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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"
#include "librpc/gen_ndr/ndr_netlogon.h"
#include "auth/auth.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
static NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct winbindd_response *response, struct netr_SamInfo3 *info3)
{
size_t len = response->length - sizeof(struct winbindd_response);
if (len > 4) {
NTSTATUS status;
DATA_BLOB blob;
blob.length = len - 4;
blob.data = ((char *)response->extra_data) + 4;
status = ndr_pull_struct_blob(&blob, mem_ctx, info3,
(ndr_pull_flags_fn_t)ndr_pull_netr_SamInfo3);
return status;
} 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 struct auth_usersupplied_info *user_info,
struct auth_serversupplied_info **server_info)
{
struct winbindd_request request;
struct winbindd_response response;
NSS_STATUS result;
NTSTATUS nt_status;
struct netr_SamInfo3 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_UNSUCCESSFUL;
}
/* Send off request */
ZERO_STRUCT(request);
ZERO_STRUCT(response);
request.flags = WBFLAG_PAM_INFO3_NDR;
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);
result = winbindd_request(WINBINDD_PAM_AUTH_CRAP, &request, &response);
nt_status = NT_STATUS(response.data.auth.nt_status);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
if (result == NSS_STATUS_SUCCESS && response.extra_data) {
nt_status = get_info3_from_ndr(mem_ctx, &response, &info3);
if (NT_STATUS_IS_OK(nt_status)) {
union netr_Validation validation;
validation.sam3 = &info3;
nt_status =
make_server_info_netlogon_validation(mem_ctx,
user_info->internal_username.str,
server_info,
3,
&validation);
}
SAFE_FREE(response.extra_data);
} else if (result == NSS_STATUS_SUCCESS && !response.extra_data) {
DEBUG(0, ("Winbindd authenticated the user [%s]\\[%s], "
"but did not include the required info3 reply!\n",
user_info->smb_name.str, user_info->domain.str));
nt_status = NT_STATUS_INSUFFICIENT_LOGON_INFO;
} else if (NT_STATUS_IS_OK(nt_status)) {
DEBUG(1, ("Winbindd authentication for [%s]\\[%s] failed, "
"but no error code is available!\n",
user_info->smb_name.str, user_info->domain.str));
nt_status = NT_STATUS_NO_LOGON_SERVERS;
}
return nt_status;
}
/* module initialisation */
static NTSTATUS auth_init_winbind(struct auth_context *auth_context,
const char *param,
struct 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;
return NT_STATUS_OK;
}
NTSTATUS auth_winbind_init(void)
{
NTSTATUS ret;
struct auth_operations ops;
ops.name = "winbind";
ops.init = auth_init_winbind;
ret = register_backend("auth", &ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register '%s' auth backend!\n",
ops.name));
}
return ret;
}
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