/*

 * Copyright (C) 2015 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 <gnutls/abstract.h>

#include <gnutls/x509.h>

#include "utils.h"

#include "eagain-common.h"

#include "cert-common.h"

/* This tests gnutls_certificate_set_x509_key() */

const char *side;

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_retr2_st *st)

{

	int ret;

	gnutls_x509_crt_t *crts;

	unsigned int crts_size;

	gnutls_x509_privkey_t pkey;

	if (gnutls_certificate_client_get_request_status(session) == 0) {

		fail("gnutls_certificate_client_get_request_status failed\n");

		return -1;

	}

	st->cert_type = GNUTLS_CRT_X509;

	ret = gnutls_x509_crt_list_import2(&crts, &crts_size, &cli_ca3_cert_chain, GNUTLS_X509_FMT_PEM,

		GNUTLS_X509_CRT_LIST_FAIL_IF_UNSORTED);

	if (ret < 0) {

		fail("error: %s\n", gnutls_strerror(ret));

		exit(1);

	}

	ret = gnutls_x509_privkey_init(&pkey);

	if (ret < 0) {

		fail("error: %s\n", gnutls_strerror(ret));

		exit(1);

	}

	ret = gnutls_x509_privkey_import(pkey, &cli_ca3_key, GNUTLS_X509_FMT_PEM);

	if (ret < 0) {

		fail("error: %s\n", gnutls_strerror(ret));

		exit(1);

	}

	st->cert.x509 = crts;

	st->ncerts = crts_size;

	st->key.x509 = pkey;

	st->deinit_all = 1;

	return 0;

}

static int

server_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_retr2_st *st)

{

	int ret;

	gnutls_x509_crt_t *crts;

	unsigned int crts_size;

	gnutls_x509_privkey_t pkey;

	st->cert_type = GNUTLS_CRT_X509;

	ret = gnutls_x509_crt_list_import2(&crts, &crts_size, &server_ca3_cert_chain, GNUTLS_X509_FMT_PEM,

		GNUTLS_X509_CRT_LIST_FAIL_IF_UNSORTED);

	if (ret < 0) {

		fail("error: %s\n", gnutls_strerror(ret));

		exit(1);

	}

	ret = gnutls_x509_privkey_init(&pkey);

	if (ret < 0) {

		fail("error: %s\n", gnutls_strerror(ret));

		exit(1);

	}

	ret = gnutls_x509_privkey_import(pkey, &server_ca3_key, GNUTLS_X509_FMT_PEM);

	if (ret < 0) {

		fail("error: %s\n", gnutls_strerror(ret));

		exit(1);

	}

	st->cert.x509 = crts;

	st->ncerts = crts_size;

	st->key.x509 = pkey;

	st->deinit_all = 1;

	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);

	gnutls_certificate_set_retrieve_function(serverx509cred,

						 server_cert_callback);

	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_function(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);

	if (gnutls_certificate_get_ours(client) == NULL) {

		fail("client certificate was not sent!\n");

		exit(1);

	}

	/* check gnutls_certificate_get_ours() - server side */

	{

		const gnutls_datum_t *mcert;

		gnutls_datum_t scert;

		gnutls_x509_crt_t crt;

		mcert = gnutls_certificate_get_ours(server);

		if (mcert == NULL) {

			fail("gnutls_certificate_get_ours(): failed\n");

			exit(1);

		}

		gnutls_x509_crt_init(&crt;;

		ret =

		    gnutls_x509_crt_import(crt, &server_ca3_localhost_cert_chain,

					   GNUTLS_X509_FMT_PEM);

		if (ret < 0) {

			fail("gnutls_x509_crt_import: %s\n",

			     gnutls_strerror(ret));

			exit(1);

		}

		ret = gnutls_x509_crt_export2(crt, GNUTLS_X509_FMT_DER, &scert);

		if (ret < 0) {

			fail("gnutls_x509_crt_export2: %s\n",

			     gnutls_strerror(ret));

			exit(1);

		}

		gnutls_x509_crt_deinit(crt);

		if (scert.size != mcert->size

		    || memcmp(scert.data, mcert->data, mcert->size) != 0) {

			fail("gnutls_certificate_get_ours output doesn't match cert\n");

			exit(1);

