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 | ||
da353fac | 38 | #include <linux/bug.h> |
c46234eb | 39 | #include <linux/sched/signal.h> |
3c4d7559 | 40 | #include <linux/module.h> |
974271e5 | 41 | #include <linux/splice.h> |
3c4d7559 DW |
42 | #include <crypto/aead.h> |
43 | ||
c46234eb | 44 | #include <net/strparser.h> |
3c4d7559 DW |
45 | #include <net/tls.h> |
46 | ||
58790314 JK |
47 | #include "tls.h" |
48 | ||
4175eac3 | 49 | struct tls_decrypt_arg { |
6bd116c8 | 50 | struct_group(inargs, |
4175eac3 JK |
51 | bool zc; |
52 | bool async; | |
ce61327c | 53 | u8 tail; |
6bd116c8 JK |
54 | ); |
55 | ||
56 | struct sk_buff *skb; | |
4175eac3 JK |
57 | }; |
58 | ||
b89fec54 JK |
59 | struct tls_decrypt_ctx { |
60 | u8 iv[MAX_IV_SIZE]; | |
61 | u8 aad[TLS_MAX_AAD_SIZE]; | |
62 | u8 tail; | |
63 | struct scatterlist sg[]; | |
64 | }; | |
65 | ||
da353fac DJ |
66 | noinline void tls_err_abort(struct sock *sk, int err) |
67 | { | |
68 | WARN_ON_ONCE(err >= 0); | |
69 | /* sk->sk_err should contain a positive error code. */ | |
70 | sk->sk_err = -err; | |
71 | sk_error_report(sk); | |
72 | } | |
73 | ||
0927f71d DRK |
74 | static int __skb_nsg(struct sk_buff *skb, int offset, int len, |
75 | unsigned int recursion_level) | |
76 | { | |
77 | int start = skb_headlen(skb); | |
78 | int i, chunk = start - offset; | |
79 | struct sk_buff *frag_iter; | |
80 | int elt = 0; | |
81 | ||
82 | if (unlikely(recursion_level >= 24)) | |
83 | return -EMSGSIZE; | |
84 | ||
85 | if (chunk > 0) { | |
86 | if (chunk > len) | |
87 | chunk = len; | |
88 | elt++; | |
89 | len -= chunk; | |
90 | if (len == 0) | |
91 | return elt; | |
92 | offset += chunk; | |
93 | } | |
94 | ||
95 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
96 | int end; | |
97 | ||
98 | WARN_ON(start > offset + len); | |
99 | ||
100 | end = start + skb_frag_size(&skb_shinfo(skb)->frags[i]); | |
101 | chunk = end - offset; | |
102 | if (chunk > 0) { | |
103 | if (chunk > len) | |
104 | chunk = len; | |
105 | elt++; | |
106 | len -= chunk; | |
107 | if (len == 0) | |
108 | return elt; | |
109 | offset += chunk; | |
110 | } | |
111 | start = end; | |
112 | } | |
113 | ||
114 | if (unlikely(skb_has_frag_list(skb))) { | |
115 | skb_walk_frags(skb, frag_iter) { | |
116 | int end, ret; | |
117 | ||
118 | WARN_ON(start > offset + len); | |
119 | ||
120 | end = start + frag_iter->len; | |
121 | chunk = end - offset; | |
122 | if (chunk > 0) { | |
123 | if (chunk > len) | |
124 | chunk = len; | |
125 | ret = __skb_nsg(frag_iter, offset - start, chunk, | |
126 | recursion_level + 1); | |
127 | if (unlikely(ret < 0)) | |
128 | return ret; | |
129 | elt += ret; | |
130 | len -= chunk; | |
131 | if (len == 0) | |
132 | return elt; | |
133 | offset += chunk; | |
134 | } | |
135 | start = end; | |
136 | } | |
137 | } | |
138 | BUG_ON(len); | |
139 | return elt; | |
140 | } | |
141 | ||
142 | /* Return the number of scatterlist elements required to completely map the | |
143 | * skb, or -EMSGSIZE if the recursion depth is exceeded. | |
144 | */ | |
145 | static int skb_nsg(struct sk_buff *skb, int offset, int len) | |
146 | { | |
147 | return __skb_nsg(skb, offset, len, 0); | |
148 | } | |
149 | ||
ce61327c JK |
150 | static int tls_padding_length(struct tls_prot_info *prot, struct sk_buff *skb, |
151 | struct tls_decrypt_arg *darg) | |
130b392c DW |
152 | { |
153 | struct strp_msg *rxm = strp_msg(skb); | |
c3f6bb74 | 154 | struct tls_msg *tlm = tls_msg(skb); |
130b392c DW |
155 | int sub = 0; |
156 | ||
157 | /* Determine zero-padding length */ | |
b53f4976 | 158 | if (prot->version == TLS_1_3_VERSION) { |
5deee41b | 159 | int offset = rxm->full_len - TLS_TAG_SIZE - 1; |
ce61327c | 160 | char content_type = darg->zc ? darg->tail : 0; |
130b392c | 161 | int err; |
130b392c DW |
162 | |
163 | while (content_type == 0) { | |
5deee41b | 164 | if (offset < prot->prepend_size) |
130b392c | 165 | return -EBADMSG; |
5deee41b | 166 | err = skb_copy_bits(skb, rxm->offset + offset, |
130b392c | 167 | &content_type, 1); |
b53f4976 JK |
168 | if (err) |
169 | return err; | |
130b392c DW |
170 | if (content_type) |
171 | break; | |
172 | sub++; | |
5deee41b | 173 | offset--; |
130b392c | 174 | } |
c3f6bb74 | 175 | tlm->control = content_type; |
130b392c DW |
176 | } |
177 | return sub; | |
178 | } | |
179 | ||
94524d8f VG |
180 | static void tls_decrypt_done(struct crypto_async_request *req, int err) |
181 | { | |
182 | struct aead_request *aead_req = (struct aead_request *)req; | |
94524d8f | 183 | struct scatterlist *sgout = aead_req->dst; |
692d7b5d | 184 | struct scatterlist *sgin = aead_req->src; |
7a3dd8c8 JF |
185 | struct tls_sw_context_rx *ctx; |
186 | struct tls_context *tls_ctx; | |
94524d8f VG |
187 | struct scatterlist *sg; |
188 | unsigned int pages; | |
6ececdc5 | 189 | struct sock *sk; |
7a3dd8c8 | 190 | |
6ececdc5 JK |
191 | sk = (struct sock *)req->data; |
192 | tls_ctx = tls_get_ctx(sk); | |
7a3dd8c8 | 193 | ctx = tls_sw_ctx_rx(tls_ctx); |
94524d8f VG |
194 | |
195 | /* Propagate if there was an err */ | |
196 | if (err) { | |
5c5ec668 | 197 | if (err == -EBADMSG) |
6ececdc5 | 198 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSDECRYPTERROR); |
94524d8f | 199 | ctx->async_wait.err = err; |
6ececdc5 | 200 | tls_err_abort(sk, err); |
94524d8f VG |
201 | } |
202 | ||
692d7b5d VG |
203 | /* Free the destination pages if skb was not decrypted inplace */ |
204 | if (sgout != sgin) { | |
205 | /* Skip the first S/G entry as it points to AAD */ | |
206 | for_each_sg(sg_next(sgout), sg, UINT_MAX, pages) { | |
207 | if (!sg) | |
208 | break; | |
209 | put_page(sg_page(sg)); | |
210 | } | |
94524d8f VG |
211 | } |
212 | ||
213 | kfree(aead_req); | |
214 | ||
0cada332 | 215 | spin_lock_bh(&ctx->decrypt_compl_lock); |
37943f04 | 216 | if (!atomic_dec_return(&ctx->decrypt_pending)) |
94524d8f | 217 | complete(&ctx->async_wait.completion); |
0cada332 | 218 | spin_unlock_bh(&ctx->decrypt_compl_lock); |
94524d8f VG |
219 | } |
220 | ||
c46234eb DW |
221 | static int tls_do_decryption(struct sock *sk, |
222 | struct scatterlist *sgin, | |
223 | struct scatterlist *sgout, | |
224 | char *iv_recv, | |
225 | size_t data_len, | |
94524d8f | 226 | struct aead_request *aead_req, |
3547a1f9 | 227 | struct tls_decrypt_arg *darg) |
c46234eb DW |
228 | { |
229 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 230 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 231 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 232 | int ret; |
c46234eb | 233 | |
0b243d00 | 234 | aead_request_set_tfm(aead_req, ctx->aead_recv); |
4509de14 | 235 | aead_request_set_ad(aead_req, prot->aad_size); |
c46234eb | 236 | aead_request_set_crypt(aead_req, sgin, sgout, |
4509de14 | 237 | data_len + prot->tag_size, |
c46234eb | 238 | (u8 *)iv_recv); |
c46234eb | 239 | |
3547a1f9 | 240 | if (darg->async) { |
94524d8f VG |
241 | aead_request_set_callback(aead_req, |
242 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
6ececdc5 | 243 | tls_decrypt_done, sk); |
94524d8f VG |
244 | atomic_inc(&ctx->decrypt_pending); |
245 | } else { | |
246 | aead_request_set_callback(aead_req, | |
247 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
248 | crypto_req_done, &ctx->async_wait); | |
249 | } | |
250 | ||
251 | ret = crypto_aead_decrypt(aead_req); | |
252 | if (ret == -EINPROGRESS) { | |
3547a1f9 JK |
253 | if (darg->async) |
254 | return 0; | |
94524d8f VG |
255 | |
256 | ret = crypto_wait_req(ret, &ctx->async_wait); | |
257 | } | |
3547a1f9 JK |
258 | darg->async = false; |
259 | ||
c46234eb DW |
260 | return ret; |
261 | } | |
262 | ||
d829e9c4 | 263 | static void tls_trim_both_msgs(struct sock *sk, int target_size) |
3c4d7559 DW |
264 | { |
265 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 266 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 267 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 268 | struct tls_rec *rec = ctx->open_rec; |
3c4d7559 | 269 | |
d829e9c4 | 270 | sk_msg_trim(sk, &rec->msg_plaintext, target_size); |
3c4d7559 | 271 | if (target_size > 0) |
4509de14 | 272 | target_size += prot->overhead_size; |
d829e9c4 | 273 | sk_msg_trim(sk, &rec->msg_encrypted, target_size); |
3c4d7559 DW |
274 | } |
275 | ||
d829e9c4 | 276 | static int tls_alloc_encrypted_msg(struct sock *sk, int len) |
3c4d7559 DW |
277 | { |
278 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 279 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 280 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 | 281 | struct sk_msg *msg_en = &rec->msg_encrypted; |
3c4d7559 | 282 | |
d829e9c4 | 283 | return sk_msg_alloc(sk, msg_en, len, 0); |
3c4d7559 DW |
284 | } |
285 | ||
d829e9c4 | 286 | static int tls_clone_plaintext_msg(struct sock *sk, int required) |
3c4d7559 DW |
287 | { |
288 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 289 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 290 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 291 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
292 | struct sk_msg *msg_pl = &rec->msg_plaintext; |
293 | struct sk_msg *msg_en = &rec->msg_encrypted; | |
4e6d4720 | 294 | int skip, len; |
3c4d7559 | 295 | |
d829e9c4 DB |
296 | /* We add page references worth len bytes from encrypted sg |
297 | * at the end of plaintext sg. It is guaranteed that msg_en | |
4e6d4720 VG |
298 | * has enough required room (ensured by caller). |
299 | */ | |
d829e9c4 | 300 | len = required - msg_pl->sg.size; |
52ea992c | 301 | |
d829e9c4 DB |
302 | /* Skip initial bytes in msg_en's data to be able to use |
303 | * same offset of both plain and encrypted data. | |
4e6d4720 | 304 | */ |
4509de14 | 305 | skip = prot->prepend_size + msg_pl->sg.size; |
4e6d4720 | 306 | |
d829e9c4 | 307 | return sk_msg_clone(sk, msg_pl, msg_en, skip, len); |
3c4d7559 DW |
308 | } |
309 | ||
d3b18ad3 | 310 | static struct tls_rec *tls_get_rec(struct sock *sk) |
3c4d7559 DW |
311 | { |
312 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 313 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 314 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
315 | struct sk_msg *msg_pl, *msg_en; |
316 | struct tls_rec *rec; | |
317 | int mem_size; | |
3c4d7559 | 318 | |
d3b18ad3 JF |
319 | mem_size = sizeof(struct tls_rec) + crypto_aead_reqsize(ctx->aead_send); |
320 | ||
321 | rec = kzalloc(mem_size, sk->sk_allocation); | |
a42055e8 | 322 | if (!rec) |
d3b18ad3 JF |
323 | return NULL; |
324 | ||
325 | msg_pl = &rec->msg_plaintext; | |
326 | msg_en = &rec->msg_encrypted; | |
327 | ||
328 | sk_msg_init(msg_pl); | |
329 | sk_msg_init(msg_en); | |
330 | ||
331 | sg_init_table(rec->sg_aead_in, 2); | |
4509de14 | 332 | sg_set_buf(&rec->sg_aead_in[0], rec->aad_space, prot->aad_size); |
d3b18ad3 JF |
333 | sg_unmark_end(&rec->sg_aead_in[1]); |
334 | ||
335 | sg_init_table(rec->sg_aead_out, 2); | |
4509de14 | 336 | sg_set_buf(&rec->sg_aead_out[0], rec->aad_space, prot->aad_size); |
d3b18ad3 JF |
337 | sg_unmark_end(&rec->sg_aead_out[1]); |
338 | ||
339 | return rec; | |
340 | } | |
a42055e8 | 341 | |
d3b18ad3 JF |
342 | static void tls_free_rec(struct sock *sk, struct tls_rec *rec) |
343 | { | |
d829e9c4 DB |
344 | sk_msg_free(sk, &rec->msg_encrypted); |
345 | sk_msg_free(sk, &rec->msg_plaintext); | |
c774973e | 346 | kfree(rec); |
a42055e8 VG |
347 | } |
348 | ||
d3b18ad3 JF |
349 | static void tls_free_open_rec(struct sock *sk) |
350 | { | |
351 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
