I'm trying to read datafroma device.
The following codeworks fine on a Desktop application.
When I put it in a Web Application,it gives IO Exception.
I've turned off FireWall,
When deployed
Client inherits from TcpClientPlus
using (FaceId Client = new FaceId(textBoxDeviceIP.Text, Convert.ToInt32(textBoxDevicePort.Text)))
{
Client.SecretKey =textBoxSecretKey.Text.Trim();
string Answer;
FaceId_ErrorCode ErrorCode = Client.Execute(textBoxCommand.Text, out Answer, DeviceCodePage);
if (ErrorCode == FaceId_ErrorCode.Success)
{
textBoxAnswer.Text = Answer;
}
else
{
MessageBox.Show("Error Code: " + ErrorCode.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
I've found out the reason: another connection was open at the same time.
Also, I've turned on the firewall & it worked fine.
Thanks a lot.
Related
I am wokring on a website (.NET Framework 4.6.1) and we implemented OIDC authentication (IdentityServer4). The implementation is very basic, nothing fancy just some code challange and token validation. We tested it and it worked real nice on both Edge and FireFox.
Then we were asked to implement "acr_values" parameter for MFA. In the authentication configuration, specifically inside RedirectToIdentityProvider (which is part of Microsoft.Owin.Security.OpenIdConnect.OpenIdConnectAuthenticationNotifications), we add the specified "acr_values" parameter the following way (the value itself is set in a config file, and its similar to "xyz:asd:wtf:qwe"):
n.ProtocolMessage.AcrValues = authCfg.AcrValues
In a very similar setup (by similar i mean almost identical) it is working without any issues. For my setup it only works in Firefox. When trying in Edge we get AuthenticationFailed (which is also a Microsoft.Owin.Security.OpenIdConnect.OpenIdConnectAuthenticationNotifications) with the following error:
2021-05-26 13:00:08.0633 ERROR MT.Translate.Startup
OIDC-Notification: AuthenticationFailed:
2021-05-26 13:00:08.0633 ERROR MT.Translate.Startup Value cannot
be null. Parameter name: s
2021-05-26 13:00:08.0633 ERROR MT.Translate.Startup
-TargetSite-------------------------------
2021-05-26 13:00:08.0633 ERROR MT.Translate.Startup Byte[]
FromBase64String(System.String)
2021-05-26 13:00:08.0633 ERROR MT.Translate.Startup
-Source-----------------------------------
2021-05-26 13:00:08.0633 ERROR MT.Translate.Startup mscorlib
In development enviroment the behaviour is a bit different. We do not get AuthenticationFailed, because after verifying the login information IdentityServer's redirection does nothing, but return us to the same login screen.
To summerize, without "acr:values" MFA was not working, but otherwise it was working in both Edge and Firefox. After implementig "acr_values" Firefox was working with MFA but not in Edge. So we rolled back to the previous version, where we have no "acr_values" and now MFA works with Edge and Firefox too.
The error does not make any sense to me. There is no parameter called "s", at least I have never heard of it in the context of authentication. The fact that without the necessary code it works does not make any sense to me. Also how can it work on Firefox and not on Edge?
Bonus Objective: Only in Edge a png is not appearing. It was not touched and in every other browser it shows up. How and why is my question.
Thank you for reading my post and I am looking forward to any insight what is happening.
Some code snippets:
oicdAuthOpt.Notifications = new OpenIdConnectAuthenticationNotifications
{
RedirectToIdentityProvider = n =>
{
if (n.ProtocolMessage.RequestType == OpenIdConnectRequestType.Authentication && AppSettingsKey.AuthCodeChallangeEnabled.Enabled)
{
// generate code verifier and code challenge
var codeVerifier = CryptoRandom.CreateUniqueId(32);
string codeChallenge;
using (var sha256 = SHA256.Create())
{
var challengeBytes = sha256.ComputeHash(Encoding.UTF8.GetBytes(codeVerifier));
codeChallenge = Base64UrlEncoder.Encode(challengeBytes);
}
// set code_challenge parameter on authorization request
n.ProtocolMessage.Parameters.Add("code_challenge", codeChallenge);
n.ProtocolMessage.Parameters.Add("code_challenge_method", "S256");
if (AppSettingsKey.MultiFactorAuthEnabled.Enabled)
n.ProtocolMessage.AcrValues = authCfg.AcrValues ?? n.ProtocolMessage.AcrValues;
// remember code verifier in cookie (adapted from OWIN nonce cookie)
// see: https://github.com/scottbrady91/Blog-Example-Classes/blob/master/AspNetFrameworkPkce/ScottBrady91.BlogExampleCode.AspNetPkce/Startup.cs#L85
RememberCodeVerifier(n, codeVerifier);
}
logger.Debug("OIDC-Notification: RedirectToIdentityProvider Called");
//if signing out, add the id_token_hint
if (n.ProtocolMessage.RequestType == OpenIdConnectRequestType.Logout)
{
logger.Debug(" RequestType=" + OpenIdConnectRequestType.Logout);
var idTokenHint = n.OwinContext.Authentication.User.FindFirst("id_token");
if (idTokenHint != null)
{
logger.Debug(" IdTokenHint got from n.OwinContext.Authentication.User");
n.ProtocolMessage.IdTokenHint = idTokenHint.Value;
}
logger.Debug(" IdTokenHint=" + n?.ProtocolMessage?.IdTokenHint);
}
return Task.CompletedTask;
},
Code for the IndentityServer is on their github (Quickstart).
