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
23 int
isduid(const char * duid,int dflags)24 isduid(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