Don't calculate the Finished MAC twice
[openssl.git] / ssl / statem / statem_locl.h
1 /*
2  * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9
10 /*****************************************************************************
11  *                                                                           *
12  * The following definitions are PRIVATE to the state machine. They should   *
13  * NOT be used outside of the state machine.                                 *
14  *                                                                           *
15  *****************************************************************************/
16
17 /* Max message length definitions */
18
19 /* The spec allows for a longer length than this, but we limit it */
20 #define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
21 #define END_OF_EARLY_DATA_MAX_LENGTH    0
22 #define SERVER_HELLO_MAX_LENGTH         20000
23 #define HELLO_RETRY_REQUEST_MAX_LENGTH  20000
24 #define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000
25 #define SERVER_KEY_EXCH_MAX_LENGTH      102400
26 #define SERVER_HELLO_DONE_MAX_LENGTH    0
27 #define KEY_UPDATE_MAX_LENGTH           1
28 #define CCS_MAX_LENGTH                  1
29 /* Max should actually be 36 but we are generous */
30 #define FINISHED_MAX_LENGTH             64
31
32 /* The maximum number of incoming KeyUpdate messages we will accept */
33 #define MAX_KEY_UPDATE_MESSAGES     32
34
35 /* Dummy message type */
36 #define SSL3_MT_DUMMY   -1
37
38 extern const unsigned char hrrrandom[];
39
40 /* Message processing return codes */
41 typedef enum {
42     /* Something bad happened */
43     MSG_PROCESS_ERROR,
44     /* We've finished reading - swap to writing */
45     MSG_PROCESS_FINISHED_READING,
46     /*
47      * We've completed the main processing of this message but there is some
48      * post processing to be done.
49      */
50     MSG_PROCESS_CONTINUE_PROCESSING,
51     /* We've finished this message - read the next message */
52     MSG_PROCESS_CONTINUE_READING
53 } MSG_PROCESS_RETURN;
54
55 typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
56
57 int ssl3_take_mac(SSL *s);
58 int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
59                   size_t num_groups, int checkallow);
60 int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
61                                   size_t hashlen, const unsigned char *hrr,
62                                   size_t hrrlen);
63 int parse_ca_names(SSL *s, PACKET *pkt);
64 int construct_ca_names(SSL *s, WPACKET *pkt);
65 size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
66                                   const void *param, size_t paramlen);
67
68 /*
69  * TLS/DTLS client state machine functions
70  */
71 int ossl_statem_client_read_transition(SSL *s, int mt);
72 WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
73 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
74 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
75 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
76                                          confunc_f *confunc, int *mt);
77 size_t ossl_statem_client_max_message_size(SSL *s);
78 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
79 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
80
81 /*
82  * TLS/DTLS server state machine functions
83  */
84 int ossl_statem_server_read_transition(SSL *s, int mt);
85 WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
86 WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
87 WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
88 int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
89                                          confunc_f *confunc,int *mt);
90 size_t ossl_statem_server_max_message_size(SSL *s);
91 MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
92 WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
93
94 /* Functions for getting new message data */
95 __owur int tls_get_message_header(SSL *s, int *mt);
96 __owur int tls_get_message_body(SSL *s, size_t *len);
97 __owur int dtls_get_message(SSL *s, int *mt, size_t *len);
98
99 /* Message construction and processing functions */
100 __owur int tls_process_initial_server_flight(SSL *s);
101 __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
102 __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
103 __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
104 __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
105
106 __owur int tls_construct_finished(SSL *s, WPACKET *pkt);
107 __owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
108 __owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
109 __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
110                                        int stop);
111 __owur WORK_STATE dtls_wait_for_dry(SSL *s);
112
113 /* some client-only functions */
114 __owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
115 __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
116 __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
117 __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
118 __owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
119 __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
120 __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
121 __owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
122 __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
123 __owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
124 __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
125 __owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
126 __owur int tls_client_key_exchange_post_work(SSL *s);
127 __owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
128 __owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
129 __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
130 __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
131 __owur int ssl3_check_cert_and_algorithm(SSL *s);
132 #ifndef OPENSSL_NO_NEXTPROTONEG
133 __owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
134 #endif
135 __owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
136 __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
137 __owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
138
139 /* some server-only functions */
140 __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
141 __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
142 __owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
143 __owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
144 __owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
145 __owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
146 __owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
147 __owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
148 __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
149 __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
150 __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
151 __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
