一、理论知识：
1、虚函数和多态性使成员函数根据调用对象的类型产生不同的动作。
2、多态性特别适合于实现分层结构的软件系统，便于对问题抽象时 定义共性，实现时定义区别
3、面向抽象类编程（面向接口编程）是项目开发中重要技能之一。
4、抽象类在多继承中的应用。
C++没有Java中的接口概念，抽象类可以模拟Java中的接口类（接口和协议）
二、
案例：socket库c++模型设计和实现
企业信息系统框架集成第三方产品
案例背景：一般的企业信息系统都有成熟的框架。软件框架一般不发生变化，能自由的集成第三方厂商的产品。
案例需求：请你在企业信息系统框架中集成第三方厂商的Socket通信产品和第三方厂商加密产品。
第三方厂商的Socket通信产品：完成两点之间的通信；
第三方厂商加密产品：完成数据发送时加密；数据解密时解密。
案例要求： 1）能支持多个厂商的Socket通信产品入围
2）能支持多个第三方厂商加密产品的入围
3）企业信息系统框架不轻易发生框架
需求实现
思考1：企业信息系统框架、第三方产品如何分层
思考2：企业信息系统框架，如何自由集成第三方产品
（软件设计：模块要求松、接口要求紧）
思考3：软件分成以后，开发企业信息系统框架的程序员，应该做什么？
第三方产品入围应该做什么？
编码实现
分析有多少个类 CSocketProtocol CSckFactoryImp1 CSckFactoryImp2
CEncDesProtocol HwEncdes ciscoEncdes
1、 定义 CSocketProtocol 抽象类
2、 编写框架函数
3、 编写框架测试函数
4、 厂商1（CSckFactoryImp1）实现CSocketProtocol、厂商2（CSckFactoryImp1）实现CSocketProtoco
5、 抽象加密接口（CEncDesProtocol）、加密厂商1(CHwImp)、加密厂商2(CCiscoImp))，集成实现业务模型
6、 框架（c语言函数方式，框架函数；c++类方式，框架类）
几个重要的面向对象思想
继承-组合（强弱） //多继承和组合。
注入
控制反转 IOC
MVC
面向对象思想扩展aop思想
aop思想是对继承编程思想的有力的补充
三、具体代码：
1、mainclass.cpp 中的代码：
（1）开头定义的代码：
using namespace std;
#include "CSocketProtocol.h"
#include "CSckFactoryImp1.h"
#include "CSckFactoryImp2.h"
#include "CEncDesProtocol.h"
#include "HwEncDec.h"（2）实现图中的整个框架，所有接入的厂商都得按照这个标准来制作：
// 面向抽象类编程,框架实现完毕
int SckSendAndRec01(CSocketProtocol *sp, unsigned char *in, int inlen, unsigned char *out, int *outlen)
{
int ret = 0;
ret = sp->cltSocketInit(); //数据初始化
if (ret != 0) //这里加上判断，初始化不成就直接跳到最后
{
goto End;
}
ret = sp->cltSocketSend(in, inlen); //数据的发送 参数内存的首地址加一个长度
if (ret != 0)
{
goto End;
}
ret = sp->cltSocketRev(out, outlen); //接收报文 ，传来的首地址，还有长度
if (ret != 0)
{
goto End;
}
End: //接收goto 然后统一释放资源
ret = sp->cltSocketDestory(); // 释放
return 0;
}（3）第二个框架，还包括有进行加密解密的过程：
// 面向抽象类编程,框架实现完毕 ,发送的时候实现加解密
int SckSendAndRec_EncDec(CSocketProtocol *sp,CEncDesProtocol * ed , unsigned char *in, int inlen, unsigned char *out, int *outlen)
{
int ret = 0;
unsigned char data[4096]; // 分配接收的数据的 内存
int datalen = 0; //分配接收的数据的 长度
ret = sp->cltSocketInit(); //数据初始化
if (ret != 0) //这里加上判断
{
goto End;
}
// data回来之后就是密文
ret = ed->EncData( in , inlen , data , &datalen ); // 发送之前对明文进行加密
if (ret != 0) //这里加上判断
{
goto End;
}
// 加 data 密文发送出去
ret = sp->cltSocketSend(data, datalen); //数据的发送 参数内存的首地址加一个长度
if (ret != 0)
{
goto End;
}
// 收到的数据时密文，我们要对其进行解密
ret = ed->DecData( data, datalen, out, outlen);
if (ret != 0)
{
goto End;
}
ret = sp->cltSocketRev(data, &datalen ); //接收报文 ，传来的首地址，还有长度
if (ret != 0)
{
goto End;
}
End: //接收goto 然后统一释放资源
ret = sp->cltSocketDestory(); // 释放
return 0;
}（4）主函数 void main（）
//主函数
int main01()
{
int ret = 0;
unsigned char in[4096];
int inlen;
unsigned char out[4096];
int outlen = 0;
strcpy((char *)in, "aadddddddddddaaaaaaaaaaa");
inlen = 9;
CSocketProtocol *sp = NULL; // 定义一个父类指针
sp = new CSckFactoryImp1; // 进行集成测试了' new了一个产品，构造函数
// 可以写上 CSckFactoryImp2 ，然后就可以执行第二个厂商的案例
ret = SckSendAndRec01(sp, in, inlen, out, &outlen); // 发生多态的效果
if (ret != 0)
{
printf("func SckSendAndRec() err:%d \n", ret);
return ret;
}
delete sp; //想通过父类指针 释放所有的子类对象的资源 ..
