source/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         /* Some parts of samba strlen their pdb_get...() returns,
  85            so this keeps the interface unchanged for now. */
  86
  87         user->private.username = "";
  88         user->private.domain = "";
  89         user->private.nt_username = "";
  90         user->private.full_name = "";
  91         user->private.home_dir = "";
  92         user->private.logon_script = "";
  93         user->private.profile_path = "";
  94         user->private.acct_desc = "";
  95         user->private.workstations = "";
  96         user->private.unknown_str = "";
  97         user->private.munged_dial = "";
  98 }
  99
 100 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
 101 {
 102         if (*user) {
 103                 talloc_destroy((*user)->mem_ctx);
 104                 *user = NULL;
 105         }
 106 }
 107
 108
 109 /**********************************************************************
 110  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
 111 ***********************************************************************/
 112
 113 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
 114 {
 115         if (*user != NULL) {
 116                 DEBUG(0,("pdb_init_sam: SAM_ACCOUNT was non NULL\n"));
 117 #if 0
 118                 smb_panic("NULL pointer passed to pdb_init_sam\n");
 119 #endif
 120                 return NT_STATUS_UNSUCCESSFUL;
 121         }
 122
 123         if (!mem_ctx) {
 124                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 125                 return NT_STATUS_UNSUCCESSFUL;
 126         }
 127
 128         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 129
 130         if (*user==NULL) {
 131                 DEBUG(0,("pdb_init_sam: error while allocating memory\n"));
 132                 return NT_STATUS_NO_MEMORY;
 133         }
 134
 135         (*user)->mem_ctx = mem_ctx;
 136
 137         (*user)->free_fn = NULL;
 138
 139         pdb_fill_default_sam(*user);
 140
 141         return NT_STATUS_OK;
 142 }
 143
 144
 145 /*************************************************************
 146  Alloc memory and initialises a struct sam_passwd.
 147  ************************************************************/
 148
 149 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 150 {
 151         TALLOC_CTX *mem_ctx;
 152         NTSTATUS nt_status;
 153
 154         mem_ctx = talloc_init_named("passdb internal SAM_ACCOUNT allocation");
 155
 156         if (!mem_ctx) {
 157                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 158                 return NT_STATUS_NO_MEMORY;
 159         }
 160
 161         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 162                 talloc_destroy(mem_ctx);
 163                 return nt_status;
 164         }
 165
 166         (*user)->free_fn = destroy_pdb_talloc;
 167
 168         return NT_STATUS_OK;
 169 }
 170
 171
 172 /*************************************************************
 173  Initialises a struct sam_passwd with sane values.
 174  ************************************************************/
 175
 176 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 177 {
 178         pstring str;
 179         GROUP_MAP map;
 180         uint32 rid;
 181         NTSTATUS nt_status;
 182
 183         if (!pwd) {
 184                 new_sam_acct = NULL;
 185                 return NT_STATUS_UNSUCCESSFUL;
 186         }
 187
 188         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 189                 new_sam_acct = NULL;
 190                 return nt_status;
 191         }
 192
 193         pdb_set_username(*new_sam_acct, pwd->pw_name);
 194         pdb_set_fullname(*new_sam_acct, pwd->pw_gecos);
 195
 196         pdb_set_uid(*new_sam_acct, pwd->pw_uid);
 197         pdb_set_gid(*new_sam_acct, pwd->pw_gid);
 198
 199         pdb_set_user_rid(*new_sam_acct, pdb_uid_to_user_rid(pwd->pw_uid));
 200
 201         /* call the mapping code here */
 202         if(get_group_map_from_gid(pwd->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 203                 sid_peek_rid(&map.sid, &rid);
 204         }
 205         else {
 206                 rid=pdb_gid_to_group_rid(pwd->pw_gid);
 207         }
 208
 209         pdb_set_group_rid(*new_sam_acct, rid);
 210
 211         pstrcpy(str, lp_logon_path());
 212         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 213         pdb_set_profile_path(*new_sam_acct, str, False);
 214
 215         pstrcpy(str, lp_logon_home());
 216         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 217         pdb_set_homedir(*new_sam_acct, str, False);
 218
 219         pstrcpy(str, lp_logon_drive());
 220         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 221         pdb_set_dir_drive(*new_sam_acct, str, False);
 222
 223         pstrcpy(str, lp_logon_script());
 224         standard_sub_advanced(-1, pwd->pw_name, "", pwd->pw_gid, pwd->pw_name, str);
 225         pdb_set_logon_script(*new_sam_acct, str, False);
 226
 227         return NT_STATUS_OK;
 228 }
 229
 230
 231 /**
 232  * Free the contets of the SAM_ACCOUNT, but not the structure.
