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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef NET_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ | 5 #ifndef NET_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ |
| 6 #define NET_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ | 6 #define NET_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ |
| 7 | 7 |
| 8 #include <stddef.h> | 8 #include <stddef.h> |
| 9 #include <stdint.h> | 9 #include <stdint.h> |
| 10 | 10 |
| 11 #include "base/macros.h" | 11 #include "base/macros.h" |
| 12 #include "net/base/net_export.h" | |
| 13 #include "net/quic/core/crypto/aead_base_decrypter.h" | 12 #include "net/quic/core/crypto/aead_base_decrypter.h" |
| 13 #include "net/quic/platform/api/quic_export.h" |
| 14 | 14 |
| 15 namespace net { | 15 namespace net { |
| 16 | 16 |
| 17 // A ChaCha20Poly1305Decrypter is a QuicDecrypter that implements the | 17 // A ChaCha20Poly1305Decrypter is a QuicDecrypter that implements the |
| 18 // AEAD_CHACHA20_POLY1305 algorithm specified in | 18 // AEAD_CHACHA20_POLY1305 algorithm specified in |
| 19 // draft-agl-tls-chacha20poly1305-04, except that it truncates the Poly1305 | 19 // draft-agl-tls-chacha20poly1305-04, except that it truncates the Poly1305 |
| 20 // authenticator to 12 bytes. Create an instance by calling | 20 // authenticator to 12 bytes. Create an instance by calling |
| 21 // QuicDecrypter::Create(kCC12). | 21 // QuicDecrypter::Create(kCC12). |
| 22 // | 22 // |
| 23 // It uses an authentication tag of 16 bytes (128 bits). There is no | 23 // It uses an authentication tag of 16 bytes (128 bits). There is no |
| 24 // fixed nonce prefix. | 24 // fixed nonce prefix. |
| 25 class NET_EXPORT_PRIVATE ChaCha20Poly1305Decrypter : public AeadBaseDecrypter { | 25 class QUIC_EXPORT_PRIVATE ChaCha20Poly1305Decrypter : public AeadBaseDecrypter { |
| 26 public: | 26 public: |
| 27 enum { | 27 enum { |
| 28 kAuthTagSize = 12, | 28 kAuthTagSize = 12, |
| 29 }; | 29 }; |
| 30 | 30 |
| 31 ChaCha20Poly1305Decrypter(); | 31 ChaCha20Poly1305Decrypter(); |
| 32 ~ChaCha20Poly1305Decrypter() override; | 32 ~ChaCha20Poly1305Decrypter() override; |
| 33 | 33 |
| 34 const char* cipher_name() const override; | 34 const char* cipher_name() const override; |
| 35 uint32_t cipher_id() const override; | 35 uint32_t cipher_id() const override; |
| 36 | 36 |
| 37 private: | 37 private: |
| 38 DISALLOW_COPY_AND_ASSIGN(ChaCha20Poly1305Decrypter); | 38 DISALLOW_COPY_AND_ASSIGN(ChaCha20Poly1305Decrypter); |
| 39 }; | 39 }; |
| 40 | 40 |
| 41 } // namespace net | 41 } // namespace net |
| 42 | 42 |
| 43 #endif // NET_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ | 43 #endif // NET_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ |
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