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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 1.4.

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package org.bouncycastle.crypto.tls;

import java.io.IOException;

public interface TlsCipher
{
    int getPlaintextLimit(int ciphertextLimit);

    byte[] encodePlaintext(long seqNo, short type, byte[] plaintext, int offset, int len)
        throws IOException;

    byte[] decodeCiphertext(long seqNo, short type, byte[] ciphertext, int offset, int len)
        throws IOException;
}