source3/utils/smbpasswd.c

   1 /*
   2  * Unix SMB/Netbios implementation.
   3  * Version 1.9.
   4  * smbpasswd module.
   5  * Copyright (C) Jeremy Allison 1995-1998
   6  * Copyright (C) Tim Potter     2001
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along with
  19  * this program; if not, write to the Free Software Foundation, Inc., 675
  20  * Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include "includes.h"
  23
  24 extern pstring global_myname;
  25 extern int DEBUGLEVEL;
  26
  27 /*
  28  * Next two lines needed for SunOS and don't
  29  * hurt anything else...
  30  */
  31 extern char *optarg;
  32 extern int optind;
  33
  34 /* forced running in root-mode */
  35 static BOOL local_mode;
  36
  37 /*********************************************************
  38 a strdup with exit
  39 **********************************************************/
  40 static char *xstrdup(char *s)
  41 {
  42         s = strdup(s);
  43         if (!s) {
  44                 fprintf(stderr,"out of memory\n");
  45                 exit(1);
  46         }
  47         return s;
  48 }
  49
  50
  51 /*********************************************************
  52  Print command usage on stderr and die.
  53 **********************************************************/
  54 static void usage(void)
  55 {
  56         if (getuid() == 0) {
  57                 printf("smbpasswd [options] [username] [password]\n");
  58         } else {
  59                 printf("smbpasswd [options] [password]\n");
  60         }
  61         printf("options:\n");
  62         printf("  -s                   use stdin for password prompt\n");
  63         printf("  -D LEVEL             debug level\n");
  64         printf("  -U USER              remote username\n");
  65         printf("  -r MACHINE           remote machine\n");
  66
  67         if (getuid() == 0 || local_mode) {
  68                 printf("  -L                   local mode (must be first option)\n");
  69                 printf("  -R ORDER             name resolve order\n");
  70                 printf("  -j DOMAIN            join domain name\n");
  71                 printf("  -a                   add user\n");
  72                 printf("  -x                   delete user\n");
  73                 printf("  -d                   disable user\n");
  74                 printf("  -e                   enable user\n");
  75                 printf("  -n                   set no password\n");
  76                 printf("  -m                   machine trust account\n");
  77         }
  78         exit(1);
  79 }
  80
  81 /*********************************************************
  82 Join a domain.
  83 **********************************************************/
  84 static int join_domain(char *domain, char *remote)
  85 {
  86         pstring remote_machine;
  87         fstring trust_passwd;
  88         unsigned char orig_trust_passwd_hash[16];
  89         BOOL ret;
  90
  91         pstrcpy(remote_machine, remote ? remote : "");
  92         fstrcpy(trust_passwd, global_myname);
  93         strlower(trust_passwd);
  94         E_md4hash( (uchar *)trust_passwd, orig_trust_passwd_hash);
  95
  96         /* Ensure that we are not trying to join a
  97            domain if we are locally set up as a domain
  98            controller. */
  99
 100         if(strequal(remote, global_myname)) {
 101                 fprintf(stderr, "Cannot join domain %s as the domain controller name is our own. We cannot be a domain controller for a domain and also be a domain member.\n", domain);
 102                 return 1;
 103         }
 104
 105         /*
 106          * Write the old machine account password.
 107          */
 108
 109         if(!secrets_store_trust_account_password(domain,  orig_trust_passwd_hash)) {
 110                 fprintf(stderr, "Unable to write the machine account password for \
 111 machine %s in domain %s.\n", global_myname, domain);
 112                 return 1;
 113         }
 114
 115         /*
 116          * If we are given a remote machine assume this is the PDC.
