How to generate X509Certificate object from byte array in Java

An X.509 certificate is a digital certificate that uses the widely accepted international X.509 public key infrastructure standard to verify that a public key belongs to the user, computer or service identity contained within the certificate.

X.509 certificate object is supported in mostly popular languages such as Java, C#, VB, JavaScript...Today, this post will show you how to generate X509Certificate object from byte array in Java.

byte[] bytes; // byte array
try { 
 CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
 InputStream in = new ByteArrayInputStream(bytes);
 X509Certificate cert = (X509Certificate)certFactory.generateCertificate(in);
} catch (Exception e) {
 e.printStackTrace();
}

These objects above is imported by:

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;