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("non-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         /* let the backends set the rid!!
 177         pdb_set_user_rid(*new_sam_acct, pdb_uid_to_user_rid(pwd->pw_uid));
 178         -- simo */
 179
 180         /* call the mapping code here */
 181         if(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 182                 sid_peek_rid(&map.sid, &rid);
 183         }
 184         else {
 185                 rid=pdb_gid_to_group_rid(pwd->pw_gid);
 186         }
 187
 188         pdb_set_group_rid(*new_sam_acct, rid);
 189
 190         pstrcpy(str, lp_logon_path());
 191         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 192         pdb_set_profile_path(*new_sam_acct, str, False);
 193
 194         pstrcpy(str, lp_logon_home());
 195         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 196         pdb_set_homedir(*new_sam_acct, str, False);
 197
 198         pstrcpy(str, lp_logon_drive());
 199         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 200         pdb_set_dir_drive(*new_sam_acct, str, False);
 201
 202         pstrcpy(str, lp_logon_script());
 203         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 204         pdb_set_logon_script(*new_sam_acct, str, False);
 205
 206         return NT_STATUS_OK;
 207 }
 208
 209
 210 /**
 211  * Free the contets of the SAM_ACCOUNT, but not the structure.
 212  *
 213  * Also wipes the LM and NT hashes from memory.
 214  *
 215  * @param user SAM_ACCOUNT to free members of.
 216  **/
 217
 218 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 219 {
 220         /* As we start mallocing more strings this is where
 221            we should free them. */
 222
 223         data_blob_clear_free(&(user->private.lm_pw));
 224         data_blob_clear_free(&(user->private.nt_pw));
 225 }
 226
 227
 228 /************************************************************
 229  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 230  ***********************************************************/
 231
 232 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 233 {
 234         if (user == NULL) {
 235                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 236 #if 0
 237                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 238 #endif
 239                 return NT_STATUS_UNSUCCESSFUL;
 240         }
 241
 242         pdb_free_sam_contents(user);
 243
 244         pdb_fill_default_sam(user);
 245
 246         return NT_STATUS_OK;
 247 }
 248
 249
 250 /************************************************************
 251  Free the SAM_ACCOUNT and the member pointers.
 252  ***********************************************************/
 253
 254 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 255 {
 256         if (*user == NULL) {
 257                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 258 #if 0
 259                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 260 #endif
 261                 return NT_STATUS_UNSUCCESSFUL;
 262         }
 263
 264         pdb_free_sam_contents(*user);
 265
 266         if ((*user)->free_fn) {
 267                 (*user)->free_fn(user);
 268         }
 269
 270         return NT_STATUS_OK;
 271 }
 272
 273
 274 /**********************************************************
 275  Encode the account control bits into a string.
 276  length = length of string to encode into (including terminating
 277  null). length *MUST BE MORE THAN 2* !
 278  **********************************************************/
 279
 280 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 281 {
 282         static fstring acct_str;
 283         size_t i = 0;
 284
 285         acct_str[i++] = '[';
 286
 287         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 288         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 289         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 290         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 291         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 292         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 293         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 294         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 295         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 296         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 297         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 298
 299         for ( ; i < length - 2 ; i++ )
 300                 acct_str[i] = ' ';
 301
 302         i = length - 2;
 303         acct_str[i++] = ']';
 304         acct_str[i++] = '\0';
 305
 306         return acct_str;
 307 }
 308
 309 /**********************************************************
 310  Decode the account control bits from a string.
 311  **********************************************************/
 312
 313 uint16 pdb_decode_acct_ctrl(const char *p)
 314 {
 315         uint16 acct_ctrl = 0;
 316         BOOL finished = False;
 317
 318         /*
 319          * Check if the account type bits have been encoded after the
 320          * NT password (in the form [NDHTUWSLXI]).
 321          */
 322
 323         if (*p != '[')
 324                 return 0;
 325
 326         for (p++; *p && !finished; p++) {
 327                 switch (*p) {
 328                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 329                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 330                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 331                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 332                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 333                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 334                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 335                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 336                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 337                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 338                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 339             case ' ': { break; }
 340                         case ':':
 341                         case '\n':
 342                         case '\0':
 343                         case ']':
 344                         default:  { finished = True; }
 345                 }
 346         }
 347
 348         return acct_ctrl;
 349 }
 350
 351 /*************************************************************
 352  Routine to set 32 hex password characters from a 16 byte array.
 353 **************************************************************/
 354
 355 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 356 {
 357         if (pwd != NULL) {
 358                 int i;
 359                 for (i = 0; i < 16; i++)
 360                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 361         } else {
 362                 if (acct_ctrl & ACB_PWNOTREQ)
 363                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 364                 else
 365                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 366         }
 367 }
 368
 369 /*************************************************************
 370  Routine to get the 32 hex characters and turn them
 371  into a 16 byte array.
