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 | * Copyright (c) 2016-2017, Lance Chao <lancerchao@fb.com>. All rights reserved. | |
5 | * Copyright (c) 2016, Fridolin Pokorny <fridolin.pokorny@gmail.com>. All rights reserved. | |
6 | * Copyright (c) 2016, Nikos Mavrogiannopoulos <nmav@gnutls.org>. All rights reserved. | |
d3b18ad3 | 7 | * Copyright (c) 2018, Covalent IO, Inc. http://covalent.io |
3c4d7559 DW |
8 | * |
9 | * This software is available to you under a choice of one of two | |
10 | * licenses. You may choose to be licensed under the terms of the GNU | |
11 | * General Public License (GPL) Version 2, available from the file | |
12 | * COPYING in the main directory of this source tree, or the | |
13 | * OpenIB.org BSD license below: | |
14 | * | |
15 | * Redistribution and use in source and binary forms, with or | |
16 | * without modification, are permitted provided that the following | |
17 | * conditions are met: | |
18 | * | |
19 | * - Redistributions of source code must retain the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer. | |
22 | * | |
23 | * - Redistributions in binary form must reproduce the above | |
24 | * copyright notice, this list of conditions and the following | |
25 | * disclaimer in the documentation and/or other materials | |
26 | * provided with the distribution. | |
27 | * | |
28 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
29 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
30 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
31 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
32 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
33 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
34 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
35 | * SOFTWARE. | |
36 | */ | |
37 | ||
c46234eb | 38 | #include <linux/sched/signal.h> |
3c4d7559 | 39 | #include <linux/module.h> |
974271e5 | 40 | #include <linux/splice.h> |
3c4d7559 DW |
41 | #include <crypto/aead.h> |
42 | ||
c46234eb | 43 | #include <net/strparser.h> |
3c4d7559 DW |
44 | #include <net/tls.h> |
45 | ||
0927f71d DRK |
46 | static int __skb_nsg(struct sk_buff *skb, int offset, int len, |
47 | unsigned int recursion_level) | |
48 | { | |
49 | int start = skb_headlen(skb); | |
50 | int i, chunk = start - offset; | |
51 | struct sk_buff *frag_iter; | |
52 | int elt = 0; | |
53 | ||
54 | if (unlikely(recursion_level >= 24)) | |
55 | return -EMSGSIZE; | |
56 | ||
57 | if (chunk > 0) { | |
58 | if (chunk > len) | |
59 | chunk = len; | |
60 | elt++; | |
61 | len -= chunk; | |
62 | if (len == 0) | |
63 | return elt; | |
64 | offset += chunk; | |
65 | } | |
66 | ||
67 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
68 | int end; | |
69 | ||
70 | WARN_ON(start > offset + len); | |
71 | ||
72 | end = start + skb_frag_size(&skb_shinfo(skb)->frags[i]); | |
73 | chunk = end - offset; | |
74 | if (chunk > 0) { | |
75 | if (chunk > len) | |
76 | chunk = len; | |
77 | elt++; | |
78 | len -= chunk; | |
79 | if (len == 0) | |
80 | return elt; | |
81 | offset += chunk; | |
82 | } | |
83 | start = end; | |
84 | } | |
85 | ||
86 | if (unlikely(skb_has_frag_list(skb))) { | |
87 | skb_walk_frags(skb, frag_iter) { | |
88 | int end, ret; | |
89 | ||
90 | WARN_ON(start > offset + len); | |
91 | ||
92 | end = start + frag_iter->len; | |
93 | chunk = end - offset; | |
94 | if (chunk > 0) { | |
95 | if (chunk > len) | |
96 | chunk = len; | |
97 | ret = __skb_nsg(frag_iter, offset - start, chunk, | |
98 | recursion_level + 1); | |
99 | if (unlikely(ret < 0)) | |
100 | return ret; | |
101 | elt += ret; | |
102 | len -= chunk; | |
103 | if (len == 0) | |
104 | return elt; | |
105 | offset += chunk; | |
106 | } | |
107 | start = end; | |
108 | } | |
109 | } | |
110 | BUG_ON(len); | |
111 | return elt; | |
112 | } | |
113 | ||
114 | /* Return the number of scatterlist elements required to completely map the | |
115 | * skb, or -EMSGSIZE if the recursion depth is exceeded. | |
116 | */ | |
117 | static int skb_nsg(struct sk_buff *skb, int offset, int len) | |
118 | { | |
119 | return __skb_nsg(skb, offset, len, 0); | |
120 | } | |
121 | ||
130b392c | 122 | static int padding_length(struct tls_sw_context_rx *ctx, |
b53f4976 | 123 | struct tls_prot_info *prot, struct sk_buff *skb) |
130b392c DW |
124 | { |
125 | struct strp_msg *rxm = strp_msg(skb); | |
126 | int sub = 0; | |
127 | ||
128 | /* Determine zero-padding length */ | |
b53f4976 | 129 | if (prot->version == TLS_1_3_VERSION) { |
130b392c DW |
130 | char content_type = 0; |
131 | int err; | |
132 | int back = 17; | |
133 | ||
134 | while (content_type == 0) { | |
b53f4976 | 135 | if (back > rxm->full_len - prot->prepend_size) |
130b392c DW |
136 | return -EBADMSG; |
137 | err = skb_copy_bits(skb, | |
138 | rxm->offset + rxm->full_len - back, | |
139 | &content_type, 1); | |
b53f4976 JK |
140 | if (err) |
141 | return err; | |
130b392c DW |
142 | if (content_type) |
143 | break; | |
144 | sub++; | |
145 | back++; | |
146 | } | |
147 | ctx->control = content_type; | |
148 | } | |
149 | return sub; | |
150 | } | |
151 | ||
94524d8f VG |
152 | static void tls_decrypt_done(struct crypto_async_request *req, int err) |
153 | { | |
154 | struct aead_request *aead_req = (struct aead_request *)req; | |
94524d8f | 155 | struct scatterlist *sgout = aead_req->dst; |
692d7b5d | 156 | struct scatterlist *sgin = aead_req->src; |
7a3dd8c8 JF |
157 | struct tls_sw_context_rx *ctx; |
158 | struct tls_context *tls_ctx; | |
4509de14 | 159 | struct tls_prot_info *prot; |
94524d8f | 160 | struct scatterlist *sg; |
7a3dd8c8 | 161 | struct sk_buff *skb; |
94524d8f | 162 | unsigned int pages; |
7a3dd8c8 JF |
163 | int pending; |
164 | ||
165 | skb = (struct sk_buff *)req->data; | |
166 | tls_ctx = tls_get_ctx(skb->sk); | |
167 | ctx = tls_sw_ctx_rx(tls_ctx); | |
4509de14 | 168 | prot = &tls_ctx->prot_info; |
94524d8f VG |
169 | |
170 | /* Propagate if there was an err */ | |
171 | if (err) { | |
5c5ec668 JK |
172 | if (err == -EBADMSG) |
173 | TLS_INC_STATS(sock_net(skb->sk), | |
174 | LINUX_MIB_TLSDECRYPTERROR); | |
94524d8f | 175 | ctx->async_wait.err = err; |
7a3dd8c8 | 176 | tls_err_abort(skb->sk, err); |
692d7b5d VG |
177 | } else { |
178 | struct strp_msg *rxm = strp_msg(skb); | |
b53f4976 JK |
179 | int pad; |
180 | ||
181 | pad = padding_length(ctx, prot, skb); | |
182 | if (pad < 0) { | |
183 | ctx->async_wait.err = pad; | |
184 | tls_err_abort(skb->sk, pad); | |
185 | } else { | |
186 | rxm->full_len -= pad; | |
187 | rxm->offset += prot->prepend_size; | |
188 | rxm->full_len -= prot->overhead_size; | |
189 | } | |
94524d8f VG |
190 | } |
191 | ||
7a3dd8c8 JF |
192 | /* After using skb->sk to propagate sk through crypto async callback |
193 | * we need to NULL it again. | |
194 | */ | |
195 | skb->sk = NULL; | |
196 | ||
94524d8f | 197 | |
692d7b5d VG |
198 | /* Free the destination pages if skb was not decrypted inplace */ |
199 | if (sgout != sgin) { | |
200 | /* Skip the first S/G entry as it points to AAD */ | |
201 | for_each_sg(sg_next(sgout), sg, UINT_MAX, pages) { | |
202 | if (!sg) | |
203 | break; | |
204 | put_page(sg_page(sg)); | |
205 | } | |
94524d8f VG |
206 | } |
207 | ||
208 | kfree(aead_req); | |
209 | ||
0cada332 | 210 | spin_lock_bh(&ctx->decrypt_compl_lock); |
692d7b5d VG |
211 | pending = atomic_dec_return(&ctx->decrypt_pending); |
212 | ||
0cada332 | 213 | if (!pending && ctx->async_notify) |
94524d8f | 214 | complete(&ctx->async_wait.completion); |
0cada332 | 215 | spin_unlock_bh(&ctx->decrypt_compl_lock); |
94524d8f VG |
216 | } |
217 | ||
c46234eb | 218 | static int tls_do_decryption(struct sock *sk, |
94524d8f | 219 | struct sk_buff *skb, |
c46234eb DW |
220 | struct scatterlist *sgin, |
221 | struct scatterlist *sgout, | |
222 | char *iv_recv, | |
223 | size_t data_len, | |
94524d8f VG |
224 | struct aead_request *aead_req, |
225 | bool async) | |
c46234eb DW |
226 | { |
227 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 228 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 229 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 230 | int ret; |
c46234eb | 231 | |
0b243d00 | 232 | aead_request_set_tfm(aead_req, ctx->aead_recv); |
4509de14 | 233 | aead_request_set_ad(aead_req, prot->aad_size); |
c46234eb | 234 | aead_request_set_crypt(aead_req, sgin, sgout, |
4509de14 | 235 | data_len + prot->tag_size, |
c46234eb | 236 | (u8 *)iv_recv); |
c46234eb | 237 | |
94524d8f | 238 | if (async) { |
7a3dd8c8 JF |
239 | /* Using skb->sk to push sk through to crypto async callback |
240 | * handler. This allows propagating errors up to the socket | |
241 | * if needed. It _must_ be cleared in the async handler | |
a88c26f6 | 242 | * before consume_skb is called. We _know_ skb->sk is NULL |
7a3dd8c8 JF |
243 | * because it is a clone from strparser. |
244 | */ | |
245 | skb->sk = sk; | |
94524d8f VG |
246 | aead_request_set_callback(aead_req, |
247 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
248 | tls_decrypt_done, skb); | |
249 | atomic_inc(&ctx->decrypt_pending); | |
250 | } else { | |
251 | aead_request_set_callback(aead_req, | |
252 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
253 | crypto_req_done, &ctx->async_wait); | |
254 | } | |
255 | ||
256 | ret = crypto_aead_decrypt(aead_req); | |
257 | if (ret == -EINPROGRESS) { | |
258 | if (async) | |
259 | return ret; | |
260 | ||
261 | ret = crypto_wait_req(ret, &ctx->async_wait); | |
262 | } | |
263 | ||
264 | if (async) | |
265 | atomic_dec(&ctx->decrypt_pending); | |
266 | ||
c46234eb DW |
267 | return ret; |
268 | } | |
269 | ||
d829e9c4 | 270 | static void tls_trim_both_msgs(struct sock *sk, int target_size) |
3c4d7559 DW |
271 | { |
272 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 273 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 274 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 275 | struct tls_rec *rec = ctx->open_rec; |
3c4d7559 | 276 | |
d829e9c4 | 277 | sk_msg_trim(sk, &rec->msg_plaintext, target_size); |
3c4d7559 | 278 | if (target_size > 0) |
4509de14 | 279 | target_size += prot->overhead_size; |
d829e9c4 | 280 | sk_msg_trim(sk, &rec->msg_encrypted, target_size); |
3c4d7559 DW |
281 | } |
282 | ||
d829e9c4 | 283 | static int tls_alloc_encrypted_msg(struct sock *sk, int len) |
3c4d7559 DW |
284 | { |
285 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 286 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 287 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 | 288 | struct sk_msg *msg_en = &rec->msg_encrypted; |
3c4d7559 | 289 | |
d829e9c4 | 290 | return sk_msg_alloc(sk, msg_en, len, 0); |
3c4d7559 DW |
291 | } |
292 | ||
d829e9c4 | 293 | static int tls_clone_plaintext_msg(struct sock *sk, int required) |
3c4d7559 DW |
294 | { |
295 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 296 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 297 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 298 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
299 | struct sk_msg *msg_pl = &rec->msg_plaintext; |
300 | struct sk_msg *msg_en = &rec->msg_encrypted; | |
4e6d4720 | 301 | int skip, len; |
3c4d7559 | 302 | |
d829e9c4 DB |
303 | /* We add page references worth len bytes from encrypted sg |
304 | * at the end of plaintext sg. It is guaranteed that msg_en | |
4e6d4720 VG |
305 | * has enough required room (ensured by caller). |
306 | */ | |
d829e9c4 | 307 | len = required - msg_pl->sg.size; |
52ea992c | 308 | |
d829e9c4 DB |
309 | /* Skip initial bytes in msg_en's data to be able to use |
310 | * same offset of both plain and encrypted data. | |
4e6d4720 | 311 | */ |
4509de14 | 312 | skip = prot->prepend_size + msg_pl->sg.size; |
4e6d4720 | 313 | |
d829e9c4 | 314 | return sk_msg_clone(sk, msg_pl, msg_en, skip, len); |
3c4d7559 DW |
315 | } |
316 | ||
