1/*
2 * Copyright (c) 2004-2011 Apple Inc. All rights reserved.
3 *
4 * %Begin-Header%
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, and the entire permission notice in its entirety,
10 * including the disclaimer of warranties.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote
15 * products derived from this software without specific prior
16 * written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
21 * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
24 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
25 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
28 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
29 * DAMAGE.
30 * %End-Header%
31 */
32
33#include <uuid/uuid.h>
34
35#include <stdint.h>
36#include <string.h>
37
38#include <sys/random.h>
39#include <sys/socket.h>
40#include <sys/systm.h>
41#include <sys/time.h>
42
43extern int uuid_get_ethernet(u_int8_t *);
44
45static void
46read_node(uint8_t *node)
47{
48#if NETWORKING
49 if (uuid_get_ethernet(node) == 0) {
50 return;
51 }
52#endif /* NETWORKING */
53
54 read_random(buffer: node, numBytes: 6);
55 node[0] |= 0x01;
56}
57
58static uint64_t
59read_time(void)
60{
61 struct timespec tv;
62
63 nanotime(ts: &tv);
64
65 return (tv.tv_sec * 10000000ULL) + (tv.tv_nsec / 100ULL) + 0x01B21DD213814000ULL;
66}
67
68void
69uuid_clear(uuid_t uu)
70{
71 memset(s: uu, c: 0, n: sizeof(uuid_t));
72}
73
74int
75uuid_compare(const uuid_t uu1, const uuid_t uu2)
76{
77 return memcmp(s1: uu1, s2: uu2, n: sizeof(uuid_t));
78}
79
80void
81uuid_copy(uuid_t dst, const uuid_t src)
82{
83 memcpy(dst, src, n: sizeof(uuid_t));
84}
85
86static void
87uuid_random_setflags(uuid_t out)
88{
89 out[6] = (out[6] & 0x0F) | 0x40;
90 out[8] = (out[8] & 0x3F) | 0x80;
91}
92
93void
94uuid_generate_random(uuid_t out)
95{
96 read_random(buffer: out, numBytes: sizeof(uuid_t));
97 uuid_random_setflags(out);
98}
99
100void
101uuid_generate_early_random(uuid_t out)
102{
103 read_frandom(buffer: out, numBytes: sizeof(uuid_t));
104 uuid_random_setflags(out);
105}
106
107void
108uuid_generate_time(uuid_t out)
109{
110 uint64_t time;
111
112 read_node(node: &out[10]);
113 read_random(buffer: &out[8], numBytes: 2);
114
115 time = read_time();
116 out[0] = (uint8_t)(time >> 24);
117 out[1] = (uint8_t)(time >> 16);
118 out[2] = (uint8_t)(time >> 8);
119 out[3] = (uint8_t)time;
120 out[4] = (uint8_t)(time >> 40);
121 out[5] = (uint8_t)(time >> 32);
122 out[6] = (uint8_t)(time >> 56);
123 out[7] = (uint8_t)(time >> 48);
124
125 out[6] = (out[6] & 0x0F) | 0x10;
126 out[8] = (out[8] & 0x3F) | 0x80;
127}
128
129void
130uuid_generate(uuid_t out)
131{
132 uuid_generate_random(out);
133}
134
135int
136uuid_is_null(const uuid_t uu)
137{
138 return !memcmp(s1: uu, s2: UUID_NULL, n: sizeof(uuid_t));
139}
140
141int
142uuid_parse(const uuid_string_t in, uuid_t uu)
143{
144 int n = 0;
145
146 sscanf(in,
147 "%2hhx%2hhx%2hhx%2hhx-"
148 "%2hhx%2hhx-"
149 "%2hhx%2hhx-"
150 "%2hhx%2hhx-"
151 "%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%n",
152 &uu[0], &uu[1], &uu[2], &uu[3],
153 &uu[4], &uu[5],
154 &uu[6], &uu[7],
155 &uu[8], &uu[9],
156 &uu[10], &uu[11], &uu[12], &uu[13], &uu[14], &uu[15], &n);
157
158 return n != 36 || in[n] != '\0' ? -1 : 0;
159}
160
161void
162uuid_unparse_lower(const uuid_t uu, uuid_string_t out)
163{
164 snprintf(out,
165 count: sizeof(uuid_string_t),
166 "%02x%02x%02x%02x-"
167 "%02x%02x-"
168 "%02x%02x-"
169 "%02x%02x-"
170 "%02x%02x%02x%02x%02x%02x",
171 uu[0], uu[1], uu[2], uu[3],
172 uu[4], uu[5],
173 uu[6], uu[7],
174 uu[8], uu[9],
175 uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
176}
177
178void
179uuid_unparse_upper(const uuid_t uu, uuid_string_t out)
180{
181 snprintf(out,
182 count: sizeof(uuid_string_t),
183 "%02X%02X%02X%02X-"
184 "%02X%02X-"
185 "%02X%02X-"
186 "%02X%02X-"
187 "%02X%02X%02X%02X%02X%02X",
188 uu[0], uu[1], uu[2], uu[3],
189 uu[4], uu[5],
190 uu[6], uu[7],
191 uu[8], uu[9],
192 uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
193}
194
195void
196uuid_unparse(const uuid_t uu, uuid_string_t out)
197{
198 uuid_unparse_upper(uu, out);
199}
200