 372 **************************************************************/
 373
 374 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 375 {
 376         int i;
 377         unsigned char   lonybble, hinybble;
 378         char           *hexchars = "0123456789ABCDEF";
 379         char           *p1, *p2;
 380
 381         if (!p)
 382                 return (False);
 383
 384         for (i = 0; i < 32; i += 2) {
 385                 hinybble = toupper(p[i]);
 386                 lonybble = toupper(p[i + 1]);
 387
 388                 p1 = strchr(hexchars, hinybble);
 389                 p2 = strchr(hexchars, lonybble);
 390
 391                 if (!p1 || !p2)
 392                         return (False);
 393
 394                 hinybble = PTR_DIFF(p1, hexchars);
 395                 lonybble = PTR_DIFF(p2, hexchars);
 396
 397                 pwd[i / 2] = (hinybble << 4) | lonybble;
 398         }
 399         return (True);
 400 }
 401
 402 #if 0 /* seem it is not used by anyone */
 403 /*******************************************************************
 404  Group and User RID username mapping function
 405  ********************************************************************/
 406
 407 BOOL pdb_name_to_rid(const char *user_name, uint32 *u_rid, uint32 *g_rid)
 408 {
 409         GROUP_MAP map;
 410         struct passwd *pw = Get_Pwnam(user_name);
 411
 412         if (u_rid == NULL || g_rid == NULL || user_name == NULL)
 413                 return False;
 414
 415         if (!pw) {
 416                 DEBUG(1,("Username %s is invalid on this system\n", user_name));
 417                 return False;
 418         }
 419
 420         /* turn the unix UID into a Domain RID.  this is what the posix
 421            sub-system does (adds 1000 to the uid) */
 422         *u_rid = fallback_pdb_uid_to_user_rid(pw->pw_uid);
 423
 424         /* absolutely no idea what to do about the unix GID to Domain RID mapping */
 425         /* map it ! */
 426         if (get_group_map_from_gid(pw->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 427                 sid_peek_rid(&map.sid, g_rid);
 428         } else
 429                 *g_rid = pdb_gid_to_group_rid(pw->pw_gid);
 430
 431         return True;
 432 }
 433 #endif /* seem it is not used by anyone */
 434
 435 /*******************************************************************
 436  Converts NT user RID to a UNIX uid.
 437  ********************************************************************/
 438
 439 static uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 440 {
 441         return (uid_t)(((user_rid & (~USER_RID_TYPE))- 1000)/RID_MULTIPLIER);
 442 }
 443
 444
 445 /*******************************************************************
 446  converts UNIX uid to an NT User RID.
 447  ********************************************************************/
 448
 449 static uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 450 {
 451         return (((((uint32)uid)*RID_MULTIPLIER) + 1000) | USER_RID_TYPE);
 452 }
 453
 454 /*******************************************************************
 455  Converts NT group RID to a UNIX gid.
 456  ********************************************************************/
 457
 458 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 459 {
 460         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- 1000)/RID_MULTIPLIER);
 461 }
 462
 463 /*******************************************************************
 464  converts NT Group RID to a UNIX uid.
 465
 466  warning: you must not call that function only
 467  you must do a call to the group mapping first.
 468  there is not anymore a direct link between the gid and the rid.
 469  ********************************************************************/
 470
 471 uint32 pdb_gid_to_group_rid(gid_t gid)
 472 {
 473   return (((((uint32)gid)*RID_MULTIPLIER) + 1000) | GROUP_RID_TYPE);
 474 }
 475
 476 /*******************************************************************
 477  Decides if a RID is a well known RID.
 478  ********************************************************************/
 479
 480 static BOOL pdb_rid_is_well_known(uint32 rid)
 481 {
 482   return (rid < 1000);
 483 }
 484
 485 /*******************************************************************
 486  Decides if a RID is a user or group RID.
 487  ********************************************************************/
 488
 489 BOOL pdb_rid_is_user(uint32 rid)
 490 {
 491   /* lkcl i understand that NT attaches an enumeration to a RID
 492    * such that it can be identified as either a user, group etc
 493    * type.  there are 5 such categories, and they are documented.
