SAP R/3 password encryption ?

[Petr.Kazil () eap nl]

One of our customers with access to a SAP system found a query that lists 
password changes.
It shows both the old and new passwords in encrypted format. He was 
wondering if these password hashes might be crackable. I'm no SAP 
specialist and if you don't have a SAP account it's hard to get any 
documentation.

But to me it looks like a password hash that might be vulnerable to a 
dictionary attack. But I don't know whether SAP uses something common 
(like SHA) or a proprietary algorithm. The password dumps look like this:

Old value:         New value:
|D624B6DF0C787DBC||21621AFB43G9726F| (I changed some values.)
|0000000000000000||75ADC566FA921A4A|

Does anyone have more information about the encrytion algorithm? I tried 
to get the information from SAP specialists who gave a course to my 
colleagues, but they didn't know either.

Greetings, Petr Kazil

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