 117          */
 118
 119         if(remote == NULL) {
 120                 pstrcpy(remote_machine, lp_passwordserver());
 121         }
 122
 123         if(!*remote_machine) {
 124                 fprintf(stderr, "No password server list given in smb.conf - \
 125 unable to join domain.\n");
 126                 return 1;
 127         }
 128
 129         ret = change_trust_account_password( domain, remote_machine);
 130
 131         if(!ret) {
 132                 trust_password_delete(domain);
 133                 fprintf(stderr,"Unable to join domain %s.\n",domain);
 134         } else {
 135                 printf("Joined domain %s.\n",domain);
 136         }
 137
 138         return (int)ret;
 139 }
 140
 141 /* Initialise client credentials for authenticated pipe access */
 142
 143 void init_rpcclient_creds(struct ntuser_creds *creds, char* username,
 144                           char* domain, char* password)
 145 {
 146         ZERO_STRUCTP(creds);
 147
 148         if (lp_encrypted_passwords()) {
 149                 pwd_make_lm_nt_16(&creds->pwd, password);
 150         } else {
 151                 pwd_set_cleartext(&creds->pwd, password);
 152         }
 153
 154         fstrcpy(creds->user_name, username);
 155         fstrcpy(creds->domain, domain);
 156 }
 157
 158 /*********************************************************
 159 Join a domain using the administrator username and password
 160 **********************************************************/
 161
 162 /* Macro for checking RPC error codes to make things more readable */
 163
 164 #define CHECK_RPC_ERR(rpc, msg) \
 165         if ((result = rpc) != NT_STATUS_OK) { \
 166                 DEBUG(0, (msg ": %s\n", get_nt_error_msg(result))); \
 167                 goto done; \
 168         }
 169
 170 #define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
 171         if ((result = rpc) != NT_STATUS_OK) { \
 172                 DEBUG(0, debug_args); \
 173                 goto done; \
 174         }
 175
 176 static int join_domain_byuser(char *domain, char *remote_machine,
 177                               char *username, char *password)
 178 {
 179         /* libsmb variables */
 180
 181         struct nmb_name calling, called;
 182         struct ntuser_creds creds;
 183         struct cli_state cli;
 184         fstring dest_host, acct_name;
 185         struct in_addr dest_ip;
 186         TALLOC_CTX *mem_ctx;
 187
 188         /* rpc variables */
 189
 190         POLICY_HND lsa_pol, sam_pol, domain_pol, user_pol;
 191         DOM_SID domain_sid;
 192         uint32 user_rid;
 193
 194         /* Password stuff */
 195
 196         char *machine_pwd;
 197         int plen = 0;
 198         uchar pwbuf[516], ntpw[16], sess_key[16];
 199         SAM_USERINFO_CTR ctr;
 200         SAM_USER_INFO_24 p24;
 201         SAM_USER_INFO_10 p10;
 202
 203         /* Misc */
 204
 205         uint32 result;
 206         int retval = 1;
 207
 208         /* Connect to remote machine */
 209
 210         ZERO_STRUCT(cli);
 211         ZERO_STRUCT(creds);
 212
 213         if (!(mem_ctx = talloc_init())) {
 214                 DEBUG(0, ("Could not initialise talloc context\n"));
 215                 goto done;
 216         }
 217
 218         if (!cli_initialise(&cli)) {
 219                 DEBUG(0, ("Could not initialise client structure\n"));
 220                 goto done;
 221         }
 222
 223         init_rpcclient_creds(&creds, username, domain, password);
 224         cli_init_creds(&cli, &creds);
 225
 226         if (!resolve_srv_name(remote_machine, dest_host, &dest_ip)) {
 227                 DEBUG(0, ("Could not resolve name %s\n", remote_machine));
 228                 goto done;
 229         }
 230
 231         make_nmb_name(&called, dns_to_netbios_name(dest_host), 0x20);
 232         make_nmb_name(&calling, dns_to_netbios_name(global_myname), 0);
 233
 234         if (!cli_establish_connection(&cli, dest_host, &dest_ip, &calling,
 235                                       &called, "IPC$", "IPC", False, True)) {
 236                 DEBUG(0, ("Error connecting to %s\n", dest_host));
 237                 goto done;
 238         }
