http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto.test;

import org.bouncycastle.crypto.engines.RC2Engine;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.RC2Parameters;
import org.bouncycastle.util.encoders.Hex;


RC2 tester - vectors from  ftp://ftp.isi.edu/in-notes/rfc2268.txt
RFC 2268 "A Description of the RC2(r) Encryption Algorithm"

/**
 * RC2 tester - vectors from  ftp://ftp.isi.edu/in-notes/rfc2268.txt
 *
 * RFC 2268 "A Description of the RC2(r) Encryption Algorithm"
 */
public class RC2Test
    extends CipherTest
{
    static BlockCipherVectorTest[] tests =
    {
        new BlockCipherVectorTest(0, new RC2Engine(),
                new RC2Parameters(Hex.decode("0000000000000000"), 63),
                "0000000000000000", "ebb773f993278eff"),

        new BlockCipherVectorTest(1, new RC2Engine(),
                new RC2Parameters(Hex.decode("ffffffffffffffff"), 64),
                "ffffffffffffffff", "278b27e42e2f0d49"),

        new BlockCipherVectorTest(2, new RC2Engine(),
                new RC2Parameters(Hex.decode("3000000000000000"), 64),
                "1000000000000001", "30649edf9be7d2c2"),

        new BlockCipherVectorTest(3, new RC2Engine(),
                new RC2Parameters(Hex.decode("88"), 64),
                "0000000000000000", "61a8a244adacccf0"),

        new BlockCipherVectorTest(4, new RC2Engine(),
                new RC2Parameters(Hex.decode("88bca90e90875a"), 64),
                "0000000000000000", "6ccf4308974c267f"),

        new BlockCipherVectorTest(5, new RC2Engine(),
                new RC2Parameters(Hex.decode("88bca90e90875a7f0f79c384627bafb2"), 64),
                "0000000000000000", "1a807d272bbe5db1"),

        new BlockCipherVectorTest(6, new RC2Engine(),
                new RC2Parameters(Hex.decode("88bca90e90875a7f0f79c384627bafb2"), 128),
                "0000000000000000", "2269552ab0f85ca6"),

        new BlockCipherVectorTest(7, new RC2Engine(),
                new RC2Parameters(Hex.decode("88bca90e90875a7f0f79c384627bafb216f80a6f85920584c42fceb0be255daf1e"), 129),
                "0000000000000000", "5b78d3a43dfff1f1")
    };

    RC2Test()
    {
        super(tests, new RC2Engine(), new KeyParameter(new byte[16]));
    }

    public String getName()
    {
        return "RC2";
    }

    public static void main(
        String[]    args)
    {
        runTest(new RC2Test());
    }
}