Security :: Request A Client's X509 Cert W/o Windows Auth

Mar 15, 2010

Is it possible to request an X509 certificate from a client without configuring the application to use Windows Authentication? The purpose would be to press an button and "digitially sign" a web-form's contents. I do not need any login information, just the X509 cert.

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Security :: X509 - Client Certificate Infrastructure

Sep 9, 2010

I dont have a lot of background with SSL and X509 configuration and support with my Asp.Net application, so I was wondering if someone can explain or point me in the right direction to MSDN or any other article or posting explaining if it's possible to do what I am looking to support in my environment.

I have IIS 6.0 with SSL (Verisign cert) as well as "Require client certificates" working against a local installation of Microsoft Certificate Services, https://<domain>/certsrv, where users can request and install client certs (both xp clients for basic
mode, and Vista/7 for advance mode).

Here's what I am up against:

I have a segment of users coming from a virtualized server environment where this environment does not store personal settings for more than 48 hours. It's not an internet cafe, but rather an actual business where their IT staff uses server images to reimage each virtual server in the farm every 48hrs. Thus losing all users data in the "Current Users" Certificate Stores.

The IT staff give users a network folder share to store any personal items (docs, spreadsheets, links, etc.). The servers consist of Windows Server 2003, and will be migrating to Windows Server 2008 in the next 6-9 months.

These users have rights in Internet Explorer to navigate to my certsrv site and use activex to to request and install certificates then clode and reopen the broser to navigate and render the app.


It's a pain to ask the users to request and have issued a client certificate every 48 hours.

The IT staff of this company has asked if I can create some sort of certificate that they can load in the "local computer" certificate store, NOT the "Current User" store, that will be made part of their base image for all their servers, and that this certificate is then used to properly authenticate all users on these servers to my IIS with "require client certificates" selected.


Is this possible, and if so what can I do on my side to create the proper certificate to give to the IT staff at this business to put into their servers "local computer" certificate store? I assume either under the Personal->Certificates store, or under the "Trusted Root Certification Authorities"->Certificates store. Thus allowing any user of these servers in their thin client virtual environment to open I.E., navigate to my site and select a certificate from the "Choose a digital certificate" popup that allows them to render my Asp.Net application, or avoids this popup altogether.

If this is the wrong forum to post in, please advise and I will move. Probably due to vernacular on my part, I have been unable to find any resources on here, MSDN or Bing to help me solve this problem.

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Using Windows Auth, But Getting Redirected To Forms Auth Login Page?

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We're running IIS7 and have windows authentication enabled. Everything else is disabled. When we go to the page though, we aren't prompted for a windows logon, but are redirected to the default forms authentication login page (Accoun

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Nov 23, 2010

I am working on a site that uses windows authentication, but I have one page for password resets that I want to allow anonymous access to.I have tried doing authorization, allow users="*", but it doesn't appear to work with this.Do I need to have another seperate site for this section?

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Security :: Windows Auth - Still Showing Login Prompt In IE?

Sep 17, 2010

I'm trying to setup my IIS 7.0 MVC2 site but having problems.I want to use Integrated Security so that the app can obtain the user's credentials. We can then do a look-up of some AD groups to determine what they can do from that point onwards.The problem is - Every time we browse to the application, instead of navigating to our main page immediately, we get a login prompt provided by IE. I've read that we need to make sure that in the browser's Tools->Options->Advanced-> (Securiy-> ENable Windows Intagrated Security) must be checked - which it is on ALL 3 machines where I try this.

The machines AND the server are all in the same domain.My config file states <authentication mode="Windows" /> and I've tried every combination for <identity...> and <authorization...> but to no avail. I can only get the "login" prompt to go away if I enable Anonymous Authentication - but then I can't detect the windows user or their group membership.

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Security :: WCF Data Service Can Use As Forms Auth ASP Auth Source?

Sep 26, 2010

if it is possible to use a WCF Dataservice as the MemberShipProvider for a forms auth application. I have written code for a provider (below), but I do not know what to do as far as a connection string, or any other web.config properties.
Please Help!!! Here is the code for my provider, anytime it says Odbc that is because I based this off of the custom Odbc provider on the msdn site. The only ACTUAL references to any odbc connection are in the comments:


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Security :: Forms Auth - Losing Auth State?

