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3c4d7559 DW |
1 | /* |
2 | * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved. | |
3 | * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved. | |
4 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | #include <linux/module.h> | |
35 | ||
36 | #include <net/tcp.h> | |
37 | #include <net/inet_common.h> | |
38 | #include <linux/highmem.h> | |
39 | #include <linux/netdevice.h> | |
40 | #include <linux/sched/signal.h> | |
dd0bed16 | 41 | #include <linux/inetdevice.h> |
26811cc9 | 42 | #include <linux/inet_diag.h> |
3c4d7559 | 43 | |
d26b698d | 44 | #include <net/snmp.h> |
3c4d7559 | 45 | #include <net/tls.h> |
25a3cd81 | 46 | #include <net/tls_toe.h> |
3c4d7559 | 47 | |
58790314 JK |
48 | #include "tls.h" |
49 | ||
3c4d7559 DW |
50 | MODULE_AUTHOR("Mellanox Technologies"); |
51 | MODULE_DESCRIPTION("Transport Layer Security Support"); | |
52 | MODULE_LICENSE("Dual BSD/GPL"); | |
037b0b86 | 53 | MODULE_ALIAS_TCP_ULP("tls"); |
3c4d7559 | 54 | |
c113187d BP |
55 | enum { |
56 | TLSV4, | |
57 | TLSV6, | |
58 | TLS_NUM_PROTS, | |
59 | }; | |
6d88207f | 60 | |
2d2c5ea2 TT |
61 | #define CIPHER_SIZE_DESC(cipher) [cipher] = { \ |
62 | .iv = cipher ## _IV_SIZE, \ | |
63 | .key = cipher ## _KEY_SIZE, \ | |
64 | .salt = cipher ## _SALT_SIZE, \ | |
65 | .tag = cipher ## _TAG_SIZE, \ | |
66 | .rec_seq = cipher ## _REC_SEQ_SIZE, \ | |
67 | } | |
68 | ||
69 | const struct tls_cipher_size_desc tls_cipher_size_desc[] = { | |
70 | CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_128), | |
71 | CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_256), | |
72 | CIPHER_SIZE_DESC(TLS_CIPHER_AES_CCM_128), | |
73 | CIPHER_SIZE_DESC(TLS_CIPHER_CHACHA20_POLY1305), | |
74 | CIPHER_SIZE_DESC(TLS_CIPHER_SM4_GCM), | |
75 | CIPHER_SIZE_DESC(TLS_CIPHER_SM4_CCM), | |
76 | }; | |
77 | ||
f691a25c | 78 | static const struct proto *saved_tcpv6_prot; |
c113187d | 79 | static DEFINE_MUTEX(tcpv6_prot_mutex); |
f691a25c | 80 | static const struct proto *saved_tcpv4_prot; |
28cb6f1e | 81 | static DEFINE_MUTEX(tcpv4_prot_mutex); |
f66de3ee | 82 | static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; |
f3911f73 | 83 | static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; |
63a6b3fe | 84 | static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
f13fe3e6 | 85 | const struct proto *base); |
6d88207f | 86 | |
08700dab | 87 | void update_sk_prot(struct sock *sk, struct tls_context *ctx) |
6d88207f | 88 | { |
c113187d BP |
89 | int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; |
90 | ||
d5bee737 JS |
91 | WRITE_ONCE(sk->sk_prot, |
92 | &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]); | |
f3911f73 JK |
93 | WRITE_ONCE(sk->sk_socket->ops, |
94 | &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]); | |
6d88207f | 95 | } |
3c4d7559 DW |
96 | |
97 | int wait_on_pending_writer(struct sock *sk, long *timeo) | |
98 | { | |
99 | int rc = 0; | |
100 | DEFINE_WAIT_FUNC(wait, woken_wake_function); | |
101 | ||
102 | add_wait_queue(sk_sleep(sk), &wait); | |
103 | while (1) { | |
104 | if (!*timeo) { | |
105 | rc = -EAGAIN; | |
106 | break; | |
107 | } | |
108 | ||
109 | if (signal_pending(current)) { | |
110 | rc = sock_intr_errno(*timeo); | |
111 | break; | |
112 | } | |
113 | ||
114 | if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) | |
115 | break; | |
116 | } | |
117 | remove_wait_queue(sk_sleep(sk), &wait); | |
118 | return rc; | |
119 | } | |
120 | ||
121 | int tls_push_sg(struct sock *sk, | |
122 | struct tls_context *ctx, | |
123 | struct scatterlist *sg, | |
124 | u16 first_offset, | |
125 | int flags) | |
126 | { | |
127 | int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; | |
128 | int ret = 0; | |
129 | struct page *p; | |
130 | size_t size; | |
131 | int offset = first_offset; | |
132 | ||
133 | size = sg->length - offset; | |
134 | offset += sg->offset; | |
135 | ||
c212d2c7 | 136 | ctx->in_tcp_sendpages = true; |
3c4d7559 DW |
137 | while (1) { |
138 | if (sg_is_last(sg)) | |
139 | sendpage_flags = flags; | |
140 | ||
141 | /* is sending application-limited? */ | |
142 | tcp_rate_check_app_limited(sk); | |
143 | p = sg_page(sg); | |
144 | retry: | |
145 | ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); | |
146 | ||
147 | if (ret != size) { | |
148 | if (ret > 0) { | |
149 | offset += ret; | |
150 | size -= ret; | |
151 | goto retry; | |
152 | } | |
153 | ||
154 | offset -= sg->offset; | |
155 | ctx->partially_sent_offset = offset; | |
156 | ctx->partially_sent_record = (void *)sg; | |
080324c3 | 157 | ctx->in_tcp_sendpages = false; |
3c4d7559 DW |
158 | return ret; |
159 | } | |
160 | ||
161 | put_page(p); | |
162 | sk_mem_uncharge(sk, sg->length); | |
163 | sg = sg_next(sg); | |
164 | if (!sg) | |
165 | break; | |
166 | ||
167 | offset = sg->offset; | |
168 | size = sg->length; | |
169 | } | |
170 | ||
c212d2c7 | 171 | ctx->in_tcp_sendpages = false; |
3c4d7559 DW |
172 | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static int tls_handle_open_record(struct sock *sk, int flags) | |
177 | { | |
178 | struct tls_context *ctx = tls_get_ctx(sk); | |
179 | ||
180 | if (tls_is_pending_open_record(ctx)) | |
181 | return ctx->push_pending_record(sk, flags); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
58790314 JK |
186 | int tls_process_cmsg(struct sock *sk, struct msghdr *msg, |
187 | unsigned char *record_type) | |
3c4d7559 DW |
188 | { |
189 | struct cmsghdr *cmsg; | |
190 | int rc = -EINVAL; | |
