/// <exception cref="IOException">
/// Thrown if a network error occurs or the SHA-1 hash of the downloaded file
/// does not match the expected value in the update manifest.
/// </exception>
private void DownloadUpdateSync(Update update)
{
_cancellationTokenSource = new CancellationTokenSource();
var path = Path.Combine(Path.GetTempPath(), update.FileName);
var downloader = new FileDownloader
{
Uri = update.Uri,
Path = path,
CancellationToken = _cancellationTokenSource.Token
};
downloader.BeforeRequest += NotifyBeforeRequest;
downloader.ProgressChanged += DownloaderOnProgressChanged;
downloader.DownloadSync();
if (downloader.State != FileDownloadState.Success)
return;
var hash = new SHA1Algorithm().ComputeFile(path);
if (!String.Equals(hash, update.SHA1, StringComparison.OrdinalIgnoreCase))
{
_logger.ErrorFormat(
"Unable to verify integrity of \"{0}\" via SHA-1 hash: expected {1}, but found {2}",
path, update.SHA1, hash);
throw new IOException("Update file is corrupt or has been tampered with; SHA-1 hash is incorrect");
}
_latestInstallerPath = path;
}
public string CreateTempDirectory(Assembly assembly = null, params string[] subdirectoryNames)
{
var pathHash = new SHA1Algorithm().ComputeText(AssemblyUtils.GetInstallDir());
var folderNames = new List<string>
{
RootTempDirectory,
pathHash.Substring(0, 7),
AssemblyUtils.GetAssemblyName(assembly),
Process.GetCurrentProcess().Id.ToString("0")
};
folderNames.AddRange(subdirectoryNames.Where(s => !string.IsNullOrWhiteSpace(s)));
var path = Combine(folderNames.ToArray());
Directory.CreateDirectory(path);
RegisterTempDirectories(path);
return path;
}
