source3/utils/smbpasswd.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Copyright (C) Jeremy Allison 1995-1998
   4  * Copyright (C) Tim Potter     2001
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, write to the Free Software Foundation, Inc., 675
  18  * Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include "includes.h"
  21
  22 extern pstring global_myname;
  23 extern BOOL AllowDebugChange;
  24
  25 /*
  26  * Next two lines needed for SunOS and don't
  27  * hurt anything else...
  28  */
  29 extern char *optarg;
  30 extern int optind;
  31
  32 /* forced running in root-mode */
  33 static BOOL local_mode;
  34 static BOOL got_pass = False, got_username = False;
  35 static int local_flags = 0;
  36 static BOOL stdin_passwd_get = False;
  37 static fstring user_name, user_password;
  38 static char *new_domain = NULL;
  39 static char *new_passwd = NULL;
  40 static char *old_passwd = NULL;
  41 static char *remote_machine = NULL;
  42 static pstring configfile;
  43
  44 #ifdef WITH_LDAP_SAM
  45 static fstring ldap_secret;
  46 #endif
  47
  48 /*********************************************************
  49  Print command usage on stderr and die.
  50 **********************************************************/
  51 static void usage(void)
  52 {
  53         printf("When run by root:\n");
  54         printf("    smbpasswd [options] [username] [password]\n");
  55         printf("otherwise:\n");
  56         printf("    smbpasswd [options] [password]\n\n");
  57
  58         printf("options:\n");
  59         printf("  -c smb.conf file     Use the given path to the smb.conf file\n");
  60         printf("  -s                   use stdin for password prompt\n");
  61         printf("  -D LEVEL             debug level\n");
  62         printf("  -U USER              remote username\n");
  63         printf("  -r MACHINE           remote machine\n");
  64
  65         printf("extra options when run by root or in local mode:\n");
  66         printf("  -L                   local mode\n");
  67         printf("  -R ORDER             name resolve order\n");
  68         printf("  -a                   add user\n");
  69         printf("  -x                   delete user\n");
  70         printf("  -d                   disable user\n");
  71         printf("  -e                   enable user\n");
  72         printf("  -n                   set no password\n");
  73         printf("  -m                   machine trust account\n");
  74         printf("  -i                   interdomain trust account\n");
  75 #ifdef WITH_LDAP_SAM
  76         printf("  -w                   ldap admin password\n");
  77 #endif
  78
  79         exit(1);
  80 }
  81
  82 static void set_line_buffering(FILE *f)
  83 {
  84         setvbuf(f, NULL, _IOLBF, 0);
  85 }
  86
  87 /*******************************************************************
  88  Process command line options
  89  ******************************************************************/
  90 static void process_options(int argc, char **argv, BOOL amroot)
  91 {
  92         int ch;
  93
  94         if (amroot)
  95                 local_flags = LOCAL_SET_PASSWORD;
  96
  97         ZERO_STRUCT(user_name);
  98         ZERO_STRUCT(user_password);
  99
 100         user_name[0] = '\0';
 101
 102         while ((ch = getopt(argc, argv, "c:axdehmnj:r:sw:R:D:U:L")) != EOF) {
 103                 switch(ch) {
 104                 case 'L':
 105                         local_mode = amroot = True;
 106                         break;
 107                 case 'c':
 108                         pstrcpy(configfile,optarg);
 109                         break;
 110                 case 'a':
 111                         if (!amroot) goto bad_args;
 112                         local_flags |= LOCAL_ADD_USER;
 113                         break;
 114                 case 'x':
 115                         if (!amroot) goto bad_args;
 116                         local_flags |= LOCAL_DELETE_USER;
 117                         local_flags &= ~LOCAL_SET_PASSWORD;
 118                         break;
 119                 case 'd':
 120                         if (!amroot) goto bad_args;
 121                         local_flags |= LOCAL_DISABLE_USER;
 122                         local_flags &= ~LOCAL_SET_PASSWORD;
 123                         break;
 124                 case 'e':
 125                         if (!amroot) goto bad_args;
 126                         local_flags |= LOCAL_ENABLE_USER;
