3des加解密 cbc方法 数据填充

#include <memory.h>
#include <windows.h>
#include <string>
#include <stdio.h>
#include<fstream>
#include<sstream>
#include<iostream>
#define final_encode_key "eff46aae1w8u59dba1192439"
#define final_encode_iv "2fd150c2"
using namespace std;
enum	
{
	encode	=	0,	//加密
	decode = 	1   //解密
};

typedef bool    (*allkey)[16][48];

const char IP_Table[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
};
// final permutation IP^-1 
const char IPR_Table[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
};
// expansion operation matrix
const char E_Table[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
};
// 32-bit permutation function P used on the output of the S-boxes 
const char P_Table[32] = {
	16, 7, 20, 21, 29, 12, 28, 17, 1,  15, 23, 26, 5,  18, 31, 10,
	2,  8, 24, 14, 32, 27, 3,  9,  19, 13, 30, 6,  22, 11, 4,  25
};

const char pc_1[56] = {
	57, 49, 41, 33, 25, 17,  9,  1, 58, 50, 42, 34, 26, 18,
	10,  2, 59, 51, 43, 35, 27, 19, 11,  3, 60, 52, 44, 36,
	63, 55, 47, 39, 31, 23, 15,  7, 62, 54, 46, 38, 30, 22,
	14,  6, 61, 53, 45, 37, 29, 21, 13,  5, 28, 20, 12,  4
};

const char pc_2[48] = {
	14, 17, 11, 24,  1,  5,  3, 28, 15,  6, 21, 10,
	23, 19, 12,  4, 26,  8, 16,  7, 27, 20, 13,  2,
	41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
	44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
};
 
const char loop[16] = {
	1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1
};

const char S[8][4][16] = {
	// S1 
	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,
	// S2 
	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,
	// S3 
	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,
	// S4 
	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,
	// S5 
	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, 10, 13,  7,  8, 15,  9, 12,  5,  6,  3,  0, 14,
	11,  8, 12,  7,  1, 14,  2, 13,  6, 15,  0,  9, 10,  4,  5,  3,
	// S6 
	12,  1, 10, 15,  9,  2,  6,  8,  0, 13,  3,  4, 14,  7,  5, 11,
	10, 15,  4,  2,  7, 12,  9,  5,  6,  1, 13, 14,  0, 11,  3,  8,
	9, 14, 15,  5,  2,  8, 12,  3,  7,  0,  4, 10,  1, 13, 11,  6,
	4,  3,  2, 12,  9,  5, 15, 10, 11, 14,  1,  7,  6,  0,  8, 13,
	// S7 
	4, 11,  2, 14, 15,  0,  8, 13,  3, 12,  9,  7,  5, 10,  6,  1,
	13,  0, 11,  7,  4,  9,  1, 10, 14,  3,  5, 12,  2, 15,  8,  6,
	1,  4, 11, 13, 12,  3,  7, 14, 10, 15,  6,  8,  0,  5,  9,  2,
	6, 11, 13,  8,  1,  4, 10,  7,  9,  5,  0, 15, 14,  2,  3, 12,
	// S8 
	13,  2,  8,  4,  6, 15, 11,  1, 10,  9,  3, 14,  5,  0, 12,  7,
	1, 15, 13,  8, 10,  3,  7,  4, 12,  5,  6, 11,  0, 14,  9,  2,
	7, 11,  4,  1,  9, 12, 14,  2,  0,  6, 10, 13, 15,  3,  5,  8,
	2,  1, 14,  7,  4, 10,  8, 13, 15, 12,  9,  0,  3,  5,  6, 11
};





void ByteToBit(bool *Out, const char *In, int bits)
{
	for(int i=0; i<bits; ++i)
		Out[i] = (In[i>>3]>>(7 - i&7)) & 1;
}


void BitToByte(char *Out, const bool *In, int bits)
{
	memset(Out, 0, bits>>3);
	for(int i=0; i<bits; ++i)
		Out[i>>3] |= In[i]<<(7 - i&7);
}


void RotateL(bool *In, int len, int loop)
{
	bool Tmp[256];

	memcpy(Tmp, In, loop);
	memcpy(In, In+loop, len-loop);
	memcpy(In+len-loop, Tmp, loop);
}


