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1/*
2 * Copyright (c) 2016 Tom Herbert <tom@herbertland.com>
3 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#ifndef _TLS_INT_H
36#define _TLS_INT_H
37
38#include <asm/byteorder.h>
39#include <linux/types.h>
40#include <linux/skmsg.h>
41#include <net/tls.h>
42
43#define TLS_PAGE_ORDER (min_t(unsigned int, PAGE_ALLOC_COSTLY_ORDER, \
44 TLS_MAX_PAYLOAD_SIZE >> PAGE_SHIFT))
45
46#define __TLS_INC_STATS(net, field) \
47 __SNMP_INC_STATS((net)->mib.tls_statistics, field)
48#define TLS_INC_STATS(net, field) \
49 SNMP_INC_STATS((net)->mib.tls_statistics, field)
50#define TLS_DEC_STATS(net, field) \
51 SNMP_DEC_STATS((net)->mib.tls_statistics, field)
52
53/* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
54 * allocated or mapped for each TLS record. After encryption, the records are
55 * stores in a linked list.
56 */
57struct tls_rec {
58 struct list_head list;
59 int tx_ready;
60 int tx_flags;
61
62 struct sk_msg msg_plaintext;
63 struct sk_msg msg_encrypted;
64
65 /* AAD | msg_plaintext.sg.data | sg_tag */
66 struct scatterlist sg_aead_in[2];
67 /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
68 struct scatterlist sg_aead_out[2];
69
70 char content_type;
71 struct scatterlist sg_content_type;
72
73 char aad_space[TLS_AAD_SPACE_SIZE];
74 u8 iv_data[MAX_IV_SIZE];
75 struct aead_request aead_req;
76 u8 aead_req_ctx[];
77};
78
79int __net_init tls_proc_init(struct net *net);
80void __net_exit tls_proc_fini(struct net *net);
81
82struct tls_context *tls_ctx_create(struct sock *sk);
83void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
84void update_sk_prot(struct sock *sk, struct tls_context *ctx);
85
86int wait_on_pending_writer(struct sock *sk, long *timeo);
87int tls_sk_query(struct sock *sk, int optname, char __user *optval,
88 int __user *optlen);
89int tls_sk_attach(struct sock *sk, int optname, char __user *optval,
90 unsigned int optlen);
91void tls_err_abort(struct sock *sk, int err);
92
93int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
94void tls_update_rx_zc_capable(struct tls_context *tls_ctx);
95void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
96void tls_sw_strparser_done(struct tls_context *tls_ctx);
97int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
98int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
99 int offset, size_t size, int flags);
100int tls_sw_sendpage(struct sock *sk, struct page *page,
101 int offset, size_t size, int flags);
102void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
103void tls_sw_release_resources_tx(struct sock *sk);
104void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
105void tls_sw_free_resources_rx(struct sock *sk);
106void tls_sw_release_resources_rx(struct sock *sk);
107void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
108int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
109 int flags, int *addr_len);
110bool tls_sw_sock_is_readable(struct sock *sk);
111ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
112 struct pipe_inode_info *pipe,
113 size_t len, unsigned int flags);
114
115int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
116int tls_device_sendpage(struct sock *sk, struct page *page,
117 int offset, size_t size, int flags);
118int tls_tx_records(struct sock *sk, int flags);
119
120void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
121void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
122
123int tls_process_cmsg(struct sock *sk, struct msghdr *msg,
124 unsigned char *record_type);
125int decrypt_skb(struct sock *sk, struct scatterlist *sgout);
126
127int tls_sw_fallback_init(struct sock *sk,
128 struct tls_offload_context_tx *offload_ctx,
129 struct tls_crypto_info *crypto_info);
130
131int tls_strp_dev_init(void);
132void tls_strp_dev_exit(void);
133
134void tls_strp_done(struct tls_strparser *strp);
135void tls_strp_stop(struct tls_strparser *strp);
136int tls_strp_init(struct tls_strparser *strp, struct sock *sk);
137void tls_strp_data_ready(struct tls_strparser *strp);
138
139void tls_strp_check_rcv(struct tls_strparser *strp);
140void tls_strp_msg_done(struct tls_strparser *strp);
141
142int tls_rx_msg_size(struct tls_strparser *strp, struct sk_buff *skb);
143void tls_rx_msg_ready(struct tls_strparser *strp);
