I have 2 apps running inside IIS - Client and Service. Service running just fine, but client isn't.
They talk to each other thru WCF with message security relaying on certificates (it isn't transport security, it's just message security). Both are using self-signed certificates.
But client ends up with error:
System.IdentityModel.Tokens.SecurityTokenValidationException: The X.509 certificate ... is not in the trusted people store. The X.509 certificate ... chain building failed. The certificate that was used has a trust chain that cannot be verified. Replace the certificate or change the certificateValidationMode. A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider
I know how to disable certificate validation on service side and I did it, but how can I disable CA validation on client side?
If you are making Request to the server from the client application, call the below lines to avoid certification check before making a service request.
Using this code will bypass SSL validation error due to a self-signed certificate.
System.Net.ServicePointManager.ServerCertificateValidationCallback =
delegate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{ return true; };
Note: Use this for testing purpose only, for actual application use a valid SSL certificate.
The solution presented by sudhAnsu63 should work for you.
Alternatively, since you are using Message security you could add this to the client configuration file:
<serviceCertificate>
<authentication certificateValidationMode="None" />
</serviceCertificate>
In code use this:
using System.ServiceModel; // (to ChannelFactory)
using System.IdentityModel;
ConfigChannel = new ChannelFactory<xxxxxx>(binding, endPoint);
ConfigChannel.Credentials.UserName.UserName = _userName;
ConfigChannel.Credentials.UserName.Password = _password;
ConfigChannel.Credentials.ServiceCertificate.Authentication.CertificateValidationMode = System.ServiceModel.Security.X509CertificateValidationMode.None;
If you pace the self-signed certificate in "trusted root Certification Authorities", you can avoid certificate error.
Related
I am trying to run the gRPC default project that is created in visual studio. I choose the gRPC ASP template.
I am trying to use self-signed certificates to connect to the service.
When I use grpui to connect, I have to specify the CA certificate, the client certificate and the client key to connect. I need to specify the CA certificate to verify the server certificate because it is a self-signed certificate.
Then I want to connect from a WPF application where I need to create a X509Certificate2 object.
The way I know how to create is this:
var cert = X509Certificate2.CreateFromPem(paramCertificado, paramKey);
but when I try to connect, I get an error that tells that the client closed the connection. I can see this message in the log of the service, when the client try to call to a method in the service.
How I can connect from grpcui when I specify the CA certificate? I tried to connect with grpcui without specifying the CA certificate. Then I get this error: "certificate signed by unknown authority".
So I am sure that I have to create the X509Certificate2 by specifying the CA certificate, but I don't know how to create this kind of certificates using the CA certificate and the client certificates.
Thanks.
There's a problem. I have a site, that expanded locally on IIS, that needs to be connected to the remote WCF service. I've added all required certificates to the TrustedRoot store of LocalComputer. I've granted all permissions to my domain account for using certificates. But there's still a problem:
"The remote certificate is invalid according to the validation
procedure"
when I'm trying to run method of WCF-service (but it's connected to this WCF service fine).
I have some thinks about that:
1) Maybe I need to select SSL on IIS setting of this site?
2) Maybe I need to put certificates not only to LocalMachine, but to the CurrentUser too?
Advice me some tips for how to establish SSL connection and pass this exception. Thank you :)
This is because, the certificate you use on your local IIS, is a virtual one. Probably, you will not get it in real time. There are several hacks available to make it work locally.
NOTE: Never ever do this on production...
Add following code segment(an event handler), before calling any method of service.
ServicePointManager.ServerCertificateValidationCallback +=
EasyCertCheck;
bool EasyCertCheck(object sender, X509Certificate cert,
X509Chain chain, System.Net.Security.SslPolicyErrors error)
{
return true;
}
We are setting up a new SharePoint for which we don't have a valid SSL certificate yet. I would like to call the Lists web service on it to retrieve some meta data about the setup. However, when I try to do this, I get the exception:
The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.
The nested exception contains the error message:
The remote certificate is invalid according to the validation procedure.
This is correct since we are using a temporary certificate.
My question is: how can I tell the .Net web service client (SoapHttpClientProtocol) to ignore these errors?
Alternatively you can register a call back delegate which ignores the certification error:
...
ServicePointManager.ServerCertificateValidationCallback = MyCertHandler;
...
static bool MyCertHandler(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors error)
{
// Ignore errors
return true;
}
Like Jason S's answer:
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
I put this in my Main and look to my app.config and test if (ConfigurationManager.AppSettings["IgnoreSSLCertificates"] == "True") before calling that line of code.
