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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 | 42 | #include <linux/skmsg.h> |
79ffe608 | 43 | #include <linux/mutex.h> |
2e361176 | 44 | #include <linux/netdevice.h> |
15a7dea7 | 45 | #include <linux/rcupdate.h> |
d829e9c4 | 46 | |
b9f3eb49 | 47 | #include <net/tcp.h> |
c46234eb | 48 | #include <net/strparser.h> |
a42055e8 | 49 | #include <crypto/aead.h> |
3c4d7559 DW |
50 | #include <uapi/linux/tls.h> |
51 | ||
52 | ||
53 | /* Maximum data size carried in a TLS record */ | |
54 | #define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14) | |
55 | ||
56 | #define TLS_HEADER_SIZE 5 | |
57 | #define TLS_NONCE_OFFSET TLS_HEADER_SIZE | |
58 | ||
59 | #define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type) | |
60 | ||
61 | #define TLS_RECORD_TYPE_DATA 0x17 | |
62 | ||
63 | #define TLS_AAD_SPACE_SIZE 13 | |
dd0bed16 AG |
64 | #define TLS_DEVICE_NAME_MAX 32 |
65 | ||
f295b3ae | 66 | #define MAX_IV_SIZE 16 |
89fec474 | 67 | #define TLS_MAX_REC_SEQ_SIZE 8 |
f295b3ae VG |
68 | |
69 | /* For AES-CCM, the full 16-bytes of IV is made of '4' fields of given sizes. | |
70 | * | |
71 | * IV[16] = b0[1] || implicit nonce[4] || explicit nonce[8] || length[3] | |
72 | * | |
73 | * The field 'length' is encoded in field 'b0' as '(length width - 1)'. | |
74 | * Hence b0 contains (3 - 1) = 2. | |
75 | */ | |
76 | #define TLS_AES_CCM_IV_B0_BYTE 2 | |
77 | ||
dd0bed16 AG |
78 | /* |
79 | * This structure defines the routines for Inline TLS driver. | |
80 | * The following routines are optional and filled with a | |
81 | * null pointer if not defined. | |
82 | * | |
83 | * @name: Its the name of registered Inline tls device | |
84 | * @dev_list: Inline tls device list | |
85 | * int (*feature)(struct tls_device *device); | |
86 | * Called to return Inline TLS driver capability | |
87 | * | |
88 | * int (*hash)(struct tls_device *device, struct sock *sk); | |
89 | * This function sets Inline driver for listen and program | |
90 | * device specific functioanlity as required | |
91 | * | |
92 | * void (*unhash)(struct tls_device *device, struct sock *sk); | |
93 | * This function cleans listen state set by Inline TLS driver | |
df9d4a17 AG |
94 | * |
95 | * void (*release)(struct kref *kref); | |
96 | * Release the registered device and allocated resources | |
97 | * @kref: Number of reference to tls_device | |
dd0bed16 AG |
98 | */ |
99 | struct tls_device { | |
100 | char name[TLS_DEVICE_NAME_MAX]; | |
101 | struct list_head dev_list; | |
102 | int (*feature)(struct tls_device *device); | |
103 | int (*hash)(struct tls_device *device, struct sock *sk); | |
104 | void (*unhash)(struct tls_device *device, struct sock *sk); | |
df9d4a17 AG |
105 | void (*release)(struct kref *kref); |
106 | struct kref kref; | |
dd0bed16 | 107 | }; |
3c4d7559 | 108 | |
4799ac81 BP |
109 | enum { |
110 | TLS_BASE, | |
111 | TLS_SW, | |
4799ac81 | 112 | TLS_HW, |
4799ac81 BP |
113 | TLS_HW_RECORD, |
114 | TLS_NUM_CONFIG, | |
115 | }; | |
116 | ||
a42055e8 VG |
117 | /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages |
118 | * allocated or mapped for each TLS record. After encryption, the records are | |
