import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.security.PrivateKey;
import java.security.PublicKey;

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

public class KeyAgree{

public static void main(String args[ ]) throws Exception{

FileInputStream f1=new FileInputStream("key1.dat");

ObjectInputStream b1=new ObjectInputStream(f1);

PublicKey pbk=(PublicKey)b1.readObject( );

FileInputStream f2=new FileInputStream("key2.dat");

ObjectInputStream b2=new ObjectInputStream(f2);

PrivateKey prk=(PrivateKey)b2.readObject( );

KeyAgreement ka=KeyAgreement.getInstance("DH");

ka.init(prk);

ka.doPhase(pbk,true);

byte[ ] sb=ka.generateSecret();

for(int i=0;i<sb.length;i++ ){

System.out.print(sb[i]+ ",");

}

SecretKeySpec k=new SecretKeySpec(sb,"DESede");

}
}

、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;

import javax.crypto.spec.DHParameterSpec;

public class Key_DH{

// The 1024 bit Diffie-Hellmanmodulus values used by SKIP

private static final 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

private static final BigInteger skip1024Modulus

= new BigInteger(1,skip1024ModulusBytes);

// The base used with the SKIP 1024 bit modulus

private static final BigInteger skip1024Base = BigInteger.valueOf(2);

public static void main(String args[]) throws Exception{

DHParameterSpec DHP=new DHParameterSpec(skip1024Modulus,skip1024Base);

KeyPairGenerator kpg= KeyPairGenerator.getInstance("DH");

kpg.initialize(DHP);

KeyPair kp=kpg.genKeyPair();

PublicKey pbk=kp.getPublic();

PrivateKey prk=kp.getPrivate();

FileOutputStream f1=new FileOutputStream("key1.dat");

ObjectOutputStream b1=new ObjectOutputStream(f1);

b1.writeObject(pbk);

FileOutputStream f2=new FileOutputStream("key2.dat");

ObjectOutputStream b2=new ObjectOutputStream(f2);

b2.writeObject(prk);

}

}

得到的 K为啥回事乱啊么？？？