352 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
353 | struct tls_rec *rec = ctx->open_rec; | |
354 | ||
355 | if (rec) { | |
356 | tls_free_rec(sk, rec); | |
357 | ctx->open_rec = NULL; | |
358 | } | |
359 | } | |
360 | ||
a42055e8 VG |
361 | int tls_tx_records(struct sock *sk, int flags) |
362 | { | |
363 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
364 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
365 | struct tls_rec *rec, *tmp; | |
d829e9c4 | 366 | struct sk_msg *msg_en; |
a42055e8 VG |
367 | int tx_flags, rc = 0; |
368 | ||
369 | if (tls_is_partially_sent_record(tls_ctx)) { | |
9932a29a | 370 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
371 | struct tls_rec, list); |
372 | ||
373 | if (flags == -1) | |
374 | tx_flags = rec->tx_flags; | |
375 | else | |
376 | tx_flags = flags; | |
377 | ||
378 | rc = tls_push_partial_record(sk, tls_ctx, tx_flags); | |
379 | if (rc) | |
380 | goto tx_err; | |
381 | ||
382 | /* Full record has been transmitted. | |
9932a29a | 383 | * Remove the head of tx_list |
a42055e8 | 384 | */ |
a42055e8 | 385 | list_del(&rec->list); |
d829e9c4 | 386 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
387 | kfree(rec); |
388 | } | |
389 | ||
9932a29a VG |
390 | /* Tx all ready records */ |
391 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { | |
392 | if (READ_ONCE(rec->tx_ready)) { | |
a42055e8 VG |
393 | if (flags == -1) |
394 | tx_flags = rec->tx_flags; | |
395 | else | |
396 | tx_flags = flags; | |
397 | ||
d829e9c4 | 398 | msg_en = &rec->msg_encrypted; |
a42055e8 | 399 | rc = tls_push_sg(sk, tls_ctx, |
d829e9c4 | 400 | &msg_en->sg.data[msg_en->sg.curr], |
a42055e8 VG |
401 | 0, tx_flags); |
402 | if (rc) | |
403 | goto tx_err; | |
404 | ||
a42055e8 | 405 | list_del(&rec->list); |
d829e9c4 | 406 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
407 | kfree(rec); |
408 | } else { | |
409 | break; | |
410 | } | |
411 | } | |
412 | ||
413 | tx_err: | |
414 | if (rc < 0 && rc != -EAGAIN) | |
da353fac | 415 | tls_err_abort(sk, -EBADMSG); |
a42055e8 VG |
416 | |
417 | return rc; | |
418 | } | |
419 | ||
420 | static void tls_encrypt_done(struct crypto_async_request *req, int err) | |
421 | { | |
422 | struct aead_request *aead_req = (struct aead_request *)req; | |
423 | struct sock *sk = req->data; | |
424 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 425 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 426 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d829e9c4 DB |
427 | struct scatterlist *sge; |
428 | struct sk_msg *msg_en; | |
a42055e8 VG |
429 | struct tls_rec *rec; |
430 | bool ready = false; | |
431 | int pending; | |
432 | ||
433 | rec = container_of(aead_req, struct tls_rec, aead_req); | |
d829e9c4 | 434 | msg_en = &rec->msg_encrypted; |
a42055e8 | 435 | |
d829e9c4 | 436 | sge = sk_msg_elem(msg_en, msg_en->sg.curr); |
4509de14 VG |
437 | sge->offset -= prot->prepend_size; |
438 | sge->length += prot->prepend_size; | |
a42055e8 | 439 | |
80ece6a0 | 440 | /* Check if error is previously set on socket */ |
a42055e8 | 441 | if (err || sk->sk_err) { |
a42055e8 VG |
442 | rec = NULL; |
443 | ||
444 | /* If err is already set on socket, return the same code */ | |
445 | if (sk->sk_err) { | |
1d9d6fd2 | 446 | ctx->async_wait.err = -sk->sk_err; |
a42055e8 VG |
447 | } else { |
448 | ctx->async_wait.err = err; | |
449 | tls_err_abort(sk, err); | |
450 | } | |
451 | } | |
452 | ||
9932a29a VG |
453 | if (rec) { |
454 | struct tls_rec *first_rec; | |
455 | ||
456 | /* Mark the record as ready for transmission */ | |
457 | smp_store_mb(rec->tx_ready, true); | |
458 | ||
459 | /* If received record is at head of tx_list, schedule tx */ | |
460 | first_rec = list_first_entry(&ctx->tx_list, | |
461 | struct tls_rec, list); | |
462 | if (rec == first_rec) | |
463 | ready = true; | |
464 | } | |
a42055e8 | 465 | |
0cada332 | 466 | spin_lock_bh(&ctx->encrypt_compl_lock); |
a42055e8 VG |
467 | pending = atomic_dec_return(&ctx->encrypt_pending); |
468 | ||
0cada332 | 469 | if (!pending && ctx->async_notify) |
a42055e8 | 470 | complete(&ctx->async_wait.completion); |
0cada332 | 471 | spin_unlock_bh(&ctx->encrypt_compl_lock); |
a42055e8 VG |
472 | |
473 | if (!ready) | |
474 | return; | |
475 | ||
476 | /* Schedule the transmission */ | |
477 | if (!test_and_set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
d829e9c4 | 478 | schedule_delayed_work(&ctx->tx_work.work, 1); |
3c4d7559 DW |
479 | } |
480 | ||
a42055e8 VG |
481 | static int tls_do_encryption(struct sock *sk, |
482 | struct tls_context *tls_ctx, | |
a447da7d DB |
483 | struct tls_sw_context_tx *ctx, |
484 | struct aead_request *aead_req, | |
d829e9c4 | 485 | size_t data_len, u32 start) |
3c4d7559 | 486 | { |
4509de14 | 487 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 488 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
489 | struct sk_msg *msg_en = &rec->msg_encrypted; |
490 | struct scatterlist *sge = sk_msg_elem(msg_en, start); | |
f295b3ae VG |
491 | int rc, iv_offset = 0; |
492 | ||
493 | /* For CCM based ciphers, first byte of IV is a constant */ | |
128cfb88 TZ |
494 | switch (prot->cipher_type) { |
495 | case TLS_CIPHER_AES_CCM_128: | |
f295b3ae VG |
496 | rec->iv_data[0] = TLS_AES_CCM_IV_B0_BYTE; |
497 | iv_offset = 1; | |
128cfb88 TZ |
498 | break; |
499 | case TLS_CIPHER_SM4_CCM: | |
500 | rec->iv_data[0] = TLS_SM4_CCM_IV_B0_BYTE; | |
501 | iv_offset = 1; | |
502 | break; | |
f295b3ae VG |
503 | } |
504 | ||
505 | memcpy(&rec->iv_data[iv_offset], tls_ctx->tx.iv, | |
506 | prot->iv_size + prot->salt_size); | |
3c4d7559 | 507 | |
58790314 JK |
508 | tls_xor_iv_with_seq(prot, rec->iv_data + iv_offset, |
509 | 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) { |
da353fac | 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; |
a351d608 | 795 | bool enospc, policy, redir_ingress; |
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: | |
a351d608 | 840 | redir_ingress = psock->redir_ingress; |
d3b18ad3 JF |
841 | sk_redir = psock->sk_redir; |
842 | memcpy(&msg_redir, msg, sizeof(*msg)); | |
843 | if (msg->apply_bytes < send) | |
844 | msg->apply_bytes = 0; | |
845 | else | |
846 | msg->apply_bytes -= send; | |
847 | sk_msg_return_zero(sk, msg, send); | |
848 | msg->sg.size -= send; | |
849 | release_sock(sk); | |
a351d608 PY |
850 | err = tcp_bpf_sendmsg_redir(sk_redir, redir_ingress, |
851 | &msg_redir, send, flags); | |
d3b18ad3 JF |
852 | lock_sock(sk); |
853 | if (err < 0) { | |
854 | *copied -= sk_msg_free_nocharge(sk, &msg_redir); | |
855 | msg->sg.size = 0; | |
856 | } | |
857 | if (msg->sg.size == 0) | |
858 | tls_free_open_rec(sk); | |
859 | break; | |
860 | case __SK_DROP: | |
861 | default: | |
862 | sk_msg_free_partial(sk, msg, send); | |
863 | if (msg->apply_bytes < send) | |
864 | msg->apply_bytes = 0; | |
865 | else | |
866 | msg->apply_bytes -= send; | |
867 | if (msg->sg.size == 0) | |
868 | tls_free_open_rec(sk); | |
7246d8ed | 869 | *copied -= (send + delta); |
d3b18ad3 JF |
870 | err = -EACCES; |
871 | } | |
a42055e8 | 872 | |
d3b18ad3 JF |
873 | if (likely(!err)) { |
874 | bool reset_eval = !ctx->open_rec; | |
a42055e8 | 875 | |
d3b18ad3 JF |
876 | rec = ctx->open_rec; |
877 | if (rec) { | |
878 | msg = &rec->msg_plaintext; | |
879 | if (!msg->apply_bytes) | |
880 | reset_eval = true; | |
881 | } | |
882 | if (reset_eval) { | |
883 | psock->eval = __SK_NONE; | |
884 | if (psock->sk_redir) { | |
885 | sock_put(psock->sk_redir); | |
886 | psock->sk_redir = NULL; | |
887 | } | |
888 | } | |
889 | if (rec) | |
890 | goto more_data; | |
891 | } | |
892 | out_err: | |
893 | sk_psock_put(sk, psock); | |
894 | return err; | |
895 | } | |
896 | ||
897 | static int tls_sw_push_pending_record(struct sock *sk, int flags) | |
898 | { | |
899 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
900 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
901 | struct tls_rec *rec = ctx->open_rec; | |
902 | struct sk_msg *msg_pl; | |
903 | size_t copied; | |
a42055e8 | 904 | |
a42055e8 | 905 | if (!rec) |
d3b18ad3 | 906 | return 0; |
a42055e8 | 907 | |
d829e9c4 | 908 | msg_pl = &rec->msg_plaintext; |
d3b18ad3 JF |
909 | copied = msg_pl->sg.size; |
910 | if (!copied) | |
911 | return 0; | |
a42055e8 | 912 | |
d3b18ad3 JF |
913 | return bpf_exec_tx_verdict(msg_pl, sk, true, TLS_RECORD_TYPE_DATA, |
914 | &copied, flags); | |
a42055e8 VG |
915 | } |
916 | ||
917 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) | |
918 | { | |
3c4d7559 | 919 | long timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
a42055e8 | 920 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
4509de14 | 921 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 922 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
5b053e12 | 923 | bool async_capable = ctx->async_capable; |
a42055e8 | 924 | unsigned char record_type = TLS_RECORD_TYPE_DATA; |
00e23707 | 925 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
3c4d7559 | 926 | bool eor = !(msg->msg_flags & MSG_MORE); |
a7bff11f VF |
927 | size_t try_to_copy; |
928 | ssize_t copied = 0; | |
d829e9c4 | 929 | struct sk_msg *msg_pl, *msg_en; |
a42055e8 VG |
930 | struct tls_rec *rec; |
931 | int required_size; | |
932 | int num_async = 0; | |
3c4d7559 | 933 | bool full_record; |
a42055e8 VG |
934 | int record_room; |
935 | int num_zc = 0; | |
3c4d7559 | 936 | int orig_size; |
4128c0cf | 937 | int ret = 0; |
0cada332 | 938 | int pending; |
3c4d7559 | 939 | |
1c3b63f1 RC |
940 | if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | |
941 | MSG_CMSG_COMPAT)) | |
4a5cdc60 | 942 | return -EOPNOTSUPP; |
3c4d7559 | 943 | |
79ffe608 | 944 | mutex_lock(&tls_ctx->tx_lock); |
3c4d7559 DW |
945 | lock_sock(sk); |
946 | ||
3c4d7559 | 947 | if (unlikely(msg->msg_controllen)) { |
58790314 | 948 | ret = tls_process_cmsg(sk, msg, &record_type); |
a42055e8 VG |
949 | if (ret) { |
950 | if (ret == -EINPROGRESS) | |
951 | num_async++; | |
952 | else if (ret != -EAGAIN) | |
953 | goto send_end; | |
954 | } | |
3c4d7559 DW |
955 | } |
956 | ||
957 | while (msg_data_left(msg)) { | |
958 | if (sk->sk_err) { | |
30be8f8d | 959 | ret = -sk->sk_err; |
3c4d7559 DW |
960 | goto send_end; |
961 | } | |
962 | ||
d3b18ad3 JF |
963 | if (ctx->open_rec) |
964 | rec = ctx->open_rec; | |
965 | else | |
966 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
967 | if (!rec) { |
968 | ret = -ENOMEM; | |
969 | goto send_end; | |
970 | } | |
971 | ||
d829e9c4 DB |
972 | msg_pl = &rec->msg_plaintext; |
973 | msg_en = &rec->msg_encrypted; | |
974 | ||
975 | orig_size = msg_pl->sg.size; | |
3c4d7559 DW |
976 | full_record = false; |
977 | try_to_copy = msg_data_left(msg); | |
d829e9c4 | 978 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
3c4d7559 DW |
979 | if (try_to_copy >= record_room) { |
980 | try_to_copy = record_room; | |
981 | full_record = true; | |
982 | } | |
983 | ||
d829e9c4 | 984 | required_size = msg_pl->sg.size + try_to_copy + |
4509de14 | 985 | prot->overhead_size; |
3c4d7559 DW |
986 | |
987 | if (!sk_stream_memory_free(sk)) | |
988 | goto wait_for_sndbuf; | |
a42055e8 | 989 | |
3c4d7559 | 990 | alloc_encrypted: |
d829e9c4 | 991 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
992 | if (ret) { |
993 | if (ret != -ENOSPC) | |
994 | goto wait_for_memory; | |
995 | ||
996 | /* Adjust try_to_copy according to the amount that was | |
997 | * actually allocated. The difference is due | |
998 | * to max sg elements limit | |
999 | */ | |
