source3/utils/smbpasswd.c

   1 /*
   2  * Unix SMB/Netbios implementation. Version 1.9. smbpasswd module. Copyright
   3  * (C) Jeremy Allison 1995-1998
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free
   7  * Software Foundation; either version 2 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 675
  17  * Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include "includes.h"
  21
  22 extern pstring myhostname;
  23 extern pstring global_myname;
  24 extern fstring global_myworkgroup;
  25
  26 static char *prog_name;
  27
  28 /*********************************************************
  29  Print command usage on stderr and die.
  30 **********************************************************/
  31
  32 static void usage(char *name, BOOL is_root)
  33 {
  34         if(is_root)
  35                 fprintf(stderr, "Usage is : %s [-D DEBUGLEVEL] [-a] [-d] [-m] [-n] [username] [password]\n\
  36 %s: [-R <name resolve order>] [-D DEBUGLEVEL] [-j DOMAINNAME] [-r machine] [username] [password]\n%s: [-h]\n", name, name, name);
  37         else
  38                 fprintf(stderr, "Usage is : %s [-h] [-D DEBUGLEVEL] [-r machine] [password]\n", name);
  39         exit(1);
  40 }
  41
  42 /*********************************************************
  43 Join a domain.
  44 **********************************************************/
  45
  46 static int join_domain( char *domain, char *remote)
  47 {
  48   pstring remote_machine;
  49   fstring trust_passwd;
  50   unsigned char orig_trust_passwd_hash[16];
  51   BOOL ret;
  52
  53   pstrcpy(remote_machine, remote ? remote : "");
  54   fstrcpy(trust_passwd, global_myname);
  55   strlower(trust_passwd);
  56   E_md4hash( (uchar *)trust_passwd, orig_trust_passwd_hash);
  57
  58   /* Ensure that we are not trying to join a
  59      domain if we are locally set up as a domain
  60      controller. */
  61
  62   if(lp_domain_controller() && strequal(lp_workgroup(), domain)) {
  63     fprintf(stderr, "%s: Cannot join domain %s as we already configured as \
  64 domain controller for that domain.\n", prog_name, domain);
  65     return 1;
  66   }
  67
  68   /*
  69    * Create the machine account password file.
  70    */
  71   if(!trust_password_lock( domain, global_myname, True)) {
  72     fprintf(stderr, "%s: unable to open the machine account password file for \
  73 machine %s in domain %s.\n", prog_name, global_myname, domain);
  74     return 1;
  75   }
  76
  77   /*
  78    * Write the old machine account password.
  79    */
  80
  81   if(!set_trust_account_password( orig_trust_passwd_hash)) {
  82     fprintf(stderr, "%s: unable to write the machine account password for \
  83 machine %s in domain %s.\n", prog_name, global_myname, domain);
  84     trust_password_unlock();
  85     return 1;
  86   }
  87
  88   /*
  89    * If we are given a remote machine assume this is the PDC.
  90    */
  91
  92   if(remote == NULL)
  93     pstrcpy(remote_machine, lp_passwordserver());
  94
  95   if(!*remote_machine) {
  96     fprintf(stderr, "%s: No password server list given in smb.conf - \
  97 unable to join domain.\n", prog_name);
  98     trust_password_unlock();
  99     return 1;
 100   }
 101
 102   ret = change_trust_account_password( domain, remote_machine);
 103   trust_password_unlock();
 104
 105   if(!ret) {
 106     trust_password_delete( domain, global_myname);
 107     fprintf(stderr,"%s: Unable to join domain %s.\n", prog_name, domain);
 108   } else {
 109     printf("%s: Joined domain %s.\n", prog_name, domain);
 110   }
 111
 112   return (int)ret;
