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// Copyright (c) 2011 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 "remoting/protocol/jingle_stream_connector.h"
#include "jingle/glue/channel_socket_adapter.h"
#include "jingle/glue/pseudotcp_adapter.h"
#include "net/base/cert_status_flags.h"
#include "net/base/cert_verifier.h"
#include "net/base/host_port_pair.h"
#include "net/base/ssl_config_service.h"
#include "net/base/x509_certificate.h"
#include "net/socket/ssl_client_socket.h"
#include "net/socket/ssl_server_socket.h"
#include "net/socket/client_socket_factory.h"
#include "remoting/protocol/jingle_session.h"
namespace remoting {
namespace protocol {
namespace {
// Value is choosen to balance the extra latency against the reduced
// load due to ACK traffic.
const int kTcpAckDelayMilliseconds = 10;
// Helper method to create a SSL client socket.
net::SSLClientSocket* CreateSSLClientSocket(
net::StreamSocket* socket, const std::string& der_cert,
net::CertVerifier* cert_verifier) {
net::SSLConfig ssl_config;
// Certificate provided by the host doesn't need authority.
net::SSLConfig::CertAndStatus cert_and_status;
cert_and_status.cert_status = net::CERT_STATUS_AUTHORITY_INVALID;
cert_and_status.der_cert = der_cert;
ssl_config.allowed_bad_certs.push_back(cert_and_status);
// SSLClientSocket takes ownership of the adapter.
net::HostPortPair host_and_pair(JingleSession::kChromotingContentName, 0);
net::SSLClientSocketContext context;
context.cert_verifier = cert_verifier;
net::SSLClientSocket* ssl_socket =
net::ClientSocketFactory::GetDefaultFactory()->CreateSSLClientSocket(
socket, host_and_pair, ssl_config, NULL, context);
return ssl_socket;
}
} // namespace
JingleStreamConnector::JingleStreamConnector(
JingleSession* session,
const std::string& name,
const Session::StreamChannelCallback& callback)
: session_(session),
name_(name),
callback_(callback),
initiator_(false),
local_private_key_(NULL),
raw_channel_(NULL),
ALLOW_THIS_IN_INITIALIZER_LIST(tcp_connect_callback_(
this, &JingleStreamConnector::OnTCPConnect)),
ALLOW_THIS_IN_INITIALIZER_LIST(ssl_connect_callback_(
this, &JingleStreamConnector::OnSSLConnect)) {
}
JingleStreamConnector::~JingleStreamConnector() {
}
void JingleStreamConnector::Connect(bool initiator,
const std::string& local_cert,
const std::string& remote_cert,
crypto::RSAPrivateKey* local_private_key,
cricket::TransportChannel* raw_channel) {
DCHECK(CalledOnValidThread());
DCHECK(!raw_channel_);
initiator_ = initiator;
local_cert_ = local_cert;
remote_cert_ = remote_cert;
local_private_key_ = local_private_key;
raw_channel_ = raw_channel;
net::Socket* socket =
new jingle_glue::TransportChannelSocketAdapter(raw_channel_);
if (!EstablishTCPConnection(socket))
NotifyError();
}
bool JingleStreamConnector::EstablishTCPConnection(net::Socket* socket) {
jingle_glue::PseudoTcpAdapter* adapter =
new jingle_glue::PseudoTcpAdapter(socket);
adapter->SetAckDelay(kTcpAckDelayMilliseconds);
adapter->SetNoDelay(true);
socket_.reset(adapter);
int result = socket_->Connect(&tcp_connect_callback_);
if (result == net::ERR_IO_PENDING) {
return true;
} else if (result == net::OK) {
tcp_connect_callback_.Run(result);
return true;
}
return false;
}
bool JingleStreamConnector::EstablishSSLConnection() {
DCHECK(socket_->IsConnected());
int result;
if (initiator_) {
cert_verifier_.reset(new net::CertVerifier());
// Create client SSL socket.
net::SSLClientSocket* ssl_client_socket = CreateSSLClientSocket(
socket_.release(), remote_cert_, cert_verifier_.get());
socket_.reset(ssl_client_socket);
result = ssl_client_socket->Connect(&ssl_connect_callback_);
} else {
scoped_refptr<net::X509Certificate> cert =
net::X509Certificate::CreateFromBytes(
local_cert_.data(), local_cert_.length());
if (!cert) {
LOG(ERROR) << "Failed to parse X509Certificate";
return false;
}
// Create server SSL socket.
net::SSLConfig ssl_config;
net::SSLServerSocket* ssl_server_socket =
net::CreateSSLServerSocket(socket_.release(), cert,
local_private_key_, ssl_config);
socket_.reset(ssl_server_socket);
result = ssl_server_socket->Handshake(&ssl_connect_callback_);
}
if (result == net::ERR_IO_PENDING) {
return true;
} else if (result != net::OK) {
LOG(ERROR) << "Failed to establish SSL connection";
return false;
}
// Reach here if net::OK is received.
ssl_connect_callback_.Run(net::OK);
return true;
}
void JingleStreamConnector::OnTCPConnect(int result) {
DCHECK(CalledOnValidThread());
if (result != net::OK) {
LOG(ERROR) << "PseudoTCP connection failed: " << result;
NotifyError();
return;
}
if (!EstablishSSLConnection())
NotifyError();
}
void JingleStreamConnector::OnSSLConnect(int result) {
DCHECK(CalledOnValidThread());
if (result != net::OK) {
LOG(ERROR) << "Error during SSL connection: " << result;
NotifyError();
return;
}
DCHECK(socket_->IsConnected());
NotifyDone(socket_.release());
}
void JingleStreamConnector::NotifyDone(net::StreamSocket* socket) {
callback_.Run(name_, socket);
session_->OnChannelConnectorFinished(name_, this);
}
void JingleStreamConnector::NotifyError() {
socket_.reset();
callback_.Run(name_, NULL);
session_->OnChannelConnectorFinished(name_, this);
}
} // namespace protocol
} // namespace remoting
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