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 | ||
da353fac DJ |
47 | noinline void tls_err_abort(struct sock *sk, int err) |
48 | { | |
49 | WARN_ON_ONCE(err >= 0); | |
50 | /* sk->sk_err should contain a positive error code. */ | |
51 | sk->sk_err = -err; | |
52 | sk_error_report(sk); | |
53 | } | |
54 | ||
0927f71d DRK |
55 | static int __skb_nsg(struct sk_buff *skb, int offset, int len, |
56 | unsigned int recursion_level) | |
57 | { | |
58 | int start = skb_headlen(skb); | |
59 | int i, chunk = start - offset; | |
60 | struct sk_buff *frag_iter; | |
61 | int elt = 0; | |
62 | ||
63 | if (unlikely(recursion_level >= 24)) | |
64 | return -EMSGSIZE; | |
65 | ||
66 | if (chunk > 0) { | |
67 | if (chunk > len) | |
68 | chunk = len; | |
69 | elt++; | |
70 | len -= chunk; | |
71 | if (len == 0) | |
72 | return elt; | |
73 | offset += chunk; | |
74 | } | |
75 | ||
76 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
77 | int end; | |
78 | ||
79 | WARN_ON(start > offset + len); | |
80 | ||
81 | end = start + skb_frag_size(&skb_shinfo(skb)->frags[i]); | |
82 | chunk = end - offset; | |
83 | if (chunk > 0) { | |
84 | if (chunk > len) | |
85 | chunk = len; | |
86 | elt++; | |
87 | len -= chunk; | |
88 | if (len == 0) | |
89 | return elt; | |
90 | offset += chunk; | |
91 | } | |
92 | start = end; | |
93 | } | |
94 | ||
95 | if (unlikely(skb_has_frag_list(skb))) { | |
96 | skb_walk_frags(skb, frag_iter) { | |
97 | int end, ret; | |
98 | ||
99 | WARN_ON(start > offset + len); | |
100 | ||
101 | end = start + frag_iter->len; | |
102 | chunk = end - offset; | |
103 | if (chunk > 0) { | |
104 | if (chunk > len) | |
105 | chunk = len; | |
106 | ret = __skb_nsg(frag_iter, offset - start, chunk, | |
107 | recursion_level + 1); | |
108 | if (unlikely(ret < 0)) | |
109 | return ret; | |
110 | elt += ret; | |
111 | len -= chunk; | |
112 | if (len == 0) | |
113 | return elt; | |
114 | offset += chunk; | |
115 | } | |
116 | start = end; | |
117 | } | |
118 | } | |
119 | BUG_ON(len); | |
120 | return elt; | |
121 | } | |
122 | ||
123 | /* Return the number of scatterlist elements required to completely map the | |
124 | * skb, or -EMSGSIZE if the recursion depth is exceeded. | |
125 | */ | |
126 | static int skb_nsg(struct sk_buff *skb, int offset, int len) | |
127 | { | |
128 | return __skb_nsg(skb, offset, len, 0); | |
129 | } | |
130 | ||
c3f6bb74 | 131 | static int padding_length(struct tls_prot_info *prot, struct sk_buff *skb) |
130b392c DW |
132 | { |
133 | struct strp_msg *rxm = strp_msg(skb); | |
c3f6bb74 | 134 | struct tls_msg *tlm = tls_msg(skb); |
130b392c DW |
135 | int sub = 0; |
136 | ||
137 | /* Determine zero-padding length */ | |
b53f4976 | 138 | if (prot->version == TLS_1_3_VERSION) { |
130b392c DW |
139 | char content_type = 0; |
140 | int err; | |
141 | int back = 17; | |
142 | ||
143 | while (content_type == 0) { | |
b53f4976 | 144 | if (back > rxm->full_len - prot->prepend_size) |
130b392c DW |
145 | return -EBADMSG; |
146 | err = skb_copy_bits(skb, | |
147 | rxm->offset + rxm->full_len - back, | |
148 | &content_type, 1); | |
b53f4976 JK |
149 | if (err) |
150 | return err; | |
130b392c DW |
151 | if (content_type) |
152 | break; | |
153 | sub++; | |
154 | back++; | |
155 | } | |
c3f6bb74 | 156 | tlm->control = content_type; |
130b392c DW |
157 | } |
158 | return sub; | |
159 | } | |
160 | ||
94524d8f VG |
161 | static void tls_decrypt_done(struct crypto_async_request *req, int err) |
162 | { | |
163 | struct aead_request *aead_req = (struct aead_request *)req; | |
94524d8f | 164 | struct scatterlist *sgout = aead_req->dst; |
692d7b5d | 165 | struct scatterlist *sgin = aead_req->src; |
7a3dd8c8 JF |
166 | struct tls_sw_context_rx *ctx; |
167 | struct tls_context *tls_ctx; | |
4509de14 | 168 | struct tls_prot_info *prot; |
94524d8f | 169 | struct scatterlist *sg; |
7a3dd8c8 | 170 | struct sk_buff *skb; |
94524d8f | 171 | unsigned int pages; |
7a3dd8c8 JF |
172 | int pending; |
173 | ||
174 | skb = (struct sk_buff *)req->data; | |
175 | tls_ctx = tls_get_ctx(skb->sk); | |
176 | ctx = tls_sw_ctx_rx(tls_ctx); | |
4509de14 | 177 | prot = &tls_ctx->prot_info; |
94524d8f VG |
178 | |
179 | /* Propagate if there was an err */ | |
180 | if (err) { | |
5c5ec668 JK |
181 | if (err == -EBADMSG) |
182 | TLS_INC_STATS(sock_net(skb->sk), | |
183 | LINUX_MIB_TLSDECRYPTERROR); | |
94524d8f | 184 | ctx->async_wait.err = err; |
7a3dd8c8 | 185 | tls_err_abort(skb->sk, err); |
692d7b5d VG |
186 | } else { |
187 | struct strp_msg *rxm = strp_msg(skb); | |
b53f4976 JK |
188 | int pad; |
189 | ||
c3f6bb74 | 190 | pad = padding_length(prot, skb); |
b53f4976 JK |
191 | if (pad < 0) { |
192 | ctx->async_wait.err = pad; | |
193 | tls_err_abort(skb->sk, pad); | |
194 | } else { | |
195 | rxm->full_len -= pad; | |
196 | rxm->offset += prot->prepend_size; | |
197 | rxm->full_len -= prot->overhead_size; | |
198 | } | |
94524d8f VG |
199 | } |
200 | ||
7a3dd8c8 JF |
201 | /* After using skb->sk to propagate sk through crypto async callback |
202 | * we need to NULL it again. | |
203 | */ | |
204 | skb->sk = NULL; | |
205 | ||
94524d8f | 206 | |
692d7b5d VG |
207 | /* Free the destination pages if skb was not decrypted inplace */ |
208 | if (sgout != sgin) { | |
209 | /* Skip the first S/G entry as it points to AAD */ | |
210 | for_each_sg(sg_next(sgout), sg, UINT_MAX, pages) { | |
211 | if (!sg) | |
212 | break; | |
213 | put_page(sg_page(sg)); | |
214 | } | |
94524d8f VG |
215 | } |
216 | ||
217 | kfree(aead_req); | |
218 | ||
0cada332 | 219 | spin_lock_bh(&ctx->decrypt_compl_lock); |
692d7b5d VG |
220 | pending = atomic_dec_return(&ctx->decrypt_pending); |
221 | ||
0cada332 | 222 | if (!pending && ctx->async_notify) |
94524d8f | 223 | complete(&ctx->async_wait.completion); |
0cada332 | 224 | spin_unlock_bh(&ctx->decrypt_compl_lock); |
94524d8f VG |
225 | } |
226 | ||
c46234eb | 227 | static int tls_do_decryption(struct sock *sk, |
94524d8f | 228 | struct sk_buff *skb, |
c46234eb DW |
229 | struct scatterlist *sgin, |
230 | struct scatterlist *sgout, | |
231 | char *iv_recv, | |
232 | size_t data_len, | |
94524d8f VG |
233 | struct aead_request *aead_req, |
234 | bool async) | |
c46234eb DW |
235 | { |
236 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 237 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 238 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 239 | int ret; |
c46234eb | 240 | |
0b243d00 | 241 | aead_request_set_tfm(aead_req, ctx->aead_recv); |
4509de14 | 242 | aead_request_set_ad(aead_req, prot->aad_size); |
c46234eb | 243 | aead_request_set_crypt(aead_req, sgin, sgout, |
4509de14 | 244 | data_len + prot->tag_size, |
c46234eb | 245 | (u8 *)iv_recv); |
c46234eb | 246 | |
94524d8f | 247 | if (async) { |
7a3dd8c8 JF |
248 | /* Using skb->sk to push sk through to crypto async callback |
249 | * handler. This allows propagating errors up to the socket | |
250 | * if needed. It _must_ be cleared in the async handler | |
a88c26f6 | 251 | * before consume_skb is called. We _know_ skb->sk is NULL |
7a3dd8c8 JF |
252 | * because it is a clone from strparser. |
253 | */ | |
254 | skb->sk = sk; | |
94524d8f VG |
255 | aead_request_set_callback(aead_req, |
256 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
257 | tls_decrypt_done, skb); | |
258 | atomic_inc(&ctx->decrypt_pending); | |
259 | } else { | |
260 | aead_request_set_callback(aead_req, | |
261 | CRYPTO_TFM_REQ_MAY_BACKLOG, | |
262 | crypto_req_done, &ctx->async_wait); | |
263 | } | |
264 | ||
265 | ret = crypto_aead_decrypt(aead_req); | |
266 | if (ret == -EINPROGRESS) { | |
267 | if (async) | |
268 | return ret; | |
269 | ||
270 | ret = crypto_wait_req(ret, &ctx->async_wait); | |
271 | } | |
272 | ||
273 | if (async) | |
274 | atomic_dec(&ctx->decrypt_pending); | |
275 | ||
c46234eb DW |
276 | return ret; |
277 | } | |
278 | ||
d829e9c4 | 279 | static void tls_trim_both_msgs(struct sock *sk, int target_size) |
3c4d7559 DW |
280 | { |
281 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 282 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 283 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 284 | struct tls_rec *rec = ctx->open_rec; |
3c4d7559 | 285 | |
d829e9c4 | 286 | sk_msg_trim(sk, &rec->msg_plaintext, target_size); |
3c4d7559 | 287 | if (target_size > 0) |
4509de14 | 288 | target_size += prot->overhead_size; |
d829e9c4 | 289 | sk_msg_trim(sk, &rec->msg_encrypted, target_size); |
3c4d7559 DW |
290 | } |
291 | ||
d829e9c4 | 292 | static int tls_alloc_encrypted_msg(struct sock *sk, int len) |
3c4d7559 DW |
293 | { |
294 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 295 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 296 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 | 297 | struct sk_msg *msg_en = &rec->msg_encrypted; |
3c4d7559 | 298 | |
d829e9c4 | 299 | return sk_msg_alloc(sk, msg_en, len, 0); |
3c4d7559 DW |
300 | } |
301 | ||
d829e9c4 | 302 | static int tls_clone_plaintext_msg(struct sock *sk, int required) |
3c4d7559 DW |
303 | { |
304 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 305 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 306 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 307 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
308 | struct sk_msg *msg_pl = &rec->msg_plaintext; |
309 | struct sk_msg *msg_en = &rec->msg_encrypted; | |
4e6d4720 | 310 | int skip, len; |
3c4d7559 | 311 | |
d829e9c4 DB |
312 | /* We add page references worth len bytes from encrypted sg |
313 | * at the end of plaintext sg. It is guaranteed that msg_en | |
4e6d4720 VG |
314 | * has enough required room (ensured by caller). |
315 | */ | |
d829e9c4 | 316 | len = required - msg_pl->sg.size; |
52ea992c | 317 | |
d829e9c4 DB |
318 | /* Skip initial bytes in msg_en's data to be able to use |
319 | * same offset of both plain and encrypted data. | |
4e6d4720 | 320 | */ |
4509de14 | 321 | skip = prot->prepend_size + msg_pl->sg.size; |
4e6d4720 | 322 | |
d829e9c4 | 323 | return sk_msg_clone(sk, msg_pl, msg_en, skip, len); |
3c4d7559 DW |
324 | } |
325 | ||
d3b18ad3 | 326 | static struct tls_rec *tls_get_rec(struct sock *sk) |
3c4d7559 DW |
327 | { |
328 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 329 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 330 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
331 | struct sk_msg *msg_pl, *msg_en; |
332 | struct tls_rec *rec; | |
333 | int mem_size; | |
3c4d7559 | 334 | |
d3b18ad3 JF |
335 | mem_size = sizeof(struct tls_rec) + crypto_aead_reqsize(ctx->aead_send); |
336 | ||
337 | rec = kzalloc(mem_size, sk->sk_allocation); | |
a42055e8 | 338 | if (!rec) |
d3b18ad3 JF |
339 | return NULL; |
340 | ||
341 | msg_pl = &rec->msg_plaintext; | |
342 | msg_en = &rec->msg_encrypted; | |
343 | ||
344 | sk_msg_init(msg_pl); | |
345 | sk_msg_init(msg_en); | |
346 | ||
347 | sg_init_table(rec->sg_aead_in, 2); | |
4509de14 | 348 | sg_set_buf(&rec->sg_aead_in[0], rec->aad_space, prot->aad_size); |
d3b18ad3 JF |
349 | sg_unmark_end(&rec->sg_aead_in[1]); |
350 | ||
351 | sg_init_table(rec->sg_aead_out, 2); | |
4509de14 | 352 | sg_set_buf(&rec->sg_aead_out[0], rec->aad_space, prot->aad_size); |
d3b18ad3 JF |
353 | sg_unmark_end(&rec->sg_aead_out[1]); |
354 | ||
355 | return rec; | |
356 | } | |
a42055e8 | 357 | |
d3b18ad3 JF |
358 | static void tls_free_rec(struct sock *sk, struct tls_rec *rec) |
359 | { | |
d829e9c4 DB |
360 | sk_msg_free(sk, &rec->msg_encrypted); |
361 | sk_msg_free(sk, &rec->msg_plaintext); | |
c774973e | 362 | kfree(rec); |
a42055e8 VG |
363 | } |
364 | ||
d3b18ad3 JF |
365 | static void tls_free_open_rec(struct sock *sk) |
366 | { | |
367 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
368 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
369 | struct tls_rec *rec = ctx->open_rec; | |
370 | ||
371 | if (rec) { | |
372 | tls_free_rec(sk, rec); | |
373 | ctx->open_rec = NULL; | |