d3b18ad3 | 317 | static struct tls_rec *tls_get_rec(struct sock *sk) |
3c4d7559 DW |
318 | { |
319 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 320 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 321 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
322 | struct sk_msg *msg_pl, *msg_en; |
323 | struct tls_rec *rec; | |
324 | int mem_size; | |
3c4d7559 | 325 | |
d3b18ad3 JF |
326 | mem_size = sizeof(struct tls_rec) + crypto_aead_reqsize(ctx->aead_send); |
327 | ||
328 | rec = kzalloc(mem_size, sk->sk_allocation); | |
a42055e8 | 329 | if (!rec) |
d3b18ad3 JF |
330 | return NULL; |
331 | ||
332 | msg_pl = &rec->msg_plaintext; | |
333 | msg_en = &rec->msg_encrypted; | |
334 | ||
335 | sk_msg_init(msg_pl); | |
336 | sk_msg_init(msg_en); | |
337 | ||
338 | sg_init_table(rec->sg_aead_in, 2); | |
4509de14 | 339 | sg_set_buf(&rec->sg_aead_in[0], rec->aad_space, prot->aad_size); |
d3b18ad3 JF |
340 | sg_unmark_end(&rec->sg_aead_in[1]); |
341 | ||
342 | sg_init_table(rec->sg_aead_out, 2); | |
4509de14 | 343 | sg_set_buf(&rec->sg_aead_out[0], rec->aad_space, prot->aad_size); |
d3b18ad3 JF |
344 | sg_unmark_end(&rec->sg_aead_out[1]); |
345 | ||
346 | return rec; | |
347 | } | |
a42055e8 | 348 | |
d3b18ad3 JF |
349 | static void tls_free_rec(struct sock *sk, struct tls_rec *rec) |
350 | { | |
d829e9c4 DB |
351 | sk_msg_free(sk, &rec->msg_encrypted); |
352 | sk_msg_free(sk, &rec->msg_plaintext); | |
c774973e | 353 | kfree(rec); |
a42055e8 VG |
354 | } |
355 | ||
d3b18ad3 JF |
356 | static void tls_free_open_rec(struct sock *sk) |
357 | { | |
358 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
359 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
360 | struct tls_rec *rec = ctx->open_rec; | |
361 | ||
362 | if (rec) { | |
363 | tls_free_rec(sk, rec); | |
364 | ctx->open_rec = NULL; | |
365 | } | |
366 | } | |
367 | ||
a42055e8 VG |
368 | int tls_tx_records(struct sock *sk, int flags) |
369 | { | |
370 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
371 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
372 | struct tls_rec *rec, *tmp; | |
d829e9c4 | 373 | struct sk_msg *msg_en; |
a42055e8 VG |
374 | int tx_flags, rc = 0; |
375 | ||
376 | if (tls_is_partially_sent_record(tls_ctx)) { | |
9932a29a | 377 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
378 | struct tls_rec, list); |
379 | ||
380 | if (flags == -1) | |
381 | tx_flags = rec->tx_flags; | |
382 | else | |
383 | tx_flags = flags; | |
384 | ||
385 | rc = tls_push_partial_record(sk, tls_ctx, tx_flags); | |
386 | if (rc) | |
387 | goto tx_err; | |
388 | ||
389 | /* Full record has been transmitted. | |
9932a29a | 390 | * Remove the head of tx_list |
a42055e8 | 391 | */ |
a42055e8 | 392 | list_del(&rec->list); |
d829e9c4 | 393 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
394 | kfree(rec); |
395 | } | |
396 | ||
9932a29a VG |
397 | /* Tx all ready records */ |
398 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { | |
399 | if (READ_ONCE(rec->tx_ready)) { | |
a42055e8 VG |
400 | if (flags == -1) |
401 | tx_flags = rec->tx_flags; | |
402 | else | |
403 | tx_flags = flags; | |
404 | ||
d829e9c4 | 405 | msg_en = &rec->msg_encrypted; |
a42055e8 | 406 | rc = tls_push_sg(sk, tls_ctx, |
d829e9c4 | 407 | &msg_en->sg.data[msg_en->sg.curr], |
a42055e8 VG |
408 | 0, tx_flags); |
409 | if (rc) | |
410 | goto tx_err; | |
411 | ||
a42055e8 | 412 | list_del(&rec->list); |
d829e9c4 | 413 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
414 | kfree(rec); |
415 | } else { | |
416 | break; | |
417 | } | |
418 | } | |
419 | ||
420 | tx_err: | |
421 | if (rc < 0 && rc != -EAGAIN) | |
422 | tls_err_abort(sk, EBADMSG); | |
423 | ||
424 | return rc; | |
425 | } | |
426 | ||
427 | static void tls_encrypt_done(struct crypto_async_request *req, int err) | |
428 | { | |
429 | struct aead_request *aead_req = (struct aead_request *)req; | |
430 | struct sock *sk = req->data; | |
431 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 432 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 433 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d829e9c4 DB |
434 | struct scatterlist *sge; |
435 | struct sk_msg *msg_en; | |
a42055e8 VG |
436 | struct tls_rec *rec; |
437 | bool ready = false; | |
438 | int pending; | |
439 | ||
440 | rec = container_of(aead_req, struct tls_rec, aead_req); | |
d829e9c4 | 441 | msg_en = &rec->msg_encrypted; |
a42055e8 | 442 | |
d829e9c4 | 443 | sge = sk_msg_elem(msg_en, msg_en->sg.curr); |
4509de14 VG |
444 | sge->offset -= prot->prepend_size; |
445 | sge->length += prot->prepend_size; | |
a42055e8 | 446 | |
80ece6a0 | 447 | /* Check if error is previously set on socket */ |
a42055e8 | 448 | if (err || sk->sk_err) { |
a42055e8 VG |
449 | rec = NULL; |
450 | ||
451 | /* If err is already set on socket, return the same code */ | |
452 | if (sk->sk_err) { | |
453 | ctx->async_wait.err = sk->sk_err; | |
454 | } else { | |
455 | ctx->async_wait.err = err; | |
456 | tls_err_abort(sk, err); | |
457 | } | |
458 | } | |
459 | ||
9932a29a VG |
460 | if (rec) { |
461 | struct tls_rec *first_rec; | |
462 | ||
463 | /* Mark the record as ready for transmission */ | |
464 | smp_store_mb(rec->tx_ready, true); | |
465 | ||
466 | /* If received record is at head of tx_list, schedule tx */ | |
467 | first_rec = list_first_entry(&ctx->tx_list, | |
468 | struct tls_rec, list); | |
469 | if (rec == first_rec) | |
470 | ready = true; | |
471 | } | |
a42055e8 | 472 | |
0cada332 | 473 | spin_lock_bh(&ctx->encrypt_compl_lock); |
a42055e8 VG |
474 | pending = atomic_dec_return(&ctx->encrypt_pending); |
475 | ||
0cada332 | 476 | if (!pending && ctx->async_notify) |
a42055e8 | 477 | complete(&ctx->async_wait.completion); |
0cada332 | 478 | spin_unlock_bh(&ctx->encrypt_compl_lock); |
a42055e8 VG |
479 | |
480 | if (!ready) | |
481 | return; | |
482 | ||
483 | /* Schedule the transmission */ | |
484 | if (!test_and_set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
d829e9c4 | 485 | schedule_delayed_work(&ctx->tx_work.work, 1); |
3c4d7559 DW |
486 | } |
487 | ||
a42055e8 VG |
488 | static int tls_do_encryption(struct sock *sk, |
489 | struct tls_context *tls_ctx, | |
a447da7d DB |
490 | struct tls_sw_context_tx *ctx, |
491 | struct aead_request *aead_req, | |
d829e9c4 | 492 | size_t data_len, u32 start) |
3c4d7559 | 493 | { |
4509de14 | 494 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 495 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
496 | struct sk_msg *msg_en = &rec->msg_encrypted; |
497 | struct scatterlist *sge = sk_msg_elem(msg_en, start); | |
f295b3ae VG |
498 | int rc, iv_offset = 0; |
499 | ||
500 | /* For CCM based ciphers, first byte of IV is a constant */ | |
501 | if (prot->cipher_type == TLS_CIPHER_AES_CCM_128) { | |
502 | rec->iv_data[0] = TLS_AES_CCM_IV_B0_BYTE; | |
503 | iv_offset = 1; | |
504 | } | |
505 | ||
506 | memcpy(&rec->iv_data[iv_offset], tls_ctx->tx.iv, | |
507 | prot->iv_size + prot->salt_size); | |
3c4d7559 | 508 | |
6942a284 | 509 | xor_iv_with_seq(prot, rec->iv_data, tls_ctx->tx.rec_seq); |
32eb67b9 | 510 | |
4509de14 VG |
511 | sge->offset += prot->prepend_size; |
512 | sge->length -= prot->prepend_size; | |
3c4d7559 | 513 | |
d829e9c4 | 514 | msg_en->sg.curr = start; |
4e6d4720 | 515 | |
3c4d7559 | 516 | aead_request_set_tfm(aead_req, ctx->aead_send); |
4509de14 | 517 | aead_request_set_ad(aead_req, prot->aad_size); |
d829e9c4 DB |
518 | aead_request_set_crypt(aead_req, rec->sg_aead_in, |
519 | rec->sg_aead_out, | |
32eb67b9 | 520 | data_len, rec->iv_data); |
a54667f6 VG |
521 | |
522 | aead_request_set_callback(aead_req, CRYPTO_TFM_REQ_MAY_BACKLOG, | |
a42055e8 VG |
523 | tls_encrypt_done, sk); |
524 | ||
9932a29a VG |
525 | /* Add the record in tx_list */ |
526 | list_add_tail((struct list_head *)&rec->list, &ctx->tx_list); | |
a42055e8 | 527 | atomic_inc(&ctx->encrypt_pending); |
a54667f6 | 528 | |
a42055e8 VG |
529 | rc = crypto_aead_encrypt(aead_req); |
530 | if (!rc || rc != -EINPROGRESS) { | |
531 | atomic_dec(&ctx->encrypt_pending); | |
4509de14 VG |
532 | sge->offset -= prot->prepend_size; |
533 | sge->length += prot->prepend_size; | |
a42055e8 | 534 | } |
3c4d7559 | 535 | |
9932a29a VG |
536 | if (!rc) { |
537 | WRITE_ONCE(rec->tx_ready, true); | |
538 | } else if (rc != -EINPROGRESS) { | |
539 | list_del(&rec->list); | |
a42055e8 | 540 | return rc; |
9932a29a | 541 | } |
3c4d7559 | 542 | |
a42055e8 VG |
543 | /* Unhook the record from context if encryption is not failure */ |
544 | ctx->open_rec = NULL; | |
fb0f886f | 545 | tls_advance_record_sn(sk, prot, &tls_ctx->tx); |
3c4d7559 DW |
546 | return rc; |
547 | } | |
548 | ||
d3b18ad3 JF |
549 | static int tls_split_open_record(struct sock *sk, struct tls_rec *from, |
550 | struct tls_rec **to, struct sk_msg *msg_opl, | |
551 | struct sk_msg *msg_oen, u32 split_point, | |
552 | u32 tx_overhead_size, u32 *orig_end) | |
553 | { | |
554 | u32 i, j, bytes = 0, apply = msg_opl->apply_bytes; | |
555 | struct scatterlist *sge, *osge, *nsge; | |
556 | u32 orig_size = msg_opl->sg.size; | |
557 | struct scatterlist tmp = { }; | |
558 | struct sk_msg *msg_npl; | |
559 | struct tls_rec *new; | |
560 | int ret; | |
561 | ||
562 | new = tls_get_rec(sk); | |
563 | if (!new) | |
564 | return -ENOMEM; | |
565 | ret = sk_msg_alloc(sk, &new->msg_encrypted, msg_opl->sg.size + | |
566 | tx_overhead_size, 0); | |
567 | if (ret < 0) { | |
568 | tls_free_rec(sk, new); | |
569 | return ret; | |
570 | } | |
571 | ||
572 | *orig_end = msg_opl->sg.end; | |
573 | i = msg_opl->sg.start; | |
574 | sge = sk_msg_elem(msg_opl, i); | |
575 | while (apply && sge->length) { | |
576 | if (sge->length > apply) { | |
577 | u32 len = sge->length - apply; | |
578 | ||
579 | get_page(sg_page(sge)); | |
580 | sg_set_page(&tmp, sg_page(sge), len, | |
581 | sge->offset + apply); | |
582 | sge->length = apply; | |
583 | bytes += apply; | |
584 | apply = 0; | |
585 | } else { | |
586 | apply -= sge->length; | |
587 | bytes += sge->length; | |
588 | } | |
589 | ||
590 | sk_msg_iter_var_next(i); | |
591 | if (i == msg_opl->sg.end) | |
592 | break; | |
593 | sge = sk_msg_elem(msg_opl, i); | |
594 | } | |
595 | ||
596 | msg_opl->sg.end = i; | |
597 | msg_opl->sg.curr = i; | |
598 | msg_opl->sg.copybreak = 0; | |
599 | msg_opl->apply_bytes = 0; | |
600 | msg_opl->sg.size = bytes; | |
601 | ||
602 | msg_npl = &new->msg_plaintext; | |
603 | msg_npl->apply_bytes = apply; | |
604 | msg_npl->sg.size = orig_size - bytes; | |
605 | ||
606 | j = msg_npl->sg.start; | |
607 | nsge = sk_msg_elem(msg_npl, j); | |
608 | if (tmp.length) { | |
609 | memcpy(nsge, &tmp, sizeof(*nsge)); | |
610 | sk_msg_iter_var_next(j); | |
611 | nsge = sk_msg_elem(msg_npl, j); | |
612 | } | |
613 | ||
614 | osge = sk_msg_elem(msg_opl, i); | |
615 | while (osge->length) { | |
616 | memcpy(nsge, osge, sizeof(*nsge)); | |
617 | sg_unmark_end(nsge); | |
618 | sk_msg_iter_var_next(i); | |
619 | sk_msg_iter_var_next(j); | |
620 | if (i == *orig_end) | |
621 | break; | |
622 | osge = sk_msg_elem(msg_opl, i); | |
623 | nsge = sk_msg_elem(msg_npl, j); | |
624 | } | |
625 | ||
626 | msg_npl->sg.end = j; | |
627 | msg_npl->sg.curr = j; | |
628 | msg_npl->sg.copybreak = 0; | |
629 | ||
630 | *to = new; | |
631 | return 0; | |
632 | } | |
633 | ||
634 | static void tls_merge_open_record(struct sock *sk, struct tls_rec *to, | |
635 | struct tls_rec *from, u32 orig_end) | |
636 | { | |
637 | struct sk_msg *msg_npl = &from->msg_plaintext; | |
638 | struct sk_msg *msg_opl = &to->msg_plaintext; | |
639 | struct scatterlist *osge, *nsge; | |
640 | u32 i, j; | |
641 | ||
642 | i = msg_opl->sg.end; | |
643 | sk_msg_iter_var_prev(i); | |
644 | j = msg_npl->sg.start; | |
645 | ||
646 | osge = sk_msg_elem(msg_opl, i); | |
647 | nsge = sk_msg_elem(msg_npl, j); | |
648 | ||
