2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
36 #include <opencrypto/xform.h>
41 * Implementation notes.
43 * The Geode LX Security Block provides AES-128-CBC acceleration.
44 * We implement all HMAC algorithms provided by crypto(9) framework so glxsb can work
47 * This code was stolen from crypto/via/padlock_hash.c
50 MALLOC_DECLARE(M_GLXSB);
53 glxsb_hash_key_setup(struct glxsb_session *ses, const char *key, int klen)
55 struct auth_hash *axf;
58 hmac_init_ipad(axf, key, klen, ses->ses_ictx);
59 hmac_init_opad(axf, key, klen, ses->ses_octx);
63 * Compute keyed-hash authenticator.
66 glxsb_authcompute(struct glxsb_session *ses, struct cryptop *crp)
68 u_char hash[HASH_MAX_LEN], hash2[HASH_MAX_LEN];
69 struct auth_hash *axf;
74 bcopy(ses->ses_ictx, &ctx, axf->ctxsize);
75 error = crypto_apply(crp, crp->crp_aad_start, crp->crp_aad_length,
79 error = crypto_apply(crp, crp->crp_payload_start,
80 crp->crp_payload_length, axf->Update, &ctx);
84 axf->Final(hash, &ctx);
86 bcopy(ses->ses_octx, &ctx, axf->ctxsize);
87 axf->Update(&ctx, hash, axf->hashsize);
88 axf->Final(hash, &ctx);
90 /* Verify or inject the authentication data */
91 if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
92 crypto_copydata(crp, crp->crp_digest_start, ses->ses_mlen,
94 if (timingsafe_bcmp(hash, hash2, ses->ses_mlen) != 0)
97 crypto_copyback(crp, crp->crp_digest_start, ses->ses_mlen,
103 glxsb_hash_setup(struct glxsb_session *ses,
104 const struct crypto_session_params *csp)
107 ses->ses_axf = crypto_auth_hash(csp);
108 if (csp->csp_auth_mlen == 0)
109 ses->ses_mlen = ses->ses_axf->hashsize;
111 ses->ses_mlen = csp->csp_auth_mlen;
113 /* Allocate memory for HMAC inner and outer contexts. */
114 ses->ses_ictx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
116 ses->ses_octx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
118 if (ses->ses_ictx == NULL || ses->ses_octx == NULL)
121 /* Setup key if given. */
122 if (csp->csp_auth_key != NULL) {
123 glxsb_hash_key_setup(ses, csp->csp_auth_key,
130 glxsb_hash_process(struct glxsb_session *ses,
131 const struct crypto_session_params *csp, struct cryptop *crp)
135 if (crp->crp_auth_key != NULL)
136 glxsb_hash_key_setup(ses, crp->crp_auth_key,
139 error = glxsb_authcompute(ses, crp);
144 glxsb_hash_free(struct glxsb_session *ses)
147 if (ses->ses_ictx != NULL) {
148 bzero(ses->ses_ictx, ses->ses_axf->ctxsize);
149 free(ses->ses_ictx, M_GLXSB);
150 ses->ses_ictx = NULL;
152 if (ses->ses_octx != NULL) {
153 bzero(ses->ses_octx, ses->ses_axf->ctxsize);
154 free(ses->ses_octx, M_GLXSB);
155 ses->ses_octx = NULL;