private async void Sign_Click(object sender, RoutedEventArgs e)
{
X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
X509Certificate2Collection collection = store.Certificates;
X509Certificate2Collection fcollection = collection.Find(X509FindType.FindByKeyUsage, X509KeyUsageFlags.NonRepudiation, true);
X509Certificate2Collection scollection = X509Certificate2UI.SelectFromCollection(fcollection, "Sign Certificate Select", "Select a certificate to sign with", X509SelectionFlag.SingleSelection);
DsspClient dsspClient = new DsspClient("https://www.e-contract.be/dss-ws/dss");
dsspClient.Application.UT.Name = Properties.Settings.Default.user;
dsspClient.Application.UT.Password = Properties.Settings.Default.pwd;
dsspClient.Signer = scollection.Cast <X509Certificate2>().AsQueryable().FirstOrDefault();
using (new WaitCursor())
{
Dssp2StepSession dsspSession;
var signProps = new SignatureRequestProperties();
signProps.SignerRole = this.Role.Text;
signProps.SignatureProductionPlace = this.Location.Text;
using (Stream input = File.OpenRead(FilePath.Text))
{
var inDoc = new Document()
{
MimeType = "application/pdf",
Content = input
};
dsspSession = await dsspClient.UploadDocumentFor2StepAsync(inDoc, signProps);
}
dsspSession.Sign();
var outDoc = await dsspClient.DownloadDocumentAsync(dsspSession);
using (Stream output = File.Create(FilePath.Text))
{
await outDoc.Content.CopyToAsync(output);
}
}
}
public async Task <HttpResponseMessage> Post(string id, [FromBody] FormDataCollection formData)
{
NameIdentifierType newSigner = null;
try
{
foreach (KeyValuePair <String, String> formField in formData)
{
if (formField.Key == "SignResponse")
{
try
{
//check if the sign response is correct, keep the signer
newSigner = sessions[id].ValidateSignResponse(formField.Value);
docs[id].Alert = new Alert()
{
Message = "New signature by " + newSigner.Value, Type = "success"
};
//get the session and remove it from the store
DsspSession session = sessions.Remove(id);
//Download the signed document.
Document doc = await dsspClient.DownloadDocumentAsync(session);
docs[id].Content = doc.Content;
//You should save the signed document about here...
//For demo purposes, lets validate the signature. This is purely optional
SecurityInfo securityInfo = await dsspClient.VerifyAsync(doc);
//Keep some interesting info about the signed document
docs[id].TimeStampValidity = securityInfo.TimeStampValidity;
docs[id].Signatures = new List <SignInfo>();
foreach (SignatureInfo info in securityInfo.Signatures)
{
SignInfo i = new SignInfo();
i.Signer = info.SignerSubject;
i.SignedOn = info.SigningTime;
i.Location = info.SignatureProductionPlace;
i.Role = info.SignerRole;
docs[id].Signatures.Add(i);
}
}
catch (AuthorizationError ae)
{
newSigner = ae.AttemptedSigner;
docs[id].Alert = new Alert()
{
Message = "Failed signature attempt by " + ae.AttemptedSigner.Value, Type = "warning"
};
sessions.Remove(id); //we can remove now, it is no longer valid
}
}
}
if (newSigner == null)
{
docs[id].Alert = new Alert()
{
Message = "No new signature found", Type = "danger"
};
}
}
catch (Exception e)
{
docs[id].Alert = new Alert()
{
Message = "Internal error: " + e.Message, Type = "danger"
};
}
//Redirecting back to the main site (via HTML to make sure "Get" is used instead of POST)
return(RedirectBack());
}
