/*
* Copyright (C) 2012-2018 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos, Daiki Ueno
*
* 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 Lesser General Public License
* along with this program. If not, see
*/
#ifdef HAVE_CONFIG_H
#include
#endif
#include
#include
#if defined(_WIN32)
int main(void)
{
exit(77);
}
#else
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "cert-common.h"
#include "utils.h"
#define MAX_BUF 1024
#define HIGH(x) (3*x)
static void terminate(void);
static size_t total;
/* This program tests the robustness of record sending with padding.
*/
static void server_log_func(int level, const char *str)
{
fprintf(stderr, "server|<%d>| %s", level, str);
}
static void client_log_func(int level, const char *str)
{
fprintf(stderr, "client|<%d>| %s", level, str);
}
/* A very basic TLS client, with anonymous authentication.
*/
static ssize_t
push(gnutls_transport_ptr_t tr, const void *data, size_t len)
{
int fd = (long int) tr;
total += len;
return send(fd, data, len, 0);
}
struct test_st {
const char *name;
size_t pad;
size_t data;
const char *prio;
unsigned flags;
int sret;
};
static void client(int fd, struct test_st *test)
{
int ret;
char buffer[MAX_BUF + 1];
gnutls_anon_client_credentials_t anoncred;
gnutls_certificate_credentials_t x509_cred;
gnutls_session_t session;
/* Need to enable anonymous KX specifically. */
global_init();
if (debug) {
gnutls_global_set_log_function(client_log_func);
gnutls_global_set_log_level(7);
}
gnutls_anon_allocate_client_credentials(&anoncred);
gnutls_certificate_allocate_credentials(&x509_cred);
assert(gnutls_init(&session, GNUTLS_CLIENT|test->flags)>=0);
assert(gnutls_priority_set_direct(session, test->prio, NULL)>=0);
/* put the anonymous credentials to the current session
*/
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
gnutls_transport_set_int(session, fd);
/* Perform the TLS handshake
*/
do {
ret = gnutls_handshake(session);
}
while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
if (ret < 0) {
fail("client: Handshake failed\n");
gnutls_perror(ret);
exit(1);
} else {
if (debug)
success("client: Handshake was completed\n");
}
if (debug)
success("client: TLS version is: %s\n",
gnutls_protocol_get_name
(gnutls_protocol_get_version(session)));
do {
do {
ret = gnutls_record_recv(session, buffer, sizeof(buffer));
} while (ret == GNUTLS_E_AGAIN
|| ret == GNUTLS_E_INTERRUPTED);
} while (ret > 0);
if (ret == 0) {
if (debug)
success
("client: Peer has closed the TLS connection\n");
goto end;
} else if (ret < 0) {
if (ret != 0) {
fail("client: Error: %s\n", gnutls_strerror(ret));
exit(1);
}
}
gnutls_bye(session, GNUTLS_SHUT_WR);
end:
close(fd);
gnutls_deinit(session);
gnutls_anon_free_client_credentials(anoncred);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
}
/* These are global */
pid_t child;
static void terminate(void)
{
assert(child);
kill(child, SIGTERM);
exit(1);
}
static void server(int fd, struct test_st *test)
{
int ret;
char buffer[MAX_BUF + 1];
gnutls_session_t session;
gnutls_anon_server_credentials_t anoncred;
gnutls_certificate_credentials_t x509_cred;
size_t expected;
/* this must be called once in the program
*/
global_init();
memset(buffer, 0, sizeof(buffer));
if (debug) {
gnutls_global_set_log_function(server_log_func);
gnutls_global_set_log_level(4711);
}
gnutls_certificate_allocate_credentials(&x509_cred);
gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,
&server_key,
GNUTLS_X509_FMT_PEM);
gnutls_anon_allocate_server_credentials(&anoncred);
assert(gnutls_init(&session, GNUTLS_SERVER|test->flags)>=0);
assert(gnutls_priority_set_direct(session, test->prio, NULL)>=0);
gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
gnutls_transport_set_int(session, fd);
do {
ret = gnutls_handshake(session);
}
while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
if (ret < 0) {
close(fd);
gnutls_deinit(session);
fail("server: Handshake has failed (%s)\n\n",
gnutls_strerror(ret));
terminate();
}
if (debug)
success("server: Handshake was completed\n");
if (debug)
success("server: TLS version is: %s\n",
gnutls_protocol_get_name
(gnutls_protocol_get_version(session)));
gnutls_transport_set_push_function(session, push);
assert(test->data <= sizeof(buffer));
total = 0;
do {
ret =
gnutls_record_send2(session, buffer,
test->data,
test->pad, 0);
} while (ret == GNUTLS_E_AGAIN
|| ret == GNUTLS_E_INTERRUPTED);
if (test->sret < 0) {
if (ret >= 0)
fail("server: expected failure got success!\n");
if (ret != test->sret)
fail("server: expected different failure: '%s', got: '%s'\n",
gnutls_strerror(test->sret), gnutls_strerror(ret));
goto finish;
}
if (ret < 0) {
fail("Error sending packet: %s\n",
gnutls_strerror(ret));
terminate();
}
expected = test->data + test->pad + gnutls_record_overhead_size(session);
if (total != expected) {
fail("Sent data (%u) are lower than expected (%u)\n",
(unsigned) total, (unsigned) expected);
terminate();
}
finish:
/* do not wait for the peer to close the connection.
