pwdChangeMessage.hpp

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#ifndef _PASSWORD_CHANGE_MESSAGE_HPP_INCLUDED
#define _PASSWORD_CHANGE_MESSAGE_HPP_INCLUDED

#include <string>
#include <cstring>
#include "crypto/md5.h"

namespace _Wolframe {
namespace AAAA {

class PasswordChangeMessage
{
private:
        enum    {
                PASSWORD_MAX_LENGTH = 64 - sizeof( unsigned char ) - MD5_DIGEST_SIZE,
                PAYLOAD_LENGTH = 64 - MD5_DIGEST_SIZE
        };

        union {
                unsigned char data[ 64 ];
                struct  {
                        unsigned char   length;
                        char            passwd[ PASSWORD_MAX_LENGTH ];
                        unsigned char   digest[ MD5_DIGEST_SIZE ];
                } parts;
        } m_message;

public:
        PasswordChangeMessage( const std::string& pwd );
        PasswordChangeMessage( const unsigned char msg[ 64 ] );

        PasswordChangeMessage()                 { memset( m_message.data, 0, 64 ); }

        ~PasswordChangeMessage()                { clear(); }

        void clear()                            { memset( m_message.data, 0, 64 ); }
        unsigned char* data()                   { return m_message.data; }
        std::size_t size() const                { return sizeof( m_message.data ); }
        std::string password() const            { return std::string( m_message.parts.passwd,
                                                                      m_message.parts.length ); }

        static bool isValid( const unsigned char buffer[ 64 ] )
                                                { return isValid( buffer, 64u ); }
        static bool isValid( const unsigned char buffer[], std::size_t size );

        bool isValid() const                    { return isValid( m_message.data, 64u ); }

        std::string toBase64( const unsigned char IV[ 16 ], const unsigned char key[ 32 ] ) const;
        bool fromBase64( const std::string& msg,
                         const unsigned char IV[ 16 ], const unsigned char key[ 32 ] );
};

}} // namespace _Wolframe::AAAA

#endif // _PASSWORD_CHANGE_MESSAGE_HPP_INCLUDED