md5Gcrypt.h

/*
 * This file is part of libsidplayfp, a SID player engine.
 *
 * Copyright 2013 Leandro Nini <drfiemost@users.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 
#ifndef MD5_GCRYPT_H
#define MD5_GCRYPT_H
 
#define GCRYPT_NO_MPI_MACROS
#define GCRYPT_NO_DEPRECATED
 
#include "iMd5.h"
 
#include "sidcxx11.h"
 
#include <gcrypt.h>
 
namespace libsidplayfp
{
 
class md5Gcrypt final : public iMd5
{
private:
    gcry_md_hd_t hd;
 
public:
    md5Gcrypt()
    {
        if (gcry_check_version(GCRYPT_VERSION) == 0)
            throw md5Error();
 
        // Disable secure memory.
        if (gcry_control(GCRYCTL_DISABLE_SECMEM, 0) != 0)
            throw md5Error();
 
        // Tell Libgcrypt that initialization has completed.
        if (gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0) != 0)
            throw md5Error();
 
        if (gcry_md_open(&hd, GCRY_MD_MD5, 0) != 0)
            throw md5Error();
    }
 
    ~md5Gcrypt() { gcry_md_close(hd); }
 
    void append(const void* data, int nbytes) override { gcry_md_write(hd, data, nbytes); }
 
    void finish() override { gcry_md_final(hd); }
 
    const unsigned char* getDigest() override { return gcry_md_read(hd, 0); }
 
    void reset() override { gcry_md_reset(hd); }
};
 
}
 
#endif