374 | } | |
375 | } | |
376 | ||
a42055e8 VG |
377 | int tls_tx_records(struct sock *sk, int flags) |
378 | { | |
379 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
380 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
381 | struct tls_rec *rec, *tmp; | |
d829e9c4 | 382 | struct sk_msg *msg_en; |
a42055e8 VG |
383 | int tx_flags, rc = 0; |
384 | ||
385 | if (tls_is_partially_sent_record(tls_ctx)) { | |
9932a29a | 386 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
387 | struct tls_rec, list); |
388 | ||
389 | if (flags == -1) | |
390 | tx_flags = rec->tx_flags; | |
391 | else | |
392 | tx_flags = flags; | |
393 | ||
394 | rc = tls_push_partial_record(sk, tls_ctx, tx_flags); | |
395 | if (rc) | |
396 | goto tx_err; | |
397 | ||
398 | /* Full record has been transmitted. | |
9932a29a | 399 | * Remove the head of tx_list |
a42055e8 | 400 | */ |
a42055e8 | 401 | list_del(&rec->list); |
d829e9c4 | 402 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
403 | kfree(rec); |
404 | } | |
405 | ||
9932a29a VG |
406 | /* Tx all ready records */ |
407 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { | |
408 | if (READ_ONCE(rec->tx_ready)) { | |
a42055e8 VG |
409 | if (flags == -1) |
410 | tx_flags = rec->tx_flags; | |
411 | else | |
412 | tx_flags = flags; | |
413 | ||
d829e9c4 | 414 | msg_en = &rec->msg_encrypted; |
a42055e8 | 415 | rc = tls_push_sg(sk, tls_ctx, |
d829e9c4 | 416 | &msg_en->sg.data[msg_en->sg.curr], |
a42055e8 VG |
417 | 0, tx_flags); |
418 | if (rc) | |
419 | goto tx_err; | |
420 | ||
a42055e8 | 421 | list_del(&rec->list); |
d829e9c4 | 422 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
423 | kfree(rec); |
424 | } else { | |
425 | break; | |
426 | } | |
427 | } | |
428 | ||
429 | tx_err: | |
430 | if (rc < 0 && rc != -EAGAIN) | |
da353fac | 431 | tls_err_abort(sk, -EBADMSG); |
a42055e8 VG |
432 | |
433 | return rc; | |
434 | } | |
435 | ||
436 | static void tls_encrypt_done(struct crypto_async_request *req, int err) | |
437 | { | |
438 | struct aead_request *aead_req = (struct aead_request *)req; | |
439 | struct sock *sk = req->data; | |
440 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 441 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 442 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d829e9c4 DB |
443 | struct scatterlist *sge; |
444 | struct sk_msg *msg_en; | |
a42055e8 VG |
445 | struct tls_rec *rec; |
446 | bool ready = false; | |
447 | int pending; | |
448 | ||
449 | rec = container_of(aead_req, struct tls_rec, aead_req); | |
d829e9c4 | 450 | msg_en = &rec->msg_encrypted; |
a42055e8 | 451 | |
d829e9c4 | 452 | sge = sk_msg_elem(msg_en, msg_en->sg.curr); |
4509de14 VG |
453 | sge->offset -= prot->prepend_size; |
454 | sge->length += prot->prepend_size; | |
a42055e8 | 455 | |
80ece6a0 | 456 | /* Check if error is previously set on socket */ |
a42055e8 | 457 | if (err || sk->sk_err) { |
a42055e8 VG |
458 | rec = NULL; |
459 | ||
460 | /* If err is already set on socket, return the same code */ | |
461 | if (sk->sk_err) { | |
1d9d6fd2 | 462 | ctx->async_wait.err = -sk->sk_err; |
a42055e8 VG |
463 | } else { |
464 | ctx->async_wait.err = err; | |
465 | tls_err_abort(sk, err); | |
466 | } | |
467 | } | |
468 | ||
9932a29a VG |
469 | if (rec) { |
470 | struct tls_rec *first_rec; | |
471 | ||
472 | /* Mark the record as ready for transmission */ | |
473 | smp_store_mb(rec->tx_ready, true); | |
474 | ||
475 | /* If received record is at head of tx_list, schedule tx */ | |
476 | first_rec = list_first_entry(&ctx->tx_list, | |
477 | struct tls_rec, list); | |
478 | if (rec == first_rec) | |
479 | ready = true; | |
480 | } | |
a42055e8 | 481 | |
0cada332 | 482 | spin_lock_bh(&ctx->encrypt_compl_lock); |
a42055e8 VG |
483 | pending = atomic_dec_return(&ctx->encrypt_pending); |
484 | ||
0cada332 | 485 | if (!pending && ctx->async_notify) |
a42055e8 | 486 | complete(&ctx->async_wait.completion); |
0cada332 | 487 | spin_unlock_bh(&ctx->encrypt_compl_lock); |
a42055e8 VG |
488 | |
489 | if (!ready) | |
490 | return; | |
491 | ||
492 | /* Schedule the transmission */ | |
493 | if (!test_and_set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
d829e9c4 | 494 | schedule_delayed_work(&ctx->tx_work.work, 1); |
3c4d7559 DW |
495 | } |
496 | ||
a42055e8 VG |
497 | static int tls_do_encryption(struct sock *sk, |
498 | struct tls_context *tls_ctx, | |
a447da7d DB |
499 | struct tls_sw_context_tx *ctx, |
500 | struct aead_request *aead_req, | |
d829e9c4 | 501 | size_t data_len, u32 start) |
3c4d7559 | 502 | { |
4509de14 | 503 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 504 | struct tls_rec *rec = ctx->open_rec; |
d829e9c4 DB |
505 | struct sk_msg *msg_en = &rec->msg_encrypted; |
506 | struct scatterlist *sge = sk_msg_elem(msg_en, start); | |
f295b3ae VG |
507 | int rc, iv_offset = 0; |
508 | ||
509 | /* For CCM based ciphers, first byte of IV is a constant */ | |
128cfb88 TZ |
510 | switch (prot->cipher_type) { |
511 | case TLS_CIPHER_AES_CCM_128: | |
f295b3ae VG |
512 | rec->iv_data[0] = TLS_AES_CCM_IV_B0_BYTE; |
513 | iv_offset = 1; | |
128cfb88 TZ |
514 | break; |
515 | case TLS_CIPHER_SM4_CCM: | |
516 | rec->iv_data[0] = TLS_SM4_CCM_IV_B0_BYTE; | |
517 | iv_offset = 1; | |
518 | break; | |
f295b3ae VG |
519 | } |
520 | ||
521 | memcpy(&rec->iv_data[iv_offset], tls_ctx->tx.iv, | |
522 | prot->iv_size + prot->salt_size); | |
3c4d7559 | 523 | |
59610606 | 524 | xor_iv_with_seq(prot, rec->iv_data + iv_offset, tls_ctx->tx.rec_seq); |
32eb67b9 | 525 | |
4509de14 VG |
526 | sge->offset += prot->prepend_size; |
527 | sge->length -= prot->prepend_size; | |
3c4d7559 | 528 | |
d829e9c4 | 529 | msg_en->sg.curr = start; |
4e6d4720 | 530 | |
3c4d7559 | 531 | aead_request_set_tfm(aead_req, ctx->aead_send); |
4509de14 | 532 | aead_request_set_ad(aead_req, prot->aad_size); |
d829e9c4 DB |
533 | aead_request_set_crypt(aead_req, rec->sg_aead_in, |
534 | rec->sg_aead_out, | |
32eb67b9 | 535 | data_len, rec->iv_data); |
a54667f6 VG |
536 | |
537 | aead_request_set_callback(aead_req, CRYPTO_TFM_REQ_MAY_BACKLOG, | |
a42055e8 VG |
538 | tls_encrypt_done, sk); |
539 | ||
9932a29a VG |
540 | /* Add the record in tx_list */ |
541 | list_add_tail((struct list_head *)&rec->list, &ctx->tx_list); | |
a42055e8 | 542 | atomic_inc(&ctx->encrypt_pending); |
a54667f6 | 543 | |
a42055e8 VG |
544 | rc = crypto_aead_encrypt(aead_req); |
545 | if (!rc || rc != -EINPROGRESS) { | |
546 | atomic_dec(&ctx->encrypt_pending); | |
4509de14 VG |
547 | sge->offset -= prot->prepend_size; |
548 | sge->length += prot->prepend_size; | |
a42055e8 | 549 | } |
3c4d7559 | 550 | |
9932a29a VG |
551 | if (!rc) { |
552 | WRITE_ONCE(rec->tx_ready, true); | |
553 | } else if (rc != -EINPROGRESS) { | |
554 | list_del(&rec->list); | |
a42055e8 | 555 | return rc; |
9932a29a | 556 | } |
3c4d7559 | 557 | |
a42055e8 VG |
558 | /* Unhook the record from context if encryption is not failure */ |
559 | ctx->open_rec = NULL; | |
fb0f886f | 560 | tls_advance_record_sn(sk, prot, &tls_ctx->tx); |
3c4d7559 DW |
561 | return rc; |
562 | } | |
563 | ||
d3b18ad3 JF |
564 | static int tls_split_open_record(struct sock *sk, struct tls_rec *from, |
565 | struct tls_rec **to, struct sk_msg *msg_opl, | |
566 | struct sk_msg *msg_oen, u32 split_point, | |
567 | u32 tx_overhead_size, u32 *orig_end) | |
568 | { | |
569 | u32 i, j, bytes = 0, apply = msg_opl->apply_bytes; | |
570 | struct scatterlist *sge, *osge, *nsge; | |
571 | u32 orig_size = msg_opl->sg.size; | |
572 | struct scatterlist tmp = { }; | |
573 | struct sk_msg *msg_npl; | |
574 | struct tls_rec *new; | |
575 | int ret; | |
576 | ||
577 | new = tls_get_rec(sk); | |
578 | if (!new) | |
579 | return -ENOMEM; | |
580 | ret = sk_msg_alloc(sk, &new->msg_encrypted, msg_opl->sg.size + | |
581 | tx_overhead_size, 0); | |
582 | if (ret < 0) { | |
583 | tls_free_rec(sk, new); | |
584 | return ret; | |
585 | } | |
586 | ||
587 | *orig_end = msg_opl->sg.end; | |
588 | i = msg_opl->sg.start; | |
589 | sge = sk_msg_elem(msg_opl, i); | |
590 | while (apply && sge->length) { | |
591 | if (sge->length > apply) { | |
592 | u32 len = sge->length - apply; | |
593 | ||
594 | get_page(sg_page(sge)); | |
595 | sg_set_page(&tmp, sg_page(sge), len, | |
596 | sge->offset + apply); | |
597 | sge->length = apply; | |
598 | bytes += apply; | |
599 | apply = 0; | |
600 | } else { | |
601 | apply -= sge->length; | |
602 | bytes += sge->length; | |
603 | } | |
604 | ||
605 | sk_msg_iter_var_next(i); | |
606 | if (i == msg_opl->sg.end) | |
607 | break; | |
608 | sge = sk_msg_elem(msg_opl, i); | |
609 | } | |
610 | ||
611 | msg_opl->sg.end = i; | |
612 | msg_opl->sg.curr = i; | |
613 | msg_opl->sg.copybreak = 0; | |
614 | msg_opl->apply_bytes = 0; | |
615 | msg_opl->sg.size = bytes; | |
616 | ||
617 | msg_npl = &new->msg_plaintext; | |
618 | msg_npl->apply_bytes = apply; | |
619 | msg_npl->sg.size = orig_size - bytes; | |
620 | ||
621 | j = msg_npl->sg.start; | |
622 | nsge = sk_msg_elem(msg_npl, j); | |
623 | if (tmp.length) { | |
624 | memcpy(nsge, &tmp, sizeof(*nsge)); | |
625 | sk_msg_iter_var_next(j); | |
626 | nsge = sk_msg_elem(msg_npl, j); | |
627 | } | |
628 | ||
629 | osge = sk_msg_elem(msg_opl, i); | |
630 | while (osge->length) { | |
631 | memcpy(nsge, osge, sizeof(*nsge)); | |
632 | sg_unmark_end(nsge); | |
633 | sk_msg_iter_var_next(i); | |
634 | sk_msg_iter_var_next(j); | |
635 | if (i == *orig_end) | |
636 | break; | |
637 | osge = sk_msg_elem(msg_opl, i); | |
638 | nsge = sk_msg_elem(msg_npl, j); | |
639 | } | |
640 | ||
641 | msg_npl->sg.end = j; | |
642 | msg_npl->sg.curr = j; | |
643 | msg_npl->sg.copybreak = 0; | |
644 | ||
645 | *to = new; | |
646 | return 0; | |
647 | } | |
648 | ||
649 | static void tls_merge_open_record(struct sock *sk, struct tls_rec *to, | |
650 | struct tls_rec *from, u32 orig_end) | |
651 | { | |
652 | struct sk_msg *msg_npl = &from->msg_plaintext; | |
653 | struct sk_msg *msg_opl = &to->msg_plaintext; | |
654 | struct scatterlist *osge, *nsge; | |
655 | u32 i, j; | |
656 | ||
657 | i = msg_opl->sg.end; | |
658 | sk_msg_iter_var_prev(i); | |
659 | j = msg_npl->sg.start; | |
660 | ||
661 | osge = sk_msg_elem(msg_opl, i); | |
662 | nsge = sk_msg_elem(msg_npl, j); | |
663 | ||
664 | if (sg_page(osge) == sg_page(nsge) && | |
665 | osge->offset + osge->length == nsge->offset) { | |
666 | osge->length += nsge->length; | |
667 | put_page(sg_page(nsge)); | |
668 | } | |
669 | ||
670 | msg_opl->sg.end = orig_end; | |
671 | msg_opl->sg.curr = orig_end; | |
672 | msg_opl->sg.copybreak = 0; | |
673 | msg_opl->apply_bytes = msg_opl->sg.size + msg_npl->sg.size; | |
674 | msg_opl->sg.size += msg_npl->sg.size; | |
675 | ||
676 | sk_msg_free(sk, &to->msg_encrypted); | |
677 | sk_msg_xfer_full(&to->msg_encrypted, &from->msg_encrypted); | |
678 | ||
679 | kfree(from); | |
680 | } | |
681 | ||
3c4d7559 DW |
682 | static int tls_push_record(struct sock *sk, int flags, |
683 | unsigned char record_type) | |
684 | { | |
685 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
4509de14 | 686 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
f66de3ee | 687 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 | 688 | struct tls_rec *rec = ctx->open_rec, *tmp = NULL; |
3f649ab7 | 689 | u32 i, split_point, orig_end; |
d829e9c4 | 690 | struct sk_msg *msg_pl, *msg_en; |
a447da7d | 691 | struct aead_request *req; |
d3b18ad3 | 692 | bool split; |
3c4d7559 DW |
693 | int rc; |
694 | ||
a42055e8 VG |
695 | if (!rec) |
696 | return 0; | |
a447da7d | 697 | |
d829e9c4 DB |
698 | msg_pl = &rec->msg_plaintext; |
699 | msg_en = &rec->msg_encrypted; | |
700 | ||
d3b18ad3 JF |
701 | split_point = msg_pl->apply_bytes; |
702 | split = split_point && split_point < msg_pl->sg.size; | |
d468e477 JF |
703 | if (unlikely((!split && |
704 | msg_pl->sg.size + | |
705 | prot->overhead_size > msg_en->sg.size) || | |
706 | (split && | |
707 | split_point + | |
