(Android™) X509Certificate GetCertHash SHA256

See more Certificates Examples

Shows how to get the SHA256 hash of a certificate.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    CkCert cert = new CkCert();

    boolean success;

    // Load a certificate object with a certificate.
    // The certificate object could have come from any source,
    // or perhaps was obtained from another Chilkat function.
    // The source does not matter.  What matters is that we have
    // a cert object loaded with the certificate..
    success = cert.LoadFromFile("qa_data/certs/cert_test123.cer");
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    // Get the binary DER of the certificae, and compute the SHA256 hash:
    CkBinData bdDer = new CkBinData();
    cert.ExportCertDerBd(bdDer);

    // Get the base64 representation of the SHA256 hash.
    String certHash = bdDer.getHash("sha256","base64");

    Log.i(TAG, "Certificate hash in base64 = " + certHash);

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}