Java Requires Chilkat v11.0.0+

Generate a CSR with SAN (Subject Alternative Name) Extension

See more CSR Examples

Demonstrates how to generate a private key and a Certificate Signing Request (CSR) that includes the SAN extension. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Csr;
import com.chilkatsoft.chilkat2.FileAccess;
import com.chilkatsoft.chilkat2.PrivateKey;
import com.chilkatsoft.chilkat2.Rsa;

public class ChilkatExample {

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

        // First generate an RSA private key.
        // (It is also possible to create CSRs based on ECDSA private keys..)
        Rsa rsa = new Rsa();

        // Generate a random 2048-bit RSA key.
        PrivateKey privKey = new PrivateKey();
        try {
            rsa.genKey(2048, privKey);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Create the CSR object and set properties.
        Csr csr = new Csr();

        // Specify the Common Name.
        csr.setCommonName("mysubdomain.mydomain.com");

        // Country Name (2 letter code)
        csr.setCountry("GB");

        // State or Province Name (full name)
        csr.setState("Yorks");

        // Locality Name (eg, city)
        csr.setLocality("York");

        // Organization Name (eg, company)
        csr.setCompany("Internet Widgits Pty Ltd");

        // Organizational Unit Name (eg, secion/division)
        csr.setCompanyDivision("IT");

        // Email address
        csr.setEmailAddress("support@mydomain.com");

        // Add Subject Alternative Names
        // (The AddSan method is added in Chilkat v9.5.0.84)
        // Call AddSan for each alternative name.
        csr.addSan("dnsName", "mydomain.com");
        csr.addSan("dnsName", "mysubdomain.mydomain.com");
        csr.addSan("ipAddress", "192.168.0.123");

        // Create the CSR using the private key.
        String pemStr;
        try {
            pemStr = csr.genCsrPem(privKey);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Save the private key and CSR to a files.
        privKey.savePkcs8EncryptedPemFile("password", "qa_output/privKey1.pem");

        FileAccess fac = new FileAccess();
        fac.writeEntireTextFile("qa_output/csr1.pem", pemStr, "utf-8", false);

        // Show the CSR.
        System.out.println(pemStr);

        // Sample output:

        //     -----BEGIN CERTIFICATE REQUEST-----
        //     MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
        //     bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
        //     HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxCzAJBgNVBAsMAklUMSMw
        //     IQYJKoZIhvcNAQkBFhRzdXBwb3J0QG15ZG9tYWluLmNvbTCCASIwDQYJKoZIhvcN
        //     AQEBBQADggEPADCCAQoCggEBALnQ0un/wF8whk+gPuiAlf3qvx14jgAOV6Erm6EB
        //     H7WACPCpnKcm/8KP+7uoPiwRQaENhMeCgf45vcivl2p6aAn/spLXyEkXyw2d8wFb
        //     YYAGRkiz4Xf7ASJiKuwcOtORz+sSDzgtdfokHfXU1cYeFE2yQhSdLUY5fMn425+g
        //     KoEEsRSjSDe6AKru4+4iGNrLKd8pB9IA5/jOE139IkWlB9r5fEPD5bUTsgqXk9eb
        //     68O0gc712V2eZK07N24lDmFC4bIMTD4csDWocR5hFHXj7NX7c8sOBDcpEb9mPIk4
        //     elxubnhkfnjhOi4J3lDHcT/0ALnbLhf9LnaiKqs+5VcVZvECAwEAAaAAMA0GCSqG
        //     SIb3DQEBBQUAA4IBAQC0AETLIcP3foh5nbu2hVFS8uCUNZ5hEIR1eXmYZmZoBQq2
        //     26ZAoT4CZwixlggC+n7WvAXJ5Pzxpl4wLV4loTiQzaKPX1w0ERo5ZRwLy0n56oG2
        //     6QG+WTViT1C8rlgtVwkCFNOXr0kSSRs8FdaPllqKxK1hxYSL7zwNpumsk39F2cDt
        //     vhcekvH0V3BuGrQFm3dKN/0azW6GOod9+Vq4VzSyOe3kp15oxLBsZOFOu/REujcw
        //     Tzu2jt1asQKUm60CZ9wNHpYepR0Ww40uP1slbehEaFDa6V8b60/tlHHmBbJ4/fy5
        //     hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
        //     -----END CERTIFICATE REQUEST-----
    }
}