source3/passdb/passdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Jeremy Allison                 1996-2001
   5    Copyright (C) Luke Kenneth Casson Leighton   1996-1998
   6    Copyright (C) Gerald (Jerry) Carter          2000-2001
   7    Copyright (C) Andrew Bartlett                2001-2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_PASSDB
  28
  29 /*
  30  * This is set on startup - it defines the SID for this
  31  * machine, and therefore the SAM database for which it is
  32  * responsible.
  33  */
  34
  35 /************************************************************
  36  Fill the SAM_ACCOUNT with default values.
  37  ***********************************************************/
  38
  39 static void pdb_fill_default_sam(SAM_ACCOUNT *user)
  40 {
  41         ZERO_STRUCT(user->private); /* Don't touch the talloc context */
  42
  43         /* no initial methods */
  44         user->methods = NULL;
  45
  46         /* Don't change these timestamp settings without a good reason.
  47            They are important for NT member server compatibility. */
  48
  49         user->private.uid = user->private.gid       = -1;
  50
  51         user->private.logon_time            = (time_t)0;
  52         user->private.pass_last_set_time    = (time_t)0;
  53         user->private.pass_can_change_time  = (time_t)0;
  54         user->private.logoff_time           =
  55         user->private.kickoff_time          =
  56         user->private.pass_must_change_time = get_time_t_max();
  57         user->private.unknown_3 = 0x00ffffff;   /* don't know */
  58         user->private.logon_divs = 168;         /* hours per week */
  59         user->private.hours_len = 21;           /* 21 times 8 bits = 168 */
  60         memset(user->private.hours, 0xff, user->private.hours_len); /* available at all hours */
  61         user->private.unknown_5 = 0x00000000; /* don't know */
  62         user->private.unknown_6 = 0x000004ec; /* don't know */
  63
  64         /* Some parts of samba strlen their pdb_get...() returns,
  65            so this keeps the interface unchanged for now. */
  66
  67         user->private.username = "";
  68         user->private.domain = "";
  69         user->private.nt_username = "";
  70         user->private.full_name = "";
  71         user->private.home_dir = "";
  72         user->private.logon_script = "";
  73         user->private.profile_path = "";
  74         user->private.acct_desc = "";
  75         user->private.workstations = "";
  76         user->private.unknown_str = "";
  77         user->private.munged_dial = "";
  78
  79         user->private.plaintext_pw = NULL;
  80
  81 }
  82
  83 static void destroy_pdb_talloc(SAM_ACCOUNT **user)
  84 {
  85         if (*user) {
  86                 data_blob_clear_free(&((*user)->private.lm_pw));
  87                 data_blob_clear_free(&((*user)->private.nt_pw));
  88
  89                 if((*user)->private.plaintext_pw!=NULL)
  90                         memset((*user)->private.plaintext_pw,'\0',strlen((*user)->private.plaintext_pw));
  91                 talloc_destroy((*user)->mem_ctx);
  92                 *user = NULL;
  93         }
  94 }
  95
  96
  97 /**********************************************************************
  98  Alloc memory and initialises a struct sam_passwd on supplied mem_ctx.
  99 ***********************************************************************/
 100
 101 NTSTATUS pdb_init_sam_talloc(TALLOC_CTX *mem_ctx, SAM_ACCOUNT **user)
 102 {
 103         if (*user != NULL) {
 104                 DEBUG(0,("pdb_init_sam_talloc: SAM_ACCOUNT was non NULL\n"));
 105 #if 0
 106                 smb_panic("non-NULL pointer passed to pdb_init_sam\n");
 107 #endif
 108                 return NT_STATUS_UNSUCCESSFUL;
 109         }
 110
 111         if (!mem_ctx) {
 112                 DEBUG(0,("pdb_init_sam_talloc: mem_ctx was NULL!\n"));
 113                 return NT_STATUS_UNSUCCESSFUL;
 114         }
 115
 116         *user=(SAM_ACCOUNT *)talloc(mem_ctx, sizeof(SAM_ACCOUNT));
 117
 118         if (*user==NULL) {
 119                 DEBUG(0,("pdb_init_sam_talloc: error while allocating memory\n"));
 120                 return NT_STATUS_NO_MEMORY;
 121         }
 122
 123         (*user)->mem_ctx = mem_ctx;
 124
 125         (*user)->free_fn = NULL;
 126
 127         pdb_fill_default_sam(*user);
 128
 129         return NT_STATUS_OK;
 130 }
 131
 132
 133 /*************************************************************
 134  Alloc memory and initialises a struct sam_passwd.
 135  ************************************************************/
 136
 137 NTSTATUS pdb_init_sam(SAM_ACCOUNT **user)
 138 {
 139         TALLOC_CTX *mem_ctx;
 140         NTSTATUS nt_status;
 141
 142         mem_ctx = talloc_init("passdb internal SAM_ACCOUNT allocation");
 143
 144         if (!mem_ctx) {
 145                 DEBUG(0,("pdb_init_sam: error while doing talloc_init()\n"));
 146                 return NT_STATUS_NO_MEMORY;
 147         }
 148
 149         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_talloc(mem_ctx, user))) {
 150                 talloc_destroy(mem_ctx);
 151                 return nt_status;
 152         }
 153
 154         (*user)->free_fn = destroy_pdb_talloc;
 155
 156         return NT_STATUS_OK;
