+++ /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 3 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, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "auth.h"
-#include "../libcli/auth/libcli_auth.h"
-#include "../librpc/gen_ndr/ndr_netlogon.h"
-#include "rpc_client/cli_pipe.h"
-#include "rpc_client/cli_netlogon.h"
-#include "secrets.h"
-#include "passdb.h"
-#include "libsmb/libsmb.h"
-#include "libcli/auth/netlogon_creds_cli.h"
-#include "libsmb/samlogon_cache.h"
-
-#undef DBGC_CLASS
-#define DBGC_CLASS DBGC_AUTH
-
-static struct named_mutex *mutex;
-
-/**
- * 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_ret,
- const char *domain,
- const char *dc_name,
- const struct sockaddr_storage *dc_ss,
- struct rpc_pipe_client **pipe_ret,
- TALLOC_CTX *mem_ctx,
- struct netlogon_creds_cli_context **creds_ret)
-{
- TALLOC_CTX *frame = talloc_stackframe();
- struct messaging_context *msg_ctx = server_messaging_context();
- NTSTATUS result;
- struct cli_state *cli = NULL;
- struct rpc_pipe_client *netlogon_pipe = NULL;
- struct netlogon_creds_cli_context *netlogon_creds = NULL;
-
- *cli_ret = NULL;
- *pipe_ret = NULL;
- *creds_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.
- */
-
- mutex = grab_named_mutex(NULL, dc_name, 10);
- if (mutex == NULL) {
- TALLOC_FREE(frame);
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- /* Attempt connection */
- result = cli_full_connection(&cli, lp_netbios_name(), dc_name, dc_ss, 0,
- "IPC$", "IPC", "", "", "", 0, SMB_SIGNING_IPC_DEFAULT);
-
- if (!NT_STATUS_IS_OK(result)) {
- /* map to something more useful */
- if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
- result = NT_STATUS_NO_LOGON_SERVERS;
- }
-
- TALLOC_FREE(mutex);
- TALLOC_FREE(frame);
- return result;
- }
-
- /*
- * We now have an anonymous connection to IPC$ on the domain password server.
- */
-
- result = cli_rpc_pipe_open_schannel(cli,
- msg_ctx,
- &ndr_table_netlogon,
- NCACN_NP,
- domain,
- &netlogon_pipe,
- frame,
- &netlogon_creds);
- if (!NT_STATUS_IS_OK(result)) {
- 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);
- TALLOC_FREE(mutex);
- TALLOC_FREE(frame);
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- /* We exit here with the mutex *locked*. JRA */
-
- *cli_ret = cli;
- *pipe_ret = netlogon_pipe;
- *creds_ret = talloc_move(mem_ctx, &netlogon_creds);
-
- TALLOC_FREE(frame);
- 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 struct auth_usersupplied_info *user_info,
- const char *domain,
- uchar chal[8],
- struct auth_serversupplied_info **server_info,
- const char *dc_name,
- const struct sockaddr_storage *dc_ss)
-
-{
- TALLOC_CTX *frame = talloc_stackframe();
- struct netr_SamInfo3 *info3 = NULL;
- struct cli_state *cli = NULL;
- struct rpc_pipe_client *netlogon_pipe = NULL;
- struct netlogon_creds_cli_context *netlogon_creds = NULL;
- NTSTATUS nt_status = NT_STATUS_NO_LOGON_SERVERS;
- int i;
- uint8_t authoritative = 0;
- uint32_t flags = 0;
-
- /*
- * 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) && (i < 3); i++) {
- nt_status = connect_to_domain_password_server(&cli,
- domain,
- dc_name,
- dc_ss,
- &netlogon_pipe,
- frame,
- &netlogon_creds);
- }
-
- if ( !NT_STATUS_IS_OK(nt_status) ) {
- DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
- TALLOC_FREE(frame);
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_ACCESS_DENIED)) {
- return NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE;
- }
- return nt_status;
- }
-
- /* store a successful connection */
-
- saf_store(domain, dc_name);
-
- /*
- * If this call succeeds, we now have lots of info about the user
- * in the info3 structure.
