Bjørn Mork <bj...@mork.no> writes: > Wrt the implementation: Any protocol depending on closed binaries is > broken by design, without exception. It doesn't matter whether you use > a "secret" algorithm or just store keys inside the binary. Anything that > was compiled can be decompiled. Sure it can be obfuscated to make that > harder. We all love a challenge :-)
And just let me prove that fact without even modifying one byte of the code: root@miraculix:/tmp# cat /sys/class/dmi/id/product_family ThinkPad X1 Carbon 4th root@miraculix:/tmp# echo ThinkEdge > /tmp/product_family root@miraculix:/tmp# mount --bind /tmp/product_family /sys/class/dmi/id/product_family root@miraculix:/tmp# cat /sys/class/dmi/id/product_family ThinkEdge And what do you think? There goes the machine check.... May 1 18:24:59 miraculix DPR_Fcc_unlock_service: main(): FCC unlock app started May 1 18:24:59 miraculix DPR_Fcc_unlock_service: get_product(): DT May 1 18:24:59 miraculix DPR_Fcc_unlock_service: MACHINE = [4] --- THINKEDGE_SE30 = [4] May 1 18:24:59 miraculix DPR_Fcc_unlock_service: main(): FCC unlock app exited This doesn't work for me of course, only having the original EM7455 modem. But I do note that the log output changed from -1 to 4, whatever that means. Previously: May 1 18:21:01 miraculix DPR_Fcc_unlock_service: MACHINE = [-1] --- THINKEDGE_SE30 = [4] Something to try out on your X1E4, maybe? Bjørn