 127                         local_flags &= ~LOCAL_SET_PASSWORD;
 128                         break;
 129                 case 'm':
 130                         if (!amroot) goto bad_args;
 131                         local_flags |= LOCAL_TRUST_ACCOUNT;
 132                         break;
 133                 case 'i':
 134                         if (!amroot) goto bad_args;
 135                         local_flags |= LOCAL_INTERDOM_ACCOUNT;
 136                         break;
 137                 case 'j':
 138                         if (!amroot) goto bad_args;
 139                         d_printf("See 'net rpc join' for this functionality\n");
 140                         exit(1);
 141                         break;
 142                 case 'n':
 143                         if (!amroot) goto bad_args;
 144                         local_flags |= LOCAL_SET_NO_PASSWORD;
 145                         new_passwd = smb_xstrdup("NO PASSWORD");
 146                         break;
 147                 case 'r':
 148                         remote_machine = optarg;
 149                         break;
 150                 case 's':
 151                         set_line_buffering(stdin);
 152                         set_line_buffering(stdout);
 153                         set_line_buffering(stderr);
 154                         stdin_passwd_get = True;
 155                         break;
 156                 case 'w':
 157                         if (!amroot) goto bad_args;
 158 #ifdef WITH_LDAP_SAM
 159                         local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
 160                         fstrcpy(ldap_secret, optarg);
 161                         break;
 162 #else
 163                         printf("-w not available unless configured --with-ldap\n");
 164                         goto bad_args;
 165 #endif
 166                 case 'R':
 167                         if (!amroot) goto bad_args;
 168                         lp_set_name_resolve_order(optarg);
 169                         break;
 170                 case 'D':
 171                         DEBUGLEVEL = atoi(optarg);
 172                         break;
 173                 case 'U': {
 174                         char *lp;
 175
 176                         got_username = True;
 177                         fstrcpy(user_name, optarg);
 178
 179                         if ((lp = strchr(user_name, '%'))) {
 180                                 *lp = 0;
 181                                 fstrcpy(user_password, lp + 1);
 182                                 got_pass = True;
 183                                 memset(strchr_m(optarg, '%') + 1, 'X',
 184                                        strlen(user_password));
 185                         }
 186
 187                         break;
 188                 }
 189                 case 'h':
 190                 default:
 191 bad_args:
 192                         usage();
 193                 }
 194         }
 195
 196         argc -= optind;
 197         argv += optind;
 198
 199         switch(argc) {
 200         case 0:
 201                 if (!got_username)
 202                         fstrcpy(user_name, "");
 203                 break;
 204         case 1:
 205                 if (!amroot) {
 206                         new_passwd = argv[0];
 207                         break;
 208                 }
 209                 if (got_username)
 210                         usage();
 211                 fstrcpy(user_name, argv[0]);
 212                 break;
 213         case 2:
 214                 if (!amroot || got_username || got_pass)
 215                         usage();
 216                 fstrcpy(user_name, argv[0]);
 217                 new_passwd = smb_xstrdup(argv[1]);
 218                 break;
 219         default:
 220                 usage();
 221         }
 222
 223 }
 224
 225 /*************************************************************
 226  Utility function to prompt for passwords from stdin. Each
 227  password entered must end with a newline.
 228 *************************************************************/
 229 static char *stdin_new_passwd(void)
 230 {
 231         static fstring new_passwd;
 232         size_t len;
 233
 234         ZERO_ARRAY(new_passwd);
 235
 236         /*
 237          * if no error is reported from fgets() and string at least contains
 238          * the newline that ends the password, then replace the newline with
 239          * a null terminator.
