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// 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_BORINGSSL_H_
#define TINK_HYBRID_INTERNAL_HPKE_DECRYPT_BORINGSSL_H_
#include <memory>
#include <string>
#include <utility>
#include "absl/base/attributes.h"
#include "openssl/hpke.h"
#include "tink/hybrid/internal/hpke_key_boringssl.h"
#include "tink/util/statusor.h"
#include "proto/hpke.pb.h"
namespace crypto {
namespace tink {
namespace internal {
class ABSL_DEPRECATED("Use HpkeContext.") HpkeDecryptBoringSsl {
public:
// Sets up an HPKE recipient context. Returns an error if initialization
// fails. Otherwise, returns a unique pointer to the recipient context.
//
// `params`: HPKE parameters proto (KEM, KDF, and AEAD).
// `hpke_key`: Recipient private key.
// `encapsulated_key`: Encapsulated key.
// `context_info`: Application-specific context for key derivation.
static util::StatusOr<std::unique_ptr<HpkeDecryptBoringSsl>> New(
const google::crypto::tink::HpkeParams& params,
const HpkeKeyBoringSsl& hpke_key, absl::string_view encapsulated_key,
absl::string_view context_info);
// Performs an AEAD decryption of `ciphertext` with `associated_data`.
// Returns an error if decryption fails. Otherwise, returns the plaintext.
util::StatusOr<std::string> Decrypt(absl::string_view ciphertext,
absl::string_view associated_data);
private:
HpkeDecryptBoringSsl() {}
util::Status Init(const google::crypto::tink::HpkeParams& params,
const HpkeKeyBoringSsl& hpke_key,
absl::string_view encapsulated_key,
absl::string_view context_info);
bssl::ScopedEVP_HPKE_CTX recipient_ctx_;
};
} // namespace internal
} // namespace tink
} // namespace crypto
#endif // TINK_HYBRID_INTERNAL_HPKE_DECRYPT_BORINGSSL_H_