// -------------------------- AuthenticateToServer -------------------------
private void AuthenticateToServer(SocketExchange InExchange)
{
string message = null;
// log the base64 encoded string that follows the 334 challenge.
string ResponseData = InExchange.GetResponseData( );
byte[] msgBytes = Convert.FromBase64String(ResponseData);
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
string msg = encoding.GetString(msgBytes);
LogMessage(NetworkRole.Client, msg);
// send the user name, expect back a challenge for the password.
int LoopCx = 0;
while (true)
{
message =
Convert.ToBase64String(
Encoding.ASCII.GetBytes(Username.ToCharArray( ))) +
SmtpConstants.CrLf;
InExchange.ExpectedResponseCodes = new ExpectedResponseCodes(
SmtpConstants.Challenge, SmtpConstants.SyntaxError);
InExchange.SendReceive(message);
if (InExchange.ExpectedResponseCode == SmtpConstants.Challenge)
{
break;
}
else if (InExchange.ExpectedResponseCode == SmtpConstants.SyntaxError)
{
++LoopCx;
if (LoopCx >= 3)
{
InExchange.ThrowUnexpectedResponse(SmtpConstants.Challenge);
}
}
else
{
InExchange.ThrowIfUnexpectedResponse( );
}
}
// send the password. expect back 235 = login successful.
message =
Convert.ToBase64String(
Encoding.ASCII.GetBytes(Password.ToCharArray( ))) +
SmtpConstants.CrLf;
InExchange.ExpectedResponseCodes =
new ExpectedResponseCodes(SmtpConstants.Authenticated);
InExchange.SendReceive(message);
InExchange.ThrowIfUnexpectedResponse( );
// is authenticated.
SignalAuthenticatedEvent(new MailEventArgs(MailEvent.Authenticated));
}
// -------------------- MailServerLogin --------------------------------
private void MailServerLogin( )
{
// send username ...
mSockEx.ExpectedResponseCodes = new ExpectedResponseCodes(PopConstants.Ok);
mSockEx.SendReceive("user " + m_credential.User + PopConstants.CrLf);
if (mSockEx.ExpectedResponseCode == null)
{
mSockEx.ThrowUnexpectedResponse( );
}
// send password
mSockEx.ExpectedResponseCodes = new ExpectedResponseCodes(PopConstants.Ok);
mSockEx.SendReceive("pass " + m_credential.Pass + PopConstants.CrLf);
mSockEx.ThrowIfUnexpectedResponse( );
}
