source3/libsmb/trusts_util.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Routines to operate on various trust relationships
   4  *  Copyright (C) Andrew Bartlett                   2001
   5  *  Copyright (C) Rafal Szczesniak                  2003
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "includes.h"
  22 #include "../libcli/auth/libcli_auth.h"
  23 #include "rpc_client/cli_netlogon.h"
  24 #include "rpc_client/cli_pipe.h"
  25 #include "../librpc/gen_ndr/ndr_netlogon.h"
  26 #include "secrets.h"
  27 #include "passdb.h"
  28 #include "libsmb/libsmb.h"
  29
  30 /*********************************************************
  31  Change the domain password on the PDC.
  32  Store the password ourselves, but use the supplied password
  33  Caller must have already setup the connection to the NETLOGON pipe
  34 **********************************************************/
  35
  36 NTSTATUS trust_pw_change_and_store_it(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx,
  37                                       const char *domain,
  38                                       const char *account_name,
  39                                       unsigned char orig_trust_passwd_hash[16],
  40                                       enum netr_SchannelType sec_channel_type)
  41 {
  42         unsigned char new_trust_passwd_hash[16];
  43         char *new_trust_passwd;
  44         NTSTATUS nt_status;
  45
  46         switch (sec_channel_type) {
  47         case SEC_CHAN_WKSTA:
  48         case SEC_CHAN_DOMAIN:
  49                 break;
  50         default:
  51                 return NT_STATUS_NOT_SUPPORTED;
  52         }
  53
  54         /* Create a random machine account password */
  55         new_trust_passwd = generate_random_str(mem_ctx, DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
  56
  57         if (new_trust_passwd == NULL) {
  58                 DEBUG(0, ("talloc_strdup failed\n"));
  59                 return NT_STATUS_NO_MEMORY;
  60         }
  61
  62         E_md4hash(new_trust_passwd, new_trust_passwd_hash);
  63
  64         nt_status = rpccli_netlogon_set_trust_password(cli, mem_ctx,
  65                                                        account_name,
  66                                                        orig_trust_passwd_hash,
  67                                                        new_trust_passwd,
  68                                                        new_trust_passwd_hash,
  69                                                        sec_channel_type);
  70
  71         if (NT_STATUS_IS_OK(nt_status)) {
  72                 DEBUG(3,("%s : trust_pw_change_and_store_it: Changed password.\n",
  73                          current_timestring(talloc_tos(), False)));
  74                 /*
  75                  * Return the result of trying to write the new password
  76                  * back into the trust account file.
  77                  */
  78
  79                 switch (sec_channel_type) {
  80
  81                 case SEC_CHAN_WKSTA:
  82                         if (!secrets_store_machine_password(new_trust_passwd, domain, sec_channel_type)) {
  83                                 nt_status = NT_STATUS_UNSUCCESSFUL;
  84                         }
  85                         break;
  86
  87                 case SEC_CHAN_DOMAIN: {
  88                         char *pwd;
  89                         struct dom_sid sid;
  90                         time_t pass_last_set_time;
  91
  92                         /* we need to get the sid first for the
  93                          * pdb_set_trusteddom_pw call */
  94
  95                         if (!pdb_get_trusteddom_pw(domain, &pwd, &sid, &pass_last_set_time)) {
  96                                 nt_status = NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE;
  97                         }
  98                         if (!pdb_set_trusteddom_pw(domain, new_trust_passwd, &sid)) {
  99                                 nt_status = NT_STATUS_INTERNAL_DB_CORRUPTION;
 100                         }
 101                         break;
 102                 }
 103                 default:
 104                         break;
 105                 }
 106         }
 107
 108         return nt_status;