 240          */
 241         if ( fgets(new_passwd, sizeof(new_passwd), stdin) != NULL) {
 242                 if ((len = strlen(new_passwd)) > 0) {
 243                         if(new_passwd[len-1] == '\n')
 244                                 new_passwd[len - 1] = 0;
 245                 }
 246         }
 247         return(new_passwd);
 248 }
 249
 250
 251 /*************************************************************
 252  Utility function to get passwords via tty or stdin
 253  Used if the '-s' option is set to silently get passwords
 254  to enable scripting.
 255 *************************************************************/
 256 static char *get_pass( char *prompt, BOOL stdin_get)
 257 {
 258         char *p;
 259         if (stdin_get) {
 260                 p = stdin_new_passwd();
 261         } else {
 262                 p = getpass(prompt);
 263         }
 264         return smb_xstrdup(p);
 265 }
 266
 267 /*************************************************************
 268  Utility function to prompt for new password.
 269 *************************************************************/
 270 static char *prompt_for_new_password(BOOL stdin_get)
 271 {
 272         char *p;
 273         fstring new_passwd;
 274
 275         ZERO_ARRAY(new_passwd);
 276
 277         p = get_pass("New SMB password:", stdin_get);
 278
 279         fstrcpy(new_passwd, p);
 280         SAFE_FREE(p);
 281
 282         p = get_pass("Retype new SMB password:", stdin_get);
 283
 284         if (strcmp(p, new_passwd)) {
 285                 fprintf(stderr, "Mismatch - password unchanged.\n");
 286                 ZERO_ARRAY(new_passwd);
 287                 SAFE_FREE(p);
 288                 return NULL;
 289         }
 290
 291         return p;
 292 }
 293
 294
 295 /*************************************************************
 296  Change a password either locally or remotely.
 297 *************************************************************/
 298
 299 static BOOL password_change(const char *remote_machine, char *user_name,
 300                             char *old_passwd, char *new_passwd, int local_flags)
 301 {
 302         BOOL ret;
 303         pstring err_str;
 304         pstring msg_str;
 305
 306         if (remote_machine != NULL) {
 307                 if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
 308                                                         LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
 309                         /* these things can't be done remotely yet */
 310                         return False;
 311                 }
 312                 ret = remote_password_change(remote_machine, user_name,
 313                                              old_passwd, new_passwd, err_str, sizeof(err_str));
 314                 if(*err_str)
 315                         fprintf(stderr, err_str);
 316                 return ret;
 317         }
 318
 319         ret = local_password_change(user_name, local_flags, new_passwd,
 320                                      err_str, sizeof(err_str), msg_str, sizeof(msg_str));
 321
 322         if(*msg_str)
 323                 printf(msg_str);
 324         if(*err_str)
 325                 fprintf(stderr, err_str);
 326
 327         return ret;
 328 }
 329
 330 #ifdef WITH_LDAP_SAM
 331 /*******************************************************************
 332  Store the LDAP admin password in secrets.tdb
 333  ******************************************************************/
 334 static BOOL store_ldap_admin_pw (char* pw)
 335 {
 336         if (!pw)
 337                 return False;
 338
 339         if (!secrets_init())
 340                 return False;
 341
 342         return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
 343 }
 344 #endif
 345
 346
 347 /*************************************************************
 348  Handle password changing for root.
 349 *************************************************************/
 350
 351 static int process_root(void)
 352 {
 353         struct passwd  *pwd;
 354         int result = 0;
 355
 356 #ifdef WITH_LDAP_SAM
 357         if (local_flags & LOCAL_SET_LDAP_ADMIN_PW)
 358         {
 359                 printf("Setting stored password for \"%s\" in secrets.tdb\n",
 360                         lp_ldap_admin_dn());
 361                 if (!store_ldap_admin_pw(ldap_secret))
 362                         DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
 363                 goto done;
 364         }
 365 #endif
 366
 367         /*
 368          * Ensure both add/delete user are not set
 369          * Ensure add/delete user and either remote machine or join domain are
 370          * not both set.