649 | if (sg_page(osge) == sg_page(nsge) && | |
650 | osge->offset + osge->length == nsge->offset) { | |
651 | osge->length += nsge->length; | |
652 | put_page(sg_page(nsge)); | |
653 | } | |
654 | ||
655 | msg_opl->sg.end = orig_end; | |
656 | msg_opl->sg.curr = orig_end; | |
657 | msg_opl->sg.copybreak = 0; | |
658 | msg_opl->apply_bytes = msg_opl->sg.size + msg_npl->sg.size; | |
659 | msg_opl->sg.size += msg_npl->sg.size; | |
660 | ||
661 | sk_msg_free(sk, &to->msg_encrypted); | |
662 | sk_msg_xfer_full(&to->msg_encrypted, &from->msg_encrypted); | |
663 | ||
664 | kfree(from); | |
665 | } | |
666 | ||
3c4d7559 DW |
667 | static int tls_push_record(struct sock *sk, int flags, |
668 | unsigned char record_type) | |
669 | { | |
670 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 671 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 672 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 | 673 | struct tls_rec *rec = ctx->open_rec, *tmp = NULL; |
3f649ab7 | 674 | u32 i, split_point, orig_end; |
d829e9c4 | 675 | struct sk_msg *msg_pl, *msg_en; |
a447da7d | 676 | struct aead_request *req; |
d3b18ad3 | 677 | bool split; |
3c4d7559 DW |
678 | int rc; |
679 | ||
a42055e8 VG |
680 | if (!rec) |
681 | return 0; | |
a447da7d | 682 | |
d829e9c4 DB |
683 | msg_pl = &rec->msg_plaintext; |
684 | msg_en = &rec->msg_encrypted; | |
685 | ||
d3b18ad3 JF |
686 | split_point = msg_pl->apply_bytes; |
687 | split = split_point && split_point < msg_pl->sg.size; | |
d468e477 JF |
688 | if (unlikely((!split && |
689 | msg_pl->sg.size + | |
690 | prot->overhead_size > msg_en->sg.size) || | |
691 | (split && | |
692 | split_point + | |
693 | prot->overhead_size > msg_en->sg.size))) { | |
694 | split = true; | |
695 | split_point = msg_en->sg.size; | |
696 | } | |
d3b18ad3 JF |
697 | if (split) { |
698 | rc = tls_split_open_record(sk, rec, &tmp, msg_pl, msg_en, | |
4509de14 | 699 | split_point, prot->overhead_size, |
d3b18ad3 JF |
700 | &orig_end); |
701 | if (rc < 0) | |
702 | return rc; | |
d468e477 JF |
703 | /* This can happen if above tls_split_open_record allocates |
704 | * a single large encryption buffer instead of two smaller | |
705 | * ones. In this case adjust pointers and continue without | |
706 | * split. | |
707 | */ | |
708 | if (!msg_pl->sg.size) { | |
709 | tls_merge_open_record(sk, rec, tmp, orig_end); | |
710 | msg_pl = &rec->msg_plaintext; | |
711 | msg_en = &rec->msg_encrypted; | |
712 | split = false; | |
713 | } | |
d3b18ad3 | 714 | sk_msg_trim(sk, msg_en, msg_pl->sg.size + |
4509de14 | 715 | prot->overhead_size); |
d3b18ad3 JF |
716 | } |
717 | ||
a42055e8 VG |
718 | rec->tx_flags = flags; |
719 | req = &rec->aead_req; | |
3c4d7559 | 720 | |
d829e9c4 DB |
721 | i = msg_pl->sg.end; |
722 | sk_msg_iter_var_prev(i); | |
130b392c DW |
723 | |
724 | rec->content_type = record_type; | |
4509de14 | 725 | if (prot->version == TLS_1_3_VERSION) { |
130b392c DW |
726 | /* Add content type to end of message. No padding added */ |
727 | sg_set_buf(&rec->sg_content_type, &rec->content_type, 1); | |
728 | sg_mark_end(&rec->sg_content_type); | |
729 | sg_chain(msg_pl->sg.data, msg_pl->sg.end + 1, | |
730 | &rec->sg_content_type); | |
731 | } else { | |
732 | sg_mark_end(sk_msg_elem(msg_pl, i)); | |
733 | } | |
a42055e8 | 734 | |
9aaaa568 JF |
735 | if (msg_pl->sg.end < msg_pl->sg.start) { |
736 | sg_chain(&msg_pl->sg.data[msg_pl->sg.start], | |
737 | MAX_SKB_FRAGS - msg_pl->sg.start + 1, | |
738 | msg_pl->sg.data); | |
739 | } | |
740 | ||
d829e9c4 | 741 | i = msg_pl->sg.start; |
9e5ffed3 | 742 | sg_chain(rec->sg_aead_in, 2, &msg_pl->sg.data[i]); |
d829e9c4 DB |
743 | |
744 | i = msg_en->sg.end; | |
745 | sk_msg_iter_var_prev(i); | |
746 | sg_mark_end(sk_msg_elem(msg_en, i)); | |
747 | ||
748 | i = msg_en->sg.start; | |
749 | sg_chain(rec->sg_aead_out, 2, &msg_en->sg.data[i]); | |
750 | ||
4509de14 | 751 | tls_make_aad(rec->aad_space, msg_pl->sg.size + prot->tail_size, |
6942a284 | 752 | tls_ctx->tx.rec_seq, record_type, prot); |
3c4d7559 DW |
753 | |
754 | tls_fill_prepend(tls_ctx, | |
d829e9c4 | 755 | page_address(sg_page(&msg_en->sg.data[i])) + |
130b392c | 756 | msg_en->sg.data[i].offset, |
4509de14 | 757 | msg_pl->sg.size + prot->tail_size, |
6942a284 | 758 | record_type); |
3c4d7559 | 759 | |
d829e9c4 | 760 | tls_ctx->pending_open_record_frags = false; |
3c4d7559 | 761 | |
130b392c | 762 | rc = tls_do_encryption(sk, tls_ctx, ctx, req, |
4509de14 | 763 | msg_pl->sg.size + prot->tail_size, i); |
a42055e8 | 764 | if (rc < 0) { |
d3b18ad3 | 765 | if (rc != -EINPROGRESS) { |
d829e9c4 | 766 | tls_err_abort(sk, EBADMSG); |
d3b18ad3 JF |
767 | if (split) { |
768 | tls_ctx->pending_open_record_frags = true; | |
769 | tls_merge_open_record(sk, rec, tmp, orig_end); | |
770 | } | |
771 | } | |
5b053e12 | 772 | ctx->async_capable = 1; |
a42055e8 | 773 | return rc; |
d3b18ad3 JF |
774 | } else if (split) { |
775 | msg_pl = &tmp->msg_plaintext; | |
776 | msg_en = &tmp->msg_encrypted; | |
4509de14 | 777 | sk_msg_trim(sk, msg_en, msg_pl->sg.size + prot->overhead_size); |
d3b18ad3 JF |
778 | tls_ctx->pending_open_record_frags = true; |
779 | ctx->open_rec = tmp; | |
a42055e8 | 780 | } |
3c4d7559 | 781 | |
9932a29a | 782 | return tls_tx_records(sk, flags); |
3c4d7559 DW |
783 | } |
784 | ||
d3b18ad3 JF |
785 | static int bpf_exec_tx_verdict(struct sk_msg *msg, struct sock *sk, |
786 | bool full_record, u8 record_type, | |
a7bff11f | 787 | ssize_t *copied, int flags) |
3c4d7559 DW |
788 | { |
789 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 790 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
791 | struct sk_msg msg_redir = { }; |
792 | struct sk_psock *psock; | |
793 | struct sock *sk_redir; | |
a42055e8 | 794 | struct tls_rec *rec; |
0608c69c | 795 | bool enospc, policy; |
d3b18ad3 | 796 | int err = 0, send; |
7246d8ed | 797 | u32 delta = 0; |
d3b18ad3 | 798 | |
0608c69c | 799 | policy = !(flags & MSG_SENDPAGE_NOPOLICY); |
d3b18ad3 | 800 | psock = sk_psock_get(sk); |
d10523d0 JK |
801 | if (!psock || !policy) { |
802 | err = tls_push_record(sk, flags, record_type); | |
635d9398 | 803 | if (err && sk->sk_err == EBADMSG) { |
d10523d0 JK |
804 | *copied -= sk_msg_free(sk, msg); |
805 | tls_free_open_rec(sk); | |
635d9398 | 806 | err = -sk->sk_err; |
d10523d0 | 807 | } |
095f5614 XY |
808 | if (psock) |
809 | sk_psock_put(sk, psock); | |
d10523d0 JK |
810 | return err; |
811 | } | |
d3b18ad3 JF |
812 | more_data: |
813 | enospc = sk_msg_full(msg); | |
7246d8ed JF |
814 | if (psock->eval == __SK_NONE) { |
815 | delta = msg->sg.size; | |
d3b18ad3 | 816 | psock->eval = sk_psock_msg_verdict(sk, psock, msg); |
7361d448 | 817 | delta -= msg->sg.size; |
7246d8ed | 818 | } |
d3b18ad3 JF |
819 | if (msg->cork_bytes && msg->cork_bytes > msg->sg.size && |
820 | !enospc && !full_record) { | |
821 | err = -ENOSPC; | |
822 | goto out_err; | |
823 | } | |
824 | msg->cork_bytes = 0; | |
825 | send = msg->sg.size; | |
826 | if (msg->apply_bytes && msg->apply_bytes < send) | |
827 | send = msg->apply_bytes; | |
828 | ||
829 | switch (psock->eval) { | |
830 | case __SK_PASS: | |
831 | err = tls_push_record(sk, flags, record_type); | |
635d9398 | 832 | if (err && sk->sk_err == EBADMSG) { |
d3b18ad3 JF |
833 | *copied -= sk_msg_free(sk, msg); |
834 | tls_free_open_rec(sk); | |
635d9398 | 835 | err = -sk->sk_err; |
d3b18ad3 JF |
836 | goto out_err; |
837 | } | |
838 | break; | |
839 | case __SK_REDIRECT: | |
840 | sk_redir = psock->sk_redir; | |
841 | memcpy(&msg_redir, msg, sizeof(*msg)); | |
842 | if (msg->apply_bytes < send) | |
843 | msg->apply_bytes = 0; | |
844 | else | |
845 | msg->apply_bytes -= send; | |
846 | sk_msg_return_zero(sk, msg, send); | |
847 | msg->sg.size -= send; | |
848 | release_sock(sk); | |
849 | err = tcp_bpf_sendmsg_redir(sk_redir, &msg_redir, send, flags); | |
850 | lock_sock(sk); | |
851 | if (err < 0) { | |
852 | *copied -= sk_msg_free_nocharge(sk, &msg_redir); | |
853 | msg->sg.size = 0; | |
854 | } | |
855 | if (msg->sg.size == 0) | |
856 | tls_free_open_rec(sk); | |
857 | break; | |
858 | case __SK_DROP: | |
859 | default: | |
860 | sk_msg_free_partial(sk, msg, send); | |
861 | if (msg->apply_bytes < send) | |
862 | msg->apply_bytes = 0; | |
863 | else | |
864 | msg->apply_bytes -= send; | |
865 | if (msg->sg.size == 0) | |
866 | tls_free_open_rec(sk); | |
7246d8ed | 867 | *copied -= (send + delta); |
d3b18ad3 JF |
868 | err = -EACCES; |
869 | } | |
a42055e8 | 870 | |
d3b18ad3 JF |
871 | if (likely(!err)) { |
872 | bool reset_eval = !ctx->open_rec; | |
a42055e8 | 873 | |
d3b18ad3 JF |
874 | rec = ctx->open_rec; |
875 | if (rec) { | |
876 | msg = &rec->msg_plaintext; | |
877 | if (!msg->apply_bytes) | |
878 | reset_eval = true; | |
879 | } | |
880 | if (reset_eval) { | |
881 | psock->eval = __SK_NONE; | |
882 | if (psock->sk_redir) { | |
883 | sock_put(psock->sk_redir); | |
884 | psock->sk_redir = NULL; | |
885 | } | |
886 | } | |
887 | if (rec) | |
888 | goto more_data; | |
889 | } | |
890 | out_err: | |
891 | sk_psock_put(sk, psock); | |
892 | return err; | |
893 | } | |
894 | ||
895 | static int tls_sw_push_pending_record(struct sock *sk, int flags) | |
896 | { | |
897 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
898 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
899 | struct tls_rec *rec = ctx->open_rec; | |
900 | struct sk_msg *msg_pl; | |
901 | size_t copied; | |
a42055e8 | 902 | |
a42055e8 | 903 | if (!rec) |
d3b18ad3 | 904 | return 0; |
a42055e8 | 905 | |
d829e9c4 | 906 | msg_pl = &rec->msg_plaintext; |
d3b18ad3 JF |
907 | copied = msg_pl->sg.size; |
908 | if (!copied) | |
909 | return 0; | |
a42055e8 | 910 | |
d3b18ad3 JF |
911 | return bpf_exec_tx_verdict(msg_pl, sk, true, TLS_RECORD_TYPE_DATA, |
912 | &copied, flags); | |
a42055e8 VG |
913 | } |
914 | ||
915 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) | |
916 | { | |
3c4d7559 | 917 | long timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
a42055e8 | 918 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
4509de14 | 919 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 920 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
5b053e12 | 921 | bool async_capable = ctx->async_capable; |
a42055e8 | 922 | unsigned char record_type = TLS_RECORD_TYPE_DATA; |
00e23707 | 923 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
3c4d7559 | 924 | bool eor = !(msg->msg_flags & MSG_MORE); |
a7bff11f VF |
925 | size_t try_to_copy; |
926 | ssize_t copied = 0; | |
d829e9c4 | 927 | struct sk_msg *msg_pl, *msg_en; |
a42055e8 VG |
928 | struct tls_rec *rec; |
929 | int required_size; | |
930 | int num_async = 0; | |
3c4d7559 | 931 | bool full_record; |
a42055e8 VG |
932 | int record_room; |
933 | int num_zc = 0; | |
3c4d7559 | 934 | int orig_size; |
4128c0cf | 935 | int ret = 0; |
0cada332 | 936 | int pending; |
3c4d7559 | 937 | |
1c3b63f1 RC |
938 | if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | |
939 | MSG_CMSG_COMPAT)) | |
4a5cdc60 | 940 | return -EOPNOTSUPP; |
3c4d7559 | 941 | |
79ffe608 | 942 | mutex_lock(&tls_ctx->tx_lock); |
3c4d7559 DW |
943 | lock_sock(sk); |
944 | ||
3c4d7559 DW |
945 | if (unlikely(msg->msg_controllen)) { |
946 | ret = tls_proccess_cmsg(sk, msg, &record_type); | |
a42055e8 VG |
947 | if (ret) { |
948 | if (ret == -EINPROGRESS) | |
949 | num_async++; | |
950 | else if (ret != -EAGAIN) | |
951 | goto send_end; | |
952 | } | |
3c4d7559 DW |
953 | } |
954 | ||
955 | while (msg_data_left(msg)) { | |
956 | if (sk->sk_err) { | |
30be8f8d | 957 | ret = -sk->sk_err; |
3c4d7559 DW |
958 | goto send_end; |
959 | } | |
960 | ||
d3b18ad3 JF |
961 | if (ctx->open_rec) |
962 | rec = ctx->open_rec; | |
963 | else | |
964 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
965 | if (!rec) { |
966 | ret = -ENOMEM; | |
967 | goto send_end; | |
