/* ssl/statem/statem_locl.h */ /* ==================================================================== * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /***************************************************************************** * * * The following definitions are PRIVATE to the state machine. They should * * NOT be used outside of the state machine. * * * *****************************************************************************/ /* Max message length definitions */ /* The spec allows for a longer length than this, but we limit it */ #define HELLO_VERIFY_REQUEST_MAX_LENGTH 258 #define SERVER_HELLO_MAX_LENGTH 20000 #define SERVER_KEY_EXCH_MAX_LENGTH 102400 #define SERVER_HELLO_DONE_MAX_LENGTH 0 #define CCS_MAX_LENGTH 1 /* Max should actually be 36 but we are generous */ #define FINISHED_MAX_LENGTH 64 /* Message processing return codes */ typedef enum { /* Something bad happened */ MSG_PROCESS_ERROR, /* We've finished reading - swap to writing */ MSG_PROCESS_FINISHED_READING, /* * We've completed the main processing of this message but there is some * post processing to be done. */ MSG_PROCESS_CONTINUE_PROCESSING, /* We've finished this message - read the next message */ MSG_PROCESS_CONTINUE_READING } MSG_PROCESS_RETURN; /* Flush the write BIO */ int statem_flush(SSL *s); /* * TLS/DTLS client state machine functions */ int ossl_statem_client_read_transition(SSL *s, int mt); WRITE_TRAN ossl_statem_client_write_transition(SSL *s); WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst); WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst); int ossl_statem_client_construct_message(SSL *s); unsigned long ossl_statem_client_max_message_size(SSL *s); MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt); WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst); /* * TLS/DTLS server state machine functions */ int ossl_statem_server_read_transition(SSL *s, int mt); WRITE_TRAN ossl_statem_server_write_transition(SSL *s); WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst); WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst); int ossl_statem_server_construct_message(SSL *s); unsigned long ossl_statem_server_max_message_size(SSL *s); MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt); WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst); /* Functions for getting new message data */ __owur int tls_get_message_header(SSL *s, int *mt); __owur int tls_get_message_body(SSL *s, unsigned long *len); __owur int dtls_get_message(SSL *s, int *mt, unsigned long *len); /* Message construction and processing functions */ __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt); __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt); __owur int tls_construct_change_cipher_spec(SSL *s); __owur int dtls_construct_change_cipher_spec(SSL *s); __owur int tls_construct_finished(SSL *s, const char *sender, int slen); __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst); __owur WORK_STATE dtls_wait_for_dry(SSL *s); /* some client-only functions */ __owur int tls_construct_client_hello(SSL *s); __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt); __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt); __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt); __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt); __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt); __owur int tls_construct_client_verify(SSL *s); __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst); __owur int tls_construct_client_certificate(SSL *s); __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey); __owur int tls_construct_client_key_exchange(SSL *s); __owur int tls_client_key_exchange_post_work(SSL *s); __owur int tls_construct_cert_status(SSL *s); __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt); __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt); __owur int ssl3_check_cert_and_algorithm(SSL *s); # ifndef OPENSSL_NO_NEXTPROTONEG __owur int tls_construct_next_proto(SSL *s); # endif __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt); /* some server-only functions */ __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt); __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst); __owur int tls_construct_server_hello(SSL *s); __owur int tls_construct_hello_request(SSL *s); __owur int dtls_construct_hello_verify_request(SSL *s); __owur int tls_construct_server_certificate(SSL *s); __owur int tls_construct_server_key_exchange(SSL *s); __owur int tls_construct_certificate_request(SSL *s); __owur int tls_construct_server_done(SSL *s); __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt); __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt); __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst); __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt); # ifndef OPENSSL_NO_NEXTPROTONEG __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt); # endif __owur int tls_construct_new_session_ticket(SSL *s);