User crypt filters.

I was asked through email how to deal with this.

Solving this issue is very dependent on the version of FLEXlm that is used
to generate the crypt filters. Later version (7.1, 7.2) are much more secure,
but they can still be cracked, however a true inverse algorithm of the
one encountered in the user crypt filter in the daemon must be created.

A more automated approach to cracking may be required here - perhaps
rip the filter algorithm with IDA, recompile with TASM and brute force
out the permutation/xor tables.

Knowing what the target is might be helpful.

HI Nolan

I have few more doubts regarding the daemon stuff

1) If my seeds are wrong then why is it that, some versions of the tools are able to check out license ?

2) Does seeds play any role when it come to checking out the license ?

thanks
roZes

Hmm - it's possible I've made an error somewhere.

When I get to the machine I used to crack that daemon
I'll check it out more thoroughly.

--nb.

Nolan

Please let me know your finding, once you get there.


thanks
roZes