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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 DW |
39 | #include <linux/module.h> |
40 | #include <crypto/aead.h> | |
41 | ||
c46234eb | 42 | #include <net/strparser.h> |
3c4d7559 DW |
43 | #include <net/tls.h> |
44 | ||
b16520f7 KC |
45 | #define MAX_IV_SIZE TLS_CIPHER_AES_GCM_128_IV_SIZE |
46 | ||
0927f71d DRK |
47 | static int __skb_nsg(struct sk_buff *skb, int offset, int len, |
48 | unsigned int recursion_level) | |
49 | { | |
50 | int start = skb_headlen(skb); | |
51 | int i, chunk = start - offset; | |
52 | struct sk_buff *frag_iter; | |
53 | int elt = 0; | |
54 | ||
55 | if (unlikely(recursion_level >= 24)) | |
56 | return -EMSGSIZE; | |
57 | ||
58 | if (chunk > 0) { | |
59 | if (chunk > len) | |
60 | chunk = len; | |
61 | elt++; | |
62 | len -= chunk; | |
63 | if (len == 0) | |
64 | return elt; | |
65 | offset += chunk; | |
66 | } | |
67 | ||
68 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
69 | int end; | |
70 | ||
71 | WARN_ON(start > offset + len); | |
72 | ||
73 | end = start + skb_frag_size(&skb_shinfo(skb)->frags[i]); | |
74 | chunk = end - offset; | |
75 | if (chunk > 0) { | |
76 | if (chunk > len) | |
77 | chunk = len; | |
78 | elt++; | |
79 | len -= chunk; | |
80 | if (len == 0) | |
81 | return elt; | |
82 | offset += chunk; | |
83 | } | |
84 | start = end; | |
85 | } | |
86 | ||
87 | if (unlikely(skb_has_frag_list(skb))) { | |
88 | skb_walk_frags(skb, frag_iter) { | |
89 | int end, ret; | |
90 | ||
91 | WARN_ON(start > offset + len); | |
92 | ||
93 | end = start + frag_iter->len; | |
94 | chunk = end - offset; | |
95 | if (chunk > 0) { | |
96 | if (chunk > len) | |
97 | chunk = len; | |
98 | ret = __skb_nsg(frag_iter, offset - start, chunk, | |
99 | recursion_level + 1); | |
100 | if (unlikely(ret < 0)) | |
101 | return ret; | |
102 | elt += ret; | |
103 | len -= chunk; | |
104 | if (len == 0) | |
105 | return elt; | |
106 | offset += chunk; | |
107 | } | |
108 | start = end; | |
109 | } | |
110 | } | |
111 | BUG_ON(len); | |
112 | return elt; | |
113 | } | |
114 | ||
115 | /* Return the number of scatterlist elements required to completely map the | |
116 | * skb, or -EMSGSIZE if the recursion depth is exceeded. | |
117 | */ | |
118 | static int skb_nsg(struct sk_buff *skb, int offset, int len) | |
119 | { | |
120 | return __skb_nsg(skb, offset, len, 0); | |
121 | } | |
122 | ||
94524d8f VG |
123 | static void tls_decrypt_done(struct crypto_async_request *req, int err) |
124 | { | |
125 | struct aead_request *aead_req = (struct aead_request *)req; | |
94524d8f | 126 | struct scatterlist *sgout = aead_req->dst; |
7a3dd8c8 JF |
127 | struct tls_sw_context_rx *ctx; |
128 | struct tls_context *tls_ctx; | |
94524d8f | 129 | struct scatterlist *sg; |
7a3dd8c8 | 130 | struct sk_buff *skb; |
94524d8f | 131 | unsigned int pages; |
7a3dd8c8 JF |
132 | int pending; |
133 | ||
134 | skb = (struct sk_buff *)req->data; | |
135 | tls_ctx = tls_get_ctx(skb->sk); | |
136 | ctx = tls_sw_ctx_rx(tls_ctx); | |
137 | pending = atomic_dec_return(&ctx->decrypt_pending); | |
94524d8f VG |
138 | |
139 | /* Propagate if there was an err */ | |
140 | if (err) { | |
141 | ctx->async_wait.err = err; | |
7a3dd8c8 | 142 | tls_err_abort(skb->sk, err); |
94524d8f VG |
143 | } |
144 | ||
7a3dd8c8 JF |
145 | /* After using skb->sk to propagate sk through crypto async callback |
146 | * we need to NULL it again. | |
147 | */ | |
148 | skb->sk = NULL; | |
149 | ||
94524d8f | 150 | /* Release the skb, pages and memory allocated for crypto req */ |
7a3dd8c8 | 151 | kfree_skb(skb); |
94524d8f VG |
152 | |
153 | /* Skip the first S/G entry as it points to AAD */ | |
154 | for_each_sg(sg_next(sgout), sg, UINT_MAX, pages) { | |
155 | if (!sg) | |
156 | break; | |
157 | put_page(sg_page(sg)); | |
158 | } | |
159 | ||
160 | kfree(aead_req); | |
161 | ||
162 | if (!pending && READ_ONCE(ctx->async_notify)) | |
163 | complete(&ctx->async_wait.completion); | |
164 | } | |
165 | ||
c46234eb | 166 | static int tls_do_decryption(struct sock *sk, |
94524d8f | 167 | struct sk_buff *skb, |
c46234eb DW |
168 | struct scatterlist *sgin, |
169 | struct scatterlist *sgout, | |
170 | char *iv_recv, | |
171 | size_t data_len, | |
94524d8f VG |
172 | struct aead_request *aead_req, |
173 | bool async) | |
c46234eb DW |
174 | { |
175 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 176 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 177 | int ret; |
c46234eb | 178 | |
0b243d00 | 179 | aead_request_set_tfm(aead_req, ctx->aead_recv); |
c46234eb DW |
180 | aead_request_set_ad(aead_req, TLS_AAD_SPACE_SIZE); |
181 | aead_request_set_crypt(aead_req, sgin, sgout, | |
182 | data_len + tls_ctx->rx.tag_size, | |
183 | (u8 *)iv_recv); | |
c46234eb | 184 | |
94524d8f | 185 | if (async) { |
7a3dd8c8 JF |
186 | /* Using skb->sk to push sk through to crypto async callback |
187 | * handler. This allows propagating errors up to the socket | |
188 | * if needed. It _must_ be cleared in the async handler | |
189 | * before kfree_skb is called. We _know_ skb->sk is NULL | |
190 | * because it is a clone from strparser. | |
191 | */ | |
192 | skb->sk = sk; | |
94524d8f VG |
193 | aead_request_set_callback(aead_req, |
194 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
195 | tls_decrypt_done, skb); | |
196 | atomic_inc(&ctx->decrypt_pending); | |
197 | } else { | |
198 | aead_request_set_callback(aead_req, | |
199 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
200 | crypto_req_done, &ctx->async_wait); | |
201 | } | |
202 | ||
203 | ret = crypto_aead_decrypt(aead_req); | |
204 | if (ret == -EINPROGRESS) { | |
205 | if (async) | |
206 | return ret; | |
207 | ||
208 | ret = crypto_wait_req(ret, &ctx->async_wait); | |
209 | } | |
210 | ||
211 | if (async) | |
212 | atomic_dec(&ctx->decrypt_pending); | |
213 | ||
c46234eb DW |
214 | return ret; |
215 | } | |
216 | ||
d829e9c4 | 217 | static void tls_trim_both_msgs(struct sock *sk, int target_size) |
3c4d7559 DW |
218 | { |
219 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 220 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 221 | struct tls_rec *rec = ctx->open_rec; |
3c4d7559 | 222 | |
d829e9c4 | 223 | sk_msg_trim(sk, &rec->msg_plaintext, target_size); |
3c4d7559 | 224 | if (target_size > 0) |
dbe42559 | 225 | target_size += tls_ctx->tx.overhead_size; |
d829e9c4 | 226 | sk_msg_trim(sk, &rec->msg_encrypted, target_size); |
3c4d7559 DW |
227 | } |
228 | ||
d829e9c4 | 229 | static int tls_alloc_encrypted_msg(struct sock *sk, int len) |
3c4d7559 DW |
230 | { |
231 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 232 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 233 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 | 234 | struct sk_msg *msg_en = &rec->msg_encrypted; |
3c4d7559 | 235 | |
d829e9c4 | 236 | return sk_msg_alloc(sk, msg_en, len, 0); |
3c4d7559 DW |
237 | } |
238 | ||
d829e9c4 | 239 | static int tls_clone_plaintext_msg(struct sock *sk, int required) |
3c4d7559 DW |
240 | { |
241 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 242 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 243 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
244 | struct sk_msg *msg_pl = &rec->msg_plaintext; |
245 | struct sk_msg *msg_en = &rec->msg_encrypted; | |
4e6d4720 | 246 | int skip, len; |
3c4d7559 | 247 | |
d829e9c4 DB |
248 | /* We add page references worth len bytes from encrypted sg |
249 | * at the end of plaintext sg. It is guaranteed that msg_en | |
4e6d4720 VG |
250 | * has enough required room (ensured by caller). |
251 | */ | |
d829e9c4 | 252 | len = required - msg_pl->sg.size; |
52ea992c | 253 | |
d829e9c4 DB |
254 | /* Skip initial bytes in msg_en's data to be able to use |
255 | * same offset of both plain and encrypted data. | |
4e6d4720 | 256 | */ |
d829e9c4 | 257 | skip = tls_ctx->tx.prepend_size + msg_pl->sg.size; |
4e6d4720 | 258 | |
d829e9c4 | 259 | return sk_msg_clone(sk, msg_pl, msg_en, skip, len); |
3c4d7559 DW |
260 | } |
261 | ||
d3b18ad3 | 262 | static struct tls_rec *tls_get_rec(struct sock *sk) |
3c4d7559 DW |
263 | { |
264 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 265 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
266 | struct sk_msg *msg_pl, *msg_en; |
267 | struct tls_rec *rec; | |
268 | int mem_size; | |
3c4d7559 | 269 | |
d3b18ad3 JF |
270 | mem_size = sizeof(struct tls_rec) + crypto_aead_reqsize(ctx->aead_send); |
271 | ||
272 | rec = kzalloc(mem_size, sk->sk_allocation); | |
a42055e8 | 273 | if (!rec) |
d3b18ad3 JF |
274 | return NULL; |
275 | ||
276 | msg_pl = &rec->msg_plaintext; | |
277 | msg_en = &rec->msg_encrypted; | |
278 | ||
279 | sk_msg_init(msg_pl); | |
280 | sk_msg_init(msg_en); | |
281 | ||
282 | sg_init_table(rec->sg_aead_in, 2); | |
283 | sg_set_buf(&rec->sg_aead_in[0], rec->aad_space, | |
284 | sizeof(rec->aad_space)); | |
285 | sg_unmark_end(&rec->sg_aead_in[1]); | |
