/*
 * Copyright (C) 1998 by the FundsXpress, INC.
 * 
 * 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 FundsXpress. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  FundsXpress makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "k5-int.h"

void krb5_dk_encrypt_length
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		size_t input, size_t *length);

krb5_error_code krb5_dk_encrypt
(
		krb5_context context,
		const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec,
		const krb5_data *input, krb5_data *output);

extern krb5_error_code krb5_dk_decrypt
(krb5_context context,
	krb5_const struct krb5_enc_provider *enc,
	krb5_const struct krb5_hash_provider *hash,
	krb5_const krb5_keyblock *key, krb5_keyusage usage,
	krb5_const krb5_data *ivec, krb5_const krb5_data *input,
	krb5_data *arg_output);

extern krb5_error_code krb5_derive_key
(krb5_context context,
	krb5_const struct krb5_enc_provider *enc,
	krb5_const krb5_keyblock *inkey,
	krb5_keyblock *outkey, krb5_const krb5_data *in_constant);

extern krb5_error_code krb5_dk_make_checksum
(krb5_context context,
	krb5_const struct krb5_hash_provider *hash,
	krb5_const krb5_keyblock *key, krb5_keyusage usage,
	krb5_const krb5_data *input, krb5_data *output);


#ifndef _KERNEL
extern krb5_error_code krb5int_dk_string_to_key
(krb5_context context,
	krb5_const struct krb5_enc_provider *enc, 
	krb5_const krb5_data *string,
	krb5_const krb5_data *salt,
	krb5_const krb5_data *params,
	krb5_keyblock *key);
#endif

void krb5int_aes_encrypt_length
(const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		size_t input, size_t *length);

krb5_error_code krb5int_aes_dk_encrypt
(		krb5_context context,
		const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec,
		const krb5_data *input, krb5_data *output);

krb5_error_code krb5int_aes_dk_decrypt
(		krb5_context context,
		const struct krb5_enc_provider *enc,
		const struct krb5_hash_provider *hash,
		const krb5_keyblock *key, krb5_keyusage usage,
		const krb5_data *ivec, const krb5_data *input,
		krb5_data *arg_output);

extern krb5_error_code
krb5int_aes_string_to_key (krb5_context context,
			const struct krb5_enc_provider *,
                           const krb5_data *, const krb5_data *,
                           const krb5_data *, krb5_keyblock *key);