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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 | |
d26b698d | 47 | #include <net/net_namespace.h> |
b9f3eb49 | 48 | #include <net/tcp.h> |
c46234eb | 49 | #include <net/strparser.h> |
a42055e8 | 50 | #include <crypto/aead.h> |
3c4d7559 DW |
51 | #include <uapi/linux/tls.h> |
52 | ||
53 | ||
54 | /* Maximum data size carried in a TLS record */ | |
55 | #define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14) | |
56 | ||
57 | #define TLS_HEADER_SIZE 5 | |
58 | #define TLS_NONCE_OFFSET TLS_HEADER_SIZE | |
59 | ||
60 | #define TLS_CRYPTO_INFO_READY(info) ((info)->cipher_type) | |
61 | ||
62 | #define TLS_RECORD_TYPE_DATA 0x17 | |
63 | ||
64 | #define TLS_AAD_SPACE_SIZE 13 | |
dd0bed16 | 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 | ||
d26b698d JK |
78 | #define __TLS_INC_STATS(net, field) \ |
79 | __SNMP_INC_STATS((net)->mib.tls_statistics, field) | |
80 | #define TLS_INC_STATS(net, field) \ | |
81 | SNMP_INC_STATS((net)->mib.tls_statistics, field) | |
82 | #define __TLS_DEC_STATS(net, field) \ | |
83 | __SNMP_DEC_STATS((net)->mib.tls_statistics, field) | |
84 | #define TLS_DEC_STATS(net, field) \ | |
85 | SNMP_DEC_STATS((net)->mib.tls_statistics, field) | |
86 | ||
4799ac81 BP |
87 | enum { |
88 | TLS_BASE, | |
89 | TLS_SW, | |
4799ac81 | 90 | TLS_HW, |
4799ac81 BP |
91 | TLS_HW_RECORD, |
92 | TLS_NUM_CONFIG, | |
93 | }; | |
94 | ||
a42055e8 VG |
95 | /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages |
96 | * allocated or mapped for each TLS record. After encryption, the records are | |
97 | * stores in a linked list. | |
98 | */ | |
99 | struct tls_rec { | |
100 | struct list_head list; | |
9932a29a | 101 | int tx_ready; |
a42055e8 | 102 | int tx_flags; |
3c4d7559 | 103 | |
d829e9c4 DB |
104 | struct sk_msg msg_plaintext; |
105 | struct sk_msg msg_encrypted; | |
a42055e8 | 106 | |
d829e9c4 DB |
107 | /* AAD | msg_plaintext.sg.data | sg_tag */ |
108 | struct scatterlist sg_aead_in[2]; | |
109 | /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */ | |
110 | struct scatterlist sg_aead_out[2]; | |
a42055e8 | 111 | |
130b392c DW |
112 | char content_type; |
113 | struct scatterlist sg_content_type; | |
114 | ||
a42055e8 | 115 | char aad_space[TLS_AAD_SPACE_SIZE]; |
f295b3ae | 116 | u8 iv_data[MAX_IV_SIZE]; |
a42055e8 VG |
117 | struct aead_request aead_req; |
118 | u8 aead_req_ctx[]; | |
119 | }; | |
120 | ||
2b794c40 VG |
121 | struct tls_msg { |
122 | struct strp_msg rxm; | |
123 | u8 control; | |
124 | }; | |
125 | ||
a42055e8 VG |
126 | struct tx_work { |
127 | struct delayed_work work; | |
128 | struct sock *sk; | |
129 | }; | |
130 | ||
131 | struct tls_sw_context_tx { | |
132 | struct crypto_aead *aead_send; | |
133 | struct crypto_wait async_wait; | |
134 | struct tx_work tx_work; | |
135 | struct tls_rec *open_rec; | |
9932a29a | 136 | struct list_head tx_list; |
a42055e8 | 137 | atomic_t encrypt_pending; |
0cada332 VKY |
138 | /* protect crypto_wait with encrypt_pending */ |
139 | spinlock_t encrypt_compl_lock; | |
a42055e8 | 140 | int async_notify; |
5c5458ec | 141 | u8 async_capable:1; |
a42055e8 VG |
142 | |
143 | #define BIT_TX_SCHEDULED 0 | |
f87e62d4 | 144 | #define BIT_TX_CLOSING 1 |
a42055e8 | 145 | unsigned long tx_bitmask; |
3c4d7559 DW |
146 | }; |
147 | ||
f66de3ee BP |
