.NET Webform Cookie Security?
Apr 4, 2011If client use cookie auto login for 30 days.hacker could login and change user information when get the client cookies. How to prevent this?
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Security - How To Create An Authentication Cookie
Jan 29, 2010Do we know the algorithm that asp.net uses to create the authentication cookie (when using forms authentication?)
Can we basically create our own copy implementation? if so, how?
What does it use to generate the encrypted cookie value, I know it uses whatever you pass into the SetAuthCookie call (which is usually the userID/username).
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I though about using a Guid,in the cookie,and then check the database to see if that guid is available,but this could be a sort of password like effect.
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Security :: Restricting Access To An ASPX Webform?
Dec 11, 2010I have seen an existing post which explains how you can restrict access to an ASPX page using:
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This works as in it keeps those who are not a member of Administrators AD Group from being able to view the webform but for some reason when I implement the above it locks even the Administrator user out which is not what I wanted at all.My web.config is as:
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As you can see I have tried to restict it also through the web.config file but neither approach has worked.
Security :: Accessing Controls Of A Webform From Another In The Same Application?
Feb 5, 2011i am building a web application and i want to access a textbox which is on the index page from the login page. basically what i did is this. i programmatically created my registration form for new users and also login for registered users, now i want to display on the index page the name of the logged on user on the index as the page loads.
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Nov 6, 2010I have a bunch of applications that currently share the authentication cookie in v3.5.
We're in the process of upgrading to 4.0 and also upgrading the applications as a whole. I have 1 done, and would love to deploy it. However, as soon as I do, I lose my sharing of authentication cookie in that application.
In each web.config, my machine key is declared. I removed the actual keys to protect the innocent. :)
<machineKey validationKey="..." decryptionKey="..." validation="SHA1"/>
<authentication mode="Forms">
<!-- DEV Server -->
<forms enableCrossAppRedirects="true" loginUrl="Logon.aspx" name=".COOKIENAMEHERE" protection="All" path="/" slidingExpiration="true" timeout="1440"/>
</authentication>
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Mar 8, 2010I have two websites (domain and subdomain), something like this: www.website.ro and en.website.ro and I am trying to share a cookie between them. I have set the cookie domain to "website.ro", I tried setting it to ".website.ro", but it doesn't work. I can only read the cookie in the website that created it.
View 5 RepliesSecurity :: How To Write A Cookie For A Different Sub-Domain With No Encryption
Aug 10, 2010I'd like to write out a cookie for a different sub-domain than the one I'm running in. Basically, what I want to do is have a php forum page automatically be authenticated from the asp.net login.That is, I have[URL]When the user log's in to www.mysite.com, I want to write a cookie out that the forum.mysite.com can pick up. It's only going to have the username in it so no encryption is needed. Nothing unsafe best I can tell. I've tried the below code but that still seems to make an encrypted cookie. I need to read it back into php unencrypted.
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How To Decrypt Public ASPXAUTH Cookie And Security
Mar 18, 2010Due to a bug in Flash, I have to use the ASPXAuth cookie to log a user in on a page that a flash upload script calls after upload. See this page for more information: [URL]
I have to make the ASPXAUTH string "public" in the sense that it will be in the HTML of the page. My question is, how secure is this?
I understand that anyone that can get to the string in the HTML can probably get to it from the cookie just as easily, but let's say someone does have this ASPXAUTH string. Is it possible that they can login as another user using this cookie? Would they be able to decrypt it?
Security :: Authentication Cookie Expires Too Early?
Jul 6, 2010My users need to stay logged in for 1 day, so I used a persistent authentication cookie with an expiration of 1 day but it still times out after 20 minutes (which is the default timeout for the session, not the cookie).
This is my code:
<authentication mode="Forms">
<forms loginUrl="Login.aspx" protection="All" path="/" />
</authentication>
FormsAuthenticationTicket ticket =
new FormsAuthenticationTicket(1, "username", DateTime.Now, DateTime.Now.AddDays(1), true, "userdata");
string encTicket = FormsAuthentication.Encrypt(ticket);
HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encTicket);
cookie.Expires = ticket.Expiration;
HttpContext.Current.Response.Cookies.Add(cookie);
I also have manually-generated validation and decryption keys:
<machineKey>
validationKey="......."
decryptionKey="......."
validation="SHA1"
</machineKey>
Security :: Forms Authentication Is Not Updating The Cookie?
