source3/smbd/password.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2007.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/passwd.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../librpc/gen_ndr/netlogon.h"
  26
  27 /* Fix up prototypes for OSX 10.4, where they're missing */
  28 #ifndef HAVE_SETNETGRENT_PROTOTYPE
  29 extern int setnetgrent(const char* netgroup);
  30 #endif
  31 #ifndef HAVE_GETNETGRENT_PROTOTYPE
  32 extern int getnetgrent(char **host, char **user, char **domain);
  33 #endif
  34 #ifndef HAVE_ENDNETGRENT_PROTOTYPE
  35 extern void endnetgrent(void);
  36 #endif
  37
  38 enum server_allocated_state { SERVER_ALLOCATED_REQUIRED_YES,
  39                                 SERVER_ALLOCATED_REQUIRED_NO,
  40                                 SERVER_ALLOCATED_REQUIRED_ANY};
  41
  42 static user_struct *get_valid_user_struct_internal(
  43                         struct smbd_server_connection *sconn,
  44                         uint16 vuid,
  45                         enum server_allocated_state server_allocated)
  46 {
  47         user_struct *usp;
  48         int count=0;
  49
  50         if (vuid == UID_FIELD_INVALID)
  51                 return NULL;
  52
  53         usp=sconn->smb1.sessions.validated_users;
  54         for (;usp;usp=usp->next,count++) {
  55                 if (vuid == usp->vuid) {
  56                         switch (server_allocated) {
  57                                 case SERVER_ALLOCATED_REQUIRED_YES:
  58                                         if (usp->session_info == NULL) {
  59                                                 continue;
  60                                         }
  61                                         break;
  62                                 case SERVER_ALLOCATED_REQUIRED_NO:
  63                                         if (usp->session_info != NULL) {
  64                                                 continue;
  65                                         }
  66                                 case SERVER_ALLOCATED_REQUIRED_ANY:
  67                                         break;
  68                         }
  69                         if (count > 10) {
  70                                 DLIST_PROMOTE(sconn->smb1.sessions.validated_users,
  71                                               usp);
  72                         }
  73                         return usp;
  74                 }
  75         }
  76
  77         return NULL;
  78 }
  79
  80 /****************************************************************************
  81  Check if a uid has been validated, and return an pointer to the user_struct
  82  if it has. NULL if not. vuid is biased by an offset. This allows us to
  83  tell random client vuid's (normally zero) from valid vuids.
  84 ****************************************************************************/
  85
  86 user_struct *get_valid_user_struct(struct smbd_server_connection *sconn,
  87                                    uint16 vuid)
  88 {
  89         return get_valid_user_struct_internal(sconn, vuid,
  90                         SERVER_ALLOCATED_REQUIRED_YES);
  91 }
  92
  93 bool is_partial_auth_vuid(struct smbd_server_connection *sconn, uint16 vuid)
  94 {
  95         return (get_partial_auth_user_struct(sconn, vuid) != NULL);
  96 }
  97
  98 /****************************************************************************
  99  Get the user struct of a partial NTLMSSP login
 100 ****************************************************************************/
 101
 102 user_struct *get_partial_auth_user_struct(struct smbd_server_connection *sconn,
 103                                           uint16 vuid)
 104 {
 105         return get_valid_user_struct_internal(sconn, vuid,
 106                         SERVER_ALLOCATED_REQUIRED_NO);
 107 }
 108
 109 /****************************************************************************
 110  Invalidate a uid.
 111 ****************************************************************************/
 112
 113 void invalidate_vuid(struct smbd_server_connection *sconn, uint16 vuid)
 114 {
 115         user_struct *vuser = NULL;
 116
 117         vuser = get_valid_user_struct_internal(sconn, vuid,
 118                         SERVER_ALLOCATED_REQUIRED_ANY);
 119         if (vuser == NULL) {
 120                 return;
 121         }
 122
 123         session_yield(vuser);
 124
 125         if (vuser->auth_ntlmssp_state) {
 126                 TALLOC_FREE(vuser->auth_ntlmssp_state);
 127         }
 128
 129         DLIST_REMOVE(sconn->smb1.sessions.validated_users, vuser);
 130
 131         /* clear the vuid from the 'cache' on each connection, and
 132            from the vuid 'owner' of connections */
 133         conn_clear_vuid_caches(sconn, vuid);
 134
 135         TALLOC_FREE(vuser);
 136         sconn->smb1.sessions.num_validated_vuids--;
 137 }
 138
 139 /****************************************************************************