968 | } | |
969 | ||
d829e9c4 DB |
970 | msg_pl = &rec->msg_plaintext; |
971 | msg_en = &rec->msg_encrypted; | |
972 | ||
973 | orig_size = msg_pl->sg.size; | |
3c4d7559 DW |
974 | full_record = false; |
975 | try_to_copy = msg_data_left(msg); | |
d829e9c4 | 976 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
3c4d7559 DW |
977 | if (try_to_copy >= record_room) { |
978 | try_to_copy = record_room; | |
979 | full_record = true; | |
980 | } | |
981 | ||
d829e9c4 | 982 | required_size = msg_pl->sg.size + try_to_copy + |
4509de14 | 983 | prot->overhead_size; |
3c4d7559 DW |
984 | |
985 | if (!sk_stream_memory_free(sk)) | |
986 | goto wait_for_sndbuf; | |
a42055e8 | 987 | |
3c4d7559 | 988 | alloc_encrypted: |
d829e9c4 | 989 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
990 | if (ret) { |
991 | if (ret != -ENOSPC) | |
992 | goto wait_for_memory; | |
993 | ||
994 | /* Adjust try_to_copy according to the amount that was | |
995 | * actually allocated. The difference is due | |
996 | * to max sg elements limit | |
997 | */ | |
d829e9c4 | 998 | try_to_copy -= required_size - msg_en->sg.size; |
3c4d7559 DW |
999 | full_record = true; |
1000 | } | |
a42055e8 VG |
1001 | |
1002 | if (!is_kvec && (full_record || eor) && !async_capable) { | |
d3b18ad3 JF |
1003 | u32 first = msg_pl->sg.end; |
1004 | ||
d829e9c4 DB |
1005 | ret = sk_msg_zerocopy_from_iter(sk, &msg->msg_iter, |
1006 | msg_pl, try_to_copy); | |
3c4d7559 DW |
1007 | if (ret) |
1008 | goto fallback_to_reg_send; | |
1009 | ||
a42055e8 | 1010 | num_zc++; |
3c4d7559 | 1011 | copied += try_to_copy; |
d3b18ad3 JF |
1012 | |
1013 | sk_msg_sg_copy_set(msg_pl, first); | |
1014 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, | |
1015 | record_type, &copied, | |
1016 | msg->msg_flags); | |
a42055e8 VG |
1017 | if (ret) { |
1018 | if (ret == -EINPROGRESS) | |
1019 | num_async++; | |
d3b18ad3 JF |
1020 | else if (ret == -ENOMEM) |
1021 | goto wait_for_memory; | |
c329ef96 | 1022 | else if (ctx->open_rec && ret == -ENOSPC) |
d3b18ad3 | 1023 | goto rollback_iter; |
a42055e8 VG |
1024 | else if (ret != -EAGAIN) |
1025 | goto send_end; | |
1026 | } | |
5a3611ef | 1027 | continue; |
d3b18ad3 JF |
1028 | rollback_iter: |
1029 | copied -= try_to_copy; | |
1030 | sk_msg_sg_copy_clear(msg_pl, first); | |
1031 | iov_iter_revert(&msg->msg_iter, | |
1032 | msg_pl->sg.size - orig_size); | |
3c4d7559 | 1033 | fallback_to_reg_send: |
d829e9c4 | 1034 | sk_msg_trim(sk, msg_pl, orig_size); |
3c4d7559 DW |
1035 | } |
1036 | ||
d829e9c4 | 1037 | required_size = msg_pl->sg.size + try_to_copy; |
4e6d4720 | 1038 | |
d829e9c4 | 1039 | ret = tls_clone_plaintext_msg(sk, required_size); |
3c4d7559 DW |
1040 | if (ret) { |
1041 | if (ret != -ENOSPC) | |
4e6d4720 | 1042 | goto send_end; |
3c4d7559 DW |
1043 | |
1044 | /* Adjust try_to_copy according to the amount that was | |
1045 | * actually allocated. The difference is due | |
1046 | * to max sg elements limit | |
1047 | */ | |
d829e9c4 | 1048 | try_to_copy -= required_size - msg_pl->sg.size; |
3c4d7559 | 1049 | full_record = true; |
4509de14 VG |
1050 | sk_msg_trim(sk, msg_en, |
1051 | msg_pl->sg.size + prot->overhead_size); | |
3c4d7559 DW |
1052 | } |
1053 | ||
65a10e28 VG |
1054 | if (try_to_copy) { |
1055 | ret = sk_msg_memcopy_from_iter(sk, &msg->msg_iter, | |
1056 | msg_pl, try_to_copy); | |
1057 | if (ret < 0) | |
1058 | goto trim_sgl; | |
1059 | } | |
3c4d7559 | 1060 | |
d829e9c4 DB |
1061 | /* Open records defined only if successfully copied, otherwise |
1062 | * we would trim the sg but not reset the open record frags. | |
1063 | */ | |
1064 | tls_ctx->pending_open_record_frags = true; | |
3c4d7559 DW |
1065 | copied += try_to_copy; |
1066 | if (full_record || eor) { | |
d3b18ad3 JF |
1067 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
1068 | record_type, &copied, | |
1069 | msg->msg_flags); | |
3c4d7559 | 1070 | if (ret) { |
a42055e8 VG |
1071 | if (ret == -EINPROGRESS) |
1072 | num_async++; | |
d3b18ad3 JF |
1073 | else if (ret == -ENOMEM) |
1074 | goto wait_for_memory; | |
1075 | else if (ret != -EAGAIN) { | |
1076 | if (ret == -ENOSPC) | |
1077 | ret = 0; | |
a42055e8 | 1078 | goto send_end; |
d3b18ad3 | 1079 | } |
3c4d7559 DW |
1080 | } |
1081 | } | |
1082 | ||
1083 | continue; | |
1084 | ||
1085 | wait_for_sndbuf: | |
1086 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
1087 | wait_for_memory: | |
1088 | ret = sk_stream_wait_memory(sk, &timeo); | |
1089 | if (ret) { | |
1090 | trim_sgl: | |
c329ef96 JK |
1091 | if (ctx->open_rec) |
1092 | tls_trim_both_msgs(sk, orig_size); | |
3c4d7559 DW |
1093 | goto send_end; |
1094 | } | |
1095 | ||
c329ef96 | 1096 | if (ctx->open_rec && msg_en->sg.size < required_size) |
3c4d7559 | 1097 | goto alloc_encrypted; |
3c4d7559 DW |
1098 | } |
1099 | ||
a42055e8 VG |
1100 | if (!num_async) { |
1101 | goto send_end; | |
1102 | } else if (num_zc) { | |
1103 | /* Wait for pending encryptions to get completed */ | |
0cada332 VKY |
1104 | spin_lock_bh(&ctx->encrypt_compl_lock); |
1105 | ctx->async_notify = true; | |
a42055e8 | 1106 | |
0cada332 VKY |
1107 | pending = atomic_read(&ctx->encrypt_pending); |
1108 | spin_unlock_bh(&ctx->encrypt_compl_lock); | |
1109 | if (pending) | |
a42055e8 VG |
1110 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
1111 | else | |
1112 | reinit_completion(&ctx->async_wait.completion); | |
1113 | ||
0cada332 VKY |
1114 | /* There can be no concurrent accesses, since we have no |
1115 | * pending encrypt operations | |
1116 | */ | |
a42055e8 VG |
1117 | WRITE_ONCE(ctx->async_notify, false); |
1118 | ||
1119 | if (ctx->async_wait.err) { | |
1120 | ret = ctx->async_wait.err; | |
1121 | copied = 0; | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | /* Transmit if any encryptions have completed */ | |
1126 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1127 | cancel_delayed_work(&ctx->tx_work.work); | |
1128 | tls_tx_records(sk, msg->msg_flags); | |
1129 | } | |
1130 | ||
3c4d7559 DW |
1131 | send_end: |
1132 | ret = sk_stream_error(sk, msg->msg_flags, ret); | |
1133 | ||
1134 | release_sock(sk); | |
79ffe608 | 1135 | mutex_unlock(&tls_ctx->tx_lock); |
a7bff11f | 1136 | return copied > 0 ? copied : ret; |
3c4d7559 DW |
1137 | } |
1138 | ||
01cb8a1a Y |
1139 | static int tls_sw_do_sendpage(struct sock *sk, struct page *page, |
1140 | int offset, size_t size, int flags) | |
3c4d7559 | 1141 | { |
a42055e8 | 1142 | long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
3c4d7559 | 1143 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 1144 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
4509de14 | 1145 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
3c4d7559 | 1146 | unsigned char record_type = TLS_RECORD_TYPE_DATA; |
d829e9c4 | 1147 | struct sk_msg *msg_pl; |
a42055e8 VG |
1148 | struct tls_rec *rec; |
1149 | int num_async = 0; | |
a7bff11f | 1150 | ssize_t copied = 0; |
3c4d7559 DW |
1151 | bool full_record; |
1152 | int record_room; | |
4128c0cf | 1153 | int ret = 0; |
a42055e8 | 1154 | bool eor; |
3c4d7559 | 1155 | |
3c4d7559 | 1156 | eor = !(flags & (MSG_MORE | MSG_SENDPAGE_NOTLAST)); |
3c4d7559 DW |
1157 | sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1158 | ||
3c4d7559 DW |
1159 | /* Call the sk_stream functions to manage the sndbuf mem. */ |
1160 | while (size > 0) { | |
1161 | size_t copy, required_size; | |
1162 | ||
1163 | if (sk->sk_err) { | |
30be8f8d | 1164 | ret = -sk->sk_err; |
3c4d7559 DW |
1165 | goto sendpage_end; |
1166 | } | |
1167 | ||
d3b18ad3 JF |
1168 | if (ctx->open_rec) |
1169 | rec = ctx->open_rec; | |
1170 | else | |
1171 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
1172 | if (!rec) { |
1173 | ret = -ENOMEM; | |
1174 | goto sendpage_end; | |
1175 | } | |
1176 | ||
d829e9c4 DB |
1177 | msg_pl = &rec->msg_plaintext; |
1178 | ||
3c4d7559 | 1179 | full_record = false; |
d829e9c4 | 1180 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
3c4d7559 DW |
1181 | copy = size; |
1182 | if (copy >= record_room) { | |
1183 | copy = record_room; | |
1184 | full_record = true; | |
1185 | } | |
d829e9c4 | 1186 | |
4509de14 | 1187 | required_size = msg_pl->sg.size + copy + prot->overhead_size; |
3c4d7559 DW |
1188 | |
1189 | if (!sk_stream_memory_free(sk)) | |
1190 | goto wait_for_sndbuf; | |
1191 | alloc_payload: | |
d829e9c4 | 1192 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
1193 | if (ret) { |
1194 | if (ret != -ENOSPC) | |
1195 | goto wait_for_memory; | |
1196 | ||
1197 | /* Adjust copy according to the amount that was | |
1198 | * actually allocated. The difference is due | |
1199 | * to max sg elements limit | |
1200 | */ | |
d829e9c4 | 1201 | copy -= required_size - msg_pl->sg.size; |
3c4d7559 DW |
1202 | full_record = true; |
1203 | } | |
1204 | ||
d829e9c4 | 1205 | sk_msg_page_add(msg_pl, page, copy, offset); |
3c4d7559 | 1206 | sk_mem_charge(sk, copy); |
d829e9c4 | 1207 | |
3c4d7559 DW |
1208 | offset += copy; |
1209 | size -= copy; | |
d3b18ad3 | 1210 | copied += copy; |
3c4d7559 | 1211 | |
d829e9c4 DB |
1212 | tls_ctx->pending_open_record_frags = true; |
1213 | if (full_record || eor || sk_msg_full(msg_pl)) { | |
d3b18ad3 JF |
1214 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
1215 | record_type, &copied, flags); | |
3c4d7559 | 1216 | if (ret) { |
a42055e8 VG |
1217 | if (ret == -EINPROGRESS) |
1218 | num_async++; | |
d3b18ad3 JF |
1219 | else if (ret == -ENOMEM) |
1220 | goto wait_for_memory; | |
1221 | else if (ret != -EAGAIN) { | |
1222 | if (ret == -ENOSPC) | |
1223 | ret = 0; | |
a42055e8 | 1224 | goto sendpage_end; |
d3b18ad3 | 1225 | } |
3c4d7559 DW |
1226 | } |
1227 | } | |
1228 | continue; | |
1229 | wait_for_sndbuf: | |
1230 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
1231 | wait_for_memory: | |
1232 | ret = sk_stream_wait_memory(sk, &timeo); | |
1233 | if (ret) { | |
c329ef96 JK |
1234 | if (ctx->open_rec) |
1235 | tls_trim_both_msgs(sk, msg_pl->sg.size); | |
3c4d7559 DW |
1236 | goto sendpage_end; |
1237 | } | |
1238 | ||
c329ef96 JK |
1239 | if (ctx->open_rec) |
1240 | goto alloc_payload; | |
3c4d7559 DW |
1241 | } |
1242 | ||
a42055e8 VG |
1243 | if (num_async) { |
1244 | /* Transmit if any encryptions have completed */ | |
1245 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1246 | cancel_delayed_work(&ctx->tx_work.work); | |
1247 | tls_tx_records(sk, flags); | |
1248 | } | |
1249 | } | |
3c4d7559 | 1250 | sendpage_end: |
d3b18ad3 | 1251 | ret = sk_stream_error(sk, flags, ret); |
a7bff11f | 1252 | return copied > 0 ? copied : ret; |
3c4d7559 DW |
1253 | } |
1254 | ||
d4ffb02d WB |
1255 | int tls_sw_sendpage_locked(struct sock *sk, struct page *page, |
1256 | int offset, size_t size, int flags) | |
1257 | { | |
1258 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1259 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY | | |
1260 | MSG_NO_SHARED_FRAGS)) | |
4a5cdc60 | 1261 | return -EOPNOTSUPP; |
d4ffb02d WB |
1262 | |
1263 | return tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1264 | } | |
1265 | ||
0608c69c JF |
1266 | int tls_sw_sendpage(struct sock *sk, struct page *page, |
1267 | int offset, size_t size, int flags) | |
1268 | { | |
79ffe608 | 1269 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
0608c69c JF |
1270 | int ret; |
1271 | ||
1272 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1273 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY)) | |
4a5cdc60 | 1274 | return -EOPNOTSUPP; |
0608c69c | 1275 | |
79ffe608 | 1276 | mutex_lock(&tls_ctx->tx_lock); |
0608c69c JF |
1277 | lock_sock(sk); |
1278 | ret = tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1279 | release_sock(sk); | |
79ffe608 | 1280 | mutex_unlock(&tls_ctx->tx_lock); |
0608c69c JF |
1281 | return ret; |
1282 | } | |
1283 | ||
