/*

 * 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 <gnutls/gnutls.h>

#include "utils.h"

#include "eagain-common.h"

#include "cert-common.h"

const char *side;

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

{

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

}

#define TESTDATA "xxxtesttest1234"

/* counts the number of calls of send_testdata() within a handshake */

enum {

	TEST_SEND_RECV,

	TEST_RECV_SEND,

	TEST_HANDSHAKE_CALL,

	TEST_BYE,

	TESTNO_MAX

};

#define myfail(fmt, ...) \

	fail("%s%s %d: "fmt, dtls?"dtls":"tls", name, testno, ##__VA_ARGS__)

static void try(const char *name, unsigned testno, unsigned fs,

		const char *prio, unsigned dhsize,

		unsigned dtls)

{

	int ret;

	/* Server stuff. */

	gnutls_certificate_credentials_t serverx509cred;

	gnutls_anon_client_credentials_t clientanoncred;

	gnutls_anon_server_credentials_t serveranoncred;

	gnutls_session_t server;

	int sret = GNUTLS_E_AGAIN;

	char buffer[512];

	/* Client stuff. */

	gnutls_certificate_credentials_t clientx509cred;

	gnutls_session_t client;

	int cret = GNUTLS_E_AGAIN;

	const gnutls_datum_t p3_2048 =

	    { (void *)pkcs3_2048, strlen(pkcs3_2048) };

	const gnutls_datum_t p3_3072 =

	    { (void *)pkcs3_3072, strlen(pkcs3_3072) };

	gnutls_dh_params_t dh_params;

	unsigned flags = 0;

	if (testno == TEST_HANDSHAKE_CALL && fs == 0)

		return;

	if (dtls)

		flags |= GNUTLS_DATAGRAM|GNUTLS_NONBLOCK;

	/* General init. */

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(999);

	gnutls_dh_params_init(&dh_params);

	if (dhsize < 3072) {

		ret = gnutls_dh_params_import_pkcs3(dh_params, &p3_2048,

						    GNUTLS_X509_FMT_PEM);

	} else {

		ret = gnutls_dh_params_import_pkcs3(dh_params, &p3_3072,

						    GNUTLS_X509_FMT_PEM);

	}

	/* Init server */

	gnutls_anon_allocate_server_credentials(&serveranoncred);

	gnutls_anon_set_server_dh_params(serveranoncred, dh_params);

	gnutls_certificate_allocate_credentials(&serverx509cred);

	gnutls_certificate_set_x509_key_mem(serverx509cred,

					    &server_cert, &server_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_x509_key_mem(serverx509cred,

					    &server_ecc_cert, &server_ecc_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_dh_params(serverx509cred, dh_params);

	gnutls_init(&server, GNUTLS_SERVER|flags);

	gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE, serverx509cred);

	gnutls_credentials_set(server, GNUTLS_CRD_ANON, serveranoncred);

	gnutls_priority_set_direct(server, prio, NULL);

	gnutls_transport_set_push_function(server, server_push);

	gnutls_transport_set_pull_function(server, server_pull);

	gnutls_transport_set_pull_timeout_function(server, server_pull_timeout_func);

	gnutls_transport_set_ptr(server, server);

	/* Init client */

	gnutls_anon_allocate_client_credentials(&clientanoncred);

	ret = gnutls_certificate_allocate_credentials(&clientx509cred);

	if (ret < 0)

		exit(1);

	ret =

	    gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca_cert,

						  GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

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

	if (ret < 0)

		exit(1);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,

				     clientx509cred);

	if (ret < 0)

		exit(1);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_ANON, clientanoncred);

	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_pull_timeout_function(client, client_pull_timeout_func);

	gnutls_transport_set_ptr(client, client);

	HANDSHAKE(client, server);

	if ((gnutls_session_get_flags(client) & GNUTLS_SFLAGS_FALSE_START)

	    && !fs) {

		myfail("false start occurred but not expected\n");

	}

	if (!(gnutls_session_get_flags(client) & GNUTLS_SFLAGS_FALSE_START)

	    && fs) {

		myfail("false start expected but not happened\n");

	}

	if (testno == TEST_SEND_RECV) {

		side = "client";

		ret =

		    gnutls_record_send(client, TESTDATA, sizeof(TESTDATA) - 1);

		if (ret < 0) {

			myfail("error sending false start data: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		side = "server";

		/* verify whether the server received the expected data */

		ret = gnutls_record_recv(server, buffer, sizeof(buffer));

		if (ret < 0) {

			myfail("error receiving data: %s\n",

				gnutls_strerror(ret));

		}

		if (ret != sizeof(TESTDATA) - 1) {

			myfail("error in received data size\n");

		}

		if (memcmp(buffer, TESTDATA, ret) != 0) {

			myfail("error in received data\n");