708 | prot->overhead_size > msg_en->sg.size))) { | |
709 | split = true; | |
710 | split_point = msg_en->sg.size; | |
711 | } | |
d3b18ad3 JF |
712 | if (split) { |
713 | rc = tls_split_open_record(sk, rec, &tmp, msg_pl, msg_en, | |
4509de14 | 714 | split_point, prot->overhead_size, |
d3b18ad3 JF |
715 | &orig_end); |
716 | if (rc < 0) | |
717 | return rc; | |
d468e477 JF |
718 | /* This can happen if above tls_split_open_record allocates |
719 | * a single large encryption buffer instead of two smaller | |
720 | * ones. In this case adjust pointers and continue without | |
721 | * split. | |
722 | */ | |
723 | if (!msg_pl->sg.size) { | |
724 | tls_merge_open_record(sk, rec, tmp, orig_end); | |
725 | msg_pl = &rec->msg_plaintext; | |
726 | msg_en = &rec->msg_encrypted; | |
727 | split = false; | |
728 | } | |
d3b18ad3 | 729 | sk_msg_trim(sk, msg_en, msg_pl->sg.size + |
4509de14 | 730 | prot->overhead_size); |
d3b18ad3 JF |
731 | } |
732 | ||
a42055e8 VG |
733 | rec->tx_flags = flags; |
734 | req = &rec->aead_req; | |
3c4d7559 | 735 | |
d829e9c4 DB |
736 | i = msg_pl->sg.end; |
737 | sk_msg_iter_var_prev(i); | |
130b392c DW |
738 | |
739 | rec->content_type = record_type; | |
4509de14 | 740 | if (prot->version == TLS_1_3_VERSION) { |
130b392c DW |
741 | /* Add content type to end of message. No padding added */ |
742 | sg_set_buf(&rec->sg_content_type, &rec->content_type, 1); | |
743 | sg_mark_end(&rec->sg_content_type); | |
744 | sg_chain(msg_pl->sg.data, msg_pl->sg.end + 1, | |
745 | &rec->sg_content_type); | |
746 | } else { | |
747 | sg_mark_end(sk_msg_elem(msg_pl, i)); | |
748 | } | |
a42055e8 | 749 | |
9aaaa568 JF |
750 | if (msg_pl->sg.end < msg_pl->sg.start) { |
751 | sg_chain(&msg_pl->sg.data[msg_pl->sg.start], | |
752 | MAX_SKB_FRAGS - msg_pl->sg.start + 1, | |
753 | msg_pl->sg.data); | |
754 | } | |
755 | ||
d829e9c4 | 756 | i = msg_pl->sg.start; |
9e5ffed3 | 757 | sg_chain(rec->sg_aead_in, 2, &msg_pl->sg.data[i]); |
d829e9c4 DB |
758 | |
759 | i = msg_en->sg.end; | |
760 | sk_msg_iter_var_prev(i); | |
761 | sg_mark_end(sk_msg_elem(msg_en, i)); | |
762 | ||
763 | i = msg_en->sg.start; | |
764 | sg_chain(rec->sg_aead_out, 2, &msg_en->sg.data[i]); | |
765 | ||
4509de14 | 766 | tls_make_aad(rec->aad_space, msg_pl->sg.size + prot->tail_size, |
6942a284 | 767 | tls_ctx->tx.rec_seq, record_type, prot); |
3c4d7559 DW |
768 | |
769 | tls_fill_prepend(tls_ctx, | |
d829e9c4 | 770 | page_address(sg_page(&msg_en->sg.data[i])) + |
130b392c | 771 | msg_en->sg.data[i].offset, |
4509de14 | 772 | msg_pl->sg.size + prot->tail_size, |
6942a284 | 773 | record_type); |
3c4d7559 | 774 | |
d829e9c4 | 775 | tls_ctx->pending_open_record_frags = false; |
3c4d7559 | 776 | |
130b392c | 777 | rc = tls_do_encryption(sk, tls_ctx, ctx, req, |
4509de14 | 778 | msg_pl->sg.size + prot->tail_size, i); |
a42055e8 | 779 | if (rc < 0) { |
d3b18ad3 | 780 | if (rc != -EINPROGRESS) { |
da353fac | 781 | tls_err_abort(sk, -EBADMSG); |
d3b18ad3 JF |
782 | if (split) { |
783 | tls_ctx->pending_open_record_frags = true; | |
784 | tls_merge_open_record(sk, rec, tmp, orig_end); | |
785 | } | |
786 | } | |
5b053e12 | 787 | ctx->async_capable = 1; |
a42055e8 | 788 | return rc; |
d3b18ad3 JF |
789 | } else if (split) { |
790 | msg_pl = &tmp->msg_plaintext; | |
791 | msg_en = &tmp->msg_encrypted; | |
4509de14 | 792 | sk_msg_trim(sk, msg_en, msg_pl->sg.size + prot->overhead_size); |
d3b18ad3 JF |
793 | tls_ctx->pending_open_record_frags = true; |
794 | ctx->open_rec = tmp; | |
a42055e8 | 795 | } |
3c4d7559 | 796 | |
9932a29a | 797 | return tls_tx_records(sk, flags); |
3c4d7559 DW |
798 | } |
799 | ||
d3b18ad3 JF |
800 | static int bpf_exec_tx_verdict(struct sk_msg *msg, struct sock *sk, |
801 | bool full_record, u8 record_type, | |
a7bff11f | 802 | ssize_t *copied, int flags) |
3c4d7559 DW |
803 | { |
804 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 805 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
d3b18ad3 JF |
806 | struct sk_msg msg_redir = { }; |
807 | struct sk_psock *psock; | |
808 | struct sock *sk_redir; | |
a42055e8 | 809 | struct tls_rec *rec; |
0608c69c | 810 | bool enospc, policy; |
d3b18ad3 | 811 | int err = 0, send; |
7246d8ed | 812 | u32 delta = 0; |
d3b18ad3 | 813 | |
0608c69c | 814 | policy = !(flags & MSG_SENDPAGE_NOPOLICY); |
d3b18ad3 | 815 | psock = sk_psock_get(sk); |
d10523d0 JK |
816 | if (!psock || !policy) { |
817 | err = tls_push_record(sk, flags, record_type); | |
635d9398 | 818 | if (err && sk->sk_err == EBADMSG) { |
d10523d0 JK |
819 | *copied -= sk_msg_free(sk, msg); |
820 | tls_free_open_rec(sk); | |
635d9398 | 821 | err = -sk->sk_err; |
d10523d0 | 822 | } |
095f5614 XY |
823 | if (psock) |
824 | sk_psock_put(sk, psock); | |
d10523d0 JK |
825 | return err; |
826 | } | |
d3b18ad3 JF |
827 | more_data: |
828 | enospc = sk_msg_full(msg); | |
7246d8ed JF |
829 | if (psock->eval == __SK_NONE) { |
830 | delta = msg->sg.size; | |
d3b18ad3 | 831 | psock->eval = sk_psock_msg_verdict(sk, psock, msg); |
7361d448 | 832 | delta -= msg->sg.size; |
7246d8ed | 833 | } |
d3b18ad3 JF |
834 | if (msg->cork_bytes && msg->cork_bytes > msg->sg.size && |
835 | !enospc && !full_record) { | |
836 | err = -ENOSPC; | |
837 | goto out_err; | |
838 | } | |
839 | msg->cork_bytes = 0; | |
840 | send = msg->sg.size; | |
841 | if (msg->apply_bytes && msg->apply_bytes < send) | |
842 | send = msg->apply_bytes; | |
843 | ||
844 | switch (psock->eval) { | |
845 | case __SK_PASS: | |
846 | err = tls_push_record(sk, flags, record_type); | |
635d9398 | 847 | if (err && sk->sk_err == EBADMSG) { |
d3b18ad3 JF |
848 | *copied -= sk_msg_free(sk, msg); |
849 | tls_free_open_rec(sk); | |
635d9398 | 850 | err = -sk->sk_err; |
d3b18ad3 JF |
851 | goto out_err; |
852 | } | |
853 | break; | |
854 | case __SK_REDIRECT: | |
855 | sk_redir = psock->sk_redir; | |
856 | memcpy(&msg_redir, msg, sizeof(*msg)); | |
857 | if (msg->apply_bytes < send) | |
858 | msg->apply_bytes = 0; | |
859 | else | |
860 | msg->apply_bytes -= send; | |
861 | sk_msg_return_zero(sk, msg, send); | |
862 | msg->sg.size -= send; | |
863 | release_sock(sk); | |
864 | err = tcp_bpf_sendmsg_redir(sk_redir, &msg_redir, send, flags); | |
865 | lock_sock(sk); | |
866 | if (err < 0) { | |
867 | *copied -= sk_msg_free_nocharge(sk, &msg_redir); | |
868 | msg->sg.size = 0; | |
869 | } | |
870 | if (msg->sg.size == 0) | |
871 | tls_free_open_rec(sk); | |
872 | break; | |
873 | case __SK_DROP: | |
874 | default: | |
875 | sk_msg_free_partial(sk, msg, send); | |
876 | if (msg->apply_bytes < send) | |
877 | msg->apply_bytes = 0; | |
878 | else | |
879 | msg->apply_bytes -= send; | |
880 | if (msg->sg.size == 0) | |
881 | tls_free_open_rec(sk); | |
7246d8ed | 882 | *copied -= (send + delta); |
d3b18ad3 JF |
883 | err = -EACCES; |
884 | } | |
a42055e8 | 885 | |
d3b18ad3 JF |
886 | if (likely(!err)) { |
887 | bool reset_eval = !ctx->open_rec; | |
a42055e8 | 888 | |
d3b18ad3 JF |
889 | rec = ctx->open_rec; |
890 | if (rec) { | |
891 | msg = &rec->msg_plaintext; | |
892 | if (!msg->apply_bytes) | |
893 | reset_eval = true; | |
894 | } | |
895 | if (reset_eval) { | |
896 | psock->eval = __SK_NONE; | |
897 | if (psock->sk_redir) { | |
898 | sock_put(psock->sk_redir); | |
899 | psock->sk_redir = NULL; | |
900 | } | |
901 | } | |
902 | if (rec) | |
903 | goto more_data; | |
904 | } | |
905 | out_err: | |
906 | sk_psock_put(sk, psock); | |
907 | return err; | |
908 | } | |
909 | ||
910 | static int tls_sw_push_pending_record(struct sock *sk, int flags) | |
911 | { | |
912 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
913 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
914 | struct tls_rec *rec = ctx->open_rec; | |
915 | struct sk_msg *msg_pl; | |
916 | size_t copied; | |
a42055e8 | 917 | |
a42055e8 | 918 | if (!rec) |
d3b18ad3 | 919 | return 0; |
a42055e8 | 920 | |
d829e9c4 | 921 | msg_pl = &rec->msg_plaintext; |
d3b18ad3 JF |
922 | copied = msg_pl->sg.size; |
923 | if (!copied) | |
924 | return 0; | |
a42055e8 | 925 | |
d3b18ad3 JF |
926 | return bpf_exec_tx_verdict(msg_pl, sk, true, TLS_RECORD_TYPE_DATA, |
927 | &copied, flags); | |
a42055e8 VG |
928 | } |
929 | ||
930 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) | |
931 | { | |
3c4d7559 | 932 | long timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
a42055e8 | 933 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
4509de14 | 934 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
a42055e8 | 935 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
5b053e12 | 936 | bool async_capable = ctx->async_capable; |
a42055e8 | 937 | unsigned char record_type = TLS_RECORD_TYPE_DATA; |
00e23707 | 938 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
3c4d7559 | 939 | bool eor = !(msg->msg_flags & MSG_MORE); |
a7bff11f VF |
940 | size_t try_to_copy; |
941 | ssize_t copied = 0; | |
d829e9c4 | 942 | struct sk_msg *msg_pl, *msg_en; |
a42055e8 VG |
943 | struct tls_rec *rec; |
944 | int required_size; | |
945 | int num_async = 0; | |
3c4d7559 | 946 | bool full_record; |
a42055e8 VG |
947 | int record_room; |
948 | int num_zc = 0; | |
3c4d7559 | 949 | int orig_size; |
4128c0cf | 950 | int ret = 0; |
0cada332 | 951 | int pending; |
3c4d7559 | 952 | |
1c3b63f1 RC |
953 | if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | |
954 | MSG_CMSG_COMPAT)) | |
4a5cdc60 | 955 | return -EOPNOTSUPP; |
3c4d7559 | 956 | |
79ffe608 | 957 | mutex_lock(&tls_ctx->tx_lock); |
3c4d7559 DW |
958 | lock_sock(sk); |
959 | ||
3c4d7559 DW |
960 | if (unlikely(msg->msg_controllen)) { |
961 | ret = tls_proccess_cmsg(sk, msg, &record_type); | |
a42055e8 VG |
962 | if (ret) { |
963 | if (ret == -EINPROGRESS) | |
964 | num_async++; | |
965 | else if (ret != -EAGAIN) | |
966 | goto send_end; | |
967 | } | |
3c4d7559 DW |
968 | } |
969 | ||
970 | while (msg_data_left(msg)) { | |
971 | if (sk->sk_err) { | |
30be8f8d | 972 | ret = -sk->sk_err; |
3c4d7559 DW |
973 | goto send_end; |
974 | } | |
975 | ||
d3b18ad3 JF |
976 | if (ctx->open_rec) |
977 | rec = ctx->open_rec; | |
978 | else | |
979 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
980 | if (!rec) { |
981 | ret = -ENOMEM; | |
982 | goto send_end; | |
983 | } | |
984 | ||
d829e9c4 DB |
985 | msg_pl = &rec->msg_plaintext; |
986 | msg_en = &rec->msg_encrypted; | |
987 | ||
988 | orig_size = msg_pl->sg.size; | |
3c4d7559 DW |
989 | full_record = false; |
990 | try_to_copy = msg_data_left(msg); | |
d829e9c4 | 991 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
3c4d7559 DW |
992 | if (try_to_copy >= record_room) { |
993 | try_to_copy = record_room; | |
994 | full_record = true; | |
995 | } | |
996 | ||
d829e9c4 | 997 | required_size = msg_pl->sg.size + try_to_copy + |
4509de14 | 998 | prot->overhead_size; |
3c4d7559 DW |
999 | |
1000 | if (!sk_stream_memory_free(sk)) | |
1001 | goto wait_for_sndbuf; | |
a42055e8 | 1002 | |
3c4d7559 | 1003 | alloc_encrypted: |
d829e9c4 | 1004 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
1005 | if (ret) { |
1006 | if (ret != -ENOSPC) | |
1007 | goto wait_for_memory; | |
1008 | ||
1009 | /* Adjust try_to_copy according to the amount that was | |
1010 | * actually allocated. The difference is due | |
1011 | * to max sg elements limit | |
1012 | */ | |
d829e9c4 | 1013 | try_to_copy -= required_size - msg_en->sg.size; |
3c4d7559 DW |
1014 | full_record = true; |
1015 | } | |
a42055e8 VG |
1016 | |
1017 | if (!is_kvec && (full_record || eor) && !async_capable) { | |
d3b18ad3 JF |
1018 | u32 first = msg_pl->sg.end; |
1019 | ||
d829e9c4 DB |
1020 | ret = sk_msg_zerocopy_from_iter(sk, &msg->msg_iter, |
1021 | msg_pl, try_to_copy); | |
3c4d7559 DW |
1022 | if (ret) |
1023 | goto fallback_to_reg_send; | |
1024 | ||
a42055e8 | 1025 | num_zc++; |
3c4d7559 | 1026 | copied += try_to_copy; |
d3b18ad3 JF |
1027 | |
1028 | sk_msg_sg_copy_set(msg_pl, first); | |
1029 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, | |