 239
 240         /* Fetch domain sid */
 241
 242         if (!cli_nt_session_open(&cli, PIPE_LSARPC)) {
 243                 DEBUG(0, ("Error connecting to SAM pipe\n"));
 244                 goto done;
 245         }
 246
 247
 248         CHECK_RPC_ERR(cli_lsa_open_policy(&cli, mem_ctx, True,
 249                                           SEC_RIGHTS_MAXIMUM_ALLOWED,
 250                                           &lsa_pol),
 251                       "error opening lsa policy handle");
 252
 253         CHECK_RPC_ERR(cli_lsa_query_info_policy(&cli, mem_ctx, &lsa_pol,
 254                                                 5, domain, &domain_sid),
 255                       "error querying info policy");
 256
 257         cli_lsa_close(&cli, mem_ctx, &lsa_pol);
 258
 259         cli_nt_session_close(&cli); /* Done with this pipe */
 260
 261         /* Create domain user */
 262
 263         if (!cli_nt_session_open(&cli, PIPE_SAMR)) {
 264                 DEBUG(0, ("Error connecting to SAM pipe\n"));
 265                 goto done;
 266         }
 267
 268         CHECK_RPC_ERR(cli_samr_connect(&cli, mem_ctx,
 269                                        SEC_RIGHTS_MAXIMUM_ALLOWED,
 270                                        &sam_pol),
 271                       "could not connect to SAM database");
 272
 273
 274         CHECK_RPC_ERR(cli_samr_open_domain(&cli, mem_ctx, &sam_pol,
 275                                            SEC_RIGHTS_MAXIMUM_ALLOWED,
 276                                            &domain_sid, &domain_pol),
 277                       "could not open domain");
 278
 279         /* Create domain user */
 280
 281         fstrcpy(acct_name, global_myname);
 282         fstrcat(acct_name, "$");
 283
 284         strlower(acct_name);
 285
 286         {
 287                 uint32 unknown = 0xe005000b;
 288
 289                 result = cli_samr_create_dom_user(&cli, mem_ctx, &domain_pol,
 290                                                   acct_name, ACB_WSTRUST,
 291                                                   unknown, &user_pol,
 292                                                   &user_rid);
 293
 294                 /* We *must* do this.... don't ask... */
 295
 296                 CHECK_RPC_ERR_DEBUG(cli_samr_close(&cli, mem_ctx, &user_pol), ("error closing user policy"));
 297                 result = NT_STATUS_USER_EXISTS;
 298         }
 299
 300         if (result == NT_STATUS_USER_EXISTS) {
 301                 uint32 num_rids, *name_types, *user_rids;
 302                 uint32 flags = 0x3e8;
 303                 char *names;
 304
 305                 /* Look up existing rid */
 306
 307                 names = (char *)&acct_name[0];
 308
 309                 CHECK_RPC_ERR_DEBUG(
 310                         cli_samr_lookup_names(&cli, mem_ctx,
 311                                               &domain_pol, flags,
 312                                               1, &names, &num_rids,
 313                                               &user_rids, &name_types),
 314                         ("error looking up rid for user %s: %s\n",
 315                          acct_name, get_nt_error_msg(result)));
 316
 317                 if (name_types[0] != SID_NAME_USER) {
 318                         DEBUG(0, ("%s is not a user account\n", acct_name));
 319                         goto done;
 320                 }
 321
 322                 user_rid = user_rids[0];
 323
 324                 /* Open handle on user */
 325
 326                 CHECK_RPC_ERR_DEBUG(
 327                         cli_samr_open_user(&cli, mem_ctx, &domain_pol,
 328                                            SEC_RIGHTS_MAXIMUM_ALLOWED,
 329                                            user_rid, &user_pol),
 330                         ("could not re-open existing user %s: %s\n",
 331                          acct_name, get_nt_error_msg(result)));
 332
 333         } else if (result != NT_STATUS_OK) {
 334                 DEBUG(0, ("error creating domain user: %s\n",
 335                           get_nt_error_msg(result)));
 336                 goto done;
 337         }
 338
