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/*
Unix SMB/CIFS implementation.
Generic authentication types
Copyright (C) Andrew Bartlett 2001-2002
Copyright (C) Jelmer Vernooij 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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/**
* Return a guest logon for guest users (username = "")
*
* Typically used as the first module in the auth chain, this allows
* guest logons to be dealt with in one place. Non-guest logons 'fail'
* and pass onto the next module.
**/
static NTSTATUS check_guest_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)
{
/* mark this as 'not for me' */
NTSTATUS nt_status = NT_STATUS_NOT_IMPLEMENTED;
DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
if (!(user_info->mapped.account_name
&& *user_info->mapped.account_name)) {
nt_status = make_server_info_guest(NULL, server_info);
}
return nt_status;
}
/* Guest modules initialisation */
static NTSTATUS auth_init_guest(struct auth_context *auth_context, const char *options, 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->auth = check_guest_security;
result->name = "guest";
*auth_method = result;
return NT_STATUS_OK;
}
#ifdef DEVELOPER
/**
* Return an error based on username
*
* This function allows the testing of obsure errors, as well as the generation
* of NT_STATUS -> DOS error mapping tables.
*
* This module is of no value to end-users.
*
* The password is ignored.
*
* @return An NTSTATUS value based on the username
**/
static NTSTATUS check_name_to_ntstatus_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;
fstring user;
long error_num;
DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
fstrcpy(user, user_info->client.account_name);
if (strnequal("NT_STATUS", user, strlen("NT_STATUS"))) {
strupper_m(user);
return nt_status_string_to_code(user);
}
strlower_m(user);
error_num = strtoul(user, NULL, 16);
DEBUG(5,("check_name_to_ntstatus_security: Error for user %s was %lx\n", user, error_num));
nt_status = NT_STATUS(error_num);
return nt_status;
}
/** Module initialisation function */
static NTSTATUS auth_init_name_to_ntstatus(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->auth = check_name_to_ntstatus_security;
result->name = "name_to_ntstatus";
*auth_method = result;
return NT_STATUS_OK;
}
/**
* Return a 'fixed' challenge instead of a variable one.
*
* The idea of this function is to make packet snifs consistant
* with a fixed challenge, so as to aid debugging.
*
* This module is of no value to end-users.
*
* This module does not actually authenticate the user, but
* just pretenteds to need a specified challenge.
* This module removes *all* security from the challenge-response system
*
* @return NT_STATUS_UNSUCCESSFUL
**/
static NTSTATUS check_fixed_challenge_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)
{
return NT_STATUS_NOT_IMPLEMENTED;
}
/****************************************************************************
Get the challenge out of a password server.
****************************************************************************/
static DATA_BLOB auth_get_fixed_challenge(const struct auth_context *auth_context,
void **my_private_data,
TALLOC_CTX *mem_ctx)
{
const char *challenge = "I am a teapot";
return data_blob(challenge, 8);
}
/** Module initialisation function */
static NTSTATUS auth_init_fixed_challenge(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->auth = check_fixed_challenge_security;
result->get_chal = auth_get_fixed_challenge;
result->name = "fixed_challenge";
*auth_method = result;
return NT_STATUS_OK;
}
#endif /* DEVELOPER */
NTSTATUS auth_builtin_init(void)
{
smb_register_auth(AUTH_INTERFACE_VERSION, "guest", auth_init_guest);
#ifdef DEVELOPER
smb_register_auth(AUTH_INTERFACE_VERSION, "fixed_challenge", auth_init_fixed_challenge);
smb_register_auth(AUTH_INTERFACE_VERSION, "name_to_ntstatus", auth_init_name_to_ntstatus);
#endif
return NT_STATUS_OK;
}
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