1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* lib/crypto/krb/state.c */
3 /*
4 * Copyright (C) 2001 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
25 *
26 *
27 *
28 * * Section 6 (Encryption) of the Kerberos revisions document defines
29 * cipher states to be used to chain encryptions and decryptions
30 * together. Examples of cipher states include initialization vectors
31 * for CBC encription. This file contains implementations of
32 * krb5_c_init_state and krb5_c_free_state used by clients of the
33 * Kerberos crypto library.
34 */
35 #include "crypto_int.h"
36
37 krb5_error_code KRB5_CALLCONV
krb5_c_init_state(krb5_context context,const krb5_keyblock * key,krb5_keyusage keyusage,krb5_data * new_state)38 krb5_c_init_state (krb5_context context, const krb5_keyblock *key,
39 krb5_keyusage keyusage, krb5_data *new_state)
40 {
41 const struct krb5_keytypes *ktp;
42
43 ktp = find_enctype(key->enctype);
44 if (ktp == NULL)
45 return KRB5_BAD_ENCTYPE;
46 return ktp->enc->init_state(key, keyusage, new_state);
47 }
48
49 krb5_error_code KRB5_CALLCONV
krb5_c_free_state(krb5_context context,const krb5_keyblock * key,krb5_data * state)50 krb5_c_free_state(krb5_context context, const krb5_keyblock *key,
51 krb5_data *state)
52 {
53 const struct krb5_keytypes *ktp;
54
55 ktp = find_enctype(key->enctype);
56 if (ktp == NULL)
57 return KRB5_BAD_ENCTYPE;
58 ktp->enc->free_state(state);
59 return 0;
60 }
61