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,
76 (int (*)(void *, void *, unsigned int))axf->Update, (caddr_t)&ctx);
79 error = crypto_apply(crp, crp->crp_payload_start,
80 crp->crp_payload_length,
81 (int (*)(void *, void *, unsigned int))axf->Update, (caddr_t)&ctx);
85 axf->Final(hash, &ctx);
87 bcopy(ses->ses_octx, &ctx, axf->ctxsize);
88 axf->Update(&ctx, hash, axf->hashsize);
89 axf->Final(hash, &ctx);
91 /* Verify or inject the authentication data */
92 if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
93 crypto_copydata(crp, crp->crp_digest_start, ses->ses_mlen,
95 if (timingsafe_bcmp(hash, hash2, ses->ses_mlen) != 0)
98 crypto_copyback(crp, crp->crp_digest_start, ses->ses_mlen,
104 glxsb_hash_setup(struct glxsb_session *ses,
105 const struct crypto_session_params *csp)
108 ses->ses_axf = crypto_auth_hash(csp);
109 if (csp->csp_auth_mlen == 0)
110 ses->ses_mlen = ses->ses_axf->hashsize;
112 ses->ses_mlen = csp->csp_auth_mlen;
114 /* Allocate memory for HMAC inner and outer contexts. */
115 ses->ses_ictx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
117 ses->ses_octx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
119 if (ses->ses_ictx == NULL || ses->ses_octx == NULL)
122 /* Setup key if given. */
123 if (csp->csp_auth_key != NULL) {
124 glxsb_hash_key_setup(ses, csp->csp_auth_key,
131 glxsb_hash_process(struct glxsb_session *ses,
132 const struct crypto_session_params *csp, struct cryptop *crp)
136 if (crp->crp_auth_key != NULL)
137 glxsb_hash_key_setup(ses, crp->crp_auth_key,
140 error = glxsb_authcompute(ses, crp);
145 glxsb_hash_free(struct glxsb_session *ses)
148 if (ses->ses_ictx != NULL) {
149 bzero(ses->ses_ictx, ses->ses_axf->ctxsize);
150 free(ses->ses_ictx, M_GLXSB);
151 ses->ses_ictx = NULL;
153 if (ses->ses_octx != NULL) {
154 bzero(ses->ses_octx, ses->ses_axf->ctxsize);
155 free(ses->ses_octx, M_GLXSB);
156 ses->ses_octx = NULL;