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
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
|
/**
******************************************************************************
* @file stm32wbxx_hal_cryp_ex.c
* @author MCD Application Team
* @brief CRYPEx HAL module driver.
* This file provides firmware functions to manage the extended
* functionalities of the Cryptography (CRYP) peripheral.
*
******************************************************************************
* @attention
*
* Copyright (c) 2019 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32wbxx_hal.h"
/** @addtogroup STM32WBxx_HAL_Driver
* @{
*/
/** @addtogroup CRYPEx
* @{
*/
#ifdef HAL_CRYP_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @addtogroup CRYPEx_Private_Defines
* @{
*/
#define CRYP_PHASE_INIT 0x00000000U /*!< GCM/GMAC (or CCM) init phase */
#define CRYP_PHASE_HEADER AES_CR_GCMPH_0 /*!< GCM/GMAC or CCM header phase */
#define CRYP_PHASE_PAYLOAD AES_CR_GCMPH_1 /*!< GCM(/CCM) payload phase */
#define CRYP_PHASE_FINAL AES_CR_GCMPH /*!< GCM/GMAC or CCM final phase */
#define CRYP_OPERATINGMODE_ENCRYPT 0x00000000U /*!< Encryption mode */
#define CRYP_OPERATINGMODE_KEYDERIVATION AES_CR_MODE_0 /*!< Key derivation mode only used when performing ECB and CBC decryptions */
#define CRYP_OPERATINGMODE_DECRYPT AES_CR_MODE_1 /*!< Decryption */
#define CRYP_OPERATINGMODE_KEYDERIVATION_DECRYPT AES_CR_MODE /*!< Key derivation and decryption only used when performing ECB and CBC decryptions */
#define CRYPEx_PHASE_PROCESS 0x02U /*!< CRYP peripheral is in processing phase */
#define CRYPEx_PHASE_FINAL 0x03U /*!< CRYP peripheral is in final phase this is relevant only with CCM and GCM modes */
/* CTR0 information to use in CCM algorithm */
#define CRYP_CCM_CTR0_0 0x07FFFFFFU
#define CRYP_CCM_CTR0_3 0xFFFFFF00U
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions---------------------------------------------------------*/
/** @addtogroup CRYPEx_Exported_Functions
* @{
*/
/** @defgroup CRYPEx_Exported_Functions_Group1 Extended AES processing functions
* @brief Extended processing functions.
*
@verbatim
==============================================================================
##### Extended AES processing functions #####
==============================================================================
[..] This section provides functions allowing to generate the authentication
TAG in Polling mode
(#)HAL_CRYPEx_AESGCM_GenerateAuthTAG
(#)HAL_CRYPEx_AESCCM_GenerateAuthTAG
they should be used after Encrypt/Decrypt operation.
@endverbatim
* @{
*/
/**
* @brief generate the GCM authentication TAG.
* @param hcryp pointer to a CRYP_HandleTypeDef structure that contains
* the configuration information for CRYP module
* @param AuthTag Pointer to the authentication buffer
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CRYPEx_AESGCM_GenerateAuthTAG(CRYP_HandleTypeDef *hcryp, uint32_t *AuthTag, uint32_t Timeout)
{
uint32_t tickstart;
/* Assume first Init.HeaderSize is in words */
uint64_t headerlength = (uint64_t)hcryp->Init.HeaderSize * 32U; /* Header length in bits */
uint64_t inputlength = (uint64_t)hcryp->SizesSum * 8U; /* Input length in bits */
uint32_t tagaddr = (uint32_t)AuthTag;
/* Correct headerlength if Init.HeaderSize is actually in bytes */
if (hcryp->Init.HeaderWidthUnit == CRYP_HEADERWIDTHUNIT_BYTE)
{
headerlength /= 4U;
}
if (hcryp->State == HAL_CRYP_STATE_READY)
{
/* Process locked */
__HAL_LOCK(hcryp);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_BUSY;
/* Check if initialization phase has already been performed */
if (hcryp->Phase == CRYPEx_PHASE_PROCESS)
{
/* Change the CRYP phase */
hcryp->Phase = CRYPEx_PHASE_FINAL;
}
else /* Initialization phase has not been performed*/
{
/* Disable the Peripheral */
__HAL_CRYP_DISABLE(hcryp);
/* Sequence error code field */
hcryp->ErrorCode |= HAL_CRYP_ERROR_AUTH_TAG_SEQUENCE;
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
/* Select final phase */
MODIFY_REG(hcryp->Instance->CR, AES_CR_GCMPH, CRYP_PHASE_FINAL);
/* Set the encrypt operating mode*/
MODIFY_REG(hcryp->Instance->CR, AES_CR_MODE, CRYP_OPERATINGMODE_ENCRYPT);
/*TinyAES peripheral from V3.1.1 : data has to be inserted normally (no swapping)*/
/* Write into the AES_DINR register the number of bits in header (64 bits)
followed by the number of bits in the payload */
hcryp->Instance->DINR = 0U;
hcryp->Instance->DINR = (uint32_t)(headerlength);
hcryp->Instance->DINR = 0U;
hcryp->Instance->DINR = (uint32_t)(inputlength);
/* Wait for CCF flag to be raised */
tickstart = HAL_GetTick();
while (HAL_IS_BIT_CLR(hcryp->Instance->SR, AES_SR_CCF))
{
/* Check for the Timeout */
if (Timeout != HAL_MAX_DELAY)
{
if (((HAL_GetTick() - tickstart) > Timeout)||(Timeout == 0U))
{
/* Disable the CRYP peripheral clock */
__HAL_CRYP_DISABLE(hcryp);
/* Change state */
hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
}
}
/* Read the authentication TAG in the output FIFO */
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
/* Clear CCF flag */
__HAL_CRYP_CLEAR_FLAG(hcryp, CRYP_CCF_CLEAR);
/* Disable the peripheral */
__HAL_CRYP_DISABLE(hcryp);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
}
else
{
/* Busy error code field */
hcryp->ErrorCode |= HAL_CRYP_ERROR_BUSY;
return HAL_ERROR;
}
/* Return function status */
return HAL_OK;
}
/**
* @brief AES CCM Authentication TAG generation.