152 #ifndef OPENSSL_NO_NEXTPROTONEG
153 __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
154 #endif
155 __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
156 MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
157
158
159 /* Extension processing */
160
161 typedef enum ext_return_en {
162     EXT_RETURN_FAIL,
163     EXT_RETURN_SENT,
164     EXT_RETURN_NOT_SENT
165 } EXT_RETURN;
166
167 __owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
168                                      RAW_EXTENSION *exts);
169 __owur int extension_is_relevant(SSL *s, unsigned int extctx,
170                                  unsigned int thisctx);
171 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
172                                   RAW_EXTENSION **res, size_t *len, int init);
173 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
174                                RAW_EXTENSION *exts,  X509 *x, size_t chainidx);
175 __owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
176                                     X509 *x, size_t chainidx, int fin);
177 __owur int should_add_extension(SSL *s, unsigned int extctx,
178                                 unsigned int thisctx, int max_version);
179 __owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
180                                     X509 *x, size_t chainidx);
181
182 __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
183                              const unsigned char *msgstart,
184                              size_t binderoffset, const unsigned char *binderin,
185                              unsigned char *binderout,
186                              SSL_SESSION *sess, int sign, int external);
187
188 /* Server Extension processing */
189 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
190                                X509 *x, size_t chainidx);
191 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
192                                X509 *x, size_t chainidx);
193 int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
194                                   X509 *x, size_t chainidx);
195 #ifndef OPENSSL_NO_SRP
196 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
197                        size_t chainidx);
198 #endif
199 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
200                               X509 *x, size_t chainidx);
201 #ifndef OPENSSL_NO_EC
202 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
203                                  X509 *x, size_t chainidx);
204 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
205                                     X509 *x, size_t chainidxl);
206 #endif
207 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
208                                   X509 *x, size_t chainidx);
209 int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
210                                  X509 *x, size_t chainidx);
211 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
212                             size_t chainidx);
213 #ifndef OPENSSL_NO_OCSP
214 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
215                                   X509 *x, size_t chainidx);
216 #endif
217 #ifndef OPENSSL_NO_NEXTPROTONEG
218 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
219                        size_t chainidx);
220 #endif
221 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
222                         size_t chainidx);
223 #ifndef OPENSSL_NO_SRTP
224 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
225                             size_t chainidx);
226 #endif
227 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
228                        size_t chainidx);
229 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
230                              size_t chainidx);
231 int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
232                           size_t chainidx);
233 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
234                        size_t chainidx);
235 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
236                                  X509 *x, size_t chainidx);
237 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
238                        size_t chainidx);
239 int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
240                                        X509 *x, size_t chainidx);
241
242 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
243                                           unsigned int context, X509 *x,
244                                           size_t chainidx);
245 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
246                                           unsigned int context, X509 *x,
247                                           size_t chainidx);
248 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
249                                          unsigned int context, X509 *x,
250                                          size_t chainidx);
251 EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
252                                              unsigned int context, X509 *x,
253                                              size_t chainidx);
254 #ifndef OPENSSL_NO_EC
255 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
256                                             unsigned int context, X509 *x,
257                                             size_t chainidx);
258 #endif
259 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
260                                                unsigned int context, X509 *x,
261                                                size_t chainidx);
262 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
263                                              unsigned int context, X509 *x,
264                                              size_t chainidx);
265 #ifndef OPENSSL_NO_OCSP
266 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
267                                              unsigned int context, X509 *x,
268                                              size_t chainidx);
269 #endif
270 #ifndef OPENSSL_NO_NEXTPROTONEG
271 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
272                                              unsigned int context, X509 *x,
273                                              size_t chainidx);
274 #endif
275 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
276                                    X509 *x, size_t chainidx);
277 #ifndef OPENSSL_NO_SRTP
278 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
279                                 X509 *x, size_t chainidx);
280 #endif
281 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
282                                   X509 *x, size_t chainidx);
283 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
284                                   X509 *x, size_t chainidx);
285 EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
286                                                  unsigned int context, X509 *x,
287                                                  size_t chainidx);