 113 }
 114
 115 /*********************************************************
 116  Start here.
 117 **********************************************************/
 118
 119 int main(int argc, char **argv)
 120 {
 121   extern char *optarg;
 122   extern int optind;
 123   extern int DEBUGLEVEL;
 124   int             real_uid;
 125   struct passwd  *pwd;
 126   fstring         old_passwd;
 127   fstring         new_passwd;
 128   uchar           new_p16[16];
 129   uchar           new_nt_p16[16];
 130   char           *p;
 131   struct smb_passwd *smb_pwent;
 132   FILE           *fp;
 133   int             ch;
 134   int             err;
 135   BOOL is_root = False;
 136   pstring  user_name;
 137   char *remote_machine = NULL;
 138   BOOL add_user = False;
 139   BOOL got_new_pass = False;
 140   BOOL trust_account = False;
 141   BOOL disable_user = False;
 142   BOOL set_no_password = False;
 143   BOOL joining_domain = False;
 144   char *new_domain = NULL;
 145   pstring servicesf = CONFIGFILE;
 146   void           *vp;
 147
 148   new_passwd[0] = '\0';
 149   user_name[0] = '\0';
 150
 151   memset(old_passwd, '\0', sizeof(old_passwd));
 152   memset(new_passwd, '\0', sizeof(new_passwd));
 153
 154   prog_name = argv[0];
 155
 156   TimeInit();
 157
 158   setup_logging(prog_name,True);
 159
 160   charset_initialise();
 161
 162   if(!initialize_password_db()) {
 163     fprintf(stderr, "%s: Can't setup password database vectors.\n", prog_name);
 164     exit(1);
 165   }
 166
 167   if (!lp_load(servicesf,True,False,False)) {
 168     fprintf(stderr, "%s: Can't load %s - run testparm to debug it\n", prog_name, servicesf);
 169     exit(1);
 170   }
 171
 172   if(!get_myname(myhostname,NULL)) {
 173     fprintf(stderr, "%s: unable to get my hostname.\n", prog_name );
 174     exit(1);
 175   }
 176
 177   /*
 178    * Set the machine NETBIOS name if not already
 179    * set from the config file.
 180    */
 181
 182   if (!*global_myname)
 183   {
 184     fstrcpy( global_myname, myhostname );
 185     p = strchr( global_myname, '.' );
 186     if (p)
 187       *p = 0;
 188   }
 189   strupper( global_myname );
 190
 191   codepage_initialise(lp_client_code_page());
 192
 193   /* Get the real uid */
 194   real_uid = getuid();
 195
 196   /* Check the effective uid */
 197   if ((geteuid() == 0) && (real_uid != 0)) {
 198     fprintf(stderr, "%s: Must *NOT* be setuid root.\n", prog_name);
 199     exit(1);
 200   }
 201
 202   is_root = (real_uid == 0);
 203
 204   while ((ch = getopt(argc, argv, "adhmnj:r:R:D:")) != EOF) {
 205     switch(ch) {
 206     case 'a':
 207       if(is_root)
 208         add_user = True;
 209       else
 210         usage(prog_name, is_root);
 211       break;
 212     case 'd':
 213       if(is_root) {
 214         disable_user = True;
 215         got_new_pass = True;
 216         fstrcpy(new_passwd, "XXXXXX");
 217       } else
 218         usage(prog_name, is_root);
 219       break;
 220     case 'D':
 221       DEBUGLEVEL = atoi(optarg);
 222       break;
 223     case 'n':
 224       if(is_root) {
 225         set_no_password = True;
 226         got_new_pass = True;
 227         fstrcpy(new_passwd, "NO PASSWORD");
 228       } else
 229         usage(prog_name, is_root);
 230     case 'r':
 231       remote_machine = optarg;
 232       break;
 233     case 'R':
 234       if(is_root) {
 235         lp_set_name_resolve_order(optarg);
 236         break;
 237       } else
 238         usage(prog_name, is_root);
 239     case 'm':
 240       if(is_root) {
 241         trust_account = True;
 242       } else
 243         usage(prog_name, is_root);
 244       break;
 245     case 'j':
 246       if(is_root) {
 247         new_domain = optarg;
 248         strupper(new_domain);
 249         joining_domain = True;
 250       } else
 251         usage(prog_name, is_root);
 252       break;
 253     case 'h':
 254     default:
 255       usage(prog_name, is_root);
 256     }
 257   }
 258
 259   argc -= optind;
 260   argv += optind;
 261
 262   /*
 263    * Ensure add_user and either remote machine or join domain are
 264    * not both set.
