source/nsswitch/winbindd_misc.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 2.0
   4
   5    Winbind daemon - miscellaneous other functions
   6
   7    Copyright (C) Tim Potter 2000
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "winbindd.h"
  25
  26 extern pstring global_myname;
  27
  28 /************************************************************************
  29  Routine to get the trust account password for a domain
  30 ************************************************************************/
  31 static BOOL _get_trust_account_password(char *domain, unsigned char *ret_pwd,
  32                                         time_t *pass_last_set_time)
  33 {
  34         struct machine_acct_pass *pass;
  35         size_t size;
  36
  37         if (!(pass = secrets_fetch(trust_keystr(domain), &size)) ||
  38             size != sizeof(*pass))
  39                 return False;
  40
  41         if (pass_last_set_time)
  42                 *pass_last_set_time = pass->mod_time;
  43
  44         memcpy(ret_pwd, pass->hash, 16);
  45         SAFE_FREE(pass);
  46
  47         return True;
  48 }
  49
  50 /* Check the machine account password is valid */
  51
  52 enum winbindd_result winbindd_check_machine_acct(struct winbindd_cli_state *state)
  53 {
  54         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
  55         uchar trust_passwd[16];
  56         int num_retries = 0;
  57         struct cli_state *cli;
  58         DEBUG(3, ("[%5d]: check machine account\n", state->pid));
  59
  60         /* Get trust account password */
  61
  62  again:
  63         if (!_get_trust_account_password(lp_workgroup(), trust_passwd,
  64                                          NULL)) {
  65                 result = NT_STATUS_INTERNAL_ERROR;
  66                 goto done;
  67         }
  68
  69         /* This call does a cli_nt_setup_creds() which implicitly checks
  70            the trust account password. */
  71
  72         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
  73
  74         if (!NT_STATUS_IS_OK(result)) {
  75                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
  76                 goto done;
  77         }
  78
  79         cli_shutdown(cli);
  80
  81         /* There is a race condition between fetching the trust account
  82            password and joining the domain so it's possible that the trust
  83            account password has been changed on us.  We are returned
  84            NT_STATUS_ACCESS_DENIED if this happens. */
  85
  86 #define MAX_RETRIES 8
  87
  88         if ((num_retries < MAX_RETRIES) &&
  89             NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED)) {
  90                 num_retries++;
  91                 goto again;
  92         }
  93
  94         /* Pass back result code - zero for success, other values for
  95            specific failures. */
  96
  97         DEBUG(3, ("secret is %s\n", NT_STATUS_IS_OK(result) ?
  98                   "good" : "bad"));
  99
 100  done:
 101         state->response.data.num_entries = NT_STATUS_V(result);
 102
 103         return WINBINDD_OK;
 104 }
 105
 106 enum winbindd_result winbindd_list_trusted_domains(struct winbindd_cli_state
 107                                                    *state)
 108 {
 109         struct winbindd_domain *domain;
 110         int total_entries = 0, extra_data_len = 0;
 111         char *ted, *extra_data = NULL;
 112
 113         DEBUG(3, ("[%5d]: list trusted domains\n", state->pid));
 114
 115         if (domain_list == NULL)
 116                 get_domain_info();
 117
 118         for(domain = domain_list; domain; domain = domain->next) {
 119
 120                 /* Skip own domain */
 121
 122                 if (strequal(domain->name, lp_workgroup())) continue;
 123
 124                 /* Add domain to list */
 125
 126                 total_entries++;
 127                 ted = Realloc(extra_data, sizeof(fstring) *
 128                               total_entries);
 129
 130                 if (!ted) {
 131                         DEBUG(0,("winbindd_list_trusted_domains: failed to enlarge buffer!\n"));
 132                         SAFE_FREE(extra_data);
 133                         return WINBINDD_ERROR;
 134                 } else
 135                         extra_data = ted;
 136
 137                 memcpy(&extra_data[extra_data_len], domain->name,
 138                        strlen(domain->name));
 139
 140                 extra_data_len  += strlen(domain->name);
 141                 extra_data[extra_data_len++] = ',';
 142         }
 143
 144         if (extra_data) {
 145                 if (extra_data_len > 1)
 146                         extra_data[extra_data_len - 1] = '\0';
 147                 state->response.extra_data = extra_data;
 148                 state->response.length += extra_data_len;
 149         }
 150
 151         return WINBINDD_OK;
 152 }