public static void DecryptBuffer(byte[] buff, int length, long position)
{
VideoEncryptionV2.XorBuffer(buff, length, position);
if (buff[0] == 0 && buff[1] == 0 && buff[2] == 0)
{
VideoEncryptionV2.useV1 = true;
return;
}
VideoEncryptionV2.XorBuffer(buff, length, position);
if (position == 0L && length > 3)
{
VideoEncryptionV2.XorBufferV2(buff, length, position);
if (buff[0] == 0 && buff[1] == 0)
{
byte b = buff[2];
}
VideoEncryptionV2.useV1 = false;
return;
}
if (VideoEncryptionV2.useV1)
{
VideoEncryptionV2.XorBuffer(buff, length, position);
return;
}
VideoEncryptionV2.XorBufferV2(buff, length, position);
}
public static void OpenPsv()
{
openFolder = new VistaFolderBrowserDialog();
string selectedRootDir;
bool deleteProcessedFiles = false;
/*
* foreach (string file in allFiles)
* {
* Terminal.Term.Display($"Processed: {file}");
* if (deleteProcessedFiles)
* File.Delete(file);
* }
* if (deleteProcessedFiles)
* Directory.Delete(selectedRootDir, true);
*/
if (openFolder.ShowDialog() == DialogResult.OK)
{
//selectedPsvList = openFile.FileNames;
selectedRootDir = openFolder.SelectedPath;
//selectedRootDir = openFile.FileNames[0].Replace(openFile.SafeFileNames[0], "");
IEnumerable <string> allFiles = EnumerateFilesRecursive(selectedRootDir);
//FrmHome.Terminal.Display($"Total files: {selectedPsvList.Length}\n");
foreach (var file in allFiles)
{
//Terminal.Term.Display(file.ToString() + "\n");
currentPsvName = file;
if (!(currentPsvName.EndsWith(".psv") || currentPsvName.EndsWith(".mp4")))
{
Terminal.Term.Display($"{currentPsvName}\n");
Terminal.Term.Display($"Not a PSV or MP4 file\n\n");
continue;
}
Terminal.Term.Display($"Processing: {currentPsvName}\n");
//Terminal.Term.Display(currentPsvName);
if (deleteProcessedFiles)
{
currentMp4Name = String.Concat($"{file}.mp4");
}
else
{
currentMp4Name = currentPsvName;
}
FileStream fs = new FileStream(currentPsvName, FileMode.OpenOrCreate, FileAccess.Read);
BinaryReader reader = new BinaryReader(fs);
psvBuffer = reader.ReadBytes((int)fs.Length);
/*
* Terminal.Term.Display("Initial magic bytes:");
* for (int i=0; i<3; i++)
* {
* Terminal.Term.Display($"psvBuffer[{i}] = {psvBuffer[i]}");
* }
*/
string fileStatus = "Unknown";
if (psvBuffer[0] == 0 && psvBuffer[1] == 0 && psvBuffer[2] == 0)
{
fileStatus = "Already Decrypted";
Terminal.Term.Display($"{fileStatus} Skipping...\n\n");
continue;
}
else if (psvBuffer[0] == 't' && psvBuffer[1] == 'a' && psvBuffer[2] == 's' && psvBuffer[3] != '$')
{
fileStatus = "Corrupted";
Terminal.Term.Display("Damaged psv file found. Repairing...\n");
VideoEncryptionV2.XorBuffer(psvBuffer, psvBuffer.Length, 0);
Terminal.Term.Display("Successfully Repaired!\n");
}
Terminal.Term.Display("Trying to Decrypt the Video\n");
VideoEncryptionV2.XorBufferV2(psvBuffer, psvBuffer.Length, 0);
if (psvBuffer[0] == 0 && psvBuffer[1] == 1 && psvBuffer[2] == 2 && psvBuffer[3].ToString() == "$")
{
Terminal.Term.Display("Successfully Decrypted!");
}
/*
* Terminal.Term.Display("Final magic bytes:");
* for (int i = 0; i < 3; i++)
* {
* Terminal.Term.Display($"psvBuffer[{i}] = {psvBuffer[i]}\n");
* }
*/
reader.Close();
fs.Close();
if (deleteProcessedFiles)
{
File.Delete(currentPsvName);
}
File.WriteAllBytes(currentMp4Name, psvBuffer);
Terminal.Term.Display($"Video Saved as: {currentMp4Name}\n" + '*' * 15 + "\n\n");
}
/*
* for (int i=0; i<selectedPsvList.Length; i++)
* {
* currentPsvName = selectedPsvList[i];
* currentMp4Name = String.Concat($"{currentPsvName}._repaired.mp4");
*
* Terminal.Term.Display($"Processing: {currentPsvName}");
*
* FileStream fs = new FileStream(currentPsvName,FileMode.OpenOrCreate, FileAccess.Read);
* BinaryReader reader = new BinaryReader(fs);
*
* psvBuffer = reader.ReadBytes((int)fs.Length);
*
* VideoEncryptionV2.XorBuffer(psvBuffer, psvBuffer.Length, 0);
* Terminal.Term.Display("Successfully Repaired!\n");
* Terminal.Term.Display("Decrypting the Video");
* VideoEncryptionV2.XorBufferV2(psvBuffer, psvBuffer.Length, 0);
*
* File.WriteAllBytes(currentMp4Name, psvBuffer);
* Terminal.Term.Display($"Video Saved as: {currentMp4Name}");
* Terminal.Term.Display("Do you want to delete the processed videos? (Y/N): ");
*
* reader.Close();
* fs.Close();
*
* if (deleteProcessedFiles)
* File.Delete(currentPsvName);
* }
*/
Terminal.Term.Display("All operations completed successfully!\n");
return;
}
}