d829e9c4 | 1000 | try_to_copy -= required_size - msg_en->sg.size; |
3c4d7559 DW |
1001 | full_record = true; |
1002 | } | |
a42055e8 VG |
1003 | |
1004 | if (!is_kvec && (full_record || eor) && !async_capable) { | |
d3b18ad3 JF |
1005 | u32 first = msg_pl->sg.end; |
1006 | ||
d829e9c4 DB |
1007 | ret = sk_msg_zerocopy_from_iter(sk, &msg->msg_iter, |
1008 | msg_pl, try_to_copy); | |
3c4d7559 DW |
1009 | if (ret) |
1010 | goto fallback_to_reg_send; | |
1011 | ||
a42055e8 | 1012 | num_zc++; |
3c4d7559 | 1013 | copied += try_to_copy; |
d3b18ad3 JF |
1014 | |
1015 | sk_msg_sg_copy_set(msg_pl, first); | |
1016 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, | |
1017 | record_type, &copied, | |
1018 | msg->msg_flags); | |
a42055e8 VG |
1019 | if (ret) { |
1020 | if (ret == -EINPROGRESS) | |
1021 | num_async++; | |
d3b18ad3 JF |
1022 | else if (ret == -ENOMEM) |
1023 | goto wait_for_memory; | |
c329ef96 | 1024 | else if (ctx->open_rec && ret == -ENOSPC) |
d3b18ad3 | 1025 | goto rollback_iter; |
a42055e8 VG |
1026 | else if (ret != -EAGAIN) |
1027 | goto send_end; | |
1028 | } | |
5a3611ef | 1029 | continue; |
d3b18ad3 JF |
1030 | rollback_iter: |
1031 | copied -= try_to_copy; | |
1032 | sk_msg_sg_copy_clear(msg_pl, first); | |
1033 | iov_iter_revert(&msg->msg_iter, | |
1034 | msg_pl->sg.size - orig_size); | |
3c4d7559 | 1035 | fallback_to_reg_send: |
d829e9c4 | 1036 | sk_msg_trim(sk, msg_pl, orig_size); |
3c4d7559 DW |
1037 | } |
1038 | ||
d829e9c4 | 1039 | required_size = msg_pl->sg.size + try_to_copy; |
4e6d4720 | 1040 | |
d829e9c4 | 1041 | ret = tls_clone_plaintext_msg(sk, required_size); |
3c4d7559 DW |
1042 | if (ret) { |
1043 | if (ret != -ENOSPC) | |
4e6d4720 | 1044 | goto send_end; |
3c4d7559 DW |
1045 | |
1046 | /* Adjust try_to_copy according to the amount that was | |
1047 | * actually allocated. The difference is due | |
1048 | * to max sg elements limit | |
1049 | */ | |
d829e9c4 | 1050 | try_to_copy -= required_size - msg_pl->sg.size; |
3c4d7559 | 1051 | full_record = true; |
4509de14 VG |
1052 | sk_msg_trim(sk, msg_en, |
1053 | msg_pl->sg.size + prot->overhead_size); | |
3c4d7559 DW |
1054 | } |
1055 | ||
65a10e28 VG |
1056 | if (try_to_copy) { |
1057 | ret = sk_msg_memcopy_from_iter(sk, &msg->msg_iter, | |
1058 | msg_pl, try_to_copy); | |
1059 | if (ret < 0) | |
1060 | goto trim_sgl; | |
1061 | } | |
3c4d7559 | 1062 | |
d829e9c4 DB |
1063 | /* Open records defined only if successfully copied, otherwise |
1064 | * we would trim the sg but not reset the open record frags. | |
1065 | */ | |
1066 | tls_ctx->pending_open_record_frags = true; | |
3c4d7559 DW |
1067 | copied += try_to_copy; |
1068 | if (full_record || eor) { | |
d3b18ad3 JF |
1069 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
1070 | record_type, &copied, | |
1071 | msg->msg_flags); | |
3c4d7559 | 1072 | if (ret) { |
a42055e8 VG |
1073 | if (ret == -EINPROGRESS) |
1074 | num_async++; | |
d3b18ad3 JF |
1075 | else if (ret == -ENOMEM) |
1076 | goto wait_for_memory; | |
1077 | else if (ret != -EAGAIN) { | |
1078 | if (ret == -ENOSPC) | |
1079 | ret = 0; | |
a42055e8 | 1080 | goto send_end; |
d3b18ad3 | 1081 | } |
3c4d7559 DW |
1082 | } |
1083 | } | |
1084 | ||
1085 | continue; | |
1086 | ||
1087 | wait_for_sndbuf: | |
1088 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
1089 | wait_for_memory: | |
1090 | ret = sk_stream_wait_memory(sk, &timeo); | |
1091 | if (ret) { | |
1092 | trim_sgl: | |
c329ef96 JK |
1093 | if (ctx->open_rec) |
1094 | tls_trim_both_msgs(sk, orig_size); | |
3c4d7559 DW |
1095 | goto send_end; |
1096 | } | |
1097 | ||
c329ef96 | 1098 | if (ctx->open_rec && msg_en->sg.size < required_size) |
3c4d7559 | 1099 | goto alloc_encrypted; |
3c4d7559 DW |
1100 | } |
1101 | ||
a42055e8 VG |
1102 | if (!num_async) { |
1103 | goto send_end; | |
1104 | } else if (num_zc) { | |
1105 | /* Wait for pending encryptions to get completed */ | |
0cada332 VKY |
1106 | spin_lock_bh(&ctx->encrypt_compl_lock); |
1107 | ctx->async_notify = true; | |
a42055e8 | 1108 | |
0cada332 VKY |
1109 | pending = atomic_read(&ctx->encrypt_pending); |
1110 | spin_unlock_bh(&ctx->encrypt_compl_lock); | |
1111 | if (pending) | |
a42055e8 VG |
1112 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
1113 | else | |
1114 | reinit_completion(&ctx->async_wait.completion); | |
1115 | ||
0cada332 VKY |
1116 | /* There can be no concurrent accesses, since we have no |
1117 | * pending encrypt operations | |
1118 | */ | |
a42055e8 VG |
1119 | WRITE_ONCE(ctx->async_notify, false); |
1120 | ||
1121 | if (ctx->async_wait.err) { | |
1122 | ret = ctx->async_wait.err; | |
1123 | copied = 0; | |
1124 | } | |
1125 | } | |
1126 | ||
1127 | /* Transmit if any encryptions have completed */ | |
1128 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1129 | cancel_delayed_work(&ctx->tx_work.work); | |
1130 | tls_tx_records(sk, msg->msg_flags); | |
1131 | } | |
1132 | ||
3c4d7559 DW |
1133 | send_end: |
1134 | ret = sk_stream_error(sk, msg->msg_flags, ret); | |
1135 | ||
1136 | release_sock(sk); | |
79ffe608 | 1137 | mutex_unlock(&tls_ctx->tx_lock); |
a7bff11f | 1138 | return copied > 0 ? copied : ret; |
3c4d7559 DW |
1139 | } |
1140 | ||
01cb8a1a Y |
1141 | static int tls_sw_do_sendpage(struct sock *sk, struct page *page, |
1142 | int offset, size_t size, int flags) | |
3c4d7559 | 1143 | { |
a42055e8 | 1144 | long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
3c4d7559 | 1145 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 1146 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
4509de14 | 1147 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
3c4d7559 | 1148 | unsigned char record_type = TLS_RECORD_TYPE_DATA; |
d829e9c4 | 1149 | struct sk_msg *msg_pl; |
a42055e8 VG |
1150 | struct tls_rec *rec; |
1151 | int num_async = 0; | |
a7bff11f | 1152 | ssize_t copied = 0; |
3c4d7559 DW |
1153 | bool full_record; |
1154 | int record_room; | |
4128c0cf | 1155 | int ret = 0; |
a42055e8 | 1156 | bool eor; |
3c4d7559 | 1157 | |
d452d48b | 1158 | eor = !(flags & MSG_SENDPAGE_NOTLAST); |
3c4d7559 DW |
1159 | sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1160 | ||
3c4d7559 DW |
1161 | /* Call the sk_stream functions to manage the sndbuf mem. */ |
1162 | while (size > 0) { | |
1163 | size_t copy, required_size; | |
1164 | ||
1165 | if (sk->sk_err) { | |
30be8f8d | 1166 | ret = -sk->sk_err; |
3c4d7559 DW |
1167 | goto sendpage_end; |
1168 | } | |
1169 | ||
d3b18ad3 JF |
1170 | if (ctx->open_rec) |
1171 | rec = ctx->open_rec; | |
1172 | else | |
1173 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
1174 | if (!rec) { |
1175 | ret = -ENOMEM; | |
1176 | goto sendpage_end; | |
1177 | } | |
1178 | ||
d829e9c4 DB |
1179 | msg_pl = &rec->msg_plaintext; |
1180 | ||
3c4d7559 | 1181 | full_record = false; |
d829e9c4 | 1182 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
3c4d7559 DW |
1183 | copy = size; |
1184 | if (copy >= record_room) { | |
1185 | copy = record_room; | |
1186 | full_record = true; | |
1187 | } | |
d829e9c4 | 1188 | |
4509de14 | 1189 | required_size = msg_pl->sg.size + copy + prot->overhead_size; |
3c4d7559 DW |
1190 | |
1191 | if (!sk_stream_memory_free(sk)) | |
1192 | goto wait_for_sndbuf; | |
1193 | alloc_payload: | |
d829e9c4 | 1194 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
1195 | if (ret) { |
1196 | if (ret != -ENOSPC) | |
1197 | goto wait_for_memory; | |
1198 | ||
1199 | /* Adjust copy according to the amount that was | |
1200 | * actually allocated. The difference is due | |
1201 | * to max sg elements limit | |
1202 | */ | |
d829e9c4 | 1203 | copy -= required_size - msg_pl->sg.size; |
3c4d7559 DW |
1204 | full_record = true; |
1205 | } | |
1206 | ||
d829e9c4 | 1207 | sk_msg_page_add(msg_pl, page, copy, offset); |
3c4d7559 | 1208 | sk_mem_charge(sk, copy); |
d829e9c4 | 1209 | |
3c4d7559 DW |
1210 | offset += copy; |
1211 | size -= copy; | |
d3b18ad3 | 1212 | copied += copy; |
3c4d7559 | 1213 | |
d829e9c4 DB |
1214 | tls_ctx->pending_open_record_frags = true; |
1215 | if (full_record || eor || sk_msg_full(msg_pl)) { | |
d3b18ad3 JF |
1216 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
1217 | record_type, &copied, flags); | |
3c4d7559 | 1218 | if (ret) { |
a42055e8 VG |
1219 | if (ret == -EINPROGRESS) |
1220 | num_async++; | |
d3b18ad3 JF |
1221 | else if (ret == -ENOMEM) |
1222 | goto wait_for_memory; | |
1223 | else if (ret != -EAGAIN) { | |
1224 | if (ret == -ENOSPC) | |
1225 | ret = 0; | |
a42055e8 | 1226 | goto sendpage_end; |
d3b18ad3 | 1227 | } |
3c4d7559 DW |
1228 | } |
1229 | } | |
1230 | continue; | |
1231 | wait_for_sndbuf: | |
1232 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
1233 | wait_for_memory: | |
1234 | ret = sk_stream_wait_memory(sk, &timeo); | |
1235 | if (ret) { | |
c329ef96 JK |
1236 | if (ctx->open_rec) |
1237 | tls_trim_both_msgs(sk, msg_pl->sg.size); | |
3c4d7559 DW |
1238 | goto sendpage_end; |
1239 | } | |
1240 | ||
c329ef96 JK |
1241 | if (ctx->open_rec) |
1242 | goto alloc_payload; | |
3c4d7559 DW |
1243 | } |
1244 | ||
a42055e8 VG |
1245 | if (num_async) { |
1246 | /* Transmit if any encryptions have completed */ | |
1247 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1248 | cancel_delayed_work(&ctx->tx_work.work); | |
1249 | tls_tx_records(sk, flags); | |
1250 | } | |
1251 | } | |
3c4d7559 | 1252 | sendpage_end: |
d3b18ad3 | 1253 | ret = sk_stream_error(sk, flags, ret); |
a7bff11f | 1254 | return copied > 0 ? copied : ret; |
3c4d7559 DW |
1255 | } |
1256 | ||
d4ffb02d WB |
1257 | int tls_sw_sendpage_locked(struct sock *sk, struct page *page, |
1258 | int offset, size_t size, int flags) | |
1259 | { | |
1260 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1261 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY | | |
1262 | MSG_NO_SHARED_FRAGS)) | |
4a5cdc60 | 1263 | return -EOPNOTSUPP; |
d4ffb02d WB |
1264 | |
1265 | return tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1266 | } | |
1267 | ||
0608c69c JF |
1268 | int tls_sw_sendpage(struct sock *sk, struct page *page, |
1269 | int offset, size_t size, int flags) | |
1270 | { | |
79ffe608 | 1271 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
0608c69c JF |
1272 | int ret; |
1273 | ||
1274 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1275 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY)) | |
4a5cdc60 | 1276 | return -EOPNOTSUPP; |
0608c69c | 1277 | |
79ffe608 | 1278 | mutex_lock(&tls_ctx->tx_lock); |
0608c69c JF |
1279 | lock_sock(sk); |
1280 | ret = tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1281 | release_sock(sk); | |
79ffe608 | 1282 | mutex_unlock(&tls_ctx->tx_lock); |
0608c69c JF |
1283 | return ret; |
1284 | } | |
1285 | ||
35560b7f JK |
1286 | static int |
1287 | tls_rx_rec_wait(struct sock *sk, struct sk_psock *psock, bool nonblock, | |
70f03fc2 | 1288 | bool released) |
c46234eb DW |
1289 | { |
1290 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1291 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 1292 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
70f03fc2 JK |
1293 | long timeo; |
1294 | ||
1295 | timeo = sock_rcvtimeo(sk, nonblock); | |
c46234eb | 1296 | |
b92a13d4 | 1297 | while (!tls_strp_msg_ready(ctx)) { |
35560b7f JK |
1298 | if (!sk_psock_queue_empty(psock)) |
1299 | return 0; | |
1300 | ||
1301 | if (sk->sk_err) | |
1302 | return sock_error(sk); | |
c46234eb | 1303 | |
20ffc7ad | 1304 | if (!skb_queue_empty(&sk->sk_receive_queue)) { |
