/*
 * 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, see <https://www.gnu.org/licenses/>.
 */

/* Parts copied from GnuTLS example programs. */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#if !defined(_WIN32)
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#endif
#include <unistd.h>
#include <assert.h>
#include <time.h>
#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>
#include <gnutls/x509.h>

#include "cert-common.h"
#include "utils.h"

/* Test for gnutls_certificate_set_key()
 *
 */

static void tls_log_func(int level, const char *str)
{
	fprintf(stderr, "<%d>| %s", level, str);
}

static time_t mytime(time_t *t)
{
	time_t then = 1473673819;
	if (t)
		*t = then;

	return then;
}

static unsigned import_key(gnutls_certificate_credentials_t xcred,
			   const gnutls_datum_t *skey,
			   const gnutls_datum_t *cert)
{
	gnutls_pcert_st pcert_list[16];
	gnutls_privkey_t key;
	unsigned pcert_list_size, idx, i;
	gnutls_datum_t tcert;
	const char *names[] = { "localhost", "localhost2" };
	int ret;

	assert(gnutls_privkey_init(&key) >= 0);

	pcert_list_size = sizeof(pcert_list) / sizeof(pcert_list[0]);
	ret = gnutls_pcert_list_import_x509_raw(pcert_list, &pcert_list_size,
						cert, GNUTLS_X509_FMT_PEM, 0);
	if (ret < 0) {
		fail("error in gnutls_pcert_list_import_x509_raw: %s\n",
		     gnutls_strerror(ret));
	}

	ret = gnutls_privkey_import_x509_raw(key, skey, GNUTLS_X509_FMT_PEM,
					     NULL, 0);
	if (ret < 0) {
		fail("error in key import: %s\n", gnutls_strerror(ret));
	}

	ret = gnutls_certificate_set_key(xcred, names, 2, pcert_list,
					 pcert_list_size, key);
	if (ret < 0) {
		fail("error in gnutls_certificate_set_key: %s\n",
		     gnutls_strerror(ret));
		exit(1);
	}

	/* return index */
	idx = ret;

	/* verify whether the stored certificate match the ones we have */
	for (i = 0; i < pcert_list_size; i++) {
		ret = gnutls_certificate_get_crt_raw(xcred, idx, i, &tcert);
		if (ret < 0) {
			fail("error in %d: cert: %d: %s\n", __LINE__, i,
			     gnutls_strerror(ret));
			exit(1);
		}

		if (tcert.size != pcert_list[i].cert.size ||
		    memcmp(tcert.data, pcert_list[i].cert.data, tcert.size) !=
			    0) {
			fail("error in %d: cert %d: %s\n", __LINE__, i,
			     "ca cert don't match");
			exit(1);
		}
	}

	return idx;
}

static void basic(void)
{
	gnutls_certificate_credentials_t x509_cred;
	gnutls_certificate_credentials_t clicred;
	int ret;
	unsigned idx, i;

	/* this must be called once in the program
	 */
	global_init();

	gnutls_global_set_time_function(mytime);

	gnutls_global_set_log_function(tls_log_func);
	if (debug)
		gnutls_global_set_log_level(6);

	assert(gnutls_certificate_allocate_credentials(&clicred) >= 0);
	assert(gnutls_certificate_allocate_credentials(&x509_cred) >= 0);

	gnutls_certificate_set_flags(x509_cred, GNUTLS_CERTIFICATE_API_V2);

	ret = gnutls_certificate_set_x509_trust_mem(clicred, &ca_cert,
						    GNUTLS_X509_FMT_PEM);
	if (ret < 0)
		fail("set_x509_trust_file failed: %s\n", gnutls_strerror(ret));

	idx = import_key(x509_cred, &server_key, &server_cert);
	assert(idx == 0);

	test_cli_serv(x509_cred, clicred, "NORMAL", "localhost", NULL, NULL,
		      NULL);

	/* verify that we can add certs, and that their index will change */
	for (i = 0; i < 16; i++) {
		idx = import_key(x509_cred, &server_ecc_key, &server_ecc_cert);
		assert(idx == 1 + i);
	}

	gnutls_certificate_free_credentials(x509_cred);
	gnutls_certificate_free_credentials(clicred);

	gnutls_global_deinit();

	if (debug)
		success("success");
}

static void failure_mode(void)
{
	gnutls_certificate_credentials_t x509_cred;
	gnutls_pcert_st pcert_list[16];
	gnutls_privkey_t key;
	unsigned pcert_list_size;
	const char *names[] = { "localhost", "localhost2" };
	int ret;
	unsigned i;

