On Fri, Jan 10, 2025 at 09:44:07AM +0100, Bartosz Golaszewski wrote: > On Fri, Dec 13, 2024 at 5:20 AM Eric Biggers <ebiggers@xxxxxxxxxx> wrote: > > > > This patchset is based on next-20241212 and is also available in git via: > > > > git fetch https://git.kernel.org/pub/scm/fs/fscrypt/linux.git wrapped-keys-v10 > > > > This patchset adds support for hardware-wrapped inline encryption keys, a > > security feature supported by some SoCs. It adds the block and fscrypt > > framework for the feature as well as support for it with UFS on Qualcomm SoCs. > > > > This feature is described in full detail in the included Documentation changes. > > But to summarize, hardware-wrapped keys are inline encryption keys that are > > wrapped (encrypted) by a key internal to the hardware so that they can only be > > unwrapped (decrypted) by the hardware. Initially keys are wrapped with a > > permanent hardware key, but during actual use they are re-wrapped with a > > per-boot ephemeral key for improved security. The hardware supports importing > > keys as well as generating keys itself. > > > > This differs from the existing support for hardware-wrapped keys in the kernel > > crypto API (also called "hardware-bound keys" in some places) in the same way > > that the crypto API differs from blk-crypto: the crypto API is for general > > crypto operations, whereas blk-crypto is for inline storage encryption. > > > > This feature is already being used by Android downstream for several years > > (https://source.android.com/docs/security/features/encryption/hw-wrapped-keys), > > but on other platforms userspace support will be provided via fscryptctl and > > tests via xfstests (I have some old patches for this that need to be updated). > > > > Maintainers, please consider merging the following preparatory patches for 6.14: > > > > - UFS / SCSI tree: patches 1-4 > > - MMC tree: patches 5-7 > > - Qualcomm / MSM tree: patch 8 > > > > IIUC The following patches will have to wait for the v6.15 cycle? > > [PATCH v10 9/15] soc: qcom: ice: make qcom_ice_program_key() take > struct blk_crypto_key > [PATCH v10 10/15] blk-crypto: add basic hardware-wrapped key support > [PATCH v10 11/15] blk-crypto: show supported key types in sysfs > [PATCH v10 12/15] blk-crypto: add ioctls to create and prepare > hardware-wrapped keys > [PATCH v10 13/15] fscrypt: add support for hardware-wrapped keys > [PATCH v10 14/15] soc: qcom: ice: add HWKM support to the ICE driver > [PATCH v10 15/15] ufs: qcom: add support for wrapped keys Yes, that's correct. - Eric
