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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;

import java.io.ByteArrayInputStream;

import org.bouncycastle.tls.crypto.TlsHash;

class HandshakeMessageInput
    extends ByteArrayInputStream
{
    HandshakeMessageInput(byte[] buf, int offset, int length)
    {
        super(buf, offset, length);
    }

    public boolean markSupported()
    {
        return false;
    }

    public void mark(int readAheadLimit)
    {
        throw new UnsupportedOperationException();
    }

    void updateHash(TlsHash hash)
    {
        hash.update(buf, mark, count - mark);
    }
}