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#endif /* NETWORKING */
52
53 read_random(node, 6);
54 node[0] |= 0x01;
55}
56
57static uint64_t
58read_time(void)
59{
60 struct timespec tv;
61
62 nanotime(&tv);
63
64 return (tv.tv_sec * 10000000ULL) + (tv.tv_nsec / 100ULL) + 0x01B21DD213814000ULL;
65}
66
67void
68uuid_clear(uuid_t uu)
69{
70 memset(uu, 0, sizeof(uuid_t));
71}
72
73int
74uuid_compare(const uuid_t uu1, const uuid_t uu2)
75{
76 return memcmp(uu1, uu2, sizeof(uuid_t));
77}
78
79void
80uuid_copy(uuid_t dst, const uuid_t src)
81{
82 memcpy(dst, src, sizeof(uuid_t));
83}
84
85static void
86uuid_random_setflags(uuid_t out)
87{
88 out[6] = (out[6] & 0x0F) | 0x40;
89 out[8] = (out[8] & 0x3F) | 0x80;
90}
91
92void
93uuid_generate_random(uuid_t out)
94{
95 read_random(out, sizeof(uuid_t));
96 uuid_random_setflags(out);
97}
98
99void
100uuid_generate_early_random(uuid_t out)
101{
102 read_frandom(out, sizeof(uuid_t));
103 uuid_random_setflags(out);
104}
105
106void
107uuid_generate_time(uuid_t out)
108{
109 uint64_t time;
110
111 read_node(&out[10]);
112 read_random(&out[8], 2);
113
114 time = read_time();
115 out[0] = (uint8_t)(time >> 24);
116 out[1] = (uint8_t)(time >> 16);
117 out[2] = (uint8_t)(time >> 8);
118 out[3] = (uint8_t)time;
119 out[4] = (uint8_t)(time >> 40);
120 out[5] = (uint8_t)(time >> 32);
121 out[6] = (uint8_t)(time >> 56);
122 out[7] = (uint8_t)(time >> 48);
123
124 out[6] = (out[6] & 0x0F) | 0x10;
125 out[8] = (out[8] & 0x3F) | 0x80;
126}
127
128void
129uuid_generate(uuid_t out)
130{
131 uuid_generate_random(out);
132}
133
134int
135uuid_is_null(const uuid_t uu)
136{
137 return !memcmp(uu, UUID_NULL, sizeof(uuid_t));
138}
139
140int
141uuid_parse(const uuid_string_t in, uuid_t uu)
142{
143 int n = 0;
144
145 sscanf(in,
146 "%2hhx%2hhx%2hhx%2hhx-"
147 "%2hhx%2hhx-"
148 "%2hhx%2hhx-"
149 "%2hhx%2hhx-"
150 "%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%n",
151 &uu[0], &uu[1], &uu[2], &uu[3],
152 &uu[4], &uu[5],
153 &uu[6], &uu[7],
154 &uu[8], &uu[9],
155 &uu[10], &uu[11], &uu[12], &uu[13], &uu[14], &uu[15], &n);
156
157 return (n != 36 || in[n] != '\0' ? -1 : 0);
158}
159
160void
161uuid_unparse_lower(const uuid_t uu, uuid_string_t out)
162{
163 snprintf(out,
164 sizeof(uuid_string_t),
165 "%02x%02x%02x%02x-"
166 "%02x%02x-"
167 "%02x%02x-"
168 "%02x%02x-"
169 "%02x%02x%02x%02x%02x%02x",
170 uu[0], uu[1], uu[2], uu[3],
171 uu[4], uu[5],
172 uu[6], uu[7],
173 uu[8], uu[9],
174 uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
175}
176
177void
178uuid_unparse_upper(const uuid_t uu, uuid_string_t out)
179{
180 snprintf(out,
181 sizeof(uuid_string_t),
182 "%02X%02X%02X%02X-"
183 "%02X%02X-"
184 "%02X%02X-"
185 "%02X%02X-"
186 "%02X%02X%02X%02X%02X%02X",
187 uu[0], uu[1], uu[2], uu[3],
188 uu[4], uu[5],
189 uu[6], uu[7],
190 uu[8], uu[9],
191 uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
192}
193
194void
195uuid_unparse(const uuid_t uu, uuid_string_t out)
196{
197 uuid_unparse_upper(uu, out);
198}
199