ssl/statem/statem_local.h

   1 /*
   2  * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 HELLO_RETRY_REQUEST_MAX_LENGTH  20000
  23 #define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000
  24 #define SESSION_TICKET_MAX_LENGTH_TLS13 131338
  25 #define SESSION_TICKET_MAX_LENGTH_TLS12 65541
  26 #define SERVER_KEY_EXCH_MAX_LENGTH      102400
  27 #define SERVER_HELLO_DONE_MAX_LENGTH    0
  28 #define KEY_UPDATE_MAX_LENGTH           1
  29 #define CCS_MAX_LENGTH                  1
  30
  31 /* Max ServerHello size permitted by RFC 8446 */
  32 #define SERVER_HELLO_MAX_LENGTH         65607
  33
  34 /* Max should actually be 36 but we are generous */
  35 #define FINISHED_MAX_LENGTH             64
  36
  37 /* Dummy message type */
  38 #define SSL3_MT_DUMMY   -1
  39
  40 extern const unsigned char hrrrandom[];
  41
  42 /* Message processing return codes */
  43 typedef enum {
  44     /* Something bad happened */
  45     MSG_PROCESS_ERROR,
  46     /* We've finished reading - swap to writing */
  47     MSG_PROCESS_FINISHED_READING,
  48     /*
  49      * We've completed the main processing of this message but there is some
  50      * post processing to be done.
  51      */
  52     MSG_PROCESS_CONTINUE_PROCESSING,
  53     /* We've finished this message - read the next message */
  54     MSG_PROCESS_CONTINUE_READING
  55 } MSG_PROCESS_RETURN;
  56
  57 typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
  58
  59 int ssl3_take_mac(SSL *s);
  60 int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
  61                   size_t num_groups, int checkallow);
  62 int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
  63                                   size_t hashlen, const unsigned char *hrr,
  64                                   size_t hrrlen);
  65 int parse_ca_names(SSL *s, PACKET *pkt);
  66 const STACK_OF(X509_NAME) *get_ca_names(SSL *s);
  67 int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt);
  68 size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
  69                                   const void *param, size_t paramlen);
  70
  71 /*
  72  * TLS/DTLS client state machine functions
  73  */
  74 int ossl_statem_client_read_transition(SSL *s, int mt);
  75 WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
  76 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
  77 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
  78 int ossl_statem_client_construct_message(SSL *s,
  79                                          confunc_f *confunc, int *mt);
  80 size_t ossl_statem_client_max_message_size(SSL *s);
  81 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
  82 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
  83
  84 /*
  85  * TLS/DTLS server state machine functions
  86  */
  87 int ossl_statem_server_read_transition(SSL *s, int mt);
  88 WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
  89 WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
  90 WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
  91 int ossl_statem_server_construct_message(SSL *s,
  92                                          confunc_f *confunc,int *mt);
  93 size_t ossl_statem_server_max_message_size(SSL *s);
  94 MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
  95 WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
  96
  97 /* Functions for getting new message data */
  98 __owur int tls_get_message_header(SSL *s, int *mt);
  99 __owur int tls_get_message_body(SSL *s, size_t *len);
 100 __owur int dtls_get_message(SSL *s, int *mt);
 101 __owur int dtls_get_message_body(SSL *s, size_t *len);
 102
 103 /* Message construction and processing functions */
 104 __owur int tls_process_initial_server_flight(SSL *s);
 105 __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
 106 __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
 107 __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
 108 __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
 109
 110 __owur int tls_construct_finished(SSL *s, WPACKET *pkt);
 111 __owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
 112 __owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
 113 __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
 114                                        int stop);
 115 __owur WORK_STATE dtls_wait_for_dry(SSL *s);
 116
 117 /* some client-only functions */
 118 __owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
 119 __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
 120 __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
 121 __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
 122 __owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
 123 __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
 124 __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
 125 __owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
 126 __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
 127 __owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
 128 __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
 129 __owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
 130 __owur int tls_client_key_exchange_post_work(SSL *s);
 131 __owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
 132 __owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
 133 __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
 134 __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
 135 __owur WORK_STATE tls_post_process_server_certificate(SSL *s, WORK_STATE wst);
 136 __owur int ssl3_check_cert_and_algorithm(SSL *s);
 137 #ifndef OPENSSL_NO_NEXTPROTONEG
 138 __owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
 139 #endif
 140 __owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
 141 __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
 142 __owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
 143
 144 /* some server-only functions */
 145 __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
 146 __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
 147 __owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
 148 __owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
 149 __owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
 150 __owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
 151 __owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
 152 __owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
 153 __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
 154 __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
 155 __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
 156 __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
 157 #ifndef OPENSSL_NO_NEXTPROTONEG
 158 __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
 159 #endif
 160 __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
 161 MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
 162
 163 #ifndef OPENSSL_NO_GOST
 164 /* These functions are used in GOST18 CKE, both for client and server */
