非对称加密算法ElGamal

package com.imooc.security.elgamal; import java.security.AlgorithmParameterGenerator; import java.security.AlgorithmParameters; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.PrivateKey; import java.security.PublicKey; import java.security.SecureRandom; import java.security.Security; import javax.crypto.spec.DHParameterSpec; import org.apache.commons.codec.binary.Base64; import org.bouncycastle.jce.provider.BouncyCastleProvider; /** * 非对称加密算法 * * @author Bingo_Ge ElGamal算法（同样比较常用） */ public class ImoocElGamal { public static void main(String[] args) { bcElGamal(); } public static void bcElGamal() { try { // 只支持公钥加密，私钥解密（BC实现） Security.addProvider(new BouncyCastleProvider()); // 1.初始化密钥 AlgorithmParameterGenerator algorithmParameterGenerator = AlgorithmParameterGenerator .getInstance("ELGamal"); // KeyPairGenerator senderKeyPairGenerator = KeyPairGenerator.getInstance("ELGamal"); // System.out.println(algorithmParameterGenerator); // System.out.println(senderKeyPairGenerator); algorithmParameterGenerator.init(256); AlgorithmParameters algorithmParameters = algorithmParameterGenerator.generateParameters(); DHParameterSpec dhParameterSpec = algorithmParameters.getParameterSpec(DHParameterSpec.class); KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("ElGamal"); //使用ElGamal非对称加密方式 keyPairGenerator.initialize(dhParameterSpec, new SecureRandom()); KeyPair keyPair = keyPairGenerator.generateKeyPair(); PublicKey eLGamalPublicKey = keyPair.getPublic(); PrivateKey eLGamalPrivateKey = keyPair.getPrivate(); System.out.println("ELGamalPublicKey:" + Base64.encodeBase64String(eLGamalPublicKey.getEncoded())); System.out.println("ELGamalPrivateKey:" + Base64.encodeBase64String(eLGamalPrivateKey.getEncoded())); } catch (Exception e) { e.printStackTrace(); } } }