 233  *
 234  * Also wipes the LM and NT hashes from memory.
 235  *
 236  * @param user SAM_ACCOUNT to free members of.
 237  **/
 238
 239 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 240 {
 241         /* As we start mallocing more strings this is where
 242            we should free them. */
 243
 244         data_blob_clear_free(&(user->private.lm_pw));
 245         data_blob_clear_free(&(user->private.nt_pw));
 246 }
 247
 248
 249 /************************************************************
 250  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 251  ***********************************************************/
 252
 253 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 254 {
 255         if (user == NULL) {
 256                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 257 #if 0
 258                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 259 #endif
 260                 return NT_STATUS_UNSUCCESSFUL;
 261         }
 262
 263         pdb_free_sam_contents(user);
 264
 265         pdb_fill_default_sam(user);
 266
 267         return NT_STATUS_OK;
 268 }
 269
 270
 271 /************************************************************
 272  Free the SAM_ACCOUNT and the member pointers.
 273  ***********************************************************/
 274
 275 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 276 {
 277         if (*user == NULL) {
 278                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 279 #if 0
 280                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 281 #endif
 282                 return NT_STATUS_UNSUCCESSFUL;
 283         }
 284
 285         pdb_free_sam_contents(*user);
 286
 287         if ((*user)->free_fn) {
 288                 (*user)->free_fn(user);
 289         }
 290
 291         return NT_STATUS_OK;
 292 }
 293
 294
 295 /**********************************************************
 296  Encode the account control bits into a string.
 297  length = length of string to encode into (including terminating
 298  null). length *MUST BE MORE THAN 2* !
 299  **********************************************************/
 300
 301 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 302 {
 303         static fstring acct_str;
 304         size_t i = 0;
 305
 306         acct_str[i++] = '[';
 307
 308         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 309         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 310         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 311         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 312         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 313         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 314         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 315         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 316         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 317         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 318         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 319
 320         for ( ; i < length - 2 ; i++ )
 321                 acct_str[i] = ' ';
 322
 323         i = length - 2;
 324         acct_str[i++] = ']';
 325         acct_str[i++] = '\0';
 326
 327         return acct_str;
 328 }
 329
 330 /**********************************************************
 331  Decode the account control bits from a string.
 332  **********************************************************/
 333
 334 uint16 pdb_decode_acct_ctrl(const char *p)
 335 {
 336         uint16 acct_ctrl = 0;
 337         BOOL finished = False;
 338
 339         /*
 340          * Check if the account type bits have been encoded after the
 341          * NT password (in the form [NDHTUWSLXI]).
 342          */
 343
 344         if (*p != '[')
 345                 return 0;
 346
 347         for (p++; *p && !finished; p++) {
 348                 switch (*p) {
 349                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 350                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 351                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 352                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 353                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 354                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 355                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 356                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 357                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 358                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 359                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 360             case ' ': { break; }
 361                         case ':':
 362                         case '\n':
 363                         case '\0':
 364                         case ']':
 365                         default:  { finished = True; }
 366                 }
 367         }
 368
 369         return acct_ctrl;
 370 }
 371
 372 /*************************************************************
 373  Routine to set 32 hex password characters from a 16 byte array.
 374 **************************************************************/
 375
 376 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 377 {
 378         if (pwd != NULL) {
 379                 int i;
 380                 for (i = 0; i < 16; i++)
 381                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 382         } else {
 383                 if (acct_ctrl & ACB_PWNOTREQ)
 384                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 385                 else
 386                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 387         }
 388 }
 389
 390 /*************************************************************
 391  Routine to get the 32 hex characters and turn them
 392  into a 16 byte array.