 140  Invalidate all vuid entries for this process.
 141 ****************************************************************************/
 142
 143 void invalidate_all_vuids(struct smbd_server_connection *sconn)
 144 {
 145         if (sconn->using_smb2) {
 146                 return;
 147         }
 148
 149         while (sconn->smb1.sessions.validated_users != NULL) {
 150                 invalidate_vuid(sconn,
 151                                 sconn->smb1.sessions.validated_users->vuid);
 152         }
 153 }
 154
 155 static void increment_next_vuid(uint16_t *vuid)
 156 {
 157         *vuid += 1;
 158
 159         /* Check for vuid wrap. */
 160         if (*vuid == UID_FIELD_INVALID) {
 161                 *vuid = VUID_OFFSET;
 162         }
 163 }
 164
 165 /****************************************************
 166  Create a new partial auth user struct.
 167 *****************************************************/
 168
 169 int register_initial_vuid(struct smbd_server_connection *sconn)
 170 {
 171         user_struct *vuser;
 172
 173         /* Paranoia check. */
 174         if(lp_security() == SEC_SHARE) {
 175                 smb_panic("register_initial_vuid: "
 176                         "Tried to register uid in security=share");
 177         }
 178
 179         /* Limit allowed vuids to 16bits - VUID_OFFSET. */
 180         if (sconn->smb1.sessions.num_validated_vuids >= 0xFFFF-VUID_OFFSET) {
 181                 return UID_FIELD_INVALID;
 182         }
 183
 184         if((vuser = talloc_zero(NULL, user_struct)) == NULL) {
 185                 DEBUG(0,("register_initial_vuid: "
 186                                 "Failed to talloc users struct!\n"));
 187                 return UID_FIELD_INVALID;
 188         }
 189
 190         /* Allocate a free vuid. Yes this is a linear search... */
 191         while( get_valid_user_struct_internal(sconn,
 192                         sconn->smb1.sessions.next_vuid,
 193                         SERVER_ALLOCATED_REQUIRED_ANY) != NULL ) {
 194                 increment_next_vuid(&sconn->smb1.sessions.next_vuid);
 195         }
 196
 197         DEBUG(10,("register_initial_vuid: allocated vuid = %u\n",
 198                 (unsigned int)sconn->smb1.sessions.next_vuid ));
 199
 200         vuser->vuid = sconn->smb1.sessions.next_vuid;
 201
 202         /*
 203          * This happens in an unfinished NTLMSSP session setup. We
 204          * need to allocate a vuid between the first and second calls
 205          * to NTLMSSP.
 206          */
 207         increment_next_vuid(&sconn->smb1.sessions.next_vuid);
 208         sconn->smb1.sessions.num_validated_vuids++;
 209
 210         DLIST_ADD(sconn->smb1.sessions.validated_users, vuser);
 211         return vuser->vuid;
 212 }
 213
 214 int register_homes_share(const char *username)
 215 {
 216         int result;
 217         struct passwd *pwd;
 218
 219         result = lp_servicenumber(username);
 220         if (result != -1) {
 221                 DEBUG(3, ("Using static (or previously created) service for "
 222                           "user '%s'; path = '%s'\n", username,
 223                           lp_pathname(result)));
 224                 return result;
 225         }
 226
 227         pwd = Get_Pwnam_alloc(talloc_tos(), username);
 228
 229         if ((pwd == NULL) || (pwd->pw_dir[0] == '\0')) {
 230                 DEBUG(3, ("No home directory defined for user '%s'\n",
 231                           username));
 232                 TALLOC_FREE(pwd);
 233                 return -1;
 234         }
 235
 236         DEBUG(3, ("Adding homes service for user '%s' using home directory: "
 237                   "'%s'\n", username, pwd->pw_dir));
 238
 239         result = add_home_service(username, username, pwd->pw_dir);
 240
 241         TALLOC_FREE(pwd);
 242         return result;
 243 }
 244
 245 /**
 246  *  register that a valid login has been performed, establish 'session'.
 247  *  @param session_info The token returned from the authentication process.
