libsmb/trusts_util.c

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/*
 *  Unix SMB/CIFS implementation.
 *  Routines to operate on various trust relationships
 *  Copyright (C) Andrew Bartlett                   2001
 *  Copyright (C) Rafal Szczesniak                  2003
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "includes.h"

/*********************************************************
 Change the domain password on the PDC.

 Just changes the password betwen the two values specified.

 Caller must have the cli connected to the netlogon pipe
 already.
**********************************************************/

static NTSTATUS just_change_the_password(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx, 
                                         const unsigned char orig_trust_passwd_hash[16],
                                         const char *new_trust_pwd_cleartext,
                                         const unsigned char new_trust_passwd_hash[16],
                                         uint32 sec_channel_type)
{
        NTSTATUS result;
        uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;

        result = rpccli_netlogon_setup_creds(cli,
                                        cli->cli->desthost, /* server name */
                                        lp_workgroup(), /* domain */
                                        global_myname(), /* client name */
                                        global_myname(), /* machine account name */
                                        orig_trust_passwd_hash,
                                        sec_channel_type,
                                        &neg_flags);

        if (!NT_STATUS_IS_OK(result)) {
                DEBUG(3,("just_change_the_password: unable to setup creds (%s)!\n",
                         nt_errstr(result)));
                return result;
        }

        if (neg_flags & NETLOGON_NEG_PASSWORD_SET2) {
                result = rpccli_net_srv_pwset2(cli, mem_ctx, global_myname(),
                                               new_trust_pwd_cleartext);
        } else {
                result = rpccli_net_srv_pwset(cli, mem_ctx, global_myname(),
                                              new_trust_passwd_hash);
        }

        if (!NT_STATUS_IS_OK(result)) {
                DEBUG(0,("just_change_the_password: unable to change password (%s)!\n",
                         nt_errstr(result)));
        }
        return result;
}

/*********************************************************
 Change the domain password on the PDC.
 Store the password ourselves, but use the supplied password
 Caller must have already setup the connection to the NETLOGON pipe
**********************************************************/

NTSTATUS trust_pw_change_and_store_it(struct rpc_pipe_client *cli, TALLOC_CTX *mem_ctx, 
                                      const char *domain,
                                      unsigned char orig_trust_passwd_hash[16],
                                      uint32 sec_channel_type)
{
        unsigned char new_trust_passwd_hash[16];
        char *new_trust_passwd;
        char *str;
        NTSTATUS nt_status;
                
        /* Create a random machine account password */
        str = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);

        if ((new_trust_passwd = talloc_strdup(mem_ctx, str)) == NULL) {
                DEBUG(0, ("talloc_strdup failed\n"));
                return NT_STATUS_NO_MEMORY;
        }
        
        E_md4hash(new_trust_passwd, new_trust_passwd_hash);

        nt_status = just_change_the_password(cli, mem_ctx, orig_trust_passwd_hash,
                                             new_trust_passwd,
                                             new_trust_passwd_hash, sec_channel_type);
        
        if (NT_STATUS_IS_OK(nt_status)) {
                DEBUG(3,("%s : trust_pw_change_and_store_it: Changed password.\n", 
                         current_timestring(False)));
                /*
                 * Return the result of trying to write the new password
                 * back into the trust account file.
                 */
                if (!secrets_store_machine_password(new_trust_passwd, domain, sec_channel_type)) {
                        nt_status = NT_STATUS_UNSUCCESSFUL;
                }
        }

        return nt_status;
}

/*********************************************************
 Change the domain password on the PDC.
 Do most of the legwork ourselfs.  Caller must have
 already setup the connection to the NETLOGON pipe
**********************************************************/

NTSTATUS trust_pw_find_change_and_store_it(struct rpc_pipe_client *cli, 
                                           TALLOC_CTX *mem_ctx, 
                                           const char *domain) 
{
        unsigned char old_trust_passwd_hash[16];
        uint32 sec_channel_type = 0;

        if (!secrets_fetch_trust_account_password(domain,
                                                  old_trust_passwd_hash, 
                                                  NULL, &sec_channel_type)) {
                DEBUG(0, ("could not fetch domain secrets for domain %s!\n", domain));
                return NT_STATUS_UNSUCCESSFUL;
        }
        
        return trust_pw_change_and_store_it(cli, mem_ctx, domain,
                                            old_trust_passwd_hash,
                                            sec_channel_type);
}

/*********************************************************************
 Enumerate the list of trusted domains from a DC
*********************************************************************/

BOOL enumerate_domain_trusts( TALLOC_CTX *mem_ctx, const char *domain,
                                     char ***domain_names, uint32 *num_domains,
                                     DOM_SID **sids )
{
        POLICY_HND      pol;
        NTSTATUS        result = NT_STATUS_UNSUCCESSFUL;
        fstring         dc_name;
        struct in_addr  dc_ip;
        uint32          enum_ctx = 0;
        struct cli_state *cli = NULL;
        struct rpc_pipe_client *lsa_pipe;
        BOOL            retry;

        *domain_names = NULL;
        *num_domains = 0;
        *sids = NULL;

        /* lookup a DC first */

        if ( !get_dc_name(domain, NULL, dc_name, &dc_ip) ) {
                DEBUG(3,("enumerate_domain_trusts: can't locate a DC for domain %s\n",
                        domain));
                return False;
        }

        /* setup the anonymous connection */

        result = cli_full_connection( &cli, global_myname(), dc_name, &dc_ip, 0, "IPC$", "IPC",
                "", "", "", 0, Undefined, &retry);
        if ( !NT_STATUS_IS_OK(result) )
                goto done;

        /* open the LSARPC_PIPE */

        lsa_pipe = cli_rpc_pipe_open_noauth( cli, PI_LSARPC, &result );
        if ( !lsa_pipe) {
                goto done;
        }

        /* get a handle */

        result = rpccli_lsa_open_policy(lsa_pipe, mem_ctx, True,
                POLICY_VIEW_LOCAL_INFORMATION, &pol);
        if ( !NT_STATUS_IS_OK(result) )
                goto done;

        /* Lookup list of trusted domains */

        result = rpccli_lsa_enum_trust_dom(lsa_pipe, mem_ctx, &pol, &enum_ctx,
                num_domains, domain_names, sids);
        if ( !NT_STATUS_IS_OK(result) )
                goto done;

done:
        /* cleanup */
        if (cli) {
                DEBUG(10,("enumerate_domain_trusts: shutting down connection...\n"));
                cli_shutdown( cli );
        }

        return NT_STATUS_IS_OK(result);
}

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