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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.

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package org.bouncycastle.crypto.tls;

import java.io.IOException;

/**
 * A generic class for ciphersuites in TLS 1.0.
 */
public abstract class TlsCipherSuite
{

    protected static final short KE_RSA = 1;
    protected static final short KE_RSA_EXPORT = 2;
    protected static final short KE_DHE_DSS = 3;
    protected static final short KE_DHE_DSS_EXPORT = 4;
    protected static final short KE_DHE_RSA = 5;
    protected static final short KE_DHE_RSA_EXPORT = 6;
    protected static final short KE_DH_DSS = 7;
    protected static final short KE_DH_RSA = 8;
    protected static final short KE_DH_anon = 9;
    protected static final short KE_SRP = 10;
    protected static final short KE_SRP_RSA = 11;
    protected static final short KE_SRP_DSS = 12;

    protected abstract void init(byte[] ms, byte[] cr, byte[] sr);

    protected abstract byte[] encodePlaintext(short type, byte[] plaintext, int offset, int len);

    protected abstract byte[] decodeCiphertext(short type, byte[] plaintext, int offset, int len, TlsProtocolHandler handler) throws IOException;

    protected abstract short getKeyExchangeAlgorithm();

}