 157 }
 158
 159
 160 /*************************************************************
 161  Initialises a struct sam_passwd with sane values.
 162  ************************************************************/
 163
 164 NTSTATUS pdb_fill_sam_pw(SAM_ACCOUNT *sam_account, const struct passwd *pwd)
 165 {
 166         GROUP_MAP map;
 167
 168         const char *guest_account = lp_guestaccount();
 169         if (!(guest_account && *guest_account)) {
 170                 DEBUG(1, ("NULL guest account!?!?\n"));
 171                 return NT_STATUS_UNSUCCESSFUL;
 172         }
 173
 174         if (!pwd) {
 175                 return NT_STATUS_UNSUCCESSFUL;
 176         }
 177
 178         pdb_fill_default_sam(sam_account);
 179
 180         pdb_set_username(sam_account, pwd->pw_name, PDB_SET);
 181         pdb_set_fullname(sam_account, pwd->pw_gecos, PDB_SET);
 182
 183         pdb_set_unix_homedir(sam_account, pwd->pw_dir, PDB_SET);
 184
 185         pdb_set_domain (sam_account, lp_workgroup(), PDB_DEFAULT);
 186
 187         pdb_set_uid(sam_account, pwd->pw_uid, PDB_SET);
 188         pdb_set_gid(sam_account, pwd->pw_gid, PDB_SET);
 189
 190         /* When we get a proper uid -> SID and SID -> uid allocation
 191            mechinism, we should call it here.
 192
 193            We can't just set this to 0 or allow it only to be filled
 194            in when added to the backend, becouse the user's SID
 195            may already be in security descriptors etc.
 196
 197            -- abartlet 11-May-02
 198         */
 199
 200
 201         /* Ensure this *must* be set right */
 202         if (strcmp(pwd->pw_name, guest_account) == 0) {
 203                 if (!pdb_set_user_sid_from_rid(sam_account, DOMAIN_USER_RID_GUEST, PDB_SET)) {
 204                         return NT_STATUS_UNSUCCESSFUL;
 205                 }
 206                 if (!pdb_set_group_sid_from_rid(sam_account, DOMAIN_GROUP_RID_GUESTS, PDB_SET)) {
 207                         return NT_STATUS_UNSUCCESSFUL;
 208                 }
 209         } else {
 210
 211                 if (!pdb_set_user_sid_from_rid(sam_account,
 212                                                fallback_pdb_uid_to_user_rid(pwd->pw_uid), PDB_SET)) {
 213                         DEBUG(0,("Can't set User SID from RID!\n"));
 214                         return NT_STATUS_INVALID_PARAMETER;
 215                 }
 216
 217                 /* call the mapping code here */
 218                 if(pdb_getgrgid(&map, pwd->pw_gid, MAPPING_WITHOUT_PRIV)) {
 219                         if (!pdb_set_group_sid(sam_account,&map.sid, PDB_SET)){
 220                                 DEBUG(0,("Can't set Group SID!\n"));
 221                                 return NT_STATUS_INVALID_PARAMETER;
 222                         }
 223                 }
 224                 else {
 225                         if (!pdb_set_group_sid_from_rid(sam_account,pdb_gid_to_group_rid(pwd->pw_gid), PDB_SET)) {
 226                                 DEBUG(0,("Can't set Group SID\n"));
 227                                 return NT_STATUS_INVALID_PARAMETER;
 228                         }
 229                 }
 230         }
 231
 232         /* check if this is a user account or a machine account */
 233         if (pwd->pw_name[strlen(pwd->pw_name)-1] != '$')
 234         {
 235                 pdb_set_profile_path(sam_account,
 236                                      talloc_sub_specified((sam_account)->mem_ctx,
 237                                                             lp_logon_path(),
 238                                                             pwd->pw_name, global_myname(),
 239                                                             pwd->pw_uid, pwd->pw_gid),
 240                                      PDB_DEFAULT);
 241
 242                 pdb_set_homedir(sam_account,
 243                                 talloc_sub_specified((sam_account)->mem_ctx,
 244                                                        lp_logon_home(),
 245                                                        pwd->pw_name, global_myname(),
 246                                                        pwd->pw_uid, pwd->pw_gid),
 247                                 PDB_DEFAULT);
 248
 249                 pdb_set_dir_drive(sam_account,
 250                                   talloc_sub_specified((sam_account)->mem_ctx,
 251                                                          lp_logon_drive(),
 252                                                          pwd->pw_name, global_myname(),
 253                                                          pwd->pw_uid, pwd->pw_gid),
 254                                   PDB_DEFAULT);
 255
 256                 pdb_set_logon_script(sam_account,
 257                                      talloc_sub_specified((sam_account)->mem_ctx,
 258                                                             lp_logon_script(),
 259                                                             pwd->pw_name, global_myname(),
 260                                                             pwd->pw_uid, pwd->pw_gid),
 261                                      PDB_DEFAULT);
 262                 if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT)) {
 263                         DEBUG(1, ("Failed to set 'normal account' flags for user %s.\n", pwd->pw_name));
 264                         return NT_STATUS_UNSUCCESSFUL;
 265                 }
 266         } else {
 267                 if (!pdb_set_acct_ctrl(sam_account, ACB_WSTRUST, PDB_DEFAULT)) {
 268                         DEBUG(1, ("Failed to set 'trusted workstation account' flags for user %s.\n", pwd->pw_name));
 269                         return NT_STATUS_UNSUCCESSFUL;
 270                 }
 271         }
 272         return NT_STATUS_OK;
 273 }
 274
 275
 276 /*************************************************************
 277  Initialises a struct sam_passwd with sane values.
 278  ************************************************************/
 279
 280 NTSTATUS pdb_init_sam_pw(SAM_ACCOUNT **new_sam_acct, const struct passwd *pwd)
 281 {
 282         NTSTATUS nt_status;
 283
 284         if (!pwd) {
 285                 new_sam_acct = NULL;
 286                 return NT_STATUS_INVALID_PARAMETER;
 287         }
 288
 289         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 290                 new_sam_acct = NULL;
 291                 return nt_status;
 292         }
 293
 294         if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*new_sam_acct, pwd))) {
 295                 pdb_free_sam(new_sam_acct);
 296                 new_sam_acct = NULL;
 297                 return nt_status;
 298         }
 299
 300         return NT_STATUS_OK;
 301 }
 302
 303
 304 /*************************************************************
 305  Initialises a SAM_ACCOUNT ready to add a new account, based
 306  on the unix user if possible.