1030 | record_type, &copied, | |
1031 | msg->msg_flags); | |
a42055e8 VG |
1032 | if (ret) { |
1033 | if (ret == -EINPROGRESS) | |
1034 | num_async++; | |
d3b18ad3 JF |
1035 | else if (ret == -ENOMEM) |
1036 | goto wait_for_memory; | |
c329ef96 | 1037 | else if (ctx->open_rec && ret == -ENOSPC) |
d3b18ad3 | 1038 | goto rollback_iter; |
a42055e8 VG |
1039 | else if (ret != -EAGAIN) |
1040 | goto send_end; | |
1041 | } | |
5a3611ef | 1042 | continue; |
d3b18ad3 JF |
1043 | rollback_iter: |
1044 | copied -= try_to_copy; | |
1045 | sk_msg_sg_copy_clear(msg_pl, first); | |
1046 | iov_iter_revert(&msg->msg_iter, | |
1047 | msg_pl->sg.size - orig_size); | |
3c4d7559 | 1048 | fallback_to_reg_send: |
d829e9c4 | 1049 | sk_msg_trim(sk, msg_pl, orig_size); |
3c4d7559 DW |
1050 | } |
1051 | ||
d829e9c4 | 1052 | required_size = msg_pl->sg.size + try_to_copy; |
4e6d4720 | 1053 | |
d829e9c4 | 1054 | ret = tls_clone_plaintext_msg(sk, required_size); |
3c4d7559 DW |
1055 | if (ret) { |
1056 | if (ret != -ENOSPC) | |
4e6d4720 | 1057 | goto send_end; |
3c4d7559 DW |
1058 | |
1059 | /* Adjust try_to_copy according to the amount that was | |
1060 | * actually allocated. The difference is due | |
1061 | * to max sg elements limit | |
1062 | */ | |
d829e9c4 | 1063 | try_to_copy -= required_size - msg_pl->sg.size; |
3c4d7559 | 1064 | full_record = true; |
4509de14 VG |
1065 | sk_msg_trim(sk, msg_en, |
1066 | msg_pl->sg.size + prot->overhead_size); | |
3c4d7559 DW |
1067 | } |
1068 | ||
65a10e28 VG |
1069 | if (try_to_copy) { |
1070 | ret = sk_msg_memcopy_from_iter(sk, &msg->msg_iter, | |
1071 | msg_pl, try_to_copy); | |
1072 | if (ret < 0) | |
1073 | goto trim_sgl; | |
1074 | } | |
3c4d7559 | 1075 | |
d829e9c4 DB |
1076 | /* Open records defined only if successfully copied, otherwise |
1077 | * we would trim the sg but not reset the open record frags. | |
1078 | */ | |
1079 | tls_ctx->pending_open_record_frags = true; | |
3c4d7559 DW |
1080 | copied += try_to_copy; |
1081 | if (full_record || eor) { | |
d3b18ad3 JF |
1082 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
1083 | record_type, &copied, | |
1084 | msg->msg_flags); | |
3c4d7559 | 1085 | if (ret) { |
a42055e8 VG |
1086 | if (ret == -EINPROGRESS) |
1087 | num_async++; | |
d3b18ad3 JF |
1088 | else if (ret == -ENOMEM) |
1089 | goto wait_for_memory; | |
1090 | else if (ret != -EAGAIN) { | |
1091 | if (ret == -ENOSPC) | |
1092 | ret = 0; | |
a42055e8 | 1093 | goto send_end; |
d3b18ad3 | 1094 | } |
3c4d7559 DW |
1095 | } |
1096 | } | |
1097 | ||
1098 | continue; | |
1099 | ||
1100 | wait_for_sndbuf: | |
1101 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
1102 | wait_for_memory: | |
1103 | ret = sk_stream_wait_memory(sk, &timeo); | |
1104 | if (ret) { | |
1105 | trim_sgl: | |
c329ef96 JK |
1106 | if (ctx->open_rec) |
1107 | tls_trim_both_msgs(sk, orig_size); | |
3c4d7559 DW |
1108 | goto send_end; |
1109 | } | |
1110 | ||
c329ef96 | 1111 | if (ctx->open_rec && msg_en->sg.size < required_size) |
3c4d7559 | 1112 | goto alloc_encrypted; |
3c4d7559 DW |
1113 | } |
1114 | ||
a42055e8 VG |
1115 | if (!num_async) { |
1116 | goto send_end; | |
1117 | } else if (num_zc) { | |
1118 | /* Wait for pending encryptions to get completed */ | |
0cada332 VKY |
1119 | spin_lock_bh(&ctx->encrypt_compl_lock); |
1120 | ctx->async_notify = true; | |
a42055e8 | 1121 | |
0cada332 VKY |
1122 | pending = atomic_read(&ctx->encrypt_pending); |
1123 | spin_unlock_bh(&ctx->encrypt_compl_lock); | |
1124 | if (pending) | |
a42055e8 VG |
1125 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
1126 | else | |
1127 | reinit_completion(&ctx->async_wait.completion); | |
1128 | ||
0cada332 VKY |
1129 | /* There can be no concurrent accesses, since we have no |
1130 | * pending encrypt operations | |
1131 | */ | |
a42055e8 VG |
1132 | WRITE_ONCE(ctx->async_notify, false); |
1133 | ||
1134 | if (ctx->async_wait.err) { | |
1135 | ret = ctx->async_wait.err; | |
1136 | copied = 0; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* Transmit if any encryptions have completed */ | |
1141 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1142 | cancel_delayed_work(&ctx->tx_work.work); | |
1143 | tls_tx_records(sk, msg->msg_flags); | |
1144 | } | |
1145 | ||
3c4d7559 DW |
1146 | send_end: |
1147 | ret = sk_stream_error(sk, msg->msg_flags, ret); | |
1148 | ||
1149 | release_sock(sk); | |
79ffe608 | 1150 | mutex_unlock(&tls_ctx->tx_lock); |
a7bff11f | 1151 | return copied > 0 ? copied : ret; |
3c4d7559 DW |
1152 | } |
1153 | ||
01cb8a1a Y |
1154 | static int tls_sw_do_sendpage(struct sock *sk, struct page *page, |
1155 | int offset, size_t size, int flags) | |
3c4d7559 | 1156 | { |
a42055e8 | 1157 | long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
3c4d7559 | 1158 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 1159 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
4509de14 | 1160 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
3c4d7559 | 1161 | unsigned char record_type = TLS_RECORD_TYPE_DATA; |
d829e9c4 | 1162 | struct sk_msg *msg_pl; |
a42055e8 VG |
1163 | struct tls_rec *rec; |
1164 | int num_async = 0; | |
a7bff11f | 1165 | ssize_t copied = 0; |
3c4d7559 DW |
1166 | bool full_record; |
1167 | int record_room; | |
4128c0cf | 1168 | int ret = 0; |
a42055e8 | 1169 | bool eor; |
3c4d7559 | 1170 | |
d452d48b | 1171 | eor = !(flags & MSG_SENDPAGE_NOTLAST); |
3c4d7559 DW |
1172 | sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
1173 | ||
3c4d7559 DW |
1174 | /* Call the sk_stream functions to manage the sndbuf mem. */ |
1175 | while (size > 0) { | |
1176 | size_t copy, required_size; | |
1177 | ||
1178 | if (sk->sk_err) { | |
30be8f8d | 1179 | ret = -sk->sk_err; |
3c4d7559 DW |
1180 | goto sendpage_end; |
1181 | } | |
1182 | ||
d3b18ad3 JF |
1183 | if (ctx->open_rec) |
1184 | rec = ctx->open_rec; | |
1185 | else | |
1186 | rec = ctx->open_rec = tls_get_rec(sk); | |
a42055e8 VG |
1187 | if (!rec) { |
1188 | ret = -ENOMEM; | |
1189 | goto sendpage_end; | |
1190 | } | |
1191 | ||
d829e9c4 DB |
1192 | msg_pl = &rec->msg_plaintext; |
1193 | ||
3c4d7559 | 1194 | full_record = false; |
d829e9c4 | 1195 | record_room = TLS_MAX_PAYLOAD_SIZE - msg_pl->sg.size; |
3c4d7559 DW |
1196 | copy = size; |
1197 | if (copy >= record_room) { | |
1198 | copy = record_room; | |
1199 | full_record = true; | |
1200 | } | |
d829e9c4 | 1201 | |
4509de14 | 1202 | required_size = msg_pl->sg.size + copy + prot->overhead_size; |
3c4d7559 DW |
1203 | |
1204 | if (!sk_stream_memory_free(sk)) | |
1205 | goto wait_for_sndbuf; | |
1206 | alloc_payload: | |
d829e9c4 | 1207 | ret = tls_alloc_encrypted_msg(sk, required_size); |
3c4d7559 DW |
1208 | if (ret) { |
1209 | if (ret != -ENOSPC) | |
1210 | goto wait_for_memory; | |
1211 | ||
1212 | /* Adjust copy according to the amount that was | |
1213 | * actually allocated. The difference is due | |
1214 | * to max sg elements limit | |
1215 | */ | |
d829e9c4 | 1216 | copy -= required_size - msg_pl->sg.size; |
3c4d7559 DW |
1217 | full_record = true; |
1218 | } | |
1219 | ||
d829e9c4 | 1220 | sk_msg_page_add(msg_pl, page, copy, offset); |
3c4d7559 | 1221 | sk_mem_charge(sk, copy); |
d829e9c4 | 1222 | |
3c4d7559 DW |
1223 | offset += copy; |
1224 | size -= copy; | |
d3b18ad3 | 1225 | copied += copy; |
3c4d7559 | 1226 | |
d829e9c4 DB |
1227 | tls_ctx->pending_open_record_frags = true; |
1228 | if (full_record || eor || sk_msg_full(msg_pl)) { | |
d3b18ad3 JF |
1229 | ret = bpf_exec_tx_verdict(msg_pl, sk, full_record, |
1230 | record_type, &copied, flags); | |
3c4d7559 | 1231 | if (ret) { |
a42055e8 VG |
1232 | if (ret == -EINPROGRESS) |
1233 | num_async++; | |
d3b18ad3 JF |
1234 | else if (ret == -ENOMEM) |
1235 | goto wait_for_memory; | |
1236 | else if (ret != -EAGAIN) { | |
1237 | if (ret == -ENOSPC) | |
1238 | ret = 0; | |
a42055e8 | 1239 | goto sendpage_end; |
d3b18ad3 | 1240 | } |
3c4d7559 DW |
1241 | } |
1242 | } | |
1243 | continue; | |
1244 | wait_for_sndbuf: | |
1245 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); | |
1246 | wait_for_memory: | |
1247 | ret = sk_stream_wait_memory(sk, &timeo); | |
1248 | if (ret) { | |
c329ef96 JK |
1249 | if (ctx->open_rec) |
1250 | tls_trim_both_msgs(sk, msg_pl->sg.size); | |
3c4d7559 DW |
1251 | goto sendpage_end; |
1252 | } | |
1253 | ||
c329ef96 JK |
1254 | if (ctx->open_rec) |
1255 | goto alloc_payload; | |
3c4d7559 DW |
1256 | } |
1257 | ||
a42055e8 VG |
1258 | if (num_async) { |
1259 | /* Transmit if any encryptions have completed */ | |
1260 | if (test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) { | |
1261 | cancel_delayed_work(&ctx->tx_work.work); | |
1262 | tls_tx_records(sk, flags); | |
1263 | } | |
1264 | } | |
3c4d7559 | 1265 | sendpage_end: |
d3b18ad3 | 1266 | ret = sk_stream_error(sk, flags, ret); |
a7bff11f | 1267 | return copied > 0 ? copied : ret; |
3c4d7559 DW |
1268 | } |
1269 | ||
d4ffb02d WB |
1270 | int tls_sw_sendpage_locked(struct sock *sk, struct page *page, |
1271 | int offset, size_t size, int flags) | |
1272 | { | |
1273 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1274 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY | | |
1275 | MSG_NO_SHARED_FRAGS)) | |
4a5cdc60 | 1276 | return -EOPNOTSUPP; |
d4ffb02d WB |
1277 | |
1278 | return tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1279 | } | |
1280 | ||
0608c69c JF |
1281 | int tls_sw_sendpage(struct sock *sk, struct page *page, |
1282 | int offset, size_t size, int flags) | |
1283 | { | |
79ffe608 | 1284 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
0608c69c JF |
1285 | int ret; |
1286 | ||
1287 | if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | | |
1288 | MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY)) | |
4a5cdc60 | 1289 | return -EOPNOTSUPP; |
0608c69c | 1290 | |
79ffe608 | 1291 | mutex_lock(&tls_ctx->tx_lock); |
0608c69c JF |
1292 | lock_sock(sk); |
1293 | ret = tls_sw_do_sendpage(sk, page, offset, size, flags); | |
1294 | release_sock(sk); | |
79ffe608 | 1295 | mutex_unlock(&tls_ctx->tx_lock); |
0608c69c JF |
1296 | return ret; |
1297 | } | |
1298 | ||
d3b18ad3 | 1299 | static struct sk_buff *tls_wait_data(struct sock *sk, struct sk_psock *psock, |
974271e5 | 1300 | bool nonblock, long timeo, int *err) |
c46234eb DW |
1301 | { |
1302 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1303 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
1304 | struct sk_buff *skb; |
1305 | DEFINE_WAIT_FUNC(wait, woken_wake_function); | |
1306 | ||
d3b18ad3 | 1307 | while (!(skb = ctx->recv_pkt) && sk_psock_queue_empty(psock)) { |
c46234eb DW |
1308 | if (sk->sk_err) { |
1309 | *err = sock_error(sk); | |
1310 | return NULL; | |
1311 | } | |
1312 | ||
20ffc7ad VF |
1313 | if (!skb_queue_empty(&sk->sk_receive_queue)) { |
1314 | __strp_unpause(&ctx->strp); | |
1315 | if (ctx->recv_pkt) | |
1316 | return ctx->recv_pkt; | |
1317 | } | |
1318 | ||
fcf4793e DRK |
1319 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1320 | return NULL; | |
1321 | ||
c46234eb DW |
1322 | if (sock_flag(sk, SOCK_DONE)) |
1323 | return NULL; | |
1324 | ||
974271e5 | 1325 | if (nonblock || !timeo) { |
c46234eb DW |
1326 | *err = -EAGAIN; |
1327 | return NULL; | |
1328 | } | |
1329 | ||
1330 | add_wait_queue(sk_sleep(sk), &wait); | |
1331 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); | |
d3b18ad3 JF |
1332 | sk_wait_event(sk, &timeo, |
1333 | ctx->recv_pkt != skb || | |
1334 | !sk_psock_queue_empty(psock), | |
1335 | &wait); | |
c46234eb DW |
1336 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
1337 | remove_wait_queue(sk_sleep(sk), &wait); | |
1338 | ||
1339 | /* Handle signals */ | |
1340 | if (signal_pending(current)) { | |
1341 | *err = sock_intr_errno(timeo); | |
1342 | return NULL; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | return skb; | |
1347 | } | |
1348 | ||
d829e9c4 DB |
1349 | static int tls_setup_from_iter(struct sock *sk, struct iov_iter *from, |
