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("================================================================================");
}
public void AdhocTest()
{
PDFDoc doc = new PDFDoc(GetTestPdf(SamplePdf));
// Ad-hoc field added for signing the PDF
var signatureField = doc.FieldCreate("sample-field-name", Field.Type.e_signature, "signer name");
signatureField.SetValue("Signature Name");
var digitalSignatureField = new DigitalSignatureField(signatureField);
// Before the rest of the lines or else it fails due to dictionary being empty
digitalSignatureField.SignOnNextSave(GetCertificatePath("pdf-signing.pfx"), CertPassword);
digitalSignatureField.SetReason("reason");
digitalSignatureField.SetContactInfo("*****@*****.**");
digitalSignatureField.SetLocation("location");
digitalSignatureField.SetFieldPermissions(DigitalSignatureField.FieldPermissions.e_include, new string[0]);
digitalSignatureField.SetDocumentPermissions(DigitalSignatureField.DocumentPermissions
.e_formfilling_signing_allowed);
// Save file
var temporaryFile = Path.GetTempFileName();
doc.Save(temporaryFile, pdftron.SDF.SDFDoc.SaveOptions.e_incremental);
// VALIDATE
var result = new PDFDoc(temporaryFile);
var verificationOptions = new VerificationOptions(VerificationOptions.SignatureVerificationSecurityLevel
.e_compatibility_and_archiving);
// Using filepath/password directly makes it fail on adding trusted cert
// THIS ONE FAILS:
// verificationOptions.AddTrustedCertificate(GetCertificatePath("pdf-signing.crt"));
var x509 = new X509Certificate(GetCertificatePath("pdf-signing.pfx"), CertPassword);
verificationOptions.AddTrustedCertificate(x509.GetRawCertData());
DigitalSignatureFieldIterator signatureFieldIterator = result.GetDigitalSignatureFieldIterator();
for (; signatureFieldIterator.HasNext(); signatureFieldIterator.Next())
{
var dsField = signatureFieldIterator.Current();
var verificationResult = dsField.Verify(verificationOptions);
var status = verificationResult.GetTrustStatus();
var certCount = dsField.GetCertCount();
Console.WriteLine($"Verification status {status}");
Console.WriteLine($"Digest status {verificationResult.GetDigestStatus()}");
Console.WriteLine($"Digest document status {verificationResult.GetDocumentStatus()}");
Console.WriteLine($"Verification status {verificationResult.GetVerificationStatus()}");
Console.WriteLine($"Cert count: {certCount}");
Console.WriteLine($"Signature Name{dsField.GetSignatureName()}");
var sigTime = dsField.GetSigningTime();
Console.WriteLine($"Signing Time: {sigTime.day}/{sigTime.month}/{sigTime.year} {sigTime.hour}:{sigTime.minute}.{sigTime.second}");
Assert.True(status != VerificationResult.TrustStatus.e_untrusted, "Unexpected status e_untrusted");
Assert.True(certCount > 0, "DigitalSignatureField should have a certificate");
}
}