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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/kdb/encrypt_key.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. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* 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.
*/
/*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* 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 FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "k5-int.h"
#include "kdb.h"
/*
* Encrypt a key for storage in the database. "eblock" is used
* to encrypt the key in "in" into "out"; the storage pointed to by "out"
* is allocated before use.
*/
krb5_error_code
krb5_dbe_def_encrypt_key_data( krb5_context context,
const krb5_keyblock * mkey,
const krb5_keyblock * dbkey,
const krb5_keysalt * keysalt,
int keyver,
krb5_key_data * key_data)
{
krb5_error_code retval;
krb5_octet * ptr;
size_t len;
int i;
krb5_data plain;
krb5_enc_data cipher;
for (i = 0; i < key_data->key_data_ver; i++)
if (key_data->key_data_contents[i])
free(key_data->key_data_contents[i]);
key_data->key_data_ver = 1;
key_data->key_data_kvno = keyver;
/*
* The First element of the type/length/contents
* fields is the key type/length/contents
*/
if ((retval = krb5_c_encrypt_length(context, mkey->enctype, dbkey->length,
&len)))
return(retval);
if ((ptr = (krb5_octet *) malloc(2 + len)) == NULL)
return(ENOMEM);
key_data->key_data_type[0] = dbkey->enctype;
key_data->key_data_length[0] = 2 + len;
key_data->key_data_contents[0] = ptr;
krb5_kdb_encode_int16(dbkey->length, ptr);
ptr += 2;
plain.length = dbkey->length;
plain.data = (char *) dbkey->contents;
cipher.ciphertext.length = len;
cipher.ciphertext.data = (char *) ptr;
if ((retval = krb5_c_encrypt(context, mkey, /* XXX */ 0, 0,
&plain, &cipher))) {
free(key_data->key_data_contents[0]);
return retval;
}
/* After key comes the salt in necessary */
if (keysalt) {
if (keysalt->type > 0) {
key_data->key_data_ver++;
key_data->key_data_type[1] = keysalt->type;
if ((key_data->key_data_length[1] = keysalt->data.length) != 0) {
key_data->key_data_contents[1] =
(krb5_octet *)malloc(keysalt->data.length);
if (key_data->key_data_contents[1] == NULL) {
free(key_data->key_data_contents[0]);
return ENOMEM;
}
memcpy(key_data->key_data_contents[1], keysalt->data.data,
(size_t) keysalt->data.length);
}
}
}
return retval;
}
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