Commit Graph

3 Commits

Author SHA1 Message Date
bigbiff
2e344ab7fb fscrypt: integrate v1 processing into TWRP
Change-Id: I3bf9c14b818f9c3e0570c44c82bf0769fcec907f
2021-05-18 20:35:53 -04:00
bigbiff
a957f078be FsCrypt update: support fscrypt policies v1 and v2
This patchset introduces support decryption for Android 11.

In this update we deprecate ext4crypt. To specify the
policy version to use, use TW_USE_FSCRYPT_POLICY := 1 or
TW_USE_FSCRYPT_POLICY := 2. By default policy version will
be set to 2 if this variable is omitted.

Change-Id: I62a29c1bef36c259ec4b11259f71be613d20a112
2021-05-18 20:35:51 -04:00
bigbiff
7ba7500953 decrypt: AOSP 10 requires the use of fscrypt
fscrypt aosp doc: https://source.android.com/security/encryption/file-based
kernel fscrypt doc: https://www.kernel.org/doc/html/v4.18/filesystems/fscrypt.html

This commit implements the ability for TWRP to use fscrypt to decrypt
files on the fscrypt implementation. It has been implemented mostly
in a new successor library to e4crypt called libtwrpfscrypt. Most of the
code was ported from AOSP vold.

Notable updates include:
 - updated policy storage by libtar
 - lookup of fbe policies by libtwrpfscrypt
 - threaded keystore operations

Big thanks to Dees_Troy for the initial trailblazing
of encryption in TWRP.

Change-Id: I69cd2eba3693a9914e00213d4943229635d0cdae
2020-06-22 12:17:22 +02:00