Matthew Jackson 0842babe2d freemkv: SET must issue the data-in phase the firmware requires
FreemkvUnlocker::set sent the vendor SET with DataDirection::None + an
empty buffer, but the SET CDB advertises a MIN_ALLOC_LEN (64B) data-in
allocation and the drive ABORTS a no-data transfer (CHECK CONDITION /
Aborted Command — HW-confirmed on BU40N fw 0.8.1). Every Set(feature)
failed, so the load-bearing Set(Ake,off) failed and the whole freemkv
unlock aborted, silently falling back to the AACS/online key route
(autorip showed 'Unlockers — freemkv: no'). Mirror the working
FirmwareControl::set (exec_in): read the state table back over a
FromDevice phase and ignore it. Adds a regression test modelling the
drive's abort-without-data-phase contract.
2026-09-18 06:19:49 -07:00
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2026-09-02 12:27:57 -07:00
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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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