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-rw-r--r--source3/smbd/auth_domain.c417
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diff --git a/source3/smbd/auth_domain.c b/source3/smbd/auth_domain.c
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+/*
+ Unix SMB/Netbios implementation.
+ Version 1.9.
+ Authenticate against a remote domain
+ Copyright (C) Andrew Tridgell 1992-1998
+ Copyright (C) Andrew Bartlett 2001
+
+ 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"
+
+extern int DEBUGLEVEL;
+extern struct in_addr ipzero;
+
+BOOL global_machine_password_needs_changing = False;
+
+extern pstring global_myname;
+
+/***********************************************************************
+ Connect to a remote machine for domain security authentication
+ given a name or IP address.
+ ***********************************************************************/
+
+static BOOL connect_to_domain_password_server(struct cli_state *pcli,
+ char *server, unsigned char *trust_passwd)
+{
+ struct in_addr dest_ip;
+ fstring remote_machine;
+
+ if(cli_initialise(pcli) == NULL) {
+ DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
+ return False;
+ }
+
+ if (is_ipaddress(server)) {
+ struct in_addr to_ip;
+
+ /* we shouldn't have 255.255.255.255 forthe IP address of
+ a password server anyways */
+ if ((to_ip.s_addr=inet_addr(server)) == 0xFFFFFFFF) {
+ DEBUG (0,("connect_to_domain_password_server: inet_addr(%s) returned 0xFFFFFFFF!\n", server));
+ return False;
+ }
+
+ if (!name_status_find(0x20, to_ip, remote_machine)) {
+ DEBUG(0, ("connect_to_domain_password_server: Can't "
+ "resolve name for IP %s\n", server));
+ return False;
+ }
+ } else {
+ fstrcpy(remote_machine, server);
+ }
+
+ standard_sub_basic(remote_machine);
+ strupper(remote_machine);
+
+ if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
+ DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ if (ismyip(dest_ip)) {
+ DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
+ remote_machine));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ if (!cli_connect(pcli, remote_machine, &dest_ip)) {
+ DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
+machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
+ DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
+session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+ return False;
+ }
+
+ pcli->protocol = PROTOCOL_NT1;
+
+ if (!cli_negprot(pcli)) {
+ DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
+Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ if (pcli->protocol != PROTOCOL_NT1) {
+ DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
+ remote_machine));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ /*
+ * Do an anonymous session setup.
+ */
+
+ if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
+ DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
+Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ if (!(pcli->sec_mode & 1)) {
+ DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
+ remote_machine));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
+ DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
+Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ /*
+ * We now have an anonymous connection to IPC$ on the domain password server.
+ */
+
+ /*
+ * Even if the connect succeeds we need to setup the netlogon
+ * pipe here. We do this as we may just have changed the domain
+ * account password on the PDC and yet we may be talking to
+ * a BDC that doesn't have this replicated yet. In this case
+ * a successful connect to a DC needs to take the netlogon connect
+ * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
+ */
+
+ if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
+ DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
+machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
+ cli_nt_session_close(pcli);
+ cli_ulogoff(pcli);
+ cli_shutdown(pcli);
+ return False;
+ }
+
+ if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
+ DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
+%s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
+ cli_nt_session_close(pcli);
+ cli_ulogoff(pcli);
+ cli_shutdown(pcli);
+ return(False);
+ }
+
+ return True;
+}
+
+/***********************************************************************
+ Utility function to attempt a connection to an IP address of a DC.
+************************************************************************/
+
+static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip,
+ unsigned char *trust_passwd)
+{
+ fstring dc_name;
+
+ /*
+ * Ignore addresses we have already tried.
+ */
+
+ if (ip_equal(ipzero, *ip))
+ return False;
+
+ if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
+ return False;
+
+ return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
+}
+
+/***********************************************************************
+ We have been asked to dynamcially determine the IP addresses of
+ the PDC and BDC's for this DOMAIN, and query them in turn.
+************************************************************************/
+static BOOL find_connect_pdc(struct cli_state *pcli,
+ unsigned char *trust_passwd,
+ time_t last_change_time)
+{
+ struct in_addr *ip_list = NULL;
+ int count = 0;
+ int i;
+ BOOL connected_ok = False;
+ time_t time_now = time(NULL);
+ BOOL use_pdc_only = False;
+
+ /*
+ * If the time the machine password has changed
+ * was less than an hour ago then we need to contact
+ * the PDC only, as we cannot be sure domain replication
+ * has yet taken place. Bug found by Gerald (way to go
+ * Gerald !). JRA.
+ */
+
+ if (time_now - last_change_time < 3600)
+ use_pdc_only = True;
+
+ if (!get_dc_list(use_pdc_only, lp_workgroup(), &ip_list, &count))
+ return False;
+
+ /*
+ * Firstly try and contact a PDC/BDC who has the same
+ * network address as any of our interfaces.
+ */
+ for(i = 0; i < count; i++) {
+ if(!is_local_net(ip_list[i]))
+ continue;
+
+ if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
+ break;
+
+ ip_list[i] = ipzero; /* Tried and failed. */
+ }
+
+ /*
+ * Secondly try and contact a random PDC/BDC.
