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 3 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, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "ads.h"
  22 #include "secrets.h"
  23
  24 #ifdef HAVE_KRB5
  25
  26 ADS_STATUS ads_change_trust_account_password(ADS_STRUCT *ads, char *host_principal)
  27 {
  28         char *password;
  29         char *new_password;
  30         ADS_STATUS ret;
  31         enum netr_SchannelType sec_channel_type;
  32
  33         if ((password = secrets_fetch_machine_password(lp_workgroup(), NULL, &sec_channel_type)) == NULL) {
  34                 DEBUG(1,("Failed to retrieve password for principal %s\n", host_principal));
  35                 return ADS_ERROR_SYSTEM(ENOENT);
  36         }
  37
  38         new_password = generate_random_str(talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
  39
  40         ret = kerberos_set_password(ads->auth.kdc_server, host_principal, password, host_principal, new_password, ads->auth.time_offset);
  41
  42         if (!ADS_ERR_OK(ret)) {
  43                 goto failed;
  44         }
  45
  46         if (!secrets_store_machine_password(new_password, lp_workgroup(), sec_channel_type)) {
  47                 DEBUG(1,("Failed to save machine password\n"));
  48                 ret = ADS_ERROR_SYSTEM(EACCES);
  49                 goto failed;
  50         }
  51
  52 failed:
  53         SAFE_FREE(password);
  54         return ret;
  55 }
  56
  57 ADS_STATUS ads_guess_service_principal(ADS_STRUCT *ads,
  58                                        char **returned_principal)
  59 {
  60         char *princ = NULL;
  61
  62         if (ads->server.realm && ads->server.ldap_server) {
  63                 char *server, *server_realm;
  64
  65                 server = SMB_STRDUP(ads->server.ldap_server);
  66                 server_realm = SMB_STRDUP(ads->server.realm);
  67
  68                 if (!server || !server_realm) {
  69                         SAFE_FREE(server);
  70                         SAFE_FREE(server_realm);
  71                         return ADS_ERROR(LDAP_NO_MEMORY);
  72                 }
  73
  74                 strlower_m(server);
  75                 strupper_m(server_realm);
  76                 if (asprintf(&princ, "ldap/%s@%s", server, server_realm) == -1) {
  77                         SAFE_FREE(server);
  78                         SAFE_FREE(server_realm);
  79                         return ADS_ERROR(LDAP_NO_MEMORY);
  80                 }
  81
  82                 SAFE_FREE(server);
  83                 SAFE_FREE(server_realm);
  84
  85                 if (!princ) {
  86                         return ADS_ERROR(LDAP_NO_MEMORY);
  87                 }
  88         } else if (ads->config.realm && ads->config.ldap_server_name) {
  89                 char *server, *server_realm;
  90
  91                 server = SMB_STRDUP(ads->config.ldap_server_name);
  92                 server_realm = SMB_STRDUP(ads->config.realm);
  93
  94                 if (!server || !server_realm) {
  95                         SAFE_FREE(server);
  96                         SAFE_FREE(server_realm);
  97                         return ADS_ERROR(LDAP_NO_MEMORY);
  98                 }
  99
 100                 strlower_m(server);
 101                 strupper_m(server_realm);
 102                 if (asprintf(&princ, "ldap/%s@%s", server, server_realm) == -1) {
 103                         SAFE_FREE(server);
 104                         SAFE_FREE(server_realm);
 105                         return ADS_ERROR(LDAP_NO_MEMORY);
 106                 }
 107
 108                 SAFE_FREE(server);
 109                 SAFE_FREE(server_realm);
 110
 111                 if (!princ) {
 112                         return ADS_ERROR(LDAP_NO_MEMORY);
 113                 }
 114         }
 115
 116         if (!princ) {
 117                 return ADS_ERROR(LDAP_PARAM_ERROR);
 118         }
 119
 120         *returned_principal = princ;
 121
 122         return ADS_SUCCESS;
 123 }
 124
 125 #endif