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/cryptosoft.h> /* for hmac_ipad_buffer and hmac_opad_buffer */
37 #include <opencrypto/xform.h>
42 * Implementation notes.
44 * The Geode LX Security Block provides AES-128-CBC acceleration.
45 * We implement all HMAC algorithms provided by crypto(9) framework so glxsb can work
48 * This code was stolen from crypto/via/padlock_hash.c
51 MALLOC_DECLARE(M_GLXSB);
54 glxsb_hash_key_setup(struct glxsb_session *ses, caddr_t key, int klen)
56 struct auth_hash *axf;
62 for (i = 0; i < klen; i++)
63 key[i] ^= HMAC_IPAD_VAL;
65 axf->Init(ses->ses_ictx);
66 axf->Update(ses->ses_ictx, key, klen);
67 axf->Update(ses->ses_ictx, hmac_ipad_buffer, axf->blocksize - klen);
69 for (i = 0; i < klen; i++)
70 key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL);
72 axf->Init(ses->ses_octx);
73 axf->Update(ses->ses_octx, key, klen);
74 axf->Update(ses->ses_octx, hmac_opad_buffer, axf->blocksize - klen);
76 for (i = 0; i < klen; i++)
77 key[i] ^= HMAC_OPAD_VAL;
81 * Compute keyed-hash authenticator.
84 glxsb_authcompute(struct glxsb_session *ses, struct cryptodesc *crd,
85 caddr_t buf, int flags)
87 u_char hash[HASH_MAX_LEN];
88 struct auth_hash *axf;
93 bcopy(ses->ses_ictx, &ctx, axf->ctxsize);
94 error = crypto_apply(flags, buf, crd->crd_skip, crd->crd_len,
95 (int (*)(void *, void *, unsigned int))axf->Update, (caddr_t)&ctx);
98 axf->Final(hash, &ctx);
100 bcopy(ses->ses_octx, &ctx, axf->ctxsize);
101 axf->Update(&ctx, hash, axf->hashsize);
102 axf->Final(hash, &ctx);
104 /* Inject the authentication data */
105 crypto_copyback(flags, buf, crd->crd_inject,
106 ses->ses_mlen == 0 ? axf->hashsize : ses->ses_mlen, hash);
111 glxsb_hash_setup(struct glxsb_session *ses, struct cryptoini *macini)
114 ses->ses_mlen = macini->cri_mlen;
116 /* Find software structure which describes HMAC algorithm. */
117 switch (macini->cri_alg) {
118 case CRYPTO_NULL_HMAC:
119 ses->ses_axf = &auth_hash_null;
121 case CRYPTO_MD5_HMAC:
122 ses->ses_axf = &auth_hash_hmac_md5;
124 case CRYPTO_SHA1_HMAC:
125 ses->ses_axf = &auth_hash_hmac_sha1;
127 case CRYPTO_RIPEMD160_HMAC:
128 ses->ses_axf = &auth_hash_hmac_ripemd_160;
130 case CRYPTO_SHA2_256_HMAC:
131 ses->ses_axf = &auth_hash_hmac_sha2_256;
133 case CRYPTO_SHA2_384_HMAC:
134 ses->ses_axf = &auth_hash_hmac_sha2_384;
136 case CRYPTO_SHA2_512_HMAC:
137 ses->ses_axf = &auth_hash_hmac_sha2_512;
141 /* Allocate memory for HMAC inner and outer contexts. */
142 ses->ses_ictx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
144 ses->ses_octx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
146 if (ses->ses_ictx == NULL || ses->ses_octx == NULL)
149 /* Setup key if given. */
150 if (macini->cri_key != NULL) {
151 glxsb_hash_key_setup(ses, macini->cri_key,
158 glxsb_hash_process(struct glxsb_session *ses, struct cryptodesc *maccrd,
163 if ((maccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0)
164 glxsb_hash_key_setup(ses, maccrd->crd_key, maccrd->crd_klen);
166 error = glxsb_authcompute(ses, maccrd, crp->crp_buf, crp->crp_flags);
171 glxsb_hash_free(struct glxsb_session *ses)
174 if (ses->ses_ictx != NULL) {
175 bzero(ses->ses_ictx, ses->ses_axf->ctxsize);
176 free(ses->ses_ictx, M_GLXSB);
177 ses->ses_ictx = NULL;
179 if (ses->ses_octx != NULL) {
180 bzero(ses->ses_octx, ses->ses_axf->ctxsize);
181 free(ses->ses_octx, M_GLXSB);
182 ses->ses_octx = NULL;