/*

 * Copyright (C) 2008-2012 Free Software Foundation, Inc.

 * Copyright (C) 2018 Red Hat, Inc.

 *

 * Author: Simon Josefsson, 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 <gnutls/gnutls.h>

#include <gnutls/crypto.h>

#define RANDOMIZE

#include "cert-common.h"

#include "cmocka-common.h"

/* This tests operation under non-blocking mode in TLS1.2/TLS1.3

 * as well as operation under TLS1.2 re-handshake.

 */

static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "<%d>| %s", level, str);

}

#define MAX_BUF 1024

#define MSG "Hello TLS, and hi and how are you and more data here... and more... and even more and even more more data..."

static void async_handshake(void **glob_state, const char *prio, unsigned rehsk)

{

	/* Server stuff. */

	gnutls_certificate_credentials_t serverx509cred;

	gnutls_session_t server;

	int sret, cret;

	/* Client stuff. */

	gnutls_certificate_credentials_t clientx509cred;

	gnutls_session_t client;

	/* Need to enable anonymous KX specifically. */

	char buffer[MAX_BUF + 1];

	int ret, transferred = 0, msglen;

	/* General init. */

	reset_buffers();

	gnutls_global_init();

	gnutls_global_set_log_function(tls_log_func);

	/* Init server */

	assert_return_code(gnutls_certificate_allocate_credentials(&serverx509cred), 0);

	assert_return_code(gnutls_certificate_set_x509_key_mem(serverx509cred,

					    &server_cert, &server_key,

					    GNUTLS_X509_FMT_PEM), 0);

	ret = gnutls_init(&server, GNUTLS_SERVER);

	assert_return_code(ret, 0);

	ret =

	    gnutls_priority_set_direct(server,

					prio,

					NULL);

	assert_return_code(ret, 0);

	ret = gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE, serverx509cred);

	assert_return_code(ret, 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 */

	ret = gnutls_certificate_allocate_credentials(&clientx509cred);

	assert_return_code(ret, 0);

	ret = gnutls_init(&client, GNUTLS_CLIENT);

	ret =

	    gnutls_priority_set_direct(client,

					prio,

					NULL);

	assert_return_code(ret, 0);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE, clientx509cred);

	assert_return_code(ret, 0);

	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 (rehsk == 1 || rehsk == 3) {

		ssize_t n;

		char b[1];

		do {

			sret = gnutls_rehandshake(server);

		} while (sret == GNUTLS_E_AGAIN);

		do {

			n = gnutls_record_recv(client, b, 1);

		} while(n == GNUTLS_E_AGAIN);

		assert_int_equal(n, GNUTLS_E_REHANDSHAKE);

		if (rehsk == 3) {

			/* client sends app data and the server ignores them */

			do {

				cret = gnutls_record_send(client, "x", 1);

			} while (cret == GNUTLS_E_AGAIN);

			do {

				sret = gnutls_handshake(server);

			} while (sret == GNUTLS_E_AGAIN);

			assert_int_equal(sret, GNUTLS_E_GOT_APPLICATION_DATA);

			do {

				n = gnutls_record_recv(server, buffer, sizeof(buffer));

			} while(n == GNUTLS_E_AGAIN);

		}

		HANDSHAKE(client, server);

	} else if (rehsk == 2) {

		HANDSHAKE(client, server);

	}

	msglen = strlen(MSG);

	TRANSFER(client, server, MSG, msglen, buffer, MAX_BUF);

	gnutls_bye(client, GNUTLS_SHUT_WR);

	gnutls_bye(server, GNUTLS_SHUT_WR);

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_certificate_free_credentials(serverx509cred);

	gnutls_certificate_free_credentials(clientx509cred);

	gnutls_global_deinit();

}

static void tls12_async_handshake(void **glob_state)

{

	async_handshake(glob_state, "NORMAL:-VERS-ALL:+VERS-TLS1.2", 0);

}

static void tls12_async_rehandshake_client(void **glob_state)

{

	async_handshake(glob_state, "NORMAL:-VERS-ALL:+VERS-TLS1.2", 1);

}

static void tls12_async_rehandshake_server(void **glob_state)

{

	async_handshake(glob_state, "NORMAL:-VERS-ALL:+VERS-TLS1.2", 2);

}

static void tls12_async_rehandshake_server_appdata(void **glob_state)

{

	async_handshake(glob_state, "NORMAL:-VERS-ALL:+VERS-TLS1.2", 3);

}

static void tls13_async_handshake(void **glob_state)

{

	async_handshake(glob_state, "NORMAL:-VERS-ALL:+VERS-TLS1.3", 0);

}

int main(void)

{

	const struct CMUnitTest tests[] = {

		cmocka_unit_test(tls12_async_handshake),

		cmocka_unit_test(tls12_async_rehandshake_client),

		cmocka_unit_test(tls12_async_rehandshake_server),

		cmocka_unit_test(tls12_async_rehandshake_server_appdata),

		cmocka_unit_test(tls13_async_handshake),

	};

	return cmocka_run_group_tests(tests, NULL, NULL);

}