 494    */
 495    if(pdb_rid_is_well_known(rid)) {
 496       /*
 497        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 498        * and DOMAIN_USER_RID_GUEST.
 499        */
 500      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 501        return True;
 502    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 503      return True;
 504    }
 505    return False;
 506 }
 507
 508 /*******************************************************************
 509  Convert a rid into a name. Used in the lookup SID rpc.
 510  ********************************************************************/
 511
 512 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 513 {
 514         uint32 rid;
 515         BOOL is_user;
 516         SAM_ACCOUNT *sam_account = NULL;
 517         BOOL found = False;
 518
 519         sid_peek_rid(sid, &rid);
 520         is_user = pdb_rid_is_user(rid);
 521         *psid_name_use = SID_NAME_UNKNOWN;
 522
 523         DEBUG(5,("local_lookup_sid: looking up %s RID %u.\n", is_user ? "user" :
 524                         "group", (unsigned int)rid));
 525
 526         if(is_user) {
 527                 if(rid == DOMAIN_USER_RID_ADMIN) {
 528                         pstring admin_users;
 529                         char *p = admin_users;
 530                         *psid_name_use = SID_NAME_USER;
 531                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 532                                 fstrcpy(name, "Administrator");
 533                 } else if (rid == DOMAIN_USER_RID_GUEST) {
 534                         pstring guest_users;
 535                         char *p = guest_users;
 536                         *psid_name_use = SID_NAME_USER;
 537                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 538                                 fstrcpy(name, "Guest");
 539                 } else {
 540                         uid_t uid;
 541                         struct passwd *pass;
 542
 543                         /*
 544                          * Don't try to convert the rid to a name if
 545                          * running in appliance mode
 546                          */
 547                         if (lp_hide_local_users())
 548                                 return False;
 549
 550                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 551                                 return False;
 552                         }
 553
 554                         if (pdb_getsampwrid(sam_account, rid)) {
 555                                 fstrcpy(name, pdb_get_username(sam_account));
 556                                 *psid_name_use = SID_NAME_USER;
 557                                 found = True;
 558                         }
 559
 560                         pdb_free_sam(&sam_account);
 561
 562                         if (found) {
 563                                 return True;
 564                         }
 565
 566                         uid = fallback_pdb_user_rid_to_uid(rid);
 567                         pass = getpwuid_alloc(uid);
 568
 569                         *psid_name_use = SID_NAME_USER;
 570
 571                         DEBUG(5,("local_lookup_sid: looking up uid %u %s\n", (unsigned int)uid,
 572                                  pass ? "succeeded" : "failed" ));
 573
 574                         if(!pass) {
 575                                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 576                                 return True;
 577                         }
 578
 579                         fstrcpy(name, pass->pw_name);
 580
 581                         DEBUG(5,("local_lookup_sid: found user %s for rid %u\n", name,
 582                                  (unsigned int)rid ));
 583
 584                         passwd_free(&pass);
 585                 }
 586
 587         } else {
 588                 gid_t gid;
 589                 struct group *gr;
 590                 GROUP_MAP map;
 591
 592                 /*
 593                  * Don't try to convert the rid to a name if running
 594                  * in appliance mode
 595                  */
 596
 597                 if (lp_hide_local_users())
 598                         return False;
 599
 600                 /* check if it's a mapped group */
 601                 if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 602                         if (map.gid!=-1) {
 603                                 DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 604                                 fstrcpy(name, map.nt_name);
 605                                 *psid_name_use = map.sid_name_use;
 606                                 return True;
 607                         }
 608                 }
 609
 610                 gid = pdb_group_rid_to_gid(rid);
 611                 gr = getgrgid(gid);
 612
 613                 *psid_name_use = SID_NAME_ALIAS;
 614
 615                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 616                         gr ? "succeeded" : "failed" ));
 617
 618                 if(!gr) {
 619                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 620                         return False;
 621                 }
 622
 623                 fstrcpy( name, gr->gr_name);
 624
 625                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 626                         (unsigned int)rid ));
 627         }
 628
 629         return True;
 630 }
 631
 632 /*******************************************************************
 633  Convert a name into a SID. Used in the lookup name rpc.
 634  ********************************************************************/
 635
 636 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 637 {
 638         extern DOM_SID global_sid_World_Domain;
 639         struct passwd *pass = NULL;
 640         DOM_SID local_sid;
 641         fstring user;
 642         SAM_ACCOUNT *sam_account = NULL;
 643         BOOL found = False;
 644
 645         *psid_name_use = SID_NAME_UNKNOWN;
 646
 647         /*
 648          * user may be quoted a const string, and map_username and
 649          * friends can modify it. Make a modifiable copy. JRA.
