1 /* 2 * Copyright 2015-2022 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 /***************************************************************************** 11 * * 12 * The following definitions are PRIVATE to the state machine. They should * 13 * NOT be used outside of the state machine. * 14 * * 15 *****************************************************************************/ 16 17 /* Max message length definitions */ 18 19 /* The spec allows for a longer length than this, but we limit it */ 20 #define HELLO_VERIFY_REQUEST_MAX_LENGTH 258 21 #define END_OF_EARLY_DATA_MAX_LENGTH 0 22 #define HELLO_RETRY_REQUEST_MAX_LENGTH 20000 23 #define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000 24 #define SESSION_TICKET_MAX_LENGTH_TLS13 131338 25 #define SESSION_TICKET_MAX_LENGTH_TLS12 65541 26 #define SERVER_KEY_EXCH_MAX_LENGTH 102400 27 #define SERVER_HELLO_DONE_MAX_LENGTH 0 28 #define KEY_UPDATE_MAX_LENGTH 1 29 #define CCS_MAX_LENGTH 1 30 31 /* Max ServerHello size permitted by RFC 8446 */ 32 #define SERVER_HELLO_MAX_LENGTH 65607 33 34 /* Max should actually be 36 but we are generous */ 35 #define FINISHED_MAX_LENGTH 64 36 37 /* Dummy message type */ 38 #define SSL3_MT_DUMMY -1 39 40 /* Invalid extension ID for non-supported extensions */ 41 #define TLSEXT_TYPE_invalid 0x10000 42 #define TLSEXT_TYPE_out_of_range 0x10001 43 unsigned int ossl_get_extension_type(size_t idx); 44 45 extern const unsigned char hrrrandom[]; 46 47 /* Message processing return codes */ 48 typedef enum { 49 /* Something bad happened */ 50 MSG_PROCESS_ERROR, 51 /* We've finished reading - swap to writing */ 52 MSG_PROCESS_FINISHED_READING, 53 /* 54 * We've completed the main processing of this message but there is some 55 * post processing to be done. 56 */ 57 MSG_PROCESS_CONTINUE_PROCESSING, 58 /* We've finished this message - read the next message */ 59 MSG_PROCESS_CONTINUE_READING 60 } MSG_PROCESS_RETURN; 61 62 typedef int (*confunc_f) (SSL *s, WPACKET *pkt); 63 64 int ssl3_take_mac(SSL *s); 65 int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups, 66 size_t num_groups, int checkallow); 67 int create_synthetic_message_hash(SSL *s, const unsigned char *hashval, 68 size_t hashlen, const unsigned char *hrr, 69 size_t hrrlen); 70 int parse_ca_names(SSL *s, PACKET *pkt); 71 const STACK_OF(X509_NAME) *get_ca_names(SSL *s); 72 int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt); 73 size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs, 74 const void *param, size_t paramlen); 75 76 /* 77 * TLS/DTLS client state machine functions 78 */ 79 int ossl_statem_client_read_transition(SSL *s, int mt); 80 WRITE_TRAN ossl_statem_client_write_transition(SSL *s); 81 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst); 82 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst); 83 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, 84 confunc_f *confunc, int *mt); 85 size_t ossl_statem_client_max_message_size(SSL *s); 86 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt); 87 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst); 88 89 /* 90 * TLS/DTLS server state machine functions 91 */ 92 int ossl_statem_server_read_transition(SSL *s, int mt); 93 WRITE_TRAN ossl_statem_server_write_transition(SSL *s); 94 WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst); 95 WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst); 96 int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt, 97 confunc_f *confunc,int *mt); 98 size_t ossl_statem_server_max_message_size(SSL *s); 99 MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt); 100 WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst); 101 102 /* Functions for getting new message data */ 103 __owur int tls_get_message_header(SSL *s, int *mt); 104 __owur int tls_get_message_body(SSL *s, size_t *len); 105 __owur int dtls_get_message(SSL *s, int *mt); 106 __owur int dtls_get_message_body(SSL *s, size_t *len); 107 108 /* Message construction and processing functions */ 109 __owur int tls_process_initial_server_flight(SSL *s); 110 __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt); 111 __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt); 112 __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt); 113 __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt); 114 115 __owur int tls_construct_finished(SSL *s, WPACKET *pkt); 116 __owur int tls_construct_key_update(SSL *s, WPACKET *pkt); 117 __owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt); 118 __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs, 119 int stop); 120 __owur WORK_STATE dtls_wait_for_dry(SSL *s); 121 122 /* some client-only functions */ 123 __owur int tls_construct_client_hello(SSL *s, WPACKET *pkt); 124 __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt); 125 __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt); 126 __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt); 127 __owur int tls_process_cert_status_body(SSL *s, PACKET *pkt); 128 __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt); 129 __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt); 130 __owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt); 131 __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst); 132 __owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt); 133 __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey); 134 __owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt); 135 __owur int tls_client_key_exchange_post_work(SSL *s); 136 __owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt); 137 __owur int tls_construct_cert_status(SSL *s, WPACKET *pkt); 138 __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt); 139 __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt); 140 __owur WORK_STATE