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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;
using net::SpdyPriority;
namespace net {
#define ENDPOINT \
(session()->perspective() == Perspective::IS_SERVER ? "Server: " : "Client:" \
" ")
QuicCryptoStream::QuicCryptoStream(QuicSession* session)
: ReliableQuicStream(kCryptoStreamId, session),
encryption_established_(false),
handshake_confirmed_(false) {
crypto_framer_.set_visitor(this);
// 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);
}
void QuicCryptoStream::OnDataAvailable() {
struct iovec iov;
while (true) {
if (sequencer()->GetReadableRegions(&iov, 1) != 1) {
// No more data to read.
break;
}
StringPiece data(static_cast<char*>(iov.iov_base), iov.iov_len);
if (!crypto_framer_.ProcessInput(data)) {
CloseConnectionWithDetails(crypto_framer_.error(),
crypto_framer_.error_detail());
return;
}
sequencer()->MarkConsumed(iov.iov_len);
}
}
void QuicCryptoStream::SendHandshakeMessage(
const CryptoHandshakeMessage& message) {
SendHandshakeMessage(message, nullptr);
}
void QuicCryptoStream::SendHandshakeMessage(
const CryptoHandshakeMessage& message,
QuicAckListenerInterface* listener) {
DVLOG(1) << ENDPOINT << "Sending " << message.DebugString();
session()->OnCryptoHandshakeMessageSent(message);
const QuicData& data = message.GetSerialized();
// TODO(wtc): check the return value.
WriteOrBufferData(StringPiece(data.data(), data.length()), false, listener);
}
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);
}
bool QuicCryptoStream::ExportTokenBindingKeyingMaterial(string* result) const {
if (!encryption_established()) {
QUIC_BUG << "ExportTokenBindingKeyingMaterial was called before initial"
<< "encryption was established.";
return false;
}
return CryptoUtils::ExportKeyingMaterial(
crypto_negotiated_params_.initial_subkey_secret, "EXPORTER-Token-Binding",
/* context= */ "", 32, result);
}
const QuicCryptoNegotiatedParameters&
QuicCryptoStream::crypto_negotiated_params() const {
return crypto_negotiated_params_;
}
} // namespace net
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