/// <summary>
/// Connect to the remote servers, with the details from Profile
/// </summary>
/// <param name="reconnecting">True if this is an attempt to re-establish a closed connection</param>
public void Connect(bool reconnecting = false)
{
Notifications.ChangeTrayText(reconnecting ? MessageType.Reconnecting : MessageType.Connecting);
Log.Write(l.Debug, "{0} client...", reconnecting ? "Reconnecting" : "Connecting");
if (FTP)
{
_ftpc = new FtpClient {
Host = controller.Account.Host, Port = controller.Account.Port
};
// Add accepted certificates
_ftpc.ClientCertificates.AddRange(Certificates);
if (controller.Account.Protocol == FtpProtocol.FTPS)
{
_ftpc.ValidateCertificate += (sender, x) =>
{
var fingerPrint = new X509Certificate2(x.Certificate).Thumbprint;
if (_ftpc.ClientCertificates.Count <= 0 && x.PolicyErrors != SslPolicyErrors.None)
{
Certificates.Add(x.Certificate);
x.Accept = false;
return;
}
// if ValidateCertificate handler isn't set, accept the certificate and move on
if (ValidateCertificate == null || Settings.TrustedCertificates.Contains(fingerPrint))
{
Log.Write(l.Client, "Trusted: {0}", fingerPrint);
x.Accept = true;
return;
}
var e = new ValidateCertificateEventArgs
{
Fingerprint = fingerPrint,
SerialNumber = x.Certificate.GetSerialNumberString(),
Algorithm = x.Certificate.GetKeyAlgorithmParametersString(),
ValidFrom = x.Certificate.GetEffectiveDateString(),
ValidTo = x.Certificate.GetExpirationDateString(),
Issuer = x.Certificate.Issuer
};
// Prompt user to validate
ValidateCertificate(null, e);
x.Accept = e.IsTrusted;
};
// Change Security Protocol
if (controller.Account.FtpsMethod == FtpsMethod.Explicit)
{
_ftpc.EncryptionMode = FtpEncryptionMode.Explicit;
}
else if (controller.Account.FtpsMethod == FtpsMethod.Implicit)
{
_ftpc.EncryptionMode = FtpEncryptionMode.Implicit;
}
}
_ftpc.Credentials = new NetworkCredential(controller.Account.Username, controller.Account.Password);
try
{
_ftpc.Connect();
}
catch (Exception exc)
{
// Since the ClientCertificates are added when accepted in ValidateCertificate, the first
// attempt to connect will fail with an AuthenticationException. If this is the case, a
// re-connect is attempted, this time with the certificates properly set.
// This is a workaround to avoid storing Certificate files locally...
if (exc is System.Security.Authentication.AuthenticationException &&
_ftpc.ClientCertificates.Count <= 0)
{
Connect();
}
else
{
throw;
}
}
}
else // SFTP
{
ConnectionInfo connectionInfo;
if (controller.isPrivateKeyValid)
{
connectionInfo = new PrivateKeyConnectionInfo(controller.Account.Host, controller.Account.Port, controller.Account.Username, new PrivateKeyFile(controller.Account.PrivateKeyFile, controller.Account.Password));
}
else
{
connectionInfo = new PasswordConnectionInfo(controller.Account.Host, controller.Account.Port, controller.Account.Username, controller.Account.Password);
}
_sftpc = new SftpClient(connectionInfo);
_sftpc.ConnectionInfo.AuthenticationBanner += (o, x) => Log.Write(l.Warning, x.BannerMessage);
_sftpc.HostKeyReceived += (o, x) =>
{
var fingerPrint = x.FingerPrint.GetCertificateData();
// if ValidateCertificate handler isn't set, accept the certificate and move on
if (ValidateCertificate == null || Settings.TrustedCertificates.Contains(fingerPrint))
{
Log.Write(l.Client, "Trusted: {0}", fingerPrint);
x.CanTrust = true;
return;
}
var e = new ValidateCertificateEventArgs
{
Fingerprint = fingerPrint,
Key = x.HostKeyName,
KeySize = x.KeyLength.ToString()
};
// Prompt user to validate
ValidateCertificate(null, e);
x.CanTrust = e.IsTrusted;
};
_sftpc.Connect();
_sftpc.ErrorOccurred += (o, e) =>
{
if (!isConnected)
{
Notifications.ChangeTrayText(MessageType.Nothing);
}
if (ConnectionClosed != null)
{
ConnectionClosed(null, new ConnectionClosedEventArgs {
Text = e.Exception.Message
});
}
if (e.Exception is Renci.SshNet.Common.SftpPermissionDeniedException)
{
Log.Write(l.Warning, "Permission denied error occured");
}
if (e.Exception is Renci.SshNet.Common.SshConnectionException)
{
Reconnect();
}
};
}
controller.HomePath = WorkingDirectory;
if (isConnected)
{
if (!string.IsNullOrWhiteSpace(controller.Paths.Remote) && !controller.Paths.Remote.Equals("/"))
{
WorkingDirectory = controller.Paths.Remote;
}
}
Log.Write(l.Debug, "Client connected sucessfully");
Notifications.ChangeTrayText(MessageType.Ready);
if (Settings.IsDebugMode)
{
LogServerInfo();
}
// Periodically send NOOP (KeepAlive) to server if a non-zero interval is set
SetKeepAlive();
}