2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2019 Netflix Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/counter.h>
34 #include <sys/endian.h>
35 #include <sys/kernel.h>
38 #include <sys/malloc.h>
40 #include <sys/module.h>
41 #include <sys/mutex.h>
42 #include <sys/sysctl.h>
46 #include <vm/vm_param.h>
47 #include <opencrypto/cryptodev.h>
48 #include <opencrypto/ktls.h>
50 struct ktls_ocf_session {
52 crypto_session_t mac_sid;
57 /* Only used for TLS 1.0 with the implicit IV. */
62 char iv[AES_BLOCK_LEN];
65 struct ocf_operation {
66 struct ktls_ocf_session *os;
70 static MALLOC_DEFINE(M_KTLS_OCF, "ktls_ocf", "OCF KTLS");
72 SYSCTL_DECL(_kern_ipc_tls);
73 SYSCTL_DECL(_kern_ipc_tls_stats);
75 static SYSCTL_NODE(_kern_ipc_tls_stats, OID_AUTO, ocf,
76 CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
77 "Kernel TLS offload via OCF stats");
79 static COUNTER_U64_DEFINE_EARLY(ocf_tls10_cbc_encrypts);
80 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls10_cbc_encrypts,
81 CTLFLAG_RD, &ocf_tls10_cbc_encrypts,
82 "Total number of OCF TLS 1.0 CBC encryption operations");
84 static COUNTER_U64_DEFINE_EARLY(ocf_tls11_cbc_encrypts);
85 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls11_cbc_encrypts,
86 CTLFLAG_RD, &ocf_tls11_cbc_encrypts,
87 "Total number of OCF TLS 1.1/1.2 CBC encryption operations");
89 static COUNTER_U64_DEFINE_EARLY(ocf_tls12_gcm_decrypts);
90 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls12_gcm_decrypts,
91 CTLFLAG_RD, &ocf_tls12_gcm_decrypts,
92 "Total number of OCF TLS 1.2 GCM decryption operations");
94 static COUNTER_U64_DEFINE_EARLY(ocf_tls12_gcm_encrypts);
95 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls12_gcm_encrypts,
96 CTLFLAG_RD, &ocf_tls12_gcm_encrypts,
97 "Total number of OCF TLS 1.2 GCM encryption operations");
99 static COUNTER_U64_DEFINE_EARLY(ocf_tls12_chacha20_decrypts);
100 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls12_chacha20_decrypts,
101 CTLFLAG_RD, &ocf_tls12_chacha20_decrypts,
102 "Total number of OCF TLS 1.2 Chacha20-Poly1305 decryption operations");
104 static COUNTER_U64_DEFINE_EARLY(ocf_tls12_chacha20_encrypts);
105 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls12_chacha20_encrypts,
106 CTLFLAG_RD, &ocf_tls12_chacha20_encrypts,
107 "Total number of OCF TLS 1.2 Chacha20-Poly1305 encryption operations");
109 static COUNTER_U64_DEFINE_EARLY(ocf_tls13_gcm_encrypts);
110 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls13_gcm_encrypts,
111 CTLFLAG_RD, &ocf_tls13_gcm_encrypts,
112 "Total number of OCF TLS 1.3 GCM encryption operations");
114 static COUNTER_U64_DEFINE_EARLY(ocf_tls13_chacha20_encrypts);
115 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, tls13_chacha20_encrypts,
116 CTLFLAG_RD, &ocf_tls13_chacha20_encrypts,
117 "Total number of OCF TLS 1.3 Chacha20-Poly1305 encryption operations");
119 static COUNTER_U64_DEFINE_EARLY(ocf_inplace);
120 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, inplace,
121 CTLFLAG_RD, &ocf_inplace,
122 "Total number of OCF in-place operations");
124 static COUNTER_U64_DEFINE_EARLY(ocf_separate_output);
