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/*
* Copyright (C) 2018 Nikos Mavrogiannopoulos
*
* Author: Nikos Mavrogiannopoulos
*
* 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 Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <gnutls/gnutls.h>
#include "utils.h"
#include "eagain-common.h"
#include "cert-common.h"
/* Tests whether the post_client_hello callback can modify
* the avalable priorities. This is used by apache's mod_gnutls.
*/
const char *side;
static int pch_ok = 0;
const char *override_prio = NULL;
static int post_client_hello_callback(gnutls_session_t session)
{
if (override_prio) {
assert(gnutls_priority_set_direct(session, override_prio, NULL) >= 0);
}
pch_ok = 1;
return 0;
}
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
static
void start(const char *name, const char *client_prio, const char *server_prio, int expected)
{
/* 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;
int cret = GNUTLS_E_AGAIN;
success("trying %s\n", name);
pch_ok = 0;
/* General init. */
global_init();
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(4);
/* Init server */
assert(gnutls_certificate_allocate_credentials(&serverx509cred)>=0);
assert(gnutls_certificate_set_x509_key_mem(serverx509cred,
&server_cert, &server_key,
GNUTLS_X509_FMT_PEM)>=0);
assert(gnutls_init(&server, GNUTLS_SERVER)>=0);
gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE,
serverx509cred);
assert(gnutls_priority_set_direct(server, server_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);
gnutls_handshake_set_post_client_hello_function(server,
post_client_hello_callback);
assert(gnutls_certificate_allocate_credentials(&clientx509cred)>=0);
assert(gnutls_init(&client, GNUTLS_CLIENT)>=0);
gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,
clientx509cred);
assert(gnutls_priority_set_direct(client, client_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);
if (expected > 0) {
int ret;
HANDSHAKE(client, server);
ret = gnutls_protocol_get_version(client);
assert(expected == ret);
ret = gnutls_protocol_get_version(server);
assert(expected == ret);
} else {
HANDSHAKE_EXPECT(client, server, GNUTLS_E_AGAIN, GNUTLS_E_UNSUPPORTED_VERSION_PACKET);
}
gnutls_bye(client, GNUTLS_SHUT_RDWR);
gnutls_bye(server, GNUTLS_SHUT_RDWR);
gnutls_deinit(client);
gnutls_deinit(server);
gnutls_certificate_free_credentials(serverx509cred);
gnutls_certificate_free_credentials(clientx509cred);
gnutls_global_deinit();
if (pch_ok == 0)
fail("Post client hello callback wasn't called\n");
reset_buffers();
}
void doit(void)
{
override_prio = "NORMAL";
start("tls1.2-only", "NORMAL:-VERS-ALL:+VERS-TLS1.2", "NORMAL:-VERS-ALL:+VERS-TLS1.2", GNUTLS_TLS1_2);
start("tls1.3-only", "NORMAL:-VERS-ALL:+VERS-TLS1.3", "NORMAL:-VERS-ALL:+VERS-TLS1.3", GNUTLS_TLS1_3);
start("default", "NORMAL", "NORMAL", GNUTLS_TLS1_3);
override_prio = "NORMAL:-VERS-ALL:+VERS-TLS1.2";
start("default overriden to TLS1.2-only", "NORMAL", "NORMAL", GNUTLS_TLS1_2);
override_prio = NULL;
start("client tls1.2-only, server tls1.2-disabled",
"NORMAL:-VERS-ALL:+VERS-TLS1.2", "NORMAL:-VERS-TLS1.2:-VERS-TLS1.1:-VERS-TLS1.0:-VERS-SSL3.0", -1);
override_prio = "NORMAL:-VERS-ALL:+VERS-TLS1.2";
start("client tls1.2-only, server tls1.2-disabled initially, but allow it afterwards",
"NORMAL:-VERS-ALL:+VERS-TLS1.2", "NORMAL:-VERS-TLS1.2:-VERS-TLS1.1:-VERS-TLS1.0:-VERS-SSL3.0", GNUTLS_TLS1_2);
}
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