1/* $OpenBSD: duid.c,v 1.2 2012/07/09 14:26:40 nicm Exp $ */
2
3/*
4 * Copyright (c) 2010 Joel Sing <jsing@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <string.h>
20
21#include "util.h"
22
23int
24isduid(const char *duid, int dflags)
25{
26	char c;
27	int i;
28
29	/* Basic format check. */
30	if (!((strlen(duid) == 16 && (dflags & OPENDEV_PART)) ||
31	    (strlen(duid) == 18 && duid[16] == '.')))
32		return 0;
33
34	/* Check UID. */
35	for (i = 0; i < 16; i++) {
36		c = duid[i];
37		if ((c < '0' || c > '9') && (c < 'a' || c > 'f'))
38			return 0;
39	}
40
41	return 1;
42}
43