1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_ 6 #define NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_ 7 8 #include <string> 9 10 #include "base/compiler_specific.h" 11 #include "base/strings/string_piece.h" 12 #include "net/base/net_export.h" 13 #include "net/quic/crypto/key_exchange.h" 14 15 namespace net { 16 17 class QuicRandom; 18 19 // Curve25519KeyExchange implements a KeyExchange using elliptic-curve 20 // Diffie-Hellman on curve25519. See http://cr.yp.to/ecdh.html 21 class NET_EXPORT_PRIVATE Curve25519KeyExchange : public KeyExchange { 22 public: 23 virtual ~Curve25519KeyExchange(); 24 25 // New creates a new object from a private key. If the private key is 26 // invalid, NULL is returned. 27 static Curve25519KeyExchange* New(const base::StringPiece& private_key); 28 29 // NewPrivateKey returns a private key, generated from |rand|, suitable for 30 // passing to |New|. 31 static std::string NewPrivateKey(QuicRandom* rand); 32 33 // KeyExchange interface. 34 virtual KeyExchange* NewKeyPair(QuicRandom* rand) const OVERRIDE; 35 virtual bool CalculateSharedKey(const base::StringPiece& peer_public_value, 36 std::string* shared_key) const OVERRIDE; 37 virtual base::StringPiece public_value() const OVERRIDE; 38 virtual QuicTag tag() const OVERRIDE; 39 40 private: 41 Curve25519KeyExchange(); 42 43 uint8 private_key_[32]; 44 uint8 public_key_[32]; 45 }; 46 47 } // namespace net 48 49 #endif // NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_ 50