286 | ||
287 | sg_init_table(rec->sg_aead_out, 2); | |
288 | sg_set_buf(&rec->sg_aead_out[0], rec->aad_space, | |
289 | sizeof(rec->aad_space)); | |
290 | sg_unmark_end(&rec->sg_aead_out[1]); | |
291 | ||
292 | return rec; | |
293 | } | |
a42055e8 | 294 | |
d3b18ad3 JF |
295 | static void tls_free_rec(struct sock *sk, struct tls_rec *rec) |
296 | { | |
d829e9c4 DB |
297 | sk_msg_free(sk, &rec->msg_encrypted); |
298 | sk_msg_free(sk, &rec->msg_plaintext); | |
c774973e | 299 | kfree(rec); |
a42055e8 VG |
300 | } |
301 | ||
d3b18ad3 JF |
302 | static void tls_free_open_rec(struct sock *sk) |
303 | { | |
304 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
305 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
306 | struct tls_rec *rec = ctx->open_rec; | |
307 | ||
308 | if (rec) { | |
309 | tls_free_rec(sk, rec); | |
310 | ctx->open_rec = NULL; | |
311 | } | |
312 | } | |
313 | ||
a42055e8 VG |
314 | int tls_tx_records(struct sock *sk, int flags) |
315 | { | |
316 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
317 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
318 | struct tls_rec *rec, *tmp; | |
d829e9c4 | 319 | struct sk_msg *msg_en; |
a42055e8 VG |
320 | int tx_flags, rc = 0; |
321 | ||
322 | if (tls_is_partially_sent_record(tls_ctx)) { | |
9932a29a | 323 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
324 | struct tls_rec, list); |
325 | ||
326 | if (flags == -1) | |
327 | tx_flags = rec->tx_flags; | |
328 | else | |
329 | tx_flags = flags; | |
330 | ||
331 | rc = tls_push_partial_record(sk, tls_ctx, tx_flags); | |
332 | if (rc) | |
333 | goto tx_err; | |
334 | ||
335 | /* Full record has been transmitted. | |
9932a29a | 336 | * Remove the head of tx_list |
a42055e8 | 337 | */ |
a42055e8 | 338 | list_del(&rec->list); |
d829e9c4 | 339 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
340 | kfree(rec); |
341 | } | |
342 | ||
9932a29a VG |
343 | /* Tx all ready records */ |
344 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { | |
345 | if (READ_ONCE(rec->tx_ready)) { | |
a42055e8 VG |
346 | if (flags == -1) |
347 | tx_flags = rec->tx_flags; | |
348 | else | |
349 | tx_flags = flags; | |
350 | ||
d829e9c4 | 351 | msg_en = &rec->msg_encrypted; |
a42055e8 | 352 | rc = tls_push_sg(sk, tls_ctx, |
d829e9c4 | 353 | &msg_en->sg.data[msg_en->sg.curr], |
a42055e8 VG |
354 | 0, tx_flags); |
355 | if (rc) | |
356 | goto tx_err; | |
357 | ||
a42055e8 | 358 | list_del(&rec->list); |
d829e9c4 | 359 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
360 | kfree(rec); |
361 | } else { | |
362 | break; | |
363 | } | |
364 | } | |
365 | ||
366 | tx_err: | |
367 | if (rc < 0 && rc != -EAGAIN) | |
368 | tls_err_abort(sk, EBADMSG); | |
369 | ||
370 | return rc; | |
371 | } | |
372 | ||
373 | static void tls_encrypt_done(struct crypto_async_request *req, int err) | |
374 | { | |
375 | struct aead_request *aead_req = (struct aead_request *)req; | |
376 | struct sock *sk = req->data; | |
377 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
378 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
d829e9c4 DB |
379 | struct scatterlist *sge; |
380 | struct sk_msg *msg_en; | |
a42055e8 VG |
381 | struct tls_rec *rec; |
382 | bool ready = false; | |
383 | int pending; | |
384 | ||
385 | rec = container_of(aead_req, struct tls_rec, aead_req); | |
d829e9c4 | 386 | msg_en = &rec->msg_encrypted; |
a42055e8 | 387 | |
d829e9c4 DB |
388 | sge = sk_msg_elem(msg_en, msg_en->sg.curr); |
389 | sge->offset -= tls_ctx->tx.prepend_size; | |
390 | sge->length += tls_ctx->tx.prepend_size; | |
a42055e8 | 391 | |
80ece6a0 | 392 | /* Check if error is previously set on socket */ |
a42055e8 | 393 | if (err || sk->sk_err) { |
a42055e8 VG |
394 | rec = NULL; |
395 | ||
396 | /* If err is already set on socket, return the same code */ | |
397 | if (sk->sk_err) { | |
398 | ctx->async_wait.err = sk->sk_err; | |
399 | } else { | |
400 | ctx->async_wait.err = err; | |
401 | tls_err_abort(sk, err); | |
402 | } | |
403 | } | |
404 | ||
9932a29a VG |
405 | if (rec) { |
406 | struct tls_rec *first_rec; | |
407 | ||
408 | /* Mark the record as ready for transmission */ | |
409 | smp_store_mb(rec->tx_ready, true); | |
410 | ||
411 | /* If received record is at head of tx_list, schedule tx */ | |
412 | first_rec = list_first_entry(&ctx->tx_list, | |
413 | struct tls_rec, list); | |
414 | if (rec == first_rec) | |
415 | ready = true; | |
416 | } | |
a42055e8 VG |
417 | |
418 | pending = atomic_dec_return(&ctx->encrypt_pending); | |
419 | ||
420 | if (!pending && READ_ONCE(ctx->async_notify)) | |
421 | complete(&ctx->async_wait.completion); | |
422 | ||
423 | if (!ready) | |
424 | return; | |
425 | ||
426 | /* Schedule the transmission */ | |
427 | if (!test_and_set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
d829e9c4 | 428 | schedule_delayed_work(&ctx->tx_work.work, 1); |
3c4d7559 DW |
429 | } |
430 | ||
a42055e8 VG |
431 | static int tls_do_encryption(struct sock *sk, |
432 | struct tls_context *tls_ctx, | |
a447da7d DB |
433 | struct tls_sw_context_tx *ctx, |
434 | struct aead_request *aead_req, | |
d829e9c4 | 435 | size_t data_len, u32 start) |
3c4d7559 | 436 | { |
a42055e8 | 437 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
438 | struct sk_msg *msg_en = &rec->msg_encrypted; |
439 | struct scatterlist *sge = sk_msg_elem(msg_en, start); | |
3c4d7559 DW |
440 | int rc; |
441 | ||
d829e9c4 DB |
442 | sge->offset += tls_ctx->tx.prepend_size; |
443 | sge->length -= tls_ctx->tx.prepend_size; | |
3c4d7559 | 444 | |
d829e9c4 | 445 | msg_en->sg.curr = start; |
4e6d4720 | 446 | |
3c4d7559 DW |
447 | aead_request_set_tfm(aead_req, ctx->aead_send); |
448 | aead_request_set_ad(aead_req, TLS_AAD_SPACE_SIZE); | |
d829e9c4 DB |
449 | aead_request_set_crypt(aead_req, rec->sg_aead_in, |
450 | rec->sg_aead_out, | |
dbe42559 | 451 | data_len, tls_ctx->tx.iv); |
a54667f6 VG |
452 | |
453 | aead_request_set_callback(aead_req, CRYPTO_TFM_REQ_MAY_BACKLOG, | |
a42055e8 VG |
454 | tls_encrypt_done, sk); |
455 | ||
9932a29a VG |
456 | /* Add the record in tx_list */ |
457 | list_add_tail((struct list_head *)&rec->list, &ctx->tx_list); | |
a42055e8 | 458 | atomic_inc(&ctx->encrypt_pending); |
a54667f6 | 459 | |
a42055e8 VG |
460 | rc = crypto_aead_encrypt(aead_req); |
461 | if (!rc || rc != -EINPROGRESS) { | |
462 | atomic_dec(&ctx->encrypt_pending); | |
d829e9c4 DB |
463 | sge->offset -= tls_ctx->tx.prepend_size; |
464 | sge->length += tls_ctx->tx.prepend_size; | |
a42055e8 | 465 | } |
3c4d7559 | 466 | |
9932a29a VG |
467 | if (!rc) { |
468 | WRITE_ONCE(rec->tx_ready, true); | |
469 | } else if (rc != -EINPROGRESS) { | |
470 | list_del(&rec->list); | |
a42055e8 | 471 | return rc; |
9932a29a | 472 | } |
3c4d7559 | 473 | |
a42055e8 VG |
474 | /* Unhook the record from context if encryption is not failure */ |
475 | ctx->open_rec = NULL; | |
476 | tls_advance_record_sn(sk, &tls_ctx->tx); | |
3c4d7559 DW |
477 | return rc; |
478 | } | |
479 | ||
d3b18ad3 JF |
480 | static int tls_split_open_record(struct sock *sk, struct tls_rec *from, |
481 | struct tls_rec **to, struct sk_msg *msg_opl, | |
482 | struct sk_msg *msg_oen, u32 split_point, | |
483 | u32 tx_overhead_size, u32 *orig_end) | |
484 | { | |
485 | u32 i, j, bytes = 0, apply = msg_opl->apply_bytes; | |
486 | struct scatterlist *sge, *osge, *nsge; | |
487 | u32 orig_size = msg_opl->sg.size; | |
488 | struct scatterlist tmp = { }; | |
489 | struct sk_msg *msg_npl; | |
490 | struct tls_rec *new; | |
491 | int ret; | |
492 | ||
493 | new = tls_get_rec(sk); | |
494 | if (!new) | |
495 | return -ENOMEM; | |
496 | ret = sk_msg_alloc(sk, &new->msg_encrypted, msg_opl->sg.size + | |
497 | tx_overhead_size, 0); | |
498 | if (ret < 0) { | |
499 | tls_free_rec(sk, new); | |
500 | return ret; | |
501 | } | |
502 | ||
503 | *orig_end = msg_opl->sg.end; | |
504 | i = msg_opl->sg.start; | |
505 | sge = sk_msg_elem(msg_opl, i); | |
506 | while (apply && sge->length) { | |
507 | if (sge->length > apply) { | |
508 | u32 len = sge->length - apply; | |
509 | ||
510 | get_page(sg_page(sge)); | |
511 | sg_set_page(&tmp, sg_page(sge), len, | |
512 | sge->offset + apply); | |
513 | sge->length = apply; | |
514 | bytes += apply; | |
515 | apply = 0; | |
516 | } else { | |
517 | apply -= sge->length; | |
518 | bytes += sge->length; | |
519 | } | |
520 | ||
521 | sk_msg_iter_var_next(i); | |
522 | if (i == msg_opl->sg.end) | |
523 | break; | |
524 | sge = sk_msg_elem(msg_opl, i); | |
525 | } | |
526 | ||
527 | msg_opl->sg.end = i; | |
528 | msg_opl->sg.curr = i; | |
529 | msg_opl->sg.copybreak = 0; | |
530 | msg_opl->apply_bytes = 0; | |
531 | msg_opl->sg.size = bytes; | |
532 | ||
533 | msg_npl = &new->msg_plaintext; | |
534 | msg_npl->apply_bytes = apply; | |
535 | msg_npl->sg.size = orig_size - bytes; | |
536 | ||
537 | j = msg_npl->sg.start; | |
538 | nsge = sk_msg_elem(msg_npl, j); | |
