tree 57aea4514a131c118a9f4406d6c9725de9209022
parent 09b77ce600270b12fae2c7f665a18a6f01a8b09c
author Shawn Willden <swillden@google.com> 1607394677 -0700
committer Shawn Willden <swillden@google.com> 1607986774 -0700

Update the message versioning system.

A few changes to message versioning, and KM versioning:

1.  Change GetVersionResponse to use a uint32_t's rather than
    uint8_t's.  This is a little dangerous because it will break any
    existing uses of GetVersionResponse (which isn't
    versionable!). But as far as I can tell, no one is presently using
    GetVersion.
2.  Update MessageVersion() to include support for KM3/4.
3.  Distinguish between the default message version and the max
    message version, and use the former (which is usually the same as
    the latter) as the default for the message ctors.
4.  Change the KmVersion enum to be more complete, which requires
    breaking from the previous plan to have the enum values track the
    attestation KM version values.
5.  Change the AndroidKeymaster::GetVersion method to use the
    KmVersion to determine what version values to return.

Test: keymaster_tests
Change-Id: I9ee5a3e8adf8eb04bb32146601ecdaaff133a3b7