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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.
#ifndef CHROMEOS_NETWORK_CLIENT_CERT_RESOLVER_H_
#define CHROMEOS_NETWORK_CLIENT_CERT_RESOLVER_H_
#include <set>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "chromeos/cert_loader.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/network/client_cert_util.h"
#include "chromeos/network/network_policy_observer.h"
#include "chromeos/network/network_state_handler.h"
#include "chromeos/network/network_state_handler_observer.h"
namespace base {
class Clock;
}
namespace chromeos {
class NetworkState;
class ManagedNetworkConfigurationHandler;
// Observes the known networks. If a network is configured with a client
// certificate pattern, this class searches for a matching client certificate.
// Each time it finds a match, it configures the network accordingly.
class CHROMEOS_EXPORT ClientCertResolver : public NetworkStateHandlerObserver,
public CertLoader::Observer,
public NetworkPolicyObserver {
public:
struct NetworkAndMatchingCert;
class Observer {
public:
// Called every time resolving of client certificate patterns finishes,
// no resolve requests are pending and no tasks are running.
// |network_properties_changed| will be true if any network properties were
// changed by this resolver since the last notification.
virtual void ResolveRequestCompleted(bool network_properties_changed) = 0;
protected:
virtual ~Observer() {}
private:
DISALLOW_ASSIGN(Observer);
};
ClientCertResolver();
~ClientCertResolver() override;
void Init(NetworkStateHandler* network_state_handler,
ManagedNetworkConfigurationHandler* managed_network_config_handler);
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Returns true if any resolve tasks are running. Every time a task finishes
// and no further requests are pending, a notification is sent, see
// |Observer|.
bool IsAnyResolveTaskRunning() const;
// Sets the clock for testing. This clock is used when checking the
// certificates for expiration.
void SetClockForTesting(base::Clock* clock);
// Returns true and sets the Shill properties that have to be configured in
// |shill_properties| if the certificate pattern |pattern| could be resolved.
// Returns false otherwise and sets empty Shill properties to clear the
// certificate configuration.
// Note that it uses the global clock when checking the certificates for
// expiration.
static bool ResolveCertificatePatternSync(
const client_cert::ConfigType client_cert_type,
const client_cert::ClientCertConfig& client_cert_config,
base::DictionaryValue* shill_properties);
private:
// NetworkStateHandlerObserver overrides
void NetworkListChanged() override;
void NetworkConnectionStateChanged(const NetworkState* network) override;
// CertLoader::Observer overrides
void OnCertificatesLoaded(
const net::ScopedCERTCertificateList& cert_list) override;
// NetworkPolicyObserver overrides
void PolicyAppliedToNetwork(const std::string& service_path) override;
// Check which networks of |networks| are configured with a client certificate
// pattern. Search for certificates, on the worker thread, and configure the
// networks for which a matching cert is found (see ConfigureCertificates).
void ResolveNetworks(const NetworkStateHandler::NetworkStateList& networks);
// Resolves certificates for the pending networks. This will always trigger a
// ResolveRequestCompleted notification, even if the queue is empty.
void ResolvePendingNetworks();
// |matches| contains networks for which a matching certificate was found.
// Configures these networks.
void ConfigureCertificates(
std::unique_ptr<std::vector<NetworkAndMatchingCert>> matches);
// Trigger a ResolveRequestCompleted event on all observers.
void NotifyResolveRequestCompleted();
// Returns Time::Now() unless a mock clock has been installed with
// SetClockForTesting, in which case the time according to that clock is used
// instead.
base::Time Now() const;
base::ObserverList<Observer, true> observers_;
// The set of networks that were checked/resolved in previous passes. These
// networks are skipped in the NetworkListChanged notification.
std::set<std::string> resolved_networks_;
// The list of network paths that still have to be resolved.
std::set<std::string> queued_networks_to_resolve_;
// True if currently a resolve task is running.
bool resolve_task_running_;
// True if any network properties were changed since the last notification to
// observers.
bool network_properties_changed_;
// Unowned associated (global or test) instance.
NetworkStateHandler* network_state_handler_;
// Unowned associated (global or test) instance.
ManagedNetworkConfigurationHandler* managed_network_config_handler_;
// Can be set for testing.
base::Clock* testing_clock_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<ClientCertResolver> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ClientCertResolver);
};
} // namespace chromeos
#endif // CHROMEOS_NETWORK_CLIENT_CERT_RESOLVER_H_