539 | if (tmp.length) { | |
540 | memcpy(nsge, &tmp, sizeof(*nsge)); | |
541 | sk_msg_iter_var_next(j); | |
542 | nsge = sk_msg_elem(msg_npl, j); | |
543 | } | |
544 | ||
545 | osge = sk_msg_elem(msg_opl, i); | |
546 | while (osge->length) { | |
547 | memcpy(nsge, osge, sizeof(*nsge)); | |
548 | sg_unmark_end(nsge); | |
549 | sk_msg_iter_var_next(i); | |
550 | sk_msg_iter_var_next(j); | |
551 | if (i == *orig_end) | |
552 | break; | |
553 | osge = sk_msg_elem(msg_opl, i); | |
554 | nsge = sk_msg_elem(msg_npl, j); | |
555 | } | |
556 | ||
557 | msg_npl->sg.end = j; | |
558 | msg_npl->sg.curr = j; | |
559 | msg_npl->sg.copybreak = 0; | |
560 | ||
561 | *to = new; | |
562 | return 0; | |
563 | } | |
564 | ||
565 | static void tls_merge_open_record(struct sock *sk, struct tls_rec *to, | |
566 | struct tls_rec *from, u32 orig_end) | |
567 | { | |
568 | struct sk_msg *msg_npl = &from->msg_plaintext; | |
569 | struct sk_msg *msg_opl = &to->msg_plaintext; | |
570 | struct scatterlist *osge, *nsge; | |
571 | u32 i, j; | |
572 | ||
573 | i = msg_opl->sg.end; | |
574 | sk_msg_iter_var_prev(i); | |
575 | j = msg_npl->sg.start; | |
576 | ||
577 | osge = sk_msg_elem(msg_opl, i); | |
578 | nsge = sk_msg_elem(msg_npl, j); | |
579 | ||
580 | if (sg_page(osge) == sg_page(nsge) && | |
581 | osge->offset + osge->length == nsge->offset) { | |
582 | osge->length += nsge->length; | |
583 | put_page(sg_page(nsge)); | |
584 | } | |
585 | ||
586 | msg_opl->sg.end = orig_end; | |
587 | msg_opl->sg.curr = orig_end; | |
588 | msg_opl->sg.copybreak = 0; | |
589 | msg_opl->apply_bytes = msg_opl->sg.size + msg_npl->sg.size; | |
590 | msg_opl->sg.size += msg_npl->sg.size; | |
591 | ||
592 | sk_msg_free(sk, &to->msg_encrypted); | |
593 | sk_msg_xfer_full(&to->msg_encrypted, &from->msg_encrypted); | |
594 | ||
595 | kfree(from); | |
596 | } | |
597 | ||
3c4d7559 DW |
598 | static int tls_push_record(struct sock *sk, int flags, |
599 | unsigned char record_type) | |
600 | { | |
601 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 602 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
603 | struct tls_rec *rec = ctx->open_rec, *tmp = NULL; |
604 | u32 i, split_point, uninitialized_var(orig_end); | |
d829e9c4 | 605 | struct sk_msg *msg_pl, *msg_en; |
a447da7d | 606 | struct aead_request *req; |
d3b18ad3 | 607 | bool split; |
3c4d7559 DW |
608 | int rc; |
609 | ||
a42055e8 VG |
610 | if (!rec) |
611 | return 0; | |
a447da7d | 612 | |
d829e9c4 DB |
613 | msg_pl = &rec->msg_plaintext; |
614 | msg_en = &rec->msg_encrypted; | |
615 | ||
d3b18ad3 JF |
616 | split_point = msg_pl->apply_bytes; |
617 | split = split_point && split_point < msg_pl->sg.size; | |
618 | if (split) { | |
619 | rc = tls_split_open_record(sk, rec, &tmp, msg_pl, msg_en, | |
620 | split_point, tls_ctx->tx.overhead_size, | |
621 | &orig_end); | |
622 | if (rc < 0) | |
623 | return rc; | |
624 | sk_msg_trim(sk, msg_en, msg_pl->sg.size + | |
625 | tls_ctx->tx.overhead_size); | |
626 | } | |
627 | ||
a42055e8 VG |
628 | rec->tx_flags = flags; |
629 | req = &rec->aead_req; | |
3c4d7559 | 630 | |
d829e9c4 DB |
631 | i = msg_pl->sg.end; |
632 | sk_msg_iter_var_prev(i); | |
633 | sg_mark_end(sk_msg_elem(msg_pl, i)); | |
a42055e8 | 634 | |
d829e9c4 DB |
635 | i = msg_pl->sg.start; |
636 | sg_chain(rec->sg_aead_in, 2, rec->inplace_crypto ? | |
637 | &msg_en->sg.data[i] : &msg_pl->sg.data[i]); | |
638 | ||
639 | i = msg_en->sg.end; | |
640 | sk_msg_iter_var_prev(i); | |
641 | sg_mark_end(sk_msg_elem(msg_en, i)); | |
642 | ||
643 | i = msg_en->sg.start; | |
644 | sg_chain(rec->sg_aead_out, 2, &msg_en->sg.data[i]); | |
645 | ||
646 | tls_make_aad(rec->aad_space, msg_pl->sg.size, | |
dbe42559 | 647 | tls_ctx->tx.rec_seq, tls_ctx->tx.rec_seq_size, |
3c4d7559 DW |
648 | record_type); |
649 | ||
650 | tls_fill_prepend(tls_ctx, | |
d829e9c4 DB |
651 | page_address(sg_page(&msg_en->sg.data[i])) + |
652 | msg_en->sg.data[i].offset, msg_pl->sg.size, | |
653 | record_type); | |
3c4d7559 | 654 | |
d829e9c4 | 655 | tls_ctx->pending_open_record_frags = false; |
3c4d7559 | 656 | |
d829e9c4 | 657 | rc = tls_do_encryption(sk, tls_ctx, ctx, req, msg_pl->sg.size, i); |
a42055e8 | 658 | if (rc < 0) { |
d3b18ad3 | 659 | if (rc != -EINPROGRESS) { |
d829e9c4 | 660 | tls_err_abort(sk, EBADMSG); |
d3b18ad3 JF |
661 | if (split) { |
662 | tls_ctx->pending_open_record_frags = true; | |
663 | tls_merge_open_record(sk, rec, tmp, orig_end); | |
664 | } | |
665 | } | |
a42055e8 | 666 | return rc; |
d3b18ad3 JF |
667 | } else if (split) { |
668 | msg_pl = &tmp->msg_plaintext; | |
669 | msg_en = &tmp->msg_encrypted; | |
670 | sk_msg_trim(sk, msg_en, msg_pl->sg.size + | |
671 | tls_ctx->tx.overhead_size); | |
672 | tls_ctx->pending_open_record_frags = true; | |
673 | ctx->open_rec = tmp; | |
a42055e8 | 674 | } |
3c4d7559 | 675 | |
9932a29a | 676 | return tls_tx_records(sk, flags); |
3c4d7559 DW |
677 | } |
678 | ||
d3b18ad3 JF |
679 | static int bpf_exec_tx_verdict(struct sk_msg *msg, struct sock *sk, |
680 | bool full_record, u8 record_type, | |
681 | size_t *copied, int flags) | |
3c4d7559 DW |
682 | { |
683 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 684 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
685 | struct sk_msg msg_redir = { }; |
686 | struct sk_psock *psock; | |
687 | struct sock *sk_redir; | |
a42055e8 | 688 | struct tls_rec *rec; |
0608c69c | 689 | bool enospc, policy; |
d3b18ad3 | 690 | int err = 0, send; |
7246d8ed | 691 | u32 delta = 0; |
d3b18ad3 | 692 | |
0608c69c | 693 | policy = !(flags & MSG_SENDPAGE_NOPOLICY); |
d3b18ad3 | 694 | psock = sk_psock_get(sk); |
0608c69c | 695 | if (!psock || !policy) |
d3b18ad3 JF |
696 | return tls_push_record(sk, flags, record_type); |
697 | more_data: | |
698 | enospc = sk_msg_full(msg); | |
7246d8ed JF |
699 | if (psock->eval == __SK_NONE) { |
700 | delta = msg->sg.size; | |
d3b18ad3 | 701 | psock->eval = sk_psock_msg_verdict(sk, psock, msg); |
7246d8ed JF |
702 | if (delta < msg->sg.size) |
703 | delta -= msg->sg.size; | |
704 | else | |
705 | delta = 0; | |
706 | } | |
d3b18ad3 JF |
707 | if (msg->cork_bytes && msg->cork_bytes > msg->sg.size && |
708 | !enospc && !full_record) { | |
709 | err = -ENOSPC; | |
710 | goto out_err; | |
711 | } | |
712 | msg->cork_bytes = 0; | |
713 | send = msg->sg.size; | |
714 | if (msg->apply_bytes && msg->apply_bytes < send) | |
715 | send = msg->apply_bytes; | |
716 | ||
717 | switch (psock->eval) { | |
718 | case __SK_PASS: | |
719 | err = tls_push_record(sk, flags, record_type); | |
720 | if (err < 0) { | |
721 | *copied -= sk_msg_free(sk, msg); | |
722 | tls_free_open_rec(sk); | |
723 | goto out_err; | |
724 | } | |
725 | break; | |
726 | case __SK_REDIRECT: | |
727 | sk_redir = psock->sk_redir; | |
728 | memcpy(&msg_redir, msg, sizeof(*msg)); | |
729 | if (msg->apply_bytes < send) | |
730 | msg->apply_bytes = 0; | |
731 | else | |
732 | msg->apply_bytes -= send; | |
733 | sk_msg_return_zero(sk, msg, send); | |
734 | msg->sg.size -= send; | |
735 | release_sock(sk); | |
736 | err = tcp_bpf_sendmsg_redir(sk_redir, &msg_redir, send, flags); | |
737 | lock_sock(sk); | |
738 | if (err < 0) { | |
739 | *copied -= sk_msg_free_nocharge(sk, &msg_redir); | |
740 | msg->sg.size = 0; | |
741 | } | |
742 | if (msg->sg.size == 0) | |
743 | tls_free_open_rec(sk); | |
744 | break; | |
745 | case __SK_DROP: | |
746 | default: | |
747 | sk_msg_free_partial(sk, msg, send); | |
748 | if (msg->apply_bytes < send) | |
749 | msg->apply_bytes = 0; | |
750 | else | |
751 | msg->apply_bytes -= send; | |
752 | if (msg->sg.size == 0) | |
753 | tls_free_open_rec(sk); | |
7246d8ed | 754 | *copied -= (send + delta); |
d3b18ad3 JF |
755 | err = -EACCES; |
756 | } | |
a42055e8 | 757 | |
d3b18ad3 JF |
758 | if (likely(!err)) { |
759 | bool reset_eval = !ctx->open_rec; | |
a42055e8 | 760 | |
d3b18ad3 JF |
761 | rec = ctx->open_rec; |
762 | if (rec) { | |
763 | msg = &rec->msg_plaintext; | |
764 | if (!msg->apply_bytes) | |
765 | reset_eval = true; | |
766 | } | |
767 | if (reset_eval) { | |
768 | psock->eval = __SK_NONE; | |
769 | if (psock->sk_redir) { | |
770 | sock_put(psock->sk_redir); | |
771 | psock->sk_redir = NULL; | |
772 | } | |
773 | } | |
774 | if (rec) | |
775 | goto more_data; | |
776 | } | |
777 | out_err: | |
778 | sk_psock_put(sk, psock); | |
779 | return err; | |
780 | } | |
781 | ||
782 | static int tls_sw_push_pending_record(struct sock *sk, int flags) | |
783 | { | |
784 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
785 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
786 | struct tls_rec *rec = ctx->open_rec; | |
787 | struct sk_msg *msg_pl; | |
788 | size_t copied; | |
a42055e8 | 789 | |
a42055e8 | 790 | if (!rec) |
d3b18ad3 | 791 | return 0; |
a42055e8 | 792 | |
d829e9c4 | 793 | msg_pl = &rec->msg_plaintext; |
d3b18ad3 JF |
794 | copied = msg_pl->sg.size; |
795 | if (!copied) | |
796 | return 0; | |
a42055e8 | 797 | |