 307  ************************************************************/
 308
 309 NTSTATUS pdb_init_sam_new(SAM_ACCOUNT **new_sam_acct, const char *username)
 310 {
 311         NTSTATUS nt_status = NT_STATUS_NO_MEMORY;
 312
 313         struct passwd *pwd;
 314
 315         pwd = Get_Pwnam(username);
 316
 317         if (pwd) {
 318                 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(new_sam_acct, pwd))) {
 319                         *new_sam_acct = NULL;
 320                         return nt_status;
 321                 }
 322         } else {
 323                 if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(new_sam_acct))) {
 324                         *new_sam_acct = NULL;
 325                         return nt_status;
 326                 }
 327                 if (!pdb_set_username(*new_sam_acct, username, PDB_SET)) {
 328                         pdb_free_sam(new_sam_acct);
 329                         return nt_status;
 330                 }
 331         }
 332         return NT_STATUS_OK;
 333 }
 334
 335
 336 /**
 337  * Free the contets of the SAM_ACCOUNT, but not the structure.
 338  *
 339  * Also wipes the LM and NT hashes and plaintext password from
 340  * memory.
 341  *
 342  * @param user SAM_ACCOUNT to free members of.
 343  **/
 344
 345 static void pdb_free_sam_contents(SAM_ACCOUNT *user)
 346 {
 347
 348         /* Kill off sensitive data.  Free()ed by the
 349            talloc mechinism */
 350
 351         data_blob_clear_free(&(user->private.lm_pw));
 352         data_blob_clear_free(&(user->private.nt_pw));
 353         if (user->private.plaintext_pw!=NULL)
 354                 memset(user->private.plaintext_pw,'\0',strlen(user->private.plaintext_pw));
 355 }
 356
 357
 358 /************************************************************
 359  Reset the SAM_ACCOUNT and free the NT/LM hashes.
 360  ***********************************************************/
 361
 362 NTSTATUS pdb_reset_sam(SAM_ACCOUNT *user)
 363 {
 364         if (user == NULL) {
 365                 DEBUG(0,("pdb_reset_sam: SAM_ACCOUNT was NULL\n"));
 366 #if 0
 367                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 368 #endif
 369                 return NT_STATUS_UNSUCCESSFUL;
 370         }
 371
 372         pdb_free_sam_contents(user);
 373
 374         pdb_fill_default_sam(user);
 375
 376         return NT_STATUS_OK;
 377 }
 378
 379
 380 /************************************************************
 381  Free the SAM_ACCOUNT and the member pointers.
 382  ***********************************************************/
 383
 384 NTSTATUS pdb_free_sam(SAM_ACCOUNT **user)
 385 {
 386         if (*user == NULL) {
 387                 DEBUG(0,("pdb_free_sam: SAM_ACCOUNT was NULL\n"));
 388 #if 0
 389                 smb_panic("NULL pointer passed to pdb_free_sam\n");
 390 #endif
 391                 return NT_STATUS_UNSUCCESSFUL;
 392         }
 393
 394         pdb_free_sam_contents(*user);
 395
 396         if ((*user)->free_fn) {
 397                 (*user)->free_fn(user);
 398         }
 399
 400         return NT_STATUS_OK;
 401 }
 402
 403
 404 /**********************************************************
 405  Encode the account control bits into a string.
 406  length = length of string to encode into (including terminating
 407  null). length *MUST BE MORE THAN 2* !
 408  **********************************************************/
 409
 410 char *pdb_encode_acct_ctrl(uint16 acct_ctrl, size_t length)
 411 {
 412         static fstring acct_str;
 413         size_t i = 0;
 414
 415         acct_str[i++] = '[';
 416
 417         if (acct_ctrl & ACB_PWNOTREQ ) acct_str[i++] = 'N';
 418         if (acct_ctrl & ACB_DISABLED ) acct_str[i++] = 'D';
 419         if (acct_ctrl & ACB_HOMDIRREQ) acct_str[i++] = 'H';
 420         if (acct_ctrl & ACB_TEMPDUP  ) acct_str[i++] = 'T';
 421         if (acct_ctrl & ACB_NORMAL   ) acct_str[i++] = 'U';
 422         if (acct_ctrl & ACB_MNS      ) acct_str[i++] = 'M';
 423         if (acct_ctrl & ACB_WSTRUST  ) acct_str[i++] = 'W';
 424         if (acct_ctrl & ACB_SVRTRUST ) acct_str[i++] = 'S';
 425         if (acct_ctrl & ACB_AUTOLOCK ) acct_str[i++] = 'L';
 426         if (acct_ctrl & ACB_PWNOEXP  ) acct_str[i++] = 'X';
 427         if (acct_ctrl & ACB_DOMTRUST ) acct_str[i++] = 'I';
 428
 429         for ( ; i < length - 2 ; i++ )
 430                 acct_str[i] = ' ';
 431
 432         i = length - 2;
 433         acct_str[i++] = ']';
 434         acct_str[i++] = '\0';
 435
 436         return acct_str;
 437 }
 438
 439 /**********************************************************
 440  Decode the account control bits from a string.
 441  **********************************************************/
 442
 443 uint16 pdb_decode_acct_ctrl(const char *p)
 444 {
 445         uint16 acct_ctrl = 0;
 446         BOOL finished = False;
 447
 448         /*
 449          * Check if the account type bits have been encoded after the
 450          * NT password (in the form [NDHTUWSLXI]).