// 第二家厂商调用
sp = new CSckFactoryImp2;
ret = SckSendAndRec01(sp, in, inlen, out, &outlen);
if (ret != 0)
{
printf("func SckSendAndRec() err:%d \n", ret);
return ret;
}
//delete sp; //想通过父类指针 释放所有的子类对象的资源 ..
// 加密解密的协议
CEncDesProtocol *ed = NULL;
ed = new HwEncDec;
ret = SckSendAndRec_EncDec(sp, ed , in, inlen, out, &outlen);
if (ret != 0)
{
printf("func SckSendAndRec() err:%d \n", ret);
return ret;
}
delete ed;
cout << "hello" << endl;
system("pause");
return ret;
}2、CSocketProtocol.h 是一个父类，定义了一个抽象：使其成为其他函数可以调用的接口。
#pragma once
#include <iostream>
using namespace std;
class CSocketProtocol // 抽象类
{
public:
CSocketProtocol()
{
;
}
//由于想通过父类指针 释放所有的子类对象的资源，所以一定要为 虚函数
virtual ~CSocketProtocol() //虚析构函数的细节
{
;
}
//客户端初始化 获取handle上下
virtual int cltSocketInit( /*out*/) = 0;
//客户端发报文
virtual int cltSocketSend( unsigned char *buf /*in*/, int buflen /*in*/) = 0;
//客户端收报文
virtual int cltSocketRev( unsigned char *buf /*in*/, int *buflen /*in out*/) = 0;
//客户端释放资源
virtual int cltSocketDestory() = 0;
//由于想通过父类指针 释放所有的子类对象的资源，所以一定要为 虚函数
};
3、CEncDesProtocol.h 是定义加密解密的一个抽象类，使其可以成为其他函数调用的接口。
#pragma once
class CEncDesProtocol //加密的抽象类
{
public:
CEncDesProtocol()
{
}
virtual ~CEncDesProtocol()
{
} // 明文 长度 密文 密文长度
virtual int EncData(unsigned char *plain, int plainlen, unsigned char *cryptdata, int *cryptlen) = 0; // 加密 //声明 接口
virtual int DecData(unsigned char *cryptdata, int cryptlen, unsigned char *plain, int *plainlen) = 0; // 解密
};--------------------------------------------------------------------------------------------------------------------------------
接着就是各个产商自己定义了类，我们就可以直接接入我们的框架就可以了。
1、第一个无加密解密的产商的 函数声明： CSckFactoryImp1.h （注：需要根据我们的抽象类来进行声明）
// 新建一个厂商 1 来干活
#pragma once
#include <iostream>
using namespace std;
#include "CSocketProtocol.h" //从抽象类 中继承，就得包含抽象类的头文件
//新建厂商 1 的类
class CSckFactoryImp1 : public CSocketProtocol
{
public:
//我们的任务就是按照抽象类的虚函数进行定义重写就可以了，不能改变，改变了中石油的框架就识别不了
//客户端初始化 获取handle上下
virtual int cltSocketInit( /*out*/);
//客户端发报文
virtual int cltSocketSend( unsigned char *buf /*in*/, int buflen /*in*/);
//客户端收报文
virtual int cltSocketRev( unsigned char *buf /*in*/, int *buflen /*in out*/);
//客户端释放资源
virtual int cltSocketDestory();
private: // 定义自己的属性
unsigned char *p;
int len ;
};
2、第一个无加密解密产商的定义CSckFactoryImp1.cpp
#include <iostream>
using namespace std;
#include "CSckFactoryImp1.h" // 需要包含头文件
// 函数的实现
//客户端初始化 获取handle上下
int CSckFactoryImp1::cltSocketInit( /*out*/)
{
// 属性的初始化
p = NULL;
len = 0 ;
return 0;
}
//客户端发报文
int CSckFactoryImp1::cltSocketSend( unsigned char *buf /*in*/, int buflen /*in*/)
{
// 类型强制转换
p = (unsigned char * ) malloc(sizeof(unsigned char) * buflen);
if (p == NULL) // 分配存储失败
{
return -1;
}
// 把buf的数据拷贝的 p 指针所指向的内存空间中去
memcpy(p, buf, buflen);
len = buflen;
return 0;
}
//客户端收报文
int CSckFactoryImp1::cltSocketRev( unsigned char *buf /*in*/, int *buflen /*in out*/)
{
if (buf==NULL || buflen==NULL)
{
return -1;
}
*buflen = this->len ; // 间接改变形参的值得有 *
memcpy(buf, this->p, this->len); // 把数据拷贝出来
return 0;
}
//客户端释放资源
int CSckFactoryImp1::cltSocketDestory()
{
if (p != NULL)
{
free(p);
p = NULL;
len = 0;
}
return 0;
}3、我们就可以接着接入N个无加密解密的产商，只要按照抽象基类来进行声明和定义就可以了：
CSckFactoryImp2.h
#pragma once
#include <iostream>
using namespace std;
#include "CSocketProtocol.h"
class CSckFactoryImp2 : public CSocketProtocol
{
public:
//客户端初始化 获取handle上下
virtual int cltSocketInit( /*out*/);
//客户端发报文
virtual int cltSocketSend( unsigned char *buf /*in*/, int buflen /*in*/);
//客户端收报文
virtual int cltSocketRev( unsigned char *buf /*in*/, int *buflen /*in out*/);
//客户端释放资源
virtual int cltSocketDestory();
private:
unsigned char *p;
int len ;
};
CSckFactoryImp2.cpp
#include <iostream>
using namespace std;
#include "CSckFactoryImp2.h"
//客户端初始化 获取handle上下
int CSckFactoryImp2::cltSocketInit( /*out*/)
{
p = NULL;
len = 0 ;
return 0;
}
//客户端发报文
int CSckFactoryImp2::cltSocketSend( unsigned char *buf /*in*/, int buflen /*in*/)
{
p = (unsigned char * ) malloc(sizeof(unsigned char) * buflen);
if (p == NULL)
{
return -1;
}
memcpy(p, buf, buflen);
len = buflen;
return 0;
}
//客户端收报文
int CSckFactoryImp2::cltSocketRev( unsigned char *buf /*in*/, int *buflen /*in out*/)
{
if (buf==NULL || buflen==NULL)
{
return -1;
}
*buflen = this->len ;
memcpy(buf, this->p, this->len);
return 0;
}
//客户端释放资源
int CSckFactoryImp2::cltSocketDestory()
{
if (p != NULL)
{
free(p);
p = NULL;
len = 0;
}
return 0;
