f936c61bc83498f485af2b58778bfbad72cf4398
[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 /* Dummy message type */
33 #define SSL3_MT_DUMMY   -1
34
35 extern const unsigned char hrrrandom[];
36
37 /* Message processing return codes */
38 typedef enum {
39     /* Something bad happened */
40     MSG_PROCESS_ERROR,
41     /* We've finished reading - swap to writing */
42     MSG_PROCESS_FINISHED_READING,
43     /*
44      * We've completed the main processing of this message but there is some
45      * post processing to be done.
46      */
47     MSG_PROCESS_CONTINUE_PROCESSING,
48     /* We've finished this message - read the next message */
49     MSG_PROCESS_CONTINUE_READING
50 } MSG_PROCESS_RETURN;
51
52 typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
53
54 int ssl3_take_mac(SSL *s);
55 int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
56                   size_t num_groups, int checkallow);
57 int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
58                                   size_t hashlen, const unsigned char *hrr,
59                                   size_t hrrlen);
60 int parse_ca_names(SSL *s, PACKET *pkt);
61 const STACK_OF(X509_NAME) *get_ca_names(SSL *s);
62 int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt);
63 size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
64                                   const void *param, size_t paramlen);
65
66 /*
67  * TLS/DTLS client state machine functions
68  */
69 int ossl_statem_client_read_transition(SSL *s, int mt);
70 WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
71 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
72 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
73 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
74                                          confunc_f *confunc, int *mt);
75 size_t ossl_statem_client_max_message_size(SSL *s);
76 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
77 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
78
79 /*
80  * TLS/DTLS server state machine functions
81  */
82 int ossl_statem_server_read_transition(SSL *s, int mt);
83 WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
84 WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
85 WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
86 int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
87                                          confunc_f *confunc,int *mt);
88 size_t ossl_statem_server_max_message_size(SSL *s);
89 MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
90 WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
91
92 /* Functions for getting new message data */
93 __owur int tls_get_message_header(SSL *s, int *mt);
94 __owur int tls_get_message_body(SSL *s, size_t *len);
95 __owur int dtls_get_message(SSL *s, int *mt, size_t *len);
96
97 /* Message construction and processing functions */
98 __owur int tls_process_initial_server_flight(SSL *s);
99 __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
100 __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
101 __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
102 __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
103
104 __owur int tls_construct_finished(SSL *s, WPACKET *pkt);
105 __owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
106 __owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
107 __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
108                                        int stop);
109 __owur WORK_STATE dtls_wait_for_dry(SSL *s);
110
111 /* some client-only functions */
112 __owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
113 __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
114 __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
115 __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
116 __owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
117 __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
118 __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
119 __owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
120 __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
121 __owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
122 __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
123 __owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
124 __owur int tls_client_key_exchange_post_work(SSL *s);
125 __owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
126 __owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
127 __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
128 __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
129 __owur int ssl3_check_cert_and_algorithm(SSL *s);
130 #ifndef OPENSSL_NO_NEXTPROTONEG
131 __owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
132 #endif
133 __owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
134 __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
135 __owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
136
137 /* some server-only functions */
138 __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
139 __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
140 __owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
141 __owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
142 __owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
143 __owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
144 __owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
145 __owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
146 __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
147 __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
148 __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
149 __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
150 #ifndef OPENSSL_NO_NEXTPROTONEG
151 __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
152 #endif
153 __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
154 MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
155
156
157 /* Extension processing */
158
159 typedef enum ext_return_en {
160     EXT_RETURN_FAIL,
161     EXT_RETURN_SENT,
162     EXT_RETURN_NOT_SENT
163 } EXT_RETURN;
164
165 __owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
166                                      RAW_EXTENSION *exts);
167 __owur int extension_is_relevant(SSL *s, unsigned int extctx,
168                                  unsigned int thisctx);
169 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
170                                   RAW_EXTENSION **res, size_t *len, int init);
171 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
172                                RAW_EXTENSION *exts,  X509 *x, size_t chainidx);
173 __owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
174                                     X509 *x, size_t chainidx, int fin);
175 __owur int should_add_extension(SSL *s, unsigned int extctx,
176                                 unsigned int thisctx, int max_version);
177 __owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
178                                     X509 *x, size_t chainidx);
179
180 __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
181                              const unsigned char *msgstart,
182                              size_t binderoffset, const unsigned char *binderin,
183                              unsigned char *binderout,
184                              SSL_SESSION *sess, int sign, int external);
185
186 /* Server Extension processing */
187 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
188                                X509 *x, size_t chainidx);
189 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
190                                X509 *x, size_t chainidx);
191 int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
192                                   X509 *x, size_t chainidx);
193 #ifndef OPENSSL_NO_SRP
194 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
195                        size_t chainidx);
196 #endif
197 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
198                               X509 *x, size_t chainidx);
199 #ifndef OPENSSL_NO_EC
200 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
201                                  X509 *x, size_t chainidx);
202 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
203                                     X509 *x, size_t chainidxl);
204 #endif
205 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
206                                   X509 *x, size_t chainidx);
207 int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
208                                  X509 *x, size_t chainidx);
209 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
210                             size_t chainidx);
211 #ifndef OPENSSL_NO_OCSP
212 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
213                                   X509 *x, size_t chainidx);
214 #endif
215 #ifndef OPENSSL_NO_NEXTPROTONEG
216 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
217                        size_t chainidx);
218 #endif
219 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
220                         size_t chainidx);
221 #ifndef OPENSSL_NO_SRTP
222 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
223                             size_t chainidx);
224 #endif
225 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
226                        size_t chainidx);
227 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
228                              size_t chainidx);
229 int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
230                           size_t chainidx);
231 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
232                        size_t chainidx);
233 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
234                                  X509 *x, size_t chainidx);
235 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
