static void SignPDF(string in_docpath,
string in_approval_field_name,
string in_private_key_file_path,
string in_keyfile_password,
string in_appearance_img_path,
string in_outpath)
{
Console.Out.WriteLine("================================================================================");
Console.Out.WriteLine("Signing PDF document");
// Open an existing PDF
using (PDFDoc doc = new PDFDoc(in_docpath))
{
// Sign the approval signatures.
Field found_approval_field = doc.GetField(in_approval_field_name);
DigitalSignatureField found_approval_signature_digsig_field = new DigitalSignatureField(found_approval_field);
Image img2 = Image.Create(doc, in_appearance_img_path);
SignatureWidget found_approval_signature_widget = new SignatureWidget(found_approval_field.GetSDFObj());
found_approval_signature_widget.CreateSignatureAppearance(img2);
#if USE_DOTNET_CRYPTO
DotNetCryptoSignatureHandler sigHandler = new DotNetCryptoSignatureHandler(in_private_key_file_path, in_keyfile_password);
SDF.SignatureHandlerId sigHandlerId = doc.AddSignatureHandler(sigHandler);
found_approval_signature_digsig_field.SignOnNextSaveWithCustomHandler(sigHandlerId);
#else
found_approval_signature_digsig_field.SignOnNextSave(in_private_key_file_path, in_keyfile_password);
#endif
doc.Save(in_outpath, SDFDoc.SaveOptions.e_incremental);
}
Console.Out.WriteLine("================================================================================");
}
static void SignPDF()
{
PDFNet.Initialize();
// Create a page
using (var doc = new PDFDoc()) {
var page = doc.PageCreate(new Rect(0, 0, 595, 842));
page.SetRotation(Page.Rotate.e_0);
page.SetCropBox(new Rect(0, 0, 595, 842));
doc.PagePushBack(page);
var rect = new Rect(0, 0, 0, 0);
var fieldId = Guid.NewGuid().ToString();
var fieldToSign = doc.FieldCreate(fieldId, Field.Type.e_signature);
var signatureAnnotation = Widget.Create(doc, rect, fieldToSign);
signatureAnnotation.SetFlag(Annot.Flag.e_print, true);
signatureAnnotation.SetPage(page);
var widgetObj = signatureAnnotation.GetSDFObj();
widgetObj.PutNumber("F", 132.0);
widgetObj.PutName("Type", "Annot");
page.AnnotPushBack(signatureAnnotation);
//Create the signature handler
var sigHandler = new RemoteSignatureTimeStampPdfHandler(new HttpClient());
//Add handler to PDFDoc instance
var sigHandlerId = doc.AddSignatureHandler(sigHandler);
// Add the SignatureHandler instance to PDFDoc, making sure to keep track of it using the ID returned.
var sigDict = fieldToSign.UseSignatureHandler(sigHandlerId);
var signatureObject = signatureAnnotation.GetSDFObj();
var cultureInfo = new CultureInfo("en-US");
var gmt1Date = DateTime.Now;
var value = gmt1Date.ToString("'D:'yyyyMMddHHmmsszzz", cultureInfo);
// Add signing date
sigDict.PutString("M", value);
doc.Save(SDFDoc.SaveOptions.e_incremental);
}
}
static void CertifyPDF(string in_docpath,
string in_cert_field_name,
string in_private_key_file_path,
string in_keyfile_password,
string in_appearance_image_path,
string in_outpath)
{
Console.Out.WriteLine("================================================================================");
Console.Out.WriteLine("Certifying PDF document");
// Open an existing PDF
using (PDFDoc doc = new PDFDoc(in_docpath))
{
Console.Out.WriteLine("PDFDoc has " + (doc.HasSignatures() ? "signatures" : "no signatures"));
Page page1 = doc.GetPage(1);
// Create a random text field that we can lock using the field permissions feature.
TextWidget annot1 = TextWidget.Create(doc, new Rect(50, 550, 350, 600), "asdf_test_field");
page1.AnnotPushBack(annot1);
/* Create new signature form field in the PDFDoc. The name argument is optional;
* leaving it empty causes it to be auto-generated. However, you may need the name for later.
* Acrobat doesn't show digsigfield in side panel if it's without a widget. Using a
* Rect with 0 width and 0 height, or setting the NoPrint/Invisible flags makes it invisible. */
DigitalSignatureField certification_sig_field = doc.CreateDigitalSignatureField(in_cert_field_name);
SignatureWidget widgetAnnot = SignatureWidget.Create(doc, new Rect(0, 100, 200, 150), certification_sig_field);
page1.AnnotPushBack(widgetAnnot);
// (OPTIONAL) Add an appearance.
// Widget AP from image
Image img = Image.Create(doc, in_appearance_image_path);
widgetAnnot.CreateSignatureAppearance(img);
// End of optional appearance-adding code.
// Add permissions. Lock the random text field.
Console.Out.WriteLine("Adding document permissions.");
certification_sig_field.SetDocumentPermissions(DigitalSignatureField.DocumentPermissions.e_annotating_formfilling_signing_allowed);
Console.Out.WriteLine("Adding field permissions.");
string[] fields_to_lock = new string[1];
fields_to_lock[0] = "asdf_test_field";
certification_sig_field.SetFieldPermissions(DigitalSignatureField.FieldPermissions.e_include, fields_to_lock);
#if USE_DOTNET_CRYPTO
DotNetCryptoSignatureHandler sigHandler = new DotNetCryptoSignatureHandler(in_private_key_file_path, in_keyfile_password);
SDF.SignatureHandlerId sigHandlerId = doc.AddSignatureHandler(sigHandler);
found_approval_signature_digsig_field.CertifyOnNextSaveWithCustomHandler(sigHandlerId);
#else
certification_sig_field.CertifyOnNextSave(in_private_key_file_path, in_keyfile_password);
#endif
///// (OPTIONAL) Add more information to the signature dictionary.
certification_sig_field.SetLocation("Vancouver, BC");
certification_sig_field.SetReason("Document certification.");
certification_sig_field.SetContactInfo("www.pdftron.com");
///// End of optional sig info code.
// Save the PDFDoc. Once the method below is called, PDFNetC will also sign the document using the information provided.
doc.Save(in_outpath, 0);
}
Console.Out.WriteLine("================================================================================");
}
