1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/krb5/krb/etype_list.c */
3 /*
4 * Copyright (C) 2010 by the Massachusetts Institute of Technology.
5 * All rights reserved.
6 *
7 * Export of this software from the United States of America may
8 * require a specific license from the United States Government.
9 * It is the responsibility of any person or organization contemplating
10 * export to obtain such a license before exporting.
11 *
12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13 * distribute this software and its documentation for any purpose and
14 * without fee is hereby granted, provided that the above copyright
15 * notice appear in all copies and that both that copyright notice and
16 * this permission notice appear in supporting documentation, and that
17 * the name of M.I.T. not be used in advertising or publicity pertaining
18 * to distribution of the software without specific, written prior
19 * permission. Furthermore if you modify this software you must label
20 * your software as modified software and not distribute it in such a
21 * fashion that it might be confused with the original M.I.T. software.
22 * M.I.T. makes no representations about the suitability of
23 * this software for any purpose. It is provided "as is" without express
24 * or implied warranty.
25 */
26
27 /*
28 *
29 * Helper functions related to zero-terminated lists of enctypes.
30 */
31
32 #include "k5-int.h"
33 #include "int-proto.h"
34
35 size_t
k5_count_etypes(const krb5_enctype * list)36 k5_count_etypes(const krb5_enctype *list)
37 {
38 size_t count;
39
40 for (count = 0; list[count]; count++);
41 return count;
42 }
43
44 /* Copy the zero-terminated enctype list old_list into *new_list. */
45 krb5_error_code
k5_copy_etypes(const krb5_enctype * old_list,krb5_enctype ** new_list)46 k5_copy_etypes(const krb5_enctype *old_list, krb5_enctype **new_list)
47 {
48 size_t count;
49 krb5_enctype *list;
50
51 *new_list = NULL;
52 if (old_list == NULL)
53 return 0;
54 count = k5_count_etypes(old_list);
55 list = malloc(sizeof(krb5_enctype) * (count + 1));
56 if (list == NULL)
57 return ENOMEM;
58 memcpy(list, old_list, sizeof(krb5_enctype) * (count + 1));
59 *new_list = list;
60 return 0;
61 }
62
63 krb5_boolean
k5_etypes_contains(const krb5_enctype * list,krb5_enctype etype)64 k5_etypes_contains(const krb5_enctype *list, krb5_enctype etype)
65 {
66 size_t i;
67
68 for (i = 0; list[i] && list[i] != etype; i++);
69 return (list[i] == etype);
70 }
71