}-------------------------------------------------------------------------------------------------------------
接着我们对有加密厂商进行函数声明和定义，这是我们就得使用第二个框架了，因为第二个框架才有加密解密的功能。
HwEncDec.h
#include <iostream>
using namespace std;
#include "CEncDesProtocol.h"
class HwEncDec : public CEncDesProtocol
{
public:
virtual int EncData(unsigned char *plain, int plainlen, unsigned char *cryptdata, int *cryptlen);
virtual int DecData(unsigned char *cryptdata, int cryptlen, unsigned char *plain, int *plainlen);
};
#include <iostream>
using namespace std;
#include "HwEncDec.h"
#include "des.h"
// 接口 的实现函数
int HwEncDec::EncData(unsigned char *plain, int plainlen, unsigned char *cryptdata, int *cryptlen)
{
int ret = 0;
//用户使用的函数
ret = DesEnc(plain,plainlen, cryptdata, cryptlen);
if (ret != 0)
{
printf("func DesEnc() err:%d \n ", ret);
return ret;
}
return ret;
}
int HwEncDec::DecData(unsigned char *cryptdata, int cryptlen, unsigned char *plain, int *plainlen)
{
int ret = 0;
//用户使用函数des解密
ret = DesDec(cryptdata, cryptlen, plain, plainlen);
if (ret != 0)
{
printf("func DesDec() err:%d \n ", ret);
return ret;
}
return ret;
}加密解密的功能我们还有需要声明和定义两个文件，分别是des.h 和 des.cpp
/*********************************************************
* des.h
* 用户使用des算法头文件
*
*********************************************************/
#ifndef _OPENDESS_H_
#define _OPENDESS_H_
#ifdef __cplusplus
extern "C" {
#endif
//ab\0defg
//用户使用的函数
int DesEnc(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen);
//用户使用函数des解密
int DesDec(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen);
#ifdef __cplusplus
}
#endif
#endif
/******************************************************
*
* des.c
* common des......
*
******************************************************/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "des.h"
/*********************************************************
data type definition for Des;
**********************************************************/
#define EN0 0
#define DE1 1
#define DES_KEYBYTES 128
#define DES_KEYLONGS 32
#define DES_BLOCKLEN 8
typedef struct {
unsigned char ek[DES_KEYBYTES];
int ekLen;
unsigned char dk[DES_KEYBYTES];
int dkLen;
unsigned char CbcCtx[DES_BLOCKLEN];
} DES_CTX;
typedef struct {
unsigned char ek1[DES_KEYBYTES];
int ek1Len;
unsigned char dk1[DES_KEYBYTES];
int dk1Len;
unsigned char ek2[DES_KEYBYTES];
int ek2Len;
unsigned char dk2[DES_KEYBYTES];
int dk2Len;
unsigned char CbcCtx[DES_BLOCKLEN];
//int IsFirstBlock;
} DES3_CTX;
static unsigned char pc1[56] = {
56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17,
9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35,
62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21,
13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3 };
static unsigned char pc2[48] = {
13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9,
22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1,
40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 };
static unsigned short bytebit[8] = {0200,0100,040,020,010,04,02,01 };
static unsigned char totrot[16] = {1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28};
static unsigned long bigbyte[24] = {
0x800000L, 0x400000L, 0x200000L, 0x100000L,
0x80000L, 0x40000L, 0x20000L, 0x10000L,
0x8000L, 0x4000L, 0x2000L, 0x1000L,
0x800L, 0x400L, 0x200L, 0x100L,
0x80L, 0x40L, 0x20L, 0x10L,
0x8L, 0x4L, 0x2L, 0x1L };
//insert digits
static unsigned long SP1[64] ={
0x01010400l,0x00000000l,0x00010000l,0x01010404l,
0x01010004l,0x00010404l,0x00000004l,0x00010000l,
0x00000400l,0x01010400l,0x01010404l,0x00000400l,
0x01000404l,0x01010004l,0x01000000l,0x00000004l,
0x00000404l,0x01000400l,0x01000400l,0x00010400l,
0x00010400l,0x01010000l,0x01010000l,0x01000404l,
0x00010004l,0x01000004l,0x01000004l,0x00010004l,
0x00000000l,0x00000404l,0x00010404l,0x01000000l,
0x00010000l,0x01010404l,0x00000004l,0x01010000l,
0x01010400l,0x01000000l,0x01000000l,0x00000400l,
0x01010004l,0x00010000l,0x00010400l,0x01000004l,
0x00000400l,0x00000004l,0x01000404l,0x00010404l,
0x01010404l,0x00010004l,0x01010000l,0x01000404l,
0x01000004l,0x00000404l,0x00010404l,0x01010400l,
0x00000404l,0x01000400l,0x01000400l,0x00000000l,
0x00010004l,0x00010400l,0x00000000l,0x01010004l };
static unsigned long SP2[64]={
0x80108020l,0x80008000l,0x00008000l,0x00108020l,
0x00100000l,0x00000020l,0x80100020l,0x80008020l,
0x80000020l,0x80108020l,0x80108000l,0x80000000l,
0x80008000l,0x00100000l,0x00000020l,0x80100020l,
