How to decrypt .CMK and .SMK files

General Forum for talking area for E series TVs.

m0sia
Posts: 1
Joined: Tue Jul 15, 2014 10:15 am

Re: How to decrypt .CMK and .SMK files

Post by m0sia »

It looks like I am inventing the wheel. I had some fun reversing latest version of emulator's webkit yesterdays evening. Today I decided to google if someone did the same and found this forum. :) If someone also wants to know initial vector(IV) it is the second 16bytes of the secret key:
SpoilerShow
8534CEF9B055FC016824FC01177E4C79
agolbin
SamyGO Project Donor
Posts: 5
Joined: Fri Sep 09, 2022 9:20 am

Re: How to decrypt .CMK and .SMK files

Post by agolbin »

Hi guys.

I tried this for decrypting EMPlist.js.cmk with keys in the first post , and got this Warning and finally a bad decrypted file !!!


am I wrong? or the key is deprecated really?

Note that I'm very very nobe in openssl and don't know anything about it :roll:
SpoilerShow
***warning : deprecated key derivation used.
Using -iter or -pbkdf2 would be bettr.
Bad decryp
140221338146112:error:06065064:digital envelope routines: EVP_DecryptFinal_ex:bad decrypt:../crypto/evp/evp_ens.c:610:

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