tests/cve-2009-1416.c

   1 /*
   2  * Copyright (C) 2009 Free Software Foundation
   3  *
   4  * Author: Simon Josefsson
   5  *
   6  * This file is part of GNUTLS.
   7  *
   8  * GNUTLS is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * GNUTLS is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with GNUTLS; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 # include <config.h>
  25 #endif
  26
  27 /*
  28  * Small code to reproduce the CVE-2009-1416 bad DSA key problem.
  29  *
  30  * Build it using:
  31  *
  32  *  gcc -o cve-2009-1416 cve-2009-1416.c -lgnutls
  33  *
  34  * If your gnutls library is OK then running it will print 'success!'.
  35  *
  36  * If your gnutls library is buggy then running it will print 'buggy'.
  37  *
  38  */
  39
  40 #include <stdio.h>
  41 #include <stdarg.h>
  42 #include <stdlib.h>
  43
  44 #include <gcrypt.h>
  45 #include <gnutls/gnutls.h>
  46 #include <gnutls/x509.h>
  47
  48 int
  49 main (void)
  50 {
  51   gnutls_x509_privkey_t key;
  52   gnutls_datum_t p, q, g, y, x;
  53   int ret;
  54
  55   gnutls_global_init ();
  56   gcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0);
  57
  58   ret = gnutls_x509_privkey_init (&key);
  59   if (ret < 0)
  60     return 1;
  61
  62   ret = gnutls_x509_privkey_generate (key, GNUTLS_PK_DSA, 512, 0);
  63   if (ret < 0)
  64     return 1;
  65
  66   ret = gnutls_x509_privkey_export_dsa_raw (key, &p, &q, &g, &y, &x);
  67   if (ret < 0)
  68     return 1;
  69
  70   if (q.size == 3 && memcmp (q.data, "\x01\x00\x01", 3) == 0)
  71     {
  72       printf ("buggy\n");
  73       return 1;
  74     }
  75   else
  76     printf ("success!\n");
  77
  78   gnutls_free (p.data);
  79   gnutls_free (q.data);
  80   gnutls_free (g.data);
  81   gnutls_free (y.data);
  82   gnutls_free (x.data);
  83
  84   gnutls_x509_privkey_deinit (key);
  85   gnutls_global_deinit ();
  86
  87   return 0;
  88 }