[Reversing Mavic Pro Firmware]

3 hours ago, Freaky123 said:

You can't modify the sig files, because they are signed by an RSA key. Hence the sig extension, for signature.

On the device this signature is checked and thus makes this a useless bug except for downgrading further.

I feared so, sorry for my ignorance and thanks for your Explanation !

Greetings,

 

Ender

[Reversing Mavic Pro Firmware]

Oops, forgot: The example of the guy mixing fw files show that al teast on that version of DJI Assitant tjere seems not to be an additional md5 check before starting to upload...

 

Ender

[Reversing Mavic Pro Firmware]

Hi, Question:

There is a way of interrupting the FW update process of DJI Assistant so you have the chance of accessing / modifying the "unpacked" seperate FW files contained in the one big archive.

The idea is to run your mavic below 50% battery so DJI Assistant will pause and notify you to charge your Mavic and retry.

AT that time you can access & mod the files (in firm_cache directory)

This is dicussed starting here, with a guy managed to replce files with the one from another FW basically ending up with a mixed situation, lol:

http://mavicpilots.com/threads/i-created-a-vm-so-we-can-all-forever-downgrade-to-400.16619/page-7#post-199036

 

So if we reach that point, would someone be able to decrypt, modify and encrypt FW files again ?

Would that be a way of modding the desired parameters or at least tochange the behaviour to allow ADB root access ?

Or am i completely on the wrong path here ?

 

:-)

 

Ender

 

[Reversing Mavic Pro Firmware]

Oh Lordy, mine will arive in a wekk.

Ender <---- needs root.

(In case of the Mavic to allow FCC instead of CE WiFi power)

 

Greetings