/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
Authenticate against a remote domain
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Andrew Bartlett 2001
#include "includes.h"
-extern int DEBUGLEVEL;
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
BOOL global_machine_password_needs_changing = False;
+extern userdom_struct current_user_info;
+
+
+/*
+ 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 in_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 in_addr *dest_ip)
+{
+ if (is_ipaddress(server)) {
+ struct in_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 cli_state **cli,
+ const char *server,
+ const char *setup_creds_as,
+ uint16 sec_chan,
+ const unsigned char *trust_passwd,
+ BOOL *retry)
+{
+ struct in_addr dest_ip;
+ fstring remote_machine;
+ NTSTATUS result;
+ uint32 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 = cli_full_connection(cli, global_myname(), remote_machine,
+ &dest_ip, 0, "IPC$", "IPC", "", "", "",0, retry);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ release_server_mutex();
+ return result;
+ }
+
+ /*
+ * We now have an anonymous connection to IPC$ 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(cli_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, cli_errstr(*cli)));
+ cli_nt_session_close(*cli);
+ cli_ulogoff(*cli);
+ cli_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 = cli_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)));
+ cli_nt_session_close(*cli);
+ cli_ulogoff(*cli);
+ cli_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 cli_state **cli,
+ const char *domain,
+ struct in_addr *ip,
+ const char *setup_creds_as,
+ uint16 sec_chan,
+ const unsigned char *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(global_myname(), 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 cli_state **cli,
+ const char *domain,
+ const char *setup_creds_as,
+ uint16 sec_chan,
+ unsigned char *trust_passwd,
+ time_t last_change_time)
+{
+ struct in_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,
+ uchar chal[8],
+ auth_serversupplied_info **server_info,
+ const char *server, const char *setup_creds_as,
+ uint16 sec_chan,
+ unsigned char trust_passwd[16],
+ time_t last_change_time)
+{
+ fstring remote_machine;
+ NET_USER_INFO_3 info3;
+ struct cli_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 = cli_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(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);
+ release_server_mutex();
+ 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)
+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)
{
- uint32 nt_status = NT_STATUS_LOGON_FAILURE;
- char *p, *pserver;
+ NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
+ char *password_server;
unsigned char trust_passwd[16];
time_t last_change_time;
+ const char *domain = lp_workgroup();
- if(lp_security() != SEC_DOMAIN)
- return NT_STATUS_LOGON_FAILURE;
+ if (!user_info || !server_info || !auth_context) {
+ DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- become_root();
+ /*
+ * 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(lp_workgroup(), trust_passwd, &last_change_time))
+ if (!secrets_fetch_trust_account_password(domain, trust_passwd, &last_change_time))
{
- DEBUG(0, ("domain_client_validate: could not fetch trust account password for domain %s\n", lp_workgroup()));
- unbecome_root();
- return NT_STATUS_LOGON_FAILURE;
+ DEBUG(0, ("check_ntdomain_security: could not fetch trust account password for domain '%s'\n", domain));
+ return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
- unbecome_root();
-
- /* 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;
+ /* 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;
+ }
}
/*
* PDC/BDC. Contact each in turn and try and authenticate.
*/
- pserver = lp_passwordserver();
- if (! *pserver) pserver = "*";
- p = pserver;
-
- nt_status = domain_client_validate(user_info, server_info,
- p, trust_passwd, last_change_time);
+ password_server = lp_passwordserver();
+ nt_status = domain_client_validate(mem_ctx, user_info, domain,
+ (uchar *)auth_context->challenge.data,
+ server_info,
+ password_server, global_myname(), 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;
+ unsigned char 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,
+ (uchar *)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 / jra / samba / .git / blobdiff