(Java) Binary Certificate Extension Data

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Demonstrates how to binary certificate extension data by OID.

The GetExtensionBd method is added in Chilkat v9.5.0.96.

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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[])
  {
    CkCert cert = new CkCert();

    boolean success = cert.LoadFromFile("qa_data/certs/testCert.cer");
    if (success == false) {
        System.out.println(cert.lastErrorText());
        return;
        }

    CkBinData bd = new CkBinData();

    // The particular certificate in this test contains the following extensions

    String oid = "1.2.250.1.71.1.2.5";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.1.2.2";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.1.2.3";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.1.2.7";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

    oid = "1.2.250.1.71.4.2.5";
    success = cert.GetExtensionBd(oid,bd);
    if (success == true) {
        System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

    // Sample output:
    // 1.2.250.1.71.1.2.5: 040180
    // 1.2.250.1.71.1.2.2: 020100
    // 1.2.250.1.71.1.2.3: 1315383032353030303030312f32393030303539313432
    // 1.2.250.1.71.1.2.7: 02010a
    // 1.2.250.1.71.4.2.5: 30060c04534d3236

    // The above binary values are actually ASN.1
    // You can get the ASN.1 decoed by calling GetExtensionAsXml to get it in XML format,
    // and then you extract the values from the XML.

    oid = "1.2.250.1.71.1.2.5";
    String strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        System.out.println(oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.1.2.2";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        System.out.println(oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.1.2.3";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        System.out.println(oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.1.2.7";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        System.out.println(oid + ": " + strXml);
        }

    oid = "1.2.250.1.71.4.2.5";
    strXml = cert.getExtensionAsXml(oid);
    if (cert.get_LastMethodSuccess() == true) {
        System.out.println(oid + ": " + strXml);
        }

    // Sample output:
    // 1.2.250.1.71.1.2.5: <octets>gA==</octets>
    // 1.2.250.1.71.1.2.2: <int>00</int>
    // 1.2.250.1.71.1.2.3: <printable>8025000001/2900059142</printable>
    // 1.2.250.1.71.1.2.7: <int>0A</int>
    // 1.2.250.1.71.4.2.5: <sequence><utf8>SM26</utf8></sequence>

    // "gA==" is the base64 encoded byte values
    // "0A" is hex for decimal 1
  }
}