191 | ||
192 | for_each_cmsghdr(cmsg, msg) { | |
193 | if (!CMSG_OK(msg, cmsg)) | |
194 | return -EINVAL; | |
195 | if (cmsg->cmsg_level != SOL_TLS) | |
196 | continue; | |
197 | ||
198 | switch (cmsg->cmsg_type) { | |
199 | case TLS_SET_RECORD_TYPE: | |
200 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) | |
201 | return -EINVAL; | |
202 | ||
203 | if (msg->msg_flags & MSG_MORE) | |
204 | return -EINVAL; | |
205 | ||
206 | rc = tls_handle_open_record(sk, msg->msg_flags); | |
207 | if (rc) | |
208 | return rc; | |
209 | ||
210 | *record_type = *(unsigned char *)CMSG_DATA(cmsg); | |
211 | rc = 0; | |
212 | break; | |
213 | default: | |
214 | return -EINVAL; | |
215 | } | |
216 | } | |
217 | ||
218 | return rc; | |
219 | } | |
220 | ||
a42055e8 VG |
221 | int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
222 | int flags) | |
3c4d7559 DW |
223 | { |
224 | struct scatterlist *sg; | |
225 | u16 offset; | |
226 | ||
3c4d7559 DW |
227 | sg = ctx->partially_sent_record; |
228 | offset = ctx->partially_sent_offset; | |
229 | ||
230 | ctx->partially_sent_record = NULL; | |
231 | return tls_push_sg(sk, ctx, sg, offset, flags); | |
232 | } | |
233 | ||
c5daa6cc | 234 | void tls_free_partial_record(struct sock *sk, struct tls_context *ctx) |
35b71a34 JK |
235 | { |
236 | struct scatterlist *sg; | |
237 | ||
c5daa6cc | 238 | for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) { |
35b71a34 JK |
239 | put_page(sg_page(sg)); |
240 | sk_mem_uncharge(sk, sg->length); | |
35b71a34 JK |
241 | } |
242 | ctx->partially_sent_record = NULL; | |
35b71a34 JK |
243 | } |
244 | ||
3c4d7559 DW |
245 | static void tls_write_space(struct sock *sk) |
246 | { | |
247 | struct tls_context *ctx = tls_get_ctx(sk); | |
248 | ||
67db7cd2 JF |
249 | /* If in_tcp_sendpages call lower protocol write space handler |
250 | * to ensure we wake up any waiting operations there. For example | |
251 | * if do_tcp_sendpages where to call sk_wait_event. | |
252 | */ | |
253 | if (ctx->in_tcp_sendpages) { | |
254 | ctx->sk_write_space(sk); | |
c212d2c7 | 255 | return; |
67db7cd2 | 256 | } |
c212d2c7 | 257 | |
7463d3a2 BP |
258 | #ifdef CONFIG_TLS_DEVICE |
259 | if (ctx->tx_conf == TLS_HW) | |
260 | tls_device_write_space(sk, ctx); | |
261 | else | |
262 | #endif | |
263 | tls_sw_write_space(sk, ctx); | |
4504ab0e VG |
264 | |
265 | ctx->sk_write_space(sk); | |
3c4d7559 DW |
266 | } |
267 | ||
15a7dea7 JK |
268 | /** |
269 | * tls_ctx_free() - free TLS ULP context | |
270 | * @sk: socket to with @ctx is attached | |
271 | * @ctx: TLS context structure | |
272 | * | |
273 | * Free TLS context. If @sk is %NULL caller guarantees that the socket | |
274 | * to which @ctx was attached has no outstanding references. | |
275 | */ | |
276 | void tls_ctx_free(struct sock *sk, struct tls_context *ctx) | |
86029d10 SD |
277 | { |
278 | if (!ctx) | |
279 | return; | |
280 | ||
281 | memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); | |
282 | memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); | |
79ffe608 | 283 | mutex_destroy(&ctx->tx_lock); |
15a7dea7 JK |
284 | |
285 | if (sk) | |
286 | kfree_rcu(ctx, rcu); | |
287 | else | |
288 | kfree(ctx); | |
86029d10 SD |
289 | } |
290 | ||
313ab004 JF |
291 | static void tls_sk_proto_cleanup(struct sock *sk, |
292 | struct tls_context *ctx, long timeo) | |
3c4d7559 | 293 | { |
9354544c DM |
294 | if (unlikely(sk->sk_write_pending) && |
295 | !wait_on_pending_writer(sk, &timeo)) | |
3c4d7559 DW |
296 | tls_handle_open_record(sk, 0); |
297 | ||
f66de3ee BP |
298 | /* We need these for tls_sw_fallback handling of other packets */ |
299 | if (ctx->tx_conf == TLS_SW) { | |
300 | kfree(ctx->tx.rec_seq); | |
301 | kfree(ctx->tx.iv); | |
313ab004 | 302 | tls_sw_release_resources_tx(sk); |
b32fd3cc | 303 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); |
35b71a34 JK |
304 | } else if (ctx->tx_conf == TLS_HW) { |
305 | tls_device_free_resources_tx(sk); | |
b32fd3cc | 306 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); |
f66de3ee | 307 | } |
3c4d7559 | 308 | |
b32fd3cc | 309 | if (ctx->rx_conf == TLS_SW) { |
313ab004 | 310 | tls_sw_release_resources_rx(sk); |
b32fd3cc JK |
311 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); |
312 | } else if (ctx->rx_conf == TLS_HW) { | |
4799ac81 | 313 | tls_device_offload_cleanup_rx(sk); |
b32fd3cc JK |
314 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); |
315 | } | |
313ab004 JF |
316 | } |
317 | ||
318 | static void tls_sk_proto_close(struct sock *sk, long timeout) | |
319 | { | |
95fa1454 | 320 | struct inet_connection_sock *icsk = inet_csk(sk); |
313ab004 JF |
321 | struct tls_context *ctx = tls_get_ctx(sk); |
322 | long timeo = sock_sndtimeo(sk, 0); | |
323 | bool free_ctx; | |
324 | ||
325 | if (ctx->tx_conf == TLS_SW) | |
326 | tls_sw_cancel_work_tx(ctx); | |
327 | ||
328 | lock_sock(sk); | |
329 | free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW; | |
313ab004 JF |
330 | |
331 | if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE) | |
332 | tls_sk_proto_cleanup(sk, ctx, timeo); | |
e8f69799 | 333 | |
95fa1454 JF |
334 | write_lock_bh(&sk->sk_callback_lock); |
335 | if (free_ctx) | |
15a7dea7 | 336 | rcu_assign_pointer(icsk->icsk_ulp_data, NULL); |
d5bee737 | 337 | WRITE_ONCE(sk->sk_prot, ctx->sk_proto); |
d85f0177 JF |
338 | if (sk->sk_write_space == tls_write_space) |
339 | sk->sk_write_space = ctx->sk_write_space; | |
95fa1454 | 340 | write_unlock_bh(&sk->sk_callback_lock); |
