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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 | |
0d98cc02 SD |
61 | #define CHECK_CIPHER_DESC(cipher,ci) \ |
62 | static_assert(cipher ## _IV_SIZE <= MAX_IV_SIZE); \ | |
63 | static_assert(cipher ## _REC_SEQ_SIZE <= TLS_MAX_REC_SEQ_SIZE); \ | |
64 | static_assert(cipher ## _TAG_SIZE == TLS_TAG_SIZE); \ | |
65 | static_assert(sizeof_field(struct ci, iv) == cipher ## _IV_SIZE); \ | |
66 | static_assert(sizeof_field(struct ci, key) == cipher ## _KEY_SIZE); \ | |
67 | static_assert(sizeof_field(struct ci, salt) == cipher ## _SALT_SIZE); \ | |
68 | static_assert(sizeof_field(struct ci, rec_seq) == cipher ## _REC_SEQ_SIZE); | |
69 | ||
176a3f50 SD |
70 | #define __CIPHER_DESC(ci) \ |
71 | .iv_offset = offsetof(struct ci, iv), \ | |
72 | .key_offset = offsetof(struct ci, key), \ | |
73 | .salt_offset = offsetof(struct ci, salt), \ | |
74 | .rec_seq_offset = offsetof(struct ci, rec_seq), \ | |
75 | .crypto_info = sizeof(struct ci) | |
76 | ||
77 | #define CIPHER_DESC(cipher,ci,algname,_offloadable) [cipher - TLS_CIPHER_MIN] = { \ | |
78 | .nonce = cipher ## _IV_SIZE, \ | |
79 | .iv = cipher ## _IV_SIZE, \ | |
80 | .key = cipher ## _KEY_SIZE, \ | |
81 | .salt = cipher ## _SALT_SIZE, \ | |
82 | .tag = cipher ## _TAG_SIZE, \ | |
83 | .rec_seq = cipher ## _REC_SEQ_SIZE, \ | |
84 | .cipher_name = algname, \ | |
85 | .offloadable = _offloadable, \ | |
86 | __CIPHER_DESC(ci), \ | |
87 | } | |
88 | ||
89 | #define CIPHER_DESC_NONCE0(cipher,ci,algname,_offloadable) [cipher - TLS_CIPHER_MIN] = { \ | |
90 | .nonce = 0, \ | |
2d2c5ea2 TT |
91 | .iv = cipher ## _IV_SIZE, \ |
92 | .key = cipher ## _KEY_SIZE, \ | |
93 | .salt = cipher ## _SALT_SIZE, \ | |
94 | .tag = cipher ## _TAG_SIZE, \ | |
95 | .rec_seq = cipher ## _REC_SEQ_SIZE, \ | |
176a3f50 SD |
96 | .cipher_name = algname, \ |
97 | .offloadable = _offloadable, \ | |
98 | __CIPHER_DESC(ci), \ | |
2d2c5ea2 TT |
99 | } |
100 | ||
8db44ab2 | 101 | const struct tls_cipher_desc tls_cipher_desc[TLS_CIPHER_MAX + 1 - TLS_CIPHER_MIN] = { |
176a3f50 SD |
102 | CIPHER_DESC(TLS_CIPHER_AES_GCM_128, tls12_crypto_info_aes_gcm_128, "gcm(aes)", true), |
103 | CIPHER_DESC(TLS_CIPHER_AES_GCM_256, tls12_crypto_info_aes_gcm_256, "gcm(aes)", true), | |
104 | CIPHER_DESC(TLS_CIPHER_AES_CCM_128, tls12_crypto_info_aes_ccm_128, "ccm(aes)", false), | |
105 | CIPHER_DESC_NONCE0(TLS_CIPHER_CHACHA20_POLY1305, tls12_crypto_info_chacha20_poly1305, "rfc7539(chacha20,poly1305)", false), | |
106 | CIPHER_DESC(TLS_CIPHER_SM4_GCM, tls12_crypto_info_sm4_gcm, "gcm(sm4)", false), | |
107 | CIPHER_DESC(TLS_CIPHER_SM4_CCM, tls12_crypto_info_sm4_ccm, "ccm(sm4)", false), | |
108 | CIPHER_DESC(TLS_CIPHER_ARIA_GCM_128, tls12_crypto_info_aria_gcm_128, "gcm(aria)", false), | |
109 | CIPHER_DESC(TLS_CIPHER_ARIA_GCM_256, tls12_crypto_info_aria_gcm_256, "gcm(aria)", false), | |
2d2c5ea2 TT |
110 | }; |
111 | ||
0d98cc02 SD |
112 | CHECK_CIPHER_DESC(TLS_CIPHER_AES_GCM_128, tls12_crypto_info_aes_gcm_128); |
113 | CHECK_CIPHER_DESC(TLS_CIPHER_AES_GCM_256, tls12_crypto_info_aes_gcm_256); | |
114 | CHECK_CIPHER_DESC(TLS_CIPHER_AES_CCM_128, tls12_crypto_info_aes_ccm_128); | |
115 | CHECK_CIPHER_DESC(TLS_CIPHER_CHACHA20_POLY1305, tls12_crypto_info_chacha20_poly1305); | |
116 | CHECK_CIPHER_DESC(TLS_CIPHER_SM4_GCM, tls12_crypto_info_sm4_gcm); | |
117 | CHECK_CIPHER_DESC(TLS_CIPHER_SM4_CCM, tls12_crypto_info_sm4_ccm); | |
118 | CHECK_CIPHER_DESC(TLS_CIPHER_ARIA_GCM_128, tls12_crypto_info_aria_gcm_128); | |
119 | CHECK_CIPHER_DESC(TLS_CIPHER_ARIA_GCM_256, tls12_crypto_info_aria_gcm_256); | |
120 | ||
f691a25c | 121 | static const struct proto *saved_tcpv6_prot; |
c113187d | 122 | static DEFINE_MUTEX(tcpv6_prot_mutex); |
f691a25c | 123 | static const struct proto *saved_tcpv4_prot; |
28cb6f1e | 124 | static DEFINE_MUTEX(tcpv4_prot_mutex); |
f66de3ee | 125 | static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; |
f3911f73 | 126 | static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; |
63a6b3fe | 127 | static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
f13fe3e6 | 128 | const struct proto *base); |
6d88207f | 129 | |
08700dab | 130 | void update_sk_prot(struct sock *sk, struct tls_context *ctx) |
6d88207f | 131 | { |
c113187d BP |
132 | int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; |
133 | ||
d5bee737 JS |
134 | WRITE_ONCE(sk->sk_prot, |
135 | &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]); | |
f3911f73 JK |
136 | WRITE_ONCE(sk->sk_socket->ops, |
137 | &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]); | |
6d88207f | 138 | } |
3c4d7559 DW |
139 | |
140 | int wait_on_pending_writer(struct sock *sk, long *timeo) | |
141 | { | |
3c4d7559 | 142 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
419ce133 | 143 | int ret, rc = 0; |
3c4d7559 DW |
144 | |
145 | add_wait_queue(sk_sleep(sk), &wait); | |
146 | while (1) { | |
147 | if (!*timeo) { | |
148 | rc = -EAGAIN; | |
149 | break; | |
150 | } | |
151 | ||
152 | if (signal_pending(current)) { | |
