From ca3efbcfa52175f6883523a4782ce280dd592054 Mon Sep 17 00:00:00 2001 From: matthew <> Date: Fri, 24 Sep 2010 13:33:00 +0000 Subject: Add timingsafe_bcmp(3) to libc, mention that it's already in the kernel in kern(9), and remove it from OpenSSH. ok deraadt@, djm@ --- src/lib/libc/string/timingsafe_bcmp.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/lib/libc/string/timingsafe_bcmp.c (limited to 'src/lib/libc/string/timingsafe_bcmp.c') diff --git a/src/lib/libc/string/timingsafe_bcmp.c b/src/lib/libc/string/timingsafe_bcmp.c new file mode 100644 index 0000000000..9c4287cf63 --- /dev/null +++ b/src/lib/libc/string/timingsafe_bcmp.c @@ -0,0 +1,33 @@ +/* $OpenBSD: timingsafe_bcmp.c,v 1.1 2010/09/24 13:33:00 matthew Exp $ */ +/* + * Copyright (c) 2010 Damien Miller. All rights reserved. + * + * Permission to use, copy, modify, and 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 THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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. + */ + +#if !defined(_KERNEL) && !defined(_STANDALONE) +#include +#else +#include +#endif + +int +timingsafe_bcmp(const void *b1, const void *b2, size_t n) +{ + const unsigned char *p1 = b1, *p2 = b2; + int ret = 0; + + for (; n > 0; n--) + ret |= *p1++ ^ *p2++; + return (ret != 0); +} -- cgit v1.2.3-55-g6feb