		}

		gnutls_free(scert.data);

	}

	/* check gnutls_certificate_get_ours() - client side */

	{

		const gnutls_datum_t *mcert;

		gnutls_datum_t ccert;

		gnutls_x509_crt_t crt;

		mcert = gnutls_certificate_get_ours(client);

		if (mcert == NULL) {

			fail("gnutls_certificate_get_ours(): failed\n");

			exit(1);

		}

		gnutls_x509_crt_init(&crt;;

		ret =

		    gnutls_x509_crt_import(crt, &cli_ca3_cert_chain,

					   GNUTLS_X509_FMT_PEM);

		if (ret < 0) {

			fail("gnutls_x509_crt_import: %s\n",

			     gnutls_strerror(ret));

			exit(1);

		}

		ret = gnutls_x509_crt_export2(crt, GNUTLS_X509_FMT_DER, &ccert);

		if (ret < 0) {

			fail("gnutls_x509_crt_export2: %s\n",

			     gnutls_strerror(ret));

			exit(1);

		}

		gnutls_x509_crt_deinit(crt);

		if (ccert.size != mcert->size

		    || memcmp(ccert.data, mcert->data, mcert->size) != 0) {

			fail("gnutls_certificate_get_ours output doesn't match cert\n");

			exit(1);

		}

		gnutls_free(ccert.data);

	}

	/* check the number of certificates received */

	{

		unsigned cert_list_size = 0;

		gnutls_typed_vdata_st data[2];

		unsigned status;

		memset(data, 0, sizeof(data));

		/* check with wrong hostname */

		data[0].type = GNUTLS_DT_DNS_HOSTNAME;

		data[0].data = (void *)"localhost1";

		data[1].type = GNUTLS_DT_KEY_PURPOSE_OID;

		data[1].data = (void *)GNUTLS_KP_TLS_WWW_SERVER;

		gnutls_certificate_get_peers(client, &cert_list_size);

		if (cert_list_size != 2) {

			fprintf(stderr, "received a certificate list of %d!\n",

				cert_list_size);

			exit(1);

		}

		ret = gnutls_certificate_verify_peers(client, data, 2, &status);

		if (ret < 0) {

			fprintf(stderr, "could not verify certificate: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		if (status == 0) {

			fprintf(stderr, "should not have accepted!\n");

			exit(1);

		}

		/* check with wrong purpose */

		data[0].type = GNUTLS_DT_DNS_HOSTNAME;

		data[0].data = (void *)"localhost";

		data[1].type = GNUTLS_DT_KEY_PURPOSE_OID;

		data[1].data = (void *)GNUTLS_KP_TLS_WWW_CLIENT;

		gnutls_certificate_get_peers(client, &cert_list_size);

		if (cert_list_size != 2) {

			fprintf(stderr, "received a certificate list of %d!\n",

				cert_list_size);

			exit(1);

		}

		ret = gnutls_certificate_verify_peers(client, data, 2, &status);

		if (ret < 0) {

			fprintf(stderr, "could not verify certificate: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		if (status == 0) {

			fprintf(stderr, "should not have accepted!\n");

			exit(1);

		}

		/* check with correct purpose */

		data[0].type = GNUTLS_DT_DNS_HOSTNAME;

		data[0].data = (void *)"localhost";

		data[1].type = GNUTLS_DT_KEY_PURPOSE_OID;

		data[1].data = (void *)GNUTLS_KP_TLS_WWW_SERVER;

		ret = gnutls_certificate_verify_peers(client, data, 2, &status);

		if (ret < 0) {

			fprintf(stderr, "could not verify certificate: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		if (status != 0) {

			fprintf(stderr, "could not verify certificate: %.4x\n",

				status);

			exit(1);

		}

	}

	if (gnutls_certificate_client_get_request_status(client) == 0) {

		fail("gnutls_certificate_client_get_request_status - 2 failed\n");

		exit(1);

	}

	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();

}

void doit(void)

{

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

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

	start("NORMAL:-VERS-TLS-ALL:+VERS-TLS1.1");

	start("NORMAL");

}