125 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, separate_output,
126 CTLFLAG_RD, &ocf_separate_output,
127 "Total number of OCF operations with a separate output buffer");
129 static COUNTER_U64_DEFINE_EARLY(ocf_retries);
130 SYSCTL_COUNTER_U64(_kern_ipc_tls_stats_ocf, OID_AUTO, retries, CTLFLAG_RD,
132 "Number of OCF encryption operation retries");
135 ktls_ocf_callback_sync(struct cryptop *crp __unused)
141 ktls_ocf_callback_async(struct cryptop *crp)
143 struct ocf_operation *oo;
145 oo = crp->crp_opaque;
146 mtx_lock(&oo->os->lock);
148 mtx_unlock(&oo->os->lock);
154 ktls_ocf_dispatch(struct ktls_ocf_session *os, struct cryptop *crp)
156 struct ocf_operation oo;
163 crp->crp_opaque = &oo;
165 async = !CRYPTO_SESS_SYNC(crp->crp_session);
166 crp->crp_callback = async ? ktls_ocf_callback_async :
167 ktls_ocf_callback_sync;
169 error = crypto_dispatch(crp);
175 mtx_sleep(&oo, &os->lock, 0, "ocfktls", 0);
176 mtx_unlock(&os->lock);
179 if (crp->crp_etype != EAGAIN) {
180 error = crp->crp_etype;
185 crp->crp_flags &= ~CRYPTO_F_DONE;
187 counter_u64_add(ocf_retries, 1);
193 ktls_ocf_dispatch_async_cb(struct cryptop *crp)
195 struct ktls_ocf_encrypt_state *state;
198 state = crp->crp_opaque;
199 if (crp->crp_etype == EAGAIN) {
201 crp->crp_flags &= ~CRYPTO_F_DONE;
202 counter_u64_add(ocf_retries, 1);
203 error = crypto_dispatch(crp);
205 crypto_destroyreq(crp);
206 ktls_encrypt_cb(state, error);
211 error = crp->crp_etype;
212 crypto_destroyreq(crp);
213 ktls_encrypt_cb(state, error);
218 ktls_ocf_dispatch_async(struct ktls_ocf_encrypt_state *state,
223 crp->crp_opaque = state;
224 crp->crp_callback = ktls_ocf_dispatch_async_cb;
225 error = crypto_dispatch(crp);
227 crypto_destroyreq(crp);
232 ktls_ocf_tls_cbc_encrypt(struct ktls_ocf_encrypt_state *state,
233 struct ktls_session *tls, struct mbuf *m, struct iovec *outiov,
236 const struct tls_record_layer *hdr;
238 struct tls_mac_data *ad;
240 struct ktls_ocf_session *os;
241 struct iovec iov[m->m_epg_npgs + 2];
244 uint16_t tls_comp_len;
247 MPASS(outiovcnt + 1 <= nitems(iov));
249 os = tls->ocf_session;
250 hdr = (const struct tls_record_layer *)m->m_epg_hdr;
253 MPASS(tls->sync_dispatch);
256 if (os->implicit_iv) {
258 KASSERT(!os->in_progress,
259 ("concurrent implicit IV encryptions"));
260 if (os->next_seqno != m->m_epg_seqno) {
261 printf("KTLS CBC: TLS records out of order. "
262 "Expected %ju, got %ju\n",
263 (uintmax_t)os->next_seqno,
264 (uintmax_t)m->m_epg_seqno);
265 mtx_unlock(&os->lock);
268 os->in_progress = true;
269 mtx_unlock(&os->lock);
273 /* Payload length. */
274 tls_comp_len = m->m_len - (m->m_epg_hdrlen + m->m_epg_trllen);
276 /* Initialize the AAD. */
278 ad->seq = htobe64(m->m_epg_seqno);
279 ad->type = hdr->tls_type;
280 ad->tls_vmajor = hdr->tls_vmajor;
281 ad->tls_vminor = hdr->tls_vminor;
282 ad->tls_length = htons(tls_comp_len);
284 /* First, compute the MAC. */
285 iov[0].iov_base = ad;
286 iov[0].iov_len = sizeof(*ad);
287 pgoff = m->m_epg_1st_off;
288 for (i = 0; i < m->m_epg_npgs; i++, pgoff = 0) {
289 iov[i + 1].iov_base = (void *)PHYS_TO_DMAP(m->m_epg_pa[i] +
291 iov[i + 1].iov_len = m_epg_pagelen(m, i, pgoff);
