| // Copyright 2019 Google LLC |
| // |
| // 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. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // The interface for stateful message authentication codes. |
| // |
| // WARNING: implementations of this interface are thread-compatible, |
| // but not thread-safe. Therefore, a streaming mac implemented with this |
| // interface is required to additionally enforce thread safety. |
| // |
| // This interface supports the implementation of both streaming |
| // and non-streaming MACs. It does not enforce thread-safety in order to avoid |
| // an unnecessary performance overhead for non-streaming MAC implementations. |
| |
| #ifndef TINK_SUBTLE_MAC_STATEFUL_MAC_H_ |
| #define TINK_SUBTLE_MAC_STATEFUL_MAC_H_ |
| |
| #include <string> |
| |
| #include "absl/strings/string_view.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace subtle { |
| |
| class StatefulMac { |
| public: |
| StatefulMac() {} |
| virtual ~StatefulMac() {} |
| |
| virtual util::Status Update(absl::string_view data) = 0; |
| virtual util::StatusOr<std::string> Finalize() = 0; |
| }; |
| |
| class StatefulMacFactory { |
| public: |
| virtual ~StatefulMacFactory() {} |
| |
| virtual util::StatusOr<std::unique_ptr<StatefulMac>> Create() const = 0; |
| }; |
| |
| } // namespace subtle |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_SUBTLE_MAC_STATEFUL_MAC_H_ |