[303] | 1 | /**
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| 2 | ******************************************************************************
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| 3 | * @file stm32f4xx_hal_cryp_ex.c
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| 4 | * @author MCD Application Team
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| 5 | * @version V1.4.1
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| 6 | * @date 09-October-2015
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| 7 | * @brief Extended CRYP HAL module driver
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| 8 | * This file provides firmware functions to manage the following
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| 9 | * functionalities of CRYP extension peripheral:
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| 10 | * + Extended AES processing functions
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| 11 | *
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| 12 | @verbatim
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| 13 | ==============================================================================
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| 14 | ##### How to use this driver #####
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| 15 | ==============================================================================
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| 16 | [..]
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| 17 | The CRYP Extension HAL driver can be used as follows:
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| 18 | (#)Initialize the CRYP low level resources by implementing the HAL_CRYP_MspInit():
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| 19 | (##) Enable the CRYP interface clock using __HAL_RCC_CRYP_CLK_ENABLE()
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| 20 | (##) In case of using interrupts (e.g. HAL_CRYPEx_AESGCM_Encrypt_IT())
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| 21 | (+++) Configure the CRYP interrupt priority using HAL_NVIC_SetPriority()
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| 22 | (+++) Enable the CRYP IRQ handler using HAL_NVIC_EnableIRQ()
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| 23 | (+) In CRYP IRQ handler, call HAL_CRYP_IRQHandler()
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| 24 | (##) In case of using DMA to control data transfer (e.g. HAL_AES_ECB_Encrypt_DMA())
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| 25 | (+++) Enable the DMAx interface clock using __DMAx_CLK_ENABLE()
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| 26 | (+++) Configure and enable two DMA streams one for managing data transfer from
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| 27 | memory to peripheral (input stream) and another stream for managing data
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| 28 | transfer from peripheral to memory (output stream)
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| 29 | (+++) Associate the initialized DMA handle to the CRYP DMA handle
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| 30 | using __HAL_LINKDMA()
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| 31 | (+++) Configure the priority and enable the NVIC for the transfer complete
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| 32 | interrupt on the two DMA Streams. The output stream should have higher
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| 33 | priority than the input stream HAL_NVIC_SetPriority() and HAL_NVIC_EnableIRQ()
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| 34 | (#)Initialize the CRYP HAL using HAL_CRYP_Init(). This function configures mainly:
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| 35 | (##) The data type: 1-bit, 8-bit, 16-bit and 32-bit
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| 36 | (##) The key size: 128, 192 and 256. This parameter is relevant only for AES
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| 37 | (##) The encryption/decryption key. Its size depends on the algorithm
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| 38 | used for encryption/decryption
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| 39 | (##) The initialization vector (counter). It is not used ECB mode.
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| 40 | (#)Three processing (encryption/decryption) functions are available:
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| 41 | (##) Polling mode: encryption and decryption APIs are blocking functions
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| 42 | i.e. they process the data and wait till the processing is finished
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| 43 | e.g. HAL_CRYPEx_AESGCM_Encrypt()
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| 44 | (##) Interrupt mode: encryption and decryption APIs are not blocking functions
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| 45 | i.e. they process the data under interrupt
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| 46 | e.g. HAL_CRYPEx_AESGCM_Encrypt_IT()
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| 47 | (##) DMA mode: encryption and decryption APIs are not blocking functions
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| 48 | i.e. the data transfer is ensured by DMA
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| 49 | e.g. HAL_CRYPEx_AESGCM_Encrypt_DMA()
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| 50 | (#)When the processing function is called at first time after HAL_CRYP_Init()
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| 51 | the CRYP peripheral is initialized and processes the buffer in input.
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| 52 | At second call, the processing function performs an append of the already
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| 53 | processed buffer.
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| 54 | When a new data block is to be processed, call HAL_CRYP_Init() then the
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| 55 | processing function.
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| 56 | (#)In AES-GCM and AES-CCM modes are an authenticated encryption algorithms
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| 57 | which provide authentication messages.
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| 58 | HAL_AES_GCM_Finish() and HAL_AES_CCM_Finish() are used to provide those
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| 59 | authentication messages.
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| 60 | Call those functions after the processing ones (polling, interrupt or DMA).
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| 61 | e.g. in AES-CCM mode call HAL_CRYPEx_AESCCM_Encrypt() to encrypt the plain data
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| 62 | then call HAL_CRYPEx_AESCCM_Finish() to get the authentication message
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| 63 | @note: For CCM Encrypt/Decrypt API's, only DataType = 8-bit is supported by this version.
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| 64 | @note: The HAL_CRYPEx_AESGCM_xxxx() implementation is limited to 32bits inputs data length
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| 65 | (Plain/Cyphertext, Header) compared with GCM standards specifications (800-38D).
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| 66 | (#)Call HAL_CRYP_DeInit() to deinitialize the CRYP peripheral.
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| 67 |
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| 68 | @endverbatim
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| 69 | ******************************************************************************
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| 70 | * @attention
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| 71 | *
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| 72 | * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
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| 73 | *
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| 74 | * Redistribution and use in source and binary forms, with or without modification,
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| 75 | * are permitted provided that the following conditions are met:
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| 76 | * 1. Redistributions of source code must retain the above copyright notice,
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| 77 | * this list of conditions and the following disclaimer.
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| 78 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 79 | * this list of conditions and the following disclaimer in the documentation
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| 80 | * and/or other materials provided with the distribution.
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| 81 | * 3. Neither the name of STMicroelectronics nor the names of its contributors
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| 82 | * may be used to endorse or promote products derived from this software
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| 83 | * without specific prior written permission.
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| 84 | *
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| 85 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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| 86 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 87 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 88 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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| 89 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 90 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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| 91 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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| 92 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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| 93 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 94 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 95 | *
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| 96 | ******************************************************************************
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| 97 | */
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| 98 |
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| 99 | /* Includes ------------------------------------------------------------------*/
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| 100 | #include "stm32f4xx_hal.h"
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| 101 |
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| 102 | /** @addtogroup STM32F4xx_HAL_Driver
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| 103 | * @{
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| 104 | */
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| 105 |
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| 106 | /** @defgroup CRYPEx CRYPEx
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| 107 | * @brief CRYP Extension HAL module driver.
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| 108 | * @{
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| 109 | */
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| 110 |
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| 111 | #ifdef HAL_CRYP_MODULE_ENABLED
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| 112 |
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| 113 | #if defined(STM32F437xx) || defined(STM32F439xx) || defined(STM32F479xx)
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| 114 |
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| 115 | /* Private typedef -----------------------------------------------------------*/
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| 116 | /* Private define ------------------------------------------------------------*/
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| 117 | /** @addtogroup CRYPEx_Private_define
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| 118 | * @{
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| 119 | */
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| 120 | #define CRYPEx_TIMEOUT_VALUE 1
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| 121 | /**
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| 122 | * @}
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| 123 | */
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| 124 |
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| 125 | /* Private macro -------------------------------------------------------------*/
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| 126 | /* Private variables ---------------------------------------------------------*/
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| 127 | /* Private function prototypes -----------------------------------------------*/
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| 128 | /** @defgroup CRYPEx_Private_Functions_prototypes CRYP Private Functions Prototypes
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| 129 | * @{
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| 130 | */
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| 131 | static void CRYPEx_GCMCCM_SetInitVector(CRYP_HandleTypeDef *hcryp, uint8_t *InitVector);
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| 132 | static void CRYPEx_GCMCCM_SetKey(CRYP_HandleTypeDef *hcryp, uint8_t *Key, uint32_t KeySize);
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| 133 | static HAL_StatusTypeDef CRYPEx_GCMCCM_ProcessData(CRYP_HandleTypeDef *hcryp, uint8_t *Input, uint16_t Ilength, uint8_t *Output, uint32_t Timeout);
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| 134 | static HAL_StatusTypeDef CRYPEx_GCMCCM_SetHeaderPhase(CRYP_HandleTypeDef *hcryp, uint8_t* Input, uint16_t Ilength, uint32_t Timeout);
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| 135 | static void CRYPEx_GCMCCM_DMAInCplt(DMA_HandleTypeDef *hdma);
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| 136 | static void CRYPEx_GCMCCM_DMAOutCplt(DMA_HandleTypeDef *hdma);
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| 137 | static void CRYPEx_GCMCCM_DMAError(DMA_HandleTypeDef *hdma);
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| 138 | static void CRYPEx_GCMCCM_SetDMAConfig(CRYP_HandleTypeDef *hcryp, uint32_t inputaddr, uint16_t Size, uint32_t outputaddr);
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| 139 | /**
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| 140 | * @}
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| 141 | */
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| 142 |
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| 143 | /* Private functions ---------------------------------------------------------*/
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| 144 | /** @addtogroup CRYPEx_Private_Functions
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| 145 | * @{
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| 146 | */
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| 147 |
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| 148 | /**
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| 149 | * @brief DMA CRYP Input Data process complete callback.
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| 150 | * @param hdma: DMA handle
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| 151 | * @retval None
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| 152 | */
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| 153 | static void CRYPEx_GCMCCM_DMAInCplt(DMA_HandleTypeDef *hdma)
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| 154 | {
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| 155 | CRYP_HandleTypeDef* hcryp = ( CRYP_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
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| 156 |
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| 157 | /* Disable the DMA transfer for input Fifo request by resetting the DIEN bit
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| 158 | in the DMACR register */
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| 159 | hcryp->Instance->DMACR &= (uint32_t)(~CRYP_DMACR_DIEN);
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| 160 |
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| 161 | /* Call input data transfer complete callback */
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| 162 | HAL_CRYP_InCpltCallback(hcryp);
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| 163 | }
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| 164 |
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| 165 | /**
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| 166 | * @brief DMA CRYP Output Data process complete callback.
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| 167 | * @param hdma: DMA handle
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| 168 | * @retval None
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| 169 | */
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| 170 | static void CRYPEx_GCMCCM_DMAOutCplt(DMA_HandleTypeDef *hdma)
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| 171 | {
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| 172 | CRYP_HandleTypeDef* hcryp = ( CRYP_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
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| 173 |
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| 174 | /* Disable the DMA transfer for output Fifo request by resetting the DOEN bit
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| 175 | in the DMACR register */
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| 176 | hcryp->Instance->DMACR &= (uint32_t)(~CRYP_DMACR_DOEN);
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| 177 |
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| 178 | /* Enable the CRYP peripheral */
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| 179 | __HAL_CRYP_DISABLE(hcryp);
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| 180 |
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| 181 | /* Change the CRYP peripheral state */
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| 182 | hcryp->State = HAL_CRYP_STATE_READY;
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| 183 |
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| 184 | /* Call output data transfer complete callback */
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| 185 | HAL_CRYP_OutCpltCallback(hcryp);
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| 186 | }
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| 187 |
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| 188 | /**
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| 189 | * @brief DMA CRYP communication error callback.
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| 190 | * @param hdma: DMA handle
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| 191 | * @retval None
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| 192 | */
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| 193 | static void CRYPEx_GCMCCM_DMAError(DMA_HandleTypeDef *hdma)
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| 194 | {
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| 195 | CRYP_HandleTypeDef* hcryp = ( CRYP_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
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| 196 | hcryp->State= HAL_CRYP_STATE_READY;
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| 197 | HAL_CRYP_ErrorCallback(hcryp);
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| 198 | }
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| 199 |
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| 200 | /**
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| 201 | * @brief Writes the Key in Key registers.
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| 202 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
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| 203 | * the configuration information for CRYP module
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| 204 | * @param Key: Pointer to Key buffer
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| 205 | * @param KeySize: Size of Key
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| 206 | * @retval None
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| 207 | */
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| 208 | static void CRYPEx_GCMCCM_SetKey(CRYP_HandleTypeDef *hcryp, uint8_t *Key, uint32_t KeySize)
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| 209 | {
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| 210 | uint32_t keyaddr = (uint32_t)Key;
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| 211 |
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| 212 | switch(KeySize)
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| 213 | {
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| 214 | case CRYP_KEYSIZE_256B:
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| 215 | /* Key Initialisation */
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| 216 | hcryp->Instance->K0LR = __REV(*(uint32_t*)(keyaddr));
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| 217 | keyaddr+=4;
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| 218 | hcryp->Instance->K0RR = __REV(*(uint32_t*)(keyaddr));
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| 219 | keyaddr+=4;
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| 220 | hcryp->Instance->K1LR = __REV(*(uint32_t*)(keyaddr));
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| 221 | keyaddr+=4;
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| 222 | hcryp->Instance->K1RR = __REV(*(uint32_t*)(keyaddr));
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| 223 | keyaddr+=4;
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| 224 | hcryp->Instance->K2LR = __REV(*(uint32_t*)(keyaddr));
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| 225 | keyaddr+=4;
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| 226 | hcryp->Instance->K2RR = __REV(*(uint32_t*)(keyaddr));
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| 227 | keyaddr+=4;
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| 228 | hcryp->Instance->K3LR = __REV(*(uint32_t*)(keyaddr));
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| 229 | keyaddr+=4;
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| 230 | hcryp->Instance->K3RR = __REV(*(uint32_t*)(keyaddr));
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| 231 | break;
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| 232 | case CRYP_KEYSIZE_192B:
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| 233 | hcryp->Instance->K1LR = __REV(*(uint32_t*)(keyaddr));
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| 234 | keyaddr+=4;
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| 235 | hcryp->Instance->K1RR = __REV(*(uint32_t*)(keyaddr));
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| 236 | keyaddr+=4;
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| 237 | hcryp->Instance->K2LR = __REV(*(uint32_t*)(keyaddr));
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| 238 | keyaddr+=4;
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| 239 | hcryp->Instance->K2RR = __REV(*(uint32_t*)(keyaddr));
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| 240 | keyaddr+=4;
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| 241 | hcryp->Instance->K3LR = __REV(*(uint32_t*)(keyaddr));
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| 242 | keyaddr+=4;
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| 243 | hcryp->Instance->K3RR = __REV(*(uint32_t*)(keyaddr));
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| 244 | break;
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| 245 | case CRYP_KEYSIZE_128B:
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| 246 | hcryp->Instance->K2LR = __REV(*(uint32_t*)(keyaddr));
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| 247 | keyaddr+=4;
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| 248 | hcryp->Instance->K2RR = __REV(*(uint32_t*)(keyaddr));
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| 249 | keyaddr+=4;
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| 250 | hcryp->Instance->K3LR = __REV(*(uint32_t*)(keyaddr));
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| 251 | keyaddr+=4;
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| 252 | hcryp->Instance->K3RR = __REV(*(uint32_t*)(keyaddr));
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| 253 | break;
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| 254 | default:
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| 255 | break;
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| 256 | }
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| 257 | }
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| 258 |
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| 259 | /**
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| 260 | * @brief Writes the InitVector/InitCounter in IV registers.
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| 261 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
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| 262 | * the configuration information for CRYP module
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| 263 | * @param InitVector: Pointer to InitVector/InitCounter buffer
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| 264 | * @retval None
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| 265 | */
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| 266 | static void CRYPEx_GCMCCM_SetInitVector(CRYP_HandleTypeDef *hcryp, uint8_t *InitVector)
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| 267 | {
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| 268 | uint32_t ivaddr = (uint32_t)InitVector;
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| 269 |
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| 270 | hcryp->Instance->IV0LR = __REV(*(uint32_t*)(ivaddr));
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| 271 | ivaddr+=4;
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| 272 | hcryp->Instance->IV0RR = __REV(*(uint32_t*)(ivaddr));
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| 273 | ivaddr+=4;
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| 274 | hcryp->Instance->IV1LR = __REV(*(uint32_t*)(ivaddr));
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| 275 | ivaddr+=4;
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| 276 | hcryp->Instance->IV1RR = __REV(*(uint32_t*)(ivaddr));
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| 277 | }
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| 278 |
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| 279 | /**
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| 280 | * @brief Process Data: Writes Input data in polling mode and read the Output data.
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| 281 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
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| 282 | * the configuration information for CRYP module
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| 283 | * @param Input: Pointer to the Input buffer.
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| 284 | * @param Ilength: Length of the Input buffer, must be a multiple of 16
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| 285 | * @param Output: Pointer to the returned buffer
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| 286 | * @param Timeout: Timeout value
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| 287 | * @retval None
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| 288 | */
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| 289 | static HAL_StatusTypeDef CRYPEx_GCMCCM_ProcessData(CRYP_HandleTypeDef *hcryp, uint8_t *Input, uint16_t Ilength, uint8_t *Output, uint32_t Timeout)
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| 290 | {
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| 291 | uint32_t tickstart = 0;
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| 292 | uint32_t i = 0;
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| 293 | uint32_t inputaddr = (uint32_t)Input;
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| 294 | uint32_t outputaddr = (uint32_t)Output;
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| 295 |
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| 296 | for(i=0; (i < Ilength); i+=16)
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| 297 | {
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| 298 | /* Write the Input block in the IN FIFO */
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| 299 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
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| 300 | inputaddr+=4;
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| 301 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
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| 302 | inputaddr+=4;
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| 303 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
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| 304 | inputaddr+=4;
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| 305 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
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| 306 | inputaddr+=4;
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| 307 |
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| 308 | /* Get tick */
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| 309 | tickstart = HAL_GetTick();
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| 310 |
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| 311 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_OFNE))
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| 312 | {
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| 313 | /* Check for the Timeout */
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| 314 | if(Timeout != HAL_MAX_DELAY)
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| 315 | {
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| 316 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
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| 317 | {
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| 318 | /* Change state */
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| 319 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
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| 320 |
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| 321 | /* Process Unlocked */
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| 322 | __HAL_UNLOCK(hcryp);
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| 323 |
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| 324 | return HAL_TIMEOUT;
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| 325 | }
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| 326 | }
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| 327 | }
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| 328 | /* Read the Output block from the OUT FIFO */
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| 329 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
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| 330 | outputaddr+=4;
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| 331 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
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| 332 | outputaddr+=4;
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| 333 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
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| 334 | outputaddr+=4;
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| 335 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
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| 336 | outputaddr+=4;
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| 337 | }
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| 338 | /* Return function status */
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| 339 | return HAL_OK;
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| 340 | }
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| 341 |
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| 342 | /**
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| 343 | * @brief Sets the header phase
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| 344 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
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| 345 | * the configuration information for CRYP module
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| 346 | * @param Input: Pointer to the Input buffer.