Dec 13, 2010We have had a bug recently where users are logging into an application with multiple browser tabs. They are editing a content page which means that they can be working on a page for sometime (ie with no postbacks) They finally click save and because the session has timed out it takes then to login page. I initally resolved they by adding a reminder that the session is about to expire which initally resolved the issue. It has been noted that even when they are within session time out they still got redirected to login page (and loosing the data on the form). We had real problems replicating the issue but have finally managed to do so now and I have learnt some curous features of .net Forms Authentication.
I have set up a test project which has the membership controls on etc. I have set the Timeout on the <forms> tag
<forms loginUrl="~/Account/Login.aspx" timeout="2" />Case 1I then open two browsers windows (side by side), both on the login page (and logged out)On the left window I login (and start a timer)after 40 seconds on the right window I navigate to a page (which takes me to the page as I have logged in on left window )I then wait until the full 2 minutes has elapsed (but before 2 Minutes and 40 seconds) and then try and navigate to a page on the left window.It redirects me to the login pageI would expect it to allow me to navigate to as I have kept my session open on the right window.Case 2I then open two browsers windows (side by side), both on the login page (and logged out)On the left window I login (and start a timer)after 90 seconds on the right window I navigate to a page (which takes me to the page as I have logged in on left window )I then wait until the full 2 minutes has elapsed (but before 2 Minutes and 40 seconds) and then try and navigate to a page on the left window.It Navigates to the page keeping me logged in.After a bit of reading around the subject I have found out that the slidingexpiration property only renews the cookie if it is in the last 50% of the timeout value:
Sliding expiration resets the expiration time for a valid authentication cookie if a request is made and more than half of the timeout interval has elapsed[URL]
My Question is: How can I override this bit of functionality?
Is there a property to set somewhere to "Always renew cookie"?
Is there another workaround. Unfortunately I can't increase the timeout because of a complience issue (it must be set to 15 minutes)
Security :: Set A Function That Executes When The Cookie Is Expired?
Apr 17, 2010how do i set a function that executes when the cookie is expired?i want this when the cookie expires:
application("loggedin") = application("loggedin") - 1
Security :: Retrieve UserName From Authentication Cookie
Feb 5, 2010Once the user has authenticated, I would like to base all of the information displayed to the user based on their username. Isn't that saved in the cookie?
For instance, I would like to pull all of their client information using a GridView and have the parameter set to the appropriate authentication information.
System.Security.Permissions.SecurityPermission Winform In Webform?
Nov 22, 2010It's a ?/$%/$%"!$ mess ... My webpage contains a winform user control. That user control send text to LPT1.It acts like an ActiveX. I set my website (on localmachine) as a trust one in IE and set all properties for ActiveX under security tab. The user control is showed under IE but I got a System.Security.Permissions.SecurityPermission when execute it.When I sign my control, IE can't display it ! I registered the dll in the .Net Framework Configuration tool
View 3 RepliesSecurity :: Trying To Create A Cookie For Storing Username And Password?
Sep 5, 2010I am trying to create a cookie for storing Username and Password.
This is so far I am :
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But I am getting error :
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Security :: Manually Check Form Authentication Cookie Value?
Feb 18, 2011My requirements is when one other website call my service (httphandler) and in response i will provide one parameter which is
value of form authentication cookie
now that website call my website with that cookie value as query string , how to check from that cookie value that particular use is authenticated or not ?
Security :: Session Varial Expire But Not The FormsAuthentication Cookie?
Feb 20, 2010I have a littel problem.
In my asp.net application iam using Form FormsAuthentication.... and also use a session var to save a userID..
The problem is that ´when my session espire, the Form cooki is not expired.
I want form cooki to expire, when session expires....how?
Do i have to do it in Session_end event..
