1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* 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;
}
|
