decrypt: AOSP 10 requires the use of fscrypt

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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

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This commit is contained in:

bigbiff

2020-04-11 20:47:09 -04:00

committed by mauronofrio

parent f4c1553789

commit 7ba7500953

60 changed files with 8117 additions and 280 deletions

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crypto/fscrypt/Decrypt.cpp

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