Commit | Line | Data |
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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 | 61 | #define CHECK_CIPHER_DESC(cipher,ci) \ |
bee6b7b3 | 62 | static_assert(cipher ## _IV_SIZE <= TLS_MAX_IV_SIZE); \ |
1c1cb311 | 63 | static_assert(cipher ## _SALT_SIZE <= TLS_MAX_SALT_SIZE); \ |
0d98cc02 SD |
64 | static_assert(cipher ## _REC_SEQ_SIZE <= TLS_MAX_REC_SEQ_SIZE); \ |
65 | static_assert(cipher ## _TAG_SIZE == TLS_TAG_SIZE); \ | |
66 | static_assert(sizeof_field(struct ci, iv) == cipher ## _IV_SIZE); \ | |
67 | static_assert(sizeof_field(struct ci, key) == cipher ## _KEY_SIZE); \ | |
68 | static_assert(sizeof_field(struct ci, salt) == cipher ## _SALT_SIZE); \ | |
69 | static_assert(sizeof_field(struct ci, rec_seq) == cipher ## _REC_SEQ_SIZE); | |
70 | ||
176a3f50 SD |
71 | #define __CIPHER_DESC(ci) \ |
72 | .iv_offset = offsetof(struct ci, iv), \ | |
73 | .key_offset = offsetof(struct ci, key), \ | |
74 | .salt_offset = offsetof(struct ci, salt), \ | |
75 | .rec_seq_offset = offsetof(struct ci, rec_seq), \ | |
76 | .crypto_info = sizeof(struct ci) | |
77 | ||
78 | #define CIPHER_DESC(cipher,ci,algname,_offloadable) [cipher - TLS_CIPHER_MIN] = { \ | |
79 | .nonce = cipher ## _IV_SIZE, \ | |
80 | .iv = cipher ## _IV_SIZE, \ | |
81 | .key = cipher ## _KEY_SIZE, \ | |
82 | .salt = cipher ## _SALT_SIZE, \ | |
83 | .tag = cipher ## _TAG_SIZE, \ | |
84 | .rec_seq = cipher ## _REC_SEQ_SIZE, \ | |
85 | .cipher_name = algname, \ | |
86 | .offloadable = _offloadable, \ | |
87 | __CIPHER_DESC(ci), \ | |
88 | } | |
89 | ||
90 | #define CIPHER_DESC_NONCE0(cipher,ci,algname,_offloadable) [cipher - TLS_CIPHER_MIN] = { \ | |
91 | .nonce = 0, \ | |
2d2c5ea2 TT |
92 | .iv = cipher ## _IV_SIZE, \ |
93 | .key = cipher ## _KEY_SIZE, \ | |
94 | .salt = cipher ## _SALT_SIZE, \ | |
95 | .tag = cipher ## _TAG_SIZE, \ | |
96 | .rec_seq = cipher ## _REC_SEQ_SIZE, \ | |
176a3f50 SD |
97 | .cipher_name = algname, \ |
98 | .offloadable = _offloadable, \ | |
99 | __CIPHER_DESC(ci), \ | |
2d2c5ea2 TT |
100 | } |
101 | ||
8db44ab2 | 102 | const struct tls_cipher_desc tls_cipher_desc[TLS_CIPHER_MAX + 1 - TLS_CIPHER_MIN] = { |
176a3f50 SD |
103 | CIPHER_DESC(TLS_CIPHER_AES_GCM_128, tls12_crypto_info_aes_gcm_128, "gcm(aes)", true), |
104 | CIPHER_DESC(TLS_CIPHER_AES_GCM_256, tls12_crypto_info_aes_gcm_256, "gcm(aes)", true), | |
105 | CIPHER_DESC(TLS_CIPHER_AES_CCM_128, tls12_crypto_info_aes_ccm_128, "ccm(aes)", false), | |
106 | CIPHER_DESC_NONCE0(TLS_CIPHER_CHACHA20_POLY1305, tls12_crypto_info_chacha20_poly1305, "rfc7539(chacha20,poly1305)", false), | |
107 | CIPHER_DESC(TLS_CIPHER_SM4_GCM, tls12_crypto_info_sm4_gcm, "gcm(sm4)", false), | |
108 | CIPHER_DESC(TLS_CIPHER_SM4_CCM, tls12_crypto_info_sm4_ccm, "ccm(sm4)", false), | |
109 | CIPHER_DESC(TLS_CIPHER_ARIA_GCM_128, tls12_crypto_info_aria_gcm_128, "gcm(aria)", false), | |
110 | CIPHER_DESC(TLS_CIPHER_ARIA_GCM_256, tls12_crypto_info_aria_gcm_256, "gcm(aria)", false), | |
2d2c5ea2 TT |
111 | }; |
112 | ||
0d98cc02 SD |
113 | CHECK_CIPHER_DESC(TLS_CIPHER_AES_GCM_128, tls12_crypto_info_aes_gcm_128); |
114 | CHECK_CIPHER_DESC(TLS_CIPHER_AES_GCM_256, tls12_crypto_info_aes_gcm_256); | |
115 | CHECK_CIPHER_DESC(TLS_CIPHER_AES_CCM_128, tls12_crypto_info_aes_ccm_128); | |
116 | CHECK_CIPHER_DESC(TLS_CIPHER_CHACHA20_POLY1305, tls12_crypto_info_chacha20_poly1305); | |
117 | CHECK_CIPHER_DESC(TLS_CIPHER_SM4_GCM, tls12_crypto_info_sm4_gcm); | |
118 | CHECK_CIPHER_DESC(TLS_CIPHER_SM4_CCM, tls12_crypto_info_sm4_ccm); | |
119 | CHECK_CIPHER_DESC(TLS_CIPHER_ARIA_GCM_128, tls12_crypto_info_aria_gcm_128); | |
120 | CHECK_CIPHER_DESC(TLS_CIPHER_ARIA_GCM_256, tls12_crypto_info_aria_gcm_256); | |
121 | ||
f691a25c | 122 | static const struct proto *saved_tcpv6_prot; |
c113187d | 123 | static DEFINE_MUTEX(tcpv6_prot_mutex); |
f691a25c | 124 | static const struct proto *saved_tcpv4_prot; |
28cb6f1e | 125 | static DEFINE_MUTEX(tcpv4_prot_mutex); |
f66de3ee | 126 | static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; |
f3911f73 | 127 | static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; |
63a6b3fe | 128 | static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
f13fe3e6 | 129 | const struct proto *base); |
6d88207f | 130 | |
08700dab | 131 | void update_sk_prot(struct sock *sk, struct tls_context *ctx) |
6d88207f | 132 | { |
c113187d BP |
133 | int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; |
134 | ||
d5bee737 JS |
135 | WRITE_ONCE(sk->sk_prot, |
136 | &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]); | |
f3911f73 JK |
137 | WRITE_ONCE(sk->sk_socket->ops, |
138 | &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]); | |
6d88207f | 139 | } |
3c4d7559 DW |
140 | |
