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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 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | #ifndef _TLS_OFFLOAD_H | |
35 | #define _TLS_OFFLOAD_H | |
36 | ||
37 | #include <linux/types.h> | |
b9f3eb49 | 38 | #include <asm/byteorder.h> |
a54667f6 | 39 | #include <linux/crypto.h> |
b9f3eb49 DL |
40 | #include <linux/socket.h> |
41 | #include <linux/tcp.h> | |
d829e9c4 DB |
42 | #include <linux/skmsg.h> |
43 | ||
b9f3eb49 | 44 | #include <net/tcp.h> |
c46234eb | 45 | #include <net/strparser.h> |
a42055e8 | 46 | #include <crypto/aead.h> |
3c4d7559 DW |
47 | #include <uapi/linux/tls.h> |
48 | ||
49 | ||
50 | /* Maximum data size carried in a TLS record */ | |
51 | #define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14) | |
52 | ||
53 | #define TLS_HEADER_SIZE 5 | |
54 | #define TLS_NONCE_OFFSET TLS_HEADER_SIZE | |
55 | ||
56 | #define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type) | |
57 | ||
58 | #define TLS_RECORD_TYPE_DATA 0x17 | |
59 | ||
60 | #define TLS_AAD_SPACE_SIZE 13 | |
dd0bed16 AG |
61 | #define TLS_DEVICE_NAME_MAX 32 |
62 | ||
f295b3ae VG |
63 | #define MAX_IV_SIZE 16 |
64 | ||
65 | /* For AES-CCM, the full 16-bytes of IV is made of '4' fields of given sizes. | |
66 | * | |
67 | * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3] | |
68 | * | |
69 | * The field 'length' is encoded in field 'b0' as '(length width - 1)'. | |
70 | * Hence b0 contains (3 - 1) = 2. | |
71 | */ | |
72 | #define TLS_AES_CCM_IV_B0_BYTE 2 | |
73 | ||
dd0bed16 AG |
74 | /* |
75 | * This structure defines the routines for Inline TLS driver. | |
76 | * The following routines are optional and filled with a | |
77 | * null pointer if not defined. | |
78 | * | |
79 | * @name: Its the name of registered Inline tls device | |
80 | * @dev_list: Inline tls device list | |
81 | * int (*feature)(struct tls_device *device); | |
82 | * Called to return Inline TLS driver capability | |
83 | * | |
84 | * int (*hash)(struct tls_device *device, struct sock *sk); | |
85 | * This function sets Inline driver for listen and program | |
86 | * device specific functioanlity as required | |
87 | * | |
88 | * void (*unhash)(struct tls_device *device, struct sock *sk); | |
89 | * This function cleans listen state set by Inline TLS driver | |
df9d4a17 AG |
90 | * |
91 | * void (*release)(struct kref *kref); | |
92 | * Release the registered device and allocated resources | |
93 | * @kref: Number of reference to tls_device | |
dd0bed16 AG |
94 | */ |
95 | struct tls_device { | |
96 | char name[TLS_DEVICE_NAME_MAX]; | |
97 | struct list_head dev_list; | |
98 | int (*feature)(struct tls_device *device); | |
99 | int (*hash)(struct tls_device *device, struct sock *sk); | |
100 | void (*unhash)(struct tls_device *device, struct sock *sk); | |
df9d4a17 AG |
101 | void (*release)(struct kref *kref); |
102 | struct kref kref; | |
dd0bed16 | 103 | }; |
3c4d7559 | 104 | |
4799ac81 BP |
105 | enum { |
106 | TLS_BASE, | |
107 | TLS_SW, | |
108 | #ifdef CONFIG_TLS_DEVICE | |
109 | TLS_HW, | |
110 | #endif | |
111 | TLS_HW_RECORD, | |
112 | TLS_NUM_CONFIG, | |
113 | }; | |
114 | ||
a42055e8 VG |
115 | /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages |
116 | * allocated or mapped for each TLS record. After encryption, the records are | |
117 | * stores in a linked list. | |
118 | */ | |
119 | struct tls_rec { | |
120 | struct list_head list; | |
9932a29a | 121 | int tx_ready; |
a42055e8 | 122 | int tx_flags; |
4e6d4720 | 123 | int inplace_crypto; |
3c4d7559 | 124 | |
