private SecureSocketOptions GetSecureSocketOption(SmtpEncryption encryption)
{
switch (encryption)
{
case SmtpEncryption.StartTLS:
return(SecureSocketOptions.StartTls);
case SmtpEncryption.SSL:
return(SecureSocketOptions.SslOnConnect);
default:
return(SecureSocketOptions.Auto);
}
}
/// <summary>
/// Creates a connection to the SMTP server and authenticates the specified user.</summary>
/// <param name="host">
/// SMTP host name.</param>
/// <param name="port">
/// SMTP host port.</param>
/// <param name="username">
/// SMTP username.</param>
/// <param name="password">
/// SMTP password.</param>
/// <param name="encryption">
/// Encryption mode.</param>
/// <param name="log">
/// The SMTP client logs various messages to this log at various verbosity levels.</param>
/// <param name="timeout">
/// Network stream read/write timeout, in milliseconds.</param>
/// <exception cref="RTSmtpException">
/// SMTP protocol error, or authentication failed.</exception>
/// <exception cref="IOException">
/// Network error or timeout.</exception>
public RTSmtpClient(string host, int port, string username = null, string password = null, SmtpEncryption encryption = SmtpEncryption.None, LoggerBase log = null, int timeout = 10000)
{
_log = log ?? new NullLogger();
_log.Debug(2, "Connecting to {0}:{1}...".Fmt(host, port));
_tcp = new TcpClient(host, port);
_tcpStream = _tcp.GetStream();
if (encryption == SmtpEncryption.Ssl || encryption == SmtpEncryption.SslIgnoreCert)
{
if (encryption == SmtpEncryption.Ssl)
{
_sslStream = new SslStream(_tcpStream);
}
else
{
_sslStream = new SslStream(_tcpStream, false, (_, __, ___, ____) => true);
}
_sslStream.AuthenticateAsClient(host);
_log.Debug(3, "SSL: authenticated as client");
}
(_sslStream ?? _tcpStream).ReadTimeout = timeout;
(_sslStream ?? _tcpStream).WriteTimeout = timeout;
_writer = new StreamWriter(_sslStream ?? _tcpStream, new UTF8Encoding(false))
{
NewLine = "\r\n", AutoFlush = true
};
_reader = new StreamReader(_sslStream ?? _tcpStream, Encoding.UTF8);
_conversation = new List <string>();
sendAndExpect(null, 220);
sendAndExpect("EHLO localhost", 250);
if (username == null || password == null)
{
_log.Debug(3, "Connected without authentication.");
return;
}
var result = sendAndExpect("AUTH LOGIN", 334).Trim();
var resultDec = Convert.FromBase64String(result).FromUtf8();
if (resultDec != "Username:"******"Expected 'Username:'******'{0}'".Fmt(resultDec), _conversation);
}
result = sendAndExpect(Convert.ToBase64String(username.ToUtf8()), 334).Trim();
resultDec = Convert.FromBase64String(result).FromUtf8();
if (resultDec != "Password:"******"Expected 'Password:'******'{0}'".Fmt(resultDec), _conversation);
}
sendAndExpect(Convert.ToBase64String(password.ToUtf8()), 235);
_log.Debug(3, "Connected.");
}
/// <summary>
/// Creates a connection to the SMTP server and authenticates the specified user.</summary>
/// <param name="host">
/// SMTP host name.</param>
/// <param name="port">
/// SMTP host port.</param>
/// <param name="username">
/// SMTP username.</param>
/// <param name="password">
/// SMTP password.</param>
/// <param name="encryption">
/// Encryption mode.</param>
/// <param name="log">
/// The SMTP client logs various messages to this log at various verbosity levels.</param>
/// <param name="timeout">
/// Network stream read/write timeout, in milliseconds.</param>
/// <exception cref="RTSmtpException">
/// SMTP protocol error, or authentication failed.</exception>
/// <exception cref="IOException">
/// Network error or timeout.</exception>
public RTSmtpClient(string host, int port, string username, string password, SmtpEncryption encryption = SmtpEncryption.None, LoggerBase log = null, int timeout = 10000)
{
_log = log ?? new NullLogger();
_log.Debug(2, "Connecting to {0}:{1}...".Fmt(host, port));
_tcp = new TcpClient(host, port);
_tcpStream = _tcp.GetStream();
if (encryption == SmtpEncryption.Ssl || encryption == SmtpEncryption.SslIgnoreCert)
{
if (encryption == SmtpEncryption.Ssl)
_sslStream = new SslStream(_tcpStream);
else
_sslStream = new SslStream(_tcpStream, false, (_, __, ___, ____) => true);
_sslStream.AuthenticateAsClient(host);
_log.Debug(3, "SSL: authenticated as client");
}
(_sslStream ?? _tcpStream).ReadTimeout = timeout;
(_sslStream ?? _tcpStream).WriteTimeout = timeout;
_writer = new StreamWriter(_sslStream ?? _tcpStream, new UTF8Encoding(false)) { NewLine = "\r\n", AutoFlush = true };
_reader = new StreamReader(_sslStream ?? _tcpStream, Encoding.UTF8);
_conversation = new List<string>();
sendAndExpect(null, 220);
sendAndExpect("EHLO localhost", 250);
var result = sendAndExpect("AUTH LOGIN", 334).Trim();
var resultDec = Convert.FromBase64String(result).FromUtf8();
if (resultDec != "Username:"******"Expected 'Username:'******'{0}'".Fmt(resultDec), _conversation);
result = sendAndExpect(Convert.ToBase64String(username.ToUtf8()), 334).Trim();
resultDec = Convert.FromBase64String(result).FromUtf8();
if (resultDec != "Password:"******"Expected 'Password:'******'{0}'".Fmt(resultDec), _conversation);
sendAndExpect(Convert.ToBase64String(password.ToUtf8()), 235);
_log.Debug(3, "Connected.");
}