141 | int wait_on_pending_writer(struct sock *sk, long *timeo) | |
142 | { | |
3c4d7559 | 143 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
419ce133 | 144 | int ret, rc = 0; |
3c4d7559 DW |
145 | |
146 | add_wait_queue(sk_sleep(sk), &wait); | |
147 | while (1) { | |
148 | if (!*timeo) { | |
149 | rc = -EAGAIN; | |
150 | break; | |
151 | } | |
152 | ||
153 | if (signal_pending(current)) { | |
154 | rc = sock_intr_errno(*timeo); | |
155 | break; | |
156 | } | |
157 | ||
419ce133 PA |
158 | ret = sk_wait_event(sk, timeo, |
159 | !READ_ONCE(sk->sk_write_pending), &wait); | |
160 | if (ret) { | |
161 | if (ret < 0) | |
162 | rc = ret; | |
3c4d7559 | 163 | break; |
419ce133 | 164 | } |
3c4d7559 DW |
165 | } |
166 | remove_wait_queue(sk_sleep(sk), &wait); | |
167 | return rc; | |
168 | } | |
169 | ||
170 | int tls_push_sg(struct sock *sk, | |
171 | struct tls_context *ctx, | |
172 | struct scatterlist *sg, | |
173 | u16 first_offset, | |
174 | int flags) | |
175 | { | |
e117dcfd DH |
176 | struct bio_vec bvec; |
177 | struct msghdr msg = { | |
b848b26c | 178 | .msg_flags = MSG_SPLICE_PAGES | flags, |
e117dcfd | 179 | }; |
3c4d7559 DW |
180 | int ret = 0; |
181 | struct page *p; | |
182 | size_t size; | |
183 | int offset = first_offset; | |
184 | ||
185 | size = sg->length - offset; | |
186 | offset += sg->offset; | |
187 | ||
e117dcfd | 188 | ctx->splicing_pages = true; |
3c4d7559 | 189 | while (1) { |
3c4d7559 DW |
190 | /* is sending application-limited? */ |
191 | tcp_rate_check_app_limited(sk); | |
192 | p = sg_page(sg); | |
193 | retry: | |
e117dcfd DH |
194 | bvec_set_page(&bvec, p, size, offset); |
195 | iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size); | |
196 | ||
197 | ret = tcp_sendmsg_locked(sk, &msg, size); | |
3c4d7559 DW |
198 | |
199 | if (ret != size) { | |
200 | if (ret > 0) { | |
201 | offset += ret; | |
202 | size -= ret; | |
203 | goto retry; | |
204 | } | |
205 | ||
206 | offset -= sg->offset; | |
207 | ctx->partially_sent_offset = offset; | |
208 | ctx->partially_sent_record = (void *)sg; | |
e117dcfd | 209 | ctx->splicing_pages = false; |
3c4d7559 DW |
210 | return ret; |
211 | } | |
212 | ||
213 | put_page(p); | |
214 | sk_mem_uncharge(sk, sg->length); | |
215 | sg = sg_next(sg); | |
216 | if (!sg) | |
217 | break; | |
218 | ||
219 | offset = sg->offset; | |
220 | size = sg->length; | |
221 | } | |
222 | ||
e117dcfd | 223 | ctx->splicing_pages = false; |
3c4d7559 DW |
224 | |
225 | return 0; | |
226 | } | |
227 | ||
228 | static int tls_handle_open_record(struct sock *sk, int flags) | |
229 | { | |
230 | struct tls_context *ctx = tls_get_ctx(sk); | |
231 | ||
232 | if (tls_is_pending_open_record(ctx)) | |
233 | return ctx->push_pending_record(sk, flags); | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
58790314 JK |
238 | int tls_process_cmsg(struct sock *sk, struct msghdr *msg, |
239 | unsigned char *record_type) | |
3c4d7559 DW |
240 | { |
241 | struct cmsghdr *cmsg; | |
242 | int rc = -EINVAL; | |
243 | ||
244 | for_each_cmsghdr(cmsg, msg) { | |
245 | if (!CMSG_OK(msg, cmsg)) | |
246 | return -EINVAL; | |
247 | if (cmsg->cmsg_level != SOL_TLS) | |
248 | continue; | |
249 | ||
250 | switch (cmsg->cmsg_type) { | |
251 | case TLS_SET_RECORD_TYPE: | |
252 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) | |
253 | return -EINVAL; | |
254 | ||
255 | if (msg->msg_flags & MSG_MORE) | |
256 | return -EINVAL; | |
257 | ||
258 | rc = tls_handle_open_record(sk, msg->msg_flags); | |
259 | if (rc) | |
260 | return rc; | |
261 | ||
262 | *record_type = *(unsigned char *)CMSG_DATA(cmsg); | |
263 | rc = 0; | |
264 | break; | |
265 | default: | |
266 | return -EINVAL; | |
267 | } | |
268 | } | |
269 | ||
270 | return rc; | |
271 | } | |
272 | ||
a42055e8 VG |
273 | int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
274 | int flags) | |
3c4d7559 DW |
275 | { |
276 | struct scatterlist *sg; | |
277 | u16 offset; | |
278 | ||
3c4d7559 DW |
279 | sg = ctx->partially_sent_record; |
280 | offset = ctx->partially_sent_offset; | |
281 | ||
282 | ctx->partially_sent_record = NULL; | |
283 | return tls_push_sg(sk, ctx, sg, offset, flags); | |
284 | } | |
285 | ||
c5daa6cc | 286 | void tls_free_partial_record(struct sock *sk, struct tls_context *ctx) |
35b71a34 JK |
287 | { |
288 | struct scatterlist *sg; | |
289 | ||
c5daa6cc | 290 | for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) { |
35b71a34 JK |
291 | put_page(sg_page(sg)); |
292 | sk_mem_uncharge(sk, sg->length); | |
35b71a34 JK |
293 | } |
294 | ctx->partially_sent_record = NULL; | |
35b71a34 JK |
295 | } |
296 | ||
3c4d7559 DW |
297 | static void tls_write_space(struct sock *sk) |
298 | { | |
299 | struct tls_context *ctx = tls_get_ctx(sk); | |
300 | ||
