I have a SOAP web service inside that I am calling a third party secured web service (it was HTTP earlier now they secured it). they have valid SSL certificate. while calling the third party service I am getting below error,
Server was unable to process request. ---> The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel
at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
There are few articles which says TSL 1.2 should be enabled, to check about TSL further, I have below component on my server,
Here is third party service call,
Can someone guide me, where should I setup trust relationship ?
Do I need to modify my code or just some configurations changes needed
In addition to Abraham post above, make sure that that IIS has enough access to the certificates. We faced the issue and at first, it seemed like the app could access the certificates but that wasn't the case. We fixed it by going to the Manage Certificates -> Personal -> Certificates -> Right Click the certificate -> All tasks -> Manage Private Keys -> Add -> Grant Access to "Everyone" (testing only, you should only grant access to IIS). The connection worked after doing this.
There is a process of exchanging the public key of the service certificate during the secure communication. Therefore, we should establish the trust relationship between the client-side and the server-side. As for mutual certification authentication, we should establish the trust relationship each other.
Trust relationship represents the certificate is valid, the server is real and secure. Namely, it represents this is a validation of the server’s identity. This also could be accomplished by the below code segments.
//adding below code segments to ignore the service certificate validation.
ServicePointManager.ServerCertificateValidationCallback += delegate
{
return true;
};
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Ssl3;
More commonly, this should be finished by installing the service Root certificate in the local Trusted Certification Authorities.
To get the certificate you can either,
1, Ask the service vendor for it, you can ask for the Root CA
certificate, you can authorize all the servers you need at once;
Use a web browser to get the certificate. Access the service creation page with HTTPS(https://localhost:xxxx/xxx.svc). Then use the web browser options to export the certificate to a .cer file.
Install the certificate.
Double-click the .cer file to install the certificate. Choose Local Computer, then choose Trusted Root Certification Authorities.
Here is a detailed step.
https://success.outsystems.com/Support/Enterprise_Customers/Installation/Install_a_trusted_root_CA__or_self-signed_certificate
Feel free to let me know if there is anything I can help with.
Related
Currently I want to expose a gRPC Method as Public API and protected by Auth0 (JWT Token), with Istio(Envoy Proxy) will help validating the token on server side. Since the JWT Token is not encrypted by the standard (it is only used to end-user authentication and authorization layer), I want to encrypt the communication using TLS. Also, my public server already have valid certificate.
The problem is on the gRPC Client side. Every example I look, the gRPC Client have to initialize the TLS Connection with server cert pem file. Is it really necessary? Because it adds operational burden and complexity, where we have to distribute our server pem file everytime we renew the certificate AND/OR the client side has to restart the application.
Thanks,
Agung
If you are using a self signed certificate, then yes you must explicitly trust it in your client. If you use a publicly signed certificate on your Server, gRPC will use the Operating System's certificate authorities to verify the cert. (In the case of Java, it uses the JVMs cert authorities.)
If you are using a self-signed certificate you need to specify the server's root certificates in the pem_root_certs member of the SslCredentialsOptions struct passed in when creating a channel, as Carl says.
However if you are using a CA issued certificate, leaving the pem_root_certs member empty will cause gRPC to default to its own master list (reviewable online), not any OS-specific list.
Linked to my question about client certificate authentication done the right way I was wondering whether I have to take the step to link a certificate to a user (active directory or local user) in order to have clientcertificate authentication to work as expected?
And is it necessary to disable all other authentication schemes (anonymous, windows) for clientcerticate authentication to happen?
See this question on the IIS forum:
This is what I would like to achieve:
A SSL-certificate for the URL itself (https://example.company.com). To my understanding this certificate does not have any connection whatsoever to client certificates.
Client certificates issued from my local CA and shared to trusted clients.
Some way of specifying which client certificates are allowed to connect to a specific IIS web site.
3 seems... complicated, to say the least. If I just set everything up and connect with a client certificate I have issued it works. The CA and the web server are on the same domain (if that matters), and I have added the root certificate from the CA to the trusted CAs on the web server. However, at this stage I have not told the web server which client certificates to accept, so my first guess was that it accepts all client certificates [chained to] any CA it trusts.
See also this question, which links to this site, which is dead.
It comes down to creating a "Certificate Trust List", or to mapping certificates to user accounts.
You can however implement a custom certificate validator in your service, how to do so is explained here.
I am somewhat confused as to how two-way SSL works. How does the client create its certificate to send to the server? Is it generated from the server and distributed to the client?
Also, what is the advantage of two-way SSL over one-way SSL?
Both certificates should exist prior to the connection. They're usually created by Certification Authorities (not necessarily the same). (There are alternative cases where verification can be done differently, but some verification will need to be made.)
The server certificate should be created by a CA that the client trusts (and following the naming conventions defined in RFC 6125).
The client certificate should be created by a CA that the server trusts.
