--- /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
+
+extern BOOL global_machine_password_needs_changing;
+
+/**
+ * Connect to a remote server for (inter)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 setup_creds_as domain account to setup credentials as
+ * @param sec_chan a switch value to distinguish between domain
+ * member and interdomain authentication
+ * @param trust_passwd the trust password to establish the
+ * credentials with.
+ *
+ **/
+
+static NTSTATUS connect_to_domain_password_server(struct cli_state **cli,
+ const char *domain,
+ const char *dc_name,
+ struct in_addr dc_ip,
+ struct rpc_pipe_client **pipe_ret,
+ BOOL *retry)
+{
+ NTSTATUS result;
+ struct rpc_pipe_client *netlogon_pipe = NULL;
+
+ *pipe_ret = NULL;
+
+ /* 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.
+ */
+
+ if (!grab_server_mutex(dc_name)) {
+ return NT_STATUS_NO_LOGON_SERVERS;
+ }
+
+ /* Attempt connection */
+ *retry = True;
+ result = cli_full_connection(cli, global_myname(), dc_name, &dc_ip, 0,
+ "IPC$", "IPC", "", "", "", 0, Undefined, retry);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ /* map to something more useful */
+ if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
+ result = NT_STATUS_NO_LOGON_SERVERS;
+ }
+
+ release_server_mutex();
+ return result;
+ }
+
+ /*
+ * We now have an anonymous connection to IPC$ 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>.
+ */
+
+ /* open the netlogon pipe. */
+ if (lp_client_schannel()) {
+ /* We also setup the creds chain in the open_schannel call. */
+ netlogon_pipe = cli_rpc_pipe_open_schannel(*cli, PI_NETLOGON,
+ PIPE_AUTH_LEVEL_PRIVACY, domain, &result);
+ } else {
+ netlogon_pipe = cli_rpc_pipe_open_noauth(*cli, PI_NETLOGON, &result);
+ }
+
+ if(!netlogon_pipe) {
+ DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
+machine %s. Error was : %s.\n", dc_name, nt_errstr(result)));
+ cli_shutdown(*cli);
+ release_server_mutex();
+ return result;
+ }
+
+ if (!lp_client_schannel()) {
+ /* We need to set up a creds chain on an unauthenticated netlogon pipe. */
+ uint32 neg_flags = NETLOGON_NEG_AUTH2_FLAGS;
+ uint32 sec_chan_type = 0;
+ unsigned char machine_pwd[16];
+
+ if (!get_trust_pw(domain, machine_pwd, &sec_chan_type)) {
+ DEBUG(0, ("connect_to_domain_password_server: could not fetch "
+ "trust account password for domain '%s'\n",
+ domain));
+ cli_shutdown(*cli);
+ release_server_mutex();
+ return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+ }
+
+ result = rpccli_netlogon_setup_creds(netlogon_pipe,
+ dc_name, /* server name */
+ domain, /* domain */
+ global_myname(), /* client name */
+ global_myname(), /* machine account name */
+ machine_pwd,
+ sec_chan_type,
+ &neg_flags);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ cli_shutdown(*cli);
+ release_server_mutex();
+ return result;
+ }
+ }
+
+ if(!netlogon_pipe) {
+ DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
+machine %s. Error was : %s.\n", dc_name, cli_errstr(*cli)));
+ cli_shutdown(*cli);
+ release_server_mutex();
+ return NT_STATUS_NO_LOGON_SERVERS;
+ }
+
+ /* We exit here with the mutex *locked*. JRA */
+
+ *pipe_ret = netlogon_pipe;
+
+ return NT_STATUS_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.
+************************************************************************/
+
+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 *dc_name,
+ struct in_addr dc_ip)
+
+{
+ NET_USER_INFO_3 info3;
+ struct cli_state *cli = NULL;
+ struct rpc_pipe_client *netlogon_pipe = NULL;
+ NTSTATUS nt_status = NT_STATUS_NO_LOGON_SERVERS;
+ int i;
+ BOOL retry = 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.
