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.ClientCertificates.Add(certificate);
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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Similar Messages:
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 asp.net app.
Problem:
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.
Question:
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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Aug 30, 2010
I have created a web service that authenticates with username and password, works fine.
Basically this one, http://msdn.microsoft.com/en-us/library/ff649647.aspx
Now I also want to connect to this web service using client certificates, works fine
http://msdn.microsoft.com/en-us/library/cc948997.aspx
But I would like to when authenticated via client certificates, connect that certificate to a user in the membership database. So that I can use Roles.IsUserInRole(...) and such.
I thought that, well if I implement a Custom certificate Validator http://msdn.microsoft.com/en-us/library/ms733806.aspx then I could check for example subject and map that against a created username in the membership database.
But in the class X509CertificateValidator public override void Validate(X509Certificate2 certificate) I don't have the same ability as when the user is authenticated
like
void OnAuthenticateRequest(object source, EventArgs eventArgs)
HttpApplication app = (HttpApplication)source;
Basically how can I do this
app.Context.User = new
GenericPrincipal(new
GenericIdentity(username,
"Membership Provider"),roles);
within
public override
void Validate(X509Certificate2 certificate)
and if that is not possible, can this be solved differently? Bottom line, how do I connect a client certificate to a user account in the membership database. Is there a MSDN article on how to do this?
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Mar 14, 2011
I have created an x590 certificate that is in the file :
"C:UsersmartinAppDataRoamingMicrosoftSystemCertificatesMyCertificates"
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()
myStore.Open(OpenFlags.ReadOnly)
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)
envelopedCms.Encrypt(recipient)
Return envelopedCms.Encode()
End Function
End Class
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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, asp.net 2.0
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Jul 12, 2010
I am trying to use the X509FindType.FindBySubjectDistinguishedName option and I am not sure where to find the value for the findValue property in my config.
http://msdn.microsoft.com/en-us/library/system.security.cryptography.x509certificates.x509findtype.aspx
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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:
[Code]....
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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Nov 17, 2010
Am facing problem while consuming a java web service using WCF. below is the web.config and aspx.cs file details
Requirement
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."
<system.serviceModel>
<behaviors>
<endpointBehaviors>
<behavior name="TestClientCertificate">
<clientCredentials>
<clientCertificate storeLocation="CurrentUser" storeName="My"
findValue="certificatename" x509FindType="FindByIssuerName"/>
</clientCredentials>
</behavior>
</endpointBehaviors>
</behaviors>
<bindings>
<basicHttpBinding>
<binding name="TestHttpBinding" maxReceivedMessageSize="1048576" maxBufferSize="1048576" transferMode="Buffered">
<security mode="TransportWithMessageCredential">
<!--<transport clientCredentialType="Certificate"/>-->
<message clientCredentialType="Certificate"/>
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint name="TestHttpPort" address="https://webserviceurl/webservice"
binding="basicHttpBinding" bindingConfiguration="TestHttpBinding"
behaviorConfiguration="TestClientCertificate"
contract="ServiceReference1.webService1">
</endpoint>
</client>
</system.serviceModel>
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;
}
<system.serviceModel>
<behaviors>
<endpointBehaviors>
<behavior name="TestClientCertificate">
<clientCredentials>
<clientCertificate storeLocation="CurrentUser" storeName="My"
findValue="partnerservices" x509FindType="FindByIssuerName"/>
</clientCredentials>
<!--<serviceDebug includeExceptionDetailInFaults="true"/>-->
</behavior>
</endpointBehaviors>
</behaviors>
<bindings>
<basicHttpBinding>
<binding name="TestHttpBinding" maxReceivedMessageSize="1048576" maxBufferSize="1048576" transferMode="Buffered">
<security mode="TransportWithMessageCredential">
<!--<transport clientCredentialType="Certificate"/>-->
<message clientCredentialType="Certificate"/>
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint name="TestHttpPort" address="https://webservicespprd.biworldwide.com/partnerservices/services/v1/AccountWebService.biws"
binding="basicHttpBinding" bindingConfiguration="TestHttpBinding"
behaviorConfiguration="TestClientCertificate"
contract="ServiceReference1.AccountWebService">
<!--<identity>
<certificate encodedValue="MIIB5zCCAVCgAwIBAgIQlerVslZ+4p1Of3evhNc3TDANBgkqhkiG9w0BAQQFADAP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"/>
</identity>-->
</endpoint>
</client>
</system.serviceModel>
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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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Nov 30, 2012
Let's assume our users in their office using Internet explorer to sign some Web Pages using their client certificate imported into the Internet explorer browser (let s assume no other browser is used)
what is a good approach/architecture for validating the client certificate (Internet Explorer), how to send that certificate or the signed form to the server and how do we verify the signature
Should we use smart client approach integrated to the web application or some silverlight or so or is web form/web pages enough to implement this security requirement ?
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Oct 11, 2010
I am using a Self signed certificate for HTTPS. I have it ready. what should be changed in IIS and also what should be changed in the code for https to come into affect. I need https for some pages(not all).
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Oct 11, 2010
This is in VS 2005. And IIS is 6.0. I am trying to use Self signed certificate for HTTPS. In the code i am redirecting from http to https for few pages. It is nt working fine. and in the IIS manager, for each page that i want HTTPs, i have changed its setting by checking "Require Secure Channel(SSL)" and "Require 128 bit encryption".
public void setSecureProtocol()
{
string redirectUrl = null;
bool bSecure = true;
bool SecureConnection = true;
if (bSecure && SecureConnection)
redirectUrl = Request.Url.ToString().Replace("http:", "https:");
else
if (!bSecure && SecureConnection)
redirectUrl = Request.Url.ToString().Replace("https:", "http:");
if (redirectUrl != null)
Response.Redirect(redirectUrl);
}
Pages throw me an error like this The page must be viewed over a secure channel The page you are trying to access is secured with Secure Sockets
Layer (SSL).
