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HomeHomeOur CommunityOur CommunityGeneral Discuss...General Discuss...DNN User Password SecurityDNN User Password Security
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3/25/2006 11:25 AM
 
Carlos Mendes

Joined: 7/20/2003
Posts: 44

Hi there,

can anyone explain me how are DNN passwords secured in the database?

What kind of mechanism is used?

Thanks
 
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3/25/2006 12:15 PM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676

The password storage format is determined by the web.config. During install we automatically generate unique keys to protect viewstate (the machinevalidationkey via SHA1) and passwords. The actual type of password storage is determined by the passwordFormat in the DNNSQLMembershipProvider e.g.

<add name="DNNSQLMembershipProvider" type="DotNetNuke.Security.Membership.DNNSQLMembershipProvider, DNNSQLMembershipProvider" connectionStringName="SiteSqlServer" enablePasswordRetrieval="true" enablePasswordReset="true" requiresQuestionAndAnswer="false" minRequiredPasswordLength="4" minRequiredNonalphanumericCharacters="0" requiresUniqueEmail="false" passwordFormat="Encrypted" applicationName="/" description="Stores and retrieves membership data from the local Microsoft SQL Server database" />

By default we use encryption, which utilises the machinevalidationkey generated during install. In addition a unique Salt value is used along with the password and the key, to make passwords even safer. You can select alternative values of clear (passwords are stored in cleatext) or hashed (passwords are hashed - this does mean that they're not retrievable) if you wish.

Cathal

 

Buy the new Professional DNN7: Open Source .NET CMS Platform book Amazon US
 
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2/5/2007 3:36 PM
 
Michael Kellogg

www.kelloggs.org
Joined: 12/13/2005
Posts: 2

I forgot a password and had to go reset it, so I just used QueryAnalyzer and ran the stored procedure aspnet_Membership_ResetPassword.  When I did this, I did not specify a value for the PasswordFormat parameter and it defaults to zero.  It turns out that the "0", which is stored in the "PasswordFormat" field of the aspnet_Membership table, indicates clear text, and that the new password I sent was simply stored in the clear.  That's pretty useful to know, and I see that the other passwords, which were set up by the app, indicate a Format of "2" and appear to be hashed, though it doesn't look like MD5.  After reading the previous post, should I understand they are actually encrypted, not hashed?  Can I get the different values for the PasswordFormat field and their meanings?  And is the "PasswordSalt" field not used when the Format is zero?  Is there a way to set these up in the GUI rather than through the back-end directly, as I have done?

Thx!
 
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5/7/2007 8:22 AM
 
zawmn83

Joined: 12/4/2006
Posts: 22

I want to create login users for many DNN instances from one main DNN instance.

At the main DNN instance, connection strings to other DNN databases and machine key are stored.
 
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1/23/2008 12:37 PM
 
miguel

Joined: 11/20/2007
Posts: 19

Hi, in my aplication for default, the password is encrypted but I want chance format for Not encrypted, What is the parameter for "  passwordFormat= " to change password encrypted to Not encrypted.

Thanks for your comments.
 
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HomeHomeOur CommunityOur CommunityGeneral Discuss...General Discuss...DNN User Password SecurityDNN User Password Security


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