d3b18ad3 | 1284 | static struct sk_buff *tls_wait_data(struct sock *sk, struct sk_psock *psock, |
974271e5 | 1285 | bool nonblock, long timeo, int *err) |
c46234eb DW |
1286 | { |
1287 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1288 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
1289 | struct sk_buff *skb; |
1290 | DEFINE_WAIT_FUNC(wait, woken_wake_function); | |
1291 | ||
d3b18ad3 | 1292 | while (!(skb = ctx->recv_pkt) && sk_psock_queue_empty(psock)) { |
c46234eb DW |
1293 | if (sk->sk_err) { |
1294 | *err = sock_error(sk); | |
1295 | return NULL; | |
1296 | } | |
1297 | ||
20ffc7ad VF |
1298 | if (!skb_queue_empty(&sk->sk_receive_queue)) { |
1299 | __strp_unpause(&ctx->strp); | |
1300 | if (ctx->recv_pkt) | |
1301 | return ctx->recv_pkt; | |
1302 | } | |
1303 | ||
fcf4793e DRK |
1304 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1305 | return NULL; | |
1306 | ||
c46234eb DW |
1307 | if (sock_flag(sk, SOCK_DONE)) |
1308 | return NULL; | |
1309 | ||
974271e5 | 1310 | if (nonblock || !timeo) { |
c46234eb DW |
1311 | *err = -EAGAIN; |
1312 | return NULL; | |
1313 | } | |
1314 | ||
1315 | add_wait_queue(sk_sleep(sk), &wait); | |
1316 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); | |
d3b18ad3 JF |
1317 | sk_wait_event(sk, &timeo, |
1318 | ctx->recv_pkt != skb || | |
1319 | !sk_psock_queue_empty(psock), | |
1320 | &wait); | |
c46234eb DW |
1321 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
1322 | remove_wait_queue(sk_sleep(sk), &wait); | |
1323 | ||
1324 | /* Handle signals */ | |
1325 | if (signal_pending(current)) { | |
1326 | *err = sock_intr_errno(timeo); | |
1327 | return NULL; | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | return skb; | |
1332 | } | |
1333 | ||
d829e9c4 DB |
1334 | static int tls_setup_from_iter(struct sock *sk, struct iov_iter *from, |
1335 | int length, int *pages_used, | |
1336 | unsigned int *size_used, | |
1337 | struct scatterlist *to, | |
1338 | int to_max_pages) | |
1339 | { | |
1340 | int rc = 0, i = 0, num_elem = *pages_used, maxpages; | |
1341 | struct page *pages[MAX_SKB_FRAGS]; | |
1342 | unsigned int size = *size_used; | |
1343 | ssize_t copied, use; | |
1344 | size_t offset; | |
1345 | ||
1346 | while (length > 0) { | |
1347 | i = 0; | |
1348 | maxpages = to_max_pages - num_elem; | |
1349 | if (maxpages == 0) { | |
1350 | rc = -EFAULT; | |
1351 | goto out; | |
1352 | } | |
1353 | copied = iov_iter_get_pages(from, pages, | |
1354 | length, | |
1355 | maxpages, &offset); | |
1356 | if (copied <= 0) { | |
1357 | rc = -EFAULT; | |
1358 | goto out; | |
1359 | } | |
1360 | ||
1361 | iov_iter_advance(from, copied); | |
1362 | ||
1363 | length -= copied; | |
1364 | size += copied; | |
1365 | while (copied) { | |
1366 | use = min_t(int, copied, PAGE_SIZE - offset); | |
1367 | ||
1368 | sg_set_page(&to[num_elem], | |
1369 | pages[i], use, offset); | |
1370 | sg_unmark_end(&to[num_elem]); | |
1371 | /* We do not uncharge memory from this API */ | |
1372 | ||
1373 | offset = 0; | |
1374 | copied -= use; | |
1375 | ||
1376 | i++; | |
1377 | num_elem++; | |
1378 | } | |
1379 | } | |
1380 | /* Mark the end in the last sg entry if newly added */ | |
1381 | if (num_elem > *pages_used) | |
1382 | sg_mark_end(&to[num_elem - 1]); | |
1383 | out: | |
1384 | if (rc) | |
1385 | iov_iter_revert(from, size - *size_used); | |
1386 | *size_used = size; | |
1387 | *pages_used = num_elem; | |
1388 | ||
1389 | return rc; | |
1390 | } | |
1391 | ||
0b243d00 VG |
1392 | /* This function decrypts the input skb into either out_iov or in out_sg |
1393 | * or in skb buffers itself. The input parameter 'zc' indicates if | |
1394 | * zero-copy mode needs to be tried or not. With zero-copy mode, either | |
1395 | * out_iov or out_sg must be non-NULL. In case both out_iov and out_sg are | |
1396 | * NULL, then the decryption happens inside skb buffers itself, i.e. | |
1397 | * zero-copy gets disabled and 'zc' is updated. | |
1398 | */ | |
1399 | ||
1400 | static int decrypt_internal(struct sock *sk, struct sk_buff *skb, | |
1401 | struct iov_iter *out_iov, | |
1402 | struct scatterlist *out_sg, | |
692d7b5d | 1403 | int *chunk, bool *zc, bool async) |
0b243d00 VG |
1404 | { |
1405 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1406 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
4509de14 | 1407 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
0b243d00 VG |
1408 | struct strp_msg *rxm = strp_msg(skb); |
1409 | int n_sgin, n_sgout, nsg, mem_size, aead_size, err, pages = 0; | |
1410 | struct aead_request *aead_req; | |
1411 | struct sk_buff *unused; | |
1412 | u8 *aad, *iv, *mem = NULL; | |
1413 | struct scatterlist *sgin = NULL; | |
1414 | struct scatterlist *sgout = NULL; | |
4509de14 VG |
1415 | const int data_len = rxm->full_len - prot->overhead_size + |
1416 | prot->tail_size; | |
f295b3ae | 1417 | int iv_offset = 0; |
0b243d00 VG |
1418 | |
1419 | if (*zc && (out_iov || out_sg)) { | |
1420 | if (out_iov) | |
1421 | n_sgout = iov_iter_npages(out_iov, INT_MAX) + 1; | |
1422 | else | |
1423 | n_sgout = sg_nents(out_sg); | |
4509de14 VG |
1424 | n_sgin = skb_nsg(skb, rxm->offset + prot->prepend_size, |
1425 | rxm->full_len - prot->prepend_size); | |
0b243d00 VG |
1426 | } else { |
1427 | n_sgout = 0; | |
1428 | *zc = false; | |
0927f71d | 1429 | n_sgin = skb_cow_data(skb, 0, &unused); |
0b243d00 VG |
1430 | } |
1431 | ||
0b243d00 VG |
1432 | if (n_sgin < 1) |
1433 | return -EBADMSG; | |
1434 | ||
1435 | /* Increment to accommodate AAD */ | |
1436 | n_sgin = n_sgin + 1; | |
1437 | ||
1438 | nsg = n_sgin + n_sgout; | |
1439 | ||
1440 | aead_size = sizeof(*aead_req) + crypto_aead_reqsize(ctx->aead_recv); | |
1441 | mem_size = aead_size + (nsg * sizeof(struct scatterlist)); | |
4509de14 | 1442 | mem_size = mem_size + prot->aad_size; |
0b243d00 VG |
1443 | mem_size = mem_size + crypto_aead_ivsize(ctx->aead_recv); |
1444 | ||
1445 | /* Allocate a single block of memory which contains | |
1446 | * aead_req || sgin[] || sgout[] || aad || iv. | |
1447 | * This order achieves correct alignment for aead_req, sgin, sgout. | |
1448 | */ | |
1449 | mem = kmalloc(mem_size, sk->sk_allocation); | |
1450 | if (!mem) | |
1451 | return -ENOMEM; | |
1452 | ||
1453 | /* Segment the allocated memory */ | |
1454 | aead_req = (struct aead_request *)mem; | |
1455 | sgin = (struct scatterlist *)(mem + aead_size); | |
1456 | sgout = sgin + n_sgin; | |
1457 | aad = (u8 *)(sgout + n_sgout); | |
4509de14 | 1458 | iv = aad + prot->aad_size; |
0b243d00 | 1459 | |
f295b3ae VG |
1460 | /* For CCM based ciphers, first byte of nonce+iv is always '2' */ |
1461 | if (prot->cipher_type == TLS_CIPHER_AES_CCM_128) { | |
1462 | iv[0] = 2; | |
1463 | iv_offset = 1; | |
1464 | } | |
1465 | ||
0b243d00 VG |
1466 | /* Prepare IV */ |
1467 | err = skb_copy_bits(skb, rxm->offset + TLS_HEADER_SIZE, | |
f295b3ae | 1468 | iv + iv_offset + prot->salt_size, |
4509de14 | 1469 | prot->iv_size); |
0b243d00 VG |
1470 | if (err < 0) { |
1471 | kfree(mem); | |
1472 | return err; | |
1473 | } | |
a6acbe62 VF |
1474 | if (prot->version == TLS_1_3_VERSION || |
1475 | prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) | |
f295b3ae VG |
1476 | memcpy(iv + iv_offset, tls_ctx->rx.iv, |
1477 | crypto_aead_ivsize(ctx->aead_recv)); | |
130b392c | 1478 | else |
f295b3ae | 1479 | memcpy(iv + iv_offset, tls_ctx->rx.iv, prot->salt_size); |
130b392c | 1480 | |
6942a284 | 1481 | xor_iv_with_seq(prot, iv, tls_ctx->rx.rec_seq); |
0b243d00 VG |
1482 | |
1483 | /* Prepare AAD */ | |
4509de14 VG |
1484 | tls_make_aad(aad, rxm->full_len - prot->overhead_size + |
1485 | prot->tail_size, | |
6942a284 | 1486 | tls_ctx->rx.rec_seq, ctx->control, prot); |
0b243d00 VG |
1487 | |
1488 | /* Prepare sgin */ | |
1489 | sg_init_table(sgin, n_sgin); | |
4509de14 | 1490 | sg_set_buf(&sgin[0], aad, prot->aad_size); |
0b243d00 | 1491 | err = skb_to_sgvec(skb, &sgin[1], |
4509de14 VG |
1492 | rxm->offset + prot->prepend_size, |
1493 | rxm->full_len - prot->prepend_size); | |
0b243d00 VG |
1494 | if (err < 0) { |
1495 | kfree(mem); | |
1496 | return err; | |
1497 | } | |
1498 | ||
1499 | if (n_sgout) { | |
1500 | if (out_iov) { | |
1501 | sg_init_table(sgout, n_sgout); | |
4509de14 | 1502 | sg_set_buf(&sgout[0], aad, prot->aad_size); |
0b243d00 VG |
1503 | |
1504 | *chunk = 0; | |
d829e9c4 DB |
1505 | err = tls_setup_from_iter(sk, out_iov, data_len, |
1506 | &pages, chunk, &sgout[1], | |
1507 | (n_sgout - 1)); | |
0b243d00 VG |
1508 | if (err < 0) |
1509 | goto fallback_to_reg_recv; | |
1510 | } else if (out_sg) { | |
1511 | memcpy(sgout, out_sg, n_sgout * sizeof(*sgout)); | |
1512 | } else { | |
1513 | goto fallback_to_reg_recv; | |
1514 | } | |
1515 | } else { | |
1516 | fallback_to_reg_recv: | |
1517 | sgout = sgin; | |
1518 | pages = 0; | |
692d7b5d | 1519 | *chunk = data_len; |
0b243d00 VG |
1520 | *zc = false; |
1521 | } | |
1522 | ||
1523 | /* Prepare and submit AEAD request */ | |
94524d8f | 1524 | err = tls_do_decryption(sk, skb, sgin, sgout, iv, |
692d7b5d | 1525 | data_len, aead_req, async); |
94524d8f VG |
1526 | if (err == -EINPROGRESS) |
1527 | return err; | |
0b243d00 VG |
1528 | |
1529 | /* Release the pages in case iov was mapped to pages */ | |
1530 | for (; pages > 0; pages--) | |
1531 | put_page(sg_page(&sgout[pages])); | |
1532 | ||
1533 | kfree(mem); | |
1534 | return err; | |
1535 | } | |
1536 | ||
dafb67f3 | 1537 | static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb, |
692d7b5d VG |
1538 | struct iov_iter *dest, int *chunk, bool *zc, |
1539 | bool async) | |
dafb67f3 BP |
1540 | { |
1541 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1542 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
4509de14 | 1543 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
dafb67f3 | 1544 | struct strp_msg *rxm = strp_msg(skb); |
b53f4976 | 1545 | int pad, err = 0; |
dafb67f3 | 1546 | |
4799ac81 | 1547 | if (!ctx->decrypted) { |
b9d8fec9 | 1548 | if (tls_ctx->rx_conf == TLS_HW) { |
4de30a8d | 1549 | err = tls_device_decrypted(sk, tls_ctx, skb, rxm); |
b9d8fec9 JK |
1550 | if (err < 0) |
1551 | return err; | |
1552 | } | |
be2fbc15 | 1553 | |
d069b780 BP |
1554 | /* Still not decrypted after tls_device */ |
1555 | if (!ctx->decrypted) { | |
1556 | err = decrypt_internal(sk, skb, dest, NULL, chunk, zc, | |
1557 | async); | |
1558 | if (err < 0) { | |
1559 | if (err == -EINPROGRESS) | |
fb0f886f JK |
1560 | tls_advance_record_sn(sk, prot, |
1561 | &tls_ctx->rx); | |
5c5d22a7 JK |
1562 | else if (err == -EBADMSG) |
1563 | TLS_INC_STATS(sock_net(sk), | |
1564 | LINUX_MIB_TLSDECRYPTERROR); | |
d069b780 BP |
1565 | return err; |
1566 | } | |
c43ac97b JK |
1567 | } else { |
1568 | *zc = false; | |
94524d8f | 1569 | } |
130b392c | 1570 | |
b53f4976 JK |
1571 | pad = padding_length(ctx, prot, skb); |
1572 | if (pad < 0) | |
1573 | return pad; | |
1574 | ||
1575 | rxm->full_len -= pad; | |
4509de14 VG |
1576 | rxm->offset += prot->prepend_size; |
1577 | rxm->full_len -= prot->overhead_size; | |
fb0f886f | 1578 | tls_advance_record_sn(sk, prot, &tls_ctx->rx); |
bc76e5bb | 1579 | ctx->decrypted = 1; |
fedf201e | 1580 | ctx->saved_data_ready(sk); |
4799ac81 BP |
1581 | } else { |
1582 | *zc = false; | |
1583 | } | |
dafb67f3 | 1584 | |
dafb67f3 BP |
1585 | return err; |
1586 | } | |
1587 | ||
1588 | int decrypt_skb(struct sock *sk, struct sk_buff *skb, | |
1589 | struct scatterlist *sgout) | |
c46234eb | 1590 | { |
0b243d00 VG |
1591 | bool zc = true; |
1592 | int chunk; | |
c46234eb | 1593 | |
692d7b5d | 1594 | return decrypt_internal(sk, skb, NULL, sgout, &chunk, &zc, false); |
c46234eb DW |
1595 | } |
1596 | ||
1597 | static bool tls_sw_advance_skb(struct sock *sk, struct sk_buff *skb, | |
1598 | unsigned int len) | |
1599 | { | |
1600 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1601 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 1602 | |