3c4d7559 | 341 | release_sock(sk); |
313ab004 JF |
342 | if (ctx->tx_conf == TLS_SW) |
343 | tls_sw_free_ctx_tx(ctx); | |
344 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) | |
345 | tls_sw_strparser_done(ctx); | |
346 | if (ctx->rx_conf == TLS_SW) | |
347 | tls_sw_free_ctx_rx(ctx); | |
be7bbea1 | 348 | ctx->sk_proto->close(sk, timeout); |
313ab004 | 349 | |
98f0a395 | 350 | if (free_ctx) |
15a7dea7 | 351 | tls_ctx_free(sk, ctx); |
3c4d7559 DW |
352 | } |
353 | ||
ffa81fa4 YH |
354 | static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, |
355 | int __user *optlen, int tx) | |
3c4d7559 DW |
356 | { |
357 | int rc = 0; | |
358 | struct tls_context *ctx = tls_get_ctx(sk); | |
359 | struct tls_crypto_info *crypto_info; | |
ffa81fa4 | 360 | struct cipher_context *cctx; |
3c4d7559 DW |
361 | int len; |
362 | ||
363 | if (get_user(len, optlen)) | |
364 | return -EFAULT; | |
365 | ||
366 | if (!optval || (len < sizeof(*crypto_info))) { | |
367 | rc = -EINVAL; | |
368 | goto out; | |
369 | } | |
370 | ||
371 | if (!ctx) { | |
372 | rc = -EBUSY; | |
373 | goto out; | |
374 | } | |
375 | ||
376 | /* get user crypto info */ | |
ffa81fa4 YH |
377 | if (tx) { |
378 | crypto_info = &ctx->crypto_send.info; | |
379 | cctx = &ctx->tx; | |
380 | } else { | |
381 | crypto_info = &ctx->crypto_recv.info; | |
382 | cctx = &ctx->rx; | |
383 | } | |
3c4d7559 DW |
384 | |
385 | if (!TLS_CRYPTO_INFO_READY(crypto_info)) { | |
386 | rc = -EBUSY; | |
387 | goto out; | |
388 | } | |
389 | ||
5a3b886c | 390 | if (len == sizeof(*crypto_info)) { |
ac55cd61 DC |
391 | if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) |
392 | rc = -EFAULT; | |
3c4d7559 DW |
393 | goto out; |
394 | } | |
395 | ||
396 | switch (crypto_info->cipher_type) { | |
397 | case TLS_CIPHER_AES_GCM_128: { | |
398 | struct tls12_crypto_info_aes_gcm_128 * | |
399 | crypto_info_aes_gcm_128 = | |
400 | container_of(crypto_info, | |
401 | struct tls12_crypto_info_aes_gcm_128, | |
402 | info); | |
403 | ||
404 | if (len != sizeof(*crypto_info_aes_gcm_128)) { | |
405 | rc = -EINVAL; | |
406 | goto out; | |
407 | } | |
408 | lock_sock(sk); | |
a1dfa681 | 409 | memcpy(crypto_info_aes_gcm_128->iv, |
ffa81fa4 | 410 | cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, |
3c4d7559 | 411 | TLS_CIPHER_AES_GCM_128_IV_SIZE); |
ffa81fa4 | 412 | memcpy(crypto_info_aes_gcm_128->rec_seq, cctx->rec_seq, |
c410c196 | 413 | TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); |
3c4d7559 | 414 | release_sock(sk); |
ac55cd61 DC |
415 | if (copy_to_user(optval, |
416 | crypto_info_aes_gcm_128, | |
417 | sizeof(*crypto_info_aes_gcm_128))) | |
418 | rc = -EFAULT; | |
3c4d7559 DW |
419 | break; |
420 | } | |
fb99bce7 DW |
421 | case TLS_CIPHER_AES_GCM_256: { |
422 | struct tls12_crypto_info_aes_gcm_256 * | |
423 | crypto_info_aes_gcm_256 = | |
424 | container_of(crypto_info, | |
425 | struct tls12_crypto_info_aes_gcm_256, | |
426 | info); | |
427 | ||
428 | if (len != sizeof(*crypto_info_aes_gcm_256)) { | |
429 | rc = -EINVAL; | |
430 | goto out; | |
431 | } | |
432 | lock_sock(sk); | |
433 | memcpy(crypto_info_aes_gcm_256->iv, | |
ffa81fa4 | 434 | cctx->iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, |
fb99bce7 | 435 | TLS_CIPHER_AES_GCM_256_IV_SIZE); |
ffa81fa4 | 436 | memcpy(crypto_info_aes_gcm_256->rec_seq, cctx->rec_seq, |
fb99bce7 DW |
437 | TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); |
438 | release_sock(sk); | |
439 | if (copy_to_user(optval, | |
440 | crypto_info_aes_gcm_256, | |
441 | sizeof(*crypto_info_aes_gcm_256))) | |
442 | rc = -EFAULT; | |
443 | break; | |
444 | } | |
3fb59a5d TZ |
445 | case TLS_CIPHER_AES_CCM_128: { |
446 | struct tls12_crypto_info_aes_ccm_128 *aes_ccm_128 = | |
447 | container_of(crypto_info, | |
448 | struct tls12_crypto_info_aes_ccm_128, info); | |
449 | ||
450 | if (len != sizeof(*aes_ccm_128)) { | |
451 | rc = -EINVAL; | |
452 | goto out; | |
453 | } | |
454 | lock_sock(sk); | |
455 | memcpy(aes_ccm_128->iv, | |
456 | cctx->iv + TLS_CIPHER_AES_CCM_128_SALT_SIZE, | |
457 | TLS_CIPHER_AES_CCM_128_IV_SIZE); | |
458 | memcpy(aes_ccm_128->rec_seq, cctx->rec_seq, | |
459 | TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE); | |
460 | release_sock(sk); | |
461 | if (copy_to_user(optval, aes_ccm_128, sizeof(*aes_ccm_128))) | |
462 | rc = -EFAULT; | |
463 | break; | |
464 | } | |
465 | case TLS_CIPHER_CHACHA20_POLY1305: { | |
466 | struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305 = | |
467 | container_of(crypto_info, | |
468 | struct tls12_crypto_info_chacha20_poly1305, | |
469 | info); | |
470 | ||
471 | if (len != sizeof(*chacha20_poly1305)) { | |
472 | rc = -EINVAL; | |
473 | goto out; | |
474 | } | |
475 | lock_sock(sk); | |
476 | memcpy(chacha20_poly1305->iv, | |
477 | cctx->iv + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE, | |
478 | TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE); | |
479 | memcpy(chacha20_poly1305->rec_seq, cctx->rec_seq, | |
480 | TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE); | |
481 | release_sock(sk); | |
482 | if (copy_to_user(optval, chacha20_poly1305, | |
483 | sizeof(*chacha20_poly1305))) | |
484 | rc = -EFAULT; | |
485 | break; | |
486 | } | |
227b9644 TZ |
487 | case TLS_CIPHER_SM4_GCM: { |
488 | struct tls12_crypto_info_sm4_gcm *sm4_gcm_info = | |
489 | container_of(crypto_info, | |
490 | struct tls12_crypto_info_sm4_gcm, info); | |
491 | ||
492 | if (len != sizeof(*sm4_gcm_info)) { | |
493 | rc = -EINVAL; | |
