// This method defines the visual representation for each signature. For more information, see:
// http://pki.lacunasoftware.com/Help/html/98095ec7-2742-4d1f-9709-681c684eb13b.htm
private PadesVisualRepresentation2 getVisualRepresentation(PKCertificate cert)
{
var visualRepresentation = new PadesVisualRepresentation2()
{
// Text of the visual representation.
Text = new PadesVisualText()
{
// Used to compose the message.
CustomText = String.Format("Digitally signed by {0}", cert.SubjectName.CommonName),
// Specify that the signing time should also be rendered.
IncludeSigningTime = true,
// Optionally set the horizontal alignment of the text ('Left' or 'Right'), if not set the
// default is Left.
HorizontalAlign = PadesTextHorizontalAlign.Left,
// Optionally set the container within the signature rectangle on which to place the text. By
// default, the text can occupy the entire rectangle (how much of the rectangle the text will
// actually fill depends on the length and font size). Below, we specify that the text should
// respect a right margin of 1.5 cm.
Container = new PadesVisualRectangle()
{
Left = 0.2,
Top = 0.2,
Right = 0.2,
Bottom = 0.2
}
},
// Background image of the visual representation.
Image = new PadesVisualImage()
{
// We'll use as background the image in Content/PdfStamp.png.
Content = Storage.GetPdfStampContent(),
// Align the image to the right.
HorizontalAlign = PadesHorizontalAlign.Right
}
};
// Position of the visual represention. We get the footnote position preset and customize it.
var visualPositioning = PadesVisualAutoPositioning.GetFootnote();
visualPositioning.Container.Height = 4.94;
visualPositioning.SignatureRectangleSize.Width = 8.0;
visualPositioning.SignatureRectangleSize.Height = 4.94;
visualRepresentation.Position = visualPositioning;
return(visualRepresentation);
}
/**
* This method defines the visual representation for each signature. For more information, see
* http://pki.lacunasoftware.com/Help/html/98095ec7-2742-4d1f-9709-681c684eb13b.htm
*/
private PadesVisualRepresentation2 getVisualRepresentation(PKCertificate cert)
{
// Create a visual representation.
var visualRepresentation = new PadesVisualRepresentation2()
{
// Text of the visual representation.
Text = new PadesVisualText()
{
CustomText = string.Format("Signed by {0} ({1})", cert.SubjectName.CommonName, cert.PkiBrazil.CPF),
FontSize = 13.0,
// Specify that the signing time should also be rendered.
IncludeSigningTime = true,
// Optionally set the horizontal alignment of the text ('Left' or 'Right'), if not
// set the default is 'Left'.
HorizontalAlign = PadesTextHorizontalAlign.Left,
// Optionally, set the container within the signature rectangle on which to place
// the text. By default, the text can occupy the entire rectangle (how much of the
// rectangle the text will actually fill depends on the length and font size).
// Below, we specify that text should respect a right margin of 1.5 cm.
Container = new PadesVisualRectangle()
{
Left = 0.2,
Top = 0.2,
Right = 0.2,
Bottom = 0.2
}
},
Image = new PadesVisualImage()
{
// We'll use as background the image in Content/PdfStamp.png.
Content = Storage.GetPdfStampContent(),
// Align the image to the right horizontally.
HorizontalAlign = PadesHorizontalAlign.Right,
// Align the image to center vertically.
VerticalAlign = PadesVerticalAlign.Center
},
};
// Position of the visual representation. We get the footnote position preset and
// customize it.
var visualPositioning = PadesVisualAutoPositioning.GetFootnote();
visualPositioning.Container.Height = 4.94;
visualPositioning.SignatureRectangleSize.Width = 8.0;
visualPositioning.SignatureRectangleSize.Height = 4.94;
visualRepresentation.Position = visualPositioning;
return(visualRepresentation);
}
// This function is called by the PAdES samples for PKI SDK. It contains a example of signature visual
// representation. This is only a separate function in order to organize the variaous examples.
public PadesVisualRepresentation2 GetVisualRepresentation(PKCertificate cert)
{
// Create a visual representation.
var visualRepresentation = new PadesVisualRepresentation2()
{
// Text of the visual representation.
Text = new PadesVisualText()
{
CustomText = String.Format("Signed by {0} ({1})", cert.SubjectDisplayName, cert.PkiBrazil.CPF),
FontSize = 13.0,
// Specify that the signing time should also be rendered.
IncludeSigningTime = true,
// Optionally set the horizontal alignment of the text ('Left' or 'Right'), if not set the
// default is Left.