144
145void tls_strp_msg_load(struct tls_strparser *strp, bool force_refresh);
146int tls_strp_msg_cow(struct tls_sw_context_rx *ctx);
147struct sk_buff *tls_strp_msg_detach(struct tls_sw_context_rx *ctx);
148int tls_strp_msg_hold(struct tls_strparser *strp, struct sk_buff_head *dst);
149
150static inline struct tls_msg *tls_msg(struct sk_buff *skb)
151{
152 struct sk_skb_cb *scb = (struct sk_skb_cb *)skb->cb;
153
154 return &scb->tls;
155}
156
157static inline struct sk_buff *tls_strp_msg(struct tls_sw_context_rx *ctx)
158{
159 DEBUG_NET_WARN_ON_ONCE(!ctx->strp.msg_ready || !ctx->strp.anchor->len);
160 return ctx->strp.anchor;
161}
162
163static inline bool tls_strp_msg_ready(struct tls_sw_context_rx *ctx)
164{
165 return ctx->strp.msg_ready;
166}
167
168#ifdef CONFIG_TLS_DEVICE
169int tls_device_init(void);
170void tls_device_cleanup(void);
171int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
172void tls_device_free_resources_tx(struct sock *sk);
173int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
174void tls_device_offload_cleanup_rx(struct sock *sk);
175void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
176int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx);
177#else
178static inline int tls_device_init(void) { return 0; }
179static inline void tls_device_cleanup(void) {}
180
181static inline int
182tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
183{
184 return -EOPNOTSUPP;
185}
186
187static inline void tls_device_free_resources_tx(struct sock *sk) {}
188
189static inline int
190tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
191{
192 return -EOPNOTSUPP;
193}
194
195static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
196static inline void
197tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}
198
199static inline int
200tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx)
201{
202 return 0;
203}
204#endif
205
206int tls_push_sg(struct sock *sk, struct tls_context *ctx,
207 struct scatterlist *sg, u16 first_offset,
208 int flags);
209int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
210 int flags);
211void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
212
213static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
214{
215 return !!ctx->partially_sent_record;
216}
217
218static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
219{
220 return tls_ctx->pending_open_record_frags;
221}
222
223static inline bool tls_bigint_increment(unsigned char *seq, int len)
224{
225 int i;
226
227 for (i = len - 1; i >= 0; i--) {
228 ++seq[i];
229 if (seq[i] != 0)
230 break;
231 }
232
233 return (i == -1);
234}
235
236static inline void tls_bigint_subtract(unsigned char *seq, int n)
237{
238 u64 rcd_sn;
239 __be64 *p;
240
241 BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8);
242
243 p = (__be64 *)seq;
244 rcd_sn = be64_to_cpu(*p);
245 *p = cpu_to_be64(rcd_sn - n);
246}
247
248static inline void
249tls_advance_record_sn(struct sock *sk, struct tls_prot_info *prot,
250 struct cipher_context *ctx)
251{
252 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
253 tls_err_abort(sk, -EBADMSG);
254
255 if (prot->version != TLS_1_3_VERSION &&
256 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305)
257 tls_bigint_increment(ctx->iv + prot->salt_size,
258 prot->iv_size);
259}
260
261static inline void
262tls_xor_iv_with_seq(struct tls_prot_info *prot, char *iv, char *seq)
263{
264 int i;
265
266 if (prot->version == TLS_1_3_VERSION ||
267 prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) {
268 for (i = 0; i < 8; i++)
269 iv[i + 4] ^= seq[i];
270 }
271}
272
273static inline void
274tls_fill_prepend(struct tls_context *ctx, char *buf, size_t plaintext_len,
275 unsigned char record_type)
276{
277 struct tls_prot_info *prot = &ctx->prot_info;
278 size_t pkt_len, iv_size = prot->iv_size;
279
280 pkt_len = plaintext_len + prot->tag_size;
281 if (prot->version != TLS_1_3_VERSION &&
282 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) {
283 pkt_len += iv_size;
284
285 memcpy(buf + TLS_NONCE_OFFSET,
286 ctx->tx.iv + prot->salt_size, iv_size);
287 }
288
289 /* we cover nonce explicit here as well, so buf should be of
290 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
291 */
292 buf[0] = prot->version == TLS_1_3_VERSION ?
