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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.crypto.test;

import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.StreamCipher;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;

/**
 * a basic test that takes a stream cipher, key parameter, and an input
 * and output string.
 */
public class StreamCipherVectorTest
    extends SimpleTest
{
    int                 id;
    StreamCipher        cipher;
    CipherParameters    param;
    byte[]              input;
    byte[]              output;

    public StreamCipherVectorTest(
        int                 id,
        StreamCipher        cipher,
        CipherParameters    param,
        String              input,
        String              output)
    {
        this.id = id;
        this.cipher = cipher;
        this.param = param;
        this.input = Hex.decode(input);
        this.output = Hex.decode(output);
    }

    public String getName()
    {
        return cipher.getAlgorithmName() + " Vector Test " + id;
    }

    public void performTest()
    {
        cipher.init(true, param);

        byte[]  out = new byte[input.length];

        cipher.processBytes(input, 0, input.length, out, 0);

        if (!areEqual(out, output))
        {
            fail("failed.", new String(Hex.encode(output)) , new String(Hex.encode(out)));
        }

        cipher.init(false, param);

        cipher.processBytes(output, 0, output.length, out, 0);

        if (!areEqual(input, out))
        {
            fail("failed reversal");
        }
    }
}