public string Encrypt(string text, byte[] key)
{
byte[] message = Encoding.UTF8.GetBytes(text);
int toPad = message.Length % BlockSize;
byte[] bytes;
if (toPad == 0)
{
bytes = message;
}
else
{
toPad = BlockSize - message.Length % BlockSize;
bytes = new byte[message.Length + toPad];
for (int i = 0; i < bytes.Length; i++)
{
if (i < message.Length)
{
bytes[i] = message[i];
}
}
}
object sessionKeys = MakeKey(key);
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < bytes.Length / BlockSize; i++)
{
byte[] enc = BlockEncrypt(bytes, BlockSize * i, sessionKeys);
stringBuilder.Append(ByteToHex(enc));
}
return(Converts.StringToBinary(stringBuilder.ToString()));
}
public void SendMsg(string msg, int id)
{
foreach (var item in users)
{
string answer = DateTime.Now.ToShortTimeString();
string keyForDecrypt;
var user = users.FirstOrDefault(i => i.ID == id);
if (user != null)
{
answer += ": " + user.Name + " ";
keyForDecrypt = msg.Substring(msg.Length - 44);
msg = msg.Remove(msg.Length - 44);
msg = serpent.Encrypt(serpent.Decrypt(msg, keyForDecrypt), Convert.FromBase64String(item.Key));
msg = Converts.BinaryToString(msg);
msg += item.Key;
}
answer += msg;
item.operationContext.GetCallbackChannel <IServerChatCallback>().MsgCallback(answer);
}
}