494 | goto out; | |
495 | } | |
496 | lock_sock(sk); | |
497 | memcpy(sm4_gcm_info->iv, | |
498 | cctx->iv + TLS_CIPHER_SM4_GCM_SALT_SIZE, | |
499 | TLS_CIPHER_SM4_GCM_IV_SIZE); | |
500 | memcpy(sm4_gcm_info->rec_seq, cctx->rec_seq, | |
501 | TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE); | |
502 | release_sock(sk); | |
503 | if (copy_to_user(optval, sm4_gcm_info, sizeof(*sm4_gcm_info))) | |
504 | rc = -EFAULT; | |
505 | break; | |
506 | } | |
507 | case TLS_CIPHER_SM4_CCM: { | |
508 | struct tls12_crypto_info_sm4_ccm *sm4_ccm_info = | |
509 | container_of(crypto_info, | |
510 | struct tls12_crypto_info_sm4_ccm, info); | |
511 | ||
512 | if (len != sizeof(*sm4_ccm_info)) { | |
513 | rc = -EINVAL; | |
514 | goto out; | |
515 | } | |
516 | lock_sock(sk); | |
517 | memcpy(sm4_ccm_info->iv, | |
518 | cctx->iv + TLS_CIPHER_SM4_CCM_SALT_SIZE, | |
519 | TLS_CIPHER_SM4_CCM_IV_SIZE); | |
520 | memcpy(sm4_ccm_info->rec_seq, cctx->rec_seq, | |
521 | TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE); | |
522 | release_sock(sk); | |
523 | if (copy_to_user(optval, sm4_ccm_info, sizeof(*sm4_ccm_info))) | |
524 | rc = -EFAULT; | |
525 | break; | |
526 | } | |
62e56ef5 TY |
527 | case TLS_CIPHER_ARIA_GCM_128: { |
528 | struct tls12_crypto_info_aria_gcm_128 * | |
529 | crypto_info_aria_gcm_128 = | |
530 | container_of(crypto_info, | |
531 | struct tls12_crypto_info_aria_gcm_128, | |
532 | info); | |
533 | ||
534 | if (len != sizeof(*crypto_info_aria_gcm_128)) { | |
535 | rc = -EINVAL; | |
536 | goto out; | |
537 | } | |
538 | lock_sock(sk); | |
539 | memcpy(crypto_info_aria_gcm_128->iv, | |
540 | cctx->iv + TLS_CIPHER_ARIA_GCM_128_SALT_SIZE, | |
541 | TLS_CIPHER_ARIA_GCM_128_IV_SIZE); | |
542 | memcpy(crypto_info_aria_gcm_128->rec_seq, cctx->rec_seq, | |
543 | TLS_CIPHER_ARIA_GCM_128_REC_SEQ_SIZE); | |
544 | release_sock(sk); | |
545 | if (copy_to_user(optval, | |
546 | crypto_info_aria_gcm_128, | |
547 | sizeof(*crypto_info_aria_gcm_128))) | |
548 | rc = -EFAULT; | |
549 | break; | |
550 | } | |
551 | case TLS_CIPHER_ARIA_GCM_256: { | |
552 | struct tls12_crypto_info_aria_gcm_256 * | |
553 | crypto_info_aria_gcm_256 = | |
554 | container_of(crypto_info, | |
555 | struct tls12_crypto_info_aria_gcm_256, | |
556 | info); | |
557 | ||
558 | if (len != sizeof(*crypto_info_aria_gcm_256)) { | |
559 | rc = -EINVAL; | |
560 | goto out; | |
561 | } | |
562 | lock_sock(sk); | |
563 | memcpy(crypto_info_aria_gcm_256->iv, | |
564 | cctx->iv + TLS_CIPHER_ARIA_GCM_256_SALT_SIZE, | |
565 | TLS_CIPHER_ARIA_GCM_256_IV_SIZE); | |
566 | memcpy(crypto_info_aria_gcm_256->rec_seq, cctx->rec_seq, | |
567 | TLS_CIPHER_ARIA_GCM_256_REC_SEQ_SIZE); | |
568 | release_sock(sk); | |
569 | if (copy_to_user(optval, | |
570 | crypto_info_aria_gcm_256, | |
571 | sizeof(*crypto_info_aria_gcm_256))) | |
572 | rc = -EFAULT; | |
573 | break; | |
574 | } | |
3c4d7559 DW |
575 | default: |
576 | rc = -EINVAL; | |
577 | } | |
578 | ||
579 | out: | |
580 | return rc; | |
581 | } | |
582 | ||
c1318b39 BP |
583 | static int do_tls_getsockopt_tx_zc(struct sock *sk, char __user *optval, |
584 | int __user *optlen) | |
585 | { | |
586 | struct tls_context *ctx = tls_get_ctx(sk); | |
587 | unsigned int value; | |
588 | int len; | |
589 | ||
590 | if (get_user(len, optlen)) | |
591 | return -EFAULT; | |
592 | ||
593 | if (len != sizeof(value)) | |
594 | return -EINVAL; | |
595 | ||
596 | value = ctx->zerocopy_sendfile; | |
597 | if (copy_to_user(optval, &value, sizeof(value))) | |
598 | return -EFAULT; | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
88527790 JK |
603 | static int do_tls_getsockopt_no_pad(struct sock *sk, char __user *optval, |
604 | int __user *optlen) | |
605 | { | |
606 | struct tls_context *ctx = tls_get_ctx(sk); | |
57128e98 | 607 | int value, len; |
88527790 JK |
608 | |
609 | if (ctx->prot_info.version != TLS_1_3_VERSION) | |
610 | return -EINVAL; | |
611 | ||
612 | if (get_user(len, optlen)) | |
613 | return -EFAULT; | |
614 | if (len < sizeof(value)) | |
615 | return -EINVAL; | |
616 | ||
617 | lock_sock(sk); | |
57128e98 | 618 | value = -EINVAL; |
88527790 JK |
619 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) |
620 | value = ctx->rx_no_pad; | |
621 | release_sock(sk); | |
57128e98 JK |
622 | if (value < 0) |
623 | return value; | |
88527790 JK |
624 | |
625 | if (put_user(sizeof(value), optlen)) | |
626 | return -EFAULT; | |
627 | if (copy_to_user(optval, &value, sizeof(value))) | |
628 | return -EFAULT; | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
3c4d7559 DW |
633 | static int do_tls_getsockopt(struct sock *sk, int optname, |
634 | char __user *optval, int __user *optlen) | |
635 | { | |
636 | int rc = 0; | |
637 | ||
638 | switch (optname) { | |
639 | case TLS_TX: | |
ffa81fa4 YH |
640 | case TLS_RX: |
641 | rc = do_tls_getsockopt_conf(sk, optval, optlen, | |
642 | optname == TLS_TX); | |
3c4d7559 | 643 | break; |
b489a6e5 | 644 | case TLS_TX_ZEROCOPY_RO: |
c1318b39 BP |
645 | rc = do_tls_getsockopt_tx_zc(sk, optval, optlen); |
646 | break; | |
88527790 JK |
647 | case TLS_RX_EXPECT_NO_PAD: |
648 | rc = do_tls_getsockopt_no_pad(sk, optval, optlen); | |
649 | break; | |
3c4d7559 DW |
650 | default: |
651 | rc = -ENOPROTOOPT; | |
652 | break; | |
653 | } | |
654 | return rc; | |
655 | } | |
656 | ||
657 | static int tls_getsockopt(struct sock *sk, int level, int optname, | |
658 | char __user *optval, int __user *optlen) | |
659 | { | |
660 | struct tls_context *ctx = tls_get_ctx(sk); | |