 451          */
 452
 453         if (*p != '[')
 454                 return 0;
 455
 456         for (p++; *p && !finished; p++) {
 457                 switch (*p) {
 458                         case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
 459                         case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
 460                         case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
 461                         case 'T': { acct_ctrl |= ACB_TEMPDUP  ; break; /* 'T'emp account. */ }
 462                         case 'U': { acct_ctrl |= ACB_NORMAL   ; break; /* 'U'ser account (normal). */ }
 463                         case 'M': { acct_ctrl |= ACB_MNS      ; break; /* 'M'NS logon user account. What is this ? */ }
 464                         case 'W': { acct_ctrl |= ACB_WSTRUST  ; break; /* 'W'orkstation account. */ }
 465                         case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
 466                         case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
 467                         case 'X': { acct_ctrl |= ACB_PWNOEXP  ; break; /* No 'X'piry on password */ }
 468                         case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
 469             case ' ': { break; }
 470                         case ':':
 471                         case '\n':
 472                         case '\0':
 473                         case ']':
 474                         default:  { finished = True; }
 475                 }
 476         }
 477
 478         return acct_ctrl;
 479 }
 480
 481 /*************************************************************
 482  Routine to set 32 hex password characters from a 16 byte array.
 483 **************************************************************/
 484
 485 void pdb_sethexpwd(char *p, const unsigned char *pwd, uint16 acct_ctrl)
 486 {
 487         if (pwd != NULL) {
 488                 int i;
 489                 for (i = 0; i < 16; i++)
 490                         slprintf(&p[i*2], 3, "%02X", pwd[i]);
 491         } else {
 492                 if (acct_ctrl & ACB_PWNOTREQ)
 493                         safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
 494                 else
 495                         safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
 496         }
 497 }
 498
 499 /*************************************************************
 500  Routine to get the 32 hex characters and turn them
 501  into a 16 byte array.
 502 **************************************************************/
 503
 504 BOOL pdb_gethexpwd(const char *p, unsigned char *pwd)
 505 {
 506         int i;
 507         unsigned char   lonybble, hinybble;
 508         const char      *hexchars = "0123456789ABCDEF";
 509         char           *p1, *p2;
 510
 511         if (!p)
 512                 return (False);
 513
 514         for (i = 0; i < 32; i += 2) {
 515                 hinybble = toupper(p[i]);
 516                 lonybble = toupper(p[i + 1]);
 517
 518                 p1 = strchr(hexchars, hinybble);
 519                 p2 = strchr(hexchars, lonybble);
 520
 521                 if (!p1 || !p2)
 522                         return (False);
 523
 524                 hinybble = PTR_DIFF(p1, hexchars);
 525                 lonybble = PTR_DIFF(p2, hexchars);
 526
 527                 pwd[i / 2] = (hinybble << 4) | lonybble;
 528         }
 529         return (True);
 530 }
 531
 532 /*******************************************************************
 533  Converts NT user RID to a UNIX uid.
 534  ********************************************************************/
 535
 536 static int algorithmic_rid_base(void)
 537 {
 538         static int rid_offset = 0;
 539
 540         if (rid_offset != 0)
 541                 return rid_offset;
 542
 543         rid_offset = lp_algorithmic_rid_base();
 544
 545         if (rid_offset < BASE_RID) {
 546                 /* Try to prevent admin foot-shooting, we can't put algorithmic
 547                    rids below 1000, that's the 'well known RIDs' on NT */
 548                 DEBUG(0, ("'algorithmic rid base' must be equal to or above %ld\n", BASE_RID));
 549                 rid_offset = BASE_RID;
 550         }
 551         if (rid_offset & 1) {
 552                 DEBUG(0, ("algorithmic rid base must be even\n"));
 553                 rid_offset += 1;
 554         }
 555         return rid_offset;
 556 }
 557
 558
 559 uid_t fallback_pdb_user_rid_to_uid(uint32 user_rid)
 560 {
 561         int rid_offset = algorithmic_rid_base();
 562         return (uid_t)(((user_rid & (~USER_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 563 }
 564
 565
 566 /*******************************************************************
 567  converts UNIX uid to an NT User RID.
 568  ********************************************************************/
 569
 570 uint32 fallback_pdb_uid_to_user_rid(uid_t uid)
 571 {
 572         int rid_offset = algorithmic_rid_base();
 573         return (((((uint32)uid)*RID_MULTIPLIER) + rid_offset) | USER_RID_TYPE);
 574 }
 575
 576 /*******************************************************************
 577  Converts NT group RID to a UNIX gid.
 578  ********************************************************************/
 579
 580 gid_t pdb_group_rid_to_gid(uint32 group_rid)
 581 {
 582         int rid_offset = algorithmic_rid_base();
 583         return (gid_t)(((group_rid & (~GROUP_RID_TYPE))- rid_offset)/RID_MULTIPLIER);
 584 }
 585
 586 /*******************************************************************
 587  converts NT Group RID to a UNIX uid.
 588
 589  warning: you must not call that function only
 590  you must do a call to the group mapping first.
 591  there is not anymore a direct link between the gid and the rid.
