private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Error != null)
{
// System.Security.Cryptography.CryptographicException: Padding is invalid and cannot be removed.
if (!(e.Error is CryptographicException))
{
MessageBox.Show(e.Error.ToString());
}
}
else
{
CryptoAction action = (CryptoAction)e.Result;
if (action.ActionType == CryptoActionType.Encrypt)
{
IsEncrypted = true;
}
else if (action.ActionType == CryptoActionType.Decrypt)
{
IsEncrypted = false;
}
}
IsCrypting = false;
if (!IsEncrypted)
{
CryptProgress = -0.05;
}
StateChange();
}
private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
CryptoAction action = (CryptoAction)e.Argument;
if (action.ActionType == CryptoActionType.Encrypt)
{
string newPath = Path + ".crypter";
using (FileStream encryptedFS = new FileStream(newPath, FileMode.Create))
{
using (RijndaelManaged AES = new RijndaelManaged())
{
AES.KeySize = 256;
AES.BlockSize = 128;
var key = new Rfc2898DeriveBytes(Crypto.GetSecureStringBytes(action.Password), Crypto.saltBytes, 1000);
AES.Key = key.GetBytes(AES.KeySize / 8);
AES.IV = key.GetBytes(AES.BlockSize / 8);
AES.Mode = CipherMode.CBC;
using (var cs = new CryptoStream(encryptedFS, AES.CreateEncryptor(), CryptoStreamMode.Write))
{
using (FileStream fsIn = new FileStream(Path, FileMode.Open))
{
int data;
long finishedBytes = 0;
long reportProgressEvery_bytes = fsIn.Length / 500;
long report_per_cent_Every_bytes = fsIn.Length / 100;
if (report_per_cent_Every_bytes < 1)
{
report_per_cent_Every_bytes = 1;
}
if (reportProgressEvery_bytes < 1)
{
reportProgressEvery_bytes = 1;
}
while ((data = fsIn.ReadByte()) != -1)
{
cs.WriteByte((byte)data);
finishedBytes++;
//worker.ReportProgress(0, (double)((double)finishedBytes / (double)fsIn.Length));
if (finishedBytes % reportProgressEvery_bytes == 0)
{
CryptProgress = (double)((double)finishedBytes / (double)fsIn.Length);
}
if (finishedBytes % report_per_cent_Every_bytes == 0)
{
StateChange();
}
}
fsIn.Close();
}
cs.Close();
}
encryptedFS.Close();
}
}
File.Delete(Path);
Path = newPath;
}
else if (action.ActionType == CryptoActionType.Decrypt)
{
string newPath = System.IO.Path.GetDirectoryName(Path) + "\\" + OGName;
try
{
using (FileStream decryptedFS = new FileStream(newPath, FileMode.Create))
{
using (RijndaelManaged AES = new RijndaelManaged())
{
AES.KeySize = 256;
AES.BlockSize = 128;
var key = new Rfc2898DeriveBytes(Crypto.GetSecureStringBytes(action.Password), Crypto.saltBytes, 1000);
AES.Key = key.GetBytes(AES.KeySize / 8);
AES.IV = key.GetBytes(AES.BlockSize / 8);
AES.Mode = CipherMode.CBC;
using (var cs = new CryptoStream(decryptedFS, AES.CreateDecryptor(), CryptoStreamMode.Write))
{
using (FileStream fsIn = new FileStream(Path, FileMode.Open))
{
int data;
long finishedBytes = 0;
long reportProgressEvery_bytes = fsIn.Length / 500;
long report_per_cent_Every_bytes = fsIn.Length / 100;
if (report_per_cent_Every_bytes < 1)
{
report_per_cent_Every_bytes = 1;
}
if (reportProgressEvery_bytes < 1)
{
reportProgressEvery_bytes = 1;
}
while ((data = fsIn.ReadByte()) != -1)
{
cs.WriteByte((byte)data);
finishedBytes++;
//worker.ReportProgress(0, (double)((double)finishedBytes / (double)fsIn.Length));
if (finishedBytes % reportProgressEvery_bytes == 0)
{
CryptProgress = 0.95 - (double)((double)finishedBytes / (double)fsIn.Length);
}
if (finishedBytes % report_per_cent_Every_bytes == 0)
{
StateChange();
}
}
fsIn.Close();
}
cs.Close();
}
}
decryptedFS.Close();
}
File.Delete(Path);
Path = newPath;
}
catch (CryptographicException cex)
{
if (cex.Message == "Padding is invalid and cannot be removed.")
{
File.Delete(newPath);
MessageBox.Show("Invalid padding exception.\n\n(This most likely means your key is incorrect.)");
}
else
{
MessageBox.Show(cex.ToString());
}
throw cex;
}
}
e.Result = action;
}
