source3/auth/pass_check.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password checking
   4    Copyright (C) Andrew Tridgell 1992-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 /* this module is for checking a username/password against a system
  22    password database. The SMB encrypted password support is elsewhere */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 /* these are kept here to keep the string_combinations function simple */
  30 static fstring this_user;
  31 #if !defined(WITH_PAM)
  32 static fstring this_salt;
  33 static fstring this_crypted;
  34 #endif
  35
  36 #ifdef WITH_AFS
  37
  38 #include <afs/stds.h>
  39 #include <afs/kautils.h>
  40
  41 /*******************************************************************
  42 check on AFS authentication
  43 ********************************************************************/
  44 static BOOL afs_auth(char *user, char *password)
  45 {
  46         long password_expires = 0;
  47         char *reason;
  48
  49         /* For versions of AFS prior to 3.3, this routine has few arguments, */
  50         /* but since I can't find the old documentation... :-)               */
  51         setpag();
  52         if (ka_UserAuthenticateGeneral
  53             (KA_USERAUTH_VERSION + KA_USERAUTH_DOSETPAG, user, (char *)0,       /* instance */
  54              (char *)0,         /* cell */
  55              password, 0,       /* lifetime, default */
  56              &password_expires, /*days 'til it expires */
  57              0,                 /* spare 2 */
  58              &reason) == 0)
  59         {
  60                 return (True);
  61         }
  62         DEBUG(1,
  63               ("AFS authentication for \"%s\" failed (%s)\n", user, reason));
  64         return (False);
  65 }
  66 #endif
  67
  68
  69 #ifdef WITH_DFS
  70
  71 #include <dce/dce_error.h>
  72 #include <dce/sec_login.h>
  73
  74 /*****************************************************************
  75  This new version of the DFS_AUTH code was donated by Karsten Muuss
  76  <muuss@or.uni-bonn.de>. It fixes the following problems with the
  77  old code :
  78
  79   - Server credentials may expire
  80   - Client credential cache files have wrong owner
  81   - purge_context() function is called with invalid argument
  82
  83  This new code was modified to ensure that on exit the uid/gid is
  84  still root, and the original directory is restored. JRA.
  85 ******************************************************************/
  86
  87 sec_login_handle_t my_dce_sec_context;
  88 int dcelogin_atmost_once = 0;
  89
  90 /*******************************************************************
  91 check on a DCE/DFS authentication
  92 ********************************************************************/
  93 static BOOL dfs_auth(char *user, char *password)
  94 {
  95         error_status_t err;
  96         int err2;
  97         int prterr;
  98         signed32 expire_time, current_time;
  99         boolean32 password_reset;
 100         struct passwd *pw;
 101         sec_passwd_rec_t passwd_rec;
 102         sec_login_auth_src_t auth_src = sec_login_auth_src_network;
 103         unsigned char dce_errstr[dce_c_error_string_len];
 104         gid_t egid;
 105
 106         if (dcelogin_atmost_once)
 107                 return (False);
 108
 109 #ifdef HAVE_CRYPT
 110         /*
 111          * We only go for a DCE login context if the given password
 112          * matches that stored in the local password file..
 113          * Assumes local passwd file is kept in sync w/ DCE RGY!
