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/*
# Copyright 2016 Google Inc.
# Copyright 2017 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
################################################################################
*/
#include <assert.h>
#include <fcntl.h>
#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <gnutls/crypto.h>
#include <gnutls/gnutls.h>
#include "handshake.h"
#include "fuzzer.h"
int __attribute__ ((visibility ("protected")))
gnutls_rnd(gnutls_rnd_level_t level, void *data, size_t len)
{
memset(data, 0xff, len);
/* Flip the first byte to avoid infinite loop in the RSA
* blinding code of Nettle */
if (len > 0)
memset(data, 0x0, 1);
return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size)
{
int res;
gnutls_session_t session;
gnutls_certificate_credentials_t xcred;
struct mem_st memdata;
unsigned int retry;
res = gnutls_init(&session, GNUTLS_CLIENT);
assert(res >= 0);
res = gnutls_certificate_allocate_credentials(&xcred);
assert(res >= 0);
res = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
assert(res >= 0);
/*res = gnutls_set_default_priority(session);*/
res = gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3", NULL);
assert(res >= 0);
memdata.data = data;
memdata.size = size;
gnutls_transport_set_push_function(session, error_push);
gnutls_transport_set_pull_function(session, error_pull);
gnutls_handshake_set_read_function(session, handshake_discard);
retry = 0;
do {
res = gnutls_handshake(session);
if (res == GNUTLS_E_AGAIN) {
if (handshake_pull(session, &memdata) < 0) {
res = GNUTLS_E_INTERNAL_ERROR;
break;
}
if (retry > HANDSHAKE_MAX_RETRY_COUNT) {
break;
}
retry++;
} else {
retry = 0;
}
} while (res < 0 && gnutls_error_is_fatal(res) == 0);
gnutls_deinit(session);
gnutls_certificate_free_credentials(xcred);
return 0;
}
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