d829e9c4 DB |
125 | struct sk_msg msg_plaintext; |
126 | struct sk_msg msg_encrypted; | |
a42055e8 | 127 | |
d829e9c4 DB |
128 | /* AAD | msg_plaintext.sg.data | sg_tag */ |
129 | struct scatterlist sg_aead_in[2]; | |
130 | /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */ | |
131 | struct scatterlist sg_aead_out[2]; | |
a42055e8 | 132 | |
130b392c DW |
133 | char content_type; |
134 | struct scatterlist sg_content_type; | |
135 | ||
a42055e8 | 136 | char aad_space[TLS_AAD_SPACE_SIZE]; |
f295b3ae | 137 | u8 iv_data[MAX_IV_SIZE]; |
a42055e8 VG |
138 | struct aead_request aead_req; |
139 | u8 aead_req_ctx[]; | |
140 | }; | |
141 | ||
2b794c40 VG |
142 | struct tls_msg { |
143 | struct strp_msg rxm; | |
144 | u8 control; | |
145 | }; | |
146 | ||
a42055e8 VG |
147 | struct tx_work { |
148 | struct delayed_work work; | |
149 | struct sock *sk; | |
150 | }; | |
151 | ||
152 | struct tls_sw_context_tx { | |
153 | struct crypto_aead *aead_send; | |
154 | struct crypto_wait async_wait; | |
155 | struct tx_work tx_work; | |
156 | struct tls_rec *open_rec; | |
9932a29a | 157 | struct list_head tx_list; |
a42055e8 VG |
158 | atomic_t encrypt_pending; |
159 | int async_notify; | |
5b053e12 | 160 | int async_capable; |
a42055e8 VG |
161 | |
162 | #define BIT_TX_SCHEDULED 0 | |
163 | unsigned long tx_bitmask; | |
3c4d7559 DW |
164 | }; |
165 | ||
f66de3ee BP |
166 | struct tls_sw_context_rx { |
167 | struct crypto_aead *aead_recv; | |
168 | struct crypto_wait async_wait; | |
f66de3ee | 169 | struct strparser strp; |
692d7b5d | 170 | struct sk_buff_head rx_list; /* list of decrypted 'data' records */ |
f66de3ee | 171 | void (*saved_data_ready)(struct sock *sk); |
924ad65e | 172 | |
f66de3ee BP |
173 | struct sk_buff *recv_pkt; |
174 | u8 control; | |
692d7b5d | 175 | int async_capable; |
f66de3ee | 176 | bool decrypted; |
94524d8f VG |
177 | atomic_t decrypt_pending; |
178 | bool async_notify; | |
179 | }; | |
180 | ||
e8f69799 IL |
181 | struct tls_record_info { |
182 | struct list_head list; | |
183 | u32 end_seq; | |
184 | int len; | |
185 | int num_frags; | |
186 | skb_frag_t frags[MAX_SKB_FRAGS]; | |
187 | }; | |
188 | ||
d80a1b9d | 189 | struct tls_offload_context_tx { |
e8f69799 IL |
190 | struct crypto_aead *aead_send; |
191 | spinlock_t lock; /* protects records list */ | |
192 | struct list_head records_list; | |
193 | struct tls_record_info *open_record; | |
194 | struct tls_record_info *retransmit_hint; | |
195 | u64 hint_record_sn; | |
196 | u64 unacked_record_sn; | |
197 | ||
198 | struct scatterlist sg_tx_data[MAX_SKB_FRAGS]; | |
199 | void (*sk_destruct)(struct sock *sk); | |
200 | u8 driver_state[]; | |
201 | /* The TLS layer reserves room for driver specific state | |
202 | * Currently the belief is that there is not enough | |
203 | * driver specific state to justify another layer of indirection | |
204 | */ | |
205 | #define TLS_DRIVER_STATE_SIZE (max_t(size_t, 8, sizeof(void *))) | |
206 | }; | |
207 | ||
d80a1b9d BP |
208 | #define TLS_OFFLOAD_CONTEXT_SIZE_TX \ |
209 | (ALIGN(sizeof(struct tls_offload_context_tx), sizeof(void *)) + \ | |
e8f69799 IL |
210 | TLS_DRIVER_STATE_SIZE) |
211 | ||
e52972c1 JK |
212 | enum tls_context_flags { |
213 | TLS_RX_SYNC_RUNNING = 0, | |
214 | }; | |
215 | ||
dbe42559 | 216 | struct cipher_context { |
dbe42559 | 217 | char *iv; |
dbe42559 DW |
218 | char *rec_seq; |
219 | }; | |
220 | ||
86029d10 SD |
221 | union tls_crypto_context { |
222 | struct tls_crypto_info info; | |
fb99bce7 DW |
223 | union { |
224 | struct tls12_crypto_info_aes_gcm_128 aes_gcm_128; | |