 592  ********************************************************************/
 593
 594 uint32 pdb_gid_to_group_rid(gid_t gid)
 595 {
 596         int rid_offset = algorithmic_rid_base();
 597         return (((((uint32)gid)*RID_MULTIPLIER) + rid_offset) | GROUP_RID_TYPE);
 598 }
 599
 600 /*******************************************************************
 601  Decides if a RID is a well known RID.
 602  ********************************************************************/
 603
 604 static BOOL pdb_rid_is_well_known(uint32 rid)
 605 {
 606         /* Not using rid_offset here, becouse this is the actual
 607            NT fixed value (1000) */
 608
 609         return (rid < BASE_RID);
 610 }
 611
 612 /*******************************************************************
 613  Decides if a RID is a user or group RID.
 614  ********************************************************************/
 615
 616 BOOL pdb_rid_is_user(uint32 rid)
 617 {
 618   /* lkcl i understand that NT attaches an enumeration to a RID
 619    * such that it can be identified as either a user, group etc
 620    * type.  there are 5 such categories, and they are documented.
 621    */
 622         /* However, they are not in the RID, just somthing you can query
 623            seperatly.  Sorry luke :-) */
 624
 625    if(pdb_rid_is_well_known(rid)) {
 626       /*
 627        * The only well known user RIDs are DOMAIN_USER_RID_ADMIN
 628        * and DOMAIN_USER_RID_GUEST.
 629        */
 630      if(rid == DOMAIN_USER_RID_ADMIN || rid == DOMAIN_USER_RID_GUEST)
 631        return True;
 632    } else if((rid & RID_TYPE_MASK) == USER_RID_TYPE) {
 633      return True;
 634    }
 635    return False;
 636 }
 637
 638 /*******************************************************************
 639  Convert a rid into a name. Used in the lookup SID rpc.
 640  ********************************************************************/
 641
 642 BOOL local_lookup_sid(DOM_SID *sid, char *name, enum SID_NAME_USE *psid_name_use)
 643 {
 644         uint32 rid;
 645         SAM_ACCOUNT *sam_account = NULL;
 646         GROUP_MAP map;
 647
 648         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid)){
 649                 DEBUG(0,("local_sid_to_gid: sid_peek_check_rid return False! SID: %s\n",
 650                         sid_string_static(&map.sid)));
 651                 return False;
 652         }
 653         *psid_name_use = SID_NAME_UNKNOWN;
 654
 655         DEBUG(5,("local_lookup_sid: looking up RID %u.\n", (unsigned int)rid));
 656
 657         if (rid == DOMAIN_USER_RID_ADMIN) {
 658                 const char **admin_list = lp_admin_users(-1);
 659                 *psid_name_use = SID_NAME_USER;
 660                 if (admin_list) {
 661                         const char *p = *admin_list;
 662                         if(!next_token(&p, name, NULL, sizeof(fstring)))
 663                                 fstrcpy(name, "Administrator");
 664                 } else {
 665                         fstrcpy(name, "Administrator");
 666                 }
 667                 return True;
 668         }
 669
 670         /*
 671          * Don't try to convert the rid to a name if
 672          * running in appliance mode
 673          */
 674
 675         if (lp_hide_local_users())
 676                 return False;
 677
 678         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 679                 return False;
 680         }
 681
 682         /* see if the passdb can help us with the name of the user */
 683         if (pdb_getsampwsid(sam_account, sid)) {
 684                 fstrcpy(name, pdb_get_username(sam_account));
 685                 *psid_name_use = SID_NAME_USER;
 686
 687                 pdb_free_sam(&sam_account);
 688
 689                 return True;
 690         }
 691
 692         pdb_free_sam(&sam_account);
 693
 694         if (pdb_getgrsid(&map, *sid, MAPPING_WITHOUT_PRIV)) {
 695                 if (map.gid!=(gid_t)-1) {
 696                         DEBUG(5,("local_lookup_sid: mapped group %s to gid %u\n", map.nt_name, (unsigned int)map.gid));
 697                 } else {
 698                         DEBUG(5,("local_lookup_sid: mapped group %s to no unix gid.  Returning name.\n", map.nt_name));
 699                 }
 700
 701                 fstrcpy(name, map.nt_name);
 702                 *psid_name_use = map.sid_name_use;
 703                 return True;
 704         }
 705
 706         if (pdb_rid_is_user(rid)) {
 707                 uid_t uid;
 708
 709                 DEBUG(5, ("assuming RID %u is a user\n", (unsigned)rid));
 710
 711                 uid = fallback_pdb_user_rid_to_uid(rid);
 712                 slprintf(name, sizeof(fstring)-1, "unix_user.%u", (unsigned int)uid);
 713
 714                 return False;  /* Indicates that this user was 'not mapped' */
 715         } else {
 716                 gid_t gid;
 717                 struct group *gr;
 718
 719                 DEBUG(5, ("assuming RID %u is a group\n", (unsigned)rid));
 720
 721                 gid = pdb_group_rid_to_gid(rid);
 722                 gr = getgrgid(gid);
 723
 724                 *psid_name_use = SID_NAME_ALIAS;
 725
 726                 DEBUG(5,("local_lookup_sid: looking up gid %u %s\n", (unsigned int)gid,
 727                          gr ? "succeeded" : "failed" ));
 728
 729                 if(!gr) {
 730                         slprintf(name, sizeof(fstring)-1, "unix_group.%u", (unsigned int)gid);
 731                         return False; /* Indicates that this group was 'not mapped' */
 732                 }
 733
 734                 fstrcpy( name, gr->gr_name);
 735
 736                 DEBUG(5,("local_lookup_sid: found group %s for rid %u\n", name,
 737                          (unsigned int)rid ));
 738                 return True;
