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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// This StreamSocket implementation is to be used with servers that
// accept connections on port 443 but don't really use SSL. For
// example, the Google Talk servers do this to bypass proxies. (The
// connection is upgraded to TLS as part of the XMPP negotiation, so
// security is preserved.) A "fake" SSL handshake is done immediately
// after connection to fool proxies into thinking that this is a real
// SSL connection.
//
// NOTE: This StreamSocket implementation does *not* do a real SSL
// handshake nor does it do any encryption!
#ifndef COMPONENTS_WEBRTC_FAKE_SSL_CLIENT_SOCKET_H_
#define COMPONENTS_WEBRTC_FAKE_SSL_CLIENT_SOCKET_H_
#include <stdint.h>
#include <cstddef>
#include <memory>
#include <string_view>
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "net/base/completion_once_callback.h"
#include "net/base/net_errors.h"
#include "net/socket/stream_socket.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
namespace net {
class DrainableIOBuffer;
class SSLInfo;
} // namespace net
namespace webrtc {
class FakeSSLClientSocket : public net::StreamSocket {
public:
explicit FakeSSLClientSocket(
std::unique_ptr<net::StreamSocket> transport_socket);
~FakeSSLClientSocket() override;
// Exposed for testing.
static std::string_view GetSslClientHello();
static std::string_view GetSslServerHello();
// net::StreamSocket implementation.
int Read(net::IOBuffer* buf,
int buf_len,
net::CompletionOnceCallback callback) override;
int ReadIfReady(net::IOBuffer* buf,
int buf_len,
net::CompletionOnceCallback callback) override;
int CancelReadIfReady() override;
int Write(
net::IOBuffer* buf,
int buf_len,
net::CompletionOnceCallback callback,
const net::NetworkTrafficAnnotationTag& traffic_annotation) override;
int SetReceiveBufferSize(int32_t size) override;
int SetSendBufferSize(int32_t size) override;
int Connect(net::CompletionOnceCallback callback) override;
void Disconnect() override;
bool IsConnected() const override;
bool IsConnectedAndIdle() const override;
int GetPeerAddress(net::IPEndPoint* address) const override;
int GetLocalAddress(net::IPEndPoint* address) const override;
const net::NetLogWithSource& NetLog() const override;
bool WasEverUsed() const override;
net::NextProto GetNegotiatedProtocol() const override;
bool GetSSLInfo(net::SSLInfo* ssl_info) override;
int64_t GetTotalReceivedBytes() const override;
void ApplySocketTag(const net::SocketTag& tag) override;
private:
enum HandshakeState {
STATE_NONE,
STATE_CONNECT,
STATE_SEND_CLIENT_HELLO,
STATE_VERIFY_SERVER_HELLO,
};
int DoHandshakeLoop();
void RunUserConnectCallback(int status);
void DoHandshakeLoopWithUserConnectCallback();
int DoConnect();
void OnConnectDone(int status);
void ProcessConnectDone();
int DoSendClientHello();
void OnSendClientHelloDone(int status);
void ProcessSendClientHelloDone(size_t written);
int DoVerifyServerHello();
void OnVerifyServerHelloDone(int status);
net::Error ProcessVerifyServerHelloDone(size_t read);
std::unique_ptr<net::StreamSocket> transport_socket_;
// During the handshake process, holds a value from HandshakeState.
// STATE_NONE otherwise.
HandshakeState next_handshake_state_;
// True iff we're connected and we've finished the handshake.
bool handshake_completed_;
// The callback passed to Connect().
net::CompletionOnceCallback user_connect_callback_;
::scoped_refptr<net::DrainableIOBuffer> write_buf_;
::scoped_refptr<net::DrainableIOBuffer> read_buf_;
};
} // namespace webrtc
#endif // COMPONENTS_WEBRTC_FAKE_SSL_CLIENT_SOCKET_H_
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