Security :: Reading Certificates From The Browser?
Apr 9, 2010
Is it possible to read the certificate(s) in a clients browser through code? The situation I have is, someone is going to access my website with a certificate installed. In that certificate, there will be specific information related to my application. I will be pulling that specific peice of info out, and then doing what I need to with it.
I can already read certificates from my local machine (using the X509Certificate2 class), and using string manipulation, traverse out the information needed. The only part I can't do, is pull certificates from the browser.
I have tried using the '.IsPresent' function on an HttpClientCertificate object, but that always returns false (even though I have four certificates installed on my machine).
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Similar Messages:
Mar 9, 2011
I am not sure whether I posted the question at the right place, But I don know how to start approaching the problem ,
I need to open a .cer cirtificate from the server side. The .cer cirtificate will be stored in the client browser.
I tried locally putting the cirtificate in my hard drive and I could open it and get the info I want using
X509Certificate2 certificate = new X509Certificate2("C:\OCX\abc.cer");
But what will I do when I need it to open it from client browser?
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Jun 20, 2010
I would like to do login to the website using certificates.
I want to have a secure login.
How to create certificates for login?
How certification process?
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Mar 16, 2011
I am trying to decrypt using an X509 certificate private key. I am using the following function:
[Code]....
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Mar 29, 2011
Is anyone using digital certificates in project ?I have created a digital certificate using Microsoft certificate services.I have installed this certificate on my website.When I access website over https I get digital certificate error in browser.Most common cause for this error is incorrect date/time settings on client machine. This is not the issue in my case.
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Aug 2, 2010
I was wondering if it is possible to call a webservice or send a SOAP request using a provided certificate to encrypt my password (my identity) and use another to encrypt/sign a timestamp, service header, & soap body? Does anyone have any material or sample code where I can test encryption and security too? It doesn't have to be my own certificates, I just want to see it work and then I can possibly tailor it to my needs. After the SOAP request, there will be a provided response which I assume I will have to decrypt.
I found this thread, but it doesn't seem to use signatures or an SSL connection. Does VS 2010 have some extra features to help out on this? I believe the SOAP should look like this.
<soap:Envelope>
<soap:Header>
<svchdr:ServiceHeader>
<svchdr:StaticRegion>...</svchdr:StaticRegion>
<svchdr:DynamicRegion>...</svchdr:DynamicRegion>
</svchdr:ServiceHeader>
<wsse:Security>
(Signature Info)
</wsse:Security>
<soap:Body>
...
</soap:Body>
</soap:Envelope>
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Apr 3, 2010
I am facing a problem where when a user logins for the first time it shows the following error:
The resource cannot be found. Description:HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.
[code]...
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Nov 21, 2010
I'm working on a project in ASP.Net, and it requires reading/writing to files on my server. I'm hosted at GoDaddy, and they swear they've got me at Medium Trust. When I try to read or write files that are in my own domain, I get Security Exceptions. I've tried multiple ways of opening/saving the files and they all return security errors. Here's the most recent error and offending line of code (I didn't save them all, they're all pretty much the same thing):
Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.MediaPermission, WindowsBase, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' failed.
PngBitmapEncoder pbe = new PngBitmapEncoder();
pbe.Frames.Add(BitmapFrame.Create(new Uri("ornament.png", UriKind.Relative))); <-- Error
I've also gotten the error when trying to read/write using FileStream, Bitmap.Save and new Bitmap("ornament.png"). Could there be a problem with my Web.config? Is read/write supposed to be blocked by medium trust? This is a time-sensitive project and this is a brick wall for me. The deadline is end of business day tomorrow and GoDaddy isn't responding.
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May 8, 2010
So I'm using the CreateUserWizard tool, which is working great, and have added a few custom fields to the user's Profile, which is also working great... with one exception. The fields that I'm capturing from TextBoxes are being saved to the database perfectly. But those I'm trying to capture from DropDownLists aren't being saved. No error is taking place, either in my code or at runtime, but no data is being written to the table from these particular fields.
I thought I knew how to capture data from a DropDownList in ASP.NET (I'm a newbie, but not ridiculously so), but I've tried a bunch of stuff here and nothing seems to be working. I'm posting an abbreviated version of my CreateUserWizard1_CreatedUser function below, with comments...
protected void CreateUserWizard1_CreatedUser(object sender, EventArgs e)
{
//Get the profile of the user by finding the profile by name
TextBox oUserName = (TextBox)CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("UserName");
[Code]....