 650          */
 651
 652         fstrcpy(user, c_user);
 653
 654         sid_copy(&local_sid, &global_sam_sid);
 655
 656         /*
 657          * Special case for MACHINE\Everyone. Map to the world_sid.
 658          */
 659
 660         if(strequal(user, "Everyone")) {
 661                 sid_copy( psid, &global_sid_World_Domain);
 662                 sid_append_rid(psid, 0);
 663                 *psid_name_use = SID_NAME_ALIAS;
 664                 return True;
 665         }
 666
 667         /*
 668          * Don't lookup local unix users if running in appliance mode
 669          */
 670         if (lp_hide_local_users())
 671                 return False;
 672
 673         (void)map_username(user);
 674
 675         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 676                 return False;
 677         }
 678
 679         if (pdb_getsampwnam(sam_account, user)) {
 680                 sid_append_rid( &local_sid, pdb_get_user_rid(sam_account));
 681                 *psid_name_use = SID_NAME_USER;
 682
 683                 sid_copy( psid, &local_sid);
 684                 found = True;
 685         }
 686
 687         pdb_free_sam(&sam_account);
 688
 689         if (!found && (pass = Get_Pwnam(user))) {
 690                 sid_append_rid( &local_sid, fallback_pdb_uid_to_user_rid(pass->pw_uid));
 691                 *psid_name_use = SID_NAME_USER;
 692                 pdb_free_sam(&sam_account);
 693
 694         } else if (!found) {
 695                 /*
 696                  * Maybe it was a group ?
 697                  */
 698                 struct group *grp;
 699                 GROUP_MAP map;
 700
 701                 pdb_free_sam(&sam_account);
 702
 703                 /* check if it's a mapped group */
 704                 if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 705                         if (map.gid!=-1) {
 706                                 /* yes it's a mapped group to a valid unix group */
 707                                 sid_copy(&local_sid, &map.sid);
 708                                 *psid_name_use = map.sid_name_use;
 709                         }
 710                         else
 711                                 /* it's a correct name but not mapped so it points to nothing*/
 712                                 return False;
 713                 } else {
 714                         /* it's not a mapped group */
 715                         grp = getgrnam(user);
 716                         if(!grp)
 717                                 return False;
 718
 719                         /*
 720                          *check if it's mapped, if it is reply it doesn't exist
 721                          *
 722                          * that's to prevent this case:
 723                          *
 724                          * unix group ug is mapped to nt group ng
 725                          * someone does a lookup on ug
 726                          * we must not reply as it doesn't "exist" anymore
 727                          * for NT. For NT only ng exists.
 728                          * JFM, 30/11/2001
 729                          */
 730
 731                         if(get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 732                                 return False;
 733                         }
 734
 735                         sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 736                         *psid_name_use = SID_NAME_ALIAS;
 737                 }
 738         }
 739
 740         sid_copy( psid, &local_sid);
 741
 742         return True;
 743 }
 744
 745 /****************************************************************************
 746  Convert a uid to SID - locally.
 747 ****************************************************************************/
 748
 749 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 750 {
 751         extern DOM_SID global_sam_sid;
 752         struct passwd *pass;
 753         SAM_ACCOUNT *sam_user = NULL;
 754
 755         sid_copy(psid, &global_sam_sid);
 756
 757         if(!(pass = getpwuid_alloc(uid)))
 758                 return NULL;
 759
 760         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 761                 return NULL;
 762
 763         if (!pdb_getsampwnam(sam_user, pass->pw_name)) {
 764                 pdb_free_sam(&sam_user);
 765                 return NULL;
 766         }
 767
 768         passwd_free(&pass);
 769
 770         sid_append_rid(psid, pdb_get_user_rid(sam_user));
 771
 772         pdb_free_sam(&sam_user);
 773
 774         return psid;
 775 }
 776
 777 /****************************************************************************
