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/*
Unix SMB/CIFS implementation.
Winbind authentication mechnism
Copyright (C) Tim Potter 2000
Copyright (C) Andrew Bartlett 2001 - 2002
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 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 "auth/auth.h"
#include "nsswitch/winbind_client.h"
#include "librpc/gen_ndr/ndr_netlogon.h"
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 = (uint8_t *)(((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;
}
}
static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info)
{
if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
return NT_STATUS_NOT_IMPLEMENTED;
}
/* TODO: maybe limit the user scope to remote users only */
return NT_STATUS_OK;
}
/* Authenticate a user with a challenge/response */
static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
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;
/* Send off request */
const struct auth_usersupplied_info *user_info_temp;
nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
AUTH_PASSWORD_RESPONSE,
user_info, &user_info_temp);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
user_info = user_info_temp;
ZERO_STRUCT(request);
ZERO_STRUCT(response);
request.flags = WBFLAG_PAM_INFO3_NDR;
request.data.auth_crap.logon_parameters = user_info->logon_parameters;
winbind_strcpy(request.data.auth_crap.user,
user_info->client.account_name);
winbind_strcpy(request.data.auth_crap.domain,
user_info->client.domain_name);
winbind_strcpy(request.data.auth_crap.workstation,
user_info->workstation_name);
memcpy(request.data.auth_crap.chal, ctx->auth_ctx->challenge.data.data, sizeof(request.data.auth_crap.chal));
request.data.auth_crap.lm_resp_len = MIN(user_info->password.response.lanman.length,
sizeof(request.data.auth_crap.lm_resp));
request.data.auth_crap.nt_resp_len = MIN(user_info->password.response.nt.length,
sizeof(request.data.auth_crap.nt_resp));
memcpy(request.data.auth_crap.lm_resp, user_info->password.response.lanman.data,
request.data.auth_crap.lm_resp_len);
memcpy(request.data.auth_crap.nt_resp, user_info->password.response.nt.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);
NT_STATUS_NOT_OK_RETURN(nt_status);
if (result == NSS_STATUS_SUCCESS && response.extra_data) {
union netr_Validation validation;
nt_status = get_info3_from_ndr(mem_ctx, &response, &info3);
SAFE_FREE(response.extra_data);
NT_STATUS_NOT_OK_RETURN(nt_status);
validation.sam3 = &info3;
nt_status = make_server_info_netlogon_validation(mem_ctx,
user_info->client.account_name,
3, &validation,
server_info);
return nt_status;
} 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->client.domain_name, user_info->client.account_name));
return 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->client.domain_name, user_info->client.account_name));
return NT_STATUS_NO_LOGON_SERVERS;
}
return nt_status;
}
static const struct auth_operations winbind_ops = {
.name = "winbind",
.get_challenge = auth_get_challenge_not_implemented,
.want_check = winbind_want_check,
.check_password = winbind_check_password
};
NTSTATUS auth_winbind_init(void)
{
NTSTATUS ret;
ret = auth_register(&winbind_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
return ret;
}
return ret;
}
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