 114          */
 115
 116         if (strcmp((char *)crypt(password, this_salt), this_crypted))
 117         {
 118                 return (False);
 119         }
 120 #endif
 121
 122         sec_login_get_current_context(&my_dce_sec_context, &err);
 123         if (err != error_status_ok)
 124         {
 125                 dce_error_inq_text(err, dce_errstr, &err2);
 126                 DEBUG(0, ("DCE can't get current context. %s\n", dce_errstr));
 127
 128                 return (False);
 129         }
 130
 131         sec_login_certify_identity(my_dce_sec_context, &err);
 132         if (err != error_status_ok)
 133         {
 134                 dce_error_inq_text(err, dce_errstr, &err2);
 135                 DEBUG(0, ("DCE can't get current context. %s\n", dce_errstr));
 136
 137                 return (False);
 138         }
 139
 140         sec_login_get_expiration(my_dce_sec_context, &expire_time, &err);
 141         if (err != error_status_ok)
 142         {
 143                 dce_error_inq_text(err, dce_errstr, &err2);
 144                 DEBUG(0, ("DCE can't get expiration. %s\n", dce_errstr));
 145
 146                 return (False);
 147         }
 148
 149         time(&current_time);
 150
 151         if (expire_time < (current_time + 60))
 152         {
 153                 struct passwd *pw;
 154                 sec_passwd_rec_t *key;
 155
 156                 sec_login_get_pwent(my_dce_sec_context,
 157                                     (sec_login_passwd_t *) & pw, &err);
 158                 if (err != error_status_ok)
 159                 {
 160                         dce_error_inq_text(err, dce_errstr, &err2);
 161                         DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
 162
 163                         return (False);
 164                 }
 165
 166                 sec_login_refresh_identity(my_dce_sec_context, &err);
 167                 if (err != error_status_ok)
 168                 {
 169                         dce_error_inq_text(err, dce_errstr, &err2);
 170                         DEBUG(0, ("DCE can't refresh identity. %s\n",
 171                                   dce_errstr));
 172
 173                         return (False);
 174                 }
 175
 176                 sec_key_mgmt_get_key(rpc_c_authn_dce_secret, NULL,
 177                                      (unsigned char *)pw->pw_name,
 178                                      sec_c_key_version_none,
 179                                      (void **)&key, &err);
 180                 if (err != error_status_ok)
 181                 {
 182                         dce_error_inq_text(err, dce_errstr, &err2);
 183                         DEBUG(0, ("DCE can't get key for %s. %s\n",
 184                                   pw->pw_name, dce_errstr));
 185
 186                         return (False);
 187                 }
 188
 189                 sec_login_valid_and_cert_ident(my_dce_sec_context, key,
 190                                                &password_reset, &auth_src,
 191                                                &err);
 192                 if (err != error_status_ok)
 193                 {
 194                         dce_error_inq_text(err, dce_errstr, &err2);
 195                         DEBUG(0,
 196                               ("DCE can't validate and certify identity for %s. %s\n",
 197                                pw->pw_name, dce_errstr));
 198                 }
 199
 200                 sec_key_mgmt_free_key(key, &err);
 201                 if (err != error_status_ok)
 202                 {
 203                         dce_error_inq_text(err, dce_errstr, &err2);
 204                         DEBUG(0, ("DCE can't free key.\n", dce_errstr));
 205                 }
 206         }
 207
 208         if (sec_login_setup_identity((unsigned char *)user,
 209                                      sec_login_no_flags,
 210                                      &my_dce_sec_context, &err) == 0)
 211         {
 212                 dce_error_inq_text(err, dce_errstr, &err2);
 213                 DEBUG(0, ("DCE Setup Identity for %s failed: %s\n",
 214                           user, dce_errstr));
 215                 return (False);
 216         }
 217
 218         sec_login_get_pwent(my_dce_sec_context,
 219                             (sec_login_passwd_t *) & pw, &err);
 220         if (err != error_status_ok)
 221         {
 222                 dce_error_inq_text(err, dce_errstr, &err2);
 223                 DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
 224
 225                 return (False);
 226         }
 227
 228         sec_login_purge_context(&my_dce_sec_context, &err);
 229         if (err != error_status_ok)
 230         {
 231                 dce_error_inq_text(err, dce_errstr, &err2);
 232                 DEBUG(0, ("DCE can't purge context. %s\n", dce_errstr));
 233
 234                 return (False);
 235         }
 236
 237         /*
 238          * NB. I'd like to change these to call something like change_to_user()
 239          * instead but currently we don't have a connection
 240          * context to become the correct user. This is already
 241          * fairly platform specific code however, so I think
 242          * this should be ok. I have added code to go
 243          * back to being root on error though. JRA.
