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// Copyright 2013 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/pairing_client_authenticator.h"
#include "base/bind.h"
#include "base/logging.h"
#include "remoting/base/constants.h"
#include "remoting/protocol/auth_util.h"
#include "remoting/protocol/channel_authenticator.h"
#include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
namespace remoting {
namespace protocol {
PairingClientAuthenticator::PairingClientAuthenticator(
const ClientAuthenticationConfig& client_auth_config,
const CreateBaseAuthenticatorCallback& create_base_authenticator_callback)
: client_auth_config_(client_auth_config),
create_base_authenticator_callback_(create_base_authenticator_callback),
weak_factory_(this) {}
PairingClientAuthenticator::~PairingClientAuthenticator() {}
void PairingClientAuthenticator::Start(State initial_state,
const base::Closure& resume_callback) {
if (client_auth_config_.pairing_client_id.empty() ||
client_auth_config_.pairing_secret.empty()) {
// Send pairing error to make it clear that PIN is being used instead of
// pairing secret.
error_message_ = "not-paired";
using_paired_secret_ = false;
CreateSpakeAuthenticatorWithPin(initial_state, resume_callback);
} else {
StartPaired(initial_state);
resume_callback.Run();
}
}
void PairingClientAuthenticator::StartPaired(State initial_state) {
DCHECK(!client_auth_config_.pairing_client_id.empty());
DCHECK(!client_auth_config_.pairing_secret.empty());
using_paired_secret_ = true;
spake2_authenticator_ = create_base_authenticator_callback_.Run(
client_auth_config_.pairing_secret, initial_state);
}
Authenticator::State PairingClientAuthenticator::state() const {
if (waiting_for_pin_)
return PROCESSING_MESSAGE;
return PairingAuthenticatorBase::state();
}
void PairingClientAuthenticator::CreateSpakeAuthenticatorWithPin(
State initial_state,
const base::Closure& resume_callback) {
DCHECK(!waiting_for_pin_);
waiting_for_pin_ = true;
client_auth_config_.fetch_secret_callback.Run(
true,
base::Bind(&PairingClientAuthenticator::OnPinFetched,
weak_factory_.GetWeakPtr(), initial_state, resume_callback));
}
void PairingClientAuthenticator::OnPinFetched(
State initial_state,
const base::Closure& resume_callback,
const std::string& pin) {
DCHECK(waiting_for_pin_);
DCHECK(!spake2_authenticator_);
waiting_for_pin_ = false;
spake2_authenticator_ = create_base_authenticator_callback_.Run(
GetSharedSecretHash(client_auth_config_.host_id, pin), initial_state);
resume_callback.Run();
}
} // namespace protocol
} // namespace remoting
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