Java解析X509证书代码

通过PKCS12格式的证书库文件获取证书对象 

1. InputStream inStream = new FileInputStream("c:/certificate.p12");
2.  
    
3.  
   KeyStore ks = KeyStore.getInstance("PKCS12");
4.  
   ks.load(inStream, "password".toCharArray());
5.  
    
6.  
   String alias = ks.aliases().nextElement();
7.  
   certificate = (X509Certificate) ks.getCertificate(alias);
8.  
   System.out.println(certificate .getNotAfter());

通过pem文件获取证书对象

1.  
   CertificateFactory fact = CertificateFactory.getInstance("X.509");
2.  
   X509Certificate certificate = (X509Certificate) fact.generateCertificate(new FileInputStream ("conf/server.crt"));

获取证书的公钥

PublicKey pk = certificate.getPublicKey();

转载于:https://my.oschina.net/yidao620c/blog/3095161