//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 OTPF_H
#define OTPF_H

/* otpf.c */
/* XOR with a one time pad file having an offset to start of file. */
/* Copyright 1995 Willis E. Howard, III */
/* Willis E. Howard, III  email: WEHoward@aol.com  mail: POB 1473 Elkhart, IN  46515 */

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

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

#include <string.h>
#include <ctype.h>
#include <windows.h>

/*
  This routine uses the common interface to CRYPT.C.
  Generally, the name of this module becomes the name
  of the executable file.
*/

//static int key_defined = 0;                      /* Set to 1 after a valid key has been defined */
//static int encrypt_or_decrypt_khufu = ENCRYPTION_SELECT;
//static char key_string[257];

/* module specific */

//FILE *otpfile;
//static char otp_name[80];
//static long offset;
//int validate_string (char *);
//static char key_file_name[80];
//void key_update (void);
//long check_key (char *, long);

char ** crypt_help_otpf ();

/*
   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 and
   non-zero on error.
*/

int crypt_key_otpf (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_otpf ();
/*
    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_otpf (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_otpf (char *source, char *dest);
/* strictly syntax check:  name and number */

static int validate_string (char *s);

void key_update (void);
long check_key (char *filename, long start);


#endif // OTPF_H