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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.est.jcajce;

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

import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;

import org.bouncycastle.est.LimitedSource;
import org.bouncycastle.est.Source;
import org.bouncycastle.est.TLSUniqueProvider;


class LimitedSSLSocketSource
    implements Source, TLSUniqueProvider, LimitedSource
{
    protected final SSLSocket socket;
    private final ChannelBindingProvider bindingProvider;
    private final Long absoluteReadLimit;

    public LimitedSSLSocketSource(SSLSocket sock, ChannelBindingProvider bindingProvider, Long absoluteReadLimit)
    {
        this.socket = sock;
        this.bindingProvider = bindingProvider;
        this.absoluteReadLimit = absoluteReadLimit;
    }

    public InputStream getInputStream()
        throws IOException
    {
        return socket.getInputStream();
    }

    public OutputStream getOutputStream()
        throws IOException
    {
        return socket.getOutputStream();
    }

    public SSLSession getSession()
    {
        return socket.getSession();
    }

    public byte[] getTLSUnique()
    {
        if (isTLSUniqueAvailable())
        {
            return bindingProvider.getChannelBinding(socket, "tls-unique");
        }
        throw new IllegalStateException("No binding provider.");
    }

    public boolean isTLSUniqueAvailable()
    {
        return bindingProvider.canAccessChannelBinding(socket);
    }

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

    public Long getAbsoluteReadLimit()
    {
        return absoluteReadLimit;
    }
}