Electronic Signatures - Always first signature becomes invalidated after second signing process
Hello,
I have the following behaviour : Always the first signature becomes invalidated as you can see in this photo.
I mention that this did not happen in the past, all signatures remained valid. with the same code.
"
PdfLoadedDocument document = new PdfLoadedDocument(bytes);
PdfCertificate certificate = new PdfCertificate(digitalID);
PdfStandardFont font = new PdfStandardFont(PdfFontFamily.Helvetica, this.font);
Syncfusion.Pdf.Security.PdfSignature signature = new Syncfusion.Pdf.Security.PdfSignature(document, document.Pages[0], certificate, "DigitalSignature");
signature.Bounds = new Syncfusion.Drawing.RectangleF(this.xStart, this.yStart, width, height);
signature.EnableValidationAppearance = true;
signature.Settings.CryptographicStandard = CryptographicStandard.CADES;
signature.Settings.DigestAlgorithm = DigestAlgorithm.SHA512;
signature.IsLocked = false;
signature.Appearance.Normal.Graphics.DrawString("" + this.signText + certificate.SubjectName.ToString() +
//" cu certificat cu token calificat!" +
$" {this.text_timestamp} "
+ DateTime.Now.ToString("MM/dd/yyyy HH:mm"), font, PdfBrushes.Black, width,height);
"
Please, can I have some help about problem understading and how to solve it?
Thank you, any insight would be helpful!
After conducting a thorough analysis, we have discovered that you may be attempting to sign the PDF document using the same signature name. Unfortunately, the grouping between the signature fields with similar names has failed to occur, resulting in this issue. To resolve this problem, we suggest using different names for the signature fields and we also offer an API known as FieldAutoNaming. By setting the API to "false," you can successfully group fields with similar names, thereby preventing them from becoming invalid. However we have discovered a known issue with this API and we will provide further details on July 17th, 2023. For your convenience, we have included a sample document and the corresponding output document. Please test this solution on your end and inform us of the outcome.
Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/Net6.0Sample-854261896
Output:
