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/*
* 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>
/* In this test we check whether the server will bail out after receiving
* a bunch of warning alerts. That is to avoid DoS due to the asymmetry of
* cost of sending an alert vs the cost of receiving.
*/
#if defined(_WIN32)
/* socketpair isn't supported on Win32. */
int main(int argc, char **argv)
{
exit(77);
}
#else
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#if !defined(_WIN32)
#include <sys/wait.h>
#endif
#include <unistd.h>
#include <assert.h>
#include <gnutls/gnutls.h>
#include "utils.h"
#include "cert-common.h"
pid_t child;
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "%s |<%d>| %s", child ? "server" : "client", level,
str);
}
static unsigned char tls_hello[] =
"\x16\x03\x01\x01\x38\x01\x00\x01"
"\x34\x03\x03\xfc\x77\xa8\xc7\x46"
"\xf7\xfd\x04\x5b\x3c\xc6\xfa\xa4"
"\xea\x3e\xfa\x76\x99\xfe\x1a\x2e"
"\xe0\x79\x17\xb2\x27\x06\xc4\x5c"
"\xd8\x78\x31\x00\x00\xb6\xc0\x30"
"\xc0\x2c\xc0\x28\xc0\x24\xc0\x14"
"\xc0\x0a\x00\xa5\x00\xa3\x00\xa1"
"\x00\x9f\x00\x6b\x00\x6a\x00\x69"
"\x00\x68\x00\x39\x00\x38\x00\x37"
"\x00\x36\x00\x88\x00\x87\x00\x86"
"\x00\x85\xc0\x32\xc0\x2e\xc0\x2a"
"\xc0\x26\xc0\x0f\xc0\x05\x00\x9d"
"\x00\x3d\x00\x35\x00\x84\xc0\x2f"
"\xc0\x2b\xc0\x27\xc0\x23\xc0\x13"
"\xc0\x09\x00\xa4\x00\xa2\x00\xa0"
"\x00\x9e\x00\x67\x00\x40\x00\x3f"
"\x00\x3e\x00\x33\x00\x32\x00\x31"
"\x00\x30\x00\x9a\x00\x99\x00\x98"
"\x00\x97\x00\x45\x00\x44\x00\x43"
"\x00\x42\xc0\x31\xc0\x2d\xc0\x29"
"\xc0\x25\xc0\x0e\xc0\x04\x00\x9c"
"\x00\x3c\x00\x2f\x00\x96\x00\x41"
"\x00\x07\xc0\x11\xc0\x07\xc0\x0c"
"\xc0\x02\x00\x05\x00\x04\xc0\x12"
"\xc0\x08\x00\x16\x00\x13\x00\x10"
"\x00\x0d\xc0\x0d\xc0\x03\x00\x0a"
"\x00\x15\x00\x12\x00\x0f\x00\x0c"
"\x00\x09\x00\xff\x01\x00\x00\x55"
"\x00\x0b\x00\x04\x03\x00\x01\x02"
"\x00\x0a\x00\x1c\x00\x1a\x00\x17"
"\x00\x19\x00\x1c\x00\x1b\x00\x18"
"\x00\x1a\x00\x16\x00\x0e\x00\x0d"
"\x00\x0b\x00\x0c\x00\x09\x00\x0a"
"\x00\x23\x00\x00\x00\x0d\x00\x20"
"\x00\x1e\x06\x01\x06\x02\x06\x03"
"\x05\x01\x05\x02\x05\x03\x04\x01"
"\x04\x02\x04\x03\x03\x01\x03\x02"
"\x03\x03\x02\x01\x02\x02\x02\x03"
"\x00\x0f\x00\x01\x01";
static unsigned char tls_alert[] =
"\x15\x03\x03\x00\x02\x00\x0A";
static void client(int sd)
{
char buf[1024];
int ret;
unsigned i;
/* send a TLS hello, and then a list of warning alerts */
ret = send(sd, tls_hello, sizeof(tls_hello)-1, 0);
if (ret < 0)
fail("error sending hello\n");
ret = recv(sd, buf, sizeof(buf), 0);
if (ret < 0)
fail("error receiving hello\n");
for (i=0;i<128;i++) {
ret = send(sd, tls_alert, sizeof(tls_alert)-1, 0);
if (ret < 0)
fail("error sending hello\n");
}
close(sd);
}
static void server(int sd)
{
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
int ret;
unsigned loops;
/* this must be called once in the program
*/
global_init();
gnutls_global_set_log_function(tls_log_func);
if (debug)
gnutls_global_set_log_level(6);
gnutls_certificate_allocate_credentials(&x509_cred);
gnutls_certificate_set_x509_trust_mem(x509_cred, &ca3_cert,
GNUTLS_X509_FMT_PEM);
gnutls_certificate_set_x509_key_mem(x509_cred, &server_ca3_localhost_cert,
&server_ca3_key,
GNUTLS_X509_FMT_PEM);
if (debug)
success("Launched, generating DH parameters...\n");
gnutls_init(&session, GNUTLS_SERVER);
/* avoid calling all the priority functions, since the defaults
* are adequate.
*/
assert(gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.2", NULL)>=0);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
gnutls_transport_set_int(session, sd);
loops = 0;
do {
ret = gnutls_handshake(session);
loops++;
if (loops > 64)
fail("Too many loops in the handshake!\n");
} while (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_WARNING_ALERT_RECEIVED);
if (ret >= 0) {
fail("server: Handshake succeeded unexpectedly\n");
}
close(sd);
gnutls_deinit(session);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
void doit(void)
{
int sockets[2];
int err;
err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
if (err == -1) {
perror("socketpair");
fail("socketpair failed\n");
return;
}
child = fork();
if (child < 0) {
perror("fork");
fail("fork");
return;
}
if (child) {
int status;
server(sockets[0]);
wait(&status);
check_wait_status(status);
} else {
client(sockets[1]);
exit(0);
}
}
#endif /* _WIN32 */
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