		}

		/* check handshake completion */

		ret =

		    gnutls_record_send(server, TESTDATA, sizeof(TESTDATA) - 1);

		if (ret < 0) {

			myfail("error sending false start data: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		side = "client";

		do {

			ret =

			    gnutls_record_recv(client, buffer, sizeof(buffer));

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

		if (ret < 0) {

			myfail("error receiving data: %s\n",

				gnutls_strerror(ret));

		}

	} else if (testno == TEST_RECV_SEND) {

		side = "server";

		ret =

		    gnutls_record_send(server, TESTDATA, sizeof(TESTDATA) - 1);

		if (ret < 0) {

			myfail("error sending false start data: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		side = "client";

		/* verify whether the server received the expected data */

		ret = gnutls_record_recv(client, buffer, sizeof(buffer));

		if (ret < 0) {

			myfail("error receiving data: %s\n",

				gnutls_strerror(ret));

		}

		if (ret != sizeof(TESTDATA) - 1) {

			myfail("error in received data size\n");

		}

		if (memcmp(buffer, TESTDATA, ret) != 0) {

			myfail("error in received data\n");

		}

	} else if (testno == TEST_HANDSHAKE_CALL) {

		/* explicit completion by caller */

		ret = gnutls_handshake(client);

		if (ret != GNUTLS_E_HANDSHAKE_DURING_FALSE_START) {

			myfail

			    ("error in explicit handshake after false start: %s\n",

			     gnutls_strerror(ret));

			exit(1);

		}

		goto exit;

	}

	side = "server";

	ret = gnutls_bye(server, GNUTLS_SHUT_WR);

	if (ret < 0) {

		myfail("error in server bye: %s\n",

			gnutls_strerror(ret));

	}

	side = "client";

	ret = gnutls_bye(client, GNUTLS_SHUT_RDWR);

	if (ret < 0) {

		myfail("error in client bye: %s\n",

			gnutls_strerror(ret));

	}

	success("%5s%s \tok\n", dtls?"dtls-":"tls-", name);

 exit:

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_dh_params_deinit(dh_params);

	gnutls_anon_free_server_credentials(serveranoncred);

	gnutls_anon_free_client_credentials(clientanoncred);

	gnutls_certificate_free_credentials(serverx509cred);

	gnutls_certificate_free_credentials(clientx509cred);

}

void doit(void)

{

	unsigned i, j;

	global_init();

	for (j=0;j<2;j++) {

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

			try("1.2 anon-dh  :", i, 0, "NORMAL:-VERS-ALL:+VERS-DTLS1.2:+VERS-TLS1.2:-KX-ALL:+ANON-DH", 3072, j);

			reset_buffers();

			try("1.2 anon-ecdh:", i, 0, "NORMAL:-VERS-ALL:+VERS-DTLS1.2:+VERS-TLS1.2:-KX-ALL:+ANON-ECDH", 2048, j);

			reset_buffers();

			try("1.2 ecdhe-rsa:", i, 1, "NORMAL:-VERS-ALL:+VERS-DTLS1.2:+VERS-TLS1.2:-KX-ALL:+ECDHE-RSA", 2048, j);

			reset_buffers();

			try("1.2 ecdhe-x25519-rsa:", i, 1, "NORMAL:-VERS-ALL:+VERS-DTLS1.2:+VERS-TLS1.2:-KX-ALL:+ECDHE-RSA:-CURVE-ALL:+CURVE-X25519", 2048, j);

			reset_buffers();

			try("1.2 ecdhe-ecdsa:", i, 1, "NORMAL:-VERS-ALL:+VERS-DTLS1.2:+VERS-TLS1.2:-KX-ALL:+ECDHE-ECDSA", 2048, j);

			reset_buffers();

			try("1.2 dhe-rsa-2048:", i, 0, "NORMAL:-VERS-ALL:+VERS-DTLS1.2:+VERS-TLS1.2:-KX-ALL:+DHE-RSA", 2048, j);

			reset_buffers();

			try("1.2 dhe-rsa-3072:", i, 1, "NORMAL:-VERS-ALL:+VERS-DTLS1.2:+VERS-TLS1.2:-KX-ALL:+DHE-RSA", 3072, j);

			reset_buffers();

		}

	}

	/* it should work, but false start will not be reported */

	try("1.3 secp256r1:", i, 0, "NORMAL:-VERS-ALL:+VERS-TLS1.3:-GROUP-ALL:+GROUP-SECP256R1", 2048, 0);

	reset_buffers();

	try("1.3 ffdhe2048:", i, 0, "NORMAL:-VERS-ALL:+VERS-TLS1.3:+GROUP-FFDHE2048", 2048, 0);

	reset_buffers();

	gnutls_global_deinit();

}