/// <summary>
/// Wrapper for StreamReader that allows to read Encrypted Files
/// </summary>
/// <param name="File">File to Read</param>
/// <param name="EM">Encryption Method Used</param>
/// <param name="Key">Key to Encrypt</param>
public PatcherStreamReader(FileStream File, EncrytionMode EM, String Key = "GEM2015!")
{
switch (EM)
{
case EncrytionMode.None:
sr = new StreamReader(File);
break;
case EncrytionMode.Standard:
case EncrytionMode.Rijndael:
sr = new StreamReader(File);
byte[] key = new UnicodeEncoding().GetBytes(Key);
byte[] crypto = Convert.FromBase64String(sr.ReadToEnd());
byte[] plain = new byte[crypto.Length];
RijndaelManaged rm = new RijndaelManaged() { Padding = PaddingMode.Zeros };
MemoryStream ms = new MemoryStream(crypto);
CryptoStream cs = new CryptoStream(ms, rm.CreateDecryptor(key, key), CryptoStreamMode.Read);
int count = cs.Read(plain, 0, crypto.Length);
cs.Close();
ms.Close();
sr.Close();
MS = new MemoryStream(Encoding.UTF8.GetBytes((Encoding.UTF8.GetString(plain, 0, count).TrimEnd("\0".ToCharArray()))));
sr = new StreamReader(MS);
break;
default:
break;
}
}
/// <summary>
/// Wrapper for StreamWriter, allows to write Encrypted files
/// </summary>
/// <param name="File">File to write to</param>
/// <param name="EM">Encryption Method</param>
/// <param name="key">Password to Encrypt with</param>
public PatcherStreamWriter(FileStream File, EncrytionMode EM, String key = "GEM2015!")
{
switch (EM)
{
case EncrytionMode.None:
sw = new StreamWriter(File);
break;
case EncrytionMode.Standard:
case EncrytionMode.Rijndael:
encrypt = true;
sw = new StreamWriter(File);
this.Key = new UnicodeEncoding().GetBytes(key);
break;
default:
break;
}
}
/// <summary>
/// Patcher to Generate a PatchList to use with this Patcher
/// </summary>
/// <param name="File">Handle of the File that should be Used as PatchList</param>
public Patcher(string file, string folder, bool encrypt)
{
this.PatchList = File.Open(file, FileMode.Create, FileAccess.Write, FileShare.None);
filePath = folder;
if(encrypt)
{
Encryption = EncrytionMode.Rijndael;
}
}
