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/*
* lib/crypto/md4/md4glue.c
*
* Copyright 1990,1991 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"
/* Windows needs to these prototypes for the assignment below */
krb5_error_code
krb5_md4_sum_func PROTOTYPE((krb5_pointer in, size_t in_length,
krb5_pointer seed, size_t seed_length, krb5_checksum *outcksum));
krb5_error_code
krb5_md4_verify_func PROTOTYPE((krb5_checksum FAR *cksum, krb5_pointer in,
size_t in_length, krb5_pointer seed, size_t seed_length));
krb5_error_code
krb5_md4_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 FAR *outcksum;
{
krb5_octet *input = (krb5_octet *)in;
krb5_MD4_CTX working;
if (outcksum->length < RSA_MD4_CKSUM_LENGTH)
return KRB5_BAD_MSIZE;
krb5_MD4Init(&working);
krb5_MD4Update(&working, input, in_length);
krb5_MD4Final(&working);
outcksum->checksum_type = CKSUMTYPE_RSA_MD4;
outcksum->length = RSA_MD4_CKSUM_LENGTH;
memcpy((char *)outcksum->contents, (char *)&working.digest[0],
RSA_MD4_CKSUM_LENGTH);
memset((char *)&working, 0, sizeof(working));
return 0;
}
krb5_error_code
krb5_md4_verify_func(cksum, in, in_length, seed, seed_length)
krb5_checksum FAR *cksum;
krb5_pointer in;
size_t in_length;
krb5_pointer seed;
size_t seed_length;
{
krb5_octet *input = (krb5_octet *)in;
krb5_MD4_CTX working;
krb5_error_code retval;
retval = 0;
if (cksum->checksum_type == CKSUMTYPE_RSA_MD4) {
if (cksum->length == RSA_MD4_CKSUM_LENGTH) {
krb5_MD4Init(&working);
krb5_MD4Update(&working, input, in_length);
krb5_MD4Final(&working);
if (memcmp((char *) cksum->contents,
(char *) &working.digest[0],
RSA_MD4_CKSUM_LENGTH))
retval = KRB5KRB_AP_ERR_BAD_INTEGRITY;
memset((char *)&working, 0, sizeof(working));
}
else
retval = KRB5KRB_AP_ERR_BAD_INTEGRITY;
}
else
retval = KRB5KRB_AP_ERR_INAPP_CKSUM;
return retval;
}
krb5_checksum_entry rsa_md4_cksumtable_entry = {
0,
krb5_md4_sum_func,
krb5_md4_verify_func,
RSA_MD4_CKSUM_LENGTH,
1, /* is collision proof */
0, /* doesn't use key */
};
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