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/*
* Copyright (C) 2008, 2010, 2012 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#if !defined(_WIN32)
#include <sys/wait.h>
#endif
#include "utils.h"
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#if !defined(_WIN32)
static void dump(const char* name, unsigned char* buf, int buf_size)
{
int i;
printf("%s: ", name);
for(i=0;i<buf_size;i++)
printf("%.2x:", buf[i]);
printf("\n");
}
#define FILENAME "./rng-test"
void
doit (void)
{
unsigned char buf1[32];
unsigned char buf2[32];
pid_t pid;
int ret;
FILE* fp;
gnutls_global_init ();
pid = fork();
if (pid == 0)
{
fp = fopen(FILENAME, "w");
if (fp == NULL)
fail("cannot open file");
gnutls_rnd (GNUTLS_RND_RANDOM, buf1, sizeof (buf1));
if (debug) dump("buf1", buf1, sizeof(buf1));
fwrite(buf1, 1, sizeof(buf1), fp);
fclose(fp);
}
else
{
/* daddy */
gnutls_rnd (GNUTLS_RND_RANDOM, buf2, sizeof (buf2));
if (debug) dump("buf2", buf2, sizeof(buf2));
waitpid(pid, NULL, 0);
fp = fopen(FILENAME, "r");
if (fp == NULL)
fail("cannot open file");
ret = fread(buf1, 1, sizeof(buf1), fp);
fclose(fp);
remove(FILENAME);
if (ret != sizeof(buf1))
{
fail("error testing the random generator.");
return;
}
if (memcmp(buf1, buf2, sizeof(buf1))==0)
{
fail("error in the random generator. Produces same valus after fork()");
return;
}
if(debug)
success("success\n");
}
}
#else
void
doit (void)
{
exit (77);
}
#endif
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