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
I have searched and could not find any article related to "How to implement Certificate Security in production environment".
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.
How do I do this in Production. We have a domain certificate from GoDaddy which resides on the server. How do I create a Client Certificate off of that.
I am using a standard implementation of the membership provider. I however, need to compare a supplied password (from a textbox) with a saved encrypted password. This is for a new security policy at work.
For testing I used this:[URL]Encrypts only the password is not encrypted and username.Why not?For security reasons, I would like also to encrypts username.
for maintain security, i encrypted my password and store in database like following
Dim PWD As String = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text.Trim(), "SHA1").Trim()
but problem is suppose user forget his password and need to know then how can i decrypted the password and send to the user?is there any other suitable way to handle password?
reading on the web ive found the code below; i wonder if an encrypted string using this block generates an unique result or if different encrypted sources can result in the same crypted array:
private static TripleDES CreateDES(string password) { MD5 md5 = new MD5CryptoServiceProvider(); TripleDES des = new TripleDESCryptoServiceProvider(); des.Key = md5.ComputeHash(Encoding.Unicode.GetBytes(password)); des.IV = new byte[des.BlockSize / 8]; return des; }
So if i encrypt connectionstrings and sections, how will i get their values inside my code?I don't want to decrypt the web.config, i just want to read the encrypted values.There must be a class.Maybe something from ConfigurationManager?I don't suppose it's automatically decrypted?
I've taken over a website which has around 3000 users registered using the standard asp.net membership provider on a SQL database. When the website was set up there were a lot of gaps in the system and we have a lot of tidying up to do of users with the same email addresses etc and invalid addresses so i'm just starting to look at how i can wrap all of this up and make administering the user accounts easier.
At the moment the account passwords are stored in "Hashed" format set in the web.config and obviously this doesn't allow for password retrieval. I want to know whether there is a way of converting all of these passwords from a hashed format to an encrypted format thus allowing me to create a password recovery page that doesn't then send the user a new password which is quite often something like "a*ns7#<3lx"
Ideally i'd like to convert all of these if that is possible so that I do a much simpler password retrieval system. If this is not possible can you tell me how i go about setting the passwordreset value not to contain all sorts of non-alpha/numberic characters?
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?
For our website, we have decided we would like to maintain our user passwords as encrypted binary data in our database. We are using ASP.NET 3.5 to host our site and SQL Server Express 2008 for the database, both running on the same server. When a user logs in and submits a username and password, there will need to be some sort of encryption or decryption in order to verify the credentials. To me, it would appear that there are 3 ways to do this:
1)[C# Encyrption] On User creation, perform encryption in the Web App and submit the encrypted password to the database. To verify credentials at Login, perform the same encryption on the submitted password and ensure that it matches the value stored in the database.
2)[SQL Encryption] On User creation, submit the plain-text password to the database and have it perform one of the SQL encryption variants during INSERT. To verify credentials at Login, have the database perform decryption on the password during the SELECT statement, and compare the plain-text submitted password to the one in the database.
3)[Mix] On User creation, submit the plain-text password to the database, and have it perform one of the SQL encryption variants during INSERT. To verify credentials at Login, perform the same encryption algorithm used by SQL on the submitted password ( is this possible? ), and ensure that it matches the value stored in the database.
Does anybody have an opinion as to which of these options is best? Number 1) is the most familiar to me, and would be the easiest to use with LINQ to SQL ( which is our current data model ), so I am leaning towards that. But if there are better options I would love to know about them.
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 ....
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.
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.
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. "www.asp.net" 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 ASP.net???? - 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?
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.
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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.
<br/>I'm at the point where I am writing the SSLStream, but there is a major roadblock. I don't know how to programmatically locate my X509Certificate so that I can authenticate the SSLStream. To make this problem a little more challenging, I am working with a somewhat-unpopular shared hosting provider, who does not give me access to the certificate name - which probably is not a big deal. I am guessing I'm just going about this problem the wrong way. <br/>
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
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
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:
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?
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? Is there any risk involved with the installation of SSL certificate that might bring down the applications hosted on the IIS.Will the application hosted on that IIS continue working with HTTP?(I don't want each application to be https enabled.
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
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".http://learn.iis.net/page.aspx/478/configuring-one-to-one-client-certificate-mappings/I 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(Request.ServerVariables["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.
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.
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 ?
