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// 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.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef TINK_SUBTLE_STREAMING_MAC_IMPL_H_
#define TINK_SUBTLE_STREAMING_MAC_IMPL_H_
#include <memory>
#include <string>
#include <utility>
#include "tink/streaming_mac.h"
#include "tink/subtle/mac/stateful_mac.h"
namespace crypto {
namespace tink {
namespace subtle {
class StreamingMacImpl : public StreamingMac {
public:
// Constructor
explicit StreamingMacImpl(std::unique_ptr<StatefulMacFactory> mac_factory)
: mac_factory_(std::move(mac_factory)) {}
// Implement streaming mac class functions
// Returns an ComputeMacOutputStream, which when closed will return the
// message authentication code (MAC) of the data put into the stream.
util::StatusOr<std::unique_ptr<OutputStreamWithResult<std::string>>>
NewComputeMacOutputStream() const override;
// Returns an VerifyMacOutputStream which verifies if 'mac' is a correct
// message authentication code (MAC) for the data written to it.
util::StatusOr<std::unique_ptr<OutputStreamWithResult<util::Status>>>
NewVerifyMacOutputStream(const std::string& mac_value) const override;
private:
std::unique_ptr<StatefulMacFactory> mac_factory_;
};
} // namespace subtle
} // namespace tink
} // namespace crypto
#endif // TINK_SUBTLE_STREAMING_MAC_IMPL_H_
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