// Copyright 2021 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_HYBRID_INTERNAL_HPKE_DECRYPT_H_
#define TINK_HYBRID_INTERNAL_HPKE_DECRYPT_H_

#include <memory>
#include <string>
#include <utility>

#include "tink/hybrid_decrypt.h"
#include "tink/util/secret_data.h"
#include "tink/util/statusor.h"
#include "proto/hpke.pb.h"

namespace crypto {
namespace tink {

class HpkeDecrypt : public HybridDecrypt {
 public:
  // Copyable and movable.
  HpkeDecrypt(const HpkeDecrypt& other) = default;
  HpkeDecrypt& operator=(const HpkeDecrypt& other) = default;
  HpkeDecrypt(HpkeDecrypt&& other) = default;
  HpkeDecrypt& operator=(HpkeDecrypt&& other) = default;

  static crypto::tink::util::StatusOr<std::unique_ptr<HybridDecrypt>> New(
      const google::crypto::tink::HpkePrivateKey& recipient_private_key);

  crypto::tink::util::StatusOr<std::string> Decrypt(
      absl::string_view ciphertext,
      absl::string_view context_info) const override;

 private:
  HpkeDecrypt(const google::crypto::tink::HpkeParams& hpke_params,
              const util::SecretData& recipient_private_key)
      : hpke_params_(hpke_params),
        recipient_private_key_(recipient_private_key) {}

  google::crypto::tink::HpkeParams hpke_params_;
  util::SecretData recipient_private_key_;
};

}  // namespace tink
}  // namespace crypto

#endif  // TINK_HYBRID_INTERNAL_HPKE_DECRYPT_H_