 248  *   (now 'owned' by register_existing_vuid)
 249  *
 250  *  @param session_key The User session key for the login session (now also
 251  *  'owned' by register_existing_vuid)
 252  *
 253  *  @param respose_blob The NT challenge-response, if available.  (May be
 254  *  freed after this call)
 255  *
 256  *  @param smb_name The untranslated name of the user
 257  *
 258  *  @return Newly allocated vuid, biased by an offset. (This allows us to
 259  *   tell random client vuid's (normally zero) from valid vuids.)
 260  *
 261  */
 262
 263 int register_existing_vuid(struct smbd_server_connection *sconn,
 264                         uint16 vuid,
 265                         struct auth_serversupplied_info *session_info,
 266                         DATA_BLOB response_blob,
 267                         const char *smb_name)
 268 {
 269         fstring tmp;
 270         user_struct *vuser;
 271
 272         vuser = get_partial_auth_user_struct(sconn, vuid);
 273         if (!vuser) {
 274                 goto fail;
 275         }
 276
 277         /* Use this to keep tabs on all our info from the authentication */
 278         vuser->session_info = talloc_move(vuser, &session_info);
 279
 280         /* This is a potentially untrusted username */
 281         alpha_strcpy(tmp, smb_name, ". _-$", sizeof(tmp));
 282
 283         vuser->session_info->sanitized_username = talloc_strdup(
 284                 vuser->session_info, tmp);
 285
 286         DEBUG(10,("register_existing_vuid: (%u,%u) %s %s %s guest=%d\n",
 287                   (unsigned int)vuser->session_info->utok.uid,
 288                   (unsigned int)vuser->session_info->utok.gid,
 289                   vuser->session_info->unix_name,
 290                   vuser->session_info->sanitized_username,
 291                   vuser->session_info->info3->base.domain.string,
 292                   vuser->session_info->guest ));
 293
 294         DEBUG(3, ("register_existing_vuid: User name: %s\t"
 295                   "Real name: %s\n", vuser->session_info->unix_name,
 296                   vuser->session_info->info3->base.full_name.string));
 297
 298         if (!vuser->session_info->security_token) {
 299                 DEBUG(1, ("register_existing_vuid: session_info does not "
 300                         "contain a user_token - cannot continue\n"));
 301                 goto fail;
 302         }
 303
 304         DEBUG(3,("register_existing_vuid: UNIX uid %d is UNIX user %s, "
 305                 "and will be vuid %u\n", (int)vuser->session_info->utok.uid,
 306                  vuser->session_info->unix_name, vuser->vuid));
 307
 308         if (!session_claim(sconn, vuser)) {
 309                 DEBUG(1, ("register_existing_vuid: Failed to claim session "
 310                         "for vuid=%d\n",
 311                         vuser->vuid));
 312                 goto fail;
 313         }
 314
 315         /* Register a home dir service for this user if
 316         (a) This is not a guest connection,
 317         (b) we have a home directory defined
 318         (c) there s not an existing static share by that name
 319         If a share exists by this name (autoloaded or not) reuse it . */
 320
 321         vuser->homes_snum = -1;
 322
 323         if (!vuser->session_info->guest) {
 324                 vuser->homes_snum = register_homes_share(
 325                         vuser->session_info->unix_name);
 326         }
 327
 328         if (srv_is_signing_negotiated(sconn) &&
 329             !vuser->session_info->guest) {
 330                 /* Try and turn on server signing on the first non-guest
 331                  * sessionsetup. */
 332                 srv_set_signing(sconn,
 333                                 vuser->session_info->user_session_key,
 334                                 response_blob);
 335         }
 336
 337         /* fill in the current_user_info struct */
 338         set_current_user_info(
 339                 vuser->session_info->sanitized_username,
 340                 vuser->session_info->unix_name,
 341                 vuser->session_info->info3->base.domain.string);
 342
 343         return vuser->vuid;
 344
 345   fail:
 346
 347         if (vuser) {
 348                 invalidate_vuid(sconn, vuid);
 349         }
 350         return UID_FIELD_INVALID;
 351 }
 352
 353 /****************************************************************************