	/* this must be called once in the program
	 */
	global_init();

	gnutls_global_set_log_function(tls_log_func);
	if (debug)
		gnutls_global_set_log_level(6);

	assert(gnutls_certificate_allocate_credentials(&x509_cred) >= 0);
	assert(gnutls_privkey_init(&key) >= 0);

	pcert_list_size = sizeof(pcert_list) / sizeof(pcert_list[0]);
	ret = gnutls_pcert_list_import_x509_raw(pcert_list, &pcert_list_size,
						&server_cert,
						GNUTLS_X509_FMT_PEM, 0);
	if (ret < 0) {
		fail("error in gnutls_pcert_list_import_x509_raw: %s\n",
		     gnutls_strerror(ret));
	}

	ret = gnutls_privkey_import_x509_raw(key, &server_ecc_key,
					     GNUTLS_X509_FMT_PEM, NULL, 0);
	if (ret < 0) {
		fail("error in key import: %s\n", gnutls_strerror(ret));
	}

	ret = gnutls_certificate_set_key(x509_cred, names, 2, pcert_list,
					 pcert_list_size, key);
	if (ret < 0) {
		success("expected error in gnutls_certificate_set_key: %s\n",
			gnutls_strerror(ret));
		goto cleanup;
	}

	fail("gnutls_certificate_set_key succeeded unexpectedly\n");

cleanup:
	for (i = 0; i < pcert_list_size; i++) {
		gnutls_pcert_deinit(&pcert_list[i]);
	}
	gnutls_privkey_deinit(key);
	gnutls_certificate_free_credentials(x509_cred);

	gnutls_global_deinit();

	if (debug)
		success("success");
}

static void auto_parse(void)
{
	gnutls_certificate_credentials_t x509_cred, clicred;
	gnutls_pcert_st pcert_list[16];
	gnutls_privkey_t key;
	gnutls_pcert_st second_pcert[2];
	gnutls_privkey_t second_key;
	unsigned pcert_list_size;
	int ret;

	/* this must be called once in the program
	 */
	global_init();

	gnutls_global_set_time_function(mytime);

	gnutls_global_set_log_function(tls_log_func);
	if (debug)
		gnutls_global_set_log_level(6);

	assert(gnutls_certificate_allocate_credentials(&x509_cred) >= 0);
	assert(gnutls_privkey_init(&key) >= 0);

	assert(gnutls_certificate_allocate_credentials(&clicred) >= 0);

	ret = gnutls_certificate_set_x509_trust_mem(clicred, &ca3_cert,
						    GNUTLS_X509_FMT_PEM);
	if (ret < 0)
		fail("set_x509_trust_file failed: %s\n", gnutls_strerror(ret));

	pcert_list_size = sizeof(pcert_list) / sizeof(pcert_list[0]);
	ret = gnutls_pcert_list_import_x509_raw(
		pcert_list, &pcert_list_size, &server_ca3_localhost_cert_chain,
		GNUTLS_X509_FMT_PEM, 0);
	if (ret < 0) {
		fail("error in gnutls_pcert_list_import_x509_raw: %s\n",
		     gnutls_strerror(ret));
	}

	ret = gnutls_privkey_import_x509_raw(key, &server_ca3_key,
					     GNUTLS_X509_FMT_PEM, NULL, 0);
	if (ret < 0) {
		fail("error in key import: %s\n", gnutls_strerror(ret));
	}

	ret = gnutls_certificate_set_key(x509_cred, NULL, 0, pcert_list,
					 pcert_list_size, key);
	if (ret < 0) {
		fail("error in gnutls_certificate_set_key: %s\n",
		     gnutls_strerror(ret));
		exit(1);
	}

	/* set the ECC key */
	assert(gnutls_privkey_init(&second_key) >= 0);

	pcert_list_size = 2;
	ret = gnutls_pcert_list_import_x509_raw(
		second_pcert, &pcert_list_size,
		&server_ca3_localhost6_cert_chain, GNUTLS_X509_FMT_PEM, 0);
	if (ret < 0) {
		fail("error in gnutls_pcert_list_import_x509_raw: %s\n",
		     gnutls_strerror(ret));
	}

	ret = gnutls_privkey_import_x509_raw(second_key, &server_ca3_key,
					     GNUTLS_X509_FMT_PEM, NULL, 0);
	if (ret < 0) {
		fail("error in key import: %s\n", gnutls_strerror(ret));
	}

	ret = gnutls_certificate_set_key(x509_cred, NULL, 0, second_pcert, 2,
					 second_key);
	if (ret < 0) {
		fail("error in gnutls_certificate_set_key: %s\n",
		     gnutls_strerror(ret));
		exit(1);
	}

	test_cli_serv(x509_cred, clicred, "NORMAL", "localhost", NULL, NULL,
		      NULL); /* the DNS name of the first cert */
	test_cli_serv(x509_cred, clicred, "NORMAL", "localhost6", NULL, NULL,
		      NULL); /* the DNS name of ECC cert */
	test_cli_serv(x509_cred, clicred, "NORMAL", "www.none.org", NULL, NULL,
		      NULL); /* the DNS name of ECC cert */

	gnutls_certificate_free_credentials(x509_cred);
	gnutls_certificate_free_credentials(clicred);

	gnutls_global_deinit();

	if (debug)
		success("success");
}

void doit(void)
{
	basic();
	failure_mode();
	auto_parse();
}