HorizontalAlign = PadesTextHorizontalAlign.Left,
// Optionally set the container within the signature rectangle on which to place the
// text. By default, the text can occupy the entire rectangle (how much of the rectangle the
// text will actually fill depends on the length and font size). Below, we specify that text
// should respect a right margin of 1.5 cm.
Container = new PadesVisualRectangle()
{
Left = 0.2,
Top = 0.2,
Right = 0.2,
Bottom = 0.2
}
},
Image = new PadesVisualImage()
{
// We'll use as background the image in Content/PdfStamp.png
Content = System.IO.File.ReadAllBytes(Path.Combine(_webHostEnvironment.ContentRootPath, "Resources", "PdfStamp.png")),
// Align image to the right horizontally.
HorizontalAlign = PadesHorizontalAlign.Right,
// Align image to center vertically.
VerticalAlign = PadesVerticalAlign.Center
}
};
// Position of the visual representation. We get the footnote position preset and customize it.
var visualPositioning = PadesVisualAutoPositioning.GetFootnote();
visualPositioning.Container.Height = 4.94;
visualPositioning.SignatureRectangleSize.Width = 8.0;
visualPositioning.SignatureRectangleSize.Height = 4.94;
visualRepresentation.Position = visualPositioning;
return(visualRepresentation);
}
private static PadesVisualRepresentation2 CreateVisualRepresentation(PKCertificate signerCertificate, string visualRep, bool metadata = false)
{
var name = signerCertificate.PkiBrazil.CompanyName ?? signerCertificate.PkiBrazil.Responsavel ?? signerCertificate.SubjectDisplayName;
var sb = new StringBuilder();
if (metadata)
{
sb.AppendLine($"Document scanned in accordance with Decree no. 10.278/2020 by {name}");
}
else
{
sb.AppendLine($"Digitally signed by:\n{name.ToUpper()}");
}
var position = PadesVisualAutoPositioning.GetFootnote();
position.HorizontalDirection = AutoPositioningHorizontalDirections.RightToLeft;
PadesVisualRepresentationModel2 vrModel;
if (!string.IsNullOrEmpty(visualRep) && Util.FileExists(visualRep))
{
try {
var vrContent = File.ReadAllBytes(visualRep);
var visualRepJson = Encoding.UTF8.GetString(vrContent);
vrModel = JsonConvert.DeserializeObject <PadesVisualRepresentationModel2>(visualRepJson);
} catch (Exception ex) {
Log(ex.ToString());
Console.WriteLine($"Error parsing visual representation parameters file: {ex}");
Console.WriteLine($"Using default visual representation parameters.");
vrModel = new PadesVisualRepresentationModel2();
}
}
else
{
vrModel = new PadesVisualRepresentationModel2();
}
return(vrModel.ToEntity(sb.ToString()));
}
public IHttpActionResult Start(BatchSignatureStartRequest request)
{
byte[] toSignBytes, transferData;
SignatureAlgorithm signatureAlg;
try {
// Decode the user's certificate
var cert = PKCertificate.Decode(request.CertContent);
// Instantiate a PadesSigner class
var padesSigner = new PadesSigner();
// Set the PDF to sign, which in the case of this example is one of the batch documents
padesSigner.SetPdfToSign(Storage.GetBatchDocContent(request.Id));
// Set the signer certificate
padesSigner.SetSigningCertificate(cert);
// Set the signature policy
padesSigner.SetPolicy(getSignaturePolicy());
// Set the signature's visual representation options (this is optional). For more information, see
// http://pki.lacunasoftware.com/Help/html/98095ec7-2742-4d1f-9709-681c684eb13b.htm
var visual = new PadesVisualRepresentation2()
{
// Text of the visual representation
Text = new PadesVisualText()
{
// Compose the message
CustomText = $"Assinado digitalmente por {cert.SubjectDisplayName}",
// Specify that the signing time should also be rendered
IncludeSigningTime = true,
// Optionally set the horizontal alignment of the text ('Left' or 'Right'), if not set the default is Left
HorizontalAlign = PadesTextHorizontalAlign.Left
},
// Background image of the visual representation
Image = new PadesVisualImage()
{
// We'll use as background the image in Content/PdfStamp.png
Content = Storage.GetPdfStampContent(),
// Opacity is an integer from 0 to 100 (0 is completely transparent, 100 is completely opaque).
