Commit | Line | Data |
---|---|---|
e8f69799 IL |
1 | /* Copyright (c) 2018, Mellanox Technologies All rights reserved. |
2 | * | |
3 | * This software is available to you under a choice of one of two | |
4 | * licenses. You may choose to be licensed under the terms of the GNU | |
5 | * General Public License (GPL) Version 2, available from the file | |
6 | * COPYING in the main directory of this source tree, or the | |
7 | * OpenIB.org BSD license below: | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or | |
10 | * without modification, are permitted provided that the following | |
11 | * conditions are met: | |
12 | * | |
13 | * - Redistributions of source code must retain the above | |
14 | * copyright notice, this list of conditions and the following | |
15 | * disclaimer. | |
16 | * | |
17 | * - Redistributions in binary form must reproduce the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer in the documentation and/or other materials | |
20 | * provided with the distribution. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
23 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
24 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
25 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
26 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
27 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
28 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
29 | * SOFTWARE. | |
30 | */ | |
31 | ||
32 | #include <net/tls.h> | |
33 | #include <crypto/aead.h> | |
34 | #include <crypto/scatterwalk.h> | |
35 | #include <net/ip6_checksum.h> | |
36 | ||
58790314 JK |
37 | #include "tls.h" |
38 | ||
e8f69799 IL |
39 | static void chain_to_walk(struct scatterlist *sg, struct scatter_walk *walk) |
40 | { | |
41 | struct scatterlist *src = walk->sg; | |
42 | int diff = walk->offset - src->offset; | |
43 | ||
44 | sg_set_page(sg, sg_page(src), | |
45 | src->length - diff, walk->offset); | |
46 | ||
8c30fbe6 | 47 | scatterwalk_crypto_chain(sg, sg_next(src), 2); |
e8f69799 IL |
48 | } |
49 | ||
50 | static int tls_enc_record(struct aead_request *aead_req, | |
51 | struct crypto_aead *aead, char *aad, | |
52 | char *iv, __be64 rcd_sn, | |
53 | struct scatter_walk *in, | |
6942a284 VF |
54 | struct scatter_walk *out, int *in_len, |
55 | struct tls_prot_info *prot) | |
e8f69799 | 56 | { |
ea7a9d88 GP |
57 | unsigned char buf[TLS_HEADER_SIZE + MAX_IV_SIZE]; |
58 | const struct tls_cipher_size_desc *cipher_sz; | |
e8f69799 IL |
59 | struct scatterlist sg_in[3]; |
60 | struct scatterlist sg_out[3]; | |
ea7a9d88 | 61 | unsigned int buf_size; |
e8f69799 IL |
62 | u16 len; |
63 | int rc; | |
64 | ||
ea7a9d88 GP |
65 | switch (prot->cipher_type) { |
66 | case TLS_CIPHER_AES_GCM_128: | |
56e5a6d3 | 67 | case TLS_CIPHER_AES_GCM_256: |
ea7a9d88 GP |
68 | break; |
69 | default: | |
70 | return -EINVAL; | |
71 | } | |
72 | cipher_sz = &tls_cipher_size_desc[prot->cipher_type]; | |
73 | ||
74 | buf_size = TLS_HEADER_SIZE + cipher_sz->iv; | |
75 | len = min_t(int, *in_len, buf_size); | |
e8f69799 IL |
76 | |
77 | scatterwalk_copychunks(buf, in, len, 0); | |
78 | scatterwalk_copychunks(buf, out, len, 1); | |