119 | * stores in a linked list. | |
120 | */ | |
121 | struct tls_rec { | |
122 | struct list_head list; | |
9932a29a | 123 | int tx_ready; |
a42055e8 | 124 | int tx_flags; |
4e6d4720 | 125 | int inplace_crypto; |
3c4d7559 | 126 | |
d829e9c4 DB |
127 | struct sk_msg msg_plaintext; |
128 | struct sk_msg msg_encrypted; | |
a42055e8 | 129 | |
d829e9c4 DB |
130 | /* AAD | msg_plaintext.sg.data | sg_tag */ |
131 | struct scatterlist sg_aead_in[2]; | |
132 | /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */ | |
133 | struct scatterlist sg_aead_out[2]; | |
a42055e8 | 134 | |
130b392c DW |
135 | char content_type; |
136 | struct scatterlist sg_content_type; | |
137 | ||
a42055e8 | 138 | char aad_space[TLS_AAD_SPACE_SIZE]; |
f295b3ae | 139 | u8 iv_data[MAX_IV_SIZE]; |
a42055e8 VG |
140 | struct aead_request aead_req; |
141 | u8 aead_req_ctx[]; | |
142 | }; | |
143 | ||
2b794c40 VG |
144 | struct tls_msg { |
145 | struct strp_msg rxm; | |
146 | u8 control; | |
147 | }; | |
148 | ||
a42055e8 VG |
149 | struct tx_work { |
150 | struct delayed_work work; | |
151 | struct sock *sk; | |
152 | }; | |
153 | ||
154 | struct tls_sw_context_tx { | |
155 | struct crypto_aead *aead_send; | |
156 | struct crypto_wait async_wait; | |
157 | struct tx_work tx_work; | |
158 | struct tls_rec *open_rec; | |
9932a29a | 159 | struct list_head tx_list; |
a42055e8 VG |
160 | atomic_t encrypt_pending; |
161 | int async_notify; | |
5b053e12 | 162 | int async_capable; |
a42055e8 VG |
163 | |
164 | #define BIT_TX_SCHEDULED 0 | |
f87e62d4 | 165 | #define BIT_TX_CLOSING 1 |
a42055e8 | 166 | unsigned long tx_bitmask; |
3c4d7559 DW |
167 | }; |
168 | ||
f66de3ee BP |
169 | struct tls_sw_context_rx { |
170 | struct crypto_aead *aead_recv; | |
171 | struct crypto_wait async_wait; | |
f66de3ee | 172 | struct strparser strp; |
692d7b5d | 173 | struct sk_buff_head rx_list; /* list of decrypted 'data' records */ |
f66de3ee | 174 | void (*saved_data_ready)(struct sock *sk); |
924ad65e | 175 | |
f66de3ee BP |
176 | struct sk_buff *recv_pkt; |
177 | u8 control; | |
692d7b5d | 178 | int async_capable; |
f66de3ee | 179 | bool decrypted; |
94524d8f VG |
180 | atomic_t decrypt_pending; |
181 | bool async_notify; | |
182 | }; | |
183 | ||
e8f69799 IL |
184 | struct tls_record_info { |
185 | struct list_head list; | |
186 | u32 end_seq; | |
187 | int len; | |
188 | int num_frags; | |
189 | skb_frag_t frags[MAX_SKB_FRAGS]; | |
190 | }; | |
191 | ||
d80a1b9d | 192 | struct tls_offload_context_tx { |
e8f69799 IL |
193 | struct crypto_aead *aead_send; |
194 | spinlock_t lock; /* protects records list */ | |
195 | struct list_head records_list; | |
196 | struct tls_record_info *open_record; | |
197 | struct tls_record_info *retransmit_hint; | |
198 | u64 hint_record_sn; | |
199 | u64 unacked_record_sn; | |
200 | ||
201 | struct scatterlist sg_tx_data[MAX_SKB_FRAGS]; | |
202 | void (*sk_destruct)(struct sock *sk); | |
2e361176 | 203 | u8 driver_state[] __aligned(8); |
e8f69799 IL |
204 | /* The TLS layer reserves room for driver specific state |
205 | * Currently the belief is that there is not enough | |
206 | * driver specific state to justify another layer of indirection | |
207 | */ | |
