com.cedarsoft.crypt.HashTest.java Source code

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Here is the source code for com.cedarsoft.crypt.HashTest.java

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/**
 * Copyright (C) cedarsoft GmbH.
 *
 * Licensed under the GNU General Public License version 3 (the "License")
 * with Classpath Exception; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *         http://www.cedarsoft.org/gpl3ce
 *         (GPL 3 with Classpath Exception)
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3 only, as
 * published by the Free Software Foundation. cedarsoft GmbH designates this
 * particular file as subject to the "Classpath" exception as provided
 * by cedarsoft GmbH in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 3 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 3 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact cedarsoft GmbH, 72810 Gomaringen, Germany,
 * or visit www.cedarsoft.com if you need additional information or
 * have any questions.
 */

package com.cedarsoft.crypt;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.junit.*;
import org.junit.rules.*;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.URL;
import java.security.NoSuchAlgorithmException;

import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;

/**
 * <p>
 * Date: Jul 20, 2007<br>
 * Time: 11:28:04 PM<br>
 */
public class HashTest {
    @Test
    public void testDigestTest() {
        assertNotSame(Algorithm.SHA256.getMessageDigest(), Algorithm.SHA256.getMessageDigest());
    }

    @Test
    public void testToString() {
        assertThat(Hash.fromHex(Algorithm.MD5, "aabb").toString(), is("[MD5: aabb]"));
        assertThat(Hash.fromHex(Algorithm.SHA256, "aabb1111111111").toString(), is("[SHA256: aabb1111111111]"));
    }

    @Test
    public void testString() throws Exception {
        assertEquals("f0e4c2f76c58916ec258f246851bea091d14d4247a2fc3e18694461b1816e13b",
                HashCalculator.calculate(Algorithm.SHA256, "asdf").getValueAsHex());
        assertEquals("f0e4c2f76c58916ec258f246851bea091d14d4247a2fc3e18694461b1816e13b",
                HashCalculator.calculate(Algorithm.SHA256.getMessageDigest(), "asdf").getValueAsHex());
    }

    @Test
    public void testSerialization() throws IOException, ClassNotFoundException {
        Hash hash = Hash.fromHex(Algorithm.SHA256, "1234");

        ByteArrayOutputStream out = new ByteArrayOutputStream();
        new ObjectOutputStream(out).writeObject(hash);

        Hash deserialized = (Hash) new ObjectInputStream(new ByteArrayInputStream(out.toByteArray())).readObject();
        assertEquals(deserialized, hash);
    }

    @Rule
    public TemporaryFolder tmp = new TemporaryFolder();

    @Test
    public void testIt() throws NoSuchAlgorithmException, IOException {
        URL paris = getClass().getResource("/paris.jpg");
        assertNotNull(paris);

        assertEquals("fbd5f9b6c0fd2035c490e46be0bc3ec3",
                HashCalculator.calculate(Algorithm.MD5, paris).getValueAsHex());//value read using md5sum cmd line tool
        assertEquals("aa5371938c4190543bddcfc1193a247717feba06",
                HashCalculator.calculate(Algorithm.SHA1, paris).getValueAsHex());//value read using sha1sum cmd line tool

        assertEquals("aa5371938c4190543bddcfc1193a247717feba06",
                HashCalculator.calculate(Algorithm.SHA1, IOUtils.toByteArray(paris.openStream())).getValueAsHex());
        assertEquals("aa5371938c4190543bddcfc1193a247717feba06",
                HashCalculator.calculate(Algorithm.SHA1, paris.openStream()).getValueAsHex());

        File file = tmp.newFile("paris.jpg");
        FileUtils.writeByteArrayToFile(file, IOUtils.toByteArray(paris.openStream()));
        assertEquals("aa5371938c4190543bddcfc1193a247717feba06",
                HashCalculator.calculate(Algorithm.SHA1, file).getValueAsHex());
    }

    @Test
    public void testRound() {
        Hash hash = new Hash(Algorithm.SHA256, "asdf".getBytes());

        assertEquals("61736466", hash.getValueAsHex());
        assertEquals(Hash.fromHex(hash.getAlgorithm(), hash.getValueAsHex()), hash);
    }

    @Test
    public void testAlgos() throws IOException {
        URL paris = getClass().getResource("/paris.jpg");
        assertNotNull(paris);

        for (Algorithm algorithm : Algorithm.values()) {
            String value = HashCalculator.calculate(algorithm, paris).getValueAsHex();
            assertNotNull(value);
            assertTrue(value.length() > 10);
        }
    }
}