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/*
* Copyright (C) 2008-2012 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 <https://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <assert.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[64];
unsigned char buf2[64];
pid_t pid;
int ret;
FILE *fp;
unsigned i;
global_init();
for (i = GNUTLS_RND_NONCE; i <= GNUTLS_RND_KEY; i++) {
pid = fork();
if (pid == 0) {
fp = fopen(FILENAME, "w");
if (fp == NULL)
fail("cannot open file");
assert(gnutls_rnd(i, buf1, sizeof(buf1)) >= 0);
if (debug)
dump("buf1", buf1, sizeof(buf1));
fwrite(buf1, 1, sizeof(buf1), fp);
fclose(fp);
gnutls_global_deinit();
exit(0);
} else {
/* daddy */
assert(gnutls_rnd(i, buf2, sizeof(buf2)) >= 0);
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 (%u).\n", i);
return;
}
if (memcmp(buf1, buf2, sizeof(buf1)) == 0) {
fail("error in the random generator (%u). Produces same valus after fork()\n", i);
return;
}
if (debug)
success("success\n");
}
}
gnutls_global_deinit();
}
#else
void doit(void)
{
exit(77);
}
#endif
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