2d6b51c6 | 208 | #define TLS_DRIVER_STATE_SIZE_TX 16 |
e8f69799 IL |
209 | }; |
210 | ||
d80a1b9d | 211 | #define TLS_OFFLOAD_CONTEXT_SIZE_TX \ |
2e361176 | 212 | (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX) |
e8f69799 | 213 | |
e52972c1 JK |
214 | enum tls_context_flags { |
215 | TLS_RX_SYNC_RUNNING = 0, | |
50180074 JK |
216 | /* Unlike RX where resync is driven entirely by the core in TX only |
217 | * the driver knows when things went out of sync, so we need the flag | |
218 | * to be atomic. | |
219 | */ | |
220 | TLS_TX_SYNC_SCHED = 1, | |
e52972c1 JK |
221 | }; |
222 | ||
dbe42559 | 223 | struct cipher_context { |
dbe42559 | 224 | char *iv; |
dbe42559 DW |
225 | char *rec_seq; |
226 | }; | |
227 | ||
86029d10 SD |
228 | union tls_crypto_context { |
229 | struct tls_crypto_info info; | |
fb99bce7 DW |
230 | union { |
231 | struct tls12_crypto_info_aes_gcm_128 aes_gcm_128; | |
232 | struct tls12_crypto_info_aes_gcm_256 aes_gcm_256; | |
233 | }; | |
86029d10 SD |
234 | }; |
235 | ||
4509de14 VG |
236 | struct tls_prot_info { |
237 | u16 version; | |
238 | u16 cipher_type; | |
239 | u16 prepend_size; | |
240 | u16 tag_size; | |
241 | u16 overhead_size; | |
242 | u16 iv_size; | |
f295b3ae | 243 | u16 salt_size; |
4509de14 VG |
244 | u16 rec_seq_size; |
245 | u16 aad_size; | |
246 | u16 tail_size; | |
247 | }; | |
248 | ||
3c4d7559 | 249 | struct tls_context { |
f0aaa2c9 | 250 | /* read-only cache line */ |
4509de14 VG |
251 | struct tls_prot_info prot_info; |
252 | ||
f0aaa2c9 JK |
253 | u8 tx_conf:3; |
254 | u8 rx_conf:3; | |
3c4d7559 | 255 | |
f0aaa2c9 JK |
256 | int (*push_pending_record)(struct sock *sk, int flags); |
257 | void (*sk_write_space)(struct sock *sk); | |
f66de3ee BP |
258 | |
259 | void *priv_ctx_tx; | |
260 | void *priv_ctx_rx; | |
3c4d7559 | 261 | |
f0aaa2c9 | 262 | struct net_device *netdev; |
6d88207f | 263 | |
f0aaa2c9 | 264 | /* rw cache line */ |
dbe42559 | 265 | struct cipher_context tx; |
c46234eb | 266 | struct cipher_context rx; |
3c4d7559 DW |
267 | |
268 | struct scatterlist *partially_sent_record; | |
269 | u16 partially_sent_offset; | |
a42055e8 | 270 | |
c212d2c7 | 271 | bool in_tcp_sendpages; |
d829e9c4 | 272 | bool pending_open_record_frags; |
79ffe608 JK |
273 | |
274 | struct mutex tx_lock; /* protects partially_sent_* fields and | |
275 | * per-type TX fields | |
276 | */ | |
f0aaa2c9 | 277 | unsigned long flags; |
3c4d7559 | 278 | |
f0aaa2c9 | 279 | /* cache cold stuff */ |
32857cf5 JF |
280 | struct proto *sk_proto; |
281 | ||
4799ac81 | 282 | void (*sk_destruct)(struct sock *sk); |
f0aaa2c9 JK |
283 | |
284 | union tls_crypto_context crypto_send; | |
285 | union tls_crypto_context crypto_recv; | |
286 | ||
287 | struct list_head list; | |
288 | refcount_t refcount; | |
15a7dea7 | 289 | struct rcu_head rcu; |
3c4d7559 DW |
290 | }; |
291 | ||
da68b4ad JK |
292 | enum tls_offload_ctx_dir { |
293 | TLS_OFFLOAD_CTX_DIR_RX, | |
294 | TLS_OFFLOAD_CTX_DIR_TX, | |
295 | }; | |
296 | ||
297 | struct tlsdev_ops { | |
298 | int (*tls_dev_add)(struct net_device *netdev, struct sock *sk, | |
299 | enum tls_offload_ctx_dir direction, | |
300 | struct tls_crypto_info *crypto_info, | |
301 | u32 start_offload_tcp_sn); | |
