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
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
Includes various minor fixes for building in Android 8 trees with r23+ tag
Update FBE extended header in libtar to version 2 and include the entire
ext4_encryption_policy structure now after translating the policy.
See this post for more details:
https://plus.google.com/u/1/+DeesTroy/posts/i33ygUi7tiu
Change-Id: I2af981e51f459b17fcd895fb8c2d3f6c8200e24b
All updates and fixes applied from upstream libtar as of
March 1, 2016.
Debug flag is disabled, however non-debug output now
provides 1 line of useful output per object extracted.
I've also merged some fixes from CyanogenMod's
fork of libtar:
From: Tom Marshall <tdm@cyngn.com>
Date: Thu, 11 Feb 2016 16:24:40 -0800
Subject: libtar: Cleanup, secure, and extend numeric fields
Commit: e18b457ea1cbf6be1adc3b75450ed1c737cd82ea
From: Tom Marshall <tdm@cyngn.com>
Date: Thu, 11 Feb 2016 12:49:30 -0800
Subject: libtar: Make file sizes 64-bit clean
Commit: e628c2025549a24018bc568351465130a05daafb
From: Tom Marshall <tdm@cyngn.com>
Date: Thu, 17 Apr 2014 09:39:25 -0700
Subject: libtar: Add methods for in-memory files
Commit: 8ec5627a8ff0a91724c6d5b344f0e887da922527
From: Tom Marshall <tdm@cyngn.com>
Date: Wed, 2 Jul 2014 09:34:40 -0700
Subject: libtar: Fix hardlink extract
Commit: 166d83a51e0c51abcea37694dbd7df92d03c1f56
From: philz-cwm6 <phytowardt@gmail.com>
Date: Sat, 26 Apr 2014 01:11:35 +0200
Subject: libtar: Various bug fixes and enhancements
Commit: a271d763e94235ccee9ecaabdb52bf4b9b2f8c06
(Some of this was not merged in, as better solutions were
available from upstream libtar)
From: Tom Marshall <tdm@cyngn.com>
Date: Wed, 9 Apr 2014 09:35:54 -0700
Subject: libtar: Add const qualifiers to reduce compile warnings
Commit: 0600afa19fe827d06d3fcf24a7aabd52dbf487b4
Change-Id: I6d008cb6fdf950f835bbed63aeb8727cc5c86083
