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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2021 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include <unistd.h>
#include <lber.h>
#include <lber_pvt.h>
#include "lutil.h"
#include "lutil_md5.h"
#include <ac/string.h>
static LUTIL_PASSWD_CHK_FUNC chk_ns_mta_md5;
static const struct berval scheme = BER_BVC("{NS-MTA-MD5}");
#define NS_MTA_MD5_PASSLEN 64
static int chk_ns_mta_md5(
const struct berval *scheme,
const struct berval *passwd,
const struct berval *cred,
const char **text )
{
lutil_MD5_CTX MD5context;
unsigned char MD5digest[LUTIL_MD5_BYTES], c;
char buffer[LUTIL_MD5_BYTES*2];
int i;
if( passwd->bv_len != NS_MTA_MD5_PASSLEN ) {
return LUTIL_PASSWD_ERR;
}
/* hash credentials with salt */
lutil_MD5Init(&MD5context);
lutil_MD5Update(&MD5context,
(const unsigned char *) &passwd->bv_val[32],
32 );
c = 0x59;
lutil_MD5Update(&MD5context,
(const unsigned char *) &c,
1 );
lutil_MD5Update(&MD5context,
(const unsigned char *) cred->bv_val,
cred->bv_len );
c = 0xF7;
lutil_MD5Update(&MD5context,
(const unsigned char *) &c,
1 );
lutil_MD5Update(&MD5context,
(const unsigned char *) &passwd->bv_val[32],
32 );
lutil_MD5Final(MD5digest, &MD5context);
for( i=0; i < sizeof( MD5digest ); i++ ) {
buffer[i+i] = "0123456789abcdef"[(MD5digest[i]>>4) & 0x0F];
buffer[i+i+1] = "0123456789abcdef"[ MD5digest[i] & 0x0F];
}
/* compare */
return memcmp((char *)passwd->bv_val,
(char *)buffer, sizeof(buffer)) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
}
int init_module(int argc, char *argv[]) {
return lutil_passwd_add( (struct berval *)&scheme, chk_ns_mta_md5, NULL );
}
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