293 TLS_RECORD_TYPE_DATA : record_type;
294 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
295 buf[1] = TLS_1_2_VERSION_MINOR;
296 buf[2] = TLS_1_2_VERSION_MAJOR;
297 /* we can use IV for nonce explicit according to spec */
298 buf[3] = pkt_len >> 8;
299 buf[4] = pkt_len & 0xFF;
300}
301
302static inline
303void tls_make_aad(char *buf, size_t size, char *record_sequence,
304 unsigned char record_type, struct tls_prot_info *prot)
305{
306 if (prot->version != TLS_1_3_VERSION) {
307 memcpy(buf, record_sequence, prot->rec_seq_size);
308 buf += 8;
309 } else {
310 size += prot->tag_size;
311 }
312
313 buf[0] = prot->version == TLS_1_3_VERSION ?
314 TLS_RECORD_TYPE_DATA : record_type;
315 buf[1] = TLS_1_2_VERSION_MAJOR;
316 buf[2] = TLS_1_2_VERSION_MINOR;
317 buf[3] = size >> 8;
318 buf[4] = size & 0xFF;
319}
320
321#endif
1/*
2 * Copyright (c) 2016 Tom Herbert <tom@herbertland.com>
3 * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#ifndef _TLS_INT_H
36#define _TLS_INT_H
37
38#include <asm/byteorder.h>
39#include <linux/types.h>
40#include <linux/skmsg.h>
41#include <net/tls.h>
42#include <net/tls_prot.h>
43
44#define TLS_PAGE_ORDER (min_t(unsigned int, PAGE_ALLOC_COSTLY_ORDER, \
45 TLS_MAX_PAYLOAD_SIZE >> PAGE_SHIFT))
46
47#define __TLS_INC_STATS(net, field) \
48 __SNMP_INC_STATS((net)->mib.tls_statistics, field)
49#define TLS_INC_STATS(net, field) \
50 SNMP_INC_STATS((net)->mib.tls_statistics, field)
51#define TLS_DEC_STATS(net, field) \
52 SNMP_DEC_STATS((net)->mib.tls_statistics, field)
53
54struct tls_cipher_desc {
55 unsigned int nonce;
56 unsigned int iv;
57 unsigned int key;
58 unsigned int salt;
59 unsigned int tag;
60 unsigned int rec_seq;
61 unsigned int iv_offset;
62 unsigned int key_offset;
63 unsigned int salt_offset;
64 unsigned int rec_seq_offset;
65 char *cipher_name;
66 bool offloadable;
67 size_t crypto_info;
68};
69
70#define TLS_CIPHER_MIN TLS_CIPHER_AES_GCM_128
71#define TLS_CIPHER_MAX TLS_CIPHER_ARIA_GCM_256
72extern const struct tls_cipher_desc tls_cipher_desc[TLS_CIPHER_MAX + 1 - TLS_CIPHER_MIN];
73
74static inline const struct tls_cipher_desc *get_cipher_desc(u16 cipher_type)
75{
76 if (cipher_type < TLS_CIPHER_MIN || cipher_type > TLS_CIPHER_MAX)
77 return NULL;
78
79 return &tls_cipher_desc[cipher_type - TLS_CIPHER_MIN];
80}
81
82static inline char *crypto_info_iv(struct tls_crypto_info *crypto_info,
83 const struct tls_cipher_desc *cipher_desc)
84{
85 return (char *)crypto_info + cipher_desc->iv_offset;
86}
87
88static inline char *crypto_info_key(struct tls_crypto_info *crypto_info,
89 const struct tls_cipher_desc *cipher_desc)
90{
91 return (char *)crypto_info + cipher_desc->key_offset;
92}
93
94static inline char *crypto_info_salt(struct tls_crypto_info *crypto_info,
95 const struct tls_cipher_desc *cipher_desc)
96{
97 return (char *)crypto_info + cipher_desc->salt_offset;
98}
99
100static inline char *crypto_info_rec_seq(struct tls_crypto_info *crypto_info,
101 const struct tls_cipher_desc *cipher_desc)
102{
103 return (char *)crypto_info + cipher_desc->rec_seq_offset;
104}
105
106
107/* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
108 * allocated or mapped for each TLS record. After encryption, the records are
109 * stores in a linked list.