e117dcfd | 301 | /* If splicing_pages call lower protocol write space handler |
67db7cd2 | 302 | * to ensure we wake up any waiting operations there. For example |
e117dcfd | 303 | * if splicing pages where to call sk_wait_event. |
67db7cd2 | 304 | */ |
e117dcfd | 305 | if (ctx->splicing_pages) { |
67db7cd2 | 306 | ctx->sk_write_space(sk); |
c212d2c7 | 307 | return; |
67db7cd2 | 308 | } |
c212d2c7 | 309 | |
7463d3a2 BP |
310 | #ifdef CONFIG_TLS_DEVICE |
311 | if (ctx->tx_conf == TLS_HW) | |
312 | tls_device_write_space(sk, ctx); | |
313 | else | |
314 | #endif | |
315 | tls_sw_write_space(sk, ctx); | |
4504ab0e VG |
316 | |
317 | ctx->sk_write_space(sk); | |
3c4d7559 DW |
318 | } |
319 | ||
15a7dea7 JK |
320 | /** |
321 | * tls_ctx_free() - free TLS ULP context | |
322 | * @sk: socket to with @ctx is attached | |
323 | * @ctx: TLS context structure | |
324 | * | |
325 | * Free TLS context. If @sk is %NULL caller guarantees that the socket | |
326 | * to which @ctx was attached has no outstanding references. | |
327 | */ | |
328 | void tls_ctx_free(struct sock *sk, struct tls_context *ctx) | |
86029d10 SD |
329 | { |
330 | if (!ctx) | |
331 | return; | |
332 | ||
333 | memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); | |
334 | memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); | |
79ffe608 | 335 | mutex_destroy(&ctx->tx_lock); |
15a7dea7 JK |
336 | |
337 | if (sk) | |
338 | kfree_rcu(ctx, rcu); | |
339 | else | |
340 | kfree(ctx); | |
86029d10 SD |
341 | } |
342 | ||
313ab004 JF |
343 | static void tls_sk_proto_cleanup(struct sock *sk, |
344 | struct tls_context *ctx, long timeo) | |
3c4d7559 | 345 | { |
9354544c DM |
346 | if (unlikely(sk->sk_write_pending) && |
347 | !wait_on_pending_writer(sk, &timeo)) | |
3c4d7559 DW |
348 | tls_handle_open_record(sk, 0); |
349 | ||
f66de3ee BP |
350 | /* We need these for tls_sw_fallback handling of other packets */ |
351 | if (ctx->tx_conf == TLS_SW) { | |
313ab004 | 352 | tls_sw_release_resources_tx(sk); |
b32fd3cc | 353 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); |
35b71a34 JK |
354 | } else if (ctx->tx_conf == TLS_HW) { |
355 | tls_device_free_resources_tx(sk); | |
b32fd3cc | 356 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); |
f66de3ee | 357 | } |
3c4d7559 | 358 | |
b32fd3cc | 359 | if (ctx->rx_conf == TLS_SW) { |
313ab004 | 360 | tls_sw_release_resources_rx(sk); |
b32fd3cc JK |
361 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); |
362 | } else if (ctx->rx_conf == TLS_HW) { | |
4799ac81 | 363 | tls_device_offload_cleanup_rx(sk); |
b32fd3cc JK |
364 | TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); |
365 | } | |
313ab004 JF |
366 | } |
367 | ||
368 | static void tls_sk_proto_close(struct sock *sk, long timeout) | |
369 | { | |
95fa1454 | 370 | struct inet_connection_sock *icsk = inet_csk(sk); |
313ab004 JF |
371 | struct tls_context *ctx = tls_get_ctx(sk); |
372 | long timeo = sock_sndtimeo(sk, 0); | |
373 | bool free_ctx; | |
374 | ||
375 | if (ctx->tx_conf == TLS_SW) | |
376 | tls_sw_cancel_work_tx(ctx); | |
377 | ||
378 | lock_sock(sk); | |
379 | free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW; | |
313ab004 JF |
380 | |
381 | if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE) | |
382 | tls_sk_proto_cleanup(sk, ctx, timeo); | |
e8f69799 | 383 | |
95fa1454 JF |
384 | write_lock_bh(&sk->sk_callback_lock); |
385 | if (free_ctx) | |
15a7dea7 | 386 | rcu_assign_pointer(icsk->icsk_ulp_data, NULL); |
d5bee737 | 387 | WRITE_ONCE(sk->sk_prot, ctx->sk_proto); |
d85f0177 JF |
388 | if (sk->sk_write_space == tls_write_space) |
389 | sk->sk_write_space = ctx->sk_write_space; | |
95fa1454 | 390 | write_unlock_bh(&sk->sk_callback_lock); |
3c4d7559 | 391 | release_sock(sk); |
313ab004 JF |
392 | if (ctx->tx_conf == TLS_SW) |
393 | tls_sw_free_ctx_tx(ctx); | |
394 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) | |
395 | tls_sw_strparser_done(ctx); | |
396 | if (ctx->rx_conf == TLS_SW) | |
397 | tls_sw_free_ctx_rx(ctx); | |
be7bbea1 | 398 | ctx->sk_proto->close(sk, timeout); |
313ab004 | 399 | |
98f0a395 | 400 | if (free_ctx) |
15a7dea7 | 401 | tls_ctx_free(sk, ctx); |
3c4d7559 DW |
402 | } |
403 | ||
121dca78 JK |
404 | static __poll_t tls_sk_poll(struct file *file, struct socket *sock, |
405 | struct poll_table_struct *wait) | |
406 | { | |
407 | struct tls_sw_context_rx *ctx; | |
408 | struct tls_context *tls_ctx; | |
409 | struct sock *sk = sock->sk; | |
410 | struct sk_psock *psock; | |
411 | __poll_t mask = 0; | |
412 | u8 shutdown; | |
413 | int state; | |
414 | ||
415 | mask = tcp_poll(file, sock, wait); | |
416 | ||
417 | state = inet_sk_state_load(sk); | |
418 | shutdown = READ_ONCE(sk->sk_shutdown); | |
419 | if (unlikely(state != TCP_ESTABLISHED || shutdown & RCV_SHUTDOWN)) | |
