| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| #ifndef TINK_CORE_PRIVATE_KEY_MANAGER_IMPL_H_ |
| #define TINK_CORE_PRIVATE_KEY_MANAGER_IMPL_H_ |
| |
| #include "tink/core/key_manager_impl.h" |
| #include "tink/core/private_key_type_manager.h" |
| #include "tink/key_manager.h" |
| #include "tink/util/validation.h" |
| namespace crypto { |
| namespace tink { |
| namespace internal { |
| |
| // An implementation of a PrivateKeyFactory given a corresponding internal |
| // private key manager and an internal (public) key manager. |
| // The template arguments PrivatePrimitivesList and PublicPrimitivesList should |
| // be of type List<Primitives...>. The assumption is that the given pointers in |
| // the constructor are of type |
| // PrivateKeyTypeManager<PrivateKeyProto, PrivateKeyFormatProto, |
| // PublicKeyProto, PrivatePrimitivesList> |
| // and |
| // KeyTypeManager<PublicKeyProto, void, PublicPrimitivesList>. |
| template <class PrivateKeyProto, class PrivateKeyFormatProto, |
| class PublicKeyProto, class PrivatePrimitivesList, |
| class PublicPrimitivesList> |
| class PrivateKeyFactoryImpl : public PrivateKeyFactory { |
| public: |
| PrivateKeyFactoryImpl( |
| PrivateKeyTypeManager<PrivateKeyProto, PrivateKeyFormatProto, |
| PublicKeyProto, PrivatePrimitivesList>* |
| private_key_manager, |
| KeyTypeManager<PublicKeyProto, void, PublicPrimitivesList>* |
| public_key_manager) |
| : key_factory_impl_(private_key_manager), |
| private_key_manager_(private_key_manager), |
| public_key_type_(public_key_manager->get_key_type()), |
| public_key_material_type_(public_key_manager->key_material_type()) {} |
| |
| crypto::tink::util::StatusOr<std::unique_ptr<portable_proto::MessageLite>> |
| NewKey(const portable_proto::MessageLite& key_format) const override { |
| return key_factory_impl_.NewKey(key_format); |
| } |
| |
| crypto::tink::util::StatusOr<std::unique_ptr<portable_proto::MessageLite>> |
| NewKey(absl::string_view serialized_key_format) const override { |
| return key_factory_impl_.NewKey(serialized_key_format); |
| } |
| |
| crypto::tink::util::StatusOr<std::unique_ptr<google::crypto::tink::KeyData>> |
| NewKeyData(absl::string_view serialized_key_format) const override { |
| return key_factory_impl_.NewKeyData(serialized_key_format); |
| } |
| |
| crypto::tink::util::StatusOr<std::unique_ptr<google::crypto::tink::KeyData>> |
| GetPublicKeyData(absl::string_view serialized_private_key) const override { |
| PrivateKeyProto private_key; |
| if (!private_key.ParseFromString(std::string(serialized_private_key))) { |
| return crypto::tink::util::Status( |
| util::error::INVALID_ARGUMENT, |
| absl::StrCat("Could not parse the passed string as proto '", |
| PrivateKeyProto().GetTypeName(), "'.")); |
| } |
| auto validation = private_key_manager_->ValidateKey(private_key); |
| if (!validation.ok()) return validation; |
| auto key_data = absl::make_unique<google::crypto::tink::KeyData>(); |
| util::StatusOr<PublicKeyProto> public_key_result = |
| private_key_manager_->GetPublicKey(private_key); |
| if (!public_key_result.ok()) return public_key_result.status(); |
| key_data->set_type_url(public_key_type_); |
| key_data->set_value(public_key_result.ValueOrDie().SerializeAsString()); |
| key_data->set_key_material_type(public_key_material_type_); |
| return std::move(key_data); |
| } |
| |
| private: |
| // We create a key_factory_impl_ as a member, instead of using virtual |