 393 **************************************************************/
 394
 395 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 396 {
 397         int i;
 398         unsigned char   lonybble, hinybble;
 399         char           *hexchars = "0123456789ABCDEF";
 400         char           *p1, *p2;
 401
 402         if (!p)
 403                 return (False);
 404
 405         for (i = 0; i < 32; i += 2) {
 406                 hinybble = toupper(p[i]);
 407                 lonybble = toupper(p[i + 1]);
 408
 409                 p1 = strchr(hexchars, hinybble);
 410                 p2 = strchr(hexchars, lonybble);
 411
 412                 if (!p1 || !p2)
 413                         return (False);
 414
 415                 hinybble = PTR_DIFF(p1, hexchars);
 416                 lonybble = PTR_DIFF(p2, hexchars);
 417
 418                 pwd[i / 2] = (hinybble << 4) | lonybble;
 419         }
 420         return (True);
 421 }
 422
 423 /*******************************************************************
 424  Group and User RID username mapping function
 425  ********************************************************************/
 426
 427 BOOL pdb_name_to_rid(const char *user_name, uint32 *u_rid, uint32 *g_rid)
 428 {
 429         GROUP_MAP map;
 430         struct passwd *pw = Get_Pwnam(user_name);
 431
 432         if (u_rid == NULL || g_rid == NULL || user_name == NULL)
 433                 return False;
 434
 435         if (!pw) {
 436                 DEBUG(1,("Username %s is invalid on this system\n", user_name));
 437                 return False;
 438         }
 439
 440         /* turn the unix UID into a Domain RID.  this is what the posix
 441            sub-system does (adds 1000 to the uid) */
 442         *u_rid = pdb_uid_to_user_rid(pw->pw_uid);
 443
 444         /* absolutely no idea what to do about the unix GID to Domain RID mapping */
 445         /* map it ! */
 446         if (get_group_map_from_gid(pw->pw_gid, &map, MAPPING_WITHOUT_PRIV)) {
 447                 sid_peek_rid(&map.sid, g_rid);
 448         } else
 449                 *g_rid = pdb_gid_to_group_rid(pw->pw_gid);
 450
 451         return True;
 452 }
 453
 454 /*******************************************************************
 455  Converts NT user RID to a UNIX uid.
 456  ********************************************************************/
 457
 458 uid_t pdb_user_rid_to_uid(uint32 user_rid)
 459 {
 460         return (uid_t)(((user_rid & (~USER_RID_TYPE))- 1000)/RID_MULTIPLIER);
 461 }
 462
 463
 464 /*******************************************************************
 465  Converts NT group RID to a UNIX gid.
 466  ********************************************************************/
 467
 468 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 469 {
 470         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- 1000)/RID_MULTIPLIER);
 471 }
 472
 473 /*******************************************************************
 474  converts UNIX uid to an NT User RID.
 475  ********************************************************************/
 476
 477 uint32 pdb_uid_to_user_rid(uid_t uid)
 478 {
 479         return (((((uint32)uid)*RID_MULTIPLIER) + 1000) | USER_RID_TYPE);
 480 }
 481
 482 /*******************************************************************
 483  converts NT Group RID to a UNIX uid.
 484
 485  warning: you must not call that function only
 486  you must do a call to the group mapping first.
 487  there is not anymore a direct link between the gid and the rid.
 488  ********************************************************************/
 489
 490 uint32 pdb_gid_to_group_rid(gid_t gid)
 491 {
 492   return (((((uint32)gid)*RID_MULTIPLIER) + 1000) | GROUP_RID_TYPE);
 493 }
 494
 495 /*******************************************************************
 496  Decides if a RID is a well known RID.
 497  ********************************************************************/
 498
 499 static BOOL pdb_rid_is_well_known(uint32 rid)
 500 {
 501   return (rid < 1000);
 502 }
 503
 504 /*******************************************************************
 505  Decides if a RID is a user or group RID.
 506  ********************************************************************/
 507
 508 BOOL pdb_rid_is_user(uint32 rid)
 509 {
 510   /* lkcl i understand that NT attaches an enumeration to a RID
 511    * such that it can be identified as either a user, group etc
 512    * type.  there are 5 such categories, and they are documented.
 513    */
 514    if(pdb_rid_is_well_known(rid)) {
 515       /*
 516        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 517        * and DOMAIN_USER_RID_GUEST.