420 | return mask; | |
421 | ||
422 | tls_ctx = tls_get_ctx(sk); | |
423 | ctx = tls_sw_ctx_rx(tls_ctx); | |
424 | psock = sk_psock_get(sk); | |
425 | ||
47069594 SD |
426 | if ((skb_queue_empty_lockless(&ctx->rx_list) && |
427 | !tls_strp_msg_ready(ctx) && | |
428 | sk_psock_queue_empty(psock)) || | |
429 | READ_ONCE(ctx->key_update_pending)) | |
121dca78 JK |
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 | ||
1cf7fbce SD |
588 | static int validate_crypto_info(const struct tls_crypto_info *crypto_info, |
589 | const struct tls_crypto_info *alt_crypto_info) | |
590 | { | |
591 | if (crypto_info->version != TLS_1_2_VERSION && | |
592 | crypto_info->version != TLS_1_3_VERSION) | |
593 | return -EINVAL; | |
594 | ||
595 | switch (crypto_info->cipher_type) { | |
596 | case TLS_CIPHER_ARIA_GCM_128: | |
597 | case TLS_CIPHER_ARIA_GCM_256: | |
598 | if (crypto_info->version != TLS_1_2_VERSION) | |
599 | return -EINVAL; | |
600 | break; | |
601 | } | |
602 | ||
603 | /* Ensure that TLS version and ciphers are same in both directions */ | |
604 | if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { | |
605 | if (alt_crypto_info->version != crypto_info->version || | |
606 | alt_crypto_info->cipher_type != crypto_info->cipher_type) | |
607 | return -EINVAL; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
a7b75c5a | 613 | static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval, |
c46234eb | 614 | unsigned int optlen, int tx) |
3c4d7559 | 615 | { |
47069594 SD |
616 | struct tls_crypto_info *crypto_info, *alt_crypto_info; |
617 | struct tls_crypto_info *old_crypto_info = NULL; | |
3c4d7559 | 618 | struct tls_context *ctx = tls_get_ctx(sk); |
5f309ade | 619 | const struct tls_cipher_desc *cipher_desc; |
0d9e699d | 620 | union tls_crypto_context *crypto_ctx; |
47069594 SD |
621 | union tls_crypto_context tmp = {}; |
622 | bool update = false; | |
3c4d7559 | 623 | int rc = 0; |
58371585 | 624 | int conf; |
3c4d7559 | 625 | |
1ddcbfbf ZX |
626 | if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) |
627 | return -EINVAL; | |
3c4d7559 | 628 | |
4509de14 | 629 | if (tx) { |
0d9e699d | 630 | crypto_ctx = &ctx->crypto_send; |
4509de14 VG |
631 | alt_crypto_info = &ctx->crypto_recv.info; |
632 | } else { | |
0d9e699d | 633 | crypto_ctx = &ctx->crypto_recv; |
4509de14 VG |
634 | alt_crypto_info = &ctx->crypto_send.info; |
635 | } | |
c46234eb | 636 | |
0d9e699d SH |
637 | crypto_info = &crypto_ctx->info; |
638 | ||
47069594 SD |
639 | if (TLS_CRYPTO_INFO_READY(crypto_info)) { |
640 | /* Currently we only support setting crypto info more | |
641 | * than one time for TLS 1.3 | |
642 | */ | |
510128b3 SD |
643 | if (crypto_info->version != TLS_1_3_VERSION) { |
644 | TLS_INC_STATS(sock_net(sk), tx ? LINUX_MIB_TLSTXREKEYERROR | |
645 | : LINUX_MIB_TLSRXREKEYERROR); | |
47069594 | 646 | return -EBUSY; |
510128b3 | 647 | } |
47069594 SD |
648 | |
649 | update = true; | |
650 | old_crypto_info = crypto_info; | |
651 | crypto_info = &tmp.info; | |
652 | crypto_ctx = &tmp; | |
653 | } | |
196c31b4 | 654 | |
a7b75c5a | 655 | rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info)); |
3c4d7559 DW |
656 | if (rc) { |
657 | rc = -EFAULT; | |
257082e6 | 658 | goto err_crypto_info; |
3c4d7559 DW |
659 | } |
660 | ||
47069594 SD |
661 | if (update) { |
662 | /* Ensure that TLS version and ciphers are not modified */ | |
663 | if (crypto_info->version != old_crypto_info->version || | |
664 | crypto_info->cipher_type != old_crypto_info->cipher_type) | |
665 | rc = -EINVAL; | |
666 | } else { | |
667 | rc = validate_crypto_info(crypto_info, alt_crypto_info); | |
668 | } | |
1cf7fbce | 669 | if (rc) |
196c31b4 | 670 | goto err_crypto_info; |
4509de14 | 671 | |
5f309ade SD |
672 | cipher_desc = get_cipher_desc(crypto_info->cipher_type); |
673 | if (!cipher_desc) { | |
674 | rc = -EINVAL; | |
675 | goto err_crypto_info; | |
3c4d7559 | 676 | } |
5f309ade | 677 | |
5f309ade | 678 | if (optlen != cipher_desc->crypto_info) { |
f295b3ae VG |
679 | rc = -EINVAL; |
680 | goto err_crypto_info; | |
681 | } | |
682 | ||
d3c48151 CH |
683 | rc = copy_from_sockptr_offset(crypto_info + 1, optval, |
684 | sizeof(*crypto_info), | |
685 | optlen - sizeof(*crypto_info)); | |
f295b3ae VG |
686 | if (rc) { |
687 | rc = -EFAULT; | |
688 | goto err_crypto_info; | |
689 | } | |
690 | ||
c46234eb | 691 | if (tx) { |
4f486699 | 692 | rc = tls_set_device_offload(sk); |
e8f69799 | 693 | conf = TLS_HW; |
b32fd3cc JK |
694 | if (!rc) { |
695 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE); | |
696 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); | |
697 | } else { | |
47069594 SD |
698 | rc = tls_set_sw_offload(sk, 1, |
699 | update ? crypto_info : NULL); | |