d3b18ad3 JF |
798 | return bpf_exec_tx_verdict(msg_pl, sk, true, TLS_RECORD_TYPE_DATA, |
799 | &copied, flags); | |
a42055e8 VG |
800 | } |
801 | ||
802 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) | |
803 | { | |
3c4d7559 | 804 | long timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
a42055e8 VG |
805 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
806 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
807 | struct crypto_tfm *tfm = crypto_aead_tfm(ctx->aead_send); | |
808 | bool async_capable = tfm->__crt_alg->cra_flags & CRYPTO_ALG_ASYNC; | |
809 | unsigned char record_type = TLS_RECORD_TYPE_DATA; | |
00e23707 | 810 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
3c4d7559 DW |
811 | bool eor = !(msg->msg_flags & MSG_MORE); |
812 | size_t try_to_copy, copied = 0; | |
d829e9c4 | 813 | struct sk_msg *msg_pl, *msg_en; |
a42055e8 VG |
814 | struct tls_rec *rec; |
815 | int required_size; | |
816 | int num_async = 0; | |
3c4d7559 | 817 | bool full_record; |
a42055e8 VG |
818 | int record_room; |
819 | int num_zc = 0; | |
3c4d7559 | 820 | int orig_size; |
4128c0cf | 821 | int ret = 0; |
3c4d7559 DW |
822 | |
823 | if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL)) | |
824 | return -ENOTSUPP; | |
825 | ||
826 | lock_sock(sk); | |
827 | ||
a42055e8 VG |
828 | /* Wait till there is any pending write on socket */ |
829 | if (unlikely(sk->sk_write_pending)) { | |
830 | ret = wait_on_pending_writer(sk, &timeo); | |
831 | if (unlikely(ret)) | |
832 | goto send_end; | |
833 | } | |
3c4d7559 DW |
834 | |
835 | if (unlikely(msg->msg_controllen)) { | |
836 | ret = tls_proccess_cmsg(sk, msg, &record_type); | |
a42055e8 VG |
837 | if (ret) { |
838 | if (ret == -EINPROGRESS) | |
839 | num_async++; | |
840 | else if (ret != -EAGAIN) | |
841 | goto send_end; | |
842 | } | |
3c4d7559 DW |
843 | } |
844 | ||
845 | while (msg_data_left(msg)) { | |
846 | if (sk->sk_err) { | |
30be8f8d | 847 | ret = -sk->sk_err; |
3c4d7559 DW |
848 | goto send_end; |
849 | } | |
850 | ||
d3b18ad3 JF |
851 | if (ctx->open_rec) |
852 | rec = ctx->open_rec; | |
853 | else | |
854 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
855 | if (!rec) { |
856 | ret = -ENOMEM; | |
857 | goto send_end; | |
858 | } | |
859 | ||
d829e9c4 DB |
860 | msg_pl = &rec->msg_plaintext; |
861 | msg_en = &rec->msg_encrypted; | |
862 | ||
863 | orig_size = msg_pl->sg.size; | |
3c4d7559 DW |
864 | full_record = false; |
865 | try_to_copy = msg_data_left(msg); | |
d829e9c4 | 866 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
3c4d7559 DW |
867 | if (try_to_copy >= record_room) { |
868 | try_to_copy = record_room; | |
869 | full_record = true; | |
870 | } | |
871 | ||
d829e9c4 | 872 | required_size = msg_pl->sg.size + try_to_copy + |
dbe42559 | 873 | tls_ctx->tx.overhead_size; |
3c4d7559 DW |
874 | |
875 | if (!sk_stream_memory_free(sk)) | |
876 | goto wait_for_sndbuf; | |
a42055e8 | 877 | |
3c4d7559 | 878 | alloc_encrypted: |
d829e9c4 | 879 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
880 | if (ret) { |
881 | if (ret != -ENOSPC) | |
882 | goto wait_for_memory; | |
883 | ||
884 | /* Adjust try_to_copy according to the amount that was | |
885 | * actually allocated. The difference is due | |
886 | * to max sg elements limit | |
887 | */ | |
d829e9c4 | 888 | try_to_copy -= required_size - msg_en->sg.size; |
3c4d7559 DW |
889 | full_record = true; |
890 | } | |
a42055e8 VG |
891 | |
892 | if (!is_kvec && (full_record || eor) && !async_capable) { | |
d3b18ad3 JF |
893 | u32 first = msg_pl->sg.end; |
894 | ||
d829e9c4 DB |
895 | ret = sk_msg_zerocopy_from_iter(sk, &msg->msg_iter, |
896 | msg_pl, try_to_copy); | |
3c4d7559 DW |
897 | if (ret) |
898 | goto fallback_to_reg_send; | |
899 | ||
4e6d4720 VG |
900 | rec->inplace_crypto = 0; |
901 | ||
a42055e8 | 902 | num_zc++; |
3c4d7559 | 903 | copied += try_to_copy; |
d3b18ad3 JF |
904 | |
905 | sk_msg_sg_copy_set(msg_pl, first); | |
906 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, | |
907 | record_type, &copied, | |
908 | msg->msg_flags); | |
a42055e8 VG |
909 | if (ret) { |
910 | if (ret == -EINPROGRESS) | |
911 | num_async++; | |
d3b18ad3 JF |
912 | else if (ret == -ENOMEM) |
913 | goto wait_for_memory; | |
914 | else if (ret == -ENOSPC) | |
915 | goto rollback_iter; | |
a42055e8 VG |
916 | else if (ret != -EAGAIN) |
917 | goto send_end; | |
918 | } | |
5a3611ef | 919 | continue; |
d3b18ad3 JF |
920 | rollback_iter: |
921 | copied -= try_to_copy; | |
922 | sk_msg_sg_copy_clear(msg_pl, first); | |
923 | iov_iter_revert(&msg->msg_iter, | |
924 | msg_pl->sg.size - orig_size); | |
3c4d7559 | 925 | fallback_to_reg_send: |
d829e9c4 | 926 | sk_msg_trim(sk, msg_pl, orig_size); |
3c4d7559 DW |
927 | } |
928 | ||
d829e9c4 | 929 | required_size = msg_pl->sg.size + try_to_copy; |
4e6d4720 | 930 | |
d829e9c4 | 931 | ret = tls_clone_plaintext_msg(sk, required_size); |
3c4d7559 DW |
932 | if (ret) { |
933 | if (ret != -ENOSPC) | |
4e6d4720 | 934 | goto send_end; |
3c4d7559 DW |
935 | |
936 | /* Adjust try_to_copy according to the amount that was | |
937 | * actually allocated. The difference is due | |
938 | * to max sg elements limit | |
939 | */ | |
d829e9c4 | 940 | try_to_copy -= required_size - msg_pl->sg.size; |
3c4d7559 | 941 | full_record = true; |
d829e9c4 DB |
942 | sk_msg_trim(sk, msg_en, msg_pl->sg.size + |
943 | tls_ctx->tx.overhead_size); | |
3c4d7559 DW |
944 | } |
945 | ||
65a10e28 VG |
946 | if (try_to_copy) { |
947 | ret = sk_msg_memcopy_from_iter(sk, &msg->msg_iter, | |
948 | msg_pl, try_to_copy); | |
949 | if (ret < 0) | |
950 | goto trim_sgl; | |
951 | } | |
3c4d7559 | 952 | |
d829e9c4 DB |
953 | /* Open records defined only if successfully copied, otherwise |
954 | * we would trim the sg but not reset the open record frags. | |
955 | */ | |
956 | tls_ctx->pending_open_record_frags = true; | |
3c4d7559 DW |
957 | copied += try_to_copy; |
958 | if (full_record || eor) { | |
d3b18ad3 JF |
959 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
960 | record_type, &copied, | |
961 | msg->msg_flags); | |
3c4d7559 | 962 | if (ret) { |
a42055e8 VG |
963 | if (ret == -EINPROGRESS) |
964 | num_async++; | |
d3b18ad3 JF |
965 | else if (ret == -ENOMEM) |
966 | goto wait_for_memory; | |
967 | else if (ret != -EAGAIN) { | |
968 | if (ret == -ENOSPC) | |
969 | ret = 0; | |
a42055e8 | 970 | goto send_end; |
d3b18ad3 | 971 | } |
3c4d7559 DW |
972 | } |
973 | } | |
974 | ||
975 | continue; | |
976 | ||
977 | wait_for_sndbuf: | |
978 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
979 | wait_for_memory: | |
980 | ret = sk_stream_wait_memory(sk, &timeo); | |
981 | if (ret) { | |
982 | trim_sgl: | |
d829e9c4 | 983 | tls_trim_both_msgs(sk, orig_size); |
3c4d7559 DW |
984 | goto send_end; |
985 | } | |
986 | ||
d829e9c4 | 987 | if (msg_en->sg.size < required_size) |
3c4d7559 | 988 | goto alloc_encrypted; |
3c4d7559 DW |
989 | } |
990 | ||
a42055e8 VG |
991 | if (!num_async) { |
992 | goto send_end; | |
993 | } else if (num_zc) { | |
994 | /* Wait for pending encryptions to get completed */ | |
995 | smp_store_mb(ctx->async_notify, true); | |
996 | ||
997 | if (atomic_read(&ctx->encrypt_pending)) | |
998 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); | |
999 | else | |
1000 | reinit_completion(&ctx->async_wait.completion); | |
1001 | ||
1002 | WRITE_ONCE(ctx->async_notify, false); | |
1003 | ||
1004 | if (ctx->async_wait.err) { | |
1005 | ret = ctx->async_wait.err; | |
1006 | copied = 0; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | /* Transmit if any encryptions have completed */ | |
1011 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1012 | cancel_delayed_work(&ctx->tx_work.work); | |
1013 | tls_tx_records(sk, msg->msg_flags); | |
1014 | } | |
1015 | ||
3c4d7559 DW |
1016 | send_end: |
1017 | ret = sk_stream_error(sk, msg->msg_flags, ret); | |
1018 | ||
1019 | release_sock(sk); | |
1020 | return copied ? copied : ret; | |
1021 | } | |
1022 | ||
0608c69c JF |
1023 | int tls_sw_do_sendpage(struct sock *sk, struct page *page, |
1024 | int offset, size_t size, int flags) | |
3c4d7559 | 1025 | { |
a42055e8 | 1026 | long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
3c4d7559 | 1027 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 1028 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
3c4d7559 | 1029 | unsigned char record_type = TLS_RECORD_TYPE_DATA; |
d829e9c4 | 1030 | struct sk_msg *msg_pl; |
a42055e8 VG |
1031 | struct tls_rec *rec; |
1032 | int num_async = 0; | |
d3b18ad3 | 1033 | size_t copied = 0; |
3c4d7559 DW |
1034 | bool full_record; |
1035 | int record_room; | |
4128c0cf | 1036 | int ret = 0; |
a42055e8 | 1037 | bool eor; |
3c4d7559 | 1038 | |
3c4d7559 | 1039 | eor = !(flags & (MSG_MORE | MSG_SENDPAGE_NOTLAST)); |
3c4d7559 DW |
1040 | sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1041 | ||
a42055e8 VG |
1042 | /* Wait till there is any pending write on socket */ |