Feb 23, 2011

Been scratching my head on this one today quite a bit. Time to ask the guru's.Implementing your basic Forms Auth for a 2.0 web app in conjunction with SQL Membership Provider and Role Provider. Web.Config from virtual directory root


All other subdirectories do not contain web.config files but rather wanted them to just work off inheritence from the root web.config. Upon publishing of this setup - I am having one hell of a time maintaining the user 'authenticated' state. (Not sure if that's the best explanation of what is going on.. but)

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Security :: Catch A Failed Login Attempt (Windows Auth) And Redirect To A Forms Login Page?

May 26, 2010

I need to create an application with Forms Authentication and/or Windows Authentication. If the application is set to use mixed authentication (Forms + Windows Auth) and the user don't have a Windows user account, the login will fail and he must be redirected to a forms login page. How can I do this?

Are there any different way to provide mixed authentication?

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C# - Can't Connect To HTTPS Using X509 Client Certificate

May 24, 2010

I'm new to cryptography and I'm a bit stuck:

I'm trying to connect (from my development environment) to a web service using HTTPS. The web service requires a client certificate - which I think I've installed correctly.

They have supplied me with a .PFX file. In Windows 7, I double clicked the file to install it into my Current User - Personal certificate store.

I then exported a X509 Base-64 encoded .cer file from the certificate entry in the store. It didn't have a private key associate with it.

Then, in my app, I'm attempting to connect to the service like this:

var certificate = X509Certificate.CreateFromCertFile("xyz.cer"));
var serviceUrl = "https://xyz";
var request = (HttpWebRequest) WebRequest.Create(serviceUrl);
request.Method = WebRequestMethods.Http.Post;
request.ContentType = "application/x-www-form-urlencoded";

I get a 502 Connection failed when I connect.

Is there anything you can see wrong with this method? Our production environment seems to work with a similar configuration, but it's running Windows Server 2003.

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Security :: WCF/ASMX, SSL, Getting Forbidden Error Even Though Cert Is Attached

Mar 21, 2011

I'm running into an issue connecting to a web service that is protected with a ssl cert. I have the PFX key, and have included the WSDL in my project. However, i always get a "Forbidden" error. At first I thought this was just a problem with the key, so we regenerated the certs and keys and tried again... Still Forbidden. The group who is hosting the web service turned up their logging and found that my cert is NOT being passed. Yet when I look at my call to the webservice, I can see the cert is attached to the object.

Is there anything I'm doing obviously wrong?

Apologies for this being in VB.NET ;)


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Security :: Decrypting Using X509 Certificates?

Mar 16, 2011

I am trying to decrypt using an X509 certificate private key. I am using the following function:


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Security :: Encrypting With An X509 Certificate.

Mar 14, 2011

I have created an x590 certificate that is in the file :

I am trying to acces the public key to encrypt some plain text.

The system is throwing an "System.ArgumentOutOfRangeException" at the line

Dim certificate As X509Certificate2 = certificateCollection(0)

Can anyone tell me where I am going wrong or tell me another way to access the public key

This is the complete code:
Imports System.Security
Imports System.Security.Cryptography.X509Certificates
Imports System.Security.Cryptography.X509Certificates.X509Certificate2
Imports System.Security.Cryptography.Pkcs
Partial Class encryptwithcertificare
Inherits System.Web.UI.Page
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim encoding As UTF8Encoding = New UTF8Encoding
Dim cleartext As String = Textbox1.Text
Dim myStore As X509Store = New X509Store()
Dim certificateCollection As X509Certificate2Collection = myStore.Certificates.Find(X509FindType.FindBySubjectName, "bobby", True)
Dim certificate As X509Certificate2 = certificateCollection(0)
Dim code() As Byte = EncryptwithCertificate(cleartext, certificate)
Label1.Text = Convert.ToBase64String(code)
End Sub
Shared Function EncryptwithCertificate(ByVal cleartext As Byte, ByVal certificate As X509Certificate2) As Byte()
Dim encoding As UTF8Encoding = New UTF8Encoding
Dim cleartextsbyte() As Byte = encoding.GetBytes(cleartext)
Dim contentinfo As ContentInfo = New ContentInfo(cleartextsbyte)
Dim envelopedCms As EnvelopedCms = New EnvelopedCms(contentinfo)
Dim recipient As CmsRecipient = New CmsRecipient(certificate)
Return envelopedCms.Encode()
End Function
End Class

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Security :: Using A X509 Certificate In A Web-service

Jun 17, 2010

I have a rather strange situation that I am in.

I have to write a web-service that will (among other things) communicate with another web service. When we communicate with that remote web-service we are required to use a certificate that they provided.

I am having a really hard time trying to find any sample code that does this.

I have found code for installing certs when you want to use a browser to communicate, but none when you are using a web-service to web-service and you are required to HAVE the certificate, not requiring the OTHER end to have the certificate.

