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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 #include "net/quic/crypto/null_decrypter.h" | 5 #include "net/quic/crypto/null_decrypter.h" |
| 6 #include "net/quic/quic_utils.h" | 6 #include "net/quic/quic_utils.h" |
| 7 #include "net/quic/quic_data_reader.h" | 7 #include "net/quic/quic_data_reader.h" |
| 8 | 8 |
| 9 using base::StringPiece; | 9 using base::StringPiece; |
| 10 using std::string; | 10 using std::string; |
| 11 | 11 |
| 12 namespace net { | 12 namespace net { |
| 13 | 13 |
| 14 QuicData* NullDecrypter::Decrypt(StringPiece associated_data, | 14 bool NullDecrypter::SetKey(StringPiece key) { |
| 15 return key.empty(); |
| 16 } |
| 17 |
| 18 bool NullDecrypter::SetNoncePrefix(StringPiece nonce_prefix) { |
| 19 return nonce_prefix.empty(); |
| 20 } |
| 21 |
| 22 QuicData* NullDecrypter::Decrypt(QuicPacketSequenceNumber /*sequence_number*/, |
| 23 StringPiece associated_data, |
| 15 StringPiece ciphertext) { | 24 StringPiece ciphertext) { |
| 16 QuicDataReader reader(ciphertext.data(), ciphertext.length()); | 25 QuicDataReader reader(ciphertext.data(), ciphertext.length()); |
| 17 | 26 |
| 18 uint128 hash; | 27 uint128 hash; |
| 19 if (!reader.ReadUInt128(&hash)) { | 28 if (!reader.ReadUInt128(&hash)) { |
| 20 return NULL; | 29 return NULL; |
| 21 } | 30 } |
| 22 | 31 |
| 23 StringPiece plaintext = reader.ReadRemainingPayload(); | 32 StringPiece plaintext = reader.ReadRemainingPayload(); |
| 24 | 33 |
| 25 // TODO(rch): avoid buffer copy here | 34 // TODO(rch): avoid buffer copy here |
| 26 string buffer = associated_data.as_string(); | 35 string buffer = associated_data.as_string(); |
| 27 plaintext.AppendToString(&buffer); | 36 plaintext.AppendToString(&buffer); |
| 28 | 37 |
| 29 if (hash != QuicUtils::FNV1a_128_Hash(buffer.data(), buffer.length())) { | 38 if (hash != QuicUtils::FNV1a_128_Hash(buffer.data(), buffer.length())) { |
| 30 return NULL; | 39 return NULL; |
| 31 } | 40 } |
| 32 return new QuicData(plaintext.data(), plaintext.length()); | 41 return new QuicData(plaintext.data(), plaintext.length()); |
| 33 } | 42 } |
| 34 | 43 |
| 35 } // namespace net | 44 } // namespace net |
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