302 | void (*tls_dev_del)(struct net_device *netdev, | |
303 | struct tls_context *ctx, | |
304 | enum tls_offload_ctx_dir direction); | |
b5d9a834 DM |
305 | int (*tls_dev_resync)(struct net_device *netdev, |
306 | struct sock *sk, u32 seq, u8 *rcd_sn, | |
307 | enum tls_offload_ctx_dir direction); | |
da68b4ad JK |
308 | }; |
309 | ||
f953d33b JK |
310 | enum tls_offload_sync_type { |
311 | TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0, | |
312 | TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1, | |
313 | }; | |
314 | ||
315 | #define TLS_DEVICE_RESYNC_NH_START_IVAL 2 | |
316 | #define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128 | |
317 | ||
4799ac81 BP |
318 | struct tls_offload_context_rx { |
319 | /* sw must be the first member of tls_offload_context_rx */ | |
320 | struct tls_sw_context_rx sw; | |
f953d33b JK |
321 | enum tls_offload_sync_type resync_type; |
322 | /* this member is set regardless of resync_type, to avoid branches */ | |
323 | u8 resync_nh_reset:1; | |
324 | /* CORE_NEXT_HINT-only member, but use the hole here */ | |
325 | u8 resync_nh_do_now:1; | |
326 | union { | |
327 | /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */ | |
328 | struct { | |
329 | atomic64_t resync_req; | |
330 | }; | |
331 | /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */ | |
332 | struct { | |
333 | u32 decrypted_failed; | |
334 | u32 decrypted_tgt; | |
335 | } resync_nh; | |
336 | }; | |
2e361176 | 337 | u8 driver_state[] __aligned(8); |
4799ac81 BP |
338 | /* The TLS layer reserves room for driver specific state |
339 | * Currently the belief is that there is not enough | |
340 | * driver specific state to justify another layer of indirection | |
341 | */ | |
2d6b51c6 | 342 | #define TLS_DRIVER_STATE_SIZE_RX 8 |
4799ac81 BP |
343 | }; |
344 | ||
345 | #define TLS_OFFLOAD_CONTEXT_SIZE_RX \ | |
2e361176 | 346 | (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX) |
4799ac81 | 347 | |
15a7dea7 | 348 | void tls_ctx_free(struct sock *sk, struct tls_context *ctx); |
3c4d7559 DW |
349 | int wait_on_pending_writer(struct sock *sk, long *timeo); |
350 | int tls_sk_query(struct sock *sk, int optname, char __user *optval, | |
351 | int __user *optlen); | |
352 | int tls_sk_attach(struct sock *sk, int optname, char __user *optval, | |
353 | unsigned int optlen); | |
354 | ||
c46234eb | 355 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx); |
318892ac | 356 | void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx); |
313ab004 | 357 | void tls_sw_strparser_done(struct tls_context *tls_ctx); |
3c4d7559 DW |
358 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); |
359 | int tls_sw_sendpage(struct sock *sk, struct page *page, | |
360 | int offset, size_t size, int flags); | |
f87e62d4 | 361 | void tls_sw_cancel_work_tx(struct tls_context *tls_ctx); |
313ab004 JF |
362 | void tls_sw_release_resources_tx(struct sock *sk); |
363 | void tls_sw_free_ctx_tx(struct tls_context *tls_ctx); | |
f66de3ee | 364 | void tls_sw_free_resources_rx(struct sock *sk); |
39f56e1a | 365 | void tls_sw_release_resources_rx(struct sock *sk); |
313ab004 | 366 | void tls_sw_free_ctx_rx(struct tls_context *tls_ctx); |
