tree e4666d29cb06ad4e73013f77cda240953756a204
parent 53ad534d6f763cb00844a83c80c9a8a050c9a657
author Yo Chiang <yochiang@google.com> 1602062997 +0800
committer Yo Chiang <yochiang@google.com> 1602586708 +0000

Destroy DSU metadata encryption key when wiping an installation

Call IVold::destroyDsuMetadataKey() to destroy the old key.
This ensures that wiping and reinstalling a DSU system would generate
different metadata encryption keys, albeit using the same key dir.

Bug: 168571434
Test: 1. Install a DSU system.
  2. Boot the DSU system and reboot back to the host system.
  3. Wipe the DSU installation.
  4. DSU metadata key dir /metadata/vold/metadata_encryption/dsu/dsu is
     destroyed.
Change-Id: I5b66c6ac440f857a7bb22341d5dc70480a4075b2