83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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/* $NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $ */
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jukka Ruohonen.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $");
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#include <atf-c.h>
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#include <stdio.h>
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#include <stdlib.h>
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/*
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* TODO: Add some general RNG tests (cf. the famous "diehard" tests?).
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*/
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ATF_TC(random_same);
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ATF_TC_HEAD(random_same, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"Test that random(3) does not always return the same "
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"value when the seed is initialized to zero");
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}
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#define MAX_ITER 10
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ATF_TC_BODY(random_same, tc)
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{
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long buf[MAX_ITER];
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size_t i, j;
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/*
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* See CVE-2012-1577.
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*/
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srandom(0);
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for (i = 0; i < __arraycount(buf); i++) {
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buf[i] = random();
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for (j = 0; j < i; j++) {
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(void)fprintf(stderr, "i = %zu, j = %zu: "
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"%ld vs. %ld\n", i, j, buf[i], buf[j]);
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ATF_CHECK(buf[i] != buf[j]);
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}
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}
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, random_same);
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return atf_no_error();
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}
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