1350 | int length, int *pages_used, | |
1351 | unsigned int *size_used, | |
1352 | struct scatterlist *to, | |
1353 | int to_max_pages) | |
1354 | { | |
1355 | int rc = 0, i = 0, num_elem = *pages_used, maxpages; | |
1356 | struct page *pages[MAX_SKB_FRAGS]; | |
1357 | unsigned int size = *size_used; | |
1358 | ssize_t copied, use; | |
1359 | size_t offset; | |
1360 | ||
1361 | while (length > 0) { | |
1362 | i = 0; | |
1363 | maxpages = to_max_pages - num_elem; | |
1364 | if (maxpages == 0) { | |
1365 | rc = -EFAULT; | |
1366 | goto out; | |
1367 | } | |
1368 | copied = iov_iter_get_pages(from, pages, | |
1369 | length, | |
1370 | maxpages, &offset); | |
1371 | if (copied <= 0) { | |
1372 | rc = -EFAULT; | |
1373 | goto out; | |
1374 | } | |
1375 | ||
1376 | iov_iter_advance(from, copied); | |
1377 | ||
1378 | length -= copied; | |
1379 | size += copied; | |
1380 | while (copied) { | |
1381 | use = min_t(int, copied, PAGE_SIZE - offset); | |
1382 | ||
1383 | sg_set_page(&to[num_elem], | |
1384 | pages[i], use, offset); | |
1385 | sg_unmark_end(&to[num_elem]); | |
1386 | /* We do not uncharge memory from this API */ | |
1387 | ||
1388 | offset = 0; | |
1389 | copied -= use; | |
1390 | ||
1391 | i++; | |
1392 | num_elem++; | |
1393 | } | |
1394 | } | |
1395 | /* Mark the end in the last sg entry if newly added */ | |
1396 | if (num_elem > *pages_used) | |
1397 | sg_mark_end(&to[num_elem - 1]); | |
1398 | out: | |
1399 | if (rc) | |
1400 | iov_iter_revert(from, size - *size_used); | |
1401 | *size_used = size; | |
1402 | *pages_used = num_elem; | |
1403 | ||
1404 | return rc; | |
1405 | } | |
1406 | ||
0b243d00 VG |
1407 | /* This function decrypts the input skb into either out_iov or in out_sg |
1408 | * or in skb buffers itself. The input parameter 'zc' indicates if | |
1409 | * zero-copy mode needs to be tried or not. With zero-copy mode, either | |
1410 | * out_iov or out_sg must be non-NULL. In case both out_iov and out_sg are | |
1411 | * NULL, then the decryption happens inside skb buffers itself, i.e. | |
1412 | * zero-copy gets disabled and 'zc' is updated. | |
1413 | */ | |
1414 | ||
1415 | static int decrypt_internal(struct sock *sk, struct sk_buff *skb, | |
1416 | struct iov_iter *out_iov, | |
1417 | struct scatterlist *out_sg, | |
692d7b5d | 1418 | int *chunk, bool *zc, bool async) |
0b243d00 VG |
1419 | { |
1420 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1421 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
4509de14 | 1422 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
0b243d00 | 1423 | struct strp_msg *rxm = strp_msg(skb); |
c3f6bb74 | 1424 | struct tls_msg *tlm = tls_msg(skb); |
0b243d00 VG |
1425 | int n_sgin, n_sgout, nsg, mem_size, aead_size, err, pages = 0; |
1426 | struct aead_request *aead_req; | |
1427 | struct sk_buff *unused; | |
1428 | u8 *aad, *iv, *mem = NULL; | |
1429 | struct scatterlist *sgin = NULL; | |
1430 | struct scatterlist *sgout = NULL; | |
4509de14 VG |
1431 | const int data_len = rxm->full_len - prot->overhead_size + |
1432 | prot->tail_size; | |
f295b3ae | 1433 | int iv_offset = 0; |
0b243d00 VG |
1434 | |
1435 | if (*zc && (out_iov || out_sg)) { | |
1436 | if (out_iov) | |
b93235e6 JK |
1437 | n_sgout = 1 + |
1438 | iov_iter_npages_cap(out_iov, INT_MAX, data_len); | |
0b243d00 VG |
1439 | else |
1440 | n_sgout = sg_nents(out_sg); | |
4509de14 VG |
1441 | n_sgin = skb_nsg(skb, rxm->offset + prot->prepend_size, |
1442 | rxm->full_len - prot->prepend_size); | |
0b243d00 VG |
1443 | } else { |
1444 | n_sgout = 0; | |
1445 | *zc = false; | |
0927f71d | 1446 | n_sgin = skb_cow_data(skb, 0, &unused); |
0b243d00 VG |
1447 | } |
1448 | ||
0b243d00 VG |
1449 | if (n_sgin < 1) |
1450 | return -EBADMSG; | |
1451 | ||
1452 | /* Increment to accommodate AAD */ | |
1453 | n_sgin = n_sgin + 1; | |
1454 | ||
1455 | nsg = n_sgin + n_sgout; | |
1456 | ||
1457 | aead_size = sizeof(*aead_req) + crypto_aead_reqsize(ctx->aead_recv); | |
1458 | mem_size = aead_size + (nsg * sizeof(struct scatterlist)); | |
4509de14 | 1459 | mem_size = mem_size + prot->aad_size; |
0b243d00 VG |
1460 | mem_size = mem_size + crypto_aead_ivsize(ctx->aead_recv); |
1461 | ||
1462 | /* Allocate a single block of memory which contains | |
1463 | * aead_req || sgin[] || sgout[] || aad || iv. | |
1464 | * This order achieves correct alignment for aead_req, sgin, sgout. | |
1465 | */ | |
1466 | mem = kmalloc(mem_size, sk->sk_allocation); | |
1467 | if (!mem) | |
1468 | return -ENOMEM; | |
1469 | ||
1470 | /* Segment the allocated memory */ | |
1471 | aead_req = (struct aead_request *)mem; | |
1472 | sgin = (struct scatterlist *)(mem + aead_size); | |
1473 | sgout = sgin + n_sgin; | |
1474 | aad = (u8 *)(sgout + n_sgout); | |
4509de14 | 1475 | iv = aad + prot->aad_size; |
0b243d00 | 1476 | |
128cfb88 TZ |
1477 | /* For CCM based ciphers, first byte of nonce+iv is a constant */ |
1478 | switch (prot->cipher_type) { | |
1479 | case TLS_CIPHER_AES_CCM_128: | |
1480 | iv[0] = TLS_AES_CCM_IV_B0_BYTE; | |
f295b3ae | 1481 | iv_offset = 1; |
128cfb88 TZ |
1482 | break; |
1483 | case TLS_CIPHER_SM4_CCM: | |
1484 | iv[0] = TLS_SM4_CCM_IV_B0_BYTE; | |
1485 | iv_offset = 1; | |
1486 | break; | |
f295b3ae VG |
1487 | } |
1488 | ||
0b243d00 VG |
1489 | /* Prepare IV */ |
1490 | err = skb_copy_bits(skb, rxm->offset + TLS_HEADER_SIZE, | |
f295b3ae | 1491 | iv + iv_offset + prot->salt_size, |
4509de14 | 1492 | prot->iv_size); |
0b243d00 VG |
1493 | if (err < 0) { |
1494 | kfree(mem); | |
1495 | return err; | |
1496 | } | |
a6acbe62 VF |
1497 | if (prot->version == TLS_1_3_VERSION || |
1498 | prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) | |
f295b3ae | 1499 | memcpy(iv + iv_offset, tls_ctx->rx.iv, |
9381fe8c | 1500 | prot->iv_size + prot->salt_size); |
130b392c | 1501 | else |
f295b3ae | 1502 | memcpy(iv + iv_offset, tls_ctx->rx.iv, prot->salt_size); |
130b392c | 1503 | |
59610606 | 1504 | xor_iv_with_seq(prot, iv + iv_offset, tls_ctx->rx.rec_seq); |
0b243d00 VG |
1505 | |
1506 | /* Prepare AAD */ | |
4509de14 VG |
1507 | tls_make_aad(aad, rxm->full_len - prot->overhead_size + |
1508 | prot->tail_size, | |
c3f6bb74 | 1509 | tls_ctx->rx.rec_seq, tlm->control, prot); |
0b243d00 VG |
1510 | |
1511 | /* Prepare sgin */ | |
1512 | sg_init_table(sgin, n_sgin); | |
4509de14 | 1513 | sg_set_buf(&sgin[0], aad, prot->aad_size); |
0b243d00 | 1514 | err = skb_to_sgvec(skb, &sgin[1], |
4509de14 VG |
1515 | rxm->offset + prot->prepend_size, |
1516 | rxm->full_len - prot->prepend_size); | |
0b243d00 VG |
1517 | if (err < 0) { |
1518 | kfree(mem); | |
1519 | return err; | |
1520 | } | |
1521 | ||
1522 | if (n_sgout) { | |
1523 | if (out_iov) { | |
1524 | sg_init_table(sgout, n_sgout); | |
4509de14 | 1525 | sg_set_buf(&sgout[0], aad, prot->aad_size); |
0b243d00 VG |
1526 | |
1527 | *chunk = 0; | |
d829e9c4 DB |
1528 | err = tls_setup_from_iter(sk, out_iov, data_len, |
1529 | &pages, chunk, &sgout[1], | |
1530 | (n_sgout - 1)); | |
0b243d00 VG |
1531 | if (err < 0) |
1532 | goto fallback_to_reg_recv; | |
1533 | } else if (out_sg) { | |
1534 | memcpy(sgout, out_sg, n_sgout * sizeof(*sgout)); | |
1535 | } else { | |
1536 | goto fallback_to_reg_recv; | |
1537 | } | |
1538 | } else { | |
1539 | fallback_to_reg_recv: | |
1540 | sgout = sgin; | |
1541 | pages = 0; | |
692d7b5d | 1542 | *chunk = data_len; |
0b243d00 VG |
1543 | *zc = false; |
1544 | } | |
1545 | ||
1546 | /* Prepare and submit AEAD request */ | |
94524d8f | 1547 | err = tls_do_decryption(sk, skb, sgin, sgout, iv, |
692d7b5d | 1548 | data_len, aead_req, async); |
94524d8f VG |
1549 | if (err == -EINPROGRESS) |
1550 | return err; | |
0b243d00 VG |
1551 | |
1552 | /* Release the pages in case iov was mapped to pages */ | |
1553 | for (; pages > 0; pages--) | |
1554 | put_page(sg_page(&sgout[pages])); | |
1555 | ||
1556 | kfree(mem); | |
1557 | return err; | |
1558 | } | |
1559 | ||
dafb67f3 | 1560 | static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb, |
692d7b5d VG |
1561 | struct iov_iter *dest, int *chunk, bool *zc, |
1562 | bool async) | |
dafb67f3 BP |
1563 | { |
1564 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
1565 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
4509de14 | 1566 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
dafb67f3 | 1567 | struct strp_msg *rxm = strp_msg(skb); |
7dc59c33 | 1568 | struct tls_msg *tlm = tls_msg(skb); |
b53f4976 | 1569 | int pad, err = 0; |
dafb67f3 | 1570 | |
7dc59c33 | 1571 | if (!tlm->decrypted) { |
b9d8fec9 | 1572 | if (tls_ctx->rx_conf == TLS_HW) { |
4de30a8d | 1573 | err = tls_device_decrypted(sk, tls_ctx, skb, rxm); |
b9d8fec9 JK |
1574 | if (err < 0) |
1575 | return err; | |
1576 | } | |
be2fbc15 | 1577 | |
d069b780 | 1578 | /* Still not decrypted after tls_device */ |
7dc59c33 | 1579 | if (!tlm->decrypted) { |
d069b780 BP |
1580 | err = decrypt_internal(sk, skb, dest, NULL, chunk, zc, |
1581 | async); | |
1582 | if (err < 0) { | |
1583 | if (err == -EINPROGRESS) | |
fb0f886f JK |
1584 | tls_advance_record_sn(sk, prot, |
1585 | &tls_ctx->rx); | |
5c5d22a7 JK |
1586 | else if (err == -EBADMSG) |
1587 | TLS_INC_STATS(sock_net(sk), | |
1588 | LINUX_MIB_TLSDECRYPTERROR); | |
d069b780 BP |
1589 | return err; |
1590 | } | |
c43ac97b JK |
1591 | } else { |
1592 | *zc = false; | |
94524d8f | 1593 | } |
130b392c | 1594 | |
c3f6bb74 | 1595 | pad = padding_length(prot, skb); |
b53f4976 JK |
1596 | if (pad < 0) |
1597 | return pad; | |
1598 | ||
1599 | rxm->full_len -= pad; | |
4509de14 VG |
1600 | rxm->offset += prot->prepend_size; |
1601 | rxm->full_len -= prot->overhead_size; | |
fb0f886f | 1602 | tls_advance_record_sn(sk, prot, &tls_ctx->rx); |
7dc59c33 | 1603 | tlm->decrypted = 1; |
fedf201e | 1604 | ctx->saved_data_ready(sk); |
4799ac81 BP |
1605 | } else { |
1606 | *zc = false; | |
1607 | } | |
dafb67f3 | 1608 | |
dafb67f3 BP |
1609 | return err; |
1610 | } | |
1611 | ||
1612 | int decrypt_skb(struct sock *sk, struct sk_buff *skb, | |
1613 | struct scatterlist *sgout) | |
c46234eb | 1614 | { |
0b243d00 VG |
1615 | bool zc = true; |
1616 | int chunk; | |
c46234eb | 1617 | |
692d7b5d | 1618 | return decrypt_internal(sk, skb, NULL, sgout, &chunk, &zc, false); |
c46234eb DW |
1619 | } |
1620 | ||
1621 | static bool tls_sw_advance_skb(struct sock *sk, struct sk_buff *skb, | |
1622 | unsigned int len) | |
1623 | { | |
1624 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1625 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb | 1626 | |
94524d8f VG |
1627 | if (skb) { |
1628 | struct strp_msg *rxm = strp_msg(skb); | |
c46234eb | 1629 | |
94524d8f VG |
1630 | if (len < rxm->full_len) { |
1631 | rxm->offset += len; | |
1632 | rxm->full_len -= len; | |
1633 | return false; | |
1634 | } | |
a88c26f6 | 1635 | consume_skb(skb); |
c46234eb DW |
1636 | } |
1637 | ||
1638 | /* Finished with message */ | |
1639 | ctx->recv_pkt = NULL; | |
7170e604 | 1640 | __strp_unpause(&ctx->strp); |
c46234eb DW |
1641 | |
1642 | return true; | |
1643 | } | |
1644 | ||
692d7b5d | 1645 | /* This function traverses the rx_list in tls receive context to copies the |
2b794c40 | 1646 | * decrypted records into the buffer provided by caller zero copy is not |
692d7b5d VG |
1647 | * true. Further, the records are removed from the rx_list if it is not a peek |
1648 | * case and the record has been consumed completely. | |
1649 | */ | |
1650 | static int process_rx_list(struct tls_sw_context_rx *ctx, | |
1651 | struct msghdr *msg, | |
2b794c40 VG |
1652 | u8 *control, |
1653 | bool *cmsg, | |
692d7b5d VG |
1654 | size_t skip, |
1655 | size_t len, | |
1656 | bool zc, | |
1657 | bool is_peek) | |
1658 | { | |
1659 | struct sk_buff *skb = skb_peek(&ctx->rx_list); | |
2b794c40 VG |
1660 | u8 ctrl = *control; |
1661 | u8 msgc = *cmsg; | |
1662 | struct tls_msg *tlm; | |
692d7b5d VG |
1663 | ssize_t copied = 0; |
1664 | ||
2b794c40 VG |
1665 | /* Set the record type in 'control' if caller didn't pass it */ |
