uuid.c revision 8d520ff1dc2da35cdca849e982051b86468016d8 
1/*
2 * Universally Unique IDentifier (UUID)
3 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#include "includes.h"
16
17#include "common.h"
18#include "uuid.h"
19
20int uuid_str2bin(const char *str, u8 *bin)
21{
22	const char *pos;
23	u8 *opos;
24
25	pos = str;
26	opos = bin;
27
28	if (hexstr2bin(pos, opos, 4))
29		return -1;
30	pos += 8;
31	opos += 4;
32
33	if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
34		return -1;
35	pos += 4;
36	opos += 2;
37
38	if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
39		return -1;
40	pos += 4;
41	opos += 2;
42
43	if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
44		return -1;
45	pos += 4;
46	opos += 2;
47
48	if (*pos++ != '-' || hexstr2bin(pos, opos, 6))
49		return -1;
50
51	return 0;
52}
53
54
55int uuid_bin2str(const u8 *bin, char *str, size_t max_len)
56{
57	int len;
58	len = os_snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
59			  "%02x%02x-%02x%02x%02x%02x%02x%02x",
60			  bin[0], bin[1], bin[2], bin[3],
61			  bin[4], bin[5], bin[6], bin[7],
62			  bin[8], bin[9], bin[10], bin[11],
63			  bin[12], bin[13], bin[14], bin[15]);
64	if (len < 0 || (size_t) len >= max_len)
65		return -1;
66	return 0;
67}
68
69
70int is_nil_uuid(const u8 *uuid)
71{
72	int i;
73	for (i = 0; i < UUID_LEN; i++)
74		if (uuid[i])
75			return 0;
76	return 1;
77}
78