/*

 * Copyright (C) 2017 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 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 <assert.h>

#include <gnutls/gnutls.h>

#include <gnutls/abstract.h>

#include <gnutls/x509.h>

#include "utils.h"

#include "eagain-common.h"

#include "cert-common.h"

/* This tests whether the certificate callback receives the

 * corresponding to server certificates relative distinguished names.

 */

const char *side;

#define TOTAL_CAS 2

#define CA1_PTR &ca3_cert

#define CA2_PTR &ca_cert

gnutls_datum_t ca_dn[TOTAL_CAS];

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

{

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

}

static int

cert_callback(gnutls_session_t session,

	      const gnutls_datum_t * req_ca_rdn, int nreqs,

	      const gnutls_pk_algorithm_t * pk_algos,

	      int pk_algos_length, gnutls_pcert_st ** pcert,

	      unsigned int *pcert_length, gnutls_privkey_t * pkey)

{

	unsigned i;

	if (nreqs != TOTAL_CAS) {

		fail("cert_callback: found only %d RDNs\n", nreqs);

	}

	for (i = 0;i < TOTAL_CAS;i++) {

		if (req_ca_rdn[i].size != ca_dn[i].size) {

			fail("CA[%d] size mismatch\n", i);

		}

		if (memcmp(req_ca_rdn[i].data, ca_dn[i].data, ca_dn[i].size) != 0) {

			fail("CA[%d] data mismatch\n", i);

		}

	}

	success(" - Both (%d) CAs match\n\n", TOTAL_CAS);

	*pcert_length = 0;

	*pkey = NULL;

	*pcert = NULL;

	return 0;

}

static void start(const char *prio)

{

	int ret;

	/* Server stuff. */

	gnutls_certificate_credentials_t serverx509cred;

	gnutls_session_t server;

	int sret = GNUTLS_E_AGAIN;

	/* Client stuff. */

	gnutls_certificate_credentials_t clientx509cred;

	gnutls_session_t client;

	int cret = GNUTLS_E_AGAIN;

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

	/* General init. */

	global_init();

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(2);

	/* Init server */

	gnutls_certificate_allocate_credentials(&serverx509cred);

	assert(gnutls_certificate_set_x509_key_mem(serverx509cred, &server_cert, &server_key, GNUTLS_X509_FMT_PEM) >= 0);

	assert(gnutls_certificate_set_x509_trust_mem(serverx509cred, CA1_PTR, GNUTLS_X509_FMT_PEM) >= 0);

	assert(gnutls_certificate_set_x509_trust_mem(serverx509cred, CA2_PTR, GNUTLS_X509_FMT_PEM) >= 0);

	gnutls_init(&server, GNUTLS_SERVER);

	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);

	gnutls_certificate_server_set_request(server, GNUTLS_CERT_REQUEST);

	/* Init client */

	/* Init client */

	ret = gnutls_certificate_allocate_credentials(&clientx509cred);

	if (ret < 0)

		exit(1);

	ret =

	    gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca3_cert,

						  GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	gnutls_certificate_set_retrieve_function2(clientx509cred,

						  cert_callback);

	ret = gnutls_init(&client, GNUTLS_CLIENT);

	if (ret < 0)

		exit(1);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,

				     clientx509cred);

	if (ret < 0)

		exit(1);

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

	gnutls_bye(client, GNUTLS_SHUT_RDWR);

	gnutls_bye(server, GNUTLS_SHUT_RDWR);

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_certificate_free_credentials(serverx509cred);

	gnutls_certificate_free_credentials(clientx509cred);

	gnutls_global_deinit();

	reset_buffers();

}

static void find_dn(const gnutls_datum_t *cert, gnutls_datum_t *dn)

{

	gnutls_x509_crt_t crt;

	assert(gnutls_x509_crt_init(&crt)>=0);

	assert(gnutls_x509_crt_import(crt, cert, GNUTLS_X509_FMT_PEM) >= 0);

	assert(gnutls_x509_crt_get_raw_dn(crt, dn) >= 0);

	gnutls_x509_crt_deinit(crt);

}

void doit(void)

{

	find_dn(CA1_PTR, &ca_dn[0]);

	find_dn(CA2_PTR, &ca_dn[1]);

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

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

	gnutls_free(ca_dn[0].data);

	gnutls_free(ca_dn[1].data);

}