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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CRYPTO_AEAD_H_
#define CRYPTO_AEAD_H_
#include <stddef.h>
#include "base/strings/string_piece.h"
#include "crypto/crypto_export.h"
struct evp_aead_st;
namespace crypto {
// This class exposes the AES-128-CTR-HMAC-SHA256 AEAD, currently only
// for OpenSSL builds.
class CRYPTO_EXPORT Aead {
public:
enum AeadAlgorithm { AES_128_CTR_HMAC_SHA256 };
explicit Aead(AeadAlgorithm algorithm);
~Aead();
void Init(const std::string* key);
bool Seal(const base::StringPiece& plaintext,
const base::StringPiece& nonce,
const base::StringPiece& additional_data,
std::string* ciphertext) const;
bool Open(const base::StringPiece& ciphertext,
const base::StringPiece& nonce,
const base::StringPiece& additional_data,
std::string* plaintext) const;
size_t KeyLength() const;
size_t NonceLength() const;
private:
const std::string* key_;
const evp_aead_st* aead_;
};
} // namespace crypto
#endif // CRYPTO_ENCRYPTOR_H_
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