trunk/src/ooxml/testcases/org/apache/poi/poifs/crypt/TestAgileEncryptionParameters.java

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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
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       http://www.apache.org/licenses/LICENSE-2.0

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package org.apache.poi.poifs.crypt;

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

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.crypto.Cipher;

import org.apache.poi.POIDataSamples;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.util.IOUtils;
import org.junit.Assume;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class TestAgileEncryptionParameters {

    static byte testData[];
    
    @Parameter(value = 0)
    public CipherAlgorithm ca;
    @Parameter(value = 1)
    public HashAlgorithm ha;
    @Parameter(value = 2)
    public ChainingMode cm;

    @Parameters(name="{0} {1} {2}")
    public static Collection<Object[]> data() {
        CipherAlgorithm caList[] = { CipherAlgorithm.aes128, CipherAlgorithm.aes192, CipherAlgorithm.aes256, CipherAlgorithm.rc2, CipherAlgorithm.des, CipherAlgorithm.des3 };
        HashAlgorithm haList[] = { HashAlgorithm.sha1, HashAlgorithm.sha256, HashAlgorithm.sha384, HashAlgorithm.sha512, HashAlgorithm.md5 };
        ChainingMode cmList[] = { ChainingMode.cbc, ChainingMode.cfb };

        List<Object[]> data = new ArrayList<Object[]>();
        for (CipherAlgorithm ca : caList) {
            for (HashAlgorithm ha : haList) {
                for (ChainingMode cm : cmList) {
                    data.add(new Object[]{ca,ha,cm});
                }
            }
        }
        
        return data;
    }
    
    @BeforeClass
    public static void initTestData() throws Exception {
        InputStream testFile = POIDataSamples.getDocumentInstance().openResourceAsStream("SampleDoc.docx");
        testData = IOUtils.toByteArray(testFile);
        testFile.close();
    }
    
    @Test
    public void testAgileEncryptionModes() throws Exception {
        int maxKeyLen = Cipher.getMaxAllowedKeyLength(ca.jceId);
        Assume.assumeTrue("Please install JCE Unlimited Strength Jurisdiction Policy files", maxKeyLen >= ca.defaultKeySize);
        
        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        POIFSFileSystem fsEnc = new POIFSFileSystem();
        EncryptionInfo infoEnc = new EncryptionInfo(EncryptionMode.agile, ca, ha, -1, -1, cm);
        Encryptor enc = infoEnc.getEncryptor();
        enc.confirmPassword("foobaa");
        OutputStream os = enc.getDataStream(fsEnc);
        os.write(testData);
        os.close();
        bos.reset();
        fsEnc.writeFilesystem(bos);
        fsEnc.close();
        
        POIFSFileSystem fsDec = new POIFSFileSystem(new ByteArrayInputStream(bos.toByteArray()));
        EncryptionInfo infoDec = new EncryptionInfo(fsDec);
        Decryptor dec = infoDec.getDecryptor();
        boolean passed = dec.verifyPassword("foobaa");
        assertTrue(passed);
        InputStream is = dec.getDataStream(fsDec);
        byte actualData[] = IOUtils.toByteArray(is);
        is.close();
        fsDec.close();
        assertArrayEquals("Failed roundtrip - "+ca+"-"+ha+"-"+cm, testData, actualData);
    }
}