 165 int ossl_gost18_cke_cipher_nid(const SSL *s);
 166 int ossl_gost_ukm(const SSL *s, unsigned char *dgst_buf);
 167 #endif
 168
 169 /* Extension processing */
 170
 171 typedef enum ext_return_en {
 172     EXT_RETURN_FAIL,
 173     EXT_RETURN_SENT,
 174     EXT_RETURN_NOT_SENT
 175 } EXT_RETURN;
 176
 177 __owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
 178                                      RAW_EXTENSION *exts);
 179 __owur int extension_is_relevant(SSL *s, unsigned int extctx,
 180                                  unsigned int thisctx);
 181 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
 182                                   RAW_EXTENSION **res, size_t *len, int init);
 183 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
 184                                RAW_EXTENSION *exts,  X509 *x, size_t chainidx);
 185 __owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
 186                                     X509 *x, size_t chainidx, int fin);
 187 __owur int should_add_extension(SSL *s, unsigned int extctx,
 188                                 unsigned int thisctx, int max_version);
 189 __owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
 190                                     X509 *x, size_t chainidx);
 191
 192 __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
 193                              const unsigned char *msgstart,
 194                              size_t binderoffset, const unsigned char *binderin,
 195                              unsigned char *binderout,
 196                              SSL_SESSION *sess, int sign, int external);
 197
 198 /* Server Extension processing */
 199 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
 200                                X509 *x, size_t chainidx);
 201 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
 202                                X509 *x, size_t chainidx);
 203 int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
 204                                   X509 *x, size_t chainidx);
 205 #ifndef OPENSSL_NO_SRP
 206 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 207                        size_t chainidx);
 208 #endif
 209 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
 210                               X509 *x, size_t chainidx);
 211 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
 212                                  X509 *x, size_t chainidx);
 213 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
 214                                     X509 *x, size_t chainidxl);
 215 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
 216                                   X509 *x, size_t chainidx);
 217 int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
 218                                  X509 *x, size_t chainidx);
 219 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 220                             size_t chainidx);
 221 #ifndef OPENSSL_NO_OCSP
 222 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
 223                                   X509 *x, size_t chainidx);
 224 #endif
 225 #ifndef OPENSSL_NO_NEXTPROTONEG
 226 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 227                        size_t chainidx);
 228 #endif
 229 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 230                         size_t chainidx);
 231 #ifndef OPENSSL_NO_SRTP
 232 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 233                             size_t chainidx);
 234 #endif
 235 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 236                        size_t chainidx);
 237 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 238                              size_t chainidx);
 239 int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 240                           size_t chainidx);
 241 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 242                        size_t chainidx);
 243 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
 244                                  X509 *x, size_t chainidx);
 245 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 246                        size_t chainidx);
 247 int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
 248                                        X509 *x, size_t chainidx);
 249
 250 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
 251                                           unsigned int context, X509 *x,
 252                                           size_t chainidx);
 253 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
 254                                           unsigned int context, X509 *x,
 255                                           size_t chainidx);
 256 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
 257                                          unsigned int context, X509 *x,
 258                                          size_t chainidx);
 259 EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
 260                                              unsigned int context, X509 *x,
 261                                              size_t chainidx);
 262 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
 263                                             unsigned int context, X509 *x,
 264                                             size_t chainidx);
 265 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
 266                                                unsigned int context, X509 *x,
 267                                                size_t chainidx);
 268 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
 269                                              unsigned int context, X509 *x,
 270                                              size_t chainidx);
 271 #ifndef OPENSSL_NO_OCSP
 272 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
 273                                              unsigned int context, X509 *x,
 274                                              size_t chainidx);
 275 #endif
 276 #ifndef OPENSSL_NO_NEXTPROTONEG
 277 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
 278                                              unsigned int context, X509 *x,
 279                                              size_t chainidx);
 280 #endif
 281 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
 282                                    X509 *x, size_t chainidx);
 283 #ifndef OPENSSL_NO_SRTP
 284 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
 285                                 X509 *x, size_t chainidx);
 286 #endif
 287 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
 288                                   X509 *x, size_t chainidx);
 289 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
 290                                   X509 *x, size_t chainidx);
 291 EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
 292                                                  unsigned int context, X509 *x,
 293                                                  size_t chainidx);
 294 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
