@Override
    public final boolean markSupported() {
        return false;
    }
Tests if this input stream supports the <code>mark</code>
and <code>reset</code> methods, which it does not.

@return <code>false</code>, since this class does not support the
<code>mark</code> and <code>reset</code> methods.
@see java.io.InputStream#mark(int)
@see java.io.InputStream#reset()
src/main/java/org/gaul/s3proxy/crypto/DecryptionInputStream.java