0x00108000l,0x00100020l,0x80008020l,0x00000000l,
0x80000000l,0x00008000l,0x00108020l,0x80100000l,
0x00100020l,0x80000020l,0x00000000l,0x00108000l,
0x00008020l,0x80108000l,0x80100000l,0x00008020l,
0x00000000l,0x00108020l,0x80100020l,0x00100000l,
0x80008020l,0x80100000l,0x80108000l,0x00008000l,
0x80100000l,0x80008000l,0x00000020l,0x80108020l,
0x00108020l,0x00000020l,0x00008000l,0x80000000l,
0x00008020l,0x80108000l,0x00100000l,0x80000020l,
0x00100020l,0x80008020l,0x80000020l,0x00100020l,
0x00108000l,0x00000000l,0x80008000l,0x00008020l,
0x80000000l,0x80100020l,0x80108020l,0x00108000l };
static unsigned long SP3[64]={
0x00000208l,0x08020200l,0x00000000l,0x08020008l,
0x08000200l,0x00000000l,0x00020208l,0x08000200l,
0x00020008l,0x08000008l,0x08000008l,0x00020000l,
0x08020208l,0x00020008l,0x08020000l,0x00000208l,
0x08000000l,0x00000008l,0x08020200l,0x00000200l,
0x00020200l,0x08020000l,0x08020008l,0x00020208l,
0x08000208l,0x00020200l,0x00020000l,0x08000208l,
0x00000008l,0x08020208l,0x00000200l,0x08000000l,
0x08020200l,0x08000000l,0x00020008l,0x00000208l,
0x00020000l,0x08020200l,0x08000200l,0x00000000l,
0x00000200l,0x00020008l,0x08020208l,0x08000200l,
0x08000008l,0x00000200l,0x00000000l,0x08020008l,
0x08000208l,0x00020000l,0x08000000l,0x08020208l,
0x00000008l,0x00020208l,0x00020200l,0x08000008l,
0x08020000l,0x08000208l,0x00000208l,0x08020000l,
0x00020208l,0x00000008l,0x08020008l,0x00020200l };
static unsigned long SP4[64]={
0x00802001l,0x00002081l,0x00002081l,0x00000080l,
0x00802080l,0x00800081l,0x00800001l,0x00002001l,
0x00000000l,0x00802000l,0x00802000l,0x00802081l,
0x00000081l,0x00000000l,0x00800080l,0x00800001l,
0x00000001l,0x00002000l,0x00800000l,0x00802001l,
0x00000080l,0x00800000l,0x00002001l,0x00002080l,
0x00800081l,0x00000001l,0x00002080l,0x00800080l,
0x00002000l,0x00802080l,0x00802081l,0x00000081l,
0x00800080l,0x00800001l,0x00802000l,0x00802081l,
0x00000081l,0x00000000l,0x00000000l,0x00802000l,
0x00002080l,0x00800080l,0x00800081l,0x00000001l,
0x00802001l,0x00002081l,0x00002081l,0x00000080l,
0x00802081l,0x00000081l,0x00000001l,0x00002000l,
0x00800001l,0x00002001l,0x00802080l,0x00800081l,
0x00002001l,0x00002080l,0x00800000l,0x00802001l,
0x00000080l,0x00800000l,0x00002000l,0x00802080l };
static unsigned long SP5[64]={
0x00000100l,0x02080100l,0x02080000l,0x42000100l,
0x00080000l,0x00000100l,0x40000000l,0x02080000l,
0x40080100l,0x00080000l,0x02000100l,0x40080100l,
0x42000100l,0x42080000l,0x00080100l,0x40000000l,
0x02000000l,0x40080000l,0x40080000l,0x00000000l,
0x40000100l,0x42080100l,0x42080100l,0x02000100l,
0x42080000l,0x40000100l,0x00000000l,0x42000000l,
0x02080100l,0x02000000l,0x42000000l,0x00080100l,
0x00080000l,0x42000100l,0x00000100l,0x02000000l,
0x40000000l,0x02080000l,0x42000100l,0x40080100l,
0x02000100l,0x40000000l,0x42080000l,0x02080100l,
0x40080100l,0x00000100l,0x20000000l,0x42080000l,
0x42080100l,0x00080100l,0x42000000l,0x42080100l,
0x02080000l,0x02000100l,0x40000100l,0x00080000l,
0x00080100l,0x02000100l,0x40000100l,0x00080000l,
0x00000000l,0x40080000l,0x02080100l,0x40000100l };
static unsigned long SP6[64]={
0x20000010l,0x20400000l,0x00004000l,0x20404010l,
0x20400000l,0x00000010l,0x20404010l,0x00400000l,
0x20004000l,0x00404010l,0x00400000l,0x20000010l,
0x00400010l,0x20004000l,0x20000000l,0x00004010l,
0x00000000l,0x00400010l,0x20004010l,0x00004000l,
0x00404000l,0x20004010l,0x00000010l,0x20400010l,
0x20400010l,0x00000000l,0x00404010l,0x20404000l,
0x00004010l,0x00404000l,0x20404000l,0x20000000l,
0x20004000l,0x00000010l,0x20400010l,0x00404000l,
0x20404010l,0x00400000l,0x00004010l,0x20000010l,
0x00400000l,0x20004000l,0x20000000l,0x00004010l,
0x20000010l,0x20404010l,0x00404000l,0x20400000l,
0x00404010l,0x20404000l,0x00000000l,0x20400010l,
0x00000010l,0x00004000l,0x20400000l,0x00404010l,
0x00004000l,0x00400010l,0x20004010l,0x00000000l,
0x20404000l,0x20000000l,0x00400010l,0x20004010l };
static unsigned long SP7[64] = {
0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,
0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,
0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,
0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,
0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,
0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,
0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,
0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,
0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,