 778  Convert a SID to uid - locally.
 779 ****************************************************************************/
 780
 781 BOOL local_sid_to_uid(uid_t *puid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 782 {
 783         extern DOM_SID global_sam_sid;
 784
 785         DOM_SID dom_sid;
 786         uint32 rid;
 787         fstring str;
 788         struct passwd *pass;
 789         SAM_ACCOUNT *sam_user = NULL;
 790
 791         *name_type = SID_NAME_UNKNOWN;
 792
 793         sid_copy(&dom_sid, psid);
 794         sid_split_rid(&dom_sid, &rid);
 795
 796         if (!pdb_rid_is_user(rid))
 797                 return False;
 798
 799         /*
 800          * We can only convert to a uid if this is our local
 801          * Domain SID (ie. we are the controling authority).
 802          */
 803         if (!sid_equal(&global_sam_sid, &dom_sid))
 804                 return False;
 805
 806         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 807                 return False;
 808
 809         if (!pdb_getsampwrid(sam_user, rid)) {
 810                 pdb_free_sam(&sam_user);
 811                 return False;
 812         }
 813
 814         *puid = pdb_get_uid(sam_user);
 815         if (*puid == -1)
 816                 return False;
 817
 818         pdb_free_sam(&sam_user);
 819
 820         /*
 821          * Ensure this uid really does exist.
 822          */
 823         if(!(pass = getpwuid_alloc(*puid)))
 824                 return False;
 825
 826         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 827                 (unsigned int)*puid, pass->pw_name ));
 828
 829         passwd_free(&pass);
 830
 831         *name_type = SID_NAME_USER;
 832
 833         return True;
 834 }
 835
 836 /****************************************************************************
 837  Convert a gid to SID - locally.
 838 ****************************************************************************/
 839
 840 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 841 {
 842         extern DOM_SID global_sam_sid;
 843         GROUP_MAP map;
 844
 845         sid_copy(psid, &global_sam_sid);
 846
 847         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 848                 sid_copy(psid, &map.sid);
 849         }
 850         else {
 851                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 852         }
 853
 854         return psid;
 855 }
 856
 857 /****************************************************************************
 858  Convert a SID to gid - locally.
 859 ****************************************************************************/
 860
 861 BOOL local_sid_to_gid(gid_t *pgid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 862 {
 863         extern DOM_SID global_sam_sid;
 864         DOM_SID dom_sid;
 865         uint32 rid;
 866         fstring str;
 867         struct group *grp;
 868         GROUP_MAP map;
 869
 870         *name_type = SID_NAME_UNKNOWN;
 871
 872         sid_copy(&dom_sid, psid);
 873         sid_split_rid(&dom_sid, &rid);
 874
 875         /*
 876          * We can only convert to a gid if this is our local
 877          * Domain SID (ie. we are the controling authority).
 878          *
 879          * Or in the Builtin SID too. JFM, 11/30/2001
 880          */
 881
 882         if (!sid_equal(&global_sam_sid, &dom_sid))
 883                 return False;
 884
 885         if (pdb_rid_is_user(rid))
 886                 return False;
 887
 888         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 889
 890                 /* the SID is in the mapping table but not mapped */
 891                 if (map.gid==-1)
 892                         return False;
 893
 894                 sid_peek_rid(&map.sid, &rid);
 895                 *pgid = rid;
 896                 *name_type = map.sid_name_use;
 897         } else {
 898                 *pgid = pdb_group_rid_to_gid(rid);
 899                 *name_type = SID_NAME_ALIAS;
 900         }
 901
 902         /*
 903          * Ensure this gid really does exist.
