/// <summary>
/// Decrypt from loaded AxCryptDocument to a destination file
/// </summary>
/// <param name="document">The loaded AxCryptDocument</param>
/// <param name="destinationFile">The destination file</param>
public static void Decrypt(AxCryptDocument document, IRuntimeFileInfo destinationFile, AxCryptOptions options, ProgressContext progress)
{
if (document == null)
{
throw new ArgumentNullException("document");
}
if (destinationFile == null)
{
throw new ArgumentNullException("destinationFile");
}
if (progress == null)
{
throw new ArgumentNullException("progress");
}
try
{
if (OS.Log.IsInfoEnabled)
{
OS.Log.LogInfo("Decrypting to '{0}'.".InvariantFormat(destinationFile.Name));
}
using (Stream destinationStream = destinationFile.OpenWrite())
{
document.DecryptTo(destinationStream, progress);
}
if (OS.Log.IsInfoEnabled)
{
OS.Log.LogInfo("Decrypted to '{0}'.".InvariantFormat(destinationFile.Name));
}
}
catch (OperationCanceledException)
{
if (destinationFile.Exists)
{
AxCryptFile.Wipe(destinationFile, progress);
}
throw;
}
if (options.HasMask(AxCryptOptions.SetFileTimes))
{
DocumentHeaders headers = document.DocumentHeaders;
destinationFile.SetFileTimes(headers.CreationTimeUtc, headers.LastAccessTimeUtc, headers.LastWriteTimeUtc);
}
}
public static void WriteToFileWithBackup(IRuntimeFileInfo destinationFileInfo, Action <Stream> writeFileStreamTo, ProgressContext progress)
{
if (destinationFileInfo == null)
{
throw new ArgumentNullException("destinationFileInfo");
}
if (writeFileStreamTo == null)
{
throw new ArgumentNullException("writeFileStreamTo");
}
string temporaryFilePath = MakeAlternatePath(destinationFileInfo, ".tmp");
IRuntimeFileInfo temporaryFileInfo = OS.Current.FileInfo(temporaryFilePath);
try
{
using (Stream temporaryStream = temporaryFileInfo.OpenWrite())
{
writeFileStreamTo(temporaryStream);
}
}
catch (OperationCanceledException)
{
if (temporaryFileInfo.Exists)
{
AxCryptFile.Wipe(temporaryFileInfo, progress);
}
throw;
}
if (destinationFileInfo.Exists)
{
string backupFilePath = MakeAlternatePath(destinationFileInfo, ".bak");
IRuntimeFileInfo backupFileInfo = OS.Current.FileInfo(destinationFileInfo.FullName);
backupFileInfo.MoveTo(backupFilePath);
temporaryFileInfo.MoveTo(destinationFileInfo.FullName);
AxCryptFile.Wipe(backupFileInfo, progress);
}
else
{
temporaryFileInfo.MoveTo(destinationFileInfo.FullName);
}
}