 244          */
 245
 246         egid = getegid();
 247
 248         set_effective_gid(pw->pw_gid);
 249         set_effective_uid(pw->pw_uid);
 250
 251         if (sec_login_setup_identity((unsigned char *)user,
 252                                      sec_login_no_flags,
 253                                      &my_dce_sec_context, &err) == 0)
 254         {
 255                 dce_error_inq_text(err, dce_errstr, &err2);
 256                 DEBUG(0, ("DCE Setup Identity for %s failed: %s\n",
 257                           user, dce_errstr));
 258                 goto err;
 259         }
 260
 261         sec_login_get_pwent(my_dce_sec_context,
 262                             (sec_login_passwd_t *) & pw, &err);
 263         if (err != error_status_ok)
 264         {
 265                 dce_error_inq_text(err, dce_errstr, &err2);
 266                 DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
 267                 goto err;
 268         }
 269
 270         passwd_rec.version_number = sec_passwd_c_version_none;
 271         passwd_rec.pepper = NULL;
 272         passwd_rec.key.key_type = sec_passwd_plain;
 273         passwd_rec.key.tagged_union.plain = (idl_char *) password;
 274
 275         sec_login_validate_identity(my_dce_sec_context,
 276                                     &passwd_rec, &password_reset,
 277                                     &auth_src, &err);
 278         if (err != error_status_ok)
 279         {
 280                 dce_error_inq_text(err, dce_errstr, &err2);
 281                 DEBUG(0,
 282                       ("DCE Identity Validation failed for principal %s: %s\n",
 283                        user, dce_errstr));
 284                 goto err;
 285         }
 286
 287         sec_login_certify_identity(my_dce_sec_context, &err);
 288         if (err != error_status_ok)
 289         {
 290                 dce_error_inq_text(err, dce_errstr, &err2);
 291                 DEBUG(0, ("DCE certify identity failed: %s\n", dce_errstr));
 292                 goto err;
 293         }
 294
 295         if (auth_src != sec_login_auth_src_network)
 296         {
 297                 DEBUG(0, ("DCE context has no network credentials.\n"));
 298         }
 299
 300         sec_login_set_context(my_dce_sec_context, &err);
 301         if (err != error_status_ok)
 302         {
 303                 dce_error_inq_text(err, dce_errstr, &err2);
 304                 DEBUG(0,
 305                       ("DCE login failed for principal %s, cant set context: %s\n",
 306                        user, dce_errstr));
 307
 308                 sec_login_purge_context(&my_dce_sec_context, &err);
 309                 goto err;
 310         }
 311
 312         sec_login_get_pwent(my_dce_sec_context,
 313                             (sec_login_passwd_t *) & pw, &err);
 314         if (err != error_status_ok)
 315         {
 316                 dce_error_inq_text(err, dce_errstr, &err2);
 317                 DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
 318                 goto err;
 319         }
 320
 321         DEBUG(0, ("DCE login succeeded for principal %s on pid %d\n",
 322                   user, sys_getpid()));
 323
 324         DEBUG(3, ("DCE principal: %s\n"
 325                   "          uid: %d\n"
 326                   "          gid: %d\n",
 327                   pw->pw_name, pw->pw_uid, pw->pw_gid));
 328         DEBUG(3, ("         info: %s\n"
 329                   "          dir: %s\n"
 330                   "        shell: %s\n",
 331                   pw->pw_gecos, pw->pw_dir, pw->pw_shell));
 332
 333         sec_login_get_expiration(my_dce_sec_context, &expire_time, &err);
 334         if (err != error_status_ok)
 335         {
 336                 dce_error_inq_text(err, dce_errstr, &err2);
 337                 DEBUG(0, ("DCE can't get expiration. %s\n", dce_errstr));
 338                 goto err;
 339         }
 340
 341         set_effective_uid(0);
 342         set_effective_gid(0);
 343
 344         DEBUG(0,
 345               ("DCE context expires: %s", asctime(localtime(&expire_time))));
 346
 347         dcelogin_atmost_once = 1;
 348         return (True);
 349
 350       err:
 351
 352         /* Go back to root, JRA. */
 353         set_effective_uid(0);
