Backup decryption not working

[mrishi]

• I was able to download backup key using the method mentioned here: https://github.com/JFC-Group/JF-Customisation/blob/master/Instructions/Get-Any-File-From-JF-ONT-Home-Gateway.md

• However, using the command: $ openssl aes-128-cbc -d -pass file: -in -out

But it gives this error: *** WARNING : deprecated key derivation used. Using -iter or -pbkdf2 would be better. bad decrypt 009EDFFF01000000:error:1C800064:Provider routines:ossl_cipher_unpadblock:bad decrypt:providers/implementations/ciphers/ciphercommon_block.c:124:

• I tried adding "-pbkdf2 -iter 100000" to options which did produce an output without an error, but it does not look like text.

Pls. help..

[itsyourap]

The encryption keys have changed since then. Use https://github.com/JFC-Group/JF-Customisation/blob/master/keyguesser.py

[mrishi]

Thanks but same result. Btw, I am on firmware 2.29 on JCOW404 model.

Also, I noticed that the key dumped by old method was in the format: \<Router Serial>\<DefaultSSID Suffix>\<some hex-key>, which seems to be as per the permutations you are generating in keyguesser.py.

So, I tried to add the hex-key part of the key to your keys list in keyguesser.py, so that it could be used in the generated permutations, but that didn't help either.

[itsyourap]

Since, we are not able to identify the issue here, we are closing this issue