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authorPhilipp Deppenwiese <zaolin@das-labor.org>2018-02-27 19:40:52 +0100
committerMartin Roth <martinroth@google.com>2018-06-04 20:33:07 +0000
commitc07f8fbe6fd13e4245da71574b52b47e9733db84 (patch)
tree12db8b3c40552eab81045c6165538e2d3ba36ce8 /src/security/vboot/antirollback.h
parent961d31bdb3c97e177156ed335d6f2c726d08ab51 (diff)
downloadcoreboot-c07f8fbe6fd13e4245da71574b52b47e9733db84.tar.xz
security/tpm: Unify the coreboot TPM software stack
* Remove 2nd software stack in pc80 drivers directory. * Create TSPI interface for common usage. * Refactor TSS / TIS code base. * Add vendor tss (Cr50) directory. * Change kconfig options for TPM to TPM1. * Add user / board configuration with: * MAINBOARD_HAS_*_TPM # * BUS driver * MAINBOARD_HAS_TPM1 or MAINBOARD_HAS_TPM2 * Add kconfig TPM user selection (e.g. pluggable TPMs) * Fix existing headers and function calls. * Fix vboot for interface usage and antirollback mode. Change-Id: I7ec277e82a3c20c62a0548a1a2b013e6ce8f5b3f Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org> Reviewed-on: https://review.coreboot.org/24903 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/security/vboot/antirollback.h')
-rw-r--r--src/security/vboot/antirollback.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/security/vboot/antirollback.h b/src/security/vboot/antirollback.h
new file mode 100644
index 0000000000..be42f009e7
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+++ b/src/security/vboot/antirollback.h
@@ -0,0 +1,66 @@
+/* Copyright (c) 2013 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.
+ *
+ * Functions for querying, manipulating and locking rollback indices
+ * stored in the TPM NVRAM.
+ */
+
+#ifndef ANTIROLLBACK_H_
+#define ANTIROLLBACK_H_
+
+#include <types.h>
+#include <security/tpm/tspi.h>
+
+struct vb2_context;
+enum vb2_pcr_digest;
+
+/* TPM NVRAM location indices. */
+#define FIRMWARE_NV_INDEX 0x1007
+#define KERNEL_NV_INDEX 0x1008
+/* 0x1009 used to be used as a backup space. Think of conflicts if you
+ * want to use 0x1009 for something else. */
+#define BACKUP_NV_INDEX 0x1009
+#define FWMP_NV_INDEX 0x100a
+#define REC_HASH_NV_INDEX 0x100b
+#define REC_HASH_NV_SIZE VB2_SHA256_DIGEST_SIZE
+
+/* Structure definitions for TPM spaces */
+
+/* Flags for firmware space */
+
+/*
+ * Last boot was developer mode. TPM ownership is cleared when transitioning
+ * to/from developer mode.
+ */
+#define FLAG_LAST_BOOT_DEVELOPER 0x01
+
+/* All functions return TPM_SUCCESS (zero) if successful, non-zero if error */
+
+uint32_t antirollback_read_space_firmware(struct vb2_context *ctx);
+
+/**
+ * Write may be called if the versions change.
+ */
+uint32_t antirollback_write_space_firmware(struct vb2_context *ctx);
+
+/**
+ * Lock must be called.
+ */
+uint32_t antirollback_lock_space_firmware(void);
+
+/* Read recovery hash data from TPM. */
+uint32_t antirollback_read_space_rec_hash(uint8_t *data, uint32_t size);
+/* Write new hash data to recovery space in TPM. */
+uint32_t antirollback_write_space_rec_hash(const uint8_t *data, uint32_t size);
+/* Lock down recovery hash space in TPM. */
+uint32_t antirollback_lock_space_rec_hash(void);
+
+/* Start of the root of trust */
+uint32_t vboot_setup_tpm(struct vb2_context *ctx);
+
+/* vboot_extend_pcr function for vb2 context */
+uint32_t vboot_extend_pcr(struct vb2_context *ctx, int pcr,
+ enum vb2_pcr_digest which_digest);
+
+#endif /* ANTIROLLBACK_H_ */