| // 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 <string> |
| |
| #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. |
| 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_AEAD_H_ |