tree 3c5bb2d55ada1d1e5f15f4e9ba470928885f26b2
parent 0ef7bfd59c0a97b39b2e1152da30db4e96e3a915
author Eric Biggers <ebiggers@google.com> 1547672734 -0800
committer Eric Biggers <ebiggers@google.com> 1547846768 -0800

cryptfs: check for errors in create_encrypted_random_key()

When generating the key and salt we weren't checking for an error
opening or reading from /dev/urandom.  Switch to the helper function
ReadRandomBytes() and start checking for errors.

Test: Booted device with FDE.  As a extra sanity check I also
      temporarily added log messages that dump the key and salt,
      and I verified they still appear random.
Change-Id: I01ccee4f1f9910bf9508c8f02a918157393b0e68