It's up to each party to choose what it trusts.
There are online CA tools that will allow you to apply for a certificate within your browser and get it installed there once the CA has issued it. They need not be on the server that requests client-certificate authentication.
The certificate distribution and trust management is the role of the Public Key Infrastructure (PKI), implemented via the CAs. The SSL/TLS client and servers and then merely users of that PKI.
When the client connects to a server that requests client-certificate authentication, the server sends a list of CAs it's willing to accept as part of the client-certificate request. The client is then able to send its client certificate, if it wishes to and a suitable one is available.
The main advantages of client-certificate authentication are:
The private information (the private key) is never sent to the server. The client doesn't let its secret out at all during the authentication.
A server that doesn't know a user with that certificate can still authenticate that user, provided it trusts the CA that issued the certificate (and that the certificate is valid). This is very similar to the way passports are used: you may have never met a person showing you a passport, but because you trust the issuing authority, you're able to link the identity to the person.
You may be interested in Advantages of client certificates for client authentication? (on Security.SE).
What you call "Two-Way SSL" is usually called TLS/SSL with client certificate authentication.
In a "normal" TLS connection to example.com only the client verifies that it is indeed communicating with the server for example.com. The server doesn't know who the client is. If the server wants to authenticate the client the usual thing is to use passwords, so a client needs to send a user name and password to the server, but this happens inside the TLS connection as part of an inner protocol (e.g. HTTP) it's not part of the TLS protocol itself. The disadvantage is that you need a separate password for every site because you send the password to the server. So if you use the same password on for example PayPal and MyPonyForum then every time you log into MyPonyForum you send this password to the server of MyPonyForum so the operator of this server could intercept it and try it on PayPal and can issue payments in your name.
Client certificate authentication offers another way to authenticate the client in a TLS connection. In contrast to password login, client certificate authentication is specified as part of the TLS protocol. It works analogous to the way the client authenticates the server: The client generates a public private key pair and submits the public key to a trusted CA for signing. The CA returns a client certificate that can be used to authenticate the client. The client can now use the same certificate to authenticate to different servers (i.e. you could use the same certificate for PayPal and MyPonyForum without risking that it can be abused). The way it works is that after the server has sent its certificate it asks the client to provide a certificate too. Then some public key magic happens (if you want to know the details read RFC 5246) and now the client knows it communicates with the right server, the server knows it communicates with the right client and both have some common key material to encrypt and verify the connection.
In two way ssl the client asks for servers digital certificate and server ask for the same from the client. It is more secured as it is both ways, although its bit slow. Generally we dont follow it as the server doesnt care about the identity of the client, but a client needs to make sure about the integrity of server it is connecting to.
We have a wcf client, which calls an external webservice. The service is accessed over SSL. The certificate is not a self signed cert. It is issued by Verisign.
The client is hosted in IIS 6 and the application pool's identity is a domain service user.
Every time we want our client to access the remote service we get the following well known exception: "Could not establish trust relationship for the SSL/TLS secure channel with authority-.."
It turned out, that once you access the URL with IE on the same server, our WCF client is working as expected and the certificate is accepted!
My conclusion is, that the URL accessed with IE modified the server in a way, that our WCF client is able to do the validation afterwards. What is our WCF client missing?
(I'm aware that one can circumvent certificate validation by returning true in the ServerCertificateValidationCallback, but this is not an option for production.)
Considering the situation as described, I suspect that your IIS hosted client is not able to load the Verisign root certificate. And it is always a bit unclear to me under which account such IIS based client is trying to access the certificate store. It might be your domain service account user, it might be the ASP.NET user, it might be some other system defined account. This often causing the error.
When you browse the service with IE, there is no doubt about the user (your own credentials) being able to load the Verisign root certificate and resolve the trust relationship correctly.
Please:
Make sure the Verisign root certificate in in the Trusted Root Authorities store under the Local Computer Account
Have your app.config of your client refer to the correct root certificate to be loaded from the correct store.
You might want to run ProcessMonitor to find out which user is trying to load the certificate from the store.
So I have a WCF service where I have various parts of the service contract with a ProtectionLevel of Sign. I set the credentials on the client side by choosing a certificate from the certificate store. This is fine.
However ....
Does this client certificate need to be in the 3rd party certificate store on the server for this to work?
If this is the case how can I configure a service which accepts any client certificate?
And finally how do I access the signing certificate within the implementation of the operations which require signed messages? Just the signing certificate subject name would do fine!
Thanks
Ah the joy of self answering.
So
"It depends". If you have
ChainOrPeer validation then both the
chain or the presence of the
certificate in the trusted people
store results in success. Only
validating on chain obviously checks
the chain, setting Peer validation
uses the store, and None lets
everything through.
Set the validation mode to none
The SecurityContext for the request
contains an X509CertificateClaimSet
which in turn exposes the
certificate itself.