2 * Copyright (c) 2018 Conrad Meyer <cem@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/param.h>
29 #include <sys/kernel.h>
31 #include <sys/malloc.h>
32 #include <sys/module.h>
33 #include <sys/mutex.h>
38 #include <opencrypto/cryptodev.h>
39 #include <cryptodev_if.h>
41 #include <machine/fpu.h>
43 struct blake2_session {
46 CTASSERT((size_t)BLAKE2B_KEYBYTES > (size_t)BLAKE2S_KEYBYTES);
52 static int blake2_cipher_setup(struct blake2_session *ses,
53 const struct crypto_session_params *csp);
54 static int blake2_cipher_process(struct blake2_session *ses,
57 MALLOC_DEFINE(M_BLAKE2, "blake2_data", "Blake2 Data");
60 blake2_identify(driver_t *drv, device_t parent)
63 /* NB: order 10 is so we get attached after h/w devices */
64 if (device_find_child(parent, "blaketwo", -1) == NULL &&
65 BUS_ADD_CHILD(parent, 10, "blaketwo", -1) == 0)
66 panic("blaketwo: could not attach");
70 blake2_probe(device_t dev)
72 device_set_desc(dev, "Blake2");
77 blake2_attach(device_t dev)
79 struct blake2_softc *sc;
81 sc = device_get_softc(dev);
83 sc->cid = crypto_get_driverid(dev, sizeof(struct blake2_session),
84 CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_SYNC |
85 CRYPTOCAP_F_ACCEL_SOFTWARE);
87 device_printf(dev, "Could not get crypto driver id.\n");
95 blake2_detach(device_t dev)
97 struct blake2_softc *sc;
99 sc = device_get_softc(dev);
101 crypto_unregister_all(sc->cid);
107 blake2_probesession(device_t dev, const struct crypto_session_params *csp)
110 if (csp->csp_flags != 0)
112 switch (csp->csp_mode) {
113 case CSP_MODE_DIGEST:
114 switch (csp->csp_auth_alg) {
125 return (CRYPTODEV_PROBE_ACCEL_SOFTWARE);
129 blake2_newsession(device_t dev, crypto_session_t cses,
130 const struct crypto_session_params *csp)
132 struct blake2_session *ses;
135 ses = crypto_get_driver_session(cses);
137 error = blake2_cipher_setup(ses, csp);
139 CRYPTDEB("setup failed");
147 blake2_process(device_t dev, struct cryptop *crp, int hint __unused)
149 struct blake2_session *ses;
152 ses = crypto_get_driver_session(crp->crp_session);
153 error = blake2_cipher_process(ses, crp);
155 crp->crp_etype = error;
160 static device_method_t blake2_methods[] = {
161 DEVMETHOD(device_identify, blake2_identify),
162 DEVMETHOD(device_probe, blake2_probe),
163 DEVMETHOD(device_attach, blake2_attach),
164 DEVMETHOD(device_detach, blake2_detach),
166 DEVMETHOD(cryptodev_probesession, blake2_probesession),
167 DEVMETHOD(cryptodev_newsession, blake2_newsession),
168 DEVMETHOD(cryptodev_process, blake2_process),
173 static driver_t blake2_driver = {
176 sizeof(struct blake2_softc),
179 DRIVER_MODULE(blake2, nexus, blake2_driver, 0, 0);
180 MODULE_VERSION(blake2, 1);
181 MODULE_DEPEND(blake2, crypto, 1, 1, 1);
184 blake2_check_klen(const struct crypto_session_params *csp, unsigned klen)
187 if (csp->csp_auth_alg == CRYPTO_BLAKE2S)
188 return (klen <= BLAKE2S_KEYBYTES);
190 return (klen <= BLAKE2B_KEYBYTES);
194 blake2_cipher_setup(struct blake2_session *ses,
195 const struct crypto_session_params *csp)
199 CTASSERT((size_t)BLAKE2S_OUTBYTES <= (size_t)BLAKE2B_OUTBYTES);
201 if (!blake2_check_klen(csp, csp->csp_auth_klen))
204 if (csp->csp_auth_mlen < 0)
207 switch (csp->csp_auth_alg) {
209 hashlen = BLAKE2S_OUTBYTES;
212 hashlen = BLAKE2B_OUTBYTES;
218 if (csp->csp_auth_mlen > hashlen)
221 if (csp->csp_auth_mlen == 0)
224 ses->mlen = csp->csp_auth_mlen;
229 blake2b_applicator(void *state, const void *buf, u_int len)
233 rc = blake2b_update(state, buf, len);
240 blake2s_applicator(void *state, const void *buf, u_int len)
244 rc = blake2s_update(state, buf, len);
251 blake2_cipher_process(struct blake2_session *ses, struct cryptop *crp)
257 char res[BLAKE2B_OUTBYTES], res2[BLAKE2B_OUTBYTES];
258 const struct crypto_session_params *csp;
263 csp = crypto_get_params(crp->crp_session);
264 if (crp->crp_auth_key != NULL)
265 key = crp->crp_auth_key;
267 key = csp->csp_auth_key;
268 klen = csp->csp_auth_klen;
270 fpu_kern_enter(curthread, NULL, FPU_KERN_NORMAL | FPU_KERN_NOCTX);
272 switch (csp->csp_auth_alg) {
275 rc = blake2b_init_key(&bctx.sb, ses->mlen, key, klen);
277 rc = blake2b_init(&bctx.sb, ses->mlen);
282 error = crypto_apply(crp, crp->crp_payload_start,
283 crp->crp_payload_length, blake2b_applicator, &bctx.sb);
286 rc = blake2b_final(&bctx.sb, res, ses->mlen);
292 rc = blake2s_init_key(&bctx.ss, ses->mlen, key, klen);
294 rc = blake2s_init(&bctx.ss, ses->mlen);
299 error = crypto_apply(crp, crp->crp_payload_start,
300 crp->crp_payload_length, blake2s_applicator, &bctx.ss);
303 rc = blake2s_final(&bctx.ss, res, ses->mlen);
308 __assert_unreachable();
311 fpu_kern_leave(curthread, NULL);
316 if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
317 crypto_copydata(crp, crp->crp_digest_start, ses->mlen, res2);
318 if (timingsafe_bcmp(res, res2, ses->mlen) != 0)
321 crypto_copyback(crp, crp->crp_digest_start, ses->mlen, res);