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/*
Unix SMB/Netbios implementation.
Version 3.0
handle NLTMSSP, client server side parsing
Copyright (C) Andrew Tridgell 2001
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
Copyright (C) Stefan Metzmacher 2005
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 "system/network.h"
#include "lib/tsocket/tsocket.h"
#include "auth/ntlmssp/ntlmssp.h"
#include "../librpc/gen_ndr/ndr_ntlmssp.h"
#include "auth/ntlmssp/ntlmssp_ndr.h"
#include "auth/ntlmssp/ntlmssp_private.h"
#include "../libcli/auth/libcli_auth.h"
#include "../lib/crypto/crypto.h"
#include "auth/gensec/gensec.h"
#include "auth/gensec/gensec_internal.h"
#include "auth/common_auth.h"
#include "param/param.h"
#include "param/loadparm.h"
#include "libds/common/roles.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/**
* Return the credentials of a logged on user, including session keys
* etc.
*
* Only valid after a successful authentication
*
* May only be called once per authentication.
*
*/
NTSTATUS gensec_ntlmssp_session_info(struct gensec_security *gensec_security,
TALLOC_CTX *mem_ctx,
struct auth_session_info **session_info)
{
NTSTATUS nt_status;
struct gensec_ntlmssp_context *gensec_ntlmssp =
talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
uint32_t session_info_flags = 0;
if (gensec_security->want_features & GENSEC_FEATURE_UNIX_TOKEN) {
session_info_flags |= AUTH_SESSION_INFO_UNIX_TOKEN;
}
session_info_flags |= AUTH_SESSION_INFO_DEFAULT_GROUPS;
session_info_flags |= AUTH_SESSION_INFO_NTLM;
if (gensec_security->auth_context && gensec_security->auth_context->generate_session_info) {
nt_status = gensec_security->auth_context->generate_session_info(gensec_security->auth_context, mem_ctx,
gensec_ntlmssp->server_returned_info,
gensec_ntlmssp->ntlmssp_state->user,
session_info_flags,
session_info);
} else {
DEBUG(0, ("Cannot generate a session_info without the auth_context\n"));
return NT_STATUS_INTERNAL_ERROR;
}
NT_STATUS_NOT_OK_RETURN(nt_status);
nt_status = gensec_ntlmssp_session_key(gensec_security, *session_info,
&(*session_info)->session_key);
if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_USER_SESSION_KEY)) {
(*session_info)->session_key = data_blob_null;
nt_status = NT_STATUS_OK;
}
return nt_status;
}
/**
* Start NTLMSSP on the server side
*
*/
NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
{
NTSTATUS nt_status;
struct ntlmssp_state *ntlmssp_state;
struct gensec_ntlmssp_context *gensec_ntlmssp;
const char *netbios_name;
const char *netbios_domain;
const char *dns_name;
const char *dns_domain;
enum server_role role;
role = lpcfg_server_role(gensec_security->settings->lp_ctx);
nt_status = gensec_ntlmssp_start(gensec_security);
NT_STATUS_NOT_OK_RETURN(nt_status);
gensec_ntlmssp =
talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
ntlmssp_state = talloc_zero(gensec_ntlmssp,
struct ntlmssp_state);
if (!ntlmssp_state) {
return NT_STATUS_NO_MEMORY;
}
gensec_ntlmssp->ntlmssp_state = ntlmssp_state;
ntlmssp_state->role = NTLMSSP_SERVER;
ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
ntlmssp_state->allow_lm_response =
lpcfg_lanman_auth(gensec_security->settings->lp_ctx);
if (ntlmssp_state->allow_lm_response &&
gensec_setting_bool(gensec_security->settings,
"ntlmssp_server", "allow_lm_key", false))
{
ntlmssp_state->allow_lm_key = true;
}
ntlmssp_state->force_old_spnego = false;
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "force_old_spnego", false)) {
/*
* For testing Windows 2000 mode
*/
ntlmssp_state->force_old_spnego = true;
}
ntlmssp_state->neg_flags =
NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_VERSION;
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "128bit", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "56bit", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "keyexchange", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "alwayssign", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "ntlm2", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
}
if (ntlmssp_state->allow_lm_key) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
}
/*
* We always allow NTLMSSP_NEGOTIATE_SIGN and NTLMSSP_NEGOTIATE_SEAL.
*
* These will be removed if the client doesn't want them.
*/
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
if (role == ROLE_STANDALONE) {
ntlmssp_state->server.is_standalone = true;
} else {
ntlmssp_state->server.is_standalone = false;
}
if (gensec_security->settings->server_netbios_name) {
netbios_name = gensec_security->settings->server_netbios_name;
} else {
netbios_name = lpcfg_netbios_name(gensec_security->settings->lp_ctx);
}
if (gensec_security->settings->server_netbios_domain) {
netbios_domain = gensec_security->settings->server_netbios_domain;
} else {
netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
}
if (gensec_security->settings->server_dns_name) {
dns_name = gensec_security->settings->server_dns_name;
} else {
const char *dnsdomain = lpcfg_dnsdomain(gensec_security->settings->lp_ctx);
char *lower_netbiosname;
lower_netbiosname = strlower_talloc(ntlmssp_state, netbios_name);
NT_STATUS_HAVE_NO_MEMORY(lower_netbiosname);
/* Find out the DNS host name */
if (dnsdomain && dnsdomain[0] != '\0') {
dns_name = talloc_asprintf(ntlmssp_state, "%s.%s",
lower_netbiosname,
dnsdomain);
talloc_free(lower_netbiosname);
NT_STATUS_HAVE_NO_MEMORY(dns_name);
} else {
dns_name = lower_netbiosname;
}
}
if (gensec_security->settings->server_dns_domain) {
dns_domain = gensec_security->settings->server_dns_domain;
} else {
dns_domain = lpcfg_dnsdomain(gensec_security->settings->lp_ctx);
}
ntlmssp_state->server.netbios_name = talloc_strdup(ntlmssp_state, netbios_name);
NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.netbios_name);
ntlmssp_state->server.netbios_domain = talloc_strdup(ntlmssp_state, netbios_domain);
NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.netbios_domain);
ntlmssp_state->server.dns_name = talloc_strdup(ntlmssp_state, dns_name);
NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_name);
ntlmssp_state->server.dns_domain = talloc_strdup(ntlmssp_state, dns_domain);
NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_domain);
ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
return NT_STATUS_OK;
}
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