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| 347 | * @param Ilength: Length of the Input buffer, must be a multiple of 16
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| 348 | * @param Timeout: Timeout value
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| 349 | * @retval None
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| 350 | */
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| 351 | static HAL_StatusTypeDef CRYPEx_GCMCCM_SetHeaderPhase(CRYP_HandleTypeDef *hcryp, uint8_t* Input, uint16_t Ilength, uint32_t Timeout)
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| 352 | {
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| 353 | uint32_t tickstart = 0;
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| 354 | uint32_t loopcounter = 0;
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| 355 | uint32_t headeraddr = (uint32_t)Input;
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| 356 |
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| 357 | /***************************** Header phase *********************************/
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| 358 | if(hcryp->Init.HeaderSize != 0)
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| 359 | {
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| 360 | /* Select header phase */
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| 361 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_HEADER);
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| 362 | /* Enable the CRYP peripheral */
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| 363 | __HAL_CRYP_ENABLE(hcryp);
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| 364 |
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| 365 | for(loopcounter = 0; (loopcounter < hcryp->Init.HeaderSize); loopcounter+=16)
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| 366 | {
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| 367 | /* Get tick */
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| 368 | tickstart = HAL_GetTick();
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| 369 |
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| 370 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_IFEM))
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| 371 | {
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| 372 | /* Check for the Timeout */
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| 373 | if(Timeout != HAL_MAX_DELAY)
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| 374 | {
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| 375 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
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| 376 | {
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| 377 | /* Change state */
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| 378 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 379 |
|
---|
| 380 | /* Process Unlocked */
|
---|
| 381 | __HAL_UNLOCK(hcryp);
|
---|
| 382 |
|
---|
| 383 | return HAL_TIMEOUT;
|
---|
| 384 | }
|
---|
| 385 | }
|
---|
| 386 | }
|
---|
| 387 | /* Write the Input block in the IN FIFO */
|
---|
| 388 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 389 | headeraddr+=4;
|
---|
| 390 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 391 | headeraddr+=4;
|
---|
| 392 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 393 | headeraddr+=4;
|
---|
| 394 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 395 | headeraddr+=4;
|
---|
| 396 | }
|
---|
| 397 |
|
---|
| 398 | /* Wait until the complete message has been processed */
|
---|
| 399 |
|
---|
| 400 | /* Get tick */
|
---|
| 401 | tickstart = HAL_GetTick();
|
---|
| 402 |
|
---|
| 403 | while((hcryp->Instance->SR & CRYP_FLAG_BUSY) == CRYP_FLAG_BUSY)
|
---|
| 404 | {
|
---|
| 405 | /* Check for the Timeout */
|
---|
| 406 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 407 | {
|
---|
| 408 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 409 | {
|
---|
| 410 | /* Change state */
|
---|
| 411 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 412 |
|
---|
| 413 | /* Process Unlocked */
|
---|
| 414 | __HAL_UNLOCK(hcryp);
|
---|
| 415 |
|
---|
| 416 | return HAL_TIMEOUT;
|
---|
| 417 | }
|
---|
| 418 | }
|
---|
| 419 | }
|
---|
| 420 | }
|
---|
| 421 | /* Return function status */
|
---|
| 422 | return HAL_OK;
|
---|
| 423 | }
|
---|
| 424 |
|
---|
| 425 | /**
|
---|
| 426 | * @brief Sets the DMA configuration and start the DMA transfer.
|
---|
| 427 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 428 | * the configuration information for CRYP module
|
---|
| 429 | * @param inputaddr: Address of the Input buffer
|
---|
| 430 | * @param Size: Size of the Input buffer, must be a multiple of 16
|
---|
| 431 | * @param outputaddr: Address of the Output buffer
|
---|
| 432 | * @retval None
|
---|
| 433 | */
|
---|
| 434 | static void CRYPEx_GCMCCM_SetDMAConfig(CRYP_HandleTypeDef *hcryp, uint32_t inputaddr, uint16_t Size, uint32_t outputaddr)
|
---|
| 435 | {
|
---|
| 436 | /* Set the CRYP DMA transfer complete callback */
|
---|
| 437 | hcryp->hdmain->XferCpltCallback = CRYPEx_GCMCCM_DMAInCplt;
|
---|
| 438 | /* Set the DMA error callback */
|
---|
| 439 | hcryp->hdmain->XferErrorCallback = CRYPEx_GCMCCM_DMAError;
|
---|
| 440 |
|
---|
| 441 | /* Set the CRYP DMA transfer complete callback */
|
---|
| 442 | hcryp->hdmaout->XferCpltCallback = CRYPEx_GCMCCM_DMAOutCplt;
|
---|
| 443 | /* Set the DMA error callback */
|
---|
| 444 | hcryp->hdmaout->XferErrorCallback = CRYPEx_GCMCCM_DMAError;
|
---|
| 445 |
|
---|
| 446 | /* Enable the CRYP peripheral */
|
---|
| 447 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 448 |
|
---|
| 449 | /* Enable the DMA In DMA Stream */
|
---|
| 450 | HAL_DMA_Start_IT(hcryp->hdmain, inputaddr, (uint32_t)&hcryp->Instance->DR, Size/4);
|
---|
| 451 |
|
---|
| 452 | /* Enable In DMA request */
|
---|
| 453 | hcryp->Instance->DMACR = CRYP_DMACR_DIEN;
|
---|
| 454 |
|
---|
| 455 | /* Enable the DMA Out DMA Stream */
|
---|
| 456 | HAL_DMA_Start_IT(hcryp->hdmaout, (uint32_t)&hcryp->Instance->DOUT, outputaddr, Size/4);
|
---|
| 457 |
|
---|
| 458 | /* Enable Out DMA request */
|
---|
| 459 | hcryp->Instance->DMACR |= CRYP_DMACR_DOEN;
|
---|
| 460 | }
|
---|
| 461 |
|
---|
| 462 | /**
|
---|
| 463 | * @}
|
---|
| 464 | */
|
---|
| 465 |
|
---|
| 466 | /* Exported functions---------------------------------------------------------*/
|
---|
| 467 | /** @addtogroup CRYPEx_Exported_Functions
|
---|
| 468 | * @{
|
---|
| 469 | */
|
---|
| 470 |
|
---|
| 471 | /** @defgroup CRYPEx_Exported_Functions_Group1 Extended AES processing functions
|
---|
| 472 | * @brief Extended processing functions.
|
---|
| 473 | *
|
---|
| 474 | @verbatim
|
---|
| 475 | ==============================================================================
|
---|
| 476 | ##### Extended AES processing functions #####
|
---|
| 477 | ==============================================================================
|
---|
| 478 | [..] This section provides functions allowing to:
|
---|
| 479 | (+) Encrypt plaintext using AES-128/192/256 using GCM and CCM chaining modes
|
---|
| 480 | (+) Decrypt cyphertext using AES-128/192/256 using GCM and CCM chaining modes
|
---|
| 481 | (+) Finish the processing. This function is available only for GCM and CCM
|
---|
| 482 | [..] Three processing methods are available:
|
---|
| 483 | (+) Polling mode
|
---|
| 484 | (+) Interrupt mode
|
---|
| 485 | (+) DMA mode
|
---|
| 486 |
|
---|
| 487 | @endverbatim
|
---|
| 488 | * @{
|
---|
| 489 | */
|
---|
| 490 |
|
---|
| 491 |
|
---|
| 492 | /**
|
---|
| 493 | * @brief Initializes the CRYP peripheral in AES CCM encryption mode then
|
---|
| 494 | * encrypt pPlainData. The cypher data are available in pCypherData.
|
---|
| 495 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 496 | * the configuration information for CRYP module
|
---|
| 497 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 498 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 499 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 500 | * @param Timeout: Timeout duration
|
---|
| 501 | * @retval HAL status
|
---|
| 502 | */
|
---|
| 503 | HAL_StatusTypeDef HAL_CRYPEx_AESCCM_Encrypt(CRYP_HandleTypeDef *hcryp, uint8_t *pPlainData, uint16_t Size, uint8_t *pCypherData, uint32_t Timeout)
|
---|
| 504 | {
|
---|
| 505 | uint32_t tickstart = 0;
|
---|
| 506 | uint32_t headersize = hcryp->Init.HeaderSize;
|
---|
| 507 | uint32_t headeraddr = (uint32_t)hcryp->Init.Header;
|
---|
| 508 | uint32_t loopcounter = 0;
|
---|
| 509 | uint32_t bufferidx = 0;
|
---|
| 510 | uint8_t blockb0[16] = {0};/* Block B0 */
|
---|
| 511 | uint8_t ctr[16] = {0}; /* Counter */
|
---|
| 512 | uint32_t b0addr = (uint32_t)blockb0;
|
---|
| 513 |
|
---|
| 514 | /* Process Locked */
|
---|
| 515 | __HAL_LOCK(hcryp);
|
---|
| 516 |
|
---|
| 517 | /* Change the CRYP peripheral state */
|
---|
| 518 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 519 |
|
---|
| 520 | /* Check if initialization phase has already been performed */
|
---|
| 521 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 522 | {
|
---|
| 523 | /************************ Formatting the header block *********************/
|
---|
| 524 | if(headersize != 0)
|
---|
| 525 | {
|
---|
| 526 | /* Check that the associated data (or header) length is lower than 2^16 - 2^8 = 65536 - 256 = 65280 */
|
---|
| 527 | if(headersize < 65280)
|
---|
| 528 | {
|
---|
| 529 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize >> 8) & 0xFF);
|
---|
| 530 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize) & 0xFF);
|
---|
| 531 | headersize += 2;
|
---|
| 532 | }
|
---|
| 533 | else
|
---|
| 534 | {
|
---|
| 535 | /* Header is encoded as 0xff || 0xfe || [headersize]32, i.e., six octets */
|
---|
| 536 | hcryp->Init.pScratch[bufferidx++] = 0xFF;
|
---|
| 537 | hcryp->Init.pScratch[bufferidx++] = 0xFE;
|
---|
| 538 | hcryp->Init.pScratch[bufferidx++] = headersize & 0xff000000;
|
---|
| 539 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x00ff0000;
|
---|
| 540 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x0000ff00;
|
---|
| 541 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x000000ff;
|
---|
| 542 | headersize += 6;
|
---|
| 543 | }
|
---|
| 544 | /* Copy the header buffer in internal buffer "hcryp->Init.pScratch" */
|
---|
| 545 | for(loopcounter = 0; loopcounter < headersize; loopcounter++)
|
---|
| 546 | {
|
---|
| 547 | hcryp->Init.pScratch[bufferidx++] = hcryp->Init.Header[loopcounter];
|
---|
| 548 | }
|
---|
| 549 | /* Check if the header size is modulo 16 */
|
---|
| 550 | if ((headersize % 16) != 0)
|
---|
| 551 | {
|
---|
| 552 | /* Padd the header buffer with 0s till the hcryp->Init.pScratch length is modulo 16 */
|
---|
| 553 | for(loopcounter = headersize; loopcounter <= ((headersize/16) + 1) * 16; loopcounter++)
|
---|
| 554 | {
|
---|
| 555 | hcryp->Init.pScratch[loopcounter] = 0;
|
---|
| 556 | }
|
---|
| 557 | /* Set the header size to modulo 16 */
|
---|
| 558 | headersize = ((headersize/16) + 1) * 16;
|
---|
| 559 | }
|
---|
| 560 | /* Set the pointer headeraddr to hcryp->Init.pScratch */
|
---|
| 561 | headeraddr = (uint32_t)hcryp->Init.pScratch;
|
---|
| 562 | }
|
---|
| 563 | /*********************** Formatting the block B0 **************************/
|
---|
| 564 | if(headersize != 0)
|
---|
| 565 | {
|
---|
| 566 | blockb0[0] = 0x40;
|
---|
| 567 | }
|
---|
| 568 | /* Flags byte */
|
---|
| 569 | /* blockb0[0] |= 0u | (((( (uint8_t) hcryp->Init.TagSize - 2) / 2) & 0x07 ) << 3 ) | ( ( (uint8_t) (15 - hcryp->Init.IVSize) - 1) & 0x07) */
|
---|
| 570 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)(((uint8_t)(hcryp->Init.TagSize - (uint8_t)(2))) >> 1) & (uint8_t)0x07 ) << 3);
|
---|
| 571 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)((uint8_t)(15) - hcryp->Init.IVSize) - (uint8_t)1) & (uint8_t)0x07);
|
---|
| 572 |
|
---|
| 573 | for (loopcounter = 0; loopcounter < hcryp->Init.IVSize; loopcounter++)
|
---|
| 574 | {
|
---|
| 575 | blockb0[loopcounter+1] = hcryp->Init.pInitVect[loopcounter];
|
---|
| 576 | }
|
---|
| 577 | for ( ; loopcounter < 13; loopcounter++)
|
---|
| 578 | {
|
---|
| 579 | blockb0[loopcounter+1] = 0;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | blockb0[14] = (Size >> 8);
|
---|
| 583 | blockb0[15] = (Size & 0xFF);
|
---|
| 584 |
|
---|
| 585 | /************************* Formatting the initial counter *****************/
|
---|
| 586 | /* Byte 0:
|
---|
| 587 | Bits 7 and 6 are reserved and shall be set to 0
|
---|
| 588 | Bits 3, 4, and 5 shall also be set to 0, to ensure that all the counter blocks
|
---|
| 589 | are distinct from B0
|
---|
| 590 | Bits 0, 1, and 2 contain the same encoding of q as in B0
|
---|
| 591 | */
|
---|
| 592 | ctr[0] = blockb0[0] & 0x07;
|
---|
| 593 | /* byte 1 to NonceSize is the IV (Nonce) */
|
---|
| 594 | for(loopcounter = 1; loopcounter < hcryp->Init.IVSize + 1; loopcounter++)
|
---|
| 595 | {
|
---|
| 596 | ctr[loopcounter] = blockb0[loopcounter];
|
---|
| 597 | }
|
---|
| 598 | /* Set the LSB to 1 */
|
---|
| 599 | ctr[15] |= 0x01;
|
---|
| 600 |
|
---|
| 601 | /* Set the key */
|
---|
| 602 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 603 |
|
---|
| 604 | /* Set the CRYP peripheral in AES CCM mode */
|
---|
| 605 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_CCM_ENCRYPT);
|
---|
| 606 |
|
---|
| 607 | /* Set the Initialization Vector */
|
---|
| 608 | CRYPEx_GCMCCM_SetInitVector(hcryp, ctr);
|
---|
| 609 |
|
---|
| 610 | /* Select init phase */
|
---|
| 611 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_INIT);
|
---|
| 612 |
|
---|
| 613 | b0addr = (uint32_t)blockb0;
|
---|
| 614 | /* Write the blockb0 block in the IN FIFO */
|
---|
| 615 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 616 | b0addr+=4;
|
---|
| 617 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 618 | b0addr+=4;
|
---|
| 619 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 620 | b0addr+=4;
|
---|
| 621 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 622 |
|
---|
| 623 | /* Enable the CRYP peripheral */
|
---|
| 624 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 625 |
|
---|
| 626 | /* Get tick */
|
---|
| 627 | tickstart = HAL_GetTick();
|
---|
| 628 |
|
---|
| 629 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 630 | {
|
---|
| 631 | /* Check for the Timeout */
|
---|
| 632 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 633 | {
|
---|
| 634 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 635 | {
|
---|
| 636 | /* Change state */
|
---|
| 637 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 638 |
|
---|
| 639 | /* Process Unlocked */
|
---|
| 640 | __HAL_UNLOCK(hcryp);
|
---|
| 641 |
|
---|
| 642 | return HAL_TIMEOUT;
|
---|
| 643 | }
|
---|
| 644 | }
|
---|
| 645 | }
|
---|
| 646 | /***************************** Header phase *******************************/
|
---|
| 647 | if(headersize != 0)
|
---|
| 648 | {
|
---|
| 649 | /* Select header phase */
|
---|
| 650 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_HEADER);
|
---|
| 651 |
|
---|
| 652 | /* Enable the CRYP peripheral */
|
---|
| 653 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 654 |
|
---|
| 655 | for(loopcounter = 0; (loopcounter < headersize); loopcounter+=16)
|
---|
| 656 | {
|
---|
| 657 | /* Get tick */
|
---|
| 658 | tickstart = HAL_GetTick();
|
---|
| 659 |
|
---|
| 660 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_IFEM))
|
---|
| 661 | {
|
---|
| 662 | {
|
---|
| 663 | /* Check for the Timeout */
|
---|
| 664 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 665 | {
|
---|
| 666 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 667 | {
|
---|
| 668 | /* Change state */
|
---|
| 669 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 670 |
|
---|
| 671 | /* Process Unlocked */
|
---|
| 672 | __HAL_UNLOCK(hcryp);
|
---|
| 673 |
|
---|
| 674 | return HAL_TIMEOUT;
|
---|
| 675 | }
|
---|
| 676 | }
|
---|
| 677 | }
|
---|
| 678 | }
|
---|
| 679 | /* Write the header block in the IN FIFO */
|
---|
| 680 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 681 | headeraddr+=4;
|
---|
| 682 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 683 | headeraddr+=4;
|
---|
| 684 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 685 | headeraddr+=4;
|
---|
| 686 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 687 | headeraddr+=4;
|
---|
| 688 | }
|
---|
| 689 |
|
---|
| 690 | /* Get tick */
|
---|
| 691 | tickstart = HAL_GetTick();
|
---|
| 692 |
|
---|
| 693 | while((hcryp->Instance->SR & CRYP_FLAG_BUSY) == CRYP_FLAG_BUSY)
|
---|
| 694 | {
|
---|
| 695 | /* Check for the Timeout */
|
---|
| 696 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 697 | {
|
---|
| 698 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 699 | {
|
---|
| 700 | /* Change state */
|
---|
| 701 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 702 |
|
---|
| 703 | /* Process Unlocked */
|
---|
| 704 | __HAL_UNLOCK(hcryp);
|
---|
| 705 |
|
---|
| 706 | return HAL_TIMEOUT;
|
---|
| 707 | }
|
---|
| 708 | }
|
---|
| 709 | }
|
---|
| 710 | }
|
---|
| 711 | /* Save formatted counter into the scratch buffer pScratch */
|
---|
| 712 | for(loopcounter = 0; (loopcounter < 16); loopcounter++)
|
---|
| 713 | {
|
---|
| 714 | hcryp->Init.pScratch[loopcounter] = ctr[loopcounter];
|
---|
| 715 | }
|
---|
| 716 | /* Reset bit 0 */
|
---|
| 717 | hcryp->Init.pScratch[15] &= 0xfe;
|
---|
| 718 |
|
---|
| 719 | /* Select payload phase once the header phase is performed */
|
---|
| 720 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 721 |
|
---|
| 722 | /* Flush FIFO */
|
---|
| 723 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 724 |
|
---|
| 725 | /* Enable the CRYP peripheral */
|
---|
| 726 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 727 |
|
---|
| 728 | /* Set the phase */
|
---|
| 729 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 730 | }
|
---|
| 731 |
|
---|
| 732 | /* Write Plain Data and Get Cypher Data */
|
---|
| 733 | if(CRYPEx_GCMCCM_ProcessData(hcryp,pPlainData, Size, pCypherData, Timeout) != HAL_OK)
|
---|
| 734 | {
|
---|
| 735 | return HAL_TIMEOUT;
|
---|
| 736 | }
|
---|
| 737 |
|
---|
| 738 | /* Change the CRYP peripheral state */
|
---|
| 739 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 740 |
|
---|
| 741 | /* Process Unlocked */
|
---|
| 742 | __HAL_UNLOCK(hcryp);
|
---|
| 743 |
|
---|
| 744 | /* Return function status */
|
---|
| 745 | return HAL_OK;
|
---|
| 746 | }
|
---|
| 747 |
|
---|
| 748 | /**
|
---|
| 749 | * @brief Initializes the CRYP peripheral in AES GCM encryption mode then
|
---|
| 750 | * encrypt pPlainData. The cypher data are available in pCypherData.
