| /* ==================================================================== |
| * 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); |
