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Votes

Null reference on PdfLoadedDocument.Save when using ECDSA certificate

Hi.
When signing a pdf with an ECDSA cert Syncfusion throws a null reference exception at PdfLoadedDocument.Save.
Notes:
- It only happens when using the ECDSA cert it, works fine with RSA.
- The cert is tested & correct, able to sign pdfs.
- The Stream that the PdfLoadedDocument.Save method takes is also not null.
- Using an external signer won't throw the error but we'd highly prefer to not use that.
Stacktrace:

System.NullReferenceException: 'Object reference not set to an instance of an object

at Syncfusion.Pdf.Security.X509Certificate2Signature.Sign(Byte[] message)

at Syncfusion.Pdf.Security.PdfSignatureDictionary.GetPortableStoreCertificate()

at Syncfusion.Pdf.Security.PdfSignatureDictionary.DocumentSaved(Object sender, DocumentSavedEventArgs e)

at Syncfusion.Pdf.PdfDocumentBase.OnDocumentSaved(DocumentSavedEventArgs args)

at Syncfusion.Pdf.Parsing.PdfLoadedDocument.AppendDocument(PdfWriter writer)

at Syncfusion.Pdf.Parsing.PdfLoadedDocument.Save(Stream stream)