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__FBSDID("$FreeBSD$");
29
30#include <stdint.h>
31#include <string.h>
32
33#include "endian.h"
34#include "image.h"
35#include "mkimg.h"
36
37static void osdep_uuidgen(mkimg_uuid_t *);
38
39#ifdef __APPLE__
40#include <uuid/uuid.h>
41
42static void
43osdep_uuidgen(mkimg_uuid_t *uuid)
44{
45
46	uuid_generate_time((void *)uuid);
47}
48#endif	/* __APPLE__ */
49
50#ifdef __FreeBSD__
51#include <sys/uuid.h>
52
53static void
54osdep_uuidgen(mkimg_uuid_t *uuid)
55{
56
57	uuidgen((void *)uuid, 1);
58}
59#endif	/* __FreeBSD__ */
60
61#ifdef __linux__
62#include <stdlib.h>
63#include <time.h>
64
65static void
66osdep_uuidgen(mkimg_uuid_t *uuid)
67{
68	struct timeval tv;
69	uint64_t time = 0x01B21DD213814000LL;
70	u_int i;
71	uint16_t seq;
72
73	if (gettimeofday(&tv, NULL) == -1)
74		abort();
75
76	time += (uint64_t)tv.tv_sec * 10000000LL;
77	time += tv.tv_usec * 10;
78
79	uuid->time_low = (uint32_t)time;
80	uuid->time_mid = (uint16_t)(time >> 32);
81	uuid->time_hi_and_version = (uint16_t)(time >> 48) & 0xfff;
82	uuid->time_hi_and_version |= 1 << 12;
83
84	seq = random();
85
86	uuid->clock_seq_hi_and_reserved = (uint8_t)(seq >> 8) & 0x3f;
87	uuid->clock_seq_low = (uint8_t)seq;
88
89	for (i = 0; i < 6; i++)
90		uuid->node[i] = (uint8_t)random();
91	uuid->node[0] |= 0x01;
92}
93#endif	/* __linux__ */
94
95void
96mkimg_uuid(mkimg_uuid_t *uuid)
97{
98	static uint8_t gen[sizeof(mkimg_uuid_t)];
99	u_int i;
100
101	if (!unit_testing) {
102		osdep_uuidgen(uuid);
103		return;
104	}
105
106	for (i = 0; i < sizeof(gen); i++)
107		gen[i]++;
108	memcpy(uuid, gen, sizeof(*uuid));
109}
110
111void
112mkimg_uuid_enc(void *buf, const mkimg_uuid_t *uuid)
113{
114	uint8_t *p = buf;
115	u_int i;
116
117	le32enc(p, uuid->time_low);
118	le16enc(p + 4, uuid->time_mid);
119	le16enc(p + 6, uuid->time_hi_and_version);
120	p[8] = uuid->clock_seq_hi_and_reserved;
121	p[9] = uuid->clock_seq_low;
122	for (i = 0; i < 6; i++)
123		p[10 + i] = uuid->node[i];
124}
125