7870pwd_extract is utility to extract password from vendor specific portion(file AllAppUpdateA13.bin) of FYT UIS 7870 firmware.

1. Build.

1.1 Pre-requisites:

• Linux 64bit (tested on WSL2 instance of Ubuntu 22.04)
• gcc/g++ 11 or higher (tested with 11)
• gnu make
• openssl (tested with openssl3) + openssl dev package (sudo apt install libssl-dev)
• minizip (sudo apt install libminizip-dev)

Also includes ed25519 implementation from https://github.com/orlp/ed25519/tree/master

1.2 Build

    cd 7870pwd_extract
    make

2. Usage.

2.1 Run utility.

7870pwd_extract -z <path_to_AllAppUpdateA13.bin> -l <path_to_lsec6318update> [-v]

Where -v is optional parameter which enables verbose mode

Example:

./7870pwd_extract -z /mnt/d/tmp/7870_2000x1200_20240111_LiJun/AllAppUpdateA13.bin -l /mnt/d/tmp/7870_2000x1200_20240111_LiJun/lsec6318update
password: b8eb271f597885f48b8d237259aa72d0

2.2 Test that password good with your favorite archiver.

Example:

7z t /mnt/d/tmp/7870_2000x1200_20240111_LiJun/AllAppUpdateA13.bin -p b8eb271f597885f48b8d237259aa72d0
Scanning the drive for archives:
1 file, 641257863 bytes (612 MiB)

Testing archive: /mnt/d/tmp/7870_2000x1200_20240111_LiJun/AllAppUpdateA13.bin
--
Path = /mnt/d/tmp/7870_2000x1200_20240111_LiJun/AllAppUpdateA13.bin
Type = zip
Physical Size = 641257863
Comment = |c\'Ë+¹EÞxÌÅò´òÀ?»wØ+´=wÐ'

No files to process
Everything is Ok

Files: 0
Size:       0
Compressed: 641257863