ssl/statem/statem_locl.h

   1 /*
   2  * Copyright 2015-2018 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 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 const STACK_OF(X509_NAME) *get_ca_names(SSL *s);
  65 int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt);
  66 size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
  67                                   const void *param, size_t paramlen);
  68
  69 /*
  70  * TLS/DTLS client state machine functions
  71  */
  72 int ossl_statem_client_read_transition(SSL *s, int mt);
  73 WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
  74 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
  75 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
  76 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
  77                                          confunc_f *confunc, int *mt);
  78 size_t ossl_statem_client_max_message_size(SSL *s);
  79 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
  80 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
  81
  82 /*
  83  * TLS/DTLS server state machine functions
  84  */
  85 int ossl_statem_server_read_transition(SSL *s, int mt);
  86 WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
  87 WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
  88 WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
  89 int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
  90                                          confunc_f *confunc,int *mt);
  91 size_t ossl_statem_server_max_message_size(SSL *s);
  92 MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
  93 WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
  94
  95 /* Functions for getting new message data */
  96 __owur int tls_get_message_header(SSL *s, int *mt);
  97 __owur int tls_get_message_body(SSL *s, size_t *len);
  98 __owur int dtls_get_message(SSL *s, int *mt, size_t *len);
  99
 100 /* Message construction and processing functions */
 101 __owur int tls_process_initial_server_flight(SSL *s);
 102 __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
 103 __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
 104 __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
 105 __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
 106
 107 __owur int tls_construct_finished(SSL *s, WPACKET *pkt);
 108 __owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
 109 __owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
 110 __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
 111                                        int stop);
 112 __owur WORK_STATE dtls_wait_for_dry(SSL *s);
 113
 114 /* some client-only functions */
 115 __owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
 116 __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
 117 __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
 118 __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
 119 __owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
 120 __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
 121 __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
 122 __owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
 123 __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
 124 __owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
 125 __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
 126 __owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
 127 __owur int tls_client_key_exchange_post_work(SSL *s);
 128 __owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
 129 __owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
 130 __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
 131 __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
 132 __owur int ssl3_check_cert_and_algorithm(SSL *s);
 133 #ifndef OPENSSL_NO_NEXTPROTONEG
 134 __owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
 135 #endif
 136 __owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
 137 __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
 138 __owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
 139
 140 /* some server-only functions */
 141 __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
 142 __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
 143 __owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
 144 __owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
 145 __owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
 146 __owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
 147 __owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
 148 __owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
 149 __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
 150 __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
 151 __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
 152 __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
 153 #ifndef OPENSSL_NO_NEXTPROTONEG
 154 __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
 155 #endif
 156 __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
 157 MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
 158
 159
 160 /* Extension processing */
 161
 162 typedef enum ext_return_en {
 163     EXT_RETURN_FAIL,
 164     EXT_RETURN_SENT,
 165     EXT_RETURN_NOT_SENT
 166 } EXT_RETURN;
 167
 168 __owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
 169                                      RAW_EXTENSION *exts);
 170 __owur int extension_is_relevant(SSL *s, unsigned int extctx,
 171                                  unsigned int thisctx);
 172 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
 173                                   RAW_EXTENSION **res, size_t *len, int init);
 174 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
 175                                RAW_EXTENSION *exts,  X509 *x, size_t chainidx);
 176 __owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
 177                                     X509 *x, size_t chainidx, int fin);
 178 __owur int should_add_extension(SSL *s, unsigned int extctx,
 179                                 unsigned int thisctx, int max_version);
 180 __owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
 181                                     X509 *x, size_t chainidx);
 182
 183 __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
 184                              const unsigned char *msgstart,
 185                              size_t binderoffset, const unsigned char *binderin,
 186                              unsigned char *binderout,
 187                              SSL_SESSION *sess, int sign, int external);
 188
 189 /* Server Extension processing */
 190 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
 191                                X509 *x, size_t chainidx);
 192 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
 193                                X509 *x, size_t chainidx);
 194 int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
 195                                   X509 *x, size_t chainidx);
 196 #ifndef OPENSSL_NO_SRP
 197 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 198                        size_t chainidx);
 199 #endif
 200 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
 201                               X509 *x, size_t chainidx);
 202 #ifndef OPENSSL_NO_EC
 203 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
 204                                  X509 *x, size_t chainidx);
 205 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
 206                                     X509 *x, size_t chainidxl);
 207 #endif
 208 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
 209                                   X509 *x, size_t chainidx);
 210 int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
 211                                  X509 *x, size_t chainidx);
 212 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 213                             size_t chainidx);
 214 #ifndef OPENSSL_NO_OCSP
 215 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
 216                                   X509 *x, size_t chainidx);
 217 #endif
 218 #ifndef OPENSSL_NO_NEXTPROTONEG
 219 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 220                        size_t chainidx);
 221 #endif
 222 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 223                         size_t chainidx);
 224 #ifndef OPENSSL_NO_SRTP
 225 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 226                             size_t chainidx);
 227 #endif
 228 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 229                        size_t chainidx);
 230 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 231                              size_t chainidx);
 232 int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 233                           size_t chainidx);
 234 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 235                        size_t chainidx);
 236 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
 237                                  X509 *x, size_t chainidx);
 238 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 239                        size_t chainidx);
 240 int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
 241                                        X509 *x, size_t chainidx);
 242
 243 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
 244                                           unsigned int context, X509 *x,
 245                                           size_t chainidx);
 246 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
 247                                           unsigned int context, X509 *x,