318892ac JK |
700 | if (rc) |
701 | goto err_crypto_info; | |
510128b3 SD |
702 | |
703 | if (update) { | |
704 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXREKEYOK); | |
705 | } else { | |
706 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW); | |
707 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); | |
708 | } | |
e8f69799 IL |
709 | conf = TLS_SW; |
710 | } | |
c46234eb | 711 | } else { |
4799ac81 BP |
712 | rc = tls_set_device_offload_rx(sk, ctx); |
713 | conf = TLS_HW; | |
b32fd3cc JK |
714 | if (!rc) { |
715 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE); | |
716 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); | |
717 | } else { | |
47069594 SD |
718 | rc = tls_set_sw_offload(sk, 0, |
719 | update ? crypto_info : NULL); | |
318892ac JK |
720 | if (rc) |
721 | goto err_crypto_info; | |
510128b3 SD |
722 | |
723 | if (update) { | |
724 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXREKEYOK); | |
725 | } else { | |
726 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW); | |
727 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); | |
728 | } | |
4799ac81 BP |
729 | conf = TLS_SW; |
730 | } | |
47069594 SD |
731 | if (!update) |
732 | tls_sw_strparser_arm(sk, ctx); | |
c46234eb DW |
733 | } |
734 | ||
f66de3ee BP |
735 | if (tx) |
736 | ctx->tx_conf = conf; | |
737 | else | |
738 | ctx->rx_conf = conf; | |
6d88207f | 739 | update_sk_prot(sk, ctx); |
06cc8786 SD |
740 | |
741 | if (update) | |
742 | return 0; | |
743 | ||
c46234eb DW |
744 | if (tx) { |
745 | ctx->sk_write_space = sk->sk_write_space; | |
746 | sk->sk_write_space = tls_write_space; | |
84c61fe1 JK |
747 | } else { |
748 | struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(ctx); | |
749 | ||
750 | tls_strp_check_rcv(&rx_ctx->strp); | |
c46234eb | 751 | } |
1ddcbfbf | 752 | return 0; |
3c4d7559 DW |
753 | |
754 | err_crypto_info: | |
510128b3 SD |
755 | if (update) { |
756 | TLS_INC_STATS(sock_net(sk), tx ? LINUX_MIB_TLSTXREKEYERROR | |
757 | : LINUX_MIB_TLSRXREKEYERROR); | |
758 | } | |
0d9e699d | 759 | memzero_explicit(crypto_ctx, sizeof(*crypto_ctx)); |
3c4d7559 DW |
760 | return rc; |
761 | } | |
762 | ||
c1318b39 BP |
763 | static int do_tls_setsockopt_tx_zc(struct sock *sk, sockptr_t optval, |
764 | unsigned int optlen) | |
765 | { | |
766 | struct tls_context *ctx = tls_get_ctx(sk); | |
767 | unsigned int value; | |
768 | ||
769 | if (sockptr_is_null(optval) || optlen != sizeof(value)) | |
770 | return -EINVAL; | |
771 | ||
772 | if (copy_from_sockptr(&value, optval, sizeof(value))) | |
773 | return -EFAULT; | |
774 | ||
775 | if (value > 1) | |
776 | return -EINVAL; | |
777 | ||
778 | ctx->zerocopy_sendfile = value; | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
88527790 JK |
783 | static int do_tls_setsockopt_no_pad(struct sock *sk, sockptr_t optval, |
784 | unsigned int optlen) | |
785 | { | |
786 | struct tls_context *ctx = tls_get_ctx(sk); | |
787 | u32 val; | |
788 | int rc; | |
789 | ||
790 | if (ctx->prot_info.version != TLS_1_3_VERSION || | |
791 | sockptr_is_null(optval) || optlen < sizeof(val)) | |
792 | return -EINVAL; | |
793 | ||
794 | rc = copy_from_sockptr(&val, optval, sizeof(val)); | |
795 | if (rc) | |
796 | return -EFAULT; | |
797 | if (val > 1) | |
798 | return -EINVAL; | |
799 | rc = check_zeroed_sockptr(optval, sizeof(val), optlen - sizeof(val)); | |
800 | if (rc < 1) | |
801 | return rc == 0 ? -EINVAL : rc; | |
802 | ||
803 | lock_sock(sk); | |
804 | rc = -EINVAL; | |
805 | if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) { | |
806 | ctx->rx_no_pad = val; | |
807 | tls_update_rx_zc_capable(ctx); | |
808 | rc = 0; | |
809 | } | |
810 | release_sock(sk); | |
811 | ||
812 | return rc; | |
813 | } | |
814 | ||
a7b75c5a CH |
815 | static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval, |
816 | unsigned int optlen) | |
3c4d7559 DW |
817 | { |
818 | int rc = 0; | |
819 | ||
820 | switch (optname) { | |
821 | case TLS_TX: | |
c46234eb | 822 | case TLS_RX: |
3c4d7559 | 823 | lock_sock(sk); |
c46234eb DW |
824 | rc = do_tls_setsockopt_conf(sk, optval, optlen, |
825 | optname == TLS_TX); | |
3c4d7559 DW |
826 | release_sock(sk); |
827 | break; | |
b489a6e5 | 828 | case TLS_TX_ZEROCOPY_RO: |
c1318b39 BP |
829 | lock_sock(sk); |
830 | rc = do_tls_setsockopt_tx_zc(sk, optval, optlen); | |
831 | release_sock(sk); | |
832 | break; | |
88527790 JK |
833 | case TLS_RX_EXPECT_NO_PAD: |
834 | rc = do_tls_setsockopt_no_pad(sk, optval, optlen); | |
835 | break; | |
3c4d7559 DW |
836 | default: |
837 | rc = -ENOPROTOOPT; | |
838 | break; | |
839 | } | |
840 | return rc; | |
841 | } | |
842 | ||
843 | static int tls_setsockopt(struct sock *sk, int level, int optname, | |
a7b75c5a | 844 | sockptr_t optval, unsigned int optlen) |
