When opened in Adobe Reader it says that the file "claims compliance". However, when verifying the compliance with some validation tools there seem to be some issues mainly related but not limited to fonts. 

Hi there,

I've been researching how to use Telerik PDFProcessing to Digitally Sign a PDF. But can't find any documentation on how to incorporate it into ASP.Net AJAX (VB).

When the indirect object contains more spaces between the object number and the generation number the object content is not successfully parsed.

Expected: one space

Actual: more than one space

Setting a filter on a mask results in an invalid file when exporting. 

Workaround: Set the filer like this:

PdfFormatProvider provider = new PdfFormatProvider();
provider.ExportSettings.ImageCompression = new ImageFilterTypes[] { ImageFilterTypes.FlateDecode };

When a document containing a SignatureField is exported with the IsEncrypted property set to true, a not set UserPassword is required to open it, which makes it impossible to be opened.

Workaround: Exporting with AES256 encryption does not have this problem:

provider.ExportSettings = new PdfExportSettings
{
	IsEncrypted = true,
	EncryptionType = EncryptionType.AES256
};

InvalidOperationException Cannot find the "endstream" keyword with a specific file.

According to the PDF Specification:

A stream consists of a dictionary followed by zero or more bytes bracketed between the keywords stream and endstream:

dictionary
stream
… Zero or more bytes …
endstream

This exception seems to be related to AES algorithm PaddingMode property. 

Export should take into account JavaScript and produce PDF similar to the original page.