110 */
111struct tls_rec {
112 struct list_head list;
113 int tx_ready;
114 int tx_flags;
115
116 struct sk_msg msg_plaintext;
117 struct sk_msg msg_encrypted;
118
119 /* AAD | msg_plaintext.sg.data | sg_tag */
120 struct scatterlist sg_aead_in[2];
121 /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
122 struct scatterlist sg_aead_out[2];
123
124 char content_type;
125 struct scatterlist sg_content_type;
126
127 struct sock *sk;
128
129 char aad_space[TLS_AAD_SPACE_SIZE];
130 u8 iv_data[TLS_MAX_IV_SIZE];
131 struct aead_request aead_req;
132 u8 aead_req_ctx[];
133};
134
135int __net_init tls_proc_init(struct net *net);
136void __net_exit tls_proc_fini(struct net *net);
137
138struct tls_context *tls_ctx_create(struct sock *sk);
139void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
140void update_sk_prot(struct sock *sk, struct tls_context *ctx);
141
142int wait_on_pending_writer(struct sock *sk, long *timeo);
143void tls_err_abort(struct sock *sk, int err);
144
145int init_prot_info(struct tls_prot_info *prot,
146 const struct tls_crypto_info *crypto_info,
147 const struct tls_cipher_desc *cipher_desc);
148int tls_set_sw_offload(struct sock *sk, int tx);
149void tls_update_rx_zc_capable(struct tls_context *tls_ctx);
150void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
151void tls_sw_strparser_done(struct tls_context *tls_ctx);
152int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
153void tls_sw_splice_eof(struct socket *sock);
154void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
155void tls_sw_release_resources_tx(struct sock *sk);
156void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
157void tls_sw_free_resources_rx(struct sock *sk);
158void tls_sw_release_resources_rx(struct sock *sk);
159void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
160int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
161 int flags, int *addr_len);
162bool tls_sw_sock_is_readable(struct sock *sk);
163ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
164 struct pipe_inode_info *pipe,
165 size_t len, unsigned int flags);
166int tls_sw_read_sock(struct sock *sk, read_descriptor_t *desc,
167 sk_read_actor_t read_actor);
168
169int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
170void tls_device_splice_eof(struct socket *sock);
171int tls_tx_records(struct sock *sk, int flags);
172
173void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
174void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
175
176int tls_process_cmsg(struct sock *sk, struct msghdr *msg,
177 unsigned char *record_type);
178int decrypt_skb(struct sock *sk, struct scatterlist *sgout);
179
180int tls_sw_fallback_init(struct sock *sk,
181 struct tls_offload_context_tx *offload_ctx,
182 struct tls_crypto_info *crypto_info);
183
184int tls_strp_dev_init(void);
185void tls_strp_dev_exit(void);
186
187void tls_strp_done(struct tls_strparser *strp);
188void tls_strp_stop(struct tls_strparser *strp);
189int tls_strp_init(struct tls_strparser *strp, struct sock *sk);
190void tls_strp_data_ready(struct tls_strparser *strp);
191
192void tls_strp_check_rcv(struct tls_strparser *strp);
193void tls_strp_msg_done(struct tls_strparser *strp);
194
195int tls_rx_msg_size(struct tls_strparser *strp, struct sk_buff *skb);
196void tls_rx_msg_ready(struct tls_strparser *strp);
197
198void tls_strp_msg_load(struct tls_strparser *strp, bool force_refresh);
199int tls_strp_msg_cow(struct tls_sw_context_rx *ctx);
200struct sk_buff *tls_strp_msg_detach(struct tls_sw_context_rx *ctx);
201int tls_strp_msg_hold(struct tls_strparser *strp, struct sk_buff_head *dst);
202
203static inline struct tls_msg *tls_msg(struct sk_buff *skb)
204{
205 struct sk_skb_cb *scb = (struct sk_skb_cb *)skb->cb;
206
207 return &scb->tls;
208}
209
210static inline struct sk_buff *tls_strp_msg(struct tls_sw_context_rx *ctx)
211{
212 DEBUG_NET_WARN_ON_ONCE(!ctx->strp.msg_ready || !ctx->strp.anchor->len);
213 return ctx->strp.anchor;
214}
215
216static inline bool tls_strp_msg_ready(struct tls_sw_context_rx *ctx)
217{
218 return READ_ONCE(ctx->strp.msg_ready);
219}
220
221static inline bool tls_strp_msg_mixed_decrypted(struct tls_sw_context_rx *ctx)
222{
223 return ctx->strp.mixed_decrypted;
224}
225
226#ifdef CONFIG_TLS_DEVICE
227int tls_device_init(void);