288 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
289                                         unsigned int context, X509 *x,
290                                         size_t chainidx);
291 EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
292                                      X509 *x, size_t chainidx);
293 /*
294  * Not in public headers as this is not an official extension. Only used when
295  * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
296  */
297 #define TLSEXT_TYPE_cryptopro_bug      0xfde8
298 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
299                                             unsigned int context, X509 *x,
300                                             size_t chainidx);
301 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
302                                   X509 *x, size_t chainidx);
303
304 /* Client Extension processing */
305 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
306                                    X509 *x, size_t chainidx);
307 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
308                                    X509 *x, size_t chainidx);
309 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
310                                              X509 *x, size_t chainidx);
311 #ifndef OPENSSL_NO_SRP
312 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
313                            size_t chainidx);
314 #endif
315 #ifndef OPENSSL_NO_EC
316 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
317                                             unsigned int context, X509 *x,
318                                             size_t chainidx);
319 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
320                                                unsigned int context, X509 *x,
321                                                size_t chainidx);
322 #endif
323 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
324                                          unsigned int context, X509 *x,
325                                          size_t chainidx);
326 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
327                                              unsigned int context, X509 *x,
328                                              size_t chainidx);
329 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
330                                        unsigned int context, X509 *x,
331                                        size_t chainidx);
332 #ifndef OPENSSL_NO_OCSP
333 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
334                                              unsigned int context, X509 *x,
335                                              size_t chainidx);
336 #endif
337 #ifndef OPENSSL_NO_NEXTPROTONEG
338 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
339                                   X509 *x, size_t chainidx);
340 #endif
341 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
342                                    X509 *x, size_t chainidx);
343 #ifndef OPENSSL_NO_SRTP
344 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
345                                        X509 *x, size_t chainidx);
346 #endif
347 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
348                                   X509 *x, size_t chainidx);
349 #ifndef OPENSSL_NO_CT
350 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
351                                   X509 *x, size_t chainidx);
352 #endif
353 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
354                                   X509 *x, size_t chainidx);
355 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
356                                                  unsigned int context, X509 *x,
357                                                  size_t chainidx);
358 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
359                                         unsigned int context, X509 *x,
360                                         size_t chainidx);
361 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
362                                             unsigned int context, X509 *x,
363                                             size_t chainidx);
364 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
365                                      X509 *x, size_t chainidx);
366 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
367                                       unsigned int context, X509 *x,
368                                       size_t chainidx);
369 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
370                                   X509 *x, size_t chainidx);
371 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
372                                                   X509 *x, size_t chainidx);
373
374 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
375                                X509 *x, size_t chainidx);
376 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
377                                X509 *x, size_t chainidx);
378 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
379                               X509 *x, size_t chainidx);
380 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
381                                   X509 *x, size_t chainidx);
382 #ifndef OPENSSL_NO_EC
383 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
384                                  X509 *x, size_t chainidx);
385 #endif
386 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
387                                   X509 *x, size_t chainidx);
388 #ifndef OPENSSL_NO_OCSP
389 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
390                                   X509 *x, size_t chainidx);
391 #endif
392 #ifndef OPENSSL_NO_CT
393 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
394                        size_t chainidx);
395 #endif
396 #ifndef OPENSSL_NO_NEXTPROTONEG
397 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
398                        size_t chainidx);
399 #endif
400 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
401                         size_t chainidx);
402 #ifndef OPENSSL_NO_SRTP
403 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
404                             size_t chainidx);
405 #endif
406 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
407                        size_t chainidx);
408 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
409                        size_t chainidx);
410 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
411                                       X509 *x, size_t chainidx);
412 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
413                              size_t chainidx);
414 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
415                        size_t chainidx);
416 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
417                        size_t chainidx);
418
419 int tls_handle_alpn(SSL *s);
420
421 int tls13_save_handshake_digest_for_pha(SSL *s);
422 int tls13_restore_handshake_digest_for_pha(SSL *s);