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/*
* Copyright (C) 2004-2012 Free Software Foundation, Inc.
* Copyright (C) 2013 Adam Sampson <ats@offog.org>
* Copyright (C) 2019 Free Software Foundation, Inc.
* Copyright (C) 2023 Red Hat, Inc.
*
* Author: Simon Josefsson, Ander Juaristi, 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/>.
*/
/* This tests the external PSK importer interface (RFC 9258). */
/* Parts copied from pskself.c. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gnutls/gnutls.h>
#include "utils.h"
#include "eagain-common.h"
const char *side = "";
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
#define MAX_BUF 1024
#define MSG "Hello TLS"
static const gnutls_datum_t identity = { (unsigned char *)"\xCA\xFE\xCA\xFE",
4 };
static const gnutls_datum_t context = { (unsigned char *)"\xDE\xAD\xBE\xEF",
4 };
static const uint8_t expected_imported_identity[] = { 0x00, 0x04, 0xca, 0xfe,
0xca, 0xfe, 0x00, 0x04,
0xde, 0xad, 0xbe, 0xef,
0x03, 0x04, 0x00, 0x01 };
static int server_pskfunc(gnutls_session_t session,
const gnutls_datum_t *username, gnutls_datum_t *key,
gnutls_psk_key_flags *flags)
{
gnutls_datum_t imported_identity = { NULL, 0 };
int ret;
if (debug)
printf("psk: Got username with length %d\n", username->size);
key->data = gnutls_malloc(4);
key->data[0] = 0xDE;
key->data[1] = 0xAD;
key->data[2] = 0xBE;
key->data[3] = 0xEF;
key->size = 4;
ret = gnutls_psk_format_imported_identity(&identity, &context,
GNUTLS_TLS1_3,
GNUTLS_DIG_SHA256,
&imported_identity);
if (ret < 0) {
return -1;
}
if (imported_identity.size != sizeof(expected_imported_identity) ||
memcmp(imported_identity.data, expected_imported_identity,
imported_identity.size)) {
gnutls_free(imported_identity.data);
printf("Unexpected imported identity\n");
return -1;
}
gnutls_free(imported_identity.data);
if (flags) {
*flags = GNUTLS_PSK_KEY_EXT;
}
return 0;
}
static int client_pskfunc(gnutls_session_t session, gnutls_datum_t *username,
gnutls_datum_t *key, gnutls_psk_key_flags *flags)
{
int ret;
ret = gnutls_psk_format_imported_identity(&identity, &context,
GNUTLS_TLS1_3,
GNUTLS_DIG_SHA256, username);
if (ret < 0) {
return -1;
}
key->data = gnutls_malloc(4);
key->data[0] = 0xDE;
key->data[1] = 0xAD;
key->data[2] = 0xBE;
key->data[3] = 0xEF;
key->size = 4;
*flags = GNUTLS_PSK_KEY_EXT;
return 0;
}
static void run_test(const char *prio)
{
/* Server stuff. */
gnutls_psk_server_credentials_t server_pskcred;
gnutls_session_t server;
int sret;
/* Client stuff. */
gnutls_psk_client_credentials_t client_pskcred;
gnutls_session_t client;
int cret;
char buffer[MAX_BUF + 1];
int transferred = 0;
gnutls_datum_t psk_username;
success("%s\n", prio);
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(4711);
/* Init server */
gnutls_psk_allocate_server_credentials(&server_pskcred);
gnutls_psk_set_server_credentials_function3(server_pskcred,
server_pskfunc);
gnutls_init(&server, GNUTLS_SERVER);
gnutls_priority_set_direct(server, prio, NULL);
gnutls_credentials_set(server, GNUTLS_CRD_PSK, server_pskcred);
gnutls_transport_set_push_function(server, server_push);
gnutls_transport_set_pull_function(server, server_pull);
gnutls_transport_set_ptr(server, server);
/* Init client */
gnutls_psk_allocate_client_credentials(&client_pskcred);
gnutls_psk_set_client_credentials_function3(client_pskcred,
client_pskfunc);
gnutls_init(&client, GNUTLS_CLIENT);
gnutls_priority_set_direct(client, prio, NULL);
gnutls_credentials_set(client, GNUTLS_CRD_PSK, client_pskcred);
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 (debug) {
success("server: Handshake was completed\n");
if (gnutls_psk_server_get_username(server))
fail("server: gnutls_psk_server_get_username() should have returned NULL\n");
if (gnutls_psk_server_get_username2(server, &psk_username) < 0)
fail("server: Could not get PSK username\n");
if (psk_username.size != sizeof(expected_imported_identity) ||
memcmp(psk_username.data, expected_imported_identity,
sizeof(expected_imported_identity)))
fail("server: Unexpected PSK username\n");
success("server: PSK username length: %d\n", psk_username.size);
}
TRANSFER(client, server, MSG, strlen(MSG), buffer, MAX_BUF);
TRANSFER(server, client, MSG, strlen(MSG), buffer, MAX_BUF);
gnutls_bye(server, GNUTLS_SHUT_WR);
gnutls_bye(client, GNUTLS_SHUT_WR);
gnutls_deinit(server);
gnutls_deinit(client);
gnutls_psk_free_server_credentials(server_pskcred);
gnutls_psk_free_client_credentials(client_pskcred);
reset_buffers();
}
void doit(void)
{
global_init();
run_test("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK");
run_test(
"NORMAL:-VERS-ALL:+VERS-TLS1.3:-GROUP-ALL:+GROUP-FFDHE2048:+DHE-PSK");
run_test(
"NORMAL:-VERS-ALL:+VERS-TLS1.3:-GROUP-ALL:+GROUP-SECP256R1:+ECDHE-PSK");
gnutls_global_deinit();
}
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