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420 lines
22 KiB
C
420 lines
22 KiB
C
/*
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* Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*****************************************************************************
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* *
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* The following definitions are PRIVATE to the state machine. They should *
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* NOT be used outside of the state machine. *
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* *
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*****************************************************************************/
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/* Max message length definitions */
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/* The spec allows for a longer length than this, but we limit it */
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#define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
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#define END_OF_EARLY_DATA_MAX_LENGTH 0
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#define SERVER_HELLO_MAX_LENGTH 20000
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#define HELLO_RETRY_REQUEST_MAX_LENGTH 20000
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#define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000
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#define SERVER_KEY_EXCH_MAX_LENGTH 102400
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#define SERVER_HELLO_DONE_MAX_LENGTH 0
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#define KEY_UPDATE_MAX_LENGTH 1
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#define CCS_MAX_LENGTH 1
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/* Max should actually be 36 but we are generous */
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#define FINISHED_MAX_LENGTH 64
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/* Dummy message type */
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#define SSL3_MT_DUMMY -1
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extern const unsigned char hrrrandom[];
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/* Message processing return codes */
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typedef enum {
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/* Something bad happened */
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MSG_PROCESS_ERROR,
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/* We've finished reading - swap to writing */
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MSG_PROCESS_FINISHED_READING,
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/*
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* We've completed the main processing of this message but there is some
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* post processing to be done.
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*/
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MSG_PROCESS_CONTINUE_PROCESSING,
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/* We've finished this message - read the next message */
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MSG_PROCESS_CONTINUE_READING
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} MSG_PROCESS_RETURN;
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typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
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int ssl3_take_mac(SSL *s);
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int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
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size_t num_groups, int checkallow);
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int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
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size_t hashlen, const unsigned char *hrr,
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size_t hrrlen);
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int parse_ca_names(SSL *s, PACKET *pkt);
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const STACK_OF(X509_NAME) *get_ca_names(SSL *s);
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int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt);
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size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
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const void *param, size_t paramlen);
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/*
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* TLS/DTLS client state machine functions
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*/
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int ossl_statem_client_read_transition(SSL *s, int mt);
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WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
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WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
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WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
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int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
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confunc_f *confunc, int *mt);
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size_t ossl_statem_client_max_message_size(SSL *s);
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MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
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WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
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/*
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* TLS/DTLS server state machine functions
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*/
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int ossl_statem_server_read_transition(SSL *s, int mt);
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WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
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WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
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WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
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int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
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confunc_f *confunc,int *mt);
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size_t ossl_statem_server_max_message_size(SSL *s);
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MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
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WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
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/* Functions for getting new message data */
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__owur int tls_get_message_header(SSL *s, int *mt);
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__owur int tls_get_message_body(SSL *s, size_t *len);
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__owur int dtls_get_message(SSL *s, int *mt, size_t *len);
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/* Message construction and processing functions */
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__owur int tls_process_initial_server_flight(SSL *s);
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__owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
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__owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
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__owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
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__owur int tls_construct_finished(SSL *s, WPACKET *pkt);
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__owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
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__owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
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int stop);
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__owur WORK_STATE dtls_wait_for_dry(SSL *s);
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/* some client-only functions */
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__owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
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__owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
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__owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
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__owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
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__owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
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__owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
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__owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
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__owur int tls_client_key_exchange_post_work(SSL *s);
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__owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
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__owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
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__owur int ssl3_check_cert_and_algorithm(SSL *s);
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#ifndef OPENSSL_NO_NEXTPROTONEG
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__owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
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#endif
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__owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
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__owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
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/* some server-only functions */
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__owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
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__owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
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__owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
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__owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
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__owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
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__owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
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__owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
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__owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
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__owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
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__owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
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__owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
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#ifndef OPENSSL_NO_NEXTPROTONEG
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__owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
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#endif
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__owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
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MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
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/* Extension processing */
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typedef enum ext_return_en {
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EXT_RETURN_FAIL,
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EXT_RETURN_SENT,
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EXT_RETURN_NOT_SENT
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} EXT_RETURN;
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__owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
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RAW_EXTENSION *exts);
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__owur int extension_is_relevant(SSL *s, unsigned int extctx,
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unsigned int thisctx);
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__owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
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RAW_EXTENSION **res, size_t *len, int init);
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__owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
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RAW_EXTENSION *exts, X509 *x, size_t chainidx);
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__owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
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X509 *x, size_t chainidx, int fin);
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__owur int should_add_extension(SSL *s, unsigned int extctx,
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unsigned int thisctx, int max_version);
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__owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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__owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
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const unsigned char *msgstart,
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size_t binderoffset, const unsigned char *binderin,
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unsigned char *binderout,
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SSL_SESSION *sess, int sign, int external);
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/* Server Extension processing */
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int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#ifndef OPENSSL_NO_SRP
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int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#ifndef OPENSSL_NO_EC
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int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidxl);
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#endif
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int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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#ifndef OPENSSL_NO_OCSP
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int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#endif
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#ifndef OPENSSL_NO_NEXTPROTONEG
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int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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#ifndef OPENSSL_NO_SRTP
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int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#ifndef OPENSSL_NO_EC
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EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#ifndef OPENSSL_NO_OCSP
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EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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#ifndef OPENSSL_NO_NEXTPROTONEG
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EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#ifndef OPENSSL_NO_SRTP
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EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#endif
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EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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/*
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* Not in public headers as this is not an official extension. Only used when
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* SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
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*/
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#define TLSEXT_TYPE_cryptopro_bug 0xfde8
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EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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/* Client Extension processing */
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EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#ifndef OPENSSL_NO_SRP
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EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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#ifndef OPENSSL_NO_EC
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EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#ifndef OPENSSL_NO_OCSP
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EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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#endif
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#ifndef OPENSSL_NO_NEXTPROTONEG
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EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#endif
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EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#ifndef OPENSSL_NO_SRTP
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EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#endif
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EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#ifndef OPENSSL_NO_CT
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EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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#endif
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EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
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X509 *x, size_t chainidx);
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EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
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unsigned int context, X509 *x,
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size_t chainidx);
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EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
|
|
unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
|
|
unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
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|
EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
|
|
unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
|
|
int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
#ifndef OPENSSL_NO_EC
|
|
int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
#endif
|
|
int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
#ifndef OPENSSL_NO_OCSP
|
|
int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
#endif
|
|
#ifndef OPENSSL_NO_CT
|
|
int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
#endif
|
|
#ifndef OPENSSL_NO_NEXTPROTONEG
|
|
int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
#endif
|
|
int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
#ifndef OPENSSL_NO_SRTP
|
|
int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
#endif
|
|
int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
|
|
X509 *x, size_t chainidx);
|
|
int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
|
|
size_t chainidx);
|
|
|
|
int tls_handle_alpn(SSL *s);
|
|
|
|
int tls13_save_handshake_digest_for_pha(SSL *s);
|
|
int tls13_restore_handshake_digest_for_pha(SSL *s);
|