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Forums Using DNN Platform Administration and Configuration

Password hashing method, unclear how it works, trying to replicate

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Adam K Dean
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7/26/2024 2:33 AM

Hi all,

I'm working with a project that is using DNN v. 09.11.02 (0). As part of the project I need to be able to support the existing users by implementing in Node.js the same password hashing algorithm that is used by DNN. It is configured with a SqlMembershipProvider specifying hashed passwords, and in the machineKey tag it specifies SHA1.

I've done quite a bit of exploration, which you can see on my StackOverflow cross-post: https://stackoverflow.com...nt138924164_78793875

But essentially, when putting together the salt and the password, the hash I'm getting out is consistently different than what is stored.

I'm wondering if anyone here has any knowledge of why this may be — whether a different hashing method is used in this version of DNN, or whether something happens to the password before it is hashed?

Any and all suggestions & help would be greatly appreciated.

Kind regards

Adam

 

Michael Tobisch
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7/26/2024 4:41 AM

Not really sure about it, but here seems to be the login method...

Happy DNNing!
Michael

Michael Tobisch
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Adam K Dean
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7/26/2024 5:50 AM
Hi Michael

Thanks for getting back to me. I've had a look over that and other areas of DNN but can't work out what's different here. I can't see any changes to the password, e.g. pre-hashing, appending values etc, that would make DNN's use of ASP.NET's MembershipProvider different. But — I may have missed something.

It seems like a very niche issue, and I'm sure it's something simple, but somehow I think the passwords are being mutated before being stored.
Michael Tobisch
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7/29/2024 8:43 AM

Adam,

I never inspected these methods, but I would try to find the called function and analyze it from the source code. This would give you more information about it. But I am pretty sure it's quite straightforeward. Hopefully someone who has a deeper knowledge than me about this will answer soon...

Happy DNNing!
Michael

Michael Tobisch
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Will Strohl
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8/14/2024 7:37 PM

GitHub is down at the moment, but you may want to compare how you're doing your hashing to how DNN does it.  When GitHub comes back online, check out the <code>EncryptAES</code> method in the <code>DotNetNuke.Security.FIPSCompliant</code> class.  You may find yourself hashing it a bit differently. 

The other thing I'd triple-check and trace is whether you're using the exact same values as DNN.  

Daniel Valadas
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8/14/2024 11:04 PM
I don't think hashed passwords go through that method. I think it is just passed down to the asp.net provider. Don't quote me on it though I did not dig further on that.

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