1666 | if (!ctrl && skb) { | |
1667 | tlm = tls_msg(skb); | |
1668 | ctrl = tlm->control; | |
1669 | } | |
1670 | ||
692d7b5d VG |
1671 | while (skip && skb) { |
1672 | struct strp_msg *rxm = strp_msg(skb); | |
2b794c40 VG |
1673 | tlm = tls_msg(skb); |
1674 | ||
1675 | /* Cannot process a record of different type */ | |
1676 | if (ctrl != tlm->control) | |
1677 | return 0; | |
692d7b5d VG |
1678 | |
1679 | if (skip < rxm->full_len) | |
1680 | break; | |
1681 | ||
1682 | skip = skip - rxm->full_len; | |
1683 | skb = skb_peek_next(skb, &ctx->rx_list); | |
1684 | } | |
1685 | ||
1686 | while (len && skb) { | |
1687 | struct sk_buff *next_skb; | |
1688 | struct strp_msg *rxm = strp_msg(skb); | |
1689 | int chunk = min_t(unsigned int, rxm->full_len - skip, len); | |
1690 | ||
2b794c40 VG |
1691 | tlm = tls_msg(skb); |
1692 | ||
1693 | /* Cannot process a record of different type */ | |
1694 | if (ctrl != tlm->control) | |
1695 | return 0; | |
1696 | ||
1697 | /* Set record type if not already done. For a non-data record, | |
1698 | * do not proceed if record type could not be copied. | |
1699 | */ | |
1700 | if (!msgc) { | |
1701 | int cerr = put_cmsg(msg, SOL_TLS, TLS_GET_RECORD_TYPE, | |
1702 | sizeof(ctrl), &ctrl); | |
1703 | msgc = true; | |
1704 | if (ctrl != TLS_RECORD_TYPE_DATA) { | |
1705 | if (cerr || msg->msg_flags & MSG_CTRUNC) | |
1706 | return -EIO; | |
1707 | ||
1708 | *cmsg = msgc; | |
1709 | } | |
1710 | } | |
1711 | ||
692d7b5d VG |
1712 | if (!zc || (rxm->full_len - skip) > len) { |
1713 | int err = skb_copy_datagram_msg(skb, rxm->offset + skip, | |
1714 | msg, chunk); | |
1715 | if (err < 0) | |
1716 | return err; | |
1717 | } | |
1718 | ||
1719 | len = len - chunk; | |
1720 | copied = copied + chunk; | |
1721 | ||
1722 | /* Consume the data from record if it is non-peek case*/ | |
1723 | if (!is_peek) { | |
1724 | rxm->offset = rxm->offset + chunk; | |
1725 | rxm->full_len = rxm->full_len - chunk; | |
1726 | ||
1727 | /* Return if there is unconsumed data in the record */ | |
1728 | if (rxm->full_len - skip) | |
1729 | break; | |
1730 | } | |
1731 | ||
1732 | /* The remaining skip-bytes must lie in 1st record in rx_list. | |
1733 | * So from the 2nd record, 'skip' should be 0. | |
1734 | */ | |
1735 | skip = 0; | |
1736 | ||
1737 | if (msg) | |
1738 | msg->msg_flags |= MSG_EOR; | |
1739 | ||
1740 | next_skb = skb_peek_next(skb, &ctx->rx_list); | |
1741 | ||
1742 | if (!is_peek) { | |
1743 | skb_unlink(skb, &ctx->rx_list); | |
a88c26f6 | 1744 | consume_skb(skb); |
692d7b5d VG |
1745 | } |
1746 | ||
1747 | skb = next_skb; | |
1748 | } | |
1749 | ||
2b794c40 | 1750 | *control = ctrl; |
692d7b5d VG |
1751 | return copied; |
1752 | } | |
1753 | ||
c46234eb DW |
1754 | int tls_sw_recvmsg(struct sock *sk, |
1755 | struct msghdr *msg, | |
1756 | size_t len, | |
1757 | int nonblock, | |
1758 | int flags, | |
1759 | int *addr_len) | |
1760 | { | |
1761 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 1762 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
4509de14 | 1763 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
d3b18ad3 | 1764 | struct sk_psock *psock; |
bfc06e1a | 1765 | int num_async, pending; |
692d7b5d VG |
1766 | unsigned char control = 0; |
1767 | ssize_t decrypted = 0; | |
c46234eb | 1768 | struct strp_msg *rxm; |
2b794c40 | 1769 | struct tls_msg *tlm; |
c46234eb DW |
1770 | struct sk_buff *skb; |
1771 | ssize_t copied = 0; | |
1772 | bool cmsg = false; | |
06030dba | 1773 | int target, err = 0; |
c46234eb | 1774 | long timeo; |
00e23707 | 1775 | bool is_kvec = iov_iter_is_kvec(&msg->msg_iter); |
692d7b5d | 1776 | bool is_peek = flags & MSG_PEEK; |
e91de6af | 1777 | bool bpf_strp_enabled; |
c46234eb DW |
1778 | |
1779 | flags |= nonblock; | |
1780 | ||
1781 | if (unlikely(flags & MSG_ERRQUEUE)) | |
1782 | return sock_recv_errqueue(sk, msg, len, SOL_IP, IP_RECVERR); | |
1783 | ||
d3b18ad3 | 1784 | psock = sk_psock_get(sk); |
c46234eb | 1785 | lock_sock(sk); |
e91de6af | 1786 | bpf_strp_enabled = sk_psock_strp_enabled(psock); |
c46234eb | 1787 | |
692d7b5d | 1788 | /* Process pending decrypted records. It must be non-zero-copy */ |
2b794c40 VG |
1789 | err = process_rx_list(ctx, msg, &control, &cmsg, 0, len, false, |
1790 | is_peek); | |
692d7b5d VG |
1791 | if (err < 0) { |
1792 | tls_err_abort(sk, err); | |
1793 | goto end; | |
692d7b5d VG |
1794 | } |
1795 | ||
d5123edd | 1796 | copied = err; |
46a16959 | 1797 | if (len <= copied) |
bfc06e1a | 1798 | goto end; |
46a16959 JK |
1799 | |
1800 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); | |
1801 | len = len - copied; | |
1802 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
692d7b5d | 1803 | |
bfc06e1a JK |
1804 | decrypted = 0; |
1805 | num_async = 0; | |
04b25a54 | 1806 | while (len && (decrypted + copied < target || ctx->recv_pkt)) { |
692d7b5d | 1807 | bool retain_skb = false; |
692d7b5d VG |
1808 | bool zc = false; |
1809 | int to_decrypt; | |
c46234eb | 1810 | int chunk = 0; |
7754bd63 EBE |
1811 | bool async_capable; |
1812 | bool async = false; | |
c46234eb | 1813 | |
974271e5 | 1814 | skb = tls_wait_data(sk, psock, flags & MSG_DONTWAIT, timeo, &err); |
d3b18ad3 JF |
1815 | if (!skb) { |
1816 | if (psock) { | |
2bc793e3 CW |
1817 | int ret = sk_msg_recvmsg(sk, psock, msg, len, |
1818 | flags); | |
d3b18ad3 JF |
1819 | |
1820 | if (ret > 0) { | |
692d7b5d | 1821 | decrypted += ret; |
d3b18ad3 JF |
1822 | len -= ret; |
1823 | continue; | |
1824 | } | |
1825 | } | |
c46234eb | 1826 | goto recv_end; |
d3b18ad3 | 1827 | } |
c46234eb DW |
1828 | |
1829 | rxm = strp_msg(skb); | |
c3f6bb74 | 1830 | tlm = tls_msg(skb); |
94524d8f | 1831 | |
4509de14 | 1832 | to_decrypt = rxm->full_len - prot->overhead_size; |
fedf201e DW |
1833 | |
1834 | if (to_decrypt <= len && !is_kvec && !is_peek && | |
c3f6bb74 | 1835 | tlm->control == TLS_RECORD_TYPE_DATA && |
e91de6af JF |
1836 | prot->version != TLS_1_3_VERSION && |
1837 | !bpf_strp_enabled) | |
fedf201e DW |
1838 | zc = true; |
1839 | ||
c0ab4732 | 1840 | /* Do not use async mode if record is non-data */ |
c3f6bb74 | 1841 | if (tlm->control == TLS_RECORD_TYPE_DATA && !bpf_strp_enabled) |
7754bd63 | 1842 | async_capable = ctx->async_capable; |
c0ab4732 | 1843 | else |
7754bd63 | 1844 | async_capable = false; |
c0ab4732 | 1845 | |
fedf201e | 1846 | err = decrypt_skb_update(sk, skb, &msg->msg_iter, |
7754bd63 | 1847 | &chunk, &zc, async_capable); |
fedf201e | 1848 | if (err < 0 && err != -EINPROGRESS) { |
da353fac | 1849 | tls_err_abort(sk, -EBADMSG); |
fedf201e DW |
1850 | goto recv_end; |
1851 | } | |
1852 | ||
7754bd63 EBE |
1853 | if (err == -EINPROGRESS) { |
1854 | async = true; | |
fedf201e | 1855 | num_async++; |
7754bd63 | 1856 | } |
2b794c40 VG |
1857 | |
1858 | /* If the type of records being processed is not known yet, | |
1859 | * set it to record type just dequeued. If it is already known, | |
1860 | * but does not match the record type just dequeued, go to end. | |
1861 | * We always get record type here since for tls1.2, record type | |
1862 | * is known just after record is dequeued from stream parser. | |
1863 | * For tls1.3, we disable async. | |
1864 | */ | |
1865 | ||
1866 | if (!control) | |
1867 | control = tlm->control; | |
1868 | else if (control != tlm->control) | |
1869 | goto recv_end; | |
fedf201e | 1870 | |
c46234eb DW |
1871 | if (!cmsg) { |
1872 | int cerr; | |
1873 | ||
1874 | cerr = put_cmsg(msg, SOL_TLS, TLS_GET_RECORD_TYPE, | |
2b794c40 | 1875 | sizeof(control), &control); |
c46234eb | 1876 | cmsg = true; |
2b794c40 | 1877 | if (control != TLS_RECORD_TYPE_DATA) { |
c46234eb DW |
1878 | if (cerr || msg->msg_flags & MSG_CTRUNC) { |
1879 | err = -EIO; | |
1880 | goto recv_end; | |
1881 | } | |
1882 | } | |
c46234eb DW |
1883 | } |
1884 | ||
c0ab4732 VG |
1885 | if (async) |
1886 | goto pick_next_record; | |
1887 | ||
fedf201e | 1888 | if (!zc) { |
e91de6af JF |
1889 | if (bpf_strp_enabled) { |
1890 | err = sk_psock_tls_strp_read(psock, skb); | |
1891 | if (err != __SK_PASS) { | |
1892 | rxm->offset = rxm->offset + rxm->full_len; | |
1893 | rxm->full_len = 0; | |
1894 | if (err == __SK_DROP) | |
1895 | consume_skb(skb); | |
1896 | ctx->recv_pkt = NULL; | |
1897 | __strp_unpause(&ctx->strp); | |
1898 | continue; | |
1899 | } | |
1900 | } | |
1901 | ||
fedf201e DW |
1902 | if (rxm->full_len > len) { |
1903 | retain_skb = true; | |
1904 | chunk = len; | |
1905 | } else { | |
1906 | chunk = rxm->full_len; | |
1907 | } | |
692d7b5d | 1908 | |
fedf201e DW |
1909 | err = skb_copy_datagram_msg(skb, rxm->offset, |
1910 | msg, chunk); | |
1911 | if (err < 0) | |
1912 | goto recv_end; | |
94524d8f | 1913 | |
fedf201e DW |
1914 | if (!is_peek) { |
1915 | rxm->offset = rxm->offset + chunk; | |
1916 | rxm->full_len = rxm->full_len - chunk; | |
692d7b5d | 1917 | } |
c46234eb DW |
1918 | } |
1919 | ||
94524d8f | 1920 | pick_next_record: |
692d7b5d VG |
1921 | if (chunk > len) |
1922 | chunk = len; | |
1923 | ||
1924 | decrypted += chunk; | |
c46234eb | 1925 | len -= chunk; |
692d7b5d VG |
1926 | |
1927 | /* For async or peek case, queue the current skb */ | |
1928 | if (async || is_peek || retain_skb) { | |
1929 | skb_queue_tail(&ctx->rx_list, skb); | |
1930 | skb = NULL; | |
1931 | } | |
1932 | ||
1933 | if (tls_sw_advance_skb(sk, skb, chunk)) { | |
1934 | /* Return full control message to | |
1935 | * userspace before trying to parse | |
1936 | * another message type | |
50c6b58a | 1937 | */ |
692d7b5d | 1938 | msg->msg_flags |= MSG_EOR; |
3fe16edf | 1939 | if (control != TLS_RECORD_TYPE_DATA) |
692d7b5d VG |
1940 | goto recv_end; |
1941 | } else { | |
50c6b58a | 1942 | break; |
c46234eb | 1943 | } |
04b25a54 | 1944 | } |
c46234eb DW |
1945 | |
1946 | recv_end: | |
94524d8f VG |
1947 | if (num_async) { |
1948 | /* Wait for all previously submitted records to be decrypted */ | |
0cada332 VKY |
1949 | spin_lock_bh(&ctx->decrypt_compl_lock); |
1950 | ctx->async_notify = true; | |
1951 | pending = atomic_read(&ctx->decrypt_pending); | |
1952 | spin_unlock_bh(&ctx->decrypt_compl_lock); | |
1953 | if (pending) { | |
94524d8f VG |
1954 | err = crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
1955 | if (err) { | |
1956 | /* one of async decrypt failed */ | |
1957 | tls_err_abort(sk, err); | |
1958 | copied = 0; | |
692d7b5d VG |
1959 | decrypted = 0; |
1960 | goto end; | |
94524d8f VG |
1961 | } |
1962 | } else { | |
1963 | reinit_completion(&ctx->async_wait.completion); | |
1964 | } | |
0cada332 VKY |
1965 | |
1966 | /* There can be no concurrent accesses, since we have no | |
1967 | * pending decrypt operations | |
1968 | */ | |
94524d8f | 1969 | WRITE_ONCE(ctx->async_notify, false); |
692d7b5d VG |
1970 | |
1971 | /* Drain records from the rx_list & copy if required */ | |
1972 | if (is_peek || is_kvec) | |
2b794c40 | 1973 | err = process_rx_list(ctx, msg, &control, &cmsg, copied, |
692d7b5d VG |
1974 | decrypted, false, is_peek); |
1975 | else | |
2b794c40 | 1976 | err = process_rx_list(ctx, msg, &control, &cmsg, 0, |
692d7b5d VG |
1977 | decrypted, true, is_peek); |
1978 | if (err < 0) { | |
1979 | tls_err_abort(sk, err); | |
1980 | copied = 0; | |
1981 | goto end; | |
1982 | } | |
94524d8f VG |
1983 | } |
1984 | ||
692d7b5d VG |
1985 | copied += decrypted; |
1986 | ||
1987 | end: | |
c46234eb | 1988 | release_sock(sk); |
ffef737f | 1989 | sk_defer_free_flush(sk); |
d3b18ad3 JF |
1990 | if (psock) |
1991 | sk_psock_put(sk, psock); | |
c46234eb DW |
1992 | return copied ? : err; |
1993 | } | |
1994 | ||
1995 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, | |
1996 | struct pipe_inode_info *pipe, | |
1997 | size_t len, unsigned int flags) | |
1998 | { | |
1999 | struct tls_context *tls_ctx = tls_get_ctx(sock->sk); | |
f66de3ee | 2000 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
c46234eb DW |
2001 | struct strp_msg *rxm = NULL; |
2002 | struct sock *sk = sock->sk; | |