c46234eb DW |
367 | int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
368 | int nonblock, int flags, int *addr_len); | |
924ad65e | 369 | bool tls_sw_stream_read(const struct sock *sk); |
c46234eb DW |
370 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, |
371 | struct pipe_inode_info *pipe, | |
372 | size_t len, unsigned int flags); | |
3c4d7559 | 373 | |
e8f69799 IL |
374 | int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); |
375 | int tls_device_sendpage(struct sock *sk, struct page *page, | |
376 | int offset, size_t size, int flags); | |
a42055e8 | 377 | int tls_tx_records(struct sock *sk, int flags); |
e8f69799 | 378 | |
d80a1b9d | 379 | struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, |
e8f69799 IL |
380 | u32 seq, u64 *p_record_sn); |
381 | ||
382 | static inline bool tls_record_is_start_marker(struct tls_record_info *rec) | |
383 | { | |
384 | return rec->len == 0; | |
385 | } | |
386 | ||
387 | static inline u32 tls_record_start_seq(struct tls_record_info *rec) | |
388 | { | |
389 | return rec->end_seq - rec->len; | |
390 | } | |
3c4d7559 DW |
391 | |
392 | int tls_push_sg(struct sock *sk, struct tls_context *ctx, | |
393 | struct scatterlist *sg, u16 first_offset, | |
394 | int flags); | |
a42055e8 VG |
395 | int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
396 | int flags); | |
35b71a34 | 397 | bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx); |
a42055e8 | 398 | |
2b794c40 VG |
399 | static inline struct tls_msg *tls_msg(struct sk_buff *skb) |
400 | { | |
401 | return (struct tls_msg *)strp_msg(skb); | |
402 | } | |
403 | ||
94850257 | 404 | static inline bool tls_is_partially_sent_record(struct tls_context *ctx) |
3c4d7559 | 405 | { |
94850257 | 406 | return !!ctx->partially_sent_record; |
3c4d7559 DW |
407 | } |
408 | ||
3c4d7559 DW |
409 | static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) |
410 | { | |
411 | return tls_ctx->pending_open_record_frags; | |
412 | } | |
413 | ||
9932a29a | 414 | static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) |
a42055e8 VG |
415 | { |
416 | struct tls_rec *rec; | |
a42055e8 | 417 | |
9932a29a | 418 | rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); |
a42055e8 VG |
419 | if (!rec) |
420 | return false; | |
421 | ||
9932a29a | 422 | return READ_ONCE(rec->tx_ready); |
a42055e8 VG |
423 | } |
424 | ||
26811cc9 DC |
425 | static inline u16 tls_user_config(struct tls_context *ctx, bool tx) |
426 | { | |
427 | u16 config = tx ? ctx->tx_conf : ctx->rx_conf; | |
428 | ||
429 | switch (config) { | |
430 | case TLS_BASE: | |
431 | return TLS_CONF_BASE; | |
432 | case TLS_SW: | |
433 | return TLS_CONF_SW; | |
434 | case TLS_HW: | |
435 | return TLS_CONF_HW; | |
436 | case TLS_HW_RECORD: | |
437 | return TLS_CONF_HW_RECORD; | |
438 | } | |
439 | return 0; | |
440 | } | |
441 | ||
4799ac81 BP |
442 | struct sk_buff * |
443 | tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, | |
444 | struct sk_buff *skb); | |
445 | ||
e8f69799 IL |
446 | static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk) |
447 | { | |
4799ac81 | 448 | #ifdef CONFIG_SOCK_VALIDATE_XMIT |
b4f47f38 | 449 | return sk_fullsock(sk) && |
4799ac81 BP |
