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/*
Unix SMB/CIFS implementation.
Winbind client authentication mechanism designed to defer all
authentication to the winbind daemon.
Copyright (C) Tim Potter 2000
Copyright (C) Andrew Bartlett 2001 - 2002
Copyright (C) Dan Sledz 2009
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/>.
*/
/* This auth module is very similar to auth_winbind with 3 distinct
* differences.
*
* 1) Does not fallback to another auth module if winbindd is unavailable
* 2) Does not validate the domain of the user
* 3) Handles unencrypted passwords
*
* The purpose of this module is to defer all authentication decisions (ie:
* local user vs NIS vs LDAP vs AD; encrypted vs plaintext) to the wbc
* compatible daemon. This centeralizes all authentication decisions to a
* single provider.
*
* This auth backend is most useful when used in conjunction with pdb_wbc_sam.
*/
#include "includes.h"
#include "auth.h"
#include "nsswitch/libwbclient/wbclient.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/* Authenticate a user with a challenge/response */
static NTSTATUS check_wbc_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;
if (!user_info || !auth_context || !server_info) {
return NT_STATUS_INVALID_PARAMETER;
}
ZERO_STRUCT(params);
/* Send off request */
DEBUG(10, ("Check auth for: [%s]", user_info->mapped.account_name));
params.account_name = user_info->client.account_name;
params.domain_name = user_info->mapped.domain_name;
params.workstation_name = user_info->workstation_name;
params.flags = 0;
params.parameter_control= user_info->logon_parameters;
/* Handle plaintext */
switch (user_info->password_state) {
case AUTH_PASSWORD_PLAIN:
{
DEBUG(3,("Checking plaintext password for %s.\n",
user_info->mapped.account_name));
params.level = WBC_AUTH_USER_LEVEL_PLAIN;
params.password.plaintext = user_info->password.plaintext;
break;
}
case AUTH_PASSWORD_RESPONSE:
case AUTH_PASSWORD_HASH:
{
DEBUG(3,("Checking encrypted password for %s.\n",
user_info->mapped.account_name));
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;
}
break;
}
default:
DEBUG(0,("user_info constructed for user '%s' was invalid - password_state=%u invalid.\n",user_info->mapped.account_name, user_info->password_state));
return NT_STATUS_INTERNAL_ERROR;
#if 0 /* If ever implemented in libwbclient */
case AUTH_PASSWORD_HASH:
{
DEBUG(3,("Checking logon (hash) password for %s.\n",
user_info->mapped.account_name));
params.level = WBC_AUTH_USER_LEVEL_HASH;
if (user_info->password.hash.nt) {
memcpy(params.password.hash.nt_hash, user_info->password.hash.nt, sizeof(* user_info->password.hash.nt));
} else {
memset(params.password.hash.nt_hash, '\0', sizeof(params.password.hash.nt_hash));
}
if (user_info->password.hash.lanman) {
memcpy(params.password.hash.lm_hash, user_info->password.hash.lanman, sizeof(* user_info->password.hash.lanman));
} else {
memset(params.password.hash.lm_hash, '\0', sizeof(params.password.hash.lm_hash));
}
}
#endif
}
/* 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,("wbcAuthenticateUserEx failed (%d): %s\n",
wbc_status, wbcErrorString(wbc_status)));
}
if (wbc_status == WBC_ERR_NO_MEMORY) {
return NT_STATUS_NO_MEMORY;
}
if (wbc_status == WBC_ERR_AUTH_ERROR) {
nt_status = NT_STATUS(err->nt_status);
wbcFreeMemory(err);
return nt_status;
}
if (!WBC_ERROR_IS_OK(wbc_status)) {
return NT_STATUS_LOGON_FAILURE;
}
DEBUG(10,("wbcAuthenticateUserEx succeeded\n"));
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_wbc(struct auth_context *auth_context, const char *param, 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 = "wbc";
result->auth = check_wbc_security;
*auth_method = result;
return NT_STATUS_OK;
}
NTSTATUS auth_wbc_init(void)
{
return smb_register_auth(AUTH_INTERFACE_VERSION, "wbc", auth_init_wbc);
}
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