153 | rc = sock_intr_errno(*timeo); | |
154 | break; | |
155 | } | |
156 | ||
419ce133 PA |
157 | ret = sk_wait_event(sk, timeo, |
158 | !READ_ONCE(sk->sk_write_pending), &wait); | |
159 | if (ret) { | |
160 | if (ret < 0) | |
161 | rc = ret; | |
3c4d7559 | 162 | break; |
419ce133 | 163 | } |
3c4d7559 DW |
164 | } |
165 | remove_wait_queue(sk_sleep(sk), &wait); | |
166 | return rc; | |
167 | } | |
168 | ||
169 | int tls_push_sg(struct sock *sk, | |
170 | struct tls_context *ctx, | |
171 | struct scatterlist *sg, | |
172 | u16 first_offset, | |
173 | int flags) | |
174 | { | |
e117dcfd DH |
175 | struct bio_vec bvec; |
176 | struct msghdr msg = { | |
b848b26c | 177 | .msg_flags = MSG_SPLICE_PAGES | flags, |
e117dcfd | 178 | }; |
3c4d7559 DW |
179 | int ret = 0; |
180 | struct page *p; | |
181 | size_t size; | |
182 | int offset = first_offset; | |
183 | ||
184 | size = sg->length - offset; | |
185 | offset += sg->offset; | |
186 | ||
e117dcfd | 187 | ctx->splicing_pages = true; |
3c4d7559 | 188 | while (1) { |
3c4d7559 DW |
189 | /* is sending application-limited? */ |
190 | tcp_rate_check_app_limited(sk); | |
191 | p = sg_page(sg); | |
192 | retry: | |
e117dcfd DH |
193 | bvec_set_page(&bvec, p, size, offset); |
194 | iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size); | |
195 | ||
196 | ret = tcp_sendmsg_locked(sk, &msg, size); | |
3c4d7559 DW |
197 | |
198 | if (ret != size) { | |
199 | if (ret > 0) { | |
200 | offset += ret; | |
201 | size -= ret; | |
202 | goto retry; | |
203 | } | |
204 | ||
205 | offset -= sg->offset; | |
206 | ctx->partially_sent_offset = offset; | |
207 | ctx->partially_sent_record = (void *)sg; | |
e117dcfd | 208 | ctx->splicing_pages = false; |
3c4d7559 DW |
209 | return ret; |
210 | } | |
211 | ||
212 | put_page(p); | |
213 | sk_mem_uncharge(sk, sg->length); | |
214 | sg = sg_next(sg); | |
215 | if (!sg) | |
216 | break; | |
217 | ||
218 | offset = sg->offset; | |
219 | size = sg->length; | |
220 | } | |
221 | ||
e117dcfd | 222 | ctx->splicing_pages = false; |
3c4d7559 DW |
223 | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static int tls_handle_open_record(struct sock *sk, int flags) | |
228 | { | |
229 | struct tls_context *ctx = tls_get_ctx(sk); | |
230 | ||
231 | if (tls_is_pending_open_record(ctx)) | |
232 | return ctx->push_pending_record(sk, flags); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
58790314 JK |
237 | int tls_process_cmsg(struct sock *sk, struct msghdr *msg, |
238 | unsigned char *record_type) | |
3c4d7559 DW |
239 | { |
240 | struct cmsghdr *cmsg; | |
241 | int rc = -EINVAL; | |
242 | ||
243 | for_each_cmsghdr(cmsg, msg) { | |
244 | if (!CMSG_OK(msg, cmsg)) | |
245 | return -EINVAL; | |
246 | if (cmsg->cmsg_level != SOL_TLS) | |
247 | continue; | |
248 | ||
249 | switch (cmsg->cmsg_type) { | |
250 | case TLS_SET_RECORD_TYPE: | |
251 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) | |
252 | return -EINVAL; | |
253 | ||
254 | if (msg->msg_flags & MSG_MORE) | |
255 | return -EINVAL; | |
256 | ||
257 | rc = tls_handle_open_record(sk, msg->msg_flags); | |
258 | if (rc) | |
259 | return rc; | |
260 | ||
261 | *record_type = *(unsigned char *)CMSG_DATA(cmsg); | |
262 | rc = 0; | |
263 | break; | |
264 | default: | |
265 | return -EINVAL; | |
266 | } | |
267 | } | |
268 | ||
269 | return rc; | |
270 | } | |
271 | ||
a42055e8 VG |
272 | int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
273 | int flags) | |
3c4d7559 DW |
274 | { |
275 | struct scatterlist *sg; | |
276 | u16 offset; | |
277 | ||
3c4d7559 DW |
278 | sg = ctx->partially_sent_record; |
279 | offset = ctx->partially_sent_offset; | |
280 | ||
281 | ctx->partially_sent_record = NULL; | |
282 | return tls_push_sg(sk, ctx, sg, offset, flags); | |
283 | } | |
284 | ||
c5daa6cc | 285 | void tls_free_partial_record(struct sock *sk, struct tls_context *ctx) |
35b71a34 JK |
286 | { |
287 | struct scatterlist *sg; | |
288 | ||
c5daa6cc | 289 | for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) { |
35b71a34 JK |
290 | put_page(sg_page(sg)); |
291 | sk_mem_uncharge(sk, sg->length); | |
35b71a34 JK |
292 | } |
293 | ctx->partially_sent_record = NULL; | |
35b71a34 JK |
294 | } |
295 | ||
3c4d7559 DW |
296 | static void tls_write_space(struct sock *sk) |
297 | { | |
298 | struct tls_context *ctx = tls_get_ctx(sk); | |
299 | ||
e117dcfd | 300 | /* If splicing_pages call lower protocol write space handler |
67db7cd2 | 301 | * to ensure we wake up any waiting operations there. For example |
e117dcfd | 302 | * if splicing pages where to call sk_wait_event. |
67db7cd2 | 303 | */ |
e117dcfd | 304 | if (ctx->splicing_pages) { |
67db7cd2 | 305 | ctx->sk_write_space(sk); |
c212d2c7 | 306 | return; |
67db7cd2 | 307 | } |
c212d2c7 | 308 | |
7463d3a2 BP |
309 | #ifdef CONFIG_TLS_DEVICE |
310 | if (ctx->tx_conf == TLS_HW) | |
311 | tls_device_write_space(sk, ctx); | |
312 | else | |
313 | #endif | |
314 | tls_sw_write_space(sk, ctx); | |
4504ab0e VG |
315 | |
316 | ctx->sk_write_space(sk); | |
3c4d7559 DW |
317 | } |
318 | ||
15a7dea7 JK |
