/* $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/xform_auth.h>
#include <opencrypto/xform_enc.h>
static int null_setkey(u_int8_t **, u_int8_t *, int);
static void null_encrypt(caddr_t, u_int8_t *);
static void null_decrypt(caddr_t, u_int8_t *);
static void null_zerokey(u_int8_t **);
static void null_init(void *);
static void null_reinit(void *ctx, const u_int8_t *buf, u_int16_t len);
static int null_update(void *, const u_int8_t *, u_int16_t);
static void null_final(u_int8_t *, void *);
/* Encryption instances */
struct enc_xform enc_xform_null = {
CRYPTO_NULL_CBC, "NULL",
/* NB: blocksize of 4 is to generate a properly aligned ESP header */
NULL_BLOCK_LEN, 0, NULL_MIN_KEY, NULL_MAX_KEY,
null_encrypt,
null_decrypt,
null_setkey,
null_zerokey,
NULL,
};
/* Authentication instances */
struct auth_hash auth_hash_null = {
.type = CRYPTO_NULL_HMAC,
.name = "NULL-HMAC",
.keysize = 0,
.hashsize = NULL_HASH_LEN,
.ctxsize = sizeof(int), /* NB: context isn't used */
.blocksize = NULL_HMAC_BLOCK_LEN,
.Init = null_init,
.Setkey = null_reinit,
.Reinit = null_reinit,
.Update = null_update,
.Final = null_final,
};
/*
* Encryption wrapper routines.
*/
static void
null_encrypt(caddr_t key, u_int8_t *blk)
{
}
static void
null_decrypt(caddr_t key, u_int8_t *blk)
{
}
static int
null_setkey(u_int8_t **sched, u_int8_t *key, int len)
{
*sched = NULL;
return 0;
}
static void
null_zerokey(u_int8_t **sched)
{
*sched = NULL;
}
/*
* And now for auth.
*/
static void
null_init(void *ctx)
{
}
static void
null_reinit(void *ctx, const u_int8_t *buf, u_int16_t len)
{
}
static int
null_update(void *ctx, const u_int8_t *buf, u_int16_t len)
{
return 0;
}
static void
null_final(u_int8_t *buf, void *ctx)
{
if (buf != (u_int8_t *) 0)
bzero(buf, 12);
}
