private static void SendMsgPart(Socket s, string msgPart)
{
msgPart = RijndaelSimple.Encrypt(msgPart,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
byte[] _msgPart = new byte[msgPart.Length];
_msgPart = Convert.FromBase64String(msgPart);
//_msgPart = Encoding.ASCII.GetBytes(msgPart);
string msgLen = "" + _msgPart.Length;
msgLen = RijndaelSimple.Encrypt(msgLen,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
//MessageBox.Show(msgLen);
byte[] _msgLen = new byte[1024];
_msgLen = Convert.FromBase64String(msgLen);
s.Send(_msgLen, 0, _msgLen.Length, SocketFlags.None);
//MessageBox.Show("rbytes = " + _msgPart.Length + " length = " + msgPart.Length);
// Receive an ack
string sresp = getResponse64(s);
sresp = sresp.Substring(0, 3);
if (!sresp.Equals("000"))
{
MessageBox.Show("something is wrong");
}
// MessageBox.Show("length acked");
s.Send(_msgPart, 0, _msgPart.Length, SocketFlags.None);
// Receive an ack
sresp = getResponse64(s);
sresp = sresp.Substring(0, 3);
if (!sresp.Equals("000"))
{
MessageBox.Show("something is wrong");
}
}
private static string recvMsgPart(Socket sockin)
{
byte[] req = new byte[1024];
// Receive length
while (sockin.Available == 0)
{
System.Threading.Thread.Sleep(100);
}
int rbytes = sockin.Receive(req, 0, sockin.Available, SocketFlags.None);
string sreq = Convert.ToBase64String(req, 0, rbytes);
//MessageBox.Show(sreq);
sreq = RijndaelSimple.Decrypt(sreq,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
int msgLen = Int32.Parse(sreq);
//MessageBox.Show("length = " + msgLen);
// send ack for length
byte[] resp = new byte[2048];
string sresp = "000";
//resp = enc.GetBytes(sresp);
sresp = RijndaelSimple.Encrypt(sresp,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
resp = Convert.FromBase64String(sresp);
sockin.Send(resp, 0, resp.Length, SocketFlags.None);
// MessageBox.Show("Length ack sent");
// receive message
int rcvd = 0;
string encryptedMsgBody = "";
req = null;
req = new byte[msgLen];
while (rcvd < msgLen)
{
while (sockin.Available == 0)
{
System.Threading.Thread.Sleep(100);
}
rbytes = sockin.Receive(req, rcvd, sockin.Available, SocketFlags.None);
rcvd = rcvd + rbytes;
}
encryptedMsgBody = Convert.ToBase64String(req);
//MessageBox.Show("rbytes = " + req.Length + " length = " + encryptedMsgBody.Length);
sreq = RijndaelSimple.Decrypt(encryptedMsgBody,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
//MessageBox.Show(sreq.Substring(0,3) + " " + sreq.Substring(sreq.Length-3,2));
resp = null;
resp = new byte[2048];
sresp = "000";
//resp = enc.GetBytes(sresp);
sresp = RijndaelSimple.Encrypt(sresp,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
resp = Convert.FromBase64String(sresp);
sockin.Send(resp, 0, resp.Length, SocketFlags.None);
//MessageBox.Show("msgPart ack sent");
return(sreq);
}
private void handleClient()
{
IPAddress redirector = IPAddress.Parse("10.108.7.138");
int h_port = 8002;
int count = 0;
int requested = 0;
TcpListener listener = new TcpListener(redirector, h_port);
listener.Start();
Console.WriteLine("listening for requests .........");
while (true)
{
byte[] req = new byte[1024];
byte[] resp = new byte[10240];
bool flag = true;
System.Text.Encoding enc = System.Text.Encoding.ASCII;
Socket sockin = listener.AcceptSocket();
Console.WriteLine("Got request connection...");
/* int available;
* do
* {
* try
* {
* available = sockin.Available;
* }
* catch (ObjectDisposedException exp)
* {
* //flag = false;
* break;
* }
* } while (available == 0);*/
// get the offset
int offset = 0;
//int rbytes = sockin.Receive(req, 0, sockin.Available, SocketFlags.None);
//string sreq = string.Format("{0}", enc.GetString(req));
string sreq = getResponse64(sockin);
offset = Int32.Parse(sreq);
lock (this)
{
