[PATCH v2 firmware-utils] add dlink-sge-image for D-Link devices by SGE

[Paul Spooren]

> On Nov 2, 2023, at 20:16, Sebastian Schaper <openwrt at sebastianschaper.net> wrote:
> 
> This tool will encrypt/decrypt factory images requiring the "SHRS" header
> e.g. COVR-C1200, COVR-P2500, COVR-X1860, DIR-878, DIR-882, ...
> 
> Encryption is loosely based on a series of blogposts by ricksanchez [1]
> and the provided code [2], as well as patches to qca-uboot found in the
> GPL tarball released for D-Link COVR-P2500 Rev. A1 [3].
> 
> Further scripts (e.g. /lib/upgrade/) and keys were found in the GPL tarball
> and/or rootfs of COVR-C1200 (the devices are based on OpenWrt Chaos Calmer
> and failsafe can be entered by pressing 'f' on the serial console during
> boot, allowing to access the file system of the running device).
> 
> For newer devices like COVR-X1860 and DIR-X3260, an updated method of
> vendor key derivation is implemented based on enk.txt from the GPL release.
> 
> [1] https://0x00sec.org/t/breaking-the-d-link-dir3060-firmware-encryption-recon-part-1/21943
> [2] https://github.com/0xricksanchez/dlink-decrypt
> [3] https://tsd.dlink.com.tw/GPL.asp
> 
> Signed-off-by: Sebastian Schaper <openwrt at sebastianschaper.net>
> Tested-By: Alan Luck <luckyhome2008 at gmail.com>
> ---
> 
> Changes from v1:
> - improve formatting, replace raw strings with individual newlines to
>  fix build on macOS using clang

Tested and merged, thank you! Works as expected.

A PR for the bump of firmware-utils is here:
https://github.com/openwrt/openwrt/pull/13861

I’d be happy if you could create a PR for the device itself, I already got it running and it appears to work just fine.

Best,
Paul