319 | /** |
320 | * tls_ctx_free() - free TLS ULP context | |
321 | * @sk: socket to with @ctx is attached | |
322 | * @ctx: TLS context structure | |
323 | * | |
324 | * Free TLS context. If @sk is %NULL caller guarantees that the socket | |
325 | * to which @ctx was attached has no outstanding references. | |
326 | */ | |
327 | void tls_ctx_free(struct sock *sk, struct tls_context *ctx) | |
86029d10 SD |
328 | { |
329 | if (!ctx) | |
330 | return; | |
331 | ||
332 | memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); | |
333 | memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); | |
79ffe608 | 334 | mutex_destroy(&ctx->tx_lock); |
15a7dea7 JK |
335 | |
336 | if (sk) | |
337 | kfree_rcu(ctx, rcu); | |
338 | else | |
339 | kfree(ctx); | |
86029d10 SD |
340 | } |
341 | ||
313ab004 JF |
342 | static void tls_sk_proto_cleanup(struct sock *sk, |
343 | struct tls_context *ctx, long timeo) | |
3c4d7559 | 344 | { |
9354544c DM |
345 | if (unlikely(sk->sk_write_pending) && |
346 | !wait_on_pending_writer(sk, &timeo)) | |
3c4d7559 DW |
347 | tls_handle_open_record(sk, 0); |
348 | ||
f66de3ee BP |
349 | /* We need these for tls_sw_fallback handling of other packets */ |
350 | if (ctx->tx_conf == TLS_SW) { | |
351 | kfree(ctx->tx.rec_seq); | |
352 | kfree(ctx->tx.iv); | |
313ab004 | 353 | tls_sw_release_resources_tx(sk); |
b32fd3cc | 354 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); |
35b71a34 JK |
355 | } else if (ctx->tx_conf == TLS_HW) { |
356 | tls_device_free_resources_tx(sk); | |
b32fd3cc | 357 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); |
f66de3ee | 358 | } |
3c4d7559 | 359 | |
b32fd3cc | 360 | if (ctx->rx_conf == TLS_SW) { |
313ab004 | 361 | tls_sw_release_resources_rx(sk); |
b32fd3cc JK |
362 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); |
363 | } else if (ctx->rx_conf == TLS_HW) { | |
4799ac81 | 364 | tls_device_offload_cleanup_rx(sk); |
b32fd3cc JK |
365 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); |
366 | } | |
313ab004 JF |
367 | } |
368 | ||
369 | static void tls_sk_proto_close(struct sock *sk, long timeout) | |
370 | { | |
95fa1454 | 371 | struct inet_connection_sock *icsk = inet_csk(sk); |
313ab004 JF |
372 | struct tls_context *ctx = tls_get_ctx(sk); |
373 | long timeo = sock_sndtimeo(sk, 0); | |
374 | bool free_ctx; | |
375 | ||
376 | if (ctx->tx_conf == TLS_SW) | |
377 | tls_sw_cancel_work_tx(ctx); | |
378 | ||
379 | lock_sock(sk); | |
380 | free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW; | |
313ab004 JF |
381 | |
382 | if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE) | |
383 | tls_sk_proto_cleanup(sk, ctx, timeo); | |
e8f69799 | 384 | |
95fa1454 JF |
385 | write_lock_bh(&sk->sk_callback_lock); |
386 | if (free_ctx) | |
15a7dea7 | 387 | rcu_assign_pointer(icsk->icsk_ulp_data, NULL); |
d5bee737 | 388 | WRITE_ONCE(sk->sk_prot, ctx->sk_proto); |
d85f0177 JF |
389 | if (sk->sk_write_space == tls_write_space) |
390 | sk->sk_write_space = ctx->sk_write_space; | |
95fa1454 | 391 | write_unlock_bh(&sk->sk_callback_lock); |
3c4d7559 | 392 | release_sock(sk); |
313ab004 JF |
393 | if (ctx->tx_conf == TLS_SW) |
394 | tls_sw_free_ctx_tx(ctx); | |
395 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) | |
396 | tls_sw_strparser_done(ctx); | |
397 | if (ctx->rx_conf == TLS_SW) | |
398 | tls_sw_free_ctx_rx(ctx); | |
be7bbea1 | 399 | ctx->sk_proto->close(sk, timeout); |
313ab004 | 400 | |
98f0a395 | 401 | if (free_ctx) |
15a7dea7 | 402 | tls_ctx_free(sk, ctx); |
3c4d7559 DW |
403 | } |
404 | ||
121dca78 JK |
405 | static __poll_t tls_sk_poll(struct file *file, struct socket *sock, |
406 | struct poll_table_struct *wait) | |
407 | { | |
408 | struct tls_sw_context_rx *ctx; | |
409 | struct tls_context *tls_ctx; | |
410 | struct sock *sk = sock->sk; | |
411 | struct sk_psock *psock; | |
412 | __poll_t mask = 0; | |
413 | u8 shutdown; | |
414 | int state; | |
415 | ||
416 | mask = tcp_poll(file, sock, wait); | |
417 | ||
418 | state = inet_sk_state_load(sk); | |
419 | shutdown = READ_ONCE(sk->sk_shutdown); | |
420 | if (unlikely(state != TCP_ESTABLISHED || shutdown & RCV_SHUTDOWN)) | |
421 | return mask; | |
422 | ||
423 | tls_ctx = tls_get_ctx(sk); | |
424 | ctx = tls_sw_ctx_rx(tls_ctx); | |
425 | psock = sk_psock_get(sk); | |
426 | ||
427 | if (skb_queue_empty_lockless(&ctx->rx_list) && | |
428 | !tls_strp_msg_ready(ctx) && | |
429 | sk_psock_queue_empty(psock)) | |
430 | mask &= ~(EPOLLIN | EPOLLRDNORM); | |
431 | ||
432 | if (psock) | |
433 | sk_psock_put(sk, psock); | |
434 | ||
435 | return mask; | |
436 | } | |
437 | ||
ffa81fa4 YH |
438 | static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, |
439 | int __user *optlen, int tx) | |
3c4d7559 DW |
440 | { |
441 | int rc = 0; | |
077e05d1 | 442 | const struct tls_cipher_desc *cipher_desc; |
3c4d7559 DW |
443 | struct tls_context *ctx = tls_get_ctx(sk); |
444 | struct tls_crypto_info *crypto_info; | |
ffa81fa4 | 445 | struct cipher_context *cctx; |
3c4d7559 DW |
446 | int len; |
447 | ||
448 | if (get_user(len, optlen)) | |
