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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file hal_crypto.h
* @brief Cryptographic Driver macros and structures.
*
* @addtogroup CRYPTO
* @{
*/
#ifndef HAL_CRYPTO_H
#define HAL_CRYPTO_H
#if (HAL_USE_CRY == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* #brief Maximum size of a key for all supported algorithms.
*/
#define HAL_CRY_MAX_KEY_SIZE 32
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief Enables the SW fall-back of the cryptographic driver.
* @details When enabled, this option, activates a fall-back software
* implementation for algorithms not supported by the underlying
* hardware.
* @note Fall-back implementations may not be present for all algorithms.
*/
#if !defined(HAL_CRY_USE_FALLBACK) || defined(__DOXYGEN__)
#define HAL_CRY_USE_FALLBACK FALSE
#endif
/**
* @brief Makes the driver forcibly use the fall-back implementations.
*/
#if !defined(HAL_CRY_ENFORCE_FALLBACK) || defined(__DOXYGEN__)
#define HAL_CRY_ENFORCE_FALLBACK FALSE
#endif
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if HAL_CRY_ENFORCE_FALLBACK == TRUE
#undef HAL_CRY_USE_FALLBACK
#define HAL_CRY_USE_FALLBACK TRUE
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
CRY_UNINIT = 0, /**< Not initialized. */
CRY_STOP = 1, /**< Stopped. */
CRY_READY = 2 /**< Ready. */
} crystate_t;
/**
* @brief Driver error codes.
*/
typedef enum {
CRY_NOERROR = 0, /**< No error. */
CRY_ERR_INV_ALGO = 1, /**< Invalid cypher/mode. */
CRY_ERR_INV_KEY_SIZE = 2, /**< Invalid key size. */
CRY_ERR_INV_KEY_TYPE = 3, /**< Invalid key type. */
CRY_ERR_INV_KEY_ID = 4 /**< Invalid key type. */
} cryerror_t;
/**
* @brief Type of an algorithm identifier.
* @note It is only used to determine the key required for operations.
*/
typedef enum {
cry_algo_none = 0,
cry_algo_aes,
cry_algo_des,
cry_algo_tripledes
} cryalgorithm_t;
#if HAL_CRY_ENFORCE_FALLBACK == FALSE
/* Use the defined low level driver.*/
#include "hal_crypto_lld.h"
#else
/* No LLD at all, using the standalone mode.*/
#define CRY_LLD_SUPPORTS_AES_ECB FALSE
#define CRY_LLD_SUPPORTS_AES_CBC FALSE
#define CRY_LLD_SUPPORTS_AES_CFB FALSE
#define CRY_LLD_SUPPORTS_AES_CTR FALSE
typedef uint_fast8_t crykey_t;
typedef struct CRYDriver CRYDriver;
typedef struct {
uint32_t dummy;
} CRYConfig;
struct CRYDriver {
crystate_t state;
const CRYConfig *config;
cryalgorithm_t key0_type;
size_t key0_size;
uint8_t key0_buffer[HAL_CRY_MAX_KEY_SIZE];
};
#endif
#if !defined(CRY_LLD_SUPPORTS_AES_ECB) || \
!defined(CRY_LLD_SUPPORTS_AES_CBC) || \
!defined(CRY_LLD_SUPPORTS_AES_CFB) || \
!defined(CRY_LLD_SUPPORTS_AES_CTR)
#error "CRYPTO LLD does not export required switches"
#endif
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @name Low level driver helper macros
* @{
*/
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void cryInit(void);
void cryObjectInit(CRYDriver *cryp);
void cryStart(CRYDriver *cryp, const CRYConfig *config);
void cryStop(CRYDriver *cryp);
cryerror_t cryLoadTransientKey(CRYDriver *cryp,
cryalgorithm_t algorithm,
size_t size,
const uint8_t *keyp);
cryerror_t cryEncryptAES_ECB(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out);
cryerror_t cryDecryptAES_ECB(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out);
cryerror_t cryEncryptAES_CBC(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out,
const uint8_t *iv);
cryerror_t cryDecryptAES_CBC(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out,
const uint8_t *iv);
cryerror_t cryEncryptAES_CFB(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out,
const uint8_t *iv);
cryerror_t cryDecryptAES_CFB(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out,
const uint8_t *iv);
cryerror_t cryEncryptAES_CTR(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out,
const uint8_t *nonce,
uint8_t *cnt);
cryerror_t cryDecryptAES_CTR(CRYDriver *cryp,
crykey_t key_id,
size_t size,
const uint8_t *in,
uint8_t *out,
const uint8_t *nonce,
uint8_t *cnt);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_CRYPTO == TRUE */
#endif /* HAL_CRYPTO_H */
/** @} */
|