+ */
+
+ /* rety loop for robustness */
+
+ for (i = 0; !NT_STATUS_IS_OK(nt_status) && retry && (i < 3); i++) {
+ nt_status = connect_to_domain_password_server(&cli,
+ domain,
+ dc_name,
+ dc_ip,
+ &netlogon_pipe,
+ &retry);
+ }
+
+ if ( !NT_STATUS_IS_OK(nt_status) ) {
+ DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
+ if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
+ return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE;
+ }
+ 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 = rpccli_netlogon_sam_network_logon(netlogon_pipe,
+ mem_ctx,
+ user_info->logon_parameters,/* flags such as 'allow workstation logon' */
+ dc_name, /* server name */
+ user_info->smb_name.str, /* user name logging on. */
+ user_info->domain.str, /* domain name */
+ user_info->wksta_name.str, /* workstation name */
+ chal, /* 8 byte challenge. */
+ user_info->lm_resp, /* lanman 24 byte response */
+ user_info->nt_resp, /* nt 24 byte response */
+ &info3); /* info3 out */
+
+ /* Let go as soon as possible so we avoid any potential deadlocks
+ with winbind lookup up users or groups. */
+
+ release_server_mutex();
+
+ 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, dc_name,
+ nt_errstr(nt_status)));
+
+ /* map to something more useful */
+ if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
+ nt_status = NT_STATUS_NO_LOGON_SERVERS;
+ }
+ } else {
+ nt_status = make_server_info_info3(mem_ctx,
+ user_info->internal_username.str,
+ user_info->smb_name.str,
+ domain,
+ server_info,
+ &info3);
+
+ netsamlogon_cache_store( user_info->smb_name.str, &info3 );
+ }
+
+ /* 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_shutdown(cli);
+ 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;
+ const char *domain = lp_workgroup();
+ fstring dc_name;
+ struct in_addr dc_ip;
+
+ if ( lp_server_role() != ROLE_DOMAIN_MEMBER ) {
+ DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
+ "ntdomain auth method when not a member of a domain.\n"));
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ 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(strequal(get_global_sam_name(), user_info->domain.str)) {
+ DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ /* we need our DC to send the net_sam_logon() request to */
+
+ if ( !get_dc_name(domain, NULL, dc_name, &dc_ip) ) {
+ DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
+ user_info->domain.str));
+ return NT_STATUS_NO_LOGON_SERVERS;
+ }
+
+ nt_status = domain_client_validate(mem_ctx,
+ user_info,
+ domain,
+ (uchar *)auth_context->challenge.data,
+ server_info,
+ dc_name,
+ dc_ip);
+
+ return nt_status;
+}
+
+/* module initialisation */
+static 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;
+ fstring dc_name;
+ struct in_addr dc_ip;
+
+ 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 or domain name.
+ */
+
+ if( strequal(get_global_sam_name(), user_info->domain.str)) {
+ DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
+ user_info->domain.str));
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ /* No point is bothering if this is not a trusted domain.
+ This return makes "map to guest = bad user" work again.
+ The logic is that if we know nothing about the domain, that
+ user is not known to us and does not exist */
+
+ if ( !is_trusted_domain( user_info->domain.str ) )
+ return NT_STATUS_NOT_IMPLEMENTED;
+
+ /*
+ * 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
+
+ /* use get_dc_name() for consistency even through we know that it will be
+ a netbios name */
+
+ if ( !get_dc_name(user_info->domain.str, NULL, dc_name, &dc_ip) ) {
+ DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
+ user_info->domain.str));
+ return NT_STATUS_NO_LOGON_SERVERS;
+ }
+
+ nt_status = domain_client_validate(mem_ctx,
+ user_info,
+ user_info->domain.str,
+ (uchar *)auth_context->challenge.data,
+ server_info,
+ dc_name,
+ dc_ip);
+
+ return nt_status;
+}
+
+/* module initialisation */
+static 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;
+}
+
+NTSTATUS auth_domain_init(void)
+{
+ smb_register_auth(AUTH_INTERFACE_VERSION, "trustdomain", auth_init_trustdomain);
+ smb_register_auth(AUTH_INTERFACE_VERSION, "ntdomain", auth_init_ntdomain);
+ return NT_STATUS_OK;
+}
projects / samba / blobdiff