449 | return -EFAULT; | |
450 | ||
451 | if (!optval || (len < sizeof(*crypto_info))) { | |
452 | rc = -EINVAL; | |
453 | goto out; | |
454 | } | |
455 | ||
456 | if (!ctx) { | |
457 | rc = -EBUSY; | |
458 | goto out; | |
459 | } | |
460 | ||
461 | /* get user crypto info */ | |
ffa81fa4 YH |
462 | if (tx) { |
463 | crypto_info = &ctx->crypto_send.info; | |
464 | cctx = &ctx->tx; | |
465 | } else { | |
466 | crypto_info = &ctx->crypto_recv.info; | |
467 | cctx = &ctx->rx; | |
468 | } | |
3c4d7559 DW |
469 | |
470 | if (!TLS_CRYPTO_INFO_READY(crypto_info)) { | |
471 | rc = -EBUSY; | |
472 | goto out; | |
473 | } | |
474 | ||
5a3b886c | 475 | if (len == sizeof(*crypto_info)) { |
ac55cd61 DC |
476 | if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) |
477 | rc = -EFAULT; | |
3c4d7559 DW |
478 | goto out; |
479 | } | |
480 | ||
077e05d1 SD |
481 | cipher_desc = get_cipher_desc(crypto_info->cipher_type); |
482 | if (!cipher_desc || len != cipher_desc->crypto_info) { | |
3c4d7559 | 483 | rc = -EINVAL; |
077e05d1 | 484 | goto out; |
3c4d7559 DW |
485 | } |
486 | ||
077e05d1 SD |
487 | memcpy(crypto_info_iv(crypto_info, cipher_desc), |
488 | cctx->iv + cipher_desc->salt, cipher_desc->iv); | |
489 | memcpy(crypto_info_rec_seq(crypto_info, cipher_desc), | |
490 | cctx->rec_seq, cipher_desc->rec_seq); | |
491 | ||
492 | if (copy_to_user(optval, crypto_info, cipher_desc->crypto_info)) | |
493 | rc = -EFAULT; | |
494 | ||
3c4d7559 DW |
495 | out: |
496 | return rc; | |
497 | } | |
498 | ||
c1318b39 BP |
499 | static int do_tls_getsockopt_tx_zc(struct sock *sk, char __user *optval, |
500 | int __user *optlen) | |
501 | { | |
502 | struct tls_context *ctx = tls_get_ctx(sk); | |
503 | unsigned int value; | |
504 | int len; | |
505 | ||
506 | if (get_user(len, optlen)) | |
507 | return -EFAULT; | |
508 | ||
509 | if (len != sizeof(value)) | |
510 | return -EINVAL; | |
511 | ||
512 | value = ctx->zerocopy_sendfile; | |
513 | if (copy_to_user(optval, &value, sizeof(value))) | |
514 | return -EFAULT; | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
88527790 JK |
519 | static int do_tls_getsockopt_no_pad(struct sock *sk, char __user *optval, |
520 | int __user *optlen) | |
521 | { | |
522 | struct tls_context *ctx = tls_get_ctx(sk); | |
57128e98 | 523 | int value, len; |
88527790 JK |
524 | |
525 | if (ctx->prot_info.version != TLS_1_3_VERSION) | |
526 | return -EINVAL; | |
527 | ||
528 | if (get_user(len, optlen)) | |
529 | return -EFAULT; | |
530 | if (len < sizeof(value)) | |
531 | return -EINVAL; | |
532 | ||
57128e98 | 533 | value = -EINVAL; |
88527790 JK |
534 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) |
535 | value = ctx->rx_no_pad; | |
57128e98 JK |
536 | if (value < 0) |
537 | return value; | |
88527790 JK |
538 | |
539 | if (put_user(sizeof(value), optlen)) | |
540 | return -EFAULT; | |
541 | if (copy_to_user(optval, &value, sizeof(value))) | |
542 | return -EFAULT; | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
3c4d7559 DW |
547 | static int do_tls_getsockopt(struct sock *sk, int optname, |
548 | char __user *optval, int __user *optlen) | |
549 | { | |
550 | int rc = 0; | |
551 | ||
49c47cc2 HH |
552 | lock_sock(sk); |
553 | ||
3c4d7559 DW |
554 | switch (optname) { |
555 | case TLS_TX: | |
ffa81fa4 YH |
556 | case TLS_RX: |
557 | rc = do_tls_getsockopt_conf(sk, optval, optlen, | |
558 | optname == TLS_TX); | |
3c4d7559 | 559 | break; |
b489a6e5 | 560 | case TLS_TX_ZEROCOPY_RO: |
c1318b39 BP |
561 | rc = do_tls_getsockopt_tx_zc(sk, optval, optlen); |
562 | break; | |
88527790 JK |
563 | case TLS_RX_EXPECT_NO_PAD: |
564 | rc = do_tls_getsockopt_no_pad(sk, optval, optlen); | |
565 | break; | |
3c4d7559 DW |
566 | default: |
567 | rc = -ENOPROTOOPT; | |
568 | break; | |
569 | } | |
49c47cc2 HH |
570 | |
571 | release_sock(sk); | |
572 | ||
3c4d7559 DW |
573 | return rc; |
574 | } | |
575 | ||
576 | static int tls_getsockopt(struct sock *sk, int level, int optname, | |
577 | char __user *optval, int __user *optlen) | |
578 | { | |
579 | struct tls_context *ctx = tls_get_ctx(sk); | |
580 | ||
581 | if (level != SOL_TLS) | |
be7bbea1 JK |
582 | return ctx->sk_proto->getsockopt(sk, level, |
583 | optname, optval, optlen); | |
3c4d7559 DW |
584 | |
585 | return do_tls_getsockopt(sk, optname, optval, optlen); | |
586 | } | |
587 | ||
a7b75c5a | 588 | static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval, |
c46234eb | 589 | unsigned int optlen, int tx) |
3c4d7559 | 590 | { |
196c31b4 | 591 | struct tls_crypto_info *crypto_info; |
4509de14 | 592 | struct tls_crypto_info *alt_crypto_info; |
3c4d7559 | 593 | struct tls_context *ctx = tls_get_ctx(sk); |
5f309ade | 594 | const struct tls_cipher_desc *cipher_desc; |
3c4d7559 | 595 | int rc = 0; |
58371585 | 596 | int conf; |
3c4d7559 | 597 | |
1ddcbfbf ZX |
598 | if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) |
599 | return -EINVAL; | |
3c4d7559 | 600 | |
4509de14 | 601 | if (tx) { |
86029d10 | 602 | crypto_info = &ctx->crypto_send.info; |
4509de14 VG |
