dh.rar_DH_DH密钥交换_dh密钥

#include<iostream.h> #include <stdlib.h> #include <stdio.h> #include <time.h> //using namespace std ; class user { public: int p; int g; int key; private: int sec;//随机产生的数值或者先由键盘输入； public: void get( int,int); void getsecert(); int transget(int); int compute(); }; void user::get(int mainp,int maing) { p=mainp; g=maing; } void user::getsecert() { // cout<<"请输入secert的值："; // cin>>sec; srand( (short int)time( NULL ) ); while(1) { sec=rand(); if(sec<p) break; } printf("the randomnum is %d\n",sec); } int user::compute() { int i; key=1; for(i=0;i<sec;i++) key=(g*key)%p; return key; } int user::transget(int getvalue) { int i; key=1; for(i=0;i<sec;i++) key=(getvalue*key)%p; return key; } void main() { int p,g; cout<<"请输入p的值："; cin>>p; cout<<"请输入g的值："; cin>>g; user A,B; int akey,ax,bkey,bx; A.get(p,g); A.getsecert(); ax=A.compute(); cout<<"ax:"<<ax<<endl; B.get(p,g); B.getsecert(); bx=B.compute(); cout<<"bx:"<<bx<<endl; akey=A.transget(bx); bkey=B.transget(ax); if(akey==bkey) { cout<<"密钥交换Success!"<<endl; } else cout<<"error!"<<endl; }