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(Java) Generate Key and Certificate Signing Request (CSR)

Demonstrates how to generate a new RSA key and a Certificate Signing Request (CSR).

Note: This example requires Chilkat v9.5.0.65 or greater.

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Raspberry Pi and other single board computers

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    //  Note: Requires Chilkat v9.5.0.65 or greater.

    //  This requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  First generate an RSA private key.
    CkRsa rsa = new CkRsa();

    //  Generate a random 2048-bit RSA key.
    boolean success = rsa.GenerateKey(2048);
    if (success != true) {
        System.out.println(rsa.lastErrorText());
        return;
        }

    //  Get the private key
    CkPrivateKey privKey = rsa.ExportPrivateKeyObj();

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

    //  Specify the Common Name.  This is the only required property.
    //  For SSL/TLS certificates, this would be the domain name.
    //  For email certificates this would be the email address.
    csr.put_CommonName("mysubdomain.mydomain.com");

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

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

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

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

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

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

    //  Create the CSR using the private key.
    String pemStr = csr.genCsrPem(privKey);
    if (csr.get_LastMethodSuccess() != true) {
        System.out.println(csr.lastErrorText());

        return;
        }

    //  Save the private key and CSR to a files.
    privKey.SavePkcs8EncryptedPemFile("password","qa_output/privKey1.pem");

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

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

    //  Sample output:
    //  The CSR PEM can be checked here:
    //  https://www.networking4all.com/en/support/tools/csr+check/
    //  Copy-and-paste the PEM into the online CSR Decoding / CSR Verification form

    //  	-----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-----
  }
}

 

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