 354  Add a name to the session users list.
 355 ****************************************************************************/
 356
 357 void add_session_user(struct smbd_server_connection *sconn,
 358                       const char *user)
 359 {
 360         struct passwd *pw;
 361         char *tmp;
 362
 363         pw = Get_Pwnam_alloc(talloc_tos(), user);
 364
 365         if (pw == NULL) {
 366                 return;
 367         }
 368
 369         if (sconn->smb1.sessions.session_userlist == NULL) {
 370                 sconn->smb1.sessions.session_userlist = SMB_STRDUP(pw->pw_name);
 371                 goto done;
 372         }
 373
 374         if (in_list(pw->pw_name,sconn->smb1.sessions.session_userlist,false)) {
 375                 goto done;
 376         }
 377
 378         if (strlen(sconn->smb1.sessions.session_userlist) > 128 * 1024) {
 379                 DEBUG(3,("add_session_user: session userlist already "
 380                          "too large.\n"));
 381                 goto done;
 382         }
 383
 384         if (asprintf(&tmp, "%s %s",
 385                      sconn->smb1.sessions.session_userlist, pw->pw_name) == -1) {
 386                 DEBUG(3, ("asprintf failed\n"));
 387                 goto done;
 388         }
 389
 390         SAFE_FREE(sconn->smb1.sessions.session_userlist);
 391         sconn->smb1.sessions.session_userlist = tmp;
 392  done:
 393         TALLOC_FREE(pw);
 394 }
 395
 396 /****************************************************************************
 397  In security=share mode we need to store the client workgroup, as that's
 398   what Vista uses for the NTLMv2 calculation.
 399 ****************************************************************************/
 400
 401 void add_session_workgroup(struct smbd_server_connection *sconn,
 402                            const char *workgroup)
 403 {
 404         if (sconn->smb1.sessions.session_workgroup) {
 405                 SAFE_FREE(sconn->smb1.sessions.session_workgroup);
 406         }
 407         sconn->smb1.sessions.session_workgroup = smb_xstrdup(workgroup);
 408 }
 409
 410 /****************************************************************************
 411  In security=share mode we need to return the client workgroup, as that's
 412   what Vista uses for the NTLMv2 calculation.
 413 ****************************************************************************/
 414
 415 const char *get_session_workgroup(struct smbd_server_connection *sconn)
 416 {
 417         return sconn->smb1.sessions.session_workgroup;
 418 }
 419
 420 /****************************************************************************
 421  Check if a username is valid.
 422 ****************************************************************************/
 423
 424 static bool user_ok(const char *user, int snum)
 425 {
 426         bool ret;
 427
 428         ret = True;
 429
 430         if (lp_invalid_users(snum)) {
 431                 char **invalid = str_list_copy(talloc_tos(),
 432                         lp_invalid_users(snum));
 433                 if (invalid &&
 434                     str_list_substitute(invalid, "%S", lp_servicename(snum))) {
 435
 436                         /* This is used in sec=share only, so no current user
 437                          * around to pass to str_list_sub_basic() */
 438
 439                         if ( invalid && str_list_sub_basic(invalid, "", "") ) {
 440                                 ret = !user_in_list(talloc_tos(), user,
 441                                                     (const char **)invalid);
 442                         }
 443                 }
 444                 TALLOC_FREE(invalid);
 445         }
 446
 447         if (ret && lp_valid_users(snum)) {
 448                 char **valid = str_list_copy(talloc_tos(),
 449                         lp_valid_users(snum));
 450                 if ( valid &&
 451                      str_list_substitute(valid, "%S", lp_servicename(snum)) ) {
 452
 453                         /* This is used in sec=share only, so no current user
 454                          * around to pass to str_list_sub_basic() */
 455
 456                         if ( valid && str_list_sub_basic(valid, "", "") ) {
 457                                 ret = user_in_list(talloc_tos(), user,
 458                                                    (const char **)valid);
 459                         }
 460                 }
 461                 TALLOC_FREE(valid);
 462         }
 463
 464         if (ret && lp_onlyuser(snum)) {
 465                 char **user_list = str_list_make_v3(
 466                         talloc_tos(), lp_username(snum), NULL);
 467                 if (user_list &&
 468                     str_list_substitute(user_list, "%S",
 469                                         lp_servicename(snum))) {
 470                         ret = user_in_list(talloc_tos(), user,
 471                                            (const char **)user_list);
 472                 }
 473                 TALLOC_FREE(user_list);
 474         }
 475
 476         return(ret);
 477 }
 478
 479 /****************************************************************************
