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// Copyright 2016 The Chromium Authors
// 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/check_op.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.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::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)) {
DCHECK(!remote_jid_.empty());
DCHECK(validation_callback_);
DCHECK(current_authenticator_);
ChainStateChangeAfterAcceptedWithUnderlying(*current_authenticator_);
}
ValidatingAuthenticator::~ValidatingAuthenticator() = default;
CredentialsType ValidatingAuthenticator::credentials_type() const {
return current_authenticator_->credentials_type();
}
const Authenticator& ValidatingAuthenticator::implementing_authenticator()
const {
return current_authenticator_->implementing_authenticator();
}
Authenticator::State ValidatingAuthenticator::state() const {
return pending_auth_message_ ? MESSAGE_READY : state_;
}
bool ValidatingAuthenticator::started() const {
return current_authenticator_->started();
}
Authenticator::RejectionReason ValidatingAuthenticator::rejection_reason()
const {
return rejection_reason_;
}
Authenticator::RejectionDetails ValidatingAuthenticator::rejection_details()
const {
return rejection_details_;
}
const std::string& ValidatingAuthenticator::GetAuthKey() const {
return current_authenticator_->GetAuthKey();
}
const SessionPolicies* ValidatingAuthenticator::GetSessionPolicies() const {
return current_authenticator_->GetSessionPolicies();
}
std::unique_ptr<ChannelAuthenticator>
ValidatingAuthenticator::CreateChannelAuthenticator() const {
return current_authenticator_->CreateChannelAuthenticator();
}
void ValidatingAuthenticator::ProcessMessage(
const jingle_xmpp::XmlElement* message,
base::OnceClosure resume_callback) {
DCHECK_EQ(state_, WAITING_MESSAGE);
state_ = PROCESSING_MESSAGE;
current_authenticator_->ProcessMessage(
message,
base::BindOnce(&ValidatingAuthenticator::UpdateState,
weak_factory_.GetWeakPtr(), std::move(resume_callback)));
}
std::unique_ptr<jingle_xmpp::XmlElement>
ValidatingAuthenticator::GetNextMessage() {
if (pending_auth_message_) {
DCHECK(state_ == ACCEPTED || state_ == WAITING_MESSAGE);
return std::move(pending_auth_message_);
}
std::unique_ptr<jingle_xmpp::XmlElement> result(
current_authenticator_->GetNextMessage());
state_ = current_authenticator_->state();
DCHECK(state_ == ACCEPTED || state_ == WAITING_MESSAGE);
return result;
}
void ValidatingAuthenticator::OnValidateComplete(base::OnceClosure callback,
Result validation_result) {
// 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:
state_ = ACCEPTED;
std::move(callback).Run();
return;
case Result::ERROR_INVALID_CREDENTIALS:
rejection_reason_ = RejectionReason::INVALID_CREDENTIALS;
break;
case Result::ERROR_INVALID_ACCOUNT:
rejection_reason_ = RejectionReason::INVALID_ACCOUNT_ID;
break;
case Result::ERROR_TOO_MANY_CONNECTIONS:
rejection_reason_ = RejectionReason::TOO_MANY_CONNECTIONS;
break;
case Result::ERROR_REJECTED_BY_USER:
rejection_reason_ = RejectionReason::REJECTED_BY_USER;
break;
case Result::ERROR_UNAUTHORIZED_ACCOUNT:
rejection_reason_ = RejectionReason::UNAUTHORIZED_ACCOUNT;
break;
}
state_ = Authenticator::REJECTED;
rejection_details_ = RejectionDetails("Validation failed.");
// Clear the pending message so the signal strategy will generate a new
// SESSION_REJECT message in response to this state change.
pending_auth_message_.reset();
std::move(callback).Run();
}
void ValidatingAuthenticator::UpdateState(base::OnceClosure 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();
rejection_details_ = current_authenticator_->rejection_details();
} else if (state_ == MESSAGE_READY) {
DCHECK(!pending_auth_message_);
pending_auth_message_ = current_authenticator_->GetNextMessage();
state_ = current_authenticator_->state();
}
if (state_ == ACCEPTED) {
state_ = PROCESSING_MESSAGE;
validation_callback_.Run(
remote_jid_,
base::BindOnce(&ValidatingAuthenticator::OnValidateComplete,
weak_factory_.GetWeakPtr(), std::move(resume_callback)));
} else {
std::move(resume_callback).Run();
}
}
void ValidatingAuthenticator::NotifyStateChangeAfterAccepted() {
state_ = current_authenticator_->state();
if (state_ == REJECTED) {
rejection_reason_ = current_authenticator_->rejection_reason();
rejection_details_ = current_authenticator_->rejection_details();
}
Authenticator::NotifyStateChangeAfterAccepted();
}
} // namespace remoting::protocol
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