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Oct 1, 2010
I am trying to open my homepage with HTTPS in my test server. Is there a way i can create Self signed certifcates and see if https works. some links or any ideas with how to do Its an ASP.Net project and IIS V6.0
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Jun 8, 2010
I've noticed that it is possible SQL Server 2005/2008 to authenticate replication accounts using certificates. Is it possible to authenticate .NET SqlConnection in the same manor?
Ideally, I'd like to do away with password authentication completely and have the aspnet user connect using a certificate stored against its account.
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Sep 3, 2010
I am fairly new to web development and have never used Digital Certificates before. I assume using a digital certificate on a silverlight web page is the same as using one on any other web page, but i thought i should check. There are a few example of digitally signing the .xap file on the internet, would it then be a case of simply buying the certificate (from verisign or somewhere similar) and distributing it to customers?
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Mar 7, 2011
I know this is probably a pretty easy thing to do and it is if I can upload the file and store it onto the hard drive of the server. What I need to do is read the text file into memory and then parse through it one line at a time. Anyone have any code that demonstrates that?
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Oct 21, 2010
I need it for the test purposes.. (don't want to see „The remote certificate is invalid..." Exception.. )
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Sep 12, 2011
There is an existing classic ASP application that uses CAPICOM to encrypt a file's content using a certificate. A new file is created with the encrypted content and put on a location from where another 3rd party web application picks up the file (with encrypted content). They use the certificate to decrypt the encrypted data .
I am re-writing this piece of the software in ASP.Net and have read a bit about the encryption algos in .Net. But I am unable to come to a solution I am aiming for.
My questions:
a.) CAPICOM and .Net encryption? Any resource that has some sort of method mapping between the two?
b.) How to encrypt the content of a file using a certificate's private key? The reason I'm looking for this is this statement
The Sign method creates a digital signature on the content to be signed. A digital signature consists of a hash of the content to be signed that is encrypted by using the private key of the signer.
Source: [URL] ....
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Dec 10, 2010
Background: From a desktop application, users will navigate to an SSL-encrypted web portal where they will have to enter a username / password if it's their first time logging in. I want to be able to securely persist their user session. I was thinking of using encrypted cookies, storing their username and a unique session token / key, but was wondering what benefits client certificates offered in terms of security.
The way I see understand it currently:
Encrypted cookies:
Saved on the user's machine just like any other cookie Since the entire site is SSL, the contents of the cookie cnnot be tampered withEasily implementableWhen a user logs in again, invalidate the token / key and issue a new one
Problems:
Anyone attempting to access the web portal on the computer with a saved session will be able to, but this is a problem with any persisted session, right?
How do I know that computer A is computer A and not just computer B that copied computer A's cookie?
Client Certificates:
A pain in the ass to install Will uniquely identify that person's computer (or can it be restricted to the user account) to the web portal If the client certificate is stolen, then the account is compromised
Question: For persisting user sessions with the utmost security, would encrypted cookies be sufficient or would I need to install client certificates? How do they differ?
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Sep 21, 2010
I write a ocx file and package into cab file.I execute some commands as below:
cabarc -s 6144 N my.cab ./MyActiveX.ocx
makecert -sv mytest.pvk -ss testCertStore mytest.cercert2spc mytest.cer mytest.spc
pvk2pfx -pvk mytest.pvk -pi "mypassword" -spc mytest.spc -pfx mytest.pfx -f
signtool sign /n "myactivex" /du http://localhost /f mytest.pfx /p "mypassword" -t http://timestamp.verisign.com/scripts/timstamp.dll my.cab
The error message appears as below when I use signtool:
SignTool Error: No certificates were found that met all the given criteria.
Number of errors: 1
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Nov 19, 2010
I have a internal site used by employees of my company that uses ASP.Net 3.5, Ajax and the Ajax Control Toolkit and is secured using https and requires a client certificate to gain access to the site. We are getting the following error when updating drop down lists on the very first page of an application wizard we have built. The page uses an UpdatePanel with PartialPagePostbacks enabled.
Sys.WebForms.PageRequestManagerServerErrorException:
An unknown error occurred while processing the request on the server. The status code returned from the server was: 413
ScriptResource.axd Line: 5
Code: 0 Char: 62099.