 339         /* Create a random machine account password */
 340
 341         {
 342                 UNISTR2 upw;    /* Unicode password */
 343
 344                 upw.buffer = (uint16 *)talloc_zero(mem_ctx, 0xc *
 345                                                    sizeof(uint16));
 346
 347                 upw.uni_str_len = 0xc;
 348                 upw.uni_max_len = 0xc;
 349
 350                 machine_pwd = (char *)upw.buffer;
 351                 plen = upw.uni_str_len * 2;
 352                 generate_random_buffer((unsigned char *)machine_pwd, plen, True);
 353
 354                 encode_pw_buffer((char *)pwbuf, machine_pwd, plen, False);
 355
 356                 nt_owf_genW(&upw, ntpw);
 357         }
 358
 359         /* Set password on machine account */
 360
 361         ZERO_STRUCT(ctr);
 362         ZERO_STRUCT(p24);
 363
 364         init_sam_user_info24(&p24, (char *)pwbuf,24);
 365
 366         ctr.switch_value = 24;
 367         ctr.info.id24 = &p24;
 368
 369         /* I don't think this is quite the right place for this
 370            calculation.  It should be moved somewhere where the credentials
 371            are calculated. )-: */
 372
 373         mdfour(sess_key, cli.pwd.smb_nt_pwd, 16);
 374
 375         CHECK_RPC_ERR(cli_samr_set_userinfo(&cli, mem_ctx, &user_pol, 24,
 376                                             sess_key, &ctr),
 377                       "error setting trust account password");
 378
 379         /* Why do we have to try to (re-)set the ACB to be the same as what
 380            we passed in the samr_create_dom_user() call?  When a NT
 381            workstation is joined to a domain by an administrator the
 382            acb_info is set to 0x80.  For a normal user with "Add
 383            workstations to the domain" rights the acb_info is 0x84.  I'm
 384            not sure whether it is supposed to make a difference or not.  NT
 385            seems to cope with either value so don't bomb out if the set
 386            userinfo2 level 0x10 fails.  -tpot */
 387
 388         ZERO_STRUCT(ctr);
 389         ctr.switch_value = 0x10;
 390         ctr.info.id10 = &p10;
 391
 392         init_sam_user_info10(&p10, ACB_WSTRUST);
 393
 394         /* Ignoring the return value is necessary for joining a domain
 395            as a normal user with "Add workstation to domain" privilege. */
 396
 397         result = cli_samr_set_userinfo2(&cli, mem_ctx, &user_pol, 0x10,
 398                                         sess_key, &ctr);
 399
 400         /* Now store the secret in the secrets database */
 401
 402         strupper(domain);
 403
 404         if (!secrets_store_domain_sid(domain, &domain_sid) ||
 405             !secrets_store_trust_account_password(domain, ntpw)) {
 406                 DEBUG(0, ("error storing domain secrets\n"));
 407                 goto done;
 408         }
 409
 410         retval = 0;             /* Success! */
 411
 412  done:
 413         /* Close down pipe - this will clean up open policy handles */
 414
 415         if (cli.nt_pipe_fnum)
 416                 cli_nt_session_close(&cli);
 417
 418         /* Display success or failure */
 419
 420         if (retval != 0) {
 421                 trust_password_delete(domain);
 422                 fprintf(stderr,"Unable to join domain %s.\n",domain);
 423         } else {
 424                 printf("Joined domain %s.\n",domain);
 425         }
 426
 427         return retval;
 428 }
 429
 430 static void set_line_buffering(FILE *f)
 431 {
 432         setvbuf(f, NULL, _IOLBF, 0);
 433 }
 434
 435 /*************************************************************
 436  Utility function to prompt for passwords from stdin. Each
 437  password entered must end with a newline.
 438 *************************************************************/
 439 static char *stdin_new_passwd(void)
 440 {
 441         static fstring new_passwd;
 442         size_t len;
 443
 444         ZERO_ARRAY(new_passwd);
 445
 446         /*
 447          * if no error is reported from fgets() and string at least contains
 448          * the newline that ends the password, then replace the newline with
 449          * a null terminator.