For authorization middleware we made a custom System.Web.Mvc.AuthorizeAttribute.
public override void OnAuthorization(AuthorizationContext filterContext)
{
try
{
if (AppSettingsKey.LoginEnabled.Enabled && AppSettingsKey.OpenIdConnectSSOEnabled.Enabled)
{
var cookie = HttpContext.Current.Request.Cookies["oidc.default"];
if (cookie == null)
{
logger.Debug("oidc.default is null -> HandleUnauthorizedRequest");
base.HandleUnauthorizedRequest(filterContext);
}
else
{
if (CookieKeyStore.Instance.CheckIfContains(cookie.Value))
{
if (!CookieKeyStore.Instance.isExpired(cookie.Value))
{
logger.Debug("oidc.default is not expired:" + cookie.Value + " -> OnAuthorization");
//requires oidc.default and ASP.NET_SessionID cookies
base.OnAuthorization(filterContext);
}
else
{
logger.Debug("oidc.default is expired:" + cookie.Value + " -> HandleUnauthorizedRequest");
base.HandleUnauthorizedRequest(filterContext);
}
}
else
{
logger.Debug("insert oidc.default into the KeyStore:" + cookie.Value + " -> OnAuthorization");
CookieKeyStore.Instance.HandleCookies(cookie);
base.OnAuthorization(filterContext);
}
}
}
else
base.OnAuthorization(filterContext);
}
catch (Exception e)
{
logger.Error(e, "Exception while overriding the OnAuthorization method.");
}
}
"oidc.default" is our custom cookie configured into OIDC.
app.UseCookieAuthentication(new CookieAuthenticationOptions()
{
CookieName = "oidc.default",
CookieManager = new Microsoft.Owin.Host.SystemWeb.SystemWebChunkingCookieManager(),
LoginPath = new PathString("/Account/Login"),
Provider = new CookieAuthenticationProvider
{
OnResponseSignOut = context =>
{
CookieKeyStore.Instance.Clear(context.Request.Cookies["oidc.default"]);
}
}
});
I was looking for possible root cause of the problem reported here (SO thread) - Cannot start a Tomcat v9.0 server in eclipse.
While fiddling for above (unrelated to the thread above mentioned), accidentally, instead of
server.port=8080
I put below in my application.properties file
server.address=8080
When I tried to start server I kept getting this error before I realized the typo.
***************************
APPLICATION FAILED TO START
***************************
Description:
Web server failed to start. Port 8080 was already in use
When I replaced "address" with "port", all worked fine.
Question: Is it expected behavior or a known defect or a possible new defect? If its a new defect, where can I report it on Spring Community?
UPDATE
Per the comments on github issue tracker https://github.com/spring-projects/spring-boot/issues/21101, it is fixed now and the fix will be released in next release 2.2.7
Spring Boot was unable to bind the server to the invalid address 8080.
And the default message is
Web server failed to start. Port 8080 was already in use
You can try to set
server.addresss=9090
and you will get the same message.
The error message is just misleading.
The message is generated in PortInUseFailureAnalyzer
And the PortInUseException is thrown here:
public void start() throws WebServerException {
synchronized (this.monitor) {
if (this.started) {
return;
}
try {
addPreviouslyRemovedConnectors();
Connector connector = this.tomcat.getConnector();
if (connector != null && this.autoStart) {
performDeferredLoadOnStartup();
}
checkThatConnectorsHaveStarted();
this.started = true;
logger.info("Tomcat started on port(s): " + getPortsDescription(true) + " with context path '"
+ getContextPath() + "'");
}
catch (ConnectorStartFailedException ex) {
stopSilently();
throw ex;
}
catch (Exception ex) {
if (findBindException(ex) != null) {
throw new PortInUseException(this.tomcat.getConnector().getPort());
}
throw new WebServerException("Unable to start embedded Tomcat server", ex);
}
finally {
Context context = findContext();
ContextBindings.unbindClassLoader(context, context.getNamingToken(), getClass().getClassLoader());
}
}
}
I'm using Parse plugin 1.5.5 for Unity 5.1.3 in order to communicate with Parse.com in Unity. I'm getting FormatException when trying to connect to Parse when there is no internet connection with following code. I was wondering if this is a bug of Parse plugin or anything I did wrong.
