846e33c729
Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Kurt Roeckx <kurt@openssl.org>
130 lines
4.4 KiB
C
130 lines
4.4 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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* These enums should be considered PRIVATE to the state machine. No *
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* non-state machine code should need to use these *
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* *
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*****************************************************************************/
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/*
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* Valid return codes used for functions performing work prior to or after
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* sending or receiving a message
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*/
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typedef enum {
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/* Something went wrong */
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WORK_ERROR,
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/* We're done working and there shouldn't be anything else to do after */
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WORK_FINISHED_STOP,
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/* We're done working move onto the next thing */
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WORK_FINISHED_CONTINUE,
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/* We're working on phase A */
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WORK_MORE_A,
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/* We're working on phase B */
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WORK_MORE_B
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} WORK_STATE;
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/* Write transition return codes */
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typedef enum {
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/* Something went wrong */
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WRITE_TRAN_ERROR,
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/* A transition was successfully completed and we should continue */
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WRITE_TRAN_CONTINUE,
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/* There is no more write work to be done */
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WRITE_TRAN_FINISHED
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} WRITE_TRAN;
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/* Message flow states */
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typedef enum {
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/* No handshake in progress */
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MSG_FLOW_UNINITED,
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/* A permanent error with this connection */
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MSG_FLOW_ERROR,
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/* We are about to renegotiate */
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MSG_FLOW_RENEGOTIATE,
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/* We are reading messages */
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MSG_FLOW_READING,
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/* We are writing messages */
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MSG_FLOW_WRITING,
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/* Handshake has finished */
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MSG_FLOW_FINISHED
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} MSG_FLOW_STATE;
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/* Read states */
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typedef enum {
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READ_STATE_HEADER,
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READ_STATE_BODY,
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READ_STATE_POST_PROCESS
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} READ_STATE;
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/* Write states */
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typedef enum {
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WRITE_STATE_TRANSITION,
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WRITE_STATE_PRE_WORK,
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WRITE_STATE_SEND,
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WRITE_STATE_POST_WORK
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} WRITE_STATE;
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/*****************************************************************************
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* *
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* This structure should be considered "opaque" to anything outside of the *
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* state machine. No non-state machine code should be accessing the members *
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* of this structure. *
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* *
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*****************************************************************************/
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struct ossl_statem_st {
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MSG_FLOW_STATE state;
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WRITE_STATE write_state;
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WORK_STATE write_state_work;
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READ_STATE read_state;
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WORK_STATE read_state_work;
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OSSL_HANDSHAKE_STATE hand_state;
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int in_init;
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int read_state_first_init;
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/* true when we are actually in SSL_accept() or SSL_connect() */
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int in_handshake;
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/* Should we skip the CertificateVerify message? */
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unsigned int no_cert_verify;
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int use_timer;
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#ifndef OPENSSL_NO_SCTP
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int in_sctp_read_sock;
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#endif
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};
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typedef struct ossl_statem_st OSSL_STATEM;
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/*****************************************************************************
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* *
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* The following macros/functions represent the libssl internal API to the *
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* state machine. Any libssl code may call these functions/macros *
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* *
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*****************************************************************************/
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__owur int ossl_statem_accept(SSL *s);
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__owur int ossl_statem_connect(SSL *s);
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void ossl_statem_clear(SSL *s);
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void ossl_statem_set_renegotiate(SSL *s);
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void ossl_statem_set_error(SSL *s);
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int ossl_statem_in_error(const SSL *s);
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void ossl_statem_set_in_init(SSL *s, int init);
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int ossl_statem_get_in_handshake(SSL *s);
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void ossl_statem_set_in_handshake(SSL *s, int inhand);
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void ossl_statem_set_hello_verify_done(SSL *s);
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__owur int ossl_statem_app_data_allowed(SSL *s);
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#ifndef OPENSSL_NO_SCTP
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void ossl_statem_set_sctp_read_sock(SSL *s, int read_sock);
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__owur int ossl_statem_in_sctp_read_sock(SSL *s);
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#endif
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