0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,
0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,
0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,
0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,
0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,
0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,
0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L };
static unsigned long SP8[64] = {
0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,
0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,
0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,
0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,
0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,
0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,
0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,
0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,
0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,
0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,
0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,
0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,
0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,
0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,
0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,
0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };
void deskey(unsigned char *key,short edf, unsigned long *kn);
void cookey(register unsigned long *raw1, unsigned long *dough);
//void cpkey(register unsigned long *into);
//void usekey(register unsigned long *from);
//void des(unsigned char *inblock,unsigned char *outblock);
void scrunch(register unsigned char *outof, register unsigned long *into);
void unscrun(register unsigned long *outof, register unsigned char *into);
void desfunc(register unsigned long *block,register unsigned long *keys);
/***************** DES Function *****************/
unsigned long OPENCOMM_DesExpandEncKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesEncKey,
unsigned long *ulDesEncKeyLen);
unsigned long OPENCOMM_DesExpandDecKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesDecKey,
unsigned long *ulDesDecKeyLen);
unsigned long OPENCOMM_DesEncRaw(
unsigned char *pbDesEncKey,
unsigned long ulDesEncKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen);
unsigned long OPENCOMM_DesDecRaw(
unsigned char *pbDesDecKey,
unsigned long ulDesDecKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen);
int myic_DESDecrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen);
int myic_DESEncrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen);
void deskey(unsigned char *key,short edf, unsigned long *kn)
{
register int i, j, l, m, n;
unsigned long pc1m[56],pcr[56];
for ( j = 0; j < 56; j++ )
{
l = pc1[j];
m = l & 07;
pc1m[j] = (((unsigned long) key[l >> 3] & (unsigned long)bytebit[m] ) ? 1:0);
}
for ( i = 0;i < 16; i++)
{
if ( edf == DE1 ) m = (15 - i) << 1;
else m = i << 1;
n = m + 1;
kn[m] = kn[n] = 0L;
for ( j = 0; j < 28; j++ )
{
l = j + totrot[i];
if ( l < 28 ) pcr[j] = pc1m[l];
else pcr[j] = pc1m[l-28];
}
for (j = 28; j < 56; j++ )
{
l = j + totrot[i];
if ( l < 56 ) pcr[j] = pc1m[l];
else pcr[j] = pc1m[l-28];
}
for ( j = 0; j < 24; j++ )
{
if ( pcr[pc2[j]] ) kn[m] |= bigbyte[j];
if ( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j];
}
}
return;
}
void cookey(register unsigned long *raw1, unsigned long *dough)
{
register unsigned long *cook,*raw0;
register int i;
cook = dough;
for ( i = 0; i < 16; i++, raw1++ ) {
raw0 = raw1++;
*cook = (*raw0 & 0x00fc0000L) << 6;
*cook |= (*raw0 & 0x00000fc0L) << 10;
*cook |= (*raw1 & 0x00fc0000L) >> 10;
*cook++ |= (*raw1 & 0x00000fc0L) >> 6;
*cook = (*raw0 & 0x0003f000L) << 12;
*cook |= (*raw0 & 0x0000003fL) << 16;
*cook |= (*raw1 & 0x0003f000L) >> 4;
*cook++ |= (*raw1 & 0x0000003fL);
}
return;
}
void scrunch(register unsigned char *outof, register unsigned long *into)
{
*into = (*outof++ & 0xffL) << 24;
*into |= (*outof++ & 0xffL) << 16;
*into |= (*outof++ & 0xffL) << 8;
*into++ |= (*outof++ & 0xffL);
*into = (*outof++ & 0xffL) << 24;
*into |= (*outof++ & 0xffL) << 16;
*into |= (*outof++ & 0xffL) << 8;
*into++ |= (*outof & 0xffL);
return;
}
void unscrun(register unsigned long *outof, register unsigned char *into)
{
*into++ = (unsigned char)((*outof >> 24) & 0xffL);
*into++ = (unsigned char)((*outof >> 16) & 0xffL);
*into++ = (unsigned char)((*outof >> 8) & 0xffL);