225 | struct tls12_crypto_info_aes_gcm_256 aes_gcm_256; | |
226 | }; | |
86029d10 SD |
227 | }; |
228 | ||
4509de14 VG |
229 | struct tls_prot_info { |
230 | u16 version; | |
231 | u16 cipher_type; | |
232 | u16 prepend_size; | |
233 | u16 tag_size; | |
234 | u16 overhead_size; | |
235 | u16 iv_size; | |
f295b3ae | 236 | u16 salt_size; |
4509de14 VG |
237 | u16 rec_seq_size; |
238 | u16 aad_size; | |
239 | u16 tail_size; | |
240 | }; | |
241 | ||
3c4d7559 | 242 | struct tls_context { |
4509de14 VG |
243 | struct tls_prot_info prot_info; |
244 | ||
86029d10 SD |
245 | union tls_crypto_context crypto_send; |
246 | union tls_crypto_context crypto_recv; | |
3c4d7559 | 247 | |
f66de3ee BP |
248 | struct list_head list; |
249 | struct net_device *netdev; | |
250 | refcount_t refcount; | |
251 | ||
252 | void *priv_ctx_tx; | |
253 | void *priv_ctx_rx; | |
3c4d7559 | 254 | |
f66de3ee BP |
255 | u8 tx_conf:3; |
256 | u8 rx_conf:3; | |
6d88207f | 257 | |
dbe42559 | 258 | struct cipher_context tx; |
c46234eb | 259 | struct cipher_context rx; |
3c4d7559 DW |
260 | |
261 | struct scatterlist *partially_sent_record; | |
262 | u16 partially_sent_offset; | |
a42055e8 | 263 | |
3c4d7559 | 264 | unsigned long flags; |
c212d2c7 | 265 | bool in_tcp_sendpages; |
d829e9c4 | 266 | bool pending_open_record_frags; |
3c4d7559 | 267 | |
3c4d7559 | 268 | int (*push_pending_record)(struct sock *sk, int flags); |
3c4d7559 DW |
269 | |
270 | void (*sk_write_space)(struct sock *sk); | |
4799ac81 | 271 | void (*sk_destruct)(struct sock *sk); |
3c4d7559 DW |
272 | void (*sk_proto_close)(struct sock *sk, long timeout); |
273 | ||
274 | int (*setsockopt)(struct sock *sk, int level, | |
275 | int optname, char __user *optval, | |
276 | unsigned int optlen); | |
277 | int (*getsockopt)(struct sock *sk, int level, | |
278 | int optname, char __user *optval, | |
279 | int __user *optlen); | |
dd0bed16 AG |
280 | int (*hash)(struct sock *sk); |
281 | void (*unhash)(struct sock *sk); | |
3c4d7559 DW |
282 | }; |
283 | ||
da68b4ad JK |
284 | enum tls_offload_ctx_dir { |
285 | TLS_OFFLOAD_CTX_DIR_RX, | |
286 | TLS_OFFLOAD_CTX_DIR_TX, | |
287 | }; | |
288 | ||
289 | struct tlsdev_ops { | |
290 | int (*tls_dev_add)(struct net_device *netdev, struct sock *sk, | |
291 | enum tls_offload_ctx_dir direction, | |
292 | struct tls_crypto_info *crypto_info, | |
293 | u32 start_offload_tcp_sn); | |
294 | void (*tls_dev_del)(struct net_device *netdev, | |
295 | struct tls_context *ctx, | |
296 | enum tls_offload_ctx_dir direction); | |
297 | void (*tls_dev_resync_rx)(struct net_device *netdev, | |
298 | struct sock *sk, u32 seq, u64 rcd_sn); | |
299 | }; | |
300 | ||
4799ac81 BP |
301 | struct tls_offload_context_rx { |
302 | /* sw must be the first member of tls_offload_context_rx */ | |
303 | struct tls_sw_context_rx sw; | |
304 | atomic64_t resync_req; | |
305 | u8 driver_state[]; | |
306 | /* The TLS layer reserves room for driver specific state | |
307 | * Currently the belief is that there is not enough | |
308 | * driver specific state to justify another layer of indirection | |
309 | */ | |
310 | }; | |
311 | ||
312 | #define TLS_OFFLOAD_CONTEXT_SIZE_RX \ | |
313 | (ALIGN(sizeof(struct tls_offload_context_rx), sizeof(void *)) + \ | |
314 | TLS_DRIVER_STATE_SIZE) | |
315 | ||
3c4d7559 DW |
316 | int wait_on_pending_writer(struct sock *sk, long *timeo); |
317 | int tls_sk_query(struct sock *sk, int optname, char __user *optval, | |
318 | int __user *optlen); | |
319 | int tls_sk_attach(struct sock *sk, int optname, char __user *optval, | |