603 | alt_crypto_info = &ctx->crypto_recv.info; |
604 | } else { | |
86029d10 | 605 | crypto_info = &ctx->crypto_recv.info; |
4509de14 VG |
606 | alt_crypto_info = &ctx->crypto_send.info; |
607 | } | |
c46234eb | 608 | |
196c31b4 | 609 | /* Currently we don't support set crypto info more than one time */ |
1ddcbfbf ZX |
610 | if (TLS_CRYPTO_INFO_READY(crypto_info)) |
611 | return -EBUSY; | |
196c31b4 | 612 | |
a7b75c5a | 613 | rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info)); |
3c4d7559 DW |
614 | if (rc) { |
615 | rc = -EFAULT; | |
257082e6 | 616 | goto err_crypto_info; |
3c4d7559 DW |
617 | } |
618 | ||
619 | /* check version */ | |
130b392c DW |
620 | if (crypto_info->version != TLS_1_2_VERSION && |
621 | crypto_info->version != TLS_1_3_VERSION) { | |
4a5cdc60 | 622 | rc = -EINVAL; |
196c31b4 | 623 | goto err_crypto_info; |
3c4d7559 DW |
624 | } |
625 | ||
4509de14 VG |
626 | /* Ensure that TLS version and ciphers are same in both directions */ |
627 | if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { | |
628 | if (alt_crypto_info->version != crypto_info->version || | |
629 | alt_crypto_info->cipher_type != crypto_info->cipher_type) { | |
630 | rc = -EINVAL; | |
631 | goto err_crypto_info; | |
632 | } | |
633 | } | |
634 | ||
5f309ade SD |
635 | cipher_desc = get_cipher_desc(crypto_info->cipher_type); |
636 | if (!cipher_desc) { | |
637 | rc = -EINVAL; | |
638 | goto err_crypto_info; | |
3c4d7559 | 639 | } |
5f309ade SD |
640 | |
641 | switch (crypto_info->cipher_type) { | |
62e56ef5 | 642 | case TLS_CIPHER_ARIA_GCM_128: |
62e56ef5 TY |
643 | case TLS_CIPHER_ARIA_GCM_256: |
644 | if (crypto_info->version != TLS_1_2_VERSION) { | |
645 | rc = -EINVAL; | |
646 | goto err_crypto_info; | |
647 | } | |
62e56ef5 | 648 | break; |
3c4d7559 DW |
649 | } |
650 | ||
5f309ade | 651 | if (optlen != cipher_desc->crypto_info) { |
f295b3ae VG |
652 | rc = -EINVAL; |
653 | goto err_crypto_info; | |
654 | } | |
655 | ||
d3c48151 CH |
656 | rc = copy_from_sockptr_offset(crypto_info + 1, optval, |
657 | sizeof(*crypto_info), | |
658 | optlen - sizeof(*crypto_info)); | |
f295b3ae VG |
659 | if (rc) { |
660 | rc = -EFAULT; | |
661 | goto err_crypto_info; | |
662 | } | |
663 | ||
c46234eb | 664 | if (tx) { |
e8f69799 IL |
665 | rc = tls_set_device_offload(sk, ctx); |
666 | conf = TLS_HW; | |
b32fd3cc JK |
667 | if (!rc) { |
668 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE); | |
669 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); | |
670 | } else { | |
e8f69799 | 671 | rc = tls_set_sw_offload(sk, ctx, 1); |
318892ac JK |
672 | if (rc) |
673 | goto err_crypto_info; | |
b32fd3cc JK |
674 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW); |
675 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); | |
e8f69799 IL |
676 | conf = TLS_SW; |
677 | } | |
c46234eb | 678 | } else { |
4799ac81 BP |
679 | rc = tls_set_device_offload_rx(sk, ctx); |
680 | conf = TLS_HW; | |
b32fd3cc JK |
681 | if (!rc) { |
682 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE); | |
683 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); | |
684 | } else { | |
4799ac81 | 685 | rc = tls_set_sw_offload(sk, ctx, 0); |
318892ac JK |
686 | if (rc) |
687 | goto err_crypto_info; | |
b32fd3cc JK |
688 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW); |
689 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); | |
4799ac81 BP |
690 | conf = TLS_SW; |
691 | } | |
313ab004 | 692 | tls_sw_strparser_arm(sk, ctx); |
c46234eb DW |
693 | } |
694 | ||
f66de3ee BP |
695 | if (tx) |
696 | ctx->tx_conf = conf; | |
697 | else | |
698 | ctx->rx_conf = conf; | |
6d88207f | 699 | update_sk_prot(sk, ctx); |
c46234eb DW |
700 | if (tx) { |
701 | ctx->sk_write_space = sk->sk_write_space; | |
702 | sk->sk_write_space = tls_write_space; | |
84c61fe1 JK |
703 | } else { |
704 | struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(ctx); | |
705 | ||
706 | tls_strp_check_rcv(&rx_ctx->strp); | |
c46234eb | 707 | } |
1ddcbfbf | 708 | return 0; |
3c4d7559 DW |
709 | |
710 | err_crypto_info: | |
c844eb46 | 711 | memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); |
3c4d7559 DW |
712 | return rc; |
713 | } | |
714 | ||
c1318b39 BP |
715 | static int do_tls_setsockopt_tx_zc(struct sock *sk, sockptr_t optval, |
716 | unsigned int optlen) | |
717 | { | |
718 | struct tls_context *ctx = tls_get_ctx(sk); | |
719 | unsigned int value; | |
720 | ||
721 | if (sockptr_is_null(optval) || optlen != sizeof(value)) | |
722 | return -EINVAL; | |
723 | ||
724 | if (copy_from_sockptr(&value, optval, sizeof(value))) | |
725 | return -EFAULT; | |
726 | ||
727 | if (value > 1) | |
728 | return -EINVAL; | |
729 | ||
730 | ctx->zerocopy_sendfile = value; | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
88527790 JK |
735 | static int do_tls_setsockopt_no_pad(struct sock *sk, sockptr_t optval, |
736 | unsigned int optlen) | |
737 | { | |
738 | struct tls_context *ctx = tls_get_ctx(sk); | |
739 | u32 val; | |
740 | int rc; | |
741 | ||
742 | if (ctx->prot_info.version != TLS_1_3_VERSION || | |
