| // Copyright (c) 2012 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_NULL_DECRYPTER_H_ |
| #define QUICHE_QUIC_CORE_CRYPTO_NULL_DECRYPTER_H_ |
| |
| #include <cstddef> |
| #include <cstdint> |
| |
| #include "absl/numeric/int128.h" |
| #include "absl/strings/string_view.h" |
| #include "quiche/quic/core/crypto/quic_decrypter.h" |
| #include "quiche/quic/core/quic_types.h" |
| #include "quiche/quic/platform/api/quic_export.h" |
| |
| namespace quic { |
| |
| class QuicDataReader; |
| |
| // A NullDecrypter is a QuicDecrypter used before a crypto negotiation |
| // has occurred. It does not actually decrypt the payload, but does |
| // verify a hash (fnv128) over both the payload and associated data. |
| class QUIC_EXPORT_PRIVATE NullDecrypter : public QuicDecrypter { |
| public: |
| explicit NullDecrypter(Perspective perspective); |
| NullDecrypter(const NullDecrypter&) = delete; |
| NullDecrypter& operator=(const NullDecrypter&) = delete; |
| ~NullDecrypter() override {} |
| |
| // QuicDecrypter implementation |
| bool SetKey(absl::string_view key) override; |
| bool SetNoncePrefix(absl::string_view nonce_prefix) override; |
| bool SetIV(absl::string_view iv) override; |
| bool SetHeaderProtectionKey(absl::string_view key) override; |
| bool SetPreliminaryKey(absl::string_view key) override; |
| bool SetDiversificationNonce(const DiversificationNonce& nonce) override; |
| bool DecryptPacket(uint64_t packet_number, absl::string_view associated_data, |
| absl::string_view ciphertext, char* output, |
| size_t* output_length, size_t max_output_length) override; |
| std::string GenerateHeaderProtectionMask( |
| QuicDataReader* sample_reader) override; |
| size_t GetKeySize() const override; |
| size_t GetNoncePrefixSize() const override; |
| size_t GetIVSize() const override; |
| absl::string_view GetKey() const override; |
| absl::string_view GetNoncePrefix() const override; |
| |
| uint32_t cipher_id() const override; |
| QuicPacketCount GetIntegrityLimit() const override; |
| |
| private: |
| bool ReadHash(QuicDataReader* reader, absl::uint128* hash); |
| absl::uint128 ComputeHash(absl::string_view data1, |
| absl::string_view data2) const; |
| |
| Perspective perspective_; |
| }; |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_CRYPTO_NULL_DECRYPTER_H_ |