320 | unsigned int optlen); | |
321 | ||
c46234eb | 322 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx); |
3c4d7559 DW |
323 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); |
324 | int tls_sw_sendpage(struct sock *sk, struct page *page, | |
325 | int offset, size_t size, int flags); | |
326 | void tls_sw_close(struct sock *sk, long timeout); | |
f66de3ee BP |
327 | void tls_sw_free_resources_tx(struct sock *sk); |
328 | void tls_sw_free_resources_rx(struct sock *sk); | |
39f56e1a | 329 | void tls_sw_release_resources_rx(struct sock *sk); |
c46234eb DW |
330 | int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
331 | int nonblock, int flags, int *addr_len); | |
924ad65e | 332 | bool tls_sw_stream_read(const struct sock *sk); |
c46234eb DW |
333 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, |
334 | struct pipe_inode_info *pipe, | |
335 | size_t len, unsigned int flags); | |
3c4d7559 | 336 | |
e8f69799 IL |
337 | int tls_set_device_offload(struct sock *sk, struct tls_context *ctx); |
338 | int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); | |
339 | int tls_device_sendpage(struct sock *sk, struct page *page, | |
340 | int offset, size_t size, int flags); | |
35b71a34 | 341 | void tls_device_free_resources_tx(struct sock *sk); |
e8f69799 IL |
342 | void tls_device_init(void); |
343 | void tls_device_cleanup(void); | |
a42055e8 | 344 | int tls_tx_records(struct sock *sk, int flags); |
e8f69799 | 345 | |
d80a1b9d | 346 | struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, |
e8f69799 IL |
347 | u32 seq, u64 *p_record_sn); |
348 | ||
349 | static inline bool tls_record_is_start_marker(struct tls_record_info *rec) | |
350 | { | |
351 | return rec->len == 0; | |
352 | } | |
353 | ||
354 | static inline u32 tls_record_start_seq(struct tls_record_info *rec) | |
355 | { | |
356 | return rec->end_seq - rec->len; | |
357 | } | |
3c4d7559 DW |
358 | |
359 | int tls_push_sg(struct sock *sk, struct tls_context *ctx, | |
360 | struct scatterlist *sg, u16 first_offset, | |
361 | int flags); | |
a42055e8 VG |
362 | int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
363 | int flags); | |
35b71a34 | 364 | bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx); |
a42055e8 | 365 | |
2b794c40 VG |
366 | static inline struct tls_msg *tls_msg(struct sk_buff *skb) |
367 | { | |
368 | return (struct tls_msg *)strp_msg(skb); | |
369 | } | |
370 | ||
94850257 | 371 | static inline bool tls_is_partially_sent_record(struct tls_context *ctx) |
3c4d7559 | 372 | { |
94850257 | 373 | return !!ctx->partially_sent_record; |
3c4d7559 DW |
374 | } |
375 | ||
376 | static inline int tls_complete_pending_work(struct sock *sk, | |
377 | struct tls_context *ctx, | |
378 | int flags, long *timeo) | |
379 | { | |
380 | int rc = 0; | |
381 | ||
382 | if (unlikely(sk->sk_write_pending)) | |
383 | rc = wait_on_pending_writer(sk, timeo); | |
384 | ||
94850257 BP |
385 | if (!rc && tls_is_partially_sent_record(ctx)) |
386 | rc = tls_push_partial_record(sk, ctx, flags); | |
3c4d7559 DW |
387 | |
388 | return rc; | |
389 | } | |
390 | ||
3c4d7559 DW |
391 | static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) |
392 | { | |
393 | return tls_ctx->pending_open_record_frags; | |
394 | } | |
395 | ||
9932a29a | 396 | static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) |
a42055e8 VG |
397 | { |
398 | struct tls_rec *rec; | |
a42055e8 | 399 | |
9932a29a | 400 | rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); |
a42055e8 VG |
401 | if (!rec) |
402 | return false; | |
403 | ||