661 | ||
662 | if (level != SOL_TLS) | |
be7bbea1 JK |
663 | return ctx->sk_proto->getsockopt(sk, level, |
664 | optname, optval, optlen); | |
3c4d7559 DW |
665 | |
666 | return do_tls_getsockopt(sk, optname, optval, optlen); | |
667 | } | |
668 | ||
a7b75c5a | 669 | static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval, |
c46234eb | 670 | unsigned int optlen, int tx) |
3c4d7559 | 671 | { |
196c31b4 | 672 | struct tls_crypto_info *crypto_info; |
4509de14 | 673 | struct tls_crypto_info *alt_crypto_info; |
3c4d7559 | 674 | struct tls_context *ctx = tls_get_ctx(sk); |
fb99bce7 | 675 | size_t optsize; |
3c4d7559 | 676 | int rc = 0; |
58371585 | 677 | int conf; |
3c4d7559 | 678 | |
1ddcbfbf ZX |
679 | if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) |
680 | return -EINVAL; | |
3c4d7559 | 681 | |
4509de14 | 682 | if (tx) { |
86029d10 | 683 | crypto_info = &ctx->crypto_send.info; |
4509de14 VG |
684 | alt_crypto_info = &ctx->crypto_recv.info; |
685 | } else { | |
86029d10 | 686 | crypto_info = &ctx->crypto_recv.info; |
4509de14 VG |
687 | alt_crypto_info = &ctx->crypto_send.info; |
688 | } | |
c46234eb | 689 | |
196c31b4 | 690 | /* Currently we don't support set crypto info more than one time */ |
1ddcbfbf ZX |
691 | if (TLS_CRYPTO_INFO_READY(crypto_info)) |
692 | return -EBUSY; | |
196c31b4 | 693 | |
a7b75c5a | 694 | rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info)); |
3c4d7559 DW |
695 | if (rc) { |
696 | rc = -EFAULT; | |
257082e6 | 697 | goto err_crypto_info; |
3c4d7559 DW |
698 | } |
699 | ||
700 | /* check version */ | |
130b392c DW |
701 | if (crypto_info->version != TLS_1_2_VERSION && |
702 | crypto_info->version != TLS_1_3_VERSION) { | |
4a5cdc60 | 703 | rc = -EINVAL; |
196c31b4 | 704 | goto err_crypto_info; |
3c4d7559 DW |
705 | } |
706 | ||
4509de14 VG |
707 | /* Ensure that TLS version and ciphers are same in both directions */ |
708 | if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { | |
709 | if (alt_crypto_info->version != crypto_info->version || | |
710 | alt_crypto_info->cipher_type != crypto_info->cipher_type) { | |
711 | rc = -EINVAL; | |
712 | goto err_crypto_info; | |
713 | } | |
714 | } | |
715 | ||
196c31b4 | 716 | switch (crypto_info->cipher_type) { |
fb99bce7 | 717 | case TLS_CIPHER_AES_GCM_128: |
f295b3ae VG |
718 | optsize = sizeof(struct tls12_crypto_info_aes_gcm_128); |
719 | break; | |
fb99bce7 | 720 | case TLS_CIPHER_AES_GCM_256: { |
f295b3ae | 721 | optsize = sizeof(struct tls12_crypto_info_aes_gcm_256); |
3c4d7559 DW |
722 | break; |
723 | } | |
f295b3ae VG |
724 | case TLS_CIPHER_AES_CCM_128: |
725 | optsize = sizeof(struct tls12_crypto_info_aes_ccm_128); | |
726 | break; | |
74ea6106 VF |
727 | case TLS_CIPHER_CHACHA20_POLY1305: |
728 | optsize = sizeof(struct tls12_crypto_info_chacha20_poly1305); | |
729 | break; | |
227b9644 TZ |
730 | case TLS_CIPHER_SM4_GCM: |
731 | optsize = sizeof(struct tls12_crypto_info_sm4_gcm); | |
732 | break; | |
733 | case TLS_CIPHER_SM4_CCM: | |
734 | optsize = sizeof(struct tls12_crypto_info_sm4_ccm); | |
735 | break; | |
62e56ef5 TY |
736 | case TLS_CIPHER_ARIA_GCM_128: |
737 | if (crypto_info->version != TLS_1_2_VERSION) { | |
738 | rc = -EINVAL; | |
739 | goto err_crypto_info; | |
740 | } | |
741 | optsize = sizeof(struct tls12_crypto_info_aria_gcm_128); | |
742 | break; | |
743 | case TLS_CIPHER_ARIA_GCM_256: | |
744 | if (crypto_info->version != TLS_1_2_VERSION) { | |
745 | rc = -EINVAL; | |
746 | goto err_crypto_info; | |
747 | } | |
748 | optsize = sizeof(struct tls12_crypto_info_aria_gcm_256); | |
749 | break; | |
3c4d7559 DW |
750 | default: |
751 | rc = -EINVAL; | |
6db959c8 | 752 | goto err_crypto_info; |
3c4d7559 DW |
753 | } |
754 | ||
f295b3ae VG |
755 | if (optlen != optsize) { |
756 | rc = -EINVAL; | |
757 | goto err_crypto_info; | |
758 | } | |
759 | ||
d3c48151 CH |
760 | rc = copy_from_sockptr_offset(crypto_info + 1, optval, |
761 | sizeof(*crypto_info), | |
762 | optlen - sizeof(*crypto_info)); | |
f295b3ae VG |
763 | if (rc) { |
764 | rc = -EFAULT; | |
765 | goto err_crypto_info; | |
766 | } | |
767 | ||
c46234eb | 768 | if (tx) { |
e8f69799 IL |
769 | rc = tls_set_device_offload(sk, ctx); |
770 | conf = TLS_HW; | |
b32fd3cc JK |
771 | if (!rc) { |
772 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE); | |
773 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); | |
774 | } else { | |
e8f69799 | 775 | rc = tls_set_sw_offload(sk, ctx, 1); |
318892ac JK |
776 | if (rc) |
777 | goto err_crypto_info; | |
b32fd3cc JK |
778 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW); |
779 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); | |
e8f69799 IL |
780 | conf = TLS_SW; |
781 | } | |
c46234eb | 782 | } else { |
4799ac81 BP |
783 | rc = tls_set_device_offload_rx(sk, ctx); |
784 | conf = TLS_HW; | |
b32fd3cc JK |
785 | if (!rc) { |
786 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE); | |
787 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); | |
788 | } else { | |
4799ac81 | 789 | rc = tls_set_sw_offload(sk, ctx, 0); |
318892ac JK |
790 | if (rc) |
791 | goto err_crypto_info; | |
b32fd3cc JK |
792 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW); |
793 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); | |
4799ac81 BP |
794 | conf = TLS_SW; |
795 | } | |
313ab004 | 796 | tls_sw_strparser_arm(sk, ctx); |
c46234eb DW |
797 | } |
798 | ||
f66de3ee BP |
799 | if (tx) |
800 | ctx->tx_conf = conf; | |
801 | else | |
