1/*-
2 * Copyright (c) 2016 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28#include <stdint.h>
29#include <string.h>
30
31#include "endian.h"
32#include "image.h"
33#include "mkimg.h"
34
35static void osdep_uuidgen(mkimg_uuid_t *);
36
37#ifdef __APPLE__
38#include <uuid/uuid.h>
39
40static void
41osdep_uuidgen(mkimg_uuid_t *uuid)
42{
43
44	uuid_generate_time((void *)uuid);
45}
46#endif	/* __APPLE__ */
47
48#ifdef __FreeBSD__
49#include <sys/uuid.h>
50
51static void
52osdep_uuidgen(mkimg_uuid_t *uuid)
53{
54
55	uuidgen((void *)uuid, 1);
56}
57#endif	/* __FreeBSD__ */
58
59#ifdef __linux__
60#include <stdlib.h>
61#include <time.h>
62
63static void
64osdep_uuidgen(mkimg_uuid_t *uuid)
65{
66	struct timeval tv;
67	uint64_t time = 0x01B21DD213814000LL;
68	u_int i;
69	uint16_t seq;
70
71	if (gettimeofday(&tv, NULL) == -1)
72		abort();
73
74	time += (uint64_t)tv.tv_sec * 10000000LL;
75	time += tv.tv_usec * 10;
76
77	uuid->time_low = (uint32_t)time;
78	uuid->time_mid = (uint16_t)(time >> 32);
79	uuid->time_hi_and_version = (uint16_t)(time >> 48) & 0xfff;
80	uuid->time_hi_and_version |= 1 << 12;
81
82	seq = random();
83
84	uuid->clock_seq_hi_and_reserved = (uint8_t)(seq >> 8) & 0x3f;
85	uuid->clock_seq_low = (uint8_t)seq;
86
87	for (i = 0; i < 6; i++)
88		uuid->node[i] = (uint8_t)random();
89	uuid->node[0] |= 0x01;
90}
91#endif	/* __linux__ */
92
93void
94mkimg_uuid(mkimg_uuid_t *uuid)
95{
96	static uint8_t gen[sizeof(mkimg_uuid_t)];
97	u_int i;
98
99	if (!unit_testing) {
100		osdep_uuidgen(uuid);
101		return;
102	}
103
104	for (i = 0; i < sizeof(gen); i++)
105		gen[i]++;
106	memcpy(uuid, gen, sizeof(*uuid));
107}
108
109void
110mkimg_uuid_enc(void *buf, const mkimg_uuid_t *uuid)
111{
112	uint8_t *p = buf;
113	u_int i;
114
115	le32enc(p, uuid->time_low);
116	le16enc(p + 4, uuid->time_mid);
117	le16enc(p + 6, uuid->time_hi_and_version);
118	p[8] = uuid->clock_seq_hi_and_reserved;
119	p[9] = uuid->clock_seq_low;
120	for (i = 0; i < 6; i++)
121		p[10 + i] = uuid->node[i];
122}
123