Java by API/javax.crypto.spec/DHParameterSpec

javax.crypto.spec.DHParameterSpec

   <source lang="java">
 

import java.math.BigInteger; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.MessageDigest; import java.security.SecureRandom; import java.security.Security; import javax.crypto.KeyAgreement; import javax.crypto.spec.DHParameterSpec; public class Main {

 private static BigInteger g512 = new BigInteger("1234567890", 16);
 private static BigInteger p512 = new BigInteger("1234567890", 16);
 public static void main(String[] args) throws Exception {
   //Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
   DHParameterSpec dhParams = new DHParameterSpec(p512, g512);
   KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");
   keyGen.initialize(dhParams, new SecureRandom());
   KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "BC");
   KeyPair aPair = keyGen.generateKeyPair();
   KeyAgreement bKeyAgree = KeyAgreement.getInstance("DH", "BC");
   KeyPair bPair = keyGen.generateKeyPair();
   aKeyAgree.init(aPair.getPrivate());
   bKeyAgree.init(bPair.getPrivate());
   aKeyAgree.doPhase(bPair.getPublic(), true);
   bKeyAgree.doPhase(aPair.getPublic(), true);
   MessageDigest hash = MessageDigest.getInstance("SHA1", "BC");
   System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));
   System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));
 }

}

 </source>