84c61fe1 | 1305 | tls_strp_check_rcv(&ctx->strp); |
b92a13d4 | 1306 | if (tls_strp_msg_ready(ctx)) |
35560b7f | 1307 | break; |
20ffc7ad VF |
1308 | } |
1309 | ||
fcf4793e | 1310 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
35560b7f | 1311 | return 0; |
fcf4793e | 1312 | |
c46234eb | 1313 | if (sock_flag(sk, SOCK_DONE)) |
35560b7f | 1314 | return 0; |
c46234eb | 1315 | |
70f03fc2 | 1316 | if (!timeo) |
35560b7f | 1317 | return -EAGAIN; |
c46234eb | 1318 | |
84c61fe1 | 1319 | released = true; |
c46234eb DW |
1320 | add_wait_queue(sk_sleep(sk), &wait); |
1321 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); | |
d3b18ad3 | 1322 | sk_wait_event(sk, &timeo, |
b92a13d4 JK |
1323 | tls_strp_msg_ready(ctx) || |
1324 | !sk_psock_queue_empty(psock), | |
d3b18ad3 | 1325 | &wait); |
c46234eb DW |
1326 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
1327 | remove_wait_queue(sk_sleep(sk), &wait); | |
1328 | ||
1329 | /* Handle signals */ | |
35560b7f JK |
1330 | if (signal_pending(current)) |
1331 | return sock_intr_errno(timeo); | |
c46234eb DW |
1332 | } |
1333 | ||
84c61fe1 JK |
1334 | tls_strp_msg_load(&ctx->strp, released); |
1335 | ||
35560b7f | 1336 | return 1; |
c46234eb DW |
1337 | } |
1338 | ||
d4bd88e6 | 1339 | static int tls_setup_from_iter(struct iov_iter *from, |
d829e9c4 | 1340 | int length, int *pages_used, |
d829e9c4 DB |
1341 | struct scatterlist *to, |
1342 | int to_max_pages) | |
1343 | { | |
1344 | int rc = 0, i = 0, num_elem = *pages_used, maxpages; | |
1345 | struct page *pages[MAX_SKB_FRAGS]; | |
d4bd88e6 | 1346 | unsigned int size = 0; |
d829e9c4 DB |
1347 | ssize_t copied, use; |
1348 | size_t offset; | |
1349 | ||
1350 | while (length > 0) { | |
1351 | i = 0; | |
1352 | maxpages = to_max_pages - num_elem; | |
1353 | if (maxpages == 0) { | |
1354 | rc = -EFAULT; | |
1355 | goto out; | |
1356 | } | |
1ef255e2 | 1357 | copied = iov_iter_get_pages2(from, pages, |
d829e9c4 DB |
1358 | length, |
1359 | maxpages, &offset); | |
1360 | if (copied <= 0) { | |
1361 | rc = -EFAULT; | |
1362 | goto out; | |
1363 | } | |
1364 | ||
d829e9c4 DB |
1365 | length -= copied; |
1366 | size += copied; | |
1367 | while (copied) { | |
1368 | use = min_t(int, copied, PAGE_SIZE - offset); | |
1369 | ||
1370 | sg_set_page(&to[num_elem], | |
1371 | pages[i], use, offset); | |
1372 | sg_unmark_end(&to[num_elem]); | |
1373 | /* We do not uncharge memory from this API */ | |
1374 | ||
1375 | offset = 0; | |
1376 | copied -= use; | |
1377 | ||
1378 | i++; | |
1379 | num_elem++; | |
1380 | } | |
1381 | } | |
1382 | /* Mark the end in the last sg entry if newly added */ | |
1383 | if (num_elem > *pages_used) | |
1384 | sg_mark_end(&to[num_elem - 1]); | |
1385 | out: | |
1386 | if (rc) | |
d4bd88e6 | 1387 | iov_iter_revert(from, size); |
d829e9c4 DB |
1388 | *pages_used = num_elem; |
1389 | ||
1390 | return rc; | |
1391 | } | |
1392 | ||
fd31f399 JK |
1393 | static struct sk_buff * |
1394 | tls_alloc_clrtxt_skb(struct sock *sk, struct sk_buff *skb, | |
1395 | unsigned int full_len) | |
1396 | { | |
1397 | struct strp_msg *clr_rxm; | |
1398 | struct sk_buff *clr_skb; | |
1399 | int err; | |
1400 | ||
1401 | clr_skb = alloc_skb_with_frags(0, full_len, TLS_PAGE_ORDER, | |
1402 | &err, sk->sk_allocation); | |
1403 | if (!clr_skb) | |
1404 | return NULL; | |
1405 | ||
1406 | skb_copy_header(clr_skb, skb); | |
1407 | clr_skb->len = full_len; | |
1408 | clr_skb->data_len = full_len; | |
1409 | ||
1410 | clr_rxm = strp_msg(clr_skb); | |
1411 | clr_rxm->offset = 0; | |
1412 | ||
1413 | return clr_skb; | |
1414 | } | |
1415 | ||
8a958732 JK |
1416 | /* Decrypt handlers |
1417 | * | |
dd47ed36 | 1418 | * tls_decrypt_sw() and tls_decrypt_device() are decrypt handlers. |
8a958732 JK |
1419 | * They must transform the darg in/out argument are as follows: |
1420 | * | Input | Output | |
1421 | * ------------------------------------------------------------------- | |
1422 | * zc | Zero-copy decrypt allowed | Zero-copy performed | |
1423 | * async | Async decrypt allowed | Async crypto used / in progress | |
6bd116c8 | 1424 | * skb | * | Output skb |
b93f5700 JK |
1425 | * |
1426 | * If ZC decryption was performed darg.skb will point to the input skb. | |
8a958732 JK |
1427 | */ |
1428 | ||
0b243d00 | 1429 | /* This function decrypts the input skb into either out_iov or in out_sg |
8a958732 | 1430 | * or in skb buffers itself. The input parameter 'darg->zc' indicates if |
0b243d00 VG |
1431 | * zero-copy mode needs to be tried or not. With zero-copy mode, either |
1432 | * out_iov or out_sg must be non-NULL. In case both out_iov and out_sg are | |
1433 | * NULL, then the decryption happens inside skb buffers itself, i.e. | |
8a958732 | 1434 | * zero-copy gets disabled and 'darg->zc' is updated. |
0b243d00 | 1435 | */ |
541cc48b | 1436 | static int tls_decrypt_sg(struct sock *sk, struct iov_iter *out_iov, |
8a958732 JK |
1437 | struct scatterlist *out_sg, |
1438 | struct tls_decrypt_arg *darg) | |
0b243d00 VG |
1439 | { |
1440 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1441 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
4509de14 | 1442 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
b89fec54 | 1443 | int n_sgin, n_sgout, aead_size, err, pages = 0; |
541cc48b | 1444 | struct sk_buff *skb = tls_strp_msg(ctx); |
fd31f399 JK |
1445 | const struct strp_msg *rxm = strp_msg(skb); |
1446 | const struct tls_msg *tlm = tls_msg(skb); | |
0b243d00 | 1447 | struct aead_request *aead_req; |
0b243d00 VG |
1448 | struct scatterlist *sgin = NULL; |
1449 | struct scatterlist *sgout = NULL; | |
603380f5 | 1450 | const int data_len = rxm->full_len - prot->overhead_size; |
ce61327c | 1451 | int tail_pages = !!prot->tail_size; |
b89fec54 | 1452 | struct tls_decrypt_ctx *dctx; |
fd31f399 | 1453 | struct sk_buff *clear_skb; |
f295b3ae | 1454 | int iv_offset = 0; |
b89fec54 | 1455 | u8 *mem; |
0b243d00 | 1456 | |
fd31f399 JK |
1457 | n_sgin = skb_nsg(skb, rxm->offset + prot->prepend_size, |
1458 | rxm->full_len - prot->prepend_size); | |
1459 | if (n_sgin < 1) | |
1460 | return n_sgin ?: -EBADMSG; | |
1461 | ||
4175eac3 | 1462 | if (darg->zc && (out_iov || out_sg)) { |
fd31f399 JK |
1463 | clear_skb = NULL; |
1464 | ||
0b243d00 | 1465 | if (out_iov) |
ce61327c | 1466 | n_sgout = 1 + tail_pages + |
b93235e6 | 1467 | iov_iter_npages_cap(out_iov, INT_MAX, data_len); |
0b243d00 VG |
1468 | else |
1469 | n_sgout = sg_nents(out_sg); | |
1470 | } else { | |
4175eac3 | 1471 | darg->zc = false; |
0b243d00 | 1472 | |
fd31f399 JK |
1473 | clear_skb = tls_alloc_clrtxt_skb(sk, skb, rxm->full_len); |
1474 | if (!clear_skb) | |
1475 | return -ENOMEM; | |
1476 | ||
1477 | n_sgout = 1 + skb_shinfo(clear_skb)->nr_frags; | |
1478 | } | |
0b243d00 VG |
1479 | |
1480 | /* Increment to accommodate AAD */ | |
1481 | n_sgin = n_sgin + 1; | |
1482 | ||
0b243d00 | 1483 | /* Allocate a single block of memory which contains |
b89fec54 JK |
1484 | * aead_req || tls_decrypt_ctx. |
1485 | * Both structs are variable length. | |
0b243d00 | 1486 | */ |
b89fec54 JK |
1487 | aead_size = sizeof(*aead_req) + crypto_aead_reqsize(ctx->aead_recv); |
1488 | mem = kmalloc(aead_size + struct_size(dctx, sg, n_sgin + n_sgout), | |
1489 | sk->sk_allocation); | |
fd31f399 JK |
1490 | if (!mem) { |
1491 | err = -ENOMEM; | |
1492 | goto exit_free_skb; | |
1493 | } | |
0b243d00 VG |
1494 | |
1495 | /* Segment the allocated memory */ | |
1496 | aead_req = (struct aead_request *)mem; | |
b89fec54 JK |
1497 | dctx = (struct tls_decrypt_ctx *)(mem + aead_size); |
1498 | sgin = &dctx->sg[0]; | |
1499 | sgout = &dctx->sg[n_sgin]; | |
0b243d00 | 1500 | |
128cfb88 TZ |
1501 | /* For CCM based ciphers, first byte of nonce+iv is a constant */ |
1502 | switch (prot->cipher_type) { | |
1503 | case TLS_CIPHER_AES_CCM_128: | |
b89fec54 | 1504 | dctx->iv[0] = TLS_AES_CCM_IV_B0_BYTE; |
f295b3ae | 1505 | iv_offset = 1; |
128cfb88 TZ |
1506 | break; |
1507 | case TLS_CIPHER_SM4_CCM: | |
b89fec54 | 1508 | dctx->iv[0] = TLS_SM4_CCM_IV_B0_BYTE; |
128cfb88 TZ |
1509 | iv_offset = 1; |
1510 | break; | |
f295b3ae VG |
1511 | } |
1512 | ||
0b243d00 | 1513 | /* Prepare IV */ |
a6acbe62 | 1514 | if (prot->version == TLS_1_3_VERSION || |
a4ae58cd | 1515 | prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) { |
b89fec54 | 1516 | memcpy(&dctx->iv[iv_offset], tls_ctx->rx.iv, |
9381fe8c | 1517 | prot->iv_size + prot->salt_size); |
a4ae58cd JK |
1518 | } else { |
1519 | err = skb_copy_bits(skb, rxm->offset + TLS_HEADER_SIZE, | |
b89fec54 | 1520 | &dctx->iv[iv_offset] + prot->salt_size, |
a4ae58cd | 1521 | prot->iv_size); |
03957d84 JK |
1522 | if (err < 0) |
1523 | goto exit_free; | |
b89fec54 | 1524 | memcpy(&dctx->iv[iv_offset], tls_ctx->rx.iv, prot->salt_size); |
a4ae58cd | 1525 | } |
58790314 | 1526 | tls_xor_iv_with_seq(prot, &dctx->iv[iv_offset], tls_ctx->rx.rec_seq); |
0b243d00 VG |
1527 | |
1528 | /* Prepare AAD */ | |
b89fec54 | 1529 | tls_make_aad(dctx->aad, rxm->full_len - prot->overhead_size + |
4509de14 | 1530 | prot->tail_size, |
c3f6bb74 | 1531 | tls_ctx->rx.rec_seq, tlm->control, prot); |
0b243d00 VG |
1532 | |
1533 | /* Prepare sgin */ | |
1534 | sg_init_table(sgin, n_sgin); | |
b89fec54 | 1535 | sg_set_buf(&sgin[0], dctx->aad, prot->aad_size); |
0b243d00 | 1536 | err = skb_to_sgvec(skb, &sgin[1], |
4509de14 VG |
1537 | rxm->offset + prot->prepend_size, |
1538 | rxm->full_len - prot->prepend_size); | |
03957d84 JK |
1539 | if (err < 0) |
1540 | goto exit_free; | |
0b243d00 | 1541 | |
fd31f399 JK |
1542 | if (clear_skb) { |
1543 | sg_init_table(sgout, n_sgout); | |
1544 | sg_set_buf(&sgout[0], dctx->aad, prot->aad_size); | |
1545 | ||
1546 | err = skb_to_sgvec(clear_skb, &sgout[1], prot->prepend_size, | |
1547 | data_len + prot->tail_size); | |
1548 | if (err < 0) | |
1549 | goto exit_free; | |
1550 | } else if (out_iov) { | |
1551 | sg_init_table(sgout, n_sgout); | |
1552 | sg_set_buf(&sgout[0], dctx->aad, prot->aad_size); | |
1553 | ||
1554 | err = tls_setup_from_iter(out_iov, data_len, &pages, &sgout[1], | |
1555 | (n_sgout - 1 - tail_pages)); | |
1556 | if (err < 0) | |
1557 | goto exit_free_pages; | |
1558 | ||
1559 | if (prot->tail_size) { | |
1560 | sg_unmark_end(&sgout[pages]); | |
1561 | sg_set_buf(&sgout[pages + 1], &dctx->tail, | |
1562 | prot->tail_size); | |
1563 | sg_mark_end(&sgout[pages + 1]); | |
0b243d00 | 1564 | } |
fd31f399 JK |
1565 | } else if (out_sg) { |
1566 | memcpy(sgout, out_sg, n_sgout * sizeof(*sgout)); | |
0b243d00 VG |
1567 | } |
1568 | ||
1569 | /* Prepare and submit AEAD request */ | |
6ececdc5 | 1570 | err = tls_do_decryption(sk, sgin, sgout, dctx->iv, |
603380f5 | 1571 | data_len + prot->tail_size, aead_req, darg); |
6bd116c8 JK |
1572 | if (err) |
1573 | goto exit_free_pages; | |
1574 | ||
fd31f399 JK |
1575 | darg->skb = clear_skb ?: tls_strp_msg(ctx); |
1576 | clear_skb = NULL; | |
c618db2a JK |
1577 | |
1578 | if (unlikely(darg->async)) { | |
84c61fe1 | 1579 | err = tls_strp_msg_hold(&ctx->strp, &ctx->async_hold); |
c618db2a JK |
1580 | if (err) |
1581 | __skb_queue_tail(&ctx->async_hold, darg->skb); | |
1582 | return err; | |
1583 | } | |
0b243d00 | 1584 | |
ce61327c | 1585 | if (prot->tail_size) |
b89fec54 | 1586 | darg->tail = dctx->tail; |
ce61327c | 1587 | |
6bd116c8 | 1588 | exit_free_pages: |
0b243d00 VG |
1589 | /* Release the pages in case iov was mapped to pages */ |
1590 | for (; pages > 0; pages--) | |
1591 | put_page(sg_page(&sgout[pages])); | |
