security/vboot: Add measured boot mode

* Introduce a measured boot mode into vboot.
* Add hook for stage measurements in prog_loader and cbfs.
* Implement and hook-up CRTM in vboot and check for suspend.

Change-Id: I339a2f1051e44f36aba9f99828f130592a09355e
Signed-off-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/29547
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/src/security/vboot/vboot_crtm.h b/src/security/vboot/vboot_crtm.h
new file mode 100644
index 0000000000..84ee9e63b5
--- /dev/null
+++ b/src/security/vboot/vboot_crtm.h
@@ -0,0 +1,62 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Facebook Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __SECURITY_VBOOT_CRTM_H__
+#define __SECURITY_VBOOT_CRTM_H__
+
+#include <program_loading.h>
+#include <security/tpm/tspi.h>
+#include <types.h>
+#include <cbfs.h>
+
+/* CRTM */
+#define TPM_CRTM_PCR 2
+
+/* PCR for measuring data which changes during runtime
+ * e.g. CMOS, NVRAM...
+ */
+#define TPM_RUNTIME_DATA_PCR 3
+
+/*
+ * Initializes the Core Root of Trust for Measurements
+ * in coreboot. The initial code in a chain of trust must measure
+ * itself.
+ *
+ * Summary:
+ *  + Measures bootblock in CBFS or BOOTBLOCK FMAP partition.
+ *  + If vboot starts in romstage, it measures the romstage
+ *    in CBFS.
+ *  + Measure the verstage if it is compiled as separate
+ *    stage.
+ *
+ * Takes the current vboot context as parameter for s3 checks.
+ * returns on success VB2_SUCCESS, else a vboot error.
+ */
+uint32_t vboot_init_crtm(void);
+
+#if (IS_ENABLED(CONFIG_VBOOT_MEASURED_BOOT) && \
+!ENV_BOOTBLOCK && !ENV_DECOMPRESSOR && !ENV_SMM)
+/*
+ * Measures cbfs data via hook (cbfs)
+ * fh is the cbfs file handle to measure
+ * return 0 if successful, else an error
+ */
+uint32_t vboot_measure_cbfs_hook(struct cbfsf *fh, const char *name);
+
+#else
+#define vboot_measure_cbfs_hook(fh, name) 0
+#endif
+
+#endif /* __VBOOT_VBOOT_CRTM_H__ */