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/*
* Copyright (C) 2016 Red Hat, Inc.
*
* 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 General Public License
* along with GnuTLS; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <gnutls/gnutls.h>
#include "utils.h"
#include "eagain-common.h"
/* This test checks whether the server switching certificates is detected
* by the client */
const char *side;
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
#include "cert-common.h"
static int
pskfunc(gnutls_session_t session, const char *username,
gnutls_datum_t * key)
{
if (debug)
printf("psk: username %s\n", username);
key->data = gnutls_malloc(4);
key->data[0] = 0xDE;
key->data[1] = 0xAD;
key->data[2] = 0xBE;
key->data[3] = 0xEF;
key->size = 4;
return 0;
}
static void try(const char *prio, gnutls_kx_algorithm_t kx, unsigned allow_change)
{
int ret;
/* Server stuff. */
gnutls_psk_server_credentials_t serverpskcred;
gnutls_dh_params_t dh_params;
const gnutls_datum_t p3 =
{ (unsigned char *) pkcs3, strlen(pkcs3) };
gnutls_session_t server;
int sret = GNUTLS_E_AGAIN;
/* Client stuff. */
gnutls_psk_client_credentials_t clientpskcred;
gnutls_psk_client_credentials_t clientpskcred2;
gnutls_session_t client;
const gnutls_datum_t key = { (void *) "DEADBEEF", 8 };
int cret = GNUTLS_E_AGAIN;
/* General init. */
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(6);
/* Init server */
gnutls_psk_allocate_server_credentials(&serverpskcred);
gnutls_psk_set_server_credentials_function(serverpskcred,
pskfunc);
gnutls_dh_params_init(&dh_params);
gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);
gnutls_psk_set_server_dh_params(serverpskcred, dh_params);
if (allow_change)
gnutls_init(&server, GNUTLS_SERVER|GNUTLS_ALLOW_ID_CHANGE);
else
gnutls_init(&server, GNUTLS_SERVER);
gnutls_credentials_set(server, GNUTLS_CRD_PSK,
serverpskcred);
gnutls_priority_set_direct(server,
prio,
NULL);
gnutls_transport_set_push_function(server, server_push);
gnutls_transport_set_pull_function(server, server_pull);
gnutls_transport_set_ptr(server, server);
/* Init client */
ret = gnutls_psk_allocate_client_credentials(&clientpskcred);
if (ret < 0)
exit(1);
gnutls_psk_set_client_credentials(clientpskcred, "test1", &key,
GNUTLS_PSK_KEY_HEX);
ret = gnutls_psk_allocate_client_credentials(&clientpskcred2);
if (ret < 0)
exit(1);
gnutls_psk_set_client_credentials(clientpskcred2, "test2", &key,
GNUTLS_PSK_KEY_HEX);
ret = gnutls_init(&client, GNUTLS_CLIENT);
if (ret < 0)
exit(1);
ret = gnutls_credentials_set(client, GNUTLS_CRD_PSK,
clientpskcred);
if (ret < 0)
exit(1);
ret = gnutls_priority_set_direct(client, prio, NULL);
if (ret < 0)
exit(1);
gnutls_transport_set_push_function(client, client_push);
gnutls_transport_set_pull_function(client, client_pull);
gnutls_transport_set_ptr(client, client);
HANDSHAKE(client, server);
if (gnutls_kx_get(client) != kx) {
fail("got unexpected key exchange algorithm: %s (expected %s)\n",
gnutls_kx_get_name(gnutls_kx_get(client)),
gnutls_kx_get_name(kx));
exit(1);
}
/* switch client's username and rehandshake */
ret = gnutls_credentials_set(client, GNUTLS_CRD_PSK,
clientpskcred2);
if (ret < 0)
exit(1);
if (allow_change) {
HANDSHAKE(client, server);
} else {
HANDSHAKE_EXPECT(client, server, GNUTLS_E_AGAIN, GNUTLS_E_SESSION_USER_ID_CHANGED);
}
gnutls_deinit(client);
gnutls_deinit(server);
gnutls_psk_free_server_credentials(serverpskcred);
gnutls_psk_free_client_credentials(clientpskcred);
gnutls_psk_free_client_credentials(clientpskcred2);
gnutls_dh_params_deinit(dh_params);
}
void doit(void)
{
global_init();
/* Allow change of ID */
try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", GNUTLS_KX_PSK, 0);
reset_buffers();
try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+DHE-PSK", GNUTLS_KX_DHE_PSK, 0);
reset_buffers();
try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-PSK", GNUTLS_KX_ECDHE_PSK, 0);
reset_buffers();
/* Prohibit (default) change of ID */
try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", GNUTLS_KX_PSK, 1);
reset_buffers();
try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+DHE-PSK", GNUTLS_KX_DHE_PSK, 1);
reset_buffers();
try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-PSK", GNUTLS_KX_ECDHE_PSK, 1);
reset_buffers();
gnutls_global_deinit();
}
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