flexlm and VENDOR_KEY5

Now the thing i do not understand fully, is VENDOR_KEY5 generated out of
key1-4 and vendor? or how can i find that? thanks

yes, it is derived from key1-4. Its function is used to hide the encode seeds1-2 before version 7.0. But it is now (after version 7.0) useless. The new role is replaced by a dynamic derived number from vendor name, timer, salt,...etc. That dynamic number once before stored inside somewhere of the job structure. Now it moves into an extended area but still inside the job structure. To recover that encode seeds1-2, norland's tutor is still the best up to now. Go to Crackz site to search for it.

Keys1-4 and vendor name are used to derived an original plain key in which stores the keys expired date, supported functions enabled, supported hw-dongles types, and the keys1-4 integrity checksum.

crokeys1-2(trlkeys1-2) are only used for enabling TRL options and the integrity checksum of itself. It has nothing to do with the SIGNx generation.