WinRAR 2.50 algorithm

[teknixstuff]

Could you also figure out how to generate keys for the WinRAR 2.00 - 2.50 algorithm?

[bitcookies]

If you have a key file for winrar 2.x, could you share it? I'm going to look for the old installer to check it out first.

[teknixstuff]

If you have a key file for winrar 2.x, could you share it? I'm going to look for the old installer to check it out first.

Before WinRAR 2.60, a key file wasn't used. Instead, a more standard name and key system was used. Here is a key I found online:
Name: 01-registered, Key: C4BF18BBEB

[vavavr00m]

Here's the installer for 2.0. The uploader (funnily seems like the dev) also has a bunch of other old versions.

[bitcookies]

I tested winrar 2.00 and found that it calls bcryptprimitives.dll and bcrypt.dll and hits ProcessPrng and OptionalHeader.AddressOfEntryPoint respectively.

It is assumed that earlier versions of winrar used cryptographic algorithms or hash functions from the bcrypt library. bcrypt.BCryptHash+BD0 occurs frequently, and probably involves the SHA family of hash algorithms.

You can put breakpoints at the above two places and observe the changes in ECX and EDI.