159 lines
4.4 KiB
C
159 lines
4.4 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <opencrypto/xform.h>
|
|
|
|
#include "glxsb.h"
|
|
|
|
/*
|
|
* Implementation notes.
|
|
*
|
|
* The Geode LX Security Block provides AES-128-CBC acceleration.
|
|
* We implement all HMAC algorithms provided by crypto(9) framework so glxsb can work
|
|
* with ipsec(4)
|
|
*
|
|
* This code was stolen from crypto/via/padlock_hash.c
|
|
*/
|
|
|
|
MALLOC_DECLARE(M_GLXSB);
|
|
|
|
static void
|
|
glxsb_hash_key_setup(struct glxsb_session *ses, const char *key, int klen)
|
|
{
|
|
const struct auth_hash *axf;
|
|
|
|
axf = ses->ses_axf;
|
|
hmac_init_ipad(axf, key, klen, ses->ses_ictx);
|
|
hmac_init_opad(axf, key, klen, ses->ses_octx);
|
|
}
|
|
|
|
/*
|
|
* Compute keyed-hash authenticator.
|
|
*/
|
|
static int
|
|
glxsb_authcompute(struct glxsb_session *ses, struct cryptop *crp)
|
|
{
|
|
u_char hash[HASH_MAX_LEN];
|
|
const struct auth_hash *axf;
|
|
union authctx ctx;
|
|
int error;
|
|
|
|
axf = ses->ses_axf;
|
|
bcopy(ses->ses_ictx, &ctx, axf->ctxsize);
|
|
error = crypto_apply(crp, crp->crp_aad_start, crp->crp_aad_length,
|
|
axf->Update, &ctx);
|
|
if (error != 0)
|
|
return (error);
|
|
error = crypto_apply(crp, crp->crp_payload_start,
|
|
crp->crp_payload_length, axf->Update, &ctx);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
axf->Final(hash, &ctx);
|
|
|
|
bcopy(ses->ses_octx, &ctx, axf->ctxsize);
|
|
axf->Update(&ctx, hash, axf->hashsize);
|
|
axf->Final(hash, &ctx);
|
|
explicit_bzero(&ctx, sizeof(ctx));
|
|
|
|
/* Verify or inject the authentication data */
|
|
if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
|
|
u_char hash2[HASH_MAX_LEN];
|
|
|
|
crypto_copydata(crp, crp->crp_digest_start, ses->ses_mlen,
|
|
hash2);
|
|
if (timingsafe_bcmp(hash, hash2, ses->ses_mlen) != 0)
|
|
error = EBADMSG;
|
|
explicit_bzero(hash2, sizeof(hash2));
|
|
} else
|
|
crypto_copyback(crp, crp->crp_digest_start, ses->ses_mlen,
|
|
hash);
|
|
explicit_bzero(hash, sizeof(hash));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
glxsb_hash_setup(struct glxsb_session *ses,
|
|
const struct crypto_session_params *csp)
|
|
{
|
|
|
|
ses->ses_axf = crypto_auth_hash(csp);
|
|
if (csp->csp_auth_mlen == 0)
|
|
ses->ses_mlen = ses->ses_axf->hashsize;
|
|
else
|
|
ses->ses_mlen = csp->csp_auth_mlen;
|
|
|
|
/* Allocate memory for HMAC inner and outer contexts. */
|
|
ses->ses_ictx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
|
|
M_ZERO | M_NOWAIT);
|
|
ses->ses_octx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
|
|
M_ZERO | M_NOWAIT);
|
|
if (ses->ses_ictx == NULL || ses->ses_octx == NULL)
|
|
return (ENOMEM);
|
|
|
|
/* Setup key if given. */
|
|
if (csp->csp_auth_key != NULL) {
|
|
glxsb_hash_key_setup(ses, csp->csp_auth_key,
|
|
csp->csp_auth_klen);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
glxsb_hash_process(struct glxsb_session *ses,
|
|
const struct crypto_session_params *csp, struct cryptop *crp)
|
|
{
|
|
int error;
|
|
|
|
if (crp->crp_auth_key != NULL)
|
|
glxsb_hash_key_setup(ses, crp->crp_auth_key,
|
|
csp->csp_auth_klen);
|
|
|
|
error = glxsb_authcompute(ses, crp);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
glxsb_hash_free(struct glxsb_session *ses)
|
|
{
|
|
|
|
if (ses->ses_ictx != NULL) {
|
|
zfree(ses->ses_ictx, M_GLXSB);
|
|
ses->ses_ictx = NULL;
|
|
}
|
|
if (ses->ses_octx != NULL) {
|
|
zfree(ses->ses_octx, M_GLXSB);
|
|
ses->ses_octx = NULL;
|
|
}
|
|
}
|