Matthew Jackson e107c699d1 firmware: retire Ake+Bus into one Encryption lever (fw 0.9.0 ABI)
Firmware 0.9.0 consolidates the Ake (0x06) and Bus (0x07) features into a
single Encryption (0x06) lever; wire id 0x07 no longer exists. The separate
Bus lever was proven inert on BU40N/MT1959 — the one Encryption lever
de-busses on its own — so the unlock recipe now sets one flag where it used
to set two, and the trailing best-effort Set(Bus, off) is gone.

Set(Encryption, STATE_OFF) is the load-bearing step: the drive acts
pre-authenticated, so a bare 0xAD returns the VID with no cert and no AKE,
and content comes back de-bussed. Failure still maps to VidUnavailable.

Hardware-validated against fw 0.9.0 on BU40N 1.00 with a UHD disc: every
sampled unit returns de-bussed and opens with the AACS unit key resolved
from the live keyserver.
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License: MIT CI codecov

freemkv-unlock

The unlock layer for the freemkv toolchain.

An unlocker removes a drive-level bus-encryption barrier so the drive serves readable (de-bus'd / de-scrambled) sectors. Content-key decryption is a separate concern — the consumer's job.

This crate defines the Unlocker contract and a generic SCSI transport contract, and holds the self-contained unlocker modules. The consumer (libfreemkv) depends on this crate and dispatches through all_unlockers(); it never names an individual unlocker, and clients of libfreemkv are oblivious to unlockers entirely (as they are to the SCSI layer).

use freemkv_unlock::UnlockError;

// Drive-prep: try each unlocker's feature unlock until one claims the drive.
// `NotApplicable` means "not this unlocker's drive" — move on; a transport
// error means a dead bus — abort. `unlock_bus` follows the same contract for
// removing per-disc bus encryption.
for u in freemkv_unlock::all_unlockers() {
    match u.unlock_features(&mut scsi, &ctx) {
        Ok(unlocked) => return Ok(unlocked),
        Err(UnlockError::NotApplicable) => continue,
        Err(e) => return Err(e),
    }
}

To remove an unlocker, delete its module directory and its one line in all_unlockers() — nothing else changes.

License

freemkv-unlock's own source is MIT — see LICENSE.

src/ld/profiles.json bundles volatile, RAM-only LibreDrive microcode authored and owned by the MakeMKV team (GuinpinSoft inc.) — Copyright (c) MakeMKV team, all rights reserved. That microcode is third-party proprietary material, not covered by the MIT license; no ownership is claimed. See NOTICE. With thanks to the MakeMKV team for LibreDrive.

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