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[master] added isc_safe_memcmp()

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3611.	[bug]		Improved resistance to a theoretical authentication
			attack based on differential timing.  [RT #33939]
This commit is contained in:
Evan Hunt
2013-07-09 11:47:16 -07:00
parent 892506b681
commit 5b7abbef51
16 changed files with 233 additions and 20 deletions
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52
lib/isc/tests/safe_test.c Normal file
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/*
* Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id$ */
/* ! \file */
#include <config.h>
#include <atf-c.h>
#include <stdio.h>
#include <string.h>
#include <isc/safe.h>
#include <isc/util.h>
ATF_TC(isc_safe_memcmp);
ATF_TC_HEAD(isc_safe_memcmp, tc) {
atf_tc_set_md_var(tc, "descr", "safe memcmp()");
}
ATF_TC_BODY(isc_safe_memcmp, tc) {
UNUSED(tc);
ATF_CHECK(isc_safe_memcmp("test", "test", 4));
ATF_CHECK(!isc_safe_memcmp("test", "tesc", 4));
ATF_CHECK(isc_safe_memcmp("\x00\x00\x00\x00", "\x00\x00\x00\x00", 4));
ATF_CHECK(!isc_safe_memcmp("\x00\x00\x00\x00", "\x00\x00\x00\x01", 4));
ATF_CHECK(!isc_safe_memcmp("\x00\x00\x00\x02", "\x00\x00\x00\x00", 4));
}
/*
* Main
*/
ATF_TP_ADD_TCS(tp) {
ATF_TP_ADD_TC(tp, isc_safe_memcmp);
return (atf_no_error());
}