 518        */
 519      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 520        return True;
 521    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 522      return True;
 523    }
 524    return False;
 525 }
 526
 527 /*******************************************************************
 528  Convert a rid into a name. Used in the lookup SID rpc.
 529  ********************************************************************/
 530
 531 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 532 {
 533         uint32 rid;
 534         BOOL is_user;
 535
 536         sid_peek_rid(sid, &rid);
 537         is_user = pdb_rid_is_user(rid);
 538         *psid_name_use = SID_NAME_UNKNOWN;
 539
 540         DEBUG(5,("local_lookup_sid: looking up %s RID %u.\n", is_user ? "user" :
 541                         "group", (unsigned int)rid));
 542
 543         if(is_user) {
 544                 if(rid == DOMAIN_USER_RID_ADMIN) {
 545                         pstring admin_users;
 546                         char *p = admin_users;
 547                         *psid_name_use = SID_NAME_USER;
 548                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 549                                 fstrcpy(name, "Administrator");
 550                 } else if (rid == DOMAIN_USER_RID_GUEST) {
 551                         pstring guest_users;
 552                         char *p = guest_users;
 553                         *psid_name_use = SID_NAME_USER;
 554                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 555                                 fstrcpy(name, "Guest");
 556                 } else {
 557                         uid_t uid;
 558                         struct passwd *pass;
 559
 560                         /*
 561                          * Don't try to convert the rid to a name if
 562                          * running in appliance mode
 563                          */
 564                         if (lp_hide_local_users())
 565                                 return False;
 566
 567                         uid = pdb_user_rid_to_uid(rid);
 568                         pass = sys_getpwuid(uid);
 569
 570                         *psid_name_use = SID_NAME_USER;
 571
 572                         DEBUG(5,("local_lookup_sid: looking up uid %u %s\n", (unsigned int)uid,
 573                                 pass ? "succeeded" : "failed" ));
 574
 575                         if(!pass) {
 576                                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 577                                 return True;
 578                         }
 579
 580                         fstrcpy(name, pass->pw_name);
 581
 582                         DEBUG(5,("local_lookup_sid: found user %s for rid %u\n", name,
 583                                 (unsigned int)rid ));
 584                 }
 585
 586         } else {
 587                 gid_t gid;
 588                 struct group *gr;
 589                 GROUP_MAP map;
 590
 591                 /*
 592                  * Don't try to convert the rid to a name if running
 593                  * in appliance mode
 594                  */
 595
 596                 if (lp_hide_local_users())
 597                         return False;
 598
 599                 /* check if it's a mapped group */
 600                 if (get_group_map_from_sid(*sid, &map, MAPPING_WITHOUT_PRIV)) {
 601                         if (map.gid!=-1) {
 602                                 DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 603                                 fstrcpy(name, map.nt_name);
 604                                 *psid_name_use = map.sid_name_use;
 605                                 return True;
 606                         }
 607                 }
 608
 609                 gid = pdb_group_rid_to_gid(rid);
 610                 gr = getgrgid(gid);
 611
 612                 *psid_name_use = SID_NAME_ALIAS;
 613
 614                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 615                         gr ? "succeeded" : "failed" ));
 616
 617                 if(!gr) {
 618                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 619                         return False;
 620                 }
 621
 622                 fstrcpy( name, gr->gr_name);
 623
 624                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 625                         (unsigned int)rid ));
 626         }
 627
 628         return True;
 629 }
 630
 631 /*******************************************************************
 632  Convert a name into a SID. Used in the lookup name rpc.
 633  ********************************************************************/
 634
 635 BOOL local_lookup_name(const char *c_domain, const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 636 {
 637         extern DOM_SID global_sid_World_Domain;
 638         struct passwd *pass = NULL;
 639         DOM_SID local_sid;
 640         fstring user;
 641         fstring domain;
 642
 643         *psid_name_use = SID_NAME_UNKNOWN;
 644
 645         /*
 646          * domain and user may be quoted const strings, and map_username and
 647          * friends can modify them. Make a modifiable copy. JRA.
 648          */
 649
 650         fstrcpy(domain, c_domain);
 651         fstrcpy(user, c_user);
 652
 653         sid_copy(&local_sid, &global_sam_sid);
 654
 655         /*
 656          * Special case for MACHINE\Everyone. Map to the world_sid.
 657          */
 658
 659         if(strequal(user, "Everyone")) {
 660                 sid_copy( psid, &global_sid_World_Domain);
 661                 sid_append_rid(psid, 0);
 662                 *psid_name_use = SID_NAME_ALIAS;
 663                 return True;
 664         }
 665
 666         /*
 667          * Don't lookup local unix users if running in appliance mode
 668          */
 669         if (lp_hide_local_users())
 670                 return False;
 671
 672         (void)map_username(user);
 673
 674         if((pass = Get_Pwnam(user))) {
 675                 sid_append_rid( &local_sid, pdb_uid_to_user_rid(pass->pw_uid));
 676                 *psid_name_use = SID_NAME_USER;
 677         } else {
 678                 /*
 679                  * Maybe it was a group ?
