Seesion在C++服务端的使用方法

#pragma once
#include <iostream>
#include <openssl/md5.h>
#include <string.h>
using namespace std;
class Md5
{
public:
 Md5();
 ~Md5();
 bool SetMd5(string data);
 unsigned char* GetMd5();
private:
 MD5_CTX ctx;
 unsigned char outMd5[16];
};
#include "Md5.h"
Md5::Md5()
{
}
Md5::~Md5()
{
}
unsigned char* Md5::GetMd5()
{
 //数组初始化
 memset(outMd5,0x00,sizeof(outMd5));
 int res = MD5_Final(outMd5,&ctx);
 if(res != 1)
 {
 cout<<"Md5_Final is errpr"<<endl;
 }
 return outMd5;
}
bool Md5::SetMd5(string data)
{
 //初始化Md5
 MD5_Init(&ctx);
 //计算Md5
 int res = MD5_Update(&ctx,data.c_str(),5);
 if(res != 1)
 {
 cout<<"Md5_Update is errpr"<<endl;
 return false;
 }
 return true;
}
#pragma once
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include "string.h"
#include "Md5.h"

class Session
{
public:
 Session();
 ~Session();
 Session(string UserName,int ID);
 bool SetId();
 int GetId();
 bool SetUserName();
 string GetUserName();
 bool SetSessionId();
 bool SetSessionData();
 string GetSessionData();
 unsigned char* GetSessionId();
private:
 string name;
 int id;
 string SessionData;
 Md5 md5;
};
#include "session.h"
Session::Session()
{
}
Session::~Session()
{
}
Session::Session(string UserName,int ID)
{
 this->id = ID;
 this->name = UserName;
}
int Session::GetId()
{
 return this->id;
}
string Session::GetUserName()
{
 return this->name;
}
bool Session::SetSessionData()
{
 char str[20];
 memset(str,0,sizeof(str));
 //这里使用name+id的方式，生成最终的sessionid
 sprintf(str,"%d",GetId());
 SessionData = GetUserName()+str;
 return true;
}
string Session::GetSessionData()
{
 if(!SessionData.empty())
 return SessionData;
}
unsigned char* Session::GetSessionId()
{
 return md5.GetMd5();
}
bool Session::SetSessionId()
{
 bool res = md5.SetMd5(GetSessionData());
 if(!res)
 return false;
 return true;
}
#include "session.h"
int main()
{
 unsigned char* str = new unsigned char[16];
 Session session("test",10);
 session.SetSessionData();
 session.SetSessionId();
 str = session.GetSessionId();
 for(int i=0;i<16;i++)
 {
 printf("%02X",str[i]);
 }
 printf("\n");
 return 0;
}
CXX = g++ -std=c++11 
CFLAG = -g -lssl -lcrypto
target = test
OBJ = Md5.cpp main.cpp session.cpp
$(target):$(OBJ)
 $(CXX) -o $@ $^ $(CFLAG)
clean:
 rm -f $(target)