/tech/ - Technology★

>purchasing drm disks in the first place

>>911936 (OP)

Yes but why go through all that effort when you can just use dd? Or use VLC's newer unsrambler library for blu rays.

>>911955

as far as i can tell the drive itself is involved in the decryption process. i don't think you can just dd a blu-ray

AACS decryption process
The AACS decryption process for a protected disc by a licensed player goes through four stages:

1. The software/embedded player's Device Keys, together with the disc's Media Key Block (MKB) data are used to retrieve a "Processing Key", and with that (plus another datum from the MKB) to compute the Media Key.
2. That Media Key, together with the disc's Volume ID (VID) obtained by the player presenting a valid Host Certificate to the drive is used to compute the Volume Unique Key (VUK).
3. This VUK is used to unscramble the disc's scrambled Title Keys.
4. Finally those Title Keys unscramble the disc's protected media content.

blu-ray is total botnet, do not purchase blu-rays in the first place, ever.

>>911959

https://wiki.archlinux.org/index.php/Blu-ray

me@localhost:~$ dd if=/dev/sr0 of=~/1.iso
92721664+0 records in
92721664+0 records out
47473491968 bytes (47 GB, 44 GiB) copied, 1844.79 s, 25.7 MB/s

me@localhost:~$ dd if=/dev/cdrom bs=1 count=47473491968 | md5sum
47473491968+0 records in
47473491968+0 records out
47473491968 bytes (47 GB, 44 GiB) copied, 44400.2 s, 1.1 MB/s
7a91269fd8608e5de1fa3807e7914d2f  -

me@localhost:~$ md5sum '/home/me/1.iso'
7a91269fd8608e5de1fa3807e7914d2f  /home/me/1.iso

dd produces a byte for byte copy of the disk.

>>912245

Handbrake and VLC do not handle obfuscated Blu-Rays very well either. You need Oracle Java (OpenJDK doesn't work for some reason) and MakeMKV to find the right title to rip.

>>911936 (OP)

just record the screen lol