void Xor(bool *InA, const bool *InB, int len)
{
	for(int i=0; i<len; ++i)
		InA[i] ^= InB[i];
}


void Transform(bool *Out, bool *In, const char *Table, int len)
{
	bool Tmp[256];

	for(int i=0; i<len; ++i)
		Tmp[i] = In[ Table[i]-1 ];
	memcpy(Out, Tmp, len);
}


void S_func(bool Out[32], const bool In[48])
{
	for(char i=0,j,k; i<8; ++i,In+=6,Out+=4) 
	{
		j = (In[0]<<1) + In[5];
		k = (In[1]<<3) + (In[2]<<2) + (In[3]<<1) + In[4];	//组织SID下标

		for(int l=0; l<4; ++l)								//把相应4bit赋值
			Out[l] = (S[i][j][k]>>(3 - l)) & 1;
	}
}


void F_func(bool In[32], const bool Ki[48])
{
	bool MR[48];
	Transform(MR, In, E_Table, 48);
	Xor(MR, Ki, 48);
	S_func(In, MR);
	Transform(In, In, P_Table, 32);
}

void SetSubKey(allkey allkey, const char Key[8])
{
	bool K[64], *KL=&K[0], *KR=&K[28];
	ByteToBit(K, Key, 64);
	Transform(K, K, pc_1, 56);
	for(int i=0; i<16; ++i) {
		RotateL(KL, 28, loop[i]);
		RotateL(KR, 28, loop[i]);
		Transform((*allkey)[i], K, pc_2, 48);
	}
}
void DES(char Out[8], char In[8], const allkey allkey, bool Type)
{
	bool M[64], tmp[32], *Li=&M[0], *Ri=&M[32];
	ByteToBit(M, In, 64);
	Transform(M, M, IP_Table, 64);
	if( Type == encode )
	{
		for(int i=0; i<16; ++i)
		{
			memcpy(tmp, Ri, 32);		//Ri[i-1] 保存
			F_func(Ri, (*allkey)[i]);	//Ri[i-1]经过转化和SBox输出为P
			Xor(Ri, Li, 32);			//Ri[i] = P XOR Li[i-1]
			memcpy(Li, tmp, 32);		//Li[i] = Ri[i-1]
		}
	}
	else
	{
		for(int i=15; i>=0; --i) 
		{
			memcpy(tmp, Ri, 32);		//Ri[i-1] 保存
			F_func(Ri, (*allkey)[i]);	//Ri[i-1]经过转化和SBox输出为P
			Xor(Ri, Li, 32);			//Ri[i] = P XOR Li[i-1]
			memcpy(Li, tmp, 32);		//Li[i] = Ri[i-1]
		}
	}
	RotateL(M,64,32);					//Ri与Li换位重组M
	Transform(M, M, IPR_Table, 64);		//最后结果进行转化
	BitToByte(Out, M, 64);				//组织成字符
}

bool DesEncry(bool bType,char* In,char* Out,unsigned datalen,const char* Key,const unsigned char keylen, const char* Iv)
{
	//判断输入合法性
	if(!(In && Out && Key && datalen && keylen>=8))
		return false;
	//只处理8的整数倍,不足长度自己填充
	if(datalen & 0x00000007)
		return false;

	bool	m_SubKey[3][16][48];		//秘钥
	//构造并生成SubKeys
	unsigned char nKey	=	(keylen>>3)>3 ? 3: (keylen>>3);
	for(int i=0;i<nKey;i++)
	{
		SetSubKey(&m_SubKey[i],&Key[i<<3]);
	}
	char	cvec[9]	=	{0};	//扭转向量
	strcpy(cvec,Iv);
	char	cvin[9]	=	{0}; //中间变量

					//3DES CBC 3Key
		
	for(int i=0,j=datalen>>3;i<j;++i,Out+=8,In+=8)
		{
			if(bType	==	encode)
			{
				for(int j=0;j<8;++j)		//将输入与扭转变量异或
				{
					cvin[j]	=	In[j] ^ cvec[j];
				}
			}
			else
			{
				memcpy(cvin,In,8);
			}