148 | struct tls_sw_context_rx { |
149 | struct crypto_aead *aead_recv; | |
150 | struct crypto_wait async_wait; | |
f66de3ee | 151 | struct strparser strp; |
692d7b5d | 152 | struct sk_buff_head rx_list; /* list of decrypted 'data' records */ |
f66de3ee | 153 | void (*saved_data_ready)(struct sock *sk); |
924ad65e | 154 | |
f66de3ee BP |
155 | struct sk_buff *recv_pkt; |
156 | u8 control; | |
5c5458ec | 157 | u8 async_capable:1; |
bc76e5bb | 158 | u8 decrypted:1; |
94524d8f | 159 | atomic_t decrypt_pending; |
0cada332 VKY |
160 | /* protect crypto_wait with decrypt_pending*/ |
161 | spinlock_t decrypt_compl_lock; | |
94524d8f VG |
162 | bool async_notify; |
163 | }; | |
164 | ||
e8f69799 IL |
165 | struct tls_record_info { |
166 | struct list_head list; | |
167 | u32 end_seq; | |
168 | int len; | |
169 | int num_frags; | |
170 | skb_frag_t frags[MAX_SKB_FRAGS]; | |
171 | }; | |
172 | ||
d80a1b9d | 173 | struct tls_offload_context_tx { |
e8f69799 IL |
174 | struct crypto_aead *aead_send; |
175 | spinlock_t lock; /* protects records list */ | |
176 | struct list_head records_list; | |
177 | struct tls_record_info *open_record; | |
178 | struct tls_record_info *retransmit_hint; | |
179 | u64 hint_record_sn; | |
180 | u64 unacked_record_sn; | |
181 | ||
182 | struct scatterlist sg_tx_data[MAX_SKB_FRAGS]; | |
183 | void (*sk_destruct)(struct sock *sk); | |
2e361176 | 184 | u8 driver_state[] __aligned(8); |
e8f69799 IL |
185 | /* The TLS layer reserves room for driver specific state |
186 | * Currently the belief is that there is not enough | |
187 | * driver specific state to justify another layer of indirection | |
188 | */ | |
2d6b51c6 | 189 | #define TLS_DRIVER_STATE_SIZE_TX 16 |
e8f69799 IL |
190 | }; |
191 | ||
d80a1b9d | 192 | #define TLS_OFFLOAD_CONTEXT_SIZE_TX \ |
2e361176 | 193 | (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX) |
e8f69799 | 194 | |
e52972c1 JK |
195 | enum tls_context_flags { |
196 | TLS_RX_SYNC_RUNNING = 0, | |
50180074 JK |
197 | /* Unlike RX where resync is driven entirely by the core in TX only |
198 | * the driver knows when things went out of sync, so we need the flag | |
199 | * to be atomic. | |
200 | */ | |
201 | TLS_TX_SYNC_SCHED = 1, | |
e52972c1 JK |
202 | }; |
203 | ||
dbe42559 | 204 | struct cipher_context { |
dbe42559 | 205 | char *iv; |
dbe42559 DW |
206 | char *rec_seq; |
207 | }; | |
208 | ||
86029d10 SD |
209 | union tls_crypto_context { |
210 | struct tls_crypto_info info; | |
fb99bce7 DW |
211 | union { |
212 | struct tls12_crypto_info_aes_gcm_128 aes_gcm_128; | |
213 | struct tls12_crypto_info_aes_gcm_256 aes_gcm_256; | |
214 | }; | |
86029d10 SD |
215 | }; |
216 | ||
4509de14 VG |
217 | struct tls_prot_info { |
218 | u16 version; | |
219 | u16 cipher_type; | |
220 | u16 prepend_size; | |
221 | u16 tag_size; | |
222 | u16 overhead_size; | |
223 | u16 iv_size; | |
f295b3ae | 224 | u16 salt_size; |
4509de14 VG |
225 | u16 rec_seq_size; |
226 | u16 aad_size; | |
227 | u16 tail_size; | |
228 | }; | |
229 | ||
3c4d7559 | 230 | struct tls_context { |
f0aaa2c9 | 231 | /* read-only cache line */ |
4509de14 VG |
232 | struct tls_prot_info prot_info; |
233 | ||
f0aaa2c9 JK |
234 | u8 tx_conf:3; |
235 | u8 rx_conf:3; | |
3c4d7559 | 236 | |
f0aaa2c9 JK |
237 | int (*push_pending_record)(struct sock *sk, int flags); |
