IdentityCredentialStorageService.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this file,

 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_IDENTITYCREDENTIALSTORAGESERVICE_H_

#define MOZILLA_IDENTITYCREDENTIALSTORAGESERVICE_H_

#include "ErrorList.h"

#include "mozilla/AlreadyAddRefed.h"

#include "mozilla/dom/FlippedOnce.h"

#include "mozilla/Monitor.h"

#include "mozilla/OriginAttributes.h"

#include "mozIStorageConnection.h"

#include "mozIStorageFunction.h"

#include "mozilla/dom/IPCIdentityCredential.h"

#include "nsIAsyncShutdown.h"

#include "nsIFile.h"

#include "nsIIdentityCredentialStorageService.h"

#include "nsIObserver.h"

#include "nsISupports.h"

#include "nsThreadUtils.h"

namespace mozilla {

class IdentityCredentialStorageService final

    : public nsIIdentityCredentialStorageService,

      public nsIObserver,

      public nsIAsyncShutdownBlocker {

 public:

  NS_DECL_THREADSAFE_ISUPPORTS

  NS_DECL_NSIIDENTITYCREDENTIALSTORAGESERVICE

  NS_DECL_NSIOBSERVER

  NS_DECL_NSIASYNCSHUTDOWNBLOCKER

  // Returns the singleton instance. Used by the component manager

  static already_AddRefed<IdentityCredentialStorageService> GetSingleton();

  // Singletons shouldn't have copy constructors or assignment operators

  IdentityCredentialStorageService(const IdentityCredentialStorageService&) =

      delete;

  IdentityCredentialStorageService& operator=(

      const IdentityCredentialStorageService&) = delete;

 private:

  IdentityCredentialStorageService()

      : mMonitor("mozilla::IdentityCredentialStorageService::mMonitor"),

        mPendingWrites(0) {};

  ~IdentityCredentialStorageService() = default;

  // Spins up the service. This includes firing off async work in a worker

  // thread. This should always be called before other use of the service to

  // prevent deadlock.

  nsresult Init();

  // Wait (non-blocking) until the service is fully initialized. We may be

  // waiting for that async work started by Init().

  nsresult WaitForInitialization();

  // Utility function to grab the correct barrier this service needs to shut

  // down by

  already_AddRefed<nsIAsyncShutdownClient> GetAsyncShutdownBarrier() const;

  // Called to indicate to the async shutdown service that we are all wrapped

  // up. This also spins down the worker thread, since it is called after all

  // disk database connections are closed.

  void Finalize();

  // Utility function to make sure a principal is an acceptable primary (RP)

  // principal

  static nsresult ValidatePrincipal(nsIPrincipal* aPrincipal);

  // Helper functions to initialize the database connections. Also makes sure

  // the tables are present and have up to date schemas.

  nsresult GetMemoryDatabaseConnection();

  nsresult GetDiskDatabaseConnection();

  static nsresult GetDatabaseConnectionInternal(

      mozIStorageConnection** aDatabase, nsIFile* aFile);

  // Helper function for the Get*DatabaseConnection functions to ensure the

  // tables are present and have up to date schemas.

  static nsresult EnsureTable(mozIStorageConnection* aDatabase);

  // Grab all data from the disk database and insert it into the memory

  // database/ This is used at start up

  nsresult LoadMemoryTableFromDisk();

  nsresult LoadLightweightMemoryTableFromDisk();

  nsresult LoadHeavyweightMemoryTableFromDisk();

  // Used to (thread-safely) track how many operations have been launched to the

  // worker thread so that we can wait for it to hit zero before close the disk

  // database connection

  void IncrementPendingWrites();

  void DecrementPendingWrites();

  // Helper functions for database writes.