			DES(Out,cvin,&m_SubKey[bType ? 2 : 0],bType);
			DES(Out,Out,&m_SubKey[1],!bType);
			DES(Out,Out,&m_SubKey[bType ? 0 : 2],bType);

			if(bType	==	encode)
			{
				memcpy(cvec,Out,8);			//将输出设定为扭转变量
			}
			else
			{
				for(int j=0;j<8;++j)		//将输出与扭转变量异或
				{
					Out[j]	=	Out[j] ^ cvec[j];
				}
				memcpy(cvec,cvin,8);			//将输入设定为扭转变量
			}
		}
		
	

	return true;
}



bool GetPadding(const char* In,unsigned datalen,char* Out,unsigned& padlen)
{
	int res = (datalen & 0x00000007);

	if(padlen< (datalen+8-res))
	{
		return false;
	}
	else
	{
		padlen	=	(datalen+8-res);
		memcpy(Out,In,datalen);
	}
		memset(Out+datalen,0x80,1);
		memset(Out+datalen,0x00,7-res);
	return true;
}


//计算并填充子密钥到SubKey数据中


//DES单元运算



void Char2Hex(unsigned char ch, char* szHex)
{

	unsigned char byte[2];
	byte[0] = ch/16;
	byte[1] = ch%16;
	for(int i=0; i<2; i++)
	{
		if(byte[i] >= 0 && byte[i] <= 9)
			szHex[i] = '0' + byte[i];
		else
			szHex[i] = 'A' + byte[i] - 10;
	}
	szHex[2] = 0;
}
void Hex2Char(char const* szHex, unsigned char& rch)
{
	rch = 0;
	for(int i=0; i<2; i++)
	{
		if(*(szHex + i) >='0' && *(szHex + i) <= '9')
			rch = (rch << 4) + (*(szHex + i) - '0');
		else if(*(szHex + i) >='A' && *(szHex + i) <= 'F')
			rch = (rch << 4) + (*(szHex + i) - 'A' + 10);
		else
			break;
	}

}
void CharStr2HexStr(unsigned char const* pucCharStr, char* pszHexStr, int iSize)
{

	int i;
	char szHex[3];
	pszHexStr[0] = 0;
	for(i=0; i<iSize; i++)
	{
		Char2Hex(pucCharStr[i], szHex);
		strcat(pszHexStr, szHex);
	}
}
void HexStr2CharStr(char const* pszHexStr, unsigned char* pucCharStr, int iSize)
{
	int i;
	unsigned char ch;
	for(i=0; i<iSize; i++)
	{
		Hex2Char(pszHexStr+2*i, ch);
		pucCharStr[i] = ch;
	}

}



string final_encode(string Data)
{
	
	char sIn[1024] = {0};
	char sInPad[1024] = {0};
	char sOut[1024] = {0};
	char sPOut[1024] = {0};
	char sKey[25] = {0};
	char sIv[9] = {0};
	unsigned iInPad = 512;

	strcpy(sKey,final_encode_key);
	strcpy(sIv,final_encode_iv);

	GetPadding(Data.c_str(),Data.length(),sInPad,iInPad);

	DesEncry(encode,sInPad,sOut,iInPad,sKey,strlen(sKey),sIv);

	CharStr2HexStr((const unsigned char*)sOut,sPOut,iInPad);

	return sPOut;
}


string final_decode(string Data)
{
	
	char sOut[1024] = {0};
	unsigned char sPin[1024] = {0};
	char sKey[25] = {0};
	char sIv[9] = {0};
	unsigned iInPad = Data.length()/2;

	strcpy(sKey,final_encode_key);
	strcpy(sIv,final_encode_iv);

	HexStr2CharStr(Data.c_str(),sPin,iInPad);

	DesEncry(decode,(char *)sPin,sOut,iInPad,sKey,strlen(sKey),sIv);

	string temp_result =sOut;
	temp_result = temp_result.substr(0,temp_result.length()-int(temp_result[temp_result.length()-1]));
	return temp_result;
}
int main(){
	string file;
	ifstream input;
	input.open("./test.cpp");
	stringstream input1;
	input1<<input.rdbuf();
	input.close();
	file=input1.str(); 
	cout<<final_encode(file)<<endl;
	cout<<final_decode("825501E8726FF5F2");
}

参考了网上部分代码,但是基本没有可以直接用的,我传的自己改改可以直接用

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