tls_post_process_server_certificate(SSL *s, WORK_STATE wst); 141 __owur int ssl3_check_cert_and_algorithm(SSL *s); 142 #ifndef OPENSSL_NO_NEXTPROTONEG 143 __owur int tls_construct_next_proto(SSL *s, WPACKET *pkt); 144 #endif 145 __owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt); 146 __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt); 147 __owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt); 148 149 /* some server-only functions */ 150 __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt); 151 __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst); 152 __owur int tls_construct_server_hello(SSL *s, WPACKET *pkt); 153 __owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt); 154 __owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt); 155 __owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt); 156 __owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt); 157 __owur int tls_construct_server_done(SSL *s, WPACKET *pkt); 158 __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt); 159 __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt); 160 __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst); 161 __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt); 162 #ifndef OPENSSL_NO_NEXTPROTONEG 163 __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt); 164 #endif 165 __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt); 166 MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt); 167 168 #ifndef OPENSSL_NO_GOST 169 /* These functions are used in GOST18 CKE, both for client and server */ 170 int ossl_gost18_cke_cipher_nid(const SSL *s); 171 int ossl_gost_ukm(const SSL *s, unsigned char *dgst_buf); 172 #endif 173 174 /* Extension processing */ 175 176 typedef enum ext_return_en { 177 EXT_RETURN_FAIL, 178 EXT_RETURN_SENT, 179 EXT_RETURN_NOT_SENT 180 } EXT_RETURN; 181 182 __owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx, 183 RAW_EXTENSION *exts); 184 __owur int extension_is_relevant(SSL *s, unsigned int extctx, 185 unsigned int thisctx); 186 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context, 187 RAW_EXTENSION **res, size_t *len, int init); 188 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context, 189 RAW_EXTENSION *exts, X509 *x, size_t chainidx); 190 __owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts, 191 X509 *x, size_t chainidx, int fin); 192 __owur int should_add_extension(SSL *s, unsigned int extctx, 193 unsigned int thisctx, int max_version); 194 __owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context, 195 X509 *x, size_t chainidx); 196 197 __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md, 198 const unsigned char *msgstart, 199 size_t binderoffset, const unsigned char *binderin, 200 unsigned char *binderout, 201 SSL_SESSION *sess, int sign, int external); 202 203 /* Server Extension processing */ 204 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context, 205 X509 *x, size_t chainidx); 206 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context, 207 X509 *x, size_t chainidx); 208 int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, 209 X509 *x, size_t chainidx); 210 #ifndef OPENSSL_NO_SRP 211 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 212 size_t chainidx); 213 #endif 214 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context, 215 X509 *x, size_t chainidx); 216 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, 217 X509 *x, size_t chainidx); 218 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context, 219 X509 *x, size_t chainidxl); 220 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context, 221 X509 *x, size_t chainidx); 222 int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context, 223 X509 *x, size_t chainidx); 224 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 225 size_t chainidx); 226 #ifndef OPENSSL_NO_OCSP 227 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context, 228 X509 *x, size_t chainidx); 229 #endif 230 #ifndef OPENSSL_NO_NEXTPROTONEG 231 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 232 size_t chainidx); 233 #endif 234 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 235 size_t chainidx); 236 #ifndef OPENSSL_NO_SRTP 237 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 238 size_t chainidx); 239 #endif 240 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 241 size_t chainidx); 242 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 243 size_t chainidx); 244 int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 245 size_t chainidx); 246 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 247 size_t chainidx); 248 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context, 249 X509 *x, size_t chainidx); 250 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 251 size_t chainidx); 252 int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context, 253 X509 *x, size_t chainidx); 254 255 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, 256 unsigned int context, X509 *x, 257 size_t chainidx); 258 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, 259 unsigned int context, X509 *x, 260 size_t chainidx); 261 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, 262 unsigned int context, X509 *x, 263 size_t chainidx); 264 EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt, 265 unsigned int context, X509 *x, 266 size_t chainidx); 267 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, 268 unsigned int context, X509 *x, 269 size_t chainidx); 270 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, 271 unsigned int context, X509 *x, 272 size_t chainidx); 273 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, 274 unsigned int context, X509 *x, 275 size_t chainidx); 276 #ifndef OPENSSL_NO_OCSP 277 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, 