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Unix SMB/CIFS implementation.
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Authenticate against a remote domain
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Andrew Bartlett 2001
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#define DBGC_CLASS DBGC_AUTH
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extern BOOL global_machine_password_needs_changing;
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* Connect to a remote server for (inter)domain security authenticaion.
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* @param cli the cli to return containing the active connection
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* @param server either a machine name or text IP address to
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* @param setup_creds_as domain account to setup credentials as
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* @param sec_chan a switch value to distinguish between domain
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* member and interdomain authentication
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* @param trust_passwd the trust password to establish the
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static NTSTATUS connect_to_domain_password_server(struct cli_state **cli,
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struct rpc_pipe_client **pipe_ret,
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struct rpc_pipe_client *netlogon_pipe = NULL;
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/* TODO: Send a SAMLOGON request to determine whether this is a valid
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logonserver. We can avoid a 30-second timeout if the DC is down
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if the SAMLOGON request fails as it is only over UDP. */
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/* we use a mutex to prevent two connections at once - when a
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Win2k PDC get two connections where one hasn't completed a
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session setup yet it will send a TCP reset to the first
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connection (tridge) */
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* With NT4.x DC's *all* authentication must be serialized to avoid
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* ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
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if (!grab_server_mutex(dc_name)) {
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return NT_STATUS_NO_LOGON_SERVERS;
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/* Attempt connection */
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result = cli_full_connection(cli, global_myname(), dc_name, &dc_ip, 0,
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"IPC$", "IPC", "", "", "", 0, Undefined, retry);
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if (!NT_STATUS_IS_OK(result)) {
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/* map to something more useful */
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if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
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result = NT_STATUS_NO_LOGON_SERVERS;
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release_server_mutex();
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* We now have an anonymous connection to IPC$ on the domain password server.
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* Even if the connect succeeds we need to setup the netlogon
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* pipe here. We do this as we may just have changed the domain
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* account password on the PDC and yet we may be talking to
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* a BDC that doesn't have this replicated yet. In this case
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* a successful connect to a DC needs to take the netlogon connect
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* into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
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/* open the netlogon pipe. */
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if (lp_client_schannel()) {
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/* We also setup the creds chain in the open_schannel call. */
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netlogon_pipe = cli_rpc_pipe_open_schannel(*cli, PI_NETLOGON,
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PIPE_AUTH_LEVEL_PRIVACY, domain, &result);
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netlogon_pipe = cli_rpc_pipe_open_noauth(*cli, PI_NETLOGON, &result);
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DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
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machine %s. Error was : %s.\n", dc_name, nt_errstr(result)));
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release_server_mutex();
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if (!lp_client_schannel()) {
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/* We need to set up a creds chain on an unauthenticated netlogon pipe. */
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uint32 neg_flags = NETLOGON_NEG_AUTH2_FLAGS;
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uint32 sec_chan_type = 0;
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unsigned char machine_pwd[16];
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if (!get_trust_pw(domain, machine_pwd, &sec_chan_type)) {
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DEBUG(0, ("connect_to_domain_password_server: could not fetch "
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"trust account password for domain '%s'\n",
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release_server_mutex();
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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result = rpccli_netlogon_setup_creds(netlogon_pipe,
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dc_name, /* server name */
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global_myname(), /* client name */
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global_myname(), /* machine account name */
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if (!NT_STATUS_IS_OK(result)) {
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release_server_mutex();
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DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
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machine %s. Error was : %s.\n", dc_name, cli_errstr(*cli)));
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release_server_mutex();
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return NT_STATUS_NO_LOGON_SERVERS;
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/* We exit here with the mutex *locked*. JRA */
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*pipe_ret = netlogon_pipe;
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/***********************************************************************
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Do the same as security=server, but using NT Domain calls and a session
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key from the machine password. If the server parameter is specified
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use it, otherwise figure out a server from the 'password server' param.
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************************************************************************/
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static NTSTATUS domain_client_validate(TALLOC_CTX *mem_ctx,
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const auth_usersupplied_info *user_info,
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auth_serversupplied_info **server_info,
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struct in_addr dc_ip)
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NET_USER_INFO_3 info3;
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struct cli_state *cli = NULL;
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struct rpc_pipe_client *netlogon_pipe = NULL;
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NTSTATUS nt_status = NT_STATUS_NO_LOGON_SERVERS;
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* At this point, smb_apasswd points to the lanman response to
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* the challenge in local_challenge, and smb_ntpasswd points to
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* the NT response to the challenge in local_challenge. Ship
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* these over the secure channel to a domain controller and
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* see if they were valid.
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/* rety loop for robustness */
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for (i = 0; !NT_STATUS_IS_OK(nt_status) && retry && (i < 3); i++) {
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nt_status = connect_to_domain_password_server(&cli,
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if ( !NT_STATUS_IS_OK(nt_status) ) {
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DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
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if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
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return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE;
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/* store a successful connection */
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saf_store( domain, cli->desthost );
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* If this call succeeds, we now have lots of info about the user
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* in the info3 structure.
