cherry.foundation.crypto.SecureBigIntegerEncoderTest.java Source code

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Here is the source code for cherry.foundation.crypto.SecureBigIntegerEncoderTest.java

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/*
 * Copyright 2014,2015 agwlvssainokuni
 *
 * 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 cherry.foundation.crypto;

import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.not;
import static org.junit.Assert.assertThat;

import java.math.BigInteger;
import java.security.SecureRandom;

import org.apache.commons.lang3.RandomUtils;
import org.junit.Test;
import org.springframework.security.util.InMemoryResource;

import cherry.foundation.type.SecureBigInteger;

public class SecureBigIntegerEncoderTest {

    private SecureRandom random = new SecureRandom();

    @Test
    public void testEncodeDecode() throws Exception {
        SecureBigIntegerEncoder encoder = createSecureBigIntegerEncoder();
        for (int i = 0; i < 100; i++) {
            BigInteger plain = BigInteger.valueOf(random.nextLong());
            String crypto = encoder.encode(plain);
            assertThat(crypto, is(not(plain.toString())));
            assertThat(encoder.decode(crypto), is(plain));
        }
    }

    @Test
    public void testSecureBigInteger() throws Exception {
        SecureBigInteger.setEncoder(createSecureBigIntegerEncoder());
        for (int i = 0; i < 100; i++) {

            BigInteger plain = BigInteger.valueOf(random.nextInt());
            SecureBigInteger ss0 = SecureBigInteger.plainValueOf(plain);
            assertThat(ss0.plain(), is(plain));
            assertThat(ss0.crypto(), is(not(plain.toString())));

            SecureBigInteger ss1 = SecureBigInteger.cryptoValueOf(ss0.crypto());
            assertThat(ss1.plain(), is(plain));
            assertThat(ss1.crypto(), is(ss0.crypto()));

            SecureBigInteger ss2 = SecureBigInteger.plainValueOf(ss1.plain());
            assertThat(ss2.plain(), is(plain));
            assertThat(ss2.crypto(), is(ss0.crypto()));

            SecureBigInteger ss3 = SecureBigInteger.cryptoValueOf(ss2.crypto());
            assertThat(ss3.plain(), is(plain));
            assertThat(ss3.crypto(), is(ss0.crypto()));
        }
    }

    private SecureBigIntegerEncoder createSecureBigIntegerEncoder() throws Exception {
        AESDeterministicCryptoSupport crypto = new AESDeterministicCryptoSupport();
        crypto.setSecretKeyResource(new InMemoryResource(RandomUtils.nextBytes(16)));
        crypto.setInitVectorResource(new InMemoryResource(RandomUtils.nextBytes(16)));
        crypto.afterPropertiesSet();
        SecureBigIntegerEncoder encoder = new SecureBigIntegerEncoder();
        encoder.setCrypto(crypto);
        return encoder;
    }

}