Java Requires Chilkat v11.0.0+

Examine SSL/TLS Server Certificate

See more Socket/SSL/TLS Examples

Demonstrates how an application can examine and check a server's SSL/TLS certificate. Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Socket;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Socket socket = new Socket();

        // Connect to a server.
        boolean useTls = true;
        int maxWaitMs = 2000;
        try {
            socket.connect("www.intel.com", 443, useTls, maxWaitMs);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // If we get here, the TLS connection ws made..
        // In any SSL/TLS handshake, the server sends its certificate in a TLS handshake message.
        // Chilkat will keep it cached within the object that made the connection.
        // Get the server's cert and examine a few things.
        Cert cert = new Cert();
        socket.getServerCert(cert);

        System.out.println("Distinguished Name: " + cert.getSubjectDN());
        System.out.println("Common Name: " + cert.getSubjectCN());
        System.out.println("Issuer Distinguished Name: " + cert.getIssuerDN());
        System.out.println("Issuer Common Name: " + cert.getIssuerCN());

        System.out.println("Expired: " + cert.getExpired());
        System.out.println("Revoked: " + cert.getRevoked());
        System.out.println("Signature Verified: " + cert.getSignatureVerified());
        System.out.println("Trusted Root: " + cert.getTrustedRoot());

        // Sample output:

        // Distinguished Name: C=US, ST=California, O=Intel Corporation, CN=*.intel.com
        // Common Name: *.intel.com
        // Issuer Distinguished Name: C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Organization Validation Secure Server CA
        // Issuer Common Name: Sectigo RSA Organization Validation Secure Server CA
        // Expired: False
        // Revoked: False
        // Signature Verified: True
        // Trusted Root: True
    }
}