 354         set_effective_gid(egid);
 355         return (False);
 356 }
 357
 358 void dfs_unlogin(void)
 359 {
 360         error_status_t err;
 361         int err2;
 362         unsigned char dce_errstr[dce_c_error_string_len];
 363
 364         sec_login_purge_context(&my_dce_sec_context, &err);
 365         if (err != error_status_ok)
 366         {
 367                 dce_error_inq_text(err, dce_errstr, &err2);
 368                 DEBUG(0,
 369                       ("DCE purge login context failed for server instance %d: %s\n",
 370                        sys_getpid(), dce_errstr));
 371         }
 372 }
 373 #endif
 374
 375 #ifdef LINUX_BIGCRYPT
 376 /****************************************************************************
 377 an enhanced crypt for Linux to handle password longer than 8 characters
 378 ****************************************************************************/
 379 static int linux_bigcrypt(char *password, char *salt1, char *crypted)
 380 {
 381 #define LINUX_PASSWORD_SEG_CHARS 8
 382         char salt[3];
 383         int i;
 384
 385         StrnCpy(salt, salt1, 2);
 386         crypted += 2;
 387
 388         for (i = strlen(password); i > 0; i -= LINUX_PASSWORD_SEG_CHARS) {
 389                 char *p = crypt(password, salt) + 2;
 390                 if (strncmp(p, crypted, LINUX_PASSWORD_SEG_CHARS) != 0)
 391                         return (0);
 392                 password += LINUX_PASSWORD_SEG_CHARS;
 393                 crypted += strlen(p);
 394         }
 395
 396         return (1);
 397 }
 398 #endif
 399
 400 #ifdef OSF1_ENH_SEC
 401 /****************************************************************************
 402 an enhanced crypt for OSF1
 403 ****************************************************************************/
 404 static char *osf1_bigcrypt(char *password, char *salt1)
 405 {
 406         static char result[AUTH_MAX_PASSWD_LENGTH] = "";
 407         char *p1;
 408         char *p2 = password;
 409         char salt[3];
 410         int i;
 411         int parts = strlen(password) / AUTH_CLEARTEXT_SEG_CHARS;
 412         if (strlen(password) % AUTH_CLEARTEXT_SEG_CHARS)
 413                 parts++;
 414
 415         StrnCpy(salt, salt1, 2);
 416         StrnCpy(result, salt1, 2);
 417         result[2] = '\0';
 418
 419         for (i = 0; i < parts; i++) {
 420                 p1 = crypt(p2, salt);
 421                 strncat(result, p1 + 2,
 422                         AUTH_MAX_PASSWD_LENGTH - strlen(p1 + 2) - 1);
 423                 StrnCpy(salt, &result[2 + i * AUTH_CIPHERTEXT_SEG_CHARS], 2);
 424                 p2 += AUTH_CLEARTEXT_SEG_CHARS;
 425         }
 426
 427         return (result);
 428 }
 429 #endif
 430
 431
 432 /****************************************************************************
 433 apply a function to upper/lower case combinations
 434 of a string and return true if one of them returns true.
 435 try all combinations with N uppercase letters.
 436 offset is the first char to try and change (start with 0)
 437 it assumes the string starts lowercased
 438 ****************************************************************************/
 439 static NTSTATUS string_combinations2(char *s, int offset, NTSTATUS (*fn) (const char *),
 440                                  int N)
 441 {
 442         int len = strlen(s);
 443         int i;
 444         NTSTATUS nt_status;
 445
 446 #ifdef PASSWORD_LENGTH
 447         len = MIN(len, PASSWORD_LENGTH);
 448 #endif
 449
 450         if (N <= 0 || offset >= len)
 451                 return (fn(s));
 452
 453         for (i = offset; i < (len - (N - 1)); i++) {
 454                 char c = s[i];
 455                 if (!islower(c))
 456                         continue;
 457                 s[i] = toupper(c);
 458                 if (!NT_STATUS_EQUAL(nt_status = string_combinations2(s, i + 1, fn, N - 1),NT_STATUS_WRONG_PASSWORD)) {
 459                         return (nt_status);
 460                 }
 461                 s[i] = c;
 462         }
 463         return (NT_STATUS_WRONG_PASSWORD);
 464 }
 465
 466 /****************************************************************************
 467 apply a function to upper/lower case combinations
 468 of a string and return true if one of them returns true.
