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/*
* Copyright (C) 2015-2018 Red Hat, Inc.
*
* 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 <https://www.gnu.org/licenses/>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <stdint.h>
#include "virt-time.h"
#include "../../lib/tls13/anti_replay.h"
#include "../../lib/system.h"
/* utils.h must be loaded after gnutls_int.h, as it redefines some
* macros from gnulib */
#include "utils.h"
#define MAX_CLIENT_HELLO_RECORDED 10
struct storage_st {
gnutls_datum_t entries[MAX_CLIENT_HELLO_RECORDED];
size_t num_entries;
};
static int storage_add(void *ptr, time_t expires, const gnutls_datum_t *key,
const gnutls_datum_t *value)
{
struct storage_st *storage = ptr;
gnutls_datum_t *datum;
size_t i;
for (i = 0; i < storage->num_entries; i++) {
if (key->size == storage->entries[i].size &&
memcmp(storage->entries[i].data, key->data, key->size) ==
0) {
return GNUTLS_E_DB_ENTRY_EXISTS;
}
}
/* If the maximum number of ClientHello exceeded, reject early
* data until next time.
*/
if (storage->num_entries == MAX_CLIENT_HELLO_RECORDED)
return GNUTLS_E_DB_ERROR;
datum = &storage->entries[storage->num_entries];
datum->data = gnutls_malloc(key->size);
if (!datum->data)
return GNUTLS_E_MEMORY_ERROR;
memcpy(datum->data, key->data, key->size);
datum->size = key->size;
storage->num_entries++;
return 0;
}
static void storage_clear(struct storage_st *storage)
{
size_t i;
for (i = 0; i < storage->num_entries; i++)
gnutls_free(storage->entries[i].data);
storage->num_entries = 0;
}
void doit(void)
{
gnutls_anti_replay_t anti_replay;
gnutls_datum_t key = { (unsigned char *)"\xFF\xFF\xFF\xFF", 4 };
struct timespec creation_time;
struct storage_st storage;
int ret;
virt_time_init();
memset(&storage, 0, sizeof(storage));
/* server_ticket_age < client_ticket_age */
ret = gnutls_anti_replay_init(&anti_replay);
assert(ret == 0);
gnutls_anti_replay_set_window(anti_replay, 10000);
gnutls_anti_replay_set_add_function(anti_replay, storage_add);
gnutls_anti_replay_set_ptr(anti_replay, &storage);
mygettime(&creation_time);
ret = _gnutls_anti_replay_check(anti_replay, 10000, &creation_time,
&key);
if (ret != GNUTLS_E_ILLEGAL_PARAMETER)
fail("error is not returned, while server_ticket_age < client_ticket_age\n");
gnutls_anti_replay_deinit(anti_replay);
storage_clear(&storage);
/* server_ticket_age - client_ticket_age > window */
ret = gnutls_anti_replay_init(&anti_replay);
assert(ret == 0);
gnutls_anti_replay_set_add_function(anti_replay, storage_add);
gnutls_anti_replay_set_ptr(anti_replay, &storage);
gnutls_anti_replay_set_window(anti_replay, 10000);
mygettime(&creation_time);
virt_sec_sleep(30);
ret = _gnutls_anti_replay_check(anti_replay, 10000, &creation_time,
&key);
if (ret != GNUTLS_E_EARLY_DATA_REJECTED)
fail("early data is NOT rejected, while freshness check fails\n");
gnutls_anti_replay_deinit(anti_replay);
storage_clear(&storage);
/* server_ticket_age - client_ticket_age < window */
ret = gnutls_anti_replay_init(&anti_replay);
assert(ret == 0);
gnutls_anti_replay_set_add_function(anti_replay, storage_add);
gnutls_anti_replay_set_ptr(anti_replay, &storage);
gnutls_anti_replay_set_window(anti_replay, 10000);
mygettime(&creation_time);
virt_sec_sleep(15);
ret = _gnutls_anti_replay_check(anti_replay, 10000, &creation_time,
&key);
if (ret != 0)
fail("early data is rejected, while freshness check succeeds\n");
ret = _gnutls_anti_replay_check(anti_replay, 10000, &creation_time,
&key);
if (ret != GNUTLS_E_EARLY_DATA_REJECTED)
fail("early data is NOT rejected for a duplicate key\n");
gnutls_anti_replay_deinit(anti_replay);
storage_clear(&storage);
}
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