public FileSecureDeleteResult FileSecureDelete(string filePath)
{
FileSecureDeleteResult result = new FileSecureDeleteResult();
result.OriginalPath = filePath;
result.StartTime = DateTime.Now;
try
{
if (File.Exists(filePath))
{
byte[] wipeBuffer = new byte[512];
RNGCryptoServiceProvider randomData = new RNGCryptoServiceProvider();
File.SetAttributes(filePath, FileAttributes.Normal);
FileStream fileToWipeStream = new FileStream(filePath, FileMode.Open);
double blocks = Math.Ceiling(new FileInfo(filePath).Length / 512d);
for (int i = 0; i < MAX_PASSES; i++)
{
fileToWipeStream.Position = 0;
for (int blocksWritten = 0; blocksWritten < blocks; blocksWritten++)
{
randomData.GetBytes(wipeBuffer);
fileToWipeStream.Write(wipeBuffer, 0, wipeBuffer.Length);
}
result.WriteItterations++;
}
fileToWipeStream.SetLength(0);
fileToWipeStream.Close();
DateTime dt = new DateTime(2037, 1, 1, 0, 0, 0);
File.SetCreationTime(filePath, dt);
File.SetLastAccessTime(filePath, dt);
File.SetLastWriteTime(filePath, dt);
File.SetCreationTimeUtc(filePath, dt);
File.SetLastAccessTimeUtc(filePath, dt);
File.SetLastWriteTimeUtc(filePath, dt);
string newFilePath = filePath;
for (int i = 0; i < MAX_PASSES; i++)
{
string tempPath = Path.GetDirectoryName(newFilePath) + Guid.NewGuid();
File.Move(newFilePath, Path.GetDirectoryName(newFilePath) + tempPath);
newFilePath = tempPath;
result.RenameItterations++;
}
File.Delete(newFilePath);
if (File.Exists(newFilePath))
{
result.DeleteSuccessful = false;
result.ErrorMessage = string.Format("File {0} existed after Delete message sent.", newFilePath);
}
}
}
catch (Exception ex)
{
result.DeleteSuccessful = false;
result.ErrorMessage = ex.ToString();
result.Error = ex;
}
result.EndTime = DateTime.Now;
return(result);
}
public FileSecureDeleteResult FileSecureDelete(string filePath)
{
FileSecureDeleteResult result = new FileSecureDeleteResult();
result.OriginalPath = filePath;
result.StartTime = DateTime.Now;
try
{
if (File.Exists(filePath))
{
byte[] wipeBuffer = new byte[512];
RNGCryptoServiceProvider randomData = new RNGCryptoServiceProvider();
File.SetAttributes(filePath, FileAttributes.Normal);
FileStream fileToWipeStream = new FileStream(filePath, FileMode.Open);
double blocks = Math.Ceiling(new FileInfo(filePath).Length / 512d);
for (int i = 0; i < MAX_PASSES; i++)
{
fileToWipeStream.Position = 0;
for (int blocksWritten = 0; blocksWritten < blocks; blocksWritten++)
{
randomData.GetBytes(wipeBuffer);
fileToWipeStream.Write(wipeBuffer, 0, wipeBuffer.Length);
}
result.WriteItterations++;
}
fileToWipeStream.SetLength(0);
fileToWipeStream.Close();
DateTime dt = new DateTime(2037, 1, 1, 0, 0, 0);
File.SetCreationTime(filePath, dt);
File.SetLastAccessTime(filePath, dt);
File.SetLastWriteTime(filePath, dt);
File.SetCreationTimeUtc(filePath, dt);
File.SetLastAccessTimeUtc(filePath, dt);
File.SetLastWriteTimeUtc(filePath, dt);
string newFilePath = filePath;
for (int i = 0; i < MAX_PASSES; i++)
{
string tempPath = Path.GetDirectoryName(newFilePath) + Guid.NewGuid();
File.Move(newFilePath, Path.GetDirectoryName(newFilePath) + tempPath);
newFilePath = tempPath;
result.RenameItterations++;
}
File.Delete(newFilePath);
if (File.Exists(newFilePath))
{
result.DeleteSuccessful = false;
result.ErrorMessage = string.Format("File {0} existed after Delete message sent.", newFilePath);
}
}
}
catch (Exception ex)
{
result.DeleteSuccessful = false;
result.ErrorMessage = ex.ToString();
result.Error = ex;
}
result.EndTime = DateTime.Now;
return result;
}