3c4d7559 DW |
845 | { |
846 | struct tls_context *ctx = tls_get_ctx(sk); | |
847 | ||
848 | if (level != SOL_TLS) | |
be7bbea1 JK |
849 | return ctx->sk_proto->setsockopt(sk, level, optname, optval, |
850 | optlen); | |
3c4d7559 DW |
851 | |
852 | return do_tls_setsockopt(sk, optname, optval, optlen); | |
853 | } | |
854 | ||
5071a1e6 JK |
855 | static int tls_disconnect(struct sock *sk, int flags) |
856 | { | |
857 | return -EOPNOTSUPP; | |
858 | } | |
859 | ||
08700dab | 860 | struct tls_context *tls_ctx_create(struct sock *sk) |
dd0bed16 AG |
861 | { |
862 | struct inet_connection_sock *icsk = inet_csk(sk); | |
863 | struct tls_context *ctx; | |
864 | ||
c6ec179a | 865 | ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); |
dd0bed16 AG |
866 | if (!ctx) |
867 | return NULL; | |
868 | ||
79ffe608 | 869 | mutex_init(&ctx->tx_lock); |
d5bee737 | 870 | ctx->sk_proto = READ_ONCE(sk->sk_prot); |
c55dcdd4 | 871 | ctx->sk = sk; |
91e61dd7 DJ |
872 | /* Release semantic of rcu_assign_pointer() ensures that |
873 | * ctx->sk_proto is visible before changing sk->sk_prot in | |
874 | * update_sk_prot(), and prevents reading uninitialized value in | |
875 | * tls_{getsockopt, setsockopt}. Note that we do not need a | |
876 | * read barrier in tls_{getsockopt,setsockopt} as there is an | |
877 | * address dependency between sk->sk_proto->{getsockopt,setsockopt} | |
878 | * and ctx->sk_proto. | |
879 | */ | |
880 | rcu_assign_pointer(icsk->icsk_ulp_data, ctx); | |
dd0bed16 AG |
881 | return ctx; |
882 | } | |
883 | ||
f3911f73 JK |
884 | static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
885 | const struct proto_ops *base) | |
886 | { | |
887 | ops[TLS_BASE][TLS_BASE] = *base; | |
888 | ||
889 | ops[TLS_SW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; | |
df720d28 | 890 | ops[TLS_SW ][TLS_BASE].splice_eof = tls_sw_splice_eof; |
f3911f73 JK |
891 | |
892 | ops[TLS_BASE][TLS_SW ] = ops[TLS_BASE][TLS_BASE]; | |
893 | ops[TLS_BASE][TLS_SW ].splice_read = tls_sw_splice_read; | |
121dca78 | 894 | ops[TLS_BASE][TLS_SW ].poll = tls_sk_poll; |
662fbcec | 895 | ops[TLS_BASE][TLS_SW ].read_sock = tls_sw_read_sock; |
f3911f73 JK |
896 | |
897 | ops[TLS_SW ][TLS_SW ] = ops[TLS_SW ][TLS_BASE]; | |
898 | ops[TLS_SW ][TLS_SW ].splice_read = tls_sw_splice_read; | |
121dca78 | 899 | ops[TLS_SW ][TLS_SW ].poll = tls_sk_poll; |
662fbcec | 900 | ops[TLS_SW ][TLS_SW ].read_sock = tls_sw_read_sock; |
f3911f73 JK |
901 | |
902 | #ifdef CONFIG_TLS_DEVICE | |
903 | ops[TLS_HW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; | |
f3911f73 JK |
904 | |
905 | ops[TLS_HW ][TLS_SW ] = ops[TLS_BASE][TLS_SW ]; | |
f3911f73 JK |
906 | |
907 | ops[TLS_BASE][TLS_HW ] = ops[TLS_BASE][TLS_SW ]; | |
908 | ||
909 | ops[TLS_SW ][TLS_HW ] = ops[TLS_SW ][TLS_SW ]; | |
910 | ||
911 | ops[TLS_HW ][TLS_HW ] = ops[TLS_HW ][TLS_SW ]; | |
f3911f73 JK |
912 | #endif |
913 | #ifdef CONFIG_TLS_TOE | |
914 | ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base; | |
915 | #endif | |
916 | } | |
917 | ||
63a6b3fe AG |
918 | static void tls_build_proto(struct sock *sk) |
919 | { | |
920 | int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; | |
9a893949 | 921 | struct proto *prot = READ_ONCE(sk->sk_prot); |
63a6b3fe AG |
922 | |
923 | /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ | |
924 | if (ip_ver == TLSV6 && | |
5bb4c45d | 925 | unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) { |
63a6b3fe | 926 | mutex_lock(&tcpv6_prot_mutex); |
5bb4c45d JS |
927 | if (likely(prot != saved_tcpv6_prot)) { |
928 | build_protos(tls_prots[TLSV6], prot); | |
f3911f73 JK |
929 | build_proto_ops(tls_proto_ops[TLSV6], |
930 | sk->sk_socket->ops); | |
5bb4c45d | 931 | smp_store_release(&saved_tcpv6_prot, prot); |
63a6b3fe AG |
932 | } |
933 | mutex_unlock(&tcpv6_prot_mutex); | |
934 | } | |
935 | ||
936 | if (ip_ver == TLSV4 && | |
5bb4c45d | 937 | unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) { |
63a6b3fe | 938 | mutex_lock(&tcpv4_prot_mutex); |
5bb4c45d JS |
939 | if (likely(prot != saved_tcpv4_prot)) { |
940 | build_protos(tls_prots[TLSV4], prot); | |
f3911f73 JK |
941 | build_proto_ops(tls_proto_ops[TLSV4], |
942 | sk->sk_socket->ops); | |
5bb4c45d | 943 | smp_store_release(&saved_tcpv4_prot, prot); |
63a6b3fe AG |
944 | } |
945 | mutex_unlock(&tcpv4_prot_mutex); | |
946 | } | |
947 | } | |
948 | ||
f66de3ee | 949 | static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], |
f13fe3e6 | 950 | const struct proto *base) |
c113187d | 951 | { |
f66de3ee BP |
952 | prot[TLS_BASE][TLS_BASE] = *base; |
953 | prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; | |
954 | prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; | |