743 | sockptr_is_null(optval) || optlen < sizeof(val)) | |
744 | return -EINVAL; | |
745 | ||
746 | rc = copy_from_sockptr(&val, optval, sizeof(val)); | |
747 | if (rc) | |
748 | return -EFAULT; | |
749 | if (val > 1) | |
750 | return -EINVAL; | |
751 | rc = check_zeroed_sockptr(optval, sizeof(val), optlen - sizeof(val)); | |
752 | if (rc < 1) | |
753 | return rc == 0 ? -EINVAL : rc; | |
754 | ||
755 | lock_sock(sk); | |
756 | rc = -EINVAL; | |
757 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) { | |
758 | ctx->rx_no_pad = val; | |
759 | tls_update_rx_zc_capable(ctx); | |
760 | rc = 0; | |
761 | } | |
762 | release_sock(sk); | |
763 | ||
764 | return rc; | |
765 | } | |
766 | ||
a7b75c5a CH |
767 | static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval, |
768 | unsigned int optlen) | |
3c4d7559 DW |
769 | { |
770 | int rc = 0; | |
771 | ||
772 | switch (optname) { | |
773 | case TLS_TX: | |
c46234eb | 774 | case TLS_RX: |
3c4d7559 | 775 | lock_sock(sk); |
c46234eb DW |
776 | rc = do_tls_setsockopt_conf(sk, optval, optlen, |
777 | optname == TLS_TX); | |
3c4d7559 DW |
778 | release_sock(sk); |
779 | break; | |
b489a6e5 | 780 | case TLS_TX_ZEROCOPY_RO: |
c1318b39 BP |
781 | lock_sock(sk); |
782 | rc = do_tls_setsockopt_tx_zc(sk, optval, optlen); | |
783 | release_sock(sk); | |
784 | break; | |
88527790 JK |
785 | case TLS_RX_EXPECT_NO_PAD: |
786 | rc = do_tls_setsockopt_no_pad(sk, optval, optlen); | |
787 | break; | |
3c4d7559 DW |
788 | default: |
789 | rc = -ENOPROTOOPT; | |
790 | break; | |
791 | } | |
792 | return rc; | |
793 | } | |
794 | ||
795 | static int tls_setsockopt(struct sock *sk, int level, int optname, | |
a7b75c5a | 796 | sockptr_t optval, unsigned int optlen) |
3c4d7559 DW |
797 | { |
798 | struct tls_context *ctx = tls_get_ctx(sk); | |
799 | ||
800 | if (level != SOL_TLS) | |
be7bbea1 JK |
801 | return ctx->sk_proto->setsockopt(sk, level, optname, optval, |
802 | optlen); | |
3c4d7559 DW |
803 | |
804 | return do_tls_setsockopt(sk, optname, optval, optlen); | |
805 | } | |
806 | ||
08700dab | 807 | struct tls_context *tls_ctx_create(struct sock *sk) |
dd0bed16 AG |
808 | { |
809 | struct inet_connection_sock *icsk = inet_csk(sk); | |
810 | struct tls_context *ctx; | |
811 | ||
c6ec179a | 812 | ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); |
dd0bed16 AG |
813 | if (!ctx) |
814 | return NULL; | |
815 | ||
79ffe608 | 816 | mutex_init(&ctx->tx_lock); |
15a7dea7 | 817 | rcu_assign_pointer(icsk->icsk_ulp_data, ctx); |
d5bee737 | 818 | ctx->sk_proto = READ_ONCE(sk->sk_prot); |
c55dcdd4 | 819 | ctx->sk = sk; |
dd0bed16 AG |
820 | return ctx; |
821 | } | |
822 | ||
f3911f73 JK |
823 | static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
824 | const struct proto_ops *base) | |
825 | { | |
826 | ops[TLS_BASE][TLS_BASE] = *base; | |
827 | ||
828 | ops[TLS_SW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; | |
df720d28 | 829 | ops[TLS_SW ][TLS_BASE].splice_eof = tls_sw_splice_eof; |
f3911f73 JK |
830 | |
831 | ops[TLS_BASE][TLS_SW ] = ops[TLS_BASE][TLS_BASE]; | |
832 | ops[TLS_BASE][TLS_SW ].splice_read = tls_sw_splice_read; | |
121dca78 | 833 | ops[TLS_BASE][TLS_SW ].poll = tls_sk_poll; |
662fbcec | 834 | ops[TLS_BASE][TLS_SW ].read_sock = tls_sw_read_sock; |
f3911f73 JK |
835 | |
836 | ops[TLS_SW ][TLS_SW ] = ops[TLS_SW ][TLS_BASE]; | |
837 | ops[TLS_SW ][TLS_SW ].splice_read = tls_sw_splice_read; | |
121dca78 | 838 | ops[TLS_SW ][TLS_SW ].poll = tls_sk_poll; |
662fbcec | 839 | ops[TLS_SW ][TLS_SW ].read_sock = tls_sw_read_sock; |
f3911f73 JK |
840 | |
841 | #ifdef CONFIG_TLS_DEVICE | |
842 | ops[TLS_HW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; | |
f3911f73 JK |
843 | |
844 | ops[TLS_HW ][TLS_SW ] = ops[TLS_BASE][TLS_SW ]; | |
f3911f73 JK |
845 | |
846 | ops[TLS_BASE][TLS_HW ] = ops[TLS_BASE][TLS_SW ]; | |
847 | ||
848 | ops[TLS_SW ][TLS_HW ] = ops[TLS_SW ][TLS_SW ]; | |
849 | ||
850 | ops[TLS_HW ][TLS_HW ] = ops[TLS_HW ][TLS_SW ]; | |
f3911f73 JK |
851 | #endif |
852 | #ifdef CONFIG_TLS_TOE | |
853 | ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base; | |
854 | #endif | |
855 | } | |
856 | ||
63a6b3fe AG |
857 | static void tls_build_proto(struct sock *sk) |
858 | { | |
859 | int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; | |
9a893949 | 860 | struct proto *prot = READ_ONCE(sk->sk_prot); |
63a6b3fe AG |
861 | |
862 | /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ | |
863 | if (ip_ver == TLSV6 && | |
5bb4c45d | 864 | unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) { |
63a6b3fe | 865 | mutex_lock(&tcpv6_prot_mutex); |
5bb4c45d JS |
866 | if (likely(prot != saved_tcpv6_prot)) { |
867 | build_protos(tls_prots[TLSV6], prot); | |
f3911f73 JK |
868 | build_proto_ops(tls_proto_ops[TLSV6], |
869 | sk->sk_socket->ops); | |
5bb4c45d | 870 | smp_store_release(&saved_tcpv6_prot, prot); |
63a6b3fe AG |
871 | } |
872 | mutex_unlock(&tcpv6_prot_mutex); | |
873 | } | |
874 | ||
875 | if (ip_ver == TLSV4 && | |
5bb4c45d | 876 | unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) { |