 680                  */
 681                 struct group *grp;
 682                 GROUP_MAP map;
 683
 684                 /* check if it's a mapped group */
 685                 if (get_group_map_from_ntname(user, &map, MAPPING_WITHOUT_PRIV)) {
 686                         if (map.gid!=-1) {
 687                                 /* yes it's a mapped group to a valid unix group */
 688                                 sid_copy(&local_sid, &map.sid);
 689                                 *psid_name_use = map.sid_name_use;
 690                         }
 691                         else
 692                                 /* it's a correct name but not mapped so it points to nothing*/
 693                                 return False;
 694                 } else {
 695                         /* it's not a mapped group */
 696                         grp = getgrnam(user);
 697                         if(!grp)
 698                                 return False;
 699
 700                         /*
 701                          *check if it's mapped, if it is reply it doesn't exist
 702                          *
 703                          * that's to prevent this case:
 704                          *
 705                          * unix group ug is mapped to nt group ng
 706                          * someone does a lookup on ug
 707                          * we must not reply as it doesn't "exist" anymore
 708                          * for NT. For NT only ng exists.
 709                          * JFM, 30/11/2001
 710                          */
 711
 712                         if(get_group_map_from_gid(grp->gr_gid, &map, MAPPING_WITHOUT_PRIV)){
 713                                 return False;
 714                         }
 715
 716                         sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 717                         *psid_name_use = SID_NAME_ALIAS;
 718                 }
 719         }
 720
 721         sid_copy( psid, &local_sid);
 722
 723         return True;
 724 }
 725
 726 /****************************************************************************
 727  Convert a uid to SID - locally.
 728 ****************************************************************************/
 729
 730 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 731 {
 732         extern DOM_SID global_sam_sid;
 733
 734         sid_copy(psid, &global_sam_sid);
 735         sid_append_rid(psid, pdb_uid_to_user_rid(uid));
 736
 737         return psid;
 738 }
 739
 740 /****************************************************************************
 741  Convert a SID to uid - locally.
 742 ****************************************************************************/
 743
 744 BOOL local_sid_to_uid(uid_t *puid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 745 {
 746         extern DOM_SID global_sam_sid;
 747
 748         DOM_SID dom_sid;
 749         uint32 rid;
 750         fstring str;
 751         struct passwd *pass;
 752
 753         *name_type = SID_NAME_UNKNOWN;
 754
 755         sid_copy(&dom_sid, psid);
 756         sid_split_rid(&dom_sid, &rid);
 757
 758         if (!pdb_rid_is_user(rid))
 759                 return False;
 760
 761         /*
 762          * We can only convert to a uid if this is our local
 763          * Domain SID (ie. we are the controling authority).
 764          */
 765         if (!sid_equal(&global_sam_sid, &dom_sid))
 766                 return False;
 767
 768         *puid = pdb_user_rid_to_uid(rid);
 769
 770         /*
 771          * Ensure this uid really does exist.
 772          */
 773         if(!(pass = getpwuid_alloc(*puid)))
 774                 return False;
 775
 776         DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 777                 (unsigned int)*puid, pass->pw_name ));
 778
 779         passwd_free(&pass);
 780
 781         *name_type = SID_NAME_USER;
 782
 783         return True;
 784 }
 785
 786 /****************************************************************************
 787  Convert a gid to SID - locally.
 788 ****************************************************************************/
 789
 790 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 791 {
 792         extern DOM_SID global_sam_sid;
 793         GROUP_MAP map;
 794
 795         sid_copy(psid, &global_sam_sid);
 796
 797         if (get_group_map_from_gid(gid, &map, MAPPING_WITHOUT_PRIV)) {
 798                 sid_copy(psid, &map.sid);
 799         }
 800         else {
 801                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 802         }
 803
 804         return psid;
 805 }
 806
 807 /****************************************************************************
 808  Convert a SID to gid - locally.
 809 ****************************************************************************/
 810
 811 BOOL local_sid_to_gid(gid_t *pgid, DOM_SID *psid, enum SID_NAME_USE *name_type)
 812 {
 813         extern DOM_SID global_sam_sid;
 814         DOM_SID dom_sid;
 815         uint32 rid;
 816         fstring str;
 817         struct group *grp;
 818         GROUP_MAP map;
 819
 820         *name_type = SID_NAME_UNKNOWN;
 821
 822         sid_copy(&dom_sid, psid);
 823         sid_split_rid(&dom_sid, &rid);
 824
 825         /*
 826          * We can only convert to a gid if this is our local
 827          * Domain SID (ie. we are the controling authority).
