ssl_util.h

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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) 2002-2026 OpenVPN Inc <sales@openvpn.net>
 *
 *  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, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef SSL_UTIL_H_
#define SSL_UTIL_H_
 
#include "buffer.h"
 
unsigned int
peer_info_extract_int(const char *peer_info, const char *field, const char *format, unsigned int default_value);
 
unsigned int
peer_info_extract_uint(const char *peer_info, const char *field);
 
char *extract_var_peer_info(const char *peer_info, const char *var, struct gc_arena *gc);
 
static inline unsigned int
extract_iv_proto(const char *peer_info)
{
    return peer_info_extract_uint(peer_info, "IV_PROTO=");
}
 
uint32_t extract_asymmetric_peer_id(const char *peer_info);
 
const char *options_string_compat_lzo(const char *options, struct gc_arena *gc);
 
typedef struct
{
    const char *openssl_name;
    const char *iana_name;
} tls_cipher_name_pair;
const tls_cipher_name_pair *tls_get_cipher_name_pair(const char *cipher_name, size_t len);
 
int get_num_elements(const char *string, char delimiter);
 
#endif /* ifndef SSL_UTIL_H_ */