OpenSslCryptoCodec.h

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/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file 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 ACSDKCRYPTO_PRIVATE_OPENSSLCRYPTOCODEC_H_
#define ACSDKCRYPTO_PRIVATE_OPENSSLCRYPTOCODEC_H_
 
#include <memory>
 
#include <openssl/evp.h>
 
#include <acsdkCryptoInterfaces/AlgorithmType.h>
#include <acsdkCryptoInterfaces/CryptoCodecInterface.h>
#include <acsdkCrypto/private/OpenSslTypes.h>
 
namespace alexaClientSDK {
namespace acsdkCrypto {
 
using alexaClientSDK::acsdkCryptoInterfaces::AlgorithmType;
using alexaClientSDK::acsdkCryptoInterfaces::CryptoCodecInterface;
 
class OpenSslCryptoCodec : public CryptoCodecInterface {
public:
    static std::unique_ptr<OpenSslCryptoCodec> createDecoder(AlgorithmType type) noexcept;
    static std::unique_ptr<OpenSslCryptoCodec> createEncoder(AlgorithmType type) noexcept;
 
    ~OpenSslCryptoCodec() noexcept override;
    bool init(const Key& key, const IV& iv) noexcept override;
    bool processAAD(const DataBlock& dataIn) noexcept override;
    bool processAAD(DataBlock::const_iterator dataInBegin, DataBlock::const_iterator dataInEnd) noexcept override;
    bool process(const DataBlock& dataIn, DataBlock& dataOut) noexcept override;
    bool process(
        DataBlock::const_iterator dataInBegin,
        DataBlock::const_iterator dataInEnd,
        DataBlock& dataOut) noexcept override;
    bool finalize(DataBlock& dataOut) noexcept override;
    bool getTag(Tag& tag) noexcept override;
    bool setTag(const Tag& tag) noexcept override;
 
private:
    static std::unique_ptr<OpenSslCryptoCodec> createCodec(AlgorithmType type, CodecType codecType) noexcept;
 
    OpenSslCryptoCodec(CodecType codecType, AlgorithmType algorithmType) noexcept;
 
    bool isAEADCipher() noexcept;
 
    const CodecType m_codecType;
 
    const AlgorithmType m_algorithmType;
 
    EVP_CIPHER_CTX* m_cipherCtx;
 
    bool m_initDone;
 
    const EVP_CIPHER* m_cipher;
};
 
}  // namespace acsdkCrypto
}  // namespace alexaClientSDK
 
#endif  // ACSDKCRYPTO_PRIVATE_OPENSSLCRYPTOCODEC_H_