/// <summary>
/// Create Xades <QualifyingProperties> from the <SignatureProperties> and <DataObjectProperties> elements
/// </summary>
/// <param name="signedXml"></param>
/// <param name="document"></param>
/// <param name="certificate"></param>
private void CreateXadesQualifyingProperties(XadesSignedXml signedXml, XmlDocument document, X509Certificate2 certificate)
{
string signatureRootId = CreateId(XadesSignatureRootId);
string signedPropertiesId = CreateId(XadesSignedPropertiesId);
// build xades XML
XmlElement qualifyingProperties = document.CreateElement("QualifyingProperties", XadesNamespaceUrl);
qualifyingProperties.SetAttribute("Target", $"#{signatureRootId}");
XmlElement signedProperties = qualifyingProperties.CreateChild("SignedProperties", XadesNamespaceUrl);
signedProperties.SetAttribute("Id", signedPropertiesId);
XmlElement signatureProperties = SignatureProperties.CreateXadesSignatureProperties(document, certificate, SignatureType);
signedProperties.AppendChild(signatureProperties);
XmlElement dataObjectProperties = CreateXadesDataObjectProperties(document);
if (dataObjectProperties.ChildNodes.Count > 0)
{
signedProperties.AppendChild(dataObjectProperties);
}
// add reference to xades XML
signedXml.AddXadesObject(new DataObject(null, null, null, qualifyingProperties));
Reference signedPropertiesReference = new Reference($"#{signedPropertiesId}")
{
TransformChain = XadesTransformChain, DigestMethod = XadesDigestMethod, Type = XadesReferenceType
};
signedXml.AddReference(signedPropertiesReference);
signedXml.Signature.Id = signatureRootId;
}
public int CreatePDF(Stream stream)
{
GcPdfDocument doc = new GcPdfDocument();
Page page = doc.NewPage();
TextFormat tf = new TextFormat()
{
Font = StandardFonts.Times, FontSize = 14
};
page.Graphics.DrawString(
"Hello, World!\r\nSigned below by GcPdfWeb SignDoc sample.",
tf, new PointF(72, 72));
// Init a test certificate:
var pfxPath = Path.Combine("Resources", "Misc", "GcPdfTest.pfx");
X509Certificate2 cert = new X509Certificate2(File.ReadAllBytes(pfxPath), "qq",
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
SignatureProperties sp = new SignatureProperties();
sp.Certificate = cert;
sp.Location = "GcPdfWeb Sample Browser";
sp.SignerName = "GcPdfWeb";
// Init a signature field to hold the signature:
SignatureField sf = new SignatureField();
sf.Widget.Rect = new RectangleF(72, 72 * 2, 72 * 4, 36);
sf.Widget.Page = page;
sf.Widget.BackColor = Color.LightSeaGreen;
sf.Widget.TextFormat.Font = StandardFonts.Helvetica;
sf.Widget.ButtonAppearance.Caption = $"Signer: {sp.SignerName}\r\nLocation: {sp.Location}";
// Add the signature field to the document:
doc.AcroForm.Fields.Add(sf);
// Connect the signature field and signature props:
sp.SignatureField = sf;
// Sign and save the document:
// NOTES:
// - Signing and saving is an atomic operation, the two cannot be separated.
// - The stream passed to the Sign() method must be readable.
doc.Sign(sp, stream);
// Rewind the stream to read the document just created
// into another GcPdfDocument and verify the signature:
stream.Seek(0, SeekOrigin.Begin);
GcPdfDocument doc2 = new GcPdfDocument();
doc2.Load(stream);
SignatureField sf2 = (SignatureField)doc2.AcroForm.Fields[0];
if (!sf2.Value.VerifySignature())
{
throw new Exception("Failed to verify the signature");
}
// Done (the generated and signed document has already been saved to 'stream').
