Junit for RSA encryption/decryption

pom.xml

<!-- ..... -->
<dependency>
	<groupId>commons-codec</groupId>
	<artifactId>commons-codec</artifactId>
	<version>1.6</version>
</dependency>
<!-- ..... -->

TestRSA.java

import static org.junit.Assert.*;

import java.math.BigInteger;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec;

import javax.crypto.Cipher;

import org.apache.commons.codec.binary.Base64;
import org.junit.Test;

public class TestRSA {

	private static final String STRING_TO_ENCRYPT = "test string";
	private static final String CHAR_ENCODING = "UTF-8";
	
	private static final String PUBLIC_KEY_MODULUS = "114148583453528745752158573299299462974849455803660656482072552191881163973185343560593952047234554690302302264823153536655488960387116585505622616432041543078622970397250697451778064891543319594178153797228157167683013081933196126650429380296544727748466019924362570851520110617956047194419951742367399790853";
	private static final String PUBLIC_KEY_EXPONENT = "65537";
	private static final String PRIVATE_KEY_MODULUS = "114148583453528745752158573299299462974849455803660656482072552191881163973185343560593952047234554690302302264823153536655488960387116585505622616432041543078622970397250697451778064891543319594178153797228157167683013081933196126650429380296544727748466019924362570851520110617956047194419951742367399790853";
	private static final String PRIVATE_KEY_EXPONENT = "33298634640959497097666472440545144470347618842095067376051132227663519734491316328050340650915211507533140282571509976254324090890350410938805456169000256520741194286946780602454621083327057643032729590642843725780625377381384749342388096938198107146927109759526548861172195154004923472826081212789832947265";

	@Test
	public void testEncryptDecrypt() throws Throwable {

		KeyFactory fact = KeyFactory.getInstance("RSA");

		RSAPublicKeySpec publicKeySpec = new RSAPublicKeySpec(new BigInteger(
				PUBLIC_KEY_MODULUS), new BigInteger(PUBLIC_KEY_EXPONENT));
		PublicKey pubKey = fact.generatePublic(publicKeySpec);

		RSAPrivateKeySpec privateKeySpec = new RSAPrivateKeySpec(
				new BigInteger(PRIVATE_KEY_MODULUS), new BigInteger(
						PRIVATE_KEY_EXPONENT));
		PrivateKey privKey = fact.generatePrivate(privateKeySpec);

		byte[] cipherData = null;
		Cipher cipher = null;
		try {
			System.out.println("String to encrypt: " + STRING_TO_ENCRYPT);
			cipher = Cipher.getInstance("RSA");
			cipher.init(Cipher.ENCRYPT_MODE, pubKey);
			cipherData = cipher.doFinal(STRING_TO_ENCRYPT.getBytes(CHAR_ENCODING));

			String encryptedString = Base64
					.encodeBase64URLSafeString(cipherData);
			System.out.println("String after encryption: " + encryptedString);

			cipher.init(Cipher.DECRYPT_MODE, privKey);

			byte[] decryptedData = cipher.doFinal(Base64
					.decodeBase64(encryptedString));
			String decryptedString = new String(decryptedData, CHAR_ENCODING);
			System.out.println("String after decryption: " + decryptedString);
			
			assertEquals("decrypted stinrg is wrong!!",STRING_TO_ENCRYPT,decryptedString);
			
		} catch (Exception e1) {
			System.out.println("error: " + e1.getMessage());
		}

	}

	@Test
	public void generateKeys() throws Exception {

		KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
		kpg.initialize(1024);
		KeyPair kp = kpg.genKeyPair();
		Key publicKey = kp.getPublic();
		Key privateKey = kp.getPrivate();

		KeyFactory fact = KeyFactory.getInstance("RSA");

		RSAPublicKeySpec pub = (RSAPublicKeySpec) fact.getKeySpec(publicKey,
				RSAPublicKeySpec.class);

		RSAPrivateKeySpec priv = (RSAPrivateKeySpec) fact.getKeySpec(
				privateKey, RSAPrivateKeySpec.class);

		System.out.println("Public key Modulus: " + pub.getModulus());
		System.out.println("Public key Exponent: " + pub.getPublicExponent());

		System.out.println("Private key Modulus: " + priv.getModulus());
		System.out
				.println("Private key Exponent: " + priv.getPrivateExponent());

	}

}