tree db4c12e35a731ebd477081b2cc95dad04bbd7fe1
parent 738241f93c066a2ef233dd0e12661bf808bfd915
author Alex Klyubin <klyubin@google.com> 1434128436 -0700
committer Alex Klyubin <klyubin@google.com> 1434130546 -0700

Obtain entropy later in crypto operations, when possible.

This makes Android Keystore crypto operations defer pulling entropy
from provided SecureRandom until KeyStore.finish, where appropriate.
Such as when performing asymmetric encryption or generating
signatures.

Bug: 18088752
Change-Id: I4a897754e9a846214cf0995c5514f98cf0edd76b