 828          *
 829          * Or in the Builtin SID too. JFM, 11/30/2001
 830          */
 831
 832         if (!sid_equal(&global_sam_sid, &dom_sid))
 833                 return False;
 834
 835         if (pdb_rid_is_user(rid))
 836                 return False;
 837
 838         if (get_group_map_from_sid(*psid, &map, MAPPING_WITHOUT_PRIV)) {
 839
 840                 /* the SID is in the mapping table but not mapped */
 841                 if (map.gid==-1)
 842                         return False;
 843
 844                 sid_peek_rid(&map.sid, &rid);
 845                 *pgid = rid;
 846                 *name_type = map.sid_name_use;
 847         } else {
 848                 *pgid = pdb_group_rid_to_gid(rid);
 849                 *name_type = SID_NAME_ALIAS;
 850         }
 851
 852         /*
 853          * Ensure this gid really does exist.
 854          */
 855
 856         if(!(grp = getgrgid(*pgid)))
 857                 return False;
 858
 859         DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u) (%s).\n", sid_to_string( str, psid),
 860                 (unsigned int)*pgid, grp->gr_name ));
 861
 862         return True;
 863 }
 864
 865 /**
 866  * Quick hack to do an easy ucs2 -> mulitbyte conversion
 867  * @return static buffer containing the converted string
 868  **/
 869
 870 static char *pdb_convert(const UNISTR2 *from)
 871 {
 872         static pstring convert_buffer;
 873         *convert_buffer = 0;
 874         if (!from) {
 875                 return convert_buffer;
 876         }
 877
 878         unistr2_to_ascii(convert_buffer, from, sizeof(pstring));
 879         return convert_buffer;
 880 }
 881
 882 /*************************************************************
 883  Copies a SAM_USER_INFO_23 to a SAM_ACCOUNT
 884  **************************************************************/
 885
 886 void copy_id23_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_23 *from)
 887 {
 888
 889         if (from == NULL || to == NULL)
 890                 return;
 891
 892         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time));
 893         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time));
 894         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time));
 895         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
 896         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time));
 897         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time));
 898
 899         if (from->uni_user_name.buffer)
 900                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
 901         if (from->uni_full_name.buffer)
 902                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
 903         if (from->uni_home_dir.buffer)
 904                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
 905         if (from->uni_dir_drive.buffer)
 906                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
 907         if (from->uni_logon_script.buffer)
 908                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
 909         if (from->uni_profile_path.buffer)
 910                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
 911         if (from->uni_acct_desc.buffer)
 912                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
 913         if (from->uni_workstations.buffer)
 914                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
 915         if (from->uni_unknown_str.buffer)
 916                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
 917         if (from->uni_munged_dial.buffer)
 918                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
 919
 920         if (from->user_rid)
 921                 pdb_set_user_rid(to, from->user_rid);
 922         if (from->group_rid)
 923                 pdb_set_group_rid(to, from->group_rid);
 924
 925         pdb_set_acct_ctrl(to, from->acb_info);
 926         pdb_set_unknown_3(to, from->unknown_3);
 927
 928         pdb_set_logon_divs(to, from->logon_divs);
 929         pdb_set_hours_len(to, from->logon_hrs.len);
 930         pdb_set_hours(to, from->logon_hrs.hours);
 931
 932         pdb_set_unknown_5(to, from->unknown_5);
 933         pdb_set_unknown_6(to, from->unknown_6);
