protected void SubmitButton_Click(object sender, EventArgs e)
{
// Get an instance of the PadesSignatureFinisher class, responsible for completing the signature process
var signatureFinisher = Util.GetRestPkiClient().GetPadesSignatureFinisher();
// Set the token for this signature (rendered in a hidden input field, see the view)
signatureFinisher.SetToken((string)ViewState["Token"]);
// Call the Finish() method, which finalizes the signature process and returns the signed PDF
var signedPdf = signatureFinisher.Finish();
// Get information about the certificate used by the user to sign the file. This method must only be called after
// calling the Finish() method.
var signerCert = signatureFinisher.GetCertificateInfo();
// At this point, you'd typically store the signed PDF on your database. For demonstration purposes, we'll
// store the PDF on the App_Data folder and render a page with a link to download the signed PDF and with the
// signer's certificate details.
var appDataPath = Server.MapPath("~/App_Data");
if (!Directory.Exists(appDataPath)) {
Directory.CreateDirectory(appDataPath);
}
var id = Guid.NewGuid();
var filename = id + ".pdf";
System.IO.File.WriteAllBytes(Path.Combine(appDataPath, filename), signedPdf);
this.SignatureFilename = filename;
this.SignerCertificate = signerCert;
Server.Transfer("PadesSignatureInfo.aspx");
}
protected void Page_Load(object sender, EventArgs e)
{
this.signatureFilename = PreviousPage.SignatureFilename;
this.signerCertificate = PreviousPage.SignerCertificate;
}
public CertificateSummary(PKCertificate cert)
{
SubjectCommonName = cert.SubjectName.CommonName;
SubjectDisplayName = cert.SubjectDisplayName;
Thumbprint = string.Join("", cert.ThumbprintSHA1.Select(b => b.ToString("X2")));
}
protected void Page_Load(object sender, EventArgs e)
{
this.certificate = PreviousPage.Certificate;
}
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"));
}
protected void Page_Load(object sender, EventArgs e)
{
this.signatureFilename = PreviousPage.SignatureFilename;
this.signerCertificate = PreviousPage.SignerCertificate;
}
private void startNextSignature()
{
// Increment the index of the document currently being signed.
DocumentIndex += 1;
// Check if we have reached the end of the batch, in which case we fill the hidden field
// "ToSignHashField" with value "(end)", which signals to the javascript on batch-signature-form.js
// that the process is completed and the page can be unblocked.
if (DocumentIndex == DocumentIds.Count)
{
ToSignHashField.Value = "(end)";
return;
}
// Get the ID of the document currently being signed.
var docId = DocumentIds[DocumentIndex];
byte[] toSignBytes;
SignatureAlgorithm signatureAlg;
try {
// Decode the user's certificate.
var cert = PKCertificate.Decode(Convert.FromBase64String(CertificateField.Value));
// Instantiate a CadesSigner class.
var cadesSigner = new CadesSigner();
// Set the data to sign, which in the case of this example is a fixed sample document.
cadesSigner.SetDataToSign(Storage.GetBatchDocContent(docId));
// Set the signer certificate.
cadesSigner.SetSigningCertificate(cert);
// Set the signature policy.
cadesSigner.SetPolicy(getSignaturePolicy());
// 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.
toSignBytes = cadesSigner.GenerateToSignBytes(out signatureAlg);
}
catch (ValidationException ex) {
// One or more validations failed. We log the error, update the page with a summary of what
// happened to this document and start the next signature.
logger.Error(ex, "Validation error starting the signature of a batch document");
setValidationError(ex.ValidationResults);
startNextSignature();
return;
}
catch (Exception ex) {
// An error has occurred. We log the error, update the page with a summary of what happened to
// this document and start the next signature.
logger.Error(ex, "Error starting the signature of a batch document");
setError(ex.Message);
startNextSignature();
return;
}
// Send to the javascript the "to sign hash" of the document (digest of the "to-sign-bytes") and the
// digest algorithm that must be used on the signature algorithm computation.
ToSignBytesField.Value = Convert.ToBase64String(toSignBytes);
ToSignHashField.Value = Convert.ToBase64String(signatureAlg.DigestAlgorithm.ComputeHash(toSignBytes));
DigestAlgorithmField.Value = signatureAlg.DigestAlgorithm.Oid;
}
private void completeSignature()
{
// Get the ID of the document currently being signed.
var docId = DocumentIds[DocumentIndex];
PKCertificate cert;
byte[] signatureContent;
try {
// Decode the user's certificate.
cert = PKCertificate.Decode(Convert.FromBase64String(CertificateField.Value));
// Instantiate a CadesSigner class.
var cadesSigner = new CadesSigner();
// Set the document to be signed and the policy, exactly like in the previous action
// (SubmitCertificateButton_Click).