5071a1e6 | 955 | prot[TLS_BASE][TLS_BASE].disconnect = tls_disconnect; |
f66de3ee BP |
956 | prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; |
957 | ||
958 | prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; | |
959 | prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; | |
df720d28 | 960 | prot[TLS_SW][TLS_BASE].splice_eof = tls_sw_splice_eof; |
f66de3ee BP |
961 | |
962 | prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; | |
924ad65e | 963 | prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; |
7b50ecfc | 964 | prot[TLS_BASE][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; |
924ad65e | 965 | prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; |
f66de3ee BP |
966 | |
967 | prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; | |
924ad65e | 968 | prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; |
7b50ecfc | 969 | prot[TLS_SW][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; |
924ad65e | 970 | prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; |
f66de3ee | 971 | |
e8f69799 IL |
972 | #ifdef CONFIG_TLS_DEVICE |
973 | prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; | |
974 | prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; | |
d4c1e80b | 975 | prot[TLS_HW][TLS_BASE].splice_eof = tls_device_splice_eof; |
e8f69799 IL |
976 | |
977 | prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; | |
978 | prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; | |
d4c1e80b | 979 | prot[TLS_HW][TLS_SW].splice_eof = tls_device_splice_eof; |
4799ac81 BP |
980 | |
981 | prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; | |
982 | ||
983 | prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; | |
984 | ||
985 | prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; | |
e8f69799 | 986 | #endif |
53b4414a | 987 | #ifdef CONFIG_TLS_TOE |
f66de3ee | 988 | prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; |
0eb8745e JK |
989 | prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash; |
990 | prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash; | |
53b4414a | 991 | #endif |
c113187d BP |
992 | } |
993 | ||
3c4d7559 DW |
994 | static int tls_init(struct sock *sk) |
995 | { | |
3c4d7559 DW |
996 | struct tls_context *ctx; |
997 | int rc = 0; | |
998 | ||
16bed0e6 JK |
999 | tls_build_proto(sk); |
1000 | ||
53b4414a | 1001 | #ifdef CONFIG_TLS_TOE |
0eb8745e | 1002 | if (tls_toe_bypass(sk)) |
95fa1454 | 1003 | return 0; |
53b4414a | 1004 | #endif |
dd0bed16 | 1005 | |
d91c3e17 IL |
1006 | /* The TLS ulp is currently supported only for TCP sockets |
1007 | * in ESTABLISHED state. | |
1008 | * Supporting sockets in LISTEN state will require us | |
1009 | * to modify the accept implementation to clone rather then | |
1010 | * share the ulp context. | |
1011 | */ | |
1012 | if (sk->sk_state != TCP_ESTABLISHED) | |
4a5cdc60 | 1013 | return -ENOTCONN; |
d91c3e17 | 1014 | |
3c4d7559 | 1015 | /* allocate tls context */ |
95fa1454 | 1016 | write_lock_bh(&sk->sk_callback_lock); |
08700dab | 1017 | ctx = tls_ctx_create(sk); |
3c4d7559 DW |
1018 | if (!ctx) { |
1019 | rc = -ENOMEM; | |
1020 | goto out; | |
1021 | } | |
6d88207f | 1022 | |
f66de3ee BP |
1023 | ctx->tx_conf = TLS_BASE; |
1024 | ctx->rx_conf = TLS_BASE; | |
6d88207f | 1025 | update_sk_prot(sk, ctx); |
3c4d7559 | 1026 | out: |
95fa1454 | 1027 | write_unlock_bh(&sk->sk_callback_lock); |
3c4d7559 DW |
1028 | return rc; |
1029 | } | |
1030 | ||
33bfe20d JF |
1031 | static void tls_update(struct sock *sk, struct proto *p, |
1032 | void (*write_space)(struct sock *sk)) | |
95fa1454 JF |
1033 | { |
1034 | struct tls_context *ctx; | |
1035 | ||
e34a07c0 JK |
1036 | WARN_ON_ONCE(sk->sk_prot == p); |
1037 | ||
95fa1454 | 1038 | ctx = tls_get_ctx(sk); |
33bfe20d JF |
1039 | if (likely(ctx)) { |
1040 | ctx->sk_write_space = write_space; | |
95fa1454 | 1041 | ctx->sk_proto = p; |
33bfe20d | 1042 | } else { |
b8e202d1 JS |
1043 | /* Pairs with lockless read in sk_clone_lock(). */ |
1044 | WRITE_ONCE(sk->sk_prot, p); | |
33bfe20d JF |
1045 | sk->sk_write_space = write_space; |
1046 | } | |
95fa1454 JF |
1047 | } |
1048 | ||
58790314 JK |
1049 | static u16 tls_user_config(struct tls_context *ctx, bool tx) |
1050 | { | |
1051 | u16 config = tx ? ctx->tx_conf : ctx->rx_conf; | |
1052 | ||
1053 | switch (config) { | |
1054 | case TLS_BASE: | |
1055 | return TLS_CONF_BASE; | |
1056 | case TLS_SW: | |
1057 | return TLS_CONF_SW; | |
1058 | case TLS_HW: | |
1059 | return TLS_CONF_HW; | |
1060 | case TLS_HW_RECORD: | |
1061 | return TLS_CONF_HW_RECORD; | |
1062 | } | |
1063 | return 0; | |
1064 | } | |
1065 | ||
0d7336f8 | 1066 | static int tls_get_info(struct sock *sk, struct sk_buff *skb, bool net_admin) |
26811cc9 DC |
1067 | { |
1068 | u16 version, cipher_type; | |
