public byte[] GetEncodedRecipient(int index)
{
//Certificate certificate = recipient.GetX509();
PdfPublicKeyRecipient recipient = (PdfPublicKeyRecipient)recipients[index];
byte[] cms = recipient.Cms;
if (cms != null)
{
return(cms);
}
X509Certificate certificate = recipient.Certificate;
int permission = recipient.Permission;//PdfWriter.AllowCopy | PdfWriter.AllowPrinting | PdfWriter.AllowScreenReaders | PdfWriter.AllowAssembly;
int revision = 3;
permission |= (int)(revision == 3 ? (uint)0xfffff0c0 : (uint)0xffffffc0);
permission &= unchecked ((int)0xfffffffc);
permission += 1;
byte[] pkcs7input = new byte[24];
byte one = (byte)(permission);
byte two = (byte)(permission >> 8);
byte three = (byte)(permission >> 16);
byte four = (byte)(permission >> 24);
System.Array.Copy(seed, 0, pkcs7input, 0, 20); // put this seed in the pkcs7 input
pkcs7input[20] = four;
pkcs7input[21] = three;
pkcs7input[22] = two;
pkcs7input[23] = one;
Asn1Object obj = CreateDERForRecipient(pkcs7input, certificate);
MemoryStream baos = new MemoryStream();
DerOutputStream k = new DerOutputStream(baos);
k.WriteObject(obj);
cms = baos.ToArray();
recipient.Cms = cms;
return(cms);
}
public void AddRecipient(PdfPublicKeyRecipient recipient)
{
recipients.Add(recipient);
}
