public async Task <ActionResult> Index(SignatureModel model)
{
// Get an instance of the XmlSignatureFinisher class, responsible for completing the signature
// process.
var signatureFinisher = new XmlSignatureFinisher(Util.GetRestPkiClient())
{
// Set the token for this signature (rendered in a hidden input field, see the view).
Token = model.Token
};
// Call the Finish() method, which finalizes the signature process and returns the signed PDF.
var signedXml = await signatureFinisher.FinishAsync();
// Get information about the signer's certificate used. This method must only be called after
// calling the Finish() method.
var signerCert = signatureFinisher.GetCertificateInfo();
// At this point, you'd typically store the signed XML on your database. For demonstration
// purposes, we'll store the PDF on our mock Storage class.
var fileId = StorageMock.Store(signedXml, ".xml");
// Render the signature information page.
return(View("SignatureInfo", new SignatureInfoModel()
{
File = fileId,
SignerCertificate = signerCert
}));
}
public async Task <SignatureCompleteResponse> Complete(string token)
{
var storage = new Storage(hostingEnvironment);
var client = Util.GetRestPkiClient(restPkiConfig);
// Get an instance of the XmlSignatureFinisher class, responsible for completing the signature process
var signatureFinisher = new XmlSignatureFinisher(client)
{
// Set the token for this signature (acquired previously and passed back here by the angular controller)
Token = token
};
// Call the FinishAsync() method, which finalizes the signature process and returns a SignatureResult object
var signedXmlBytes = await signatureFinisher.FinishAsync();
// The "Certificate" property of the SignatureResult object contains information about the certificate used by the user
// to sign the file.
var signerCert = signatureFinisher.GetCertificateInfo();
// At this point, you'd typically store the signed XML on a database or storage service. For demonstration purposes, we'll
// store the XML on our "storage mock", which in turn stores the XML on the App_Data folder.
// The SignatureResult object has various methods for writing the signature file to a stream (WriteToAsync()), local file (WriteToFileAsync()),
// open a stream to read the content (OpenReadAsync()) and get its contents (GetContentAsync()). Avoid the method GetContentAsync() to prevent
// memory allocation issues with large files.
var filename = await storage.StoreAsync(signedXmlBytes, ".xml");
// Pass the following fields to be used on signature-results template:
// - The signature filename, which can be used to provide a link to the file
// - The user's certificate
var response = new SignatureCompleteResponse()
{
Filename = filename,
Certificate = new Models.CertificateModel(signerCert)
};
return(response);
}
