private PDFString CreateRecipientString(X509Certificate cert, UserAccessPermissions perm, int keyLength)
{
PDFString text1 = Library.CreateString("");
ASN1 asn1 = new ASN1(48);
asn1.Add(ASN1Convert.FromOID("1.2.840.113549.1.7.3"));
ASN1 asn2 = new ASN1(160);
byte[] numArray1 = new byte[1];
asn2.Add(new ASN1(2, numArray1));
ASN1 asn3 = new ASN1(48);
ASN1 asn4 = new ASN1(48);
asn3.Add(asn4);
new ASN1(2, cert.GetSerialNumber());
return(text1);
}