MessageDigest.h

#ifndef TENDUKE_CRYPTO_MESSAGEDIGEST_H
#define TENDUKE_CRYPTO_MESSAGEDIGEST_H
 
#include "utl/BinaryData.h"
#include <cstddef>
#include <memory>
#include <string>
 
namespace tenduke { namespace crypto {

const std::size_t SHA256_HASH_LENGTH_BYTES = 32;

class MessageDigest
{
public:
    enum Algorithm {
        NONE,
        SHA256
    };
 
public:
    virtual ~MessageDigest() = default;

    virtual std::size_t length() const = 0;

    virtual MessageDigest * update(
            const unsigned char * message,
            std::size_t messageLength
    ) = 0;

    virtual void digestTo(unsigned char * messageDigest) = 0;

    virtual std::unique_ptr<tenduke::utl::BinaryData> digest() = 0;

    static std::string algorithmToString(enum MessageDigest::Algorithm algorithm);

    static enum MessageDigest::Algorithm stringToAlgorithm(const std::string &string);

    static enum MessageDigest::Algorithm stringToAlgorithm(const char * string);
};
 
 
}}
 
#endif // TENDUKE_CRYPTO_MESSAGEDIGEST_H