mirror of
https://github.com/OpenVPN/openvpn3.git
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73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2016 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// Select appropriate OpenVPN protocol data channel implementation
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#ifndef OPENVPN_CRYPTO_CRYPTODCSEL_H
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#define OPENVPN_CRYPTO_CRYPTODCSEL_H
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#include <openvpn/common/exception.hpp>
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#include <openvpn/crypto/cryptodc.hpp>
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#include <openvpn/crypto/crypto_chm.hpp>
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#include <openvpn/crypto/crypto_aead.hpp>
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#include <openvpn/random/randapi.hpp>
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namespace openvpn {
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OPENVPN_EXCEPTION(crypto_dc_select);
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template <typename CRYPTO_API>
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class CryptoDCSelect : public CryptoDCFactory
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{
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public:
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typedef RCPtr<CryptoDCSelect> Ptr;
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CryptoDCSelect(const Frame::Ptr& frame_arg,
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const SessionStats::Ptr& stats_arg,
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const RandomAPI::Ptr& prng_arg)
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: frame(frame_arg),
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stats(stats_arg),
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prng(prng_arg)
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{
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}
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virtual CryptoDCContext::Ptr new_obj(const CryptoAlgs::Type cipher,
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const CryptoAlgs::Type digest)
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{
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const CryptoAlgs::Alg& alg = CryptoAlgs::get(cipher);
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if (alg.flags() & CryptoAlgs::CBC_HMAC)
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return new CryptoContextCHM<CRYPTO_API>(cipher, digest, frame, stats, prng);
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else if (alg.flags() & CryptoAlgs::AEAD)
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return new AEAD::CryptoContext<CRYPTO_API>(cipher, frame, stats);
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else
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OPENVPN_THROW(crypto_dc_select, alg.name() << ": only CBC/HMAC and AEAD cipher modes supported");
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}
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private:
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Frame::Ptr frame;
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SessionStats::Ptr stats;
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RandomAPI::Ptr prng;
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};
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}
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#endif
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