| // Copyright 2014 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 SYNC_ENGINE_CRYPTOGRAPHER_PROVIDER_H_ |
| #define SYNC_ENGINE_CRYPTOGRAPHER_PROVIDER_H_ |
| |
| #include "base/memory/scoped_ptr.h" |
| #include "sync/base/sync_export.h" |
| |
| namespace syncer { |
| |
| class Cryptographer; |
| class ScopedCryptographerRef; |
| class ScopedCryptographerInternal; |
| |
| // An interface for providing clients with a ScopedCryptographerRef. |
| // |
| // Used to expose the syncable::Directory's cryptographer to clients that |
| // would otherwise not have access to the Directory. |
| class SYNC_EXPORT_PRIVATE CryptographerProvider { |
| public: |
| CryptographerProvider(); |
| virtual ~CryptographerProvider(); |
| |
| virtual bool InitScopedCryptographerRef(ScopedCryptographerRef* scoped) = 0; |
| }; |
| |
| // A concrete class representing a reference to a cryptographer. |
| // |
| // Access to the cryptographer is lost when this class goes out of scope. |
| class SYNC_EXPORT_PRIVATE ScopedCryptographerRef { |
| public: |
| ScopedCryptographerRef(); |
| ~ScopedCryptographerRef(); |
| |
| bool Initialize(ScopedCryptographerInternal* impl); |
| bool IsValid() const; |
| Cryptographer* Get() const; |
| |
| private: |
| scoped_ptr<ScopedCryptographerInternal> scoped_cryptographer_internal_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedCryptographerRef); |
| }; |
| |
| // An interface class used in the implementation of the ScopedCryptographerRef. |
| // |
| // We use this class to allow different implementations of |
| // CryptographerProvider to implement InitScopedCryptographer in different |
| // ways. The ScopedCryptographerRef itself must be stack-allocated, so it |
| // can't vary depending on which kind of CryptographerProvider is used to |
| // intialize it. |
| class SYNC_EXPORT_PRIVATE ScopedCryptographerInternal { |
| public: |
| ScopedCryptographerInternal(); |
| virtual ~ScopedCryptographerInternal(); |
| |
| virtual Cryptographer* Get() const = 0; |
| }; |
| |
| } // namespace syncer |
| |
| #endif // SYNC_ENGINE_CRYPTOGRAPHER_PROVIDER_H_ |