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/*
* Copyright (C) 2001 by the Massachusetts Institute of Technology.
* All rights reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* Section 6 (Encryption) of the Kerberos revisions document defines
* cipher states to be used to chain encryptions and decryptions
* together. Examples of cipher states include initialization vectors
* for CBC encription. Most Kerberos encryption systems can share
* code for initializing and freeing cipher states. This file
* contains that default code.
*/
#include "k5-int.h"
krb5_error_code krb5int_des_init_state
(const krb5_keyblock *key, krb5_keyusage usage, krb5_data *new_state )
{
new_state->length = 8;
new_state->data = (void *) malloc(8);
if (new_state->data) {
memset (new_state->data, 0, new_state->length);
/* We need to copy in the key for des-cbc-cr--ick, but that's how it works*/
if (key->enctype == ENCTYPE_DES_CBC_CRC) {
memcpy (new_state->data, key->contents, new_state->length);
}
} else {
return ENOMEM;
}
return 0;
}
krb5_error_code krb5int_default_free_state
(krb5_data *state)
{
if (state->data) {
free (state->data);
state-> data = NULL;
state->length = 0;
}
return 0;
}
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