Opacity = 50,
// Align the image to the right
HorizontalAlign = PadesHorizontalAlign.Right
},
// Set the position of the visual representation
Position = PadesVisualAutoPositioning.GetFootnote()
};
padesSigner.SetVisualRepresentation(visual);
// Generate the "to-sign-bytes". This method also yields the signature algorithm that must
// be used on the client-side, based on the signature policy, as well as the "transfer data",
// a byte-array that will be needed on the next step.
toSignBytes = padesSigner.GetToSignBytes(out signatureAlg, out transferData);
} catch (ValidationException ex) {
// Some of the operations above may throw a ValidationException, for instance if the certificate
// encoding cannot be read or if the certificate is expired.
var message = Request.CreateErrorResponse(HttpStatusCode.InternalServerError, ex.ValidationResults.ToString());
return(ResponseMessage(message));
}
// For the next steps, we'll need once again some information:
// - The "transfer data" filename. Its content is stored in a temporary file (with extension .bin) to
// be shared with the Complete action.
// - The "to-sign-hash" (digest of the "to-sign-bytes"). And the OID of the digest algorithm to be
// used during the signature operation. this information is need in the signature computation with
// Web PKI component. (see batch-signature-form.js)
return(Ok(new BatchSignatureStartResponse()
{
TransferDataFileId = Storage.StoreFile(transferData, ".bin"),
ToSignHash = signatureAlg.DigestAlgorithm.ComputeHash(toSignBytes),
DigestAlgorithmOid = signatureAlg.DigestAlgorithm.Oid
}));
}
public ActionResult Index(SignatureStartModel model)
{
byte[] toSignBytes, transferData;
SignatureAlgorithm signatureAlg;
try {
// Decode the user's certificate
var cert = PKCertificate.Decode(model.CertContent);
// Instantiate a PadesSigner class
var padesSigner = new PadesSigner();
// Set the PDF to sign, which in the case of this example is a fixed sample document
padesSigner.SetPdfToSign(Storage.GetSampleDocContent());
// Set the signer certificate
padesSigner.SetSigningCertificate(cert);
// Set the signature policy
padesSigner.SetPolicy(getSignaturePolicy());
// Set the signature's visual representation options (this is optional). For more information, see
// http://pki.lacunasoftware.com/Help/html/98095ec7-2742-4d1f-9709-681c684eb13b.htm
var visual = new PadesVisualRepresentation2()
{
// Text of the visual representation
Text = new PadesVisualText()
{
// Compose the message
CustomText = String.Format("Assinado digitalmente por {0}", cert.SubjectDisplayName),
// Specify that the signing time should also be rendered
IncludeSigningTime = true,
// Optionally set the horizontal alignment of the text ('Left' or 'Right'), if not set the default is Left
HorizontalAlign = PadesTextHorizontalAlign.Left
},
// Background image of the visual representation
Image = new PadesVisualImage()
{
// We'll use as background the image in Content/PdfStamp.png
Content = Storage.GetPdfStampContent(),
// Opacity is an integer from 0 to 100 (0 is completely transparent, 100 is completely opaque).
Opacity = 50,
// Align the image to the right
HorizontalAlign = PadesHorizontalAlign.Right
},
// Set the position of the visual representation
Position = PadesVisualAutoPositioning.GetFootnote()
};
padesSigner.SetVisualRepresentation(visual);
// Generate the "to-sign-bytes". This method also yields the signature algorithm that must
// be used on the client-side, based on the signature policy, as well as the "transfer data",
// a byte-array that will be needed on the next step.
toSignBytes = padesSigner.GetToSignBytes(out signatureAlg, out transferData);
} catch (ValidationException ex) {
// Some of the operations above may throw a ValidationException, for instance if the certificate
// encoding cannot be read or if the certificate is expired.
ModelState.AddModelError("", ex.ValidationResults.ToString());
return(View());
}
// On the next step (Complete action), we'll need once again some information:
// - The content of the selected certificate only used to render the user's certificate information
// after the signature is completed. It is no longer needed for the signature process.
// - The thumbprint of the selected certificate.
// - The "transfer data" used to validate the signature in complete action.
// - The "to-sign-hash" (digest of the "to-sign-bytes") to be signed. (see signature-complete-form.js)
// - The OID of the digest algorithm to be used during the signature operation.
// We'll store these values on TempData, which is a dictionary shared between actions.
TempData["SignatureCompleteModel"] = new SignatureCompleteModel()
{
CertContent = model.CertContent,
CertThumb = model.CertThumb,
TransferData = transferData,
ToSignHash = signatureAlg.DigestAlgorithm.ComputeHash(toSignBytes),
DigestAlgorithmOid = signatureAlg.DigestAlgorithm.Oid
};
return(RedirectToAction("Complete"));
}