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/*
* $Source$
* $Author$
*
* Copyright 1985, 1986, 1987, 1988, 1990 by the Massachusetts Institute
* of Technology.
* All Rights Reserved.
*
* For copying and distribution information, please see the file
* <krb5/copyright.h>.
*
* These routines perform encryption and decryption using the DES
* private key algorithm, or else a subset of it-- fewer inner loops.
* (AUTH_DES_ITER defaults to 16, may be less.)
*
* Under U.S. law, this software may not be exported outside the US
* without license from the U.S. Commerce department.
*
* These routines form the library interface to the DES facilities.
*
* spm 8/85 MIT project athena
*/
#if !defined(lint) && !defined(SABER)
static char rcsid_cksum_c[] =
"$Id$";
#endif /* !lint & !SABER */
#include "des.h"
#include <krb5/ext-proto.h>
/*
* This routine performs DES cipher-block-chaining checksum operation,
* a.k.a. Message Authentication Code. It ALWAYS encrypts from input
* to a single 64 bit output MAC checksum.
*
* 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 8 bytes long. If not enough space was
* provided, your program will get trashed.
*
* The input is null padded, at the end (highest addr), to an integral
* multiple of eight bytes.
*/
void
des_cbc_cksum(in,out,length,key,iv)
krb5_octet *in; /* >= length bytes of inputtext */
krb5_octet *out; /* >= length bytes of outputtext */
register long length; /* in bytes */
mit_des_key_schedule key; /* precomputed key schedule */
krb5_octet *iv; /* 8 bytes of ivec */
{
mit_des_cbc_cksum(in, out, length, key, iv);
}
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