So far I cannot even find code to allow me to parse throught the cert store. Samples I found online show up as errors in Visual Studio 2005.

Note: This is running one Windows 2000, designed with Visual Studio 2005, 2.0

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Jun 7, 2010

I have an application we bought that I need to integrate, and it uses jakarta connection to get to the application from IIS.So, the basic operation is

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Security :: Add CSP Information To X509 Certificate Programmatically

Mar 3, 2010

I'm working on a project for a large company that wants to create a crypto toolbox for cross-platform signing and encrypting and am constantly running into problems concerning the cryptographic abilities in the .Net framework. The blazing inferno that I need to put out this time is that SignedCms and EnvelopedCms don't seem to work with a Cryptographic Service Provider that doesn't store the private-key on the Windows machine. I'm working with a network HSM and certicates that have only a public key, that is, no private-key and no information in the store as to where that private-key resides or how you can access it (a RSA public/private key pair is created on the machine, using the HSM supplier's CSP, and a certificate signing request is generated and used to create a public-key certificate signed by the CA). Theoretically the private key gets picked up from the HSM (referenced actually) using the CspParameters given when instantiating the class, which specifies the CSP provided by the HSM supplier. Unfortunately, up to now this only works with CAPI, where can associate the cryptographic service provider with the signing certificate (usign CertSetCertificateContextProperty with CERT_KEY_PROV_HANDLE_PROP_ID). (We're using CAPI for PKCS#7 signing because the .Net framework only supports signatures up to SHA1 and we have a minimum of SHA256). Surprisingly enough CmsSigner accepts a CSP in it's constructor but it cannot get the key, it throws an exception during instantiation from method CreateDummyCertificate for some reason (with the message "Process completed." no less!??). I use the following CspParameters:


CmsSigner cmsSigner = new CmsSigner(cspParams);

This process works great with certificates and key pairs created by MakeCert. With MakeCert you can associate the CSP information with the Certificate upon creation (-sk, -sp, -sy). The private key still resides in the HSM but specifying the provider during the creation of the certificate seems to have persisted the CSP information somewhere, somehow. Exactly how that's done I don't know, but if could do that, my problem would be solved.

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WCF / ASMX :: Web Service Security Using X509 Certificate

Nov 17, 2010

Am facing problem while consuming a java web service using WCF. below is the web.config and aspx.cs file details


Service request and response will be encrypted with certificate. when i run this below code am getting the error "The private key is not present in the X.509 certificate."

<behavior name="TestClientCertificate">
<clientCertificate storeLocation="CurrentUser" storeName="My"
findValue="certificatename" x509FindType="FindByIssuerName"/>
<binding name="TestHttpBinding" maxReceivedMessageSize="1048576" maxBufferSize="1048576" transferMode="Buffered">
<security mode="TransportWithMessageCredential">
<!--<transport clientCredentialType="Certificate"/>-->
<message clientCredentialType="Certificate"/>
<endpoint name="TestHttpPort" address="https://webserviceurl/webservice"
binding="basicHttpBinding" bindingConfiguration="TestHttpBinding"

in page
protected void Page_Load(object sender, EventArgs e)
WebServiceClient abc = new WebServiceClient();
BindingElementCollection elements = abc.Endpoint.Binding.CreateBindingElements();
elements.Find<SecurityBindingElement>().IncludeTimestamp = true;
abc.Endpoint.Binding = new CustomBinding(elements);
WebServiceClientResponse xyz = abc.WebMethod("", "");
private static bool customXertificateValidation(object sender, X509Certificate cert, X509Chain chain, System.Net.Security.SslPolicyErrors error)
return true;
<behavior name="TestClientCertificate">
<clientCertificate storeLocation="CurrentUser" storeName="My"
findValue="partnerservices" x509FindType="FindByIssuerName"/>
<!--<serviceDebug includeExceptionDetailInFaults="true"/>-->
<binding name="TestHttpBinding" maxReceivedMessageSize="1048576" maxBufferSize="1048576" transferMode="Buffered">
<security mode="TransportWithMessageCredential">
<!--<transport clientCredentialType="Certificate"/>-->
<message clientCredentialType="Certificate"/>
<endpoint name="TestHttpPort" address=""
binding="basicHttpBinding" bindingConfiguration="TestHttpBinding"
<certificate encodedValue="MIIB5zCCAVCgAwIBAgIQlerVslZ+4p1Of3evhNc3TDANBgkqhkiG9w0BAQQFADAP

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Security :: Implement Client Certificate In Windows 7 Running IIS 7.5?

