fadd9a1e2d
Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich Salz Reviewed-by: Rich Salz <rsalz@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org>
143 lines
6.7 KiB
C
143 lines
6.7 KiB
C
/*
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* Copyright 2015-2016 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 SERVER_HELLO_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 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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/* Extension context codes */
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#define EXT_DTLS_ONLY 0x01
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#define EXT_CLIENT_HELLO 0x02
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/* Really means TLS1.2 or below */
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#define EXT_TLS1_2_SERVER_HELLO 0x04
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#define EXT_TLS1_3_SERVER_HELLO 0x08
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#define EXT_TLS1_3_ENCRYPTED_EXTENSIONS 0x10
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#define EXT_TLS1_3_HELLO_RETRY_REQUEST 0x20
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#define EXT_TLS1_3_CERTIFICATE 0x40
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#define EXT_TLS1_3_NEW_SESSION_TICKET 0x80
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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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/* Flush the write BIO */
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int statem_flush(SSL *s);
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typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
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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, int *al);
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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 WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst);
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__owur WORK_STATE dtls_wait_for_dry(SSL *s);
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int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
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RAW_EXTENSION **res, size_t *numfound, int *ad);
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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 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_client_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(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 dtls_process_hello_verify(SSL *s, PACKET *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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