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The Bouncy Castle Java APIs for the TLS, including a JSSE provider. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.tls.crypto;

import java.io.IOException;

import org.bouncycastle.tls.AlertDescription;
import org.bouncycastle.tls.ProtocolVersion;
import org.bouncycastle.tls.TlsFatalAlert;

/**
 * The cipher for TLS_NULL_WITH_NULL_NULL.
 */
public class TlsNullNullCipher
    implements TlsCipher
{
    public static final TlsNullNullCipher INSTANCE = new TlsNullNullCipher();

    public int getCiphertextDecodeLimit(int plaintextLimit)
    {
        return plaintextLimit;
    }

    public int getCiphertextEncodeLimit(int plaintextLimit)
    {
        return plaintextLimit;
    }

    public int getPlaintextDecodeLimit(int ciphertextLimit)
    {
        return ciphertextLimit;
    }

    public int getPlaintextEncodeLimit(int ciphertextLimit)
    {
        return ciphertextLimit;
    }

    public TlsEncodeResult encodePlaintext(long seqNo, short contentType, ProtocolVersion recordVersion, int headerAllocation,
        byte[] plaintext, int offset, int len) throws IOException
    {
        byte[] result = new byte[headerAllocation + len];
        System.arraycopy(plaintext, offset, result, headerAllocation, len);
        return new TlsEncodeResult(result, 0, result.length, contentType);
    }

    public TlsDecodeResult decodeCiphertext(long seqNo, short recordType, ProtocolVersion recordVersion,
        byte[] ciphertext, int offset, int len) throws IOException
    {
        return new TlsDecodeResult(ciphertext, offset, len, recordType);
    }

    public void rekeyDecoder() throws IOException
    {
        throw new TlsFatalAlert(AlertDescription.internal_error);
    }
    
    public void rekeyEncoder() throws IOException
    {
        throw new TlsFatalAlert(AlertDescription.internal_error);
    }

    public boolean usesOpaqueRecordTypeDecode()
    {
        return false;
    }

    public boolean usesOpaqueRecordTypeEncode()
    {
        return false;
    }
}