libfscrypt: Support hardware wrapped keys
Some inline encryption hardware supports protecting
file based encryption keys in hardware without software
having access to or ability to set plaintext keys.
New fileencryption fstab flag 'wrappedkey_v0' is added to
support these hardware. libfscrypt parses the flag and
adds the flag to EncryptionOptions allowing vold to determine
the status.
Test: FBE validation with Fscrypt v2 + inline crypt + wrapped
key changes kernel.
Bug: 147733587
Change-Id: I9fb2b2d6e510a5316976d7698e26a1aae1548ce6
2 files changed