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Unsupported Encryption Algorithm on RC 1024

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Hi all,

My CEO got an OS failure on his laptop (Windows doesn't load anymore), the drive is healthy.

I need to backup all his data, I don't care about fixing the problem, since I already provided a new laptop, so I can decrypt or just mount & browse the drive.

We are a business unit of a large corporation, but we have a "stand-alone" SafeBoot 5.2 installation, so I'M the IT 

My conditions are this:

Defective Windows installation that doesn't load (BSOD after BMLoad.sys driver loading, also in safe mode). Safeboot login and password authentication works normally at boot.

Safeboot version : 5.2.4

Encryption: RC5 1024 - 12 rounds

I tried SafeTech BartPE plugin, with the correct SbAlg (got from Safeboot 5.2.0 installation CD), but when I try to load the SDB file I get a "Unsupported Encryption Algorithm".

The same happens also if I try to auth from SBFS (with a valid login)

So now I'm stuck on this.

Some suggestion?

I just want to browse this drive and get documents off it

Thank you all

1 Solution

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Re: Unsupported Encryption Algorithm on RC 1024

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I think you are using wrong BARTPE CD...

did you created Bart PE cd ? or you got from some1 ?

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8 Replies
Highlighted

Re: Unsupported Encryption Algorithm on RC 1024

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I think you are using wrong BARTPE CD...

did you created Bart PE cd ? or you got from some1 ?

View solution in original post

Re: Unsupported Encryption Algorithm on RC 1024

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Yes, I'm using BartPE provided by our Corporate IT, built for AES Encryption..

I loaded it on USB stick, and I just deleted the two SbAlg.sys and dll files, putting then my RC5 files..

When I open SafeTech app, I can choose the correct alg on the option menu, so the program saw it.

is that wrong?

Should I do something different?

Where to get another version of BartPE?

Thanks for fast answer!

Re: Unsupported Encryption Algorithm on RC 1024

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yeah.. I did it.

This time, I created by myself with the pe plugin provided on the original setup that we have.

I just changed the provided AES with the RC5 alg files..

No problem at all

Thanks!

Reliable Contributor SafeBoot
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Message 5 of 9

Re: Unsupported Encryption Algorithm on RC 1024

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so, problem solved?

Re: Unsupported Encryption Algorithm on RC 1024

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Yes,

Problem solved.

So, I would suggest to other users:

Putting different SbAlg files on an already created BartPE USB stick MAY NOT work.

You have to do it before building BartPE

Reliable Contributor SafeBoot
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Message 7 of 9

Re: Unsupported Encryption Algorithm on RC 1024

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I am guessing you missed out replacing one of the files - maybe sbalg.sys in the system32/drivers directory? Good advice though.

Re: Unsupported Encryption Algorithm on RC 1024

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I tried this way:

Used BartPE built on AES 256 for USB stick from our Global Corporate IT

Once BartPE OS loaded, I changed SbAlg.sys and SbAlg.dll (and .vxd too) with the one took from my installation source, on %Drive%\Programs\Safeboot\SbAlg

When I was opening SafeTech, on "Algorithm - Select Alg"  I was able to view the RC5 1024 encryption..

Once opened the SDB, or the SBFS, it showed me a popup with the computer name that I was trying to restore, once pressed OK I got the "on-topic" error.

I also changed the SafeTech executable with the one from my installation CD.. same happened.

So i rebuilt BarPE with the same files, and no more worries.

Reliable Contributor SafeBoot
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Message 9 of 9

Re: Unsupported Encryption Algorithm on RC 1024

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yes, you can't do that - drivers are loaded into memory when the OS starts, so overwriting them afterwards doesnt do anything - the running copy is still the original one.

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