source3/libads/util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    krb5 set password implementation
   4    Copyright (C) Remus Koos 2001 (remuskoos@yahoo.com)
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23 #ifdef HAVE_KRB5
  24
  25 ADS_STATUS ads_change_trust_account_password(ADS_STRUCT *ads, char *host_principal)
  26 {
  27     char *tmp_password;
  28     char *password;
  29     char *new_password;
  30     char *service_principal;
  31     ADS_STATUS ret;
  32     uint32 sec_channel_type;
  33
  34     if ((password = secrets_fetch_machine_password(lp_workgroup(), NULL, &sec_channel_type)) == NULL) {
  35         DEBUG(1,("Failed to retrieve password for principal %s\n", host_principal));
  36         return ADS_ERROR_SYSTEM(ENOENT);
  37     }
  38
  39     tmp_password = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
  40     new_password = strdup(tmp_password);
  41
  42     asprintf(&service_principal, "HOST/%s", host_principal);
  43
  44     ret = kerberos_set_password(ads->auth.kdc_server, service_principal, password, service_principal, new_password, ads->auth.time_offset);
  45
  46     if (!ADS_ERR_OK(ret)) goto failed;
  47
  48     if (!secrets_store_machine_password(new_password, lp_workgroup(), sec_channel_type)) {
  49             DEBUG(1,("Failed to save machine password\n"));
  50             return ADS_ERROR_SYSTEM(EACCES);
  51     }
  52
  53 failed:
  54     SAFE_FREE(service_principal);
  55     SAFE_FREE(new_password);
  56
  57     return ret;
  58 }
  59
  60
  61
  62 #endif