return(doc.Pages.Count);
}
// This method is almost exactly the same as the SignDoc sample,
// but adds a second signature field (does not sign it though):
private Stream CreateAndSignPdf()
{
GcPdfDocument doc = new GcPdfDocument();
Page page = doc.NewPage();
TextFormat tf = new TextFormat()
{
Font = StandardFonts.Times, FontSize = 14
};
page.Graphics.DrawString(
"Hello, World!\r\nSigned below TWICE by GcPdfWeb SignIncremental sample.",
tf, new PointF(72, 72));
// Init a test certificate:
var pfxPath = Path.Combine("Resources", "Misc", "GcPdfTest.pfx");
X509Certificate2 cert = new X509Certificate2(File.ReadAllBytes(pfxPath), "qq",
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
SignatureProperties sp = new SignatureProperties();
sp.Certificate = cert;
sp.Location = "GcPdfWeb Sample Browser";
sp.SignerName = "GcPdfWeb";
// Init a signature field to hold the signature:
SignatureField sf = new SignatureField();
sf.Widget.Rect = new RectangleF(72, 72 * 2, 72 * 4, 36);
sf.Widget.Page = page;
sf.Widget.BackColor = Color.LightSeaGreen;
// Add the signature field to the document:
doc.AcroForm.Fields.Add(sf);
// Connect the signature field and signature props:
sp.SignatureField = sf;
// Add a second signature field:
SignatureField sf2 = new SignatureField()
{
Name = "SecondSignature"
};
sf2.Widget.Rect = new RectangleF(72, 72 * 3, 72 * 4, 36);
sf2.Widget.Page = page;
sf2.Widget.BackColor = Color.LightYellow;
// Add the signature field to the document:
doc.AcroForm.Fields.Add(sf2);
var ms = new MemoryStream();
doc.Sign(sp, ms);
return(ms);
}
public int CreatePDF(Stream stream)
{
GcPdfDocument doc = new GcPdfDocument();
// Load a signed document (we use code similar to the SignDoc sample):
doc.Load(CreateAndSignPdf());
// Init a second certificate:
var pfxPath = Path.Combine("Resources", "Misc", "JohnDoe.pfx");
X509Certificate2 cert = new X509Certificate2(File.ReadAllBytes(pfxPath), "secret",
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
SignatureProperties sp2 = new SignatureProperties()
{
Certificate = cert,
Location = "GcPdfWeb Sample Browser",
SignerName = "Jaime Smith",
};
// Find the 2nd (not yet filled) signature field:
var sfld2 = doc.AcroForm.Fields["SecondSignature"] as SignatureField;
// Connect the signature field and signature props:
sp2.SignatureField = sfld2 ?? throw new Exception("Unexpected: could not find 'SecondSignature' field");
// Sign and save the document:
doc.Sign(sp2, stream);
// Rewind the stream to read the document just created
// into another GcPdfDocument and verify all signatures:
stream.Seek(0, SeekOrigin.Begin);
GcPdfDocument doc2 = new GcPdfDocument();
doc2.Load(stream);
foreach (var fld in doc2.AcroForm.Fields)
{
if (fld is SignatureField sfld)
{
if (!sfld.Value.VerifySignature())
{
throw new Exception($"Failed to verify signature for field {sfld.Name}");
}
}
}
// Done (the generated and signed document has already been saved to 'stream').
return(doc.Pages.Count);
}
// Main entry point of this sample:
public int CreatePDF(Stream stream)
{
// Set up a font collection with the fonts we need:
_fc.RegisterDirectory(Path.Combine("Resources", "Fonts"));
// Set that font collection on input fields' text layout
// (we will also set it on all text layouts that we'll use):
_inputTl.FontCollection = _fc;
// Set up layout and formatting for input fields:
_inputTl.ParagraphAlignment = ParagraphAlignment.Center;
_inputTf.FontName = "Segoe UI";
_inputTf.FontSize = 12;
_inputTf.FontBold = true;
// Create the time sheet input form
// (in a real-life scenario, we probably would only create it once,
// and then re-use the form PDF):
var doc = MakeTimeSheetForm();
// At this point, 'doc' is an empty AcroForm.
