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
--- /dev/null
+++ 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_ */