openssl/fuzz/ct.c
Kurt Roeckx d69d8f904c Make the fuzzers more reproducible
We want to be in the same global state each time we come in
FuzzerTestOneInput(). There are various reasons why we might not be that
include:
- Initialization that happens on first use. This is mostly the
  RUN_ONCE() things, or loading of error strings.
- Results that get cached. For instance a stack that is sorted, RSA
  blinding that has been set up, ...

So I try to trigger as much as possible in FuzzerInitialize(), and for
things I didn't find out how to trigger this it needs to happen in
FuzzerTestOneInput().

Reviewed-by: Rich Salz <rsalz@openssl.org>
GH: 
2016-12-03 00:14:15 +01:00

51 lines
1.2 KiB
C

/*
* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL licenses, (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.
*/
/*
* Fuzz the SCT parser.
*/
#include <stdio.h>
#include <openssl/ct.h>
#include <openssl/err.h>
#include "fuzzer.h"
int FuzzerInitialize(int *argc, char ***argv)
{
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
CRYPTO_free_ex_index(0, -1);
ERR_get_state();
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
const uint8_t **pp = &buf;
unsigned char *der = NULL;
STACK_OF(SCT) *scts = d2i_SCT_LIST(NULL, pp, len);
if (scts != NULL) {
BIO *bio = BIO_new(BIO_s_null());
SCT_LIST_print(scts, bio, 4, "\n", NULL);
BIO_free(bio);
if (i2d_SCT_LIST(scts, &der)) {
/* Silence unused result warning */
}
OPENSSL_free(der);
SCT_LIST_free(scts);
}
ERR_clear_error();
return 0;
}
void FuzzerCleanup(void)
{
}