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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single TCP/UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2017 OpenVPN Technologies, Inc. <sales@openvpn.net>
* Copyright (C) 2010-2017 Fox Crypto B.V. <openvpn@fox-it.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/**
* @file Control Channel OpenSSL Backend
*/
#ifndef SSL_OPENSSL_H_
#define SSL_OPENSSL_H_
#include <openssl/ssl.h>
/**
* SSL_OP_NO_TICKET tells OpenSSL to disable "stateless session resumption",
* as this is something we do not want nor need, but could potentially be
* used for a future attack. For compatibility reasons we keep building if the
* OpenSSL version is too old (pre-0.9.8f) to support stateless session
* resumption (and the accompanying SSL_OP_NO_TICKET flag).
*/
#ifndef SSL_OP_NO_TICKET
#define SSL_OP_NO_TICKET 0
#endif
/**
* Structure that wraps the TLS context. Contents differ depending on the
* SSL library used.
*/
struct tls_root_ctx {
SSL_CTX *ctx;
time_t crl_last_mtime;
off_t crl_last_size;
};
struct key_state_ssl {
SSL *ssl; /* SSL object -- new obj created for each new key */
BIO *ssl_bio; /* read/write plaintext from here */
BIO *ct_in; /* write ciphertext to here */
BIO *ct_out; /* read ciphertext from here */
};
/**
* Allocate space in SSL objects in which to store a struct tls_session
* pointer back to parent.
*/
extern int mydata_index; /* GLOBAL */
void openssl_set_mydata_index(void);
#endif /* SSL_OPENSSL_H_ */
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