import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.KeyStore;
import java.security.KeyStore.Entry;
import java.security.KeyStore.Entry.Attribute;
import java.security.KeyStore.PrivateKeyEntry;
import java.security.KeyStore.SecretKeyEntry;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.UnrecoverableEntryException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Enumeration;

import javax.crypto.BadPaddingException;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class KeyStoreTest {
	
	public static void main(String [] args) throws KeyStoreException, NoSuchAlgorithmException, CertificateException, IOException, UnrecoverableEntryException {
		final byte key[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
			0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f };
		final String password = "123456";
		
		KeyStore ks = KeyStore.getInstance("pkcs12");
	    ks.load(new FileInputStream("test.p12"), password.toCharArray());

	    KeyStore.ProtectionParameter protParam =
		        new KeyStore.PasswordProtection(password.toCharArray());

		KeyStore.SecretKeyEntry skEntry =
		        new KeyStore.SecretKeyEntry(new SecretKeySpec(key, "AES"));

		ks.setEntry("alias1", skEntry, protParam);
		
	    try (FileOutputStream fos = new FileOutputStream("test.p12")) {
	        ks.store(fos, password.toCharArray());
	    } catch (Exception e) {
	    	e.printStackTrace();
		}

	}
}