bf4c239e47
This error looks like it was a simple copy-paste typo in the original commit for this code (r275732). PR: 204009 Reported by: Chang-Hsien Tsai <luke.tw AT gmail.com> Sponsored by: EMC / Isilon Storage Division
153 lines
4.1 KiB
C
153 lines
4.1 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 <opencrypto/xform_enc.h>
|
|
|
|
static int aes_icm_setkey(u_int8_t **, u_int8_t *, int);
|
|
static void aes_icm_crypt(caddr_t, u_int8_t *);
|
|
static void aes_icm_zerokey(u_int8_t **);
|
|
static void aes_icm_reinit(caddr_t, u_int8_t *);
|
|
static void aes_gcm_reinit(caddr_t, u_int8_t *);
|
|
|
|
/* Encryption instances */
|
|
struct enc_xform enc_xform_aes_icm = {
|
|
CRYPTO_AES_ICM, "AES-ICM",
|
|
AES_BLOCK_LEN, AES_BLOCK_LEN, AES_MIN_KEY, AES_MAX_KEY,
|
|
aes_icm_crypt,
|
|
aes_icm_crypt,
|
|
aes_icm_setkey,
|
|
aes_icm_zerokey,
|
|
aes_icm_reinit,
|
|
};
|
|
|
|
struct enc_xform enc_xform_aes_nist_gcm = {
|
|
CRYPTO_AES_NIST_GCM_16, "AES-GCM",
|
|
AES_ICM_BLOCK_LEN, AES_GCM_IV_LEN, AES_MIN_KEY, AES_MAX_KEY,
|
|
aes_icm_crypt,
|
|
aes_icm_crypt,
|
|
aes_icm_setkey,
|
|
aes_icm_zerokey,
|
|
aes_gcm_reinit,
|
|
};
|
|
|
|
/*
|
|
* Encryption wrapper routines.
|
|
*/
|
|
static void
|
|
aes_icm_reinit(caddr_t key, u_int8_t *iv)
|
|
{
|
|
struct aes_icm_ctx *ctx;
|
|
|
|
ctx = (struct aes_icm_ctx *)key;
|
|
bcopy(iv, ctx->ac_block, AESICM_BLOCKSIZE);
|
|
}
|
|
|
|
static void
|
|
aes_gcm_reinit(caddr_t key, u_int8_t *iv)
|
|
{
|
|
struct aes_icm_ctx *ctx;
|
|
|
|
aes_icm_reinit(key, iv);
|
|
|
|
ctx = (struct aes_icm_ctx *)key;
|
|
/* GCM starts with 2 as counter 1 is used for final xor of tag. */
|
|
bzero(&ctx->ac_block[AESICM_BLOCKSIZE - 4], 4);
|
|
ctx->ac_block[AESICM_BLOCKSIZE - 1] = 2;
|
|
}
|
|
|
|
static void
|
|
aes_icm_crypt(caddr_t key, u_int8_t *data)
|
|
{
|
|
struct aes_icm_ctx *ctx;
|
|
u_int8_t keystream[AESICM_BLOCKSIZE];
|
|
int i;
|
|
|
|
ctx = (struct aes_icm_ctx *)key;
|
|
rijndaelEncrypt(ctx->ac_ek, ctx->ac_nr, ctx->ac_block, keystream);
|
|
for (i = 0; i < AESICM_BLOCKSIZE; i++)
|
|
data[i] ^= keystream[i];
|
|
explicit_bzero(keystream, sizeof(keystream));
|
|
|
|
/* increment counter */
|
|
for (i = AESICM_BLOCKSIZE - 1;
|
|
i >= 0; i--)
|
|
if (++ctx->ac_block[i]) /* continue on overflow */
|
|
break;
|
|
}
|
|
|
|
static int
|
|
aes_icm_setkey(u_int8_t **sched, u_int8_t *key, int len)
|
|
{
|
|
struct aes_icm_ctx *ctx;
|
|
|
|
if (len != 16 && len != 24 && len != 32)
|
|
return EINVAL;
|
|
|
|
*sched = KMALLOC(sizeof(struct aes_icm_ctx), M_CRYPTO_DATA,
|
|
M_NOWAIT | M_ZERO);
|
|
if (*sched == NULL)
|
|
return ENOMEM;
|
|
|
|
ctx = (struct aes_icm_ctx *)*sched;
|
|
ctx->ac_nr = rijndaelKeySetupEnc(ctx->ac_ek, (u_char *)key, len * 8);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
aes_icm_zerokey(u_int8_t **sched)
|
|
{
|
|
|
|
bzero(*sched, sizeof(struct aes_icm_ctx));
|
|
KFREE(*sched, M_CRYPTO_DATA);
|
|
*sched = NULL;
|
|
}
|