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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_
#define NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/strings/string_piece.h"
#include "net/base/net_export.h"
#include "net/quic/crypto/key_exchange.h"
namespace net {
class QuicRandom;
// Curve25519KeyExchange implements a KeyExchange using elliptic-curve
// Diffie-Hellman on curve25519. See http://cr.yp.to/ecdh.html
class NET_EXPORT_PRIVATE Curve25519KeyExchange : public KeyExchange {
public:
virtual ~Curve25519KeyExchange();
// New creates a new object from a private key. If the private key is
// invalid, nullptr is returned.
static Curve25519KeyExchange* New(const base::StringPiece& private_key);
// NewPrivateKey returns a private key, generated from |rand|, suitable for
// passing to |New|.
static std::string NewPrivateKey(QuicRandom* rand);
// KeyExchange interface.
virtual KeyExchange* NewKeyPair(QuicRandom* rand) const override;
virtual bool CalculateSharedKey(const base::StringPiece& peer_public_value,
std::string* shared_key) const override;
virtual base::StringPiece public_value() const override;
virtual QuicTag tag() const override;
private:
Curve25519KeyExchange();
uint8 private_key_[32];
uint8 public_key_[32];
};
} // namespace net
#endif // NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_
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