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 }));
}