238 | void (*sk_write_space)(struct sock *sk); | |
f66de3ee BP |
239 | |
240 | void *priv_ctx_tx; | |
241 | void *priv_ctx_rx; | |
3c4d7559 | 242 | |
f0aaa2c9 | 243 | struct net_device *netdev; |
6d88207f | 244 | |
f0aaa2c9 | 245 | /* rw cache line */ |
dbe42559 | 246 | struct cipher_context tx; |
c46234eb | 247 | struct cipher_context rx; |
3c4d7559 DW |
248 | |
249 | struct scatterlist *partially_sent_record; | |
250 | u16 partially_sent_offset; | |
a42055e8 | 251 | |
c212d2c7 | 252 | bool in_tcp_sendpages; |
d829e9c4 | 253 | bool pending_open_record_frags; |
79ffe608 JK |
254 | |
255 | struct mutex tx_lock; /* protects partially_sent_* fields and | |
256 | * per-type TX fields | |
257 | */ | |
f0aaa2c9 | 258 | unsigned long flags; |
3c4d7559 | 259 | |
f0aaa2c9 | 260 | /* cache cold stuff */ |
32857cf5 JF |
261 | struct proto *sk_proto; |
262 | ||
4799ac81 | 263 | void (*sk_destruct)(struct sock *sk); |
f0aaa2c9 JK |
264 | |
265 | union tls_crypto_context crypto_send; | |
266 | union tls_crypto_context crypto_recv; | |
267 | ||
268 | struct list_head list; | |
269 | refcount_t refcount; | |
15a7dea7 | 270 | struct rcu_head rcu; |
3c4d7559 DW |
271 | }; |
272 | ||
da68b4ad JK |
273 | enum tls_offload_ctx_dir { |
274 | TLS_OFFLOAD_CTX_DIR_RX, | |
275 | TLS_OFFLOAD_CTX_DIR_TX, | |
276 | }; | |
277 | ||
278 | struct tlsdev_ops { | |
279 | int (*tls_dev_add)(struct net_device *netdev, struct sock *sk, | |
280 | enum tls_offload_ctx_dir direction, | |
281 | struct tls_crypto_info *crypto_info, | |
282 | u32 start_offload_tcp_sn); | |
283 | void (*tls_dev_del)(struct net_device *netdev, | |
284 | struct tls_context *ctx, | |
285 | enum tls_offload_ctx_dir direction); | |
b5d9a834 DM |
286 | int (*tls_dev_resync)(struct net_device *netdev, |
287 | struct sock *sk, u32 seq, u8 *rcd_sn, | |
288 | enum tls_offload_ctx_dir direction); | |
da68b4ad JK |
289 | }; |
290 | ||
f953d33b JK |
291 | enum tls_offload_sync_type { |
292 | TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ = 0, | |
293 | TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT = 1, | |
ed9b7646 | 294 | TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC = 2, |
f953d33b JK |
295 | }; |
296 | ||
297 | #define TLS_DEVICE_RESYNC_NH_START_IVAL 2 | |
298 | #define TLS_DEVICE_RESYNC_NH_MAX_IVAL 128 | |
299 | ||
ed9b7646 BP |
300 | #define TLS_DEVICE_RESYNC_ASYNC_LOGMAX 13 |
301 | struct tls_offload_resync_async { | |
302 | atomic64_t req; | |
303 | u32 loglen; | |
304 | u32 log[TLS_DEVICE_RESYNC_ASYNC_LOGMAX]; | |
305 | }; | |
306 | ||
4799ac81 BP |
307 | struct tls_offload_context_rx { |
308 | /* sw must be the first member of tls_offload_context_rx */ | |
309 | struct tls_sw_context_rx sw; | |
f953d33b JK |
310 | enum tls_offload_sync_type resync_type; |
311 | /* this member is set regardless of resync_type, to avoid branches */ | |
312 | u8 resync_nh_reset:1; | |
313 | /* CORE_NEXT_HINT-only member, but use the hole here */ | |
314 | u8 resync_nh_do_now:1; | |
315 | union { | |
316 | /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ */ | |
317 | struct { | |
318 | atomic64_t resync_req; | |
319 | }; | |
320 | /* TLS_OFFLOAD_SYNC_TYPE_CORE_NEXT_HINT */ | |
321 | struct { | |
322 | u32 decrypted_failed; | |
323 | u32 decrypted_tgt; | |
324 | } resync_nh; | |
ed9b7646 BP |
325 | /* TLS_OFFLOAD_SYNC_TYPE_DRIVER_REQ_ASYNC */ |
