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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* Copyright (c) 2022, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#ifndef PSA_MEASURED_BOOT_H
#define PSA_MEASURED_BOOT_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "psa/error.h"
/* Minimum measurement value size that can be requested to store */
#define MEASUREMENT_VALUE_MIN_SIZE 32U
/* Maximum measurement value size that can be requested to store */
#define MEASUREMENT_VALUE_MAX_SIZE 64U
/* Minimum signer id size that can be requested to store */
#define SIGNER_ID_MIN_SIZE MEASUREMENT_VALUE_MIN_SIZE
/* Maximum signer id size that can be requested to store */
#define SIGNER_ID_MAX_SIZE MEASUREMENT_VALUE_MAX_SIZE
/* The theoretical maximum image version is: "255.255.65535\0" */
#define VERSION_MAX_SIZE 14U
/* Example sw_type: "BL_2, BL_33, etc." */
#define SW_TYPE_MAX_SIZE 20U
#define NUM_OF_MEASUREMENT_SLOTS 32U
/**
* Extends and stores a measurement to the requested slot.
*
* index Slot number in which measurement is to be stored
* signer_id Pointer to signer_id buffer.
* signer_id_size Size of the signer_id in bytes.
* version Pointer to version buffer.
* version_size Size of the version string in bytes.
* measurement_algo Algorithm identifier used for measurement.
* sw_type Pointer to sw_type buffer.
* sw_type_size Size of the sw_type string in bytes.
* measurement_value Pointer to measurement_value buffer.
* measurement_value_size Size of the measurement_value in bytes.
* lock_measurement Boolean flag requesting whether the measurement
* is to be locked.
*
* PSA_SUCCESS:
* - Success.
* PSA_ERROR_INVALID_ARGUMENT:
* - The size of any argument is invalid OR
* - Input Measurement value is NULL OR
* - Input Signer ID is NULL OR
* - Requested slot index is invalid.
* PSA_ERROR_BAD_STATE:
* - Request to lock, when slot is already locked.
* PSA_ERROR_NOT_PERMITTED:
* - When the requested slot is not accessible to the caller.
*/
/* Not a standard PSA API, just an extension therefore use the 'rss_' prefix
* rather than the usual 'psa_'.
*/
psa_status_t
rss_measured_boot_extend_measurement(uint8_t index,
const uint8_t *signer_id,
size_t signer_id_size,
const uint8_t *version,
size_t version_size,
uint32_t measurement_algo,
const uint8_t *sw_type,
size_t sw_type_size,
const uint8_t *measurement_value,
size_t measurement_value_size,
bool lock_measurement);
/**
* Retrieves a measurement from the requested slot.
*
* index Slot number from which measurement is to be
* retrieved.
* signer_id Pointer to signer_id buffer.
* signer_id_size Size of the signer_id buffer in bytes.
* signer_id_len On success, number of bytes that make up
* signer_id.
* version Pointer to version buffer.
* version_size Size of the version buffer in bytes.
* version_len On success, number of bytes that makeup the
* version.
* measurement_algo Pointer to measurement_algo.
* sw_type Pointer to sw_type buffer.
* sw_type_size Size of the sw_type buffer in bytes.
* sw_type_len On success, number of bytes that makeup the
* sw_type.
* measurement_value Pointer to measurement_value buffer.
* measurement_value_size Size of the measurement_value buffer in bytes.
* measurement_value_len On success, number of bytes that make up the
* measurement_value.
* is_locked Pointer to lock status of requested measurement
* slot.
*
* PSA_SUCCESS
* - Success.
* PSA_ERROR_INVALID_ARGUMENT
* - The size of at least one of the output buffers is incorrect or the
* requested slot index is invalid.
* PSA_ERROR_DOES_NOT_EXIST
* - The requested slot is empty, does not contain a measurement.
*/
psa_status_t rss_measured_boot_read_measurement(uint8_t index,
uint8_t *signer_id,
size_t signer_id_size,
size_t *signer_id_len,
uint8_t *version,
size_t version_size,
size_t *version_len,
uint32_t *measurement_algo,
uint8_t *sw_type,
size_t sw_type_size,
size_t *sw_type_len,
uint8_t *measurement_value,
size_t measurement_value_size,
size_t *measurement_value_len,
bool *is_locked);
#endif /* PSA_MEASURED_BOOT_H */
|
