CR50: add a golden test for RSA key gen from a fixed seed

Add a test that verifies RSA keygen from a fixed seed and
template from the TCG EK Credential Profile spec.

BRANCH=none
BUG=chrome-os-partner:43025,chrome-os-partner:47524
TEST=tests under test/tpmtest pass

Change-Id: I2f1cfb8460a0497c93079b89b9ff4e031eaff358
Reviewed-on: https://chromium-review.googlesource.com/356561
Commit-Ready: Nagendra Modadugu <ngm@google.com>
Tested-by: Nagendra Modadugu <ngm@google.com>
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
2 files changed