 265    */
 266
 267   if(add_user && ((remote_machine != NULL) || joining_domain))
 268     usage(prog_name, True);
 269
 270   /*
 271    * Deal with joining a domain.
 272    */
 273   if(joining_domain && argc != 0)
 274     usage(prog_name, True);
 275
 276   if(joining_domain) {
 277     return join_domain( new_domain, remote_machine);
 278   }
 279
 280   if(is_root) {
 281
 282     /*
 283      * Deal with root - can add a user, but only locally.
 284      */
 285
 286     switch(argc) {
 287       case 0:
 288         break;
 289       case 1:
 290         /* If we are root we can change another's password. */
 291         pstrcpy(user_name, argv[0]);
 292         break;
 293       case 2:
 294         pstrcpy(user_name, argv[0]);
 295         fstrcpy(new_passwd, argv[1]);
 296         got_new_pass = True;
 297         break;
 298       default:
 299         usage(prog_name, True);
 300     }
 301
 302     if(*user_name) {
 303
 304       if(trust_account) {
 305         int username_len = strlen(user_name);
 306         if(username_len >= sizeof(pstring) - 1) {
 307           fprintf(stderr, "%s: machine account name too long.\n", user_name);
 308           exit(1);
 309         }
 310
 311         if(user_name[username_len-1] != '$') {
 312           user_name[username_len] = '$';
 313           user_name[username_len+1] = '\0';
 314         }
 315       }
 316
 317     /*
 318      * Setup the pwd struct to point to known
 319      * values for a machine account (it doesn't
 320      * exist in /etc/passwd).
 321      */
 322       if((pwd = Get_Pwnam(user_name, True)) == NULL) {
 323         fprintf(stderr, "%s: User \"%s\" was not found in system password file.\n",
 324                     prog_name, user_name);
 325         exit(1);
 326       }
 327     } else {
 328       if((pwd = getpwuid(real_uid)) != NULL)
 329         pstrcpy( user_name, pwd->pw_name);
 330     }
 331
 332   } else {
 333
 334     if(add_user) {
 335       fprintf(stderr, "%s: Only root can set anothers password.\n", prog_name);
 336       usage(prog_name, False);
 337     }
 338
 339     if(argc > 1)
 340       usage(prog_name, False);
 341
 342     if(argc == 1) {
 343       fstrcpy(new_passwd, argv[0]);
 344       got_new_pass = True;
 345     }
 346
 347     if((pwd = getpwuid(real_uid)) != NULL)
 348       pstrcpy( user_name, pwd->pw_name);
 349
 350     /*
 351      * A non-root user is always setting a password
 352      * via a remote machine (even if that machine is
 353      * localhost).
 354      */
 355
 356     if(remote_machine == NULL)
 357       remote_machine = "127.0.0.1";
 358   }
 359
 360   if (*user_name == '\0') {
 361     fprintf(stderr, "%s: Unable to get a user name for password change.\n", prog_name);
 362     exit(1);
 363   }
 364
 365   /*
 366    * If we are adding a machine account then pretend
 367    * we already have the new password, we will be using
 368    * the machinename as the password.
 369    */
 370
 371   if(add_user && trust_account) {
 372     got_new_pass = True;
 373     strncpy(new_passwd, user_name, sizeof(fstring));
 374     new_passwd[sizeof(fstring)-1] = '\0';
 375     strlower(new_passwd);
 376     if(new_passwd[strlen(new_passwd)-1] == '$')
 377       new_passwd[strlen(new_passwd)-1] = '\0';
 378   }
 379
 380   /*
 381    * If we are root we don't ask for the old password (unless it's on a
 382    * remote machine.
