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/*
* lib/crypto/krb/prf//des_prf.c
*
* Copyright (C) 2004, 2009 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.
*
*
*
* This file contains an implementation of the RFC 3961 PRF for
* des-cbc-crc, des-cbc-md4, and des-cbc-md5 enctypes.
*/
#include "prf_int.h"
//#include <hash_provider/hash_provider.h> /* XXX is this ok? */
krb5_error_code
krb5int_des_prf (const struct krb5_enc_provider *enc,
const struct krb5_hash_provider *hash,
krb5_key key, const krb5_data *in, krb5_data *out)
{
krb5_data tmp;
krb5_error_code ret = 0;
hash = &krb5int_hash_md5; /* MD5 is always used. */
tmp.length = hash->hashsize;
tmp.data = malloc(hash->hashsize);
if (tmp.data == NULL)
return ENOMEM;
ret = hash->hash(1, in, &tmp);
if (ret == 0)
ret = enc->encrypt(key, NULL, &tmp, out);
free(tmp.data);
return ret;
}
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