(Android™) Load Java KeyStore and Access Contents

Loads a Java keystore file and iterates over the contents. A Java keystore (.jks) file can contain one or more trusted root certificate entries and/or one or more private key entries. Each private key entry includes an associated certificate chain.

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);

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

    CkJavaKeyStore jks = new CkJavaKeyStore();

    // Load the Java keystore from a file.  The JKS file password is used
    // to verify the keyed digest that is found at the very end of the keystore.
    // It verifies there has been no tampering with the file.
    boolean success = jks.LoadFile("jksFilePassword","/someDir/keyStore.jks");
    if (success != true) {
        Log.i(TAG, jks.lastErrorText());
        return;
        }

    // Find out how many of each type of entry:
    int numTrustedCerts = jks.get_NumTrustedCerts();
    int numPrivateKeys = jks.get_NumPrivateKeys();

    CkCert cert;
    String alias;

    int i;

    // For each trusted certificate, access it by getting
    // it as a cert object.  Also get the alias associated with the certificate.
    Log.i(TAG, "Trusted Certs:");
    i = 0;
    while (i < numTrustedCerts) {
        cert = jks.GetTrustedCert(i);
        Log.i(TAG, jks.getTrustedCertAlias(i) + ": " + cert.subjectDN());

        i = i + 1;
        }

    CkPrivateKey privKey;
    CkCertChain certChain;

    // For each private key entry, get the private key and
    // the associated certificate chain.
    // Each private key is password protected.  Usually it is the same
    // password as used for the keyed digest of the entire JKS.  
    // However, this does not have to be.  The password is passed
    // here to handle the possibility of each private key requiring
    // a different password.
    Log.i(TAG, "Private Keys:");
    i = 0;
    while (i < numPrivateKeys) {
        privKey = jks.GetPrivateKey("jksFilePassword",i);
        Log.i(TAG, jks.getPrivateKeyAlias(i));
        certChain = jks.GetCertChain(i);

        // The 1st certificate in the chain is the one associated with the private key.
        cert = certChain.GetCert(0);
        Log.i(TAG, cert.subjectDN());

        i = i + 1;
        }


  }

  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."
  }
}