/*?Note:Your?choice?is?C?IDE?*/
#include?“stdio.h“
#include?“string.h“
#include?“time.h“
#include?“stdlib.h“
#include?“conio.h“
#define?uchar?unsigned?char
#define?PLAIN_FILE_OPEN_ERROR?-1;
#define?KEY_FILE_OPEN_ERROR?-2;
#define?CIPHER_FILE_OPEN_ERROR?-3;

/****************************************************************************
******************************明文轉換聲明部分*******************************/
//IP1置換表
int???IP_1[64]={58?50?42?34?26?18?10?2
	????????????60?52?44?36?28?20?12?4
	????????????62?54?46?38?30?22?14?6
	????????????64?56?48?40?32?24?16?8
	????????????57?49?41?33?25?17??9?1
	????????????59?51?43?35?27?19?11?3
	????????????61?53?45?37?29?21?13?5
	????????????63?55?47?39?31?23?15?7};
//IP2逆置換表
int???IP_2[64]={40??8?48?16?56?24?64?32
	????????????39??7?47?15?55?23?63?31
	????????????38??6?46?14?54?22?62?30
	????????????37??5?45?13?53?21?61?29
	????????????36??4?44?12?52?20?60?28?
	????????????35??3?43?11?51?19?59?27
	????????????34??2?42?10?50?18?58?26
	????????????33??1?41??9?49?17?57?25};
//E擴展置換表
int???E_case[48]={32??1??2??3??4??5??
	???????????????4??5??6??7??8??9
	???????????????8??9?10?11?12?13
	??????????????12?13?14?15?16?17
	??????????????16?17?18?19?20?21
	??????????????20?21?22?23?24?25
	??????????????24?25?26?27?28?29
	??????????????28?29?30?31?32?1};
//S盒壓縮
int???S1[4][16]={14??4?13??1??2?15?11??8??3?10??6?12??5??9??0??7
	??????????????0?15??7??4?14??2?13??1?10??6?12?11??9??5??3??8
	??????????????4??1?14??8?13??6??2?11?15?12??9??7??3?10??5??0
	?????????????15?12??8??2??4??9??1??7??5?11??3?14?10??0??6?13};
?
int???S2[4][16]={15??1??8?14??6?11??3??4??9??7??2?13?12??0??5?10
	??????????????3?13??4??7?15??2??8?14?12??0??1?10??6??9?11??5
	??????????????0?14??7?11?10??4?13??1??5??8?12??6??9??3??2?15
	?????????????13??8?10??1??3?15??4??2?11??6??7?12??0??5?14??9};

int???S3[4][16]={10??0??9?14??6??3?15??5??1?13?12??7?11??4??2??8
	?????????????13??7??0??9??3??4??6?10??2??8??5?14?12?11?15??1
	?????????????13??6??4??9??8?15??3??0?11??1??2?12??5?10?14??7
	??????????????1?10?13??0??6??9??8??7??4?15?14??3?11??5??2?12};
?
int???S4[4][16]={?7?13?14??3??0??6??9?10??1??2??8??5?11?12??4?15
	?????????????13??8?11??5??6?15??0??3??4??7??2?12??1?10?14??9
	?????????????10??6??9??0?12?11??7?13?15??1??3?14??5??2??8??4
	??????????????3?15??0??6?10??1?13??8??9??4??5?11?12??7??2?14};

int???S5[4][16]={?2?12??4??1??7?10?11??6??8??5??3?15?13??0?14??9
	?????????????14?11??2?12??4??7?13??1??5??0?15?10??3??9??8??6
	??????????????4??2??1?11

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????????24??2017-06-08?18:00??cipher.txt
?????文件???????20617??2017-06-08?17:50??DES.c
?????文件??????208972??2017-04-23?15:12??DES.exe
?????文件???????????3??2017-04-23?16:23??key.txt
?????文件??????????22??2017-06-08?17:59??plain.txt