public override async Task Connect(bool reconnecting = false)
{
Notifications.ChangeTrayText(reconnecting ? MessageType.Reconnecting : MessageType.Connecting);
Log.Write(l.Debug, "{0} client...", reconnecting ? "Reconnecting" : "Connecting");
_ftpc = new System.Net.FtpClient.FtpClient
{
Host = Controller.Account.Host,
Port = Controller.Account.Port
};
// Add accepted certificates
_ftpc.ClientCertificates.AddRange(_certificates);
if (Controller.Account.Protocol == FtpProtocol.FTPS)
{
_ftpc.SslProtocols = SslProtocols.Tls11 | SslProtocols.Tls12;
_ftpc.ValidateCertificate += (sender, x) =>
{
var certificate = new X509Certificate2(x.Certificate);
Log.Write(l.Warning, $"Policy errors: {x.PolicyErrors}");
// if ValidateCertificate handler isn't set, accept the certificate and move on
if (ValidateCertificate == null || Settings.TrustedCertificates.Contains(certificate.Thumbprint))
{
Log.Write(l.Client, "Trusted: {0}", certificate.Thumbprint);
x.Accept = true;
return;
}
var e = new ValidateCertificateEventArgs
{
cert = certificate,
Fingerprint = certificate.Thumbprint
};
// Prompt user to validate
ValidateCertificate?.Invoke(null, e);
if (e.IsTrusted)
{
_certificates.Add(x.Certificate);
}
x.Accept = e.IsTrusted;
};
}
// Change Security Protocol
_ftpc.EncryptionMode = (FtpEncryptionMode)Controller.Account.FtpsMethod;
_ftpc.Credentials = new NetworkCredential(Controller.Account.Username, Controller.Account.Password);
try
{
await _ftpc.ConnectAsync();
}
catch (AuthenticationException ex) when(ex.Message.StartsWith("The remote certificate is invalid"))
{
throw new CertificateDeclinedException(ex.Message, ex);
}
catch (FtpCommandException ex)
{
ex.LogException();
throw new AuthenticationException(ex.Message, ex.InnerException);
}
catch (Exception ex)
{
ex.LogException();
throw;
}
_ftpc.Encoding = this.Charset;
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();
}
public override async Task Connect(bool reconnecting = false)
{
Notifications.ChangeTrayText(reconnecting ? MessageType.Reconnecting : MessageType.Connecting);
Log.Write(l.Debug, "{0} client...", reconnecting ? "Reconnecting" : "Connecting");
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);
}
connectionInfo.Encoding = this.Charset;
connectionInfo.AuthenticationBanner += (o, x) =>
Log.Write(l.Warning, x.BannerMessage);
_sftpc = new Renci.SshNet.SftpClient(connectionInfo);
_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?.Invoke(null, e);
x.CanTrust = e.IsTrusted;
};
var caughtException = default(Exception);
await Task.Run(() =>
{
try
{
_sftpc.Connect();
}
catch (SshAuthenticationException ex)
{
ex.LogException();
caughtException = new AuthenticationException(ex.Message, ex.InnerException);
}
catch (SshConnectionException ex)
{
ex.LogException();
caughtException = new CertificateDeclinedException(ex.Message, ex.InnerException);
}
catch (Exception ex)
{
ex.LogException();
caughtException = ex;
}
});
if (caughtException != default(Exception))
{
throw caughtException;
}
_sftpc.ErrorOccurred += async(o, e) =>
{
if (!IsConnected)
{
Notifications.ChangeTrayText(MessageType.Nothing);
}
OnConnectionClosed(new ConnectionClosedEventArgs {
Text = e.Exception.Message
});
if (e.Exception is SftpPermissionDeniedException)
{
Log.Write(l.Warning, "Permission denied error occured");
}
if (e.Exception is SshConnectionException)
{
await 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();
}
}
