128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/* $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 <crypto/blowfish/blowfish.h>
|
|
#include <opencrypto/xform_enc.h>
|
|
|
|
static int blf_setkey(u_int8_t **, u_int8_t *, int);
|
|
static void blf_encrypt(caddr_t, u_int8_t *);
|
|
static void blf_decrypt(caddr_t, u_int8_t *);
|
|
static void blf_zerokey(u_int8_t **);
|
|
|
|
/* Encryption instances */
|
|
struct enc_xform enc_xform_blf = {
|
|
CRYPTO_BLF_CBC, "Blowfish",
|
|
BLOWFISH_BLOCK_LEN, BLOWFISH_BLOCK_LEN, BLOWFISH_MIN_KEY,
|
|
BLOWFISH_MAX_KEY,
|
|
blf_encrypt,
|
|
blf_decrypt,
|
|
blf_setkey,
|
|
blf_zerokey,
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* Encryption wrapper routines.
|
|
*/
|
|
static void
|
|
blf_encrypt(caddr_t key, u_int8_t *blk)
|
|
{
|
|
BF_LONG t[2];
|
|
|
|
memcpy(t, blk, sizeof (t));
|
|
t[0] = ntohl(t[0]);
|
|
t[1] = ntohl(t[1]);
|
|
/* NB: BF_encrypt expects the block in host order! */
|
|
BF_encrypt(t, (BF_KEY *) key);
|
|
t[0] = htonl(t[0]);
|
|
t[1] = htonl(t[1]);
|
|
memcpy(blk, t, sizeof (t));
|
|
}
|
|
|
|
static void
|
|
blf_decrypt(caddr_t key, u_int8_t *blk)
|
|
{
|
|
BF_LONG t[2];
|
|
|
|
memcpy(t, blk, sizeof (t));
|
|
t[0] = ntohl(t[0]);
|
|
t[1] = ntohl(t[1]);
|
|
/* NB: BF_decrypt expects the block in host order! */
|
|
BF_decrypt(t, (BF_KEY *) key);
|
|
t[0] = htonl(t[0]);
|
|
t[1] = htonl(t[1]);
|
|
memcpy(blk, t, sizeof (t));
|
|
}
|
|
|
|
static int
|
|
blf_setkey(u_int8_t **sched, u_int8_t *key, int len)
|
|
{
|
|
int err;
|
|
|
|
*sched = KMALLOC(sizeof(BF_KEY),
|
|
M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
|
|
if (*sched != NULL) {
|
|
BF_set_key((BF_KEY *) *sched, len, key);
|
|
err = 0;
|
|
} else
|
|
err = ENOMEM;
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
blf_zerokey(u_int8_t **sched)
|
|
{
|
|
bzero(*sched, sizeof(BF_KEY));
|
|
KFREE(*sched, M_CRYPTO_DATA);
|
|
*sched = NULL;
|
|
}
|