Is there any way to pull information about which client certificate was used inside of my web service method when using <security mode="Transport>? I sifted through OperationContext.Current but couldn't find anything obvious.
My server configuration is as follows:
<basicHttpBinding>
<binding name="SecuredBasicBindingCert">
<security mode="Transport">
<message clientCredentialType="Certificate" />
</security>
</binding>
</basicHttpBinding>
I'm working with a third party pub/sub system who is unfortunately using DataPower for authentication. It seems like if I'm using WCF with this configuration, then I'm unable to glean any information about the caller (since no credentials are actually sent).
I somehow need to be able to figure out whose making calls to my service without changing my configuration or asking them to change their payload.
Yes, but it's unintuitive.
First, be sure and reference the System.IdentityModel assembly from your service library.
Now, add something similar the following to your service method where you would like to know about the client certificate:
// Find the certificate ClaimSet associated with the client
foreach (ClaimSet claimSet in OperationContext.Current.ServiceSecurityContext.AuthorizationContext.ClaimSets)
{
X509CertificateClaimSet certificateClaimSet = claimSet as X509CertificateClaimSet;
if (certificateClaimSet != null)
{
// We found the ClaimSet, now extract the certificate
X509Certificate2 certificate = certificateClaimSet.X509Certificate;
// Do something interesting with information contained in the certificate
Debug.Print("Certificate Subject: " + certificate.Subject);
}
}
Hope this helps!
Related
I am using Visual Studio 2019 to try to create a .Net 4.5.2 client that consumes a remote Web service using SOAP over HTTPS. To authenticate, the service requires a client certificate be attached to all requests. The client instantiates the System.ServiceModel.ClientBase class. It seems no matter how I generate the client class, I cannot set the ClientCredentials I think because the ClientCredentials are read-only.
Here's the commands I used to generate the client class:
svcutil.exe /t:metadata https://example.com?WSDL
svcutil.exe /language:cs /config:app.config /messagecontract *.xsd *.wsdl
Here's the binding I use in my web.config file:
<bindings>
<basicHttpBinding>
<binding name="TCSOnlineServicePortBinding">
<!-- I am not sure of the mode below, message also does not work -->
<security mode="TransportWithMessageCredential">
<transport clientCredentialType="Certificate" proxyCredentialType="None" />
<message clientCredentialType="Certificate" algorithmSuite="Default" />
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="https://example.com"
binding="basicHttpBinding" bindingConfiguration="TCSOnlineServicePortBinding"
contract="TCSOnlineService" name="TCSOnlineServicePort" />
</client>
Here's the code that doesn't work:
var TCSSvcClient = new TCSOnlineServiceClient(tcs_endpoint, TCSEndpointAddr);
var aCert = new X509Certificate2();
... [omitting code to find cert in MY store]
// The line below leave the ClientCertificate.Certificate set to NULL????? Why??
TCSSvcClient.ClientCredentials.ClientCertificate.Certificate = aCert;
// This also does not work, certificate is left NULL
TCSSvcClient.ClientCredentials.ClientCertificate.Certificate = new X509Certificate2();
Can anybody see what I'm doing wrong? Thanks in advance.
We had better configure the certificate by using the LocalMachine store and then add the current user running the client application to the management group of the private key of the certificate.
ServiceReference1.TestServiceClient client = new ServiceReference1.TestServiceClient();
client.ClientCredentials.ClientCertificate.SetCertificate(StoreLocation.LocalMachine, StoreName.My, X509FindType.FindByThumbprint, "9ee8be61d875bd6e1108c98b590386d0a489a9ca");
var result = client.GetResult("a");
result = client.Test();
Console.WriteLine(result);
For the client’s certificate generated with Powershell, we had better target the application DotNet4.6.2 or above.
There is a problem to supply a client certificate in this way. We need to ensure that the current user can read the private key of the certificate.
