blob: be42f009e7dc1c3669292c9160d15e3881b4e583 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
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_ */
|