c3f6bb74 | 2003 | struct tls_msg *tlm; |
c46234eb DW |
2004 | struct sk_buff *skb; |
2005 | ssize_t copied = 0; | |
e062fe99 | 2006 | bool from_queue; |
c46234eb DW |
2007 | int err = 0; |
2008 | long timeo; | |
2009 | int chunk; | |
0b243d00 | 2010 | bool zc = false; |
c46234eb DW |
2011 | |
2012 | lock_sock(sk); | |
2013 | ||
974271e5 | 2014 | timeo = sock_rcvtimeo(sk, flags & SPLICE_F_NONBLOCK); |
c46234eb | 2015 | |
e062fe99 JK |
2016 | from_queue = !skb_queue_empty(&ctx->rx_list); |
2017 | if (from_queue) { | |
2018 | skb = __skb_dequeue(&ctx->rx_list); | |
2019 | } else { | |
2020 | skb = tls_wait_data(sk, NULL, flags & SPLICE_F_NONBLOCK, timeo, | |
2021 | &err); | |
2022 | if (!skb) | |
2023 | goto splice_read_end; | |
c46234eb | 2024 | |
e062fe99 JK |
2025 | err = decrypt_skb_update(sk, skb, NULL, &chunk, &zc, false); |
2026 | if (err < 0) { | |
2027 | tls_err_abort(sk, -EBADMSG); | |
2028 | goto splice_read_end; | |
2029 | } | |
520493f6 | 2030 | } |
fedf201e | 2031 | |
c3f6bb74 JK |
2032 | rxm = strp_msg(skb); |
2033 | tlm = tls_msg(skb); | |
2034 | ||
520493f6 | 2035 | /* splice does not support reading control messages */ |
c3f6bb74 | 2036 | if (tlm->control != TLS_RECORD_TYPE_DATA) { |
520493f6 JK |
2037 | err = -EINVAL; |
2038 | goto splice_read_end; | |
c46234eb | 2039 | } |
520493f6 | 2040 | |
c46234eb DW |
2041 | chunk = min_t(unsigned int, rxm->full_len, len); |
2042 | copied = skb_splice_bits(skb, sk, rxm->offset, pipe, chunk, flags); | |
2043 | if (copied < 0) | |
2044 | goto splice_read_end; | |
2045 | ||
e062fe99 JK |
2046 | if (!from_queue) { |
2047 | ctx->recv_pkt = NULL; | |
2048 | __strp_unpause(&ctx->strp); | |
2049 | } | |
2050 | if (chunk < rxm->full_len) { | |
2051 | __skb_queue_head(&ctx->rx_list, skb); | |
2052 | rxm->offset += len; | |
2053 | rxm->full_len -= len; | |
2054 | } else { | |
2055 | consume_skb(skb); | |
2056 | } | |
c46234eb DW |
2057 | |
2058 | splice_read_end: | |
2059 | release_sock(sk); | |
db094aa8 | 2060 | sk_defer_free_flush(sk); |
c46234eb DW |
2061 | return copied ? : err; |
2062 | } | |
2063 | ||
7b50ecfc | 2064 | bool tls_sw_sock_is_readable(struct sock *sk) |
c46234eb | 2065 | { |
c46234eb | 2066 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
f66de3ee | 2067 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 JF |
2068 | bool ingress_empty = true; |
2069 | struct sk_psock *psock; | |
c46234eb | 2070 | |
d3b18ad3 JF |
2071 | rcu_read_lock(); |
2072 | psock = sk_psock(sk); | |
2073 | if (psock) | |
2074 | ingress_empty = list_empty(&psock->ingress_msg); | |
2075 | rcu_read_unlock(); | |
c46234eb | 2076 | |
13aecb17 JK |
2077 | return !ingress_empty || ctx->recv_pkt || |
2078 | !skb_queue_empty(&ctx->rx_list); | |
c46234eb DW |
2079 | } |
2080 | ||
2081 | static int tls_read_size(struct strparser *strp, struct sk_buff *skb) | |
2082 | { | |
2083 | struct tls_context *tls_ctx = tls_get_ctx(strp->sk); | |
4509de14 | 2084 | struct tls_prot_info *prot = &tls_ctx->prot_info; |
3463e51d | 2085 | char header[TLS_HEADER_SIZE + MAX_IV_SIZE]; |
c46234eb | 2086 | struct strp_msg *rxm = strp_msg(skb); |
c3f6bb74 | 2087 | struct tls_msg *tlm = tls_msg(skb); |
c46234eb DW |
2088 | size_t cipher_overhead; |
2089 | size_t data_len = 0; | |
2090 | int ret; | |
2091 | ||
2092 | /* Verify that we have a full TLS header, or wait for more data */ | |
4509de14 | 2093 | if (rxm->offset + prot->prepend_size > skb->len) |
c46234eb DW |
2094 | return 0; |
2095 | ||
3463e51d | 2096 | /* Sanity-check size of on-stack buffer. */ |
4509de14 | 2097 | if (WARN_ON(prot->prepend_size > sizeof(header))) { |
3463e51d KC |
2098 | ret = -EINVAL; |
2099 | goto read_failure; | |
2100 | } | |
2101 | ||
c46234eb | 2102 | /* Linearize header to local buffer */ |
4509de14 | 2103 | ret = skb_copy_bits(skb, rxm->offset, header, prot->prepend_size); |
c46234eb DW |
2104 | |
2105 | if (ret < 0) | |
2106 | goto read_failure; | |
2107 | ||
c3f6bb74 | 2108 | tlm->control = header[0]; |
c46234eb DW |
2109 | |
2110 | data_len = ((header[4] & 0xFF) | (header[3] << 8)); | |
2111 | ||
4509de14 | 2112 | cipher_overhead = prot->tag_size; |
a6acbe62 VF |
2113 | if (prot->version != TLS_1_3_VERSION && |
2114 | prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) | |
4509de14 | 2115 | cipher_overhead += prot->iv_size; |
c46234eb | 2116 | |
130b392c | 2117 | if (data_len > TLS_MAX_PAYLOAD_SIZE + cipher_overhead + |
4509de14 | 2118 | prot->tail_size) { |
c46234eb DW |
2119 | ret = -EMSGSIZE; |
2120 | goto read_failure; | |
2121 | } | |
2122 | if (data_len < cipher_overhead) { | |
2123 | ret = -EBADMSG; | |
2124 | goto read_failure; | |
2125 | } | |
2126 | ||
130b392c DW |
2127 | /* Note that both TLS1.3 and TLS1.2 use TLS_1_2 version here */ |
2128 | if (header[1] != TLS_1_2_VERSION_MINOR || | |
2129 | header[2] != TLS_1_2_VERSION_MAJOR) { | |
c46234eb DW |
2130 | ret = -EINVAL; |
2131 | goto read_failure; | |
2132 | } | |
be2fbc15 | 2133 | |
f953d33b | 2134 | tls_device_rx_resync_new_rec(strp->sk, data_len + TLS_HEADER_SIZE, |
fe58a5a0 | 2135 | TCP_SKB_CB(skb)->seq + rxm->offset); |
c46234eb DW |
2136 | return data_len + TLS_HEADER_SIZE; |
2137 | ||
2138 | read_failure: | |
2139 | tls_err_abort(strp->sk, ret); | |
2140 | ||
2141 | return ret; | |
2142 | } | |
2143 | ||
2144 | static void tls_queue(struct strparser *strp, struct sk_buff *skb) | |
2145 | { | |
2146 | struct tls_context *tls_ctx = tls_get_ctx(strp->sk); | |
f66de3ee | 2147 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
7dc59c33 | 2148 | struct tls_msg *tlm = tls_msg(skb); |
c46234eb | 2149 | |
7dc59c33 | 2150 | tlm->decrypted = 0; |
c46234eb DW |
2151 | |
2152 | ctx->recv_pkt = skb; | |
2153 | strp_pause(strp); | |
2154 | ||
ad13acce | 2155 | ctx->saved_data_ready(strp->sk); |
c46234eb DW |
2156 | } |
2157 | ||
2158 | static void tls_data_ready(struct sock *sk) | |
2159 | { | |
2160 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 2161 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
d3b18ad3 | 2162 | struct sk_psock *psock; |
c46234eb DW |
2163 | |
2164 | strp_data_ready(&ctx->strp); | |
d3b18ad3 JF |
2165 | |
2166 | psock = sk_psock_get(sk); | |
62b4011f XY |
2167 | if (psock) { |
2168 | if (!list_empty(&psock->ingress_msg)) | |
2169 | ctx->saved_data_ready(sk); | |
d3b18ad3 JF |
2170 | sk_psock_put(sk, psock); |
2171 | } | |
c46234eb DW |
2172 | } |
2173 | ||
f87e62d4 JF |
2174 | void tls_sw_cancel_work_tx(struct tls_context *tls_ctx) |
2175 | { | |
2176 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
2177 | ||
2178 | set_bit(BIT_TX_CLOSING, &ctx->tx_bitmask); | |
2179 | set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask); | |
2180 | cancel_delayed_work_sync(&ctx->tx_work.work); | |
2181 | } | |
2182 | ||
313ab004 | 2183 | void tls_sw_release_resources_tx(struct sock *sk) |
3c4d7559 DW |
2184 | { |
2185 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f66de3ee | 2186 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); |
a42055e8 | 2187 | struct tls_rec *rec, *tmp; |
38f7e1c0 | 2188 | int pending; |
a42055e8 VG |
2189 | |
2190 | /* Wait for any pending async encryptions to complete */ | |
38f7e1c0 RM |
2191 | spin_lock_bh(&ctx->encrypt_compl_lock); |
2192 | ctx->async_notify = true; | |
2193 | pending = atomic_read(&ctx->encrypt_pending); | |
2194 | spin_unlock_bh(&ctx->encrypt_compl_lock); | |
2195 | ||
2196 | if (pending) | |
a42055e8 VG |
2197 | crypto_wait_req(-EINPROGRESS, &ctx->async_wait); |
2198 | ||
a42055e8 VG |
2199 | tls_tx_records(sk, -1); |
2200 | ||
9932a29a | 2201 | /* Free up un-sent records in tx_list. First, free |
a42055e8 VG |
2202 | * the partially sent record if any at head of tx_list. |
2203 | */ | |
c5daa6cc JK |
2204 | if (tls_ctx->partially_sent_record) { |
2205 | tls_free_partial_record(sk, tls_ctx); | |
9932a29a | 2206 | rec = list_first_entry(&ctx->tx_list, |
a42055e8 VG |
2207 | struct tls_rec, list); |
2208 | list_del(&rec->list); | |
d829e9c4 | 2209 | sk_msg_free(sk, &rec->msg_plaintext); |
a42055e8 VG |
2210 | kfree(rec); |
2211 | } | |
2212 | ||
9932a29a | 2213 | list_for_each_entry_safe(rec, tmp, &ctx->tx_list, list) { |
a42055e8 | 2214 | list_del(&rec->list); |
d829e9c4 DB |
2215 | sk_msg_free(sk, &rec->msg_encrypted); |
2216 | sk_msg_free(sk, &rec->msg_plaintext); | |
a42055e8 VG |
2217 | kfree(rec); |
2218 | } | |
3c4d7559 | 2219 | |
201876b3 | 2220 | crypto_free_aead(ctx->aead_send); |
c774973e | 2221 | tls_free_open_rec(sk); |
313ab004 JF |
2222 | } |
2223 | ||
2224 | void tls_sw_free_ctx_tx(struct tls_context *tls_ctx) | |
2225 | { | |
2226 | struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); | |
f66de3ee BP |
2227 | |
2228 | kfree(ctx); | |
2229 | } | |
2230 | ||
39f56e1a | 2231 | void tls_sw_release_resources_rx(struct sock *sk) |
f66de3ee BP |
2232 | { |
2233 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
2234 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
2235 | ||
12c76861 JK |
2236 | kfree(tls_ctx->rx.rec_seq); |
2237 | kfree(tls_ctx->rx.iv); | |
2238 | ||
c46234eb | 2239 | if (ctx->aead_recv) { |
201876b3 VG |
2240 | kfree_skb(ctx->recv_pkt); |
2241 | ctx->recv_pkt = NULL; | |
692d7b5d | 2242 | skb_queue_purge(&ctx->rx_list); |
c46234eb DW |
2243 | crypto_free_aead(ctx->aead_recv); |
2244 | strp_stop(&ctx->strp); | |
313ab004 JF |
2245 | /* If tls_sw_strparser_arm() was not called (cleanup paths) |
2246 | * we still want to strp_stop(), but sk->sk_data_ready was | |
2247 | * never swapped. | |
2248 | */ | |
2249 | if (ctx->saved_data_ready) { | |
2250 | write_lock_bh(&sk->sk_callback_lock); | |
2251 | sk->sk_data_ready = ctx->saved_data_ready; | |
2252 | write_unlock_bh(&sk->sk_callback_lock); | |
2253 | } | |
c46234eb | 2254 | } |
39f56e1a BP |
2255 | } |
2256 | ||
313ab004 | 2257 | void tls_sw_strparser_done(struct tls_context *tls_ctx) |
39f56e1a | 2258 | { |
39f56e1a BP |
2259 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); |
2260 | ||
313ab004 JF |
2261 | strp_done(&ctx->strp); |
2262 | } | |
2263 | ||
2264 | void tls_sw_free_ctx_rx(struct tls_context *tls_ctx) | |
2265 | { | |
2266 | struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx); | |
3c4d7559 | 2267 | |
3c4d7559 DW |
2268 | kfree(ctx); |
2269 | } | |
2270 | ||
313ab004 JF |
2271 | void tls_sw_free_resources_rx(struct sock *sk) |
2272 | { | |
2273 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
2274 | ||
2275 | tls_sw_release_resources_rx(sk); | |
2276 | tls_sw_free_ctx_rx(tls_ctx); | |
2277 | } | |
2278 | ||
9932a29a | 2279 | /* The work handler to transmitt the encrypted records in tx_list */ |
a42055e8 VG |
2280 | static void tx_work_handler(struct work_struct *work) |
2281 | { | |
2282 | struct delayed_work *delayed_work = to_delayed_work(work); | |
2283 | struct tx_work *tx_work = container_of(delayed_work, | |
2284 | struct tx_work, work); | |
2285 | struct sock *sk = tx_work->sk; | |
2286 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
f87e62d4 | 2287 | struct tls_sw_context_tx *ctx; |
a42055e8 | 2288 | |
f87e62d4 | 2289 | if (unlikely(!tls_ctx)) |
a42055e8 VG |
2290 | return; |
2291 | ||
f87e62d4 JF |
2292 | ctx = tls_sw_ctx_tx(tls_ctx); |
2293 | if (test_bit(BIT_TX_CLOSING, &ctx->tx_bitmask)) | |
2294 | return; | |
2295 | ||
2296 | if (!test_and_clear_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask)) | |
2297 | return; | |
79ffe608 | 2298 | mutex_lock(&tls_ctx->tx_lock); |
a42055e8 VG |
2299 | lock_sock(sk); |
2300 | tls_tx_records(sk, -1); | |
2301 | release_sock(sk); | |
79ffe608 | 2302 | mutex_unlock(&tls_ctx->tx_lock); |
a42055e8 VG |
2303 | } |
2304 | ||
7463d3a2 BP |
2305 | void tls_sw_write_space(struct sock *sk, struct tls_context *ctx) |
2306 | { | |
2307 | struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx); | |
2308 | ||
2309 | /* Schedule the transmission if tx list is ready */ | |
02b1fa07 JK |
2310 | if (is_tx_ready(tx_ctx) && |
