ASN1InputStream aIn = new ASN1InputStream(encIn);  cert = AttributeCertificate.getInstance(aIn.readObject());
this(AttributeCertificate.getInstance(new ASN1InputStream(encIn).readObject()));
    public X509V2AttributeCertificate(        InputStream encIn)        throws IOException    {        ASN1InputStream aIn = new ASN1InputStream(encIn);                cert = AttributeCertificate.getInstance(aIn.readObject());    }