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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 "remoting/protocol/fake_authenticator.h"
#include <utility>
#include "base/base64.h"
#include "base/callback_helpers.h"
#include "base/message_loop/message_loop.h"
#include "base/rand_util.h"
#include "base/strings/string_number_conversions.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "remoting/base/constants.h"
#include "remoting/protocol/p2p_stream_socket.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
namespace remoting {
namespace protocol {
FakeChannelAuthenticator::FakeChannelAuthenticator(bool accept, bool async)
: result_(accept ? net::OK : net::ERR_FAILED),
async_(async),
weak_factory_(this) {}
FakeChannelAuthenticator::~FakeChannelAuthenticator() {}
void FakeChannelAuthenticator::SecureAndAuthenticate(
scoped_ptr<P2PStreamSocket> socket,
const DoneCallback& done_callback) {
socket_ = std::move(socket);
done_callback_ = done_callback;
if (async_) {
if (result_ != net::OK) {
// Don't write anything if we are going to reject auth to make test
// ordering deterministic.
did_write_bytes_ = true;
} else {
scoped_refptr<net::IOBuffer> write_buf = new net::IOBuffer(1);
write_buf->data()[0] = 0;
int result = socket_->Write(
write_buf.get(), 1,
base::Bind(&FakeChannelAuthenticator::OnAuthBytesWritten,
weak_factory_.GetWeakPtr()));
if (result != net::ERR_IO_PENDING) {
// This will not call the callback because |did_read_bytes_| is
// still set to false.
OnAuthBytesWritten(result);
}
}
scoped_refptr<net::IOBuffer> read_buf = new net::IOBuffer(1);
int result =
socket_->Read(read_buf.get(), 1,
base::Bind(&FakeChannelAuthenticator::OnAuthBytesRead,
weak_factory_.GetWeakPtr()));
if (result != net::ERR_IO_PENDING)
OnAuthBytesRead(result);
} else {
CallDoneCallback();
}
}
void FakeChannelAuthenticator::OnAuthBytesWritten(int result) {
EXPECT_EQ(1, result);
EXPECT_FALSE(did_write_bytes_);
did_write_bytes_ = true;
if (did_read_bytes_)
CallDoneCallback();
}
void FakeChannelAuthenticator::OnAuthBytesRead(int result) {
EXPECT_EQ(1, result);
EXPECT_FALSE(did_read_bytes_);
did_read_bytes_ = true;
if (did_write_bytes_)
CallDoneCallback();
}
void FakeChannelAuthenticator::CallDoneCallback() {
if (result_ != net::OK)
socket_.reset();
base::ResetAndReturn(&done_callback_).Run(result_, std::move(socket_));
}
FakeAuthenticator::FakeAuthenticator(Type type,
int round_trips,
Action action,
bool async)
: type_(type), round_trips_(round_trips), action_(action), async_(async) {}
FakeAuthenticator::~FakeAuthenticator() {}
void FakeAuthenticator::set_messages_till_started(int messages) {
messages_till_started_ = messages;
}
Authenticator::State FakeAuthenticator::state() const {
EXPECT_LE(messages_, round_trips_ * 2);
if (messages_ >= round_trips_ * 2) {
if (action_ == REJECT) {
return REJECTED;
} else {
return ACCEPTED;
}
}
// Don't send the last message if this is a host that wants to
// reject a connection.
if (messages_ == round_trips_ * 2 - 1 &&
type_ == HOST && action_ == REJECT) {
return REJECTED;
}
// We are not done yet. process next message.
if ((messages_ % 2 == 0 && type_ == CLIENT) ||
(messages_ % 2 == 1 && type_ == HOST)) {
return MESSAGE_READY;
} else {
return WAITING_MESSAGE;
}
}
bool FakeAuthenticator::started() const {
return messages_ > messages_till_started_;
}
Authenticator::RejectionReason FakeAuthenticator::rejection_reason() const {
EXPECT_EQ(REJECTED, state());
return INVALID_CREDENTIALS;
}
void FakeAuthenticator::ProcessMessage(const buzz::XmlElement* message,
const base::Closure& resume_callback) {
EXPECT_EQ(WAITING_MESSAGE, state());
std::string id =
message->TextNamed(buzz::QName(kChromotingXmlNamespace, "id"));
EXPECT_EQ(id, base::IntToString(messages_));
// On the client receive the key in the last message.
if (type_ == CLIENT && messages_ == round_trips_ * 2 - 1) {
std::string key_base64 =
message->TextNamed(buzz::QName(kChromotingXmlNamespace, "key"));
EXPECT_TRUE(!key_base64.empty());
EXPECT_TRUE(base::Base64Decode(key_base64, &auth_key_));
}
++messages_;
resume_callback.Run();
}
scoped_ptr<buzz::XmlElement> FakeAuthenticator::GetNextMessage() {
EXPECT_EQ(MESSAGE_READY, state());
scoped_ptr<buzz::XmlElement> result(new buzz::XmlElement(
buzz::QName(kChromotingXmlNamespace, "authentication")));
buzz::XmlElement* id = new buzz::XmlElement(
buzz::QName(kChromotingXmlNamespace, "id"));
id->AddText(base::IntToString(messages_));
result->AddElement(id);
// Add authentication key in the last message sent from host to client.
if (type_ == HOST && messages_ == round_trips_ * 2 - 1) {
auth_key_ = base::RandBytesAsString(16);
buzz::XmlElement* key = new buzz::XmlElement(
buzz::QName(kChromotingXmlNamespace, "key"));
std::string key_base64;
base::Base64Encode(auth_key_, &key_base64);
key->AddText(key_base64);
result->AddElement(key);
}
++messages_;
return result;
}
const std::string& FakeAuthenticator::GetAuthKey() const {
EXPECT_EQ(ACCEPTED, state());
DCHECK(!auth_key_.empty());
return auth_key_;
}
scoped_ptr<ChannelAuthenticator>
FakeAuthenticator::CreateChannelAuthenticator() const {
EXPECT_EQ(ACCEPTED, state());
return make_scoped_ptr(
new FakeChannelAuthenticator(action_ != REJECT_CHANNEL, async_));
}
FakeHostAuthenticatorFactory::FakeHostAuthenticatorFactory(
int round_trips,
int messages_till_started,
FakeAuthenticator::Action action,
bool async)
: round_trips_(round_trips),
messages_till_started_(messages_till_started),
action_(action),
async_(async) {}
FakeHostAuthenticatorFactory::~FakeHostAuthenticatorFactory() {}
scoped_ptr<Authenticator> FakeHostAuthenticatorFactory::CreateAuthenticator(
const std::string& local_jid,
const std::string& remote_jid) {
scoped_ptr<FakeAuthenticator> authenticator(new FakeAuthenticator(
FakeAuthenticator::HOST, round_trips_, action_, async_));
authenticator->set_messages_till_started(messages_till_started_);
return std::move(authenticator);
}
} // namespace protocol
} // namespace remoting
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