 371          */
 372         if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
 373            ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
 374                 (remote_machine != NULL))) {
 375                 usage();
 376         }
 377
 378         /* Only load interfaces if we are doing network operations. */
 379
 380         if (remote_machine) {
 381                 load_interfaces();
 382         }
 383
 384         if (!user_name[0] && (pwd = sys_getpwuid(geteuid()))) {
 385                 fstrcpy(user_name, pwd->pw_name);
 386         }
 387
 388         if (!user_name[0]) {
 389                 fprintf(stderr,"You must specify a username\n");
 390                 exit(1);
 391         }
 392
 393         if (local_flags & LOCAL_TRUST_ACCOUNT) {
 394                 /* add the $ automatically */
 395                 static fstring buf;
 396
 397                 /*
 398                  * Remove any trailing '$' before we
 399                  * generate the initial machine password.
 400                  */
 401
 402                 if (user_name[strlen(user_name)-1] == '$') {
 403                         user_name[strlen(user_name)-1] = 0;
 404                 }
 405
 406                 if (local_flags & LOCAL_ADD_USER) {
 407                         SAFE_FREE(new_passwd);
 408                         new_passwd = smb_xstrdup(user_name);
 409                         strlower(new_passwd);
 410                 }
 411
 412                 /*
 413                  * Now ensure the username ends in '$' for
 414                  * the machine add.
 415                  */
 416
 417                 slprintf(buf, sizeof(buf)-1, "%s$", user_name);
 418                 fstrcpy(user_name, buf);
 419         } else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
 420                 static fstring buf;
 421
 422                 if (local_flags & LOCAL_ADD_USER) {
 423                         /*
 424                          * Prompt for trusting domain's account password
 425                          */
 426                         new_passwd = prompt_for_new_password(stdin_passwd_get);
 427                         if(!new_passwd) {
 428                                 fprintf(stderr, "Unable to get newpassword.\n");
 429                                 exit(1);
 430                         }
 431                 }
 432                 slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
 433                 fstrcpy(user_name, buf);
 434
 435         } else {
 436
 437                 if (remote_machine != NULL) {
 438                         old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
 439                 }
 440
 441                 if (!(local_flags & LOCAL_SET_PASSWORD)) {
 442
 443                         /*
 444                          * If we are trying to enable a user, first we need to find out
 445                          * if they are using a modern version of the smbpasswd file that
 446                          * disables a user by just writing a flag into the file. If so
 447                          * then we can re-enable a user without prompting for a new
 448                          * password. If not (ie. they have a no stored password in the
 449                          * smbpasswd file) then we need to prompt for a new password.
 450                          */
 451
 452                         if(local_flags & LOCAL_ENABLE_USER) {
 453                                 SAM_ACCOUNT *sampass = NULL;
 454                                 BOOL ret;
 455
 456                                 pdb_init_sam(&sampass);
 457                                 ret = pdb_getsampwnam(sampass, user_name);
 458                                 if((sampass != False) && (pdb_get_lanman_passwd(sampass) == NULL)) {
 459                                         local_flags |= LOCAL_SET_PASSWORD;
 460                                 }
 461                                 pdb_free_sam(&sampass);
 462                         }
 463                 }
 464
 465                 if(local_flags & LOCAL_SET_PASSWORD) {
 466                         new_passwd = prompt_for_new_password(stdin_passwd_get);
 467
 468                         if(!new_passwd) {
 469                                 fprintf(stderr, "Unable to get new password.\n");
 470                                 exit(1);
 471                         }
 472                 }
 473         }
 474
 475         if (!password_change(remote_machine, user_name, old_passwd, new_passwd, local_flags)) {
 476                 fprintf(stderr,"Failed to modify password entry for user %s\n", user_name);
 477                 result = 1;
 478                 goto done;
 479         }
 480
 481         if(remote_machine) {
 482                 printf("Password changed for user %s on %s.\n", user_name, remote_machine );
 483         } else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
 484                 SAM_ACCOUNT *sampass = NULL;
 485                 BOOL ret;
 486
 487                 pdb_init_sam(&sampass);
 488                 ret = pdb_getsampwnam(sampass, user_name);
 489
 490                 printf("Password changed for user %s.", user_name );
 491                 if( (ret != False) && (pdb_get_acct_ctrl(sampass)&ACB_DISABLED) )
 492                         printf(" User has disabled flag set.");
 493                 if((ret != False) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) )
 494                         printf(" User has no password flag set.");
 495                 printf("\n");
 496                 pdb_free_sam(&sampass);
 497         }
 498
 499  done:
 500         SAFE_FREE(new_passwd);
 501         return result;