450 | (smp_load_acquire(&sk->sk_validate_xmit_skb) == |
451 | &tls_validate_xmit_skb); | |
452 | #else | |
453 | return false; | |
454 | #endif | |
e8f69799 IL |
455 | } |
456 | ||
f4a8e43f | 457 | static inline void tls_err_abort(struct sock *sk, int err) |
3c4d7559 | 458 | { |
f4a8e43f | 459 | sk->sk_err = err; |
3c4d7559 DW |
460 | sk->sk_error_report(sk); |
461 | } | |
462 | ||
463 | static inline bool tls_bigint_increment(unsigned char *seq, int len) | |
464 | { | |
465 | int i; | |
466 | ||
467 | for (i = len - 1; i >= 0; i--) { | |
468 | ++seq[i]; | |
469 | if (seq[i] != 0) | |
470 | break; | |
471 | } | |
472 | ||
473 | return (i == -1); | |
474 | } | |
475 | ||
4509de14 VG |
476 | static inline struct tls_context *tls_get_ctx(const struct sock *sk) |
477 | { | |
478 | struct inet_connection_sock *icsk = inet_csk(sk); | |
479 | ||
15a7dea7 JK |
480 | /* Use RCU on icsk_ulp_data only for sock diag code, |
481 | * TLS data path doesn't need rcu_dereference(). | |
482 | */ | |
483 | return (__force void *)icsk->icsk_ulp_data; | |
4509de14 VG |
484 | } |
485 | ||
3c4d7559 | 486 | static inline void tls_advance_record_sn(struct sock *sk, |
fb0f886f JK |
487 | struct tls_prot_info *prot, |
488 | struct cipher_context *ctx) | |
3c4d7559 | 489 | { |
4509de14 | 490 | if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) |
f4a8e43f | 491 | tls_err_abort(sk, EBADMSG); |
130b392c | 492 | |
fb0f886f | 493 | if (prot->version != TLS_1_3_VERSION) |
130b392c | 494 | tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, |
4509de14 | 495 | prot->iv_size); |
3c4d7559 DW |
496 | } |
497 | ||
498 | static inline void tls_fill_prepend(struct tls_context *ctx, | |
499 | char *buf, | |
500 | size_t plaintext_len, | |
130b392c DW |
501 | unsigned char record_type, |
502 | int version) | |
3c4d7559 | 503 | { |
4509de14 VG |
504 | struct tls_prot_info *prot = &ctx->prot_info; |
505 | size_t pkt_len, iv_size = prot->iv_size; | |
3c4d7559 | 506 | |
4509de14 | 507 | pkt_len = plaintext_len + prot->tag_size; |
130b392c DW |
508 | if (version != TLS_1_3_VERSION) { |
509 | pkt_len += iv_size; | |
510 | ||
511 | memcpy(buf + TLS_NONCE_OFFSET, | |
512 | ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size); | |
513 | } | |
3c4d7559 DW |
514 | |
515 | /* we cover nonce explicit here as well, so buf should be of | |
516 | * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE | |
517 | */ | |
130b392c DW |
518 | buf[0] = version == TLS_1_3_VERSION ? |
519 | TLS_RECORD_TYPE_DATA : record_type; | |
520 | /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ | |
521 | buf[1] = TLS_1_2_VERSION_MINOR; | |
522 | buf[2] = TLS_1_2_VERSION_MAJOR; | |
3c4d7559 DW |
523 | /* we can use IV for nonce explicit according to spec */ |
524 | buf[3] = pkt_len >> 8; | |
525 | buf[4] = pkt_len & 0xFF; | |
3c4d7559 DW |
526 | } |
527 | ||
213ef6e7 IL |
528 | static inline void tls_make_aad(char *buf, |
529 | size_t size, | |
530 | char *record_sequence, | |
531 | int record_sequence_size, | |
130b392c DW |
532 | unsigned char record_type, |
533 | int version) | |
534 | { | |
535 | if (version != TLS_1_3_VERSION) { | |
536 | memcpy(buf, record_sequence, record_sequence_size); | |
