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 /* 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);