79 | ||
80 | *in_len -= len; | |
81 | if (!*in_len) | |
82 | return 0; | |
83 | ||
84 | scatterwalk_pagedone(in, 0, 1); | |
85 | scatterwalk_pagedone(out, 1, 1); | |
86 | ||
87 | len = buf[4] | (buf[3] << 8); | |
ea7a9d88 | 88 | len -= cipher_sz->iv; |
e8f69799 | 89 | |
ea7a9d88 | 90 | tls_make_aad(aad, len - cipher_sz->tag, (char *)&rcd_sn, buf[0], prot); |
e8f69799 | 91 | |
ea7a9d88 | 92 | memcpy(iv + cipher_sz->salt, buf + TLS_HEADER_SIZE, cipher_sz->iv); |
e8f69799 IL |
93 | |
94 | sg_init_table(sg_in, ARRAY_SIZE(sg_in)); | |
95 | sg_init_table(sg_out, ARRAY_SIZE(sg_out)); | |
96 | sg_set_buf(sg_in, aad, TLS_AAD_SPACE_SIZE); | |
97 | sg_set_buf(sg_out, aad, TLS_AAD_SPACE_SIZE); | |
98 | chain_to_walk(sg_in + 1, in); | |
99 | chain_to_walk(sg_out + 1, out); | |
100 | ||
101 | *in_len -= len; | |
102 | if (*in_len < 0) { | |
ea7a9d88 | 103 | *in_len += cipher_sz->tag; |
e8f69799 IL |
104 | /* the input buffer doesn't contain the entire record. |
105 | * trim len accordingly. The resulting authentication tag | |
106 | * will contain garbage, but we don't care, so we won't | |
107 | * include any of it in the output skb | |
108 | * Note that we assume the output buffer length | |
109 | * is larger then input buffer length + tag size | |
110 | */ | |
111 | if (*in_len < 0) | |
112 | len += *in_len; | |
113 | ||
114 | *in_len = 0; | |
115 | } | |
116 | ||
117 | if (*in_len) { | |
118 | scatterwalk_copychunks(NULL, in, len, 2); | |
119 | scatterwalk_pagedone(in, 0, 1); | |
120 | scatterwalk_copychunks(NULL, out, len, 2); | |
121 | scatterwalk_pagedone(out, 1, 1); | |
122 | } | |
123 | ||
ea7a9d88 | 124 | len -= cipher_sz->tag; |
e8f69799 IL |
125 | aead_request_set_crypt(aead_req, sg_in, sg_out, len, iv); |
126 | ||
127 | rc = crypto_aead_encrypt(aead_req); | |
128 | ||
129 | return rc; | |
130 | } | |
131 | ||
132 | static void tls_init_aead_request(struct aead_request *aead_req, | |
133 | struct crypto_aead *aead) | |
134 | { | |
135 | aead_request_set_tfm(aead_req, aead); | |
136 | aead_request_set_ad(aead_req, TLS_AAD_SPACE_SIZE); | |
137 | } | |
138 | ||
139 | static struct aead_request *tls_alloc_aead_request(struct crypto_aead *aead, | |
140 | gfp_t flags) | |
141 | { | |
142 | unsigned int req_size = sizeof(struct aead_request) + | |
143 | crypto_aead_reqsize(aead); | |
144 | struct aead_request *aead_req; | |
145 | ||
146 | aead_req = kzalloc(req_size, flags); | |
147 | if (aead_req) | |
148 | tls_init_aead_request(aead_req, aead); | |
149 | return aead_req; | |
150 | } | |
151 | ||
152 | static int tls_enc_records(struct aead_request *aead_req, | |
153 | struct crypto_aead *aead, struct scatterlist *sg_in, | |
154 | struct scatterlist *sg_out, char *aad, char *iv, | |
6942a284 | 155 | u64 rcd_sn, int len, struct tls_prot_info *prot) |
e8f69799 IL |
156 | { |
157 | struct scatter_walk out, in; | |
158 | int rc; | |
159 | ||
160 | scatterwalk_start(&in, sg_in); | |
161 | scatterwalk_start(&out, sg_out); | |
162 | ||
163 | do { | |
164 | rc = tls_enc_record(aead_req, aead, aad, iv, | |
6942a284 | 165 | cpu_to_be64(rcd_sn), &in, &out, &len, prot); |
e8f69799 IL |
166 | rcd_sn++; |
167 | ||
