+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- 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"
-
-#undef DBGC_CLASS
-#define DBGC_CLASS DBGC_AUTH
-
-BOOL global_machine_password_needs_changing = False;
-
-
-/*
- resolve the name of a DC in ways appropriate for an ADS domain mode
- an ADS domain may not have Netbios enabled at all, so this is
- quite different from the RPC case
- Note that we ignore the 'server' parameter here. That has the effect of using
- the 'ADS server' smb.conf parameter, which is what we really want anyway
- */
-static NTSTATUS ads_resolve_dc(fstring remote_machine,
- struct ipv4_addr *dest_ip)
-{
- ADS_STRUCT *ads;
- ads = ads_init_simple();
- if (!ads) {
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- DEBUG(4,("ads_resolve_dc: realm=%s\n", ads->config.realm));
-
- ads->auth.flags |= ADS_AUTH_NO_BIND;
-
-#ifdef HAVE_ADS
- /* a full ads_connect() is actually overkill, as we don't srictly need
- to do the SASL auth in order to get the info we need, but libads
- doesn't offer a better way right now */
- ads_connect(ads);
-#endif
-
- fstrcpy(remote_machine, ads->config.ldap_server_name);
- strupper(remote_machine);
- *dest_ip = ads->ldap_ip;
- ads_destroy(&ads);
-
- if (!*remote_machine || is_zero_ip(*dest_ip)) {
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- DEBUG(4,("ads_resolve_dc: using server='%s' IP=%s\n",
- remote_machine, inet_ntoa(*dest_ip)));
-
- return NT_STATUS_OK;
-}
-
-/*
- resolve the name of a DC in ways appropriate for RPC domain mode
- this relies on the server supporting netbios and port 137 not being
- firewalled
- */
-static NTSTATUS rpc_resolve_dc(const char *server,
- fstring remote_machine,
- struct ipv4_addr *dest_ip)
-{
- if (is_ipaddress(server)) {
- struct ipv4_addr to_ip = interpret_addr2(server);
-
- /* we need to know the machines netbios name - this is a lousy
- way to find it, but until we have a RPC call that does this
- it will have to do */
- if (!name_status_find("*", 0x20, 0x20, to_ip, remote_machine)) {
- DEBUG(2, ("rpc_resolve_dc: Can't resolve name for IP %s\n", server));
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- *dest_ip = to_ip;
- return NT_STATUS_OK;
- }
-
- fstrcpy(remote_machine, server);
- strupper(remote_machine);
- if (!resolve_name(remote_machine, dest_ip, 0x20)) {
- DEBUG(1,("rpc_resolve_dc: Can't resolve address for %s\n",
- remote_machine));
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- DEBUG(4,("rpc_resolve_dc: using server='%s' IP=%s\n",
- remote_machine, inet_ntoa(*dest_ip)));
-
- return NT_STATUS_OK;
-}
-
-/**
- * Connect to a remote server for domain security authenticaion.
- *
- * @param cli the cli to return containing the active connection
- * @param server either a machine name or text IP address to
- * connect to.
- * @param trust_passwd the trust password to establish the
- * credentials with.