1043 | if (unlikely(sk->sk_write_pending)) { | |
1044 | ret = wait_on_pending_writer(sk, &timeo); | |
1045 | if (unlikely(ret)) | |
1046 | goto sendpage_end; | |
1047 | } | |
3c4d7559 DW |
1048 | |
1049 | /* Call the sk_stream functions to manage the sndbuf mem. */ | |
1050 | while (size > 0) { | |
1051 | size_t copy, required_size; | |
1052 | ||
1053 | if (sk->sk_err) { | |
30be8f8d | 1054 | ret = -sk->sk_err; |
3c4d7559 DW |
1055 | goto sendpage_end; |
1056 | } | |
1057 | ||
d3b18ad3 JF |
1058 | if (ctx->open_rec) |
1059 | rec = ctx->open_rec; | |
1060 | else | |
1061 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
1062 | if (!rec) { |
1063 | ret = -ENOMEM; | |
1064 | goto sendpage_end; | |
1065 | } | |
1066 | ||
d829e9c4 DB |
1067 | msg_pl = &rec->msg_plaintext; |
1068 | ||
3c4d7559 | 1069 | full_record = false; |
d829e9c4 | 1070 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
d3b18ad3 | 1071 | copied = 0; |
3c4d7559 DW |
1072 | copy = size; |
1073 | if (copy >= record_room) { | |
1074 | copy = record_room; | |
1075 | full_record = true; | |
1076 | } | |
d829e9c4 DB |
1077 | |
1078 | required_size = msg_pl->sg.size + copy + | |
1079 | tls_ctx->tx.overhead_size; | |
3c4d7559 DW |
1080 | |
1081 | if (!sk_stream_memory_free(sk)) | |
1082 | goto wait_for_sndbuf; | |
1083 | alloc_payload: | |
d829e9c4 | 1084 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
1085 | if (ret) { |
1086 | if (ret != -ENOSPC) | |
1087 | goto wait_for_memory; | |
1088 | ||
1089 | /* Adjust copy according to the amount that was | |
1090 | * actually allocated. The difference is due | |
1091 | * to max sg elements limit | |
1092 | */ | |
d829e9c4 | 1093 | copy -= required_size - msg_pl->sg.size; |
3c4d7559 DW |
1094 | full_record = true; |
1095 | } | |
1096 | ||
d829e9c4 | 1097 | sk_msg_page_add(msg_pl, page, copy, offset); |
3c4d7559 | 1098 | sk_mem_charge(sk, copy); |
d829e9c4 | 1099 | |
3c4d7559 DW |
1100 | offset += copy; |
1101 | size -= copy; | |
d3b18ad3 | 1102 | copied += copy; |
3c4d7559 | 1103 | |
d829e9c4 DB |
1104 | tls_ctx->pending_open_record_frags = true; |
1105 | if (full_record || eor || sk_msg_full(msg_pl)) { | |
4e6d4720 | 1106 | rec->inplace_crypto = 0; |
d3b18ad3 JF |
1107 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
1108 | record_type, &copied, flags); | |
3c4d7559 | 1109 | if (ret) { |
a42055e8 VG |
1110 | if (ret == -EINPROGRESS) |
1111 | num_async++; | |
d3b18ad3 JF |
1112 | else if (ret == -ENOMEM) |
1113 | goto wait_for_memory; | |
1114 | else if (ret != -EAGAIN) { | |
1115 | if (ret == -ENOSPC) | |
1116 | ret = 0; | |
a42055e8 | 1117 | goto sendpage_end; |
d3b18ad3 | 1118 | } |
3c4d7559 DW |
1119 | } |
1120 | } | |
1121 | continue; | |
1122 | wait_for_sndbuf: | |
1123 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
1124 | wait_for_memory: | |
1125 | ret = sk_stream_wait_memory(sk, &timeo); | |
1126 | if (ret) { | |
d829e9c4 | 1127 | tls_trim_both_msgs(sk, msg_pl->sg.size); |
3c4d7559 DW |
1128 | goto sendpage_end; |
1129 | } | |
1130 | ||
3c4d7559 DW |
1131 | goto alloc_payload; |
1132 | } | |
1133 | ||
a42055e8 VG |
1134 | if (num_async) { |
1135 | /* Transmit if any encryptions have completed */ | |
1136 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1137 | cancel_delayed_work(&ctx->tx_work.work); | |
1138 | tls_tx_records(sk, flags); | |
1139 | } | |
1140 | } | |
3c4d7559 | 1141 | sendpage_end: |
d3b18ad3 | 1142 | ret = sk_stream_error(sk, flags, ret); |
d3b18ad3 | 1143 | return copied ? copied : ret; |
3c4d7559 DW |
1144 | } |
1145 | ||
0608c69c JF |
1146 | int tls_sw_sendpage_locked(struct sock *sk, struct page *page, |
1147 | int offset, size_t size, int flags) | |
1148 | { | |
1149 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1150 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY)) | |
1151 | return -ENOTSUPP; | |
1152 | ||
1153 | return tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1154 | } | |
1155 | ||
1156 | int tls_sw_sendpage(struct sock *sk, struct page *page, | |
1157 | int offset, size_t size, int flags) | |
1158 | { | |
1159 | int ret; | |
1160 | ||
1161 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1162 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY)) | |
1163 | return -ENOTSUPP; | |
1164 | ||
1165 | lock_sock(sk); | |
1166 | ret = tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1167 | release_sock(sk); | |
1168 | return ret; | |
1169 | } | |
1170 | ||
d3b18ad3 JF |
1171 | static struct sk_buff *tls_wait_data(struct sock *sk, struct sk_psock *psock, |
1172 | int flags, long timeo, int *err) | |
c46234eb DW |
1173 | { |
1174 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1175 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
1176 | struct sk_buff *skb; |
1177 | DEFINE_WAIT_FUNC(wait, woken_wake_function); | |
1178 | ||
d3b18ad3 | 1179 | while (!(skb = ctx->recv_pkt) && sk_psock_queue_empty(psock)) { |
c46234eb DW |
1180 | if (sk->sk_err) { |
1181 | *err = sock_error(sk); | |
1182 | return NULL; | |
1183 | } | |
1184 | ||
fcf4793e DRK |
1185 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1186 | return NULL; | |
1187 | ||
c46234eb DW |
1188 | if (sock_flag(sk, SOCK_DONE)) |
1189 | return NULL; | |
1190 | ||
1191 | if ((flags & MSG_DONTWAIT) || !timeo) { | |
1192 | *err = -EAGAIN; | |
1193 | return NULL; | |
1194 | } | |
1195 | ||
1196 | add_wait_queue(sk_sleep(sk), &wait); | |
1197 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); | |
d3b18ad3 JF |
1198 | sk_wait_event(sk, &timeo, |
1199 | ctx->recv_pkt != skb || | |
1200 | !sk_psock_queue_empty(psock), | |
1201 | &wait); | |
c46234eb DW |
1202 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
1203 | remove_wait_queue(sk_sleep(sk), &wait); | |
1204 | ||
1205 | /* Handle signals */ | |
1206 | if (signal_pending(current)) { | |
1207 | *err = sock_intr_errno(timeo); | |
1208 | return NULL; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | return skb; | |
1213 | } | |
1214 | ||
d829e9c4 DB |
1215 | static int tls_setup_from_iter(struct sock *sk, struct iov_iter *from, |
1216 | int length, int *pages_used, | |
1217 | unsigned int *size_used, | |
1218 | struct scatterlist *to, | |
1219 | int to_max_pages) | |
1220 | { | |
1221 | int rc = 0, i = 0, num_elem = *pages_used, maxpages; | |
1222 | struct page *pages[MAX_SKB_FRAGS]; | |
1223 | unsigned int size = *size_used; | |
1224 | ssize_t copied, use; | |
1225 | size_t offset; | |
1226 | ||
1227 | while (length > 0) { | |
1228 | i = 0; | |
1229 | maxpages = to_max_pages - num_elem; | |
1230 | if (maxpages == 0) { | |
1231 | rc = -EFAULT; | |
1232 | goto out; | |
1233 | } | |
1234 | copied = iov_iter_get_pages(from, pages, | |
1235 | length, | |
1236 | maxpages, &offset); | |
1237 | if (copied <= 0) { | |
1238 | rc = -EFAULT; | |
1239 | goto out; | |
1240 | } | |
1241 | ||
1242 | iov_iter_advance(from, copied); | |
1243 | ||
1244 | length -= copied; | |
1245 | size += copied; | |
1246 | while (copied) { | |
1247 | use = min_t(int, copied, PAGE_SIZE - offset); | |
1248 | ||
1249 | sg_set_page(&to[num_elem], | |
1250 | pages[i], use, offset); | |
1251 | sg_unmark_end(&to[num_elem]); | |
1252 | /* We do not uncharge memory from this API */ | |
1253 | ||
1254 | offset = 0; | |
1255 | copied -= use; | |
1256 | ||
1257 | i++; | |
1258 | num_elem++; | |
1259 | } | |
1260 | } | |
1261 | /* Mark the end in the last sg entry if newly added */ | |
1262 | if (num_elem > *pages_used) | |
1263 | sg_mark_end(&to[num_elem - 1]); | |
1264 | out: | |
1265 | if (rc) | |
1266 | iov_iter_revert(from, size - *size_used); | |
1267 | *size_used = size; | |
1268 | *pages_used = num_elem; | |
1269 | ||
1270 | return rc; | |
1271 | } | |
1272 | ||
0b243d00 VG |
1273 | /* This function decrypts the input skb into either out_iov or in out_sg |
1274 | * or in skb buffers itself. The input parameter 'zc' indicates if | |
1275 | * zero-copy mode needs to be tried or not. With zero-copy mode, either | |
1276 | * out_iov or out_sg must be non-NULL. In case both out_iov and out_sg are | |
1277 | * NULL, then the decryption happens inside skb buffers itself, i.e. | |
1278 | * zero-copy gets disabled and 'zc' is updated. | |
1279 | */ | |
1280 | ||
1281 | static int decrypt_internal(struct sock *sk, struct sk_buff *skb, | |
1282 | struct iov_iter *out_iov, | |
1283 | struct scatterlist *out_sg, | |
1284 | int *chunk, bool *zc) | |
1285 | { | |
1286 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1287 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
1288 | struct strp_msg *rxm = strp_msg(skb); | |
1289 | int n_sgin, n_sgout, nsg, mem_size, aead_size, err, pages = 0; | |
1290 | struct aead_request *aead_req; | |
1291 | struct sk_buff *unused; | |
1292 | u8 *aad, *iv, *mem = NULL; | |
1293 | struct scatterlist *sgin = NULL; | |
1294 | struct scatterlist *sgout = NULL; | |