228void tls_device_cleanup(void);
229int tls_set_device_offload(struct sock *sk);
230void tls_device_free_resources_tx(struct sock *sk);
231int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
232void tls_device_offload_cleanup_rx(struct sock *sk);
233void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
234int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx);
235#else
236static inline int tls_device_init(void) { return 0; }
237static inline void tls_device_cleanup(void) {}
238
239static inline int
240tls_set_device_offload(struct sock *sk)
241{
242 return -EOPNOTSUPP;
243}
244
245static inline void tls_device_free_resources_tx(struct sock *sk) {}
246
247static inline int
248tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
249{
250 return -EOPNOTSUPP;
251}
252
253static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
254static inline void
255tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}
256
257static inline int
258tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx)
259{
260 return 0;
261}
262#endif
263
264int tls_push_sg(struct sock *sk, struct tls_context *ctx,
265 struct scatterlist *sg, u16 first_offset,
266 int flags);
267int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
268 int flags);
269void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
270
271static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
272{
273 return !!ctx->partially_sent_record;
274}
275
276static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
277{
278 return tls_ctx->pending_open_record_frags;
279}
280
281static inline bool tls_bigint_increment(unsigned char *seq, int len)
282{
283 int i;
284
285 for (i = len - 1; i >= 0; i--) {
286 ++seq[i];
287 if (seq[i] != 0)
288 break;
289 }
290
291 return (i == -1);
292}
293
294static inline void tls_bigint_subtract(unsigned char *seq, int n)
295{
296 u64 rcd_sn;
297 __be64 *p;
298
299 BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8);
300
301 p = (__be64 *)seq;
302 rcd_sn = be64_to_cpu(*p);
303 *p = cpu_to_be64(rcd_sn - n);
304}
305
306static inline void
307tls_advance_record_sn(struct sock *sk, struct tls_prot_info *prot,
308 struct cipher_context *ctx)
309{
310 if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
311 tls_err_abort(sk, -EBADMSG);
312
313 if (prot->version != TLS_1_3_VERSION &&
314 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305)
315 tls_bigint_increment(ctx->iv + prot->salt_size,
316 prot->iv_size);
317}
318
319static inline void
320tls_xor_iv_with_seq(struct tls_prot_info *prot, char *iv, char *seq)
321{
322 int i;
323
324 if (prot->version == TLS_1_3_VERSION ||
325 prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) {
326 for (i = 0; i < 8; i++)
327 iv[i + 4] ^= seq[i];
328 }
329}
330
331static inline void
332tls_fill_prepend(struct tls_context *ctx, char *buf, size_t plaintext_len,
333 unsigned char record_type)
334{
335 struct tls_prot_info *prot = &ctx->prot_info;
336 size_t pkt_len, iv_size = prot->iv_size;
337
338 pkt_len = plaintext_len + prot->tag_size;
339 if (prot->version != TLS_1_3_VERSION &&
340 prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) {
341 pkt_len += iv_size;
342
343 memcpy(buf + TLS_NONCE_OFFSET,
344 ctx->tx.iv + prot->salt_size, iv_size);
345 }
346
347 /* we cover nonce explicit here as well, so buf should be of
348 * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
349 */
350 buf[0] = prot->version == TLS_1_3_VERSION ?
351 TLS_RECORD_TYPE_DATA : record_type;
352 /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
353 buf[1] = TLS_1_2_VERSION_MINOR;
354 buf[2] = TLS_1_2_VERSION_MAJOR;
355 /* we can use IV for nonce explicit according to spec */
356 buf[3] = pkt_len >> 8;
357 buf[4] = pkt_len & 0xFF;
358}
359
360static inline
361void tls_make_aad(char *buf, size_t size, char *record_sequence,
362 unsigned char record_type, struct tls_prot_info *prot)
363{
364 if (prot->version != TLS_1_3_VERSION) {
365 memcpy(buf, record_sequence, prot->rec_seq_size);
366 buf += 8;
367 } else {
368 size += prot->tag_size;
369 }
370
371 buf[0] = prot->version == TLS_1_3_VERSION ?
372 TLS_RECORD_TYPE_DATA : record_type;
373 buf[1] = TLS_1_2_VERSION_MAJOR;
374 buf[2] = TLS_1_2_VERSION_MINOR;
375 buf[3] = size >> 8;
376 buf[4] = size & 0xFF;
377}
378
379#endif