static void PrintSignaturesInfo(string in_docpath)
{
Console.Out.WriteLine("================================================================================");
Console.Out.WriteLine("Reading and printing digital signature information");
using (PDFDoc doc = new PDFDoc(in_docpath))
{
if (!doc.HasSignatures())
{
Console.Out.WriteLine("Doc has no signatures.");
Console.Out.WriteLine("================================================================================");
return;
}
else
{
Console.Out.WriteLine("Doc has signatures.");
}
for (FieldIterator fitr = doc.GetFieldIterator(); fitr.HasNext(); fitr.Next())
{
if (fitr.Current().IsLockedByDigitalSignature())
{
Console.Out.WriteLine("==========\nField locked by a digital signature");
}
else
{
Console.Out.WriteLine("==========\nField not locked by a digital signature");
}
Console.Out.WriteLine("Field name: " + fitr.Current().GetName());
Console.Out.WriteLine("==========");
}
Console.Out.WriteLine("====================\nNow iterating over digital signatures only.\n====================");
DigitalSignatureFieldIterator digsig_fitr = doc.GetDigitalSignatureFieldIterator();
for (; digsig_fitr.HasNext(); digsig_fitr.Next())
{
Console.Out.WriteLine("==========");
Console.Out.WriteLine("Field name of digital signature: " + new Field(digsig_fitr.Current().GetSDFObj()).GetName());
DigitalSignatureField digsigfield = digsig_fitr.Current();
if (!digsigfield.HasCryptographicSignature())
{
Console.Out.WriteLine("Either digital signature field lacks a digital signature dictionary, " +
"or digital signature dictionary lacks a cryptographic hash entry. " +
"Digital signature field is not presently considered signed.\n" +
"==========");
continue;
}
int cert_count = digsigfield.GetCertCount();
Console.Out.WriteLine("Cert count: " + cert_count);
for (int i = 0; i < cert_count; ++i)
{
byte[] cert = digsigfield.GetCert(i);
Console.Out.WriteLine("Cert #" + i + " size: " + cert.Length);
}
DigitalSignatureField.SubFilterType subfilter = digsigfield.GetSubFilter();
Console.Out.WriteLine("Subfilter type: " + (int)subfilter);
if (subfilter != DigitalSignatureField.SubFilterType.e_ETSI_RFC3161)
{
Console.Out.WriteLine("Signature's signer: " + digsigfield.GetSignatureName());
Date signing_time = digsigfield.GetSigningTime();
if (signing_time.IsValid())
{
Console.Out.WriteLine("Signing day: " + (int)signing_time.day);
}
Console.Out.WriteLine("Location: " + digsigfield.GetLocation());
Console.Out.WriteLine("Reason: " + digsigfield.GetReason());
Console.Out.WriteLine("Contact info: " + digsigfield.GetContactInfo());
}
else
{
Console.Out.WriteLine("SubFilter == e_ETSI_RFC3161 (DocTimeStamp; no signing info)\n");
}
Console.Out.WriteLine(((digsigfield.HasVisibleAppearance()) ? "Visible" : "Not visible"));
DigitalSignatureField.DocumentPermissions digsig_doc_perms = digsigfield.GetDocumentPermissions();
string[] locked_fields = digsigfield.GetLockedFields();
foreach (string field_name in locked_fields)
{
Console.Out.WriteLine("This digital signature locks a field named: " + field_name);
}
switch (digsig_doc_perms)
{
case DigitalSignatureField.DocumentPermissions.e_no_changes_allowed:
Console.Out.WriteLine("No changes to the document can be made without invalidating this digital signature.");
break;
case DigitalSignatureField.DocumentPermissions.e_formfilling_signing_allowed:
Console.Out.WriteLine("Page template instantiation, form filling, and signing digital signatures are allowed without invalidating this digital signature.");
break;
case DigitalSignatureField.DocumentPermissions.e_annotating_formfilling_signing_allowed:
Console.Out.WriteLine("Annotating, page template instantiation, form filling, and signing digital signatures are allowed without invalidating this digital signature.");
break;
case DigitalSignatureField.DocumentPermissions.e_unrestricted:
Console.Out.WriteLine("Document not restricted by this digital signature.");
break;
default:
throw new Exception("Unrecognized digital signature document permission level.");
}
Console.Out.WriteLine("==========");
}
}
Console.Out.WriteLine("================================================================================");
}
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("================================================================================");
}
