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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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