168 | } while (rc == 0 && len); | |
169 | ||
170 | scatterwalk_done(&in, 0, 0); | |
171 | scatterwalk_done(&out, 1, 0); | |
172 | ||
173 | return rc; | |
174 | } | |
175 | ||
176 | /* Can't use icsk->icsk_af_ops->send_check here because the ip addresses | |
177 | * might have been changed by NAT. | |
178 | */ | |
179 | static void update_chksum(struct sk_buff *skb, int headln) | |
180 | { | |
181 | struct tcphdr *th = tcp_hdr(skb); | |
182 | int datalen = skb->len - headln; | |
183 | const struct ipv6hdr *ipv6h; | |
184 | const struct iphdr *iph; | |
185 | ||
186 | /* We only changed the payload so if we are using partial we don't | |
187 | * need to update anything. | |
188 | */ | |
189 | if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) | |
190 | return; | |
191 | ||
192 | skb->ip_summed = CHECKSUM_PARTIAL; | |
193 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
194 | skb->csum_offset = offsetof(struct tcphdr, check); | |
195 | ||
196 | if (skb->sk->sk_family == AF_INET6) { | |
197 | ipv6h = ipv6_hdr(skb); | |
198 | th->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, | |
199 | datalen, IPPROTO_TCP, 0); | |
200 | } else { | |
201 | iph = ip_hdr(skb); | |
202 | th->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, datalen, | |
203 | IPPROTO_TCP, 0); | |
204 | } | |
205 | } | |
206 | ||
207 | static void complete_skb(struct sk_buff *nskb, struct sk_buff *skb, int headln) | |
208 | { | |
9188d5ca JK |
209 | struct sock *sk = skb->sk; |
210 | int delta; | |
211 | ||
e8f69799 IL |
212 | skb_copy_header(nskb, skb); |
213 | ||
214 | skb_put(nskb, skb->len); | |
215 | memcpy(nskb->data, skb->data, headln); | |
e8f69799 IL |
216 | |
217 | nskb->destructor = skb->destructor; | |
9188d5ca | 218 | nskb->sk = sk; |
e8f69799 IL |
219 | skb->destructor = NULL; |
220 | skb->sk = NULL; | |
9188d5ca | 221 | |
2dcb0033 JK |
222 | update_chksum(nskb, headln); |
223 | ||
5c4b4608 JK |
224 | /* sock_efree means skb must gone through skb_orphan_partial() */ |
225 | if (nskb->destructor == sock_efree) | |
226 | return; | |
227 | ||
9188d5ca JK |
228 | delta = nskb->truesize - skb->truesize; |
229 | if (likely(delta < 0)) | |
230 | WARN_ON_ONCE(refcount_sub_and_test(-delta, &sk->sk_wmem_alloc)); | |
231 | else if (delta) | |
232 | refcount_add(delta, &sk->sk_wmem_alloc); | |
e8f69799 IL |
233 | } |
234 | ||
235 | /* This function may be called after the user socket is already | |
236 | * closed so make sure we don't use anything freed during | |
237 | * tls_sk_proto_close here | |
238 | */ | |
239 | ||
240 | static int fill_sg_in(struct scatterlist *sg_in, | |
241 | struct sk_buff *skb, | |
d80a1b9d | 242 | struct tls_offload_context_tx *ctx, |
e8f69799 IL |
243 | u64 *rcd_sn, |
244 | s32 *sync_size, | |
245 | int *resync_sgs) | |
246 | { | |
504148fe | 247 | int tcp_payload_offset = skb_tcp_all_headers(skb); |
e8f69799 IL |
248 | int payload_len = skb->len - tcp_payload_offset; |
249 | u32 tcp_seq = ntohl(tcp_hdr(skb)->seq); | |
250 | struct tls_record_info *record; | |
251 | unsigned long flags; | |
252 | int remaining; | |
253 | int i; | |
254 | ||
255 | spin_lock_irqsave(&ctx->lock, flags); | |
