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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/quic/quic_crypto_stream.h"
#include <string>
#include "base/strings/string_piece.h"
#include "net/quic/crypto/crypto_handshake.h"
#include "net/quic/crypto/crypto_utils.h"
#include "net/quic/quic_connection.h"
#include "net/quic/quic_session.h"
#include "net/quic/quic_utils.h"
using std::string;
using base::StringPiece;
namespace net {
#define ENDPOINT (is_server_ ? "Server: " : " Client: ")
QuicCryptoStream::QuicCryptoStream(QuicSession* session)
: ReliableQuicStream(kCryptoStreamId, session),
encryption_established_(false),
handshake_confirmed_(false),
is_server_(session->is_server()) {
crypto_framer_.set_visitor(this);
if (version() <= QUIC_VERSION_20) {
// Prior to QUIC_VERSION_21 the crypto stream is not subject to any flow
// control.
DisableFlowControl();
}
// The crypto stream is exempt from connection level flow control.
DisableConnectionFlowControlForThisStream();
}
void QuicCryptoStream::OnError(CryptoFramer* framer) {
DLOG(WARNING) << "Error processing crypto data: "
<< QuicUtils::ErrorToString(framer->error());
}
void QuicCryptoStream::OnHandshakeMessage(
const CryptoHandshakeMessage& message) {
DVLOG(1) << ENDPOINT << "Received " << message.DebugString();
session()->OnCryptoHandshakeMessageReceived(message);
}
uint32 QuicCryptoStream::ProcessRawData(const char* data,
uint32 data_len) {
if (!crypto_framer_.ProcessInput(StringPiece(data, data_len))) {
CloseConnection(crypto_framer_.error());
return 0;
}
return data_len;
}
QuicPriority QuicCryptoStream::EffectivePriority() const {
return QuicUtils::HighestPriority();
}
void QuicCryptoStream::SendHandshakeMessage(
const CryptoHandshakeMessage& message) {
SendHandshakeMessage(message, NULL);
}
void QuicCryptoStream::SendHandshakeMessage(
const CryptoHandshakeMessage& message,
QuicAckNotifier::DelegateInterface* delegate) {
DVLOG(1) << ENDPOINT << "Sending " << message.DebugString();
session()->OnCryptoHandshakeMessageSent(message);
const QuicData& data = message.GetSerialized();
// TODO(wtc): check the return value.
WriteOrBufferData(string(data.data(), data.length()), false, delegate);
}
bool QuicCryptoStream::ExportKeyingMaterial(
StringPiece label,
StringPiece context,
size_t result_len,
string* result) const {
if (!handshake_confirmed()) {
DLOG(ERROR) << "ExportKeyingMaterial was called before forward-secure"
<< "encryption was established.";
return false;
}
return CryptoUtils::ExportKeyingMaterial(
crypto_negotiated_params_.subkey_secret,
label,
context,
result_len,
result);
}
const QuicCryptoNegotiatedParameters&
QuicCryptoStream::crypto_negotiated_params() const {
return crypto_negotiated_params_;
}
} // namespace net
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