ssl/statem/statem_local.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 #ifndef OPENSSL_NO_GOST
 157 /* These functions are used in GOST18 CKE, both for client and server */
 158 int gost18_cke_cipher_nid(const SSL *s);
 159 int gost_ukm(const SSL *s, unsigned char *dgst_buf);
 160 #endif
 161
 162 /* Extension processing */
 163
 164 typedef enum ext_return_en {
 165     EXT_RETURN_FAIL,
 166     EXT_RETURN_SENT,
 167     EXT_RETURN_NOT_SENT
 168 } EXT_RETURN;
 169
 170 __owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
 171                                      RAW_EXTENSION *exts);
 172 __owur int extension_is_relevant(SSL *s, unsigned int extctx,
 173                                  unsigned int thisctx);
 174 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
 175                                   RAW_EXTENSION **res, size_t *len, int init);
 176 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
 177                                RAW_EXTENSION *exts,  X509 *x, size_t chainidx);
 178 __owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
 179                                     X509 *x, size_t chainidx, int fin);
 180 __owur int should_add_extension(SSL *s, unsigned int extctx,
 181                                 unsigned int thisctx, int max_version);
 182 __owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
 183                                     X509 *x, size_t chainidx);
 184
 185 __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
 186                              const unsigned char *msgstart,
 187                              size_t binderoffset, const unsigned char *binderin,
 188                              unsigned char *binderout,
 189                              SSL_SESSION *sess, int sign, int external);
 190
 191 /* Server Extension processing */
 192 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
 193                                X509 *x, size_t chainidx);
 194 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
 195                                X509 *x, size_t chainidx);
 196 int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
 197                                   X509 *x, size_t chainidx);
 198 #ifndef OPENSSL_NO_SRP
 199 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 200                        size_t chainidx);
 201 #endif
 202 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
 203                               X509 *x, size_t chainidx);
 204 #ifndef OPENSSL_NO_EC
 205 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
 206                                  X509 *x, size_t chainidx);
 207 #endif
 208 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
 209                                     X509 *x, size_t chainidxl);
 210 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
 211                                   X509 *x, size_t chainidx);
 212 int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
 213                                  X509 *x, size_t chainidx);
 214 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 215                             size_t chainidx);
 216 #ifndef OPENSSL_NO_OCSP
 217 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
 218                                   X509 *x, size_t chainidx);
 219 #endif
 220 #ifndef OPENSSL_NO_NEXTPROTONEG
 221 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 222                        size_t chainidx);
 223 #endif
 224 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 225                         size_t chainidx);
 226 #ifndef OPENSSL_NO_SRTP
 227 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 228                             size_t chainidx);
 229 #endif
 230 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 231                        size_t chainidx);
 232 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 233                              size_t chainidx);
 234 int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 235                           size_t chainidx);
 236 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 237                        size_t chainidx);
 238 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
 239                                  X509 *x, size_t chainidx);
 240 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 241                        size_t chainidx);
 242 int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
 243                                        X509 *x, size_t chainidx);
 244
 245 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
 246                                           unsigned int context, X509 *x,
 247                                           size_t chainidx);
 248 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
 249                                           unsigned int context, X509 *x,
 250                                           size_t chainidx);
 251 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
 252                                          unsigned int context, X509 *x,
 253                                          size_t chainidx);
 254 EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
 255                                              unsigned int context, X509 *x,
 256                                              size_t chainidx);
 257 #ifndef OPENSSL_NO_EC
 258 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
 259                                             unsigned int context, X509 *x,
 260                                             size_t chainidx);
 261 #endif
 262 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
 263                                                unsigned int context, X509 *x,
 264                                                size_t chainidx);
 265 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
 266                                              unsigned int context, X509 *x,
 267                                              size_t chainidx);
 268 #ifndef OPENSSL_NO_OCSP
 269 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
 270                                              unsigned int context, X509 *x,
 271                                              size_t chainidx);
 272 #endif
 273 #ifndef OPENSSL_NO_NEXTPROTONEG
 274 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
 275                                              unsigned int context, X509 *x,
 276                                              size_t chainidx);
 277 #endif
 278 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
 279                                    X509 *x, size_t chainidx);
 280 #ifndef OPENSSL_NO_SRTP
 281 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
 282                                 X509 *x, size_t chainidx);
 283 #endif
 284 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
 285                                   X509 *x, size_t chainidx);
 286 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
 287                                   X509 *x, size_t chainidx);
 288 EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
 289                                                  unsigned int context, X509 *x,
 290                                                  size_t chainidx);