256 | record = tls_get_record(ctx, tcp_seq, rcd_sn); | |
257 | if (!record) { | |
258 | spin_unlock_irqrestore(&ctx->lock, flags); | |
e8f69799 IL |
259 | return -EINVAL; |
260 | } | |
261 | ||
262 | *sync_size = tcp_seq - tls_record_start_seq(record); | |
263 | if (*sync_size < 0) { | |
264 | int is_start_marker = tls_record_is_start_marker(record); | |
265 | ||
266 | spin_unlock_irqrestore(&ctx->lock, flags); | |
267 | /* This should only occur if the relevant record was | |
268 | * already acked. In that case it should be ok | |
269 | * to drop the packet and avoid retransmission. | |
270 | * | |
271 | * There is a corner case where the packet contains | |
272 | * both an acked and a non-acked record. | |
273 | * We currently don't handle that case and rely | |
274 | * on TCP to retranmit a packet that doesn't contain | |
275 | * already acked payload. | |
276 | */ | |
277 | if (!is_start_marker) | |
278 | *sync_size = 0; | |
279 | return -EINVAL; | |
280 | } | |
281 | ||
282 | remaining = *sync_size; | |
283 | for (i = 0; remaining > 0; i++) { | |
284 | skb_frag_t *frag = &record->frags[i]; | |
285 | ||
286 | __skb_frag_ref(frag); | |
287 | sg_set_page(sg_in + i, skb_frag_page(frag), | |
b54c9d5b | 288 | skb_frag_size(frag), skb_frag_off(frag)); |
e8f69799 IL |
289 | |
290 | remaining -= skb_frag_size(frag); | |
291 | ||
292 | if (remaining < 0) | |
293 | sg_in[i].length += remaining; | |
294 | } | |
295 | *resync_sgs = i; | |
296 | ||
297 | spin_unlock_irqrestore(&ctx->lock, flags); | |
298 | if (skb_to_sgvec(skb, &sg_in[i], tcp_payload_offset, payload_len) < 0) | |
299 | return -EINVAL; | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | static void fill_sg_out(struct scatterlist sg_out[3], void *buf, | |
305 | struct tls_context *tls_ctx, | |
306 | struct sk_buff *nskb, | |
307 | int tcp_payload_offset, | |
308 | int payload_len, | |
309 | int sync_size, | |
310 | void *dummy_buf) | |
311 | { | |
ea7a9d88 GP |
312 | const struct tls_cipher_size_desc *cipher_sz = |
313 | &tls_cipher_size_desc[tls_ctx->crypto_send.info.cipher_type]; | |
314 | ||
e8f69799 IL |
315 | sg_set_buf(&sg_out[0], dummy_buf, sync_size); |
316 | sg_set_buf(&sg_out[1], nskb->data + tcp_payload_offset, payload_len); | |
317 | /* Add room for authentication tag produced by crypto */ | |
318 | dummy_buf += sync_size; | |
ea7a9d88 | 319 | sg_set_buf(&sg_out[2], dummy_buf, cipher_sz->tag); |
e8f69799 IL |
320 | } |
321 | ||
322 | static struct sk_buff *tls_enc_skb(struct tls_context *tls_ctx, | |
323 | struct scatterlist sg_out[3], | |
324 | struct scatterlist *sg_in, | |
325 | struct sk_buff *skb, | |
326 | s32 sync_size, u64 rcd_sn) | |
327 | { | |
d80a1b9d | 328 | struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
504148fe | 329 | int tcp_payload_offset = skb_tcp_all_headers(skb); |
e8f69799 | 330 | int payload_len = skb->len - tcp_payload_offset; |
ea7a9d88 GP |
331 | const struct tls_cipher_size_desc *cipher_sz; |
332 | void *buf, *iv, *aad, *dummy_buf, *salt; | |
e8f69799 IL |
333 | struct aead_request *aead_req; |
334 | struct sk_buff *nskb = NULL; | |
335 | int buf_len; | |
336 | ||
