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Diffstat (limited to 'ssl/statem/statem.h')
-rw-r--r-- | ssl/statem/statem.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/ssl/statem/statem.h b/ssl/statem/statem.h new file mode 100644 index 0000000000..b6256f9788 --- /dev/null +++ b/ssl/statem/statem.h @@ -0,0 +1,174 @@ +/* ssl/statem/statem.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). + * + */ + +/***************************************************************************** + * * + * These emums should be considered PRIVATE to the state machine. No * + * non-state machine code should need to use these * + * * + *****************************************************************************/ +/* + * Valid return codes used for functions performing work prior to or after + * sending or receiving a message + */ +enum WORK_STATE { + /* Something went wrong */ + WORK_ERROR, + /* We're done working and there shouldn't be anything else to do after */ + WORK_FINISHED_STOP, + /* We're done working move onto the next thing */ + WORK_FINISHED_CONTINUE, + /* We're working on phase A */ + WORK_MORE_A, + /* We're working on phase B */ + WORK_MORE_B +}; + +/* Write transition return codes */ +enum WRITE_TRAN { + /* Something went wrong */ + WRITE_TRAN_ERROR, + /* A transition was successfully completed and we should continue */ + WRITE_TRAN_CONTINUE, + /* There is no more write work to be done */ + WRITE_TRAN_FINISHED +}; + +/* Message processing return codes */ +enum MSG_PROCESS_RETURN { + MSG_PROCESS_ERROR, + MSG_PROCESS_FINISHED_READING, + MSG_PROCESS_CONTINUE_PROCESSING, + MSG_PROCESS_CONTINUE_READING +}; + +/* Message flow states */ +enum MSG_FLOW_STATE { + /* No handshake in progress */ + MSG_FLOW_UNINITED, + /* A permanent error with this connection */ + MSG_FLOW_ERROR, + /* We are about to renegotiate */ + MSG_FLOW_RENEGOTIATE, + /* We are reading messages */ + MSG_FLOW_READING, + /* We are writing messages */ + MSG_FLOW_WRITING, + /* Handshake has finished */ + MSG_FLOW_FINISHED +}; + +/* Read states */ +enum READ_STATE { + READ_STATE_HEADER, + READ_STATE_BODY, + READ_STATE_POST_PROCESS +}; + +/* Write states */ +enum WRITE_STATE { + WRITE_STATE_TRANSITION, + WRITE_STATE_PRE_WORK, + WRITE_STATE_SEND, + WRITE_STATE_POST_WORK +}; + + +/***************************************************************************** + * * + * This structure should be considered "opaque" to anything outside of the * + * state machine. No non-state machine code should be accessing the members * + * of this structure. * + * * + *****************************************************************************/ + +struct statem_st { + enum MSG_FLOW_STATE state; + enum WRITE_STATE write_state; + enum WORK_STATE write_state_work; + enum READ_STATE read_state; + enum WORK_STATE read_state_work; + enum HANDSHAKE_STATE hand_state; + int in_init; + int read_state_first_init; + int use_timer; +#ifndef OPENSSL_NO_SCTP + int in_sctp_read_sock; +#endif +}; +typedef struct statem_st STATEM; + + +/***************************************************************************** + * * + * The following macros/functions represent the libssl internal API to the * + * state machine. Any libssl code may call these functions/macros * + * * + *****************************************************************************/ + +__owur int statem_accept(SSL *s); +__owur int statem_connect(SSL *s); +void statem_clear(SSL *s); +void statem_set_renegotiate(SSL *s); +void statem_set_error(SSL *s); +int statem_in_error(const SSL *s); +void statem_set_in_init(SSL *s, int init); +__owur int statem_app_data_allowed(SSL *s); +#ifndef OPENSSL_NO_SCTP +void statem_set_sctp_read_sock(SSL *s, int read_sock); +__owur int statem_in_sctp_read_sock(SSL *s); +#endif + + |