|
---|
| 751 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 752 | * the configuration information for CRYP module
|
---|
| 753 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 754 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 755 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 756 | * @param Timeout: Timeout duration
|
---|
| 757 | * @retval HAL status
|
---|
| 758 | */
|
---|
| 759 | HAL_StatusTypeDef HAL_CRYPEx_AESGCM_Encrypt(CRYP_HandleTypeDef *hcryp, uint8_t *pPlainData, uint16_t Size, uint8_t *pCypherData, uint32_t Timeout)
|
---|
| 760 | {
|
---|
| 761 | uint32_t tickstart = 0;
|
---|
| 762 |
|
---|
| 763 | /* Process Locked */
|
---|
| 764 | __HAL_LOCK(hcryp);
|
---|
| 765 |
|
---|
| 766 | /* Change the CRYP peripheral state */
|
---|
| 767 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 768 |
|
---|
| 769 | /* Check if initialization phase has already been performed */
|
---|
| 770 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 771 | {
|
---|
| 772 | /* Set the key */
|
---|
| 773 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 774 |
|
---|
| 775 | /* Set the CRYP peripheral in AES GCM mode */
|
---|
| 776 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_GCM_ENCRYPT);
|
---|
| 777 |
|
---|
| 778 | /* Set the Initialization Vector */
|
---|
| 779 | CRYPEx_GCMCCM_SetInitVector(hcryp, hcryp->Init.pInitVect);
|
---|
| 780 |
|
---|
| 781 | /* Flush FIFO */
|
---|
| 782 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 783 |
|
---|
| 784 | /* Enable the CRYP peripheral */
|
---|
| 785 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 786 |
|
---|
| 787 | /* Get tick */
|
---|
| 788 | tickstart = HAL_GetTick();
|
---|
| 789 |
|
---|
| 790 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 791 | {
|
---|
| 792 | /* Check for the Timeout */
|
---|
| 793 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 794 | {
|
---|
| 795 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 796 | {
|
---|
| 797 | /* Change state */
|
---|
| 798 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 799 |
|
---|
| 800 | /* Process Unlocked */
|
---|
| 801 | __HAL_UNLOCK(hcryp);
|
---|
| 802 |
|
---|
| 803 | return HAL_TIMEOUT;
|
---|
| 804 | }
|
---|
| 805 | }
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | /* Set the header phase */
|
---|
| 809 | if(CRYPEx_GCMCCM_SetHeaderPhase(hcryp, hcryp->Init.Header, hcryp->Init.HeaderSize, Timeout) != HAL_OK)
|
---|
| 810 | {
|
---|
| 811 | return HAL_TIMEOUT;
|
---|
| 812 | }
|
---|
| 813 |
|
---|
| 814 | /* Disable the CRYP peripheral */
|
---|
| 815 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 816 |
|
---|
| 817 | /* Select payload phase once the header phase is performed */
|
---|
| 818 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 819 |
|
---|
| 820 | /* Flush FIFO */
|
---|
| 821 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 822 |
|
---|
| 823 | /* Enable the CRYP peripheral */
|
---|
| 824 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 825 |
|
---|
| 826 | /* Set the phase */
|
---|
| 827 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 828 | }
|
---|
| 829 |
|
---|
| 830 | /* Write Plain Data and Get Cypher Data */
|
---|
| 831 | if(CRYPEx_GCMCCM_ProcessData(hcryp, pPlainData, Size, pCypherData, Timeout) != HAL_OK)
|
---|
| 832 | {
|
---|
| 833 | return HAL_TIMEOUT;
|
---|
| 834 | }
|
---|
| 835 |
|
---|
| 836 | /* Change the CRYP peripheral state */
|
---|
| 837 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 838 |
|
---|
| 839 | /* Process Unlocked */
|
---|
| 840 | __HAL_UNLOCK(hcryp);
|
---|
| 841 |
|
---|
| 842 | /* Return function status */
|
---|
| 843 | return HAL_OK;
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | /**
|
---|
| 847 | * @brief Initializes the CRYP peripheral in AES GCM decryption mode then
|
---|
| 848 | * decrypted pCypherData. The cypher data are available in pPlainData.
|
---|
| 849 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 850 | * the configuration information for CRYP module
|
---|
| 851 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 852 | * @param Size: Length of the cyphertext buffer, must be a multiple of 16
|
---|
| 853 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 854 | * @param Timeout: Timeout duration
|
---|
| 855 | * @retval HAL status
|
---|
| 856 | */
|
---|
| 857 | HAL_StatusTypeDef HAL_CRYPEx_AESGCM_Decrypt(CRYP_HandleTypeDef *hcryp, uint8_t *pCypherData, uint16_t Size, uint8_t *pPlainData, uint32_t Timeout)
|
---|
| 858 | {
|
---|
| 859 | uint32_t tickstart = 0;
|
---|
| 860 |
|
---|
| 861 | /* Process Locked */
|
---|
| 862 | __HAL_LOCK(hcryp);
|
---|
| 863 |
|
---|
| 864 | /* Change the CRYP peripheral state */
|
---|
| 865 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 866 |
|
---|
| 867 | /* Check if initialization phase has already been performed */
|
---|
| 868 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 869 | {
|
---|
| 870 | /* Set the key */
|
---|
| 871 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 872 |
|
---|
| 873 | /* Set the CRYP peripheral in AES GCM decryption mode */
|
---|
| 874 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_GCM_DECRYPT);
|
---|
| 875 |
|
---|
| 876 | /* Set the Initialization Vector */
|
---|
| 877 | CRYPEx_GCMCCM_SetInitVector(hcryp, hcryp->Init.pInitVect);
|
---|
| 878 |
|
---|
| 879 | /* Flush FIFO */
|
---|
| 880 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 881 |
|
---|
| 882 | /* Enable the CRYP peripheral */
|
---|
| 883 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 884 |
|
---|
| 885 | /* Get tick */
|
---|
| 886 | tickstart = HAL_GetTick();
|
---|
| 887 |
|
---|
| 888 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 889 | {
|
---|
| 890 | /* Check for the Timeout */
|
---|
| 891 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 892 | {
|
---|
| 893 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 894 | {
|
---|
| 895 | /* Change state */
|
---|
| 896 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 897 |
|
---|
| 898 | /* Process Unlocked */
|
---|
| 899 | __HAL_UNLOCK(hcryp);
|
---|
| 900 |
|
---|
| 901 | return HAL_TIMEOUT;
|
---|
| 902 | }
|
---|
| 903 | }
|
---|
| 904 | }
|
---|
| 905 |
|
---|
| 906 | /* Set the header phase */
|
---|
| 907 | if(CRYPEx_GCMCCM_SetHeaderPhase(hcryp, hcryp->Init.Header, hcryp->Init.HeaderSize, Timeout) != HAL_OK)
|
---|
| 908 | {
|
---|
| 909 | return HAL_TIMEOUT;
|
---|
| 910 | }
|
---|
| 911 | /* Disable the CRYP peripheral */
|
---|
| 912 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 913 |
|
---|
| 914 | /* Select payload phase once the header phase is performed */
|
---|
| 915 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 916 |
|
---|
| 917 | /* Enable the CRYP peripheral */
|
---|
| 918 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 919 |
|
---|
| 920 | /* Set the phase */
|
---|
| 921 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 922 | }
|
---|
| 923 |
|
---|
| 924 | /* Write Plain Data and Get Cypher Data */
|
---|
| 925 | if(CRYPEx_GCMCCM_ProcessData(hcryp, pCypherData, Size, pPlainData, Timeout) != HAL_OK)
|
---|
| 926 | {
|
---|
| 927 | return HAL_TIMEOUT;
|
---|
| 928 | }
|
---|
| 929 |
|
---|
| 930 | /* Change the CRYP peripheral state */
|
---|
| 931 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 932 |
|
---|
| 933 | /* Process Unlocked */
|
---|
| 934 | __HAL_UNLOCK(hcryp);
|
---|
| 935 |
|
---|
| 936 | /* Return function status */
|
---|
| 937 | return HAL_OK;
|
---|
| 938 | }
|
---|
| 939 |
|
---|
| 940 | /**
|
---|
| 941 | * @brief Computes the authentication TAG.
|
---|
| 942 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 943 | * the configuration information for CRYP module
|
---|
| 944 | * @param Size: Total length of the plain/cyphertext buffer
|
---|
| 945 | * @param AuthTag: Pointer to the authentication buffer
|
---|
| 946 | * @param Timeout: Timeout duration
|
---|
| 947 | * @retval HAL status
|
---|
| 948 | */
|
---|
| 949 | HAL_StatusTypeDef HAL_CRYPEx_AESGCM_Finish(CRYP_HandleTypeDef *hcryp, uint32_t Size, uint8_t *AuthTag, uint32_t Timeout)
|
---|
| 950 | {
|
---|
| 951 | uint32_t tickstart = 0;
|
---|
| 952 | uint64_t headerlength = hcryp->Init.HeaderSize * 8; /* Header length in bits */
|
---|
| 953 | uint64_t inputlength = Size * 8; /* input length in bits */
|
---|
| 954 | uint32_t tagaddr = (uint32_t)AuthTag;
|
---|
| 955 |
|
---|
| 956 | /* Process Locked */
|
---|
| 957 | __HAL_LOCK(hcryp);
|
---|
| 958 |
|
---|
| 959 | /* Change the CRYP peripheral state */
|
---|
| 960 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 961 |
|
---|
| 962 | /* Check if initialization phase has already been performed */
|
---|
| 963 | if(hcryp->Phase == HAL_CRYP_PHASE_PROCESS)
|
---|
| 964 | {
|
---|
| 965 | /* Change the CRYP phase */
|
---|
| 966 | hcryp->Phase = HAL_CRYP_PHASE_FINAL;
|
---|
| 967 |
|
---|
| 968 | /* Disable CRYP to start the final phase */
|
---|
| 969 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 970 |
|
---|
| 971 | /* Select final phase */
|
---|
| 972 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_FINAL);
|
---|
| 973 |
|
---|
| 974 | /* Enable the CRYP peripheral */
|
---|
| 975 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 976 |
|
---|
| 977 | /* Write the number of bits in header (64 bits) followed by the number of bits
|
---|
| 978 | in the payload */
|
---|
| 979 | if(hcryp->Init.DataType == CRYP_DATATYPE_1B)
|
---|
| 980 | {
|
---|
| 981 | hcryp->Instance->DR = __RBIT(headerlength >> 32);
|
---|
| 982 | hcryp->Instance->DR = __RBIT(headerlength);
|
---|
| 983 | hcryp->Instance->DR = __RBIT(inputlength >> 32);
|
---|
| 984 | hcryp->Instance->DR = __RBIT(inputlength);
|
---|
| 985 | }
|
---|
| 986 | else if(hcryp->Init.DataType == CRYP_DATATYPE_8B)
|
---|
| 987 | {
|
---|
| 988 | hcryp->Instance->DR = __REV(headerlength >> 32);
|
---|
| 989 | hcryp->Instance->DR = __REV(headerlength);
|
---|
| 990 | hcryp->Instance->DR = __REV(inputlength >> 32);
|
---|
| 991 | hcryp->Instance->DR = __REV(inputlength);
|
---|
| 992 | }
|
---|
| 993 | else if(hcryp->Init.DataType == CRYP_DATATYPE_16B)
|
---|
| 994 | {
|
---|
| 995 | hcryp->Instance->DR = __ROR((uint32_t)(headerlength >> 32), 16);
|
---|
| 996 | hcryp->Instance->DR = __ROR((uint32_t)headerlength, 16);
|
---|
| 997 | hcryp->Instance->DR = __ROR((uint32_t)(inputlength >> 32), 16);
|
---|
| 998 | hcryp->Instance->DR = __ROR((uint32_t)inputlength, 16);
|
---|
| 999 | }
|
---|
| 1000 | else if(hcryp->Init.DataType == CRYP_DATATYPE_32B)
|
---|
| 1001 | {
|
---|
| 1002 | hcryp->Instance->DR = (uint32_t)(headerlength >> 32);
|
---|
| 1003 | hcryp->Instance->DR = (uint32_t)(headerlength);
|
---|
| 1004 | hcryp->Instance->DR = (uint32_t)(inputlength >> 32);
|
---|
| 1005 | hcryp->Instance->DR = (uint32_t)(inputlength);
|
---|
| 1006 | }
|
---|
| 1007 | /* Get tick */
|
---|
| 1008 | tickstart = HAL_GetTick();
|
---|
| 1009 |
|
---|
| 1010 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_OFNE))
|
---|
| 1011 | {
|
---|
| 1012 | /* Check for the Timeout */
|
---|
| 1013 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 1014 | {
|
---|
| 1015 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 1016 | {
|
---|
| 1017 | /* Change state */
|
---|
| 1018 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1019 |
|
---|
| 1020 | /* Process Unlocked */
|
---|
| 1021 | __HAL_UNLOCK(hcryp);
|
---|
| 1022 |
|
---|
| 1023 | return HAL_TIMEOUT;
|
---|
| 1024 | }
|
---|
| 1025 | }
|
---|
| 1026 | }
|
---|
| 1027 |
|
---|
| 1028 | /* Read the Auth TAG in the IN FIFO */
|
---|
| 1029 | *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
|
---|
| 1030 | tagaddr+=4;
|
---|
| 1031 | *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
|
---|
| 1032 | tagaddr+=4;
|
---|
| 1033 | *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
|
---|
| 1034 | tagaddr+=4;
|
---|
| 1035 | *(uint32_t*)(tagaddr) = hcryp->Instance->DOUT;
|
---|
| 1036 | }
|
---|
| 1037 |
|
---|
| 1038 | /* Change the CRYP peripheral state */
|
---|
| 1039 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1040 |
|
---|
| 1041 | /* Process Unlocked */
|
---|
| 1042 | __HAL_UNLOCK(hcryp);
|
---|
| 1043 |
|
---|
| 1044 | /* Return function status */
|
---|
| 1045 | return HAL_OK;
|
---|
| 1046 | }
|
---|
| 1047 |
|
---|
| 1048 | /**
|
---|
| 1049 | * @brief Computes the authentication TAG for AES CCM mode.
|
---|
| 1050 | * @note This API is called after HAL_AES_CCM_Encrypt()/HAL_AES_CCM_Decrypt()
|
---|
| 1051 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 1052 | * the configuration information for CRYP module
|
---|
| 1053 | * @param AuthTag: Pointer to the authentication buffer
|
---|
| 1054 | * @param Timeout: Timeout duration
|
---|
| 1055 | * @retval HAL status
|
---|
| 1056 | */
|
---|
| 1057 | HAL_StatusTypeDef HAL_CRYPEx_AESCCM_Finish(CRYP_HandleTypeDef *hcryp, uint8_t *AuthTag, uint32_t Timeout)
|
---|
| 1058 | {
|
---|
| 1059 | uint32_t tickstart = 0;
|
---|
| 1060 | uint32_t tagaddr = (uint32_t)AuthTag;
|
---|
| 1061 | uint32_t ctraddr = (uint32_t)hcryp->Init.pScratch;
|
---|
| 1062 | uint32_t temptag[4] = {0}; /* Temporary TAG (MAC) */
|
---|
| 1063 | uint32_t loopcounter;
|
---|
| 1064 |
|
---|
| 1065 | /* Process Locked */
|
---|
| 1066 | __HAL_LOCK(hcryp);
|
---|
| 1067 |
|
---|
| 1068 | /* Change the CRYP peripheral state */
|
---|
| 1069 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 1070 |
|
---|
| 1071 | /* Check if initialization phase has already been performed */
|
---|
| 1072 | if(hcryp->Phase == HAL_CRYP_PHASE_PROCESS)
|
---|
| 1073 | {
|
---|
| 1074 | /* Change the CRYP phase */
|
---|
| 1075 | hcryp->Phase = HAL_CRYP_PHASE_FINAL;
|
---|
| 1076 |
|
---|
| 1077 | /* Disable CRYP to start the final phase */
|
---|
| 1078 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 1079 |
|
---|
| 1080 | /* Select final phase */
|
---|
| 1081 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_FINAL);
|
---|
| 1082 |
|
---|
| 1083 | /* Enable the CRYP peripheral */
|
---|
| 1084 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1085 |
|
---|
| 1086 | /* Write the counter block in the IN FIFO */
|
---|
| 1087 | hcryp->Instance->DR = *(uint32_t*)ctraddr;
|
---|
| 1088 | ctraddr+=4;
|
---|
| 1089 | hcryp->Instance->DR = *(uint32_t*)ctraddr;
|
---|
| 1090 | ctraddr+=4;
|
---|
| 1091 | hcryp->Instance->DR = *(uint32_t*)ctraddr;
|
---|
| 1092 | ctraddr+=4;
|
---|
| 1093 | hcryp->Instance->DR = *(uint32_t*)ctraddr;
|
---|
| 1094 |
|
---|
| 1095 | /* Get tick */
|
---|
| 1096 | tickstart = HAL_GetTick();
|
---|
| 1097 |
|
---|
| 1098 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_OFNE))
|
---|
| 1099 | {
|
---|
| 1100 | /* Check for the Timeout */
|
---|
| 1101 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 1102 | {
|
---|
| 1103 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 1104 | {
|
---|
| 1105 | /* Change state */
|
---|
| 1106 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1107 |
|
---|
| 1108 | /* Process Unlocked */
|
---|
| 1109 | __HAL_UNLOCK(hcryp);
|
---|
| 1110 |
|
---|
| 1111 | return HAL_TIMEOUT;
|
---|
| 1112 | }
|
---|
| 1113 | }
|
---|
| 1114 | }
|
---|
| 1115 |
|
---|
| 1116 | /* Read the Auth TAG in the IN FIFO */
|
---|
| 1117 | temptag[0] = hcryp->Instance->DOUT;
|
---|
| 1118 | temptag[1] = hcryp->Instance->DOUT;
|
---|
| 1119 | temptag[2] = hcryp->Instance->DOUT;
|
---|
| 1120 | temptag[3] = hcryp->Instance->DOUT;
|
---|
| 1121 | }
|
---|
| 1122 |
|
---|
| 1123 | /* Copy temporary authentication TAG in user TAG buffer */
|
---|
| 1124 | for(loopcounter = 0; loopcounter < hcryp->Init.TagSize ; loopcounter++)
|
---|
| 1125 | {
|
---|
| 1126 | /* Set the authentication TAG buffer */
|
---|
| 1127 | *((uint8_t*)tagaddr+loopcounter) = *((uint8_t*)temptag+loopcounter);
|
---|
| 1128 | }
|
---|
| 1129 |
|
---|
| 1130 | /* Change the CRYP peripheral state */
|
---|
| 1131 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1132 |
|
---|
| 1133 | /* Process Unlocked */
|
---|
| 1134 | __HAL_UNLOCK(hcryp);
|
---|
| 1135 |
|
---|
| 1136 | /* Return function status */
|
---|
| 1137 | return HAL_OK;
|
---|
| 1138 | }
|
---|
| 1139 |
|
---|
| 1140 | /**
|
---|
| 1141 | * @brief Initializes the CRYP peripheral in AES CCM decryption mode then
|
---|
| 1142 | * decrypted pCypherData. The cypher data are available in pPlainData.
