111 lines
3.0 KiB
Plaintext
111 lines
3.0 KiB
Plaintext
|
=pod
|
||
|
|
||
|
=head1 NAME
|
||
|
|
||
|
SSL_in_before,
|
||
|
SSL_in_init,
|
||
|
SSL_is_init_finished,
|
||
|
SSL_in_connect_init,
|
||
|
SSL_in_accept_init,
|
||
|
SSL_get_state
|
||
|
- retrieve information about the handshake state machine
|
||
|
|
||
|
=head1 SYNOPSIS
|
||
|
|
||
|
#include <openssl/ssl.h>
|
||
|
|
||
|
int SSL_in_init(const SSL *s);
|
||
|
int SSL_in_before(const SSL *s);
|
||
|
int SSL_is_init_finished(const SSL *s);
|
||
|
|
||
|
int SSL_in_connect_init(SSL *s);
|
||
|
int SSL_in_accept_init(SSL *s);
|
||
|
|
||
|
OSSL_HANDSHAKE_STATE SSL_get_state(const SSL *ssl);
|
||
|
|
||
|
=head1 DESCRIPTION
|
||
|
|
||
|
SSL_in_init() returns 1 if the SSL/TLS state machine is currently processing or
|
||
|
awaiting handshake messages, or 0 otherwise.
|
||
|
|
||
|
SSL_in_before() returns 1 if no SSL/TLS handshake has yet been initiated, or 0
|
||
|
otherwise.
|
||
|
|
||
|
SSL_is_init_finished() returns 1 if the SSL/TLS connection is in a state where
|
||
|
fully protected application data can be transferred or 0 otherwise.
|
||
|
|
||
|
Note that in some circumstances (such as when early data is being transferred)
|
||
|
SSL_in_init(), SSL_in_before() and SSL_is_init_finished() can all return 0.
|
||
|
|
||
|
SSL_in_connect_init() returns 1 if B<s> is acting as a client and SSL_in_init()
|
||
|
would return 1, or 0 otherwise.
|
||
|
|
||
|
SSL_in_accept_init() returns 1 if B<s> is acting as a server and SSL_in_init()
|
||
|
would return 1, or 0 otherwise.
|
||
|
|
||
|
SSL_in_connect_init() and SSL_in_accept_init() are implemented as macros.
|
||
|
|
||
|
SSL_get_state() returns a value indicating the current state of the handshake
|
||
|
state machine. OSSL_HANDSHAKE_STATE is an enumerated type where each value
|
||
|
indicates a discrete state machine state. Note that future versions of OpenSSL
|
||
|
may define more states so applications should expect to receive unrecognised
|
||
|
state values. The naming format is made up of a number of elements as follows:
|
||
|
|
||
|
B<protocol>_ST_B<role>_B<message>
|
||
|
|
||
|
B<protocol> is one of TLS or DTLS. DTLS is used where a state is specific to the
|
||
|
DTLS protocol. Otherwise TLS is used.
|
||
|
|
||
|
B<role> is one of CR, CW, SR or SW to indicate "client reading",
|
||
|
"client writing", "server reading" or "server writing" respectively.
|
||
|
|
||
|
B<message> is the name of a handshake message that is being or has been sent, or
|
||
|
is being or has been processed.
|
||
|
|
||
|
Additionally there are some special states that do not conform to the above
|
||
|
format. These are:
|
||
|
|
||
|
=over 4
|
||
|
|
||
|
=item TLS_ST_BEFORE
|
||
|
|
||
|
No handshake messages have yet been been sent or received.
|
||
|
|
||
|
=item TLS_ST_OK
|
||
|
|
||
|
Handshake message sending/processing has completed.
|
||
|
|
||
|
=item TLS_ST_EARLY_DATA
|
||
|
|
||
|
Early data is being processed
|
||
|
|
||
|
=item TLS_ST_PENDING_EARLY_DATA_END
|
||
|
|
||
|
Awaiting the end of early data processing
|
||
|
|
||
|
=back
|
||
|
|
||
|
=head1 RETURN VALUES
|
||
|
|
||
|
SSL_in_init(), SSL_in_before(), SSL_is_init_finished(), SSL_in_connect_init()
|
||
|
and SSL_in_accept_init() return values as indicated above.
|
||
|
|
||
|
SSL_get_state() returns the current handshake state.
|
||
|
|
||
|
|
||
|
=head1 SEE ALSO
|
||
|
|
||
|
L<ssl(7)>,
|
||
|
L<SSL_read_early_data(3)>
|
||
|
|
||
|
=head1 COPYRIGHT
|
||
|
|
||
|
Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
|
||
|
Licensed under the OpenSSL license (the "License"). You may not use
|
||
|
this file except in compliance with the License. You can obtain a copy
|
||
|
in the file LICENSE in the source distribution or at
|
||
|
L<https://www.openssl.org/source/license.html>.
|
||
|
|
||
|
=cut
|