1295 | const int data_len = rxm->full_len - tls_ctx->rx.overhead_size; | |
1296 | ||
1297 | if (*zc && (out_iov || out_sg)) { | |
1298 | if (out_iov) | |
1299 | n_sgout = iov_iter_npages(out_iov, INT_MAX) + 1; | |
1300 | else | |
1301 | n_sgout = sg_nents(out_sg); | |
0927f71d DRK |
1302 | n_sgin = skb_nsg(skb, rxm->offset + tls_ctx->rx.prepend_size, |
1303 | rxm->full_len - tls_ctx->rx.prepend_size); | |
0b243d00 VG |
1304 | } else { |
1305 | n_sgout = 0; | |
1306 | *zc = false; | |
0927f71d | 1307 | n_sgin = skb_cow_data(skb, 0, &unused); |
0b243d00 VG |
1308 | } |
1309 | ||
0b243d00 VG |
1310 | if (n_sgin < 1) |
1311 | return -EBADMSG; | |
1312 | ||
1313 | /* Increment to accommodate AAD */ | |
1314 | n_sgin = n_sgin + 1; | |
1315 | ||
1316 | nsg = n_sgin + n_sgout; | |
1317 | ||
1318 | aead_size = sizeof(*aead_req) + crypto_aead_reqsize(ctx->aead_recv); | |
1319 | mem_size = aead_size + (nsg * sizeof(struct scatterlist)); | |
1320 | mem_size = mem_size + TLS_AAD_SPACE_SIZE; | |
1321 | mem_size = mem_size + crypto_aead_ivsize(ctx->aead_recv); | |
1322 | ||
1323 | /* Allocate a single block of memory which contains | |
1324 | * aead_req || sgin[] || sgout[] || aad || iv. | |
1325 | * This order achieves correct alignment for aead_req, sgin, sgout. | |
1326 | */ | |
1327 | mem = kmalloc(mem_size, sk->sk_allocation); | |
1328 | if (!mem) | |
1329 | return -ENOMEM; | |
1330 | ||
1331 | /* Segment the allocated memory */ | |
1332 | aead_req = (struct aead_request *)mem; | |
1333 | sgin = (struct scatterlist *)(mem + aead_size); | |
1334 | sgout = sgin + n_sgin; | |
1335 | aad = (u8 *)(sgout + n_sgout); | |
1336 | iv = aad + TLS_AAD_SPACE_SIZE; | |
1337 | ||
1338 | /* Prepare IV */ | |
1339 | err = skb_copy_bits(skb, rxm->offset + TLS_HEADER_SIZE, | |
1340 | iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, | |
1341 | tls_ctx->rx.iv_size); | |
1342 | if (err < 0) { | |
1343 | kfree(mem); | |
1344 | return err; | |
1345 | } | |
1346 | memcpy(iv, tls_ctx->rx.iv, TLS_CIPHER_AES_GCM_128_SALT_SIZE); | |
1347 | ||
1348 | /* Prepare AAD */ | |
1349 | tls_make_aad(aad, rxm->full_len - tls_ctx->rx.overhead_size, | |
1350 | tls_ctx->rx.rec_seq, tls_ctx->rx.rec_seq_size, | |
1351 | ctx->control); | |
1352 | ||
1353 | /* Prepare sgin */ | |
1354 | sg_init_table(sgin, n_sgin); | |
1355 | sg_set_buf(&sgin[0], aad, TLS_AAD_SPACE_SIZE); | |
1356 | err = skb_to_sgvec(skb, &sgin[1], | |
1357 | rxm->offset + tls_ctx->rx.prepend_size, | |
1358 | rxm->full_len - tls_ctx->rx.prepend_size); | |
1359 | if (err < 0) { | |
1360 | kfree(mem); | |
1361 | return err; | |
1362 | } | |
1363 | ||
1364 | if (n_sgout) { | |
1365 | if (out_iov) { | |
1366 | sg_init_table(sgout, n_sgout); | |
1367 | sg_set_buf(&sgout[0], aad, TLS_AAD_SPACE_SIZE); | |
1368 | ||
1369 | *chunk = 0; | |
d829e9c4 DB |
1370 | err = tls_setup_from_iter(sk, out_iov, data_len, |
1371 | &pages, chunk, &sgout[1], | |
1372 | (n_sgout - 1)); | |
0b243d00 VG |
1373 | if (err < 0) |
1374 | goto fallback_to_reg_recv; | |
1375 | } else if (out_sg) { | |
1376 | memcpy(sgout, out_sg, n_sgout * sizeof(*sgout)); | |
1377 | } else { | |
1378 | goto fallback_to_reg_recv; | |
1379 | } | |
1380 | } else { | |
1381 | fallback_to_reg_recv: | |
1382 | sgout = sgin; | |
1383 | pages = 0; | |
1384 | *chunk = 0; | |
1385 | *zc = false; | |
1386 | } | |
1387 | ||
1388 | /* Prepare and submit AEAD request */ | |
94524d8f VG |
1389 | err = tls_do_decryption(sk, skb, sgin, sgout, iv, |
1390 | data_len, aead_req, *zc); | |
1391 | if (err == -EINPROGRESS) | |
1392 | return err; | |
0b243d00 VG |
1393 | |
1394 | /* Release the pages in case iov was mapped to pages */ | |
1395 | for (; pages > 0; pages--) | |
1396 | put_page(sg_page(&sgout[pages])); | |
1397 | ||
1398 | kfree(mem); | |
1399 | return err; | |
1400 | } | |
1401 | ||
dafb67f3 | 1402 | static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb, |
0b243d00 | 1403 | struct iov_iter *dest, int *chunk, bool *zc) |
dafb67f3 BP |
1404 | { |
1405 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1406 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
1407 | struct strp_msg *rxm = strp_msg(skb); | |
1408 | int err = 0; | |
1409 | ||
4799ac81 BP |
1410 | #ifdef CONFIG_TLS_DEVICE |
1411 | err = tls_device_decrypted(sk, skb); | |
dafb67f3 BP |
1412 | if (err < 0) |
1413 | return err; | |
4799ac81 BP |
1414 | #endif |
1415 | if (!ctx->decrypted) { | |
0b243d00 | 1416 | err = decrypt_internal(sk, skb, dest, NULL, chunk, zc); |
94524d8f VG |
1417 | if (err < 0) { |
1418 | if (err == -EINPROGRESS) | |
1419 | tls_advance_record_sn(sk, &tls_ctx->rx); | |
1420 | ||
4799ac81 | 1421 | return err; |
94524d8f | 1422 | } |
4799ac81 BP |
1423 | } else { |
1424 | *zc = false; | |
1425 | } | |
dafb67f3 BP |
1426 | |
1427 | rxm->offset += tls_ctx->rx.prepend_size; | |
1428 | rxm->full_len -= tls_ctx->rx.overhead_size; | |
1429 | tls_advance_record_sn(sk, &tls_ctx->rx); | |
1430 | ctx->decrypted = true; | |
1431 | ctx->saved_data_ready(sk); | |
1432 | ||
1433 | return err; | |
1434 | } | |
1435 | ||
1436 | int decrypt_skb(struct sock *sk, struct sk_buff *skb, | |
1437 | struct scatterlist *sgout) | |
c46234eb | 1438 | { |
0b243d00 VG |
1439 | bool zc = true; |
1440 | int chunk; | |
c46234eb | 1441 | |
0b243d00 | 1442 | return decrypt_internal(sk, skb, NULL, sgout, &chunk, &zc); |
c46234eb DW |
1443 | } |
1444 | ||
1445 | static bool tls_sw_advance_skb(struct sock *sk, struct sk_buff *skb, | |
1446 | unsigned int len) | |
1447 | { | |
1448 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1449 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 1450 | |
94524d8f VG |
1451 | if (skb) { |
1452 | struct strp_msg *rxm = strp_msg(skb); | |
c46234eb | 1453 | |
94524d8f VG |
1454 | if (len < rxm->full_len) { |
1455 | rxm->offset += len; | |
1456 | rxm->full_len -= len; | |
1457 | return false; | |
1458 | } | |
1459 | kfree_skb(skb); | |
c46234eb DW |
1460 | } |
1461 | ||
1462 | /* Finished with message */ | |
1463 | ctx->recv_pkt = NULL; | |
7170e604 | 1464 | __strp_unpause(&ctx->strp); |
c46234eb DW |
1465 | |
1466 | return true; | |
1467 | } | |
1468 | ||
1469 | int tls_sw_recvmsg(struct sock *sk, | |
1470 | struct msghdr *msg, | |
1471 | size_t len, | |
1472 | int nonblock, | |
1473 | int flags, | |
1474 | int *addr_len) | |
1475 | { | |
1476 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1477 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 | 1478 | struct sk_psock *psock; |
c46234eb DW |
1479 | unsigned char control; |
1480 | struct strp_msg *rxm; | |
1481 | struct sk_buff *skb; | |
1482 | ssize_t copied = 0; | |
1483 | bool cmsg = false; | |
06030dba | 1484 | int target, err = 0; |
c46234eb | 1485 | long timeo; |
00e23707 | 1486 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
94524d8f | 1487 | int num_async = 0; |
c46234eb DW |
1488 | |
1489 | flags |= nonblock; | |
1490 | ||
1491 | if (unlikely(flags & MSG_ERRQUEUE)) | |
1492 | return sock_recv_errqueue(sk, msg, len, SOL_IP, IP_RECVERR); | |
1493 | ||
d3b18ad3 | 1494 | psock = sk_psock_get(sk); |
c46234eb DW |
1495 | lock_sock(sk); |
1496 | ||
06030dba | 1497 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); |
c46234eb DW |
1498 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
1499 | do { | |
1500 | bool zc = false; | |
94524d8f | 1501 | bool async = false; |
c46234eb DW |
1502 | int chunk = 0; |
1503 | ||
d3b18ad3 JF |
1504 | skb = tls_wait_data(sk, psock, flags, timeo, &err); |
1505 | if (!skb) { | |
1506 | if (psock) { | |
02c558b2 JF |
1507 | int ret = __tcp_bpf_recvmsg(sk, psock, |
1508 | msg, len, flags); | |
d3b18ad3 JF |
1509 | |
1510 | if (ret > 0) { | |
1511 | copied += ret; | |
1512 | len -= ret; | |
1513 | continue; | |
1514 | } | |
1515 | } | |
c46234eb | 1516 | goto recv_end; |
d3b18ad3 | 1517 | } |
c46234eb DW |
1518 | |
1519 | rxm = strp_msg(skb); | |
94524d8f | 1520 | |
c46234eb DW |
1521 | if (!cmsg) { |
1522 | int cerr; | |
1523 | ||
1524 | cerr = put_cmsg(msg, SOL_TLS, TLS_GET_RECORD_TYPE, | |
1525 | sizeof(ctx->control), &ctx->control); | |
1526 | cmsg = true; | |
1527 | control = ctx->control; | |
1528 | if (ctx->control != TLS_RECORD_TYPE_DATA) { | |
1529 | if (cerr || msg->msg_flags & MSG_CTRUNC) { | |
1530 | err = -EIO; | |
1531 | goto recv_end; | |
1532 | } | |
1533 | } | |
1534 | } else if (control != ctx->control) { | |
1535 | goto recv_end; | |
1536 | } | |
1537 | ||
1538 | if (!ctx->decrypted) { | |
0b243d00 | 1539 | int to_copy = rxm->full_len - tls_ctx->rx.overhead_size; |
c46234eb | 1540 | |
0b243d00 VG |
1541 | if (!is_kvec && to_copy <= len && |
1542 | likely(!(flags & MSG_PEEK))) | |
c46234eb | 1543 | zc = true; |
0b243d00 VG |
1544 | |
1545 | err = decrypt_skb_update(sk, skb, &msg->msg_iter, | |
1546 | &chunk, &zc); | |
94524d8f | 1547 | if (err < 0 && err != -EINPROGRESS) { |
0b243d00 VG |
1548 | tls_err_abort(sk, EBADMSG); |
1549 | goto recv_end; | |
c46234eb | 1550 | } |
94524d8f VG |