 469 try all combinations with up to N uppercase letters.
 470 offset is the first char to try and change (start with 0)
 471 it assumes the string starts lowercased
 472 ****************************************************************************/
 473 static NTSTATUS string_combinations(char *s, NTSTATUS (*fn) (const char *), int N)
 474 {
 475         int n;
 476         NTSTATUS nt_status;
 477         for (n = 1; n <= N; n++)
 478                 if (!NT_STATUS_EQUAL(nt_status = string_combinations2(s, 0, fn, n), NT_STATUS_WRONG_PASSWORD))
 479                         return nt_status;
 480         return NT_STATUS_WRONG_PASSWORD;
 481 }
 482
 483
 484 /****************************************************************************
 485 core of password checking routine
 486 ****************************************************************************/
 487 static NTSTATUS password_check(const char *password)
 488 {
 489 #ifdef WITH_PAM
 490         return smb_pam_passcheck(this_user, password);
 491 #else
 492
 493         BOOL ret;
 494
 495 #ifdef WITH_AFS
 496         if (afs_auth(this_user, password))
 497                 return NT_STATUS_OK;
 498 #endif /* WITH_AFS */
 499
 500 #ifdef WITH_DFS
 501         if (dfs_auth(this_user, password))
 502                 return NT_STATUS_OK;
 503 #endif /* WITH_DFS */
 504
 505 #ifdef OSF1_ENH_SEC
 506
 507         ret = (strcmp(osf1_bigcrypt(password, this_salt),
 508                       this_crypted) == 0);
 509         if (!ret) {
 510                 DEBUG(2,
 511                       ("OSF1_ENH_SEC failed. Trying normal crypt.\n"));
 512                 ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
 513         }
 514         if (ret) {
 515                 return NT_STATUS_OK;
 516         } else {
 517                 return NT_STATUS_WRONG_PASSWORD;
 518         }
 519
 520 #endif /* OSF1_ENH_SEC */
 521
 522 #ifdef ULTRIX_AUTH
 523         ret = (strcmp((char *)crypt16(password, this_salt), this_crypted) == 0);
 524         if (ret) {
 525                 return NT_STATUS_OK;
 526         } else {
 527                 return NT_STATUS_WRONG_PASSWORD;
 528         }
 529
 530 #endif /* ULTRIX_AUTH */
 531
 532 #ifdef LINUX_BIGCRYPT
 533         ret = (linux_bigcrypt(password, this_salt, this_crypted));
 534         if (ret) {
 535                 return NT_STATUS_OK;
 536         } else {
 537                 return NT_STATUS_WRONG_PASSWORD;
 538         }
 539 #endif /* LINUX_BIGCRYPT */
 540
 541 #if defined(HAVE_BIGCRYPT) && defined(HAVE_CRYPT) && defined(USE_BOTH_CRYPT_CALLS)
 542
 543         /*
 544          * Some systems have bigcrypt in the C library but might not
 545          * actually use it for the password hashes (HPUX 10.20) is
 546          * a noteable example. So we try bigcrypt first, followed
 547          * by crypt.