- */
-
- nt_status = rpccli_netlogon_network_logon(netlogon_creds,
- netlogon_pipe->binding_handle,
- mem_ctx,
- user_info->logon_parameters, /* flags such as 'allow workstation logon' */
- user_info->client.account_name, /* user name logging on. */
- user_info->client.domain_name, /* domain name */
- user_info->workstation_name, /* workstation name */
- chal, /* 8 byte challenge. */
- user_info->password.response.lanman, /* lanman 24 byte response */
- user_info->password.response.nt, /* nt 24 byte response */
- &authoritative,
- &flags,
- &info3); /* info3 out */
-
- /* Let go as soon as possible so we avoid any potential deadlocks
- with winbind lookup up users or groups. */
-
- TALLOC_FREE(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->client.account_name,
- user_info->client.domain_name, 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;
- }
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) &&
- (authoritative == 0)) {
- nt_status = NT_STATUS_NOT_IMPLEMENTED;
- }
- } else {
- nt_status = make_server_info_info3(mem_ctx,
- user_info->client.account_name,
- domain,
- server_info,
- info3);
-
- if (NT_STATUS_IS_OK(nt_status)) {
- (*server_info)->nss_token |= user_info->was_mapped;
- netsamlogon_cache_store(user_info->client.account_name, info3);
- TALLOC_FREE(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);
- TALLOC_FREE(frame);
- 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 struct auth_usersupplied_info *user_info,
- struct auth_serversupplied_info **server_info)
-{
- NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
- const char *domain = lp_workgroup();
- fstring dc_name;
- struct sockaddr_storage dc_ss;
-
- 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;
- }
-
- DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
-
- /*
- * 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->mapped.domain_name)) {
- 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_ss) ) {
- DEBUG(5,("check_ntdomain_security: unable to locate a DC for domain %s\n",
- user_info->mapped.domain_name));
- 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_ss);
-
- return nt_status;
-}
-
-/* module initialisation */
-static NTSTATUS auth_init_ntdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
-{
- struct auth_methods *result;
-
- result = talloc_zero(auth_context, struct auth_methods);
- if (result == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- result->name = "ntdomain";
- result->auth = check_ntdomain_security;
-
- *auth_method = result;
- 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 struct auth_usersupplied_info *user_info,
- struct auth_serversupplied_info **server_info)
-{
- NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
- fstring dc_name;
- struct sockaddr_storage dc_ss;
-
- if (!user_info || !server_info || !auth_context) {
- DEBUG(1,("check_trustdomain_security: Critical variables not present. Failing.\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
-
- /*
- * Check that the requested domain is not our own machine name or domain name.
- */
-
- if( strequal(get_global_sam_name(), user_info->mapped.domain_name)) {
- DEBUG(3,("check_trustdomain_security: Requested domain [%s] was for this machine.\n",
- user_info->mapped.domain_name));
- 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->mapped.domain_name ) )
- return NT_STATUS_NOT_IMPLEMENTED;
-
- /* use get_dc_name() for consistency even through we know that it will be
- a netbios name */
-
- if ( !get_dc_name(user_info->mapped.domain_name, NULL, dc_name, &dc_ss) ) {
- DEBUG(5,("check_trustdomain_security: unable to locate a DC for domain %s\n",
- user_info->mapped.domain_name));
- return NT_STATUS_NO_LOGON_SERVERS;
- }
-
- nt_status = domain_client_validate(mem_ctx,
- user_info,
- user_info->mapped.domain_name,
- (uchar *)auth_context->challenge.data,
- server_info,
- dc_name,
- &dc_ss);
-
- return nt_status;
-}
-
-/* module initialisation */
-static NTSTATUS auth_init_trustdomain(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
-{
- struct auth_methods *result;
-
- result = talloc_zero(auth_context, struct auth_methods);
- if (result == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- result->name = "trustdomain";
- result->auth = check_trustdomain_security;
-
- *auth_method = result;
- return NT_STATUS_OK;
-}
-
-NTSTATUS auth_domain_init(TALLOC_CTX *mem_ctx)
-{
- smb_register_auth(AUTH_INTERFACE_VERSION, "trustdomain", auth_init_trustdomain);
- smb_register_auth(AUTH_INTERFACE_VERSION, "ntdomain", auth_init_ntdomain);
- return NT_STATUS_OK;
-}
git.samba.org / samba.git / commitdiff