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/*
Unix SMB/CIFS implementation.
Winbind authentication mechnism
Copyright (C) Tim Potter 2000
Copyright (C) Andrew Bartlett 2001 - 2002
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 "passdb.h"
#include "nsswitch/libwbclient/wbclient.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/* Authenticate a user with a challenge/response */
static NTSTATUS check_winbind_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;
wbcErr wbc_status;
struct wbcAuthUserParams params;
struct wbcAuthUserInfo *info = NULL;
struct wbcAuthErrorInfo *err = NULL;
ZERO_STRUCT(params);
if (!user_info) {
return NT_STATUS_INVALID_PARAMETER;
}
DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
if (!auth_context) {
DEBUG(3,("Password for user %s cannot be checked because we have no auth_info to get the challenge from.\n",
user_info->mapped.account_name));
return NT_STATUS_INVALID_PARAMETER;
}
if (strequal(user_info->mapped.domain_name, get_global_sam_name())) {
DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
user_info->mapped.domain_name));
return NT_STATUS_NOT_IMPLEMENTED;
}
/* Send off request */
params.account_name = user_info->client.account_name;
/*
* We need to send the domain name from the client to the DC. With
* NTLMv2 the domain name is part of the hashed second challenge,
* if we change the domain name, the DC will fail to verify the
* challenge cause we changed the domain name, this is like a
* man in the middle attack.
*/
params.domain_name = user_info->client.domain_name;
params.workstation_name = user_info->workstation_name;
params.flags = 0;
params.parameter_control= user_info->logon_parameters;
params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
memcpy(params.password.response.challenge,
auth_context->challenge.data,
sizeof(params.password.response.challenge));
if (user_info->password.response.nt.length != 0) {
params.password.response.nt_length =
user_info->password.response.nt.length;
params.password.response.nt_data =
user_info->password.response.nt.data;
}
if (user_info->password.response.lanman.length != 0) {
params.password.response.lm_length =
user_info->password.response.lanman.length;
params.password.response.lm_data =
user_info->password.response.lanman.data;
}
/* we are contacting the privileged pipe */
become_root();
wbc_status = wbcAuthenticateUserEx(¶ms, &info, &err);
unbecome_root();
if (!WBC_ERROR_IS_OK(wbc_status)) {
DEBUG(10,("check_winbind_security: wbcAuthenticateUserEx failed: %s\n",
wbcErrorString(wbc_status)));
}
if (wbc_status == WBC_ERR_NO_MEMORY) {
return NT_STATUS_NO_MEMORY;
}
if (wbc_status == WBC_ERR_WINBIND_NOT_AVAILABLE) {
struct pdb_trusted_domain **domains = NULL;
uint32_t num_domains = 0;
NTSTATUS status;
if (lp_server_role() == ROLE_DOMAIN_MEMBER) {
status = NT_STATUS_NO_LOGON_SERVERS;
DBG_ERR("winbindd not running - "
"but required as domain member: %s\n",
nt_errstr(status));
return status;
}
status = pdb_enum_trusted_domains(talloc_tos(), &num_domains, &domains);
if (!NT_STATUS_IS_OK(status)) {
DBG_ERR("pdb_enum_trusted_domains() failed - %s\n",
nt_errstr(status));
return status;
}
TALLOC_FREE(domains);
if (num_domains == 0) {
DBG_DEBUG("winbindd not running - ignoring without "
"trusted domains\n");
return NT_STATUS_NOT_IMPLEMENTED;
}
status = NT_STATUS_NO_LOGON_SERVERS;
DBG_ERR("winbindd not running - "
"but required as DC with trusts: %s\n",
nt_errstr(status));
return status;
}
if (wbc_status == WBC_ERR_AUTH_ERROR) {
nt_status = NT_STATUS(err->nt_status);
if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) &&
(err->authoritative == 0)) {
/*
* Trigger a fallback to local SAM
*/
nt_status = NT_STATUS_NOT_IMPLEMENTED;
}
wbcFreeMemory(err);
return nt_status;
}
if (!WBC_ERROR_IS_OK(wbc_status)) {
return NT_STATUS_LOGON_FAILURE;
}
nt_status = make_server_info_wbcAuthUserInfo(mem_ctx,
user_info->client.account_name,
user_info->mapped.domain_name,
info, server_info);
wbcFreeMemory(info);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
(*server_info)->nss_token |= user_info->was_mapped;
return nt_status;
}
/* module initialisation */
static NTSTATUS auth_init_winbind(
struct auth_context *auth_context,
const char *param,
struct 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 = "winbind";
result->auth = check_winbind_security;
*auth_method = result;
return NT_STATUS_OK;
}
NTSTATUS auth_winbind_init(TALLOC_CTX *mem_ctx)
{
return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
}
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