94524d8f VG |
1603 | if (skb) { |
1604 | struct strp_msg *rxm = strp_msg(skb); | |
c46234eb | 1605 | |
94524d8f VG |
1606 | if (len < rxm->full_len) { |
1607 | rxm->offset += len; | |
1608 | rxm->full_len -= len; | |
1609 | return false; | |
1610 | } | |
a88c26f6 | 1611 | consume_skb(skb); |
c46234eb DW |
1612 | } |
1613 | ||
1614 | /* Finished with message */ | |
1615 | ctx->recv_pkt = NULL; | |
7170e604 | 1616 | __strp_unpause(&ctx->strp); |
c46234eb DW |
1617 | |
1618 | return true; | |
1619 | } | |
1620 | ||
692d7b5d | 1621 | /* This function traverses the rx_list in tls receive context to copies the |
2b794c40 | 1622 | * decrypted records into the buffer provided by caller zero copy is not |
692d7b5d VG |
1623 | * true. Further, the records are removed from the rx_list if it is not a peek |
1624 | * case and the record has been consumed completely. | |
1625 | */ | |
1626 | static int process_rx_list(struct tls_sw_context_rx *ctx, | |
1627 | struct msghdr *msg, | |
2b794c40 VG |
1628 | u8 *control, |
1629 | bool *cmsg, | |
692d7b5d VG |
1630 | size_t skip, |
1631 | size_t len, | |
1632 | bool zc, | |
1633 | bool is_peek) | |
1634 | { | |
1635 | struct sk_buff *skb = skb_peek(&ctx->rx_list); | |
2b794c40 VG |
1636 | u8 ctrl = *control; |
1637 | u8 msgc = *cmsg; | |
1638 | struct tls_msg *tlm; | |
692d7b5d VG |
1639 | ssize_t copied = 0; |
1640 | ||
2b794c40 VG |
1641 | /* Set the record type in 'control' if caller didn't pass it */ |
1642 | if (!ctrl && skb) { | |
1643 | tlm = tls_msg(skb); | |
1644 | ctrl = tlm->control; | |
1645 | } | |
1646 | ||
692d7b5d VG |
1647 | while (skip && skb) { |
1648 | struct strp_msg *rxm = strp_msg(skb); | |
2b794c40 VG |
1649 | tlm = tls_msg(skb); |
1650 | ||
1651 | /* Cannot process a record of different type */ | |
1652 | if (ctrl != tlm->control) | |
1653 | return 0; | |
692d7b5d VG |
1654 | |
1655 | if (skip < rxm->full_len) | |
1656 | break; | |
1657 | ||
1658 | skip = skip - rxm->full_len; | |
1659 | skb = skb_peek_next(skb, &ctx->rx_list); | |
1660 | } | |
1661 | ||
1662 | while (len && skb) { | |
1663 | struct sk_buff *next_skb; | |
1664 | struct strp_msg *rxm = strp_msg(skb); | |
1665 | int chunk = min_t(unsigned int, rxm->full_len - skip, len); | |
1666 | ||
2b794c40 VG |
1667 | tlm = tls_msg(skb); |
1668 | ||
1669 | /* Cannot process a record of different type */ | |
1670 | if (ctrl != tlm->control) | |
1671 | return 0; | |
1672 | ||
1673 | /* Set record type if not already done. For a non-data record, | |
1674 | * do not proceed if record type could not be copied. | |
1675 | */ | |
1676 | if (!msgc) { | |
1677 | int cerr = put_cmsg(msg, SOL_TLS, TLS_GET_RECORD_TYPE, | |
1678 | sizeof(ctrl), &ctrl); | |
1679 | msgc = true; | |
1680 | if (ctrl != TLS_RECORD_TYPE_DATA) { | |
1681 | if (cerr || msg->msg_flags & MSG_CTRUNC) | |
1682 | return -EIO; | |
1683 | ||
1684 | *cmsg = msgc; | |
1685 | } | |
1686 | } | |
1687 | ||
692d7b5d VG |
1688 | if (!zc || (rxm->full_len - skip) > len) { |
1689 | int err = skb_copy_datagram_msg(skb, rxm->offset + skip, | |
1690 | msg, chunk); | |
1691 | if (err < 0) | |
1692 | return err; | |
1693 | } | |
1694 | ||
1695 | len = len - chunk; | |
1696 | copied = copied + chunk; | |
1697 | ||
1698 | /* Consume the data from record if it is non-peek case*/ | |
1699 | if (!is_peek) { | |
1700 | rxm->offset = rxm->offset + chunk; | |
1701 | rxm->full_len = rxm->full_len - chunk; | |
1702 | ||
1703 | /* Return if there is unconsumed data in the record */ | |
1704 | if (rxm->full_len - skip) | |
1705 | break; | |
1706 | } | |
1707 | ||
1708 | /* The remaining skip-bytes must lie in 1st record in rx_list. | |
1709 | * So from the 2nd record, 'skip' should be 0. | |
1710 | */ | |
1711 | skip = 0; | |
1712 | ||
1713 | if (msg) | |
1714 | msg->msg_flags |= MSG_EOR; | |
1715 | ||
1716 | next_skb = skb_peek_next(skb, &ctx->rx_list); | |
1717 | ||
1718 | if (!is_peek) { | |
1719 | skb_unlink(skb, &ctx->rx_list); | |
a88c26f6 | 1720 | consume_skb(skb); |
692d7b5d VG |
1721 | } |
1722 | ||
1723 | skb = next_skb; | |
1724 | } | |
1725 | ||
2b794c40 | 1726 | *control = ctrl; |
692d7b5d VG |
1727 | return copied; |
1728 | } | |
1729 | ||
c46234eb DW |
1730 | int tls_sw_recvmsg(struct sock *sk, |
1731 | struct msghdr *msg, | |
1732 | size_t len, | |
1733 | int nonblock, | |
1734 | int flags, | |
1735 | int *addr_len) | |
1736 | { | |
1737 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1738 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
4509de14 | 1739 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
d3b18ad3 | 1740 | struct sk_psock *psock; |
692d7b5d VG |
1741 | unsigned char control = 0; |
1742 | ssize_t decrypted = 0; | |
c46234eb | 1743 | struct strp_msg *rxm; |
2b794c40 | 1744 | struct tls_msg *tlm; |
c46234eb DW |
1745 | struct sk_buff *skb; |
1746 | ssize_t copied = 0; | |
1747 | bool cmsg = false; | |
06030dba | 1748 | int target, err = 0; |
c46234eb | 1749 | long timeo; |
00e23707 | 1750 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
692d7b5d | 1751 | bool is_peek = flags & MSG_PEEK; |
e91de6af | 1752 | bool bpf_strp_enabled; |
94524d8f | 1753 | int num_async = 0; |
0cada332 | 1754 | int pending; |
c46234eb DW |
1755 | |
1756 | flags |= nonblock; | |
1757 | ||
1758 | if (unlikely(flags & MSG_ERRQUEUE)) | |
1759 | return sock_recv_errqueue(sk, msg, len, SOL_IP, IP_RECVERR); | |
1760 | ||
d3b18ad3 | 1761 | psock = sk_psock_get(sk); |
c46234eb | 1762 | lock_sock(sk); |
e91de6af | 1763 | bpf_strp_enabled = sk_psock_strp_enabled(psock); |
c46234eb | 1764 | |
692d7b5d | 1765 | /* Process pending decrypted records. It must be non-zero-copy */ |
2b794c40 VG |
1766 | err = process_rx_list(ctx, msg, &control, &cmsg, 0, len, false, |
1767 | is_peek); | |
692d7b5d VG |
1768 | if (err < 0) { |
1769 | tls_err_abort(sk, err); | |
1770 | goto end; | |
1771 | } else { | |
1772 | copied = err; | |
1773 | } | |
1774 | ||
46a16959 | 1775 | if (len <= copied) |
692d7b5d | 1776 | goto recv_end; |
46a16959 JK |
1777 | |
1778 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); | |
1779 | len = len - copied; | |
1780 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
692d7b5d | 1781 | |
04b25a54 | 1782 | while (len && (decrypted + copied < target || ctx->recv_pkt)) { |
692d7b5d | 1783 | bool retain_skb = false; |
692d7b5d VG |
1784 | bool zc = false; |
1785 | int to_decrypt; | |
c46234eb | 1786 | int chunk = 0; |
7754bd63 EBE |
1787 | bool async_capable; |
1788 | bool async = false; | |
c46234eb | 1789 | |
974271e5 | 1790 | skb = tls_wait_data(sk, psock, flags & MSG_DONTWAIT, timeo, &err); |
d3b18ad3 JF |
1791 | if (!skb) { |
1792 | if (psock) { | |
2bc793e3 CW |
1793 | int ret = sk_msg_recvmsg(sk, psock, msg, len, |
1794 | flags); | |
d3b18ad3 JF |
1795 | |
1796 | if (ret > 0) { | |
692d7b5d | 1797 | decrypted += ret; |
d3b18ad3 JF |
1798 | len -= ret; |
1799 | continue; | |
1800 | } | |
1801 | } | |
c46234eb | 1802 | goto recv_end; |
2b794c40 VG |
1803 | } else { |
1804 | tlm = tls_msg(skb); | |
1805 | if (prot->version == TLS_1_3_VERSION) | |
1806 | tlm->control = 0; | |
1807 | else | |
1808 | tlm->control = ctx->control; | |
d3b18ad3 | 1809 | } |
c46234eb DW |
1810 | |
1811 | rxm = strp_msg(skb); | |
94524d8f | 1812 | |
4509de14 | 1813 | to_decrypt = rxm->full_len - prot->overhead_size; |
fedf201e DW |
1814 | |
1815 | if (to_decrypt <= len && !is_kvec && !is_peek && | |
130b392c | 1816 | ctx->control == TLS_RECORD_TYPE_DATA && |
e91de6af JF |
1817 | prot->version != TLS_1_3_VERSION && |
1818 | !bpf_strp_enabled) | |
fedf201e DW |
1819 | zc = true; |
1820 | ||
c0ab4732 | 1821 | /* Do not use async mode if record is non-data */ |
e91de6af | 1822 | if (ctx->control == TLS_RECORD_TYPE_DATA && !bpf_strp_enabled) |
7754bd63 | 1823 | async_capable = ctx->async_capable; |
c0ab4732 | 1824 | else |
7754bd63 | 1825 | async_capable = false; |
c0ab4732 | 1826 | |
fedf201e | 1827 | err = decrypt_skb_update(sk, skb, &msg->msg_iter, |
7754bd63 | 1828 | &chunk, &zc, async_capable); |
fedf201e DW |
1829 | if (err < 0 && err != -EINPROGRESS) { |
1830 | tls_err_abort(sk, EBADMSG); | |
1831 | goto recv_end; | |
1832 | } | |
1833 | ||
7754bd63 EBE |
1834 | if (err == -EINPROGRESS) { |
1835 | async = true; | |
fedf201e | 1836 | num_async++; |
7754bd63 | 1837 | } else if (prot->version == TLS_1_3_VERSION) { |
2b794c40 | 1838 | tlm->control = ctx->control; |
7754bd63 | 1839 | } |
2b794c40 VG |
1840 | |
1841 | /* If the type of records being processed is not known yet, | |
1842 | * set it to record type just dequeued. If it is already known, | |
1843 | * but does not match the record type just dequeued, go to end. | |
1844 | * We always get record type here since for tls1.2, record type | |
1845 | * is known just after record is dequeued from stream parser. | |
1846 | * For tls1.3, we disable async. | |
1847 | */ | |
1848 | ||
1849 | if (!control) | |
1850 | control = tlm->control; | |
1851 | else if (control != tlm->control) | |
1852 | goto recv_end; | |
fedf201e | 1853 | |
c46234eb DW |
1854 | if (!cmsg) { |
1855 | int cerr; | |
1856 | ||
1857 | cerr = put_cmsg(msg, SOL_TLS, TLS_GET_RECORD_TYPE, | |
2b794c40 | 1858 | sizeof(control), &control); |
c46234eb | 1859 | cmsg = true; |
2b794c40 | 1860 | if (control != TLS_RECORD_TYPE_DATA) { |
c46234eb DW |
1861 | if (cerr || msg->msg_flags & MSG_CTRUNC) { |
1862 | err = -EIO; | |
1863 | goto recv_end; | |
1864 | } | |
1865 | } | |
c46234eb DW |
1866 | } |
1867 | ||
c0ab4732 VG |
1868 | if (async) |
1869 | goto pick_next_record; | |
1870 | ||
fedf201e | 1871 | if (!zc) { |
e91de6af JF |
1872 | if (bpf_strp_enabled) { |
1873 | err = sk_psock_tls_strp_read(psock, skb); | |
1874 | if (err != __SK_PASS) { | |
1875 | rxm->offset = rxm->offset + rxm->full_len; | |
1876 | rxm->full_len = 0; | |
1877 | if (err == __SK_DROP) | |
1878 | consume_skb(skb); | |
1879 | ctx->recv_pkt = NULL; | |
1880 | __strp_unpause(&ctx->strp); | |
1881 | continue; | |
1882 | } | |
1883 | } | |
1884 | ||
fedf201e DW |
1885 | if (rxm->full_len > len) { |
1886 | retain_skb = true; | |
1887 | chunk = len; | |
1888 | } else { | |
1889 | chunk = rxm->full_len; | |
1890 | } | |
692d7b5d | 1891 | |
fedf201e DW |
1892 | err = skb_copy_datagram_msg(skb, rxm->offset, |
1893 | msg, chunk); | |
1894 | if (err < 0) | |
1895 | goto recv_end; | |
94524d8f | 1896 | |
fedf201e DW |
1897 | if (!is_peek) { |
1898 | rxm->offset = rxm->offset + chunk; | |
1899 | rxm->full_len = rxm->full_len - chunk; | |
692d7b5d | 1900 | } |
c46234eb DW |
1901 | } |
1902 | ||
94524d8f | 1903 | pick_next_record: |
692d7b5d VG |
1904 | if (chunk > len) |
1905 | chunk = len; | |
1906 | ||
1907 | decrypted += chunk; | |
c46234eb | 1908 | len -= chunk; |
692d7b5d VG |
1909 | |
1910 | /* For async or peek case, queue the current skb */ | |
1911 | if (async || is_peek || retain_skb) { | |
1912 | skb_queue_tail(&ctx->rx_list, skb); | |
1913 | skb = NULL; | |
1914 | } | |
1915 | ||
1916 | if (tls_sw_advance_skb(sk, skb, chunk)) { | |
1917 | /* Return full control message to | |
1918 | * userspace before trying to parse | |
1919 | * another message type | |
50c6b58a | 1920 | */ |
692d7b5d | 1921 | msg->msg_flags |= MSG_EOR; |
3fe16edf | 1922 | if (control != TLS_RECORD_TYPE_DATA) |
692d7b5d VG |
1923 | goto recv_end; |
1924 | } else { | |
50c6b58a | 1925 | break; |
c46234eb | 1926 | } |
04b25a54 | 1927 | } |
c46234eb DW |
1928 | |
1929 | recv_end: | |
94524d8f VG |
1930 | if (num_async) { |
1931 | /* Wait for all previously submitted records to be decrypted */ | |
0cada332 VKY |
1932 | spin_lock_bh(&ctx->decrypt_compl_lock); |
1933 | ctx->async_notify = true; | |
1934 | pending = atomic_read(&ctx->decrypt_pending); | |
1935 | spin_unlock_bh(&ctx->decrypt_compl_lock); | |
1936 | if (pending) { | |