*/
gnutls_bye(session, GNUTLS_SHUT_WR);
close(fd);
gnutls_deinit(session);
gnutls_anon_free_server_credentials(anoncred);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
if (debug)
success("server: finished\n");
}
static void start(struct test_st *test)
{
int fd[2];
int ret;
success("running %s\n", test->name);
ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
if (ret < 0) {
perror("socketpair");
exit(1);
}
child = fork();
if (child < 0) {
perror("fork");
fail("fork");
exit(1);
}
if (child) {
/* parent */
close(fd[1]);
server(fd[0], test);
kill(child, SIGTERM);
} else {
close(fd[0]);
client(fd[1], test);
exit(0);
}
}
#define AES_GCM "NONE:+VERS-TLS1.3:+AES-256-GCM:+AEAD:+SIGN-ALL:+GROUP-ALL"
static void ch_handler(int sig)
{
int status;
wait(&status);
check_wait_status(status);
return;
}
struct test_st tests[] =
{
{
.name = "AES-GCM with max pad",
.pad = HIGH(MAX_BUF+1)-(MAX_BUF+1),
.data = MAX_BUF,
.prio = AES_GCM,
.flags = 0
},
{
.name = "AES-GCM with zero pad",
.pad = 0,
.data = MAX_BUF,
.prio = AES_GCM,
.flags = 0
},
{
.name = "AES-GCM with 1-byte pad",
.pad = 1,
.data = MAX_BUF,
.prio = AES_GCM,
.flags = 0
},
{
.name = "AES-GCM with pad, but no data",
.pad = 16,
.data = 0,
.prio = AES_GCM,
.flags = 0
},
{
.name = "AES-GCM with max pad and safe padding check",
.pad = HIGH(MAX_BUF+1)-(MAX_BUF+1),
.data = MAX_BUF,
.prio = AES_GCM,
.flags = GNUTLS_SAFE_PADDING_CHECK
},
{
.name = "AES-GCM with zero pad and safe padding check",
.pad = 0,
.data = MAX_BUF,
.prio = AES_GCM,
.flags = GNUTLS_SAFE_PADDING_CHECK
},
{
.name = "AES-GCM with 1-byte pad and safe padding check",
.pad = 1,
.data = MAX_BUF,
.prio = AES_GCM,
.flags = GNUTLS_SAFE_PADDING_CHECK
},
{
.name = "AES-GCM with pad, but no data and safe padding check",
.pad = 16,
.data = 0,
.prio = AES_GCM,
.flags = GNUTLS_SAFE_PADDING_CHECK
},
{
.name = "AES-GCM with pad, but no data and no pad",
.pad = 0,
.data = 0,
.prio = AES_GCM,
.flags = GNUTLS_SAFE_PADDING_CHECK,
.sret = GNUTLS_E_INVALID_REQUEST
},
};
void doit(void)
{
unsigned i;
signal(SIGCHLD, ch_handler);
for (i=0;i