jks密钥库容器操作 JKSUtilTest

package com.xgh.keystore.test;

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.text.SimpleDateFormat;
import java.util.Date;

import junit.framework.TestCase;
import sun.security.x509.X509CertImpl;

public class JKSUtilTest extends TestCase{
	
	/***
	 * 从jks密钥库容器中的密钥对中读取证书公钥
	 * @return
	 * @throws 
	 */
	public  X509Certificate testGetX509Certificate() throws Exception{
       
		// 读取密钥是所要用到的工具类
		KeyStore keystore = KeyStore.getInstance("JKS");
		String strorePasswd= "111111";//密钥容器密码
		String keyAlias="test";//证书别名
		FileInputStream jksFileInputStream = new FileInputStream("src/test.jks");
		// 读取公钥证书
		keystore.load(jksFileInputStream, strorePasswd.toCharArray());
		X509Certificate cert = (X509CertImpl)keystore.getCertificate(keyAlias);
		//打印证书信息
		printX509CertificateInfo(cert);
		return cert;
	}
	
	/***
	 * 打印证书信息
	 * @param x509Cert
	 */
	public void printX509CertificateInfo(X509Certificate x509Cert){
		System.out.println("证书主题:"+x509Cert.getSubjectDN().getName());
		System.out.println("证书颁发者:" + x509Cert.getIssuerDN().getName());
		System.out.println("证书序列号:" + x509Cert.getSerialNumber());
		// 获得证书有效期
		SimpleDateFormat dateformat = new SimpleDateFormat("yyyy/MM/dd");
		Date beforedate = x509Cert.getNotBefore();
		System.out.println("证书生效日期:" + dateformat.format(beforedate));
		Date afterdate = x509Cert.getNotAfter();
		System.out.println("证书失效日期:" + dateformat.format(afterdate));
		System.out.println("签名算法:" + x509Cert.getSigAlgName());

		
	}
	

	
	/***
	 * 从jks密钥库容器中的密钥对中读取证书公钥
	 * @return
	 * @throws 
	 */
	public  PublicKey testGetPublicKey() throws Exception{
       
		// 读取密钥是所要用到的工具类
		KeyStore keystore = KeyStore.getInstance("JKS");
		String strorePasswd= "111111";//密钥容器密码
		String keyAlias="test";//证书别名
		FileInputStream jksFileInputStream = new FileInputStream("src/test.jks");
		// 读取公钥
		keystore.load(jksFileInputStream, strorePasswd.toCharArray());
		Certificate cert = keystore.getCertificate(keyAlias);
		System.out.println(cert.getClass());
		// 公钥类所对应的类
		PublicKey pubkey = cert.getPublicKey();
		System.out.println("公钥为：");
		System.out.println(pubkey);
		System.out.println(new String(pubkey.getEncoded(),"UTF-8"));
		return pubkey;
	}
	
	/***
	 * 从jks密钥库容器中的密钥对中读取证书私钥
	 * @return
	 * @throws 
	 */
	public  PrivateKey testGetPrivateKey() throws Exception{
       
		// 读取密钥是所要用到的工具类
		KeyStore keystore = KeyStore.getInstance("JKS");
		String strorePasswd= "111111";//密钥容器密码
		String keyAlias="test";//别名
		String keyAliasPass="111111";//私钥密码
		FileInputStream jksFileInputStream = new FileInputStream("src/test.jks");
		// 读取公钥
		keystore.load(jksFileInputStream, strorePasswd.toCharArray());
		//通过别名和密码得到私钥
		PrivateKey privatekey = (PrivateKey)keystore.getKey(keyAlias,keyAliasPass.toCharArray());
		System.out.println("私钥为：");
		System.out.println(privatekey);
		
		return privatekey;
		
	}
	


}