326 | struct { | |
327 | struct tls_offload_resync_async *resync_async; | |
328 | }; | |
f953d33b | 329 | }; |
2e361176 | 330 | u8 driver_state[] __aligned(8); |
4799ac81 BP |
331 | /* The TLS layer reserves room for driver specific state |
332 | * Currently the belief is that there is not enough | |
333 | * driver specific state to justify another layer of indirection | |
334 | */ | |
2d6b51c6 | 335 | #define TLS_DRIVER_STATE_SIZE_RX 8 |
4799ac81 BP |
336 | }; |
337 | ||
338 | #define TLS_OFFLOAD_CONTEXT_SIZE_RX \ | |
2e361176 | 339 | (sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX) |
4799ac81 | 340 | |
08700dab | 341 | struct tls_context *tls_ctx_create(struct sock *sk); |
15a7dea7 | 342 | void tls_ctx_free(struct sock *sk, struct tls_context *ctx); |
08700dab JK |
343 | void update_sk_prot(struct sock *sk, struct tls_context *ctx); |
344 | ||
3c4d7559 DW |
345 | int wait_on_pending_writer(struct sock *sk, long *timeo); |
346 | int tls_sk_query(struct sock *sk, int optname, char __user *optval, | |
347 | int __user *optlen); | |
348 | int tls_sk_attach(struct sock *sk, int optname, char __user *optval, | |
349 | unsigned int optlen); | |
350 | ||
c46234eb | 351 | int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx); |
318892ac | 352 | void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx); |
313ab004 | 353 | void tls_sw_strparser_done(struct tls_context *tls_ctx); |
3c4d7559 | 354 | int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); |
d4ffb02d WB |
355 | int tls_sw_sendpage_locked(struct sock *sk, struct page *page, |
356 | int offset, size_t size, int flags); | |
3c4d7559 DW |
357 | int tls_sw_sendpage(struct sock *sk, struct page *page, |
358 | int offset, size_t size, int flags); | |
f87e62d4 | 359 | void tls_sw_cancel_work_tx(struct tls_context *tls_ctx); |
313ab004 JF |
360 | void tls_sw_release_resources_tx(struct sock *sk); |
361 | void tls_sw_free_ctx_tx(struct tls_context *tls_ctx); | |
f66de3ee | 362 | void tls_sw_free_resources_rx(struct sock *sk); |
39f56e1a | 363 | void tls_sw_release_resources_rx(struct sock *sk); |
313ab004 | 364 | void tls_sw_free_ctx_rx(struct tls_context *tls_ctx); |
c46234eb DW |
365 | int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
366 | int nonblock, int flags, int *addr_len); | |
924ad65e | 367 | bool tls_sw_stream_read(const struct sock *sk); |
c46234eb DW |
368 | ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, |
369 | struct pipe_inode_info *pipe, | |
370 | size_t len, unsigned int flags); | |
3c4d7559 | 371 | |
e8f69799 IL |
372 | int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); |
373 | int tls_device_sendpage(struct sock *sk, struct page *page, | |
374 | int offset, size_t size, int flags); | |
a42055e8 | 375 | int tls_tx_records(struct sock *sk, int flags); |
e8f69799 | 376 | |
d80a1b9d | 377 | struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, |
e8f69799 IL |
378 | u32 seq, u64 *p_record_sn); |
379 | ||
380 | static inline bool tls_record_is_start_marker(struct tls_record_info *rec) | |
381 | { | |
382 | return rec->len == 0; | |
383 | } | |
384 | ||
385 | static inline u32 tls_record_start_seq(struct tls_record_info *rec) | |
386 | { | |
387 | return rec->end_seq - rec->len; | |
388 | } | |
3c4d7559 DW |
389 | |
390 | int tls_push_sg(struct sock *sk, struct tls_context *ctx, | |