802 | ctx->rx_conf = conf; | |
6d88207f | 803 | update_sk_prot(sk, ctx); |
c46234eb DW |
804 | if (tx) { |
805 | ctx->sk_write_space = sk->sk_write_space; | |
806 | sk->sk_write_space = tls_write_space; | |
84c61fe1 JK |
807 | } else { |
808 | struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(ctx); | |
809 | ||
810 | tls_strp_check_rcv(&rx_ctx->strp); | |
c46234eb | 811 | } |
1ddcbfbf | 812 | return 0; |
3c4d7559 DW |
813 | |
814 | err_crypto_info: | |
c844eb46 | 815 | memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); |
3c4d7559 DW |
816 | return rc; |
817 | } | |
818 | ||
c1318b39 BP |
819 | static int do_tls_setsockopt_tx_zc(struct sock *sk, sockptr_t optval, |
820 | unsigned int optlen) | |
821 | { | |
822 | struct tls_context *ctx = tls_get_ctx(sk); | |
823 | unsigned int value; | |
824 | ||
825 | if (sockptr_is_null(optval) || optlen != sizeof(value)) | |
826 | return -EINVAL; | |
827 | ||
828 | if (copy_from_sockptr(&value, optval, sizeof(value))) | |
829 | return -EFAULT; | |
830 | ||
831 | if (value > 1) | |
832 | return -EINVAL; | |
833 | ||
834 | ctx->zerocopy_sendfile = value; | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
88527790 JK |
839 | static int do_tls_setsockopt_no_pad(struct sock *sk, sockptr_t optval, |
840 | unsigned int optlen) | |
841 | { | |
842 | struct tls_context *ctx = tls_get_ctx(sk); | |
843 | u32 val; | |
844 | int rc; | |
845 | ||
846 | if (ctx->prot_info.version != TLS_1_3_VERSION || | |
847 | sockptr_is_null(optval) || optlen < sizeof(val)) | |
848 | return -EINVAL; | |
849 | ||
850 | rc = copy_from_sockptr(&val, optval, sizeof(val)); | |
851 | if (rc) | |
852 | return -EFAULT; | |
853 | if (val > 1) | |
854 | return -EINVAL; | |
855 | rc = check_zeroed_sockptr(optval, sizeof(val), optlen - sizeof(val)); | |
856 | if (rc < 1) | |
857 | return rc == 0 ? -EINVAL : rc; | |
858 | ||
859 | lock_sock(sk); | |
860 | rc = -EINVAL; | |
861 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) { | |
862 | ctx->rx_no_pad = val; | |
863 | tls_update_rx_zc_capable(ctx); | |
864 | rc = 0; | |
865 | } | |
866 | release_sock(sk); | |
867 | ||
868 | return rc; | |
869 | } | |
870 | ||
a7b75c5a CH |
871 | static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval, |
872 | unsigned int optlen) | |
3c4d7559 DW |
873 | { |
874 | int rc = 0; | |
875 | ||
876 | switch (optname) { | |
877 | case TLS_TX: | |
c46234eb | 878 | case TLS_RX: |
3c4d7559 | 879 | lock_sock(sk); |
c46234eb DW |
880 | rc = do_tls_setsockopt_conf(sk, optval, optlen, |
881 | optname == TLS_TX); | |
3c4d7559 DW |
882 | release_sock(sk); |
883 | break; | |
b489a6e5 | 884 | case TLS_TX_ZEROCOPY_RO: |
c1318b39 BP |
885 | lock_sock(sk); |
886 | rc = do_tls_setsockopt_tx_zc(sk, optval, optlen); | |
887 | release_sock(sk); | |
888 | break; | |
88527790 JK |
889 | case TLS_RX_EXPECT_NO_PAD: |
890 | rc = do_tls_setsockopt_no_pad(sk, optval, optlen); | |
891 | break; | |
3c4d7559 DW |
892 | default: |
893 | rc = -ENOPROTOOPT; | |
894 | break; | |
895 | } | |
896 | return rc; | |
897 | } | |
898 | ||
899 | static int tls_setsockopt(struct sock *sk, int level, int optname, | |
a7b75c5a | 900 | sockptr_t optval, unsigned int optlen) |
3c4d7559 DW |
901 | { |
902 | struct tls_context *ctx = tls_get_ctx(sk); | |
903 | ||
904 | if (level != SOL_TLS) | |
be7bbea1 JK |
905 | return ctx->sk_proto->setsockopt(sk, level, optname, optval, |
906 | optlen); | |
3c4d7559 DW |
907 | |
908 | return do_tls_setsockopt(sk, optname, optval, optlen); | |
909 | } | |
910 | ||
08700dab | 911 | struct tls_context *tls_ctx_create(struct sock *sk) |
dd0bed16 AG |
912 | { |
913 | struct inet_connection_sock *icsk = inet_csk(sk); | |
914 | struct tls_context *ctx; | |
915 | ||
c6ec179a | 916 | ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); |
dd0bed16 AG |
917 | if (!ctx) |
918 | return NULL; | |
919 | ||
79ffe608 | 920 | mutex_init(&ctx->tx_lock); |
15a7dea7 | 921 | rcu_assign_pointer(icsk->icsk_ulp_data, ctx); |
d5bee737 | 922 | ctx->sk_proto = READ_ONCE(sk->sk_prot); |
c55dcdd4 | 923 | ctx->sk = sk; |
dd0bed16 AG |
924 | return ctx; |
925 | } | |
926 | ||
f3911f73 JK |
927 | static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
928 | const struct proto_ops *base) | |
929 | { | |
930 | ops[TLS_BASE][TLS_BASE] = *base; | |
931 | ||
932 | ops[TLS_SW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; | |
933 | ops[TLS_SW ][TLS_BASE].sendpage_locked = tls_sw_sendpage_locked; | |
934 | ||
935 | ops[TLS_BASE][TLS_SW ] = ops[TLS_BASE][TLS_BASE]; | |
936 | ops[TLS_BASE][TLS_SW ].splice_read = tls_sw_splice_read; | |
937 | ||
938 | ops[TLS_SW ][TLS_SW ] = ops[TLS_SW ][TLS_BASE]; | |
939 | ops[TLS_SW ][TLS_SW ].splice_read = tls_sw_splice_read; | |
940 | ||
941 | #ifdef CONFIG_TLS_DEVICE | |
942 | ops[TLS_HW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; | |
943 | ops[TLS_HW ][TLS_BASE].sendpage_locked = NULL; | |
944 | ||
945 | ops[TLS_HW ][TLS_SW ] = ops[TLS_BASE][TLS_SW ]; | |
946 | ops[TLS_HW ][TLS_SW ].sendpage_locked = NULL; | |
947 | ||
948 | ops[TLS_BASE][TLS_HW ] = ops[TLS_BASE][TLS_SW ]; | |
949 | ||
950 | ops[TLS_SW ][TLS_HW ] = ops[TLS_SW ][TLS_SW ]; | |
951 | ||
952 | ops[TLS_HW ][TLS_HW ] = ops[TLS_HW ][TLS_SW ]; | |
953 | ops[TLS_HW ][TLS_HW ].sendpage_locked = NULL; | |
954 | #endif | |
955 | #ifdef CONFIG_TLS_TOE | |
956 | ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base; | |
957 | #endif | |
958 | } | |
959 | ||
63a6b3fe AG |
960 | static void tls_build_proto(struct sock *sk) |