// In a real-life app it would be distributed to employees
// for them to fill and send back.
FillEmployeeData(doc);
//
// At this point the form is filled with employee's data.
//
// Supervisor data (in a real app, these would probably be fetched from a db):
var supName = "Jane Donahue";
var supSignDate = DateTime.Now.ToShortDateString();
SetFieldValue(doc, _Names.EmpSuper, supName);
SetFieldValue(doc, _Names.SupSignDate, supSignDate);
// The next step is to 'flatten' the form: we loop over document AcroForm's fields,
// drawing their current values in place, and then remove the fields.
// This produces a PDF with text fields' values as part of the regular (non-editable) content:
FlattenDoc(doc);
// Now we digitally sign the flattened document on behalf of the 'manager':
var pfxPath = Path.Combine("Resources", "Misc", "GcPdfTest.pfx");
X509Certificate2 cert = new X509Certificate2(File.ReadAllBytes(pfxPath), "qq",
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
SignatureProperties sp = new SignatureProperties();
sp.Certificate = cert;
sp.Location = "GcPdfWeb - TimeSheet sample";
sp.SignerName = supName;
// Connect the signature field and signature props:
SignatureField supSign = doc.AcroForm.Fields.First(f_ => f_.Name == _Names.SupSign) as SignatureField;
sp.SignatureField = supSign;
supSign.Widget.ButtonAppearance.Caption = supName;
// Some browser PDF viewers do not show form fields, so we render a placeholder:
supSign.Widget.Page.Graphics.DrawString("digitally signed", new TextFormat()
{
FontName = "Segoe UI", FontSize = 9
}, supSign.Widget.Rect);
// Done, now save the document with supervisor signature:
doc.Sign(sp, stream);
// Dispose images only after the document is saved:
_disposables.ForEach(d_ => d_.Dispose());
return(doc.Pages.Count);
}
// Main entry point of this sample:
public int CreatePDF(Stream stream)
{
// Set up a font collection with the fonts we need:
_fc.RegisterDirectory(Path.Combine("Resources", "Fonts"));
// Set that font collection on input fields' text layout
// (we will also set it on all text layouts that we'll use):
_inputTl.FontCollection = _fc;
// Set up layout and formatting for input fields:
_inputTl.ParagraphAlignment = ParagraphAlignment.Center;
_inputTf.FontName = "Segoe UI";
_inputTf.FontSize = 12;
_inputTf.FontBold = true;
// Create the time sheet input form
// (in a real-life scenario, we probably would only create it once,
// and then re-use the form PDF):
var doc = MakeTimeSheetForm();
// At this point, 'doc' is an empty AcroForm.
// In a real-life app it would be distributed to employees
// for them to fill and send back.
using (var empSignedStream = FillEmployeeData(doc))
{
//
// At this point 'empSignedStream' contains the form filled with employee's data and signed by them.