- *
- **/
-
-static NTSTATUS connect_to_domain_password_server(struct smbcli_state **cli,
- const char *server,
- const char *setup_creds_as,
- uint16_t sec_chan,
- const uint8_t *trust_passwd,
- BOOL *retry)
-{
- struct ipv4_addr dest_ip;
- fstring remote_machine;
- NTSTATUS result;
- uint32_t neg_flags = 0x000001ff;
-
- *retry = False;
-
- if (lp_security() == SEC_ADS)
- result = ads_resolve_dc(remote_machine, &dest_ip);
- else
- result = rpc_resolve_dc(server, remote_machine, &dest_ip);
-
- if (!NT_STATUS_IS_OK(result)) {
- DEBUG(2,("connect_to_domain_password_server: unable to resolve DC: %s\n",
- nt_errstr(result)));
- return result;
- }
-
- if (ismyip(dest_ip)) {
- DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
- remote_machine));
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- /* TODO: Send a SAMLOGON request to determine whether this is a valid
- logonserver. We can avoid a 30-second timeout if the DC is down
- if the SAMLOGON request fails as it is only over UDP. */
-
- /* we use a mutex to prevent two connections at once - when a
- Win2k PDC get two connections where one hasn't completed a
- session setup yet it will send a TCP reset to the first
- connection (tridge) */
-
- /*
- * With NT4.x DC's *all* authentication must be serialized to avoid
- * ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
- */
-
- *retry = True;
-
- if (!grab_server_mutex(server))
- return NT_STATUS_NO_LOGON_SERVERS;
-
- /* Attempt connection */
- result = smbcli_full_connection(NULL, cli, lp_netbios_name(), remote_machine,
- 0, "IPC$", NULL, "", "", "");
-
- if (!NT_STATUS_IS_OK(result)) {
- release_server_mutex();
- return result;
- }
-
- /*
- * We now have an anonymous connection to IPC$ 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(smbcli_nt_session_open(*cli, PI_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, smbcli_errstr(*cli)));
- smbcli_nt_session_close(*cli);
- smbcli_ulogoff(*cli);
- smbcli_shutdown(*cli);
- release_server_mutex();
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- snprintf((*cli)->mach_acct, sizeof((*cli)->mach_acct) - 1, "%s$", setup_creds_as);
-
- if (!(*cli)->mach_acct) {
- release_server_mutex();
- return NT_STATUS_NO_MEMORY;
- }
-
- result = smbcli_nt_setup_creds(*cli, sec_chan, trust_passwd, &neg_flags, 2);
-
- if (!NT_STATUS_IS_OK(result)) {
- DEBUG(0,("connect_to_domain_password_server: unable to setup the NETLOGON credentials to machine \
-%s. Error was : %s.\n", remote_machine, nt_errstr(result)));
- smbcli_nt_session_close(*cli);
- smbcli_ulogoff(*cli);
- smbcli_shutdown(*cli);
- release_server_mutex();
- return result;
- }
-
- /* We exit here with the mutex *locked*. JRA */
-
- return NT_STATUS_OK;
-}
-
-/***********************************************************************
- Utility function to attempt a connection to an IP address of a DC.
-************************************************************************/
-
-static NTSTATUS attempt_connect_to_dc(struct smbcli_state **cli,
- const char *domain,
- struct ipv4_addr *ip,
- const char *setup_creds_as,
- uint16_t sec_chan,
- const uint8_t *trust_passwd)
-{
- NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
- BOOL retry = True;
- fstring dc_name;
- int i;
-
- /*
- * Ignore addresses we have already tried.
- */
-
- if (is_zero_ip(*ip))
- return NT_STATUS_NO_LOGON_SERVERS;
-
- if (!lookup_dc_name(lp_netbios_name(), domain, ip, dc_name))
- return NT_STATUS_NO_LOGON_SERVERS;
-
- for (i = 0; (!NT_STATUS_IS_OK(ret)) && retry && (i < 3); i++)
- ret = connect_to_domain_password_server(cli, dc_name, setup_creds_as,
- sec_chan, trust_passwd, &retry);
- return ret;
-}
-
-/***********************************************************************
- We have been asked to dynamically determine the IP addresses of
- the PDC and BDC's for DOMAIN, and query them in turn.
-************************************************************************/
-static NTSTATUS find_connect_dc(struct smbcli_state **cli,
- const char *domain,
- const char *setup_creds_as,
- uint16_t sec_chan,
- uint8_t *trust_passwd,
- time_t last_change_time)
-{
- struct ipv4_addr dc_ip;
- fstring srv_name;
-
- if ( !rpc_find_dc(lp_workgroup(), srv_name, &dc_ip) ) {
- DEBUG(0,("find_connect_dc: Failed to find an DCs for %s\n", lp_workgroup()));
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- return attempt_connect_to_dc( cli, domain, &dc_ip, setup_creds_as,
- sec_chan, trust_passwd );
-}
-
-/***********************************************************************
- 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.
