Diffle-Human密鑰交換（信息安全）--java版本

package hao.ning;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;

import javax.crypto.KeyAgreement;
import javax.crypto.spec.DHParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class Key_DH {

private final static byte skip1024ModulusBytes[]={
          (byte)0xF4, (byte)0x88, (byte)0xFD, (byte)0x58,
            (byte)0x4E, (byte)0x49, (byte)0xDB, (byte)0xCD,
            (byte)0x20, (byte)0xB4, (byte)0x9D, (byte)0xE4,
            (byte)0x91, (byte)0x07, (byte)0x36, (byte)0x6B,
            (byte)0x33, (byte)0x6C, (byte)0x38, (byte)0x0D,
            (byte)0x45, (byte)0x1D, (byte)0x0F, (byte)0x7C,
            (byte)0x88, (byte)0xB3, (byte)0x1C, (byte)0x7C,
            (byte)0x5B, (byte)0x2D, (byte)0x8E, (byte)0xF6,
            (byte)0xF3, (byte)0xC9, (byte)0x23, (byte)0xC0,
            (byte)0x43, (byte)0xF0, (byte)0xA5, (byte)0x5B,
            (byte)0x18, (byte)0x8D, (byte)0x8E, (byte)0xBB,
            (byte)0x55, (byte)0x8C, (byte)0xB8, (byte)0x5D,
            (byte)0x38, (byte)0xD3, (byte)0x34, (byte)0xFD,
            (byte)0x7C, (byte)0x17, (byte)0x57, (byte)0x43,
            (byte)0xA3, (byte)0x1D, (byte)0x18, (byte)0x6C,
            (byte)0xDE, (byte)0x33, (byte)0x21, (byte)0x2C,
            (byte)0xB5, (byte)0x2A, (byte)0xFF, (byte)0x3C,
            (byte)0xE1, (byte)0xB1, (byte)0x29, (byte)0x40,
            (byte)0x18, (byte)0x11, (byte)0x8D, (byte)0x7C,
            (byte)0x84, (byte)0xA7, (byte)0x0A, (byte)0x72,
            (byte)0xD6, (byte)0x86, (byte)0xC4, (byte)0x03,
            (byte)0x19, (byte)0xC8, (byte)0x07, (byte)0x29,
            (byte)0x7A, (byte)0xCA, (byte)0x95, (byte)0x0C,
            (byte)0xD9, (byte)0x96, (byte)0x9F, (byte)0xAB,
            (byte)0xD0, (byte)0x0A, (byte)0x50, (byte)0x9B,
            (byte)0x02, (byte)0x46, (byte)0xD3, (byte)0x08,
            (byte)0x3D, (byte)0x66, (byte)0xA4, (byte)0x5D,
            (byte)0x41, (byte)0x9F, (byte)0x9C, (byte)0x7C,
            (byte)0xBD, (byte)0x89, (byte)0x4B, (byte)0x22,
            (byte)0x19, (byte)0x26, (byte)0xBA, (byte)0xAB,
            (byte)0xA2, (byte)0x5E, (byte)0xC3, (byte)0x55,
            (byte)0xE9, (byte)0x2F, (byte)0x78, (byte)0xC7

  };

// The skip 1024 bit modulus

/*轉載請註明：www.panmum.com*/
  private static final BigInteger skip1024Modulus=new BigInteger(1,skip1024ModulusBytes);
  private static final BigInteger skip1024Base=BigInteger.valueOf(2);
  
  DHParameterSpec DHP=new DHParameterSpec(skip1024Modulus,skip1024Base);
  byte []sb;
  
  public void makeKey(){
    KeyPairGenerator kpg = null;
    try {
        kpg = KeyPairGenerator.getInstance("DH");
    } 
    catch (NoSuchAlgorithmException e1) {
        
        e1.printStackTrace();
    }
      try {
        kpg.initialize(DHP);//初始化"DH",爲其指定參數
    } 
    catch (InvalidAlgorithmParameterException e) {
        
        e.printStackTrace();
    }
     KeyPair kp=kpg.generateKeyPair();
     PublicKey pbk=kp.getPublic();
     PrivateKey prk=kp.getPrivate();
     
    try {
        FileOutputStream f1 = new FileOutputStream("pbk.dat");
        ObjectOutputStream out1 = null;
        
        try {
            out1 = new ObjectOutputStream(f1);
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
        try {
            out1.writeObject(pbk);
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
    } 
    /*轉載請註明：www.tengxunyun.me*/
    catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    
    try {
        FileOutputStream f2= new FileOutputStream("prk.dat");
        ObjectOutputStream out2 = null;
        
        try {
            out2 = new ObjectOutputStream(f2);
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
        try {
            out2.writeObject(prk);
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
    } 
    
    catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}
  
public void shareKey(){
    PublicKey pbk=null;
    PrivateKey prk = null;
    try {
        FileInputStream f1= new FileInputStream("pbk.dat");
        ObjectInputStream in1 = null;
        
        try {
            in1 = new ObjectInputStream(f1);
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
        /*轉載請註明：www.quzhuanpan.com*/
        try {
            try {
                pbk=(PublicKey)in1.readObject();
            }
            catch (ClassNotFoundException e) {
                
                e.printStackTrace();
            }
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
    } 
    catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    
    try {
        FileInputStream f2= new FileInputStream("prk.dat");
        ObjectInputStream in2 = null;
        
        try {
            in2 = new ObjectInputStream(f2);
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
        try {
            try {
                prk=(PrivateKey)in2.readObject();
            }
            catch (ClassNotFoundException e) {
                
                e.printStackTrace();
            }
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
    } 
    catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    
    try {
        KeyAgreement ka=KeyAgreement.getInstance("DH");
        ka.init(prk);//用本身的私鑰初始化祕藥協定對象
        ka.doPhase(pbk, true);
        sb=ka.generateSecret();
        SecretKeySpec k=new SecretKeySpec(sb,"DESede");
    } 
    catch (Exception e) {
        
        e.printStackTrace();
    }
}

public void printShareInformation(){
    System.out.println("Share Information:");
    for(int i=0;i<sb.length;i++){
        System.out.print(sb[i]+",");
    }
}

}

package hao.ning;

public class Main {

public static void main(String args[]){
    Key_DH k_dh=new Key_DH();
    k_dh.makeKey();
    k_dh.shareKey();
    k_dh.printShareInformation();
}

}