 383    */
 384
 385   if (remote_machine != NULL) {
 386     p = getpass("Old SMB password:");
 387     fstrcpy(old_passwd, p);
 388   }
 389
 390   if (!got_new_pass) {
 391     new_passwd[0] = '\0';
 392
 393     p = getpass("New SMB password:");
 394
 395     strncpy(new_passwd, p, sizeof(fstring));
 396     new_passwd[sizeof(fstring)-1] = '\0';
 397
 398     p = getpass("Retype new SMB password:");
 399
 400     if (strncmp(p, new_passwd, sizeof(fstring)-1))
 401     {
 402       fprintf(stderr, "%s: Mismatch - password unchanged.\n", prog_name);
 403       exit(1);
 404     }
 405   }
 406
 407   if (new_passwd[0] == '\0') {
 408     printf("Password not set\n");
 409     exit(0);
 410   }
 411
 412   /*
 413    * Now do things differently depending on if we're changing the
 414    * password on a remote machine. Remember - a normal user is
 415    * always using this code, looping back to the local smbd.
 416    */
 417
 418   if(remote_machine != NULL) {
 419     struct cli_state cli;
 420     struct in_addr ip;
 421
 422     if(!resolve_name( remote_machine, &ip)) {
 423       fprintf(stderr, "%s: unable to find an IP address for machine %s.\n",
 424               prog_name, remote_machine );
 425       exit(1);
 426     }
 427
 428     memset(&cli, '\0', sizeof(struct cli_state));
 429
 430     if (!cli_initialise(&cli) || !cli_connect(&cli, remote_machine, &ip)) {
 431       fprintf(stderr, "%s: unable to connect to SMB server on machine %s. Error was : %s.\n",
 432               prog_name, remote_machine, cli_errstr(&cli) );
 433       exit(1);
 434     }
 435
 436     if (!cli_session_request(&cli, remote_machine, 0x20, global_myname)) {
 437       fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n",
 438               prog_name, remote_machine, cli_errstr(&cli) );
 439       cli_shutdown(&cli);
 440       exit(1);
 441     }
 442
 443     cli.protocol = PROTOCOL_NT1;
 444
 445     if (!cli_negprot(&cli)) {
 446       fprintf(stderr, "%s: machine %s rejected the negotiate protocol. Error was : %s.\n",
 447               prog_name, remote_machine, cli_errstr(&cli) );
 448       cli_shutdown(&cli);
 449       exit(1);
 450     }
 451
 452     if (!cli_session_setup(&cli, user_name, old_passwd, strlen(old_passwd),
 453                            "", 0, "")) {
 454       fprintf(stderr, "%s: machine %s rejected the session setup. Error was : %s.\n",
 455               prog_name, remote_machine, cli_errstr(&cli) );
 456       cli_shutdown(&cli);
 457       exit(1);
 458     }
 459
 460     if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
 461       fprintf(stderr, "%s: machine %s rejected the tconX on the IPC$ share. Error was : %s.\n",
 462               prog_name, remote_machine, cli_errstr(&cli) );
 463       cli_shutdown(&cli);
 464       exit(1);
 465     }
 466
 467     if(!cli_oem_change_password(&cli, user_name, new_passwd, old_passwd)) {
 468       fprintf(stderr, "%s: machine %s rejected the password change: Error was : %s.\n",
 469               prog_name, remote_machine, cli_errstr(&cli) );
 470       cli_shutdown(&cli);
 471       exit(1);
 472     }
 473
 474     cli_shutdown(&cli);
 475     exit(0);
 476   }
 477
 478   /*
 479    * Check for a machine account.
 480    */
 481
 482   if(trust_account && !pwd) {
 483     fprintf(stderr, "%s: User %s does not exist in system password file \
 484 (usually /etc/passwd). Cannot add machine account without a valid system user.\n",
 485            prog_name, user_name);
 486     exit(1);
 487   }
 488
 489   /* Calculate the MD4 hash (NT compatible) of the new password. */
 490
 491   memset(new_nt_p16, '\0', 16);
 492   E_md4hash((uchar *) new_passwd, new_nt_p16);
 493
 494   /* Mangle the password into Lanman format */
 495   new_passwd[14] = '\0';
 496   strupper(new_passwd);
 497
 498   /*
 499    * Calculate the SMB (lanman) hash functions of the new password.
 500    */
 501
 502   memset(new_p16, '\0', 16);
 503   E_P16((uchar *) new_passwd, new_p16);
 504
 505   /*
 506    * Open the smbpaswd file.
