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Issue 11125002: Add QuicFramer and friends. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Fix final comments. Created 8 years, 2 months ago
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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
3 // found in the LICENSE file.
4
5 #include "net/quic/crypto/null_encrypter.h"
6 #include "net/quic/quic_data_writer.h"
7 #include "net/quic/quic_utils.h"
8
9 using base::StringPiece;
10 using std::string;
11
12 namespace net {
13
14 const size_t kHashSize = 16; // size of uint128 serialized
15
16 QuicData* NullEncrypter::Encrypt(StringPiece associated_data,
17 StringPiece plaintext) {
18 // TODO(rch): avoid buffer copy here
19 string buffer = associated_data.as_string();
20 plaintext.AppendToString(&buffer);
21 uint128 hash = QuicUtils::FNV1a_128_Hash(buffer.data(), buffer.length());
22 QuicDataWriter writer(plaintext.length() + kHashSize);
23 writer.WriteUInt128(hash);
24 writer.WriteBytes(plaintext.data(), plaintext.length());
25 size_t len = writer.length();
26 return new QuicData(writer.take(), len, true);
27 }
28
29 size_t NullEncrypter::GetMaxPlaintextSize(size_t ciphertext_size) {
30 return ciphertext_size - kHashSize;
31 }
32
33 size_t NullEncrypter::GetCiphertextSize(size_t plaintext_size) {
34 return plaintext_size + kHashSize;
35 }
36
37 } // namespace net
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