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/*
* Copyright(c) 2019 Free Software Foundation, Inc.
*
* This file is part of libtasn1.
*
* Libtasn1 is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Libtasn1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libtasn1. If not, see <https://www.gnu.org/licenses/>.
*
* This fuzzer is testing asn1_parser2tree()'s robustness with arbitrary ASN.1
* input data.
*/
#include <config.h>
#include <stdlib.h> // malloc, free
#include <string.h> // strcmp, memcpy
#include "libtasn1.h"
#include "fuzzer.h"
static const uint8_t *g_data;
static size_t g_size;
#if defined HAVE_DLFCN_H && defined HAVE_FMEMOPEN
#include <dlfcn.h>
#ifdef RTLD_NEXT /* Not defined e.g. on CygWin */
FILE *fopen(const char *pathname, const char *mode) {
FILE * (*libc_fopen)(const char *, const char *) =
(FILE * (*)(const char *, const char *)) dlsym(RTLD_NEXT, "fopen");
if (!strcmp(pathname, "pkix.asn"))
return fmemopen((void *) g_data, g_size, mode);
return libc_fopen(pathname, mode);
}
#endif
#endif
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
char errorDescription[ASN1_MAX_ERROR_DESCRIPTION_SIZE];
asn1_node definitions = NULL;
if (size > 10000) // same as max_len = 10000 in .options file
return 0;
g_data = data;
g_size = size;
int rc = asn1_parser2tree("pkix.asn", &definitions, errorDescription);
if (rc == ASN1_SUCCESS) {
asn1_delete_structure(&definitions);
}
return 0;
}