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nt_status = rpccli_netlogon_sam_network_logon(netlogon_pipe,
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user_info->logon_parameters,/* flags such as 'allow workstation logon' */
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dc_name, /* server name */
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user_info->smb_name, /* user name logging on. */
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user_info->domain, /* domain name */
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user_info->wksta_name, /* workstation name */
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chal, /* 8 byte challenge. */
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user_info->lm_resp, /* lanman 24 byte response */
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user_info->nt_resp, /* nt 24 byte response */
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&info3); /* info3 out */
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/* Let go as soon as possible so we avoid any potential deadlocks
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with winbind lookup up users or groups. */
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release_server_mutex();
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if (!NT_STATUS_IS_OK(nt_status)) {
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DEBUG(0,("domain_client_validate: unable to validate password "
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"for user %s in domain %s to Domain controller %s. "
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"Error was %s.\n", user_info->smb_name,
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user_info->domain, dc_name,
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nt_errstr(nt_status)));
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/* map to something more useful */
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if (NT_STATUS_EQUAL(nt_status, NT_STATUS_UNSUCCESSFUL)) {
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nt_status = NT_STATUS_NO_LOGON_SERVERS;
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nt_status = make_server_info_info3(mem_ctx,
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if (NT_STATUS_IS_OK(nt_status)) {
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(*server_info)->was_mapped |= user_info->was_mapped;
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netsamlogon_cache_store( user_info->smb_name, &info3 );
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/* Note - once the cli stream is shutdown the mem_ctx used
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to allocate the other_sids and gids structures has been deleted - so
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these pointers are no longer valid..... */
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/****************************************************************************
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Check for a valid username and password in security=domain mode.
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****************************************************************************/
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static NTSTATUS check_ntdomain_security(const struct auth_context *auth_context,
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void *my_private_data,
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const auth_usersupplied_info *user_info,
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auth_serversupplied_info **server_info)
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NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
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const char *domain = lp_workgroup();
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struct in_addr dc_ip;
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if ( lp_server_role() != ROLE_DOMAIN_MEMBER ) {
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DEBUG(0,("check_ntdomain_security: Configuration error! Cannot use "
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"ntdomain auth method when not a member of a domain.\n"));
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return NT_STATUS_NOT_IMPLEMENTED;
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if (!user_info || !server_info || !auth_context) {
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DEBUG(1,("check_ntdomain_security: Critical variables not present. Failing.\n"));
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return NT_STATUS_INVALID_PARAMETER;
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* Check that the requested domain is not our own machine name.
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* If it is, we should never check the PDC here, we use our own local
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if(strequal(get_global_sam_name(), user_info->domain)) {
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DEBUG(3,("check_ntdomain_security: Requested domain was for this machine.\n"));
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return NT_STATUS_NOT_IMPLEMENTED;
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/* we need our DC to send the net_sam_logon() request to */
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if ( !get_dc_name(domain, NULL, dc_name, &dc_ip) ) {
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DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
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return NT_STATUS_NO_LOGON_SERVERS;
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nt_status = domain_client_validate(mem_ctx,
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(uchar *)auth_context->challenge.data,
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/* module initialisation */
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static NTSTATUS auth_init_ntdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
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if (!make_auth_methods(auth_context, auth_method)) {
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return NT_STATUS_NO_MEMORY;
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(*auth_method)->name = "ntdomain";
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(*auth_method)->auth = check_ntdomain_security;
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/****************************************************************************
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Check for a valid username and password in a trusted domain
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****************************************************************************/
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static NTSTATUS check_trustdomain_security(const struct auth_context *auth_context,
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void *my_private_data,
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const auth_usersupplied_info *user_info,
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auth_serversupplied_info **server_info)
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NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
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unsigned char trust_md4_password[16];
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char *trust_password;
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time_t last_change_time;
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struct in_addr dc_ip;
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if (!user_info || !server_info || !auth_context) {
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DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
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return NT_STATUS_INVALID_PARAMETER;
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* Check that the requested domain is not our own machine name or domain name.
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if( strequal(get_global_sam_name(), user_info->domain)) {
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DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
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return NT_STATUS_NOT_IMPLEMENTED;
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/* No point is bothering if this is not a trusted domain.
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This return makes "map to guest = bad user" work again.
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The logic is that if we know nothing about the domain, that
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user is not known to us and does not exist */
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if ( !is_trusted_domain( user_info->domain ) )
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return NT_STATUS_NOT_IMPLEMENTED;
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* Get the trusted account password for the trusted domain
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* No need to become_root() as secrets_init() is done at startup.
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if (!secrets_fetch_trusted_domain_password(user_info->domain, &trust_password,
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&sid, &last_change_time)) {
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DEBUG(0, ("check_trustdomain_security: could not fetch trust "
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"account password for domain %s\n",
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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#ifdef DEBUG_PASSWORD
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DEBUG(100, ("Trust password for domain %s is %s\n", user_info->domain,
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E_md4hash(trust_password, trust_md4_password);
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SAFE_FREE(trust_password);
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/* Test if machine password is expired and need to be changed */
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if (time(NULL) > last_change_time + (time_t)lp_machine_password_timeout())
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global_machine_password_needs_changing = True;
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/* use get_dc_name() for consistency even through we know that it will be
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if ( !get_dc_name(user_info->domain, NULL, dc_name, &dc_ip) ) {
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DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
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return NT_STATUS_NO_LOGON_SERVERS;
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nt_status = domain_client_validate(mem_ctx,
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(uchar *)auth_context->challenge.data,
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/* module initialisation */
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static NTSTATUS auth_init_trustdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
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if (!make_auth_methods(auth_context, auth_method)) {
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return NT_STATUS_NO_MEMORY;
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(*auth_method)->name = "trustdomain";
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(*auth_method)->auth = check_trustdomain_security;
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NTSTATUS auth_domain_init(void)
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smb_register_auth(AUTH_INTERFACE_VERSION, "trustdomain", auth_init_trustdomain);
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smb_register_auth(AUTH_INTERFACE_VERSION, "ntdomain", auth_init_ntdomain);
added
removed
source/auth/auth_domain.c