 739         }
 740 }
 741
 742 /*******************************************************************
 743  Convert a name into a SID. Used in the lookup name rpc.
 744  ********************************************************************/
 745
 746 BOOL local_lookup_name(const char *c_user, DOM_SID *psid, enum SID_NAME_USE *psid_name_use)
 747 {
 748         extern DOM_SID global_sid_World_Domain;
 749         DOM_SID local_sid;
 750         fstring user;
 751         SAM_ACCOUNT *sam_account = NULL;
 752         struct group *grp;
 753         GROUP_MAP map;
 754
 755         *psid_name_use = SID_NAME_UNKNOWN;
 756
 757         /*
 758          * user may be quoted a const string, and map_username and
 759          * friends can modify it. Make a modifiable copy. JRA.
 760          */
 761
 762         fstrcpy(user, c_user);
 763
 764         sid_copy(&local_sid, get_global_sam_sid());
 765
 766         /*
 767          * Special case for MACHINE\Everyone. Map to the world_sid.
 768          */
 769
 770         if(strequal(user, "Everyone")) {
 771                 sid_copy( psid, &global_sid_World_Domain);
 772                 sid_append_rid(psid, 0);
 773                 *psid_name_use = SID_NAME_ALIAS;
 774                 return True;
 775         }
 776
 777         /*
 778          * Don't lookup local unix users if running in appliance mode
 779          */
 780         if (lp_hide_local_users())
 781                 return False;
 782
 783         (void)map_username(user);
 784
 785         if (!NT_STATUS_IS_OK(pdb_init_sam(&sam_account))) {
 786                 return False;
 787         }
 788
 789         if (pdb_getsampwnam(sam_account, user)) {
 790                 sid_copy(psid, pdb_get_user_sid(sam_account));
 791                 *psid_name_use = SID_NAME_USER;
 792
 793                 pdb_free_sam(&sam_account);
 794                 return True;
 795         }
 796
 797         pdb_free_sam(&sam_account);
 798
 799         /*
 800          * Maybe it was a group ?
 801          */
 802
 803         /* check if it's a mapped group */
 804         if (pdb_getgrnam(&map, user, MAPPING_WITHOUT_PRIV)) {
 805                 /* yes it's a mapped group */
 806                 sid_copy(&local_sid, &map.sid);
 807                 *psid_name_use = map.sid_name_use;
 808         } else {
 809                 /* it's not a mapped group */
 810                 grp = getgrnam(user);
 811                 if(!grp)
 812                         return False;
 813
 814                 /*
 815                  *check if it's mapped, if it is reply it doesn't exist
 816                  *
 817                  * that's to prevent this case:
 818                  *
 819                  * unix group ug is mapped to nt group ng
 820                  * someone does a lookup on ug
 821                  * we must not reply as it doesn't "exist" anymore
 822                  * for NT. For NT only ng exists.
 823                  * JFM, 30/11/2001
 824                  */
 825
 826                 if (pdb_getgrgid(&map, grp->gr_gid, MAPPING_WITHOUT_PRIV)){
 827                         return False;
 828                 }
 829
 830                 sid_append_rid( &local_sid, pdb_gid_to_group_rid(grp->gr_gid));
 831                 *psid_name_use = SID_NAME_ALIAS;
 832         }
 833
 834         sid_copy( psid, &local_sid);
 835
 836         return True;
 837 }
 838
 839 /****************************************************************************
 840  Convert a uid to SID - locally.
 841 ****************************************************************************/
 842
 843 DOM_SID *local_uid_to_sid(DOM_SID *psid, uid_t uid)
 844 {
 845         struct passwd *pass;
 846         SAM_ACCOUNT *sam_user = NULL;
 847         fstring str; /* sid string buffer */
 848
 849         sid_copy(psid, get_global_sam_sid());
 850
 851         if((pass = getpwuid_alloc(uid))) {
 852
 853                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user))) {
 854                         passwd_free(&pass);
 855                         return NULL;
 856                 }
 857
 858                 if (pdb_getsampwnam(sam_user, pass->pw_name)) {
 859                         sid_copy(psid, pdb_get_user_sid(sam_user));
 860                 } else {
 861                         sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 862                 }
 863
 864                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (%s).\n",
 865                           (unsigned)uid, sid_to_string( str, psid),
 866                           pass->pw_name ));
 867
 868                 passwd_free(&pass);
 869                 pdb_free_sam(&sam_user);
 870
 871         } else {
 872                 sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
 873
 874                 DEBUG(10,("local_uid_to_sid: uid %u -> SID (%s) (unknown user).\n",
 875                           (unsigned)uid, sid_to_string( str, psid)));
 876         }
 877
 878         return psid;
 879 }
 880
 881 /****************************************************************************
