cherry.goods.crypto.VersionedSignatureTest.java Source code

Introduction

Here is the source code for cherry.goods.crypto.VersionedSignatureTest.java

Source

/*
 * Copyright 2016 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.goods.crypto;

import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.RandomUtils;
import org.junit.Test;

public class VersionedSignatureTest {

    @Test
    public void simpleSignAndVerify() throws Exception {

        Map<Integer, Signature> map = createSignatureMap(1);

        VersionedSignature impl = new VersionedSignature();
        impl.setDefaultVersion(0);
        impl.setSignatureMap(map);
        impl.setVersionStrategy(new DefaultVersionStrategy());

        for (int i = 0; i < 100; i++) {
            byte[] plain = RandomUtils.nextBytes(1024);
            byte[] signed = impl.sign(plain);
            assertNotEquals(plain, signed);
            assertTrue(impl.verify(plain, signed));
        }
    }

    @Test
    public void versionedSignAndVerify() throws Exception {

        Map<Integer, Signature> map = createSignatureMap(2);

        VersionedSignature impl0 = new VersionedSignature();
        impl0.setDefaultVersion(0);
        impl0.setSignatureMap(map);

        VersionedSignature impl1 = new VersionedSignature();
        impl1.setDefaultVersion(1);
        impl1.setSignatureMap(map);

        for (int i = 0; i < 100; i++) {
            byte[] plain = RandomUtils.nextBytes(1024);
            byte[] signed = impl0.sign(plain);
            assertNotEquals(plain, signed);
            assertNotEquals(impl1.sign(plain), signed);
            assertTrue(impl0.verify(plain, signed));
            assertTrue(impl1.verify(plain, signed));
        }
    }

    @Test
    public void errorNoMatchingSignatureToSign() throws Exception {
        Map<Integer, Signature> map = createSignatureMap(1);
        VersionedSignature impl0 = new VersionedSignature();
        impl0.setDefaultVersion(1);
        impl0.setSignatureMap(map);
        try {
            byte[] plain = RandomUtils.nextBytes(1024);
            impl0.sign(plain);
            fail("Exception must be thrown");
        } catch (IllegalStateException ex) {
            // OK
        }
    }

    @Test
    public void errorNoMatchingSignatureToVerify() throws Exception {

        Map<Integer, Signature> map1 = createSignatureMap(2);
        Map<Integer, Signature> map0 = new HashMap<>();
        map0.put(0, map1.get(0));

        VersionedSignature impl0 = new VersionedSignature();
        impl0.setDefaultVersion(0);
        impl0.setSignatureMap(map0);

        VersionedSignature impl1 = new VersionedSignature();
        impl1.setDefaultVersion(1);
        impl1.setSignatureMap(map1);

        try {
            byte[] plain = RandomUtils.nextBytes(1024);
            byte[] signed = impl1.sign(plain);
            assertNotEquals(impl1.sign(plain), signed);

            impl0.verify(plain, signed);
            fail("Exception must be thrown");
        } catch (IllegalStateException ex) {
            // OK
        }
    }

    private Map<Integer, Signature> createSignatureMap(int num) throws Exception {
        Map<Integer, Signature> map = new HashMap<>();
        for (int i = 0; i < num; i++) {
            map.put(i, createRSASignature());
        }
        return map;
    }

    private RSASignature createRSASignature() throws Exception {
        KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
        keygen.initialize(2048);
        KeyPair key = keygen.generateKeyPair();
        RSASignature impl = new RSASignature();
        impl.setAlgorithm("SHA256withRSA");
        impl.setPublicKeyBytes(key.getPublic().getEncoded());
        impl.setPrivateKeyBytes(key.getPrivate().getEncoded());
        return impl;
    }

}