Hello,
I’m using this code to
extract signature data from PDF files, and it works except when it’s a PDF file
signed with Adobe Lifecyle.
In those files the code do not detect any signature, I have attached the signed file where this problem occurred.
What could be the reason
for this to happen?
foreach (Aspose.Pdf.InteractiveFeatures.Forms.Field field in pdfDocument.Form)
{
Aspose.Pdf.InteractiveFeatures.Forms.SignatureField sf = field as Aspose.Pdf.InteractiveFeatures.Forms.SignatureField;
if (sf != null)
{
FileSignature fileSignature = new FileSignature();
fileSignature.SignDate = sf.Signature.Date.ToString();
Stream cerStream = sf.ExtractCertificate();
if (cerStream != null)
{
using (cerStream)
{
int size = (int)cerStream.Length;
byte[] rawData = new byte[size];
size = cerStream.Read(rawData, 0, size);
X509Certificate2 cert = new X509Certificate2();
cert.Import(rawData);
fileSignature.SignerName = cert.GetNameInfo(X509NameType.SimpleName, false);
}
}
fileSignatures.Add(fileSignature);
}
}