tree 629ed67bc828363deb14331a407d7be761e07f1a
parent 77d6c9db32f02765bded7cc3664fe69397cc788c
author Michael Ryleev <gmar@google.com> 1513811942 -0800
committer Michael Ryleev <gmar@google.com> 1515714086 -0800

[app][hwcrypto] Switch to use different kdfv1 root key

The previous implementation used RPMB authentication key
as a root for kdfv1 key derivation function. Such key is
shared with external hardware and it is unclear how well
this secret is kept by it. It is better to use secret that
is tied to device itself which is introduced by this CL.

Change-Id: I61b408da6880fac0d3013c5beac8e0ed9d53a0ab