-************************************************************************/
-
-static NTSTATUS domain_client_validate(TALLOC_CTX *mem_ctx,
- const auth_usersupplied_info *user_info,
- const char *domain,
- uint8_t chal[8],
- auth_serversupplied_info **server_info,
- const char *server, const char *setup_creds_as,
- uint16_t sec_chan,
- uint8_t trust_passwd[16],
- time_t last_change_time)
-{
- fstring remote_machine;
- NET_USER_INFO_3 info3;
- struct smbcli_state *cli = NULL;
- NTSTATUS nt_status = NT_STATUS_NO_LOGON_SERVERS;
-
- /*
- * 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.
- */
-
- while (!NT_STATUS_IS_OK(nt_status) &&
- next_token(&server,remote_machine,LIST_SEP,sizeof(remote_machine))) {
- if(lp_security() != SEC_ADS && strequal(remote_machine, "*")) {
- nt_status = find_connect_dc(&cli, domain, setup_creds_as, sec_chan, trust_passwd, last_change_time);
- } else {
- int i;
- BOOL retry = True;
- for (i = 0; !NT_STATUS_IS_OK(nt_status) && retry && (i < 3); i++)
- nt_status = connect_to_domain_password_server(&cli, remote_machine, setup_creds_as,
- sec_chan, trust_passwd, &retry);
- }
- }
-
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
- return nt_status;
- }
-
- ZERO_STRUCT(info3);
-
- /*
- * If this call succeeds, we now have lots of info about the user
- * in the info3 structure.
- */
-
- nt_status = smbcli_netlogon_sam_network_logon(cli, mem_ctx,
- user_info->smb_name.str, user_info->domain.str,
- user_info->wksta_name.str, chal,
- user_info->lm_resp, user_info->nt_resp,
- &info3);
-
- if (!NT_STATUS_IS_OK(nt_status)) {
- 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_name.str,
- user_info->domain.str, cli->srv_name_slash,
- nt_errstr(nt_status)));
- } else {
- nt_status = make_server_info_info3(mem_ctx, user_info->internal_username.str,
- user_info->smb_name.str, domain, server_info, &info3);
-#if 0
- /* The stuff doesn't work right yet */
- SMB_ASSERT(sizeof((*server_info)->session_key) == sizeof(info3.user_sess_key));
- memcpy((*server_info)->session_key, info3.user_sess_key, sizeof((*server_info)->session_key)/* 16 */);
- SamOEMhash((*server_info)->session_key, trust_passwd, sizeof((*server_info)->session_key));
-#endif
-
- uni_group_cache_store_netlogon(mem_ctx, &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_IS_OK(status)) {
- if(smbcli_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, smbcli_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..... */
-
- smbcli_nt_session_close(cli);
- smbcli_ulogoff(cli);
- smbcli_shutdown(cli);
- release_server_mutex();
- return nt_status;
-}
-
-/****************************************************************************
- Check for a valid username and password in security=domain mode.
-****************************************************************************/
-
-static NTSTATUS check_ntdomain_security(const struct auth_context *auth_context,
- void *my_private_data,
- TALLOC_CTX *mem_ctx,
- const auth_usersupplied_info *user_info,
- auth_serversupplied_info **server_info)
-{
- NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
- char *password_server;
- uint8_t trust_passwd[16];
- time_t last_change_time;
- const char *domain = lp_workgroup();
-
- if (!user_info || !server_info || !auth_context) {
- DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- /*
- * 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(is_myname(user_info->domain.str)) {
- DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
- return NT_STATUS_LOGON_FAILURE;
- }
-
- /*
- * Get the machine account password for our primary domain
- * No need to become_root() as secrets_init() is done at startup.