 507    */
 508   vp = startsmbpwent(True);
 509   if (!vp && errno == ENOENT) {
 510           fp = fopen(lp_smb_passwd_file(), "w");
 511           if (fp) {
 512                   fprintf(fp, "# Samba SMB password file\n");
 513                   fclose(fp);
 514                   vp = startsmbpwent(True);
 515           }
 516   }
 517   if (!vp) {
 518           err = errno;
 519           fprintf(stderr, "%s: Failed to open password file %s.\n",
 520                   prog_name, lp_smb_passwd_file());
 521           errno = err;
 522           perror(prog_name);
 523           exit(err);
 524   }
 525
 526   /* Get the smb passwd entry for this user */
 527   smb_pwent = getsmbpwnam(user_name);
 528   if (smb_pwent == NULL) {
 529     if(add_user == False) {
 530       fprintf(stderr, "%s: Failed to find entry for user %s.\n",
 531               prog_name, pwd->pw_name);
 532       endsmbpwent(vp);
 533       exit(1);
 534     }
 535
 536     /* Create a new smb passwd entry and set it to the given password. */
 537     {
 538       struct smb_passwd new_smb_pwent;
 539
 540       new_smb_pwent.smb_userid = pwd->pw_uid;
 541       new_smb_pwent.smb_name = pwd->pw_name;
 542       new_smb_pwent.smb_passwd = NULL;
 543       new_smb_pwent.smb_nt_passwd = NULL;
 544       new_smb_pwent.acct_ctrl = (trust_account ? ACB_WSTRUST : ACB_NORMAL);
 545
 546       if(disable_user) {
 547         new_smb_pwent.acct_ctrl |= ACB_DISABLED;
 548       } else if (set_no_password) {
 549         new_smb_pwent.acct_ctrl |= ACB_PWNOTREQ;
 550       } else {
 551         new_smb_pwent.smb_passwd = new_p16;
 552         new_smb_pwent.smb_nt_passwd = new_nt_p16;
 553       }
 554
 555       if(add_smbpwd_entry(&new_smb_pwent) == False) {
 556         fprintf(stderr, "%s: Failed to add entry for user %s.\n",
 557                 prog_name, pwd->pw_name);
 558         endsmbpwent(vp);
 559         exit(1);
 560       }
 561
 562       endsmbpwent(vp);
 563       printf("%s: Added user %s.\n", prog_name, user_name);
 564       exit(0);
 565     }
 566   } else {
 567           /* the entry already existed */
 568           add_user = False;
 569   }
 570
 571   /*
 572    * We are root - just write the new password
 573    * and the valid last change time.
 574    */
 575
 576   if(disable_user) {
 577     /*
 578      * This currently won't work as it means changing
 579      * the length of the record. JRA.
 580      */
 581     smb_pwent->acct_ctrl |= ACB_DISABLED;
 582     smb_pwent->smb_passwd = NULL;
 583     smb_pwent->smb_nt_passwd = NULL;
 584   } else if (set_no_password) {
 585     /*
 586      * This currently won't work as it means changing
 587      * the length of the record. JRA.
 588      */
 589     smb_pwent->acct_ctrl |= ACB_PWNOTREQ;
 590     smb_pwent->smb_passwd = NULL;
 591     smb_pwent->smb_nt_passwd = NULL;
 592   } else {
 593     smb_pwent->smb_passwd = new_p16;
 594     smb_pwent->smb_nt_passwd = new_nt_p16;
 595   }
 596
 597   if(mod_smbpwd_entry(smb_pwent,True) == False) {
 598     fprintf(stderr, "%s: Failed to modify entry for user %s.\n",
 599             prog_name, pwd->pw_name);
 600     endsmbpwent(vp);
 601     exit(1);
 602   }
 603
 604   endsmbpwent(vp);
 605   if(disable_user)
 606     printf("User %s disabled.\n", user_name);
 607   else if (set_no_password)
 608     printf("User %s - set to no password.\n", user_name);
 609   else
 610     printf("Password changed for user %s.\n", user_name);
 611   return 0;
 612 }