391 | struct scatterlist *sg, u16 first_offset, | |
392 | int flags); | |
a42055e8 VG |
393 | int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, |
394 | int flags); | |
c5daa6cc | 395 | void tls_free_partial_record(struct sock *sk, struct tls_context *ctx); |
a42055e8 | 396 | |
2b794c40 VG |
397 | static inline struct tls_msg *tls_msg(struct sk_buff *skb) |
398 | { | |
399 | return (struct tls_msg *)strp_msg(skb); | |
400 | } | |
401 | ||
94850257 | 402 | static inline bool tls_is_partially_sent_record(struct tls_context *ctx) |
3c4d7559 | 403 | { |
94850257 | 404 | return !!ctx->partially_sent_record; |
3c4d7559 DW |
405 | } |
406 | ||
3c4d7559 DW |
407 | static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) |
408 | { | |
409 | return tls_ctx->pending_open_record_frags; | |
410 | } | |
411 | ||
9932a29a | 412 | static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) |
a42055e8 VG |
413 | { |
414 | struct tls_rec *rec; | |
a42055e8 | 415 | |
9932a29a | 416 | rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); |
a42055e8 VG |
417 | if (!rec) |
418 | return false; | |
419 | ||
9932a29a | 420 | return READ_ONCE(rec->tx_ready); |
a42055e8 VG |
421 | } |
422 | ||
26811cc9 DC |
423 | static inline u16 tls_user_config(struct tls_context *ctx, bool tx) |
424 | { | |
425 | u16 config = tx ? ctx->tx_conf : ctx->rx_conf; | |
426 | ||
427 | switch (config) { | |
428 | case TLS_BASE: | |
429 | return TLS_CONF_BASE; | |
430 | case TLS_SW: | |
431 | return TLS_CONF_SW; | |
432 | case TLS_HW: | |
433 | return TLS_CONF_HW; | |
434 | case TLS_HW_RECORD: | |
435 | return TLS_CONF_HW_RECORD; | |
436 | } | |
437 | return 0; | |
438 | } | |
439 | ||
4799ac81 BP |
440 | struct sk_buff * |
441 | tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, | |
442 | struct sk_buff *skb); | |
443 | ||
e8f69799 IL |
444 | static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk) |
445 | { | |
4799ac81 | 446 | #ifdef CONFIG_SOCK_VALIDATE_XMIT |
b4f47f38 | 447 | return sk_fullsock(sk) && |
4799ac81 BP |
448 | (smp_load_acquire(&sk->sk_validate_xmit_skb) == |
449 | &tls_validate_xmit_skb); | |
450 | #else | |
451 | return false; | |
452 | #endif | |
e8f69799 IL |
453 | } |
454 | ||
f4a8e43f | 455 | static inline void tls_err_abort(struct sock *sk, int err) |
3c4d7559 | 456 | { |
f4a8e43f | 457 | sk->sk_err = err; |
3c4d7559 DW |
458 | sk->sk_error_report(sk); |
459 | } | |
460 | ||
461 | static inline bool tls_bigint_increment(unsigned char *seq, int len) | |
462 | { | |
463 | int i; | |
464 | ||
465 | for (i = len - 1; i >= 0; i--) { | |
466 | ++seq[i]; | |
467 | if (seq[i] != 0) | |
468 | break; | |
469 | } | |
470 | ||
471 | return (i == -1); | |
472 | } | |
473 | ||
4509de14 VG |
474 | static inline struct tls_context *tls_get_ctx(const struct sock *sk) |
475 | { | |
476 | struct inet_connection_sock *icsk = inet_csk(sk); | |
477 | ||
15a7dea7 JK |
478 | /* Use RCU on icsk_ulp_data only for sock diag code, |
479 | * TLS data path doesn't need rcu_dereference(). | |
480 | */ | |
481 | return (__force void *)icsk->icsk_ulp_data; | |
4509de14 VG |
482 | } |
483 | ||
3c4d7559 | 484 | static inline void tls_advance_record_sn(struct sock *sk, |
fb0f886f JK |
485 | struct tls_prot_info *prot, |
486 | struct cipher_context *ctx) | |
3c4d7559 | 487 | { |
