//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 3 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, see <http://www.gnu.org/licenses/>
#ifndef BLOWFISH_H
#define BLOWFISH_H

#define MAXKEYBYTES 56          /* 448 bits */
#define little_endian 1              /* Eg: Intel */
// #define big_endian 1            /* Eg: Motorola */

short opensubkeyfile(void);
unsigned long F(unsigned long x);
void Blowfish_encipher(unsigned long *xl, unsigned long *xr);
void Blowfish_decipher(unsigned long *xl, unsigned long *xr);
short InitializeBlowfish (char *, short);

unsigned int crc (unsigned char , unsigned int );


char ** crypt_help_blowfish ();
/*
   crypt_key:
   Get the key from the passed string (that may be a file name in some
   implementations) or from a key file name.  Return 0 on success but
   exit on error.
*/

int crypt_key_blowfish (int key_type, char *key_text);
/*
   crypt_key_erase:
   If a local copy of the key has been made, erase it from memory.
   This increases security that the key can not be obtained from
   an examination of memory.
*/

void crypt_key_erase_blowfish ();
/*
    crypt_select:
    If encryption and decryption require different ciphers,
    this routine defines the direction.  Valid choices are
    ENCRYPTION_SELECT and DECRYPTION_SELECT.
*/

int crypt_select_blowfish (int selection);
/*
    crypt_file:
    encrypt or decrypt the source to the destination file.
    Do not exit from this routine.  Return 0 on success
    and return 1 on error.  Use an fprintf(stderr, ... ) to
    report the nature of the error and close any open files.
    This allows the main routine to do some cleanup before
    exiting.
*/

int crypt_file_blowfish (char *source, char *dest);
short opensubkeyfile (void);                            /* read only */
unsigned long F (unsigned long x);
void Blowfish_encipher (unsigned long *xl, unsigned long *xr);
void Blowfish_decipher (unsigned long *xl, unsigned long *xr);
short InitializeBlowfish (char key[], short keybytes);
/* crc from PGP - update 16-bit CRC:  X^16 + X^12 + X^5 + 1 */

unsigned int crc (unsigned char nuevo, unsigned int value);

#endif // BLOWFISH_H