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/*
* lib/crypto/openssldes/f_cbc.c
*
* Copyright (C) 1990 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.
*
* DES implementation donated by Dennis Ferguson
*/
/*
* des_cbc_encrypt.c - an implementation of the DES cipher function in cbc mode
*/
#include "des_int.h"
/*
* des_cbc_encrypt - {en,de}crypt a stream in CBC mode
*/
/*
* This routine performs DES cipher-block-chaining operation, either
* encrypting from cleartext to ciphertext, if encrypt != 0 or
* decrypting from ciphertext to cleartext, if encrypt == 0.
*
* The key schedule is passed as an arg, as well as the cleartext or
* ciphertext. The cleartext and ciphertext should be in host order.
*
* NOTE-- the output is ALWAYS an multiple of 8 bytes long. If not
* enough space was provided, your program will get trashed.
*
* For encryption, the cleartext string is null padded, at the end, to
* an integral multiple of eight bytes.
*
* For decryption, the ciphertext will be used in integral multiples
* of 8 bytes, but only the first "length" bytes returned into the
* cleartext.
*/
const mit_des_cblock mit_des_zeroblock /* = all zero */;
#undef mit_des_cbc_encrypt
int
mit_des_cbc_encrypt(const mit_des_cblock *in, mit_des_cblock *out,
unsigned long length, const mit_des_key_schedule schedule,
const mit_des_cblock ivec, int enc)
{
/* Unsupported operation */
return KRB5_CRYPTO_INTERNAL;
}
void
krb5int_des_cbc_encrypt(const mit_des_cblock *in,
mit_des_cblock *out,
unsigned long length,
const mit_des_key_schedule schedule,
const mit_des_cblock ivec)
{
/* Unsupported operation */
abort();
}
void
krb5int_des_cbc_decrypt(const mit_des_cblock *in,
mit_des_cblock *out,
unsigned long length,
const mit_des_key_schedule schedule,
const mit_des_cblock ivec)
{
/* Unsupported operation */
abort();
}
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