TCSSvcClient.ClientCredentials.ClientCertificate.Certificate = new X509Certificate2();
Besides, authenticating the client with a certificate requires a trust relationship between the client-side and the server-side. have you established the trust relationship before calling the service?
https://learn.microsoft.com/en-us/dotnet/framework/wcf/feature-details/transport-security-with-certificate-authentication
Feel free to let me know if there is anything I can help with.
Some clients need to be able to connect to our WCF SOAP services using Basic authentication, while others need to use Windows authentication. We normally host our services in IIS, although we do provide a less-developed Windows Service hosting option.
It's my understanding that it is not possible to configure one endpoint to support both Basic and Windows authentication. So we have two endpoints per service.
<endpoint address="" binding="basicHttpBinding" bindingConfiguration="BasicBinding" contract="SomeContract" bindingNamespace="http://www.somewhere.com/Something" />
<endpoint address="win" binding="basicHttpBinding" bindingConfiguration="WindowsBinding" contract="SomeContract" bindingNamespace="http://www.somewhere.com/Something" />
...
<bindings>
<basicHttpBinding>
<binding name="BasicBinding">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Basic"/>
<message clientCredentialType="UserName"/>
</security>
</binding>
<binding name="WindowsBinding">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Windows"/>
<message clientCredentialType="UserName"/>
</security>
</binding>
</basicHttpBinding>
</bindings>
These are in the same Web Application in IIS. That Web Application has both Basic and Windows authentication enabled (else one of the above bindings wouldn't work).
When a client uses the Windows-authenticated endpoint (with "win" on the end of URL), this typically works fine. When the initial request doesn't contain any authentication information, a negotiation takes place between the client and IIS, they settle on Windows authentication and all goes well.
When a client uses the Basic-authenticated endpoint (without "win" on the end of URL), this works if they include the Authorization HTTP header with the correct encoded credentials in it. However, if they do not include any authentication information in the initial request, the negotiation ends up choosing Windows authentication. This gets the request past IIS security, but WCF then refuses the request, because it's going to a Basic-authenticated endpoint.
I am rather hazy on exactly what's happening in the negotiation. But it seems to me that IIS offers all authentication methods enabled for the Web Application (i.e. Basic and Windows), even though the particular WCF endpoint URL for the request only supports Basic.
I would like to know if there is anything we can do in IIS to make the negotiation come up with the right answer: that is, if the request is to a Basic-authenticated endpoint, tell the client to use Basic. Of course, we still want the negotiation to end up choosing Windows, when the request went to the Windows-authenticated endpoint.
If there isn't, then do you think we would be better off concentrating on our Windows Service-hosted version of the services? Or would that have similar problems somehow?
Final note: we do use Basic with HTTP for some internal uses, but we do know that this is an insecure combination. So we typically turn on HTTPS for production use; I've left that out here, for simplicity.
Yes, clientCredentialType="InheritedFromHost" solves the problem for me. This, new in .Net 4.5, means that one can now use the same endpoint URL for more than one authentication type. IIS settings control what authentication is allowed, meaning no longer possible to get IIS and WCF settings in conflict.
Ok, I have seen several questions related to this issue, and I have tried a lot of the ideas presented in them with no success. Here's my situation:
I'm hitting a web service over my company's intranet. I have used svcutil.exe to generate the client class for WCF. I was able to run the web service call with no problem when the service was in development and did not require authentication credentials, so I know the code works. At the time, the code was running over SSL. I imported the required certificate into the Trusted Root Certification Authorities store, and everything was fine.
We just moved to a stage environment, and the service was upgraded to require credentials to connect. I switched my connection to the new endpoint, and added code to authenticate. This is my first time working with wcf, so please bear with me on any obvious mistakes. My problem is that I cannot locate the certificate via code to pass to the service for authentication. I am basing this off of some online code examples I found.
Here is an example of my config generated by svcutil:
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding
name="xxxSOAPBinding"
.... (irrelevant config settings)....
