1.\" $OpenBSD: SSL_CTX_sessions.3,v 1.5 2018/04/25 14:19:39 schwarze Exp $ 2.\" OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100 3.\" 4.\" This file was written by Lutz Jaenicke <jaenicke@openssl.org>. 5.\" Copyright (c) 2001 The OpenSSL Project. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in 16.\" the documentation and/or other materials provided with the 17.\" distribution. 18.\" 19.\" 3. All advertising materials mentioning features or use of this 20.\" software must display the following acknowledgment: 21.\" "This product includes software developed by the OpenSSL Project 22.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 23.\" 24.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25.\" endorse or promote products derived from this software without 26.\" prior written permission. For written permission, please contact 27.\" openssl-core@openssl.org. 28.\" 29.\" 5. Products derived from this software may not be called "OpenSSL" 30.\" nor may "OpenSSL" appear in their names without prior written 31.\" permission of the OpenSSL Project. 32.\" 33.\" 6. Redistributions of any form whatsoever must retain the following 34.\" acknowledgment: 35.\" "This product includes software developed by the OpenSSL Project 36.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)" 37.\" 38.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49.\" OF THE POSSIBILITY OF SUCH DAMAGE. 50.\" 51.Dd $Mdocdate: April 25 2018 $ 52.Dt SSL_CTX_SESSIONS 3 53.Os 54.Sh NAME 55.Nm SSL_CTX_sessions 56.Nd access internal session cache 57.Sh SYNOPSIS 58.In openssl/ssl.h 59.Ft LHASH_OF(SSL_SESSION) * 60.Fn SSL_CTX_sessions "SSL_CTX *ctx" 61.Sh DESCRIPTION 62.Fn SSL_CTX_sessions 63returns a pointer to the lhash databases containing the internal session cache 64for 65.Fa ctx . 66.Pp 67The sessions in the internal session cache are kept in an 68lhash-type database 69(see 70.Xr lh_new 3 ) . 71It is possible to directly access this database, e.g., for searching. 72In parallel, 73the sessions form a linked list which is maintained separately from the 74lhash operations, 75so that the database must not be modified directly but by using the 76.Xr SSL_CTX_add_session 3 77family of functions. 78.Sh SEE ALSO 79.Xr lh_new 3 , 80.Xr ssl 3 , 81.Xr SSL_CTX_add_session 3 , 82.Xr SSL_CTX_set_session_cache_mode 3 83.Sh HISTORY 84.Fn SSL_CTX_sessions 85first appeared in SSLeay 0.5.2 and has been available since 86.Ox 2.4 . 87