Please try the following:
* Type https:// at the beginning of the address you are attempting to reach and press ENTER.
HTTP Error 403.4 - Forbidden: SSL is required to view this resource. Internet Information Services (IIS)Internet Information Services (IIS) When i try to put https in the start of the URl, it wont call. I have no idea whats wrong in here. Here, Its not redirecting from http to https. For the pages that i am not redirecting in the code behind, and changing in the IIS, i can see the HTTPS when i check the two checkboxes. Internet Information Services (IIS)
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Mar 30, 2011
There are 2 web-servers involved:
Webserver1 has been in the organization a few years and is hosting/running multiple websites with https encryption (app1.ourcompany.com, app2.ourcompany.com, etc). It has a valid, signed certificate.
Webserver2 is a new server, for which I am responsible. I am tasked with setting up https and getting the certificate, etc. It has a web app running on it, but it does not have a domain name (only has an IP address)...which as I recently learned, is a requirement for a signed certificate.
What I'd like to know is this -- is it possible to set up a site on Webserver1 that points to the site I'm hosting on Webserver2 (ie SiteOnWebserver2.ourcompany.com) which also utilizes the Webserver1's signed/verified certificate?
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Dec 23, 2010
Do you know any web site with an invalid https certificate, so I can test if my browser detects it?
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Apr 19, 2010
I'm trying to make my website more secured so want to install SSL certificate, for that I've requested a digital certificate from verisign and installed it succesfully in my server(IIS 5.1).
So everything is ready created the virtual directory and now im trying to access my site but now in the url its coming like http:\mysite.com but not https:\mysite.com.
what do we need to do extra other than installing the SSL certificate to convert it form HTTP to HTTPS.
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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 asp.net button and "digitially sign" a web-form's contents. I do not need any login information, just the X509 cert.
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Feb 8, 2010
Programatically is it possible using C# or script 1. To attach certificate to the https binding of website in IIS 7.5(from a drop down).
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Feb 25, 2011
We set up a paypal gateway on our site using paypal NVP API: Our IIS web server is set up for SSL, though I just created a cert on the locally machine. When we load HTTPS the browser gives a warning about security before the page will load. I know a local cert won't cut it for SSL, so I think we need a verisign cert? [URL] Is this correct? How can I know that the cert I am getting will get along with paypal and elimante any security warnings for the user.
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Jun 24, 2010
There is something I don't understand, When I don't put certificate at all, the SSL connection is established successfully, I wonder how the server decrypt the message without client certificate.What is client side certificate is for
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Nov 26, 2010
I developing web application to sign, verify , encrypt, decrypt data at client side with client certificate.
It's happening in server side but how can I implement it client side.
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Jun 25, 2010
I have hosted a secure WCF service on cloud with a certificate created by makecert.
Now I want to restrict the access to the service by allowing only those clients who have the certificate generated by me.
What is the best approach to implement this
* Shall I go with the changes in the configuration file
* Or Shall I write the code to validate this in the service
* Is there any other alternative?
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Feb 22, 2010
I want to make a registration page for clients, that would only contain a button register and unregister. When the user would click on any of these 2 button he would should be prompted to select a client certificate from his computer. I would also like to extract the email address from the selected certificate.
Is there any way of declaratively configuring IIS 7 to require a client certificate for just 1 .aspx page on the website. I could then extract the certificate from Request.ClientCertificate, right?
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Aug 16, 2010
I have a WCF service which accepts X.509 certificate signed incoming messages. As per my understanding the client will send the message with signature encrypted using his private key and web services will decrypt the signature with client's public key. This ensures that the sender of the message is holder of the private key and that he is certified by the server trusted CA as "He is what he claims to be".
It's being a highly secure application I need to give access to only certain clients regardless of whether they are trusted or not. (This is to take care of good turned bad scenario :-)) How do I achieve this? Is there any way to get the client information as subject name etc from his certificate in C# code? Is there any example of this usage?
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Jul 26, 2010
I need to send a X.509 client certificate to a web service in byte array (not attached to request). Besides the certificate, the caller will also send data and signed data. From the web service I can verify if the signature is ok but I don't know what is required to verify that the certificate is ok. I have the client certificate issuer CA trusted in Server (where the web service runs).
More specifically, how can I verify if a X.509 certificate itself is valid? I need to do it in web service not from IIS.
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Mar 1, 2010
I would like to identify users that connect on a intranet web server (IIS) with client certificates.
I've set up a CA server on a Windows 2003 server pc. On my development pc, i've a windows xp with a web server (IIS) running.From my web server, i generated a certificate request (i specified the netbios name of my web server because this setup is for an intranet), i used that request to generate a web server certificate and i installed it on my IIS to allow SSL connection. . Now, i can connect with https to my web server from an internet explorer. I configured the web server to 'require client certificates'.
I would like to authenticate the users with a client certificate installed on each users pc. My CA server allows users to request a client certificate (domain user) from the CA server just by typing the url of the CA server and click 'User Certificate', 'submit' and then 'Install this certificate'.
In order to test my setup, i opened a Internet Explorer from a pc which resides in the domain and i requested and installed the user certificate. Then i connected to my web server and i get a window with the title "Choose a digital certificate". This window is always empty and never proposes the client certificate i previously installed on the user pc.
I've no idea of what i missed during my setup. I'm still wondering how the browser knows how to select which certificate must be displayed according to the url typed in the address bar.
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