/*

 * Copyright (C) 2008-2012 Free Software Foundation, Inc.

 *

 * Author: Simon Josefsson

 *

 * 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 "eagain-common.h"

#include "utils.h"

const char *side = "";

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

{

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

}

/* This test attempts to transfer various sizes using AES-128-CBC.

 */

#define MAX_BUF 32*1024

#define MAX_SEND 16384

static char buffer1[MAX_BUF + 1];

static char buffer[MAX_BUF + 1];

static void try_send(gnutls_session_t client, gnutls_session_t server,

		     void *b1, ssize_t b1_size, void *b2, ssize_t b2_size,

		     gnutls_range_st * range)

{

	int ret, recvd;

	/* Try sending various other sizes */

	ret = gnutls_record_send_range(client, b1, b1_size, range);

	if (ret < 0) {

		fprintf(stderr, "Error sending %d bytes: %s\n",

			(int) b1_size, gnutls_strerror(ret));

		exit(1);

	}

	if (ret != b1_size) {

		fprintf(stderr, "Couldn't send %d bytes\n", (int) b1_size);

		exit(1);

	}

	recvd = 0;

	do {

		ret = gnutls_record_recv(server, b2, b2_size);

		if (ret < 0) {

			fprintf(stderr, "Error receiving %d bytes: %s\n",

				(int) b2_size, gnutls_strerror(ret));

			exit(1);

		}

		recvd += ret;

	}

	while (recvd < b1_size);

	if (recvd != b1_size) {

		fprintf(stderr, "Couldn't receive %d bytes, received %d\n",

			(int) b1_size, recvd);

		exit(1);

	}

}

void doit(void)

{

	/* Server stuff. */

	gnutls_anon_server_credentials_t s_anoncred;

	const gnutls_datum_t p3 =

	    { (unsigned char *) pkcs3, strlen(pkcs3) };

	static gnutls_dh_params_t dh_params;

	gnutls_session_t server;

	int sret = GNUTLS_E_AGAIN;

	/* Client stuff. */

	gnutls_anon_client_credentials_t c_anoncred;

	gnutls_session_t client;

	int cret = GNUTLS_E_AGAIN;

	/* Need to enable anonymous KX specifically. */

	gnutls_range_st range;

	/* General init. */

	global_init();

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(4711);

	/* Init server */

	gnutls_anon_allocate_server_credentials(&s_anoncred);

	gnutls_dh_params_init(&dh_params);

	gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);

	gnutls_anon_set_server_dh_params(s_anoncred, dh_params);

	gnutls_init(&server, GNUTLS_SERVER);

	gnutls_priority_set_direct(server,

				   "NONE:+VERS-TLS-ALL:+AES-128-CBC:+MAC-ALL:+SIGN-ALL:+COMP-NULL:+ANON-DH",

				   NULL);

	gnutls_credentials_set(server, GNUTLS_CRD_ANON, s_anoncred);

	gnutls_transport_set_push_function(server, server_push);

	gnutls_transport_set_pull_function(server, server_pull);

	gnutls_transport_set_ptr(server, server);

	/* Init client */

	gnutls_anon_allocate_client_credentials(&c_anoncred);

	gnutls_init(&client, GNUTLS_CLIENT);

	gnutls_priority_set_direct(client,

				   "NONE:+VERS-TLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-NULL:+ANON-DH",

				   NULL);

	gnutls_credentials_set(client, GNUTLS_CRD_ANON, c_anoncred);

	gnutls_transport_set_push_function(client, client_push);

	gnutls_transport_set_pull_function(client, client_pull);

	gnutls_transport_set_ptr(client, client);

	memset(buffer1, 0, sizeof(buffer1));

	HANDSHAKE(client, server);

	if (debug)

		success("Handshake established\n");

	memset(buffer1, 1, MAX_BUF);

	range.low = 1024;

	range.high = MAX_SEND;

	try_send(client, server, buffer1, MAX_SEND, buffer, MAX_BUF, &range);

	try_send(client, server, buffer1, 1024, buffer, MAX_BUF, &range);

	try_send(client, server, buffer1, 4096, buffer, MAX_BUF, &range);

	/*try_send(client, server, buffer1, 128, buffer, MAX_BUF, &range) */ ;

	if (debug)

		fputs("\n", stdout);

	gnutls_bye(client, GNUTLS_SHUT_RDWR);

	gnutls_bye(server, GNUTLS_SHUT_RDWR);

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_anon_free_client_credentials(c_anoncred);

	gnutls_anon_free_server_credentials(s_anoncred);

	gnutls_dh_params_deinit(dh_params);

	gnutls_global_deinit();

}