+ */
+ if(!connected_ok) {
+ i = (sys_random() % count);
+
+ if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
+ ip_list[i] = ipzero; /* Tried and failed. */
+ }
+
+ /*
+ * Finally go through the IP list in turn, ignoring any addresses
+ * we have already tried.
+ */
+ if(!connected_ok) {
+ /*
+ * Try and connect to any of the other IP addresses in the PDC/BDC list.
+ * Note that from a WINS server the #1 IP address is the PDC.
+ */
+ for(i = 0; i < count; i++) {
+ if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
+ break;
+ }
+ }
+
+ if(ip_list != NULL)
+ free((char *)ip_list);
+
+
+ return connected_ok;
+}
+
+/***********************************************************************
+ Do the same as security=server, but using NT Domain calls and a session
+ key from the machine password. If the server parameter is specified
+ use it, otherwise figure out a server from the 'password server' param.
+************************************************************************/
+
+uint32 domain_client_validate(const auth_usersupplied_info *user_info,
+ auth_serversupplied_info *server_info,
+ char *server)
+{
+ unsigned char trust_passwd[16];
+ fstring remote_machine;
+ char *p, *pserver;
+ NET_ID_INFO_CTR ctr;
+ NET_USER_INFO_3 info3;
+ struct cli_state cli;
+ uint32 smb_uid_low;
+ BOOL connected_ok = False;
+ time_t last_change_time;
+ uint32 nt_status;
+
+ /*
+ * Check that the requested domain is not our own machine name.
+ * If it is, we should never check the PDC here, we use our own local
+ * password file.
+ */
+
+ if(strequal(user_info->domain.str, global_myname)) {
+ DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ /*
+ * Get the machine account password for our primary domain
+ */
+ if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, &last_change_time))
+ {
+ DEBUG(0, ("domain_client_validate: could not fetch trust account password for domain %s\n", lp_workgroup()));
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ /* Test if machine password is expired and need to be changed */
+ if (time(NULL) > last_change_time + lp_machine_password_timeout())
+ {
+ global_machine_password_needs_changing = True;
+ }
+
+ /*
+ * At this point, smb_apasswd points to the lanman response to
+ * the challenge in local_challenge, and smb_ntpasswd points to
+ * the NT response to the challenge in local_challenge. Ship
+ * these over the secure channel to a domain controller and
+ * see if they were valid.
+ */
+
+ ZERO_STRUCT(cli);
+
+ /*
+ * Treat each name in the 'password server =' line as a potential
+ * PDC/BDC. Contact each in turn and try and authenticate.
+ */
+
+ if (server) {
+ p = server;
+ } else {
+ pserver = lp_passwordserver();
+ if (! *pserver) pserver = "*";
+ p = pserver;
+ }
+
+ while (!connected_ok &&
+ next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
+ if(strequal(remote_machine, "*")) {
+ connected_ok = find_connect_pdc(&cli, trust_passwd, last_change_time);
+ } else {
+ connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
+ }
+ }
+
+ if (!connected_ok) {
+ DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
+ cli_shutdown(&cli);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ /* We really don't care what LUID we give the user. */
+ generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
+
+ ZERO_STRUCT(info3);
+
+ cli_nt_login_network(&cli, user_info->domain.str, user_info->smb_username.str, smb_uid_low, user_info->chal,
+ user_info->lm_resp.buffer, user_info->lm_resp.len,
+ user_info->nt_resp.buffer, user_info->lm_resp.len,
+ &ctr, &info3);
+
+ cli_error(&cli, NULL, NULL, &nt_status);
+ if (nt_status != NT_STATUS_NOPROBLEMO) {
+ DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
+%s to Domain controller %s. Error was %s.\n", user_info->smb_username.str, user_info->domain.str, remote_machine, cli_errstr(&cli)));
+ }
+
+ /*
+ * Here, if we really want it, we have lots of info about the user in info3.
+ */
+
+#if 0
+ /*
+ * We don't actually need to do this - plus it fails currently with
+ * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
+ * send here. JRA.
+ */
+
+ if (nt_status == NT_STATUS_NOPROBLMO) {
+ if(cli_nt_logoff(&cli, &ctr) == False) {
+ DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
+%s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
+ nt_status = NT_STATUS_LOGON_FAILURE;
+ }
+ }
+#endif /* 0 */
+
+ /* Note - once the cli stream is shutdown the mem_ctx used
+ to allocate the other_sids and gids structures has been deleted - so
+ these pointers are no longer valid..... */
+
+ cli_nt_session_close(&cli);
+ cli_ulogoff(&cli);
+ cli_shutdown(&cli);
+ return nt_status;
+}
+
+/****************************************************************************
+ Check for a valid username and password in security=domain mode.
+****************************************************************************/
+
+uint32 check_domain_security(const auth_usersupplied_info *user_info,
+ auth_serversupplied_info *server_info)
+{
+ uint32 nt_status = NT_STATUS_LOGON_FAILURE;
+
+ if(lp_security() != SEC_DOMAIN)
+ return NT_STATUS_LOGON_FAILURE;
+
+ nt_status = domain_client_validate(user_info, server_info, NULL);
+
+ return nt_status;
+}
+
+
+