94524d8f VG |
1937 | err = crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
1938 | if (err) { | |
1939 | /* one of async decrypt failed */ | |
1940 | tls_err_abort(sk, err); | |
1941 | copied = 0; | |
692d7b5d VG |
1942 | decrypted = 0; |
1943 | goto end; | |
94524d8f VG |
1944 | } |
1945 | } else { | |
1946 | reinit_completion(&ctx->async_wait.completion); | |
1947 | } | |
0cada332 VKY |
1948 | |
1949 | /* There can be no concurrent accesses, since we have no | |
1950 | * pending decrypt operations | |
1951 | */ | |
94524d8f | 1952 | WRITE_ONCE(ctx->async_notify, false); |
692d7b5d VG |
1953 | |
1954 | /* Drain records from the rx_list & copy if required */ | |
1955 | if (is_peek || is_kvec) | |
2b794c40 | 1956 | err = process_rx_list(ctx, msg, &control, &cmsg, copied, |
692d7b5d VG |
1957 | decrypted, false, is_peek); |
1958 | else | |
2b794c40 | 1959 | err = process_rx_list(ctx, msg, &control, &cmsg, 0, |
692d7b5d VG |
1960 | decrypted, true, is_peek); |
1961 | if (err < 0) { | |
1962 | tls_err_abort(sk, err); | |
1963 | copied = 0; | |
1964 | goto end; | |
1965 | } | |
94524d8f VG |
1966 | } |
1967 | ||
692d7b5d VG |
1968 | copied += decrypted; |
1969 | ||
1970 | end: | |
c46234eb | 1971 | release_sock(sk); |
d3b18ad3 JF |
1972 | if (psock) |
1973 | sk_psock_put(sk, psock); | |
c46234eb DW |
1974 | return copied ? : err; |
1975 | } | |
1976 | ||
1977 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, | |
1978 | struct pipe_inode_info *pipe, | |
1979 | size_t len, unsigned int flags) | |
1980 | { | |
1981 | struct tls_context *tls_ctx = tls_get_ctx(sock->sk); | |
f66de3ee | 1982 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
1983 | struct strp_msg *rxm = NULL; |
1984 | struct sock *sk = sock->sk; | |
1985 | struct sk_buff *skb; | |
1986 | ssize_t copied = 0; | |
1987 | int err = 0; | |
1988 | long timeo; | |
1989 | int chunk; | |
0b243d00 | 1990 | bool zc = false; |
c46234eb DW |
1991 | |
1992 | lock_sock(sk); | |
1993 | ||
974271e5 | 1994 | timeo = sock_rcvtimeo(sk, flags & SPLICE_F_NONBLOCK); |
c46234eb | 1995 | |
974271e5 | 1996 | skb = tls_wait_data(sk, NULL, flags & SPLICE_F_NONBLOCK, timeo, &err); |
c46234eb DW |
1997 | if (!skb) |
1998 | goto splice_read_end; | |
1999 | ||
c46234eb | 2000 | if (!ctx->decrypted) { |
692d7b5d | 2001 | err = decrypt_skb_update(sk, skb, NULL, &chunk, &zc, false); |
c46234eb | 2002 | |
fedf201e DW |
2003 | /* splice does not support reading control messages */ |
2004 | if (ctx->control != TLS_RECORD_TYPE_DATA) { | |
4a5cdc60 | 2005 | err = -EINVAL; |
fedf201e DW |
2006 | goto splice_read_end; |
2007 | } | |
2008 | ||
c46234eb DW |
2009 | if (err < 0) { |
2010 | tls_err_abort(sk, EBADMSG); | |
2011 | goto splice_read_end; | |
2012 | } | |
bc76e5bb | 2013 | ctx->decrypted = 1; |
c46234eb DW |
2014 | } |
2015 | rxm = strp_msg(skb); | |
2016 | ||
2017 | chunk = min_t(unsigned int, rxm->full_len, len); | |
2018 | copied = skb_splice_bits(skb, sk, rxm->offset, pipe, chunk, flags); | |
2019 | if (copied < 0) | |
2020 | goto splice_read_end; | |
2021 | ||
2022 | if (likely(!(flags & MSG_PEEK))) | |
2023 | tls_sw_advance_skb(sk, skb, copied); | |
2024 | ||
2025 | splice_read_end: | |
2026 | release_sock(sk); | |
2027 | return copied ? : err; | |
2028 | } | |
2029 | ||
924ad65e | 2030 | bool tls_sw_stream_read(const struct sock *sk) |
c46234eb | 2031 | { |
c46234eb | 2032 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 2033 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 JF |
2034 | bool ingress_empty = true; |
2035 | struct sk_psock *psock; | |
c46234eb | 2036 | |
d3b18ad3 JF |
2037 | rcu_read_lock(); |
2038 | psock = sk_psock(sk); | |
2039 | if (psock) | |
2040 | ingress_empty = list_empty(&psock->ingress_msg); | |
2041 | rcu_read_unlock(); | |
c46234eb | 2042 | |
13aecb17 JK |
2043 | return !ingress_empty || ctx->recv_pkt || |
2044 | !skb_queue_empty(&ctx->rx_list); | |
c46234eb DW |
2045 | } |
2046 | ||
2047 | static int tls_read_size(struct strparser *strp, struct sk_buff *skb) | |
2048 | { | |
2049 | struct tls_context *tls_ctx = tls_get_ctx(strp->sk); | |
f66de3ee | 2050 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
4509de14 | 2051 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
3463e51d | 2052 | char header[TLS_HEADER_SIZE + MAX_IV_SIZE]; |
c46234eb DW |
2053 | struct strp_msg *rxm = strp_msg(skb); |
2054 | size_t cipher_overhead; | |
2055 | size_t data_len = 0; | |
2056 | int ret; | |
2057 | ||
2058 | /* Verify that we have a full TLS header, or wait for more data */ | |
4509de14 | 2059 | if (rxm->offset + prot->prepend_size > skb->len) |
c46234eb DW |
2060 | return 0; |
2061 | ||
3463e51d | 2062 | /* Sanity-check size of on-stack buffer. */ |
4509de14 | 2063 | if (WARN_ON(prot->prepend_size > sizeof(header))) { |
3463e51d KC |
2064 | ret = -EINVAL; |
2065 | goto read_failure; | |
2066 | } | |
2067 | ||
c46234eb | 2068 | /* Linearize header to local buffer */ |
4509de14 | 2069 | ret = skb_copy_bits(skb, rxm->offset, header, prot->prepend_size); |
c46234eb DW |
2070 | |
2071 | if (ret < 0) | |
2072 | goto read_failure; | |
2073 | ||
2074 | ctx->control = header[0]; | |
2075 | ||
2076 | data_len = ((header[4] & 0xFF) | (header[3] << 8)); | |
2077 | ||
4509de14 | 2078 | cipher_overhead = prot->tag_size; |
a6acbe62 VF |
2079 | if (prot->version != TLS_1_3_VERSION && |
2080 | prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) | |
4509de14 | 2081 | cipher_overhead += prot->iv_size; |
c46234eb | 2082 | |
130b392c | 2083 | if (data_len > TLS_MAX_PAYLOAD_SIZE + cipher_overhead + |
4509de14 | 2084 | prot->tail_size) { |
c46234eb DW |
2085 | ret = -EMSGSIZE; |
2086 | goto read_failure; | |
2087 | } | |
2088 | if (data_len < cipher_overhead) { | |
2089 | ret = -EBADMSG; | |
2090 | goto read_failure; | |
2091 | } | |
2092 | ||
130b392c DW |
2093 | /* Note that both TLS1.3 and TLS1.2 use TLS_1_2 version here */ |
2094 | if (header[1] != TLS_1_2_VERSION_MINOR || | |
2095 | header[2] != TLS_1_2_VERSION_MAJOR) { | |
c46234eb DW |
2096 | ret = -EINVAL; |
2097 | goto read_failure; | |
2098 | } | |
be2fbc15 | 2099 | |
f953d33b | 2100 | tls_device_rx_resync_new_rec(strp->sk, data_len + TLS_HEADER_SIZE, |
fe58a5a0 | 2101 | TCP_SKB_CB(skb)->seq + rxm->offset); |
c46234eb DW |
2102 | return data_len + TLS_HEADER_SIZE; |
2103 | ||
2104 | read_failure: | |
2105 | tls_err_abort(strp->sk, ret); | |
2106 | ||
2107 | return ret; | |
2108 | } | |
2109 | ||
2110 | static void tls_queue(struct strparser *strp, struct sk_buff *skb) | |
2111 | { | |
2112 | struct tls_context *tls_ctx = tls_get_ctx(strp->sk); | |
f66de3ee | 2113 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 2114 | |
bc76e5bb | 2115 | ctx->decrypted = 0; |
c46234eb DW |
2116 | |
2117 | ctx->recv_pkt = skb; | |
2118 | strp_pause(strp); | |
2119 | ||
ad13acce | 2120 | ctx->saved_data_ready(strp->sk); |
c46234eb DW |
2121 | } |
2122 | ||
2123 | static void tls_data_ready(struct sock *sk) | |
2124 | { | |
2125 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 2126 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 | 2127 | struct sk_psock *psock; |
c46234eb DW |
2128 | |
2129 | strp_data_ready(&ctx->strp); | |
d3b18ad3 JF |
2130 | |
2131 | psock = sk_psock_get(sk); | |
62b4011f XY |
2132 | if (psock) { |
2133 | if (!list_empty(&psock->ingress_msg)) | |
2134 | ctx->saved_data_ready(sk); | |
d3b18ad3 JF |
2135 | sk_psock_put(sk, psock); |
2136 | } | |
c46234eb DW |
2137 | } |
2138 | ||
f87e62d4 JF |
2139 | void tls_sw_cancel_work_tx(struct tls_context *tls_ctx) |
2140 | { | |
2141 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
2142 | ||
2143 | set_bit(BIT_TX_CLOSING, &ctx->tx_bitmask); | |
2144 | set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask); | |
2145 | cancel_delayed_work_sync(&ctx->tx_work.work); | |
2146 | } | |
2147 | ||
313ab004 | 2148 | void tls_sw_release_resources_tx(struct sock *sk) |
3c4d7559 DW |
2149 | { |
2150 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 2151 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 2152 | struct tls_rec *rec, *tmp; |
38f7e1c0 | 2153 | int pending; |
a42055e8 VG |
2154 | |
2155 | /* Wait for any pending async encryptions to complete */ | |
38f7e1c0 RM |
2156 | spin_lock_bh(&ctx->encrypt_compl_lock); |
2157 | ctx->async_notify = true; | |
2158 | pending = atomic_read(&ctx->encrypt_pending); | |
2159 | spin_unlock_bh(&ctx->encrypt_compl_lock); | |
2160 | ||
2161 | if (pending) | |
a42055e8 VG |
2162 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
2163 | ||
a42055e8 VG |
2164 | tls_tx_records(sk, -1); |
2165 | ||
9932a29a | 2166 | /* Free up un-sent records in tx_list. First, free |
a42055e8 VG |
2167 | * the partially sent record if any at head of tx_list. |
2168 | */ | |
c5daa6cc JK |
2169 | if (tls_ctx->partially_sent_record) { |
2170 | tls_free_partial_record(sk, tls_ctx); | |
9932a29a | 2171 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
2172 | struct tls_rec, list); |
2173 | list_del(&rec->list); | |
d829e9c4 | 2174 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
2175 | kfree(rec); |
2176 | } | |
2177 | ||
9932a29a | 2178 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { |
a42055e8 | 2179 | list_del(&rec->list); |
d829e9c4 DB |
2180 | sk_msg_free(sk, &rec->msg_encrypted); |
2181 | sk_msg_free(sk, &rec->msg_plaintext); | |
a42055e8 VG |
2182 | kfree(rec); |
2183 | } | |
3c4d7559 | 2184 | |
201876b3 | 2185 | crypto_free_aead(ctx->aead_send); |
c774973e | 2186 | tls_free_open_rec(sk); |
313ab004 JF |
2187 | } |
2188 | ||
2189 | void tls_sw_free_ctx_tx(struct tls_context *tls_ctx) | |
2190 | { | |
2191 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
f66de3ee BP |
2192 | |
2193 | kfree(ctx); | |
2194 | } | |
2195 | ||
39f56e1a | 2196 | void tls_sw_release_resources_rx(struct sock *sk) |
f66de3ee BP |
2197 | { |
2198 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
2199 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
2200 | ||
12c76861 JK |
2201 | kfree(tls_ctx->rx.rec_seq); |
2202 | kfree(tls_ctx->rx.iv); | |
2203 | ||
c46234eb | 2204 | if (ctx->aead_recv) { |
201876b3 VG |
2205 | kfree_skb(ctx->recv_pkt); |
2206 | ctx->recv_pkt = NULL; | |
692d7b5d | 2207 | skb_queue_purge(&ctx->rx_list); |
c46234eb DW |
2208 | crypto_free_aead(ctx->aead_recv); |
2209 | strp_stop(&ctx->strp); | |
313ab004 JF |
2210 | /* If tls_sw_strparser_arm() was not called (cleanup paths) |
2211 | * we still want to strp_stop(), but sk->sk_data_ready was | |
2212 | * never swapped. | |
2213 | */ | |
2214 | if (ctx->saved_data_ready) { | |
2215 | write_lock_bh(&sk->sk_callback_lock); | |
2216 | sk->sk_data_ready = ctx->saved_data_ready; | |
2217 | write_unlock_bh(&sk->sk_callback_lock); | |
2218 | } | |
c46234eb | 2219 | } |
39f56e1a BP |
2220 | } |
2221 | ||
313ab004 | 2222 | void tls_sw_strparser_done(struct tls_context *tls_ctx) |
39f56e1a | 2223 | { |
39f56e1a BP |
2224 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
2225 | ||
313ab004 JF |
2226 | strp_done(&ctx->strp); |
2227 | } | |
2228 | ||
2229 | void tls_sw_free_ctx_rx(struct tls_context *tls_ctx) | |
2230 | { | |
2231 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
3c4d7559 | 2232 | |
3c4d7559 DW |
2233 | kfree(ctx); |
2234 | } | |
2235 | ||
313ab004 JF |
2236 | void tls_sw_free_resources_rx(struct sock *sk) |
2237 | { | |
2238 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
2239 | ||
2240 | tls_sw_release_resources_rx(sk); | |
2241 | tls_sw_free_ctx_rx(tls_ctx); | |
2242 | } | |
2243 | ||
9932a29a | 2244 | /* The work handler to transmitt the encrypted records in tx_list */ |
a42055e8 VG |
2245 | static void tx_work_handler(struct work_struct *work) |
2246 | { | |
2247 | struct delayed_work *delayed_work = to_delayed_work(work); | |
