_id21_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_21 *from)
 932 {
 933         if (from == NULL || to == NULL)
 934                 return;
 935
 936         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time));
 937         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time));
 938         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time));
 939         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
 940         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time));
 941         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time));
 942
 943         if (from->uni_user_name.buffer)
 944                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
 945         if (from->uni_full_name.buffer)
 946                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
 947         if (from->uni_home_dir.buffer)
 948                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
 949         if (from->uni_dir_drive.buffer)
 950                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
 951         if (from->uni_logon_script.buffer)
 952                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
 953         if (from->uni_profile_path.buffer)
 954                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
 955         if (from->uni_acct_desc.buffer)
 956                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
 957         if (from->uni_workstations.buffer)
 958                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
 959         if (from->uni_unknown_str.buffer)
 960                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
 961         if (from->uni_munged_dial.buffer)
 962                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
 963
 964         if (from->user_rid)
 965                 pdb_set_user_rid(to, from->user_rid);
 966         if (from->group_rid)
 967                 pdb_set_group_rid(to, from->group_rid);
 968
 969         /* FIXME!!  Do we need to copy the passwords here as well?
 970            I don't know.  Need to figure this out   --jerry */
 971
 972         /* Passwords dealt with in caller --abartlet */
 973
 974         pdb_set_acct_ctrl(to, from->acb_info);
 975         pdb_set_unknown_3(to, from->unknown_3);
 976
 977         pdb_set_logon_divs(to, from->logon_divs);
 978         pdb_set_hours_len(to, from->logon_hrs.len);
 979         pdb_set_hours(to, from->logon_hrs.hours);
 980
 981         pdb_set_unknown_5(to, from->unknown_5);
 982         pdb_set_unknown_6(to, from->unknown_6);
 983 }
 984
 985
 986 /*************************************************************
 987  Change a password entry in the local smbpasswd file.
 988
 989  FIXME!!  The function needs to be abstracted into the
 990  passdb interface or something.  It is currently being called
 991  by _api_samr_create_user() in rpc_server/srv_samr.c,
 992  in SWAT and by smbpasswd/pdbedit.
 993
 994  --jerry
 995  *************************************************************/
 996
 997 BOOL local_password_change(const char *user_name, int local_flags,
 998                            const char *new_passwd,
 999                            char *err_str, size_t err_str_len,
1000                            char *msg_str, size_t msg_str_len)
1001 {
1002         struct passwd  *pwd = NULL;
1003         SAM_ACCOUNT     *sam_pass=NULL;
1004
1005         *err_str = '\0';
1006         *msg_str = '\0';
1007
1008         /* Get the smb passwd entry for this user */
1009         pdb_init_sam(&sam_pass);
1010         if(!pdb_getsampwnam(sam_pass, user_name)) {
1011                 pdb_free_sam(&sam_pass);
1012
1013                 if (local_flags & LOCAL_ADD_USER) {
1014                         pwd = getpwnam_alloc(user_name);
1015                 } else {
1016                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1017                         return False;
1018                 }
1019
1020                 if (pwd) {
1021                         /* Local user found, so init from this */
1022                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1023                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1024                                 passwd_free(&pwd);
1025                                 return False;
1026                         }
1027
1028                         passwd_free(&pwd);
1029                 } else {
1030                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1031                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1032                                 return False;
1033                         }
1034
1035                         if (!pdb_set_username(sam_pass, user_name)) {
1036                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1037                                 pdb_free_sam(&sam_pass);
1038                                 return False;
1039                         }
1040                 }
1041                 if (local_flags & LOCAL_TRUST_ACCOUNT) {
1042                         if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST)) {
1043                                 slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1044                                 pdb_free_sam(&sam_pass);
1045                                 return False;
1046                         }
1047                 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1048                         if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST)) {
1049                                 slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1050                                 pdb_free_sam(&sam_pass);
1051                                 return False;
1052                         }
1053                 } else {
1054                         if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL)) {
1055                                 slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1056                                 pdb_free_sam(&sam_pass);
1057                                 return False;
1058                         }
1059                 }
1060
1061         } else {
1062                 /* the entry already existed */
1063                 local_flags &= ~LOCAL_ADD_USER;
1064         }
1065
1066         /*
1067          * We are root - just write the new password
1068          * and the valid last change time.
1069          */
1070
1071         if (local_flags & LOCAL_DISABLE_USER) {
1072                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED)) {
1073                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1074                         pdb_free_sam(&sam_pass);
1075                         return False;
1076                 }
1077         } else if (local_flags & LOCAL_ENABLE_USER) {
1078                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1079                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1080                         pdb_free_sam(&sam_pass);
1081                         return False;
1082                 }
1083         }
1084
1085         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1086                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ)) {
1087                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1088                         pdb_free_sam(&sam_pass);
1089                         return False;
1090                 }
1091         } else if (local_flags & LOCAL_SET_PASSWORD) {
1092                 /*
1093                  * If we're dealing with setting a completely empty user account
1094                  * ie. One with a password of 'XXXX', but not set disabled (like
1095                  * an account created from scratch) then if the old password was
1096                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1097                  * We remove that as we're giving this user their first password
1098                  * and the decision hasn't really been made to disable them (ie.
1099                  * don't create them disabled). JRA.
1100                  */
1101                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1102                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1103                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1104                                 pdb_free_sam(&sam_pass);
1105                                 return False;
1106                         }
1107                 }
1108                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ))) {
1109                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1110                         pdb_free_sam(&sam_pass);
1111                         return False;
1112                 }
1113
1114                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1115                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1116                         pdb_free_sam(&sam_pass);
1117                         return False;
1118                 }
1119         }
1120
1121         if (local_flags & LOCAL_ADD_USER) {
1122                 if (pdb_add_sam_account(sam_pass)) {
1123                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1124                         pdb_free_sam(&sam_pass);
1125                         return True;
1126                 } else {
1127                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1128                         pdb_free_sam(&sam_pass);
1129                         return False;
1130                 }
1131         } else if (local_flags & LOCAL_DELETE_USER) {
1132                 if (!pdb_delete_sam_account(sam_pass)) {
1133                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1134                         pdb_free_sam(&sam_pass);
1135                         return False;
1136                 }
1137                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1138         } else {
1139                 if(!pdb_update_sam_account(sam_pass)) {
1140                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1141                         pdb_free_sam(&sam_pass);
1142                         return False;
1143                 }
1144                 if(local_flags & LOCAL_DISABLE_USER)
1145                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1146                 else if (local_flags & LOCAL_ENABLE_USER)
1147                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1148                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1149                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1150         }
1151
1152         pdb_free_sam(&sam_pass);
1153         return True;
1154 }