CODEWITHSUNDEEP
windows-phone-7password-storage
GeekPeek
GeekPeek

Reputation: 1767

Is there a standard to store username and password in WP7 applications?

I would like to ask if there is a standard to store username and password in a Windows Phone application. I am working on a project that validates the user on every request that is called. So, I want to store the username and password. Maybe even give them the possibility to "remember me", so if there isn't a standard for doing that, I will have to write it myself, but I'm guessing that Microsoft has a build-in one.

Upvotes: 18

Views: 2676

Answers (2)

Preet Sangha
Preet Sangha

Reputation: 65476

Use ProtectedData. I found this example on Kevin D. Wolf's efficientcoder.net :

   public static String Password {
        get {
            if (IsolatedStorageSettings.ApplicationSettings.Contains(STR_PASSWORÐ)) {
                var bytes = IsolatedstorageSettings.Applicationsettings[STR_PASSwORÐ] as byte[];
                var unEncrypteBytes = ProtectedData.Unprotect(bytes, null);
                return Encoding.UTF8.GetString(unEncrypteBytes, 0, unEncrypteBytes.Length);
            } else {
                return string.Empty; 
            }
        }
        set {
            var encryptedBytes = ProtectedData.Protect(Encoding.UTF8.GetBytes(value), null);
            IsolatedStorageSettings.ApplicationSettings[STR_PASSWORÐ] = encryptedBytes;
        }
   }

(Apologies for the cut and paste I had to use a text from image scan)

Upvotes: 20

Maxim V. Pavlov
Maxim V. Pavlov

Reputation: 10509

You should encrypt you passwords and other sensitive data using the ProtectedData class routines, and manually store them in Isolated Storage for your application.

To encrypt enter image description here

To decrypt enter image description here

Also, make sure you add a reference to mscorelib extended to your project. I had to learn this the hard way.

A good article on the topic is: http://debugmode.net/2011/10/16/protecting-password-or-any-data-in-windows-phone-7-using-data-protection-api/

Upvotes: 6

Related Questions