293 iov[m->m_epg_npgs + 1].iov_base = m->m_epg_trail;
294 iov[m->m_epg_npgs + 1].iov_len = os->mac_len;
296 uio->uio_iovcnt = m->m_epg_npgs + 2;
298 uio->uio_segflg = UIO_SYSSPACE;
299 uio->uio_td = curthread;
300 uio->uio_resid = sizeof(*ad) + tls_comp_len + os->mac_len;
302 crypto_initreq(crp, os->mac_sid);
303 crp->crp_payload_start = 0;
304 crp->crp_payload_length = sizeof(*ad) + tls_comp_len;
305 crp->crp_digest_start = crp->crp_payload_length;
306 crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
307 crp->crp_flags = CRYPTO_F_CBIMM;
308 crypto_use_uio(crp, uio);
309 error = ktls_ocf_dispatch(os, crp);
311 crypto_destroyreq(crp);
314 if (os->implicit_iv) {
316 os->in_progress = false;
317 mtx_unlock(&os->lock);
323 /* Second, add the padding. */
324 pad = m->m_epg_trllen - os->mac_len - 1;
325 for (i = 0; i < pad + 1; i++)
326 m->m_epg_trail[os->mac_len + i] = pad;
328 /* Finally, encrypt the record. */
329 crypto_initreq(crp, os->sid);
330 crp->crp_payload_start = m->m_epg_hdrlen;
331 crp->crp_payload_length = tls_comp_len + m->m_epg_trllen;
332 KASSERT(crp->crp_payload_length % AES_BLOCK_LEN == 0,
333 ("invalid encryption size"));
334 crypto_use_single_mbuf(crp, m);
335 crp->crp_op = CRYPTO_OP_ENCRYPT;
336 crp->crp_flags = CRYPTO_F_CBIMM | CRYPTO_F_IV_SEPARATE;
338 memcpy(crp->crp_iv, os->iv, AES_BLOCK_LEN);
340 memcpy(crp->crp_iv, hdr + 1, AES_BLOCK_LEN);
342 if (outiov != NULL) {
343 uio->uio_iov = outiov;
344 uio->uio_iovcnt = outiovcnt;
346 uio->uio_segflg = UIO_SYSSPACE;
347 uio->uio_td = curthread;
348 uio->uio_resid = crp->crp_payload_length;
349 crypto_use_output_uio(crp, uio);
353 counter_u64_add(ocf_tls10_cbc_encrypts, 1);
355 counter_u64_add(ocf_tls11_cbc_encrypts, 1);
357 counter_u64_add(ocf_separate_output, 1);
359 counter_u64_add(ocf_inplace, 1);
360 error = ktls_ocf_dispatch(os, crp);
362 crypto_destroyreq(crp);
364 if (os->implicit_iv) {
365 KASSERT(os->mac_len + pad + 1 >= AES_BLOCK_LEN,
366 ("trailer too short to read IV"));
367 memcpy(os->iv, m->m_epg_trail + m->m_epg_trllen - AES_BLOCK_LEN,
371 os->next_seqno = m->m_epg_seqno + 1;
372 os->in_progress = false;
373 mtx_unlock(&os->lock);
380 ktls_ocf_tls12_aead_encrypt(struct ktls_ocf_encrypt_state *state,
381 struct ktls_session *tls, struct mbuf *m, struct iovec *outiov,
384 const struct tls_record_layer *hdr;
386 struct tls_aead_data *ad;
388 struct ktls_ocf_session *os;
390 uint16_t tls_comp_len;
392 os = tls->ocf_session;
393 hdr = (const struct tls_record_layer *)m->m_epg_hdr;
397 crypto_initreq(crp, os->sid);
400 if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16) {
401 memcpy(crp->crp_iv, tls->params.iv, TLS_AEAD_GCM_LEN);
402 memcpy(crp->crp_iv + TLS_AEAD_GCM_LEN, hdr + 1,
406 * Chacha20-Poly1305 constructs the IV for TLS 1.2
407 * identically to constructing the IV for AEAD in TLS
410 memcpy(crp->crp_iv, tls->params.iv, tls->params.iv_len);
411 *(uint64_t *)(crp->crp_iv + 4) ^= htobe64(m->m_epg_seqno);
416 tls_comp_len = m->m_len - (m->m_epg_hdrlen + m->m_epg_trllen);
417 ad->seq = htobe64(m->m_epg_seqno);
418 ad->type = hdr->tls_type;
419 ad->tls_vmajor = hdr->tls_vmajor;