278 unsigned int context, X509 *x, 279 size_t chainidx); 280 #endif 281 #ifndef OPENSSL_NO_NEXTPROTONEG 282 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, 283 unsigned int context, X509 *x, 284 size_t chainidx); 285 #endif 286 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, 287 X509 *x, size_t chainidx); 288 #ifndef OPENSSL_NO_SRTP 289 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context, 290 X509 *x, size_t chainidx); 291 #endif 292 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, 293 X509 *x, size_t chainidx); 294 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, 295 X509 *x, size_t chainidx); 296 EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt, 297 unsigned int context, X509 *x, 298 size_t chainidx); 299 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, 300 unsigned int context, X509 *x, 301 size_t chainidx); 302 EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context, 303 X509 *x, size_t chainidx); 304 /* 305 * Not in public headers as this is not an official extension. Only used when 306 * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set. 307 */ 308 #define TLSEXT_TYPE_cryptopro_bug 0xfde8 309 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, 310 unsigned int context, X509 *x, 311 size_t chainidx); 312 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, 313 X509 *x, size_t chainidx); 314 315 /* Client Extension processing */ 316 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context, 317 X509 *x, size_t chainidx); 318 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context, 319 X509 *x, size_t chainidx); 320 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context, 321 X509 *x, size_t chainidx); 322 #ifndef OPENSSL_NO_SRP 323 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, 324 size_t chainidx); 325 #endif 326 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, 327 unsigned int context, X509 *x, 328 size_t chainidx); 329 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, 330 unsigned int context, X509 *x, 331 size_t chainidx); 332 333 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, 334 unsigned int context, X509 *x, 335 size_t chainidx); 336 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, 337 unsigned int context, X509 *x, 338 size_t chainidx); 339 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, 340 unsigned int context, X509 *x, 341 size_t chainidx); 342 #ifndef OPENSSL_NO_OCSP 343 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, 344 unsigned int context, X509 *x, 345 size_t chainidx); 346 #endif 347 #ifndef OPENSSL_NO_NEXTPROTONEG 348 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, 349 X509 *x, size_t chainidx); 350 #endif 351 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, 352 X509 *x, size_t chainidx); 353 #ifndef OPENSSL_NO_SRTP 354 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context, 355 X509 *x, size_t chainidx); 356 #endif 357 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, 358 X509 *x, size_t chainidx); 359 #ifndef OPENSSL_NO_CT 360 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, 361 X509 *x, size_t chainidx); 362 #endif 363 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, 364 X509 *x, size_t chainidx); 365 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, 366 unsigned int context, X509 *x, 367 size_t chainidx); 368 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, 369 unsigned int context, X509 *x, 370 size_t chainidx); 371 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, 372 unsigned int context, X509 *x, 373 size_t chainidx); 374 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, 375 X509 *x, size_t chainidx); 376 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, 377 unsigned int context, X509 *x, 378 size_t chainidx); 379 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, 380 X509 *x, size_t chainidx); 381 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context, 382 X509 *x, size_t chainidx); 383 384 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, 385 X509 *x, size_t chainidx); 386 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, 387 X509 *x, size_t chainidx); 388 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, 389 X509 *x, size_t chainidx); 390 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, 391 X509 *x, size_t chainidx); 392 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, 393 X509 *x, size_t chainidx); 394 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, 395 X509 *x, size_t chainidx); 396 #ifndef OPENSSL_NO_OCSP 397 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, 398 X509 *x, size_t chainidx); 399 #endif 400 #ifndef OPENSSL_NO_CT 401 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 402 size_t chainidx); 403 #endif 404 #ifndef OPENSSL_NO_NEXTPROTONEG 405 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 406 size_t chainidx); 407 #endif 408 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 409 size_t chainidx); 410 #ifndef OPENSSL_NO_SRTP 411 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 412 size_t chainidx); 413 #endif 414 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 415 size_t chainidx); 416 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 417 size_t chainidx); 418 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context, 419 X509 *x, size_t chainidx); 420 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 421 size_t chainidx); 422 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 423 size_t chainidx); 424 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, 425 size_t chainidx); 426 427 int tls_handle_alpn(SSL *s); 428 429 int tls13_save_handshake_digest_for_pha(SSL *s); 430 int tls13_restore_handshake_digest_for_pha(SSL *s); 431