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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_encrypter.h" | 5 #include "net/quic/crypto/null_encrypter.h" |
| 6 #include "net/quic/quic_data_writer.h" | 6 #include "net/quic/quic_data_writer.h" |
| 7 #include "net/quic/quic_utils.h" | 7 #include "net/quic/quic_utils.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 const size_t kHashSizeShort = 12; // size of uint128 serialized short | 14 const size_t kHashSizeShort = 12; // size of uint128 serialized short |
| 15 | 15 |
| 16 NullEncrypter::NullEncrypter() {} | 16 NullEncrypter::NullEncrypter() { |
| 17 } |
| 17 | 18 |
| 18 bool NullEncrypter::SetKey(StringPiece key) { return key.empty(); } | 19 bool NullEncrypter::SetKey(StringPiece key) { |
| 20 return key.empty(); |
| 21 } |
| 19 | 22 |
| 20 bool NullEncrypter::SetNoncePrefix(StringPiece nonce_prefix) { | 23 bool NullEncrypter::SetNoncePrefix(StringPiece nonce_prefix) { |
| 21 return nonce_prefix.empty(); | 24 return nonce_prefix.empty(); |
| 22 } | 25 } |
| 23 | 26 |
| 24 bool NullEncrypter::Encrypt( | 27 bool NullEncrypter::Encrypt(StringPiece /*nonce*/, |
| 25 StringPiece /*nonce*/, | 28 StringPiece associated_data, |
| 26 StringPiece associated_data, | 29 StringPiece plaintext, |
| 27 StringPiece plaintext, | 30 unsigned char* output) { |
| 28 unsigned char* output) { | |
| 29 string buffer = associated_data.as_string(); | 31 string buffer = associated_data.as_string(); |
| 30 plaintext.AppendToString(&buffer); | 32 plaintext.AppendToString(&buffer); |
| 31 uint128 hash = QuicUtils::FNV1a_128_Hash(buffer.data(), buffer.length()); | 33 uint128 hash = QuicUtils::FNV1a_128_Hash(buffer.data(), buffer.length()); |
| 32 QuicUtils::SerializeUint128Short(hash, output); | 34 QuicUtils::SerializeUint128Short(hash, output); |
| 33 memcpy(output + GetHashLength(), plaintext.data(), plaintext.size()); | 35 memcpy(output + GetHashLength(), plaintext.data(), plaintext.size()); |
| 34 return true; | 36 return true; |
| 35 } | 37 } |
| 36 | 38 |
| 37 QuicData* NullEncrypter::EncryptPacket( | 39 QuicData* NullEncrypter::EncryptPacket( |
| 38 QuicPacketSequenceNumber /*sequence_number*/, | 40 QuicPacketSequenceNumber /*sequence_number*/, |
| 39 StringPiece associated_data, | 41 StringPiece associated_data, |
| 40 StringPiece plaintext) { | 42 StringPiece plaintext) { |
| 41 const size_t len = plaintext.size() + GetHashLength(); | 43 const size_t len = plaintext.size() + GetHashLength(); |
| 42 uint8* buffer = new uint8[len]; | 44 uint8* buffer = new uint8[len]; |
| 43 Encrypt(StringPiece(), associated_data, plaintext, buffer); | 45 Encrypt(StringPiece(), associated_data, plaintext, buffer); |
| 44 return new QuicData(reinterpret_cast<char*>(buffer), len, true); | 46 return new QuicData(reinterpret_cast<char*>(buffer), len, true); |
| 45 } | 47 } |
| 46 | 48 |
| 47 size_t NullEncrypter::GetKeySize() const { return 0; } | 49 size_t NullEncrypter::GetKeySize() const { |
| 50 return 0; |
| 51 } |
| 48 | 52 |
| 49 size_t NullEncrypter::GetNoncePrefixSize() const { return 0; } | 53 size_t NullEncrypter::GetNoncePrefixSize() const { |
| 54 return 0; |
| 55 } |
| 50 | 56 |
| 51 size_t NullEncrypter::GetMaxPlaintextSize(size_t ciphertext_size) const { | 57 size_t NullEncrypter::GetMaxPlaintextSize(size_t ciphertext_size) const { |
| 52 return ciphertext_size - GetHashLength(); | 58 return ciphertext_size - GetHashLength(); |
| 53 } | 59 } |
| 54 | 60 |
| 55 size_t NullEncrypter::GetCiphertextSize(size_t plaintext_size) const { | 61 size_t NullEncrypter::GetCiphertextSize(size_t plaintext_size) const { |
| 56 return plaintext_size + GetHashLength(); | 62 return plaintext_size + GetHashLength(); |
| 57 } | 63 } |
| 58 | 64 |
| 59 StringPiece NullEncrypter::GetKey() const { return StringPiece(); } | 65 StringPiece NullEncrypter::GetKey() const { |
| 66 return StringPiece(); |
| 67 } |
| 60 | 68 |
| 61 StringPiece NullEncrypter::GetNoncePrefix() const { return StringPiece(); } | 69 StringPiece NullEncrypter::GetNoncePrefix() const { |
| 70 return StringPiece(); |
| 71 } |
| 62 | 72 |
| 63 size_t NullEncrypter::GetHashLength() const { | 73 size_t NullEncrypter::GetHashLength() const { |
| 64 return kHashSizeShort; | 74 return kHashSizeShort; |
| 65 } | 75 } |
| 66 | 76 |
| 67 } // namespace net | 77 } // namespace net |
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