public PdfDocument()
: base(null)
{
Version = new PdfVersion(this, 0, 0);
IndirectObjects = new PdfIndirectObjects(this);
DecryptHandler = new PdfDecryptNone(this);
}
public static PdfDecrypt CreateDecrypt(PdfDocument doc, PdfDictionary trailer)
{
PdfDecrypt ret = new PdfDecryptNone(doc);
// Check for optional encryption reference
PdfObjectReference encryptRef = trailer.OptionalValue <PdfObjectReference>("Encrypt");
if (encryptRef != null)
{
PdfDictionary encryptDict = doc.IndirectObjects.OptionalValue <PdfDictionary>(encryptRef);
PdfName filter = encryptDict.MandatoryValue <PdfName>("Filter");
PdfInteger v = encryptDict.OptionalValue <PdfInteger>("V");
// We only implement the simple Standard, Version 1 scheme
if ((filter.Value == "Standard") && (v != null) && (v.Value == 1))
{
ret = new PdfDecryptStandard(doc, trailer, encryptDict);
}
else
{
throw new ApplicationException("Can only decrypt the standard handler with version 1.");
}
}
return(ret);
}