03957d84 | 1592 | exit_free: |
0b243d00 | 1593 | kfree(mem); |
fd31f399 JK |
1594 | exit_free_skb: |
1595 | consume_skb(clear_skb); | |
0b243d00 VG |
1596 | return err; |
1597 | } | |
1598 | ||
8a958732 | 1599 | static int |
dd47ed36 JK |
1600 | tls_decrypt_sw(struct sock *sk, struct tls_context *tls_ctx, |
1601 | struct msghdr *msg, struct tls_decrypt_arg *darg) | |
dafb67f3 | 1602 | { |
541cc48b | 1603 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
4509de14 | 1604 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
541cc48b | 1605 | struct strp_msg *rxm; |
3764ae5b | 1606 | int pad, err; |
dafb67f3 | 1607 | |
dd47ed36 | 1608 | err = tls_decrypt_sg(sk, &msg->msg_iter, NULL, darg); |
a069a905 GP |
1609 | if (err < 0) { |
1610 | if (err == -EBADMSG) | |
1611 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSDECRYPTERROR); | |
3764ae5b | 1612 | return err; |
a069a905 | 1613 | } |
dd47ed36 JK |
1614 | /* keep going even for ->async, the code below is TLS 1.3 */ |
1615 | ||
ce61327c JK |
1616 | /* If opportunistic TLS 1.3 ZC failed retry without ZC */ |
1617 | if (unlikely(darg->zc && prot->version == TLS_1_3_VERSION && | |
1618 | darg->tail != TLS_RECORD_TYPE_DATA)) { | |
1619 | darg->zc = false; | |
bb56cea9 JK |
1620 | if (!darg->tail) |
1621 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXNOPADVIOL); | |
1090c1ea | 1622 | TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSDECRYPTRETRY); |
dd47ed36 | 1623 | return tls_decrypt_sw(sk, tls_ctx, msg, darg); |
ce61327c | 1624 | } |
dafb67f3 | 1625 | |
6bd116c8 JK |
1626 | pad = tls_padding_length(prot, darg->skb, darg); |
1627 | if (pad < 0) { | |
b93f5700 JK |
1628 | if (darg->skb != tls_strp_msg(ctx)) |
1629 | consume_skb(darg->skb); | |
3764ae5b | 1630 | return pad; |
6bd116c8 | 1631 | } |
3764ae5b | 1632 | |
6bd116c8 | 1633 | rxm = strp_msg(darg->skb); |
3764ae5b | 1634 | rxm->full_len -= pad; |
dd47ed36 JK |
1635 | |
1636 | return 0; | |
1637 | } | |
1638 | ||
1639 | static int | |
d4e5db64 JK |
1640 | tls_decrypt_device(struct sock *sk, struct msghdr *msg, |
1641 | struct tls_context *tls_ctx, struct tls_decrypt_arg *darg) | |
dd47ed36 JK |
1642 | { |
1643 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
1644 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
1645 | struct strp_msg *rxm; | |
1646 | int pad, err; | |
1647 | ||
1648 | if (tls_ctx->rx_conf != TLS_HW) | |
1649 | return 0; | |
1650 | ||
1651 | err = tls_device_decrypted(sk, tls_ctx); | |
1652 | if (err <= 0) | |
1653 | return err; | |
1654 | ||
1655 | pad = tls_padding_length(prot, tls_strp_msg(ctx), darg); | |
1656 | if (pad < 0) | |
1657 | return pad; | |
1658 | ||
dd47ed36 JK |
1659 | darg->async = false; |
1660 | darg->skb = tls_strp_msg(ctx); | |
d4e5db64 JK |
1661 | /* ->zc downgrade check, in case TLS 1.3 gets here */ |
1662 | darg->zc &= !(prot->version == TLS_1_3_VERSION && | |
1663 | tls_msg(darg->skb)->control != TLS_RECORD_TYPE_DATA); | |
dd47ed36 JK |
1664 | |
1665 | rxm = strp_msg(darg->skb); | |
1666 | rxm->full_len -= pad; | |
d4e5db64 JK |
1667 | |
1668 | if (!darg->zc) { | |
1669 | /* Non-ZC case needs a real skb */ | |
1670 | darg->skb = tls_strp_msg_detach(ctx); | |
1671 | if (!darg->skb) | |
1672 | return -ENOMEM; | |
1673 | } else { | |
1674 | unsigned int off, len; | |
1675 | ||
1676 | /* In ZC case nobody cares about the output skb. | |
1677 | * Just copy the data here. Note the skb is not fully trimmed. | |
1678 | */ | |
1679 | off = rxm->offset + prot->prepend_size; | |
1680 | len = rxm->full_len - prot->overhead_size; | |
1681 | ||
1682 | err = skb_copy_datagram_msg(darg->skb, off, msg, len); | |
1683 | if (err) | |
1684 | return err; | |
1685 | } | |
dd47ed36 JK |
1686 | return 1; |
1687 | } | |
1688 | ||
1689 | static int tls_rx_one_record(struct sock *sk, struct msghdr *msg, | |
1690 | struct tls_decrypt_arg *darg) | |
1691 | { | |
1692 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1693 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
1694 | struct strp_msg *rxm; | |
1695 | int err; | |
1696 | ||
d4e5db64 | 1697 | err = tls_decrypt_device(sk, msg, tls_ctx, darg); |
dd47ed36 JK |
1698 | if (!err) |
1699 | err = tls_decrypt_sw(sk, tls_ctx, msg, darg); | |
1700 | if (err < 0) | |
1701 | return err; | |
1702 | ||
1703 | rxm = strp_msg(darg->skb); | |
3764ae5b JK |
1704 | rxm->offset += prot->prepend_size; |
1705 | rxm->full_len -= prot->overhead_size; | |
3547a1f9 | 1706 | tls_advance_record_sn(sk, prot, &tls_ctx->rx); |
3764ae5b JK |
1707 | |
1708 | return 0; | |
dafb67f3 BP |
1709 | } |
1710 | ||
541cc48b | 1711 | int decrypt_skb(struct sock *sk, struct scatterlist *sgout) |
c46234eb | 1712 | { |
4175eac3 | 1713 | struct tls_decrypt_arg darg = { .zc = true, }; |
c46234eb | 1714 | |
541cc48b | 1715 | return tls_decrypt_sg(sk, NULL, sgout, &darg); |
c46234eb DW |
1716 | } |
1717 | ||
06554f4f JK |
1718 | static int tls_record_content_type(struct msghdr *msg, struct tls_msg *tlm, |
1719 | u8 *control) | |
1720 | { | |
1721 | int err; | |
1722 | ||
1723 | if (!*control) { | |
1724 | *control = tlm->control; | |
1725 | if (!*control) | |
1726 | return -EBADMSG; | |
1727 | ||
1728 | err = put_cmsg(msg, SOL_TLS, TLS_GET_RECORD_TYPE, | |
1729 | sizeof(*control), control); | |
1730 | if (*control != TLS_RECORD_TYPE_DATA) { | |
1731 | if (err || msg->msg_flags & MSG_CTRUNC) | |
1732 | return -EIO; | |
1733 | } | |
1734 | } else if (*control != tlm->control) { | |
1735 | return 0; | |
1736 | } | |
1737 | ||
1738 | return 1; | |
1739 | } | |
1740 | ||
abb47dc9 JK |
1741 | static void tls_rx_rec_done(struct tls_sw_context_rx *ctx) |
1742 | { | |
84c61fe1 | 1743 | tls_strp_msg_done(&ctx->strp); |
abb47dc9 JK |
1744 | } |
1745 | ||
692d7b5d | 1746 | /* This function traverses the rx_list in tls receive context to copies the |
2b794c40 | 1747 | * decrypted records into the buffer provided by caller zero copy is not |
692d7b5d VG |
1748 | * true. Further, the records are removed from the rx_list if it is not a peek |
1749 | * case and the record has been consumed completely. | |
1750 | */ | |
1751 | static int process_rx_list(struct tls_sw_context_rx *ctx, | |
1752 | struct msghdr *msg, | |
2b794c40 | 1753 | u8 *control, |
692d7b5d VG |
1754 | size_t skip, |
1755 | size_t len, | |
692d7b5d VG |
1756 | bool is_peek) |
1757 | { | |
1758 | struct sk_buff *skb = skb_peek(&ctx->rx_list); | |
2b794c40 | 1759 | struct tls_msg *tlm; |
692d7b5d | 1760 | ssize_t copied = 0; |
06554f4f | 1761 | int err; |
2b794c40 | 1762 | |
692d7b5d VG |
1763 | while (skip && skb) { |
1764 | struct strp_msg *rxm = strp_msg(skb); | |
2b794c40 VG |
1765 | tlm = tls_msg(skb); |
1766 | ||
06554f4f JK |
1767 | err = tls_record_content_type(msg, tlm, control); |
1768 | if (err <= 0) | |
4dcdd971 | 1769 | goto out; |
692d7b5d VG |
1770 | |
1771 | if (skip < rxm->full_len) | |
1772 | break; | |
1773 | ||
1774 | skip = skip - rxm->full_len; | |
1775 | skb = skb_peek_next(skb, &ctx->rx_list); | |
1776 | } | |
1777 | ||
1778 | while (len && skb) { | |
1779 | struct sk_buff *next_skb; | |
1780 | struct strp_msg *rxm = strp_msg(skb); | |
1781 | int chunk = min_t(unsigned int, rxm->full_len - skip, len); | |
1782 | ||
2b794c40 VG |
1783 | tlm = tls_msg(skb); |
1784 | ||
06554f4f JK |
1785 | err = tls_record_content_type(msg, tlm, control); |
1786 | if (err <= 0) | |
4dcdd971 | 1787 | goto out; |
2b794c40 | 1788 | |
cbbdee99 JK |
1789 | err = skb_copy_datagram_msg(skb, rxm->offset + skip, |
1790 | msg, chunk); | |
1791 | if (err < 0) | |
1792 | goto out; | |
692d7b5d VG |
1793 | |
1794 | len = len - chunk; | |
1795 | copied = copied + chunk; | |
1796 | ||
1797 | /* Consume the data from record if it is non-peek case*/ | |
1798 | if (!is_peek) { | |
1799 | rxm->offset = rxm->offset + chunk; | |
1800 | rxm->full_len = rxm->full_len - chunk; | |
1801 | ||
1802 | /* Return if there is unconsumed data in the record */ | |
1803 | if (rxm->full_len - skip) | |
1804 | break; | |
1805 | } | |
1806 | ||
1807 | /* The remaining skip-bytes must lie in 1st record in rx_list. | |
1808 | * So from the 2nd record, 'skip' should be 0. | |
1809 | */ | |
1810 | skip = 0; | |
1811 | ||
1812 | if (msg) | |
1813 | msg->msg_flags |= MSG_EOR; | |
1814 | ||
1815 | next_skb = skb_peek_next(skb, &ctx->rx_list); | |
1816 | ||
1817 | if (!is_peek) { | |
a30295c4 | 1818 | __skb_unlink(skb, &ctx->rx_list); |
a88c26f6 | 1819 | consume_skb(skb); |
692d7b5d VG |
1820 | } |
1821 | ||
1822 | skb = next_skb; | |
1823 | } | |
4dcdd971 | 1824 | err = 0; |
692d7b5d | 1825 | |
4dcdd971 JK |
1826 | out: |
1827 | return copied ? : err; | |
692d7b5d VG |
1828 | } |
1829 | ||
84c61fe1 | 1830 | static bool |
c46b0183 JK |
1831 | tls_read_flush_backlog(struct sock *sk, struct tls_prot_info *prot, |
1832 | size_t len_left, size_t decrypted, ssize_t done, | |
1833 | size_t *flushed_at) | |
1834 | { | |
1835 | size_t max_rec; | |
1836 | ||
1837 | if (len_left <= decrypted) | |
84c61fe1 | 1838 | return false; |
c46b0183 JK |
1839 | |
1840 | max_rec = prot->overhead_size - prot->tail_size + TLS_MAX_PAYLOAD_SIZE; | |
1841 | if (done - *flushed_at < SZ_128K && tcp_inq(sk) > max_rec) | |
84c61fe1 | 1842 | return false; |
c46b0183 JK |
1843 | |
1844 | *flushed_at = done; | |
84c61fe1 | 1845 | return sk_flush_backlog(sk); |
c46b0183 JK |
1846 | } |
1847 | ||
70f03fc2 JK |
1848 | static int tls_rx_reader_lock(struct sock *sk, struct tls_sw_context_rx *ctx, |
1849 | bool nonblock) | |
4cbc325e JK |
1850 | { |
1851 | long timeo; | |
dde06aaa | 1852 | int err; |
4cbc325e JK |
1853 | |
1854 | lock_sock(sk); | |
1855 | ||
1856 | timeo = sock_rcvtimeo(sk, nonblock); | |
1857 | ||
1858 | while (unlikely(ctx->reader_present)) { | |
1859 | DEFINE_WAIT_FUNC(wait, woken_wake_function); | |
1860 | ||
1861 | ctx->reader_contended = 1; | |
1862 | ||
1863 | add_wait_queue(&ctx->wq, &wait); | |
1864 | sk_wait_event(sk, &timeo, | |
1865 | !READ_ONCE(ctx->reader_present), &wait); | |
1866 | remove_wait_queue(&ctx->wq, &wait); | |
1867 | ||
dde06aaa JK |
1868 | if (timeo <= 0) { |
1869 | err = -EAGAIN; | |
1870 | goto err_unlock; | |
1871 | } | |
1872 | if (signal_pending(current)) { | |
1873 | err = sock_intr_errno(timeo); | |
1874 | goto err_unlock; | |
1875 | } | |
4cbc325e JK |
1876 | } |
1877 | ||
1878 | WRITE_ONCE(ctx->reader_present, 1); | |
1879 | ||
70f03fc2 | 1880 | return 0; |
dde06aaa JK |
1881 | |
1882 | err_unlock: | |
1883 | release_sock(sk); | |
1884 | return err; | |
4cbc325e JK |
1885 | } |
1886 | ||
1887 | static void tls_rx_reader_unlock(struct sock *sk, struct tls_sw_context_rx *ctx) | |
1888 | { | |
1889 | if (unlikely(ctx->reader_contended)) { | |
1890 | if (wq_has_sleeper(&ctx->wq)) | |
1891 | wake_up(&ctx->wq); | |
1892 | else | |
1893 | ctx->reader_contended = 0; | |
1894 | ||
1895 | WARN_ON_ONCE(!ctx->reader_present); | |
1896 | } | |
1897 | ||
1898 | WRITE_ONCE(ctx->reader_present, 0); | |
1899 | release_sock(sk); | |
1900 | } | |
1901 | ||
c46234eb DW |
1902 | int tls_sw_recvmsg(struct sock *sk, |
1903 | struct msghdr *msg, | |
1904 | size_t len, | |
c46234eb DW |
1905 | int flags, |
1906 | int *addr_len) | |
1907 | { | |
1908 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1909 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
4509de14 | 1910 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
cbbdee99 | 1911 | ssize_t decrypted = 0, async_copy_bytes = 0; |
d3b18ad3 | 1912 | struct sk_psock *psock; |
692d7b5d | 1913 | unsigned char control = 0; |