 480  Validate a group username entry. Return the username or NULL.
 481 ****************************************************************************/
 482
 483 static char *validate_group(struct smbd_server_connection *sconn,
 484                             char *group, DATA_BLOB password,int snum)
 485 {
 486 #ifdef HAVE_NETGROUP
 487         {
 488                 char *host, *user, *domain;
 489                 struct auth_context *actx = sconn->smb1.negprot.auth_context;
 490                 bool enc = sconn->smb1.negprot.encrypted_passwords;
 491                 setnetgrent(group);
 492                 while (getnetgrent(&host, &user, &domain)) {
 493                         if (user) {
 494                                 if (user_ok(user, snum) &&
 495                                     password_ok(actx, enc,
 496                                                 get_session_workgroup(sconn),
 497                                                 user,password)) {
 498                                         endnetgrent();
 499                                         return(user);
 500                                 }
 501                         }
 502                 }
 503                 endnetgrent();
 504         }
 505 #endif
 506
 507 #ifdef HAVE_GETGRENT
 508         {
 509                 struct group *gptr;
 510                 struct auth_context *actx = sconn->smb1.negprot.auth_context;
 511                 bool enc = sconn->smb1.negprot.encrypted_passwords;
 512
 513                 setgrent();
 514                 while ((gptr = (struct group *)getgrent())) {
 515                         if (strequal(gptr->gr_name,group))
 516                                 break;
 517                 }
 518
 519                 /*
 520                  * As user_ok can recurse doing a getgrent(), we must
 521                  * copy the member list onto the heap before
 522                  * use. Bug pointed out by leon@eatworms.swmed.edu.
 523                  */
 524
 525                 if (gptr) {
 526                         char *member_list = NULL;
 527                         size_t list_len = 0;
 528                         char *member;
 529                         int i;
 530
 531                         for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
 532                                 list_len += strlen(gptr->gr_mem[i])+1;
 533                         }
 534                         list_len++;
 535
 536                         member_list = (char *)SMB_MALLOC(list_len);
 537                         if (!member_list) {
 538                                 endgrent();
 539                                 return NULL;
 540                         }
 541
 542                         *member_list = '\0';
 543                         member = member_list;
 544
 545                         for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
 546                                 size_t member_len = strlen(gptr->gr_mem[i])+1;
 547
 548                                 DEBUG(10,("validate_group: = gr_mem = "
 549                                           "%s\n", gptr->gr_mem[i]));
 550
 551                                 safe_strcpy(member, gptr->gr_mem[i],
 552                                         list_len - (member-member_list));
 553                                 member += member_len;
 554                         }
 555
 556                         endgrent();
 557
 558                         member = member_list;
 559                         while (*member) {
 560                                 if (user_ok(member,snum) &&
 561                                     password_ok(actx, enc,
 562                                                 get_session_workgroup(sconn),
 563                                                 member,password)) {
 564                                         char *name = talloc_strdup(talloc_tos(),
 565                                                                 member);
 566                                         SAFE_FREE(member_list);
 567                                         return name;
 568                                 }
 569
 570                                 DEBUG(10,("validate_group = member = %s\n",
 571                                           member));
 572
 573                                 member += strlen(member) + 1;
 574                         }
 575
 576                         SAFE_FREE(member_list);
 577                 } else {
 578                         endgrent();
 579                         return NULL;
 580                 }
 581         }
 582 #endif
 583         return(NULL);
 584 }
 585
 586 /****************************************************************************