 548          */
 549
 550         if (strcmp(bigcrypt(password, this_salt), this_crypted) == 0)
 551                 return NT_STATUS_OK;
 552         else
 553                 ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
 554         if (ret) {
 555                 return NT_STATUS_OK;
 556         } else {
 557                 return NT_STATUS_WRONG_PASSWORD;
 558         }
 559 #else /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
 560
 561 #ifdef HAVE_BIGCRYPT
 562         ret = (strcmp(bigcrypt(password, this_salt), this_crypted) == 0);
 563         if (ret) {
 564                 return NT_STATUS_OK;
 565         } else {
 566                 return NT_STATUS_WRONG_PASSWORD;
 567         }
 568 #endif /* HAVE_BIGCRYPT */
 569
 570 #ifndef HAVE_CRYPT
 571         DEBUG(1, ("Warning - no crypt available\n"));
 572         return NT_STATUS_LOGON_FAILURE;
 573 #else /* HAVE_CRYPT */
 574         ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
 575         if (ret) {
 576                 return NT_STATUS_OK;
 577         } else {
 578                 return NT_STATUS_WRONG_PASSWORD;
 579         }
 580 #endif /* HAVE_CRYPT */
 581 #endif /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
 582 #endif /* WITH_PAM */
 583 }
 584
 585
 586
 587 /****************************************************************************
 588 CHECK if a username/password is OK
 589 the function pointer fn() points to a function to call when a successful
 590 match is found and is used to update the encrypted password file
 591 return NT_STATUS_OK on correct match, appropriate error otherwise
 592 ****************************************************************************/
 593
 594 NTSTATUS pass_check(const struct passwd *pass, const char *user, const char *password,
 595                     int pwlen, BOOL (*fn) (const char *, const char *), BOOL run_cracker)
 596 {
 597         pstring pass2;
 598         int level = lp_passwordlevel();
 599
 600         NTSTATUS nt_status;
 601
 602 #if DEBUG_PASSWORD
 603         DEBUG(100, ("checking user=[%s] pass=[%s]\n", user, password));
 604 #endif
 605
 606         if (!password)
 607                 return NT_STATUS_LOGON_FAILURE;
 608
 609         if (((!*password) || (!pwlen)) && !lp_null_passwords())
 610                 return NT_STATUS_LOGON_FAILURE;
 611
 612 #if defined(WITH_PAM)
 613
 614         /*
 615          * If we're using PAM we want to short-circuit all the
 616          * checks below and dive straight into the PAM code.
 617          */
 618
 619         fstrcpy(this_user, user);
 620
 621         DEBUG(4, ("pass_check: Checking (PAM) password for user %s (l=%d)\n", user, pwlen));
 622
 623 #else /* Not using PAM */
 624
 625         DEBUG(4, ("pass_check: Checking password for user %s (l=%d)\n", user, pwlen));
 626
 627         if (!pass) {
 628                 DEBUG(3, ("Couldn't find user %s\n", user));
 629                 return NT_STATUS_NO_SUCH_USER;
 630         }
 631
 632
 633         /* Copy into global for the convenience of looping code */
 634         /* Also the place to keep the 'password' no matter what
 635            crazy struct it started in... */
 636         fstrcpy(this_crypted, pass->pw_passwd);
 637         fstrcpy(this_salt, pass->pw_passwd);
 638
 639 #ifdef HAVE_GETSPNAM
 640         {
 641                 struct spwd *spass;
 642
 643                 /* many shadow systems require you to be root to get
 644                    the password, in most cases this should already be
 645                    the case when this function is called, except
 646                    perhaps for IPC password changing requests */
 647
 648                 spass = getspnam(pass->pw_name);
 649                 if (spass && spass->sp_pwdp) {
 650                         fstrcpy(this_crypted, spass->sp_pwdp);
 651                         fstrcpy(this_salt, spass->sp_pwdp);
 652                 }
 653         }
 654 #elif defined(IA_UINFO)
 655         {
 656                 /* Need to get password with SVR4.2's ia_ functions
 657                    instead of get{sp,pw}ent functions. Required by
 658                    UnixWare 2.x, tested on version
 659                    2.1. (tangent@cyberport.com) */
 660                 uinfo_t uinfo;
 661                 if (ia_openinfo(pass->pw_name, &uinfo) != -1)
 662                         ia_get_logpwd(uinfo, &(pass->pw_passwd));