//
// Load the employee-signed document:
doc.Load(empSignedStream);
// Fill in supervisor data:
var supName = "Jane Donahue";
var supSignDate = DateTime.Now.ToShortDateString();
SetFieldValue(doc, _Names.EmpSuper, supName);
SetFieldValue(doc, _Names.SupSignDate, supSignDate);
// Digitally sign the document on behalf of the supervisor:
var pfxPath = Path.Combine("Resources", "Misc", "GcPdfTest.pfx");
X509Certificate2 cert = new X509Certificate2(File.ReadAllBytes(pfxPath), "qq",
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
SignatureProperties sp = new SignatureProperties()
{
Certificate = cert,
Location = "GcPdfWeb - TimeSheet Incremental",
SignerName = supName,
SignatureDigestAlgorithm = SignatureDigestAlgorithm.SHA512,
// Connect the signature field and signature props:
SignatureField = doc.AcroForm.Fields.First(f_ => f_.Name == _Names.SupSign) as SignatureField,
};
// Any changes to the document would invalidate the employee's signature, so we cannot do this:
// supSign.Widget.ButtonAppearance.Caption = supName;
//
// Done, now save the document with supervisor signature:
// NOTE: in order to not invalidate the employee's signature,
// we MUST use incremental update here (which is true by default in Sign() method):
doc.Sign(sp, stream);
_logo.Dispose();
return(doc.Pages.Count);
}
}
// Fill in employee info and working hours with sample data:
private Stream FillEmployeeData(GcPdfDocument doc)
{
// For the purposes of this sample, we fill the form with random data:
var empName = "Jaime Smith";
SetFieldValue(doc, _Names.EmpName, empName);
SetFieldValue(doc, _Names.EmpNum, "12345");
SetFieldValue(doc, _Names.EmpDep, "Research & Development");
SetFieldValue(doc, _Names.EmpTitle, "Senior Developer");
SetFieldValue(doc, _Names.EmpStatus, "Full Time");
var rand = new Random((int)DateTime.Now.Ticks);
DateTime workday = DateTime.Now.AddDays(-15);
while (workday.DayOfWeek != DayOfWeek.Sunday)
{
workday = workday.AddDays(1);
}
TimeSpan wkTot = TimeSpan.Zero, wkReg = TimeSpan.Zero, wkOvr = TimeSpan.Zero;
for (int i = 0; i < 7; ++i)
{
// Start time:
var start = new DateTime(workday.Year, workday.Month, workday.Day, rand.Next(6, 12), rand.Next(0, 59), 0);
SetFieldValue(doc, _Names.DtNames[_Names.Dows[i]][0], start.ToShortDateString());
SetFieldValue(doc, _Names.DtNames[_Names.Dows[i]][1], start.ToShortTimeString());
// End time:
var end = start.AddHours(rand.Next(8, 14)).AddMinutes(rand.Next(0, 59));
SetFieldValue(doc, _Names.DtNames[_Names.Dows[i]][2], end.ToShortTimeString());
var tot = end - start;
var reg = TimeSpan.FromHours((start.DayOfWeek != DayOfWeek.Saturday && start.DayOfWeek != DayOfWeek.Sunday) ? 8 : 0);
var ovr = tot.Subtract(reg);
SetFieldValue(doc, _Names.DtNames[_Names.Dows[i]][3], reg.ToString(@"hh\:mm"));
SetFieldValue(doc, _Names.DtNames[_Names.Dows[i]][4], ovr.ToString(@"hh\:mm"));
SetFieldValue(doc, _Names.DtNames[_Names.Dows[i]][5], tot.ToString(@"hh\:mm"));
wkTot += tot;
wkOvr += ovr;
wkReg += reg;
//
workday = workday.AddDays(1);
}
SetFieldValue(doc, _Names.TotalReg, wkReg.TotalHours.ToString("F"));
SetFieldValue(doc, _Names.TotalOvr, wkOvr.TotalHours.ToString("F"));
SetFieldValue(doc, _Names.TotalHours, wkTot.TotalHours.ToString("F"));
SetFieldValue(doc, _Names.EmpSignDate, workday.ToShortDateString());
// Digitally sign the document on behalf of the 'employee':
var pfxPath = Path.Combine("Resources", "Misc", "JohnDoe.pfx");
X509Certificate2 cert = new X509Certificate2(File.ReadAllBytes(pfxPath), "secret",
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
SignatureProperties sp = new SignatureProperties()
{
Certificate = cert,
DocumentAccessPermissions = AccessPermissions.FormFillingAndAnnotations,
Reason = "I confirm time sheet is correct.",
Location = "TimeSheetIncremental sample",
SignerName = empName,
};
// Connect the signature field and signature props:
SignatureField empSign = doc.AcroForm.Fields.First(f_ => f_.Name == _Names.EmpSign) as SignatureField;
sp.SignatureField = empSign;
empSign.Widget.ButtonAppearance.Caption = empName;
// Some browser PDF viewers do not show form fields, so we render a placeholder:
empSign.Widget.Page.Graphics.DrawString("digitally signed", new TextFormat()
{
FontName = "Segoe UI", FontSize = 9
}, empSign.Widget.Rect);
// We now 'flatten' the form: loop over document AcroForm's fields,
// drawing their current values in place, and then remove the fields.