*into++ = (unsigned char)( *outof++ & 0xffL);
*into++ = (unsigned char)((*outof >> 24) & 0xffL);
*into++ = (unsigned char)((*outof >> 16) & 0xffL);
*into++ = (unsigned char)((*outof >> 8) & 0xffL);
*into = (unsigned char)( *outof & 0xffL);
return;
}
void desfunc(register unsigned long *block,register unsigned long *keys)
{
register unsigned long fval, work, right, leftt;
register int round;
leftt = block[0];
right = block[1];
work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;
right ^= work;
leftt ^= (work << 4);
work = ((leftt >> 16) ^ right) & 0x0000ffffL;
right ^= work;
leftt ^= (work << 16);
work = ((right >> 2) ^ leftt) & 0x33333333L;
leftt ^= work;
right ^= (work << 2);
work = ((right >> 8) ^ leftt) & 0x00ff00ffL;
leftt ^= work;
right ^= (work << 8);
right = ((right << 1) | ((right >>31) & 1L)) & 0xffffffffL;
work = (leftt ^ right) & 0xaaaaaaaaL;
leftt ^= work;
right ^= work;
leftt = ((leftt << 1) | ((leftt >> 31)&1L)) & 0xffffffffL;
for (round = 0; round < 8; round++) {
work = (right << 28) | (right >> 4);
work ^= *keys++;
fval = SP7[ work & 0x3fL];
fval |= SP5[(work >> 8) & 0x3fL];
fval |= SP3[(work >> 16) & 0x3fL];
fval |= SP1[(work >> 24) & 0x3fL];
work = right ^ *keys++;
fval |= SP8[ work & 0x3fL];
fval |= SP6[(work >> 8) & 0x3fL];
fval |= SP4[(work >> 16) & 0x3fL];
fval |= SP2[(work >> 24) & 0x3fL];
leftt ^= fval;
work = (leftt << 28) | (leftt >> 4);
work ^= *keys++;
fval = SP7[ work & 0x3fL];
fval |= SP5[(work >> 8) & 0x3fL];
fval |= SP3[(work >> 16) & 0x3fL];
fval |= SP1[(work >> 24) & 0x3fL];
work = leftt ^ *keys++;
fval |= SP8[ work & 0x3fL];
fval |= SP6[(work >> 8) & 0x3fL];
fval |= SP4[(work >> 16) & 0x3fL];
fval |= SP2[(work >> 24) & 0x3fL];
right ^= fval;
}
right = (right << 31) | (right >> 1);
work = (leftt ^ right) & 0xaaaaaaaaL;
leftt ^= work;
right ^= work;
leftt = (leftt << 31) | (leftt >> 1);
work = ((leftt >> 8) ^ right) & 0x00ff00ffL;
right ^= work;
leftt ^= (work << 8);
work = ((leftt >> 2) ^ right) & 0x33333333L;
right ^= work;
leftt ^= (work << 2);
work = ((right >> 16) ^ leftt) & 0x0000ffffL;
leftt ^= work;
right ^= (work << 16);
work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;
leftt ^= work;
right ^= (work << 4);
*block++ = right;
*block = leftt;
return;
}
/*****************************************************************
OPENCOMM_DesExpandEncKey : Expand Des Enc Key 扩展des加密密钥
Return value:
0 : Success
other : failed
Parameters:
pbDesKey : 扩展前的DES密钥(8字节) input
ulDesKeyLen : 扩展前的DES密钥长度 input
pbDesEncKey : 扩展后的DES加密密钥(128字节) output
*ulDesEncKeyLen : 扩展后的DES加密密钥长度 output
*****************************************************************/
unsigned long OPENCOMM_DesExpandEncKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesEncKey,
unsigned long *ulDesEncKeyLen)
{
unsigned long kn[32], dough[32];
if (ulDesKeyLen != 8)
return 0xEE20;
deskey(pbDesKey, EN0, kn);
cookey(kn, dough);
*ulDesEncKeyLen = DES_KEYBYTES; //32 long = 128 bytes
memcpy(pbDesEncKey, dough, *ulDesEncKeyLen);
return 0;
}
/*****************************************************************
OPENCOMM_DesExpandDecKey : Expand Des Dec Key 扩展des解密密钥
Return value:
0 : Success
other : failed
Parameters:
pbDesKey : 扩展前的DES密钥(8字节) input
ulDesKeyLen : 扩展前的DES密钥长度 input
pbDesDecKey : 扩展后的DES解密密钥(128字节) output
*ulDesDecKeyLen : 扩展后的DES解密密钥长度 output
*****************************************************************/
unsigned long OPENCOMM_DesExpandDecKey(
unsigned char *pbDesKey,
unsigned long ulDesKeyLen,
unsigned char *pbDesDecKey,
unsigned long *ulDesDecKeyLen)
{
unsigned long kn[32], dough[32];
if (ulDesKeyLen != 8)
return 0xEE20;
deskey(pbDesKey, DE1, kn);
cookey(kn, dough);
*ulDesDecKeyLen = DES_KEYBYTES; //32 long = 128 bytes
memcpy(pbDesDecKey, dough, *ulDesDecKeyLen);
return 0;
}
/****************************************************************
OPENCOMM_DesEncRaw : Des算法加密小整块明文8字节
Return value:
0 : Success
other : failed
Parameters:
pbDesEncKey : DES加密密钥 input
ulDesEncKeyLen : DES加密密钥长度 input
pbInData : 待加密的明文 input
ulInDataLen : 待加密的明文长度 input
pbOutData : 加密后的密文 output
*ulOutDataLen : 加密后的密文长度 output
*****************************************************************/
unsigned long OPENCOMM_DesEncRaw(
unsigned char *pbDesEncKey,
unsigned long ulDesEncKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen)
{
unsigned long work[2], ek[DES_KEYLONGS];
unsigned char cp[DES_BLOCKLEN];
