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/*
* Copyright (C) 2021 Free Software Foundation, Inc.
*
* Author: Daiki Ueno
*
* This file is part of GnuTLS.
*
* GnuTLS 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.
*
* GnuTLS 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 GnuTLS. If not, see <https://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "cert-common.h"
#include "eagain-common.h"
#include "utils.h"
/* This tests TLS 1.3 middlebox compatibility mode. */
#define COMPAT_PRIO "NORMAL:-VERS-ALL:+VERS-TLS1.3"
#define NO_COMPAT_PRIO COMPAT_PRIO ":%DISABLE_TLS13_COMPAT_MODE"
#define HANDSHAKE_SESSION_ID_POS 34
struct data {
bool compat;
};
static int
handshake_callback(gnutls_session_t session, unsigned int htype,
unsigned post, unsigned int incoming,
const gnutls_datum_t *msg)
{
unsigned pos;
struct data *data;
uint8_t s;
assert(htype == GNUTLS_HANDSHAKE_CLIENT_HELLO);
assert(msg->size >= HANDSHAKE_SESSION_ID_POS);
data = gnutls_session_get_ptr(session);
pos = HANDSHAKE_SESSION_ID_POS;
if (pos + 1 > msg->size)
fail("error\n");
s = msg->data[pos];
if (data->compat && s == 0) {
fail("empty session ID while compat mode is enabled\n");
} else if (!data->compat && s > 0) {
fail("non-empty session ID while compat mode is disabled\n");
}
return 0;
}
static void
test(const char *name, bool client_compat, bool server_compat)
{
/* Server stuff. */
gnutls_certificate_credentials_t serverx509cred;
gnutls_session_t server;
int sret = GNUTLS_E_AGAIN;
/* Client stuff. */
gnutls_certificate_credentials_t clientx509cred;
gnutls_session_t client;
struct data data;
int cret = GNUTLS_E_AGAIN;
success("%s\n", name);
/* Init server */
assert(gnutls_certificate_allocate_credentials(&serverx509cred) >= 0);
gnutls_certificate_set_x509_key_mem(serverx509cred,
&server_cert, &server_key,
GNUTLS_X509_FMT_PEM);
assert(gnutls_init(&server, GNUTLS_SERVER) >= 0);
assert(gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE, serverx509cred) >= 0);
assert(gnutls_priority_set_direct(server,
server_compat ?
COMPAT_PRIO : NO_COMPAT_PRIO,
NULL) >= 0);
gnutls_transport_set_push_function(server, server_push);
gnutls_transport_set_pull_function(server, server_pull);
gnutls_transport_set_ptr(server, server);
/* Init client */
assert(gnutls_certificate_allocate_credentials(&clientx509cred) >= 0);
assert(gnutls_init(&client, GNUTLS_CLIENT) >= 0);
assert(gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,
clientx509cred) >= 0);
assert(gnutls_priority_set_direct(client,
client_compat ?
COMPAT_PRIO : NO_COMPAT_PRIO,
NULL) >= 0);
gnutls_transport_set_push_function(client, client_push);
gnutls_transport_set_pull_function(client, client_pull);
gnutls_transport_set_ptr(client, client);
data.compat = client_compat;
gnutls_session_set_ptr(client, &data);
gnutls_handshake_set_hook_function(client, GNUTLS_HANDSHAKE_CLIENT_HELLO,
GNUTLS_HOOK_POST,
handshake_callback);
HANDSHAKE(client, server);
gnutls_deinit(client);
gnutls_deinit(server);
gnutls_certificate_free_credentials(serverx509cred);
gnutls_certificate_free_credentials(clientx509cred);
}
void doit(void)
{
test("client compat, server compat", true, true);
test("client compat, server non-compat", true, false);
test("client non-compat, server compat", false, true);
test("client non-compat, server non-compat", false, false);
}
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