private static MemoryStream DecryptBhdFile(string filePath, GameVersion version)
{
string fileDirectory = Path.GetDirectoryName(filePath) ?? string.Empty;
string fileName = Path.GetFileName(filePath) ?? string.Empty;
string key = null;
switch (version)
{
case GameVersion.DarkSouls2:
string keyFileName = Regex.Replace(fileName, @"Ebl\.bhd$", "KeyCode.pem", RegexOptions.IgnoreCase);
string keyFilePath = Path.Combine(fileDirectory, keyFileName);
if (File.Exists(keyFilePath))
{
key = File.ReadAllText(keyFilePath);
}
break;
case GameVersion.DarkSouls3:
DecryptionKeys.TryGetRsaFileKey(fileName, out key);
break;
}
if (key == null)
{
throw new ApplicationException($"Missing decryption key for file \'{fileName}\'");
}
return(CryptographyUtility.DecryptRsa(filePath, key));
}
private static MemoryStream DecryptBhdFile(string filePath)
{
string fileName = Path.GetFileName(filePath);
string key;
if (!DecryptionKeys.TryGetRsaFileKey(fileName, out key))
{
throw new ApplicationException($"Missing decryption key for file \'{fileName}\'");
}
return(CryptographyUtility.DecryptRsa(filePath, key));
}
private static MemoryStream DecryptBhdFile(string filePath, GameVersion version)
{
string fileDirectory = Path.GetDirectoryName(filePath) ?? string.Empty;
string fileName = Path.GetFileName(filePath) ?? string.Empty;
string key = null;
// hack: bhd5 may already be decrypted!
FileStream fs = File.Open(filePath, FileMode.Open);
MemoryStream ms = new MemoryStream();
fs.CopyTo(ms);
fs.Close();
ms.Seek(0, SeekOrigin.Begin);
string bhd5_sig;
if (TryGetAsciiSignature(ms, 4, out bhd5_sig))
{
if (bhd5_sig == "BHD5")
{
return(ms);
}
}
switch (version)
{
case GameVersion.DarkSouls2:
string keyFileName = Regex.Replace(fileName, @"Ebl\.bhd$", "KeyCode.pem", RegexOptions.IgnoreCase);
string keyFilePath = Path.Combine(fileDirectory, keyFileName);
if (File.Exists(keyFilePath))
{
key = File.ReadAllText(keyFilePath);
}
break;
case GameVersion.DarkSouls3:
DecryptionKeys.TryGetRsaFileKey(fileName, out key);
break;
}
if (key == null)
{
throw new ApplicationException($"Missing decryption key for file \'{fileName}\'");
}
return(CryptographyUtility.DecryptRsa(filePath, key));
}