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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) 2002-2018 OpenVPN Inc <sales@openvpn.net>
* Copyright (C) 2010-2018 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 mbed TLS Backend
*/
#ifndef SSL_MBEDTLS_H_
#define SSL_MBEDTLS_H_
#include "syshead.h"
#include <mbedtls/ssl.h>
#include <mbedtls/x509_crt.h>
#if defined(ENABLE_PKCS11)
#include <mbedtls/pkcs11.h>
#endif
typedef struct _buffer_entry buffer_entry;
struct _buffer_entry {
size_t length;
uint8_t *data;
buffer_entry *next_block;
};
typedef struct {
size_t data_start;
buffer_entry *first_block;
buffer_entry *last_block;
} endless_buffer;
typedef struct {
endless_buffer in;
endless_buffer out;
} bio_ctx;
/**
* Structure that wraps the TLS context. Contents differ depending on the
* SSL library used.
*
* Either \c priv_key_pkcs11 or \c priv_key must be filled in.
*/
struct tls_root_ctx {
bool initialised; /**< True if the context has been initialised */
int endpoint; /**< Whether or not this is a server or a client */
mbedtls_dhm_context *dhm_ctx; /**< Diffie-Helmann-Merkle context */
mbedtls_x509_crt *crt_chain; /**< Local Certificate chain */
mbedtls_x509_crt *ca_chain; /**< CA chain for remote verification */
mbedtls_pk_context *priv_key; /**< Local private key */
mbedtls_x509_crl *crl; /**< Certificate Revocation List */
time_t crl_last_mtime; /**< CRL last modification time */
off_t crl_last_size; /**< size of last loaded CRL */
#if defined(ENABLE_PKCS11)
mbedtls_pkcs11_context *priv_key_pkcs11; /**< PKCS11 private key */
#endif
#ifdef MANAGMENT_EXTERNAL_KEY
struct external_context *external_key; /**< Management external key */
#endif
int *allowed_ciphers; /**< List of allowed ciphers for this connection */
mbedtls_x509_crt_profile cert_profile; /**< Allowed certificate types */
};
struct key_state_ssl {
mbedtls_ssl_config *ssl_config; /**< mbedTLS global ssl config */
mbedtls_ssl_context *ctx; /**< mbedTLS connection context */
bio_ctx *bio_ctx;
};
#endif /* SSL_MBEDTLS_H_ */
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