2 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/malloc.h>
33 #include <opencrypto/cryptosoft.h> /* for hmac_ipad_buffer and hmac_opad_buffer */
34 #include <opencrypto/xform.h>
39 * Implementation notes.
41 * The Geode LX Security Block provides AES-128-CBC acceleration.
42 * We implement all HMAC algorithms provided by crypto(9) framework so glxsb can work
45 * This code was stolen from crypto/via/padlock_hash.c
48 MALLOC_DECLARE(M_GLXSB);
51 glxsb_hash_key_setup(struct glxsb_session *ses, caddr_t key, int klen)
53 struct auth_hash *axf;
59 for (i = 0; i < klen; i++)
60 key[i] ^= HMAC_IPAD_VAL;
62 axf->Init(ses->ses_ictx);
63 axf->Update(ses->ses_ictx, key, klen);
64 axf->Update(ses->ses_ictx, hmac_ipad_buffer, axf->blocksize - klen);
66 for (i = 0; i < klen; i++)
67 key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL);
69 axf->Init(ses->ses_octx);
70 axf->Update(ses->ses_octx, key, klen);
71 axf->Update(ses->ses_octx, hmac_opad_buffer, axf->blocksize - klen);
73 for (i = 0; i < klen; i++)
74 key[i] ^= HMAC_OPAD_VAL;
78 * Compute keyed-hash authenticator.
81 glxsb_authcompute(struct glxsb_session *ses, struct cryptodesc *crd,
82 caddr_t buf, int flags)
84 u_char hash[HASH_MAX_LEN];
85 struct auth_hash *axf;
90 bcopy(ses->ses_ictx, &ctx, axf->ctxsize);
91 error = crypto_apply(flags, buf, crd->crd_skip, crd->crd_len,
92 (int (*)(void *, void *, unsigned int))axf->Update, (caddr_t)&ctx);
95 axf->Final(hash, &ctx);
97 bcopy(ses->ses_octx, &ctx, axf->ctxsize);
98 axf->Update(&ctx, hash, axf->hashsize);
99 axf->Final(hash, &ctx);
101 /* Inject the authentication data */
102 crypto_copyback(flags, buf, crd->crd_inject,
103 ses->ses_mlen == 0 ? axf->hashsize : ses->ses_mlen, hash);
108 glxsb_hash_setup(struct glxsb_session *ses, struct cryptoini *macini)
111 ses->ses_mlen = macini->cri_mlen;
113 /* Find software structure which describes HMAC algorithm. */
114 switch (macini->cri_alg) {
115 case CRYPTO_NULL_HMAC:
116 ses->ses_axf = &auth_hash_null;
118 case CRYPTO_MD5_HMAC:
119 ses->ses_axf = &auth_hash_hmac_md5;
121 case CRYPTO_SHA1_HMAC:
122 ses->ses_axf = &auth_hash_hmac_sha1;
124 case CRYPTO_RIPEMD160_HMAC:
125 ses->ses_axf = &auth_hash_hmac_ripemd_160;
127 case CRYPTO_SHA2_256_HMAC:
128 ses->ses_axf = &auth_hash_hmac_sha2_256;
130 case CRYPTO_SHA2_384_HMAC:
131 ses->ses_axf = &auth_hash_hmac_sha2_384;
133 case CRYPTO_SHA2_512_HMAC:
134 ses->ses_axf = &auth_hash_hmac_sha2_512;
138 /* Allocate memory for HMAC inner and outer contexts. */
139 ses->ses_ictx = kmalloc(ses->ses_axf->ctxsize, M_GLXSB,
141 ses->ses_octx = kmalloc(ses->ses_axf->ctxsize, M_GLXSB,
143 if (ses->ses_ictx == NULL || ses->ses_octx == NULL)
146 /* Setup key if given. */
147 if (macini->cri_key != NULL) {
148 glxsb_hash_key_setup(ses, macini->cri_key,
155 glxsb_hash_process(struct glxsb_session *ses, struct cryptodesc *maccrd,
160 if ((maccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0)
161 glxsb_hash_key_setup(ses, maccrd->crd_key, maccrd->crd_klen);
163 error = glxsb_authcompute(ses, maccrd, crp->crp_buf, crp->crp_flags);
168 glxsb_hash_free(struct glxsb_session *ses)
171 if (ses->ses_ictx != NULL) {
172 bzero(ses->ses_ictx, ses->ses_axf->ctxsize);
173 kfree(ses->ses_ictx, M_GLXSB);
174 ses->ses_ictx = NULL;
176 if (ses->ses_octx != NULL) {
177 bzero(ses->ses_octx, ses->ses_axf->ctxsize);
178 kfree(ses->ses_octx, M_GLXSB);
179 ses->ses_octx = NULL;