 450          */
 451         if ( fgets(new_passwd, sizeof(new_passwd), stdin) != NULL) {
 452                 if ((len = strlen(new_passwd)) > 0) {
 453                         if(new_passwd[len-1] == '\n')
 454                                 new_passwd[len - 1] = 0;
 455                 }
 456         }
 457         return(new_passwd);
 458 }
 459
 460
 461 /*************************************************************
 462  Utility function to get passwords via tty or stdin
 463  Used if the '-s' option is set to silently get passwords
 464  to enable scripting.
 465 *************************************************************/
 466 static char *get_pass( char *prompt, BOOL stdin_get)
 467 {
 468         char *p;
 469         if (stdin_get) {
 470                 p = stdin_new_passwd();
 471         } else {
 472                 p = getpass(prompt);
 473         }
 474         return xstrdup(p);
 475 }
 476
 477 /*************************************************************
 478  Utility function to prompt for new password.
 479 *************************************************************/
 480 static char *prompt_for_new_password(BOOL stdin_get)
 481 {
 482         char *p;
 483         fstring new_passwd;
 484
 485         ZERO_ARRAY(new_passwd);
 486
 487         p = get_pass("New SMB password:", stdin_get);
 488
 489         fstrcpy(new_passwd, p);
 490         safe_free(p);
 491
 492         p = get_pass("Retype new SMB password:", stdin_get);
 493
 494         if (strcmp(p, new_passwd)) {
 495                 fprintf(stderr, "Mismatch - password unchanged.\n");
 496                 ZERO_ARRAY(new_passwd);
 497                 safe_free(p);
 498                 return NULL;
 499         }
 500
 501         return p;
 502 }
 503
 504
 505 /*************************************************************
 506  Change a password either locally or remotely.
 507 *************************************************************/
 508
 509 static BOOL password_change(const char *remote_machine, char *user_name,
 510                             char *old_passwd, char *new_passwd, int local_flags)
 511 {
 512         BOOL ret;
 513         pstring err_str;
 514         pstring msg_str;
 515
 516         if (remote_machine != NULL) {
 517                 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
 518                                                         LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
 519                         /* these things can't be done remotely yet */
 520                         return False;
 521                 }
 522                 ret = remote_password_change(remote_machine, user_name,
 523                                                                          old_passwd, new_passwd, err_str, sizeof(err_str));
 524                 if(*err_str)
 525                         fprintf(stderr, err_str);
 526                 return ret;
 527         }
 528
 529         ret = local_password_change(user_name, local_flags, new_passwd,
 530                                      err_str, sizeof(err_str), msg_str, sizeof(msg_str));
 531
 532         if(*msg_str)
 533                 printf(msg_str);
 534         if(*err_str)
 535                 fprintf(stderr, err_str);
 536
 537         return ret;