537 | buf += 8; | |
538 | } else { | |
539 | size += TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
540 | } | |
541 | ||
542 | buf[0] = version == TLS_1_3_VERSION ? | |
543 | TLS_RECORD_TYPE_DATA : record_type; | |
544 | buf[1] = TLS_1_2_VERSION_MAJOR; | |
545 | buf[2] = TLS_1_2_VERSION_MINOR; | |
546 | buf[3] = size >> 8; | |
547 | buf[4] = size & 0xFF; | |
548 | } | |
549 | ||
550 | static inline void xor_iv_with_seq(int version, char *iv, char *seq) | |
213ef6e7 | 551 | { |
130b392c | 552 | int i; |
213ef6e7 | 553 | |
130b392c DW |
554 | if (version == TLS_1_3_VERSION) { |
555 | for (i = 0; i < 8; i++) | |
556 | iv[i + 4] ^= seq[i]; | |
557 | } | |
213ef6e7 IL |
558 | } |
559 | ||
3c4d7559 | 560 | |
f66de3ee BP |
561 | static inline struct tls_sw_context_rx *tls_sw_ctx_rx( |
562 | const struct tls_context *tls_ctx) | |
563 | { | |
564 | return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx; | |
565 | } | |
566 | ||
567 | static inline struct tls_sw_context_tx *tls_sw_ctx_tx( | |
3c4d7559 DW |
568 | const struct tls_context *tls_ctx) |
569 | { | |
f66de3ee | 570 | return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
571 | } |
572 | ||
d80a1b9d BP |
573 | static inline struct tls_offload_context_tx * |
574 | tls_offload_ctx_tx(const struct tls_context *tls_ctx) | |
3c4d7559 | 575 | { |
d80a1b9d | 576 | return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
577 | } |
578 | ||
0608c69c JF |
579 | static inline bool tls_sw_has_ctx_tx(const struct sock *sk) |
580 | { | |
581 | struct tls_context *ctx = tls_get_ctx(sk); | |
582 | ||
583 | if (!ctx) | |
584 | return false; | |
585 | return !!tls_sw_ctx_tx(ctx); | |
586 | } | |
587 | ||
7463d3a2 BP |
588 | void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); |
589 | void tls_device_write_space(struct sock *sk, struct tls_context *ctx); | |
590 | ||
4799ac81 BP |
591 | static inline struct tls_offload_context_rx * |
592 | tls_offload_ctx_rx(const struct tls_context *tls_ctx) | |
593 | { | |
594 | return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx; | |
595 | } | |
596 | ||
2e361176 JK |
597 | #if IS_ENABLED(CONFIG_TLS_DEVICE) |
598 | static inline void *__tls_driver_ctx(struct tls_context *tls_ctx, | |
599 | enum tls_offload_ctx_dir direction) | |
600 | { | |
601 | if (direction == TLS_OFFLOAD_CTX_DIR_TX) | |
602 | return tls_offload_ctx_tx(tls_ctx)->driver_state; | |
603 | else | |
604 | return tls_offload_ctx_rx(tls_ctx)->driver_state; | |
605 | } | |
606 | ||
607 | static inline void * | |
608 | tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction) | |
609 | { | |
610 | return __tls_driver_ctx(tls_get_ctx(sk), direction); | |
611 | } | |
612 | #endif | |
613 | ||
4799ac81 BP |
614 | /* The TLS context is valid until sk_destruct is called */ |
615 | static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq) | |
616 | { | |
617 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
618 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); | |
619 | ||
63a1c95f | 620 | atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | 1); |
4799ac81 BP |
621 | } |
622 | ||
f953d33b JK |
623 | static inline void |
624 | tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type) | |