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<security mode="Transport">
<transport clientCredentialType="Certificate" />
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="https://xxxServices_1_0_0"
binding="basicHttpBinding" bindingConfiguration="xxxSOAPBinding"
contract="xxxService" name="xxxService" />
</client>
</system.serviceModel>
And here is the code I am using to try to connect. The exception is thrown as soon as I attempt to locate the certificate:
using (var svc = new xxxServiceClient())
{
svc.ClientCredentials.UserName.UserName = "XXX";
svc.ClientCredentials.UserName.Password = "XXX";
svc.ClientCredentials.ClientCertificate
.SetCertificate(StoreLocation.LocalMachine, StoreName.Root,
X509FindType.FindBySubjectName, "xxx");
...
}
I have tried several different X509FindTypes, and matched them to the values on the cert with no success. Is there something wrong with my code? Is there another way I can query the cert store to validate the values I am passing?
The dev machine where I am running Visual Studio has had the cert imported.
Two silly questions:
are you sure your certificiate is installed at all?
is this a certificiate specifically for this staging machine?
Also, it seems a bit odd you're first of all setting username/password, and then also setting the credential. Can you comment out the username/password part? Does that make any difference?
Marc
Are you sure the the certificate has been imported to the local machine store, it could be in the CurrentUser store.
This may sound stupid, but are you certain the new cert for the staging service has been installed into your cert store? That's most likely your problem.
Also, since you didn't mention what exception is thrown, it's possible the problem is that you've set username/password credentials before setting clientcertificate credentials, when your binding does not indicate the use of username/password. Could be a problem there; they're mutually exclusive, IIRC.
I am working on a Silverlight v3 web app and I would like to secure access to the WCF service I am using to fetch my data. I currently have the WCF working just fine, but it doesn't require any user credentials.
I'm not very experienced with this aspect of WCF, so my first idea was to add username and password parameters to each of my service's operations. The problem I have with this is that this would require a lot of redundant code, and the fact that the username and password would be transferred over the wire in plain text.
What I would like is a way to specify the credentials upfront on the client side right after I create my service proxy (I am using the proxy autogenerated from "Add Service Reference").
Upon googling for a solution to this, I could only find solutions that similar to my first idea (using username/password parameters). Could someone please point me in the right direction?
Thanks!
Where are these usernames and passwords coming from? If your web site already implements Forms authentication then you can bypass setting credentials yourself and use the forms authentication cookie. If your users are logged in then the cookie will travel with the web service call. In order to read it on the other side you need to make a couple of changes.
First you need to enable ASP.NET compatibility mode for WCF in the system.ServiceModel section:
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
</system.serviceModel>
Once that is done then for each service method you want to understand the ASP.NET cookie add the [AspNetCompatibilityRequirements] attribute to your service class
[ServiceContract]
[AspNetCompatibilityRequirements(
RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class ExampleService
{
}
Now within each method you can access the HttpContext.Current.User.Identity object to discover the user's identity.
If you only want certain methods to be called by authenticated users then you can use a PrincipalPermission thus
[OperationContract]
[PrincipalPermission(SecurityAction.Demand, Authenticated=true)]
public string Echo()
As a bonus if you're using ASP.NET's role provider then those will also be populated and you can then use a PrincipalPermission on methods to limit them to members of a particular role:
[OperationContract]
[PrincipalPermission(SecurityAction.Demand, Role="Administators")]
public string NukeTheSiteFromOrbit()
And this works in Silverlight2 as well obviously.
Don't roll your own and add explicit parameters - that is indeed way too much work!
Check out the WCF security features - plenty of them available! You can e.g. secure the message and include credentials inside the message - all out of the box, no extra coding on your side required!