// This produces a PDF with text fields' values as part of the regular
// (non-editable) content (we leave fields filled by the supervisor):
FlattenDoc(doc, _Names.EmpSuper, _Names.SupSignDate);
// Done, now save the document with employee's signature:
var ms = new MemoryStream();
// Note that we do NOT use incremental update here (3rd parameter is false)
// as this is not needed yet (but will be needed/used when signing by supervisor later):
doc.Sign(sp, ms, false);
return(ms);
}
public int CreatePDF(Stream stream)
{
GcPdfDocument doc = new GcPdfDocument();
Page page = doc.NewPage();
TextFormat tf = new TextFormat()
{
Font = StandardFonts.Times, FontSize = 14
};
page.Graphics.DrawString(
"Hello, World!\r\nSigned below by GcPdfWeb SignatureAppearance sample.",
tf, new PointF(72, 72));
// Init a test certificate:
var pfxPath = Path.Combine("Resources", "Misc", "GcPdfTest.pfx");
X509Certificate2 cert = new X509Certificate2(File.ReadAllBytes(pfxPath), "qq",
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
SignatureProperties sp = new SignatureProperties();
sp.Certificate = cert;
sp.Location = "GcPdfWeb Sample Browser";
sp.SignerName = "GcPdfWeb";
// Create a signature field to hold the signature:
SignatureField sf = new SignatureField();
// Add the signature field to the document:
doc.AcroForm.Fields.Add(sf);
// Connect the signature field and signature props:
sp.SignatureField = sf;
// Set up the signature field:
sf.Widget.Rect = new RectangleF(page.Size.Width - 72 * 4, 72 * 2, 72 * 3, 72);
sf.Widget.Page = page;
// Widget visual props will be overridden by sf.Widget.AppearanceStreams.Normal.Default set below:
sf.Widget.BackColor = Color.PeachPuff;
sf.Widget.Border = new GrapeCity.Documents.Pdf.Annotations.Border()
{
Color = Color.SaddleBrown,
Width = 3,
};
sf.Widget.ButtonAppearance.Caption = $"Signer: {sp.SignerName}\r\nLocation: {sp.Location}";
// Create custom signature appearance stream:
var rc = new RectangleF(PointF.Empty, sf.Widget.Rect.Size);
var fxo = new FormXObject(doc, rc);
rc.Inflate(-4, -4);
fxo.Graphics.FillEllipse(rc, Color.CornflowerBlue);
fxo.Graphics.DrawEllipse(rc, new Pen(Color.RoyalBlue, 3));
rc.Inflate(-5, -5);
fxo.Graphics.DrawEllipse(rc, new Pen(Color.LightSteelBlue, 1));
fxo.Graphics.DrawString($"Signed by {sp.SignerName}\non {DateTime.Now.ToShortDateString()}.",
new TextFormat()
{
FontName = "Times New Roman",
FontSize = 14,
FontItalic = true,
ForeColor = Color.Navy
},
fxo.Bounds,
TextAlignment.Center, ParagraphAlignment.Center, false);
sf.Widget.AppearanceStreams.Normal.Default = fxo;
// Reset signature appearance so that the widget appearance stream is used:
sp.SignatureAppearance = null;
// Sign and save the document:
// NOTES:
// - Signing and saving is an atomic operation, the two cannot be separated.
// - The stream passed to the Sign() method must be readable.
doc.Sign(sp, stream);
// Done (the generated and signed docment has already been saved to 'stream').
return(doc.Pages.Count);
}
