cr50: SHA1 and SHA256 implementation with hardware support

This change includes hardware and software support for SHA1/256 on
CR50. When running in the RO image, only hardware sha256 support is
included. When running in the RW image, the code auto-selects between
the software and hardware implementation. Software implementation path
is taken if the hardware is currently in use by some other context.

Refactor the CR50 loader to use this abstraction.

The existing software implementation for SHA1 and SHA256 is used for
the software path.

CQ-DEPEND=CL:*239385
BRANCH=none
TEST=EC shell boots fine (implies that SHA256 works)
BUG=chrome-os-partner:43025

Change-Id: I7bcefc12fcef869dac2e48793bd0cb5ce8e80d5b
Signed-off-by: nagendra modadugu <ngm@google.com>
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/313011

1 files changed, 11 insertions, 0 deletions

diff --git a/board/cr50/tpm2/hash_data.c b/board/cr50/tpm2/hash_data.c
new file mode 100644
index 0000000000..6e6ad8aa4d
--- /dev/null
+++ b/board/cr50/tpm2/hash_data.c
@@ -0,0 +1,11 @@
+/* Copyright 2015 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "CryptoEngine.h"
+
+/*
+ * This is unfortunate, but this is the only way to bring in necessary data
+ * from the TPM2 library, as this file is not compiled in embedded mode.
+ */
+#include "CpriHashData.c"