public UpdateViewModel(Update update)
{
_isSignatureDownloaded = false;
_isInstallerDownloaded = false;
StartUpdateAsync(update);
}
/// <summary>
/// Do an update.
/// </summary>
/// <param name="update">The update to perform.</param>
public async void StartUpdateAsync(Update update)
{
try
{
IsUpdatingSignature = true;
IsUpdatingInstaller = true;
await DownloadSignatureAsync(update.Signature);
await DownloadInstallerAsync(update.Installer);
if ((IsInstallerDownloaded) && (IsSignatureDownloaded))
{
var s = _signature.Split('\n');
var trimmedComment = s[2].Replace("trusted comment: ", "").Trim();
var trustedCommentBinary = Encoding.UTF8.GetBytes(trimmedComment);
var loadedSignature = Minisign.LoadSignature(Convert.FromBase64String(s[1]), trustedCommentBinary,
Convert.FromBase64String(s[3]));
var publicKey = Minisign.LoadPublicKeyFromString(Global.PublicKey);
var valid = Minisign.ValidateSignature(_installer, loadedSignature, publicKey);
if (valid)
{
var path = Path.Combine(Path.GetTempPath(), update.Installer.Name);
File.WriteAllBytes(path, _installer);
if (File.Exists(path))
{
InstallerPath = path;
TryClose(true);
}
}
else
{
//failed
InstallerPath = string.Empty;
}
}
else
{
//failed
InstallerPath = string.Empty;
}
}
catch (Exception)
{
}
TryClose(false);
}
