From 4bb261b015d382a567563571ae4d399a16caebe2 Mon Sep 17 00:00:00 2001 From: "C. McEnroe" Date: Mon, 27 Jul 2020 21:55:29 -0400 Subject: Import LibreSSL 3.2.0 --- compat/getentropy_netbsd.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 compat/getentropy_netbsd.c (limited to 'compat/getentropy_netbsd.c') diff --git a/compat/getentropy_netbsd.c b/compat/getentropy_netbsd.c new file mode 100644 index 0000000..45d68c9 --- /dev/null +++ b/compat/getentropy_netbsd.c @@ -0,0 +1,64 @@ +/* $OpenBSD: getentropy_netbsd.c,v 1.3 2016/08/07 03:27:21 tb Exp $ */ + +/* + * Copyright (c) 2014 Pawel Jakub Dawidek + * Copyright (c) 2014 Brent Cook + * + * 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. + * + * Emulation of getentropy(2) as documented at: + * http://man.openbsd.org/getentropy.2 + */ + +#include +#include + +#include +#include + +/* + * Derived from lib/libc/gen/arc4random.c from FreeBSD. + */ +static size_t +getentropy_sysctl(u_char *buf, size_t size) +{ + int mib[2]; + size_t len, done; + + mib[0] = CTL_KERN; + mib[1] = KERN_ARND; + done = 0; + + do { + len = size; + if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) + return (done); + done += len; + buf += len; + size -= len; + } while (size > 0); + + return (done); +} + +int +getentropy(void *buf, size_t len) +{ + if (len <= 256 && + getentropy_sysctl(buf, len) == len) { + return (0); + } + + errno = EIO; + return (-1); +} -- cgit 1.4.1