 904          */
 905
 906         if(!(grp = getgrgid(*pgid)))
 907                 return False;
 908
 909         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u) (%s).\n", sid_to_string( str, psid),
 910                 (unsigned int)*pgid, grp->gr_name ));
 911
 912         return True;
 913 }
 914
 915 /**
 916  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 917  * @return static buffer containing the converted string
 918  **/
 919
 920 static char *pdb_convert(const UNISTR2 *from)
 921 {
 922         static pstring convert_buffer;
 923         *convert_buffer = 0;
 924         if (!from) {
 925                 return convert_buffer;
 926         }
 927
 928         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 929         return convert_buffer;
 930 }
 931
 932 /*************************************************************
 933  Copies a SAM_USER_INFO_23 to a SAM_ACCOUNT
 934  **************************************************************/
 935
 936 void copy_id23_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_23 *from)
 937 {
 938
 939         if (from == NULL || to == NULL)
 940                 return;
 941
 942         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time), True);
 943         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time), True);
 944         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time), True);
 945         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time), True);
 946         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time), True);
 947
 948         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
 949
 950         if (from->uni_user_name.buffer)
 951                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
 952         if (from->uni_full_name.buffer)
 953                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
 954         if (from->uni_home_dir.buffer)
 955                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
 956         if (from->uni_dir_drive.buffer)
 957                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
 958         if (from->uni_logon_script.buffer)
 959                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
 960         if (from->uni_profile_path.buffer)
 961                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
 962         if (from->uni_acct_desc.buffer)
 963                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
 964         if (from->uni_workstations.buffer)
 965                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
 966         if (from->uni_unknown_str.buffer)
 967                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
 968         if (from->uni_munged_dial.buffer)
 969                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
 970
 971         if (from->user_rid)
 972                 pdb_set_user_rid(to, from->user_rid);
 973         if (from->group_rid)
 974                 pdb_set_group_rid(to, from->group_rid);
 975
 976         pdb_set_acct_ctrl(to, from->acb_info);
 977         pdb_set_unknown_3(to, from->unknown_3);
 978
 979         pdb_set_logon_divs(to, from->logon_divs);
 980         pdb_set_hours_len(to, from->logon_hrs.len);
 981         pdb_set_hours(to, from->logon_hrs.hours);
 982
 983         pdb_set_unknown_5(to, from->unknown_5);
 984         pdb_set_unknown_6(to, from->unknown_6);
 985 }
 986
 987
 988 /*************************************************************
 989  Copies a sam passwd.
 990  **************************************************************/
 991
 992 void copy_id21_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_21 *from)
 993 {
 994         if (from == NULL || to == NULL)
 995                 return;
 996
 997         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time), True);
 998         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time), True);
 999         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time), True);
1000         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time), True);
1001         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time), True);
1002
1003         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
1004
1005         if (from->uni_user_name.buffer)
1006                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
1007         if (from->uni_full_name.buffer)
1008                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
1009         if (from->uni_home_dir.buffer)
1010                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
1011         if (from->uni_dir_drive.buffer)
1012                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
1013         if (from->uni_logon_script.buffer)
1014                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
1015         if (from->uni_profile_path.buffer)
1016                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
1017         if (from->uni_acct_desc.buffer)
1018                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
1019         if (from->uni_workstations.buffer)
1020                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
1021         if (from->uni_unknown_str.buffer)
1022                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
1023         if (from->uni_munged_dial.buffer)
1024                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
1025
1026         if (from->user_rid)
1027                 pdb_set_user_rid(to, from->user_rid);
1028         if (from->group_rid)
1029                 pdb_set_group_rid(to, from->group_rid);
1030
1031         /* FIXME!!  Do we need to copy the passwords here as well?
1032            I don't know.  Need to figure this out   --jerry */
1033
1034         /* Passwords dealt with in caller --abartlet */
1035
1036         pdb_set_acct_ctrl(to, from->acb_info);
1037         pdb_set_unknown_3(to, from->unknown_3);
1038
1039         pdb_set_logon_divs(to, from->logon_divs);
1040         pdb_set_hours_len(to, from->logon_hrs.len);
1041         pdb_set_hours(to, from->logon_hrs.hours);
1042
1043         pdb_set_unknown_5(to, from->unknown_5);
1044         pdb_set_unknown_6(to, from->unknown_6);
1045 }
1046
1047
1048 /*************************************************************
1049  Change a password entry in the local smbpasswd file.
1050
1051  FIXME!!  The function needs to be abstracted into the
1052  passdb interface or something.  It is currently being called
1053  by _api_samr_create_user() in rpc_server/srv_samr.c,
1054  in SWAT and by smbpasswd/pdbedit.
