#include?“DESEncryptionHeader.h“

//運用密鑰K對明文二元串x加密成y
void?DES_Encrypt（char*?xchar*?Kchar*?&ybool?new_flag）
{
	if（strlen（x）!=L*M||strlen（K）!=L*M+Nr*L）?return;

	if（new_flag）??y=（char*）malloc（sizeof（char）*（L*M+1））;

	
	char*?w;
	char*?u;
	char*?v;
	char*?k;
	w=bits2string（x）;
	for（int?r=1;r	{		
		k=getKey（Kr）;//密鑰
		u=getU（wk）;//異或
		v=getV（u）;//S盒
		w=getW（v）;//P盒
	}

	k=getKey（KNr）;//密鑰
	u=getU（wk）;//異或
	v=getV（u）;//S盒
	//P盒省略，w=v
	k=getKey（KNr+1）;//密鑰	
	y=getU（vk）;//異或
}
//二元串轉化為可按位運算的string
//此例中輸入長度16，輸出長度4
char*?bits2string（char*?x）
{
	char?*result=（char*）malloc（sizeof（char）*（M+1））;
	//為返回結果分配空間

	for（int?i=0;i	{???
		int?sum=0;
		for（int?j=0;j		{
		int?a=x[i+j]-‘0‘;
		sum=sum*2+a;
		}
		result[i/L]=sum+‘0‘;
	}
	result[M]=‘\0‘;

	return?result;
}
//string轉化為二元串
//輸入長度為4，輸出長度為16
char*?string2bits（char*?v）
{
	char?*result=（char*）malloc（sizeof（char）*（L*M+1））;
	//為返回結果分配空間

	for（int?i=0;i	{
	int?a=v[i]-‘0‘;
	for（int?j=0;j	{	
		result[L-1-j+L*i]=a%2+‘0‘;
		a=a/2;
	}
	}
	result[L*M]=‘\0‘;

	return?result;
}

//由輸入的關于密鑰的字符串獲得第i輪的密鑰
char*?getKey（char*?Kint?i）
{
	if（strlen（K）!=L*M+L*Nr||K==NULL）??return?NULL;

	char?*result=（char*）malloc（sizeof（char）*（M+1））;
	//為返回結果分配空間

	for（int?j=（i-1）*L;j	{
	??int?sum=0;
	??for（int?k=0;k<4;k++）
	??{
		??int?a=K[j+k]-‘0‘;
		??sum=sum*2+a;
	??}
	??result[（j-（i-1）*L）/L]=sum+‘0‘;
	}

	result[M]=‘\0‘;

	return?result;
}
//w與密鑰異或
char*?getU（char*?wchar*?k）
{
	if（strlen（k）!=L||strlen（w）!=L||k==NULL||w==NULL）??return?NULL;

	char?*result=（char*）malloc（sizeof（char）*（M+1））;
	//為返回結果分配空間

	for（int?i=0;i	{???
		int?W=w[i]-‘0‘;
		int?K=k[i]-‘0‘;
		result[i]=W^K+‘0‘;
	}
	result[M]=‘\0‘;

	return?result;
}
//S盒代換
char*?getV（char*?u）
{
	if（strlen（u）!=L||u==NULL）??return?NULL;

	char?*result=（char*）malloc（sizeof（char）*（M+1））;
	//為返回結果分配空間

	for（int?i=0;i	{???
		int?U=u[i]-‘0‘;
		result[i]=S[U]+‘0‘;
	}
	result[M]=‘\0‘;

	return?result;
}
//P盒置換
char*?getW（char*?v）
{
	if（strlen（v）!=L||v==NULL）??return?NULL;

????char*?s=string2bits（v）;
	char*?sp=（char*）malloc（sizeof（char）*（M*L+1））;
	for（int?i=0;i	{???		
	sp[P[i]-1]=s[i];
	}
	sp[L*M]=‘\0‘;

	return?bits2string（sp）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????52736??2012-11-05?16:24??DES_Simulation\Debug\DES_Simulation.exe

?????文件?????356336??2012-11-05?16:24??DES_Simulation\Debug\DES_Simulation.ilk

?????文件?????502784??2012-11-05?16:24??DES_Simulation\Debug\DES_Simulation.pdb

?????文件???????3232??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\cl.command.1.tlog

?????文件??????71434??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\CL.read.1.tlog

?????文件???????9310??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\CL.write.1.tlog

?????文件??????30265??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\DESEncryptionHeader.obj

?????文件??????22271??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\DESHeader.obj

?????文件????????381??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\DES_Simulation.exe.intermediate.manifest

?????文件?????????63??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\DES_Simulation.lastbuildstate

?????文件??????12657??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\DES_Simulation.log

?????文件??????32559??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\DifferentialAttackHeader.obj

?????文件??????33531??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\LinerApproximationHeader.obj

?????文件???????3438??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\link.command.1.tlog

?????文件???????3938??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\link.read.1.tlog

?????文件???????1356??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\link.write.1.tlog

?????文件??????62471??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\main.obj

?????文件????????516??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\mt.command.1.tlog

?????文件????????902??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\mt.read.1.tlog

?????文件????????326??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\mt.write.1.tlog

?????文件?????527360??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\vc100.idb

?????文件?????118784??2012-11-05?16:24??DES_Simulation\DES_Simulation\Debug\vc100.pdb

?????文件???????2508??2012-10-28?00:08??DES_Simulation\DES_Simulation\DESEncryptionHeader.cpp

?????文件????????363??2012-10-25?12:16??DES_Simulation\DES_Simulation\DESEncryptionHeader.h

?????文件????????540??2012-10-27?14:20??DES_Simulation\DES_Simulation\DESHeader.cpp

?????文件????????392??2012-11-05?16:24??DES_Simulation\DES_Simulation\DESHeader.h

?????文件???????3675??2012-10-27?14:09??DES_Simulation\DES_Simulation\DES_Simulation.vcxproj

?????文件???????1789??2012-10-27?14:09??DES_Simulation\DES_Simulation\DES_Simulation.vcxproj.filters

?????文件????????143??2012-10-24?01:42??DES_Simulation\DES_Simulation\DES_Simulation.vcxproj.user

?????文件???????2520??2012-10-28?00:25??DES_Simulation\DES_Simulation\DifferentialAttackHeader.cpp

............此處省略17個文件信息