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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.
#ifndef NET_CERT_CERT_DATABASE_H_
#define NET_CERT_CERT_DATABASE_H_
#include <memory>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "net/base/net_export.h"
#include "net/cert/x509_certificate.h"
namespace base {
template <typename T> struct DefaultSingletonTraits;
template <class ObserverType>
class ObserverListThreadSafe;
}
namespace net {
// This class provides cross-platform functions to verify and add user
// certificates, and to observe changes to the underlying certificate stores.
// TODO(gauravsh): This class could be augmented with methods
// for all operations that manipulate the underlying system
// certificate store.
class NET_EXPORT CertDatabase {
public:
// A CertDatabase::Observer will be notified on certificate database changes.
// The change could be either a user certificate is added/removed or trust on
// a certificate is changed. Observers can be registered via
// CertDatabase::AddObserver, and can un-register with
// CertDatabase::RemoveObserver.
class NET_EXPORT Observer {
public:
virtual ~Observer() {}
// Called whenever the Cert Database is known to have changed.
// Typically, this will be in response to a CA certificate being added,
// removed, or its trust changed, but may also signal on client
// certificate events when they can be reliably detected.
virtual void OnCertDBChanged() {}
protected:
Observer() {}
private:
DISALLOW_COPY_AND_ASSIGN(Observer);
};
// Returns the CertDatabase singleton.
static CertDatabase* GetInstance();
// Registers |observer| to receive notifications of certificate changes. The
// thread on which this is called is the thread on which |observer| will be
// called back with notifications.
void AddObserver(Observer* observer);
// Unregisters |observer| from receiving notifications. This must be called
// on the same thread on which AddObserver() was called.
void RemoveObserver(Observer* observer);
#if defined(OS_MACOSX) && !defined(OS_IOS)
// Configures the current message loop to observe and forward events from
// Keychain services. The MessageLoop must have an associated CFRunLoop,
// which means that this must be called from a MessageLoop of TYPE_UI.
void SetMessageLoopForKeychainEvents();
#endif
#if defined(OS_ANDROID)
// On Android, the system key store may be replaced with a device-specific
// KeyStore used for storing client certificates. When the Java side replaces
// the KeyStore used for client certificates, notifies the observers as if a
// new client certificate was added.
void OnAndroidKeyStoreChanged();
// On Android, the system database is used. When the system notifies the
// application that the certificates changed, the observers must be notified.
void OnAndroidKeyChainChanged();
#endif
// Synthetically injects notifications to all observers. In general, this
// should only be called by the creator of the CertDatabase. Used to inject
// notifcations from other DB interfaces.
void NotifyObserversCertDBChanged();
private:
friend struct base::DefaultSingletonTraits<CertDatabase>;
CertDatabase();
~CertDatabase();
const scoped_refptr<base::ObserverListThreadSafe<Observer>> observer_list_;
#if defined(OS_MACOSX) && !defined(OS_IOS)
class Notifier;
friend class Notifier;
std::unique_ptr<Notifier> notifier_;
#endif
DISALLOW_COPY_AND_ASSIGN(CertDatabase);
};
} // namespace net
#endif // NET_CERT_CERT_DATABASE_H_
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