 109 }
 110
 111 /*********************************************************
 112  Change the domain password on the PDC.
 113  Do most of the legwork ourselfs.  Caller must have
 114  already setup the connection to the NETLOGON pipe
 115 **********************************************************/
 116
 117 NTSTATUS trust_pw_find_change_and_store_it(struct rpc_pipe_client *cli,
 118                                            TALLOC_CTX *mem_ctx,
 119                                            const char *domain)
 120 {
 121         unsigned char old_trust_passwd_hash[16];
 122         enum netr_SchannelType sec_channel_type = SEC_CHAN_NULL;
 123         const char *account_name;
 124
 125         if (!get_trust_pw_hash(domain, old_trust_passwd_hash, &account_name,
 126                                &sec_channel_type)) {
 127                 DEBUG(0, ("could not fetch domain secrets for domain %s!\n", domain));
 128                 return NT_STATUS_UNSUCCESSFUL;
 129         }
 130
 131         return trust_pw_change_and_store_it(cli, mem_ctx, domain,
 132                                             account_name,
 133                                             old_trust_passwd_hash,
 134                                             sec_channel_type);
 135 }
 136
 137 NTSTATUS change_trust_account_password( const char *domain, const char *remote_machine)
 138 {
 139         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
 140         struct sockaddr_storage pdc_ss;
 141         fstring dc_name;
 142         struct cli_state *cli = NULL;
 143         struct rpc_pipe_client *netlogon_pipe = NULL;
 144
 145         DEBUG(5,("change_trust_account_password: Attempting to change trust account password in domain %s....\n",
 146                 domain));
 147
 148         if (remote_machine == NULL || !strcmp(remote_machine, "*")) {
 149                 /* Use the PDC *only* for this */
 150
 151                 if ( !get_pdc_ip(domain, &pdc_ss) ) {
 152                         DEBUG(0,("Can't get IP for PDC for domain %s\n", domain));
 153                         goto failed;
 154                 }
 155
 156                 if ( !name_status_find( domain, 0x1b, 0x20, &pdc_ss, dc_name) )
 157                         goto failed;
 158         } else {
 159                 /* supoport old deprecated "smbpasswd -j DOMAIN -r MACHINE" behavior */
 160                 fstrcpy( dc_name, remote_machine );
 161         }
 162
 163         /* if this next call fails, then give up.  We can't do
 164            password changes on BDC's  --jerry */
 165
 166         if (!NT_STATUS_IS_OK(cli_full_connection(&cli, lp_netbios_name(), dc_name,
 167                                            NULL, 0,
 168                                            "IPC$", "IPC",
 169                                            "", "",
 170                                            "", 0, SMB_SIGNING_DEFAULT))) {
 171                 DEBUG(0,("modify_trust_password: Connection to %s failed!\n", dc_name));
 172                 nt_status = NT_STATUS_UNSUCCESSFUL;
 173                 goto failed;
 174         }
 175
 176         /*
 177          * Ok - we have an anonymous connection to the IPC$ share.
 178          * Now start the NT Domain stuff :-).
 179          */
 180
 181         /* Shouldn't we open this with schannel ? JRA. */
 182
 183         nt_status = cli_rpc_pipe_open_noauth(
 184                 cli, &ndr_table_netlogon.syntax_id, &netlogon_pipe);
 185         if (!NT_STATUS_IS_OK(nt_status)) {
 186                 DEBUG(0,("modify_trust_password: unable to open the domain client session to machine %s. Error was : %s.\n",
 187                         dc_name, nt_errstr(nt_status)));
 188                 cli_shutdown(cli);
 189                 cli = NULL;
 190                 goto failed;
 191         }
 192
 193         nt_status = trust_pw_find_change_and_store_it(
 194                 netlogon_pipe, netlogon_pipe, domain);
 195
 196         cli_shutdown(cli);
 197         cli = NULL;
 198
 199 failed:
 200         if (!NT_STATUS_IS_OK(nt_status)) {
 201                 DEBUG(0,("%s : change_trust_account_password: Failed to change password for domain %s.\n",
 202                         current_timestring(talloc_tos(), False), domain));
 203         }
 204         else
 205                 DEBUG(5,("change_trust_account_password: sucess!\n"));
 206
 207         return nt_status;
 208 }