63a6b3fe | 877 | mutex_lock(&tcpv4_prot_mutex); |
5bb4c45d JS |
878 | if (likely(prot != saved_tcpv4_prot)) { |
879 | build_protos(tls_prots[TLSV4], prot); | |
f3911f73 JK |
880 | build_proto_ops(tls_proto_ops[TLSV4], |
881 | sk->sk_socket->ops); | |
5bb4c45d | 882 | smp_store_release(&saved_tcpv4_prot, prot); |
63a6b3fe AG |
883 | } |
884 | mutex_unlock(&tcpv4_prot_mutex); | |
885 | } | |
886 | } | |
887 | ||
f66de3ee | 888 | static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
f13fe3e6 | 889 | const struct proto *base) |
c113187d | 890 | { |
f66de3ee BP |
891 | prot[TLS_BASE][TLS_BASE] = *base; |
892 | prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; | |
893 | prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; | |
894 | prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; | |
895 | ||
896 | prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; | |
897 | prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; | |
df720d28 | 898 | prot[TLS_SW][TLS_BASE].splice_eof = tls_sw_splice_eof; |
f66de3ee BP |
899 | |
900 | prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; | |
924ad65e | 901 | prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; |
7b50ecfc | 902 | prot[TLS_BASE][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; |
924ad65e | 903 | prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; |
f66de3ee BP |
904 | |
905 | prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; | |
924ad65e | 906 | prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; |
7b50ecfc | 907 | prot[TLS_SW][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; |
924ad65e | 908 | prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; |
f66de3ee | 909 | |
e8f69799 IL |
910 | #ifdef CONFIG_TLS_DEVICE |
911 | prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; | |
912 | prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; | |
d4c1e80b | 913 | prot[TLS_HW][TLS_BASE].splice_eof = tls_device_splice_eof; |
e8f69799 IL |
914 | |
915 | prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; | |
916 | prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; | |
d4c1e80b | 917 | prot[TLS_HW][TLS_SW].splice_eof = tls_device_splice_eof; |
4799ac81 BP |
918 | |
919 | prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; | |
920 | ||
921 | prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; | |
922 | ||
923 | prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; | |
e8f69799 | 924 | #endif |
53b4414a | 925 | #ifdef CONFIG_TLS_TOE |
f66de3ee | 926 | prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; |
0eb8745e JK |
927 | prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash; |
928 | prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash; | |
53b4414a | 929 | #endif |
c113187d BP |
930 | } |
931 | ||
3c4d7559 DW |
932 | static int tls_init(struct sock *sk) |
933 | { | |
3c4d7559 DW |
934 | struct tls_context *ctx; |
935 | int rc = 0; | |
936 | ||
16bed0e6 JK |
937 | tls_build_proto(sk); |
938 | ||
53b4414a | 939 | #ifdef CONFIG_TLS_TOE |
0eb8745e | 940 | if (tls_toe_bypass(sk)) |
95fa1454 | 941 | return 0; |
53b4414a | 942 | #endif |
dd0bed16 | 943 | |
d91c3e17 IL |
944 | /* The TLS ulp is currently supported only for TCP sockets |
945 | * in ESTABLISHED state. | |
946 | * Supporting sockets in LISTEN state will require us | |
947 | * to modify the accept implementation to clone rather then | |
948 | * share the ulp context. | |
949 | */ | |
950 | if (sk->sk_state != TCP_ESTABLISHED) | |
4a5cdc60 | 951 | return -ENOTCONN; |
d91c3e17 | 952 | |
3c4d7559 | 953 | /* allocate tls context */ |
95fa1454 | 954 | write_lock_bh(&sk->sk_callback_lock); |
08700dab | 955 | ctx = tls_ctx_create(sk); |
3c4d7559 DW |
956 | if (!ctx) { |
957 | rc = -ENOMEM; | |
958 | goto out; | |
959 | } | |
6d88207f | 960 | |
f66de3ee BP |
961 | ctx->tx_conf = TLS_BASE; |
962 | ctx->rx_conf = TLS_BASE; | |
6d88207f | 963 | update_sk_prot(sk, ctx); |
3c4d7559 | 964 | out: |
95fa1454 | 965 | write_unlock_bh(&sk->sk_callback_lock); |
3c4d7559 DW |
966 | return rc; |
967 | } | |
968 | ||
33bfe20d JF |
969 | static void tls_update(struct sock *sk, struct proto *p, |
970 | void (*write_space)(struct sock *sk)) | |
95fa1454 JF |
971 | { |
972 | struct tls_context *ctx; | |
973 | ||
e34a07c0 JK |
974 | WARN_ON_ONCE(sk->sk_prot == p); |
975 | ||
95fa1454 | 976 | ctx = tls_get_ctx(sk); |
33bfe20d JF |
977 | if (likely(ctx)) { |
978 | ctx->sk_write_space = write_space; | |
95fa1454 | 979 | ctx->sk_proto = p; |
33bfe20d | 980 | } else { |
b8e202d1 JS |
981 | /* Pairs with lockless read in sk_clone_lock(). */ |
982 | WRITE_ONCE(sk->sk_prot, p); | |
33bfe20d JF |
983 | sk->sk_write_space = write_space; |
984 | } | |
95fa1454 JF |
985 | } |
986 | ||
58790314 JK |
987 | static u16 tls_user_config(struct tls_context *ctx, bool tx) |
988 | { | |
989 | u16 config = tx ? ctx->tx_conf : ctx->rx_conf; | |
990 | ||
991 | switch (config) { | |
992 | case TLS_BASE: | |
993 | return TLS_CONF_BASE; | |
994 | case TLS_SW: | |