How do the code look like?
Security :: How To Save Extra Information About The User In The Cookie
Mar 10, 2010I'm using the ASP.NET membership framework in my ASP.NET application. I'd like to save a few extra pieces of information in the cookie so that when I need it, I don't have to go back to the database. I want to save user's email address, full name and time zone.How do I save this information in the cookie?
View 1 RepliesSecurity :: Keep Authentication Cookie Between Http And Https On Two Different Domain?
Dec 6, 2010is it possible to preserve authentication for ASP.NET Forms authentication cookie,btween Http and Https (different domains) and back?I mean haveing single signon for two domains say http://www.mydomain.com and https://members.mydomain.comI've seen on quite asp.net sites that have a 'MyAccount' section they transfer the site to https and then when you have logged into your account successfully and gone back to the majority of the site you move back to http whilst still being logged in.
View 1 RepliesSecurity :: Membership, Transfer Login Session Into A Cookie?
Mar 22, 2010How can I transfer the login session of a user into a Cookie that would expire in 12 hours? I have a problem with Internet Explorer where whenever the user closes the window it would log them out automatically (which is by default what it is supposed to do). I am using VB.NET
View 4 RepliesSecurity :: Forms Authentication - Users Logged Out Before Cookie Expiration?
Jun 16, 2010For some reason my users are logged out of the system every 10-15 minutes or so...regardless of the configuration below....am I missing something?
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Security :: Finding Membership Authentication And ASPXAUTH Cookie Size
Oct 31, 2010Without reading the whole text below, since this is on the ASP.Net side ... basically I think I need to know if there is a way to reduce the size of the forms authentication cookie. When using a DotNet 2.0 website, the ASPXAUTH cookie is about 232 bytes ... when using the same source code but upgraded to DotNet 4.0. the cookie is approximately 264 bytes, setting the ticketCompatabilityMode does not reduce the size since I think the default setting is Framework20. I length of the cookie, including the its' name can not be larger than 256 bytes in order to use it with the "Client Application Services".
I only did a cursory search of the asp.net forums, but will dilligently look for an existing solution.
----- BACKGROUND AND RESEARCH -----
I have been using all three features of client application services (authentication, profiles, and roles) in my windows app (DotNet 3.5 framework) for almost two years now. Up until now, I have not had any problems. This week I hit a brick wall and am pretty stumped with two seperate but related issues.
Issues:
In development, we decided to upgrade our websites/services to DotNet 4.0. All applications upgraded successfully. However we are unable to log into our application using Client Application services. No matter what user we use, Membership.ValidateUser returns false. Since we know the username and passwords, we thought this was strange. When debugging the application, we found that Membership.ValidateUser was throwing an InvalidOperationException (see below for complete exception) stating that the ASPXAUTH property was too long, longer that the schema created in the SQL/CE database. (See below for things tried).
In production .. A user all of the sudden could no longer gain access to the application. Upon inspection, his ASPXAUTH cookie was 264 characters long (9 characters longer than the schemas nvarchar(256)). Even though the user was being authenticated on the "server side", and the JSON query returned "{"d":true}", Membership.ValidateUser returned false. Again, as in the case above, the actual error was ...
Message=@PropValue : String truncation: max=256, len=264 ...
I am assuming I am missing something very simple or that I overlooked a settings. In development, this is not a huge issue as I can release the Dotnet 4.0 websites when I am ready. But now that this has happened to a client on a production system, it is very worrisome.
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Security :: Load Balancer / How To Make Cookie As Secure In Site
Oct 28, 2010I have a doubt regarding secure cookie.
I have four servers 2 App Server(behind firewall) and 2 webservers and each server is accessing through Load Balancer.
App Server is a modules for Data Access layer and webserver is for Presentation layer.
My Issue is My Load Balancer has Secure certificate installed but certificate is not installed on servers and I want to make cookie as secure in site , as per my understanding " cookie should be set as secure only for SSL site other ways new session will get create every time" so should I install SSL certificate on webserver to make my cookie as secure or will it work properly even if only Load Balance has SSL.