OpenSslDigest.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_OPENSSLDIGEST_H_
#define ACSDKCRYPTO_PRIVATE_OPENSSLDIGEST_H_
 
#include <memory>
 
#include <openssl/evp.h>
 
#include <acsdkCryptoInterfaces/DigestInterface.h>
#include <acsdkCryptoInterfaces/DigestType.h>
 
namespace alexaClientSDK {
namespace acsdkCrypto {
 
using alexaClientSDK::acsdkCryptoInterfaces::DigestInterface;
using alexaClientSDK::acsdkCryptoInterfaces::DigestType;
 
class OpenSslDigest : public DigestInterface {
public:
    static std::unique_ptr<OpenSslDigest> create(DigestType type) noexcept;
 
    ~OpenSslDigest() noexcept override;
    bool process(const DataBlock& data_in) noexcept override;
    bool process(DataBlock::const_iterator begin, DataBlock::const_iterator end) noexcept override;
    bool processByte(unsigned char value) noexcept override;
    bool processUInt8(uint8_t value) noexcept override;
    bool processUInt16(uint16_t value) noexcept override;
    bool processUInt32(uint32_t value) noexcept override;
    bool processUInt64(uint64_t value) noexcept override;
    bool processString(const std::string& value) noexcept override;
    bool finalize(DataBlock& digest) noexcept override;
    bool reset() noexcept override;
private:
    OpenSslDigest() noexcept;
 
    bool init(DigestType type) noexcept;
 
    const EVP_MD* m_md;
 
    EVP_MD_CTX* m_ctx;
};
 
}  // namespace acsdkCrypto
}  // namespace alexaClientSDK
 
#endif  // ACSDKCRYPTO_PRIVATE_OPENSSLDIGEST_H_