 248                                           size_t chainidx);
 249 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
 250                                          unsigned int context, X509 *x,
 251                                          size_t chainidx);
 252 EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
 253                                              unsigned int context, X509 *x,
 254                                              size_t chainidx);
 255 #ifndef OPENSSL_NO_EC
 256 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
 257                                             unsigned int context, X509 *x,
 258                                             size_t chainidx);
 259 #endif
 260 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
 261                                                unsigned int context, X509 *x,
 262                                                size_t chainidx);
 263 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
 264                                              unsigned int context, X509 *x,
 265                                              size_t chainidx);
 266 #ifndef OPENSSL_NO_OCSP
 267 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
 268                                              unsigned int context, X509 *x,
 269                                              size_t chainidx);
 270 #endif
 271 #ifndef OPENSSL_NO_NEXTPROTONEG
 272 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
 273                                              unsigned int context, X509 *x,
 274                                              size_t chainidx);
 275 #endif
 276 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
 277                                    X509 *x, size_t chainidx);
 278 #ifndef OPENSSL_NO_SRTP
 279 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
 280                                 X509 *x, size_t chainidx);
 281 #endif
 282 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
 283                                   X509 *x, size_t chainidx);
 284 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
 285                                   X509 *x, size_t chainidx);
 286 EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
 287                                                  unsigned int context, X509 *x,
 288                                                  size_t chainidx);
 289 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
 290                                         unsigned int context, X509 *x,
 291                                         size_t chainidx);
 292 EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
 293                                      X509 *x, size_t chainidx);
 294 /*
 295  * Not in public headers as this is not an official extension. Only used when
 296  * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
 297  */
 298 #define TLSEXT_TYPE_cryptopro_bug      0xfde8
 299 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
 300                                             unsigned int context, X509 *x,
 301                                             size_t chainidx);
 302 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
 303                                   X509 *x, size_t chainidx);
 304
 305 /* Client Extension processing */
 306 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
 307                                    X509 *x, size_t chainidx);
 308 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
 309                                    X509 *x, size_t chainidx);
 310 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
 311                                              X509 *x, size_t chainidx);
 312 #ifndef OPENSSL_NO_SRP
 313 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
 314                            size_t chainidx);
 315 #endif
 316 #ifndef OPENSSL_NO_EC
 317 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
 318                                             unsigned int context, X509 *x,
 319                                             size_t chainidx);
 320 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
 321                                                unsigned int context, X509 *x,
 322                                                size_t chainidx);
 323 #endif
 324 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
 325                                          unsigned int context, X509 *x,
 326                                          size_t chainidx);
 327 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
 328                                              unsigned int context, X509 *x,
 329                                              size_t chainidx);
 330 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
 331                                        unsigned int context, X509 *x,
 332                                        size_t chainidx);
 333 #ifndef OPENSSL_NO_OCSP
 334 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
 335                                              unsigned int context, X509 *x,
 336                                              size_t chainidx);
 337 #endif
 338 #ifndef OPENSSL_NO_NEXTPROTONEG
 339 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
 340                                   X509 *x, size_t chainidx);
 341 #endif
 342 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
 343                                    X509 *x, size_t chainidx);
 344 #ifndef OPENSSL_NO_SRTP
 345 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
 346                                        X509 *x, size_t chainidx);
 347 #endif
 348 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
 349                                   X509 *x, size_t chainidx);
 350 #ifndef OPENSSL_NO_CT
 351 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
 352                                   X509 *x, size_t chainidx);
 353 #endif
 354 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
 355                                   X509 *x, size_t chainidx);
 356 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
 357                                                  unsigned int context, X509 *x,
 358                                                  size_t chainidx);
 359 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
 360                                         unsigned int context, X509 *x,
 361                                         size_t chainidx);
 362 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
 363                                             unsigned int context, X509 *x,
 364                                             size_t chainidx);
 365 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
 366                                      X509 *x, size_t chainidx);
 367 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
 368                                       unsigned int context, X509 *x,
 369                                       size_t chainidx);
 370 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
 371                                   X509 *x, size_t chainidx);
 372 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
 373                                                   X509 *x, size_t chainidx);
 374
 375 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
 376                                X509 *x, size_t chainidx);
 377 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
 378                                X509 *x, size_t chainidx);
 379 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
 380                               X509 *x, size_t chainidx);
 381 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
 382                                   X509 *x, size_t chainidx);
 383 #ifndef OPENSSL_NO_EC
 384 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
 385                                  X509 *x, size_t chainidx);
 386 #endif
 387 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
 388                                   X509 *x, size_t chainidx);
 389 #ifndef OPENSSL_NO_OCSP
 390 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
 391                                   X509 *x, size_t chainidx);
 392 #endif
 393 #ifndef OPENSSL_NO_CT
 394 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 395                        size_t chainidx);
 396 #endif
 397 #ifndef OPENSSL_NO_NEXTPROTONEG
 398 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 399                        size_t chainidx);
 400 #endif
 401 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 402                         size_t chainidx);
 403 #ifndef OPENSSL_NO_SRTP
 404 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 405                             size_t chainidx);
 406 #endif
 407 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 408                        size_t chainidx);
 409 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 410                        size_t chainidx);
 411 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
 412                                       X509 *x, size_t chainidx);
 413 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 414                              size_t chainidx);
 415 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 416                        size_t chainidx);
 417 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 418                        size_t chainidx);
 419
 420 int tls_handle_alpn(SSL *s);
 421
 422 int tls13_save_handshake_digest_for_pha(SSL *s);
 423 int tls13_restore_handshake_digest_for_pha(SSL *s);