 934 }
 935
 936
 937 /*************************************************************
 938  Copies a sam passwd.
 939  **************************************************************/
 940
 941 void copy_id21_to_sam_passwd(SAM_ACCOUNT *to, SAM_USER_INFO_21 *from)
 942 {
 943         if (from == NULL || to == NULL)
 944                 return;
 945
 946         pdb_set_logon_time(to,nt_time_to_unix(&from->logon_time));
 947         pdb_set_logoff_time(to,nt_time_to_unix(&from->logoff_time));
 948         pdb_set_kickoff_time(to, nt_time_to_unix(&from->kickoff_time));
 949         pdb_set_pass_last_set_time(to, nt_time_to_unix(&from->pass_last_set_time));
 950         pdb_set_pass_can_change_time(to, nt_time_to_unix(&from->pass_can_change_time));
 951         pdb_set_pass_must_change_time(to, nt_time_to_unix(&from->pass_must_change_time));
 952
 953         if (from->uni_user_name.buffer)
 954                 pdb_set_username(to      , pdb_convert(&from->uni_user_name   ));
 955         if (from->uni_full_name.buffer)
 956                 pdb_set_fullname(to      , pdb_convert(&from->uni_full_name   ));
 957         if (from->uni_home_dir.buffer)
 958                 pdb_set_homedir(to       , pdb_convert(&from->uni_home_dir    ), True);
 959         if (from->uni_dir_drive.buffer)
 960                 pdb_set_dir_drive(to     , pdb_convert(&from->uni_dir_drive   ), True);
 961         if (from->uni_logon_script.buffer)
 962                 pdb_set_logon_script(to  , pdb_convert(&from->uni_logon_script), True);
 963         if (from->uni_profile_path.buffer)
 964                 pdb_set_profile_path(to  , pdb_convert(&from->uni_profile_path), True);
 965         if (from->uni_acct_desc.buffer)
 966                 pdb_set_acct_desc(to     , pdb_convert(&from->uni_acct_desc   ));
 967         if (from->uni_workstations.buffer)
 968                 pdb_set_workstations(to  , pdb_convert(&from->uni_workstations));
 969         if (from->uni_unknown_str.buffer)
 970                 pdb_set_unknown_str(to   , pdb_convert(&from->uni_unknown_str ));
 971         if (from->uni_munged_dial.buffer)
 972                 pdb_set_munged_dial(to   , pdb_convert(&from->uni_munged_dial ));
 973
 974         if (from->user_rid)
 975                 pdb_set_user_rid(to, from->user_rid);
 976         if (from->group_rid)
 977                 pdb_set_group_rid(to, from->group_rid);
 978
 979         /* FIXME!!  Do we need to copy the passwords here as well?
 980            I don't know.  Need to figure this out   --jerry */
 981
 982         /* Passwords dealt with in caller --abartlet */
 983
 984         pdb_set_acct_ctrl(to, from->acb_info);
 985         pdb_set_unknown_3(to, from->unknown_3);
 986
 987         pdb_set_logon_divs(to, from->logon_divs);
 988         pdb_set_hours_len(to, from->logon_hrs.len);
 989         pdb_set_hours(to, from->logon_hrs.hours);
 990
 991         pdb_set_unknown_5(to, from->unknown_5);
 992         pdb_set_unknown_6(to, from->unknown_6);
 993 }
 994
 995
 996 /*************************************************************
 997  Change a password entry in the local smbpasswd file.
 998
 999  FIXME!!  The function needs to be abstracted into the
1000  passdb interface or something.  It is currently being called
1001  by _api_samr_create_user() in rpc_server/srv_samr.c,
1002  in SWAT and by smbpasswd/pdbedit.
1003
1004  --jerry
1005  *************************************************************/
1006
1007 BOOL local_password_change(const char *user_name, int local_flags,
1008                            const char *new_passwd,
1009                            char *err_str, size_t err_str_len,
1010                            char *msg_str, size_t msg_str_len)
1011 {
1012         struct passwd  *pwd = NULL;
1013         SAM_ACCOUNT     *sam_pass=NULL;
1014
1015         *err_str = '\0';
1016         *msg_str = '\0';
1017
1018         /* Get the smb passwd entry for this user */
1019         pdb_init_sam(&sam_pass);
1020         if(!pdb_getsampwnam(sam_pass, user_name)) {
1021                 pdb_free_sam(&sam_pass);
1022
1023                 if (local_flags & LOCAL_ADD_USER) {
1024                         /*
1025                          * Check for a local account - if we're adding only.