961 | { | |
962 | int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; | |
9a893949 | 963 | struct proto *prot = READ_ONCE(sk->sk_prot); |
63a6b3fe AG |
964 | |
965 | /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ | |
966 | if (ip_ver == TLSV6 && | |
5bb4c45d | 967 | unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) { |
63a6b3fe | 968 | mutex_lock(&tcpv6_prot_mutex); |
5bb4c45d JS |
969 | if (likely(prot != saved_tcpv6_prot)) { |
970 | build_protos(tls_prots[TLSV6], prot); | |
f3911f73 JK |
971 | build_proto_ops(tls_proto_ops[TLSV6], |
972 | sk->sk_socket->ops); | |
5bb4c45d | 973 | smp_store_release(&saved_tcpv6_prot, prot); |
63a6b3fe AG |
974 | } |
975 | mutex_unlock(&tcpv6_prot_mutex); | |
976 | } | |
977 | ||
978 | if (ip_ver == TLSV4 && | |
5bb4c45d | 979 | unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) { |
63a6b3fe | 980 | mutex_lock(&tcpv4_prot_mutex); |
5bb4c45d JS |
981 | if (likely(prot != saved_tcpv4_prot)) { |
982 | build_protos(tls_prots[TLSV4], prot); | |
f3911f73 JK |
983 | build_proto_ops(tls_proto_ops[TLSV4], |
984 | sk->sk_socket->ops); | |
5bb4c45d | 985 | smp_store_release(&saved_tcpv4_prot, prot); |
63a6b3fe AG |
986 | } |
987 | mutex_unlock(&tcpv4_prot_mutex); | |
988 | } | |
989 | } | |
990 | ||
f66de3ee | 991 | static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
f13fe3e6 | 992 | const struct proto *base) |
c113187d | 993 | { |
f66de3ee BP |
994 | prot[TLS_BASE][TLS_BASE] = *base; |
995 | prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; | |
996 | prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; | |
997 | prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; | |
998 | ||
999 | prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; | |
1000 | prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; | |
1001 | prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; | |
1002 | ||
1003 | prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; | |
924ad65e | 1004 | prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; |
7b50ecfc | 1005 | prot[TLS_BASE][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; |
924ad65e | 1006 | prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; |
f66de3ee BP |
1007 | |
1008 | prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; | |
924ad65e | 1009 | prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; |
7b50ecfc | 1010 | prot[TLS_SW][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; |
924ad65e | 1011 | prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; |
f66de3ee | 1012 | |
e8f69799 IL |
1013 | #ifdef CONFIG_TLS_DEVICE |
1014 | prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; | |
1015 | prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; | |
1016 | prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; | |
1017 | ||
1018 | prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; | |
1019 | prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; | |
1020 | prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; | |
4799ac81 BP |
1021 | |
1022 | prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; | |
1023 | ||
1024 | prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; | |
1025 | ||
1026 | prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; | |
e8f69799 | 1027 | #endif |
53b4414a | 1028 | #ifdef CONFIG_TLS_TOE |
f66de3ee | 1029 | prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; |
0eb8745e JK |
1030 | prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash; |
1031 | prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash; | |
53b4414a | 1032 | #endif |
c113187d BP |
1033 | } |
1034 | ||
3c4d7559 DW |
1035 | static int tls_init(struct sock *sk) |
1036 | { | |
3c4d7559 DW |
1037 | struct tls_context *ctx; |
1038 | int rc = 0; | |
1039 | ||
16bed0e6 JK |
1040 | tls_build_proto(sk); |
1041 | ||
53b4414a | 1042 | #ifdef CONFIG_TLS_TOE |
0eb8745e | 1043 | if (tls_toe_bypass(sk)) |
95fa1454 | 1044 | return 0; |
53b4414a | 1045 | #endif |
dd0bed16 | 1046 | |
d91c3e17 IL |
1047 | /* The TLS ulp is currently supported only for TCP sockets |
1048 | * in ESTABLISHED state. | |
1049 | * Supporting sockets in LISTEN state will require us | |
1050 | * to modify the accept implementation to clone rather then | |
1051 | * share the ulp context. | |
1052 | */ | |
1053 | if (sk->sk_state != TCP_ESTABLISHED) | |
4a5cdc60 | 1054 | return -ENOTCONN; |
d91c3e17 | 1055 | |
3c4d7559 | 1056 | /* allocate tls context */ |
95fa1454 | 1057 | write_lock_bh(&sk->sk_callback_lock); |
08700dab | 1058 | ctx = tls_ctx_create(sk); |
3c4d7559 DW |
1059 | if (!ctx) { |
1060 | rc = -ENOMEM; | |
1061 | goto out; | |
1062 | } | |
6d88207f | 1063 | |
f66de3ee BP |
1064 | ctx->tx_conf = TLS_BASE; |
1065 | ctx->rx_conf = TLS_BASE; | |
6d88207f | 1066 | update_sk_prot(sk, ctx); |
3c4d7559 | 1067 | out: |
95fa1454 | 1068 | write_unlock_bh(&sk->sk_callback_lock); |
3c4d7559 DW |
1069 | return rc; |
1070 | } | |
1071 | ||
33bfe20d JF |
1072 | static void tls_update(struct sock *sk, struct proto *p, |
1073 | void (*write_space)(struct sock *sk)) | |
95fa1454 JF |
1074 | { |
1075 | struct tls_context *ctx; | |
1076 | ||
e34a07c0 JK |
1077 | WARN_ON_ONCE(sk->sk_prot == p); |
1078 | ||
95fa1454 | 1079 | ctx = tls_get_ctx(sk); |
33bfe20d JF |
1080 | if (likely(ctx)) { |
1081 | ctx->sk_write_space = write_space; | |
95fa1454 | 1082 | ctx->sk_proto = p; |
33bfe20d | 1083 | } else { |
b8e202d1 JS |
1084 | /* Pairs with lockless read in sk_clone_lock(). */ |
