/*

 * 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>

#include <gnutls/abstract.h>

#define RANDOMIZE

#include "cert-common.h"

#include "cmocka-common.h"

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

 * rekey/rehandshake.

 */

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 unsigned int cert_asked = 0;

static int cert_callback(gnutls_session_t session,

			 const gnutls_datum_t * req_ca_rdn, int nreqs,

			 const gnutls_pk_algorithm_t * sign_algos,

			 int sign_algos_length, gnutls_pcert_st ** pcert,

			 unsigned int *pcert_length, gnutls_privkey_t * pkey)

{

	cert_asked = 1;

	*pcert_length = 0;

	*pcert = NULL;

	*pkey = NULL;

	return 0;

}

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();

	cert_asked = 0;

	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|GNUTLS_POST_HANDSHAKE_AUTH);

	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);

	gnutls_certificate_set_retrieve_function2(clientx509cred, cert_callback);

	ret = gnutls_init(&client, GNUTLS_CLIENT|GNUTLS_AUTO_REAUTH|GNUTLS_POST_HANDSHAKE_AUTH);

	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) {

		char b[1];

		unsigned hstarted = 0;

		do {

			sret = gnutls_rehandshake(server);

		} while (sret == GNUTLS_E_AGAIN || sret == GNUTLS_E_INTERRUPTED);

		assert_true(sret == 0);

		assert_true(gnutls_record_get_direction(server)==1);

		sret = cret = GNUTLS_E_AGAIN;

		do {

			if (!hstarted) {

				sret = gnutls_record_recv(server, b, 1);

				if (sret == GNUTLS_E_INTERRUPTED) sret = GNUTLS_E_AGAIN;

				if (sret == GNUTLS_E_REHANDSHAKE) {

					hstarted = 1;

					sret = GNUTLS_E_AGAIN;

				}

				assert_true(sret == GNUTLS_E_AGAIN);

			}

			if (sret == GNUTLS_E_AGAIN && hstarted) {

				sret = gnutls_handshake (server);

				if (sret == GNUTLS_E_INTERRUPTED) sret = GNUTLS_E_AGAIN;

				assert_true(sret == GNUTLS_E_AGAIN || sret == 0);

			}

			/* we are done in client side */

			if (hstarted && gnutls_record_get_direction(client) == 0 && to_client_len == 0)

				cret = 0;

			if (cret == GNUTLS_E_AGAIN) {

				cret = gnutls_record_recv(client, b, 1);

				if (cret == GNUTLS_E_INTERRUPTED) cret = GNUTLS_E_AGAIN;

			}

			assert_true(cret == GNUTLS_E_AGAIN || cret >= 0);

		} while (cret == GNUTLS_E_AGAIN || sret == GNUTLS_E_AGAIN);

		assert_true(hstarted != 0);

	} else {

		char b[1];

		gnutls_certificate_server_set_request(server, GNUTLS_CERT_REQUEST);

		do {

			sret = gnutls_reauth(server, 0);

		} while (sret == GNUTLS_E_INTERRUPTED);

		assert_true(sret == GNUTLS_E_AGAIN || sret >= 0);

		cret = GNUTLS_E_AGAIN;

		do {

			if (cret == GNUTLS_E_AGAIN) {

				cret = gnutls_record_recv(client, b, 1);

				if (cret == GNUTLS_E_INTERRUPTED) cret = GNUTLS_E_AGAIN;

			}

			if (sret == GNUTLS_E_AGAIN) {

				sret = gnutls_reauth(server, 0);

				if (sret == GNUTLS_E_INTERRUPTED) sret = GNUTLS_E_AGAIN;

			}

			/* we are done in client side */

			if (gnutls_record_get_direction(client) == 0 && to_client_len == 0)

				cret = 0;

		} while (cret == GNUTLS_E_AGAIN || sret == GNUTLS_E_AGAIN);

	}

	assert_return_code(cret, 0);

	assert_return_code(sret, 0);

	assert_return_code(cert_asked, 1);

	msglen = strlen(MSG);

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

	assert_true(gnutls_bye(client, GNUTLS_SHUT_WR)>=0);

	assert_true(gnutls_bye(server, GNUTLS_SHUT_WR)>=0);

	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", 1);

}

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(tls13_async_handshake),

	};

	return cmocka_run_group_tests(tests, NULL, NULL);

}