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/* $OpenBSD: uuid_create.c,v 1.2 2015/09/10 18:13:46 guenther Exp $ */
/* $NetBSD: uuid_create.c,v 1.1 2004/09/13 21:44:54 thorpej Exp $ */
/*
* Copyright (c) 2002 Marcel Moolenaar
* Copyright (c) 2002 Hiten Mahesh Pandya
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/lib/libc/uuid/uuid_create.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
*/
#include <stdlib.h>
#include <uuid.h>
/*
* uuid_create() - create an UUID.
* See also:
* http://www.opengroup.org/onlinepubs/009629399/uuid_create.htm and
* RFC 4122
*
* Create a UUID from random number as defined in section 4.4 of RFC 4122
*/
void
uuid_create(uuid_t *u, uint32_t *status)
{
arc4random_buf(u, sizeof(uuid_t));
u->clock_seq_hi_and_reserved &= ~(1 << 6);
u->clock_seq_hi_and_reserved |= (1 << 7);
u->time_hi_and_version &= ~(1 << 12);
u->time_hi_and_version &= ~(1 << 13);
u->time_hi_and_version |= (1 << 14);
u->time_hi_and_version &= ~(1 << 15);
if (status)
*status = uuid_s_ok;
}
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