|
---|
| 1143 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 1144 | * the configuration information for CRYP module
|
---|
| 1145 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 1146 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 1147 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 1148 | * @param Timeout: Timeout duration
|
---|
| 1149 | * @retval HAL status
|
---|
| 1150 | */
|
---|
| 1151 | HAL_StatusTypeDef HAL_CRYPEx_AESCCM_Decrypt(CRYP_HandleTypeDef *hcryp, uint8_t *pCypherData, uint16_t Size, uint8_t *pPlainData, uint32_t Timeout)
|
---|
| 1152 | {
|
---|
| 1153 | uint32_t tickstart = 0;
|
---|
| 1154 | uint32_t headersize = hcryp->Init.HeaderSize;
|
---|
| 1155 | uint32_t headeraddr = (uint32_t)hcryp->Init.Header;
|
---|
| 1156 | uint32_t loopcounter = 0;
|
---|
| 1157 | uint32_t bufferidx = 0;
|
---|
| 1158 | uint8_t blockb0[16] = {0};/* Block B0 */
|
---|
| 1159 | uint8_t ctr[16] = {0}; /* Counter */
|
---|
| 1160 | uint32_t b0addr = (uint32_t)blockb0;
|
---|
| 1161 |
|
---|
| 1162 | /* Process Locked */
|
---|
| 1163 | __HAL_LOCK(hcryp);
|
---|
| 1164 |
|
---|
| 1165 | /* Change the CRYP peripheral state */
|
---|
| 1166 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 1167 |
|
---|
| 1168 | /* Check if initialization phase has already been performed */
|
---|
| 1169 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 1170 | {
|
---|
| 1171 | /************************ Formatting the header block *********************/
|
---|
| 1172 | if(headersize != 0)
|
---|
| 1173 | {
|
---|
| 1174 | /* Check that the associated data (or header) length is lower than 2^16 - 2^8 = 65536 - 256 = 65280 */
|
---|
| 1175 | if(headersize < 65280)
|
---|
| 1176 | {
|
---|
| 1177 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize >> 8) & 0xFF);
|
---|
| 1178 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize) & 0xFF);
|
---|
| 1179 | headersize += 2;
|
---|
| 1180 | }
|
---|
| 1181 | else
|
---|
| 1182 | {
|
---|
| 1183 | /* Header is encoded as 0xff || 0xfe || [headersize]32, i.e., six octets */
|
---|
| 1184 | hcryp->Init.pScratch[bufferidx++] = 0xFF;
|
---|
| 1185 | hcryp->Init.pScratch[bufferidx++] = 0xFE;
|
---|
| 1186 | hcryp->Init.pScratch[bufferidx++] = headersize & 0xff000000;
|
---|
| 1187 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x00ff0000;
|
---|
| 1188 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x0000ff00;
|
---|
| 1189 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x000000ff;
|
---|
| 1190 | headersize += 6;
|
---|
| 1191 | }
|
---|
| 1192 | /* Copy the header buffer in internal buffer "hcryp->Init.pScratch" */
|
---|
| 1193 | for(loopcounter = 0; loopcounter < headersize; loopcounter++)
|
---|
| 1194 | {
|
---|
| 1195 | hcryp->Init.pScratch[bufferidx++] = hcryp->Init.Header[loopcounter];
|
---|
| 1196 | }
|
---|
| 1197 | /* Check if the header size is modulo 16 */
|
---|
| 1198 | if ((headersize % 16) != 0)
|
---|
| 1199 | {
|
---|
| 1200 | /* Padd the header buffer with 0s till the hcryp->Init.pScratch length is modulo 16 */
|
---|
| 1201 | for(loopcounter = headersize; loopcounter <= ((headersize/16) + 1) * 16; loopcounter++)
|
---|
| 1202 | {
|
---|
| 1203 | hcryp->Init.pScratch[loopcounter] = 0;
|
---|
| 1204 | }
|
---|
| 1205 | /* Set the header size to modulo 16 */
|
---|
| 1206 | headersize = ((headersize/16) + 1) * 16;
|
---|
| 1207 | }
|
---|
| 1208 | /* Set the pointer headeraddr to hcryp->Init.pScratch */
|
---|
| 1209 | headeraddr = (uint32_t)hcryp->Init.pScratch;
|
---|
| 1210 | }
|
---|
| 1211 | /*********************** Formatting the block B0 **************************/
|
---|
| 1212 | if(headersize != 0)
|
---|
| 1213 | {
|
---|
| 1214 | blockb0[0] = 0x40;
|
---|
| 1215 | }
|
---|
| 1216 | /* Flags byte */
|
---|
| 1217 | /* blockb0[0] |= 0u | (((( (uint8_t) hcryp->Init.TagSize - 2) / 2) & 0x07 ) << 3 ) | ( ( (uint8_t) (15 - hcryp->Init.IVSize) - 1) & 0x07) */
|
---|
| 1218 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)(((uint8_t)(hcryp->Init.TagSize - (uint8_t)(2))) >> 1) & (uint8_t)0x07 ) << 3);
|
---|
| 1219 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)((uint8_t)(15) - hcryp->Init.IVSize) - (uint8_t)1) & (uint8_t)0x07);
|
---|
| 1220 |
|
---|
| 1221 | for (loopcounter = 0; loopcounter < hcryp->Init.IVSize; loopcounter++)
|
---|
| 1222 | {
|
---|
| 1223 | blockb0[loopcounter+1] = hcryp->Init.pInitVect[loopcounter];
|
---|
| 1224 | }
|
---|
| 1225 | for ( ; loopcounter < 13; loopcounter++)
|
---|
| 1226 | {
|
---|
| 1227 | blockb0[loopcounter+1] = 0;
|
---|
| 1228 | }
|
---|
| 1229 |
|
---|
| 1230 | blockb0[14] = (Size >> 8);
|
---|
| 1231 | blockb0[15] = (Size & 0xFF);
|
---|
| 1232 |
|
---|
| 1233 | /************************* Formatting the initial counter *****************/
|
---|
| 1234 | /* Byte 0:
|
---|
| 1235 | Bits 7 and 6 are reserved and shall be set to 0
|
---|
| 1236 | Bits 3, 4, and 5 shall also be set to 0, to ensure that all the counter
|
---|
| 1237 | blocks are distinct from B0
|
---|
| 1238 | Bits 0, 1, and 2 contain the same encoding of q as in B0
|
---|
| 1239 | */
|
---|
| 1240 | ctr[0] = blockb0[0] & 0x07;
|
---|
| 1241 | /* byte 1 to NonceSize is the IV (Nonce) */
|
---|
| 1242 | for(loopcounter = 1; loopcounter < hcryp->Init.IVSize + 1; loopcounter++)
|
---|
| 1243 | {
|
---|
| 1244 | ctr[loopcounter] = blockb0[loopcounter];
|
---|
| 1245 | }
|
---|
| 1246 | /* Set the LSB to 1 */
|
---|
| 1247 | ctr[15] |= 0x01;
|
---|
| 1248 |
|
---|
| 1249 | /* Set the key */
|
---|
| 1250 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 1251 |
|
---|
| 1252 | /* Set the CRYP peripheral in AES CCM mode */
|
---|
| 1253 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_CCM_DECRYPT);
|
---|
| 1254 |
|
---|
| 1255 | /* Set the Initialization Vector */
|
---|
| 1256 | CRYPEx_GCMCCM_SetInitVector(hcryp, ctr);
|
---|
| 1257 |
|
---|
| 1258 | /* Select init phase */
|
---|
| 1259 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_INIT);
|
---|
| 1260 |
|
---|
| 1261 | b0addr = (uint32_t)blockb0;
|
---|
| 1262 | /* Write the blockb0 block in the IN FIFO */
|
---|
| 1263 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1264 | b0addr+=4;
|
---|
| 1265 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1266 | b0addr+=4;
|
---|
| 1267 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1268 | b0addr+=4;
|
---|
| 1269 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1270 |
|
---|
| 1271 | /* Enable the CRYP peripheral */
|
---|
| 1272 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1273 |
|
---|
| 1274 | /* Get tick */
|
---|
| 1275 | tickstart = HAL_GetTick();
|
---|
| 1276 |
|
---|
| 1277 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 1278 | {
|
---|
| 1279 | /* Check for the Timeout */
|
---|
| 1280 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 1281 | {
|
---|
| 1282 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 1283 | {
|
---|
| 1284 | /* Change state */
|
---|
| 1285 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1286 |
|
---|
| 1287 | /* Process Unlocked */
|
---|
| 1288 | __HAL_UNLOCK(hcryp);
|
---|
| 1289 |
|
---|
| 1290 | return HAL_TIMEOUT;
|
---|
| 1291 | }
|
---|
| 1292 | }
|
---|
| 1293 | }
|
---|
| 1294 | /***************************** Header phase *******************************/
|
---|
| 1295 | if(headersize != 0)
|
---|
| 1296 | {
|
---|
| 1297 | /* Select header phase */
|
---|
| 1298 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_HEADER);
|
---|
| 1299 |
|
---|
| 1300 | /* Enable Crypto processor */
|
---|
| 1301 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1302 |
|
---|
| 1303 | for(loopcounter = 0; (loopcounter < headersize); loopcounter+=16)
|
---|
| 1304 | {
|
---|
| 1305 | /* Get tick */
|
---|
| 1306 | tickstart = HAL_GetTick();
|
---|
| 1307 |
|
---|
| 1308 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_IFEM))
|
---|
| 1309 | {
|
---|
| 1310 | /* Check for the Timeout */
|
---|
| 1311 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 1312 | {
|
---|
| 1313 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 1314 | {
|
---|
| 1315 | /* Change state */
|
---|
| 1316 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1317 |
|
---|
| 1318 | /* Process Unlocked */
|
---|
| 1319 | __HAL_UNLOCK(hcryp);
|
---|
| 1320 |
|
---|
| 1321 | return HAL_TIMEOUT;
|
---|
| 1322 | }
|
---|
| 1323 | }
|
---|
| 1324 | }
|
---|
| 1325 | /* Write the header block in the IN FIFO */
|
---|
| 1326 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1327 | headeraddr+=4;
|
---|
| 1328 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1329 | headeraddr+=4;
|
---|
| 1330 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1331 | headeraddr+=4;
|
---|
| 1332 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1333 | headeraddr+=4;
|
---|
| 1334 | }
|
---|
| 1335 |
|
---|
| 1336 | /* Get tick */
|
---|
| 1337 | tickstart = HAL_GetTick();
|
---|
| 1338 |
|
---|
| 1339 | while((hcryp->Instance->SR & CRYP_FLAG_BUSY) == CRYP_FLAG_BUSY)
|
---|
| 1340 | {
|
---|
| 1341 | /* Check for the Timeout */
|
---|
| 1342 | if(Timeout != HAL_MAX_DELAY)
|
---|
| 1343 | {
|
---|
| 1344 | if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
|
---|
| 1345 | {
|
---|
| 1346 | /* Change state */
|
---|
| 1347 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1348 |
|
---|
| 1349 | /* Process Unlocked */
|
---|
| 1350 | __HAL_UNLOCK(hcryp);
|
---|
| 1351 |
|
---|
| 1352 | return HAL_TIMEOUT;
|
---|
| 1353 | }
|
---|
| 1354 | }
|
---|
| 1355 | }
|
---|
| 1356 | }
|
---|
| 1357 | /* Save formatted counter into the scratch buffer pScratch */
|
---|
| 1358 | for(loopcounter = 0; (loopcounter < 16); loopcounter++)
|
---|
| 1359 | {
|
---|
| 1360 | hcryp->Init.pScratch[loopcounter] = ctr[loopcounter];
|
---|
| 1361 | }
|
---|
| 1362 | /* Reset bit 0 */
|
---|
| 1363 | hcryp->Init.pScratch[15] &= 0xfe;
|
---|
| 1364 | /* Select payload phase once the header phase is performed */
|
---|
| 1365 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 1366 |
|
---|
| 1367 | /* Flush FIFO */
|
---|
| 1368 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 1369 |
|
---|
| 1370 | /* Enable the CRYP peripheral */
|
---|
| 1371 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1372 |
|
---|
| 1373 | /* Set the phase */
|
---|
| 1374 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 1375 | }
|
---|
| 1376 |
|
---|
| 1377 | /* Write Plain Data and Get Cypher Data */
|
---|
| 1378 | if(CRYPEx_GCMCCM_ProcessData(hcryp, pCypherData, Size, pPlainData, Timeout) != HAL_OK)
|
---|
| 1379 | {
|
---|
| 1380 | return HAL_TIMEOUT;
|
---|
| 1381 | }
|
---|
| 1382 |
|
---|
| 1383 | /* Change the CRYP peripheral state */
|
---|
| 1384 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1385 |
|
---|
| 1386 | /* Process Unlocked */
|
---|
| 1387 | __HAL_UNLOCK(hcryp);
|
---|
| 1388 |
|
---|
| 1389 | /* Return function status */
|
---|
| 1390 | return HAL_OK;
|
---|
| 1391 | }
|
---|
| 1392 |
|
---|
| 1393 | /**
|
---|
| 1394 | * @brief Initializes the CRYP peripheral in AES GCM encryption mode using IT.
|
---|
| 1395 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 1396 | * the configuration information for CRYP module
|
---|
| 1397 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 1398 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 1399 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 1400 | * @retval HAL status
|
---|
| 1401 | */
|
---|
| 1402 | HAL_StatusTypeDef HAL_CRYPEx_AESGCM_Encrypt_IT(CRYP_HandleTypeDef *hcryp, uint8_t *pPlainData, uint16_t Size, uint8_t *pCypherData)
|
---|
| 1403 | {
|
---|
| 1404 | uint32_t tickstart = 0;
|
---|
| 1405 | uint32_t inputaddr;
|
---|
| 1406 | uint32_t outputaddr;
|
---|
| 1407 |
|
---|
| 1408 | if(hcryp->State == HAL_CRYP_STATE_READY)
|
---|
| 1409 | {
|
---|
| 1410 | /* Process Locked */
|
---|
| 1411 | __HAL_LOCK(hcryp);
|
---|
| 1412 |
|
---|
| 1413 | /* Get the buffer addresses and sizes */
|
---|
| 1414 | hcryp->CrypInCount = Size;
|
---|
| 1415 | hcryp->pCrypInBuffPtr = pPlainData;
|
---|
| 1416 | hcryp->pCrypOutBuffPtr = pCypherData;
|
---|
| 1417 | hcryp->CrypOutCount = Size;
|
---|
| 1418 |
|
---|
| 1419 | /* Change the CRYP peripheral state */
|
---|
| 1420 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 1421 |
|
---|
| 1422 | /* Check if initialization phase has already been performed */
|
---|
| 1423 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 1424 | {
|
---|
| 1425 | /* Set the key */
|
---|
| 1426 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 1427 |
|
---|
| 1428 | /* Set the CRYP peripheral in AES GCM mode */
|
---|
| 1429 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_GCM_ENCRYPT);
|
---|
| 1430 |
|
---|
| 1431 | /* Set the Initialization Vector */
|
---|
| 1432 | CRYPEx_GCMCCM_SetInitVector(hcryp, hcryp->Init.pInitVect);
|
---|
| 1433 |
|
---|
| 1434 | /* Flush FIFO */
|
---|
| 1435 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 1436 |
|
---|
| 1437 | /* Enable CRYP to start the init phase */
|
---|
| 1438 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1439 |
|
---|
| 1440 | /* Get tick */
|
---|
| 1441 | tickstart = HAL_GetTick();
|
---|
| 1442 |
|
---|
| 1443 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 1444 | {
|
---|
| 1445 | /* Check for the Timeout */
|
---|
| 1446 |
|
---|
| 1447 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 1448 | {
|
---|
| 1449 | /* Change state */
|
---|
| 1450 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1451 |
|
---|
| 1452 | /* Process Unlocked */
|
---|
| 1453 | __HAL_UNLOCK(hcryp);
|
---|
| 1454 |
|
---|
| 1455 | return HAL_TIMEOUT;
|
---|
| 1456 |
|
---|
| 1457 | }
|
---|
| 1458 | }
|
---|
| 1459 |
|
---|
| 1460 | /* Set the header phase */
|
---|
| 1461 | if(CRYPEx_GCMCCM_SetHeaderPhase(hcryp, hcryp->Init.Header, hcryp->Init.HeaderSize, 1) != HAL_OK)
|
---|
| 1462 | {
|
---|
| 1463 | return HAL_TIMEOUT;
|
---|
| 1464 | }
|
---|
| 1465 | /* Disable the CRYP peripheral */
|
---|
| 1466 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 1467 |
|
---|
| 1468 | /* Select payload phase once the header phase is performed */
|
---|
| 1469 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 1470 |
|
---|
| 1471 | /* Flush FIFO */
|
---|
| 1472 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 1473 |
|
---|
| 1474 | /* Set the phase */
|
---|
| 1475 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 1476 | }
|
---|
| 1477 |
|
---|
| 1478 | if(Size != 0)
|
---|
| 1479 | {
|
---|
| 1480 | /* Enable Interrupts */
|
---|
| 1481 | __HAL_CRYP_ENABLE_IT(hcryp, CRYP_IT_INI | CRYP_IT_OUTI);
|
---|
| 1482 | /* Enable the CRYP peripheral */
|
---|
| 1483 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1484 | }
|
---|
| 1485 | else
|
---|
| 1486 | {
|
---|
| 1487 | /* Process Locked */
|
---|
| 1488 | __HAL_UNLOCK(hcryp);
|
---|
| 1489 | /* Change the CRYP state and phase */
|
---|
| 1490 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1491 | }
|
---|
| 1492 | /* Return function status */
|
---|
| 1493 | return HAL_OK;
|
---|
| 1494 | }
|
---|
| 1495 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_INI))
|
---|
| 1496 | {
|
---|
| 1497 | inputaddr = (uint32_t)hcryp->pCrypInBuffPtr;
|
---|
| 1498 | /* Write the Input block in the IN FIFO */
|
---|
| 1499 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1500 | inputaddr+=4;
|
---|
| 1501 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1502 | inputaddr+=4;
|
---|
| 1503 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1504 | inputaddr+=4;
|
---|
| 1505 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1506 | hcryp->pCrypInBuffPtr += 16;
|
---|
| 1507 | hcryp->CrypInCount -= 16;
|
---|
| 1508 | if(hcryp->CrypInCount == 0)
|
---|
| 1509 | {
|
---|
| 1510 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_INI);
|
---|
| 1511 | /* Call the Input data transfer complete callback */
|
---|
| 1512 | HAL_CRYP_InCpltCallback(hcryp);
|
---|
| 1513 | }
|
---|
| 1514 | }
|
---|
| 1515 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_OUTI))
|
---|
| 1516 | {
|
---|
| 1517 | outputaddr = (uint32_t)hcryp->pCrypOutBuffPtr;
|
---|
| 1518 | /* Read the Output block from the Output FIFO */
|
---|
| 1519 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1520 | outputaddr+=4;
|
---|
| 1521 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1522 | outputaddr+=4;
|
---|
| 1523 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1524 | outputaddr+=4;
|
---|
| 1525 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1526 | hcryp->pCrypOutBuffPtr += 16;
|
---|
| 1527 | hcryp->CrypOutCount -= 16;
|
---|
| 1528 | if(hcryp->CrypOutCount == 0)
|
---|
| 1529 | {
|
---|
| 1530 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_OUTI);
|
---|
| 1531 | /* Process Unlocked */
|
---|
| 1532 | __HAL_UNLOCK(hcryp);
|
---|
| 1533 | /* Change the CRYP peripheral state */
|
---|
| 1534 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1535 | /* Call Input transfer complete callback */
|
---|
| 1536 | HAL_CRYP_OutCpltCallback(hcryp);
|
---|
| 1537 | }
|
---|
| 1538 | }
|
---|
| 1539 |
|
---|
| 1540 | /* Return function status */
|
---|
| 1541 | return HAL_OK;
|
---|
| 1542 | }
|
---|
| 1543 |
|
---|
| 1544 | /**
|
---|
| 1545 | * @brief Initializes the CRYP peripheral in AES CCM encryption mode using interrupt.