420 ad->tls_vminor = hdr->tls_vminor;
421 ad->tls_length = htons(tls_comp_len);
423 crp->crp_aad_length = sizeof(*ad);
425 /* Set fields for input payload. */
426 crypto_use_single_mbuf(crp, m);
427 crp->crp_payload_start = m->m_epg_hdrlen;
428 crp->crp_payload_length = tls_comp_len;
430 if (outiov != NULL) {
431 crp->crp_digest_start = crp->crp_payload_length;
433 uio->uio_iov = outiov;
434 uio->uio_iovcnt = outiovcnt;
436 uio->uio_segflg = UIO_SYSSPACE;
437 uio->uio_td = curthread;
438 uio->uio_resid = crp->crp_payload_length + tls->params.tls_tlen;
439 crypto_use_output_uio(crp, uio);
441 crp->crp_digest_start = crp->crp_payload_start +
442 crp->crp_payload_length;
444 crp->crp_op = CRYPTO_OP_ENCRYPT | CRYPTO_OP_COMPUTE_DIGEST;
445 crp->crp_flags = CRYPTO_F_CBIMM | CRYPTO_F_IV_SEPARATE;
446 if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16)
447 counter_u64_add(ocf_tls12_gcm_encrypts, 1);
449 counter_u64_add(ocf_tls12_chacha20_encrypts, 1);
451 counter_u64_add(ocf_separate_output, 1);
453 counter_u64_add(ocf_inplace, 1);
454 if (tls->sync_dispatch) {
455 error = ktls_ocf_dispatch(os, crp);
456 crypto_destroyreq(crp);
458 error = ktls_ocf_dispatch_async(state, crp);
463 ktls_ocf_tls12_aead_decrypt(struct ktls_session *tls,
464 const struct tls_record_layer *hdr, struct mbuf *m, uint64_t seqno,
467 struct tls_aead_data ad;
469 struct ktls_ocf_session *os;
471 uint16_t tls_comp_len;
473 os = tls->ocf_session;
475 crypto_initreq(&crp, os->sid);
478 if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16) {
479 memcpy(crp.crp_iv, tls->params.iv, TLS_AEAD_GCM_LEN);
480 memcpy(crp.crp_iv + TLS_AEAD_GCM_LEN, hdr + 1,
484 * Chacha20-Poly1305 constructs the IV for TLS 1.2
485 * identically to constructing the IV for AEAD in TLS
488 memcpy(crp.crp_iv, tls->params.iv, tls->params.iv_len);
489 *(uint64_t *)(crp.crp_iv + 4) ^= htobe64(seqno);
493 if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16)
494 tls_comp_len = ntohs(hdr->tls_length) -
495 (AES_GMAC_HASH_LEN + sizeof(uint64_t));
497 tls_comp_len = ntohs(hdr->tls_length) - POLY1305_HASH_LEN;
498 ad.seq = htobe64(seqno);
499 ad.type = hdr->tls_type;
500 ad.tls_vmajor = hdr->tls_vmajor;
501 ad.tls_vminor = hdr->tls_vminor;
502 ad.tls_length = htons(tls_comp_len);
504 crp.crp_aad_length = sizeof(ad);
506 crp.crp_payload_start = tls->params.tls_hlen;
507 crp.crp_payload_length = tls_comp_len;
508 crp.crp_digest_start = crp.crp_payload_start + crp.crp_payload_length;
510 crp.crp_op = CRYPTO_OP_DECRYPT | CRYPTO_OP_VERIFY_DIGEST;
511 crp.crp_flags = CRYPTO_F_CBIMM | CRYPTO_F_IV_SEPARATE;
512 crypto_use_mbuf(&crp, m);
514 if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16)
515 counter_u64_add(ocf_tls12_gcm_decrypts, 1);
517 counter_u64_add(ocf_tls12_chacha20_decrypts, 1);
518 error = ktls_ocf_dispatch(os, &crp);
520 crypto_destroyreq(&crp);
521 *trailer_len = tls->params.tls_tlen;
526 ktls_ocf_tls13_aead_encrypt(struct ktls_ocf_encrypt_state *state,
527 struct ktls_session *tls, struct mbuf *m, struct iovec *outiov,
530 const struct tls_record_layer *hdr;
532 struct tls_aead_data_13 *ad;
534 struct ktls_ocf_session *os;