| // inheritance to have it as a sub class. This means we have to forward the |
| // calls to NewKeyData as above, but developers do not have to know about |
| // virtual inheritance. |
| KeyFactoryImpl<KeyTypeManager<PrivateKeyProto, PrivateKeyFormatProto, |
| PrivatePrimitivesList>> |
| key_factory_impl_; |
| PrivateKeyTypeManager<PrivateKeyProto, PrivateKeyFormatProto, PublicKeyProto, |
| PrivatePrimitivesList>* private_key_manager_; |
| const std::string public_key_type_; |
| google::crypto::tink::KeyData::KeyMaterialType public_key_material_type_; |
| }; |
| |
| template <class Primitive, class PrivateKeyTypeManager, |
| class PublicKeyTypeManager> |
| class PrivateKeyManagerImpl; |
| |
| template <class Primitive, class PrivateKeyProto, class KeyFormatProto, |
| class PublicKeyProto, class PrivatePrimitivesList, |
| class PublicPrimitivesList> |
| class PrivateKeyManagerImpl< |
| Primitive, |
| PrivateKeyTypeManager<PrivateKeyProto, KeyFormatProto, PublicKeyProto, |
| PrivatePrimitivesList>, |
| KeyTypeManager<PublicKeyProto, void, PublicPrimitivesList>> |
| : public KeyManagerImpl<Primitive, |
| KeyTypeManager<PrivateKeyProto, KeyFormatProto, |
| PrivatePrimitivesList>> { |
| public: |
| explicit PrivateKeyManagerImpl( |
| PrivateKeyTypeManager<PrivateKeyProto, KeyFormatProto, PublicKeyProto, |
| PrivatePrimitivesList>* private_key_manager, |
| KeyTypeManager<PublicKeyProto, void, PublicPrimitivesList>* |
| public_key_manager) |
| : KeyManagerImpl<Primitive, |
| KeyTypeManager<PrivateKeyProto, KeyFormatProto, |
| PrivatePrimitivesList>>( |
| private_key_manager), |
| private_key_factory_(private_key_manager, public_key_manager) {} |
| |
| const PrivateKeyFactory& get_key_factory() const override { |
| return private_key_factory_; |
| } |
| |
| private: |
| const PrivateKeyFactoryImpl<PrivateKeyProto, KeyFormatProto, PublicKeyProto, |
| PrivatePrimitivesList, PublicPrimitivesList> |
| private_key_factory_; |
| }; |
| |
| // Helper function to create a KeyManager<Primitive> for a |
| // PrivateKeyTypeManager. Using this, all template arguments except the |
| // first one can be infered. Example: |
| // std::unique_ptr<KeyManager<PublicKeySign>> km = |
| // MakePrivateKeyManager<PublicKeySign>(internal_private_km, |
| // internal_public_km); |
| // |
| // When creating a KeyManager like this, the passed in "private_key_manager" |
| // must outlive the constructed KeyManager. The passed in "public_key_manager" |
| // however must only be valid during construction of the KeyManager. |
| template <class Primitive, class PrivateKeyProto, class KeyFormatProto, |
| class PublicKeyProto, class PrivatePrimitivesList, |
| class PublicPrimitivesList> |
| std::unique_ptr<KeyManager<Primitive>> MakePrivateKeyManager( |
| PrivateKeyTypeManager<PrivateKeyProto, KeyFormatProto, PublicKeyProto, |
| PrivatePrimitivesList>* private_key_manager, |
| KeyTypeManager<PublicKeyProto, void, PublicPrimitivesList>* |
| public_key_manager) { |
| return absl::make_unique<PrivateKeyManagerImpl< |
| Primitive, |
| PrivateKeyTypeManager<PrivateKeyProto, KeyFormatProto, PublicKeyProto, |
| PrivatePrimitivesList>, |
| KeyTypeManager<PublicKeyProto, void, PublicPrimitivesList>>>( |
| private_key_manager, public_key_manager); |
| } |
| |
| } // namespace internal |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_CORE_PRIVATE_KEY_MANAGER_IMPL_H_ |