* @param hcryp pointer to a CRYP_HandleTypeDef structure that contains
* the configuration information for CRYP module
* @param AuthTag Pointer to the authentication buffer
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CRYPEx_AESCCM_GenerateAuthTAG(CRYP_HandleTypeDef *hcryp, uint32_t *AuthTag, uint32_t Timeout)
{
uint32_t tagaddr = (uint32_t)AuthTag;
uint32_t tickstart;
if (hcryp->State == HAL_CRYP_STATE_READY)
{
/* Process locked */
__HAL_LOCK(hcryp);
/* Disable interrupts in case they were kept enabled to proceed
a single message in several iterations */
__HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_CCFIE | CRYP_IT_ERRIE);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_BUSY;
/* Check if initialization phase has already been performed */
if (hcryp->Phase == CRYPEx_PHASE_PROCESS)
{
/* Change the CRYP phase */
hcryp->Phase = CRYPEx_PHASE_FINAL;
}
else /* Initialization phase has not been performed*/
{
/* Disable the peripheral */
__HAL_CRYP_DISABLE(hcryp);
/* Sequence error code field */
hcryp->ErrorCode |= HAL_CRYP_ERROR_AUTH_TAG_SEQUENCE;
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
/* Select final phase */
MODIFY_REG(hcryp->Instance->CR, AES_CR_GCMPH, CRYP_PHASE_FINAL);
/* Set encrypt operating mode*/
MODIFY_REG(hcryp->Instance->CR, AES_CR_MODE, CRYP_OPERATINGMODE_ENCRYPT);
/* Wait for CCF flag to be raised */
tickstart = HAL_GetTick();
while (HAL_IS_BIT_CLR(hcryp->Instance->SR, AES_SR_CCF))
{
/* Check for the Timeout */
if (Timeout != HAL_MAX_DELAY)
{
if (((HAL_GetTick() - tickstart) > Timeout) ||(Timeout == 0U))
{
/* Disable the CRYP peripheral Clock */
__HAL_CRYP_DISABLE(hcryp);
/* Change state */
hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
}
}
/* Read the authentication TAG in the output FIFO */
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
/* Clear CCF Flag */
__HAL_CRYP_CLEAR_FLAG(hcryp, CRYP_CCF_CLEAR);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
/* Disable CRYP */
__HAL_CRYP_DISABLE(hcryp);
}
else
{
/* Busy error code field */
hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY;
return HAL_ERROR;
}
/* Return function status */
return HAL_OK;
}
/**
* @}
*/
/** @defgroup CRYPEx_Exported_Functions_Group2 Extended AES Key Derivations functions
* @brief Extended Key Derivations functions.
*
@verbatim
==============================================================================
##### Key Derivation functions #####
==============================================================================
[..] This section provides functions allowing to Enable or Disable the
the AutoKeyDerivation parameter in CRYP_HandleTypeDef structure
These function are allowed only in TinyAES peripheral.
@endverbatim
* @{
*/
/**
* @brief AES enable key derivation functions
* @param hcryp pointer to a CRYP_HandleTypeDef structure.
*/
void HAL_CRYPEx_EnableAutoKeyDerivation(CRYP_HandleTypeDef *hcryp)
{
if (hcryp->State == HAL_CRYP_STATE_READY)
{
hcryp->AutoKeyDerivation = ENABLE;
}
else
{
/* Busy error code field */
hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY;
}
}
/**
* @brief AES disable key derivation functions
* @param hcryp pointer to a CRYP_HandleTypeDef structure.
*/
void HAL_CRYPEx_DisableAutoKeyDerivation(CRYP_HandleTypeDef *hcryp)
{
if (hcryp->State == HAL_CRYP_STATE_READY)
{
hcryp->AutoKeyDerivation = DISABLE;
}
else
{
/* Busy error code field */
hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY;
}
}
/**
* @}
*/
/**
* @}
*/
#endif /* HAL_CRYP_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
|