 502 }
 503
 504
 505 /*************************************************************
 506  Handle password changing for non-root.
 507 *************************************************************/
 508
 509 static int process_nonroot(void)
 510 {
 511         struct passwd  *pwd = NULL;
 512         int result = 0;
 513
 514         if (!user_name[0]) {
 515                 pwd = sys_getpwuid(getuid());
 516                 if (pwd) {
 517                         fstrcpy(user_name,pwd->pw_name);
 518                 } else {
 519                         fprintf(stderr, "smbpasswd: you don't exist - go away\n");
 520                         exit(1);
 521                 }
 522         }
 523
 524         /*
 525          * A non-root user is always setting a password
 526          * via a remote machine (even if that machine is
 527          * localhost).
 528          */
 529
 530         load_interfaces(); /* Delayed from main() */
 531
 532         if (remote_machine == NULL) {
 533                 remote_machine = "127.0.0.1";
 534         }
 535
 536         if (remote_machine != NULL) {
 537                 old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
 538         }
 539
 540         if (!new_passwd) {
 541                 new_passwd = prompt_for_new_password(stdin_passwd_get);
 542         }
 543
 544         if (!new_passwd) {
 545                 fprintf(stderr, "Unable to get new password.\n");
 546                 exit(1);
 547         }
 548
 549         if (!password_change(remote_machine, user_name, old_passwd, new_passwd, 0)) {
 550                 fprintf(stderr,"Failed to change password for %s\n", user_name);
 551                 result = 1;
 552                 goto done;
 553         }
 554
 555         printf("Password changed for user %s\n", user_name);
 556
 557  done:
 558         SAFE_FREE(old_passwd);
 559         SAFE_FREE(new_passwd);
 560
 561         return result;
 562 }
 563
 564
 565
 566 /*********************************************************
 567  Start here.
 568 **********************************************************/
 569 int main(int argc, char **argv)
 570 {
 571         BOOL amroot = getuid() == 0;
 572
 573         pstrcpy(configfile, dyn_CONFIGFILE);
 574         AllowDebugChange = False;
 575
 576 #if defined(HAVE_SET_AUTH_PARAMETERS)
 577         set_auth_parameters(argc, argv);
 578 #endif /* HAVE_SET_AUTH_PARAMETERS */
 579
 580         process_options(argc, argv, amroot);
 581
 582         setup_logging("smbpasswd", True);
 583
 584         if (!lp_load(configfile,True,False,False)) {
 585                 fprintf(stderr, "Can't load %s - run testparm to debug it\n",
 586                         dyn_CONFIGFILE);
 587                 exit(1);
 588         }
 589
 590         /*
 591          * Set the machine NETBIOS name if not already
 592          * set from the config file.
 593          */
 594
 595         if (!*global_myname) {
 596                 char *p;
 597                 fstrcpy(global_myname, myhostname());
 598                 p = strchr_m(global_myname, '.' );
 599                 if (p) *p = 0;
 600         }
 601         strupper(global_myname);
 602
 603         /* Check the effective uid - make sure we are not setuid */
 604         if (is_setuid_root()) {
 605                 fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
 606                 exit(1);
 607         }
 608
 609         if (local_mode || amroot) {
 610                 secrets_init();
 611                 return process_root();
 612         }
 613
 614         return process_nonroot();
 615 }