|
---|
| 1546 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 1547 | * the configuration information for CRYP module
|
---|
| 1548 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 1549 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 1550 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 1551 | * @retval HAL status
|
---|
| 1552 | */
|
---|
| 1553 | HAL_StatusTypeDef HAL_CRYPEx_AESCCM_Encrypt_IT(CRYP_HandleTypeDef *hcryp, uint8_t *pPlainData, uint16_t Size, uint8_t *pCypherData)
|
---|
| 1554 | {
|
---|
| 1555 | uint32_t tickstart = 0;
|
---|
| 1556 | uint32_t inputaddr;
|
---|
| 1557 | uint32_t outputaddr;
|
---|
| 1558 |
|
---|
| 1559 | uint32_t headersize = hcryp->Init.HeaderSize;
|
---|
| 1560 | uint32_t headeraddr = (uint32_t)hcryp->Init.Header;
|
---|
| 1561 | uint32_t loopcounter = 0;
|
---|
| 1562 | uint32_t bufferidx = 0;
|
---|
| 1563 | uint8_t blockb0[16] = {0};/* Block B0 */
|
---|
| 1564 | uint8_t ctr[16] = {0}; /* Counter */
|
---|
| 1565 | uint32_t b0addr = (uint32_t)blockb0;
|
---|
| 1566 |
|
---|
| 1567 | if(hcryp->State == HAL_CRYP_STATE_READY)
|
---|
| 1568 | {
|
---|
| 1569 | /* Process Locked */
|
---|
| 1570 | __HAL_LOCK(hcryp);
|
---|
| 1571 |
|
---|
| 1572 | hcryp->CrypInCount = Size;
|
---|
| 1573 | hcryp->pCrypInBuffPtr = pPlainData;
|
---|
| 1574 | hcryp->pCrypOutBuffPtr = pCypherData;
|
---|
| 1575 | hcryp->CrypOutCount = Size;
|
---|
| 1576 |
|
---|
| 1577 | /* Change the CRYP peripheral state */
|
---|
| 1578 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 1579 |
|
---|
| 1580 | /* Check if initialization phase has already been performed */
|
---|
| 1581 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 1582 | {
|
---|
| 1583 | /************************ Formatting the header block *******************/
|
---|
| 1584 | if(headersize != 0)
|
---|
| 1585 | {
|
---|
| 1586 | /* Check that the associated data (or header) length is lower than 2^16 - 2^8 = 65536 - 256 = 65280 */
|
---|
| 1587 | if(headersize < 65280)
|
---|
| 1588 | {
|
---|
| 1589 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize >> 8) & 0xFF);
|
---|
| 1590 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize) & 0xFF);
|
---|
| 1591 | headersize += 2;
|
---|
| 1592 | }
|
---|
| 1593 | else
|
---|
| 1594 | {
|
---|
| 1595 | /* Header is encoded as 0xff || 0xfe || [headersize]32, i.e., six octets */
|
---|
| 1596 | hcryp->Init.pScratch[bufferidx++] = 0xFF;
|
---|
| 1597 | hcryp->Init.pScratch[bufferidx++] = 0xFE;
|
---|
| 1598 | hcryp->Init.pScratch[bufferidx++] = headersize & 0xff000000;
|
---|
| 1599 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x00ff0000;
|
---|
| 1600 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x0000ff00;
|
---|
| 1601 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x000000ff;
|
---|
| 1602 | headersize += 6;
|
---|
| 1603 | }
|
---|
| 1604 | /* Copy the header buffer in internal buffer "hcryp->Init.pScratch" */
|
---|
| 1605 | for(loopcounter = 0; loopcounter < headersize; loopcounter++)
|
---|
| 1606 | {
|
---|
| 1607 | hcryp->Init.pScratch[bufferidx++] = hcryp->Init.Header[loopcounter];
|
---|
| 1608 | }
|
---|
| 1609 | /* Check if the header size is modulo 16 */
|
---|
| 1610 | if ((headersize % 16) != 0)
|
---|
| 1611 | {
|
---|
| 1612 | /* Padd the header buffer with 0s till the hcryp->Init.pScratch length is modulo 16 */
|
---|
| 1613 | for(loopcounter = headersize; loopcounter <= ((headersize/16) + 1) * 16; loopcounter++)
|
---|
| 1614 | {
|
---|
| 1615 | hcryp->Init.pScratch[loopcounter] = 0;
|
---|
| 1616 | }
|
---|
| 1617 | /* Set the header size to modulo 16 */
|
---|
| 1618 | headersize = ((headersize/16) + 1) * 16;
|
---|
| 1619 | }
|
---|
| 1620 | /* Set the pointer headeraddr to hcryp->Init.pScratch */
|
---|
| 1621 | headeraddr = (uint32_t)hcryp->Init.pScratch;
|
---|
| 1622 | }
|
---|
| 1623 | /*********************** Formatting the block B0 ************************/
|
---|
| 1624 | if(headersize != 0)
|
---|
| 1625 | {
|
---|
| 1626 | blockb0[0] = 0x40;
|
---|
| 1627 | }
|
---|
| 1628 | /* Flags byte */
|
---|
| 1629 | /* blockb0[0] |= 0u | (((( (uint8_t) hcryp->Init.TagSize - 2) / 2) & 0x07 ) << 3 ) | ( ( (uint8_t) (15 - hcryp->Init.IVSize) - 1) & 0x07) */
|
---|
| 1630 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)(((uint8_t)(hcryp->Init.TagSize - (uint8_t)(2))) >> 1) & (uint8_t)0x07 ) << 3);
|
---|
| 1631 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)((uint8_t)(15) - hcryp->Init.IVSize) - (uint8_t)1) & (uint8_t)0x07);
|
---|
| 1632 |
|
---|
| 1633 | for (loopcounter = 0; loopcounter < hcryp->Init.IVSize; loopcounter++)
|
---|
| 1634 | {
|
---|
| 1635 | blockb0[loopcounter+1] = hcryp->Init.pInitVect[loopcounter];
|
---|
| 1636 | }
|
---|
| 1637 | for ( ; loopcounter < 13; loopcounter++)
|
---|
| 1638 | {
|
---|
| 1639 | blockb0[loopcounter+1] = 0;
|
---|
| 1640 | }
|
---|
| 1641 |
|
---|
| 1642 | blockb0[14] = (Size >> 8);
|
---|
| 1643 | blockb0[15] = (Size & 0xFF);
|
---|
| 1644 |
|
---|
| 1645 | /************************* Formatting the initial counter ***************/
|
---|
| 1646 | /* Byte 0:
|
---|
| 1647 | Bits 7 and 6 are reserved and shall be set to 0
|
---|
| 1648 | Bits 3, 4, and 5 shall also be set to 0, to ensure that all the counter
|
---|
| 1649 | blocks are distinct from B0
|
---|
| 1650 | Bits 0, 1, and 2 contain the same encoding of q as in B0
|
---|
| 1651 | */
|
---|
| 1652 | ctr[0] = blockb0[0] & 0x07;
|
---|
| 1653 | /* byte 1 to NonceSize is the IV (Nonce) */
|
---|
| 1654 | for(loopcounter = 1; loopcounter < hcryp->Init.IVSize + 1; loopcounter++)
|
---|
| 1655 | {
|
---|
| 1656 | ctr[loopcounter] = blockb0[loopcounter];
|
---|
| 1657 | }
|
---|
| 1658 | /* Set the LSB to 1 */
|
---|
| 1659 | ctr[15] |= 0x01;
|
---|
| 1660 |
|
---|
| 1661 | /* Set the key */
|
---|
| 1662 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 1663 |
|
---|
| 1664 | /* Set the CRYP peripheral in AES CCM mode */
|
---|
| 1665 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_CCM_ENCRYPT);
|
---|
| 1666 |
|
---|
| 1667 | /* Set the Initialization Vector */
|
---|
| 1668 | CRYPEx_GCMCCM_SetInitVector(hcryp, ctr);
|
---|
| 1669 |
|
---|
| 1670 | /* Select init phase */
|
---|
| 1671 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_INIT);
|
---|
| 1672 |
|
---|
| 1673 | b0addr = (uint32_t)blockb0;
|
---|
| 1674 | /* Write the blockb0 block in the IN FIFO */
|
---|
| 1675 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1676 | b0addr+=4;
|
---|
| 1677 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1678 | b0addr+=4;
|
---|
| 1679 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1680 | b0addr+=4;
|
---|
| 1681 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 1682 |
|
---|
| 1683 | /* Enable the CRYP peripheral */
|
---|
| 1684 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1685 |
|
---|
| 1686 | /* Get tick */
|
---|
| 1687 | tickstart = HAL_GetTick();
|
---|
| 1688 |
|
---|
| 1689 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 1690 | {
|
---|
| 1691 | /* Check for the Timeout */
|
---|
| 1692 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 1693 | {
|
---|
| 1694 | /* Change state */
|
---|
| 1695 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1696 |
|
---|
| 1697 | /* Process Unlocked */
|
---|
| 1698 | __HAL_UNLOCK(hcryp);
|
---|
| 1699 |
|
---|
| 1700 | return HAL_TIMEOUT;
|
---|
| 1701 | }
|
---|
| 1702 | }
|
---|
| 1703 | /***************************** Header phase *****************************/
|
---|
| 1704 | if(headersize != 0)
|
---|
| 1705 | {
|
---|
| 1706 | /* Select header phase */
|
---|
| 1707 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_HEADER);
|
---|
| 1708 |
|
---|
| 1709 | /* Enable Crypto processor */
|
---|
| 1710 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1711 |
|
---|
| 1712 | for(loopcounter = 0; (loopcounter < headersize); loopcounter+=16)
|
---|
| 1713 | {
|
---|
| 1714 | /* Get tick */
|
---|
| 1715 | tickstart = HAL_GetTick();
|
---|
| 1716 |
|
---|
| 1717 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_IFEM))
|
---|
| 1718 | {
|
---|
| 1719 | /* Check for the Timeout */
|
---|
| 1720 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 1721 | {
|
---|
| 1722 | /* Change state */
|
---|
| 1723 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1724 |
|
---|
| 1725 | /* Process Unlocked */
|
---|
| 1726 | __HAL_UNLOCK(hcryp);
|
---|
| 1727 |
|
---|
| 1728 | return HAL_TIMEOUT;
|
---|
| 1729 | }
|
---|
| 1730 | }
|
---|
| 1731 | /* Write the header block in the IN FIFO */
|
---|
| 1732 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1733 | headeraddr+=4;
|
---|
| 1734 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1735 | headeraddr+=4;
|
---|
| 1736 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1737 | headeraddr+=4;
|
---|
| 1738 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 1739 | headeraddr+=4;
|
---|
| 1740 | }
|
---|
| 1741 |
|
---|
| 1742 | /* Get tick */
|
---|
| 1743 | tickstart = HAL_GetTick();
|
---|
| 1744 |
|
---|
| 1745 | while((hcryp->Instance->SR & CRYP_FLAG_BUSY) == CRYP_FLAG_BUSY)
|
---|
| 1746 | {
|
---|
| 1747 | /* Check for the Timeout */
|
---|
| 1748 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 1749 | {
|
---|
| 1750 | /* Change state */
|
---|
| 1751 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1752 |
|
---|
| 1753 | /* Process Unlocked */
|
---|
| 1754 | __HAL_UNLOCK(hcryp);
|
---|
| 1755 |
|
---|
| 1756 | return HAL_TIMEOUT;
|
---|
| 1757 | }
|
---|
| 1758 | }
|
---|
| 1759 | }
|
---|
| 1760 | /* Save formatted counter into the scratch buffer pScratch */
|
---|
| 1761 | for(loopcounter = 0; (loopcounter < 16); loopcounter++)
|
---|
| 1762 | {
|
---|
| 1763 | hcryp->Init.pScratch[loopcounter] = ctr[loopcounter];
|
---|
| 1764 | }
|
---|
| 1765 | /* Reset bit 0 */
|
---|
| 1766 | hcryp->Init.pScratch[15] &= 0xfe;
|
---|
| 1767 |
|
---|
| 1768 | /* Select payload phase once the header phase is performed */
|
---|
| 1769 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 1770 |
|
---|
| 1771 | /* Flush FIFO */
|
---|
| 1772 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 1773 |
|
---|
| 1774 | /* Set the phase */
|
---|
| 1775 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 1776 | }
|
---|
| 1777 |
|
---|
| 1778 | if(Size != 0)
|
---|
| 1779 | {
|
---|
| 1780 | /* Enable Interrupts */
|
---|
| 1781 | __HAL_CRYP_ENABLE_IT(hcryp, CRYP_IT_INI | CRYP_IT_OUTI);
|
---|
| 1782 | /* Enable the CRYP peripheral */
|
---|
| 1783 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1784 | }
|
---|
| 1785 | else
|
---|
| 1786 | {
|
---|
| 1787 | /* Change the CRYP state and phase */
|
---|
| 1788 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1789 | }
|
---|
| 1790 |
|
---|
| 1791 | /* Return function status */
|
---|
| 1792 | return HAL_OK;
|
---|
| 1793 | }
|
---|
| 1794 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_INI))
|
---|
| 1795 | {
|
---|
| 1796 | inputaddr = (uint32_t)hcryp->pCrypInBuffPtr;
|
---|
| 1797 | /* Write the Input block in the IN FIFO */
|
---|
| 1798 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1799 | inputaddr+=4;
|
---|
| 1800 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1801 | inputaddr+=4;
|
---|
| 1802 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1803 | inputaddr+=4;
|
---|
| 1804 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1805 | hcryp->pCrypInBuffPtr += 16;
|
---|
| 1806 | hcryp->CrypInCount -= 16;
|
---|
| 1807 | if(hcryp->CrypInCount == 0)
|
---|
| 1808 | {
|
---|
| 1809 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_INI);
|
---|
| 1810 | /* Call Input transfer complete callback */
|
---|
| 1811 | HAL_CRYP_InCpltCallback(hcryp);
|
---|
| 1812 | }
|
---|
| 1813 | }
|
---|
| 1814 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_OUTI))
|
---|
| 1815 | {
|
---|
| 1816 | outputaddr = (uint32_t)hcryp->pCrypOutBuffPtr;
|
---|
| 1817 | /* Read the Output block from the Output FIFO */
|
---|
| 1818 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1819 | outputaddr+=4;
|
---|
| 1820 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1821 | outputaddr+=4;
|
---|
| 1822 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1823 | outputaddr+=4;
|
---|
| 1824 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1825 | hcryp->pCrypOutBuffPtr += 16;
|
---|
| 1826 | hcryp->CrypOutCount -= 16;
|
---|
| 1827 | if(hcryp->CrypOutCount == 0)
|
---|
| 1828 | {
|
---|
| 1829 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_OUTI);
|
---|
| 1830 | /* Process Unlocked */
|
---|
| 1831 | __HAL_UNLOCK(hcryp);
|
---|
| 1832 | /* Change the CRYP peripheral state */
|
---|
| 1833 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1834 | /* Call Input transfer complete callback */
|
---|
| 1835 | HAL_CRYP_OutCpltCallback(hcryp);
|
---|
| 1836 | }
|
---|
| 1837 | }
|
---|
| 1838 |
|
---|
| 1839 | /* Return function status */
|
---|
| 1840 | return HAL_OK;
|
---|
| 1841 | }
|
---|
| 1842 |
|
---|
| 1843 | /**
|
---|
| 1844 | * @brief Initializes the CRYP peripheral in AES GCM decryption mode using IT.
|
---|
| 1845 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 1846 | * the configuration information for CRYP module
|
---|
| 1847 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 1848 | * @param Size: Length of the cyphertext buffer, must be a multiple of 16
|
---|
| 1849 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 1850 | * @retval HAL status
|
---|
| 1851 | */
|
---|
| 1852 | HAL_StatusTypeDef HAL_CRYPEx_AESGCM_Decrypt_IT(CRYP_HandleTypeDef *hcryp, uint8_t *pCypherData, uint16_t Size, uint8_t *pPlainData)
|
---|
| 1853 | {
|
---|
| 1854 | uint32_t tickstart = 0;
|
---|
| 1855 | uint32_t inputaddr;
|
---|
| 1856 | uint32_t outputaddr;
|
---|
| 1857 |
|
---|
| 1858 | if(hcryp->State == HAL_CRYP_STATE_READY)
|
---|
| 1859 | {
|
---|
| 1860 | /* Process Locked */
|
---|
| 1861 | __HAL_LOCK(hcryp);
|
---|
| 1862 |
|
---|
| 1863 | /* Get the buffer addresses and sizes */
|
---|
| 1864 | hcryp->CrypInCount = Size;
|
---|
| 1865 | hcryp->pCrypInBuffPtr = pCypherData;
|
---|
| 1866 | hcryp->pCrypOutBuffPtr = pPlainData;
|
---|
| 1867 | hcryp->CrypOutCount = Size;
|
---|
| 1868 |
|
---|
| 1869 | /* Change the CRYP peripheral state */
|
---|
| 1870 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 1871 |
|
---|
| 1872 | /* Check if initialization phase has already been performed */
|
---|
| 1873 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 1874 | {
|
---|
| 1875 | /* Set the key */
|
---|
| 1876 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 1877 |
|
---|
| 1878 | /* Set the CRYP peripheral in AES GCM decryption mode */
|
---|
| 1879 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_GCM_DECRYPT);
|
---|
| 1880 |
|
---|
| 1881 | /* Set the Initialization Vector */
|
---|
| 1882 | CRYPEx_GCMCCM_SetInitVector(hcryp, hcryp->Init.pInitVect);
|
---|
| 1883 |
|
---|
| 1884 | /* Flush FIFO */
|
---|
| 1885 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 1886 |
|
---|
| 1887 | /* Enable CRYP to start the init phase */
|
---|
| 1888 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1889 |
|
---|
| 1890 | /* Get tick */
|
---|
| 1891 | tickstart = HAL_GetTick();
|
---|
| 1892 |
|
---|
| 1893 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 1894 | {
|
---|
| 1895 | /* Check for the Timeout */
|
---|
| 1896 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 1897 | {
|
---|
| 1898 | /* Change state */
|
---|
| 1899 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 1900 |
|
---|
| 1901 | /* Process Unlocked */
|
---|
| 1902 | __HAL_UNLOCK(hcryp);
|
---|
| 1903 |
|
---|
| 1904 | return HAL_TIMEOUT;
|
---|
| 1905 | }
|
---|
| 1906 | }
|
---|
| 1907 |
|
---|
| 1908 | /* Set the header phase */
|
---|
| 1909 | if(CRYPEx_GCMCCM_SetHeaderPhase(hcryp, hcryp->Init.Header, hcryp->Init.HeaderSize, 1) != HAL_OK)
|
---|
| 1910 | {
|
---|
| 1911 | return HAL_TIMEOUT;
|
---|
| 1912 | }
|
---|
| 1913 | /* Disable the CRYP peripheral */
|
---|
| 1914 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 1915 |
|
---|
| 1916 | /* Select payload phase once the header phase is performed */
|
---|
| 1917 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 1918 |
|
---|
| 1919 | /* Set the phase */
|
---|
| 1920 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 1921 | }
|
---|
| 1922 |
|
---|
| 1923 | if(Size != 0)
|
---|
| 1924 | {
|
---|
| 1925 | /* Enable Interrupts */
|
---|
| 1926 | __HAL_CRYP_ENABLE_IT(hcryp, CRYP_IT_INI | CRYP_IT_OUTI);
|
---|
| 1927 | /* Enable the CRYP peripheral */
|
---|
| 1928 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 1929 | }
|
---|
| 1930 | else
|
---|
| 1931 | {
|
---|
| 1932 | /* Process Locked */
|
---|
| 1933 | __HAL_UNLOCK(hcryp);
|
---|
| 1934 | /* Change the CRYP state and phase */
|
---|
| 1935 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1936 | }
|
---|
| 1937 |
|
---|
| 1938 | /* Return function status */
|
---|
| 1939 | return HAL_OK;
|
---|
| 1940 | }
|
---|
| 1941 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_INI))
|
---|
| 1942 | {
|
---|
| 1943 | inputaddr = (uint32_t)hcryp->pCrypInBuffPtr;
|
---|
| 1944 | /* Write the Input block in the IN FIFO */
|
---|
| 1945 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1946 | inputaddr+=4;
|
---|
| 1947 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1948 | inputaddr+=4;
|
---|
| 1949 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1950 | inputaddr+=4;
|
---|
| 1951 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 1952 | hcryp->pCrypInBuffPtr += 16;
|
---|
| 1953 | hcryp->CrypInCount -= 16;
|
---|
| 1954 | if(hcryp->CrypInCount == 0)
|
---|
| 1955 | {
|
---|
| 1956 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_INI);
|
---|
| 1957 | /* Call the Input data transfer complete callback */
|
---|
| 1958 | HAL_CRYP_InCpltCallback(hcryp);
|
---|
| 1959 | }
|
---|
| 1960 | }
|
---|
| 1961 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_OUTI))
|
---|
| 1962 | {
|
---|
| 1963 | outputaddr = (uint32_t)hcryp->pCrypOutBuffPtr;
|
---|
| 1964 | /* Read the Output block from the Output FIFO */
|
---|
| 1965 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1966 | outputaddr+=4;
|
---|
| 1967 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1968 | outputaddr+=4;
|
---|
| 1969 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1970 | outputaddr+=4;
|
---|
| 1971 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 1972 | hcryp->pCrypOutBuffPtr += 16;
|
---|
| 1973 | hcryp->CrypOutCount -= 16;
|
---|
| 1974 | if(hcryp->CrypOutCount == 0)
|
---|
| 1975 | {
|
---|
| 1976 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_OUTI);
|
---|
| 1977 | /* Process Unlocked */
|
---|
| 1978 | __HAL_UNLOCK(hcryp);
|
---|
| 1979 | /* Change the CRYP peripheral state */
|
---|
| 1980 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 1981 | /* Call Input transfer complete callback */
|
---|
| 1982 | HAL_CRYP_OutCpltCallback(hcryp);
|
---|
| 1983 | }
|
---|
| 1984 | }
|
---|
| 1985 |
|
---|
| 1986 | /* Return function status */
|
---|
| 1987 | return HAL_OK;
|
---|
| 1988 | }
|
---|
| 1989 |
|
---|
| 1990 | /**
|
---|
| 1991 | * @brief Initializes the CRYP peripheral in AES CCM decryption mode using interrupt
|
---|
| 1992 | * then decrypted pCypherData. The cypher data are available in pPlainData.
