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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 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
static NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct winbindd_response *response, NET_USER_INFO_3 *info3)
{
uint8 *info3_ndr;
size_t len = response->length - sizeof(struct winbindd_response);
prs_struct ps;
if (len > 0) {
info3_ndr = response->extra_data;
if (!prs_init(&ps, len, mem_ctx, UNMARSHALL)) {
return NT_STATUS_NO_MEMORY;
}
prs_copy_data_in(&ps, (char *)info3_ndr, len);
prs_set_offset(&ps,0);
if (!net_io_user_info3("", info3, &ps, 1, 3, False)) {
DEBUG(2, ("get_info3_from_ndr: could not parse info3 struct!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
prs_mem_free(&ps);
return NT_STATUS_OK;
} else {
DEBUG(2, ("get_info3_from_ndr: No info3 struct found!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
}
/* 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 auth_usersupplied_info *user_info,
auth_serversupplied_info **server_info)
{
struct winbindd_request request;
struct winbindd_response response;
NSS_STATUS result;
NTSTATUS nt_status;
NET_USER_INFO_3 info3;
if (!user_info) {
return NT_STATUS_INVALID_PARAMETER;
}
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->internal_username.str));
return NT_STATUS_INVALID_PARAMETER;
}
if (strequal(user_info->domain.str, get_global_sam_name())) {
DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
user_info->domain.str));
return NT_STATUS_NOT_IMPLEMENTED;
}
/* Send off request */
ZERO_STRUCT(request);
ZERO_STRUCT(response);
request.flags = WBFLAG_PAM_INFO3_NDR;
request.data.auth_crap.logon_parameters = user_info->logon_parameters;
fstrcpy(request.data.auth_crap.user,
user_info->smb_name.str);
fstrcpy(request.data.auth_crap.domain,
user_info->domain.str);
fstrcpy(request.data.auth_crap.workstation,
user_info->wksta_name.str);
memcpy(request.data.auth_crap.chal, auth_context->challenge.data, sizeof(request.data.auth_crap.chal));
request.data.auth_crap.lm_resp_len = MIN(user_info->lm_resp.length,
sizeof(request.data.auth_crap.lm_resp));
request.data.auth_crap.nt_resp_len = MIN(user_info->nt_resp.length,
sizeof(request.data.auth_crap.nt_resp));
memcpy(request.data.auth_crap.lm_resp, user_info->lm_resp.data,
request.data.auth_crap.lm_resp_len);
memcpy(request.data.auth_crap.nt_resp, user_info->nt_resp.data,
request.data.auth_crap.nt_resp_len);
/* we are contacting the privileged pipe */
become_root();
result = winbindd_request_response(WINBINDD_PAM_AUTH_CRAP, &request, &response);
unbecome_root();
if ( result == NSS_STATUS_UNAVAIL ) {
struct auth_methods *auth_method = my_private_data;
if ( auth_method )
return auth_method->auth(auth_context, auth_method->private_data,
mem_ctx, user_info, server_info);
else
/* log an error since this should not happen */
DEBUG(0,("check_winbind_security: ERROR! my_private_data == NULL!\n"));
}
nt_status = NT_STATUS(response.data.auth.nt_status);
if (result == NSS_STATUS_SUCCESS && response.extra_data) {
if (NT_STATUS_IS_OK(nt_status)) {
if (NT_STATUS_IS_OK(nt_status = get_info3_from_ndr(mem_ctx, &response, &info3))) {
nt_status = make_server_info_info3(mem_ctx,
user_info->internal_username.str,
user_info->smb_name.str, user_info->domain.str,
server_info, &info3);
}
}
} else if (NT_STATUS_IS_OK(nt_status)) {
nt_status = NT_STATUS_NO_LOGON_SERVERS;
}
SAFE_FREE(response.extra_data);
return nt_status;
}
/* module initialisation */
static NTSTATUS auth_init_winbind(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 = "winbind";
(*auth_method)->auth = check_winbind_security;
if (param && *param) {
/* we load the 'fallback' module - if winbind isn't here, call this
module */
if (!load_auth_module(auth_context, param, (auth_methods **)&(*auth_method)->private_data)) {
return NT_STATUS_UNSUCCESSFUL;
}
}
return NT_STATUS_OK;
}
NTSTATUS auth_winbind_init(void)
{
return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
}
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