com.meltmedia.jackson.crypto.DynamicEncryptionServiceTest.java Source code

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Here is the source code for com.meltmedia.jackson.crypto.DynamicEncryptionServiceTest.java

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/**
 * Copyright (C) 2014 meltmedia (christian.trimble@meltmedia.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file 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.meltmedia.jackson.crypto;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.fail;

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;

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

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class DynamicEncryptionServiceTest {

    public static String IV_FROM_NODE = "Z/t5j0YbTCGstAurhMWzow==";
    public static String SALT_FROM_NODE = "LhrWBg==";
    public static String VALUE_FROM_NODE = "p5lQp8jLM3Xt6pGL2s/YpPC+Xr28FJQl07Qh30qtDIE=";
    public static String DECRYPTED_FROM_NODE = "This is my text!";
    EncryptionService<EncryptedJson> cipher;
    Base64 base64 = new Base64();

    @Before
    public void setUp() throws UnsupportedEncodingException {

        Map<String, char[]> keys = new HashMap<>();
        keys.put("default", "password".toCharArray());

        cipher = new EncryptionService.Builder<EncryptedJson>()
                .withPassphraseLookup(Functions.passphraseFunction(keys))
                .withEncryptedJsonSupplier(Functions.encryptedJsonSupplier("default")).build();
    }

    @Test
    public void shouldDecryptValueFromNodeCipher() throws EncryptionException, UnsupportedEncodingException {
        EncryptedJson value = new EncryptedJson();
        value.setKeyName("default");
        value.setIv(base64.decode(IV_FROM_NODE));
        value.setSalt(base64.decode(SALT_FROM_NODE));
        value.setValue(base64.decode(VALUE_FROM_NODE));
        value.setIterations(2000);
        value.setKeyLength(256);
        value.setCipher(Ciphers.AES_256_CBC);
        value.setKeyDerivation(KeyDerivations.PBKDF2);

        String result = cipher.decrypt(value, "UTF-8");

        assertThat("decrypt value from node cipher", result, equalTo(DECRYPTED_FROM_NODE));
    }

    @Test
    public void shouldSerializeInBase64()
            throws EncryptionException, UnsupportedEncodingException, JsonProcessingException {
        EncryptedJson value = new EncryptedJson();
        value.setKeyName("default");
        value.setIv(base64.decode(IV_FROM_NODE));
        value.setSalt(base64.decode(SALT_FROM_NODE));
        value.setValue(base64.decode(VALUE_FROM_NODE));
        value.setIterations(2000);
        value.setKeyLength(256);
        value.setCipher(Ciphers.AES_256_CBC);
        value.setKeyDerivation(KeyDerivations.PBKDF2);

        ObjectMapper mapper = new ObjectMapper();
        String serialized = mapper.writeValueAsString(value);

        assertThat("the iv is found in the text", serialized, containsString(IV_FROM_NODE));
        assertThat("the salt is found in the text", serialized, containsString(SALT_FROM_NODE));
        assertThat("the value is found in the text", serialized, containsString(VALUE_FROM_NODE));
    }

    @Test
    public void shouldDecryptEncryptedValues() throws EncryptionException, UnsupportedEncodingException {
        EncryptedJson value = cipher.encrypt(DECRYPTED_FROM_NODE, "UTF-8");
        String decrypted = cipher.decrypt(value, "UTF-8");

        assertThat("a value encrypted with the cipher can be decrypted", decrypted, equalTo(DECRYPTED_FROM_NODE));
    }

    @Test
    public void shouldFailIfNoKeyNameSpecified() throws UnsupportedEncodingException {
        EncryptedJson value = new EncryptedJson();
        value.setIv(base64.decode(IV_FROM_NODE));
        value.setSalt(base64.decode(SALT_FROM_NODE));
        value.setValue(base64.decode(VALUE_FROM_NODE));
        value.setIterations(2000);
        value.setKeyLength(256);
        value.setCipher(Ciphers.AES_256_CBC);
        value.setKeyDerivation(KeyDerivations.PBKDF2);
        value.setKeyName("undefined");

        try {
            cipher.decrypt(value, "UTF-8");
            fail("Missing key name did not cause exception.");
        } catch (EncryptionException ee) {
            assertThat("the property is identified in message", ee.getMessage(), containsString("undefined"));
        }
    }

}