|
---|
| 1993 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 1994 | * the configuration information for CRYP module
|
---|
| 1995 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 1996 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 1997 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 1998 | * @retval HAL status
|
---|
| 1999 | */
|
---|
| 2000 | HAL_StatusTypeDef HAL_CRYPEx_AESCCM_Decrypt_IT(CRYP_HandleTypeDef *hcryp, uint8_t *pCypherData, uint16_t Size, uint8_t *pPlainData)
|
---|
| 2001 | {
|
---|
| 2002 | uint32_t inputaddr;
|
---|
| 2003 | uint32_t outputaddr;
|
---|
| 2004 | uint32_t tickstart = 0;
|
---|
| 2005 | uint32_t headersize = hcryp->Init.HeaderSize;
|
---|
| 2006 | uint32_t headeraddr = (uint32_t)hcryp->Init.Header;
|
---|
| 2007 | uint32_t loopcounter = 0;
|
---|
| 2008 | uint32_t bufferidx = 0;
|
---|
| 2009 | uint8_t blockb0[16] = {0};/* Block B0 */
|
---|
| 2010 | uint8_t ctr[16] = {0}; /* Counter */
|
---|
| 2011 | uint32_t b0addr = (uint32_t)blockb0;
|
---|
| 2012 |
|
---|
| 2013 | if(hcryp->State == HAL_CRYP_STATE_READY)
|
---|
| 2014 | {
|
---|
| 2015 | /* Process Locked */
|
---|
| 2016 | __HAL_LOCK(hcryp);
|
---|
| 2017 |
|
---|
| 2018 | hcryp->CrypInCount = Size;
|
---|
| 2019 | hcryp->pCrypInBuffPtr = pCypherData;
|
---|
| 2020 | hcryp->pCrypOutBuffPtr = pPlainData;
|
---|
| 2021 | hcryp->CrypOutCount = Size;
|
---|
| 2022 |
|
---|
| 2023 | /* Change the CRYP peripheral state */
|
---|
| 2024 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 2025 |
|
---|
| 2026 | /* Check if initialization phase has already been performed */
|
---|
| 2027 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 2028 | {
|
---|
| 2029 | /************************ Formatting the header block *******************/
|
---|
| 2030 | if(headersize != 0)
|
---|
| 2031 | {
|
---|
| 2032 | /* Check that the associated data (or header) length is lower than 2^16 - 2^8 = 65536 - 256 = 65280 */
|
---|
| 2033 | if(headersize < 65280)
|
---|
| 2034 | {
|
---|
| 2035 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize >> 8) & 0xFF);
|
---|
| 2036 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize) & 0xFF);
|
---|
| 2037 | headersize += 2;
|
---|
| 2038 | }
|
---|
| 2039 | else
|
---|
| 2040 | {
|
---|
| 2041 | /* Header is encoded as 0xff || 0xfe || [headersize]32, i.e., six octets */
|
---|
| 2042 | hcryp->Init.pScratch[bufferidx++] = 0xFF;
|
---|
| 2043 | hcryp->Init.pScratch[bufferidx++] = 0xFE;
|
---|
| 2044 | hcryp->Init.pScratch[bufferidx++] = headersize & 0xff000000;
|
---|
| 2045 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x00ff0000;
|
---|
| 2046 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x0000ff00;
|
---|
| 2047 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x000000ff;
|
---|
| 2048 | headersize += 6;
|
---|
| 2049 | }
|
---|
| 2050 | /* Copy the header buffer in internal buffer "hcryp->Init.pScratch" */
|
---|
| 2051 | for(loopcounter = 0; loopcounter < headersize; loopcounter++)
|
---|
| 2052 | {
|
---|
| 2053 | hcryp->Init.pScratch[bufferidx++] = hcryp->Init.Header[loopcounter];
|
---|
| 2054 | }
|
---|
| 2055 | /* Check if the header size is modulo 16 */
|
---|
| 2056 | if ((headersize % 16) != 0)
|
---|
| 2057 | {
|
---|
| 2058 | /* Padd the header buffer with 0s till the hcryp->Init.pScratch length is modulo 16 */
|
---|
| 2059 | for(loopcounter = headersize; loopcounter <= ((headersize/16) + 1) * 16; loopcounter++)
|
---|
| 2060 | {
|
---|
| 2061 | hcryp->Init.pScratch[loopcounter] = 0;
|
---|
| 2062 | }
|
---|
| 2063 | /* Set the header size to modulo 16 */
|
---|
| 2064 | headersize = ((headersize/16) + 1) * 16;
|
---|
| 2065 | }
|
---|
| 2066 | /* Set the pointer headeraddr to hcryp->Init.pScratch */
|
---|
| 2067 | headeraddr = (uint32_t)hcryp->Init.pScratch;
|
---|
| 2068 | }
|
---|
| 2069 | /*********************** Formatting the block B0 ************************/
|
---|
| 2070 | if(headersize != 0)
|
---|
| 2071 | {
|
---|
| 2072 | blockb0[0] = 0x40;
|
---|
| 2073 | }
|
---|
| 2074 | /* Flags byte */
|
---|
| 2075 | /* blockb0[0] |= 0u | (((( (uint8_t) hcryp->Init.TagSize - 2) / 2) & 0x07 ) << 3 ) | ( ( (uint8_t) (15 - hcryp->Init.IVSize) - 1) & 0x07) */
|
---|
| 2076 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)(((uint8_t)(hcryp->Init.TagSize - (uint8_t)(2))) >> 1) & (uint8_t)0x07 ) << 3);
|
---|
| 2077 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)((uint8_t)(15) - hcryp->Init.IVSize) - (uint8_t)1) & (uint8_t)0x07);
|
---|
| 2078 |
|
---|
| 2079 | for (loopcounter = 0; loopcounter < hcryp->Init.IVSize; loopcounter++)
|
---|
| 2080 | {
|
---|
| 2081 | blockb0[loopcounter+1] = hcryp->Init.pInitVect[loopcounter];
|
---|
| 2082 | }
|
---|
| 2083 | for ( ; loopcounter < 13; loopcounter++)
|
---|
| 2084 | {
|
---|
| 2085 | blockb0[loopcounter+1] = 0;
|
---|
| 2086 | }
|
---|
| 2087 |
|
---|
| 2088 | blockb0[14] = (Size >> 8);
|
---|
| 2089 | blockb0[15] = (Size & 0xFF);
|
---|
| 2090 |
|
---|
| 2091 | /************************* Formatting the initial counter ***************/
|
---|
| 2092 | /* Byte 0:
|
---|
| 2093 | Bits 7 and 6 are reserved and shall be set to 0
|
---|
| 2094 | Bits 3, 4, and 5 shall also be set to 0, to ensure that all the counter
|
---|
| 2095 | blocks are distinct from B0
|
---|
| 2096 | Bits 0, 1, and 2 contain the same encoding of q as in B0
|
---|
| 2097 | */
|
---|
| 2098 | ctr[0] = blockb0[0] & 0x07;
|
---|
| 2099 | /* byte 1 to NonceSize is the IV (Nonce) */
|
---|
| 2100 | for(loopcounter = 1; loopcounter < hcryp->Init.IVSize + 1; loopcounter++)
|
---|
| 2101 | {
|
---|
| 2102 | ctr[loopcounter] = blockb0[loopcounter];
|
---|
| 2103 | }
|
---|
| 2104 | /* Set the LSB to 1 */
|
---|
| 2105 | ctr[15] |= 0x01;
|
---|
| 2106 |
|
---|
| 2107 | /* Set the key */
|
---|
| 2108 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 2109 |
|
---|
| 2110 | /* Set the CRYP peripheral in AES CCM mode */
|
---|
| 2111 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_CCM_DECRYPT);
|
---|
| 2112 |
|
---|
| 2113 | /* Set the Initialization Vector */
|
---|
| 2114 | CRYPEx_GCMCCM_SetInitVector(hcryp, ctr);
|
---|
| 2115 |
|
---|
| 2116 | /* Select init phase */
|
---|
| 2117 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_INIT);
|
---|
| 2118 |
|
---|
| 2119 | b0addr = (uint32_t)blockb0;
|
---|
| 2120 | /* Write the blockb0 block in the IN FIFO */
|
---|
| 2121 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2122 | b0addr+=4;
|
---|
| 2123 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2124 | b0addr+=4;
|
---|
| 2125 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2126 | b0addr+=4;
|
---|
| 2127 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2128 |
|
---|
| 2129 | /* Enable the CRYP peripheral */
|
---|
| 2130 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2131 |
|
---|
| 2132 | /* Get tick */
|
---|
| 2133 | tickstart = HAL_GetTick();
|
---|
| 2134 |
|
---|
| 2135 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 2136 | {
|
---|
| 2137 | /* Check for the Timeout */
|
---|
| 2138 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2139 | {
|
---|
| 2140 | /* Change state */
|
---|
| 2141 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2142 |
|
---|
| 2143 | /* Process Unlocked */
|
---|
| 2144 | __HAL_UNLOCK(hcryp);
|
---|
| 2145 |
|
---|
| 2146 | return HAL_TIMEOUT;
|
---|
| 2147 | }
|
---|
| 2148 | }
|
---|
| 2149 | /***************************** Header phase *****************************/
|
---|
| 2150 | if(headersize != 0)
|
---|
| 2151 | {
|
---|
| 2152 | /* Select header phase */
|
---|
| 2153 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_HEADER);
|
---|
| 2154 |
|
---|
| 2155 | /* Enable Crypto processor */
|
---|
| 2156 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2157 |
|
---|
| 2158 | for(loopcounter = 0; (loopcounter < headersize); loopcounter+=16)
|
---|
| 2159 | {
|
---|
| 2160 | /* Get tick */
|
---|
| 2161 | tickstart = HAL_GetTick();
|
---|
| 2162 |
|
---|
| 2163 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_IFEM))
|
---|
| 2164 | {
|
---|
| 2165 | /* Check for the Timeout */
|
---|
| 2166 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2167 | {
|
---|
| 2168 | /* Change state */
|
---|
| 2169 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2170 |
|
---|
| 2171 | /* Process Unlocked */
|
---|
| 2172 | __HAL_UNLOCK(hcryp);
|
---|
| 2173 |
|
---|
| 2174 | return HAL_TIMEOUT;
|
---|
| 2175 | }
|
---|
| 2176 | }
|
---|
| 2177 | /* Write the header block in the IN FIFO */
|
---|
| 2178 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2179 | headeraddr+=4;
|
---|
| 2180 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2181 | headeraddr+=4;
|
---|
| 2182 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2183 | headeraddr+=4;
|
---|
| 2184 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2185 | headeraddr+=4;
|
---|
| 2186 | }
|
---|
| 2187 |
|
---|
| 2188 | /* Get tick */
|
---|
| 2189 | tickstart = HAL_GetTick();
|
---|
| 2190 |
|
---|
| 2191 | while((hcryp->Instance->SR & CRYP_FLAG_BUSY) == CRYP_FLAG_BUSY)
|
---|
| 2192 | {
|
---|
| 2193 | /* Check for the Timeout */
|
---|
| 2194 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2195 | {
|
---|
| 2196 | /* Change state */
|
---|
| 2197 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2198 |
|
---|
| 2199 | /* Process Unlocked */
|
---|
| 2200 | __HAL_UNLOCK(hcryp);
|
---|
| 2201 |
|
---|
| 2202 | return HAL_TIMEOUT;
|
---|
| 2203 | }
|
---|
| 2204 | }
|
---|
| 2205 | }
|
---|
| 2206 | /* Save formatted counter into the scratch buffer pScratch */
|
---|
| 2207 | for(loopcounter = 0; (loopcounter < 16); loopcounter++)
|
---|
| 2208 | {
|
---|
| 2209 | hcryp->Init.pScratch[loopcounter] = ctr[loopcounter];
|
---|
| 2210 | }
|
---|
| 2211 | /* Reset bit 0 */
|
---|
| 2212 | hcryp->Init.pScratch[15] &= 0xfe;
|
---|
| 2213 | /* Select payload phase once the header phase is performed */
|
---|
| 2214 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 2215 |
|
---|
| 2216 | /* Flush FIFO */
|
---|
| 2217 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 2218 |
|
---|
| 2219 | /* Set the phase */
|
---|
| 2220 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 2221 | }
|
---|
| 2222 |
|
---|
| 2223 | /* Enable Interrupts */
|
---|
| 2224 | __HAL_CRYP_ENABLE_IT(hcryp, CRYP_IT_INI | CRYP_IT_OUTI);
|
---|
| 2225 |
|
---|
| 2226 | /* Enable the CRYP peripheral */
|
---|
| 2227 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2228 |
|
---|
| 2229 | /* Return function status */
|
---|
| 2230 | return HAL_OK;
|
---|
| 2231 | }
|
---|
| 2232 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_INI))
|
---|
| 2233 | {
|
---|
| 2234 | inputaddr = (uint32_t)hcryp->pCrypInBuffPtr;
|
---|
| 2235 | /* Write the Input block in the IN FIFO */
|
---|
| 2236 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 2237 | inputaddr+=4;
|
---|
| 2238 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 2239 | inputaddr+=4;
|
---|
| 2240 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 2241 | inputaddr+=4;
|
---|
| 2242 | hcryp->Instance->DR = *(uint32_t*)(inputaddr);
|
---|
| 2243 | hcryp->pCrypInBuffPtr += 16;
|
---|
| 2244 | hcryp->CrypInCount -= 16;
|
---|
| 2245 | if(hcryp->CrypInCount == 0)
|
---|
| 2246 | {
|
---|
| 2247 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_INI);
|
---|
| 2248 | /* Call the Input data transfer complete callback */
|
---|
| 2249 | HAL_CRYP_InCpltCallback(hcryp);
|
---|
| 2250 | }
|
---|
| 2251 | }
|
---|
| 2252 | else if (__HAL_CRYP_GET_IT(hcryp, CRYP_IT_OUTI))
|
---|
| 2253 | {
|
---|
| 2254 | outputaddr = (uint32_t)hcryp->pCrypOutBuffPtr;
|
---|
| 2255 | /* Read the Output block from the Output FIFO */
|
---|
| 2256 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 2257 | outputaddr+=4;
|
---|
| 2258 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 2259 | outputaddr+=4;
|
---|
| 2260 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 2261 | outputaddr+=4;
|
---|
| 2262 | *(uint32_t*)(outputaddr) = hcryp->Instance->DOUT;
|
---|
| 2263 | hcryp->pCrypOutBuffPtr += 16;
|
---|
| 2264 | hcryp->CrypOutCount -= 16;
|
---|
| 2265 | if(hcryp->CrypOutCount == 0)
|
---|
| 2266 | {
|
---|
| 2267 | __HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_OUTI);
|
---|
| 2268 | /* Process Unlocked */
|
---|
| 2269 | __HAL_UNLOCK(hcryp);
|
---|
| 2270 | /* Change the CRYP peripheral state */
|
---|
| 2271 | hcryp->State = HAL_CRYP_STATE_READY;
|
---|
| 2272 | /* Call Input transfer complete callback */
|
---|
| 2273 | HAL_CRYP_OutCpltCallback(hcryp);
|
---|
| 2274 | }
|
---|
| 2275 | }
|
---|
| 2276 |
|
---|
| 2277 | /* Return function status */
|
---|
| 2278 | return HAL_OK;
|
---|
| 2279 | }
|
---|
| 2280 |
|
---|
| 2281 | /**
|
---|
| 2282 | * @brief Initializes the CRYP peripheral in AES GCM encryption mode using DMA.
