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/*
* Copyright (C) 2001 Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <gnutls_int.h>
#include <gnutls_random.h>
#include <gnutls_errors.h>
#ifndef USE_GCRYPT
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# endif
# include <sys/types.h>
# include <sys/stat.h>
# include <fcntl.h>
#endif
/* fills the buffer 'res' with random bytes of 'bytes' long.
* level is WEAK, STRONG, or VERY_STRONG (libgcrypt)
*/
int _gnutls_get_random(opaque * res, int bytes, int level)
{
#ifndef USE_GCRYPT
int fd;
char *device;
device = "dev/urandom";
fd = open(device, O_RDONLY);
if (device == NULL || fd < 0) {
_gnutls_log( "Could not open random device\n");
return GNUTLS_E_FILE_ERROR;
} else {
read(fd, res, bytes);
close(fd);
}
return 0;
#else /* using gcrypt */
gcry_randomize( res, bytes, level);
return 0;
#endif
}
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