if (ulInDataLen != DES_BLOCKLEN)
return 0xEE20;
if (ulDesEncKeyLen != DES_KEYBYTES)
return 0xEE20;
memcpy(cp, pbInData, DES_BLOCKLEN);
scrunch(cp,work); // 8 bytes -> 2 long
memcpy(ek, pbDesEncKey, ulDesEncKeyLen);
desfunc(work,ek);
unscrun(work,cp); // 2 long -> 8 bytes
memcpy(pbOutData, cp, DES_BLOCKLEN);
*ulOutDataLen = DES_BLOCKLEN;
return 0;
}
/*****************************************************************
OPENCOMM_DesDecRaw : Des算法解密小整块密文8字节
Return value:
0 : Success
other : failed
Parameters:
pbDesDecKey : DES解密密钥 input
ulDesDecKeyLen : DES解密密钥长度 input
pbInData : 待解密的密文 input
ulInDataLen : 待解密的密文长度 input
pbOutData : 解密后的明文 output
*ulOutDataLen : 解密后的明文长度 output
*****************************************************************/
unsigned long OPENCOMM_DesDecRaw(
unsigned char *pbDesDecKey,
unsigned long ulDesDecKeyLen,
unsigned char *pbInData,
unsigned long ulInDataLen,
unsigned char *pbOutData,
unsigned long *ulOutDataLen)
{
unsigned long work[2], dk[DES_KEYLONGS];
unsigned char cp[DES_BLOCKLEN];
if (ulInDataLen != DES_BLOCKLEN)
return 0xEE20;
if (ulDesDecKeyLen != DES_KEYBYTES)
return 0xEE20;
memcpy(cp, pbInData, DES_BLOCKLEN);
scrunch(cp,work); // 8 bytes -> 2 long
memcpy(dk, pbDesDecKey, ulDesDecKeyLen);
desfunc(work,dk);
unscrun(work,cp); // 2 long -> 8 bytes
memcpy(pbOutData, cp, DES_BLOCKLEN);
// des_enc(pbDesEncKey, pbInData, pbOutData);
*ulOutDataLen = DES_BLOCKLEN;
return 0;
}
/********************* DES *********************/
int myic_DESEncrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
unsigned char DesKeyBuf[32];
unsigned char DesEncKeyBuf[128];
int EncKeyLen, KeyLen = 0;
int retval = 0, loops, i;
if(nInDataLen%8 != 0)
return 0xEE20;
if(nDesKeyLen != 8)
return 0xEE20;
KeyLen = nDesKeyLen;
memcpy(DesKeyBuf, pDesKey, nDesKeyLen);
retval = OPENCOMM_DesExpandEncKey(DesKeyBuf, KeyLen,
DesEncKeyBuf, (unsigned long *)&EncKeyLen);
if(retval != 0)
return retval;
loops = nInDataLen/8;
for(i = 0; i < loops; i++)
{
retval = OPENCOMM_DesEncRaw(DesEncKeyBuf, EncKeyLen, pInData + i*8,
8, pOutData + i*8, (unsigned long *)pOutDataLen);
if(retval != 0)
return retval;
}
*pOutDataLen = nInDataLen;
return retval;
}
int myic_DESDecrypt(
unsigned char *pDesKey,
int nDesKeyLen,
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
unsigned char DesKeyBuf[32];
unsigned char DesDecKeyBuf[128];
int DecKeyLen, KeyLen = 0;
int retval = 0, loops, i;
if(nInDataLen%8 != 0)
return 0xEE20;
if(nDesKeyLen != 8)
return 0xEE20;
KeyLen = nDesKeyLen;
memcpy(DesKeyBuf, pDesKey, nDesKeyLen);
retval = OPENCOMM_DesExpandDecKey(DesKeyBuf, KeyLen,
DesDecKeyBuf, (unsigned long *)&DecKeyLen);
if(retval != 0)
return retval;
loops = nInDataLen/8;
for(i = 0; i < loops; i++)
{
retval = OPENCOMM_DesDecRaw(DesDecKeyBuf, DecKeyLen, pInData + i*8,
8, pOutData + i*8, (unsigned long *)pOutDataLen);
if(retval != 0)
return retval;
}
*pOutDataLen = nInDataLen;
return retval;
}
//对称明文数据打pading
void CW_dataPadAdd(int tag, unsigned char *date, unsigned int dateLen,
unsigned char **padDate, unsigned int *padDateLen)
{
int i, padLen;
unsigned char *pTmp = NULL;
pTmp = (unsigned char *)malloc(dateLen+24);
if (pTmp == NULL)
{
*padDate = NULL;
return ;
}
memset(pTmp, 0, dateLen+24);
memcpy(pTmp, date, dateLen);
if (tag == 0)
{
padLen = 8 - dateLen % 8;
for (i=0; i<padLen; i++)
{
pTmp[dateLen+i] = (char)padLen;
}
*padDateLen = dateLen + padLen;
}
else
{
padLen = 16 - dateLen % 16;
for (i=0; i<padLen; i++)
{
pTmp[dateLen+i] = (char)padLen;
}
}
*padDateLen = dateLen + padLen;
*padDate = pTmp;
}
#define USER_PASSWORD_KEY "abcd1234"
//数据加密
int DesEnc(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
unsigned char *padDate = NULL;
unsigned int padDateLen = 0;
CW_dataPadAdd(0, pInData, (unsigned int )nInDataLen, &padDate, &padDateLen);
rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
padDate, (int)padDateLen, pOutData, pOutDataLen);
if (rv != 0)
{
if (padDate != NULL)
{
free(padDate);
}
return rv;
}
if (padDate != NULL)
{
free(padDate);
}
return 0;
}
//数据加密
int DesEnc_raw(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
unsigned char *padDate = NULL;
unsigned int padDateLen = 0;
rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
pInData, (int)nInDataLen, pOutData, pOutDataLen);
if (rv != 0)
{
return rv;
}
return 0;
}
//解密分配内存错误
#define ERR_MALLOC 20
//密码长度不是8的整数倍, 不合法
#define ERR_FILECONT 20
//用户使用函数des解密