cadesSigner.SetDataToSign(Storage.GetBatchDocContent(docId));
cadesSigner.SetPolicy(getSignaturePolicy());
// Set the signer certificate.
cadesSigner.SetSigningCertificate(cert);
// Optionally, set whether the content should be encapsulated in the resulting CMS.
cadesSigner.SetEncapsulatedContent(false);
// Set the signature computed on the client-side, along with the "to-sign-bytes" recovered from
// the page.
cadesSigner.SetPrecomputedSignature(Convert.FromBase64String(SignatureField.Value), Convert.FromBase64String(ToSignBytesField.Value));
// Call ComputeSignature(), which does all the work, including validation of the signer's
// certificate and of the resulting signature.
cadesSigner.ComputeSignature();
// Get the signature as an array of bytes.
signatureContent = cadesSigner.GetSignature();
}
catch (ValidationException ex) {
// One or more validations failed. We log the error and update the page with a summary of what
// happened to this document.
logger.Error(ex, "Validation error completing the signature of a batch document");
setValidationError(ex.ValidationResults);
return;
}
catch (Exception ex) {
// An error has occurred. We log the error and update the page with a summary of what happened to
// this document.
logger.Error(ex, "Error completing the signature of a batch document");
setError(ex.Message);
return;
}
// Store the signed file.
var file = Storage.StoreFile(signatureContent, ".p7s");
// Update the page with a link to the signed file.
var docItem = DocumentsListView.Items[DocumentIndex];
docItem.DataItem = new DocumentItem()
{
Id = DocumentIds[DocumentIndex],
DownloadLink = "Download?file=" + file
};
docItem.DataBind();
}
private void startNextSignature()
{
// Increment the index of the document currently being signed.
DocumentIndex += 1;
// Check if we have reached the end of the batch, in which case we fill the hidden field
// "ToSignHashField" with value "(end)", which signals to the javascript on batch-signature-form.js
// that the process is completed and the page can be unblocked.
if (DocumentIndex == DocumentIds.Count)
{
ToSignHashField.Value = "(end)";
return;
}
// Get the ID of the document currently being signed.
var docId = DocumentIds[DocumentIndex];
byte[] toSignBytes, transferData;
SignatureAlgorithm signatureAlg;
try {
// Decode the user's certificate.
var cert = PKCertificate.Decode(Convert.FromBase64String(CertificateField.Value));
// Instantiate a PadesSigner class.
var padesSigner = new PadesSigner();
// Set the PDF to sign.
padesSigner.SetPdfToSign(Storage.GetBatchDocContent(docId));
// Set the signer certificate.
padesSigner.SetSigningCertificate(cert);
// Set the signature policy.
padesSigner.SetPolicy(getSignaturePolicy());
// Set the signature's visual representation options (optional).
padesSigner.SetVisualRepresentation(getVisualRepresentation(cert));
// 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) {
// One or more validations failed. We log the error, update the page with a summary of what
// happened to this document and start the next signature.
logger.Error(ex, "Validation error starting the signature of a batch document");
setValidationError(ex.ValidationResults);
startNextSignature();
return;
}
catch (Exception ex) {
// An error has occurred. We log the error, update the page with a summary of what happened to
// this document and start the next signature.
logger.Error(ex, "Error starting the signature of a batch document");
setError(ex.Message);
startNextSignature();
return;
}
// The "transfer data" for PDF signatures can be as large as the original PDF itself. Therefore, we
// mustn't use a hidden field on the page to store it. Here we're using our storage mock
// (see file Classes\Storage.cs) to simulate storing the transfer data on a database and saving on a
// hidden field on the page only the ID that can be used later to retrieve it. Another option would
// be to store the transfer data on the Session dictionary.
TransferDataFileIdField.Value = Storage.StoreFile(transferData);
// Send to the javascript the "to sign hash" of the document (digest of the "to-sign-bytes") and the
// digest algorithm that must be used on the signature algorithm computation
ToSignHashField.Value = Convert.ToBase64String(signatureAlg.DigestAlgorithm.ComputeHash(toSignBytes));
DigestAlgorithmField.Value = signatureAlg.DigestAlgorithm.Oid;
}
public ActionResult Start(SignatureStartModel model)
{
byte[] toSignBytes, transferData;
SignatureAlgorithm signatureAlg;
try {
// Verify if the userfile exists and get its absolute path.
string userfilePath;
if (!StorageMock.TryGetFile(model.UserFile, out userfilePath))
{
return(HttpNotFound());
}
// Decode the user's certificate.
var cert = PKCertificate.Decode(model.CertContent);
// Get an instance of the PadesSigner class.
var padesSigner = new PadesSigner();
// Set the file to be signed.
padesSigner.SetPdfToSign(userfilePath);
// REQUIRED!
