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/*
* lib/crypto/md4/md4crypto.c
*
* Copyright 1991 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.
*
*
* Kerberos glue for MD4 sample implementation.
*/
#include "k5-int.h"
#include "rsa-md4.h"
#include "des_int.h" /* we cheat a bit and call it directly... */
static krb5_error_code
md4_crypto_sum_func(in, in_length, seed, seed_length, outcksum)
krb5_pointer in;
size_t in_length;
krb5_pointer seed;
size_t seed_length;
krb5_checksum *outcksum;
{
krb5_octet outtmp[RSA_MD4_DES_CKSUM_LENGTH];
krb5_octet *input = (krb5_octet *)in;
krb5_encrypt_block eblock;
krb5_keyblock keyblock;
krb5_error_code retval;
MD4_CTX working;
MD4Init(&working);
MD4Update(&working, input, in_length);
MD4Final(&working);
outcksum->checksum_type = CKSUMTYPE_RSA_MD4_DES;
outcksum->length = RSA_MD4_DES_CKSUM_LENGTH;
memcpy((char *)outtmp, (char *)&working.digest[0], 16);
memset((char *)&working, 0, sizeof(working));
keyblock.length = seed_length;
keyblock.contents = (krb5_octet *)seed;
keyblock.keytype = KEYTYPE_DES;
if (retval = mit_des_process_key(&eblock, &keyblock))
return retval;
/* now encrypt it */
retval = mit_des_cbc_encrypt(&outtmp[0],
outcksum->contents,
RSA_MD4_DES_CKSUM_LENGTH,
(struct mit_des_ks_struct *)eblock.priv,
keyblock.contents,
MIT_DES_ENCRYPT);
if (retval) {
(void) mit_des_finish_key(&eblock);
return retval;
}
return mit_des_finish_key(&eblock);
}
krb5_checksum_entry rsa_md4_des_cksumtable_entry = {
0,
md4_crypto_sum_func,
RSA_MD4_DES_CKSUM_LENGTH,
1, /* is collision proof */
1, /* uses key */
};
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