//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 TRANSPOS_H
#define TRANSPOS_H

/* transpos.c */
/* transposition of rows with columns of an input block */
/* Copyright 1995 Willis E. Howard, III */
/* Willis E. Howard, III  email: WEHoward@aol.com  mail: POB 1473 Elkhart, IN  46515 */

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

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

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


/* implementation specific defines */




char **
crypt_help_transpos();
/*
   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_transpos ( 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_transpos();
/*
    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_transpos( 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_transpos( char *source, char *dest );
int
validate_key(char *s);
int
setblock( void );

/* compute the integer square root of an unsigned integer */

int
isqrt(unsigned int input);

#endif // TRANSPOS_H