2248 | struct tx_work *tx_work = container_of(delayed_work, | |
2249 | struct tx_work, work); | |
2250 | struct sock *sk = tx_work->sk; | |
2251 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f87e62d4 | 2252 | struct tls_sw_context_tx *ctx; |
a42055e8 | 2253 | |
f87e62d4 | 2254 | if (unlikely(!tls_ctx)) |
a42055e8 VG |
2255 | return; |
2256 | ||
f87e62d4 JF |
2257 | ctx = tls_sw_ctx_tx(tls_ctx); |
2258 | if (test_bit(BIT_TX_CLOSING, &ctx->tx_bitmask)) | |
2259 | return; | |
2260 | ||
2261 | if (!test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
2262 | return; | |
79ffe608 | 2263 | mutex_lock(&tls_ctx->tx_lock); |
a42055e8 VG |
2264 | lock_sock(sk); |
2265 | tls_tx_records(sk, -1); | |
2266 | release_sock(sk); | |
79ffe608 | 2267 | mutex_unlock(&tls_ctx->tx_lock); |
a42055e8 VG |
2268 | } |
2269 | ||
7463d3a2 BP |
2270 | void tls_sw_write_space(struct sock *sk, struct tls_context *ctx) |
2271 | { | |
2272 | struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx); | |
2273 | ||
2274 | /* Schedule the transmission if tx list is ready */ | |
02b1fa07 JK |
2275 | if (is_tx_ready(tx_ctx) && |
2276 | !test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask)) | |
2277 | schedule_delayed_work(&tx_ctx->tx_work.work, 0); | |
7463d3a2 BP |
2278 | } |
2279 | ||
318892ac JK |
2280 | void tls_sw_strparser_arm(struct sock *sk, struct tls_context *tls_ctx) |
2281 | { | |
2282 | struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(tls_ctx); | |
2283 | ||
2284 | write_lock_bh(&sk->sk_callback_lock); | |
2285 | rx_ctx->saved_data_ready = sk->sk_data_ready; | |
2286 | sk->sk_data_ready = tls_data_ready; | |
2287 | write_unlock_bh(&sk->sk_callback_lock); | |
2288 | ||
2289 | strp_check_rcv(&rx_ctx->strp); | |
2290 | } | |
2291 | ||
c46234eb | 2292 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx) |
3c4d7559 | 2293 | { |
4509de14 VG |
2294 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
2295 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
3c4d7559 DW |
2296 | struct tls_crypto_info *crypto_info; |
2297 | struct tls12_crypto_info_aes_gcm_128 *gcm_128_info; | |
fb99bce7 | 2298 | struct tls12_crypto_info_aes_gcm_256 *gcm_256_info; |
f295b3ae | 2299 | struct tls12_crypto_info_aes_ccm_128 *ccm_128_info; |
74ea6106 | 2300 | struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305_info; |
f66de3ee BP |
2301 | struct tls_sw_context_tx *sw_ctx_tx = NULL; |
2302 | struct tls_sw_context_rx *sw_ctx_rx = NULL; | |
c46234eb DW |
2303 | struct cipher_context *cctx; |
2304 | struct crypto_aead **aead; | |
2305 | struct strp_callbacks cb; | |
f295b3ae | 2306 | u16 nonce_size, tag_size, iv_size, rec_seq_size, salt_size; |
692d7b5d | 2307 | struct crypto_tfm *tfm; |
f295b3ae | 2308 | char *iv, *rec_seq, *key, *salt, *cipher_name; |
fb99bce7 | 2309 | size_t keysize; |
3c4d7559 DW |
2310 | int rc = 0; |
2311 | ||
2312 | if (!ctx) { | |
2313 | rc = -EINVAL; | |
2314 | goto out; | |
2315 | } | |
2316 | ||
f66de3ee | 2317 | if (tx) { |
b190a587 BP |
2318 | if (!ctx->priv_ctx_tx) { |
2319 | sw_ctx_tx = kzalloc(sizeof(*sw_ctx_tx), GFP_KERNEL); | |
2320 | if (!sw_ctx_tx) { | |
2321 | rc = -ENOMEM; | |
2322 | goto out; | |
2323 | } | |
2324 | ctx->priv_ctx_tx = sw_ctx_tx; | |
2325 | } else { | |
2326 | sw_ctx_tx = | |
2327 | (struct tls_sw_context_tx *)ctx->priv_ctx_tx; | |
c46234eb | 2328 | } |
c46234eb | 2329 | } else { |
b190a587 BP |
2330 | if (!ctx->priv_ctx_rx) { |
2331 | sw_ctx_rx = kzalloc(sizeof(*sw_ctx_rx), GFP_KERNEL); | |
2332 | if (!sw_ctx_rx) { | |
2333 | rc = -ENOMEM; | |
2334 | goto out; | |
2335 | } | |
2336 | ctx->priv_ctx_rx = sw_ctx_rx; | |
2337 | } else { | |
2338 | sw_ctx_rx = | |
2339 | (struct tls_sw_context_rx *)ctx->priv_ctx_rx; | |
f66de3ee | 2340 | } |
3c4d7559 DW |
2341 | } |
2342 | ||
c46234eb | 2343 | if (tx) { |
b190a587 | 2344 | crypto_init_wait(&sw_ctx_tx->async_wait); |
0cada332 | 2345 | spin_lock_init(&sw_ctx_tx->encrypt_compl_lock); |
86029d10 | 2346 | crypto_info = &ctx->crypto_send.info; |
c46234eb | 2347 | cctx = &ctx->tx; |
f66de3ee | 2348 | aead = &sw_ctx_tx->aead_send; |
9932a29a | 2349 | INIT_LIST_HEAD(&sw_ctx_tx->tx_list); |
a42055e8 VG |
2350 | INIT_DELAYED_WORK(&sw_ctx_tx->tx_work.work, tx_work_handler); |
2351 | sw_ctx_tx->tx_work.sk = sk; | |
c46234eb | 2352 | } else { |
b190a587 | 2353 | crypto_init_wait(&sw_ctx_rx->async_wait); |
0cada332 | 2354 | spin_lock_init(&sw_ctx_rx->decrypt_compl_lock); |
86029d10 | 2355 | crypto_info = &ctx->crypto_recv.info; |
c46234eb | 2356 | cctx = &ctx->rx; |
692d7b5d | 2357 | skb_queue_head_init(&sw_ctx_rx->rx_list); |
f66de3ee | 2358 | aead = &sw_ctx_rx->aead_recv; |
c46234eb DW |
2359 | } |
2360 | ||
3c4d7559 DW |
2361 | switch (crypto_info->cipher_type) { |
2362 | case TLS_CIPHER_AES_GCM_128: { | |
2363 | nonce_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
2364 | tag_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
2365 | iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
2366 | iv = ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->iv; | |
2367 | rec_seq_size = TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE; | |
2368 | rec_seq = | |
2369 | ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->rec_seq; | |
2370 | gcm_128_info = | |
2371 | (struct tls12_crypto_info_aes_gcm_128 *)crypto_info; | |
fb99bce7 DW |
2372 | keysize = TLS_CIPHER_AES_GCM_128_KEY_SIZE; |
2373 | key = gcm_128_info->key; | |
2374 | salt = gcm_128_info->salt; | |
f295b3ae VG |
2375 | salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE; |
2376 | cipher_name = "gcm(aes)"; | |
fb99bce7 DW |
2377 | break; |
2378 | } | |
2379 | case TLS_CIPHER_AES_GCM_256: { | |
2380 | nonce_size = TLS_CIPHER_AES_GCM_256_IV_SIZE; | |
2381 | tag_size = TLS_CIPHER_AES_GCM_256_TAG_SIZE; | |
2382 | iv_size = TLS_CIPHER_AES_GCM_256_IV_SIZE; | |
2383 | iv = ((struct tls12_crypto_info_aes_gcm_256 *)crypto_info)->iv; | |
2384 | rec_seq_size = TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE; | |
2385 | rec_seq = | |
2386 | ((struct tls12_crypto_info_aes_gcm_256 *)crypto_info)->rec_seq; | |
2387 | gcm_256_info = | |
2388 | (struct tls12_crypto_info_aes_gcm_256 *)crypto_info; | |
2389 | keysize = TLS_CIPHER_AES_GCM_256_KEY_SIZE; | |
2390 | key = gcm_256_info->key; | |
2391 | salt = gcm_256_info->salt; | |
f295b3ae VG |
2392 | salt_size = TLS_CIPHER_AES_GCM_256_SALT_SIZE; |
2393 | cipher_name = "gcm(aes)"; | |
2394 | break; | |
2395 | } | |
2396 | case TLS_CIPHER_AES_CCM_128: { | |
2397 | nonce_size = TLS_CIPHER_AES_CCM_128_IV_SIZE; | |
2398 | tag_size = TLS_CIPHER_AES_CCM_128_TAG_SIZE; | |
2399 | iv_size = TLS_CIPHER_AES_CCM_128_IV_SIZE; | |
2400 | iv = ((struct tls12_crypto_info_aes_ccm_128 *)crypto_info)->iv; | |
2401 | rec_seq_size = TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE; | |
2402 | rec_seq = | |
2403 | ((struct tls12_crypto_info_aes_ccm_128 *)crypto_info)->rec_seq; | |
2404 | ccm_128_info = | |
2405 | (struct tls12_crypto_info_aes_ccm_128 *)crypto_info; | |
2406 | keysize = TLS_CIPHER_AES_CCM_128_KEY_SIZE; | |
2407 | key = ccm_128_info->key; | |
2408 | salt = ccm_128_info->salt; | |
2409 | salt_size = TLS_CIPHER_AES_CCM_128_SALT_SIZE; | |
2410 | cipher_name = "ccm(aes)"; | |
3c4d7559 DW |
2411 | break; |
2412 | } | |
74ea6106 VF |
2413 | case TLS_CIPHER_CHACHA20_POLY1305: { |
2414 | chacha20_poly1305_info = (void *)crypto_info; | |
2415 | nonce_size = 0; | |
2416 | tag_size = TLS_CIPHER_CHACHA20_POLY1305_TAG_SIZE; | |
2417 | iv_size = TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE; | |
2418 | iv = chacha20_poly1305_info->iv; | |
2419 | rec_seq_size = TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE; | |
2420 | rec_seq = chacha20_poly1305_info->rec_seq; | |
2421 | keysize = TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE; | |
2422 | key = chacha20_poly1305_info->key; | |
2423 | salt = chacha20_poly1305_info->salt; | |
2424 | salt_size = TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE; | |
2425 | cipher_name = "rfc7539(chacha20,poly1305)"; | |
2426 | break; | |
2427 | } | |
3c4d7559 DW |
2428 | default: |
2429 | rc = -EINVAL; | |
cf6d43ef | 2430 | goto free_priv; |
3c4d7559 DW |
2431 | } |
2432 | ||
89fec474 JK |
2433 | /* Sanity-check the sizes for stack allocations. */ |
2434 | if (iv_size > MAX_IV_SIZE || nonce_size > MAX_IV_SIZE || | |
2435 | rec_seq_size > TLS_MAX_REC_SEQ_SIZE) { | |
b16520f7 KC |
2436 | rc = -EINVAL; |
2437 | goto free_priv; | |
2438 | } | |
2439 | ||
130b392c DW |
2440 | if (crypto_info->version == TLS_1_3_VERSION) { |
2441 | nonce_size = 0; | |
4509de14 VG |
2442 | prot->aad_size = TLS_HEADER_SIZE; |
2443 | prot->tail_size = 1; | |
130b392c | 2444 | } else { |
4509de14 VG |
2445 | prot->aad_size = TLS_AAD_SPACE_SIZE; |
2446 | prot->tail_size = 0; | |
130b392c DW |
2447 | } |
2448 | ||
4509de14 VG |
2449 | prot->version = crypto_info->version; |
2450 | prot->cipher_type = crypto_info->cipher_type; | |
2451 | prot->prepend_size = TLS_HEADER_SIZE + nonce_size; | |
2452 | prot->tag_size = tag_size; | |
2453 | prot->overhead_size = prot->prepend_size + | |
2454 | prot->tag_size + prot->tail_size; | |
2455 | prot->iv_size = iv_size; | |
f295b3ae VG |
2456 | prot->salt_size = salt_size; |
2457 | cctx->iv = kmalloc(iv_size + salt_size, GFP_KERNEL); | |
c46234eb | 2458 | if (!cctx->iv) { |
3c4d7559 | 2459 | rc = -ENOMEM; |
cf6d43ef | 2460 | goto free_priv; |
3c4d7559 | 2461 | } |
fb99bce7 | 2462 | /* Note: 128 & 256 bit salt are the same size */ |
4509de14 | 2463 | prot->rec_seq_size = rec_seq_size; |
f295b3ae VG |
2464 | memcpy(cctx->iv, salt, salt_size); |
2465 | memcpy(cctx->iv + salt_size, iv, iv_size); | |
969d5090 | 2466 | cctx->rec_seq = kmemdup(rec_seq, rec_seq_size, GFP_KERNEL); |
c46234eb | 2467 | if (!cctx->rec_seq) { |
3c4d7559 DW |
2468 | rc = -ENOMEM; |
2469 | goto free_iv; | |
2470 | } | |
c46234eb | 2471 | |
c46234eb | 2472 | if (!*aead) { |
f295b3ae | 2473 | *aead = crypto_alloc_aead(cipher_name, 0, 0); |
c46234eb DW |
2474 | if (IS_ERR(*aead)) { |
2475 | rc = PTR_ERR(*aead); | |
2476 | *aead = NULL; | |
3c4d7559 DW |
2477 | goto free_rec_seq; |
2478 | } | |
2479 | } | |
2480 | ||
2481 | ctx->push_pending_record = tls_sw_push_pending_record; | |
2482 | ||
fb99bce7 DW |
2483 | rc = crypto_aead_setkey(*aead, key, keysize); |
2484 | ||
3c4d7559 DW |
2485 | if (rc) |
2486 | goto free_aead; | |
2487 | ||
4509de14 | 2488 | rc = crypto_aead_setauthsize(*aead, prot->tag_size); |
c46234eb DW |
2489 | if (rc) |
2490 | goto free_aead; | |
2491 | ||
f66de3ee | 2492 | if (sw_ctx_rx) { |
692d7b5d | 2493 | tfm = crypto_aead_tfm(sw_ctx_rx->aead_recv); |
8497ded2 VG |
2494 | |
2495 | if (crypto_info->version == TLS_1_3_VERSION) | |
5c5458ec | 2496 | sw_ctx_rx->async_capable = 0; |
8497ded2 VG |
2497 | else |
2498 | sw_ctx_rx->async_capable = | |
5c5458ec JK |
2499 | !!(tfm->__crt_alg->cra_flags & |
2500 | CRYPTO_ALG_ASYNC); | |
692d7b5d | 2501 | |
c46234eb DW |
2502 | /* Set up strparser */ |
2503 | memset(&cb, 0, sizeof(cb)); | |
2504 | cb.rcv_msg = tls_queue; | |
2505 | cb.parse_msg = tls_read_size; | |
2506 | ||
f66de3ee | 2507 | strp_init(&sw_ctx_rx->strp, sk, &cb); |
c46234eb DW |
2508 | } |
2509 | ||
2510 | goto out; | |
3c4d7559 DW |
2511 | |
2512 | free_aead: | |
c46234eb DW |
2513 | crypto_free_aead(*aead); |
2514 | *aead = NULL; | |
3c4d7559 | 2515 | free_rec_seq: |
c46234eb DW |
2516 | kfree(cctx->rec_seq); |
2517 | cctx->rec_seq = NULL; | |
3c4d7559 | 2518 | free_iv: |
f66de3ee BP |
2519 | kfree(cctx->iv); |
2520 | cctx->iv = NULL; | |
cf6d43ef | 2521 | free_priv: |
f66de3ee BP |
2522 | if (tx) { |
2523 | kfree(ctx->priv_ctx_tx); | |
2524 | ctx->priv_ctx_tx = NULL; | |
2525 | } else { | |
2526 | kfree(ctx->priv_ctx_rx); | |
2527 | ctx->priv_ctx_rx = NULL; | |
2528 | } | |
3c4d7559 DW |
2529 | out: |
2530 | return rc; | |
2531 | } |