ssl/statem/statem_locl.h

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