// Provide the signer's certificate. You must sign with a valid digital
// certificate of a doctor, who was registered on CRM. In this sample,
// we used a sample certificate stored on server to do the execute this
// sample.
padesSigner.SetSigningCertificate(cert);
// REQUIRED!
// Define the trust arbitrator, which will configure the signer to
// some kind of certificate. In the case of this sample, only
// ICP-Brasil certificates will be accepted in the defined standard.
var trustArbitrator = new LinkedTrustArbitrator(TrustArbitrators.PkiBrazil);
#if DEBUG
// For development purposes, we also trust in Lacuna Software's test certificates.
var lacunaRoot = Lacuna.Pki.PKCertificate.Decode(Convert.FromBase64String("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"));
trustArbitrator.Add(new TrustedRoots(lacunaRoot));
#endif
// REQUIRED!
// Use a policy accepted by ICP-Brasil. We use the trust arbitrator
// defined above to configure the policy.
padesSigner.SetPolicy(PadesPoliciesForGeneration.GetPadesBasic(trustArbitrator));
// REQUIRED!
// Use a custom signature field name. This field MUST have the
// "Emitente" keyword as the last keyword.
padesSigner.SetCustomSignatureFieldName("Signature1 Emitente");
// REQUIRED!
// Set Certification Level to not allow changes after signed.
padesSigner.SetCertificationLevel(PadesCertificationLevel.CertifiedNoChangesAllowed);
// Set a visual representation for the signature.
padesSigner.SetVisualRepresentation(PadesVisualElements.GetVisualRepresentationForPkiSdk(cert));
// 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 thumbprint of the selected certificate.
// - The "transfer data" used to validate the signature in complete action. 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") 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()
{
CertThumb = model.CertThumb,
TransferDataFileId = StorageMock.Store(transferData, ".bin"),
ToSignHash = signatureAlg.DigestAlgorithm.ComputeHash(toSignBytes),
DigestAlgorithmOid = signatureAlg.DigestAlgorithm.Oid
};
return(RedirectToAction("Complete", new { userfile = model.UserFile }));
}
public ActionResult Index(SignatureStartModel model)
{
byte[] toSignBytes;
SignatureAlgorithm signatureAlg;
try {
// Instantiate a CadesSigner class
var cadesSigner = new CadesSigner();
if (!string.IsNullOrEmpty(model.CmsFile))
{
// Verify if the cmsfile exists and get the content of the cmsfile.
byte[] cmsfileContent;
if (!StorageMock.TryGetFile(model.CmsFile, out cmsfileContent))
{
return(HttpNotFound());
}
// If the URL argument "cmsfile" is filled, the user has asked to co-sign a previously signed
// CMS. We'll set the path to the CMS to be co-signed, which was perviously saved in the
// App_Data folder by the POST action on this controller.
cadesSigner.SetSignatureToCoSign(cmsfileContent);
}
else
{
// Verify if the userfile exists and get the content of the userfile.
byte[] userfileContent;
if (!StorageMock.TryGetFile(model.UserFile, out userfileContent))
{
return(HttpNotFound());
}
// If the URL argument "userfile" is filled, it means the user was redirected here by
// UploadController (signature with file uploaded by user). We'll set the path of the file to
// be signed, which was saved in the App_Data folder by UploadController.
cadesSigner.SetDataToSign(userfileContent);
}
// Decode the user's certificate and set as the signer certificate.
var cert = PKCertificate.Decode(model.CertContent);
cadesSigner.SetSigningCertificate(cert);
// Set the signature policy
cadesSigner.SetPolicy(getSignaturePolicy());
// 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.
toSignBytes = cadesSigner.GenerateToSignBytes(out signatureAlg);
} 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 used to validate the signature in complete action.
// - The thumbprint of the selected certificate.
// - The "to-sign-bytes" 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()
{
UserFile = model.UserFile,
CmsFile = model.CmsFile,
CertContent = model.CertContent,
CertThumb = model.CertThumb,
ToSignBytes = toSignBytes,
ToSignHash = signatureAlg.DigestAlgorithm.ComputeHash(toSignBytes),
DigestAlgorithmOid = signatureAlg.DigestAlgorithm.Oid
};
return(RedirectToAction("Complete", new { userfile = model.UserFile, cmsfile = model.CmsFile }));
}
public ActionResult Complete(SignatureCompleteModel model)
{
byte[] signatureContent;
try {
// Instantiate a CadesSigner class
var cadesSigner = new CadesSigner();
// Set the document to be signed, exactly like in the Start method
if (!string.IsNullOrEmpty(model.CmsFile))
{
// Verify if the cmsfile exists and get the content of the cmsfile.
