you can extract the fw, open it with FWtoolbox and check the KEY if it is FFFF.. ,the guy who sold it to you overwrote the key and unless he has a copy of original FW, nothing to be done.
last thing to check is open the fw with an HEX editor
taken from a document by caster (i need to find the url): starting at position 4000 you can find the key after the following
Your screen should look like it does above. Notice the repeating
pattern, 01 11 11 11 11, then 16 bytes of FF, then 02 EE EE EE
EE, then 3 bytes BB, 13 bytes of FF, then 03 11 11 11 11, then
16 bytes of FF. After the four bytes of 11 or EE is a potential
key location. After your key is listed, it will be followed by
FFs until offset $5FFF. This is very important if your
firmware varies from the above you must put it after the last
basically if there is only FF after the last series of 4 pair of 1 or E, then there is no key in that firmware.
hope it helps, but feel there is simply no key in it
Edited by sosotiit, 06 July 2007 - 04:46 PM.