43 lines
1.6 KiB
Text
43 lines
1.6 KiB
Text
|
╔═════════════════════╗
|
||
|
|
SEGA Decryption Guide
|
||
|
|
╚═════════════════════╝
|
||
|
|
|
||
|
|
╭─────────╮
|
||
|
|
app files
|
||
|
|
╰─────────╯
|
||
|
|
|
||
|
|
1. create a new file titled <PCB CODE>.bin
|
||
|
|
|
||
|
|
2. fill in the first 16 bytes of <PCB CODE>.bin with
|
||
|
|
the AES key. (e.g. 9D 0B BA 20 D1 E8 4F 24 59 39 9F 53 83 BE EE 72)
|
||
|
|
|
||
|
|
3. the next 16 bytes will be the NTFS header (EB 52 90 4E 54 46 53 20 20 20 20 00 10 01 00 00)
|
||
|
|
the NTFS header is always the same
|
||
|
|
|
||
|
|
4. save this file, then decrypt the app files with the following command:
|
||
|
|
fsdecrypt <PCB CODE>.bin 0x200000 <path/to/app> <out.vhd>
|
||
|
|
|
||
|
|
5. once it finishes decrypting, run the calculate_iv.py script
|
||
|
|
save the output of key 1. script is found here: https://discord.com/channels/162861213309599744/243895668790394882/995170669329391706
|
||
|
|
|
||
|
|
6. open <PCB CODE>.bin inside the hex editor once more, replace the NTFS header with
|
||
|
|
the key 1
|
||
|
|
|
||
|
|
7. run "fsdecrypt <PCB CODE>.bin 0x200000 <path/to/app> <out.vhd>" once more
|
||
|
|
|
||
|
|
8. your app is now decrypted, you can extract the internal_0 with poweriso or any other tool
|
||
|
|
|
||
|
|
╭─────────╮
|
||
|
|
opt files
|
||
|
|
╰─────────╯
|
||
|
|
|
||
|
|
1. decrypt the opt file using fstools with the following command:
|
||
|
|
fstool dec OPT.bin in.opt out.vhd
|
||
|
|
|
||
|
|
2. run the calculate_iv.py script and save key 3
|
||
|
|
script is found here: https://discord.com/channels/162861213309599744/243895668790394882/995170669329391706
|
||
|
|
|
||
|
|
3. replace the IV key of the OPT.bin with key 3, the IV key of OPT.bin are the second 16 bytes
|
||
|
|
|
||
|
|
4. decrypt the opt file once more with the new key
|