1551 | |
1552 | if (err == -EINPROGRESS) { | |
1553 | async = true; | |
1554 | num_async++; | |
1555 | goto pick_next_record; | |
1556 | } | |
1557 | ||
c46234eb DW |
1558 | ctx->decrypted = true; |
1559 | } | |
1560 | ||
1561 | if (!zc) { | |
1562 | chunk = min_t(unsigned int, rxm->full_len, len); | |
94524d8f | 1563 | |
c46234eb DW |
1564 | err = skb_copy_datagram_msg(skb, rxm->offset, msg, |
1565 | chunk); | |
1566 | if (err < 0) | |
1567 | goto recv_end; | |
1568 | } | |
1569 | ||
94524d8f | 1570 | pick_next_record: |
c46234eb DW |
1571 | copied += chunk; |
1572 | len -= chunk; | |
1573 | if (likely(!(flags & MSG_PEEK))) { | |
1574 | u8 control = ctx->control; | |
1575 | ||
94524d8f VG |
1576 | /* For async, drop current skb reference */ |
1577 | if (async) | |
1578 | skb = NULL; | |
1579 | ||
c46234eb DW |
1580 | if (tls_sw_advance_skb(sk, skb, chunk)) { |
1581 | /* Return full control message to | |
1582 | * userspace before trying to parse | |
1583 | * another message type | |
1584 | */ | |
1585 | msg->msg_flags |= MSG_EOR; | |
1586 | if (control != TLS_RECORD_TYPE_DATA) | |
1587 | goto recv_end; | |
94524d8f VG |
1588 | } else { |
1589 | break; | |
c46234eb | 1590 | } |
50c6b58a DB |
1591 | } else { |
1592 | /* MSG_PEEK right now cannot look beyond current skb | |
1593 | * from strparser, meaning we cannot advance skb here | |
1594 | * and thus unpause strparser since we'd loose original | |
1595 | * one. | |
1596 | */ | |
1597 | break; | |
c46234eb | 1598 | } |
94524d8f | 1599 | |
06030dba DB |
1600 | /* If we have a new message from strparser, continue now. */ |
1601 | if (copied >= target && !ctx->recv_pkt) | |
1602 | break; | |
c46234eb DW |
1603 | } while (len); |
1604 | ||
1605 | recv_end: | |
94524d8f VG |
1606 | if (num_async) { |
1607 | /* Wait for all previously submitted records to be decrypted */ | |
1608 | smp_store_mb(ctx->async_notify, true); | |
1609 | if (atomic_read(&ctx->decrypt_pending)) { | |
1610 | err = crypto_wait_req(-EINPROGRESS, &ctx->async_wait); | |
1611 | if (err) { | |
1612 | /* one of async decrypt failed */ | |
1613 | tls_err_abort(sk, err); | |
1614 | copied = 0; | |
1615 | } | |
1616 | } else { | |
1617 | reinit_completion(&ctx->async_wait.completion); | |
1618 | } | |
1619 | WRITE_ONCE(ctx->async_notify, false); | |
1620 | } | |
1621 | ||
c46234eb | 1622 | release_sock(sk); |
d3b18ad3 JF |
1623 | if (psock) |
1624 | sk_psock_put(sk, psock); | |
c46234eb DW |
1625 | return copied ? : err; |
1626 | } | |
1627 | ||
1628 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, | |
1629 | struct pipe_inode_info *pipe, | |
1630 | size_t len, unsigned int flags) | |
1631 | { | |
1632 | struct tls_context *tls_ctx = tls_get_ctx(sock->sk); | |
f66de3ee | 1633 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
1634 | struct strp_msg *rxm = NULL; |
1635 | struct sock *sk = sock->sk; | |
1636 | struct sk_buff *skb; | |
1637 | ssize_t copied = 0; | |
1638 | int err = 0; | |
1639 | long timeo; | |
1640 | int chunk; | |
0b243d00 | 1641 | bool zc = false; |
c46234eb DW |
1642 | |
1643 | lock_sock(sk); | |
1644 | ||
1645 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
1646 | ||
d3b18ad3 | 1647 | skb = tls_wait_data(sk, NULL, flags, timeo, &err); |
c46234eb DW |
1648 | if (!skb) |
1649 | goto splice_read_end; | |
1650 | ||
1651 | /* splice does not support reading control messages */ | |
1652 | if (ctx->control != TLS_RECORD_TYPE_DATA) { | |
1653 | err = -ENOTSUPP; | |
1654 | goto splice_read_end; | |
1655 | } | |
1656 | ||
1657 | if (!ctx->decrypted) { | |
0b243d00 | 1658 | err = decrypt_skb_update(sk, skb, NULL, &chunk, &zc); |
c46234eb DW |
1659 | |
1660 | if (err < 0) { | |
1661 | tls_err_abort(sk, EBADMSG); | |
1662 | goto splice_read_end; | |
1663 | } | |
1664 | ctx->decrypted = true; | |
1665 | } | |
1666 | rxm = strp_msg(skb); | |
1667 | ||
1668 | chunk = min_t(unsigned int, rxm->full_len, len); | |
1669 | copied = skb_splice_bits(skb, sk, rxm->offset, pipe, chunk, flags); | |
1670 | if (copied < 0) | |
1671 | goto splice_read_end; | |
1672 | ||
1673 | if (likely(!(flags & MSG_PEEK))) | |
1674 | tls_sw_advance_skb(sk, skb, copied); | |
1675 | ||
1676 | splice_read_end: | |
1677 | release_sock(sk); | |
1678 | return copied ? : err; | |
1679 | } | |
1680 | ||
924ad65e | 1681 | bool tls_sw_stream_read(const struct sock *sk) |
c46234eb | 1682 | { |
c46234eb | 1683 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 1684 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 JF |
1685 | bool ingress_empty = true; |
1686 | struct sk_psock *psock; | |
c46234eb | 1687 | |
d3b18ad3 JF |
1688 | rcu_read_lock(); |
1689 | psock = sk_psock(sk); | |
1690 | if (psock) | |
1691 | ingress_empty = list_empty(&psock->ingress_msg); | |
1692 | rcu_read_unlock(); | |
c46234eb | 1693 | |
d3b18ad3 | 1694 | return !ingress_empty || ctx->recv_pkt; |
c46234eb DW |
1695 | } |
1696 | ||
1697 | static int tls_read_size(struct strparser *strp, struct sk_buff *skb) | |
1698 | { | |
1699 | struct tls_context *tls_ctx = tls_get_ctx(strp->sk); | |
f66de3ee | 1700 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
3463e51d | 1701 | char header[TLS_HEADER_SIZE + MAX_IV_SIZE]; |
c46234eb DW |
1702 | struct strp_msg *rxm = strp_msg(skb); |
1703 | size_t cipher_overhead; | |
1704 | size_t data_len = 0; | |
1705 | int ret; | |
1706 | ||
1707 | /* Verify that we have a full TLS header, or wait for more data */ | |
1708 | if (rxm->offset + tls_ctx->rx.prepend_size > skb->len) | |
1709 | return 0; | |
1710 | ||
3463e51d KC |
1711 | /* Sanity-check size of on-stack buffer. */ |
1712 | if (WARN_ON(tls_ctx->rx.prepend_size > sizeof(header))) { | |
1713 | ret = -EINVAL; | |
1714 | goto read_failure; | |
1715 | } | |
1716 | ||
c46234eb DW |
1717 | /* Linearize header to local buffer */ |
1718 | ret = skb_copy_bits(skb, rxm->offset, header, tls_ctx->rx.prepend_size); | |
1719 | ||
1720 | if (ret < 0) | |
1721 | goto read_failure; | |
1722 | ||
1723 | ctx->control = header[0]; | |
1724 | ||
1725 | data_len = ((header[4] & 0xFF) | (header[3] << 8)); | |
1726 | ||
1727 | cipher_overhead = tls_ctx->rx.tag_size + tls_ctx->rx.iv_size; | |
1728 | ||
1729 | if (data_len > TLS_MAX_PAYLOAD_SIZE + cipher_overhead) { | |
1730 | ret = -EMSGSIZE; | |
1731 | goto read_failure; | |
1732 | } | |
1733 | if (data_len < cipher_overhead) { | |
1734 | ret = -EBADMSG; | |
1735 | goto read_failure; | |
1736 | } | |
1737 | ||
86029d10 SD |
1738 | if (header[1] != TLS_VERSION_MINOR(tls_ctx->crypto_recv.info.version) || |
1739 | header[2] != TLS_VERSION_MAJOR(tls_ctx->crypto_recv.info.version)) { | |
c46234eb DW |
1740 | ret = -EINVAL; |
1741 | goto read_failure; | |
1742 | } | |
1743 | ||
4799ac81 BP |
1744 | #ifdef CONFIG_TLS_DEVICE |
1745 | handle_device_resync(strp->sk, TCP_SKB_CB(skb)->seq + rxm->offset, | |
1746 | *(u64*)tls_ctx->rx.rec_seq); | |
1747 | #endif | |
c46234eb DW |
1748 | return data_len + TLS_HEADER_SIZE; |
1749 | ||
1750 | read_failure: | |
1751 | tls_err_abort(strp->sk, ret); | |
1752 | ||
1753 | return ret; | |
1754 | } | |
1755 | ||
1756 | static void tls_queue(struct strparser *strp, struct sk_buff *skb) | |
1757 | { | |
1758 | struct tls_context *tls_ctx = tls_get_ctx(strp->sk); | |
f66de3ee | 1759 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
1760 | |
1761 | ctx->decrypted = false; | |
1762 | ||
1763 | ctx->recv_pkt = skb; | |
1764 | strp_pause(strp); | |
1765 | ||
ad13acce | 1766 | ctx->saved_data_ready(strp->sk); |
c46234eb DW |
1767 | } |
1768 | ||
1769 | static void tls_data_ready(struct sock *sk) | |
1770 | { | |
1771 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1772 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 | 1773 | struct sk_psock *psock; |
c46234eb DW |
1774 | |
1775 | strp_data_ready(&ctx->strp); | |
d3b18ad3 JF |
1776 | |
1777 | psock = sk_psock_get(sk); | |
1778 | if (psock && !list_empty(&psock->ingress_msg)) { | |
1779 | ctx->saved_data_ready(sk); | |
1780 | sk_psock_put(sk, psock); | |
1781 | } | |
c46234eb DW |
1782 | } |
1783 | ||
f66de3ee | 1784 | void tls_sw_free_resources_tx(struct sock *sk) |
3c4d7559 DW |
1785 | { |
1786 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1787 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 VG |
1788 | struct tls_rec *rec, *tmp; |
1789 | ||
1790 | /* Wait for any pending async encryptions to complete */ | |
1791 | smp_store_mb(ctx->async_notify, true); | |
1792 | if (atomic_read(&ctx->encrypt_pending)) | |
1793 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); | |
1794 | ||
1795 | cancel_delayed_work_sync(&ctx->tx_work.work); | |
1796 | ||
1797 | /* Tx whatever records we can transmit and abandon the rest */ | |
1798 | tls_tx_records(sk, -1); | |
1799 | ||
9932a29a | 1800 | /* Free up un-sent records in tx_list. First, free |
a42055e8 VG |
1801 | * the partially sent record if any at head of tx_list. |
1802 | */ | |
