1 /* 2 * Copyright 2015-2019 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 /* 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); 421