1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /*
3 * Copyright (C) 2001, 2014 by the Massachusetts Institute of Technology.
4 * All rights reserved.
5 *
6 * Export of this software from the United States of America may
7 * require a specific license from the United States Government.
8 * It is the responsibility of any person or organization contemplating
9 * export to obtain such a license before exporting.
10 *
11 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
12 * distribute this software and its documentation for any purpose and
13 * without fee is hereby granted, provided that the above copyright
14 * notice appear in all copies and that both that copyright notice and
15 * this permission notice appear in supporting documentation, and that
16 * the name of M.I.T. not be used in advertising or publicity pertaining
17 * to distribution of the software without specific, written prior
18 * permission. Furthermore if you modify this software you must label
19 * your software as modified software and not distribute it in such a
20 * fashion that it might be confused with the original M.I.T. software.
21 * M.I.T. makes no representations about the suitability of
22 * this software for any purpose. It is provided "as is" without express
23 * or implied warranty.
24 *
25 * Section 6 (Encryption) of the Kerberos revisions document defines
26 * cipher states to be used to chain encryptions and decryptions
27 * together. Examples of cipher states include initialization vectors
28 * for CBC encription. Most Kerberos encryption systems can share
29 * code for initializing and freeing cipher states. This file
30 * contains that default code.
31 */
32
33 #include "crypto_int.h"
34
35 krb5_error_code
krb5int_des_init_state(const krb5_keyblock * key,krb5_keyusage usage,krb5_data * state_out)36 krb5int_des_init_state(const krb5_keyblock *key, krb5_keyusage usage,
37 krb5_data *state_out)
38 {
39 if (alloc_data(state_out, 8))
40 return ENOMEM;
41
42 return 0;
43 }
44
45 void
krb5int_default_free_state(krb5_data * state)46 krb5int_default_free_state(krb5_data *state)
47 {
48 free(state->data);
49 *state = empty_data();
50 }
51