236                        size_t chainidx);
237 int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
238                                        X509 *x, size_t chainidx);
239
240 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
241                                           unsigned int context, X509 *x,
242                                           size_t chainidx);
243 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
244                                           unsigned int context, X509 *x,
245                                           size_t chainidx);
246 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
247                                          unsigned int context, X509 *x,
248                                          size_t chainidx);
249 EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
250                                              unsigned int context, X509 *x,
251                                              size_t chainidx);
252 #ifndef OPENSSL_NO_EC
253 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
254                                             unsigned int context, X509 *x,
255                                             size_t chainidx);
256 #endif
257 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
258                                                unsigned int context, X509 *x,
259                                                size_t chainidx);
260 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
261                                              unsigned int context, X509 *x,
262                                              size_t chainidx);
263 #ifndef OPENSSL_NO_OCSP
264 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
265                                              unsigned int context, X509 *x,
266                                              size_t chainidx);
267 #endif
268 #ifndef OPENSSL_NO_NEXTPROTONEG
269 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
270                                              unsigned int context, X509 *x,
271                                              size_t chainidx);
272 #endif
273 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
274                                    X509 *x, size_t chainidx);
275 #ifndef OPENSSL_NO_SRTP
276 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
277                                 X509 *x, size_t chainidx);
278 #endif
279 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
280                                   X509 *x, size_t chainidx);
281 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
282                                   X509 *x, size_t chainidx);
283 EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
284                                                  unsigned int context, X509 *x,
285                                                  size_t chainidx);
286 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
287                                         unsigned int context, X509 *x,
288                                         size_t chainidx);
289 EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
290                                      X509 *x, size_t chainidx);
291 /*
292  * Not in public headers as this is not an official extension. Only used when
293  * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
294  */
295 #define TLSEXT_TYPE_cryptopro_bug      0xfde8
296 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
297                                             unsigned int context, X509 *x,
298                                             size_t chainidx);
299 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
300                                   X509 *x, size_t chainidx);
301
302 /* Client Extension processing */
303 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
304                                    X509 *x, size_t chainidx);
305 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
306                                    X509 *x, size_t chainidx);
307 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
308                                              X509 *x, size_t chainidx);
309 #ifndef OPENSSL_NO_SRP
310 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
311                            size_t chainidx);
312 #endif
313 #ifndef OPENSSL_NO_EC
314 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
315                                             unsigned int context, X509 *x,
316                                             size_t chainidx);
317 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
318                                                unsigned int context, X509 *x,
319                                                size_t chainidx);
320 #endif
321 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
322                                          unsigned int context, X509 *x,
323                                          size_t chainidx);
324 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
325                                              unsigned int context, X509 *x,
326                                              size_t chainidx);
327 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
328                                        unsigned int context, X509 *x,
329                                        size_t chainidx);
330 #ifndef OPENSSL_NO_OCSP
331 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
332                                              unsigned int context, X509 *x,
333                                              size_t chainidx);
334 #endif
335 #ifndef OPENSSL_NO_NEXTPROTONEG
336 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
337                                   X509 *x, size_t chainidx);
338 #endif
339 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
340                                    X509 *x, size_t chainidx);
341 #ifndef OPENSSL_NO_SRTP
342 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
343                                        X509 *x, size_t chainidx);
344 #endif
345 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
346                                   X509 *x, size_t chainidx);
347 #ifndef OPENSSL_NO_CT
348 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
349                                   X509 *x, size_t chainidx);
350 #endif
351 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
352                                   X509 *x, size_t chainidx);
353 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
354                                                  unsigned int context, X509 *x,
355                                                  size_t chainidx);
356 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
357                                         unsigned int context, X509 *x,
358                                         size_t chainidx);
359 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
360                                             unsigned int context, X509 *x,
361                                             size_t chainidx);
362 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
363                                      X509 *x, size_t chainidx);
364 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
365                                       unsigned int context, X509 *x,
366                                       size_t chainidx);
367 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
368                                   X509 *x, size_t chainidx);
369 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
370                                                   X509 *x, size_t chainidx);
371
372 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
373                                X509 *x, size_t chainidx);
374 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
375                                X509 *x, size_t chainidx);
376 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
377                               X509 *x, size_t chainidx);
378 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
379                                   X509 *x, size_t chainidx);
380 #ifndef OPENSSL_NO_EC
381 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
382                                  X509 *x, size_t chainidx);
383 #endif
384 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
385                                   X509 *x, size_t chainidx);
386 #ifndef OPENSSL_NO_OCSP
387 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
388                                   X509 *x, size_t chainidx);
389 #endif
390 #ifndef OPENSSL_NO_CT
391 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
392                        size_t chainidx);
393 #endif
394 #ifndef OPENSSL_NO_NEXTPROTONEG
395 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
396                        size_t chainidx);
397 #endif
398 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
399                         size_t chainidx);
400 #ifndef OPENSSL_NO_SRTP
401 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
402                             size_t chainidx);
403 #endif
404 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
405                        size_t chainidx);
406 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
407                        size_t chainidx);
408 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
409                                       X509 *x, size_t chainidx);
410 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
411                              size_t chainidx);
412 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
413                        size_t chainidx);
414 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
415                        size_t chainidx);
416
417 int tls_handle_alpn(SSL *s);
418
419 int tls13_save_handshake_digest_for_pha(SSL *s);
420 int tls13_restore_handshake_digest_for_pha(SSL *s);