1069 | struct tls_context *ctx; | |
1070 | struct nlattr *start; | |
1071 | int err; | |
1072 | ||
1073 | start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS); | |
1074 | if (!start) | |
1075 | return -EMSGSIZE; | |
1076 | ||
1077 | rcu_read_lock(); | |
1078 | ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data); | |
1079 | if (!ctx) { | |
1080 | err = 0; | |
1081 | goto nla_failure; | |
1082 | } | |
1083 | version = ctx->prot_info.version; | |
1084 | if (version) { | |
1085 | err = nla_put_u16(skb, TLS_INFO_VERSION, version); | |
1086 | if (err) | |
1087 | goto nla_failure; | |
1088 | } | |
1089 | cipher_type = ctx->prot_info.cipher_type; | |
1090 | if (cipher_type) { | |
1091 | err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type); | |
1092 | if (err) | |
1093 | goto nla_failure; | |
1094 | } | |
1095 | err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true)); | |
1096 | if (err) | |
1097 | goto nla_failure; | |
1098 | ||
1099 | err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false)); | |
1100 | if (err) | |
1101 | goto nla_failure; | |
1102 | ||
c1318b39 | 1103 | if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) { |
b489a6e5 | 1104 | err = nla_put_flag(skb, TLS_INFO_ZC_RO_TX); |
c1318b39 BP |
1105 | if (err) |
1106 | goto nla_failure; | |
1107 | } | |
88527790 JK |
1108 | if (ctx->rx_no_pad) { |
1109 | err = nla_put_flag(skb, TLS_INFO_RX_NO_PAD); | |
1110 | if (err) | |
1111 | goto nla_failure; | |
1112 | } | |
c1318b39 | 1113 | |
26811cc9 DC |
1114 | rcu_read_unlock(); |
1115 | nla_nest_end(skb, start); | |
1116 | return 0; | |
1117 | ||
1118 | nla_failure: | |
1119 | rcu_read_unlock(); | |
1120 | nla_nest_cancel(skb, start); | |
1121 | return err; | |
1122 | } | |
1123 | ||
0d7336f8 | 1124 | static size_t tls_get_info_size(const struct sock *sk, bool net_admin) |
26811cc9 DC |
1125 | { |
1126 | size_t size = 0; | |
1127 | ||
1128 | size += nla_total_size(0) + /* INET_ULP_INFO_TLS */ | |
1129 | nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */ | |
1130 | nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */ | |
1131 | nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */ | |
1132 | nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */ | |
b489a6e5 | 1133 | nla_total_size(0) + /* TLS_INFO_ZC_RO_TX */ |
88527790 | 1134 | nla_total_size(0) + /* TLS_INFO_RX_NO_PAD */ |
26811cc9 DC |
1135 | 0; |
1136 | ||
1137 | return size; | |
1138 | } | |
1139 | ||
d26b698d JK |
1140 | static int __net_init tls_init_net(struct net *net) |
1141 | { | |
1142 | int err; | |
1143 | ||
1144 | net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib); | |
1145 | if (!net->mib.tls_statistics) | |
1146 | return -ENOMEM; | |
1147 | ||
1148 | err = tls_proc_init(net); | |
1149 | if (err) | |
1150 | goto err_free_stats; | |
1151 | ||
1152 | return 0; | |
1153 | err_free_stats: | |
1154 | free_percpu(net->mib.tls_statistics); | |
1155 | return err; | |
1156 | } | |
1157 | ||
1158 | static void __net_exit tls_exit_net(struct net *net) | |
1159 | { | |
1160 | tls_proc_fini(net); | |
1161 | free_percpu(net->mib.tls_statistics); | |
1162 | } | |
1163 | ||
1164 | static struct pernet_operations tls_proc_ops = { | |
1165 | .init = tls_init_net, | |
1166 | .exit = tls_exit_net, | |
1167 | }; | |
1168 | ||
3c4d7559 DW |
1169 | static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { |
1170 | .name = "tls", | |
1171 | .owner = THIS_MODULE, | |
1172 | .init = tls_init, | |
95fa1454 | 1173 | .update = tls_update, |
26811cc9 DC |
1174 | .get_info = tls_get_info, |
1175 | .get_info_size = tls_get_info_size, | |
3c4d7559 DW |
1176 | }; |
1177 | ||
1178 | static int __init tls_register(void) | |
1179 | { | |
d26b698d JK |
1180 | int err; |
1181 | ||
1182 | err = register_pernet_subsys(&tls_proc_ops); | |
1183 | if (err) | |
1184 | return err; | |
1185 | ||
84c61fe1 JK |
1186 | err = tls_strp_dev_init(); |
1187 | if (err) | |
1188 | goto err_pernet; | |
1189 | ||
3d8c51b2 | 1190 | err = tls_device_init(); |
84c61fe1 JK |
1191 | if (err) |
1192 | goto err_strp; | |
3d8c51b2 | 1193 | |
3c4d7559 DW |
1194 | tcp_register_ulp(&tcp_tls_ulp_ops); |
1195 | ||
1196 | return 0; | |
84c61fe1 JK |
1197 | err_strp: |
1198 | tls_strp_dev_exit(); | |
1199 | err_pernet: | |
1200 | unregister_pernet_subsys(&tls_proc_ops); | |
1201 | return err; | |
3c4d7559 DW |
1202 | } |
1203 | ||
1204 | static void __exit tls_unregister(void) | |
1205 | { | |
1206 | tcp_unregister_ulp(&tcp_tls_ulp_ops); | |
84c61fe1 | 1207 | tls_strp_dev_exit(); |
e8f69799 | 1208 | tls_device_cleanup(); |
d26b698d | 1209 | unregister_pernet_subsys(&tls_proc_ops); |
3c4d7559 DW |
1210 | } |
1211 | ||
1212 | module_init(tls_register); | |
1213 | module_exit(tls_unregister); |