mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 04:02:15 +02:00
3fbe0a2701
Signed-off-by: David Sommerseth <davids@openvpn.net>
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
|
|
// over a single port, with support for SSL/TLS-based
|
|
// session authentication and key exchange,
|
|
// packet encryption, packet authentication, and
|
|
// packet compression.
|
|
//
|
|
// Copyright (C) 2012-2020 OpenVPN Inc.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License Version 3
|
|
// 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 Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program in the COPYING file.
|
|
// If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
// Special data limits on Blowfish, Triple DES, and other 64-bit
|
|
// block-size ciphers vulnerable to "Sweet32" birthday attack
|
|
// (CVE-2016-6329). Limit such cipher keys to no more than 64 MB
|
|
// of data encrypted/decrypted. Note that we trigger early at
|
|
// 48 MB to compensate for possible delays in renegotiation and
|
|
// rollover to the new key.
|
|
|
|
#ifndef OPENVPN_CRYPTO_DATALIMIT_H
|
|
#define OPENVPN_CRYPTO_DATALIMIT_H
|
|
|
|
#include <openvpn/crypto/cryptoalgs.hpp>
|
|
|
|
#ifndef OPENVPN_BS64_DATA_LIMIT
|
|
#define OPENVPN_BS64_DATA_LIMIT 48000000
|
|
#endif
|
|
|
|
namespace openvpn {
|
|
inline bool is_bs64_cipher(const CryptoAlgs::Type cipher)
|
|
{
|
|
return CryptoAlgs::get(cipher).block_size() == 8;
|
|
}
|
|
}
|
|
|
|
#endif
|