4509de14 | 488 | if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) |
f4a8e43f | 489 | tls_err_abort(sk, EBADMSG); |
130b392c | 490 | |
fb0f886f | 491 | if (prot->version != TLS_1_3_VERSION) |
130b392c | 492 | tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, |
4509de14 | 493 | prot->iv_size); |
3c4d7559 DW |
494 | } |
495 | ||
496 | static inline void tls_fill_prepend(struct tls_context *ctx, | |
497 | char *buf, | |
498 | size_t plaintext_len, | |
130b392c DW |
499 | unsigned char record_type, |
500 | int version) | |
3c4d7559 | 501 | { |
4509de14 VG |
502 | struct tls_prot_info *prot = &ctx->prot_info; |
503 | size_t pkt_len, iv_size = prot->iv_size; | |
3c4d7559 | 504 | |
4509de14 | 505 | pkt_len = plaintext_len + prot->tag_size; |
130b392c DW |
506 | if (version != TLS_1_3_VERSION) { |
507 | pkt_len += iv_size; | |
508 | ||
509 | memcpy(buf + TLS_NONCE_OFFSET, | |
510 | ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv_size); | |
511 | } | |
3c4d7559 DW |
512 | |
513 | /* we cover nonce explicit here as well, so buf should be of | |
514 | * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE | |
515 | */ | |
130b392c DW |
516 | buf[0] = version == TLS_1_3_VERSION ? |
517 | TLS_RECORD_TYPE_DATA : record_type; | |
518 | /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ | |
519 | buf[1] = TLS_1_2_VERSION_MINOR; | |
520 | buf[2] = TLS_1_2_VERSION_MAJOR; | |
3c4d7559 DW |
521 | /* we can use IV for nonce explicit according to spec */ |
522 | buf[3] = pkt_len >> 8; | |
523 | buf[4] = pkt_len & 0xFF; | |
3c4d7559 DW |
524 | } |
525 | ||
213ef6e7 IL |
526 | static inline void tls_make_aad(char *buf, |
527 | size_t size, | |
528 | char *record_sequence, | |
529 | int record_sequence_size, | |
130b392c DW |
530 | unsigned char record_type, |
531 | int version) | |
532 | { | |
533 | if (version != TLS_1_3_VERSION) { | |
534 | memcpy(buf, record_sequence, record_sequence_size); | |
535 | buf += 8; | |
536 | } else { | |
537 | size += TLS_CIPHER_AES_GCM_128_TAG_SIZE; | |
538 | } | |
539 | ||
540 | buf[0] = version == TLS_1_3_VERSION ? | |
541 | TLS_RECORD_TYPE_DATA : record_type; | |
542 | buf[1] = TLS_1_2_VERSION_MAJOR; | |
543 | buf[2] = TLS_1_2_VERSION_MINOR; | |
544 | buf[3] = size >> 8; | |
545 | buf[4] = size & 0xFF; | |
546 | } | |
547 | ||
548 | static inline void xor_iv_with_seq(int version, char *iv, char *seq) | |
213ef6e7 | 549 | { |
130b392c | 550 | int i; |
213ef6e7 | 551 | |
130b392c DW |
552 | if (version == TLS_1_3_VERSION) { |
553 | for (i = 0; i < 8; i++) | |
554 | iv[i + 4] ^= seq[i]; | |
555 | } | |
213ef6e7 IL |
556 | } |
557 | ||
3c4d7559 | 558 | |
f66de3ee BP |
559 | static inline struct tls_sw_context_rx *tls_sw_ctx_rx( |
560 | const struct tls_context *tls_ctx) | |
561 | { | |
562 | return (struct tls_sw_context_rx *)tls_ctx->priv_ctx_rx; | |
563 | } | |
564 | ||
565 | static inline struct tls_sw_context_tx *tls_sw_ctx_tx( | |
3c4d7559 DW |
566 | const struct tls_context *tls_ctx) |
567 | { | |
f66de3ee | 568 | return (struct tls_sw_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
569 | } |
570 | ||
d80a1b9d BP |
571 | static inline struct tls_offload_context_tx * |
572 | tls_offload_ctx_tx(const struct tls_context *tls_ctx) | |
3c4d7559 | 573 | { |
d80a1b9d | 574 | return (struct tls_offload_context_tx *)tls_ctx->priv_ctx_tx; |
