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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 to JDK 1.8.

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package org.bouncycastle.crypto.tls;

import java.io.IOException;
import java.io.InputStream;

/**
 * An InputStream for an TLS 1.0 connection.
 */
class TlsInputStream
    extends InputStream
{
    private byte[] buf = new byte[1];
    private TlsProtocol handler = null;

    TlsInputStream(TlsProtocol handler)
    {
        this.handler = handler;
    }

    public int available()
        throws IOException
    {
        return this.handler.applicationDataAvailable();
    }

    public int read(byte[] buf, int offset, int len)
        throws IOException
    {
        return this.handler.readApplicationData(buf, offset, len);
    }

    public int read()
        throws IOException
    {
        if (this.read(buf) < 0)
        {
            return -1;
        }
        return buf[0] & 0xff;
    }

    public void close()
        throws IOException
    {
        handler.close();
    }
}