byte[] cmsfileContent;
if (!StorageMock.TryGetFile(model.CmsFile, out cmsfileContent))
{
return(HttpNotFound());
}
// If the URL argument "cmsfile" is filled, the user has asked to co-sign a previously signed
// CMS. We'll set the path to the CMS to be co-signed, which was perviously saved in the
// App_Data folder by the POST action on this controller.
cadesSigner.SetSignatureToCoSign(cmsfileContent);
}
else
{
// Verify if the userfile exists and get the content of the userfile.
byte[] userfileContent;
if (!StorageMock.TryGetFile(model.UserFile, out userfileContent))
{
return(HttpNotFound());
}
// If the URL argument "userfile" is filled, it means the user was redirected here by
// UploadController (signature with file uploaded by user). We'll set the path of the file to
// be signed, which was saved in the App_Data folder by UploadController.
cadesSigner.SetDataToSign(userfileContent);
}
// Set the signature policy, exactly like in the Start method.
cadesSigner.SetPolicy(getSignaturePolicy());
// Decode the user's certificate and set as the signer certificate.
var cert = PKCertificate.Decode(model.CertContent);
cadesSigner.SetSigningCertificate(cert);
// Set the signature computed on the client-side, along with the "to-sign-bytes" (rendered in a hidden input field, see the view)
cadesSigner.SetPrecomputedSignature(model.Signature, model.ToSignBytes);
// Call ComputeSignature(), which does all the work, including validation of the signer's certificate and of the resulting signature
cadesSigner.ComputeSignature();
// Get the signature as an array of bytes
signatureContent = cadesSigner.GetSignature();
} catch (ValidationException ex) {
// Some of the operations above may throw a ValidationException, for instance if the certificate is revoked.
ModelState.AddModelError("", ex.ValidationResults.ToString());
// Return userfile to continue the signature with the same file.
return(View("Complete", model));
}
// On the next step (SignatureInfo action), we'll render the following information:]
// - The filename to be available to download in next action.
// We'll store these values on TempData, which is a dictionary shared between actions.
TempData["SignatureInfoModel"] = new SignatureInfoModel()
{
// Store the signature file on the folder "App_Data/" and redirects to the SignatureInfo action with the filename.
// With this filename, it can show a link to download the signature file.
File = StorageMock.Store(signatureContent, ".p7s")
};
return(RedirectToAction("SignatureInfo"));
}
public void ValidateAttributeCert()
{
if (!checkLicenseLoaded())
{
return;
}
try {
var certFileDialog = new OpenFileDialog()
{
DefaultExt = ".ac",
Filter = "X.509 attribute certificate (.ac)|*.ac"
};
if (certFileDialog.ShowDialog() != true)
{
return;
}
// Read and decode the attribute certificate
var certContent = File.ReadAllBytes(certFileDialog.FileName);
var cert = AttributeCertificate.Decode(certContent);
// If the certificate is issued without a link to its issuer (AIA extension), the validation will fail because the issuer will not be found. In this
// case, have to provide the issuer certificate when decoding the attribute certificate.
if (cert.IssuerNotFound)
{
MessageBox.Show("Could not find the issuer of the certificate. This usually happens with certificates that do not have a valid Authority Information Access (AIA) extension.\n\nTo continue, you will need to provide the .cer file of the issuer.", "Issuer not found");
var issuerFileDialog = new OpenFileDialog()
{
DefaultExt = ".cer",
Filter = "X.509 certificate|*.cer;*.crt"
};
if (issuerFileDialog.ShowDialog() != true)
{
return;
}
// Read and decode the issuer certificate
var issuerContent = File.ReadAllBytes(issuerFileDialog.FileName);
var issuerCert = PKCertificate.Decode(issuerContent);
// Re-open the attribute certificate providing the issuer certificate
cert = AttributeCertificate.Decode(certContent, new MemoryCertificateStore(new[] { issuerCert }));
}
CieStudentIdentity cieStudentIdentity = null;
if (cert.Attributes.GetOids().Contains(CieStudentIdentity.Oid))
{
cieStudentIdentity = CieStudentIdentity.Decode(cert.Attributes);
}
CieStudentData cieStudentData = null;
if (cert.Attributes.GetOids().Contains(CieStudentData.Oid))
{
cieStudentData = CieStudentData.Decode(cert.Attributes);
}
// Validate the certificate
var vr = cert.Validate(App.GetTrustArbitrator());
// Show the validation results
new ValidationResultsDialog("Attribute certificate validation results", vr).ShowDialog();
} catch (Exception ex) {
MessageBox.Show(ex.ToString(), "An error has occurred");
}
}