9932a29a | 404 | return READ_ONCE(rec->tx_ready); |
a42055e8 VG |
405 | } |
406 | ||
4799ac81 BP |
407 | struct sk_buff * |
408 | tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, | |
409 | struct sk_buff *skb); | |
410 | ||
e8f69799 IL |
411 | static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk) |
412 | { | |
4799ac81 | 413 | #ifdef CONFIG_SOCK_VALIDATE_XMIT |
b4f47f38 | 414 | return sk_fullsock(sk) && |
4799ac81 BP |
415 | (smp_load_acquire(&sk->sk_validate_xmit_skb) == |
416 | &tls_validate_xmit_skb); | |
417 | #else | |
418 | return false; | |
419 | #endif | |
e8f69799 IL |
420 | } |
421 | ||
f4a8e43f | 422 | static inline void tls_err_abort(struct sock *sk, int err) |
3c4d7559 | 423 | { |
f4a8e43f | 424 | sk->sk_err = err; |
3c4d7559 DW |
425 | sk->sk_error_report(sk); |
426 | } | |
427 | ||
428 | static inline bool tls_bigint_increment(unsigned char *seq, int len) | |
429 | { | |
430 | int i; | |
431 | ||
432 | for (i = len - 1; i >= 0; i--) { | |
433 | ++seq[i]; | |
434 | if (seq[i] != 0) | |
435 | break; | |
436 | } | |
437 | ||
438 | return (i == -1); | |
439 | } | |
440 | ||
4509de14 VG |
441 | static inline struct tls_context *tls_get_ctx(const struct sock *sk) |
442 | { | |
443 | struct inet_connection_sock *icsk = inet_csk(sk); | |
444 | ||
445 | return icsk->icsk_ulp_data; | |
446 | } | |
447 | ||
3c4d7559 | 448 | static inline void tls_advance_record_sn(struct sock *sk, |
130b392c DW |
449 | struct cipher_context *ctx, |
450 | int version) | |
3c4d7559 | 451 | { |
4509de14 VG |
452 | struct tls_context *tls_ctx = tls_get_ctx(sk); |
453 | struct tls_prot_info *prot = &tls_ctx->prot_info; | |
454 | ||
455 | if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) | |
f4a8e43f | 456 | tls_err_abort(sk, EBADMSG); |
130b392c DW |
457 | |
458 | if (version != TLS_1_3_VERSION) { | |
459 | tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, | |
4509de14 | 460 | prot->iv_size); |
130b392c | 461 | } |
3c4d7559 DW |
462 | } |
463 | ||
464 | static inline void tls_fill_prepend(struct tls_context *ctx, | |
465 | char *buf, | |
466 | size_t plaintext_len, | |
130b392c DW |
467 | unsigned char record_type, |
468 | int version) | |
3c4d7559 | 469 | { |
4509de14 VG |
470 | struct tls_prot_info *prot = &ctx->prot_info; |
471 | size_t pkt_len, iv_size = prot->iv_size; | |
3c4d7559 | 472 | |
4509de14 | 473 | pkt_len = plaintext_len + prot->tag_size; |
130b392c DW |
474 | if (version != TLS_1_3_VERSION) { |
475 | pkt_len += iv_size; | |
476 | ||
477 | memcpy(buf + TLS_NONCE_OFFSET, | |
478 | ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size); | |
479 | } | |
3c4d7559 DW |
480 | |
481 | /* we cover nonce explicit here as well, so buf should be of | |
482 | * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE | |
483 | */ | |
130b392c DW |
484 | buf[0] = version == TLS_1_3_VERSION ? |
485 | TLS_RECORD_TYPE_DATA : record_type; | |
486 | /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ | |
487 | buf[1] = TLS_1_2_VERSION_MINOR; | |
488 | buf[2] = TLS_1_2_VERSION_MAJOR; | |
3c4d7559 DW |
489 | /* we can use IV for nonce explicit according to spec */ |
490 | buf[3] = pkt_len >> 8; | |
491 | buf[4] = pkt_len & 0xFF; | |
3c4d7559 DW |
492 | } |
493 | ||
213ef6e7 IL |
494 | static inline void tls_make_aad(char *buf, |
495 | size_t size, | |
496 | char *record_sequence, | |
497 | int record_sequence_size, | |
130b392c DW |
498 | unsigned char record_type, |
499 | int version) | |
500 | { | |
501 | if (version != TLS_1_3_VERSION) { | |
502 | memcpy(buf, record_sequence, record_sequence_size); | |
503 | buf += 8; | |