  //   We have helper functions here for all operations we perform on the

  //   databases that invlolve writes. These are split out and take a connection

  //   as an argument because we have to write to both the memory database and

  //   the disk database, where we only read from the memory database after

  //   initialization. See nsIIdentityCredentialStorageService.idl for more info

  //   on these functions' semantics

  // Upsert == Update or Insert! Uses some nice SQLite syntax to make this easy.

  static nsresult UpsertData(mozIStorageConnection* aDatabaseConnection,

                             nsIPrincipal* aRPPrincipal,

                             nsIPrincipal* aIDPPrincipal,

                             nsACString const& aCredentialID, bool aRegistered,

                             bool aAllowLogout);

  static nsresult DeleteData(mozIStorageConnection* aDatabaseConnection,

                             nsIPrincipal* aRPPrincipal,

                             nsIPrincipal* aIDPPrincipal,

                             nsACString const& aCredentialID);

  static nsresult ClearData(mozIStorageConnection* aDatabaseConnection);

  static nsresult UpsertLightweightData(

      mozIStorageConnection* aDatabaseConnection,

      const dom::IPCIdentityCredential& aData);

  static nsresult DeleteLightweightData(

      mozIStorageConnection* aDatabaseConnection,

      const dom::IPCIdentityCredential& aData);

  static nsresult DeleteDataFromOriginAttributesPattern(

      mozIStorageConnection* aDatabaseConnection,

      OriginAttributesPattern const& aOriginAttributesPattern);

  static nsresult DeleteDataFromTimeRange(

      mozIStorageConnection* aDatabaseConnection, int64_t aStart, int64_t aEnd);

  static nsresult DeleteDataFromPrincipal(

      mozIStorageConnection* aDatabaseConnection, nsIPrincipal* aPrincipal);

  static nsresult DeleteDataFromBaseDomain(

      mozIStorageConnection* aDatabaseConnection,

      nsACString const& aBaseDomain);

  // Database connections. Guaranteed to be non-null and working once

  // initialized and not-yet finalized

  RefPtr<mozIStorageConnection> mDiskDatabaseConnection;  // Worker thread only

  RefPtr<mozIStorageConnection>

      mMemoryDatabaseConnection;  // Main thread only after initialization,

                                  // worker thread only before initialization.

  // Worker thread. This should be a valid thread after Init() returns and be

  // destroyed when we finalize

  nsCOMPtr<nsISerialEventTarget> mBackgroundThread;  // main thread only

  // The database file handle. We can only create this in the main thread and

  // need it in the worker to perform blocking disk IO. So we put it on this,

  // since we pass this to the worker anyway

  RefPtr<nsIFile> mDatabaseFile;  // initialized in the main thread, read-only

                                  // in worker thread

  // Service state management. We protect these variables with a monitor. This

  // monitor is also used to signal the completion of initialization and

  // finalization performed in the worker thread.

  Monitor mMonitor;

  FlippedOnce<false> mInitialized MOZ_GUARDED_BY(mMonitor);

  FlippedOnce<false> mErrored MOZ_GUARDED_BY(mMonitor);

  FlippedOnce<false> mShuttingDown MOZ_GUARDED_BY(mMonitor);

  FlippedOnce<false> mFinalized MOZ_GUARDED_BY(mMonitor);

  uint32_t mPendingWrites MOZ_GUARDED_BY(mMonitor);

};

class OriginAttrsPatternMatchOriginSQLFunction final

    : public mozIStorageFunction {

  NS_DECL_ISUPPORTS

  NS_DECL_MOZISTORAGEFUNCTION

  explicit OriginAttrsPatternMatchOriginSQLFunction(

      OriginAttributesPattern const& aPattern)

      : mPattern(aPattern) {}

  OriginAttrsPatternMatchOriginSQLFunction() = delete;

 private:

  ~OriginAttrsPatternMatchOriginSQLFunction() = default;

  OriginAttributesPattern mPattern;

};

class PrivateBrowsingOriginSQLFunction final : public mozIStorageFunction {

  NS_DECL_ISUPPORTS

  NS_DECL_MOZISTORAGEFUNCTION

  PrivateBrowsingOriginSQLFunction() = default;

 private:

  ~PrivateBrowsingOriginSQLFunction() = default;

};

}  // namespace mozilla

#endif /* MOZILLA_IDENTITYCREDENTIALSTORAGESERVICE_H_ */