c46b0183 | 1914 | size_t flushed_at = 0; |
c46234eb | 1915 | struct strp_msg *rxm; |
2b794c40 | 1916 | struct tls_msg *tlm; |
c46234eb | 1917 | ssize_t copied = 0; |
7da18bcc | 1918 | bool async = false; |
70f03fc2 | 1919 | int target, err; |
00e23707 | 1920 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
692d7b5d | 1921 | bool is_peek = flags & MSG_PEEK; |
84c61fe1 | 1922 | bool released = true; |
e91de6af | 1923 | bool bpf_strp_enabled; |
ba13609d | 1924 | bool zc_capable; |
c46234eb | 1925 | |
c46234eb DW |
1926 | if (unlikely(flags & MSG_ERRQUEUE)) |
1927 | return sock_recv_errqueue(sk, msg, len, SOL_IP, IP_RECVERR); | |
1928 | ||
d3b18ad3 | 1929 | psock = sk_psock_get(sk); |
70f03fc2 JK |
1930 | err = tls_rx_reader_lock(sk, ctx, flags & MSG_DONTWAIT); |
1931 | if (err < 0) | |
1932 | return err; | |
e91de6af | 1933 | bpf_strp_enabled = sk_psock_strp_enabled(psock); |
c46234eb | 1934 | |
f314bfee JK |
1935 | /* If crypto failed the connection is broken */ |
1936 | err = ctx->async_wait.err; | |
1937 | if (err) | |
1938 | goto end; | |
1939 | ||
692d7b5d | 1940 | /* Process pending decrypted records. It must be non-zero-copy */ |
cbbdee99 | 1941 | err = process_rx_list(ctx, msg, &control, 0, len, is_peek); |
4dcdd971 | 1942 | if (err < 0) |
692d7b5d | 1943 | goto end; |
692d7b5d | 1944 | |
d5123edd | 1945 | copied = err; |
46a16959 | 1946 | if (len <= copied) |
bfc06e1a | 1947 | goto end; |
46a16959 JK |
1948 | |
1949 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); | |
1950 | len = len - copied; | |
692d7b5d | 1951 | |
ba13609d | 1952 | zc_capable = !bpf_strp_enabled && !is_kvec && !is_peek && |
88527790 | 1953 | ctx->zc_capable; |
bfc06e1a | 1954 | decrypted = 0; |
b92a13d4 | 1955 | while (len && (decrypted + copied < target || tls_strp_msg_ready(ctx))) { |
6bd116c8 | 1956 | struct tls_decrypt_arg darg; |
9bdf75cc | 1957 | int to_decrypt, chunk; |
c46234eb | 1958 | |
70f03fc2 JK |
1959 | err = tls_rx_rec_wait(sk, psock, flags & MSG_DONTWAIT, |
1960 | released); | |
35560b7f | 1961 | if (err <= 0) { |
d3b18ad3 | 1962 | if (psock) { |
0775639c JK |
1963 | chunk = sk_msg_recvmsg(sk, psock, msg, len, |
1964 | flags); | |
008141de JK |
1965 | if (chunk > 0) { |
1966 | decrypted += chunk; | |
1967 | len -= chunk; | |
1968 | continue; | |
1969 | } | |
d3b18ad3 | 1970 | } |
c46234eb | 1971 | goto recv_end; |
d3b18ad3 | 1972 | } |
c46234eb | 1973 | |
6bd116c8 JK |
1974 | memset(&darg.inargs, 0, sizeof(darg.inargs)); |
1975 | ||
84c61fe1 JK |
1976 | rxm = strp_msg(tls_strp_msg(ctx)); |
1977 | tlm = tls_msg(tls_strp_msg(ctx)); | |
94524d8f | 1978 | |
4509de14 | 1979 | to_decrypt = rxm->full_len - prot->overhead_size; |
fedf201e | 1980 | |
ba13609d JK |
1981 | if (zc_capable && to_decrypt <= len && |
1982 | tlm->control == TLS_RECORD_TYPE_DATA) | |
4175eac3 | 1983 | darg.zc = true; |
fedf201e | 1984 | |
c0ab4732 | 1985 | /* Do not use async mode if record is non-data */ |
c3f6bb74 | 1986 | if (tlm->control == TLS_RECORD_TYPE_DATA && !bpf_strp_enabled) |
4175eac3 | 1987 | darg.async = ctx->async_capable; |
c0ab4732 | 1988 | else |
4175eac3 | 1989 | darg.async = false; |
c0ab4732 | 1990 | |
dd47ed36 | 1991 | err = tls_rx_one_record(sk, msg, &darg); |
3547a1f9 | 1992 | if (err < 0) { |
da353fac | 1993 | tls_err_abort(sk, -EBADMSG); |
fedf201e DW |
1994 | goto recv_end; |
1995 | } | |
1996 | ||
3547a1f9 | 1997 | async |= darg.async; |
2b794c40 VG |
1998 | |
1999 | /* If the type of records being processed is not known yet, | |
2000 | * set it to record type just dequeued. If it is already known, | |
2001 | * but does not match the record type just dequeued, go to end. | |
2002 | * We always get record type here since for tls1.2, record type | |
2003 | * is known just after record is dequeued from stream parser. | |
2004 | * For tls1.3, we disable async. | |
2005 | */ | |
b93f5700 | 2006 | err = tls_record_content_type(msg, tls_msg(darg.skb), &control); |
abb47dc9 | 2007 | if (err <= 0) { |
b93f5700 | 2008 | DEBUG_NET_WARN_ON_ONCE(darg.zc); |
abb47dc9 JK |
2009 | tls_rx_rec_done(ctx); |
2010 | put_on_rx_list_err: | |
b93f5700 | 2011 | __skb_queue_tail(&ctx->rx_list, darg.skb); |
2b794c40 | 2012 | goto recv_end; |
abb47dc9 | 2013 | } |
fedf201e | 2014 | |
c46b0183 | 2015 | /* periodically flush backlog, and feed strparser */ |
84c61fe1 JK |
2016 | released = tls_read_flush_backlog(sk, prot, len, to_decrypt, |
2017 | decrypted + copied, | |
2018 | &flushed_at); | |
c46b0183 | 2019 | |
abb47dc9 | 2020 | /* TLS 1.3 may have updated the length by more than overhead */ |
b93f5700 | 2021 | rxm = strp_msg(darg.skb); |
abb47dc9 JK |
2022 | chunk = rxm->full_len; |
2023 | tls_rx_rec_done(ctx); | |
b1a2c178 | 2024 | |
4175eac3 | 2025 | if (!darg.zc) { |
f940b6ef | 2026 | bool partially_consumed = chunk > len; |
b93f5700 JK |
2027 | struct sk_buff *skb = darg.skb; |
2028 | ||
e20691fa | 2029 | DEBUG_NET_WARN_ON_ONCE(darg.skb == ctx->strp.anchor); |
f940b6ef | 2030 | |
cbbdee99 JK |
2031 | if (async) { |
2032 | /* TLS 1.2-only, to_decrypt must be text len */ | |
2033 | chunk = min_t(int, to_decrypt, len); | |
2034 | async_copy_bytes += chunk; | |
2035 | put_on_rx_list: | |
2036 | decrypted += chunk; | |
2037 | len -= chunk; | |
2038 | __skb_queue_tail(&ctx->rx_list, skb); | |
2039 | continue; | |
2040 | } | |
2041 | ||
e91de6af | 2042 | if (bpf_strp_enabled) { |
84c61fe1 | 2043 | released = true; |
e91de6af JF |
2044 | err = sk_psock_tls_strp_read(psock, skb); |
2045 | if (err != __SK_PASS) { | |
2046 | rxm->offset = rxm->offset + rxm->full_len; | |
2047 | rxm->full_len = 0; | |
2048 | if (err == __SK_DROP) | |
2049 | consume_skb(skb); | |
e91de6af JF |
2050 | continue; |
2051 | } | |
2052 | } | |
2053 | ||
f940b6ef | 2054 | if (partially_consumed) |
fedf201e | 2055 | chunk = len; |
692d7b5d | 2056 | |
fedf201e DW |
2057 | err = skb_copy_datagram_msg(skb, rxm->offset, |
2058 | msg, chunk); | |
abb47dc9 JK |
2059 | if (err < 0) |
2060 | goto put_on_rx_list_err; | |
94524d8f | 2061 | |
f940b6ef | 2062 | if (is_peek) |
008141de | 2063 | goto put_on_rx_list; |
f940b6ef JK |
2064 | |
2065 | if (partially_consumed) { | |
2066 | rxm->offset += chunk; | |
2067 | rxm->full_len -= chunk; | |
008141de | 2068 | goto put_on_rx_list; |
692d7b5d | 2069 | } |
b93f5700 JK |
2070 | |
2071 | consume_skb(skb); | |
c46234eb DW |
2072 | } |
2073 | ||
692d7b5d | 2074 | decrypted += chunk; |
c46234eb | 2075 | len -= chunk; |
692d7b5d | 2076 | |
f940b6ef JK |
2077 | /* Return full control message to userspace before trying |
2078 | * to parse another message type | |
2079 | */ | |
2080 | msg->msg_flags |= MSG_EOR; | |
2081 | if (control != TLS_RECORD_TYPE_DATA) | |
2082 | break; | |
04b25a54 | 2083 | } |
c46234eb DW |
2084 | |
2085 | recv_end: | |
7da18bcc | 2086 | if (async) { |
f314bfee | 2087 | int ret, pending; |
7da18bcc | 2088 | |
94524d8f | 2089 | /* Wait for all previously submitted records to be decrypted */ |
0cada332 | 2090 | spin_lock_bh(&ctx->decrypt_compl_lock); |
37943f04 | 2091 | reinit_completion(&ctx->async_wait.completion); |
0cada332 VKY |
2092 | pending = atomic_read(&ctx->decrypt_pending); |
2093 | spin_unlock_bh(&ctx->decrypt_compl_lock); | |
c618db2a JK |
2094 | ret = 0; |
2095 | if (pending) | |
f314bfee | 2096 | ret = crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
c618db2a JK |
2097 | __skb_queue_purge(&ctx->async_hold); |
2098 | ||
2099 | if (ret) { | |
2100 | if (err >= 0 || err == -EINPROGRESS) | |
2101 | err = ret; | |
2102 | decrypted = 0; | |
2103 | goto end; | |
94524d8f | 2104 | } |
0cada332 | 2105 | |
692d7b5d VG |
2106 | /* Drain records from the rx_list & copy if required */ |
2107 | if (is_peek || is_kvec) | |
06554f4f | 2108 | err = process_rx_list(ctx, msg, &control, copied, |
cbbdee99 | 2109 | decrypted, is_peek); |
692d7b5d | 2110 | else |
06554f4f | 2111 | err = process_rx_list(ctx, msg, &control, 0, |
cbbdee99 | 2112 | async_copy_bytes, is_peek); |
4dcdd971 | 2113 | decrypted = max(err, 0); |
94524d8f VG |
2114 | } |
2115 | ||
692d7b5d VG |
2116 | copied += decrypted; |
2117 | ||
2118 | end: | |
4cbc325e | 2119 | tls_rx_reader_unlock(sk, ctx); |
d3b18ad3 JF |
2120 | if (psock) |
2121 | sk_psock_put(sk, psock); | |
c46234eb DW |
2122 | return copied ? : err; |
2123 | } | |
2124 | ||
2125 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, | |
2126 | struct pipe_inode_info *pipe, | |
2127 | size_t len, unsigned int flags) | |
2128 | { | |
2129 | struct tls_context *tls_ctx = tls_get_ctx(sock->sk); | |
f66de3ee | 2130 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
2131 | struct strp_msg *rxm = NULL; |
2132 | struct sock *sk = sock->sk; | |
c3f6bb74 | 2133 | struct tls_msg *tlm; |
c46234eb DW |
2134 | struct sk_buff *skb; |
2135 | ssize_t copied = 0; | |
c46234eb | 2136 | int chunk; |
70f03fc2 | 2137 | int err; |
c46234eb | 2138 | |
70f03fc2 JK |
2139 | err = tls_rx_reader_lock(sk, ctx, flags & SPLICE_F_NONBLOCK); |
2140 | if (err < 0) | |
2141 | return err; | |
c46234eb | 2142 | |
abb47dc9 | 2143 | if (!skb_queue_empty(&ctx->rx_list)) { |
e062fe99 JK |
2144 | skb = __skb_dequeue(&ctx->rx_list); |
2145 | } else { | |
6bd116c8 | 2146 | struct tls_decrypt_arg darg; |
4175eac3 | 2147 | |
35560b7f | 2148 | err = tls_rx_rec_wait(sk, NULL, flags & SPLICE_F_NONBLOCK, |
70f03fc2 | 2149 | true); |
35560b7f | 2150 | if (err <= 0) |
e062fe99 | 2151 | goto splice_read_end; |
c46234eb | 2152 | |
6bd116c8 JK |
2153 | memset(&darg.inargs, 0, sizeof(darg.inargs)); |
2154 | ||
541cc48b | 2155 | err = tls_rx_one_record(sk, NULL, &darg); |
e062fe99 JK |
2156 | if (err < 0) { |
2157 | tls_err_abort(sk, -EBADMSG); | |
2158 | goto splice_read_end; | |
2159 | } | |
abb47dc9 JK |
2160 | |
2161 | tls_rx_rec_done(ctx); | |
6bd116c8 | 2162 | skb = darg.skb; |
520493f6 | 2163 | } |
fedf201e | 2164 | |
c3f6bb74 JK |
2165 | rxm = strp_msg(skb); |
2166 | tlm = tls_msg(skb); | |
2167 | ||
520493f6 | 2168 | /* splice does not support reading control messages */ |
c3f6bb74 | 2169 | if (tlm->control != TLS_RECORD_TYPE_DATA) { |
520493f6 | 2170 | err = -EINVAL; |
abb47dc9 | 2171 | goto splice_requeue; |
c46234eb | 2172 | } |
520493f6 | 2173 | |
c46234eb DW |
2174 | chunk = min_t(unsigned int, rxm->full_len, len); |
2175 | copied = skb_splice_bits(skb, sk, rxm->offset, pipe, chunk, flags); | |
2176 | if (copied < 0) | |
abb47dc9 | 2177 | goto splice_requeue; |
c46234eb | 2178 | |
e062fe99 | 2179 | if (chunk < rxm->full_len) { |
e062fe99 JK |
2180 | rxm->offset += len; |
2181 | rxm->full_len -= len; | |
abb47dc9 | 2182 | goto splice_requeue; |
e062fe99 | 2183 | } |
c46234eb | 2184 | |
abb47dc9 JK |
2185 | consume_skb(skb); |
2186 | ||
c46234eb | 2187 | splice_read_end: |
4cbc325e | 2188 | tls_rx_reader_unlock(sk, ctx); |
c46234eb | 2189 | return copied ? : err; |
abb47dc9 JK |
2190 | |
2191 | splice_requeue: | |
2192 | __skb_queue_head(&ctx->rx_list, skb); | |
2193 | goto splice_read_end; | |
c46234eb DW |
2194 | } |
2195 | ||
7b50ecfc | 2196 | bool tls_sw_sock_is_readable(struct sock *sk) |
c46234eb | 2197 | { |
c46234eb | 2198 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 2199 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 JF |
2200 | bool ingress_empty = true; |
2201 | struct sk_psock *psock; | |
c46234eb | 2202 | |
d3b18ad3 JF |
2203 | rcu_read_lock(); |
2204 | psock = sk_psock(sk); | |
2205 | if (psock) | |
2206 | ingress_empty = list_empty(&psock->ingress_msg); | |
2207 | rcu_read_unlock(); | |
c46234eb | 2208 | |
