public ActionResult DevEditPost(DevEditViewModel editVm)
{
var repo = new Repository();
var original = GetDevEditViewModel(editVm.Id);
original.Message = editVm.Message;
var asc = new WebClient().DownloadData(repo.GetASCLink(editVm.Id));
string extracted;
if(!CryptoHelper.VerifySig(asc, editVm.Message, out extracted))
{
ModelState.AddModelError("Message", "Incorrectly signed");
}
else
{
byte[] hash = null;
using(SHA256 sha = new SHA256Managed())
{
hash = sha.ComputeHash(Encoding.UTF8.GetBytes(extracted));
}
if(repo.SaveHash(hash))
{
repo.UpdateDevViewModel(original);
return RedirectToAction("Dev", "Main", new
{
devId = editVm.Id
});
}
else
{
ModelState.AddModelError("Message", "You can't replay an old message");
}
}
return View("DevEdit", original);
}
private static DevEditViewModel GetDevEditViewModel(string devId)
{
var repo = new Repository();
var vm = repo.GetDevViewModel(devId);
var editVm = new DevEditViewModel();
editVm.Id = vm.Id;
editVm.FriendlyName = vm.FriendlyName;
editVm.MessageLink = vm.MessageLink;
editVm.ASCLink = vm.ASCLink;
if(vm.Message != null)
editVm.Message = repo.GetSig(editVm.Id);
editVm.SignatureSample = repo.GetSigLink("zsample");
editVm.ResultSample = "/Opinion/zsample";
return editVm;
}
public void UpdateDevViewModel(DevEditViewModel dev)
{
var bytes = Encoding.UTF8.GetBytes(dev.Message);
var sigBlob = GetSigBlob(dev.Id);
//hashBlob.Properties.ContentEncoding = "text/html; charset=UTF-8";
sigBlob.UploadFromByteArray(bytes, 0, bytes.Length);
}