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>("Data");
query.FirstAsync().ContinueWith (task =>
{
if (task.IsCanceled)
{
Debug.Log ("parse canceled");
}
else if(task.IsFaulted)
{
Debug.Log ("parse error");
}
else
{
Debug.Log ("parse retrieved");
}
});
Error code is following.
FormatException: Input string was not in the correct format
System.Int32.Parse (System.String s) (at /Users/builduser/buildslave/mono- runtime-and-classlibs/build/mcs/class/corlib/System/Int32.cs:629)
Parse.PlatformHooks+HttpRequestUnity.getStatusCode (UnityEngine.WWW www)
Parse.PlatformHooks+HttpRequestUnity+<>c__DisplayClass40+<>c__DisplayClass46.<ExecuteAsync>b__3a (UnityEngine.WWW www)
Parse.PlatformHooks+<>c__DisplayClass24.<RegisterNetworkRequest>b__23 ()
Parse.PlatformHooks+<RunDispatcher>d__2e.MoveNext ()
UnityEngine.Debug:LogException(Exception)
Parse.<RunDispatcher>d__2e:MoveNext()
Thank you,
I have the below code to SFTP to a location
public static void putFile(String username, String host, String password, String remotefile, String localfile){
JSch jsch = new JSch();
Session session = null;
try {
session = jsch.getSession(username, host, 22);
session.setConfig("StrictHostKeyChecking", "no");
session.setPassword(password);
session.connect();
Channel channel = session.openChannel("sftp");
channel.connect();
ChannelSftp sftpChannel = (ChannelSftp) channel;
sftpChannel.put(localfile, remotefile);
sftpChannel.exit();
session.disconnect();
} catch (JSchException e) {
e.printStackTrace();
} catch (SftpException e) {
e.printStackTrace();
}
}
I am able to SFTP the document from my local machine using the above code. However when I am trying from a different environment to SFTP to the same location I am getting the follow error.
com.jcraft.jsch.JSchException: invalid server's version string at
com.jcraft.jsch.Session.connect(Session.java:253)
Note : I am using jsch-0.1.31.jar file.
on printing out session.getClientVersion() I am getting "SSH-2.0-JSCH-0.1.31".
I tried to upgrade the jar file to jsch-0.1.51.jar then session.getClientVersion() = "SSH-1.5-JSCH-0.1.51" and I am getting the following error
com.jcraft.jsch.JSchException: Session.connect: java.net.SocketException: Connection reset at com.jcraft.jsch.Session.connect(Session.java:558)
Please can you help me on what parameters should I be looking into and what is causing it to run from my local machine and upload to the same SFTP location and not from other environment?
As noted by #Kenster, the exception is about server's version string, not client's. The "invalid server's version string" exception is thrown by following code in Session.connect:
if(i==buf.buffer.length ||
i<7 || // SSH-1.99 or SSH-2.0
(buf.buffer[4]=='1' && buf.buffer[6]!='9') // SSH-1.5
){
throw new JSchException("invalid server's version string");
}
First, I would try to connect with some client that logs the version string and see yourself. For example with WinSCP, search its log for a pattern like:
. 2014-09-03 17:01:20.596 Server version: SSH-2.0-OpenSSH_5.3
(I'm the author of WinSCP)
Though possibly it's not about version string at all. I would rather believe the error raised by the new version, the Connection reset. The old version may fail to detect that the connection was aborted prematurely and tries to validate some random or incomplete data.
The Connection reset may indicate wide variety of different errors
Server refusing a connection from the other location
Some firewall or proxy not allowing the connection to pass through
I start h2 database in a servlet context listener:
public void contextInitialized(ServletContextEvent sce) {
org.h2.Driver.load();
String apprealPath = sce.getServletContext().getRealPath("\\");
String h2Url = "jdbc:h2:file:" + apprealPath + "DB\\cdb;AUTO_SERVER=true";
LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
StatusPrinter.print(lc);
logger.debug("h2 url : " + h2Url);
try {
conn = DriverManager.getConnection(h2Url, "sa", "sa");
} catch (SQLException e) {
e.printStackTrace();
}
logger.debug("h2 database started in embedded mode");
sce.getServletContext().setAttribute("connection", conn);
}
then I try to use dbvisualizer to connect to h2 using following url :
jdbc:h2:tcp://localhost/~/cdb
but get these error messages:
An error occurred while establishing the connection:
Type: org.h2.jdbc.JdbcSQLException Error Code: 90067 SQL State: 90067
Message:
Connection is broken: "Connection refused: connect" [90067-148]
I tried to replace localhost with "172.17.33.181:58524" (I found it in cdb.lock.db)
reconnect with user "sa" password "sa" ,then server response changed to :
wrong username or password !
In the Automatic Mixed Mode, you don't need to (and you can't) use jdbc:h2:tcp://localhost. Just use the same URL everywhere, that means jdbc:h2:file:...DB\\cdb;AUTO_SERVER=true.
You can use the same database URL independent of whether the database is already open or not. Explicit client/server connections (using jdbc:h2:tcp:// or ssl://) are not supported.