Feb 12, 2011

I want to implement client certificate in IIS 7.5 in windows 7. As per my knowladge I need to setup server certificate first for IIS. But I could not figure out how to do that.

View 2 Replies - IIS7 Itegrated Pipeline Mode: Context.User Is Intermittently Null For Windows Auth?

May 19, 2010

Our code relies on checking the Context.User.Identity value in the Global.asax Application AuthenticateRequest(...) method to retrieve some information about the logged in user. This works fine in classic mode but when I flip IIS to use the Integrated Pipeline "Context.User" comes back as null, but only intermittently.I have < authentication mode="Windows"> and only Windows Auth enabled in the Virtual Directory.

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Security :: View A Current Users X509 Certificate Store

Mar 15, 2011

Quick question: is it possible to retrive a users certificate store i.e. list all of the client's Personal Certificates?

Just to be clear, I am talking about the certificates installed on the clients machine, not the servers. I have managed to list the server's certificates, but so far have been unsuccesful with the above.

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Forms Auth Or Custom Header Auth For Odata Which Is Better

Nov 18, 2010

I need this up and running quick but I spent the last few hours researching/worrying about which would be better: Forms Authentication
Custom Header Token:
On the server

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Security :: ASP 4.0 And Custom SQL Server DB For Forms Auth

Sep 22, 2010

I have done some research and tried to find answers on how to integrate forms authentication with ASP.NET but all I can find is for 2.0. I don't mean to sound ignorant or annoying about it, but does anyone have a quick link to somewhere where I could find out how to integrate a custom SQL Server DB (with username, password, id, etc columns for user) with ASP.NET 4.0?My application is actually a Silverlight Business Application where I am trying to log in/register users in a separate Database in a SQL Server 2008 engine

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Security :: Create Auth Ticket To Jump From One Application To Another?

Oct 31, 2010

Let's say I'm currently authenticated in an application (namely: applicationA) and I click a link that will take me to another application (namely: applicationB). Is it correct that in order to bypass authentication of applicationB, I'll just create a ticket for that application telling the web server that I'm already authenticated?

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Security :: WCF Web Service Call Does Not Authenticate Using Forms Auth?

Jun 8, 2010

I am having difficulty deploying a Silverlight 4 RIA services Web app to IIS 6 on Windows Server 2003. The application works fine when running on the development server. However, when deployed to a production server, all the Web service calls redirect to the login page.

Here are the details:

The site uses forms authentication. Login is via an ASP.NET Web page; the Silverlight application does not have its own version of the login page. Login is working correctly.

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Security :: Forms Auth Logonview Control Not Visible?

Feb 17, 2010

as there is so much code a built a demo project


MSVS 2005 2.0
ajax Enabled site
MS SQL server 2005

User/logon On server required name: MyDBLogon, access to project database MyFormsAuth

Download project from here : Select 'Download this media' as the top of page) Also I use the FREE trial demo of this tool :

Project : The Member logs on with email address and password.

admin logon is :, password is 12345

The issue: I use Logonview control to show menu for each role type. See 'controls' folder.

When You first run the project you will see it in the main page...LIke

"Admin, Members, MembersX, Welcome etc" works fine.

The test.. close browser, to test Authentication ticket cookie.

Re run view project ( we are now testing the forms authentication process as cookie is being read to see if authentictaion is still active).

When the page runs, and authenication is active, proven by going to public page IsAuthenticated=true", fine, BUT The page direction usercontrol ( ie logonview control) is not visible, it doesnt work on the new browser run ??

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Security :: Extending Asp Forms Auth To Be Multi Tenant / Domain?

Jan 24, 2010

I am developing a web application which implements membership, roles and profiles. I also want it to be multi-tenant / multi-domain. By this I mean that I will have hundreds of domain names pointing at the same web application. I want users to be able to create accounts at each individual domain. I want the opposite of "single sign on". I want users to be able to use the same username, email address and password (or different ones, at their choice) to create accounts at the different sites. I do not want users to have any awareness that the different domains have any relation to each other as they will look different and have different content. The first problem I run into is that usernames have to be unique within the forms auth aspnet db.

Well, if they want to use the same username to register on 10 different sites then I need to support that. My first thought was that instead of identifying a user by their username, I need to extend the aspnet tables and sprocs to consider the username + a unique site identifier. Is there any sample code or has anyone else ever done this before? Should I just abandon the built in aspnet forms auth and roll my own custom auth scheme? The data on the sites is not sensitive so security isn't really that important to me.

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