aboutsummaryrefslogtreecommitdiffstats
path: root/os/hal/include/hal_crypto.h
blob: 01ce3c33fa0a3904ea8ae70804f68a736ffe47a7 (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
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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
/*
    ChibiOS - Copyright (C) 2006..2018 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   Size, in bits, of a crypto field or message.
 * @note    It is assumed, for simplicity, that this type is equivalent to
 *          a @p size_t.
 */
typedef size_t bitsize_t;

/**
 * @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,                             /**< AES 128, 192, 256 bits.    */
  cry_algo_des                              /**< DES 56, TDES 112, 168 bits.*/
} 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                FALSE
#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
#define CRY_LLD_SUPPORTS_AES_GCM            FALSE
#define CRY_LLD_SUPPORTS_DES                FALSE
#define CRY_LLD_SUPPORTS_DES_ECB            FALSE
#define CRY_LLD_SUPPORTS_DES_CBC            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) ||                                       \
    !defined(CRY_LLD_SUPPORTS_AES_ECB) ||                                   \
    !defined(CRY_LLD_SUPPORTS_AES_CBC) ||                                   \
    !defined(CRY_LLD_SUPPORTS_AES_CFB) ||                                   \
    !defined(CRY_LLD_SUPPORTS_AES_CTR) ||                                   \
    !defined(CRY_LLD_SUPPORTS_AES_GCM) ||                                   \
    !defined(CRY_LLD_SUPPORTS_DES) ||                                       \
    !defined(CRY_LLD_SUPPORTS_DES_ECB) ||                                   \
    !defined(CRY_LLD_SUPPORTS_DES_CBC)
#error "CRYPTO LLD does not export the 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(CRYDriver *cryp,
                               crykey_t key_id,
                               const uint8_t *in,
                               uint8_t *out);
  cryerror_t cryDecryptAES(CRYDriver *cryp,
                           crykey_t key_id,
                           const uint8_t *in,
                           uint8_t *out);
  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 *iv);
  cryerror_t cryDecryptAES_CTR(CRYDriver *cryp,
                               crykey_t key_id,
                               size_t size,
                               const uint8_t *in,
                               uint8_t *out,
                               const uint8_t *iv);
  cryerror_t cryEncryptAES_GCM(CRYDriver *cryp,
                               crykey_t key_id,
                               size_t size,
                               const uint8_t *in,
                               uint8_t *out,
                               const uint8_t *iv,
                               size_t aadsize,
                               const uint8_t *aad,
                               uint8_t *authtag);
  cryerror_t cryDecryptAES_GCM(CRYDriver *cryp,
                               crykey_t key_id,
                               size_t size,
                               const uint8_t *in,
                               uint8_t *out,
                               const uint8_t *iv,
                               size_t aadsize,
                               const uint8_t *aad,
                               uint8_t *authtag);
  cryerror_t cryEncryptDES(CRYDriver *cryp,
                           crykey_t key_id,
                           const uint8_t *in,
                           uint8_t *out);
  cryerror_t cryDecryptDES(CRYDriver *cryp,
                           crykey_t key_id,
                           const uint8_t *in,
                           uint8_t *out);
  cryerror_t cryEncryptDES_ECB(CRYDriver *cryp,
                               crykey_t key_id,
                               size_t size,
                               const uint8_t *in,
                               uint8_t *out);
  cryerror_t cryDecryptDES_ECB(CRYDriver *cryp,
                               crykey_t key_id,
                               size_t size,
                               const uint8_t *in,
                               uint8_t *out);
  cryerror_t cryEncryptDES_CBC(CRYDriver *cryp,
                               crykey_t key_id,
                               size_t size,
                               const uint8_t *in,
                               uint8_t *out,
                               const uint8_t *iv);
  cryerror_t cryDecryptDES_CBC(CRYDriver *cryp,
                               crykey_t key_id,
                               size_t size,
                               const uint8_t *in,
                               uint8_t *out,
                               const uint8_t *iv);
  cryerror_t crySHA1(CRYDriver *cryp, size_t size,
                     const uint8_t *in, uint8_t *out);
  cryerror_t crySHA256(CRYDriver *cryp, size_t size,
                       const uint8_t *in, uint8_t *out);
  cryerror_t crySHA512(CRYDriver *cryp, size_t size,
                       const uint8_t *in, uint8_t *out);
  cryerror_t cryTRNG(CRYDriver *cryp, uint8_t *out);
#ifdef __cplusplus
}
#endif

#endif /* HAL_USE_CRYPTO == TRUE */

#endif /* HAL_CRYPTO_H */

/** @} */