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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_CRYPTO_QUIC_ENCRYPTER_H_ | 5 #ifndef NET_QUIC_CRYPTO_QUIC_ENCRYPTER_H_ |
| 6 #define NET_QUIC_CRYPTO_QUIC_ENCRYPTER_H_ | 6 #define NET_QUIC_CRYPTO_QUIC_ENCRYPTER_H_ |
| 7 | 7 |
| 8 #include "net/base/net_export.h" | 8 #include "net/base/net_export.h" |
| 9 #include "net/quic/quic_protocol.h" | 9 #include "net/quic/quic_protocol.h" |
| 10 | 10 |
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| 46 // |GetCiphertextSize(plaintext.size()| bytes long. | 46 // |GetCiphertextSize(plaintext.size()| bytes long. |
| 47 virtual bool Encrypt(base::StringPiece nonce, | 47 virtual bool Encrypt(base::StringPiece nonce, |
| 48 base::StringPiece associated_data, | 48 base::StringPiece associated_data, |
| 49 base::StringPiece plaintext, | 49 base::StringPiece plaintext, |
| 50 unsigned char* output) = 0; | 50 unsigned char* output) = 0; |
| 51 | 51 |
| 52 // Returns a newly created QuicData object containing the encrypted | 52 // Returns a newly created QuicData object containing the encrypted |
| 53 // |plaintext| as well as a MAC over both |plaintext| and |associated_data|, | 53 // |plaintext| as well as a MAC over both |plaintext| and |associated_data|, |
| 54 // or nullptr if there is an error. |sequence_number| is appended to the | 54 // or nullptr if there is an error. |sequence_number| is appended to the |
| 55 // |nonce_prefix| value provided in SetNoncePrefix() to form the nonce. | 55 // |nonce_prefix| value provided in SetNoncePrefix() to form the nonce. |
| 56 virtual QuicData* EncryptPacket(QuicPacketSequenceNumber sequence_number, | 56 virtual bool EncryptPacket(QuicPacketSequenceNumber sequence_number, |
| 57 base::StringPiece associated_data, | 57 base::StringPiece associated_data, |
| 58 base::StringPiece plaintext) = 0; | 58 base::StringPiece plaintext, |
| 59 char* output, |
| 60 size_t* output_length, |
| 61 size_t max_output_length) = 0; |
| 59 | 62 |
| 60 // GetKeySize() and GetNoncePrefixSize() tell the HKDF class how many bytes | 63 // GetKeySize() and GetNoncePrefixSize() tell the HKDF class how many bytes |
| 61 // of key material needs to be derived from the master secret. | 64 // of key material needs to be derived from the master secret. |
| 62 // NOTE: the sizes returned by GetKeySize() and GetNoncePrefixSize() are | 65 // NOTE: the sizes returned by GetKeySize() and GetNoncePrefixSize() are |
| 63 // also correct for the QuicDecrypter of the same algorithm. So only | 66 // also correct for the QuicDecrypter of the same algorithm. So only |
| 64 // QuicEncrypter has these two methods. | 67 // QuicEncrypter has these two methods. |
| 65 | 68 |
| 66 // Returns the size in bytes of a key for the algorithm. | 69 // Returns the size in bytes of a key for the algorithm. |
| 67 virtual size_t GetKeySize() const = 0; | 70 virtual size_t GetKeySize() const = 0; |
| 68 // Returns the size in bytes of the fixed initial part of the nonce. | 71 // Returns the size in bytes of the fixed initial part of the nonce. |
| 69 virtual size_t GetNoncePrefixSize() const = 0; | 72 virtual size_t GetNoncePrefixSize() const = 0; |
| 70 | 73 |
| 71 // Returns the maximum length of plaintext that can be encrypted | 74 // Returns the maximum length of plaintext that can be encrypted |
| 72 // to ciphertext no larger than |ciphertext_size|. | 75 // to ciphertext no larger than |ciphertext_size|. |
| 73 virtual size_t GetMaxPlaintextSize(size_t ciphertext_size) const = 0; | 76 virtual size_t GetMaxPlaintextSize(size_t ciphertext_size) const = 0; |
| 74 | 77 |
| 75 // Returns the length of the ciphertext that would be generated by encrypting | 78 // Returns the length of the ciphertext that would be generated by encrypting |
| 76 // to plaintext of size |plaintext_size|. | 79 // to plaintext of size |plaintext_size|. |
| 77 virtual size_t GetCiphertextSize(size_t plaintext_size) const = 0; | 80 virtual size_t GetCiphertextSize(size_t plaintext_size) const = 0; |
| 78 | 81 |
| 79 // For use by unit tests only. | 82 // For use by unit tests only. |
| 80 virtual base::StringPiece GetKey() const = 0; | 83 virtual base::StringPiece GetKey() const = 0; |
| 81 virtual base::StringPiece GetNoncePrefix() const = 0; | 84 virtual base::StringPiece GetNoncePrefix() const = 0; |
| 82 }; | 85 }; |
| 83 | 86 |
| 84 } // namespace net | 87 } // namespace net |
| 85 | 88 |
| 86 #endif // NET_QUIC_CRYPTO_QUIC_ENCRYPTER_H_ | 89 #endif // NET_QUIC_CRYPTO_QUIC_ENCRYPTER_H_ |
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