337 | aead_req = tls_alloc_aead_request(ctx->aead_send, GFP_ATOMIC); | |
338 | if (!aead_req) | |
339 | return NULL; | |
340 | ||
ea7a9d88 GP |
341 | switch (tls_ctx->crypto_send.info.cipher_type) { |
342 | case TLS_CIPHER_AES_GCM_128: | |
343 | salt = tls_ctx->crypto_send.aes_gcm_128.salt; | |
344 | break; | |
56e5a6d3 GP |
345 | case TLS_CIPHER_AES_GCM_256: |
346 | salt = tls_ctx->crypto_send.aes_gcm_256.salt; | |
347 | break; | |
ea7a9d88 | 348 | default: |
0834ced6 | 349 | goto free_req; |
ea7a9d88 GP |
350 | } |
351 | cipher_sz = &tls_cipher_size_desc[tls_ctx->crypto_send.info.cipher_type]; | |
352 | buf_len = cipher_sz->salt + cipher_sz->iv + TLS_AAD_SPACE_SIZE + | |
353 | sync_size + cipher_sz->tag; | |
e8f69799 IL |
354 | buf = kmalloc(buf_len, GFP_ATOMIC); |
355 | if (!buf) | |
356 | goto free_req; | |
357 | ||
358 | iv = buf; | |
ea7a9d88 GP |
359 | memcpy(iv, salt, cipher_sz->salt); |
360 | aad = buf + cipher_sz->salt + cipher_sz->iv; | |
e8f69799 IL |
361 | dummy_buf = aad + TLS_AAD_SPACE_SIZE; |
362 | ||
363 | nskb = alloc_skb(skb_headroom(skb) + skb->len, GFP_ATOMIC); | |
364 | if (!nskb) | |
365 | goto free_buf; | |
366 | ||
367 | skb_reserve(nskb, skb_headroom(skb)); | |
368 | ||
369 | fill_sg_out(sg_out, buf, tls_ctx, nskb, tcp_payload_offset, | |
370 | payload_len, sync_size, dummy_buf); | |
371 | ||
372 | if (tls_enc_records(aead_req, ctx->aead_send, sg_in, sg_out, aad, iv, | |
6942a284 VF |
373 | rcd_sn, sync_size + payload_len, |
374 | &tls_ctx->prot_info) < 0) | |
e8f69799 IL |
375 | goto free_nskb; |
376 | ||
377 | complete_skb(nskb, skb, tcp_payload_offset); | |
378 | ||
379 | /* validate_xmit_skb_list assumes that if the skb wasn't segmented | |
380 | * nskb->prev will point to the skb itself | |
381 | */ | |
382 | nskb->prev = nskb; | |
383 | ||
384 | free_buf: | |
385 | kfree(buf); | |
386 | free_req: | |
387 | kfree(aead_req); | |
388 | return nskb; | |
389 | free_nskb: | |
390 | kfree_skb(nskb); | |
391 | nskb = NULL; | |
392 | goto free_buf; | |
393 | } | |
394 | ||
395 | static struct sk_buff *tls_sw_fallback(struct sock *sk, struct sk_buff *skb) | |
396 | { | |
504148fe | 397 | int tcp_payload_offset = skb_tcp_all_headers(skb); |
e8f69799 | 398 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
d80a1b9d | 399 | struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx); |
e8f69799 IL |
400 | int payload_len = skb->len - tcp_payload_offset; |
401 | struct scatterlist *sg_in, sg_out[3]; | |
402 | struct sk_buff *nskb = NULL; | |
403 | int sg_in_max_elements; | |
404 | int resync_sgs = 0; | |
405 | s32 sync_size = 0; | |
406 | u64 rcd_sn; | |
407 | ||
408 | /* worst case is: | |
409 | * MAX_SKB_FRAGS in tls_record_info | |
410 | * MAX_SKB_FRAGS + 1 in SKB head and frags. | |
411 | */ | |
412 | sg_in_max_elements = 2 * MAX_SKB_FRAGS + 1; | |
413 | ||
414 | if (!payload_len) | |
415 | return skb; | |
416 | ||
417 | sg_in = kmalloc_array(sg_in_max_elements, sizeof(*sg_in), GFP_ATOMIC); | |
418 | if (!sg_in) | |
419 | goto free_orig; | |
420 | ||
421 | sg_init_table(sg_in, sg_in_max_elements); | |
422 | sg_init_table(sg_out, ARRAY_SIZE(sg_out)); | |
423 | ||
