Java

Binary Certificate Extension Data

See more Certificates Examples

Demonstrates how to binary certificate extension data by OID.

The GetExtensionBd method is added in Chilkat v9.5.0.96.

Chilkat2 Java

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

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        Cert cert = new Cert();

        try {
            cert.loadFromFile("qa_data/certs/testCert.cer");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        BinData bd = new BinData();

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

        String oid = "1.2.250.1.71.1.2.5";
        try {
            cert.getExtensionBd(oid, bd);
            success = true;
        } catch (ChilkatException e) {
            success = false;
        }
        if (success) {
            System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

        oid = "1.2.250.1.71.1.2.2";
        try {
            cert.getExtensionBd(oid, bd);
            success = true;
        } catch (ChilkatException e) {
            success = false;
        }
        if (success) {
            System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

        oid = "1.2.250.1.71.1.2.3";
        try {
            cert.getExtensionBd(oid, bd);
            success = true;
        } catch (ChilkatException e) {
            success = false;
        }
        if (success) {
            System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

        oid = "1.2.250.1.71.1.2.7";
        try {
            cert.getExtensionBd(oid, bd);
            success = true;
        } catch (ChilkatException e) {
            success = false;
        }
        if (success) {
            System.out.println(oid + ": " + bd.getEncoded("hex_lower"));
        }

        oid = "1.2.250.1.71.4.2.5";
        try {
            cert.getExtensionBd(oid, bd);
            success = true;
        } catch (ChilkatException e) {
            success = false;
        }
        if (success) {
            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;
        try {
            strXml = cert.getExtensionAsXml(oid);
        } catch (ChilkatException e) {
            strXml = null;
        }
        if (strXml != null) {
            System.out.println(oid + ": " + strXml);
        }

        oid = "1.2.250.1.71.1.2.2";
        try {
            strXml = cert.getExtensionAsXml(oid);
        } catch (ChilkatException e) {
            strXml = null;
        }
        if (strXml != null) {
            System.out.println(oid + ": " + strXml);
        }

        oid = "1.2.250.1.71.1.2.3";
        try {
            strXml = cert.getExtensionAsXml(oid);
        } catch (ChilkatException e) {
            strXml = null;
        }
        if (strXml != null) {
            System.out.println(oid + ": " + strXml);
        }

        oid = "1.2.250.1.71.1.2.7";
        try {
            strXml = cert.getExtensionAsXml(oid);
        } catch (ChilkatException e) {
            strXml = null;
        }
        if (strXml != null) {
            System.out.println(oid + ": " + strXml);
        }

        oid = "1.2.250.1.71.4.2.5";
        try {
            strXml = cert.getExtensionAsXml(oid);
        } catch (ChilkatException e) {
            strXml = null;
        }
        if (strXml != null) {
            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 10
    }
}