 291 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
 292                                         unsigned int context, X509 *x,
 293                                         size_t chainidx);
 294 EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
 295                                      X509 *x, size_t chainidx);
 296 /*
 297  * Not in public headers as this is not an official extension. Only used when
 298  * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
 299  */
 300 #define TLSEXT_TYPE_cryptopro_bug      0xfde8
 301 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
 302                                             unsigned int context, X509 *x,
 303                                             size_t chainidx);
 304 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
 305                                   X509 *x, size_t chainidx);
 306
 307 /* Client Extension processing */
 308 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
 309                                    X509 *x, size_t chainidx);
 310 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
 311                                    X509 *x, size_t chainidx);
 312 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
 313                                              X509 *x, size_t chainidx);
 314 #ifndef OPENSSL_NO_SRP
 315 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
 316                            size_t chainidx);
 317 #endif
 318 #ifndef OPENSSL_NO_EC
 319 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
 320                                             unsigned int context, X509 *x,
 321                                             size_t chainidx);
 322 #endif
 323 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
 324                                                unsigned int context, X509 *x,
 325                                                size_t chainidx);
 326
 327 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
 328                                          unsigned int context, X509 *x,
 329                                          size_t chainidx);
 330 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
 331                                              unsigned int context, X509 *x,
 332                                              size_t chainidx);
 333 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
 334                                        unsigned int context, X509 *x,
 335                                        size_t chainidx);
 336 #ifndef OPENSSL_NO_OCSP
 337 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
 338                                              unsigned int context, X509 *x,
 339                                              size_t chainidx);
 340 #endif
 341 #ifndef OPENSSL_NO_NEXTPROTONEG
 342 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
 343                                   X509 *x, size_t chainidx);
 344 #endif
 345 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
 346                                    X509 *x, size_t chainidx);
 347 #ifndef OPENSSL_NO_SRTP
 348 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
 349                                        X509 *x, size_t chainidx);
 350 #endif
 351 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
 352                                   X509 *x, size_t chainidx);
 353 #ifndef OPENSSL_NO_CT
 354 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
 355                                   X509 *x, size_t chainidx);
 356 #endif
 357 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
 358                                   X509 *x, size_t chainidx);
 359 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
 360                                                  unsigned int context, X509 *x,
 361                                                  size_t chainidx);
 362 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
 363                                         unsigned int context, X509 *x,
 364                                         size_t chainidx);
 365 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
 366                                             unsigned int context, X509 *x,
 367                                             size_t chainidx);
 368 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
 369                                      X509 *x, size_t chainidx);
 370 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
 371                                       unsigned int context, X509 *x,
 372                                       size_t chainidx);
 373 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
 374                                   X509 *x, size_t chainidx);
 375 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
 376                                                   X509 *x, size_t chainidx);
 377
 378 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
 379                                X509 *x, size_t chainidx);
 380 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
 381                                X509 *x, size_t chainidx);
 382 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
 383                               X509 *x, size_t chainidx);
 384 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
 385                                   X509 *x, size_t chainidx);
 386 #ifndef OPENSSL_NO_EC
 387 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
 388                                  X509 *x, size_t chainidx);
 389 #endif
 390 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
 391                                   X509 *x, size_t chainidx);
 392 #ifndef OPENSSL_NO_OCSP
 393 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
 394                                   X509 *x, size_t chainidx);
 395 #endif
 396 #ifndef OPENSSL_NO_CT
 397 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 398                        size_t chainidx);
 399 #endif
 400 #ifndef OPENSSL_NO_NEXTPROTONEG
 401 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 402                        size_t chainidx);
 403 #endif
 404 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 405                         size_t chainidx);
 406 #ifndef OPENSSL_NO_SRTP
 407 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 408                             size_t chainidx);
 409 #endif
 410 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 411                        size_t chainidx);
 412 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 413                        size_t chainidx);
 414 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
 415                                       X509 *x, size_t chainidx);
 416 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 417                              size_t chainidx);
 418 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 419                        size_t chainidx);
 420 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 421                        size_t chainidx);
 422
 423 int tls_handle_alpn(SSL *s);
 424
 425 int tls13_save_handshake_digest_for_pha(SSL *s);
 426 int tls13_restore_handshake_digest_for_pha(SSL *s);