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/*
* lib/crypto/des/process_ky.c
*
* Copyright 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. 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 <krb5/krb5.h>
#include <krb5/ext-proto.h>
#include "des_int.h"
/*
does any necessary key preprocessing (such as computing key
schedules for DES).
eblock->crypto_entry must be set by the caller; the other elements
of eblock are to be assigned by this function.
[in particular, eblock->key must be set by this function if the key
is needed in raw form by the encryption routine]
The caller may not move or reallocate "keyblock" before calling
finish_key on "eblock"
returns: errors
*/
krb5_error_code mit_des_process_key (DECLARG(krb5_encrypt_block *, eblock),
DECLARG(const krb5_keyblock *,keyblock))
OLDDECLARG(krb5_encrypt_block *, eblock)
OLDDECLARG(const krb5_keyblock *,keyblock)
{
struct mit_des_ks_struct *schedule; /* pointer to key schedules */
if (keyblock->length != 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() { free( (char *) schedule); }
switch (mit_des_key_sched (keyblock->contents, schedule)) {
case -1:
cleanup();
return KRB5DES_BAD_KEYPAR;
case -2:
cleanup();
return KRB5DES_WEAK_KEY;
default:
eblock->key = (krb5_keyblock *) keyblock;
eblock->priv = (krb5_pointer) schedule;
return 0;
}
}
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