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/*
* Copyright (C) 2008-2012 Free Software Foundation, Inc.
*
* Author: Simon Josefsson, 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 <gnutls/dtls.h>
#include <gnutls/crypto.h>
#include "utils.h"
#define RANDOMIZE
#define IGNORE_PUSH
#include "eagain-common.h"
const char *side = "";
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s|<%d>| %s", side, level, str);
}
static int handshake = 0;
#define MAX_BUF 1024
#define MSG "Hello TLS, and hi and how are you and more data here... and more... and even more and even more more data..."
static ssize_t
client_push_300(gnutls_transport_ptr_t tr, const void *data, size_t len)
{
size_t newlen;
if (len > 300) {
gnutls_transport_set_errno((gnutls_session_t) tr,
EMSGSIZE);
return -1;
}
len = min(len, sizeof(to_server) - to_server_len);
newlen = to_server_len + len;
memcpy(to_server + to_server_len, data, len);
to_server_len = newlen;
#ifdef EAGAIN_DEBUG
fprintf(stderr, "eagain: pushed %d bytes to server (avail: %d)\n",
(int) len, (int) to_server_len);
#endif
return len;
}
static ssize_t
server_push_300(gnutls_transport_ptr_t tr, const void *data, size_t len)
{
size_t newlen;
if (len > 300) {
gnutls_transport_set_errno((gnutls_session_t) tr,
EMSGSIZE);
return -1;
}
len = min(len, sizeof(to_client) - to_client_len);
newlen = to_client_len + len;
memcpy(to_client + to_client_len, data, len);
to_client_len = newlen;
#ifdef EAGAIN_DEBUG
fprintf(stderr, "eagain: pushed %d bytes to client (avail: %d)\n",
(int) len, (int) to_client_len);
#endif
return len;
}
void doit(void)
{
/* Server stuff. */
gnutls_anon_server_credentials_t s_anoncred;
const gnutls_datum_t p3 = { (void *) pkcs3, strlen(pkcs3) };
static gnutls_dh_params_t dh_params;
gnutls_session_t server;
int sret, cret;
/* Client stuff. */
gnutls_anon_client_credentials_t c_anoncred;
gnutls_session_t client;
/* Need to enable anonymous KX specifically. */
char buffer[MAX_BUF + 1];
ssize_t ns;
int ret, transferred = 0, msglen;
/* General init. */
global_init();
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(99);
/* 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_DATAGRAM | GNUTLS_NONBLOCK);
ret =
gnutls_priority_set_direct(server,
"NONE:+VERS-DTLS1.2:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH",
NULL);
if (ret < 0)
exit(1);
gnutls_credentials_set(server, GNUTLS_CRD_ANON, s_anoncred);
gnutls_transport_set_push_function(server, server_push_300);
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(&c_anoncred);
gnutls_init(&client,
GNUTLS_CLIENT | GNUTLS_DATAGRAM | GNUTLS_NONBLOCK);
cret =
gnutls_priority_set_direct(client,
"NONE:+VERS-DTLS1.2:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH",
NULL);
if (cret < 0)
exit(1);
gnutls_credentials_set(client, GNUTLS_CRD_ANON, c_anoncred);
gnutls_transport_set_push_function(client, client_push_300);
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 = 1;
HANDSHAKE_DTLS(client, server);
if (gnutls_protocol_get_version(client) != GNUTLS_DTLS1_2) {
fail("Error in negotiated version\n");
exit(1);
}
handshake = 0;
if (debug)
success("Handshake established\n");
do {
ret = gnutls_record_send(client, MSG, strlen(MSG));
}
while (ret == GNUTLS_E_AGAIN);
//success ("client: sent %d\n", ns);
msglen = strlen(MSG);
TRANSFER(client, server, MSG, msglen, buffer, MAX_BUF);
if (debug)
fputs("\n", stdout);
gnutls_bye(client, GNUTLS_SHUT_WR);
gnutls_bye(server, GNUTLS_SHUT_WR);
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();
}
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