t_random.c revision 272343
1272343Sngie/* $NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $ */ 2272343Sngie 3272343Sngie/*- 4272343Sngie * Copyright (c) 2012 The NetBSD Foundation, Inc. 5272343Sngie * All rights reserved. 6272343Sngie * 7272343Sngie * This code is derived from software contributed to The NetBSD Foundation 8272343Sngie * by Jukka Ruohonen. 9272343Sngie * 10272343Sngie * Redistribution and use in source and binary forms, with or without 11272343Sngie * modification, are permitted provided that the following conditions 12272343Sngie * are met: 13272343Sngie * 1. Redistributions of source code must retain the above copyright 14272343Sngie * notice, this list of conditions and the following disclaimer. 15272343Sngie * 2. Redistributions in binary form must reproduce the above copyright 16272343Sngie * notice, this list of conditions and the following disclaimer in the 17272343Sngie * documentation and/or other materials provided with the distribution. 18272343Sngie * 19272343Sngie * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20272343Sngie * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21272343Sngie * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22272343Sngie * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23272343Sngie * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24272343Sngie * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25272343Sngie * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26272343Sngie * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27272343Sngie * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28272343Sngie * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29272343Sngie * POSSIBILITY OF SUCH DAMAGE. 30272343Sngie */ 31272343Sngie#include <sys/cdefs.h> 32272343Sngie__RCSID("$NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $"); 33272343Sngie 34272343Sngie#include <atf-c.h> 35272343Sngie#include <stdio.h> 36272343Sngie#include <stdlib.h> 37272343Sngie 38272343Sngie/* 39272343Sngie * TODO: Add some general RNG tests (cf. the famous "diehard" tests?). 40272343Sngie */ 41272343Sngie 42272343SngieATF_TC(random_same); 43272343SngieATF_TC_HEAD(random_same, tc) 44272343Sngie{ 45272343Sngie atf_tc_set_md_var(tc, "descr", 46272343Sngie "Test that random(3) does not always return the same " 47272343Sngie "value when the seed is initialized to zero"); 48272343Sngie} 49272343Sngie 50272343Sngie#define MAX_ITER 10 51272343Sngie 52272343SngieATF_TC_BODY(random_same, tc) 53272343Sngie{ 54272343Sngie long buf[MAX_ITER]; 55272343Sngie size_t i, j; 56272343Sngie 57272343Sngie /* 58272343Sngie * See CVE-2012-1577. 59272343Sngie */ 60272343Sngie srandom(0); 61272343Sngie 62272343Sngie for (i = 0; i < __arraycount(buf); i++) { 63272343Sngie 64272343Sngie buf[i] = random(); 65272343Sngie 66272343Sngie for (j = 0; j < i; j++) { 67272343Sngie 68272343Sngie (void)fprintf(stderr, "i = %zu, j = %zu: " 69272343Sngie "%ld vs. %ld\n", i, j, buf[i], buf[j]); 70272343Sngie 71272343Sngie ATF_CHECK(buf[i] != buf[j]); 72272343Sngie } 73272343Sngie } 74272343Sngie} 75272343Sngie 76272343SngieATF_TP_ADD_TCS(tp) 77272343Sngie{ 78272343Sngie 79272343Sngie ATF_TP_ADD_TC(tp, random_same); 80272343Sngie 81272343Sngie return atf_no_error(); 82272343Sngie} 83