Security :: How To Get Certificate Information Of A Website

Apr 8, 2010

I want to get the certificate information of a website. I means that i've a textbox on a page. When i enter a url in that textbox and press the button. The certificate information of that website should be returned.

Say, i've entered the [URL], Then it should return the Certificate authority, Validation period etc.

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I am looking to get the data from any given domain names SSL certificate. For example I want to put in any website address e.g. "" and my code would firstly check if an SSL certificate exists. If it does then I want it to pull out the Issuer, Subject, Valid From and Valid Until etc. The intention is to create an SSL certificate checker similar to this: [URL]

How can I do this - I have looked up loads of different things such as RequestCertificateValidationCallback and ClientCertificates etc.

would I create a HTTPWebRequest and then somehow request the client certificate and specific elements that way?

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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:


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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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Security :: Getting Client Information From X.509 Certificate In C# Code?

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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".

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I have searched and could not find any article related to "How to implement Certificate Security in
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I could able to Create sample certificates for client and Server on my local machine and was able to authenticate my client app with the certificates . These certificates are test certificates.

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There are 2 web-servers involved:

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I want to secure my certain web page of site, Displaying lock icon at status bar of browser. How do I achieve this in 2.0 using any default certificate?

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Security :: When To Use An Ssl Certificate

Jan 23, 2011

If I'm taking a password on a page, should that page be served via https and exactly how dangerous is it not to? I've tried googling this but every guide just says that ssl certificates "stop hackers seeing sensative data" with no real description of how they would do this or exactly how vulnerable your site is as a result of not having ssl.Could someone summarize how easy it is for someone to steal passwords on non-https pages? Should i even be considering doing a login page without one?

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Web Forms :: Fetch Specific Information(string) From Another Website And Display The Same In Website

Sep 21, 2010

I want design a page where the end user enters information on my page and related information is fetched from the another website on my web page.

For example: Capturing City and state name from

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Security :: How To Use Microsoft Certificate Services

Apr 10, 2010

I need to know abt Microsoft Certificate Services ...can u guys xplain in details ....I find microsoft article regarding this ....Stil cnt able to do ..Am a new bee in this kind of stuff ....

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Security :: Add Certificate For NetworkService - Win7?

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I need to add a cert. for the NetworkService account as this is what Identity of my App pool is set to, but I'm not sure how to go about doing that. Here's the steps, I take: Bring up the run command and submit "mmc"When the Management console appears I click on File > Add/Remove snap-in.Select Certificates and click AddSelect Service Account, click Next twice Then I'm presented with a bunch of Service Accounts. The ones that kind of resemble what I'm looking for are: Network Access Protection AgentNetwork ConnectionsNetwork List ServiceNetwork Location AwarenessNetwork Store Interface Service Out of the choices above, Network List Service would be my best guess.

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Security :: SSL - Programitically Locate SSL Certificate?

Mar 11, 2010

This is my first time stepping into the wonderful world of SSL. I am working on a project which forces the HTTPS protocol/ Url Scheme for certain parts of the site. I mananged to get that working fine.


There is another part of the project where I pull binary image data from a database, and then write/render the image onto the browser window. <b>I found that since I converted the site to SSL, the rendering no longer works</b>. I am now working under the believe that I must open my a System.Net.Security.SSLStream in order to stream the bytes to the Response.

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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)
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End Function
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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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Security :: Invalid HTTPS Certificate?

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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Security :: WCF Service Hosting With Certificate

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Keyset does not existDescription:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.Security.Cryptography.CryptographicException: Keyset does not existSource Error:


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Security :: Possible To Apply For Certificate For Ip Address

Sep 21, 2010

we have one e-commece website which combine one ip address and 4 domains, I want apply for one ssl certificate bind ip for this site, is it possible to be used for 4 domains? is it possible to apply for certificate for ip address?

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Security :: SSL Certificate Installation Method?

Dec 3, 2010

I have few queries regarding installation of SSL certificate.How much time will it take in installing the SSL certificate and getting the IIS https enabled?
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Security :: Certificate Mapping Does Not Work?

Feb 26, 2010

We have two different users and we want to authenticate them through "IIS Client Certificate Mapping Authentication" in IIS 7. They have certificates issued by VeriSign.When user requests a website, a pop-up appears on their browser to select a certificate. User can see both certificates and selects one of them and hit ok.We could capture Certificate attributes using

following code

HttpClientCertificate cs = Request.ClientCertificate;
Response.Write("ClientCertificate Settings:<br>");
Response.Write("Certificate = " + cs.Certificate + "<br>");

until now every thig is fine.We mapped one of two certificates to an AD user using this
"Configuring One-to-One Client Certificate Mappings". am trying to print if user is authenticated or not using following code. and it is never authenticated. I don't know what mapping does. It seems it does nothing.Response.Write (Request.ServerVariables["LOGON_USER"]) ;
Response.Write ("<BR>") ;
Response.Write ("AUTH_USER: ") ;;
Response.Write ("<BR>") ;
Response.Write("IsAuthenticated :" + User.Identity.IsAuthenticated + "<br>");
Response.Write("HttpContext.Current.User.Identity :" + HttpContext.Current.User.Identity.IsAuthenticated + "<br>");
Response.Write("Request.IsAuthenticated :" + Request.IsAuthenticated + "<br>");

Can somebody help so that I can allow user only if he supplies a certificate that is mapped to a user. Currently any user having a certificate can get into the site, site is having anonymous authentication and certificate is required.

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Security :: Get The Third Party Digital Certificate?

Aug 9, 2010

I want to create a digital signature, for my product, for creating the digital sigmature i want digital certificate. I came to know there are lot of third party available for creating digital signature. If any one know can tell some of third party for this.

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Post Client Certificate From IE And Validate Certificate On IIS / Web Server

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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Security :: Delete Encrypted Certificate Or Symmetric Key And Re Add?

Mar 24, 2010

i'm having a problem with symmetric key and certificate. the issue is, this database i'm using now is restored from a different source and ever since, i've been having problem regarding the symmetric key or certificate the error message i'd get from the aspx web pages would be "Please create a master key in the database or open the master key in the session before performing this operation" yes i did open the master key


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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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