424 | if (fill_sg_in(sg_in, skb, ctx, &rcd_sn, &sync_size, &resync_sgs)) { | |
425 | /* bypass packets before kernel TLS socket option was set */ | |
426 | if (sync_size < 0 && payload_len <= -sync_size) | |
427 | nskb = skb_get(skb); | |
428 | goto put_sg; | |
429 | } | |
430 | ||
431 | nskb = tls_enc_skb(tls_ctx, sg_out, sg_in, skb, sync_size, rcd_sn); | |
432 | ||
433 | put_sg: | |
434 | while (resync_sgs) | |
435 | put_page(sg_page(&sg_in[--resync_sgs])); | |
436 | kfree(sg_in); | |
437 | free_orig: | |
87b11e06 JK |
438 | if (nskb) |
439 | consume_skb(skb); | |
440 | else | |
441 | kfree_skb(skb); | |
e8f69799 IL |
442 | return nskb; |
443 | } | |
444 | ||
445 | struct sk_buff *tls_validate_xmit_skb(struct sock *sk, | |
446 | struct net_device *dev, | |
447 | struct sk_buff *skb) | |
448 | { | |
94ce3b64 MM |
449 | if (dev == rcu_dereference_bh(tls_get_ctx(sk)->netdev) || |
450 | netif_is_bond_master(dev)) | |
e8f69799 IL |
451 | return skb; |
452 | ||
453 | return tls_sw_fallback(sk, skb); | |
454 | } | |
4799ac81 | 455 | EXPORT_SYMBOL_GPL(tls_validate_xmit_skb); |
e8f69799 | 456 | |
c55dcdd4 MM |
457 | struct sk_buff *tls_validate_xmit_skb_sw(struct sock *sk, |
458 | struct net_device *dev, | |
459 | struct sk_buff *skb) | |
460 | { | |
461 | return tls_sw_fallback(sk, skb); | |
462 | } | |
463 | ||
b9727d7f DM |
464 | struct sk_buff *tls_encrypt_skb(struct sk_buff *skb) |
465 | { | |
466 | return tls_sw_fallback(skb->sk, skb); | |
467 | } | |
468 | EXPORT_SYMBOL_GPL(tls_encrypt_skb); | |
469 | ||
e8f69799 | 470 | int tls_sw_fallback_init(struct sock *sk, |
d80a1b9d | 471 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
472 | struct tls_crypto_info *crypto_info) |
473 | { | |
ea7a9d88 | 474 | const struct tls_cipher_size_desc *cipher_sz; |
e8f69799 IL |
475 | const u8 *key; |
476 | int rc; | |
477 | ||
478 | offload_ctx->aead_send = | |
479 | crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC); | |
480 | if (IS_ERR(offload_ctx->aead_send)) { | |
481 | rc = PTR_ERR(offload_ctx->aead_send); | |
482 | pr_err_ratelimited("crypto_alloc_aead failed rc=%d\n", rc); | |
483 | offload_ctx->aead_send = NULL; | |
484 | goto err_out; | |
485 | } | |
486 | ||
ea7a9d88 GP |
487 | switch (crypto_info->cipher_type) { |
488 | case TLS_CIPHER_AES_GCM_128: | |
489 | key = ((struct tls12_crypto_info_aes_gcm_128 *)crypto_info)->key; | |
490 | break; | |
56e5a6d3 GP |
491 | case TLS_CIPHER_AES_GCM_256: |
492 | key = ((struct tls12_crypto_info_aes_gcm_256 *)crypto_info)->key; | |
493 | break; | |
ea7a9d88 | 494 | default: |
0834ced6 YL |
495 | rc = -EINVAL; |
496 | goto free_aead; | |
ea7a9d88 GP |
497 | } |
498 | cipher_sz = &tls_cipher_size_desc[crypto_info->cipher_type]; | |
e8f69799 | 499 | |
ea7a9d88 | 500 | rc = crypto_aead_setkey(offload_ctx->aead_send, key, cipher_sz->key); |
e8f69799 IL |
501 | if (rc) |
502 | goto free_aead; | |
503 | ||
ea7a9d88 | 504 | rc = crypto_aead_setauthsize(offload_ctx->aead_send, cipher_sz->tag); |
e8f69799 IL |
505 | if (rc) |
506 | goto free_aead; | |
507 | ||
508 | return 0; | |
509 | free_aead: | |
510 | crypto_free_aead(offload_ctx->aead_send); | |
511 | err_out: | |
512 | return rc; | |
513 | } |