Replace string secret with a byte[] for CE storage in vold binder
Replace the current `string secret` argument to the lock/unlock of
CE storage with a `byte[]`. This is part of an effort to remove
instances of the LSKF and LSKF-derived secrets that are available
in a RAMdump -- since the strings are passed from Java, they cannot
be cleared, but `byte[]` can be.
This CL is the described argument change, and the propagation of this
change to the various functions that are called by the vold binder
functions.
Bug: 320392352
Test: Manual upgrade test:
1. Flash the device with a build not including these changes
2. Rebuild with these changes
3. Flash the device (but do not wipe) with the build including
these changes
4. See if the device boots and works normally -- if the CE
storage cannot be unlocked it will not start up and be usable
when the user logs in.
Change-Id: Icd4c925f2fd79e7533fdf9027e16f6736dbe1ab3
5 files changed