 538 }
 539
 540
 541 /*************************************************************
 542  Handle password changing for root.
 543 *************************************************************/
 544
 545 static int process_root(int argc, char *argv[])
 546 {
 547         struct passwd  *pwd;
 548         int result = 0, ch;
 549         BOOL joining_domain = False, got_pass = False;
 550         int local_flags = 0;
 551         BOOL stdin_passwd_get = False;
 552         fstring user_name, user_password;
 553         char *new_domain = NULL;
 554         char *new_passwd = NULL;
 555         char *old_passwd = NULL;
 556         char *remote_machine = NULL;
 557
 558         ZERO_STRUCT(user_name);
 559         ZERO_STRUCT(user_password);
 560
 561         user_name[0] = '\0';
 562
 563         while ((ch = getopt(argc, argv, "ax:d:e:hmnj:r:sR:D:U:L")) != EOF) {
 564                 switch(ch) {
 565                 case 'L':
 566                         local_mode = True;
 567                         break;
 568                 case 'a':
 569                         local_flags |= LOCAL_ADD_USER;
 570                         break;
 571                 case 'x':
 572                         local_flags |= LOCAL_DELETE_USER;
 573                         fstrcpy(user_name, optarg);
 574                         new_passwd = xstrdup("XXXXXX");
 575                         break;
 576                 case 'd':
 577                         local_flags |= LOCAL_DISABLE_USER;
 578                         fstrcpy(user_name, optarg);
 579                         new_passwd = xstrdup("XXXXXX");
 580                         break;
 581                 case 'e':
 582                         local_flags |= LOCAL_ENABLE_USER;
 583                         fstrcpy(user_name, optarg);
 584                         break;
 585                 case 'm':
 586                         local_flags |= LOCAL_TRUST_ACCOUNT;
 587                         break;
 588                 case 'n':
 589                         local_flags |= LOCAL_SET_NO_PASSWORD;
 590                         new_passwd = xstrdup("NO PASSWORD");
 591                         break;
 592                 case 'j':
 593                         new_domain = optarg;
 594                         strupper(new_domain);
 595                         joining_domain = True;
 596                         break;
 597                 case 'r':
 598                         remote_machine = optarg;
 599                         break;
 600                 case 's':
 601                         set_line_buffering(stdin);
 602                         set_line_buffering(stdout);
 603                         set_line_buffering(stderr);
 604                         stdin_passwd_get = True;
 605                         break;
 606                 case 'R':
 607                         lp_set_name_resolve_order(optarg);
 608                         break;
 609                 case 'D':
 610                         DEBUGLEVEL = atoi(optarg);
 611                         break;
 612                 case 'U': {
 613                         char *lp;
 614
 615                         fstrcpy(user_name, optarg);
 616
 617                         if ((lp = strchr_m(user_name, '%'))) {
 618                                 *lp = 0;
 619                                 fstrcpy(user_password, lp + 1);
 620                                 got_pass = True;
 621                                 memset(strchr_m(optarg, '%') + 1, 'X',
 622                                        strlen(user_password));
 623                         }
 624
 625                         break;
 626                 }
 627                 case 'h':
 628                 default:
 629                         usage();
 630                 }
 631         }
 632
 633         argc -= optind;
 634         argv += optind;
 635
 636         /*
 637          * Ensure both add/delete user are not set
 638          * Ensure add/delete user and either remote machine or join domain are
 639          * not both set.
 640          */
 641         if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
 642            ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
 643                 ((remote_machine != NULL) || joining_domain))) {
 644                 usage();
 645         }
 646
 647         /* Only load interfaces if we are doing network operations. */
 648
 649         if (joining_domain || remote_machine) {
 650                 load_interfaces();
 651         }
 652
 653         /* Join a domain */
 654
 655         if (joining_domain) {
 656
 657                 if (argc != 0)
 658                         usage();
 659
 660                 /* Are we joining by specifing an admin username and
 661                    password? */
 662
 663                 if (user_name[0]) {
 664
 665                         /* Get administrator password if not specified */
 666
 667                         if (!got_pass) {
 668                                 char *pass = getpass("Password: ");
 669
 670                                 if (pass)
 671                                         pstrcpy(user_password, pass);
 672                         }
 673
 674                         return join_domain_byuser(new_domain, remote_machine,
 675                                                   user_name, user_password);
 676                 } else {
 677
 678                         /* Or just with the server manager? */
 679
 680                         return join_domain(new_domain, remote_machine);
 681                 }
 682         }
 683
 684         /*
 685          * Deal with root - can add a user, but only locally.
 686          */
 687
 688         switch(argc) {
 689         case 0:
 690                 fstrcpy(user_name, "");
 691                 break;
 692         case 1:
 693                 fstrcpy(user_name, argv[0]);
 694                 break;
 695         case 2:
 696                 fstrcpy(user_name, argv[0]);
 697                 new_passwd = xstrdup(argv[1]);
 698                 break;
 699         default:
 700                 usage();
 701         }
 702
 703         if (!user_name[0] && (pwd = sys_getpwuid(0))) {
 704                 fstrcpy(user_name, pwd->pw_name);
 705         }
 706
 707         if (!user_name[0]) {
 708                 fprintf(stderr,"You must specify a username\n");
 709                 exit(1);
 710         }
 711
 712         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 713                 /* add the $ automatically */
 714                 static fstring buf;
 715
 716                 /*
 717                  * Remove any trailing '$' before we
 718                  * generate the initial machine password.
