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/*
* Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 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.openssl.org/source/license.html
* or in the file LICENSE in the source distribution.
*/
#include <time.h>
#include <openssl/rand.h>
#include <openssl/ssl.h>
#include <openssl/rsa.h>
#include <openssl/dsa.h>
#include <openssl/ec.h>
#include <openssl/dh.h>
#include <openssl/err.h>
#include "fuzzer.h"
/* unused, to avoid warning. */
static int idx;
#define FUZZTIME 1485898104
#define TIME_IMPL(t) { if (t != NULL) *t = FUZZTIME; return FUZZTIME; }
/*
* This might not work in all cases (and definitely not on Windows
* because of the way linkers are) and callees can still get the
* current time instead of the fixed time. This will just result
* in things not being fully reproducible and have a slightly
* different coverage.
*/
#if !defined(_WIN32)
time_t time(time_t *t) TIME_IMPL(t)
#endif
int FuzzerInitialize(int *argc, char ***argv)
{
STACK_OF(SSL_COMP) *comp_methods;
FuzzerSetRand();
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS | OPENSSL_INIT_ASYNC, NULL);
OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
ERR_clear_error();
CRYPTO_free_ex_index(0, -1);
idx = SSL_get_ex_data_X509_STORE_CTX_idx();
comp_methods = SSL_COMP_get_compression_methods();
if (comp_methods != NULL)
sk_SSL_COMP_sort(comp_methods);
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
SSL *client;
BIO *in;
BIO *out;
SSL_CTX *ctx;
if (len == 0)
return 0;
/*
* TODO: use the ossltest engine (optionally?) to disable crypto checks.
*/
/* This only fuzzes the initial flow from the client so far. */
ctx = SSL_CTX_new(SSLv23_method());
client = SSL_new(ctx);
OPENSSL_assert(SSL_set_min_proto_version(client, 0) == 1);
OPENSSL_assert(SSL_set_cipher_list(client, "ALL:eNULL:@SECLEVEL=0") == 1);
SSL_set_tlsext_host_name(client, "localhost");
in = BIO_new(BIO_s_mem());
out = BIO_new(BIO_s_mem());
SSL_set_bio(client, in, out);
SSL_set_connect_state(client);
OPENSSL_assert((size_t)BIO_write(in, buf, len) == len);
if (SSL_do_handshake(client) == 1) {
/* Keep reading application data until error or EOF. */
uint8_t tmp[1024];
for (;;) {
if (SSL_read(client, tmp, sizeof(tmp)) <= 0) {
break;
}
}
}
SSL_free(client);
ERR_clear_error();
SSL_CTX_free(ctx);
return 0;
}
void FuzzerCleanup(void)
{
FuzzerClearRand();
}
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