 882  Convert a SID to uid - locally.
 883 ****************************************************************************/
 884
 885 BOOL local_sid_to_uid(uid_t *puid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 886 {
 887         fstring str;
 888         SAM_ACCOUNT *sam_user = NULL;
 889
 890         *name_type = SID_NAME_UNKNOWN;
 891
 892         if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 893                 return False;
 894
 895         if (pdb_getsampwsid(sam_user, psid)) {
 896
 897                 if (!IS_SAM_SET(sam_user,PDB_UID)&&!IS_SAM_CHANGED(sam_user,PDB_UID)) {
 898                         pdb_free_sam(&sam_user);
 899                         return False;
 900                 }
 901
 902                 *puid = pdb_get_uid(sam_user);
 903
 904                 DEBUG(10,("local_sid_to_uid: SID %s -> uid (%u) (%s).\n", sid_to_string( str, psid),
 905                           (unsigned int)*puid, pdb_get_username(sam_user)));
 906                 pdb_free_sam(&sam_user);
 907         } else {
 908
 909                 DOM_SID dom_sid;
 910                 uint32 rid;
 911                 GROUP_MAP map;
 912
 913                 pdb_free_sam(&sam_user);
 914
 915                 if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
 916                         DEBUG(3, ("local_sid_to_uid: SID '%s' is a group, not a user... \n", sid_to_string(str, psid)));
 917                         /* It's a group, not a user... */
 918                         return False;
 919                 }
 920
 921                 sid_copy(&dom_sid, psid);
 922                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
 923                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
 924                         return False;
 925                 }
 926
 927                 if (!pdb_rid_is_user(rid)) {
 928                         DEBUG(3, ("local_sid_to_uid: sid '%s' cannot be mapped to a uid algorithmicly becouse it is a group\n", sid_to_string(str, psid)));
 929                         return False;
 930                 }
 931
 932                 *puid = fallback_pdb_user_rid_to_uid(rid);
 933
 934                 DEBUG(5,("local_sid_to_uid: SID %s algorithmicly mapped to %ld mapped becouse SID was not found in passdb.\n",
 935                          sid_to_string(str, psid), (signed long int)(*puid)));
 936         }
 937
 938         *name_type = SID_NAME_USER;
 939
 940         return True;
 941 }
 942
 943 /****************************************************************************
 944  Convert a gid to SID - locally.
 945 ****************************************************************************/
 946
 947 DOM_SID *local_gid_to_sid(DOM_SID *psid, gid_t gid)
 948 {
 949         GROUP_MAP map;
 950
 951         sid_copy(psid, get_global_sam_sid());
 952
 953         if (pdb_getgrgid(&map, gid, MAPPING_WITHOUT_PRIV)) {
 954                 sid_copy(psid, &map.sid);
 955         }
 956         else {
 957                 sid_append_rid(psid, pdb_gid_to_group_rid(gid));
 958         }
 959
 960         return psid;
 961 }
 962
 963 /****************************************************************************
 964  Convert a SID to gid - locally.
 965 ****************************************************************************/
 966
 967 BOOL local_sid_to_gid(gid_t *pgid, const DOM_SID *psid, enum SID_NAME_USE *name_type)
 968 {
 969         fstring str;
 970         GROUP_MAP map;
 971
 972         *name_type = SID_NAME_UNKNOWN;
 973
 974         /*
 975          * We can only convert to a gid if this is our local
 976          * Domain SID (ie. we are the controling authority).
 977          *
 978          * Or in the Builtin SID too. JFM, 11/30/2001
 979          */
 980
 981         if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
 982
 983                 /* the SID is in the mapping table but not mapped */
 984                 if (map.gid==(gid_t)-1)
 985                         return False;
 986
 987                 *pgid = map.gid;
 988                 *name_type = map.sid_name_use;
 989                 DEBUG(10,("local_sid_to_gid: mapped SID %s (%s) -> gid (%u).\n",
 990                           sid_to_string( str, psid),
 991                           map.nt_name, (unsigned int)*pgid));
 992
 993         } else {
 994                 uint32 rid;
 995                 SAM_ACCOUNT *sam_user = NULL;
 996                 if (NT_STATUS_IS_ERR(pdb_init_sam(&sam_user)))
 997                         return False;
 998
 999                 if (pdb_getsampwsid(sam_user, psid)) {
1000                         return False;
1001                         pdb_free_sam(&sam_user);
1002                 }
1003
1004                 pdb_free_sam(&sam_user);
1005
1006                 if (!sid_peek_check_rid(get_global_sam_sid(), psid, &rid)) {
1007                         DEBUG(3, ("sid_peek_rid failed - sid '%s' is not in our domain\n", sid_to_string(str, psid)));
1008                         return False;
1009                 }
1010
1011                 if (pdb_rid_is_user(rid))
1012                         return False;
1013
1014                 *pgid = pdb_group_rid_to_gid(rid);
1015                 *name_type = SID_NAME_ALIAS;
1016                 DEBUG(10,("local_sid_to_gid: SID %s -> gid (%u).\n", sid_to_string( str, psid),
1017                           (unsigned int)*pgid));
1018         }
1019
1020         return True;