 719                  */
 720
 721                 if (user_name[strlen(user_name)-1] == '$') {
 722                         user_name[strlen(user_name)-1] = 0;
 723                 }
 724
 725                 if (local_flags & LOCAL_ADD_USER) {
 726                         safe_free(new_passwd);
 727                         new_passwd = xstrdup(user_name);
 728                         strlower(new_passwd);
 729                 }
 730
 731                 /*
 732                  * Now ensure the username ends in '$' for
 733                  * the machine add.
 734                  */
 735
 736                 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
 737                 fstrcpy(user_name, buf);
 738         }
 739
 740         if (remote_machine != NULL) {
 741                 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
 742         }
 743
 744         if (!new_passwd) {
 745
 746                 /*
 747                  * If we are trying to enable a user, first we need to find out
 748                  * if they are using a modern version of the smbpasswd file that
 749                  * disables a user by just writing a flag into the file. If so
 750                  * then we can re-enable a user without prompting for a new
 751                  * password. If not (ie. they have a no stored password in the
 752                  * smbpasswd file) then we need to prompt for a new password.
 753                  */
 754
 755                 if(local_flags & LOCAL_ENABLE_USER) {
 756                         SAM_ACCOUNT *sampass = NULL;
 757                         BOOL ret;
 758
 759                         pdb_init_sam(&sampass);
 760                         ret = pdb_getsampwnam(sampass, user_name);
 761                         if((sampass != False) && (pdb_get_lanman_passwd(sampass) != NULL)) {
 762                                 new_passwd = xstrdup("XXXX"); /* Don't care. */
 763                         }
 764                         pdb_free_sam(sampass);
 765                 }
 766
 767                 if(!new_passwd)
 768                         new_passwd = prompt_for_new_password(stdin_passwd_get);
 769
 770                 if(!new_passwd) {
 771                         fprintf(stderr, "Unable to get new password.\n");
 772                         exit(1);
 773                 }
 774         }
 775
 776         if (!password_change(remote_machine, user_name, old_passwd, new_passwd, local_flags)) {
 777                 fprintf(stderr,"Failed to modify password entry for user %s\n", user_name);
 778                 result = 1;
 779                 goto done;
 780         }
 781
 782         if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD))) {
 783                 SAM_ACCOUNT *sampass = NULL;
 784                 BOOL ret;
 785
 786                 pdb_init_sam(&sampass);
 787                 ret = pdb_getsampwnam(sampass, user_name);
 788
 789                 printf("Password changed for user %s.", user_name );
 790                 if( (ret != False) && (pdb_get_acct_ctrl(sampass)&ACB_DISABLED) )
 791                         printf(" User has disabled flag set.");
 792                 if((ret != False) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) )
 793                         printf(" User has no password flag set.");
 794                 printf("\n");
 795                 pdb_free_sam(sampass);
 796         }
 797
 798  done:
 799         safe_free(new_passwd);
 800         return result;
 801 }
 802
 803
 804 /*************************************************************
 805 handle password changing for non-root
 806 *************************************************************/
 807 static int process_nonroot(int argc, char *argv[])
 808 {
 809         struct passwd  *pwd = NULL;
 810         int result = 0, ch;
 811         BOOL stdin_passwd_get = False;
 812         char *old_passwd = NULL;
 813         char *remote_machine = NULL;
 814         char *user_name = NULL;
 815         char *new_passwd = NULL;
 816
 817         while ((ch = getopt(argc, argv, "hD:r:sU:")) != EOF) {
 818                 switch(ch) {
 819                 case 'D':
 820                         DEBUGLEVEL = atoi(optarg);
 821                         break;
 822                 case 'r':
 823                         remote_machine = optarg;
 824                         break;
 825                 case 's':
 826                         set_line_buffering(stdin);
 827                         set_line_buffering(stdout);
 828                         set_line_buffering(stderr);
 829                         stdin_passwd_get = True;
 830                         break;
 831                 case 'U':
 832                         user_name = optarg;
 833                         break;
 834                 default:
 835                         usage();
 836                 }
 837         }
 838
 839         argc -= optind;
 840         argv += optind;
 841
 842         if(argc > 1) {
 843                 usage();
 844         }
 845
 846         if (argc == 1) {
 847                 new_passwd = argv[0];
 848         }
 849
 850         if (!user_name) {
 851                 pwd = sys_getpwuid(getuid());
 852                 if (pwd) {
 853                         user_name = xstrdup(pwd->pw_name);
 854                 } else {
 855                         fprintf(stderr,"you don't exist - go away\n");
 856                         exit(1);
 857                 }
 858         }
 859
 860         /*
 861          * A non-root user is always setting a password
 862          * via a remote machine (even if that machine is
 863          * localhost).
