crypto.hpp

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//*********************************************************************/
// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2024 Denis Corbin
//
// 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.
//
// to contact the author, see the AUTHOR file
/*********************************************************************/
 
 
#ifndef CRYPTO_HPP
#define CRYPTO_HPP
 
extern "C"
{
 
}
 
#include "../my_config.h"
#include <string>
 
#include "datetime.hpp"
 
#include <list>
 
namespace libdar
{
 
 
 
    enum class crypto_algo
    {
    none,          
    scrambling,    
    blowfish,      
    aes256,        
    twofish256,    
    serpent256,    
    camellia256    
    };
 
 
    struct signator
    {
    enum result_t
    {
        good,         //< good signature
        bad,          //< key correct bug signature tempered
        unknown_key,  //< no key found to check the signature
        error         //< signature failed to be checked for other error
    };
    enum key_validity_t
    {
        valid,        //< the key we have is neither expired nor revoked
        expired,      //< the key we have has expired
        revoked       //< the key we have has been revoked
    };
    key_validity_t key_validity; //< validity of the key used to verify the signature
    result_t result;         //< status of the signing
    std::string fingerprint; //< fingerprint of the key
    datetime signing_date;   //< date of signature
    datetime signature_expiration_date; //< date of expiration of this signature
    bool operator < (const signator & ref) const { return fingerprint < ref.fingerprint; };
    bool operator == (const signator & ref) const { return result == ref.result && key_validity == ref.key_validity && fingerprint == ref.fingerprint && signature_expiration_date == ref.signature_expiration_date; };
    };
 
    extern std::string crypto_algo_2_string(crypto_algo algo);
 
    extern char crypto_algo_2_char(crypto_algo a);
 
    extern crypto_algo char_2_crypto_algo(char a);
 
 
    extern bool same_signatories(const std::list<signator> & a, const std::list<signator> & b);
 
 
} // end of namespace
 
#endif