- */
-
- if (!secrets_fetch_trust_account_password(domain, trust_passwd, &last_change_time))
- {
- DEBUG(0, ("check_ntdomain_security: could not fetch trust account password for domain '%s'\n", domain));
- return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
- }
-
- /* Test if machine password has expired and needs to be changed */
- if (lp_machine_password_timeout()) {
- if (last_change_time > 0 &&
- time(NULL) > (last_change_time +
- lp_machine_password_timeout())) {
- global_machine_password_needs_changing = True;
- }
- }
-
- /*
- * Treat each name in the 'password server =' line as a potential
- * PDC/BDC. Contact each in turn and try and authenticate.
- */
-
- password_server = lp_passwordserver();
-
- nt_status = domain_client_validate(mem_ctx, user_info, domain,
- (uint8_t *)auth_context->challenge.data,
- server_info,
- password_server, lp_netbios_name(), SEC_CHAN_WKSTA, trust_passwd, last_change_time);
- return nt_status;
-}
-
-/* module initialisation */
-NTSTATUS auth_init_ntdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
-{
- if (!make_auth_methods(auth_context, auth_method)) {
- return NT_STATUS_NO_MEMORY;
- }
-
- (*auth_method)->name = "ntdomain";
- (*auth_method)->auth = check_ntdomain_security;
- return NT_STATUS_OK;
-}
-
-
-/****************************************************************************
- Check for a valid username and password in a trusted domain
-****************************************************************************/
-
-static NTSTATUS check_trustdomain_security(const struct auth_context *auth_context,
- void *my_private_data,
- TALLOC_CTX *mem_ctx,
- const auth_usersupplied_info *user_info,
- auth_serversupplied_info **server_info)
-{
- NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
- uint8_t trust_md4_password[16];
- char *trust_password;
- time_t last_change_time;
- DOM_SID sid;
-
- if (!user_info || !server_info || !auth_context) {
- DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- /*
- * 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(is_myname(user_info->domain.str)) {
- DEBUG(3,("check_trustdomain_security: Requested domain was for this machine.\n"));
- return NT_STATUS_LOGON_FAILURE;
- }
-
- /*
- * Check that the requested domain is not our own domain,
- * If it is, we should use our own local password file.
- */
-
- if(strequal(lp_workgroup(), (user_info->domain.str))) {
- DEBUG(3,("check_trustdomain_security: Requested domain was for this domain.\n"));
- return NT_STATUS_LOGON_FAILURE;
- }
-
- /*
- * Get the trusted account password for the trusted domain
- * No need to become_root() as secrets_init() is done at startup.
- */
-
- if (!secrets_fetch_trusted_domain_password(user_info->domain.str, &trust_password, &sid, &last_change_time))
- {
- DEBUG(0, ("check_trustdomain_security: could not fetch trust account password for domain %s\n", user_info->domain.str));
- return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
- }
-
-#ifdef DEBUG_PASSWORD
- DEBUG(100, ("Trust password for domain %s is %s\n", user_info->domain.str, trust_password));
-#endif
- E_md4hash(trust_password, trust_md4_password);
- SAFE_FREE(trust_password);
-
-#if 0
- /* 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;
- }
-#endif
-
- nt_status = domain_client_validate(mem_ctx, user_info, user_info->domain.str,
- (uint8_t *)auth_context->challenge.data,
- server_info, "*" /* Do a lookup */,
- lp_workgroup(), SEC_CHAN_DOMAIN, trust_md4_password, last_change_time);
-
- return nt_status;
-}
-
-/* module initialisation */
-NTSTATUS auth_init_trustdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
-{
- if (!make_auth_methods(auth_context, auth_method)) {
- return NT_STATUS_NO_MEMORY;
- }
-
- (*auth_method)->name = "trustdomain";
- (*auth_method)->auth = check_trustdomain_security;
- return NT_STATUS_OK;
-}
git.samba.org / ira / wip.git / commitdiff