 864          */
 865
 866         load_interfaces(); /* Delayed from main() */
 867
 868         if (remote_machine == NULL) {
 869                 remote_machine = "127.0.0.1";
 870         }
 871
 872         if (remote_machine != NULL) {
 873                 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
 874         }
 875
 876         if (!new_passwd) {
 877                 new_passwd = prompt_for_new_password(stdin_passwd_get);
 878         }
 879
 880         if (!new_passwd) {
 881                 fprintf(stderr, "Unable to get new password.\n");
 882                 exit(1);
 883         }
 884
 885         if (!password_change(remote_machine, user_name, old_passwd, new_passwd, 0)) {
 886                 fprintf(stderr,"Failed to change password for %s\n", user_name);
 887                 result = 1;
 888                 goto done;
 889         }
 890
 891         printf("Password changed for user %s\n", user_name);
 892
 893  done:
 894         safe_free(old_passwd);
 895         safe_free(new_passwd);
 896
 897         return result;
 898 }
 899
 900
 901
 902 /*********************************************************
 903  Start here.
 904 **********************************************************/
 905 int main(int argc, char **argv)
 906 {
 907         static pstring servicesf = CONFIGFILE;
 908
 909 #if defined(HAVE_SET_AUTH_PARAMETERS)
 910         set_auth_parameters(argc, argv);
 911 #endif /* HAVE_SET_AUTH_PARAMETERS */
 912
 913         TimeInit();
 914
 915         setup_logging("smbpasswd", True);
 916
 917         if(!initialize_password_db(True)) {
 918                 fprintf(stderr, "Can't setup password database vectors.\n");
 919                 exit(1);
 920         }
 921
 922         if (!lp_load(servicesf,True,False,False)) {
 923                 fprintf(stderr, "Can't load %s - run testparm to debug it\n",
 924                         servicesf);
 925                 exit(1);
 926         }
 927
 928         /*
 929          * Set the machine NETBIOS name if not already
 930          * set from the config file.
 931          */
 932
 933         if (!*global_myname) {
 934                 char *p;
 935                 fstrcpy(global_myname, myhostname());
 936                 p = strchr_m(global_myname, '.' );
 937                 if (p) *p = 0;
 938         }
 939         strupper(global_myname);
 940
 941         /* Check the effective uid - make sure we are not setuid */
 942         if ((geteuid() == (uid_t)0) && (getuid() != (uid_t)0)) {
 943                 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
 944                 exit(1);
 945         }
 946
 947         /* pre-check for local mode option as first option. We can't
 948            do this via normal getopt as getopt can't be called
 949            twice. */
 950         if (argc > 1 && strcmp(argv[1], "-L") == 0) {
 951                 local_mode = True;
 952         }
 953
 954         if (local_mode || getuid() == 0) {
 955                 secrets_init();
 956                 return process_root(argc, argv);
 957         }
 958
 959         return process_nonroot(argc, argv);
 960 }