Crypt.h

/*
** libutil++
** $Id: Crypt.h 1653 2016-02-28 19:54:59Z sella $
** Copyright (c) 2011-2016 Digital Genesis, LLC. All Rights Reserved.
** Released under the LGPL Version 2.1 License.
** http://www.digitalgenesis.com
*/

#ifndef __libutilxx__sella__util__Crypt_H__
#define __libutilxx__sella__util__Crypt_H__

#include "../../common.h"

#ifndef SKIP_CRYPT

#include <mcrypt.h>
#include <string>

#define CRYPT_ALGO_DEF "twofish"
#define CRYPT_MODE_DEF "cfb" /* Use a block mode */
#define CRYPT_KEYLEN_DEF 256
#define CRYPT_PASSWORD_DEF "q2enL5bsEmiP2laul8Lsii2uri7nMet3r4Ier7eSto3iDed7itr3llYSts9ni03nOnSlM"
#define CRYPT_SALT_DEF "Vine5l7xIc"
#define CRYPT_SERIAL_XOR 0xA5B65A69

namespace sella {
        namespace util {
                class Crypt;
        }
}

class sella::util::Crypt {
        public:
                Crypt(const char *algo = CRYPT_ALGO_DEF, const char *mode = CRYPT_MODE_DEF, int bits = CRYPT_KEYLEN_DEF, uint32_t seed = 0);
                Crypt(const Crypt &other);
                virtual ~Crypt();
                Crypt& operator=(const Crypt &other) throw ();

                void clear(void);

                void setSeed(uint32_t seed);
                void setFlipSeed(uint32_t seed, uint32_t pattern = CRYPT_SERIAL_XOR);
                uint32_t getSeed(void) const;

                bool setPassword(const char *password = CRYPT_PASSWORD_DEF, const char *salt = CRYPT_SALT_DEF);
                const char* getPassword(void);
                const unsigned char* getKey(void);

                void setKeyLen(int bits);
                int getKeyLen(void) const;

                bool encrypt(char *plainetext, int len);
                bool decrypt(char *ciphertext, int len);
                bool check(const char *ciphertext, int len);

        protected:
        private:
                bool initialize(void);
                bool deinitialize(void);
                bool generateIV(void);

                bool init;
                MCRYPT td;
                uint32_t seed;
                char *password;
                char *salt;
                unsigned char *key;
                unsigned char *iv;
                int keylen;

                std::string algo;
                std::string mode;
};

#endif
#endif

/*
** vim: noet ts=3 sw=3
*/