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/*
Unix SMB/CIFS implementation.
Anonymous Authentication
Copyright (C) Stefan Metzmacher 2004-2005
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 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 <tevent.h>
#include "auth/auth.h"
#include "auth/ntlm/auth_proto.h"
#include "param/param.h"
#include "lib/util/tevent_ntstatus.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
_PUBLIC_ NTSTATUS auth4_anonymous_init(TALLOC_CTX *);
/**
* Return a anonymous logon for anonymous users (username = "")
*
* Typically used as the first module in the auth chain, this allows
* anonymou logons to be dealt with in one place. Non-anonymou logons 'fail'
* and pass onto the next module.
**/
static NTSTATUS anonymous_want_check(struct auth_method_context *ctx,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info)
{
if (user_info->client.account_name && *user_info->client.account_name) {
return NT_STATUS_NOT_IMPLEMENTED;
}
switch (user_info->password_state) {
case AUTH_PASSWORD_PLAIN:
if (user_info->password.plaintext != NULL &&
strlen(user_info->password.plaintext) > 0)
{
return NT_STATUS_NOT_IMPLEMENTED;
}
break;
case AUTH_PASSWORD_HASH:
if (user_info->password.hash.lanman != NULL) {
return NT_STATUS_NOT_IMPLEMENTED;
}
if (user_info->password.hash.nt != NULL) {
return NT_STATUS_NOT_IMPLEMENTED;
}
break;
case AUTH_PASSWORD_RESPONSE:
if (user_info->password.response.lanman.length == 1) {
if (user_info->password.response.lanman.data[0] != '\0') {
return NT_STATUS_NOT_IMPLEMENTED;
}
} else if (user_info->password.response.lanman.length > 1) {
return NT_STATUS_NOT_IMPLEMENTED;
}
if (user_info->password.response.nt.length > 0) {
return NT_STATUS_NOT_IMPLEMENTED;
}
break;
}
return NT_STATUS_OK;
}
/**
* Return a anonymous logon for anonymous users (username = "")
*
* Typically used as the first module in the auth chain, this allows
* anonymou logons to be dealt with in one place. Non-anonymou logons 'fail'
* and pass onto the next module.
**/
struct anonymous_check_password_state {
struct auth_user_info_dc *user_info_dc;
};
static struct tevent_req *anonymous_check_password_send(
TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct auth_method_context *ctx,
const struct auth_usersupplied_info *user_info)
{
struct tevent_req *req = NULL;
struct anonymous_check_password_state *state = NULL;
NTSTATUS status;
req = tevent_req_create(
mem_ctx,
&state,
struct anonymous_check_password_state);
if (req == NULL) {
return NULL;
}
status = auth_anonymous_user_info_dc(
state,
lpcfg_netbios_name(ctx->auth_ctx->lp_ctx),
&state->user_info_dc);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS anonymous_check_password_recv(
struct tevent_req *req,
TALLOC_CTX *mem_ctx,
struct auth_user_info_dc **interim_info,
const struct authn_audit_info **client_audit_info,
const struct authn_audit_info **server_audit_info,
bool *authoritative)
{
struct anonymous_check_password_state *state = tevent_req_data(
req, struct anonymous_check_password_state);
NTSTATUS status;
*client_audit_info = NULL;
*server_audit_info = NULL;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*interim_info = talloc_move(mem_ctx, &state->user_info_dc);
tevent_req_received(req);
return NT_STATUS_OK;
}
static const struct auth_operations anonymous_auth_ops = {
.name = "anonymous",
.want_check = anonymous_want_check,
.check_password_send = anonymous_check_password_send,
.check_password_recv = anonymous_check_password_recv,
};
_PUBLIC_ NTSTATUS auth4_anonymous_init(TALLOC_CTX *ctx)
{
NTSTATUS ret;
ret = auth_register(ctx, &anonymous_auth_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register 'anonymous' auth backend!\n"));
return ret;
}
return ret;
}
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