995 | return TLS_CONF_SW; | |
996 | case TLS_HW: | |
997 | return TLS_CONF_HW; | |
998 | case TLS_HW_RECORD: | |
999 | return TLS_CONF_HW_RECORD; | |
1000 | } | |
1001 | return 0; | |
1002 | } | |
1003 | ||
26811cc9 DC |
1004 | static int tls_get_info(const struct sock *sk, struct sk_buff *skb) |
1005 | { | |
1006 | u16 version, cipher_type; | |
1007 | struct tls_context *ctx; | |
1008 | struct nlattr *start; | |
1009 | int err; | |
1010 | ||
1011 | start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS); | |
1012 | if (!start) | |
1013 | return -EMSGSIZE; | |
1014 | ||
1015 | rcu_read_lock(); | |
1016 | ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data); | |
1017 | if (!ctx) { | |
1018 | err = 0; | |
1019 | goto nla_failure; | |
1020 | } | |
1021 | version = ctx->prot_info.version; | |
1022 | if (version) { | |
1023 | err = nla_put_u16(skb, TLS_INFO_VERSION, version); | |
1024 | if (err) | |
1025 | goto nla_failure; | |
1026 | } | |
1027 | cipher_type = ctx->prot_info.cipher_type; | |
1028 | if (cipher_type) { | |
1029 | err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type); | |
1030 | if (err) | |
1031 | goto nla_failure; | |
1032 | } | |
1033 | err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true)); | |
1034 | if (err) | |
1035 | goto nla_failure; | |
1036 | ||
1037 | err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false)); | |
1038 | if (err) | |
1039 | goto nla_failure; | |
1040 | ||
c1318b39 | 1041 | if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) { |
b489a6e5 | 1042 | err = nla_put_flag(skb, TLS_INFO_ZC_RO_TX); |
c1318b39 BP |
1043 | if (err) |
1044 | goto nla_failure; | |
1045 | } | |
88527790 JK |
1046 | if (ctx->rx_no_pad) { |
1047 | err = nla_put_flag(skb, TLS_INFO_RX_NO_PAD); | |
1048 | if (err) | |
1049 | goto nla_failure; | |
1050 | } | |
c1318b39 | 1051 | |
26811cc9 DC |
1052 | rcu_read_unlock(); |
1053 | nla_nest_end(skb, start); | |
1054 | return 0; | |
1055 | ||
1056 | nla_failure: | |
1057 | rcu_read_unlock(); | |
1058 | nla_nest_cancel(skb, start); | |
1059 | return err; | |
1060 | } | |
1061 | ||
1062 | static size_t tls_get_info_size(const struct sock *sk) | |
1063 | { | |
1064 | size_t size = 0; | |
1065 | ||
1066 | size += nla_total_size(0) + /* INET_ULP_INFO_TLS */ | |
1067 | nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */ | |
1068 | nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */ | |
1069 | nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */ | |
1070 | nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */ | |
b489a6e5 | 1071 | nla_total_size(0) + /* TLS_INFO_ZC_RO_TX */ |
88527790 | 1072 | nla_total_size(0) + /* TLS_INFO_RX_NO_PAD */ |
26811cc9 DC |
1073 | 0; |
1074 | ||
1075 | return size; | |
1076 | } | |
1077 | ||
d26b698d JK |
1078 | static int __net_init tls_init_net(struct net *net) |
1079 | { | |
1080 | int err; | |
1081 | ||
1082 | net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib); | |
1083 | if (!net->mib.tls_statistics) | |
1084 | return -ENOMEM; | |
1085 | ||
1086 | err = tls_proc_init(net); | |
1087 | if (err) | |
1088 | goto err_free_stats; | |
1089 | ||
1090 | return 0; | |
1091 | err_free_stats: | |
1092 | free_percpu(net->mib.tls_statistics); | |
1093 | return err; | |
1094 | } | |
1095 | ||
1096 | static void __net_exit tls_exit_net(struct net *net) | |
1097 | { | |
1098 | tls_proc_fini(net); | |
1099 | free_percpu(net->mib.tls_statistics); | |
1100 | } | |
1101 | ||
1102 | static struct pernet_operations tls_proc_ops = { | |
1103 | .init = tls_init_net, | |
1104 | .exit = tls_exit_net, | |
1105 | }; | |
1106 | ||
3c4d7559 DW |
1107 | static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { |
1108 | .name = "tls", | |
1109 | .owner = THIS_MODULE, | |
1110 | .init = tls_init, | |
95fa1454 | 1111 | .update = tls_update, |
26811cc9 DC |
1112 | .get_info = tls_get_info, |
1113 | .get_info_size = tls_get_info_size, | |
3c4d7559 DW |
1114 | }; |
1115 | ||
1116 | static int __init tls_register(void) | |
1117 | { | |
d26b698d JK |
1118 | int err; |
1119 | ||
1120 | err = register_pernet_subsys(&tls_proc_ops); | |
1121 | if (err) | |
1122 | return err; | |
1123 | ||
84c61fe1 JK |
1124 | err = tls_strp_dev_init(); |
1125 | if (err) | |
1126 | goto err_pernet; | |
1127 | ||
3d8c51b2 | 1128 | err = tls_device_init(); |
84c61fe1 JK |
1129 | if (err) |
1130 | goto err_strp; | |
3d8c51b2 | 1131 | |
3c4d7559 DW |
1132 | tcp_register_ulp(&tcp_tls_ulp_ops); |
1133 | ||
1134 | return 0; | |
84c61fe1 JK |
1135 | err_strp: |
1136 | tls_strp_dev_exit(); | |
1137 | err_pernet: | |
1138 | unregister_pernet_subsys(&tls_proc_ops); | |
1139 | return err; | |
3c4d7559 DW |
1140 | } |
1141 | ||
1142 | static void __exit tls_unregister(void) | |
1143 | { | |
1144 | tcp_unregister_ulp(&tcp_tls_ulp_ops); | |
84c61fe1 | 1145 | tls_strp_dev_exit(); |
e8f69799 | 1146 | tls_device_cleanup(); |
d26b698d | 1147 | unregister_pernet_subsys(&tls_proc_ops); |
3c4d7559 DW |
1148 | } |
1149 | ||
1150 | module_init(tls_register); | |
1151 | module_exit(tls_unregister); |