1085 | WRITE_ONCE(sk->sk_prot, p); | |
33bfe20d JF |
1086 | sk->sk_write_space = write_space; |
1087 | } | |
95fa1454 JF |
1088 | } |
1089 | ||
58790314 JK |
1090 | static u16 tls_user_config(struct tls_context *ctx, bool tx) |
1091 | { | |
1092 | u16 config = tx ? ctx->tx_conf : ctx->rx_conf; | |
1093 | ||
1094 | switch (config) { | |
1095 | case TLS_BASE: | |
1096 | return TLS_CONF_BASE; | |
1097 | case TLS_SW: | |
1098 | return TLS_CONF_SW; | |
1099 | case TLS_HW: | |
1100 | return TLS_CONF_HW; | |
1101 | case TLS_HW_RECORD: | |
1102 | return TLS_CONF_HW_RECORD; | |
1103 | } | |
1104 | return 0; | |
1105 | } | |
1106 | ||
26811cc9 DC |
1107 | static int tls_get_info(const struct sock *sk, struct sk_buff *skb) |
1108 | { | |
1109 | u16 version, cipher_type; | |
1110 | struct tls_context *ctx; | |
1111 | struct nlattr *start; | |
1112 | int err; | |
1113 | ||
1114 | start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS); | |
1115 | if (!start) | |
1116 | return -EMSGSIZE; | |
1117 | ||
1118 | rcu_read_lock(); | |
1119 | ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data); | |
1120 | if (!ctx) { | |
1121 | err = 0; | |
1122 | goto nla_failure; | |
1123 | } | |
1124 | version = ctx->prot_info.version; | |
1125 | if (version) { | |
1126 | err = nla_put_u16(skb, TLS_INFO_VERSION, version); | |
1127 | if (err) | |
1128 | goto nla_failure; | |
1129 | } | |
1130 | cipher_type = ctx->prot_info.cipher_type; | |
1131 | if (cipher_type) { | |
1132 | err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type); | |
1133 | if (err) | |
1134 | goto nla_failure; | |
1135 | } | |
1136 | err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true)); | |
1137 | if (err) | |
1138 | goto nla_failure; | |
1139 | ||
1140 | err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false)); | |
1141 | if (err) | |
1142 | goto nla_failure; | |
1143 | ||
c1318b39 | 1144 | if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) { |
b489a6e5 | 1145 | err = nla_put_flag(skb, TLS_INFO_ZC_RO_TX); |
c1318b39 BP |
1146 | if (err) |
1147 | goto nla_failure; | |
1148 | } | |
88527790 JK |
1149 | if (ctx->rx_no_pad) { |
1150 | err = nla_put_flag(skb, TLS_INFO_RX_NO_PAD); | |
1151 | if (err) | |
1152 | goto nla_failure; | |
1153 | } | |
c1318b39 | 1154 | |
26811cc9 DC |
1155 | rcu_read_unlock(); |
1156 | nla_nest_end(skb, start); | |
1157 | return 0; | |
1158 | ||
1159 | nla_failure: | |
1160 | rcu_read_unlock(); | |
1161 | nla_nest_cancel(skb, start); | |
1162 | return err; | |
1163 | } | |
1164 | ||
1165 | static size_t tls_get_info_size(const struct sock *sk) | |
1166 | { | |
1167 | size_t size = 0; | |
1168 | ||
1169 | size += nla_total_size(0) + /* INET_ULP_INFO_TLS */ | |
1170 | nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */ | |
1171 | nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */ | |
1172 | nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */ | |
1173 | nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */ | |
b489a6e5 | 1174 | nla_total_size(0) + /* TLS_INFO_ZC_RO_TX */ |
88527790 | 1175 | nla_total_size(0) + /* TLS_INFO_RX_NO_PAD */ |
26811cc9 DC |
1176 | 0; |
1177 | ||
1178 | return size; | |
1179 | } | |
1180 | ||
d26b698d JK |
1181 | static int __net_init tls_init_net(struct net *net) |
1182 | { | |
1183 | int err; | |
1184 | ||
1185 | net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib); | |
1186 | if (!net->mib.tls_statistics) | |
1187 | return -ENOMEM; | |
1188 | ||
1189 | err = tls_proc_init(net); | |
1190 | if (err) | |
1191 | goto err_free_stats; | |
1192 | ||
1193 | return 0; | |
1194 | err_free_stats: | |
1195 | free_percpu(net->mib.tls_statistics); | |
1196 | return err; | |
1197 | } | |
1198 | ||
1199 | static void __net_exit tls_exit_net(struct net *net) | |
1200 | { | |
1201 | tls_proc_fini(net); | |
1202 | free_percpu(net->mib.tls_statistics); | |
1203 | } | |
1204 | ||
1205 | static struct pernet_operations tls_proc_ops = { | |
1206 | .init = tls_init_net, | |
1207 | .exit = tls_exit_net, | |
1208 | }; | |
1209 | ||
3c4d7559 DW |
1210 | static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { |
1211 | .name = "tls", | |
1212 | .owner = THIS_MODULE, | |
1213 | .init = tls_init, | |
95fa1454 | 1214 | .update = tls_update, |
26811cc9 DC |
1215 | .get_info = tls_get_info, |
1216 | .get_info_size = tls_get_info_size, | |
3c4d7559 DW |
1217 | }; |
1218 | ||
1219 | static int __init tls_register(void) | |
1220 | { | |
d26b698d JK |
1221 | int err; |
1222 | ||
1223 | err = register_pernet_subsys(&tls_proc_ops); | |
1224 | if (err) | |
1225 | return err; | |
1226 | ||
84c61fe1 JK |
1227 | err = tls_strp_dev_init(); |
1228 | if (err) | |
1229 | goto err_pernet; | |
1230 | ||
3d8c51b2 | 1231 | err = tls_device_init(); |
84c61fe1 JK |
1232 | if (err) |
1233 | goto err_strp; | |
3d8c51b2 | 1234 | |
3c4d7559 DW |
1235 | tcp_register_ulp(&tcp_tls_ulp_ops); |
1236 | ||
1237 | return 0; | |
84c61fe1 JK |
1238 | err_strp: |
1239 | tls_strp_dev_exit(); | |
1240 | err_pernet: | |
1241 | unregister_pernet_subsys(&tls_proc_ops); | |
1242 | return err; | |
3c4d7559 DW |
1243 | } |
1244 | ||
1245 | static void __exit tls_unregister(void) | |
1246 | { | |
1247 | tcp_unregister_ulp(&tcp_tls_ulp_ops); | |
84c61fe1 | 1248 | tls_strp_dev_exit(); |
e8f69799 | 1249 | tls_device_cleanup(); |
d26b698d | 1250 | unregister_pernet_subsys(&tls_proc_ops); |
3c4d7559 DW |
1251 | } |
1252 | ||
1253 | module_init(tls_register); | |
1254 | module_exit(tls_unregister); |