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v0.25.9: built-in AACS keys + plugin slot + MKB record-type fix

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Two changes that make AACS 1.0 / DVD self-sufficient:

1. MKB record-type identification bug fix. `mkb_find_mk_dv` was
   searching for type 0x10 (which is Type-and-Version, 12 bytes)
   when the Verify Media Key Record is actually type 0x81 for
   AACS 1.0 or type 0x86 for AACS 2.0/2.1. `mkb_version` had the
   inverse bug. PK and DK derivation paths therefore silently
   failed on every disc, masking how often the fallback paths
   could have worked. Fix searches the correct types; tests added
   covering both the 0x81 and 0x86 verify-record forms and the
   0x10 version record at offset 8 of the body.

2. Built-in AACS keys + operator plugin slot. Four device keys
   (covering MKB v01-v82+) and three processing keys (covering
   v63-v68) compiled directly into the library. Combined with the
   31 CSS player keys already in css/auth.rs, DVDs and Blu-rays
   (AACS 1.0) now decrypt with zero external files. New plugin
   path at ~/.config/freemkv/local_keys.cfg (same syntax as
   keydb.cfg) layered additively on top of built-ins and main
   keydb. `Disc::scan` no longer errors when keydb.cfg is absent;
   AACS 2.0 / UHD still surfaces a specific error when the disc
   needs keys none of the layers provide.

Public docstrings in project docs + README updated to describe the
three additive layers (built-ins → keydb.cfg → local_keys.cfg).
This commit is contained in:
MattJackson
2026-05-20 09:00:32 -07:00
parent d7b5c30f5d
commit e635c9556f
10 changed files with 570 additions and 73 deletions
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README.md
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@@ -6,6 +6,8 @@
Rust library for 4K UHD / Blu-ray / DVD optical drives. Drive access, disc scanning, stream labels, AACS decryption, CSS decryption, KEYDB updates, and content reading in one crate. Bundled drive profiles — no external files needed.
Built-in keys cover DVDs and Blu-rays (AACS 1.0). For UHD (AACS 2.0 / 2.1) discs, an optional `keydb.cfg` supplies disc-specific volume unique keys.
**12+ MB/s** sustained read speeds on BD. Full init: unlock, firmware upload, speed calibration — all from pure Rust.
Multi-lingual by design — the library outputs structured data and numeric error codes, never English text. Build any UI or localization on top.
@@ -121,7 +123,13 @@ loop {
Streams implement `FrameSource` (read) and/or `FrameSink` (write); direction is type-checked. `input()` / `output()` resolve URL strings to PES stream instances. All URLs use the `scheme://path` format — bare paths are rejected.
AACS decryption requires a KEYDB.cfg file. If available at `~/.config/aacs/KEYDB.cfg` or passed via `ScanOptions`, the library handles everything — handshake, key derivation, and per-sector decryption — without the application needing to know anything about encryption.
### Keys
DVDs (CSS) and Blu-rays (AACS 1.0) decrypt out of the box using bundled material — public AACS keys covering MKB version ranges are compiled into the library.
UHD discs (AACS 2.0 / 2.1) use per-disc volume unique keys, so they need a `keydb.cfg`. If one is available at `~/.config/freemkv/keydb.cfg` (or passed via `ScanOptions`), libfreemkv handles handshake, key resolution, and per-sector decryption transparently.
Operators with additional device keys, processing keys, or VUKs they have derived themselves can drop them into `~/.config/freemkv/local_keys.cfg`. This file uses the same syntax as `keydb.cfg` and is loaded on top of the built-in keys and any main `keydb.cfg` — entries are additive.
## Architecture