|
---|
| 2283 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 2284 | * the configuration information for CRYP module
|
---|
| 2285 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 2286 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 2287 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 2288 | * @retval HAL status
|
---|
| 2289 | */
|
---|
| 2290 | HAL_StatusTypeDef HAL_CRYPEx_AESGCM_Encrypt_DMA(CRYP_HandleTypeDef *hcryp, uint8_t *pPlainData, uint16_t Size, uint8_t *pCypherData)
|
---|
| 2291 | {
|
---|
| 2292 | uint32_t tickstart = 0;
|
---|
| 2293 | uint32_t inputaddr;
|
---|
| 2294 | uint32_t outputaddr;
|
---|
| 2295 |
|
---|
| 2296 | if((hcryp->State == HAL_CRYP_STATE_READY) || (hcryp->Phase == HAL_CRYP_PHASE_PROCESS))
|
---|
| 2297 | {
|
---|
| 2298 | /* Process Locked */
|
---|
| 2299 | __HAL_LOCK(hcryp);
|
---|
| 2300 |
|
---|
| 2301 | inputaddr = (uint32_t)pPlainData;
|
---|
| 2302 | outputaddr = (uint32_t)pCypherData;
|
---|
| 2303 |
|
---|
| 2304 | /* Change the CRYP peripheral state */
|
---|
| 2305 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 2306 |
|
---|
| 2307 | /* Check if initialization phase has already been performed */
|
---|
| 2308 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 2309 | {
|
---|
| 2310 | /* Set the key */
|
---|
| 2311 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 2312 |
|
---|
| 2313 | /* Set the CRYP peripheral in AES GCM mode */
|
---|
| 2314 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_GCM_ENCRYPT);
|
---|
| 2315 |
|
---|
| 2316 | /* Set the Initialization Vector */
|
---|
| 2317 | CRYPEx_GCMCCM_SetInitVector(hcryp, hcryp->Init.pInitVect);
|
---|
| 2318 |
|
---|
| 2319 | /* Flush FIFO */
|
---|
| 2320 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 2321 |
|
---|
| 2322 | /* Enable CRYP to start the init phase */
|
---|
| 2323 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2324 |
|
---|
| 2325 | /* Get tick */
|
---|
| 2326 | tickstart = HAL_GetTick();
|
---|
| 2327 |
|
---|
| 2328 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 2329 | {
|
---|
| 2330 | /* Check for the Timeout */
|
---|
| 2331 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2332 | {
|
---|
| 2333 | /* Change state */
|
---|
| 2334 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2335 |
|
---|
| 2336 | /* Process Unlocked */
|
---|
| 2337 | __HAL_UNLOCK(hcryp);
|
---|
| 2338 |
|
---|
| 2339 | return HAL_TIMEOUT;
|
---|
| 2340 | }
|
---|
| 2341 | }
|
---|
| 2342 | /* Flush FIFO */
|
---|
| 2343 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 2344 |
|
---|
| 2345 | /* Set the header phase */
|
---|
| 2346 | if(CRYPEx_GCMCCM_SetHeaderPhase(hcryp, hcryp->Init.Header, hcryp->Init.HeaderSize, 1) != HAL_OK)
|
---|
| 2347 | {
|
---|
| 2348 | return HAL_TIMEOUT;
|
---|
| 2349 | }
|
---|
| 2350 | /* Disable the CRYP peripheral */
|
---|
| 2351 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 2352 |
|
---|
| 2353 | /* Select payload phase once the header phase is performed */
|
---|
| 2354 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 2355 |
|
---|
| 2356 | /* Flush FIFO */
|
---|
| 2357 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 2358 |
|
---|
| 2359 | /* Set the phase */
|
---|
| 2360 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 2361 | }
|
---|
| 2362 |
|
---|
| 2363 | /* Set the input and output addresses and start DMA transfer */
|
---|
| 2364 | CRYPEx_GCMCCM_SetDMAConfig(hcryp, inputaddr, Size, outputaddr);
|
---|
| 2365 |
|
---|
| 2366 | /* Unlock process */
|
---|
| 2367 | __HAL_UNLOCK(hcryp);
|
---|
| 2368 |
|
---|
| 2369 | /* Return function status */
|
---|
| 2370 | return HAL_OK;
|
---|
| 2371 | }
|
---|
| 2372 | else
|
---|
| 2373 | {
|
---|
| 2374 | return HAL_ERROR;
|
---|
| 2375 | }
|
---|
| 2376 | }
|
---|
| 2377 |
|
---|
| 2378 | /**
|
---|
| 2379 | * @brief Initializes the CRYP peripheral in AES CCM encryption mode using interrupt.
|
---|
| 2380 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 2381 | * the configuration information for CRYP module
|
---|
| 2382 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 2383 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 2384 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 2385 | * @retval HAL status
|
---|
| 2386 | */
|
---|
| 2387 | HAL_StatusTypeDef HAL_CRYPEx_AESCCM_Encrypt_DMA(CRYP_HandleTypeDef *hcryp, uint8_t *pPlainData, uint16_t Size, uint8_t *pCypherData)
|
---|
| 2388 | {
|
---|
| 2389 | uint32_t tickstart = 0;
|
---|
| 2390 | uint32_t inputaddr;
|
---|
| 2391 | uint32_t outputaddr;
|
---|
| 2392 | uint32_t headersize;
|
---|
| 2393 | uint32_t headeraddr;
|
---|
| 2394 | uint32_t loopcounter = 0;
|
---|
| 2395 | uint32_t bufferidx = 0;
|
---|
| 2396 | uint8_t blockb0[16] = {0};/* Block B0 */
|
---|
| 2397 | uint8_t ctr[16] = {0}; /* Counter */
|
---|
| 2398 | uint32_t b0addr = (uint32_t)blockb0;
|
---|
| 2399 |
|
---|
| 2400 | if((hcryp->State == HAL_CRYP_STATE_READY) || (hcryp->Phase == HAL_CRYP_PHASE_PROCESS))
|
---|
| 2401 | {
|
---|
| 2402 | /* Process Locked */
|
---|
| 2403 | __HAL_LOCK(hcryp);
|
---|
| 2404 |
|
---|
| 2405 | inputaddr = (uint32_t)pPlainData;
|
---|
| 2406 | outputaddr = (uint32_t)pCypherData;
|
---|
| 2407 |
|
---|
| 2408 | headersize = hcryp->Init.HeaderSize;
|
---|
| 2409 | headeraddr = (uint32_t)hcryp->Init.Header;
|
---|
| 2410 |
|
---|
| 2411 | hcryp->CrypInCount = Size;
|
---|
| 2412 | hcryp->pCrypInBuffPtr = pPlainData;
|
---|
| 2413 | hcryp->pCrypOutBuffPtr = pCypherData;
|
---|
| 2414 | hcryp->CrypOutCount = Size;
|
---|
| 2415 |
|
---|
| 2416 | /* Change the CRYP peripheral state */
|
---|
| 2417 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 2418 |
|
---|
| 2419 | /* Check if initialization phase has already been performed */
|
---|
| 2420 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 2421 | {
|
---|
| 2422 | /************************ Formatting the header block *******************/
|
---|
| 2423 | if(headersize != 0)
|
---|
| 2424 | {
|
---|
| 2425 | /* Check that the associated data (or header) length is lower than 2^16 - 2^8 = 65536 - 256 = 65280 */
|
---|
| 2426 | if(headersize < 65280)
|
---|
| 2427 | {
|
---|
| 2428 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize >> 8) & 0xFF);
|
---|
| 2429 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize) & 0xFF);
|
---|
| 2430 | headersize += 2;
|
---|
| 2431 | }
|
---|
| 2432 | else
|
---|
| 2433 | {
|
---|
| 2434 | /* Header is encoded as 0xff || 0xfe || [headersize]32, i.e., six octets */
|
---|
| 2435 | hcryp->Init.pScratch[bufferidx++] = 0xFF;
|
---|
| 2436 | hcryp->Init.pScratch[bufferidx++] = 0xFE;
|
---|
| 2437 | hcryp->Init.pScratch[bufferidx++] = headersize & 0xff000000;
|
---|
| 2438 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x00ff0000;
|
---|
| 2439 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x0000ff00;
|
---|
| 2440 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x000000ff;
|
---|
| 2441 | headersize += 6;
|
---|
| 2442 | }
|
---|
| 2443 | /* Copy the header buffer in internal buffer "hcryp->Init.pScratch" */
|
---|
| 2444 | for(loopcounter = 0; loopcounter < headersize; loopcounter++)
|
---|
| 2445 | {
|
---|
| 2446 | hcryp->Init.pScratch[bufferidx++] = hcryp->Init.Header[loopcounter];
|
---|
| 2447 | }
|
---|
| 2448 | /* Check if the header size is modulo 16 */
|
---|
| 2449 | if ((headersize % 16) != 0)
|
---|
| 2450 | {
|
---|
| 2451 | /* Padd the header buffer with 0s till the hcryp->Init.pScratch length is modulo 16 */
|
---|
| 2452 | for(loopcounter = headersize; loopcounter <= ((headersize/16) + 1) * 16; loopcounter++)
|
---|
| 2453 | {
|
---|
| 2454 | hcryp->Init.pScratch[loopcounter] = 0;
|
---|
| 2455 | }
|
---|
| 2456 | /* Set the header size to modulo 16 */
|
---|
| 2457 | headersize = ((headersize/16) + 1) * 16;
|
---|
| 2458 | }
|
---|
| 2459 | /* Set the pointer headeraddr to hcryp->Init.pScratch */
|
---|
| 2460 | headeraddr = (uint32_t)hcryp->Init.pScratch;
|
---|
| 2461 | }
|
---|
| 2462 | /*********************** Formatting the block B0 ************************/
|
---|
| 2463 | if(headersize != 0)
|
---|
| 2464 | {
|
---|
| 2465 | blockb0[0] = 0x40;
|
---|
| 2466 | }
|
---|
| 2467 | /* Flags byte */
|
---|
| 2468 | /* blockb0[0] |= 0u | (((( (uint8_t) hcryp->Init.TagSize - 2) / 2) & 0x07 ) << 3 ) | ( ( (uint8_t) (15 - hcryp->Init.IVSize) - 1) & 0x07) */
|
---|
| 2469 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)(((uint8_t)(hcryp->Init.TagSize - (uint8_t)(2))) >> 1) & (uint8_t)0x07 ) << 3);
|
---|
| 2470 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)((uint8_t)(15) - hcryp->Init.IVSize) - (uint8_t)1) & (uint8_t)0x07);
|
---|
| 2471 |
|
---|
| 2472 | for (loopcounter = 0; loopcounter < hcryp->Init.IVSize; loopcounter++)
|
---|
| 2473 | {
|
---|
| 2474 | blockb0[loopcounter+1] = hcryp->Init.pInitVect[loopcounter];
|
---|
| 2475 | }
|
---|
| 2476 | for ( ; loopcounter < 13; loopcounter++)
|
---|
| 2477 | {
|
---|
| 2478 | blockb0[loopcounter+1] = 0;
|
---|
| 2479 | }
|
---|
| 2480 |
|
---|
| 2481 | blockb0[14] = (Size >> 8);
|
---|
| 2482 | blockb0[15] = (Size & 0xFF);
|
---|
| 2483 |
|
---|
| 2484 | /************************* Formatting the initial counter ***************/
|
---|
| 2485 | /* Byte 0:
|
---|
| 2486 | Bits 7 and 6 are reserved and shall be set to 0
|
---|
| 2487 | Bits 3, 4, and 5 shall also be set to 0, to ensure that all the counter
|
---|
| 2488 | blocks are distinct from B0
|
---|
| 2489 | Bits 0, 1, and 2 contain the same encoding of q as in B0
|
---|
| 2490 | */
|
---|
| 2491 | ctr[0] = blockb0[0] & 0x07;
|
---|
| 2492 | /* byte 1 to NonceSize is the IV (Nonce) */
|
---|
| 2493 | for(loopcounter = 1; loopcounter < hcryp->Init.IVSize + 1; loopcounter++)
|
---|
| 2494 | {
|
---|
| 2495 | ctr[loopcounter] = blockb0[loopcounter];
|
---|
| 2496 | }
|
---|
| 2497 | /* Set the LSB to 1 */
|
---|
| 2498 | ctr[15] |= 0x01;
|
---|
| 2499 |
|
---|
| 2500 | /* Set the key */
|
---|
| 2501 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 2502 |
|
---|
| 2503 | /* Set the CRYP peripheral in AES CCM mode */
|
---|
| 2504 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_CCM_ENCRYPT);
|
---|
| 2505 |
|
---|
| 2506 | /* Set the Initialization Vector */
|
---|
| 2507 | CRYPEx_GCMCCM_SetInitVector(hcryp, ctr);
|
---|
| 2508 |
|
---|
| 2509 | /* Select init phase */
|
---|
| 2510 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_INIT);
|
---|
| 2511 |
|
---|
| 2512 | b0addr = (uint32_t)blockb0;
|
---|
| 2513 | /* Write the blockb0 block in the IN FIFO */
|
---|
| 2514 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2515 | b0addr+=4;
|
---|
| 2516 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2517 | b0addr+=4;
|
---|
| 2518 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2519 | b0addr+=4;
|
---|
| 2520 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2521 |
|
---|
| 2522 | /* Enable the CRYP peripheral */
|
---|
| 2523 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2524 |
|
---|
| 2525 | /* Get tick */
|
---|
| 2526 | tickstart = HAL_GetTick();
|
---|
| 2527 |
|
---|
| 2528 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 2529 | {
|
---|
| 2530 | /* Check for the Timeout */
|
---|
| 2531 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2532 | {
|
---|
| 2533 | /* Change state */
|
---|
| 2534 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2535 |
|
---|
| 2536 | /* Process Unlocked */
|
---|
| 2537 | __HAL_UNLOCK(hcryp);
|
---|
| 2538 |
|
---|
| 2539 | return HAL_TIMEOUT;
|
---|
| 2540 | }
|
---|
| 2541 | }
|
---|
| 2542 | /***************************** Header phase *****************************/
|
---|
| 2543 | if(headersize != 0)
|
---|
| 2544 | {
|
---|
| 2545 | /* Select header phase */
|
---|
| 2546 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_HEADER);
|
---|
| 2547 |
|
---|
| 2548 | /* Enable Crypto processor */
|
---|
| 2549 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2550 |
|
---|
| 2551 | for(loopcounter = 0; (loopcounter < headersize); loopcounter+=16)
|
---|
| 2552 | {
|
---|
| 2553 | /* Get tick */
|
---|
| 2554 | tickstart = HAL_GetTick();
|
---|
| 2555 |
|
---|
| 2556 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_IFEM))
|
---|
| 2557 | {
|
---|
| 2558 | /* Check for the Timeout */
|
---|
| 2559 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2560 | {
|
---|
| 2561 | /* Change state */
|
---|
| 2562 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2563 |
|
---|
| 2564 | /* Process Unlocked */
|
---|
| 2565 | __HAL_UNLOCK(hcryp);
|
---|
| 2566 |
|
---|
| 2567 | return HAL_TIMEOUT;
|
---|
| 2568 | }
|
---|
| 2569 | }
|
---|
| 2570 | /* Write the header block in the IN FIFO */
|
---|
| 2571 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2572 | headeraddr+=4;
|
---|
| 2573 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2574 | headeraddr+=4;
|
---|
| 2575 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2576 | headeraddr+=4;
|
---|
| 2577 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2578 | headeraddr+=4;
|
---|
| 2579 | }
|
---|
| 2580 |
|
---|
| 2581 | /* Get tick */
|
---|
| 2582 | tickstart = HAL_GetTick();
|
---|
| 2583 |
|
---|
| 2584 | while((hcryp->Instance->SR & CRYP_FLAG_BUSY) == CRYP_FLAG_BUSY)
|
---|
| 2585 | {
|
---|
| 2586 | /* Check for the Timeout */
|
---|
| 2587 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2588 | {
|
---|
| 2589 | /* Change state */
|
---|
| 2590 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2591 |
|
---|
| 2592 | /* Process Unlocked */
|
---|
| 2593 | __HAL_UNLOCK(hcryp);
|
---|
| 2594 |
|
---|
| 2595 | return HAL_TIMEOUT;
|
---|
| 2596 | }
|
---|
| 2597 | }
|
---|
| 2598 | }
|
---|
| 2599 | /* Save formatted counter into the scratch buffer pScratch */
|
---|
| 2600 | for(loopcounter = 0; (loopcounter < 16); loopcounter++)
|
---|
| 2601 | {
|
---|
| 2602 | hcryp->Init.pScratch[loopcounter] = ctr[loopcounter];
|
---|
| 2603 | }
|
---|
| 2604 | /* Reset bit 0 */
|
---|
| 2605 | hcryp->Init.pScratch[15] &= 0xfe;
|
---|
| 2606 |
|
---|
| 2607 | /* Select payload phase once the header phase is performed */
|
---|
| 2608 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 2609 |
|
---|
| 2610 | /* Flush FIFO */
|
---|
| 2611 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 2612 |
|
---|
| 2613 | /* Set the phase */
|
---|
| 2614 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 2615 | }
|
---|
| 2616 |
|
---|
| 2617 | /* Set the input and output addresses and start DMA transfer */
|
---|
| 2618 | CRYPEx_GCMCCM_SetDMAConfig(hcryp, inputaddr, Size, outputaddr);
|
---|
| 2619 |
|
---|
| 2620 | /* Unlock process */
|
---|
| 2621 | __HAL_UNLOCK(hcryp);
|
---|
| 2622 |
|
---|
| 2623 | /* Return function status */
|
---|
| 2624 | return HAL_OK;
|
---|
| 2625 | }
|
---|
| 2626 | else
|
---|
| 2627 | {
|
---|
| 2628 | return HAL_ERROR;
|
---|
| 2629 | }
|
---|
| 2630 | }
|
---|
| 2631 |
|
---|
| 2632 | /**
|
---|
| 2633 | * @brief Initializes the CRYP peripheral in AES GCM decryption mode using DMA.
|
---|
| 2634 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 2635 | * the configuration information for CRYP module
|
---|
| 2636 | * @param pCypherData: Pointer to the cyphertext buffer.
|
---|
| 2637 | * @param Size: Length of the cyphertext buffer, must be a multiple of 16
|
---|
| 2638 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 2639 | * @retval HAL status
|
---|
| 2640 | */
|
---|
| 2641 | HAL_StatusTypeDef HAL_CRYPEx_AESGCM_Decrypt_DMA(CRYP_HandleTypeDef *hcryp, uint8_t *pCypherData, uint16_t Size, uint8_t *pPlainData)
|
---|
| 2642 | {
|
---|
| 2643 | uint32_t tickstart = 0;
|
---|
| 2644 | uint32_t inputaddr;
|
---|
| 2645 | uint32_t outputaddr;
|
---|
| 2646 |
|
---|
| 2647 | if((hcryp->State == HAL_CRYP_STATE_READY) || (hcryp->Phase == HAL_CRYP_PHASE_PROCESS))
|
---|
| 2648 | {
|
---|
| 2649 | /* Process Locked */
|
---|
| 2650 | __HAL_LOCK(hcryp);
|
---|
| 2651 |
|
---|
| 2652 | inputaddr = (uint32_t)pCypherData;
|
---|
| 2653 | outputaddr = (uint32_t)pPlainData;
|
---|
| 2654 |
|
---|
| 2655 | /* Change the CRYP peripheral state */
|
---|
| 2656 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 2657 |
|
---|
| 2658 | /* Check if initialization phase has already been performed */
|
---|
| 2659 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 2660 | {
|
---|
| 2661 | /* Set the key */
|
---|
| 2662 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 2663 |
|
---|
| 2664 | /* Set the CRYP peripheral in AES GCM decryption mode */
|
---|
| 2665 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_GCM_DECRYPT);
|
---|
| 2666 |
|
---|
| 2667 | /* Set the Initialization Vector */
|
---|
| 2668 | CRYPEx_GCMCCM_SetInitVector(hcryp, hcryp->Init.pInitVect);
|
---|
| 2669 |
|
---|
| 2670 | /* Enable CRYP to start the init phase */
|
---|
| 2671 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2672 |
|
---|
| 2673 | /* Get tick */
|
---|
| 2674 | tickstart = HAL_GetTick();
|
---|
| 2675 |
|
---|
| 2676 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 2677 | {
|
---|
| 2678 | /* Check for the Timeout */
|
---|
| 2679 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2680 | {
|
---|
| 2681 | /* Change state */
|
---|
| 2682 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2683 |
|
---|
| 2684 | /* Process Unlocked */
|
---|
| 2685 | __HAL_UNLOCK(hcryp);
|
---|
| 2686 |
|
---|
| 2687 | return HAL_TIMEOUT;
|
---|
| 2688 | }
|
---|
| 2689 | }
|
---|
| 2690 |
|
---|
| 2691 | /* Set the header phase */
|
---|
| 2692 | if(CRYPEx_GCMCCM_SetHeaderPhase(hcryp, hcryp->Init.Header, hcryp->Init.HeaderSize, 1) != HAL_OK)
|
---|
| 2693 | {
|
---|
| 2694 | return HAL_TIMEOUT;
|
---|
| 2695 | }
|
---|
| 2696 | /* Disable the CRYP peripheral */
|
---|
| 2697 | __HAL_CRYP_DISABLE(hcryp);
|
---|
| 2698 |
|
---|
| 2699 | /* Select payload phase once the header phase is performed */
|
---|
| 2700 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 2701 |
|
---|
| 2702 | /* Set the phase */
|
---|
| 2703 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 2704 | }
|
---|
| 2705 |
|
---|
| 2706 | /* Set the input and output addresses and start DMA transfer */
|
---|
| 2707 | CRYPEx_GCMCCM_SetDMAConfig(hcryp, inputaddr, Size, outputaddr);
|
---|
| 2708 |
|
---|
| 2709 | /* Unlock process */
|
---|
| 2710 | __HAL_UNLOCK(hcryp);
|
---|
| 2711 |
|
---|
| 2712 | /* Return function status */
|
---|
| 2713 | return HAL_OK;
|
---|
| 2714 | }
|
---|
| 2715 | else
|
---|
| 2716 | {
|
---|
| 2717 | return HAL_ERROR;
|
---|
| 2718 | }
|
---|
| 2719 | }
|
---|
| 2720 |
|
---|
| 2721 | /**
|
---|
| 2722 | * @brief Initializes the CRYP peripheral in AES CCM decryption mode using DMA
|
---|
| 2723 | * then decrypted pCypherData. The cypher data are available in pPlainData.
