| // 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 QUICHE_QUIC_CORE_CRYPTO_CURVE25519_KEY_EXCHANGE_H_ |
| #define QUICHE_QUIC_CORE_CRYPTO_CURVE25519_KEY_EXCHANGE_H_ |
| |
| #include <cstdint> |
| #include <string> |
| |
| #include "absl/strings/string_view.h" |
| #include "quic/core/crypto/key_exchange.h" |
| #include "quic/platform/api/quic_export.h" |
| |
| namespace quic { |
| |
| class QuicRandom; |
| |
| // Curve25519KeyExchange implements a SynchronousKeyExchange using |
| // elliptic-curve Diffie-Hellman on curve25519. See http://cr.yp.to/ecdh.html |
| class QUIC_EXPORT_PRIVATE Curve25519KeyExchange |
| : public SynchronousKeyExchange { |
| public: |
| ~Curve25519KeyExchange() override; |
| |
| // New generates a private key and then creates new key-exchange object. |
| static std::unique_ptr<Curve25519KeyExchange> New(QuicRandom* rand); |
| |
| // New creates a new key-exchange object from a private key. If |private_key| |
| // is invalid, nullptr is returned. |
| static std::unique_ptr<Curve25519KeyExchange> New( |
| absl::string_view private_key); |
| |
| // NewPrivateKey returns a private key, generated from |rand|, suitable for |
| // passing to |New|. |
| static std::string NewPrivateKey(QuicRandom* rand); |
| |
| // SynchronousKeyExchange interface. |
| bool CalculateSharedKeySync(absl::string_view peer_public_value, |
| std::string* shared_key) const override; |
| absl::string_view public_value() const override; |
| QuicTag type() const override { return kC255; } |
| |
| private: |
| Curve25519KeyExchange(); |
| |
| uint8_t private_key_[32]; |
| uint8_t public_key_[32]; |
| }; |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_CRYPTO_CURVE25519_KEY_EXCHANGE_H_ |