2311 | !test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask)) | |
2312 | schedule_delayed_work(&tx_ctx->tx_work.work, 0); | |
7463d3a2 BP |
2313 | } |
2314 | ||
318892ac JK |
2315 | void tls_sw_strparser_arm(struct sock *sk, struct tls_context *tls_ctx) |
2316 | { | |
2317 | struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(tls_ctx); | |
2318 | ||
2319 | write_lock_bh(&sk->sk_callback_lock); | |
2320 | rx_ctx->saved_data_ready = sk->sk_data_ready; | |
2321 | sk->sk_data_ready = tls_data_ready; | |
2322 | write_unlock_bh(&sk->sk_callback_lock); | |
2323 | ||
2324 | strp_check_rcv(&rx_ctx->strp); | |
2325 | } | |
2326 | ||
c46234eb | 2327 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx) |
3c4d7559 | 2328 | { |
4509de14 VG |
2329 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
2330 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
3c4d7559 | 2331 | struct tls_crypto_info *crypto_info; |
f66de3ee BP |
2332 | struct tls_sw_context_tx *sw_ctx_tx = NULL; |
2333 | struct tls_sw_context_rx *sw_ctx_rx = NULL; | |
c46234eb DW |
2334 | struct cipher_context *cctx; |
2335 | struct crypto_aead **aead; | |
2336 | struct strp_callbacks cb; | |
f295b3ae | 2337 | u16 nonce_size, tag_size, iv_size, rec_seq_size, salt_size; |
692d7b5d | 2338 | struct crypto_tfm *tfm; |
f295b3ae | 2339 | char *iv, *rec_seq, *key, *salt, *cipher_name; |
fb99bce7 | 2340 | size_t keysize; |
3c4d7559 DW |
2341 | int rc = 0; |
2342 | ||
2343 | if (!ctx) { | |
2344 | rc = -EINVAL; | |
2345 | goto out; | |
2346 | } | |
2347 | ||
f66de3ee | 2348 | if (tx) { |
b190a587 BP |
2349 | if (!ctx->priv_ctx_tx) { |
2350 | sw_ctx_tx = kzalloc(sizeof(*sw_ctx_tx), GFP_KERNEL); | |
2351 | if (!sw_ctx_tx) { | |
2352 | rc = -ENOMEM; | |
2353 | goto out; | |
2354 | } | |
2355 | ctx->priv_ctx_tx = sw_ctx_tx; | |
2356 | } else { | |
2357 | sw_ctx_tx = | |
2358 | (struct tls_sw_context_tx *)ctx->priv_ctx_tx; | |
c46234eb | 2359 | } |
c46234eb | 2360 | } else { |
b190a587 BP |
2361 | if (!ctx->priv_ctx_rx) { |
2362 | sw_ctx_rx = kzalloc(sizeof(*sw_ctx_rx), GFP_KERNEL); | |
2363 | if (!sw_ctx_rx) { | |
2364 | rc = -ENOMEM; | |
2365 | goto out; | |
2366 | } | |
2367 | ctx->priv_ctx_rx = sw_ctx_rx; | |
2368 | } else { | |
2369 | sw_ctx_rx = | |
2370 | (struct tls_sw_context_rx *)ctx->priv_ctx_rx; | |
f66de3ee | 2371 | } |
3c4d7559 DW |
2372 | } |
2373 | ||
c46234eb | 2374 | if (tx) { |
b190a587 | 2375 | crypto_init_wait(&sw_ctx_tx->async_wait); |
0cada332 | 2376 | spin_lock_init(&sw_ctx_tx->encrypt_compl_lock); |
86029d10 | 2377 | crypto_info = &ctx->crypto_send.info; |
c46234eb | 2378 | cctx = &ctx->tx; |
f66de3ee | 2379 | aead = &sw_ctx_tx->aead_send; |
9932a29a | 2380 | INIT_LIST_HEAD(&sw_ctx_tx->tx_list); |
a42055e8 VG |
2381 | INIT_DELAYED_WORK(&sw_ctx_tx->tx_work.work, tx_work_handler); |
2382 | sw_ctx_tx->tx_work.sk = sk; | |
c46234eb | 2383 | } else { |
b190a587 | 2384 | crypto_init_wait(&sw_ctx_rx->async_wait); |
0cada332 | 2385 | spin_lock_init(&sw_ctx_rx->decrypt_compl_lock); |
86029d10 | 2386 | crypto_info = &ctx->crypto_recv.info; |
c46234eb | 2387 | cctx = &ctx->rx; |
692d7b5d | 2388 | skb_queue_head_init(&sw_ctx_rx->rx_list); |
f66de3ee | 2389 | aead = &sw_ctx_rx->aead_recv; |
c46234eb DW |
2390 | } |
2391 | ||
3c4d7559 DW |
2392 | switch (crypto_info->cipher_type) { |
2393 | case TLS_CIPHER_AES_GCM_128: { | |
dc2724a6 TZ |
2394 | struct tls12_crypto_info_aes_gcm_128 *gcm_128_info; |
2395 | ||
2396 | gcm_128_info = (void *)crypto_info; | |
3c4d7559 DW |
2397 | nonce_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; |
2398 | tag_size = TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
2399 | iv_size = TLS_CIPHER_AES_GCM_128_IV_SIZE; | |
dc2724a6 | 2400 | iv = gcm_128_info->iv; |
3c4d7559 | 2401 | rec_seq_size = TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE; |
dc2724a6 | 2402 | rec_seq = gcm_128_info->rec_seq; |
fb99bce7 DW |
2403 | keysize = TLS_CIPHER_AES_GCM_128_KEY_SIZE; |
2404 | key = gcm_128_info->key; | |
2405 | salt = gcm_128_info->salt; | |
f295b3ae VG |
2406 | salt_size = TLS_CIPHER_AES_GCM_128_SALT_SIZE; |
2407 | cipher_name = "gcm(aes)"; | |
fb99bce7 DW |
2408 | break; |
2409 | } | |
2410 | case TLS_CIPHER_AES_GCM_256: { | |
dc2724a6 TZ |
2411 | struct tls12_crypto_info_aes_gcm_256 *gcm_256_info; |
2412 | ||
2413 | gcm_256_info = (void *)crypto_info; | |
fb99bce7 DW |
2414 | nonce_size = TLS_CIPHER_AES_GCM_256_IV_SIZE; |
2415 | tag_size = TLS_CIPHER_AES_GCM_256_TAG_SIZE; | |
2416 | iv_size = TLS_CIPHER_AES_GCM_256_IV_SIZE; | |
dc2724a6 | 2417 | iv = gcm_256_info->iv; |
fb99bce7 | 2418 | rec_seq_size = TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE; |
dc2724a6 | 2419 | rec_seq = gcm_256_info->rec_seq; |
fb99bce7 DW |
2420 | keysize = TLS_CIPHER_AES_GCM_256_KEY_SIZE; |
2421 | key = gcm_256_info->key; | |
2422 | salt = gcm_256_info->salt; | |
f295b3ae VG |
2423 | salt_size = TLS_CIPHER_AES_GCM_256_SALT_SIZE; |
2424 | cipher_name = "gcm(aes)"; | |
2425 | break; | |
2426 | } | |
2427 | case TLS_CIPHER_AES_CCM_128: { | |
dc2724a6 TZ |
2428 | struct tls12_crypto_info_aes_ccm_128 *ccm_128_info; |
2429 | ||
2430 | ccm_128_info = (void *)crypto_info; | |
f295b3ae VG |
2431 | nonce_size = TLS_CIPHER_AES_CCM_128_IV_SIZE; |
2432 | tag_size = TLS_CIPHER_AES_CCM_128_TAG_SIZE; | |
2433 | iv_size = TLS_CIPHER_AES_CCM_128_IV_SIZE; | |
dc2724a6 | 2434 | iv = ccm_128_info->iv; |
f295b3ae | 2435 | rec_seq_size = TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE; |
dc2724a6 | 2436 | rec_seq = ccm_128_info->rec_seq; |
f295b3ae VG |
2437 | keysize = TLS_CIPHER_AES_CCM_128_KEY_SIZE; |
2438 | key = ccm_128_info->key; | |
2439 | salt = ccm_128_info->salt; | |
2440 | salt_size = TLS_CIPHER_AES_CCM_128_SALT_SIZE; | |
2441 | cipher_name = "ccm(aes)"; | |
3c4d7559 DW |
2442 | break; |
2443 | } | |
74ea6106 | 2444 | case TLS_CIPHER_CHACHA20_POLY1305: { |
dc2724a6 TZ |
2445 | struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305_info; |
2446 | ||
74ea6106 VF |
2447 | chacha20_poly1305_info = (void *)crypto_info; |
2448 | nonce_size = 0; | |
2449 | tag_size = TLS_CIPHER_CHACHA20_POLY1305_TAG_SIZE; | |
2450 | iv_size = TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE; | |
2451 | iv = chacha20_poly1305_info->iv; | |
2452 | rec_seq_size = TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE; | |
2453 | rec_seq = chacha20_poly1305_info->rec_seq; | |
2454 | keysize = TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE; | |
2455 | key = chacha20_poly1305_info->key; | |
2456 | salt = chacha20_poly1305_info->salt; | |
2457 | salt_size = TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE; | |
2458 | cipher_name = "rfc7539(chacha20,poly1305)"; | |
2459 | break; | |
2460 | } | |
227b9644 TZ |
2461 | case TLS_CIPHER_SM4_GCM: { |
2462 | struct tls12_crypto_info_sm4_gcm *sm4_gcm_info; | |
2463 | ||
2464 | sm4_gcm_info = (void *)crypto_info; | |
2465 | nonce_size = TLS_CIPHER_SM4_GCM_IV_SIZE; | |
2466 | tag_size = TLS_CIPHER_SM4_GCM_TAG_SIZE; | |
2467 | iv_size = TLS_CIPHER_SM4_GCM_IV_SIZE; | |
2468 | iv = sm4_gcm_info->iv; | |
2469 | rec_seq_size = TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE; | |
2470 | rec_seq = sm4_gcm_info->rec_seq; | |
2471 | keysize = TLS_CIPHER_SM4_GCM_KEY_SIZE; | |
2472 | key = sm4_gcm_info->key; | |
2473 | salt = sm4_gcm_info->salt; | |
2474 | salt_size = TLS_CIPHER_SM4_GCM_SALT_SIZE; | |
2475 | cipher_name = "gcm(sm4)"; | |
2476 | break; | |
2477 | } | |
2478 | case TLS_CIPHER_SM4_CCM: { | |
2479 | struct tls12_crypto_info_sm4_ccm *sm4_ccm_info; | |
2480 | ||
2481 | sm4_ccm_info = (void *)crypto_info; | |
2482 | nonce_size = TLS_CIPHER_SM4_CCM_IV_SIZE; | |
2483 | tag_size = TLS_CIPHER_SM4_CCM_TAG_SIZE; | |
2484 | iv_size = TLS_CIPHER_SM4_CCM_IV_SIZE; | |
2485 | iv = sm4_ccm_info->iv; | |
2486 | rec_seq_size = TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE; | |
2487 | rec_seq = sm4_ccm_info->rec_seq; | |
2488 | keysize = TLS_CIPHER_SM4_CCM_KEY_SIZE; | |
2489 | key = sm4_ccm_info->key; | |
2490 | salt = sm4_ccm_info->salt; | |
2491 | salt_size = TLS_CIPHER_SM4_CCM_SALT_SIZE; | |
2492 | cipher_name = "ccm(sm4)"; | |
2493 | break; | |
2494 | } | |
3c4d7559 DW |
2495 | default: |
2496 | rc = -EINVAL; | |
cf6d43ef | 2497 | goto free_priv; |
3c4d7559 DW |
2498 | } |
2499 | ||
89fec474 JK |
2500 | /* Sanity-check the sizes for stack allocations. */ |
2501 | if (iv_size > MAX_IV_SIZE || nonce_size > MAX_IV_SIZE || | |
2502 | rec_seq_size > TLS_MAX_REC_SEQ_SIZE) { | |
b16520f7 KC |
2503 | rc = -EINVAL; |
2504 | goto free_priv; | |
2505 | } | |
2506 | ||
130b392c DW |
2507 | if (crypto_info->version == TLS_1_3_VERSION) { |
2508 | nonce_size = 0; | |
4509de14 VG |
2509 | prot->aad_size = TLS_HEADER_SIZE; |
2510 | prot->tail_size = 1; | |
130b392c | 2511 | } else { |
4509de14 VG |
2512 | prot->aad_size = TLS_AAD_SPACE_SIZE; |
2513 | prot->tail_size = 0; | |
130b392c DW |
2514 | } |
2515 | ||
4509de14 VG |
2516 | prot->version = crypto_info->version; |
2517 | prot->cipher_type = crypto_info->cipher_type; | |
2518 | prot->prepend_size = TLS_HEADER_SIZE + nonce_size; | |
2519 | prot->tag_size = tag_size; | |
2520 | prot->overhead_size = prot->prepend_size + | |
2521 | prot->tag_size + prot->tail_size; | |
2522 | prot->iv_size = iv_size; | |
f295b3ae VG |
2523 | prot->salt_size = salt_size; |
2524 | cctx->iv = kmalloc(iv_size + salt_size, GFP_KERNEL); | |
c46234eb | 2525 | if (!cctx->iv) { |
3c4d7559 | 2526 | rc = -ENOMEM; |
cf6d43ef | 2527 | goto free_priv; |
3c4d7559 | 2528 | } |
fb99bce7 | 2529 | /* Note: 128 & 256 bit salt are the same size */ |
4509de14 | 2530 | prot->rec_seq_size = rec_seq_size; |
f295b3ae VG |
2531 | memcpy(cctx->iv, salt, salt_size); |
2532 | memcpy(cctx->iv + salt_size, iv, iv_size); | |
969d5090 | 2533 | cctx->rec_seq = kmemdup(rec_seq, rec_seq_size, GFP_KERNEL); |
c46234eb | 2534 | if (!cctx->rec_seq) { |
3c4d7559 DW |
2535 | rc = -ENOMEM; |
2536 | goto free_iv; | |
2537 | } | |
c46234eb | 2538 | |
c46234eb | 2539 | if (!*aead) { |
f295b3ae | 2540 | *aead = crypto_alloc_aead(cipher_name, 0, 0); |
c46234eb DW |
2541 | if (IS_ERR(*aead)) { |
2542 | rc = PTR_ERR(*aead); | |
2543 | *aead = NULL; | |
3c4d7559 DW |
2544 | goto free_rec_seq; |
2545 | } | |
2546 | } | |
2547 | ||
2548 | ctx->push_pending_record = tls_sw_push_pending_record; | |
2549 | ||
fb99bce7 DW |
2550 | rc = crypto_aead_setkey(*aead, key, keysize); |
2551 | ||
3c4d7559 DW |
2552 | if (rc) |
2553 | goto free_aead; | |
2554 | ||
4509de14 | 2555 | rc = crypto_aead_setauthsize(*aead, prot->tag_size); |
c46234eb DW |
2556 | if (rc) |
2557 | goto free_aead; | |
2558 | ||
f66de3ee | 2559 | if (sw_ctx_rx) { |
692d7b5d | 2560 | tfm = crypto_aead_tfm(sw_ctx_rx->aead_recv); |
8497ded2 VG |
2561 | |
2562 | if (crypto_info->version == TLS_1_3_VERSION) | |
5c5458ec | 2563 | sw_ctx_rx->async_capable = 0; |
8497ded2 VG |
2564 | else |
2565 | sw_ctx_rx->async_capable = | |
5c5458ec JK |
2566 | !!(tfm->__crt_alg->cra_flags & |
2567 | CRYPTO_ALG_ASYNC); | |
692d7b5d | 2568 | |
c46234eb DW |
2569 | /* Set up strparser */ |
2570 | memset(&cb, 0, sizeof(cb)); | |
2571 | cb.rcv_msg = tls_queue; | |
2572 | cb.parse_msg = tls_read_size; | |
2573 | ||
f66de3ee | 2574 | strp_init(&sw_ctx_rx->strp, sk, &cb); |
c46234eb DW |
2575 | } |
2576 | ||
2577 | goto out; | |
3c4d7559 DW |
2578 | |
2579 | free_aead: | |
c46234eb DW |
2580 | crypto_free_aead(*aead); |
2581 | *aead = NULL; | |
3c4d7559 | 2582 | free_rec_seq: |
c46234eb DW |
2583 | kfree(cctx->rec_seq); |
2584 | cctx->rec_seq = NULL; | |
3c4d7559 | 2585 | free_iv: |
f66de3ee BP |
2586 | kfree(cctx->iv); |
2587 | cctx->iv = NULL; | |
cf6d43ef | 2588 | free_priv: |
f66de3ee BP |
2589 | if (tx) { |
2590 | kfree(ctx->priv_ctx_tx); | |
2591 | ctx->priv_ctx_tx = NULL; | |
2592 | } else { | |
2593 | kfree(ctx->priv_ctx_rx); | |
2594 | ctx->priv_ctx_rx = NULL; | |
2595 | } | |
3c4d7559 DW |
2596 | out: |
2597 | return rc; | |
2598 | } |