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/*
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* Copyright (C) 2016 Red Hat, Inc.
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*
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* Author: Nikos Mavrogiannopoulos
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*
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* This file is part of GnuTLS.
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*
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* GnuTLS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuTLS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GnuTLS; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <gnutls/gnutls.h>
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#include "utils.h"
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#include "eagain-common.h"
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/* This test checks whether the server switching certificates is detected
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* by the client */
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const char *side;
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static void tls_log_func(int level, const char *str)
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{
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fprintf(stderr, "%s|<%d>| %s", side, level, str);
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}
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#include "cert-common.h"
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static int
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pskfunc(gnutls_session_t session, const char *username,
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gnutls_datum_t * key)
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{
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if (debug)
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printf("psk: username %s\n", username);
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key->data = gnutls_malloc(4);
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key->data[0] = 0xDE;
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key->data[1] = 0xAD;
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key->data[2] = 0xBE;
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key->data[3] = 0xEF;
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key->size = 4;
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return 0;
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}
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static void try(const char *prio, gnutls_kx_algorithm_t kx, unsigned allow_change)
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{
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int ret;
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/* Server stuff. */
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gnutls_psk_server_credentials_t serverpskcred;
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gnutls_dh_params_t dh_params;
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const gnutls_datum_t p3 =
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{ (unsigned char *) pkcs3, strlen(pkcs3) };
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gnutls_session_t server;
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int sret = GNUTLS_E_AGAIN;
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/* Client stuff. */
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gnutls_psk_client_credentials_t clientpskcred;
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gnutls_psk_client_credentials_t clientpskcred2;
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gnutls_session_t client;
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const gnutls_datum_t key = { (void *) "DEADBEEF", 8 };
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int cret = GNUTLS_E_AGAIN;
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/* General init. */
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gnutls_global_set_log_function(tls_log_func);
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if (debug)
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gnutls_global_set_log_level(6);
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/* Init server */
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gnutls_psk_allocate_server_credentials(&serverpskcred);
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gnutls_psk_set_server_credentials_function(serverpskcred,
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pskfunc);
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gnutls_dh_params_init(&dh_params);
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gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);
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gnutls_psk_set_server_dh_params(serverpskcred, dh_params);
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if (allow_change)
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gnutls_init(&server, GNUTLS_SERVER|GNUTLS_ALLOW_ID_CHANGE);
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else
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gnutls_init(&server, GNUTLS_SERVER);
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gnutls_credentials_set(server, GNUTLS_CRD_PSK,
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serverpskcred);
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gnutls_priority_set_direct(server,
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prio,
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NULL);
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gnutls_transport_set_push_function(server, server_push);
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gnutls_transport_set_pull_function(server, server_pull);
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gnutls_transport_set_ptr(server, server);
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/* Init client */
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ret = gnutls_psk_allocate_client_credentials(&clientpskcred);
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if (ret < 0)
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exit(1);
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gnutls_psk_set_client_credentials(clientpskcred, "test1", &key,
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GNUTLS_PSK_KEY_HEX);
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ret = gnutls_psk_allocate_client_credentials(&clientpskcred2);
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if (ret < 0)
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exit(1);
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gnutls_psk_set_client_credentials(clientpskcred2, "test2", &key,
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GNUTLS_PSK_KEY_HEX);
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ret = gnutls_init(&client, GNUTLS_CLIENT);
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if (ret < 0)
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exit(1);
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ret = gnutls_credentials_set(client, GNUTLS_CRD_PSK,
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clientpskcred);
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if (ret < 0)
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exit(1);
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ret = gnutls_priority_set_direct(client, prio, NULL);
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if (ret < 0)
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exit(1);
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gnutls_transport_set_push_function(client, client_push);
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gnutls_transport_set_pull_function(client, client_pull);
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gnutls_transport_set_ptr(client, client);
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HANDSHAKE(client, server);
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if (gnutls_kx_get(client) != kx) {
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fail("got unexpected key exchange algorithm: %s (expected %s)\n",
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gnutls_kx_get_name(gnutls_kx_get(client)),
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gnutls_kx_get_name(kx));
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exit(1);
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}
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/* switch client's username and rehandshake */
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ret = gnutls_credentials_set(client, GNUTLS_CRD_PSK,
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clientpskcred2);
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if (ret < 0)
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exit(1);
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if (allow_change) {
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HANDSHAKE(client, server);
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} else {
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HANDSHAKE_EXPECT(client, server, GNUTLS_E_AGAIN, GNUTLS_E_SESSION_USER_ID_CHANGED);
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}
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gnutls_deinit(client);
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gnutls_deinit(server);
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gnutls_psk_free_server_credentials(serverpskcred);
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gnutls_psk_free_client_credentials(clientpskcred);
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gnutls_psk_free_client_credentials(clientpskcred2);
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gnutls_dh_params_deinit(dh_params);
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}
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void doit(void)
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{
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global_init();
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/* Allow change of ID */
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try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", GNUTLS_KX_PSK, 0);
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reset_buffers();
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try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+DHE-PSK", GNUTLS_KX_DHE_PSK, 0);
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reset_buffers();
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try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-PSK", GNUTLS_KX_ECDHE_PSK, 0);
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reset_buffers();
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/* Prohibit (default) change of ID */
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try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", GNUTLS_KX_PSK, 1);
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reset_buffers();
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try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+DHE-PSK", GNUTLS_KX_DHE_PSK, 1);
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reset_buffers();
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try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-PSK", GNUTLS_KX_ECDHE_PSK, 1);
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reset_buffers();
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gnutls_global_deinit();
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}
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