3c4d7559 DW |
575 | } |
576 | ||
0608c69c JF |
577 | static inline bool tls_sw_has_ctx_tx(const struct sock *sk) |
578 | { | |
579 | struct tls_context *ctx = tls_get_ctx(sk); | |
580 | ||
581 | if (!ctx) | |
582 | return false; | |
583 | return !!tls_sw_ctx_tx(ctx); | |
584 | } | |
585 | ||
e91de6af JF |
586 | static inline bool tls_sw_has_ctx_rx(const struct sock *sk) |
587 | { | |
588 | struct tls_context *ctx = tls_get_ctx(sk); | |
589 | ||
590 | if (!ctx) | |
591 | return false; | |
592 | return !!tls_sw_ctx_rx(ctx); | |
593 | } | |
594 | ||
7463d3a2 BP |
595 | void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); |
596 | void tls_device_write_space(struct sock *sk, struct tls_context *ctx); | |
597 | ||
4799ac81 BP |
598 | static inline struct tls_offload_context_rx * |
599 | tls_offload_ctx_rx(const struct tls_context *tls_ctx) | |
600 | { | |
601 | return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx; | |
602 | } | |
603 | ||
2e361176 JK |
604 | #if IS_ENABLED(CONFIG_TLS_DEVICE) |
605 | static inline void *__tls_driver_ctx(struct tls_context *tls_ctx, | |
606 | enum tls_offload_ctx_dir direction) | |
607 | { | |
608 | if (direction == TLS_OFFLOAD_CTX_DIR_TX) | |
609 | return tls_offload_ctx_tx(tls_ctx)->driver_state; | |
610 | else | |
611 | return tls_offload_ctx_rx(tls_ctx)->driver_state; | |
612 | } | |
613 | ||
614 | static inline void * | |
615 | tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction) | |
616 | { | |
617 | return __tls_driver_ctx(tls_get_ctx(sk), direction); | |
618 | } | |
619 | #endif | |
620 | ||
ed9b7646 BP |
621 | #define RESYNC_REQ BIT(0) |
622 | #define RESYNC_REQ_ASYNC BIT(1) | |
4799ac81 BP |
623 | /* The TLS context is valid until sk_destruct is called */ |
624 | static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq) | |
625 | { | |
626 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
627 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); | |
628 | ||
ed9b7646 BP |
629 | atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | RESYNC_REQ); |
630 | } | |
631 | ||
632 | /* Log all TLS record header TCP sequences in [seq, seq+len] */ | |
633 | static inline void | |
634 | tls_offload_rx_resync_async_request_start(struct sock *sk, __be32 seq, u16 len) | |
635 | { | |
636 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
637 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); | |
638 | ||
639 | atomic64_set(&rx_ctx->resync_async->req, ((u64)ntohl(seq) << 32) | | |
a6ed3ebc | 640 | ((u64)len << 16) | RESYNC_REQ | RESYNC_REQ_ASYNC); |
ed9b7646 BP |
641 | rx_ctx->resync_async->loglen = 0; |
642 | } | |
643 | ||
644 | static inline void | |
645 | tls_offload_rx_resync_async_request_end(struct sock *sk, __be32 seq) | |
646 | { | |
647 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
648 | struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx); | |
649 | ||
650 | atomic64_set(&rx_ctx->resync_async->req, | |
651 | ((u64)ntohl(seq) << 32) | RESYNC_REQ); | |
4799ac81 BP |
652 | } |
653 | ||
f953d33b JK |
654 | static inline void |
655 | tls_offload_rx_resync_set_type(struct sock *sk, enum tls_offload_sync_type type) | |
656 | { | |
657 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
658 | ||
659 | tls_offload_ctx_rx(tls_ctx)->resync_type = type; | |
660 | } | |
4799ac81 | 661 | |
