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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
*
* Author: Simon Josefsson
*
* This file is part of GnuTLS.
*
* GnuTLS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuTLS 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GnuTLS; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*
* Small code to reproduce the CVE-2009-1416 bad DSA key problem.
*
* Build it using:
*
* gcc -o cve-2009-1416 cve-2009-1416.c -lgnutls
*
* If your gnutls library is OK then running it will print 'success!'.
*
* If your gnutls library is buggy then running it will print 'buggy'.
*
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
int
main (void)
{
gnutls_x509_privkey_t key;
gnutls_datum_t p, q, g, y, x;
int ret;
gnutls_global_init ();
ret = gnutls_x509_privkey_init (&key);
if (ret < 0)
return 1;
ret = gnutls_x509_privkey_generate (key, GNUTLS_PK_DSA, 512, 0);
if (ret < 0)
return 1;
ret = gnutls_x509_privkey_export_dsa_raw (key, &p, &q, &g, &y, &x);
if (ret < 0)
return 1;
if (q.size == 3 && memcmp (q.data, "\x01\x00\x01", 3) == 0)
{
printf ("buggy\n");
return 1;
}
gnutls_free (p.data);
gnutls_free (q.data);
gnutls_free (g.data);
gnutls_free (y.data);
gnutls_free (x.data);
gnutls_x509_privkey_deinit (key);
gnutls_global_deinit ();
return 0;
}
|
