How do I customise the DS-KH6320-WTE1 firmware?

[antondanielvv]

DS-KH6320-WTE1 is a linux-based indoor station. I want to change the video display timer constraints (currently 60 seconds).

hikpack version 2.5 can unpack it but after repacking it the firmware installation fails.

$ ./hikpack -t k41 -x digicap.dav -o contents
Magic   : 484b5753
hdr_crc : 00001d1e (OK)
lang_id : 00000001
date_hex: 00000000
devclass: 000003f2
File: cramfs.img, CRC OK
WARN: missing new_20.bin trailer file
Extra tail at the end of dav, 72 bytes, maybe firmware id?

$ ls contents
cramfs.img  dav_extra_tail  dav_header

I can then unpack the cramfs file with 7z and edit some files and then recreate it with mkfs.cramfs.

And finally recreate the firmware file:

$ ./hikpack -D 20220711 -V 0x02010047 -t k51 -p digicapCustom.dav -o contents
File: cramfs.img, CRC OK
File: new_10.bin, CRC OK
Magic   : 484b5753
hdr_crc : 00001f2e (OK)
lang_id : 00000001
date_hex: 20220711
devclass: 0000003d
=== Tail record:
File: new_20.bin, CRC OK
=== Appending extra_tail, 72 bytes

Unpacking that again reveals a new file: new_20.bin

$ ls contentsCustom
cramfs.img  dav_extra_tail  dav_header  new_20.bin

What are some things I can try?

 

[trempa92]

Its encrypted. You can unpack , extract, zip and pack and you will notice its wastly different. When you do new cramfs, you need to copy header from old cramfs thats your best bet.


in order to copy headers use HEX editor , compare 2 files and you will notice the header is different, copy from 1 to other. Then also check the footer. Try to make it the samesize as it was.

 

[antondanielvv]

Thank you for the reply! How can I accomplish making it the same size? How do I know where the header stops and the content starts?