1021 }
1022
1023 /*************************************************************
1024  Change a password entry in the local smbpasswd file.
1025
1026 It is currently being called by SWAT and by smbpasswd.
1027
1028  --jerry
1029  *************************************************************/
1030
1031 BOOL local_password_change(const char *user_name, int local_flags,
1032                            const char *new_passwd,
1033                            char *err_str, size_t err_str_len,
1034                            char *msg_str, size_t msg_str_len)
1035 {
1036         SAM_ACCOUNT     *sam_pass=NULL;
1037         uint16 other_acb;
1038
1039         *err_str = '\0';
1040         *msg_str = '\0';
1041
1042         /* Get the smb passwd entry for this user */
1043         pdb_init_sam(&sam_pass);
1044         if(!pdb_getsampwnam(sam_pass, user_name)) {
1045                 pdb_free_sam(&sam_pass);
1046
1047                 if ((local_flags & LOCAL_ADD_USER) || (local_flags & LOCAL_DELETE_USER)) {
1048                         /* Might not exist in /etc/passwd */
1049                         if (!NT_STATUS_IS_OK(pdb_init_sam_new(&sam_pass, user_name))) {
1050                                 slprintf(err_str, err_str_len-1, "Failed initialise SAM_ACCOUNT for user %s.\n", user_name);
1051                                 return False;
1052                         }
1053                 } else {
1054                         slprintf(err_str, err_str_len-1,"Failed to find entry for user %s.\n", user_name);
1055                         return False;
1056                 }
1057         } else {
1058                 /* the entry already existed */
1059                 local_flags &= ~LOCAL_ADD_USER;
1060         }
1061
1062         /* the 'other' acb bits not being changed here */
1063         other_acb =  (pdb_get_acct_ctrl(sam_pass) & (!(ACB_WSTRUST|ACB_DOMTRUST|ACB_SVRTRUST|ACB_NORMAL)));
1064         if (local_flags & LOCAL_TRUST_ACCOUNT) {
1065                 if (!pdb_set_acct_ctrl(sam_pass, ACB_WSTRUST | other_acb, PDB_CHANGED) ) {
1066                         slprintf(err_str, err_str_len - 1, "Failed to set 'trusted workstation account' flags for user %s.\n", user_name);
1067                         pdb_free_sam(&sam_pass);
1068                         return False;
1069                 }
1070         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
1071                 if (!pdb_set_acct_ctrl(sam_pass, ACB_DOMTRUST | other_acb, PDB_CHANGED)) {
1072                         slprintf(err_str, err_str_len - 1, "Failed to set 'domain trust account' flags for user %s.\n", user_name);
1073                         pdb_free_sam(&sam_pass);
1074                         return False;
1075                 }
1076         } else {
1077                 if (!pdb_set_acct_ctrl(sam_pass, ACB_NORMAL | other_acb, PDB_CHANGED)) {
1078                         slprintf(err_str, err_str_len - 1, "Failed to set 'normal account' flags for user %s.\n", user_name);
1079                         pdb_free_sam(&sam_pass);
1080                         return False;
1081                 }
1082         }
1083
1084         /*
1085          * We are root - just write the new password
1086          * and the valid last change time.
1087          */
1088
1089         if (local_flags & LOCAL_DISABLE_USER) {
1090                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_DISABLED, PDB_CHANGED)) {
1091                         slprintf(err_str, err_str_len-1, "Failed to set 'disabled' flag for user %s.\n", user_name);
1092                         pdb_free_sam(&sam_pass);
1093                         return False;
1094                 }
1095         } else if (local_flags & LOCAL_ENABLE_USER) {
1096                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1097                         slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1098                         pdb_free_sam(&sam_pass);
1099                         return False;
1100                 }
1101         }
1102
1103         if (local_flags & LOCAL_SET_NO_PASSWORD) {
1104                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)|ACB_PWNOTREQ, PDB_CHANGED)) {
1105                         slprintf(err_str, err_str_len-1, "Failed to set 'no password required' flag for user %s.\n", user_name);
1106                         pdb_free_sam(&sam_pass);
1107                         return False;
1108                 }
1109         } else if (local_flags & LOCAL_SET_PASSWORD) {
1110                 /*
1111                  * If we're dealing with setting a completely empty user account
1112                  * ie. One with a password of 'XXXX', but not set disabled (like
1113                  * an account created from scratch) then if the old password was
1114                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
1115                  * We remove that as we're giving this user their first password
1116                  * and the decision hasn't really been made to disable them (ie.
1117                  * don't create them disabled). JRA.
1118                  */
1119                 if ((pdb_get_lanman_passwd(sam_pass)==NULL) && (pdb_get_acct_ctrl(sam_pass)&ACB_DISABLED)) {
1120                         if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_DISABLED), PDB_CHANGED)) {
1121                                 slprintf(err_str, err_str_len-1, "Failed to unset 'disabled' flag for user %s.\n", user_name);
1122                                 pdb_free_sam(&sam_pass);
1123                                 return False;
1124                         }
1125                 }
1126                 if (!pdb_set_acct_ctrl (sam_pass, pdb_get_acct_ctrl(sam_pass)&(~ACB_PWNOTREQ), PDB_CHANGED)) {
1127                         slprintf(err_str, err_str_len-1, "Failed to unset 'no password required' flag for user %s.\n", user_name);
1128                         pdb_free_sam(&sam_pass);
1129                         return False;
1130                 }
1131
1132                 if (!pdb_set_plaintext_passwd (sam_pass, new_passwd)) {
1133                         slprintf(err_str, err_str_len-1, "Failed to set password for user %s.\n", user_name);
1134                         pdb_free_sam(&sam_pass);
1135                         return False;
1136                 }
1137         }
1138
1139         if (local_flags & LOCAL_ADD_USER) {
1140                 if (pdb_add_sam_account(sam_pass)) {
1141                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
1142                         pdb_free_sam(&sam_pass);
1143                         return True;
1144                 } else {
1145                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
1146                         pdb_free_sam(&sam_pass);
1147                         return False;
1148                 }
1149         } else if (local_flags & LOCAL_DELETE_USER) {
1150                 if (!pdb_delete_sam_account(sam_pass)) {
1151                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
1152                         pdb_free_sam(&sam_pass);
1153                         return False;
1154                 }
1155                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
1156         } else {
1157                 if(!pdb_update_sam_account(sam_pass)) {
1158                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
1159                         pdb_free_sam(&sam_pass);
1160                         return False;
1161                 }
1162                 if(local_flags & LOCAL_DISABLE_USER)
1163                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
1164                 else if (local_flags & LOCAL_ENABLE_USER)
1165                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
1166                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
1167                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
1168         }
1169
1170         pdb_free_sam(&sam_pass);
1171         return True;
1172 }