1803 | if (tls_ctx->partially_sent_record) { | |
1804 | struct scatterlist *sg = tls_ctx->partially_sent_record; | |
1805 | ||
1806 | while (1) { | |
1807 | put_page(sg_page(sg)); | |
1808 | sk_mem_uncharge(sk, sg->length); | |
1809 | ||
1810 | if (sg_is_last(sg)) | |
1811 | break; | |
1812 | sg++; | |
1813 | } | |
1814 | ||
1815 | tls_ctx->partially_sent_record = NULL; | |
1816 | ||
9932a29a | 1817 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
1818 | struct tls_rec, list); |
1819 | list_del(&rec->list); | |
d829e9c4 | 1820 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
1821 | kfree(rec); |
1822 | } | |
1823 | ||
9932a29a | 1824 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { |
a42055e8 | 1825 | list_del(&rec->list); |
d829e9c4 DB |
1826 | sk_msg_free(sk, &rec->msg_encrypted); |
1827 | sk_msg_free(sk, &rec->msg_plaintext); | |
a42055e8 VG |
1828 | kfree(rec); |
1829 | } | |
3c4d7559 | 1830 | |
201876b3 | 1831 | crypto_free_aead(ctx->aead_send); |
c774973e | 1832 | tls_free_open_rec(sk); |
f66de3ee BP |
1833 | |
1834 | kfree(ctx); | |
1835 | } | |
1836 | ||
39f56e1a | 1837 | void tls_sw_release_resources_rx(struct sock *sk) |
f66de3ee BP |
1838 | { |
1839 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1840 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
1841 | ||
c46234eb | 1842 | if (ctx->aead_recv) { |
201876b3 VG |
1843 | kfree_skb(ctx->recv_pkt); |
1844 | ctx->recv_pkt = NULL; | |
c46234eb DW |
1845 | crypto_free_aead(ctx->aead_recv); |
1846 | strp_stop(&ctx->strp); | |
1847 | write_lock_bh(&sk->sk_callback_lock); | |
1848 | sk->sk_data_ready = ctx->saved_data_ready; | |
1849 | write_unlock_bh(&sk->sk_callback_lock); | |
1850 | release_sock(sk); | |
1851 | strp_done(&ctx->strp); | |
1852 | lock_sock(sk); | |
1853 | } | |
39f56e1a BP |
1854 | } |
1855 | ||
1856 | void tls_sw_free_resources_rx(struct sock *sk) | |
1857 | { | |
1858 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1859 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
1860 | ||
1861 | tls_sw_release_resources_rx(sk); | |
3c4d7559 | 1862 | |
3c4d7559 DW |
1863 | kfree(ctx); |
1864 | } | |
1865 | ||
9932a29a | 1866 | /* The work handler to transmitt the encrypted records in tx_list */ |
a42055e8 VG |
1867 | static void tx_work_handler(struct work_struct *work) |
1868 | { | |
1869 | struct delayed_work *delayed_work = to_delayed_work(work); | |
1870 | struct tx_work *tx_work = container_of(delayed_work, | |
1871 | struct tx_work, work); | |
1872 | struct sock *sk = tx_work->sk; | |
1873 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1874 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
1875 | ||
1876 | if (!test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
1877 | return; | |
1878 | ||
1879 | lock_sock(sk); | |
1880 | tls_tx_records(sk, -1); | |
1881 | release_sock(sk); | |
1882 | } | |
1883 | ||
c46234eb | 1884 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx) |
3c4d7559 | 1885 | { |
3c4d7559 DW |
1886 | struct tls_crypto_info *crypto_info; |
1887 | struct tls12_crypto_info_aes_gcm_128 *gcm_128_info; | |
f66de3ee BP |
1888 | struct tls_sw_context_tx *sw_ctx_tx = NULL; |
1889 | struct tls_sw_context_rx *sw_ctx_rx = NULL; | |
c46234eb DW |
1890 | struct cipher_context *cctx; |
1891 | struct crypto_aead **aead; | |
1892 | struct strp_callbacks cb; | |
3c4d7559 DW |
1893 | u16 nonce_size, tag_size, iv_size, rec_seq_size; |
1894 | char *iv, *rec_seq; | |
1895 | int rc = 0; | |
1896 | ||
1897 | if (!ctx) { | |
1898 | rc = -EINVAL; | |
1899 | goto out; | |
1900 | } | |
1901 | ||
f66de3ee | 1902 | if (tx) { |
b190a587 BP |
1903 | if (!ctx->priv_ctx_tx) { |
1904 | sw_ctx_tx = kzalloc(sizeof(*sw_ctx_tx), GFP_KERNEL); | |
1905 | if (!sw_ctx_tx) { | |
1906 | rc = -ENOMEM; | |
1907 | goto out; | |
1908 | } | |
1909 | ctx->priv_ctx_tx = sw_ctx_tx; | |
1910 | } else { | |
1911 | sw_ctx_tx = | |
1912 | (struct tls_sw_context_tx *)ctx->priv_ctx_tx; | |
c46234eb | 1913 | } |
c46234eb | 1914 | } else { |
b190a587 BP |
1915 | if (!ctx->priv_ctx_rx) { |
1916 | sw_ctx_rx = kzalloc(sizeof(*sw_ctx_rx), GFP_KERNEL); | |
1917 | if (!sw_ctx_rx) { | |
1918 | rc = -ENOMEM; | |
1919 | goto out; | |
1920 | } | |
1921 | ctx->priv_ctx_rx = sw_ctx_rx; | |
1922 | } else { | |
1923 | sw_ctx_rx = | |
1924 | (struct tls_sw_context_rx *)ctx->priv_ctx_rx; | |
f66de3ee | 1925 | } |
3c4d7559 DW |
1926 | } |
1927 | ||
c46234eb | 1928 | if (tx) { |
b190a587 | 1929 | crypto_init_wait(&sw_ctx_tx->async_wait); |
86029d10 | 1930 | crypto_info = &ctx->crypto_send.info; |
c46234eb | 1931 | cctx = &ctx->tx; |
f66de3ee | 1932 | aead = &sw_ctx_tx->aead_send; |
9932a29a | 1933 | INIT_LIST_HEAD(&sw_ctx_tx->tx_list); |
a42055e8 VG |
1934 | INIT_DELAYED_WORK(&sw_ctx_tx->tx_work.work, tx_work_handler); |
1935 | sw_ctx_tx->tx_work.sk = sk; | |
c46234eb | 1936 | } else { |
b190a587 | 1937 | crypto_init_wait(&sw_ctx_rx->async_wait); |
86029d10 | 1938 | crypto_info = &ctx->crypto_recv.info; |
c46234eb | 1939 | cctx = &ctx->rx; |
f66de3ee | 1940 | aead = &sw_ctx_rx->aead_recv; |
c46234eb DW |
1941 | } |
1942 | ||
3c4d7559 DW |
1943 | switch (crypto_info->cipher_type) { |
1944 | case TLS_CIPHER_AES_GCM_128: { | |
1945 | nonce_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
1946 | tag_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
1947 | iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
1948 | iv = ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->iv; | |
1949 | rec_seq_size = TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE; | |
1950 | rec_seq = | |
1951 | ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->rec_seq; | |
1952 | gcm_128_info = | |
1953 | (struct tls12_crypto_info_aes_gcm_128 *)crypto_info; | |
1954 | break; | |
1955 | } | |
1956 | default: | |
1957 | rc = -EINVAL; | |
cf6d43ef | 1958 | goto free_priv; |
3c4d7559 DW |
1959 | } |
1960 | ||
b16520f7 | 1961 | /* Sanity-check the IV size for stack allocations. */ |
3463e51d | 1962 | if (iv_size > MAX_IV_SIZE || nonce_size > MAX_IV_SIZE) { |
b16520f7 KC |
1963 | rc = -EINVAL; |
1964 | goto free_priv; | |
1965 | } | |
1966 | ||
c46234eb DW |
1967 | cctx->prepend_size = TLS_HEADER_SIZE + nonce_size; |
1968 | cctx->tag_size = tag_size; | |
1969 | cctx->overhead_size = cctx->prepend_size + cctx->tag_size; | |
1970 | cctx->iv_size = iv_size; | |
1971 | cctx->iv = kmalloc(iv_size + TLS_CIPHER_AES_GCM_128_SALT_SIZE, | |
1972 | GFP_KERNEL); | |
1973 | if (!cctx->iv) { | |
3c4d7559 | 1974 | rc = -ENOMEM; |
cf6d43ef | 1975 | goto free_priv; |
3c4d7559 | 1976 | } |
c46234eb DW |
1977 | memcpy(cctx->iv, gcm_128_info->salt, TLS_CIPHER_AES_GCM_128_SALT_SIZE); |
1978 | memcpy(cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv, iv_size); | |
1979 | cctx->rec_seq_size = rec_seq_size; | |
969d5090 | 1980 | cctx->rec_seq = kmemdup(rec_seq, rec_seq_size, GFP_KERNEL); |
c46234eb | 1981 | if (!cctx->rec_seq) { |
3c4d7559 DW |
1982 | rc = -ENOMEM; |
1983 | goto free_iv; | |
1984 | } | |
c46234eb | 1985 | |
c46234eb DW |
1986 | if (!*aead) { |
1987 | *aead = crypto_alloc_aead("gcm(aes)", 0, 0); | |
1988 | if (IS_ERR(*aead)) { | |
1989 | rc = PTR_ERR(*aead); | |
1990 | *aead = NULL; | |
3c4d7559 DW |
1991 | goto free_rec_seq; |
1992 | } | |
1993 | } | |
1994 | ||
1995 | ctx->push_pending_record = tls_sw_push_pending_record; | |
1996 | ||
7cba09c6 | 1997 | rc = crypto_aead_setkey(*aead, gcm_128_info->key, |
3c4d7559 DW |
1998 | TLS_CIPHER_AES_GCM_128_KEY_SIZE); |
1999 | if (rc) | |
2000 | goto free_aead; | |
2001 | ||
c46234eb DW |
2002 | rc = crypto_aead_setauthsize(*aead, cctx->tag_size); |
2003 | if (rc) | |
2004 | goto free_aead; | |
2005 | ||
f66de3ee | 2006 | if (sw_ctx_rx) { |
c46234eb DW |
2007 | /* Set up strparser */ |
2008 | memset(&cb, 0, sizeof(cb)); | |
2009 | cb.rcv_msg = tls_queue; | |
2010 | cb.parse_msg = tls_read_size; | |
2011 | ||
f66de3ee | 2012 | strp_init(&sw_ctx_rx->strp, sk, &cb); |
c46234eb DW |
2013 | |
2014 | write_lock_bh(&sk->sk_callback_lock); | |
f66de3ee | 2015 | sw_ctx_rx->saved_data_ready = sk->sk_data_ready; |
c46234eb DW |
2016 | sk->sk_data_ready = tls_data_ready; |
2017 | write_unlock_bh(&sk->sk_callback_lock); | |
2018 | ||
f66de3ee | 2019 | strp_check_rcv(&sw_ctx_rx->strp); |
c46234eb DW |
2020 | } |
2021 | ||
2022 | goto out; | |
3c4d7559 DW |
2023 | |
2024 | free_aead: | |
c46234eb DW |
2025 | crypto_free_aead(*aead); |
2026 | *aead = NULL; | |
3c4d7559 | 2027 | free_rec_seq: |
c46234eb DW |
2028 | kfree(cctx->rec_seq); |
2029 | cctx->rec_seq = NULL; | |
3c4d7559 | 2030 | free_iv: |
f66de3ee BP |
2031 | kfree(cctx->iv); |
2032 | cctx->iv = NULL; | |
cf6d43ef | 2033 | free_priv: |
f66de3ee BP |
2034 | if (tx) { |
2035 | kfree(ctx->priv_ctx_tx); | |
2036 | ctx->priv_ctx_tx = NULL; | |
2037 | } else { | |
2038 | kfree(ctx->priv_ctx_rx); | |
2039 | ctx->priv_ctx_rx = NULL; | |
2040 | } | |
3c4d7559 DW |
2041 | out: |
2042 | return rc; | |
2043 | } |