|
---|
| 2724 | * @param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
|
---|
| 2725 | * the configuration information for CRYP module
|
---|
| 2726 | * @param pCypherData: Pointer to the cyphertext buffer
|
---|
| 2727 | * @param Size: Length of the plaintext buffer, must be a multiple of 16
|
---|
| 2728 | * @param pPlainData: Pointer to the plaintext buffer
|
---|
| 2729 | * @retval HAL status
|
---|
| 2730 | */
|
---|
| 2731 | HAL_StatusTypeDef HAL_CRYPEx_AESCCM_Decrypt_DMA(CRYP_HandleTypeDef *hcryp, uint8_t *pCypherData, uint16_t Size, uint8_t *pPlainData)
|
---|
| 2732 | {
|
---|
| 2733 | uint32_t tickstart = 0;
|
---|
| 2734 | uint32_t inputaddr;
|
---|
| 2735 | uint32_t outputaddr;
|
---|
| 2736 | uint32_t headersize;
|
---|
| 2737 | uint32_t headeraddr;
|
---|
| 2738 | uint32_t loopcounter = 0;
|
---|
| 2739 | uint32_t bufferidx = 0;
|
---|
| 2740 | uint8_t blockb0[16] = {0};/* Block B0 */
|
---|
| 2741 | uint8_t ctr[16] = {0}; /* Counter */
|
---|
| 2742 | uint32_t b0addr = (uint32_t)blockb0;
|
---|
| 2743 |
|
---|
| 2744 | if((hcryp->State == HAL_CRYP_STATE_READY) || (hcryp->Phase == HAL_CRYP_PHASE_PROCESS))
|
---|
| 2745 | {
|
---|
| 2746 | /* Process Locked */
|
---|
| 2747 | __HAL_LOCK(hcryp);
|
---|
| 2748 |
|
---|
| 2749 | inputaddr = (uint32_t)pCypherData;
|
---|
| 2750 | outputaddr = (uint32_t)pPlainData;
|
---|
| 2751 |
|
---|
| 2752 | headersize = hcryp->Init.HeaderSize;
|
---|
| 2753 | headeraddr = (uint32_t)hcryp->Init.Header;
|
---|
| 2754 |
|
---|
| 2755 | hcryp->CrypInCount = Size;
|
---|
| 2756 | hcryp->pCrypInBuffPtr = pCypherData;
|
---|
| 2757 | hcryp->pCrypOutBuffPtr = pPlainData;
|
---|
| 2758 | hcryp->CrypOutCount = Size;
|
---|
| 2759 |
|
---|
| 2760 | /* Change the CRYP peripheral state */
|
---|
| 2761 | hcryp->State = HAL_CRYP_STATE_BUSY;
|
---|
| 2762 |
|
---|
| 2763 | /* Check if initialization phase has already been performed */
|
---|
| 2764 | if(hcryp->Phase == HAL_CRYP_PHASE_READY)
|
---|
| 2765 | {
|
---|
| 2766 | /************************ Formatting the header block *******************/
|
---|
| 2767 | if(headersize != 0)
|
---|
| 2768 | {
|
---|
| 2769 | /* Check that the associated data (or header) length is lower than 2^16 - 2^8 = 65536 - 256 = 65280 */
|
---|
| 2770 | if(headersize < 65280)
|
---|
| 2771 | {
|
---|
| 2772 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize >> 8) & 0xFF);
|
---|
| 2773 | hcryp->Init.pScratch[bufferidx++] = (uint8_t) ((headersize) & 0xFF);
|
---|
| 2774 | headersize += 2;
|
---|
| 2775 | }
|
---|
| 2776 | else
|
---|
| 2777 | {
|
---|
| 2778 | /* Header is encoded as 0xff || 0xfe || [headersize]32, i.e., six octets */
|
---|
| 2779 | hcryp->Init.pScratch[bufferidx++] = 0xFF;
|
---|
| 2780 | hcryp->Init.pScratch[bufferidx++] = 0xFE;
|
---|
| 2781 | hcryp->Init.pScratch[bufferidx++] = headersize & 0xff000000;
|
---|
| 2782 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x00ff0000;
|
---|
| 2783 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x0000ff00;
|
---|
| 2784 | hcryp->Init.pScratch[bufferidx++] = headersize & 0x000000ff;
|
---|
| 2785 | headersize += 6;
|
---|
| 2786 | }
|
---|
| 2787 | /* Copy the header buffer in internal buffer "hcryp->Init.pScratch" */
|
---|
| 2788 | for(loopcounter = 0; loopcounter < headersize; loopcounter++)
|
---|
| 2789 | {
|
---|
| 2790 | hcryp->Init.pScratch[bufferidx++] = hcryp->Init.Header[loopcounter];
|
---|
| 2791 | }
|
---|
| 2792 | /* Check if the header size is modulo 16 */
|
---|
| 2793 | if ((headersize % 16) != 0)
|
---|
| 2794 | {
|
---|
| 2795 | /* Padd the header buffer with 0s till the hcryp->Init.pScratch length is modulo 16 */
|
---|
| 2796 | for(loopcounter = headersize; loopcounter <= ((headersize/16) + 1) * 16; loopcounter++)
|
---|
| 2797 | {
|
---|
| 2798 | hcryp->Init.pScratch[loopcounter] = 0;
|
---|
| 2799 | }
|
---|
| 2800 | /* Set the header size to modulo 16 */
|
---|
| 2801 | headersize = ((headersize/16) + 1) * 16;
|
---|
| 2802 | }
|
---|
| 2803 | /* Set the pointer headeraddr to hcryp->Init.pScratch */
|
---|
| 2804 | headeraddr = (uint32_t)hcryp->Init.pScratch;
|
---|
| 2805 | }
|
---|
| 2806 | /*********************** Formatting the block B0 ************************/
|
---|
| 2807 | if(headersize != 0)
|
---|
| 2808 | {
|
---|
| 2809 | blockb0[0] = 0x40;
|
---|
| 2810 | }
|
---|
| 2811 | /* Flags byte */
|
---|
| 2812 | /* blockb0[0] |= 0u | (((( (uint8_t) hcryp->Init.TagSize - 2) / 2) & 0x07 ) << 3 ) | ( ( (uint8_t) (15 - hcryp->Init.IVSize) - 1) & 0x07) */
|
---|
| 2813 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)(((uint8_t)(hcryp->Init.TagSize - (uint8_t)(2))) >> 1) & (uint8_t)0x07 ) << 3);
|
---|
| 2814 | blockb0[0] |= (uint8_t)((uint8_t)((uint8_t)((uint8_t)(15) - hcryp->Init.IVSize) - (uint8_t)1) & (uint8_t)0x07);
|
---|
| 2815 |
|
---|
| 2816 | for (loopcounter = 0; loopcounter < hcryp->Init.IVSize; loopcounter++)
|
---|
| 2817 | {
|
---|
| 2818 | blockb0[loopcounter+1] = hcryp->Init.pInitVect[loopcounter];
|
---|
| 2819 | }
|
---|
| 2820 | for ( ; loopcounter < 13; loopcounter++)
|
---|
| 2821 | {
|
---|
| 2822 | blockb0[loopcounter+1] = 0;
|
---|
| 2823 | }
|
---|
| 2824 |
|
---|
| 2825 | blockb0[14] = (Size >> 8);
|
---|
| 2826 | blockb0[15] = (Size & 0xFF);
|
---|
| 2827 |
|
---|
| 2828 | /************************* Formatting the initial counter ***************/
|
---|
| 2829 | /* Byte 0:
|
---|
| 2830 | Bits 7 and 6 are reserved and shall be set to 0
|
---|
| 2831 | Bits 3, 4, and 5 shall also be set to 0, to ensure that all the counter
|
---|
| 2832 | blocks are distinct from B0
|
---|
| 2833 | Bits 0, 1, and 2 contain the same encoding of q as in B0
|
---|
| 2834 | */
|
---|
| 2835 | ctr[0] = blockb0[0] & 0x07;
|
---|
| 2836 | /* byte 1 to NonceSize is the IV (Nonce) */
|
---|
| 2837 | for(loopcounter = 1; loopcounter < hcryp->Init.IVSize + 1; loopcounter++)
|
---|
| 2838 | {
|
---|
| 2839 | ctr[loopcounter] = blockb0[loopcounter];
|
---|
| 2840 | }
|
---|
| 2841 | /* Set the LSB to 1 */
|
---|
| 2842 | ctr[15] |= 0x01;
|
---|
| 2843 |
|
---|
| 2844 | /* Set the key */
|
---|
| 2845 | CRYPEx_GCMCCM_SetKey(hcryp, hcryp->Init.pKey, hcryp->Init.KeySize);
|
---|
| 2846 |
|
---|
| 2847 | /* Set the CRYP peripheral in AES CCM mode */
|
---|
| 2848 | __HAL_CRYP_SET_MODE(hcryp, CRYP_CR_ALGOMODE_AES_CCM_DECRYPT);
|
---|
| 2849 |
|
---|
| 2850 | /* Set the Initialization Vector */
|
---|
| 2851 | CRYPEx_GCMCCM_SetInitVector(hcryp, ctr);
|
---|
| 2852 |
|
---|
| 2853 | /* Select init phase */
|
---|
| 2854 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_INIT);
|
---|
| 2855 |
|
---|
| 2856 | b0addr = (uint32_t)blockb0;
|
---|
| 2857 | /* Write the blockb0 block in the IN FIFO */
|
---|
| 2858 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2859 | b0addr+=4;
|
---|
| 2860 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2861 | b0addr+=4;
|
---|
| 2862 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2863 | b0addr+=4;
|
---|
| 2864 | hcryp->Instance->DR = *(uint32_t*)(b0addr);
|
---|
| 2865 |
|
---|
| 2866 | /* Enable the CRYP peripheral */
|
---|
| 2867 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2868 |
|
---|
| 2869 | /* Get tick */
|
---|
| 2870 | tickstart = HAL_GetTick();
|
---|
| 2871 |
|
---|
| 2872 | while((CRYP->CR & CRYP_CR_CRYPEN) == CRYP_CR_CRYPEN)
|
---|
| 2873 | {
|
---|
| 2874 | /* Check for the Timeout */
|
---|
| 2875 |
|
---|
| 2876 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2877 | {
|
---|
| 2878 | /* Change state */
|
---|
| 2879 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2880 |
|
---|
| 2881 | /* Process Unlocked */
|
---|
| 2882 | __HAL_UNLOCK(hcryp);
|
---|
| 2883 |
|
---|
| 2884 | return HAL_TIMEOUT;
|
---|
| 2885 |
|
---|
| 2886 | }
|
---|
| 2887 | }
|
---|
| 2888 | /***************************** Header phase *****************************/
|
---|
| 2889 | if(headersize != 0)
|
---|
| 2890 | {
|
---|
| 2891 | /* Select header phase */
|
---|
| 2892 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_HEADER);
|
---|
| 2893 |
|
---|
| 2894 | /* Enable Crypto processor */
|
---|
| 2895 | __HAL_CRYP_ENABLE(hcryp);
|
---|
| 2896 |
|
---|
| 2897 | for(loopcounter = 0; (loopcounter < headersize); loopcounter+=16)
|
---|
| 2898 | {
|
---|
| 2899 | /* Get tick */
|
---|
| 2900 | tickstart = HAL_GetTick();
|
---|
| 2901 |
|
---|
| 2902 | while(HAL_IS_BIT_CLR(hcryp->Instance->SR, CRYP_FLAG_IFEM))
|
---|
| 2903 | {
|
---|
| 2904 | /* Check for the Timeout */
|
---|
| 2905 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2906 | {
|
---|
| 2907 | /* Change state */
|
---|
| 2908 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2909 |
|
---|
| 2910 | /* Process Unlocked */
|
---|
| 2911 | __HAL_UNLOCK(hcryp);
|
---|
| 2912 |
|
---|
| 2913 | return HAL_TIMEOUT;
|
---|
| 2914 | }
|
---|
| 2915 | }
|
---|
| 2916 | /* Write the header block in the IN FIFO */
|
---|
| 2917 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2918 | headeraddr+=4;
|
---|
| 2919 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2920 | headeraddr+=4;
|
---|
| 2921 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2922 | headeraddr+=4;
|
---|
| 2923 | hcryp->Instance->DR = *(uint32_t*)(headeraddr);
|
---|
| 2924 | headeraddr+=4;
|
---|
| 2925 | }
|
---|
| 2926 |
|
---|
| 2927 | /* Get tick */
|
---|
| 2928 | tickstart = HAL_GetTick();
|
---|
| 2929 |
|
---|
| 2930 | while((hcryp->Instance->SR & CRYP_FLAG_BUSY) == CRYP_FLAG_BUSY)
|
---|
| 2931 | {
|
---|
| 2932 | /* Check for the Timeout */
|
---|
| 2933 | if((HAL_GetTick() - tickstart ) > CRYPEx_TIMEOUT_VALUE)
|
---|
| 2934 | {
|
---|
| 2935 | /* Change state */
|
---|
| 2936 | hcryp->State = HAL_CRYP_STATE_TIMEOUT;
|
---|
| 2937 |
|
---|
| 2938 | /* Process Unlocked */
|
---|
| 2939 | __HAL_UNLOCK(hcryp);
|
---|
| 2940 |
|
---|
| 2941 | return HAL_TIMEOUT;
|
---|
| 2942 | }
|
---|
| 2943 | }
|
---|
| 2944 | }
|
---|
| 2945 | /* Save formatted counter into the scratch buffer pScratch */
|
---|
| 2946 | for(loopcounter = 0; (loopcounter < 16); loopcounter++)
|
---|
| 2947 | {
|
---|
| 2948 | hcryp->Init.pScratch[loopcounter] = ctr[loopcounter];
|
---|
| 2949 | }
|
---|
| 2950 | /* Reset bit 0 */
|
---|
| 2951 | hcryp->Init.pScratch[15] &= 0xfe;
|
---|
| 2952 | /* Select payload phase once the header phase is performed */
|
---|
| 2953 | __HAL_CRYP_SET_PHASE(hcryp, CRYP_PHASE_PAYLOAD);
|
---|
| 2954 |
|
---|
| 2955 | /* Flush FIFO */
|
---|
| 2956 | __HAL_CRYP_FIFO_FLUSH(hcryp);
|
---|
| 2957 |
|
---|
| 2958 | /* Set the phase */
|
---|
| 2959 | hcryp->Phase = HAL_CRYP_PHASE_PROCESS;
|
---|
| 2960 | }
|
---|
| 2961 | /* Set the input and output addresses and start DMA transfer */
|
---|
| 2962 | CRYPEx_GCMCCM_SetDMAConfig(hcryp, inputaddr, Size, outputaddr);
|
---|
| 2963 |
|
---|
| 2964 | /* Unlock process */
|
---|
| 2965 | __HAL_UNLOCK(hcryp);
|
---|
| 2966 |
|
---|
| 2967 | /* Return function status */
|
---|
| 2968 | return HAL_OK;
|
---|
| 2969 | }
|
---|
| 2970 | else
|
---|
| 2971 | {
|
---|
| 2972 | return HAL_ERROR;
|
---|
| 2973 | }
|
---|
| 2974 | }
|
---|
| 2975 |
|
---|
| 2976 | /**
|
---|
| 2977 | * @}
|
---|
| 2978 | */
|
---|
| 2979 |
|
---|
| 2980 | /** @defgroup CRYPEx_Exported_Functions_Group2 CRYPEx IRQ handler management
|
---|
| 2981 | * @brief CRYPEx IRQ handler.
|
---|
| 2982 | *
|
---|
| 2983 | @verbatim
|
---|
| 2984 | ==============================================================================
|
---|
| 2985 | ##### CRYPEx IRQ handler management #####
|
---|
| 2986 | ==============================================================================
|
---|
| 2987 | [..] This section provides CRYPEx IRQ handler function.
|
---|
| 2988 |
|
---|
| 2989 | @endverbatim
|
---|
| 2990 | * @{
|
---|
| 2991 | */
|
---|
| 2992 |
|
---|
| 2993 | /**
|
---|
| 2994 | * @brief This function handles CRYPEx interrupt request.
|
---|
| 2995 | * @param hcryp: pointer to a CRYPEx_HandleTypeDef structure that contains
|
---|
| 2996 | * the configuration information for CRYP module
|
---|
| 2997 | * @retval None
|
---|
| 2998 | */
|
---|
| 2999 |
|
---|
| 3000 | void HAL_CRYPEx_GCMCCM_IRQHandler(CRYP_HandleTypeDef *hcryp)
|
---|
| 3001 | {
|
---|
| 3002 | switch(CRYP->CR & CRYP_CR_ALGOMODE_DIRECTION)
|
---|
| 3003 | {
|
---|
| 3004 | case CRYP_CR_ALGOMODE_AES_GCM_ENCRYPT:
|
---|
| 3005 | HAL_CRYPEx_AESGCM_Encrypt_IT(hcryp, NULL, 0, NULL);
|
---|
| 3006 | break;
|
---|
| 3007 |
|
---|
| 3008 | case CRYP_CR_ALGOMODE_AES_GCM_DECRYPT:
|
---|
| 3009 | HAL_CRYPEx_AESGCM_Decrypt_IT(hcryp, NULL, 0, NULL);
|
---|
| 3010 | break;
|
---|
| 3011 |
|
---|
| 3012 | case CRYP_CR_ALGOMODE_AES_CCM_ENCRYPT:
|
---|
| 3013 | HAL_CRYPEx_AESCCM_Encrypt_IT(hcryp, NULL, 0, NULL);
|
---|
| 3014 | break;
|
---|
| 3015 |
|
---|
| 3016 | case CRYP_CR_ALGOMODE_AES_CCM_DECRYPT:
|
---|
| 3017 | HAL_CRYPEx_AESCCM_Decrypt_IT(hcryp, NULL, 0, NULL);
|
---|
| 3018 | break;
|
---|
| 3019 |
|
---|
| 3020 | default:
|
---|
| 3021 | break;
|
---|
| 3022 | }
|
---|
| 3023 | }
|
---|
| 3024 |
|
---|
| 3025 | /**
|
---|
| 3026 | * @}
|
---|
| 3027 | */
|
---|
| 3028 |
|
---|
| 3029 | /**
|
---|
| 3030 | * @}
|
---|
| 3031 | */
|
---|
| 3032 | #endif /* STM32F437xx || STM32F439xx || STM32F479xx */
|
---|
| 3033 |
|
---|
| 3034 | #endif /* HAL_CRYP_MODULE_ENABLED */
|
---|
| 3035 | /**
|
---|
| 3036 | * @}
|
---|
| 3037 | */
|
---|
| 3038 |
|
---|
| 3039 | /**
|
---|
| 3040 | * @}
|
---|
| 3041 | */
|
---|
| 3042 |
|
---|
| 3043 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|
---|