Decryption fails?

[user8547]

Using latest source code as of 2024-01-05, it is not possible to unzip the downloaded and decrypted firmware:

$ ./TheAirBlow.Syndical.Application -m DownloadDecrypt -v G970FXXSGHWC1/G970FOXMGHWA3/G970FXXSGHWB3 -M SM-G970F -r SEB -I RF8M81TZ4VB -f
Device: SM-G970F/SEB
Firmware: G970FXXSGHWC1/G970FOXMGHWA3/G970FXXSGHWB3/G970FXXSGHWC1
Connecting to FUS server...
Verifying firmware version...
Fetching firmware information...
Initializing download...
Destination: SM-G970F_5_20230303113410_3xhglg47s4_fac.zip
WANRING: No hash check will be performed.
Firmware download & decryption done!                                                                                   

Downloading & Decrypting firmware ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 5.9 GB 43.2 MB/s 00:00:00 00:03:42     

$ unzip SM-G970F_5_20230303113410_3xhglg47s4_fac.zip
Archive:  SM-G970F_5_20230303113410_3xhglg47s4_fac.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of SM-G970F_5_20230303113410_3xhglg47s4_fac.zip or
        SM-G970F_5_20230303113410_3xhglg47s4_fac.zip.zip, and cannot find SM-G970F_5_20230303113410_3xhglg47s4_fac.zip.ZIP, period.

[user8547]

$ md5sum SM-G970F_5_20230303113410_3xhglg47s4_fac.zip
c4b1969e8b18e89369e2c4985ade54b3  SM-G970F_5_20230303113410_3xhglg47s4_fac.zip

[TheRealMrWicked]

Hey so I am not sure if the problem is with the decryption of the file, but it appears that the header of the zip file has an error in it.

I usually extract these files using 7-Zip on windows and the program has not issue with extracting it, however on Linux using the most common programs (unzip, tar, 7z) all fail to extract it.

But I have found a solution to the issue, you need to fix the archive using the zip program.

Firstly download the program from your repo using the respective package manager:

sudo apt install zip or sudo pacman install zip

Then run the fix command (this may take up to 10 minutes):

zip -FF inputarchive --out outputarchive

Example Usage:

zip -FF SM-G970F_5_20230303113410_3xhglg47s4_fac.zip --out Firmware.zip

Then you can decompress the newly created archive as usual using unzip:

unzip Firmware.zip

Hope this helps you solve the problem.

[TheAirBlow]

$ md5sum SM-G970F_5_20230303113410_3xhglg47s4_fac.zip
c4b1969e8b18e89369e2c4985ade54b3  SM-G970F_5_20230303113410_3xhglg47s4_fac.zip

Check if you get the same corrupted zip when using Bifrost.

This project is basically in maintenance only for now (two new libraries soon), so I'm piggybanking off them.

[user8547]

Bitfrost after decryption produced a different zip file which unzips fine:

$ md5sum SM-G970F_5_20230303113410_3xhglg47s4_fac_G970FXXSGHWC1_G970FOXMGHWA3_G970FXXSGHWB3_G970FXXSGHWC1_SEB.zip
abe8b002c6394eefd9d2fab4927e5983  SM-G970F_5_20230303113410_3xhglg47s4_fac_G970FXXSGHWC1_G970FOXMGHWA3_G970FXXSGHWB3_G970FXXSGHWC1_SEB.zip

$ unzip SM-G970F_5_20230303113410_3xhglg47s4_fac_G970FXXSGHWC1_G970FOXMGHWA3_G970FXXSGHWB3_G970FXXSGHWC1_SEB.zip 
Archive:  SM-G970F_5_20230303113410_3xhglg47s4_fac_G970FXXSGHWC1_G970FOXMGHWA3_G970FXXSGHWB3_G970FXXSGHWC1_SEB.zip
  inflating: BL_G970FXXSGHWC1_CL25257816_QB62768393_REV01_user_low_ship.tar.md5  
  inflating: AP_G970FXXSGHWC1_CL25257816_QB62768393_REV01_user_low_ship_meta_OS12.tar.md5

TheRealMrWicked: Thank you for looking into it! zip -FF was not able to fix the zip file, but you are correct that 7z on windows is able to decompress that corrupted zip just fine!