85 lines
2.5 KiB
Plaintext
85 lines
2.5 KiB
Plaintext
|
=pod
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
SSL_clear - reset SSL object to allow another connection
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
#include <openssl/ssl.h>
|
||
|
|
|
||
|
|
int SSL_clear(SSL *ssl);
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
Reset B<ssl> to allow another connection. All settings (method, ciphers,
|
||
|
|
BIOs) are kept.
|
||
|
|
|
||
|
|
=head1 NOTES
|
||
|
|
|
||
|
|
SSL_clear is used to prepare an SSL object for a new connection. While all
|
||
|
|
settings are kept, a side effect is the handling of the current SSL session.
|
||
|
|
If a session is still B<open>, it is considered bad and will be removed
|
||
|
|
from the session cache, as required by RFC2246. A session is considered open,
|
||
|
|
if L<SSL_shutdown(3)> was not called for the connection
|
||
|
|
or at least L<SSL_set_shutdown(3)> was used to
|
||
|
|
set the SSL_SENT_SHUTDOWN state.
|
||
|
|
|
||
|
|
If a session was closed cleanly, the session object will be kept and all
|
||
|
|
settings corresponding. This explicitly means, that e.g. the special method
|
||
|
|
used during the session will be kept for the next handshake. So if the
|
||
|
|
session was a TLSv1 session, a SSL client object will use a TLSv1 client
|
||
|
|
method for the next handshake and a SSL server object will use a TLSv1
|
||
|
|
server method, even if TLS_*_methods were chosen on startup. This
|
||
|
|
will might lead to connection failures (see L<SSL_new(3)>)
|
||
|
|
for a description of the method's properties.
|
||
|
|
|
||
|
|
=head1 WARNINGS
|
||
|
|
|
||
|
|
SSL_clear() resets the SSL object to allow for another connection. The
|
||
|
|
reset operation however keeps several settings of the last sessions
|
||
|
|
(some of these settings were made automatically during the last
|
||
|
|
handshake). It only makes sense for a new connection with the exact
|
||
|
|
same peer that shares these settings, and may fail if that peer
|
||
|
|
changes its settings between connections. Use the sequence
|
||
|
|
L<SSL_get_session(3)>;
|
||
|
|
L<SSL_new(3)>;
|
||
|
|
L<SSL_set_session(3)>;
|
||
|
|
L<SSL_free(3)>
|
||
|
|
instead to avoid such failures
|
||
|
|
(or simply L<SSL_free(3)>; L<SSL_new(3)>
|
||
|
|
if session reuse is not desired).
|
||
|
|
|
||
|
|
=head1 RETURN VALUES
|
||
|
|
|
||
|
|
The following return values can occur:
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item Z<>0
|
||
|
|
|
||
|
|
The SSL_clear() operation could not be performed. Check the error stack to
|
||
|
|
find out the reason.
|
||
|
|
|
||
|
|
=item Z<>1
|
||
|
|
|
||
|
|
The SSL_clear() operation was successful.
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
L<SSL_new(3)>, L<SSL_free(3)>,
|
||
|
|
L<SSL_shutdown(3)>, L<SSL_set_shutdown(3)>,
|
||
|
|
L<SSL_CTX_set_options(3)>, L<ssl(7)>,
|
||
|
|
L<SSL_CTX_set_client_cert_cb(3)>
|
||
|
|
|
||
|
|
=head1 COPYRIGHT
|
||
|
|
|
||
|
|
Copyright 2000-2016 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
|