commit 09621a42f86690346814c48cf1cdb1f123402e12
author Roshan Pius <rpius@google.com> Tue Oct 22 16:38:36 2019 -0700
committer Roshan Pius <rpius@google.com> Thu Nov 14 12:12:55 2019 -0800
tree 52a587e81b7b78424e1c5797bdc80cc6072046ae
parent 6237115f3c6ae723eb3927640c843714793fbe59

WifiConfigStore: Encrypt credentials for networks (3/4)

Encrypt/Decrypt preSharedKey & enterprise config's password fields.
When deserializing, handle migration from older config store
version file.

Any encryption failure are silently ignored. Decryption failures are
however non-recoverable.

Bug: 140485110
Test: atest com.android.server.wifi
Test: Manual verification
- Store a PSK network config on older build
- Upgrade to build with this CL
- Ensured that the psk was read correctly on upgrade
- Ensured that the psk was encrypted when stored on disk after upgrade
Change-Id: Ic7673cb375c9e5447ff4074ed78321152573e1c3
Merged-In: Ic7673cb375c9e5447ff4074ed78321152573e1c3