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// Copyright 2016 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/validating_authenticator.h"
#include <memory>
#include <string>
#include <utility>
#include "base/bind.h"
#include "base/callback.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "remoting/protocol/authenticator.h"
#include "remoting/protocol/channel_authenticator.h"
#include "third_party/libjingle_xmpp/xmllite/xmlelement.h"
namespace remoting {
namespace protocol {
ValidatingAuthenticator::ValidatingAuthenticator(
const std::string& remote_jid,
const ValidationCallback& validation_callback,
std::unique_ptr<Authenticator> current_authenticator)
: remote_jid_(remote_jid),
validation_callback_(validation_callback),
current_authenticator_(std::move(current_authenticator)),
weak_factory_(this) {
DCHECK(!remote_jid_.empty());
DCHECK(!validation_callback_.is_null());
DCHECK(current_authenticator_);
}
ValidatingAuthenticator::~ValidatingAuthenticator() {}
Authenticator::State ValidatingAuthenticator::state() const {
return state_;
}
bool ValidatingAuthenticator::started() const {
return current_authenticator_->started();
}
Authenticator::RejectionReason ValidatingAuthenticator::rejection_reason()
const {
return rejection_reason_;
}
const std::string& ValidatingAuthenticator::GetAuthKey() const {
return current_authenticator_->GetAuthKey();
}
std::unique_ptr<ChannelAuthenticator>
ValidatingAuthenticator::CreateChannelAuthenticator() const {
return current_authenticator_->CreateChannelAuthenticator();
}
void ValidatingAuthenticator::ProcessMessage(
const buzz::XmlElement* message,
const base::Closure& resume_callback) {
DCHECK_EQ(state_, WAITING_MESSAGE);
state_ = PROCESSING_MESSAGE;
if (first_message_received_) {
current_authenticator_->ProcessMessage(
message, base::Bind(&ValidatingAuthenticator::UpdateState,
weak_factory_.GetWeakPtr(), resume_callback));
} else {
first_message_received_ = true;
validation_callback_.Run(
remote_jid_, base::Bind(&ValidatingAuthenticator::OnValidateComplete,
weak_factory_.GetWeakPtr(),
base::Owned(new buzz::XmlElement(*message)),
resume_callback));
}
}
std::unique_ptr<buzz::XmlElement> ValidatingAuthenticator::GetNextMessage() {
std::unique_ptr<buzz::XmlElement> result(
current_authenticator_->GetNextMessage());
state_ = current_authenticator_->state();
DCHECK(state_ == ACCEPTED || state_ == WAITING_MESSAGE);
return result;
}
void ValidatingAuthenticator::OnValidateComplete(
const buzz::XmlElement* message,
const base::Closure& resume_callback,
Result validation_result) {
// Process the original message in the success case, otherwise map
// |rejection_reason_| to a known reason, set |state_| to REJECTED and notify
// the listener of the connection error via the callback.
switch (validation_result) {
case Result::SUCCESS:
current_authenticator_->ProcessMessage(
message, base::Bind(&ValidatingAuthenticator::UpdateState,
weak_factory_.GetWeakPtr(), resume_callback));
return;
case Result::ERROR_INVALID_CREDENTIALS:
rejection_reason_ = Authenticator::INVALID_CREDENTIALS;
break;
case Result::ERROR_INVALID_ACCOUNT:
rejection_reason_ = Authenticator::INVALID_ACCOUNT;
break;
case Result::ERROR_REJECTED_BY_USER:
rejection_reason_ = Authenticator::REJECTED_BY_USER;
break;
}
state_ = Authenticator::REJECTED;
resume_callback.Run();
}
void ValidatingAuthenticator::UpdateState(
const base::Closure& resume_callback) {
DCHECK_EQ(state_, PROCESSING_MESSAGE);
// Update our current state before running |resume_callback|.
state_ = current_authenticator_->state();
if (state_ == REJECTED) {
rejection_reason_ = current_authenticator_->rejection_reason();
}
resume_callback.Run();
}
} // namespace protocol
} // namespace remoting
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