1 /* $OpenBSD: uuid_create.c,v 1.1 2014/08/31 09:36:39 miod Exp $ */ 2 /* $NetBSD: uuid_create.c,v 1.1 2004/09/13 21:44:54 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 2002 Marcel Moolenaar 6 * Copyright (c) 2002 Hiten Mahesh Pandya 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD: src/lib/libc/uuid/uuid_create.c,v 1.2 2003/08/08 19:18:43 marcel Exp $ 31 */ 32 33 #include "namespace.h" 34 35 #include <stdlib.h> 36 #include <uuid.h> 37 38 /* 39 * uuid_create() - create an UUID. 40 * See also: 41 * http://www.opengroup.org/onlinepubs/009629399/uuid_create.htm and 42 * RFC 4122 43 * 44 * Create a UUID from random number as defined in section 4.4 of RFC 4122 45 */ 46 void 47 uuid_create(uuid_t *u, uint32_t *status) 48 { 49 arc4random_buf(u, sizeof(uuid_t)); 50 51 u->clock_seq_hi_and_reserved &= ~(1 << 6); 52 u->clock_seq_hi_and_reserved |= (1 << 7); 53 54 u->time_hi_and_version &= ~(1 << 12); 55 u->time_hi_and_version &= ~(1 << 13); 56 u->time_hi_and_version |= (1 << 14); 57 u->time_hi_and_version &= ~(1 << 15); 58 59 if (status) 60 *status = uuid_s_ok; 61 } 62