mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
109 lines
2.4 KiB
C++
109 lines
2.4 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) 2012-2020 OpenVPN 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 Affero 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero 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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// A 64-bit session ID, used by ProtoContext.
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#ifndef OPENVPN_SSL_PSID_H
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#define OPENVPN_SSL_PSID_H
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#include <string>
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#include <cstring>
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#include <openvpn/buffer/buffer.hpp>
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#include <openvpn/common/hexstr.hpp>
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#include <openvpn/common/memneq.hpp>
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namespace openvpn {
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class ProtoSessionID
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{
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public:
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enum {
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SIZE=8
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};
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ProtoSessionID()
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{
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reset();
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}
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void reset()
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{
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defined_ = false;
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std::memset(id_, 0, SIZE);
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}
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explicit ProtoSessionID(Buffer& buf)
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{
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buf.read(id_, SIZE);
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defined_ = true;
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}
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template <typename PRNG_TYPE>
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void randomize(PRNG_TYPE& prng)
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{
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prng.assert_crypto();
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prng.rand_bytes(id_, SIZE);
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defined_ = true;
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}
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void read(Buffer& buf)
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{
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buf.read(id_, SIZE);
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defined_ = true;
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}
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void write(Buffer& buf) const
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{
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buf.write(id_, SIZE);
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}
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void prepend(Buffer& buf) const
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{
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buf.prepend(id_, SIZE);
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}
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bool defined() const { return defined_; }
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bool match(const ProtoSessionID& other) const
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{
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return defined_ && other.defined_ && !crypto::memneq(id_, other.id_, SIZE);
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}
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std::string str() const
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{
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return render_hex(id_, SIZE);
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}
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protected:
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ProtoSessionID(const unsigned char *data)
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{
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std::memcpy(id_, data, SIZE);
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}
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private:
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bool defined_;
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unsigned char id_[SIZE];
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};
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} // namespace openvpn
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#endif // OPENVPN_SSL_PSID_H
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