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/*
* lib/crypto/des/cbc_cksum.c
*
* Copyright 1985, 1986, 1987, 1988, 1990 by the Massachusetts Institute
* of Technology.
* All Rights Reserved.
*
* 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.
*
* 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"
/*
produces cbc cheksum of sequence "in" of the length "in_length"
with the help of key "key" of size "key_size" (which should be 8);
fills out krb5_checksum structure.
caller is responsible for freeing "contents" element in
krb5_checksum structure.
returns: errors
*/
krb5_error_code
mit_des_cbc_checksum(in, in_length, key, key_size, cksum)
krb5_pointer in;
size_t in_length;
krb5_pointer key;
size_t key_size;
krb5_checksum FAR * cksum;
{
struct mit_des_ks_struct *schedule; /* pointer to key schedules */
krb5_octet *contents;
if (key_size != sizeof(mit_des_cblock))
return KRB5_BAD_KEYSIZE;
if (!(schedule = (struct mit_des_ks_struct *) malloc(sizeof(mit_des_key_schedule))))
return ENOMEM;
#define cleanup() { memset((char *)schedule, 0, sizeof(mit_des_key_schedule));\
free( (char *) schedule); }
switch (mit_des_key_sched ((krb5_octet *)key, schedule)) {
case -1:
cleanup();
return KRB5DES_BAD_KEYPAR;
case -2:
cleanup();
return KRB5DES_WEAK_KEY;
default:
;
}
if (!(contents = (krb5_octet *) malloc(sizeof(mit_des_cblock)))) {
cleanup();
return ENOMEM;
}
mit_des_cbc_cksum((krb5_octet *)in, contents, in_length,
schedule, (krb5_octet *)key);
cksum->checksum_type = CKSUMTYPE_DESCBC;
cksum->length = sizeof(mit_des_cblock);
cksum->contents = contents;
cleanup();
return 0;
}
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