 663         }
 664 #endif
 665
 666 #ifdef HAVE_GETPRPWNAM
 667         {
 668                 struct pr_passwd *pr_pw = getprpwnam(pass->pw_name);
 669                 if (pr_pw && pr_pw->ufld.fd_encrypt)
 670                         fstrcpy(this_crypted, pr_pw->ufld.fd_encrypt);
 671         }
 672 #endif
 673
 674 #ifdef HAVE_GETPWANAM
 675         {
 676                 struct passwd_adjunct *pwret;
 677                 pwret = getpwanam(s);
 678                 if (pwret && pwret->pwa_passwd)
 679                         fstrcpy(this_crypted, pwret->pwa_passwd);
 680         }
 681 #endif
 682
 683 #ifdef OSF1_ENH_SEC
 684         {
 685                 struct pr_passwd *mypasswd;
 686                 DEBUG(5, ("Checking password for user %s in OSF1_ENH_SEC\n",
 687                           user));
 688                 mypasswd = getprpwnam(user);
 689                 if (mypasswd) {
 690                         fstrcpy(this_user, mypasswd->ufld.fd_name);
 691                         fstrcpy(this_crypted, mypasswd->ufld.fd_encrypt);
 692                 } else {
 693                         DEBUG(5,
 694                               ("OSF1_ENH_SEC: No entry for user %s in protected database !\n",
 695                                user));
 696                 }
 697         }
 698 #endif
 699
 700 #ifdef ULTRIX_AUTH
 701         {
 702                 AUTHORIZATION *ap = getauthuid(pass->pw_uid);
 703                 if (ap) {
 704                         fstrcpy(this_crypted, ap->a_password);
 705                         endauthent();
 706                 }
 707         }
 708 #endif
 709
 710 #if defined(HAVE_TRUNCATED_SALT)
 711         /* crypt on some platforms (HPUX in particular)
 712            won't work with more than 2 salt characters. */
 713         this_salt[2] = 0;
 714 #endif
 715
 716         if (!*this_crypted) {
 717                 if (!lp_null_passwords()) {
 718                         DEBUG(2, ("Disallowing %s with null password\n",
 719                                   this_user));
 720                         return NT_STATUS_LOGON_FAILURE;
 721                 }
 722                 if (!*password) {
 723                         DEBUG(3,
 724                               ("Allowing access to %s with null password\n",
 725                                this_user));
 726                         return NT_STATUS_OK;
 727                 }
 728         }
 729
 730 #endif /* defined(WITH_PAM) */
 731
 732         /* try it as it came to us */
 733         nt_status = password_check(password);
 734         if NT_STATUS_IS_OK(nt_status) {
 735                 if (fn) {
 736                         fn(user, password);
 737                 }
 738                 return (nt_status);
 739         } else if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD)) {
 740                 /* No point continuing if its not the password thats to blame (ie PAM disabled). */
 741                 return (nt_status);
 742         }
 743
 744         if (!run_cracker) {
 745                 return (nt_status);
 746         }
 747
 748         /* if the password was given to us with mixed case then we don't
 749          * need to proceed as we know it hasn't been case modified by the
 750          * client */
 751         if (strhasupper(password) && strhaslower(password)) {
 752                 return nt_status;
 753         }
 754
 755         /* make a copy of it */
 756         pstrcpy(pass2, password);
 757
 758         /* try all lowercase if it's currently all uppercase */
 759         if (strhasupper(pass2)) {
 760                 strlower_m(pass2);
 761                 if NT_STATUS_IS_OK(nt_status = password_check(pass2)) {
 762                         if (fn)
 763                                 fn(user, pass2);
 764                         return (nt_status);
 765                 }
 766         }
 767
 768         /* give up? */
 769         if (level < 1) {
 770                 return NT_STATUS_WRONG_PASSWORD;
 771         }
 772
 773         /* last chance - all combinations of up to level chars upper! */
 774         strlower_m(pass2);
 775
 776         if (NT_STATUS_IS_OK(nt_status = string_combinations(pass2, password_check, level))) {
 777                 if (fn)
 778                         fn(user, pass2);
 779                 return nt_status;
 780         }
 781
 782         return NT_STATUS_WRONG_PASSWORD;
 783 }