Android™

Find a Certificate by it's SHA-1 Thumbprint

See more Cert Store Examples

Finds a certificate by it's SHA-1 hex thumbprint.

Note: This example requires Chilkat v10.1.2 or later.

Android™

// 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);

    boolean success = false;

    CkCertStore certStore = new CkCertStore();

    String thumbprint = "12c1dd8015f3f03f7b1fa619dc24e2493ca8b4b2";

    //  This opens the Current User certificate store on Windows,
    //  On MacOS and iOS it opens the default Keychain.
    boolean bReadOnly = true;
    success = certStore.OpenCurrentUserStore(bReadOnly);
    if (success == false) {
        Log.i(TAG, certStore.lastErrorText());
        return;
        }

    //  Find the certificate having a specific SHA1 thumbprint.
    CkJsonObject json = new CkJsonObject();
    json.UpdateString("thumbprint",thumbprint);

    CkCert cert = new CkCert();
    success = certStore.FindCert(json,cert);
    if (success == false) {
        Log.i(TAG, "Failed to find the certificate.");
        return;
        }

    Log.i(TAG, "Found: " + cert.subjectCN());

    //  -------------------------------------------------------------------------------------
    //  Alternatively, one could load a certificate store object with certs from a PEM file,
    //  and do the same thing..
    CkCertStore certStorePem = new CkCertStore();

    success = certStorePem.LoadPemFile("pemFiles/certificates.pem");
    if (success == false) {
        Log.i(TAG, certStorePem.lastErrorText());
        return;
        }

    success = certStore.FindCert(json,cert);
    if (success == false) {
        Log.i(TAG, "Failed to find the certificate.");
        return;
        }

    Log.i(TAG, "Found: " + cert.subjectCN());

  }

  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."
  }
}