public string GetMd5Hash(string value)
{
var hashValue = _cryptoProvider.ComputeMD5(new UTF8Encoding().GetBytes(value));
//Bit convertor return the byte to string as all caps hex values seperated by "-"
return(BitConverter.ToString(hashValue).Replace("-", "").ToLowerInvariant());
}
private Guid GetKey(string featureId)
{
return(new Guid(_cryptographyProvider.ComputeMD5(Encoding.Unicode.GetBytes(featureId))));
}
private async Task PerformPackageInstallation(IProgress <double> progress, string target, PackageVersionInfo package, CancellationToken cancellationToken)
{
// Target based on if it is an archive or single assembly
// zip archives are assumed to contain directory structures relative to our ProgramDataPath
var extension = Path.GetExtension(package.targetFilename);
var isArchive = string.Equals(extension, ".zip", StringComparison.OrdinalIgnoreCase) || string.Equals(extension, ".rar", StringComparison.OrdinalIgnoreCase) || string.Equals(extension, ".7z", StringComparison.OrdinalIgnoreCase);
if (target == null)
{
target = Path.Combine(isArchive ? _appPaths.TempUpdatePath : _appPaths.PluginsPath, package.targetFilename);
}
// Download to temporary file so that, if interrupted, it won't destroy the existing installation
var tempFile = await _httpClient.GetTempFile(new HttpRequestOptions
{
Url = package.sourceUrl,
CancellationToken = cancellationToken,
Progress = progress
}).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
// Validate with a checksum
var packageChecksum = string.IsNullOrWhiteSpace(package.checksum) ? Guid.Empty : new Guid(package.checksum);
if (!packageChecksum.Equals(Guid.Empty)) // support for legacy uploads for now
{
using (var stream = File.OpenRead(tempFile))
{
var check = Guid.Parse(BitConverter.ToString(_cryptographyProvider.ComputeMD5(stream)).Replace("-", string.Empty));
if (check != packageChecksum)
{
throw new Exception(string.Format("Download validation failed for {0}. Probably corrupted during transfer.", package.name));
}
}
}
cancellationToken.ThrowIfCancellationRequested();
// Success - move it to the real target
try
{
Directory.CreateDirectory(Path.GetDirectoryName(target));
File.Copy(tempFile, target, true);
//If it is an archive - write out a version file so we know what it is
if (isArchive)
{
File.WriteAllText(target + ".ver", package.versionStr);
}
}
catch (IOException ex)
{
_logger.LogError(ex, "Error attempting to move file from {TempFile} to {TargetFile}", tempFile, target);
throw;
}
try
{
_fileSystem.DeleteFile(tempFile);
}
catch (IOException ex)
{
// Don't fail because of this
_logger.LogError(ex, "Error deleting temp file {TempFile}", tempFile);
}
}
private byte[] CreateMd5(byte[] value)
{
return(_cryptographyProvider.ComputeMD5(value));
}
