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/*
* lib/crypto/raw-des.c
*
* Copyright 1994, 1995 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. 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.
*/
#include "k5-int.h"
#include "des_int.h"
krb5_error_code mit_raw_des_encrypt_func
PROTOTYPE(( krb5_const_pointer, krb5_pointer, const size_t,
krb5_encrypt_block *, krb5_pointer ));
krb5_error_code mit_raw_des_decrypt_func
PROTOTYPE(( krb5_const_pointer, krb5_pointer, const size_t,
krb5_encrypt_block *, krb5_pointer ));
static krb5_cryptosystem_entry mit_raw_des_cryptosystem_entry = {
0,
mit_raw_des_encrypt_func,
mit_raw_des_decrypt_func,
mit_des_process_key,
mit_des_finish_key,
mit_des_string_to_key,
mit_des_init_random_key,
mit_des_finish_random_key,
mit_des_random_key,
sizeof(mit_des_cblock),
0,
sizeof(mit_des_cblock),
ENCTYPE_DES_CBC_RAW
};
krb5_cs_table_entry krb5_raw_des_cst_entry = {
0,
&mit_raw_des_cryptosystem_entry,
0
};
krb5_error_code
mit_raw_des_decrypt_func(in, out, size, key, ivec)
krb5_const_pointer in;
krb5_pointer out;
const size_t size;
krb5_encrypt_block * key;
krb5_pointer ivec;
{
return (mit_des_cbc_encrypt ((const mit_des_cblock *) in,
out,
size,
(struct mit_des_ks_struct *)key->priv,
ivec ? ivec : (krb5_pointer)key->key->contents,
MIT_DES_DECRYPT));
}
krb5_error_code
mit_raw_des_encrypt_func(in, out, size, key, ivec)
krb5_const_pointer in;
krb5_pointer out;
const size_t size;
krb5_encrypt_block * key;
krb5_pointer ivec;
{
int sumsize;
/* round up to des block size */
sumsize = krb5_roundup(size, sizeof(mit_des_cblock));
/* assemble crypto input into the output area, then encrypt in place. */
memset((char *)out, 0, sumsize);
memcpy((char *)out, (char *)in, size);
/* We depend here on the ability of this DES implementation to
encrypt plaintext to ciphertext in-place. */
return (mit_des_cbc_encrypt (out,
out,
sumsize,
(struct mit_des_ks_struct *)key->priv,
ivec ? ivec : (krb5_pointer)key->key->contents,
MIT_DES_ENCRYPT));
}
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