int DesDec(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
char padChar;
unsigned char *tmpPlain = NULL;
tmpPlain = (unsigned char *)malloc(nInDataLen+24);
if (tmpPlain == NULL)
{
return ERR_MALLOC;
}
memset(tmpPlain, 0, nInDataLen+24);
//解密
rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
pInData, nInDataLen, tmpPlain, pOutDataLen);
if (rv != 0)
{
if (tmpPlain != NULL) free(tmpPlain);
return rv;
}
//去pading
padChar = tmpPlain[*pOutDataLen - 1];
if ( (int)padChar<=0 || (int)padChar>8) //异常处理
{
if (tmpPlain) free(tmpPlain);
return ERR_FILECONT;
}
*pOutDataLen = *pOutDataLen - (int)padChar;
//memset(tmpPlain + *pOutDataLen, 0, (int)padChar);
memcpy(pOutData, tmpPlain, *pOutDataLen);
if (tmpPlain) free(tmpPlain);
return 0;
}
//用户使用函数des解密
int DesDec_raw(
unsigned char *pInData,
int nInDataLen,
unsigned char *pOutData,
int *pOutDataLen)
{
int rv;
//char padChar;
//unsigned char *tmpPlain = NULL;
/*
tmpPlain = (unsigned char *)malloc(nInDataLen+24);
if (tmpPlain == NULL)
{
return ERR_MALLOC;
}
memset(tmpPlain, 0, nInDataLen+24);
*/
//解密
rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
pInData, nInDataLen, pOutData, pOutDataLen);
if (rv != 0)
{
//if (tmpPlain != NULL) free(tmpPlain);
return rv;
}
/*
//去pading
padChar = tmpPlain[*pOutDataLen - 1];
if ( (int)padChar<=0 || (int)padChar>8) //异常处理
{
if (tmpPlain) free(tmpPlain);
return ERR_FILECONT;
}
*pOutDataLen = *pOutDataLen - (int)padChar;
//memset(tmpPlain + *pOutDataLen, 0, (int)padChar);
memcpy(pOutData, tmpPlain, *pOutDataLen);
if (tmpPlain) free(tmpPlain);
*/
return 0;
}
--------------------------------------------------------------------------------------------------------------------------------
最后，我们可以重新将两个虚基类重新定义成一个框架：使其更加方便和具有兼容性：
mainclass2.cpp的代码为
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;
#include "CSocketProtocol.h"
#include "CSckFactoryImp1.h"
#include "CSckFactoryImp2.h"
#include "CEncDesProtocol.h"
#include "HwEncDec.h"
//抽象类在多继承中的应用 ，类的功能增强
/*// 这个框架类能够把两个产品都集成在一起 ，从两个抽象类继承
class MainOp : public CSocketProtocol, public CEncDesProtocol
{
public:
protected:
private:
};
*/
// 类的功能增强有两种方法 1、抽象类多继承 2、组合 （在类中组合 CSocketProtocol,CEncDesProtocol 这两个对象）
// 这个框架类能够把两个产品都集成在一起
class MainOp
{
public:
MainOp() // 析构参数
{
this->sp = NULL;
this->ed = NULL;
}
MainOp(CSocketProtocol *sp, CEncDesProtocol *ed) // 调用有参数的
{
this->sp = sp;
this->ed = ed;
}
//
void setSp(CSocketProtocol *sp)
{
this->sp = sp;
}
void setEd(CEncDesProtocol *ed)
{
this->ed = ed;
}
public: //下面就是用两个业务框架
//面向抽象类编程,框架实现完毕
int SckSendAndRec_EncDec3(CSocketProtocol *sp, CEncDesProtocol *ed, unsigned char *in, int inlen, unsigned char *out, int *outlen)
{
int ret = 0;
unsigned char data[4096];
int datalen = 0;
ret = sp->cltSocketInit();
if (ret != 0)
{
goto End;
}
ret = ed->EncData(in,inlen, data, &datalen);
if (ret != 0)
{
goto End;
}
ret = sp->cltSocketSend(data, datalen); //发送数据之前对数据加密 ..
if (ret != 0)
{
goto End;
}
ret = sp->cltSocketRev(data, &datalen); //收到的数据是密文,需要进行解密
if (ret != 0)
{
goto End;
}
ret = ed->DecData(data, datalen, out, outlen );
if (ret != 0)
{
goto End;
}
End:
ret = sp->cltSocketDestory();
return 0;
}
int SckSendAndRec_EncDec3(unsigned char *in, int inlen, unsigned char *out, int *outlen)
{
int ret = 0;
unsigned char data[4096];
int datalen = 0;
ret = this->sp->cltSocketInit();
if (ret != 0)
{
goto End;
}
ret = this->ed->EncData(in,inlen, data, &datalen);
if (ret != 0)
{
goto End;
}
ret = this->sp->cltSocketSend(data, datalen); //发送数据之前对数据加密 ..
if (ret != 0)
{
goto End;
}
ret = sp->cltSocketRev(data, &datalen); //收到的数据是密文,需要进行解密
if (ret != 0)
{
goto End;
}
ret = ed->DecData(data, datalen, out, outlen );
if (ret != 0)
{
goto End;
}
End:
ret = sp->cltSocketDestory();
return 0;
}
private:
CSocketProtocol *sp; // 组合中定义这两个属性
CEncDesProtocol *ed;
};
//写一个框架
int main()
{
int ret = 0;
unsigned char in[4096];
int inlen;
unsigned char out[4096];
int outlen = 0;
strcpy((char *)in, "aadddddddddddaaaaaaaaaaa");
inlen = 9;
MainOp *myMainOp = new MainOp;
CSocketProtocol *sp = NULL;
CEncDesProtocol *ed = NULL;
//sp = new CSckFactoryImp1
sp = new CSckFactoryImp2; //
ed = new HwEncDec;
myMainOp->setSp(sp);
myMainOp->setEd(ed);
ret = myMainOp->SckSendAndRec_EncDec3(in, inlen, out, &outlen);
if (ret!= 0)
{
printf("myMainOp SckSendAndRec_EncDec3() err\n ", ret);
}
delete sp;
delete ed;
delete myMainOp; // 释放内存
cout<<"hello..."<<endl;
system("pause");
return ret;
}MVC思想：
