/*

 * 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 <assert.h>

#include <gnutls/gnutls.h>

#include "utils.h"

#include "eagain-common.h"

/* This test checks whether the client switching certificates is detected

 * by the server */

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"

#define SENT 0

#define NOT_SENT 1

enum {

	INCORRECT_CA_FORCE = 0,

	INCORRECT_CA = 1,

	CORRECT_CA = 2,

	NO_CA = 3

};

static void try(const char *prio, unsigned expect, unsigned ca_type)

{

	int ret;

	/* Server stuff. */

	gnutls_certificate_credentials_t serverx509cred;

	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_certificate_credentials_t clientx509cred;

	unsigned flags = 0;

	gnutls_session_t client;

	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_certificate_allocate_credentials(&serverx509cred);

	gnutls_certificate_set_x509_key_mem(serverx509cred,

					    &server_ca3_cert_chain, &server_ca3_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_dh_params_init(&dh_params);

	gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_dh_params(serverx509cred, dh_params);

	gnutls_init(&server, GNUTLS_SERVER);

	gnutls_certificate_server_set_request(server, GNUTLS_CERT_REQUEST);

	if (ca_type == CORRECT_CA) {

		ret = gnutls_certificate_set_x509_trust_mem(serverx509cred, &ca3_cert, GNUTLS_X509_FMT_PEM);

	} else if (ca_type == INCORRECT_CA || ca_type == INCORRECT_CA_FORCE) {

		ret = gnutls_certificate_set_x509_trust_mem(serverx509cred, &unknown_ca_cert, GNUTLS_X509_FMT_PEM);

	} else if (ca_type == NO_CA) {

		ret = 0;

	} else {

		abort();

	}

		ret = 0;

	if (ret < 0)

		exit(1);

	gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE,

				serverx509cred);

	assert(gnutls_priority_set_direct(server, prio, NULL) >= 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);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_set_x509_key_mem(clientx509cred,

						  &cli_ca3_cert_chain, &cli_ca3_key,

						  GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca3_cert, GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	if (ca_type == INCORRECT_CA_FORCE) {

		flags |= GNUTLS_FORCE_CLIENT_CERT;

	}

	ret = gnutls_init(&client, GNUTLS_CLIENT|flags);

	if (ret < 0)

		exit(1);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,

				clientx509cred);

	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);

	success("Testing CA type %d, expecting %s\n", ca_type, expect==SENT?"sent":"not sent");

	HANDSHAKE(client, server);

	if (expect == SENT) {

		if (gnutls_certificate_get_ours(client) == NULL) {

			fail("Test %d: client didn't send any certificate\n", ca_type);

			exit(1);

		}

	} else {

		if (gnutls_certificate_get_ours(client) != NULL) {

			fail("Test %d: client sent a certificate, although not expected\n", ca_type);

			exit(1);

		}

	}

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_certificate_free_credentials(serverx509cred);

	gnutls_certificate_free_credentials(clientx509cred);

	gnutls_dh_params_deinit(dh_params);

}

static void start(const char *prio)

{

	global_init();

	success("trying %s\n", prio);

	try(prio, SENT, NO_CA);

	try(prio, SENT, CORRECT_CA);

	try(prio, NOT_SENT, INCORRECT_CA);

	try(prio, SENT, INCORRECT_CA_FORCE);

	gnutls_global_deinit();

}

void doit(void)

{

	start("NORMAL:-VERS-ALL:+VERS-TLS1.2");

	start("NORMAL:-VERS-ALL:+VERS-TLS1.3");

	start("NORMAL");

}