cherry.foundation.crypto.RSASignatureSupportTest.java Source code

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

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/*
 * 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.foundation.crypto;

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

import java.security.KeyPair;
import java.security.KeyPairGenerator;

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

public class RSASignatureSupportTest {

    @Test
    public void testSignVerify() throws Exception {
        RSASignatureSupport impl = createCrypto();
        for (int i = 0; i < 100; i++) {
            byte[] plain = RandomUtils.nextBytes(245);
            byte[] signed = impl.sign(plain);
            assertNotEquals(plain, signed);
            assertTrue(impl.verify(plain, signed));
        }
    }

    private RSASignatureSupport createCrypto() throws Exception {
        KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
        keygen.initialize(2048);
        KeyPair key = keygen.generateKeyPair();
        RSASignatureSupport crypto = new RSASignatureSupport();
        crypto.setAlgorithm("SHA256withRSA");
        crypto.setPublicKeyResource(new InMemoryResource(key.getPublic().getEncoded()));
        crypto.setPrivateKeyResource(new InMemoryResource(key.getPrivate().getEncoded()));
        crypto.afterPropertiesSet();
        return crypto;
    }

}