//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 ENIGMA_H
#define ENIGMA_H

/* enigma.c */
/* enigma encryption cipher from Henry Tieman implementation */
/* Unless otherwise noted Copyright 1995 Willis E. Howard, III */
/* Willis E. Howard, III  email: WEHoward@aol.com  mail: POB 1473 Elkhart, IN  46515 */

/* under MSDOS, NMAKE /F ENIGMA.MAK all clean */

#include <stdio.h>
#include <stdlib.h>
#include "crypt.h"

/*
   cipher_doc:
   This array of strings must have two sections:
   CIPHER that describes the cipher used and
   KEY that describes how the key is defined and entered.
*/

char ** crypt_help_enigma ();

/*
   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_enigma (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 for the key can not be obtained from
   an examination of memory.
*/

void crypt_key_erase_enigma ();

/*
    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_enigma (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_enigma (char *source, char *dest);
/*
 * init_mach - set up data according to the input data
 */

static void init_mach_enigma (void);
/*
 *  encipher - c implementation of the enigma cipher function
 */

static int encipher_enigma (int c);

#endif // ENIGMA_H