1026                          */
1027
1028                         if(!(pwd = getpwnam_alloc(user_name))) {
1029                                 slprintf(err_str, err_str_len - 1, "User %s does not \
1030 exist in system password file (usually /etc/passwd). Cannot add \
1031 account without a valid local system user.\n", user_name);
1032                                 return False;
1033                         }
1034                 } else {
1035                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1036                         return False;
1037                 }
1038
1039                 if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sam_pass, pwd))){
1040                         slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1041                         passwd_free(&pwd);
1042                         return False;
1043                 }
1044
1045                 passwd_free(&pwd);
1046
1047                 if (local_flags & LOCAL_TRUST_ACCOUNT) {
1048                         if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST)) {
1049                                 slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1050                                 pdb_free_sam(&sam_pass);
1051                                 return False;
1052                         }
1053                 } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1054                         if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST)) {
1055                                 slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1056                                 pdb_free_sam(&sam_pass);
1057                                 return False;
1058                         }
1059                 } else {
1060                         if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL)) {
1061                                 slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1062                                 pdb_free_sam(&sam_pass);
1063                                 return False;
1064                         }
1065                 }
1066
1067         } else {
1068                 /* the entry already existed */
1069                 local_flags &= ~LOCAL_ADD_USER;
1070         }
1071
1072         /*
1073          * We are root - just write the new password
1074          * and the valid last change time.
1075          */
1076
1077         if (local_flags & LOCAL_DISABLE_USER) {
1078                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED)) {
1079                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1080                         pdb_free_sam(&sam_pass);
1081                         return False;
1082                 }
1083         } else if (local_flags & LOCAL_ENABLE_USER) {
1084                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1085                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1086                         pdb_free_sam(&sam_pass);
1087                         return False;
1088                 }
1089         }
1090
1091         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1092                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ)) {
1093                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1094                         pdb_free_sam(&sam_pass);
1095                         return False;
1096                 }
1097         } else if (local_flags & LOCAL_SET_PASSWORD) {
1098                 /*
1099                  * If we're dealing with setting a completely empty user account
1100                  * ie. One with a password of 'XXXX', but not set disabled (like
1101                  * an account created from scratch) then if the old password was
1102                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1103                  * We remove that as we're giving this user their first password
1104                  * and the decision hasn't really been made to disable them (ie.
1105                  * don't create them disabled). JRA.
1106                  */
1107                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1108                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED))) {
1109                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1110                                 pdb_free_sam(&sam_pass);
1111                                 return False;
1112                         }
1113                 }
1114                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ))) {
1115                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1116                         pdb_free_sam(&sam_pass);
1117                         return False;
1118                 }
1119
1120                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1121                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1122                         pdb_free_sam(&sam_pass);
1123                         return False;
1124                 }
1125         }
1126
1127         if (local_flags & LOCAL_ADD_USER) {
1128                 if (pdb_add_sam_account(sam_pass)) {
1129                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1130                         pdb_free_sam(&sam_pass);
1131                         return True;
1132                 } else {
1133                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1134                         pdb_free_sam(&sam_pass);
1135                         return False;
1136                 }
1137         } else if (local_flags & LOCAL_DELETE_USER) {
1138                 if (!pdb_delete_sam_account(user_name)) {
1139                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1140                         pdb_free_sam(&sam_pass);
1141                         return False;
1142                 }
1143                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1144         } else {
1145                 if(!pdb_update_sam_account(sam_pass, True)) {
1146                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1147                         pdb_free_sam(&sam_pass);
1148                         return False;
1149                 }
1150                 if(local_flags & LOCAL_DISABLE_USER)
1151                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1152                 else if (local_flags & LOCAL_ENABLE_USER)
1153                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1154                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1155                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1156         }
1157
1158         pdb_free_sam(&sam_pass);
1159         return True;
1160 }
1161
1162 /***************************************************************************
1163  Search by uid.  Wrapper around pdb_getsampwnam()
1164  **************************************************************************/
1165
1166 BOOL pdb_getsampwuid (SAM_ACCOUNT* user, uid_t uid)
1167 {
1168         struct passwd   *pw;
1169         fstring         name;
1170
1171         if (user==NULL) {
1172                 DEBUG(0,("pdb_getsampwuid: SAM_ACCOUNT is NULL.\n"));
1173                 return False;
1174         }
1175
1176         /*
1177          * Never trust the uid in the passdb.  Lookup the username first
1178          * and then lokup the user by name in the sam.
1179          */
1180
1181         if ((pw=getpwuid_alloc(uid)) == NULL)  {
1182                 DEBUG(0,("pdb_getsampwuid: getpwuid(%d) return NULL. User does not exist in Unix accounts!\n", uid));
1183                 return False;
1184         }
1185
1186         fstrcpy (name, pw->pw_name);
1187
1188         passwd_free(&pw);
1189
1190         return pdb_getsampwnam (user, name);
1191
1192 }
1193