WinCNGHash.h

#ifndef TENDUKE_CRYPTO_WIN_CNG_WINCNGHASH_H
#define TENDUKE_CRYPTO_WIN_CNG_WINCNGHASH_H
 
#include "crypto/msgauthn/CryptographicHash.h"
#include "utl/FixedSizeBinaryData.h"
 
#include <memory>
 
#include <windows.h>
#include <bcrypt.h>
 
namespace tenduke { namespace crypto { namespace win { namespace cng {
 

class WinCNGHash : public ::tenduke::crypto::CryptographicHash
{
public:
    explicit WinCNGHash(::BCRYPT_ALG_HANDLE algorithm);
    ~WinCNGHash() override;
 
// ::tenduke::crypto::MessageDigest implementation
public:
    std::size_t length() const override;
    MessageDigest * update(
            const unsigned char * message,
            std::size_t messageLength
    ) override;
    void digestTo(unsigned char * digest) override;
    std::unique_ptr<tenduke::utl::BinaryData> digest() override;
 
private:
    ::BCRYPT_HASH_HANDLE handle;
    size_t digestLength;
    std::unique_ptr<::tenduke::utl::FixedSizeBinaryData> digestBuffer;
};
 
}}}}
 
#endif // TENDUKE_CRYPTO_WIN_CNG_WINCNGHASH_H