504 | } else { | |
505 | size += TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
506 | } | |
507 | ||
508 | buf[0] = version == TLS_1_3_VERSION ? | |
509 | TLS_RECORD_TYPE_DATA : record_type; | |
510 | buf[1] = TLS_1_2_VERSION_MAJOR; | |
511 | buf[2] = TLS_1_2_VERSION_MINOR; | |
512 | buf[3] = size >> 8; | |
513 | buf[4] = size & 0xFF; | |
514 | } | |
515 | ||
516 | static inline void xor_iv_with_seq(int version, char *iv, char *seq) | |
213ef6e7 | 517 | { |
130b392c | 518 | int i; |
213ef6e7 | 519 | |
130b392c DW |
520 | if (version == TLS_1_3_VERSION) { |
521 | for (i = 0; i < 8; i++) | |
522 | iv[i + 4] ^= seq[i]; | |
523 | } | |
213ef6e7 IL |
524 | } |
525 | ||
3c4d7559 | 526 | |
f66de3ee BP |
527 | static inline struct tls_sw_context_rx *tls_sw_ctx_rx( |
528 | const struct tls_context *tls_ctx) | |
529 | { | |
530 | return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx; | |
531 | } | |
532 | ||
533 | static inline struct tls_sw_context_tx *tls_sw_ctx_tx( | |
3c4d7559 DW |
534 | const struct tls_context *tls_ctx) |
535 | { | |
f66de3ee | 536 | return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
537 | } |
538 | ||
d80a1b9d BP |
539 | static inline struct tls_offload_context_tx * |
540 | tls_offload_ctx_tx(const struct tls_context *tls_ctx) | |
3c4d7559 | 541 | { |
d80a1b9d | 542 | return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
543 | } |
544 | ||
0608c69c JF |
545 | static inline bool tls_sw_has_ctx_tx(const struct sock *sk) |
546 | { | |
547 | struct tls_context *ctx = tls_get_ctx(sk); | |
548 | ||
549 | if (!ctx) | |
550 | return false; | |
551 | return !!tls_sw_ctx_tx(ctx); | |
552 | } | |
553 | ||
7463d3a2 BP |
554 | void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); |
555 | void tls_device_write_space(struct sock *sk, struct tls_context *ctx); | |
556 | ||
4799ac81 BP |
557 | static inline struct tls_offload_context_rx * |
558 | tls_offload_ctx_rx(const struct tls_context *tls_ctx) | |
559 | { | |
560 | return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx; | |
561 | } | |
562 | ||
563 | /* The TLS context is valid until sk_destruct is called */ | |
564 | static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq) | |
565 | { | |
566 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
567 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); | |
568 | ||
63a1c95f | 569 | atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | 1); |
4799ac81 BP |
570 | } |
571 | ||
572 | ||
3c4d7559 DW |
573 | int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, |
574 | unsigned char *record_type); | |
dd0bed16 AG |
575 | void tls_register_device(struct tls_device *device); |
576 | void tls_unregister_device(struct tls_device *device); | |
4799ac81 | 577 | int tls_device_decrypted(struct sock *sk, struct sk_buff *skb); |
dafb67f3 BP |
578 | int decrypt_skb(struct sock *sk, struct sk_buff *skb, |
579 | struct scatterlist *sgout); | |
3c4d7559 | 580 | |
e8f69799 IL |
581 | struct sk_buff *tls_validate_xmit_skb(struct sock *sk, |
582 | struct net_device *dev, | |
583 | struct sk_buff *skb); | |
584 | ||
585 | int tls_sw_fallback_init(struct sock *sk, | |
d80a1b9d | 586 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
587 | struct tls_crypto_info *crypto_info); |
588 | ||
4799ac81 BP |
589 | int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); |
590 | ||
591 | void tls_device_offload_cleanup_rx(struct sock *sk); | |
592 | void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn); | |
593 | ||
3c4d7559 | 594 | #endif /* _TLS_OFFLOAD_H */ |