 295                                         unsigned int context, X509 *x,
 296                                         size_t chainidx);
 297 EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
 298                                      X509 *x, size_t chainidx);
 299 /*
 300  * Not in public headers as this is not an official extension. Only used when
 301  * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
 302  */
 303 #define TLSEXT_TYPE_cryptopro_bug      0xfde8
 304 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
 305                                             unsigned int context, X509 *x,
 306                                             size_t chainidx);
 307 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
 308                                   X509 *x, size_t chainidx);
 309
 310 /* Client Extension processing */
 311 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
 312                                    X509 *x, size_t chainidx);
 313 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
 314                                    X509 *x, size_t chainidx);
 315 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
 316                                              X509 *x, size_t chainidx);
 317 #ifndef OPENSSL_NO_SRP
 318 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
 319                            size_t chainidx);
 320 #endif
 321 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
 322                                             unsigned int context, X509 *x,
 323                                             size_t chainidx);
 324 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
 325                                                unsigned int context, X509 *x,
 326                                                size_t chainidx);
 327
 328 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
 329                                          unsigned int context, X509 *x,
 330                                          size_t chainidx);
 331 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
 332                                              unsigned int context, X509 *x,
 333                                              size_t chainidx);
 334 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
 335                                        unsigned int context, X509 *x,
 336                                        size_t chainidx);
 337 #ifndef OPENSSL_NO_OCSP
 338 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
 339                                              unsigned int context, X509 *x,
 340                                              size_t chainidx);
 341 #endif
 342 #ifndef OPENSSL_NO_NEXTPROTONEG
 343 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
 344                                   X509 *x, size_t chainidx);
 345 #endif
 346 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
 347                                    X509 *x, size_t chainidx);
 348 #ifndef OPENSSL_NO_SRTP
 349 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
 350                                        X509 *x, size_t chainidx);
 351 #endif
 352 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
 353                                   X509 *x, size_t chainidx);
 354 #ifndef OPENSSL_NO_CT
 355 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
 356                                   X509 *x, size_t chainidx);
 357 #endif
 358 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
 359                                   X509 *x, size_t chainidx);
 360 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
 361                                                  unsigned int context, X509 *x,
 362                                                  size_t chainidx);
 363 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
 364                                         unsigned int context, X509 *x,
 365                                         size_t chainidx);
 366 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
 367                                             unsigned int context, X509 *x,
 368                                             size_t chainidx);
 369 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
 370                                      X509 *x, size_t chainidx);
 371 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
 372                                       unsigned int context, X509 *x,
 373                                       size_t chainidx);
 374 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
 375                                   X509 *x, size_t chainidx);
 376 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
 377                                                   X509 *x, size_t chainidx);
 378
 379 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
 380                                X509 *x, size_t chainidx);
 381 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
 382                                X509 *x, size_t chainidx);
 383 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
 384                               X509 *x, size_t chainidx);
 385 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
 386                                   X509 *x, size_t chainidx);
 387 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
 388                                  X509 *x, size_t chainidx);
 389 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
 390                                   X509 *x, size_t chainidx);
 391 #ifndef OPENSSL_NO_OCSP
 392 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
 393                                   X509 *x, size_t chainidx);
 394 #endif
 395 #ifndef OPENSSL_NO_CT
 396 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 397                        size_t chainidx);
 398 #endif
 399 #ifndef OPENSSL_NO_NEXTPROTONEG
 400 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 401                        size_t chainidx);
 402 #endif
 403 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 404                         size_t chainidx);
 405 #ifndef OPENSSL_NO_SRTP
 406 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 407                             size_t chainidx);
 408 #endif
 409 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 410                        size_t chainidx);
 411 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 412                        size_t chainidx);
 413 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
 414                                       X509 *x, size_t chainidx);
 415 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 416                              size_t chainidx);
 417 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 418                        size_t chainidx);
 419 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 420                        size_t chainidx);
 421
 422 int tls_handle_alpn(SSL *s);
 423
 424 int tls13_save_handshake_digest_for_pha(SSL *s);
 425 int tls13_restore_handshake_digest_for_pha(SSL *s);