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/* $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $ */
/*-
* The authors of this code are John Ioannidis (ji@tla.org),
* Angelos D. Keromytis (kermit@csd.uch.gr),
* Niels Provos (provos@physnet.uni-hamburg.de) and
* Damien Miller (djm@mindrot.org).
*
* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
* in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis.
*
* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
* and Niels Provos.
*
* Additional features in 1999 by Angelos D. Keromytis.
*
* AES XTS implementation in 2008 by Damien Miller
*
* Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
* Angelos D. Keromytis and Niels Provos.
*
* Copyright (C) 2001, Angelos D. Keromytis.
*
* Copyright (C) 2008, Damien Miller
* Copyright (c) 2014 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by John-Mark Gurney
* under sponsorship of the FreeBSD Foundation and
* Rubicon Communications, LLC (Netgate).
*
* Permission to use, copy, and modify this software with or without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
* You may use this code under the GNU public license if you so wish. Please
* contribute changes back to the authors under this freer than GPL license
* so that we may further the use of strong encryption without limitations to
* all.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <opencrypto/cast.h>
#include <opencrypto/xform_enc.h>
static int cast5_setkey(u_int8_t **, u_int8_t *, int);
static void cast5_encrypt(caddr_t, u_int8_t *);
static void cast5_decrypt(caddr_t, u_int8_t *);
static void cast5_zerokey(u_int8_t **);
/* Encryption instances */
struct enc_xform enc_xform_cast5 = {
CRYPTO_CAST_CBC, "CAST-128",
CAST128_BLOCK_LEN, CAST128_BLOCK_LEN, CAST_MIN_KEY, CAST_MAX_KEY,
cast5_encrypt,
cast5_decrypt,
cast5_setkey,
cast5_zerokey,
NULL,
};
/*
* Encryption wrapper routines.
*/
static void
cast5_encrypt(caddr_t key, u_int8_t *blk)
{
cast_encrypt((cast_key *) key, blk, blk);
}
static void
cast5_decrypt(caddr_t key, u_int8_t *blk)
{
cast_decrypt((cast_key *) key, blk, blk);
}
static int
cast5_setkey(u_int8_t **sched, u_int8_t *key, int len)
{
int err;
*sched = KMALLOC(sizeof(cast_key), M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
if (*sched != NULL) {
cast_setkey((cast_key *)*sched, key, len);
err = 0;
} else
err = ENOMEM;
return err;
}
static void
cast5_zerokey(u_int8_t **sched)
{
bzero(*sched, sizeof(cast_key));
KFREE(*sched, M_CRYPTO_DATA);
*sched = NULL;
}
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