CiphererWithChooserByKeyIdImplSpecificProviderTest.java

/*
 * Copyright 2012 Mirko Caserta
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this software except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.springcryptoutils.core.cipher.asymmetric;

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertNotNull;

import java.io.UnsupportedEncodingException;
import java.security.Security;
import java.util.UUID;

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class CiphererWithChooserByKeyIdImplSpecificProviderTest {

    static {
        Security.addProvider(new BouncyCastleProvider());
    }

    @Autowired
	private CiphererWithChooserByKeyId encrypter;

	@Autowired
	private CiphererWithChooserByKeyId decrypter;

	@Before
	public void setup() {
		assertNotNull(encrypter);
		assertNotNull(decrypter);
	}

	@Test
	public void testEncryptionBothWays() throws UnsupportedEncodingException {
		final byte[] message = "this is a top-secret message".getBytes("UTF-8");
		byte[] encryptedMessage = encrypter.encrypt("privateKeyId", message);
		assertNotNull(encryptedMessage);
		byte[] decryptedMessage = decrypter.encrypt("publicKeyId", encryptedMessage);
		assertNotNull(decryptedMessage);
		assertArrayEquals(message, decryptedMessage);
	}

	@Test
	public void testEncryptionBothWaysInALoop() throws UnsupportedEncodingException {
		for (int i = 0; i < 100; i++) {
			final byte[] message = UUID.randomUUID().toString().getBytes("UTF-8");
			byte[] encryptedMessage = encrypter.encrypt("privateKeyId", message);
			assertNotNull(encryptedMessage);
			byte[] decryptedMessage = decrypter.encrypt("publicKeyId", encryptedMessage);
			assertNotNull(decryptedMessage);
			assertArrayEquals(message, decryptedMessage);
		}
	}

	@Test
	public void testDecryptionWithGarbageFailsNot() throws UnsupportedEncodingException {
        // for some reason, the BC provider differs from the Sun native
        // implementation in that it doesn't fail when you throw garbage at it
        // in decrypt mode, which makes sense and is better behavior than
        // the native provider
        final byte[] message = "this is garbage".getBytes("UTF-8");
		decrypter.encrypt("publicKeyId", message);
	}

}