I have increased the maxRequestLength value to 8192Kb (which is way overkill), the readAheadBuffer to 4096Kb, set all the timeouts I can find, and this problem keeps showing up for my users. I can reproduce the error if I let the initial page site idle for 2-3 minutes before doing the partial page postback to move to the next segment. I have been chasing this now for a couple of weeks, and keep coming back to the same sites with the same answers.
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Dec 13, 2010
We have a page where we ask users to enter only password in "enter password page" (the user name is taken in previous page).
The Issue is that when the page that asks user to enter password is opened in browser and when user enters password and clicks submit button, the browser does not ask the user to remember/save password,
Due to this when user opens that page next time, user have to retype the password.
You might have seen that in almost all sites whenever we open a login page, the browser asks weather we want to remember the password for next visit.
From the research done so far, we have found that browser remembers password only when the username and password textboxs are on the same page. But in our case we split down the username textbox and password textbox in two different pages.
Is there any way to let browser ask to user weather to remember/save password in "enter password page"?
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Feb 17, 2010
We have developed a system to allow users to access another one of our web applications by placing a token in the db and then when they redirect passing this token in the browser to the new apop and using that as an authenication method. However I am thinking that it might be better to simply place this token in the browser cookie as then the user doesnt have to physically click a link they can simply do straight to it because the token wont be in the query string anymore....
Will it add much of an overhead doing it via cookies are there any disadvantages?
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Jan 13, 2011
Rather than using ASP.NET's CreateUserWizard control, I want to use the code found on MSDN's "MembershipCreateStatus Enumeration" page (http://msdn.microsoft.com/en-us/library/system.web.security.membershipcreatestatus.aspx).However, I want to have a separate code-behind file. So I created the following two files:
Register2.aspx
[Code]....
Register2.aspx.cs
[Code]....
However, when I attempt to build and execute the Register2.aspx page, my Login.aspx page is displayed in the browser instead.
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Oct 22, 2010
I am facing a problem that is i have developed a website in which diffrent people login from their respective systems but i have a problem which i want to ask is that when ever user close the browser i lost all informatioin and when user restart browser he /she has to provide password and username again i want to know how to use code to login them automatically if they were logon previously before shutingdown the PC
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Jun 2, 2010
I am finishing up my asp.net web application targeting .net 4.0. I am using VS2010.
I have deployed my application to a host server and now I am testing with multiple different browsers.
The first issue I ran into comes down to the following code:
[Code]....
If I use IE, login and click something that causes the above code to execute then currentUser is NOT null. However doing the exact same steps in FireFox currentUser is null, even though I know I am logged in as my name and other indications on the webpage confirms I am.
------------------------
Update
----------------------
Since originally posting this thread I have done more testing.
I placed a test button on a random page and the button click will update a label on that page indicating if the currentUser is null or not. This button works both in IE and in FireFox. Also both running locally and running on the host server.
----------------------
So now I am looking at what is different about the one place it appears not to work so let me try to make this clear.
I use a component called Uploadify to upload images into a database. That component calls a page/request called ImageUploader.ashx which inherits from IHttpHandler. Here is all the pertainent code from that file.
[Code]....
The problem is when calling from FireFox, imgProvider.Status = null. This is a problem because the ImageProvider will try to insert a record into my database and the column for Status cannot be null so that causes it to crash. I made the change to detect if Status = null and return the user id if so as an error message to help me debug. To understand how Status is set you only have to look at a little code in the ImageProvider class:
[Code]....
You will notice when the ImageProvider is created it calls ClearFields(). Inside ClearFields() is where it gets the currentUser and if not null it sets the UserID property, which case the setter for UserID must set Status to either Approved or Pending. Whats happening is ONLY in FireFox, and after more testing, ONLY on the host server does currentUser = null even when I am logged in. but in other areas of code I can get currentUser and it works, also this works fine with IE, it also works fine with FireFox running locally. So I have icolated it down to this specific piece of code, when using FireFox, when running on Host server.
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Dec 29, 2010
When the browser is closed (w/out clicking on log out) and user launches the site using a new session, it does not prompt user to login credential page, rather it takes the user back to the previous session.
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Jan 7, 2010
on closing the browser the command must execute...
update tablename set islogin='0'..
it is working properly on click of sign out
but
when the user close the browser ,it doesn't updated ....
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