538 os = tls->ocf_session;
539 hdr = (const struct tls_record_layer *)m->m_epg_hdr;
543 crypto_initreq(crp, os->sid);
545 /* Setup the nonce. */
546 memcpy(nonce, tls->params.iv, tls->params.iv_len);
547 *(uint64_t *)(nonce + 4) ^= htobe64(m->m_epg_seqno);
551 ad->type = hdr->tls_type;
552 ad->tls_vmajor = hdr->tls_vmajor;
553 ad->tls_vminor = hdr->tls_vminor;
554 ad->tls_length = hdr->tls_length;
556 crp->crp_aad_length = sizeof(*ad);
558 /* Set fields for input payload. */
559 crypto_use_single_mbuf(crp, m);
560 crp->crp_payload_start = m->m_epg_hdrlen;
561 crp->crp_payload_length = m->m_len -
562 (m->m_epg_hdrlen + m->m_epg_trllen);
564 /* Store the record type as the first byte of the trailer. */
565 m->m_epg_trail[0] = m->m_epg_record_type;
566 crp->crp_payload_length++;
568 if (outiov != NULL) {
569 crp->crp_digest_start = crp->crp_payload_length;
571 uio->uio_iov = outiov;
572 uio->uio_iovcnt = outiovcnt;
574 uio->uio_segflg = UIO_SYSSPACE;
575 uio->uio_td = curthread;
576 uio->uio_resid = m->m_len - m->m_epg_hdrlen;
577 crypto_use_output_uio(crp, uio);
579 crp->crp_digest_start = crp->crp_payload_start +
580 crp->crp_payload_length;
582 crp->crp_op = CRYPTO_OP_ENCRYPT | CRYPTO_OP_COMPUTE_DIGEST;
583 crp->crp_flags = CRYPTO_F_CBIMM | CRYPTO_F_IV_SEPARATE;
585 memcpy(crp->crp_iv, nonce, sizeof(nonce));
587 if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16)
588 counter_u64_add(ocf_tls13_gcm_encrypts, 1);
590 counter_u64_add(ocf_tls13_chacha20_encrypts, 1);
592 counter_u64_add(ocf_separate_output, 1);
594 counter_u64_add(ocf_inplace, 1);
595 if (tls->sync_dispatch) {
596 error = ktls_ocf_dispatch(os, crp);
597 crypto_destroyreq(crp);
599 error = ktls_ocf_dispatch_async(state, crp);
604 ktls_ocf_free(struct ktls_session *tls)
606 struct ktls_ocf_session *os;
608 os = tls->ocf_session;
609 crypto_freesession(os->sid);
610 mtx_destroy(&os->lock);
611 zfree(os, M_KTLS_OCF);
615 ktls_ocf_try(struct socket *so, struct ktls_session *tls, int direction)
617 struct crypto_session_params csp, mac_csp;
618 struct ktls_ocf_session *os;
621 memset(&csp, 0, sizeof(csp));
622 memset(&mac_csp, 0, sizeof(mac_csp));
623 mac_csp.csp_mode = CSP_MODE_NONE;
626 switch (tls->params.cipher_algorithm) {
627 case CRYPTO_AES_NIST_GCM_16:
628 switch (tls->params.cipher_key_len) {
636 /* Only TLS 1.2 and 1.3 are supported. */
637 if (tls->params.tls_vmajor != TLS_MAJOR_VER_ONE ||
638 tls->params.tls_vminor < TLS_MINOR_VER_TWO ||
639 tls->params.tls_vminor > TLS_MINOR_VER_THREE)
640 return (EPROTONOSUPPORT);
642 /* TLS 1.3 is not yet supported for receive. */
643 if (direction == KTLS_RX &&
644 tls->params.tls_vminor == TLS_MINOR_VER_THREE)
645 return (EPROTONOSUPPORT);
647 csp.csp_flags |= CSP_F_SEPARATE_OUTPUT | CSP_F_SEPARATE_AAD;
648 csp.csp_mode = CSP_MODE_AEAD;
649 csp.csp_cipher_alg = CRYPTO_AES_NIST_GCM_16;
650 csp.csp_cipher_key = tls->params.cipher_key;
651 csp.csp_cipher_klen = tls->params.cipher_key_len;
652 csp.csp_ivlen = AES_GCM_IV_LEN;
655 switch (tls->params.cipher_key_len) {
663 switch (tls->params.auth_algorithm) {
664 case CRYPTO_SHA1_HMAC:
665 mac_len = SHA1_HASH_LEN;
667 case CRYPTO_SHA2_256_HMAC:
668 mac_len = SHA2_256_HASH_LEN;
670 case CRYPTO_SHA2_384_HMAC:
671 mac_len = SHA2_384_HASH_LEN;
677 /* Only TLS 1.0-1.2 are supported. */
678 if (tls->params.tls_vmajor != TLS_MAJOR_VER_ONE ||
679 tls->params.tls_vminor < TLS_MINOR_VER_ZERO ||
680 tls->params.tls_vminor > TLS_MINOR_VER_TWO)
681 return (EPROTONOSUPPORT);
683 /* AES-CBC is not supported for receive. */
684 if (direction == KTLS_RX)
685 return (EPROTONOSUPPORT);
687 csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
688 csp.csp_mode = CSP_MODE_CIPHER;
689 csp.csp_cipher_alg = CRYPTO_AES_CBC;
690 csp.csp_cipher_key = tls->params.cipher_key;
691 csp.csp_cipher_klen = tls->params.cipher_key_len;
692 csp.csp_ivlen = AES_BLOCK_LEN;
694 mac_csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
695 mac_csp.csp_mode = CSP_MODE_DIGEST;
696 mac_csp.csp_auth_alg = tls->params.auth_algorithm;
697 mac_csp.csp_auth_key = tls->params.auth_key;
698 mac_csp.csp_auth_klen = tls->params.auth_key_len;
700 case CRYPTO_CHACHA20_POLY1305:
701 switch (tls->params.cipher_key_len) {
708 /* Only TLS 1.2 and 1.3 are supported. */
709 if (tls->params.tls_vmajor != TLS_MAJOR_VER_ONE ||
710 tls->params.tls_vminor < TLS_MINOR_VER_TWO ||
711 tls->params.tls_vminor > TLS_MINOR_VER_THREE)
712 return (EPROTONOSUPPORT);
714 /* TLS 1.3 is not yet supported for receive. */
715 if (direction == KTLS_RX &&
716 tls->params.tls_vminor == TLS_MINOR_VER_THREE)
717 return (EPROTONOSUPPORT);
719 csp.csp_flags |= CSP_F_SEPARATE_OUTPUT | CSP_F_SEPARATE_AAD;
720 csp.csp_mode = CSP_MODE_AEAD;
721 csp.csp_cipher_alg = CRYPTO_CHACHA20_POLY1305;
722 csp.csp_cipher_key = tls->params.cipher_key;
723 csp.csp_cipher_klen = tls->params.cipher_key_len;
724 csp.csp_ivlen = CHACHA20_POLY1305_IV_LEN;
727 return (EPROTONOSUPPORT);
730 os = malloc(sizeof(*os), M_KTLS_OCF, M_NOWAIT | M_ZERO);
734 error = crypto_newsession(&os->sid, &csp,
735 CRYPTO_FLAG_HARDWARE | CRYPTO_FLAG_SOFTWARE);
737 free(os, M_KTLS_OCF);
741 if (mac_csp.csp_mode != CSP_MODE_NONE) {
742 error = crypto_newsession(&os->mac_sid, &mac_csp,
743 CRYPTO_FLAG_HARDWARE | CRYPTO_FLAG_SOFTWARE);
745 crypto_freesession(os->sid);
746 free(os, M_KTLS_OCF);
749 os->mac_len = mac_len;
752 mtx_init(&os->lock, "ktls_ocf", NULL, MTX_DEF);
753 tls->ocf_session = os;
754 if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16 ||
755 tls->params.cipher_algorithm == CRYPTO_CHACHA20_POLY1305) {
756 if (direction == KTLS_TX) {
757 if (tls->params.tls_vminor == TLS_MINOR_VER_THREE)
758 tls->sw_encrypt = ktls_ocf_tls13_aead_encrypt;
760 tls->sw_encrypt = ktls_ocf_tls12_aead_encrypt;
762 tls->sw_decrypt = ktls_ocf_tls12_aead_decrypt;
765 tls->sw_encrypt = ktls_ocf_tls_cbc_encrypt;
766 if (tls->params.tls_vminor == TLS_MINOR_VER_ZERO) {
767 os->implicit_iv = true;
768 memcpy(os->iv, tls->params.iv, AES_BLOCK_LEN);
770 os->next_seqno = tls->next_seqno;
776 * AES-CBC is always synchronous currently. Asynchronous
777 * operation would require multiple callbacks and an additional
778 * iovec array in ktls_ocf_encrypt_state.
780 tls->sync_dispatch = CRYPTO_SESS_SYNC(os->sid) ||
781 tls->params.cipher_algorithm == CRYPTO_AES_CBC;