Check out this excellent article on WCF security by Michele Leroux Bustamante: http://www.devx.com/codemag/Article/33342
In your case, I'd suggest message security with user name credentials - you need to configure this on both ends:
Server-side:
<bindings>
<basicHttpBinding>
<binding name="SecuredBasicHttp" >
<security mode="Message">
<message clientCredentialType="UserName"/>
</security>
</binding>
</basicHttpBinding>
</bindings>
<services>
<service name="YourService">
<endpoint address="http://localhost:8000/MyService"
binding="basicHttpBinding"
bindingConfiguration="SecuredBasicHttp"
contract="IYourService" />
</service>
</services>
And you need to apply the same settings on the client side:
<bindings>
<basicHttpBinding>
<binding name="SecuredBasicHttp" >
<security mode="Message">
<message clientCredentialType="UserName"/>
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost:8000/MyService"
binding="basicHttpBinding"
bindingConfiguration="SecuredBasicHttp"
contract="IYourService" />
</client>
Now your server and client agree on the security - on the client, you'd then specify the user name and password to use like this:
YourServiceClient client = new YourServiceClient();
client.ClientCredentials.UserName.UserName = "your user name";
client.ClientCredentials.UserName.Password = "top$secret";
On the server side, you'll need to set up how these user credentials are being validated - typically either against a Windows domain (Active Directory), or against the ASP.NET membership provider model. In any case, if the user credentials cannot be verified against that store you define, the call will be rejected.
Hope this helps a bit - security is a big topic in WCF and has lots and lots of options - it can be a bit daunting, but in the end, usually it does make sense! :-)
Marc
you can pass in some sort of authentication object and encrypt it at the message level with WCF. C# aspects (http://www.postsharp.org/) can then be used to avoid redundant logic. Its a very clean way of handling it.
I have a WCF service that uses basicHttpbinding in development.
Now in product we want to use SSL, what changes do I have to make to force SSL connections only?
This page on MSDN explains WCF Binding Security.
http://msdn.microsoft.com/en-us/library/ms729700.aspx
The BasicHttpBinding class is
primarily used to interoperate with
existing Web services, and many of
those services are hosted by Internet
Information Services (IIS).
Consequently, the transport security
for this binding is designed for
seamless interoperation with IIS
sites. This is done by setting the
security mode to Transport and then
setting the client credential type.
The credential type values correspond
to IIS directory security mechanisms.
The following code shows the mode
being set and the credential type set
to Windows. You can use this
configuration when both client and
server are on the same Windows domain.
C#
BasicHttpBinding b = new BasicHttpBinding();
b.Security.Mode = BasicHttpSecurityMode.Transport ;
b.Security.Transport.ClientCredentialType = HttpClientCredentialType.Windows;
Or, in configuration:
<bindings>
<basicHttpBinding>
<binding name="SecurityByTransport">
<security mode="Transport">
<transport clientCredentialType="Windows" />
</security>
</binding>
</basicHttpBinding>
</bindings>
To enable ssl, without a login, set clientCredentialType to "None".
Options for security mode are:
None, Transport, Message, TransportWithMessageCredential and TransportCredentialOnly
You can find more details at: http://msdn.microsoft.com/en-us/library/system.servicemodel.basichttpsecuritymode.aspx
I just faced the same problem and found this MSDN article:
How to: Configure an IIS-hosted WCF service with SSL
At the end of the article you will find the xml configuration of the WebConfig file.
The solution worked just fine for me. One more thing to say, keep in mind that you need a REAL certificate for your release!
I think that if under your bindings where you have the <Security mode="Transport">, if you would change it to be <security mode="None">, you would be ok.
This is a copy of a code base that I'm working on and I tried that in-code, and it appears to be working.
I get the WSDL at least when I call the service, if that helps at all.
BasicHttpBinding basicBinding = new BasicHttpBinding();
if (RegistryConnectionStringFactory.UseSslForCommunications)
{
basicBinding.Security.Mode = BasicHttpSecurityMode.TransportWithMessageCredential;
basicBinding.Security.Message.ClientCredentialType = BasicHttpMessageCredentialType.UserName;
}
else
{
basicBinding.Security.Mode = BasicHttpSecurityMode.None;
basicBinding.Security.Message.ClientCredentialType = BasicHttpMessageCredentialType.UserName;
}