 587  Check for authority to login to a service with a given username/password.
 588  Note this is *NOT* used when logging on using sessionsetup_and_X.
 589 ****************************************************************************/
 590
 591 bool authorise_login(struct smbd_server_connection *sconn,
 592                      int snum, fstring user, DATA_BLOB password,
 593                      bool *guest)
 594 {
 595         bool ok = False;
 596         struct auth_context *actx = sconn->smb1.negprot.auth_context;
 597         bool enc = sconn->smb1.negprot.encrypted_passwords;
 598
 599 #ifdef DEBUG_PASSWORD
 600         DEBUG(100,("authorise_login: checking authorisation on "
 601                    "user=%s pass=%s\n", user,password.data));
 602 #endif
 603
 604         *guest = False;
 605
 606         /* there are several possibilities:
 607                 1) login as the given user with given password
 608                 2) login as a previously registered username with the given
 609                    password
 610                 3) login as a session list username with the given password
 611                 4) login as a previously validated user/password pair
 612                 5) login as the "user =" user with given password
 613                 6) login as the "user =" user with no password
 614                    (guest connection)
 615                 7) login as guest user with no password
 616
 617                 if the service is guest_only then steps 1 to 5 are skipped
 618         */
 619
 620         /* now check the list of session users */
 621         if (!ok) {
 622                 char *auser;
 623                 char *user_list = NULL;
 624                 char *saveptr;
 625
 626                 if (sconn->smb1.sessions.session_userlist)
 627                         user_list = SMB_STRDUP(sconn->smb1.sessions.session_userlist);
 628                 else
 629                         user_list = SMB_STRDUP("");
 630
 631                 if (!user_list)
 632                         return(False);
 633
 634                 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
 635                      !ok && auser;
 636                      auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
 637                         fstring user2;
 638                         fstrcpy(user2,auser);
 639                         if (!user_ok(user2,snum))
 640                                 continue;
 641
 642                         if (password_ok(actx, enc,
 643                                         get_session_workgroup(sconn),
 644                                         user2,password)) {
 645                                 ok = True;
 646                                 fstrcpy(user,user2);
 647                                 DEBUG(3,("authorise_login: ACCEPTED: session "
 648                                          "list username (%s) and given "
 649                                          "password ok\n", user));
 650                         }
 651                 }
 652
 653                 SAFE_FREE(user_list);
 654         }
 655
 656         /* check the user= fields and the given password */
 657         if (!ok && lp_username(snum)) {
 658                 TALLOC_CTX *ctx = talloc_tos();
 659                 char *auser;
 660                 char *user_list = talloc_strdup(ctx, lp_username(snum));
 661                 char *saveptr;
 662
 663                 if (!user_list) {
 664                         goto check_guest;
 665                 }
 666
 667                 user_list = talloc_string_sub(ctx,
 668                                 user_list,
 669                                 "%S",
 670                                 lp_servicename(snum));
 671
 672                 if (!user_list) {
 673                         goto check_guest;
 674                 }
 675
 676                 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
 677                      auser && !ok;
 678                      auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
 679                         if (*auser == '@') {
 680                                 auser = validate_group(sconn,auser+1,
 681                                                        password,snum);
 682                                 if (auser) {
 683                                         ok = True;
 684                                         fstrcpy(user,auser);
 685                                         DEBUG(3,("authorise_login: ACCEPTED: "
 686                                                  "group username and given "
 687                                                  "password ok (%s)\n", user));
 688                                 }
 689                         } else {
 690                                 fstring user2;
 691                                 fstrcpy(user2,auser);
 692                                 if (user_ok(user2,snum) &&
 693                                     password_ok(actx, enc,
 694                                                 get_session_workgroup(sconn),
 695                                                 user2,password)) {
 696                                         ok = True;
 697                                         fstrcpy(user,user2);
 698                                         DEBUG(3,("authorise_login: ACCEPTED: "
 699                                                  "user list username and "
 700                                                  "given password ok (%s)\n",
 701                                                  user));
 702                                 }
 703                         }
 704                 }
 705         }
 706
 707   check_guest:
 708
 709         /* check for a normal guest connection */
 710         if (!ok && GUEST_OK(snum)) {
 711                 struct passwd *guest_pw;
 712                 fstring guestname;
 713                 fstrcpy(guestname,lp_guestaccount());
 714                 guest_pw = Get_Pwnam_alloc(talloc_tos(), guestname);
 715                 if (guest_pw != NULL) {
 716                         fstrcpy(user,guestname);
 717                         ok = True;
 718                         DEBUG(3,("authorise_login: ACCEPTED: guest account "
 719                                  "and guest ok (%s)\n", user));
 720                 } else {
 721                         DEBUG(0,("authorise_login: Invalid guest account "
 722                                  "%s??\n",guestname));
 723                 }
 724                 TALLOC_FREE(guest_pw);
 725                 *guest = True;
 726         }
 727
 728         if (ok && !user_ok(user, snum)) {
 729                 DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
 730                 ok = False;
 731         }
 732
 733         return(ok);
 734 }