public void loadSignInfo(string pdf_filename)
{
PdfReader reader = new PdfReader(pdf_filename);
Dictionary <string, System.Drawing.Image> dict = PdfImageExtractor.ExtractImages(pdf_filename);
int sigIndex = 1;
foreach (string key in dict.Keys)
{
System.Drawing.Image img = dict[key];
MemoryStream ms = new MemoryStream();
if (img.RawFormat.Equals(System.Drawing.Imaging.ImageFormat.Bmp))
{
img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
}
else if (img.RawFormat.Equals(System.Drawing.Imaging.ImageFormat.Tiff))
{
img.Save(ms, System.Drawing.Imaging.ImageFormat.Tiff);
}
else if (img.RawFormat.Equals(System.Drawing.Imaging.ImageFormat.Png))
{
img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
}
SigObj sig = new SigObj();
ReadEncodedBitmapResult result = sig.ReadEncodedBitmap(ms.ToArray());
if (result == ReadEncodedBitmapResult.ReadEncodedBitmapOK)
{
//MessageBox.Show(sig.Who + " " + sig.Why + " " + sig.When);
treeView1.BeginUpdate();
treeView1.Nodes.Add("Signature " + sigIndex);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Name: " + sig.Who);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Reason: " + sig.Why);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Timestamp: " + sig.When);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Digitizer: " + sig.get_AdditionalData(CaptData.CaptDigitizer));
treeView1.Nodes[sigIndex - 1].Nodes.Add("Digitizer Driver: " + sig.get_AdditionalData(CaptData.CaptDigitizerDriver));
treeView1.Nodes[sigIndex - 1].Nodes.Add("Machine OS: " + sig.get_AdditionalData(CaptData.CaptMachineOS));
treeView1.Nodes[sigIndex - 1].Nodes.Add("Network Card: " + sig.get_AdditionalData(CaptData.CaptNetworkCard));
treeView1.EndUpdate();
sigIndex = sigIndex + 1;
}
treeView1.ExpandAll();
}
}
public void loadSignInfo(string pdf_filename)
{
PdfReader reader = new PdfReader(pdf_filename);
AcroFields fields = reader.AcroFields;
int sigIndex = 1;
SignatureImageExtractor extractor = new SignatureImageExtractor(reader);
foreach (string sigFieldName in fields.GetSignatureNames())
{
PdfImageObject image = extractor.extractImage(sigFieldName);
MemoryStream ms = new MemoryStream(image.GetImageAsBytes());
SigObj sig = new SigObj();
ReadEncodedBitmapResult result = sig.ReadEncodedBitmap(ms.ToArray());
if (result == ReadEncodedBitmapResult.ReadEncodedBitmapOK)
{
//MessageBox.Show(sig.Who + " " + sig.Why + " " + sig.When);
treeView1.BeginUpdate();
treeView1.Nodes.Add("Signature " + sigIndex);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Name: " + sig.Who);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Reason: " + sig.Why);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Timestamp: " + sig.When);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Digitizer: " + sig.get_AdditionalData(CaptData.CaptDigitizer));
treeView1.Nodes[sigIndex - 1].Nodes.Add("Digitizer Driver: " + sig.get_AdditionalData(CaptData.CaptDigitizerDriver));
treeView1.Nodes[sigIndex - 1].Nodes.Add("Machine OS: " + sig.get_AdditionalData(CaptData.CaptMachineOS));
treeView1.Nodes[sigIndex - 1].Nodes.Add("Network Card: " + sig.get_AdditionalData(CaptData.CaptNetworkCard));
treeView1.Nodes[sigIndex - 1].Nodes.Add("Signature Covers whole document: " + fields.SignatureCoversWholeDocument(sigFieldName).ToString());
treeView1.Nodes[sigIndex - 1].Nodes.Add("Document Revision: " + fields.GetRevision(sigFieldName).ToString() + " of " + fields.TotalRevisions.ToString());
PdfPKCS7 pkcs7 = fields.VerifySignature(sigFieldName);
treeView1.Nodes[sigIndex - 1].Nodes.Add("Integrity Check OK? " + pkcs7.Verify().ToString());
treeView1.EndUpdate();
sigIndex = sigIndex + 1;
}
ms.Close();
}
treeView1.ExpandAll();
}
private void getSignatureFromPdf(string pdf_filename)
{
bool imagesFound = PdfImageExtractor.PageContainsImages(pdf_filename, 1);
if (imagesFound)
{
Dictionary <string, System.Drawing.Image> dict = PdfImageExtractor.ExtractImages(pdf_filename, 1);
foreach (string key in dict.Keys)
{
System.Drawing.Image img = dict[key];
img.Save("sign.png");
SigObj sig = new SigObj();
ReadEncodedBitmapResult result = sig.ReadEncodedBitmap("sign.png");
if (result == ReadEncodedBitmapResult.ReadEncodedBitmapOK)
{
MessageBox.Show(sig.Who + " " + sig.Why + " " + sig.When);
}
}
}
}