50180074 JK |
662 | /* Driver's seq tracking has to be disabled until resync succeeded */ |
663 | static inline bool tls_offload_tx_resync_pending(struct sock *sk) | |
664 | { | |
665 | struct tls_context *tls_ctx = tls_get_ctx(sk); | |
666 | bool ret; | |
667 | ||
668 | ret = test_bit(TLS_TX_SYNC_SCHED, &tls_ctx->flags); | |
669 | smp_mb__after_atomic(); | |
670 | return ret; | |
671 | } | |
672 | ||
d26b698d JK |
673 | int __net_init tls_proc_init(struct net *net); |
674 | void __net_exit tls_proc_fini(struct net *net); | |
675 | ||
3c4d7559 DW |
676 | int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, |
677 | unsigned char *record_type); | |
dafb67f3 BP |
678 | int decrypt_skb(struct sock *sk, struct sk_buff *skb, |
679 | struct scatterlist *sgout); | |
b9727d7f | 680 | struct sk_buff *tls_encrypt_skb(struct sk_buff *skb); |
3c4d7559 | 681 | |
e8f69799 IL |
682 | struct sk_buff *tls_validate_xmit_skb(struct sock *sk, |
683 | struct net_device *dev, | |
684 | struct sk_buff *skb); | |
685 | ||
686 | int tls_sw_fallback_init(struct sock *sk, | |
d80a1b9d | 687 | struct tls_offload_context_tx *offload_ctx, |
e8f69799 IL |
688 | struct tls_crypto_info *crypto_info); |
689 | ||
be2fbc15 JK |
690 | #ifdef CONFIG_TLS_DEVICE |
691 | void tls_device_init(void); | |
692 | void tls_device_cleanup(void); | |
8d5a49e9 | 693 | void tls_device_sk_destruct(struct sock *sk); |
be2fbc15 JK |
694 | int tls_set_device_offload(struct sock *sk, struct tls_context *ctx); |
695 | void tls_device_free_resources_tx(struct sock *sk); | |
4799ac81 | 696 | int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); |
4799ac81 | 697 | void tls_device_offload_cleanup_rx(struct sock *sk); |
f953d33b | 698 | void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq); |
8538d29c | 699 | void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq); |
4de30a8d JK |
700 | int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, |
701 | struct sk_buff *skb, struct strp_msg *rxm); | |
8d5a49e9 JK |
702 | |
703 | static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk) | |
704 | { | |
705 | if (!sk_fullsock(sk) || | |
706 | smp_load_acquire(&sk->sk_destruct) != tls_device_sk_destruct) | |
707 | return false; | |
708 | return tls_get_ctx(sk)->rx_conf == TLS_HW; | |
709 | } | |
be2fbc15 JK |
710 | #else |
711 | static inline void tls_device_init(void) {} | |
712 | static inline void tls_device_cleanup(void) {} | |
4799ac81 | 713 | |
be2fbc15 JK |
714 | static inline int |
715 | tls_set_device_offload(struct sock *sk, struct tls_context *ctx) | |
716 | { | |
717 | return -EOPNOTSUPP; | |
718 | } | |
719 | ||
720 | static inline void tls_device_free_resources_tx(struct sock *sk) {} | |
721 | ||
722 | static inline int | |
723 | tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) | |
724 | { | |
725 | return -EOPNOTSUPP; | |
726 | } | |
727 | ||
728 | static inline void tls_device_offload_cleanup_rx(struct sock *sk) {} | |
729 | static inline void | |
730 | tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {} | |
731 | ||
4de30a8d JK |
732 | static inline int |
733 | tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx, | |
734 | struct sk_buff *skb, struct strp_msg *rxm) | |
be2fbc15 JK |
735 | { |
736 | return 0; | |
737 | } | |
738 | #endif | |
3c4d7559 | 739 | #endif /* _TLS_OFFLOAD_H */ |