1055
1056  --jerry
1057  *************************************************************/
1058
1059 BOOL local_password_change(const char *user_name, int local_flags,
1060                            const char *new_passwd,
1061                            char *err_str, size_t err_str_len,
1062                            char *msg_str, size_t msg_str_len)
1063 {
1064         struct passwd  *pwd = NULL;
1065         SAM_ACCOUNT     *sam_pass=NULL;
1066
1067         *err_str = '\0';
1068         *msg_str = '\0';
1069
1070         /* Get the smb passwd entry for this user */
1071         pdb_init_sam(&sam_pass);
1072         if(!pdb_getsampwnam(sam_pass, user_name)) {
1073                 pdb_free_sam(&sam_pass);
1074
1075                 if (local_flags & LOCAL_ADD_USER) {
1076                         pwd = getpwnam_alloc(user_name);
1077                 } else if (local_flags & LOCAL_DELETE_USER) {
1078                         /* Might not exist in /etc/passwd */
1079                 } else {
1080                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1081                         return False;
1082                 }
1083
1084                 if (pwd) {
1085                         /* Local user found, so init from this */
1086                         if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1087                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1088                                 passwd_free(&pwd);
1089                                 return False;
1090                         }
1091
1092                         passwd_free(&pwd);
1093                 } else {
1094                         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_pass))){
1095                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1096                                 return False;
1097                         }
1098
1099                         if (!pdb_set_username(sam_pass, user_name)) {
1100                                 slprintf(err_str, err_str_len - 1, "Failed to set username for user %s.\n", user_name);
1101                                 pdb_free_sam(&sam_pass);
1102                                 return False;
1103                         }
1104                 }
1105                 if (local_flags & LOCAL_TRUST_ACCOUNT) {
1106                         if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST)) {
1107                                 slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1108                                 pdb_free_sam(&sam_pass);
1109                                 return False;
1110                         }
1111                 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1112                         if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST)) {
1113                                 slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1114                                 pdb_free_sam(&sam_pass);
1115                                 return False;
1116                         }
1117                 } else {
1118                         if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL)) {
1119                                 slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1120                                 pdb_free_sam(&sam_pass);
1121                                 return False;
1122                         }
1123                 }
1124
1125         } else {
1126                 /* the entry already existed */
1127                 local_flags &= ~LOCAL_ADD_USER;
1128         }
1129
1130         /*
1131          * We are root - just write the new password
1132          * and the valid last change time.
1133          */
1134
1135         if (local_flags & LOCAL_DISABLE_USER) {
1136                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED)) {
1137                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1138                         pdb_free_sam(&sam_pass);
1139                         return False;
1140                 }
1141         } else if (local_flags & LOCAL_ENABLE_USER) {
1142                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1143                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1144                         pdb_free_sam(&sam_pass);
1145                         return False;
1146                 }
1147         }
1148
1149         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1150                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ)) {
1151                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1152                         pdb_free_sam(&sam_pass);
1153                         return False;
1154                 }
1155         } else if (local_flags & LOCAL_SET_PASSWORD) {
1156                 /*
1157                  * If we're dealing with setting a completely empty user account
1158                  * ie. One with a password of 'XXXX', but not set disabled (like
1159                  * an account created from scratch) then if the old password was
1160                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1161                  * We remove that as we're giving this user their first password
1162                  * and the decision hasn't really been made to disable them (ie.
1163                  * don't create them disabled). JRA.
1164                  */
1165                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1166                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1167                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1168                                 pdb_free_sam(&sam_pass);
1169                                 return False;
1170                         }
1171                 }
1172                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ))) {
1173                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1174                         pdb_free_sam(&sam_pass);
1175                         return False;
1176                 }
1177
1178                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1179                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1180                         pdb_free_sam(&sam_pass);
1181                         return False;
1182                 }
1183         }
1184
1185         if (local_flags & LOCAL_ADD_USER) {
1186                 if (pdb_add_sam_account(sam_pass)) {
1187                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1188                         pdb_free_sam(&sam_pass);
1189                         return True;
1190                 } else {
1191                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1192                         pdb_free_sam(&sam_pass);
1193                         return False;
1194                 }
1195         } else if (local_flags & LOCAL_DELETE_USER) {
1196                 if (!pdb_delete_sam_account(sam_pass)) {
1197                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1198                         pdb_free_sam(&sam_pass);
1199                         return False;
1200                 }
1201                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1202         } else {
1203                 if(!pdb_update_sam_account(sam_pass)) {
1204                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1205                         pdb_free_sam(&sam_pass);
1206                         return False;
1207                 }
1208                 if(local_flags & LOCAL_DISABLE_USER)
1209                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1210                 else if (local_flags & LOCAL_ENABLE_USER)
1211                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1212                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1213                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1214         }
1215
1216         pdb_free_sam(&sam_pass);
1217         return True;
1218 }