b92a13d4 | 2209 | return !ingress_empty || tls_strp_msg_ready(ctx) || |
13aecb17 | 2210 | !skb_queue_empty(&ctx->rx_list); |
c46234eb DW |
2211 | } |
2212 | ||
84c61fe1 | 2213 | int tls_rx_msg_size(struct tls_strparser *strp, struct sk_buff *skb) |
c46234eb DW |
2214 | { |
2215 | struct tls_context *tls_ctx = tls_get_ctx(strp->sk); | |
4509de14 | 2216 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
3463e51d | 2217 | char header[TLS_HEADER_SIZE + MAX_IV_SIZE]; |
c46234eb DW |
2218 | size_t cipher_overhead; |
2219 | size_t data_len = 0; | |
2220 | int ret; | |
2221 | ||
2222 | /* Verify that we have a full TLS header, or wait for more data */ | |
84c61fe1 | 2223 | if (strp->stm.offset + prot->prepend_size > skb->len) |
c46234eb DW |
2224 | return 0; |
2225 | ||
3463e51d | 2226 | /* Sanity-check size of on-stack buffer. */ |
4509de14 | 2227 | if (WARN_ON(prot->prepend_size > sizeof(header))) { |
3463e51d KC |
2228 | ret = -EINVAL; |
2229 | goto read_failure; | |
2230 | } | |
2231 | ||
c46234eb | 2232 | /* Linearize header to local buffer */ |
84c61fe1 | 2233 | ret = skb_copy_bits(skb, strp->stm.offset, header, prot->prepend_size); |
c46234eb DW |
2234 | if (ret < 0) |
2235 | goto read_failure; | |
2236 | ||
84c61fe1 | 2237 | strp->mark = header[0]; |
c46234eb DW |
2238 | |
2239 | data_len = ((header[4] & 0xFF) | (header[3] << 8)); | |
2240 | ||
4509de14 | 2241 | cipher_overhead = prot->tag_size; |
a6acbe62 VF |
2242 | if (prot->version != TLS_1_3_VERSION && |
2243 | prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) | |
4509de14 | 2244 | cipher_overhead += prot->iv_size; |
c46234eb | 2245 | |
130b392c | 2246 | if (data_len > TLS_MAX_PAYLOAD_SIZE + cipher_overhead + |
4509de14 | 2247 | prot->tail_size) { |
c46234eb DW |
2248 | ret = -EMSGSIZE; |
2249 | goto read_failure; | |
2250 | } | |
2251 | if (data_len < cipher_overhead) { | |
2252 | ret = -EBADMSG; | |
2253 | goto read_failure; | |
2254 | } | |
2255 | ||
130b392c DW |
2256 | /* Note that both TLS1.3 and TLS1.2 use TLS_1_2 version here */ |
2257 | if (header[1] != TLS_1_2_VERSION_MINOR || | |
2258 | header[2] != TLS_1_2_VERSION_MAJOR) { | |
c46234eb DW |
2259 | ret = -EINVAL; |
2260 | goto read_failure; | |
2261 | } | |
be2fbc15 | 2262 | |
f953d33b | 2263 | tls_device_rx_resync_new_rec(strp->sk, data_len + TLS_HEADER_SIZE, |
84c61fe1 | 2264 | TCP_SKB_CB(skb)->seq + strp->stm.offset); |
c46234eb DW |
2265 | return data_len + TLS_HEADER_SIZE; |
2266 | ||
2267 | read_failure: | |
2268 | tls_err_abort(strp->sk, ret); | |
2269 | ||
2270 | return ret; | |
2271 | } | |
2272 | ||
84c61fe1 | 2273 | void tls_rx_msg_ready(struct tls_strparser *strp) |
c46234eb | 2274 | { |
84c61fe1 | 2275 | struct tls_sw_context_rx *ctx; |
c46234eb | 2276 | |
84c61fe1 | 2277 | ctx = container_of(strp, struct tls_sw_context_rx, strp); |
ad13acce | 2278 | ctx->saved_data_ready(strp->sk); |
c46234eb DW |
2279 | } |
2280 | ||
2281 | static void tls_data_ready(struct sock *sk) | |
2282 | { | |
2283 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 2284 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 | 2285 | struct sk_psock *psock; |
c46234eb | 2286 | |
84c61fe1 | 2287 | tls_strp_data_ready(&ctx->strp); |
d3b18ad3 JF |
2288 | |
2289 | psock = sk_psock_get(sk); | |
62b4011f XY |
2290 | if (psock) { |
2291 | if (!list_empty(&psock->ingress_msg)) | |
2292 | ctx->saved_data_ready(sk); | |
d3b18ad3 JF |
2293 | sk_psock_put(sk, psock); |
2294 | } | |
c46234eb DW |
2295 | } |
2296 | ||
f87e62d4 JF |
2297 | void tls_sw_cancel_work_tx(struct tls_context *tls_ctx) |
2298 | { | |
2299 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
2300 | ||
2301 | set_bit(BIT_TX_CLOSING, &ctx->tx_bitmask); | |
2302 | set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask); | |
2303 | cancel_delayed_work_sync(&ctx->tx_work.work); | |
2304 | } | |
2305 | ||
313ab004 | 2306 | void tls_sw_release_resources_tx(struct sock *sk) |
3c4d7559 DW |
2307 | { |
2308 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 2309 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 2310 | struct tls_rec *rec, *tmp; |
38f7e1c0 | 2311 | int pending; |
a42055e8 VG |
2312 | |
2313 | /* Wait for any pending async encryptions to complete */ | |
38f7e1c0 RM |
2314 | spin_lock_bh(&ctx->encrypt_compl_lock); |
2315 | ctx->async_notify = true; | |
2316 | pending = atomic_read(&ctx->encrypt_pending); | |
2317 | spin_unlock_bh(&ctx->encrypt_compl_lock); | |
2318 | ||
2319 | if (pending) | |
a42055e8 VG |
2320 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
2321 | ||
a42055e8 VG |
2322 | tls_tx_records(sk, -1); |
2323 | ||
9932a29a | 2324 | /* Free up un-sent records in tx_list. First, free |
a42055e8 VG |
2325 | * the partially sent record if any at head of tx_list. |
2326 | */ | |
c5daa6cc JK |
2327 | if (tls_ctx->partially_sent_record) { |
2328 | tls_free_partial_record(sk, tls_ctx); | |
9932a29a | 2329 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
2330 | struct tls_rec, list); |
2331 | list_del(&rec->list); | |
d829e9c4 | 2332 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
2333 | kfree(rec); |
2334 | } | |
2335 | ||
9932a29a | 2336 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { |
a42055e8 | 2337 | list_del(&rec->list); |
d829e9c4 DB |
2338 | sk_msg_free(sk, &rec->msg_encrypted); |
2339 | sk_msg_free(sk, &rec->msg_plaintext); | |
a42055e8 VG |
2340 | kfree(rec); |
2341 | } | |
3c4d7559 | 2342 | |
201876b3 | 2343 | crypto_free_aead(ctx->aead_send); |
c774973e | 2344 | tls_free_open_rec(sk); |
313ab004 JF |
2345 | } |
2346 | ||
2347 | void tls_sw_free_ctx_tx(struct tls_context *tls_ctx) | |
2348 | { | |
2349 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
f66de3ee BP |
2350 | |
2351 | kfree(ctx); | |
2352 | } | |
2353 | ||
39f56e1a | 2354 | void tls_sw_release_resources_rx(struct sock *sk) |
f66de3ee BP |
2355 | { |
2356 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
2357 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
2358 | ||
12c76861 JK |
2359 | kfree(tls_ctx->rx.rec_seq); |
2360 | kfree(tls_ctx->rx.iv); | |
2361 | ||
c46234eb | 2362 | if (ctx->aead_recv) { |
a30295c4 | 2363 | __skb_queue_purge(&ctx->rx_list); |
c46234eb | 2364 | crypto_free_aead(ctx->aead_recv); |
84c61fe1 | 2365 | tls_strp_stop(&ctx->strp); |
313ab004 | 2366 | /* If tls_sw_strparser_arm() was not called (cleanup paths) |
84c61fe1 | 2367 | * we still want to tls_strp_stop(), but sk->sk_data_ready was |
313ab004 JF |
2368 | * never swapped. |
2369 | */ | |
2370 | if (ctx->saved_data_ready) { | |
2371 | write_lock_bh(&sk->sk_callback_lock); | |
2372 | sk->sk_data_ready = ctx->saved_data_ready; | |
2373 | write_unlock_bh(&sk->sk_callback_lock); | |
2374 | } | |
c46234eb | 2375 | } |
39f56e1a BP |
2376 | } |
2377 | ||
313ab004 | 2378 | void tls_sw_strparser_done(struct tls_context *tls_ctx) |
39f56e1a | 2379 | { |
39f56e1a BP |
2380 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
2381 | ||
84c61fe1 | 2382 | tls_strp_done(&ctx->strp); |
313ab004 JF |
2383 | } |
2384 | ||
2385 | void tls_sw_free_ctx_rx(struct tls_context *tls_ctx) | |
2386 | { | |
2387 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
3c4d7559 | 2388 | |
3c4d7559 DW |
2389 | kfree(ctx); |
2390 | } | |
2391 | ||
313ab004 JF |
2392 | void tls_sw_free_resources_rx(struct sock *sk) |
2393 | { | |
2394 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
2395 | ||
2396 | tls_sw_release_resources_rx(sk); | |
2397 | tls_sw_free_ctx_rx(tls_ctx); | |
2398 | } | |
2399 | ||
9932a29a | 2400 | /* The work handler to transmitt the encrypted records in tx_list */ |
a42055e8 VG |
2401 | static void tx_work_handler(struct work_struct *work) |
2402 | { | |
2403 | struct delayed_work *delayed_work = to_delayed_work(work); | |
2404 | struct tx_work *tx_work = container_of(delayed_work, | |
2405 | struct tx_work, work); | |
2406 | struct sock *sk = tx_work->sk; | |
2407 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f87e62d4 | 2408 | struct tls_sw_context_tx *ctx; |
a42055e8 | 2409 | |
f87e62d4 | 2410 | if (unlikely(!tls_ctx)) |
a42055e8 VG |
2411 | return; |
2412 | ||
f87e62d4 JF |
2413 | ctx = tls_sw_ctx_tx(tls_ctx); |
2414 | if (test_bit(BIT_TX_CLOSING, &ctx->tx_bitmask)) | |
2415 | return; | |
2416 | ||
2417 | if (!test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
2418 | return; | |
79ffe608 | 2419 | mutex_lock(&tls_ctx->tx_lock); |
a42055e8 VG |
2420 | lock_sock(sk); |
2421 | tls_tx_records(sk, -1); | |
2422 | release_sock(sk); | |
79ffe608 | 2423 | mutex_unlock(&tls_ctx->tx_lock); |
a42055e8 VG |
2424 | } |
2425 | ||
58790314 JK |
2426 | static bool tls_is_tx_ready(struct tls_sw_context_tx *ctx) |
2427 | { | |
2428 | struct tls_rec *rec; | |
2429 | ||
2430 | rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); | |
2431 | if (!rec) | |
2432 | return false; | |
2433 | ||
2434 | return READ_ONCE(rec->tx_ready); | |
2435 | } | |
2436 | ||
7463d3a2 BP |
2437 | void tls_sw_write_space(struct sock *sk, struct tls_context *ctx) |
2438 | { | |
2439 | struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx); | |
2440 | ||
2441 | /* Schedule the transmission if tx list is ready */ | |
58790314 | 2442 | if (tls_is_tx_ready(tx_ctx) && |
02b1fa07 JK |
2443 | !test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask)) |
2444 | schedule_delayed_work(&tx_ctx->tx_work.work, 0); | |
7463d3a2 BP |
2445 | } |
2446 | ||
318892ac JK |
2447 | void tls_sw_strparser_arm(struct sock *sk, struct tls_context *tls_ctx) |
2448 | { | |
2449 | struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(tls_ctx); | |
2450 | ||
2451 | write_lock_bh(&sk->sk_callback_lock); | |
2452 | rx_ctx->saved_data_ready = sk->sk_data_ready; | |
2453 | sk->sk_data_ready = tls_data_ready; | |
2454 | write_unlock_bh(&sk->sk_callback_lock); | |
318892ac JK |
2455 | } |
2456 | ||
88527790 JK |
2457 | void tls_update_rx_zc_capable(struct tls_context *tls_ctx) |
2458 | { | |
2459 | struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(tls_ctx); | |
2460 | ||
2461 | rx_ctx->zc_capable = tls_ctx->rx_no_pad || | |
2462 | tls_ctx->prot_info.version != TLS_1_3_VERSION; | |
2463 | } | |
2464 | ||
c46234eb | 2465 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx) |
3c4d7559 | 2466 | { |
4509de14 VG |
2467 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
2468 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
3c4d7559 | 2469 | struct tls_crypto_info *crypto_info; |
f66de3ee BP |
2470 | struct tls_sw_context_tx *sw_ctx_tx = NULL; |
2471 | struct tls_sw_context_rx *sw_ctx_rx = NULL; | |
c46234eb DW |
2472 | struct cipher_context *cctx; |
2473 | struct crypto_aead **aead; | |
f295b3ae | 2474 | u16 nonce_size, tag_size, iv_size, rec_seq_size, salt_size; |
692d7b5d | 2475 | struct crypto_tfm *tfm; |
f295b3ae | 2476 | char *iv, *rec_seq, *key, *salt, *cipher_name; |
fb99bce7 | 2477 | size_t keysize; |
3c4d7559 DW |
2478 | int rc = 0; |
2479 | ||
2480 | if (!ctx) { | |
2481 | rc = -EINVAL; | |
2482 | goto out; | |
2483 | } | |
2484 | ||
f66de3ee | 2485 | if (tx) { |
b190a587 BP |
2486 | if (!ctx->priv_ctx_tx) { |
2487 | sw_ctx_tx = kzalloc(sizeof(*sw_ctx_tx), GFP_KERNEL); | |
2488 | if (!sw_ctx_tx) { | |
2489 | rc = -ENOMEM; | |
2490 | goto out; | |
2491 | } | |
2492 | ctx->priv_ctx_tx = sw_ctx_tx; | |
2493 | } else { | |
2494 | sw_ctx_tx = | |
2495 | (struct tls_sw_context_tx *)ctx->priv_ctx_tx; | |
c46234eb | 2496 | } |
c46234eb | 2497 | } else { |
b190a587 BP |