625 | { | |
626 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
627 | ||
628 | tls_offload_ctx_rx(tls_ctx)->resync_type = type; | |
629 | } | |
4799ac81 | 630 | |
50180074 JK |
631 | static inline void tls_offload_tx_resync_request(struct sock *sk) |
632 | { | |
633 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
634 | ||
635 | WARN_ON(test_and_set_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags)); | |
636 | } | |
637 | ||
638 | /* Driver's seq tracking has to be disabled until resync succeeded */ | |
639 | static inline bool tls_offload_tx_resync_pending(struct sock *sk) | |
640 | { | |
641 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
642 | bool ret; | |
643 | ||
644 | ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags); | |
645 | smp_mb__after_atomic(); | |
646 | return ret; | |
647 | } | |
648 | ||
3c4d7559 DW |
649 | int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, |
650 | unsigned char *record_type); | |
dd0bed16 AG |
651 | void tls_register_device(struct tls_device *device); |
652 | void tls_unregister_device(struct tls_device *device); | |
dafb67f3 BP |
653 | int decrypt_skb(struct sock *sk, struct sk_buff *skb, |
654 | struct scatterlist *sgout); | |
b9727d7f | 655 | struct sk_buff *tls_encrypt_skb(struct sk_buff *skb); |
3c4d7559 | 656 | |
e8f69799 IL |
657 | struct sk_buff *tls_validate_xmit_skb(struct sock *sk, |
658 | struct net_device *dev, | |
659 | struct sk_buff *skb); | |
660 | ||
661 | int tls_sw_fallback_init(struct sock *sk, | |
d80a1b9d | 662 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
663 | struct tls_crypto_info *crypto_info); |
664 | ||
be2fbc15 JK |
665 | #ifdef CONFIG_TLS_DEVICE |
666 | void tls_device_init(void); | |
667 | void tls_device_cleanup(void); | |
668 | int tls_set_device_offload(struct sock *sk, struct tls_context *ctx); | |
669 | void tls_device_free_resources_tx(struct sock *sk); | |
4799ac81 | 670 | int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); |
4799ac81 | 671 | void tls_device_offload_cleanup_rx(struct sock *sk); |
f953d33b | 672 | void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq); |
be2fbc15 JK |
673 | int tls_device_decrypted(struct sock *sk, struct sk_buff *skb); |
674 | #else | |
675 | static inline void tls_device_init(void) {} | |
676 | static inline void tls_device_cleanup(void) {} | |
4799ac81 | 677 | |
be2fbc15 JK |
678 | static inline int |
679 | tls_set_device_offload(struct sock *sk, struct tls_context *ctx) | |
680 | { | |
681 | return -EOPNOTSUPP; | |
682 | } | |
683 | ||
684 | static inline void tls_device_free_resources_tx(struct sock *sk) {} | |
685 | ||
686 | static inline int | |
687 | tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) | |
688 | { | |
689 | return -EOPNOTSUPP; | |
690 | } | |
691 | ||
692 | static inline void tls_device_offload_cleanup_rx(struct sock *sk) {} | |
693 | static inline void | |
694 | tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {} | |
695 | ||
696 | static inline int tls_device_decrypted(struct sock *sk, struct sk_buff *skb) | |
697 | { | |
698 | return 0; | |
699 | } | |
700 | #endif | |
3c4d7559 | 701 | #endif /* _TLS_OFFLOAD_H */ |