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