I solved it this way:
Call the following just before calling your ssl webservice that cause that error:
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
/// <summary>
/// solution for exception
/// System.Net.WebException:
/// The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
/// </summary>
public static void BypassCertificateError()
{
ServicePointManager.ServerCertificateValidationCallback +=
delegate(
Object sender1,
X509Certificate certificate,
X509Chain chain,
SslPolicyErrors sslPolicyErrors)
{
return true;
};
}
The approach I used when faced with this problem was to add the signer of the temporary certificate to the trusted authorities list on the computer in question.
I normally do testing with certificates created with CACERT, and adding them to my trusted authorities list worked swimmingly.
Doing it this way means you don't have to add any custom code to your application and it properly simulates what will happen when your application is deployed. As such, I think this is a superior solution to turning off the check programmatically.
I was having same error using DownloadString; and was able to make it works as below with suggestions on this page
System.Net.WebClient client = new System.Net.WebClient();
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
string sHttpResonse = client.DownloadString(sUrl);
ServicePointManager.ServerCertificateValidationCallback +=
(mender, certificate, chain, sslPolicyErrors) => true;
will bypass invaild ssl . Write it to your web service constructor.
For newbies,
you can extend your partial service class in a separate cs file and add the code the code provided by "imanabidi" to get it integrated
To further expand on Simon Johnsons post - Ideally you want a solution that will simulate the conditions you will see in production and modifying your code won't do that and could be dangerous if you forget to take the code out before you deploy it.
You will need a self-signed certificate of some sort. If you're using IIS Express you will have one of these already, you'll just have to find it. Open Firefox or whatever browser you like and go to your dev website. You should be able to view the certificate information from the URL bar and depending on your browser you should be able to export the certificate to a file.
Next, open MMC.exe, and add the Certificate snap-in. Import your certificate file into the Trusted Root Certificate Authorities store and that's all you should need. It's important to make sure it goes into that store and not some other store like 'Personal'. If you're unfamiliar with MMC or certificates, there are numerous websites with information how to do this.
Now, your computer as a whole will implicitly trust any certificates that it has generated itself and you won't need to add code to handle this specially. When you move to production it will continue to work provided you have a proper valid certificate installed there. Don't do this on a production server - that would be bad and it won't work for any other clients other than those on the server itself.
I am using BasicHttpBinding to connect a web service hosted on a secured (https) port. To get it working, I have changed the Security.Mode to TransportWithMessageCredential and Security.Message to BasicHttpMessageCredentialType.Cerificate. I am also calling
client.ClientCredentials.ClientCertificate.SetCertificate()
with localhost as the subject name.
The issue here is that for unit testing, I have an unsigned certificate from the web server and am supposed to ignore any certificate error thrown during the proxy creation; but I am unable to do so, because I keep getting an error telling me to "specify a certificate". Right now, I am clueless; I appreciate any help here.
You can use the following code to skip certificate validation. This creates a RemoteCertificateValidationCallback that always return true for any certificate.
System.Net.ServicePointManager.ServerCertificateValidationCallback =
(sender, certificate, chain, errors) => true;
For server ssl, the SecurityMode should be set to Transport.
I'm attempting to use the System.Net.Mail.SmtpClient class to relay an email through my company's email server. All SMTP connections to the mail server have to be SSL and it uses a self signed certificate. That's fine for Outlook where you can just click ok on the warning dialogue but does anyone know a way to get SmtpClient to accept a self signed certificate?
I'm planning on using this app on the Windows Azure Platform so I won't be able to install the self signed certificate as a trusted root.
You may take a look at the ServerCertificateValidationCallback property:
ServicePointManager.ServerCertificateValidationCallback =
(sender, certificate, chain, sslPolicyErrors) => true;
It represents a callback which is called by the runtime when it tries to validate an SSL certificate. By returning true you basically say that you don't care if the certificate is valid or not -> you always accept it. Of course having self signed certificates in production environment is not a good idea.
My issue ended up being that the .Net SmtpClient class apparently doesn't support the use of port 465 for SMTP SSL connections. Using port 25 with a self signed SSL certificate worked correctly.
MSDN System.Net forum question Can SmtpClient be configured to work with a self signed certificate?.
If you want to be more secure, you might want to look at doing the following:
theClient.EnableSsl = true;
ServicePointManager.ServerCertificateValidationCallback =
(sender, certificate, chain, sslPolicyErrors) => {
if (sender == theClient) {
return true;
} else {
// you should apply the code from this SO answer
// https://stackoverflow.com/a/25895486/795690
// if you find that anything in your app uses this path
throw new ApplicationException("Certificate validation is currently disabled, extra code neeeded here!");
}
};
In this code we are auto-approving certificates only for the specific SMTP client in question; we have a stub code path which you should upgrade to explicitly reinstate default certificate validation if you find that anything else in your app is using it.
Another different, useful approach to approving certificates only in contexts where you actually want to is in this SO answer.