count = Int32.Parse(File.ReadAllText("E:\\redirector\\count.txt"));
}
// send number mails to be received by the mobile app
int mailsTosend = 0;
if (count > offset)
{
if (((count - offset) - 10) > 0)
{
mailsTosend = 10;
}
else
{
mailsTosend = count - offset;
}
}
string sresp = "" + mailsTosend;
sresp = RijndaelSimple.Encrypt(sresp,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
resp = Convert.FromBase64String(sresp);
sockin.Send(resp, 0, resp.Length, SocketFlags.None);
//resp = enc.GetBytes(sresp);
//sockin.Send(resp);
//rbytes = sockin.Receive(req);
//sreq = enc.GetString(req);
sreq = getResponse64(sockin);
int resp_code = Int32.Parse(sreq);
if (resp_code == 1)
{
for (int i = 0; i < mailsTosend; i++)
{// send (offset - i) th mail
string mail;
int mail_no = count - offset - i;
string filename = "E:\\redirector\\sent_mails\\" + mail_no + "\\mail.txt";
mail = File.ReadAllText(filename);
mail = mail_no + "\n" + mail;
mail = RijndaelSimple.Encrypt(mail,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
resp = Convert.FromBase64String(mail);
sockin.Send(resp, 0, resp.Length, SocketFlags.None);
// receive an ack
//rbytes = sockin.Receive(req);
//sreq = enc.GetString(req);
sreq = getResponse64(sockin);
resp_code = Int32.Parse(sreq);
if (resp_code != 1)
{
break;
}
}
}
sockin.Close();
}
}
private void sendMails()
{
//IPAddress smtp_server = IPAddress.Parse("144.16.192.6");
senderDone = false;
IPAddress smtp_server = IPAddress.Parse(host);
IPAddress redirector = IPAddress.Parse(host);
int r_port = 8001;
int smtp_port = 25;
int response;
bool isMsgBody = false;
TcpListener listener = new TcpListener(redirector, r_port);
listener.Start();
while (true)
{
Console.WriteLine("Waiting for connections..........");
Socket sockin = listener.AcceptSocket();
Console.WriteLine("got connection from " + sockin.RemoteEndPoint.ToString());
string msg = getResponse64(sockin);
char[] delim = new char[1];
delim[0] = '\n';
string[] lines = msg.Split(delim);
SendMail mail = new SendMail();
mail.from = lines[0];
mail.to = lines[1];
mail.subject = lines[2];
mail.attachmentCount = Int32.Parse(lines[3]);
int i;
if (mail.attachmentCount > 0)
{
mail.attachments = new string[mail.attachmentCount];
for (i = 0; i < mail.attachmentCount; i++)
{
mail.attachments[i] = lines[4 + i];
}
}
mail.body = "";
for (i = 4 + mail.attachmentCount; i < lines.Length; i++)
{
mail.body = mail.body + "\n" + lines[i];
}
string sreq = "000";
sreq = RijndaelSimple.Encrypt(sreq,
passPhrase,
saltValue,
hashAlgorithm,
passwordIterations,
initVector,
keySize);
byte[] req = new byte[1024];
req = Convert.FromBase64String(sreq);
sockin.Send(req, 0, req.Length, SocketFlags.None);
for (i = 0; i < mail.attachmentCount; i++)
{
string fullname = "E:\\redirector\\tmp\\" + mail.attachments[i];
FileInfo f = new FileInfo(fullname);
FileStream fs = f.Open(FileMode.Create, FileAccess.Write);
bool done = false;
do
{
string filepart;
filepart = recvMsgPart(sockin);
if (filepart.Equals("__done__"))
{
fs.Close();
done = true;
}
else
{
byte[] filebytes = new byte[filepart.Length];
filebytes = Convert.FromBase64String(filepart);
fs.Write(filebytes, 0, filebytes.Length);
}
} while (!done);
}
System.Net.Mail.MailMessage mailMsg = new System.Net.Mail.MailMessage();
mailMsg.To.Add(mail.to);
System.Net.Mail.MailAddress mailAddress = new System.Net.Mail.MailAddress(mail.from);
mailMsg.From = mailAddress;
mailMsg.Subject = mail.subject;
mailMsg.Body = mail.body;
for (i = 0; i < mail.attachmentCount; i++)
{
string fullname = "E:\\redirector\\tmp\\" + mail.attachments[i];
System.Net.Mail.Attachment attchmnt = new System.Net.Mail.Attachment(fullname);
mailMsg.Attachments.Add(attchmnt);
}
SmtpClient smtpClient = new SmtpClient("10.108.7.138", 25);
smtpClient.Send(mailMsg);
sockin.Close();
}
}
