sddl_dec theubusu

Use this command to install sddl_dec:

winget install --id=theubusu.sddl_dec -e

sddl_dec is a tool designed to decrypt and unpack Panasonic TV SDDL.SEC update files.

Key Features:

Rewritten in Rust for improved performance, up to 25x faster than previous versions.
Supports extraction of SDDL.SEC files from Panasonic TVs released in 2011 and later.
Extracts various file types including SDIT.FDI, PEAKS.FXX, STM.F00, and more.
Includes options for verbose mode and retaining TXT files during extraction.

Audience & Benefit: Ideal for firmware developers, reverse engineers, and Panasonic TV enthusiasts seeking to inspect or modify firmware updates. This tool provides a straightforward way to decrypt and unpack SDDL.SEC files, enabling deeper insight into their structure and contents. It can be installed via winget for ease of use.

sddl_dec

Tool for decrypting Panasonic TV SDDL.SEC files.
This tool will decrypt and unpack the files from an SDDL.SEC firmware update package used on Panasonic TVs.
Notice: The tool will not directly extract the contents of the firmware by itself! It only unpacks and decrypts the SDDL.SEC file. To inspect the output of the program, use a tool like binwalk. To see what you can expect, read more below.

Support

The tool can extract SDDL.SEC files from TVs released in and after 2011. Older files seem to use a different format.

Installation

Build from source, by downloading the code and running cargo build --release. The binary will be saved in target/release.

If you prefer to use the old python version, you can find it in the python branch (Please note that it is now very outdated, and no support will be provided).

Usage

sddl_dec [OPTIONS] [OUTPUT_FOLDER]
- The SDDL.SEC file to extract. - Folder to save extracted files to. If not provided, will use _
[OPTIONS] - Can be:
-v - Verbose mode - Print more detailed information about the file
-s - Save .TXT and TDI files (read more below)
-h - Show help message.

About SDDL.SEC and the output of the program

An SDDL.SEC file is an encrypted, ciphered and partially compressed archive that contains the firmware data for the TV. The main contents of the file can consist of:

SDIT.FDI - Probably stands for some combination of "Software Download Information Table" - it contains information about the modules contained within the file, their versions and respective models. It is not saved by default, but you can keep it with the -s option.
A bunch of XXX.TXT files, each one respective to one group in the SDIT. They usually contain information about the target of the update. By default, they are not saved and will be only printed to output, but with the -s option they will be saved.
PEAKS module - this is the main firmware data split into chunks, usually of 2/4MB of size - it is saved into a PEAKS.bin file, or in case of 2014-2018 files, the files embedded inside will be saved into a PEAKS folder. The content of the PEAKS module varies depending on the TV's platform, from my findings the structure is:
- For FreeBSD-based 2011-2013 models, and some later lower-end models: Read about the format and further instructions here
- For FreeBSD-based 2014-~2018? models - the output are 2 files in a PEAKS folder: "root.tgz" containing the rootfs filesystem, and a "DLDATA_LIST.TXT" file which specifies the partition it should be installed to.
- For Linux-based 2019+ models - the output blob contains a bootloader, DTB and rootfs squashfs filesystem (binwalk)
There can also be additional modules, such as BOOT, PEAKSBT, STM, DTB - these are either the TV's bootloader or some other firmware.

License

Licensed under GNU GPL v3.