2498 | if (!ctx->priv_ctx_rx) { |
2499 | sw_ctx_rx = kzalloc(sizeof(*sw_ctx_rx), GFP_KERNEL); | |
2500 | if (!sw_ctx_rx) { | |
2501 | rc = -ENOMEM; | |
2502 | goto out; | |
2503 | } | |
2504 | ctx->priv_ctx_rx = sw_ctx_rx; | |
2505 | } else { | |
2506 | sw_ctx_rx = | |
2507 | (struct tls_sw_context_rx *)ctx->priv_ctx_rx; | |
f66de3ee | 2508 | } |
3c4d7559 DW |
2509 | } |
2510 | ||
c46234eb | 2511 | if (tx) { |
b190a587 | 2512 | crypto_init_wait(&sw_ctx_tx->async_wait); |
0cada332 | 2513 | spin_lock_init(&sw_ctx_tx->encrypt_compl_lock); |
86029d10 | 2514 | crypto_info = &ctx->crypto_send.info; |
c46234eb | 2515 | cctx = &ctx->tx; |
f66de3ee | 2516 | aead = &sw_ctx_tx->aead_send; |
9932a29a | 2517 | INIT_LIST_HEAD(&sw_ctx_tx->tx_list); |
a42055e8 VG |
2518 | INIT_DELAYED_WORK(&sw_ctx_tx->tx_work.work, tx_work_handler); |
2519 | sw_ctx_tx->tx_work.sk = sk; | |
c46234eb | 2520 | } else { |
b190a587 | 2521 | crypto_init_wait(&sw_ctx_rx->async_wait); |
0cada332 | 2522 | spin_lock_init(&sw_ctx_rx->decrypt_compl_lock); |
4cbc325e | 2523 | init_waitqueue_head(&sw_ctx_rx->wq); |
86029d10 | 2524 | crypto_info = &ctx->crypto_recv.info; |
c46234eb | 2525 | cctx = &ctx->rx; |
692d7b5d | 2526 | skb_queue_head_init(&sw_ctx_rx->rx_list); |
c618db2a | 2527 | skb_queue_head_init(&sw_ctx_rx->async_hold); |
f66de3ee | 2528 | aead = &sw_ctx_rx->aead_recv; |
c46234eb DW |
2529 | } |
2530 | ||
3c4d7559 DW |
2531 | switch (crypto_info->cipher_type) { |
2532 | case TLS_CIPHER_AES_GCM_128: { | |
dc2724a6 TZ |
2533 | struct tls12_crypto_info_aes_gcm_128 *gcm_128_info; |
2534 | ||
2535 | gcm_128_info = (void *)crypto_info; | |
3c4d7559 DW |
2536 | nonce_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; |
2537 | tag_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
2538 | iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
dc2724a6 | 2539 | iv = gcm_128_info->iv; |
3c4d7559 | 2540 | rec_seq_size = TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE; |
dc2724a6 | 2541 | rec_seq = gcm_128_info->rec_seq; |
fb99bce7 DW |
2542 | keysize = TLS_CIPHER_AES_GCM_128_KEY_SIZE; |
2543 | key = gcm_128_info->key; | |
2544 | salt = gcm_128_info->salt; | |
f295b3ae VG |
2545 | salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE; |
2546 | cipher_name = "gcm(aes)"; | |
fb99bce7 DW |
2547 | break; |
2548 | } | |
2549 | case TLS_CIPHER_AES_GCM_256: { | |
dc2724a6 TZ |
2550 | struct tls12_crypto_info_aes_gcm_256 *gcm_256_info; |
2551 | ||
2552 | gcm_256_info = (void *)crypto_info; | |
fb99bce7 DW |
2553 | nonce_size = TLS_CIPHER_AES_GCM_256_IV_SIZE; |
2554 | tag_size = TLS_CIPHER_AES_GCM_256_TAG_SIZE; | |
2555 | iv_size = TLS_CIPHER_AES_GCM_256_IV_SIZE; | |
dc2724a6 | 2556 | iv = gcm_256_info->iv; |
fb99bce7 | 2557 | rec_seq_size = TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE; |
dc2724a6 | 2558 | rec_seq = gcm_256_info->rec_seq; |
fb99bce7 DW |
2559 | keysize = TLS_CIPHER_AES_GCM_256_KEY_SIZE; |
2560 | key = gcm_256_info->key; | |
2561 | salt = gcm_256_info->salt; | |
f295b3ae VG |
2562 | salt_size = TLS_CIPHER_AES_GCM_256_SALT_SIZE; |
2563 | cipher_name = "gcm(aes)"; | |
2564 | break; | |
2565 | } | |
2566 | case TLS_CIPHER_AES_CCM_128: { | |
dc2724a6 TZ |
2567 | struct tls12_crypto_info_aes_ccm_128 *ccm_128_info; |
2568 | ||
2569 | ccm_128_info = (void *)crypto_info; | |
f295b3ae VG |
2570 | nonce_size = TLS_CIPHER_AES_CCM_128_IV_SIZE; |
2571 | tag_size = TLS_CIPHER_AES_CCM_128_TAG_SIZE; | |
2572 | iv_size = TLS_CIPHER_AES_CCM_128_IV_SIZE; | |
dc2724a6 | 2573 | iv = ccm_128_info->iv; |
f295b3ae | 2574 | rec_seq_size = TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE; |
dc2724a6 | 2575 | rec_seq = ccm_128_info->rec_seq; |
f295b3ae VG |
2576 | keysize = TLS_CIPHER_AES_CCM_128_KEY_SIZE; |
2577 | key = ccm_128_info->key; | |
2578 | salt = ccm_128_info->salt; | |
2579 | salt_size = TLS_CIPHER_AES_CCM_128_SALT_SIZE; | |
2580 | cipher_name = "ccm(aes)"; | |
3c4d7559 DW |
2581 | break; |
2582 | } | |
74ea6106 | 2583 | case TLS_CIPHER_CHACHA20_POLY1305: { |
dc2724a6 TZ |
2584 | struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305_info; |
2585 | ||
74ea6106 VF |
2586 | chacha20_poly1305_info = (void *)crypto_info; |
2587 | nonce_size = 0; | |
2588 | tag_size = TLS_CIPHER_CHACHA20_POLY1305_TAG_SIZE; | |
2589 | iv_size = TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE; | |
2590 | iv = chacha20_poly1305_info->iv; | |
2591 | rec_seq_size = TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE; | |
2592 | rec_seq = chacha20_poly1305_info->rec_seq; | |
2593 | keysize = TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE; | |
2594 | key = chacha20_poly1305_info->key; | |
2595 | salt = chacha20_poly1305_info->salt; | |
2596 | salt_size = TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE; | |
2597 | cipher_name = "rfc7539(chacha20,poly1305)"; | |
2598 | break; | |
2599 | } | |
227b9644 TZ |
2600 | case TLS_CIPHER_SM4_GCM: { |
2601 | struct tls12_crypto_info_sm4_gcm *sm4_gcm_info; | |
2602 | ||
2603 | sm4_gcm_info = (void *)crypto_info; | |
2604 | nonce_size = TLS_CIPHER_SM4_GCM_IV_SIZE; | |
2605 | tag_size = TLS_CIPHER_SM4_GCM_TAG_SIZE; | |
2606 | iv_size = TLS_CIPHER_SM4_GCM_IV_SIZE; | |
2607 | iv = sm4_gcm_info->iv; | |
2608 | rec_seq_size = TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE; | |
2609 | rec_seq = sm4_gcm_info->rec_seq; | |
2610 | keysize = TLS_CIPHER_SM4_GCM_KEY_SIZE; | |
2611 | key = sm4_gcm_info->key; | |
2612 | salt = sm4_gcm_info->salt; | |
2613 | salt_size = TLS_CIPHER_SM4_GCM_SALT_SIZE; | |
2614 | cipher_name = "gcm(sm4)"; | |
2615 | break; | |
2616 | } | |
2617 | case TLS_CIPHER_SM4_CCM: { | |
2618 | struct tls12_crypto_info_sm4_ccm *sm4_ccm_info; | |
2619 | ||
2620 | sm4_ccm_info = (void *)crypto_info; | |
2621 | nonce_size = TLS_CIPHER_SM4_CCM_IV_SIZE; | |
2622 | tag_size = TLS_CIPHER_SM4_CCM_TAG_SIZE; | |
2623 | iv_size = TLS_CIPHER_SM4_CCM_IV_SIZE; | |
2624 | iv = sm4_ccm_info->iv; | |
2625 | rec_seq_size = TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE; | |
2626 | rec_seq = sm4_ccm_info->rec_seq; | |
2627 | keysize = TLS_CIPHER_SM4_CCM_KEY_SIZE; | |
2628 | key = sm4_ccm_info->key; | |
2629 | salt = sm4_ccm_info->salt; | |
2630 | salt_size = TLS_CIPHER_SM4_CCM_SALT_SIZE; | |
2631 | cipher_name = "ccm(sm4)"; | |
2632 | break; | |
2633 | } | |
62e56ef5 TY |
2634 | case TLS_CIPHER_ARIA_GCM_128: { |
2635 | struct tls12_crypto_info_aria_gcm_128 *aria_gcm_128_info; | |
2636 | ||
2637 | aria_gcm_128_info = (void *)crypto_info; | |
2638 | nonce_size = TLS_CIPHER_ARIA_GCM_128_IV_SIZE; | |
2639 | tag_size = TLS_CIPHER_ARIA_GCM_128_TAG_SIZE; | |
2640 | iv_size = TLS_CIPHER_ARIA_GCM_128_IV_SIZE; | |
2641 | iv = aria_gcm_128_info->iv; | |
2642 | rec_seq_size = TLS_CIPHER_ARIA_GCM_128_REC_SEQ_SIZE; | |
2643 | rec_seq = aria_gcm_128_info->rec_seq; | |
2644 | keysize = TLS_CIPHER_ARIA_GCM_128_KEY_SIZE; | |
2645 | key = aria_gcm_128_info->key; | |
2646 | salt = aria_gcm_128_info->salt; | |
2647 | salt_size = TLS_CIPHER_ARIA_GCM_128_SALT_SIZE; | |
2648 | cipher_name = "gcm(aria)"; | |
2649 | break; | |
2650 | } | |
2651 | case TLS_CIPHER_ARIA_GCM_256: { | |
2652 | struct tls12_crypto_info_aria_gcm_256 *gcm_256_info; | |
2653 | ||
2654 | gcm_256_info = (void *)crypto_info; | |
2655 | nonce_size = TLS_CIPHER_ARIA_GCM_256_IV_SIZE; | |
2656 | tag_size = TLS_CIPHER_ARIA_GCM_256_TAG_SIZE; | |
2657 | iv_size = TLS_CIPHER_ARIA_GCM_256_IV_SIZE; | |
2658 | iv = gcm_256_info->iv; | |
2659 | rec_seq_size = TLS_CIPHER_ARIA_GCM_256_REC_SEQ_SIZE; | |
2660 | rec_seq = gcm_256_info->rec_seq; | |
2661 | keysize = TLS_CIPHER_ARIA_GCM_256_KEY_SIZE; | |
2662 | key = gcm_256_info->key; | |
2663 | salt = gcm_256_info->salt; | |
2664 | salt_size = TLS_CIPHER_ARIA_GCM_256_SALT_SIZE; | |
2665 | cipher_name = "gcm(aria)"; | |
2666 | break; | |
2667 | } | |
3c4d7559 DW |
2668 | default: |
2669 | rc = -EINVAL; | |
cf6d43ef | 2670 | goto free_priv; |
3c4d7559 DW |
2671 | } |
2672 | ||
130b392c DW |
2673 | if (crypto_info->version == TLS_1_3_VERSION) { |
2674 | nonce_size = 0; | |
4509de14 VG |
2675 | prot->aad_size = TLS_HEADER_SIZE; |
2676 | prot->tail_size = 1; | |
130b392c | 2677 | } else { |
4509de14 VG |
2678 | prot->aad_size = TLS_AAD_SPACE_SIZE; |
2679 | prot->tail_size = 0; | |
130b392c DW |
2680 | } |
2681 | ||
50a07aa5 JK |
2682 | /* Sanity-check the sizes for stack allocations. */ |
2683 | if (iv_size > MAX_IV_SIZE || nonce_size > MAX_IV_SIZE || | |
2684 | rec_seq_size > TLS_MAX_REC_SEQ_SIZE || tag_size != TLS_TAG_SIZE || | |
2685 | prot->aad_size > TLS_MAX_AAD_SIZE) { | |
2686 | rc = -EINVAL; | |
2687 | goto free_priv; | |
2688 | } | |
2689 | ||
4509de14 VG |
2690 | prot->version = crypto_info->version; |
2691 | prot->cipher_type = crypto_info->cipher_type; | |
2692 | prot->prepend_size = TLS_HEADER_SIZE + nonce_size; | |
2693 | prot->tag_size = tag_size; | |
2694 | prot->overhead_size = prot->prepend_size + | |
2695 | prot->tag_size + prot->tail_size; | |
2696 | prot->iv_size = iv_size; | |
f295b3ae VG |
2697 | prot->salt_size = salt_size; |
2698 | cctx->iv = kmalloc(iv_size + salt_size, GFP_KERNEL); | |
c46234eb | 2699 | if (!cctx->iv) { |
3c4d7559 | 2700 | rc = -ENOMEM; |
cf6d43ef | 2701 | goto free_priv; |
3c4d7559 | 2702 | } |
fb99bce7 | 2703 | /* Note: 128 & 256 bit salt are the same size */ |
4509de14 | 2704 | prot->rec_seq_size = rec_seq_size; |
f295b3ae VG |
2705 | memcpy(cctx->iv, salt, salt_size); |
2706 | memcpy(cctx->iv + salt_size, iv, iv_size); | |
969d5090 | 2707 | cctx->rec_seq = kmemdup(rec_seq, rec_seq_size, GFP_KERNEL); |
c46234eb | 2708 | if (!cctx->rec_seq) { |
3c4d7559 DW |
2709 | rc = -ENOMEM; |
2710 | goto free_iv; | |
2711 | } | |
c46234eb | 2712 | |
c46234eb | 2713 | if (!*aead) { |
f295b3ae | 2714 | *aead = crypto_alloc_aead(cipher_name, 0, 0); |
c46234eb DW |
2715 | if (IS_ERR(*aead)) { |
2716 | rc = PTR_ERR(*aead); | |
2717 | *aead = NULL; | |
3c4d7559 DW |
2718 | goto free_rec_seq; |
2719 | } | |
2720 | } | |
2721 | ||
2722 | ctx->push_pending_record = tls_sw_push_pending_record; | |
2723 | ||
fb99bce7 DW |
2724 | rc = crypto_aead_setkey(*aead, key, keysize); |
2725 | ||
3c4d7559 DW |
2726 | if (rc) |
2727 | goto free_aead; | |
2728 | ||
4509de14 | 2729 | rc = crypto_aead_setauthsize(*aead, prot->tag_size); |
c46234eb DW |
2730 | if (rc) |
2731 | goto free_aead; | |
2732 | ||
f66de3ee | 2733 | if (sw_ctx_rx) { |
692d7b5d | 2734 | tfm = crypto_aead_tfm(sw_ctx_rx->aead_recv); |
8497ded2 | 2735 | |
88527790 JK |
2736 | tls_update_rx_zc_capable(ctx); |
2737 | sw_ctx_rx->async_capable = | |
2738 | crypto_info->version != TLS_1_3_VERSION && | |
2739 | !!(tfm->__crt_alg->cra_flags & CRYPTO_ALG_ASYNC); | |
692d7b5d | 2740 | |
849f16bb JK |
2741 | rc = tls_strp_init(&sw_ctx_rx->strp, sk); |
2742 | if (rc) | |
2743 | goto free_aead; | |
c46234eb DW |
2744 | } |
2745 | ||
2746 | goto out; | |
3c4d7559 DW |
2747 | |
2748 | free_aead: | |
c46234eb DW |
2749 | crypto_free_aead(*aead); |
2750 | *aead = NULL; | |
3c4d7559 | 2751 | free_rec_seq: |
c46234eb DW |
2752 | kfree(cctx->rec_seq); |
2753 | cctx->rec_seq = NULL; | |
3c4d7559 | 2754 | free_iv: |
f66de3ee BP |
2755 | kfree(cctx->iv); |
2756 | cctx->iv = NULL; | |
cf6d43ef | 2757 | free_priv: |
f66de3ee BP |
2758 | if (tx) { |
2759 | kfree(ctx->priv_ctx_tx); | |
2760 | ctx->priv_ctx_tx = NULL; | |
2761 | } else { | |
2762 | kfree(ctx->priv_ctx_rx); | |
2763 | ctx->priv_ctx_rx = NULL; | |
2764 | } | |
3c4d7559 DW |
2765 | out: |
2766 | return rc; | |
2767 | } |