public RadiusPacket SendAndReceivePacket(RadiusPacket packet, int retries)
{
IPEndPoint RemoteIpEndPoint = null;
for (int x = 0; x < retries; x++)
{
var dt = DateTime.UtcNow;
using (RadiusUdpClient udpClient = new RadiusUdpClient())
{
udpClient.Connect(this.hostName, this.authPort);
udpClient.SetTimeout(this.socketTimeout);
Byte[] packetBinary = packet.GetBytes();
udpClient.Send(packetBinary, packetBinary.Length);
Byte[] receiveBytes = udpClient.Receive(ref RemoteIpEndPoint);
if (receiveBytes != null)
{
RadiusPacket receivedPacket = new RadiusPacket(receiveBytes, this.sharedSecret, packet.Authenticator);
if (VerifyPacket(packet, receivedPacket))
{
return(receivedPacket);
}
}
}
}
return(null);
}
static void Main(string[] args)
{
if (args.Length != 4)
{
ShowUsage();
return;
}
try {
RadiusClient rc = new RadiusClient(args[0], args[1]);
RadiusPacket authPacket = rc.Authenticate(args[2], args[3]);
RadiusPacket receivedPacket = rc.SendAndReceivePacket(authPacket);
if (receivedPacket == null)
{
throw new Exception("Can't contact remote radius server !");
}
switch (receivedPacket.Type)
{
case RadiusPacketType.ACCESS_ACCEPT:
Console.WriteLine("accepted");
foreach (RadiusAttribute attr in receivedPacket.Attributes)
{
Console.WriteLine(attr.Type.ToString() + " = " + attr.Value);
}
break;
default:
Console.WriteLine("rejected");
break;
}
} catch (Exception e) {
Console.WriteLine("Error : " + e.Message);
}
}
public RadiusPacket Authenticate(string username, string password)
{
RadiusPacket packet = new RadiusPacket(RadiusPacketType.ACCESS_REQUEST,this.sharedSecret);
byte[] encryptedPass = Utils.encodePapPassword(Encoding.ASCII.GetBytes(password),packet.Authenticator,this.sharedSecret);
packet.SetAttributes(RadiusAttributeType.USER_NAME , Encoding.ASCII.GetBytes(username));
packet.SetAttributes(RadiusAttributeType.USER_PASSWORD , encryptedPass);
return packet;
}
public RadiusPacket Authenticate(string username, string password)
{
RadiusPacket packet = new RadiusPacket(RadiusPacketType.ACCESS_REQUEST, this.sharedSecret);
byte[] encryptedPass = Utils.encodePapPassword(Encoding.ASCII.GetBytes(password), packet.Authenticator, this.sharedSecret);
packet.SetAttributes(RadiusAttributeType.USER_NAME, Encoding.ASCII.GetBytes(username));
packet.SetAttributes(RadiusAttributeType.USER_PASSWORD, encryptedPass);
return(packet);
}
private bool VerifyPacket(RadiusPacket requestedPacket, RadiusPacket receivedPacket)
{
if (requestedPacket.Identifier != receivedPacket.Identifier)
{
return(false);
}
if (requestedPacket.Authenticator.ToString() != Utils.makeRFC2865ResponseAuthenticator(receivedPacket.RawData, requestedPacket.Authenticator, sharedSecret).ToString())
{
return(false);
}
return(true);
}
public RadiusPacket SendAndReceivePacket(RadiusPacket packet)
{
return(SendAndReceivePacket(packet, AUTH_RETRIES));
}
public RadiusPacket SendAndReceivePacket(RadiusPacket packet,int retries)
{
IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);
RadiusUdpClient udpClient = new RadiusUdpClient();
udpClient.SetTimeout(this.socketTimeout);
for(int x=0; x< retries;x++) {
try{
try {
udpClient.Connect(this.hostName,this.authPort);
} catch (Exception e) {
udpClient = new RadiusUdpClient();
udpClient.Connect(this.hostName, this.authPort);
}
udpClient.Send(packet.GetBytes(),packet.GetBytes().Length);
Byte[] receiveBytes = udpClient.Receive(ref RemoteIpEndPoint);
RadiusPacket receivedPacket = new RadiusPacket(receiveBytes,this.sharedSecret,packet.Authenticator);
if(VerifyPacket(packet,receivedPacket))
return receivedPacket;
udpClient.Close();
}catch (Exception e){
if(udpClient!=null)udpClient.Close();
Console.WriteLine(e.Message);
}
}
return null;
}
public RadiusPacket SendAndReceivePacket(RadiusPacket packet)
{
return SendAndReceivePacket(packet,AUTH_RETRIES);
}
private bool VerifyPacket(RadiusPacket requestedPacket,RadiusPacket receivedPacket)
{
if(requestedPacket.Identifier != receivedPacket.Identifier ) return false;
if(requestedPacket.Authenticator.ToString() != Utils.makeRFC2865ResponseAuthenticator(receivedPacket.RawData,requestedPacket.Authenticator,sharedSecret).ToString()) return false;
return true;
}
