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Mysteo91
2023-06-30 13:08:42 +03:00
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Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cryp_ex.c Normal file
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/**
******************************************************************************
* @file stm32g0xx_hal_cryp_ex.c
* @author MCD Application Team
* @brief CRYPEx HAL module driver.
* This file provides firmware functions to manage the extended
* functionalities of the Cryptography (CRYP) peripheral.
*
******************************************************************************
* @attention
*
* Copyright (c) 2018 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32g0xx_hal.h"
/** @addtogroup STM32G0xx_HAL_Driver
* @{
*/
/** @addtogroup CRYPEx
* @{
*/
#if defined(AES)
#ifdef HAL_CRYP_MODULE_ENABLED
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @addtogroup CRYPEx_Private_Defines
* @{
*/
#define CRYP_PHASE_INIT 0x00000000U /*!< GCM/GMAC (or CCM) init phase */
#define CRYP_PHASE_HEADER AES_CR_GCMPH_0 /*!< GCM/GMAC or CCM header phase */
#define CRYP_PHASE_PAYLOAD AES_CR_GCMPH_1 /*!< GCM(/CCM) payload phase */
#define CRYP_PHASE_FINAL AES_CR_GCMPH /*!< GCM/GMAC or CCM final phase */
#define CRYP_OPERATINGMODE_ENCRYPT 0x00000000U /*!< Encryption mode */
#define CRYP_OPERATINGMODE_KEYDERIVATION AES_CR_MODE_0 /*!< Key derivation mode only used when performing ECB and CBC decryptions */
#define CRYP_OPERATINGMODE_DECRYPT AES_CR_MODE_1 /*!< Decryption */
#define CRYP_OPERATINGMODE_KEYDERIVATION_DECRYPT AES_CR_MODE /*!< Key derivation and decryption only used when performing ECB and CBC decryptions */
#define CRYPEx_PHASE_PROCESS 0x02U /*!< CRYP peripheral is in processing phase */
#define CRYPEx_PHASE_FINAL 0x03U /*!< CRYP peripheral is in final phase this is relevant only with CCM and GCM modes */
/* CTR0 information to use in CCM algorithm */
#define CRYP_CCM_CTR0_0 0x07FFFFFFU
#define CRYP_CCM_CTR0_3 0xFFFFFF00U
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions---------------------------------------------------------*/
/** @addtogroup CRYPEx_Exported_Functions
* @{
*/
/** @defgroup CRYPEx_Exported_Functions_Group1 Extended AES processing functions
* @brief Extended processing functions.
*
@verbatim
==============================================================================
##### Extended AES processing functions #####
==============================================================================
[..] This section provides functions allowing to generate the authentication
TAG in Polling mode
(#)HAL_CRYPEx_AESGCM_GenerateAuthTAG
(#)HAL_CRYPEx_AESCCM_GenerateAuthTAG
they should be used after Encrypt/Decrypt operation.
@endverbatim
* @{
*/
/**
* @brief generate the GCM authentication TAG.
* @param hcryp pointer to a CRYP_HandleTypeDef structure that contains
* the configuration information for CRYP module
* @param AuthTag Pointer to the authentication buffer
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CRYPEx_AESGCM_GenerateAuthTAG(CRYP_HandleTypeDef *hcryp, uint32_t *AuthTag, uint32_t Timeout)
{
uint32_t tickstart;
/* Assume first Init.HeaderSize is in words */
uint64_t headerlength = (uint64_t)hcryp->Init.HeaderSize * 32U; /* Header length in bits */
uint64_t inputlength = (uint64_t)hcryp->SizesSum * 8U; /* Input length in bits */
uint32_t tagaddr = (uint32_t)AuthTag;
/* Correct headerlength if Init.HeaderSize is actually in bytes */
if (hcryp->Init.HeaderWidthUnit == CRYP_HEADERWIDTHUNIT_BYTE)
{
headerlength /= 4U;
}
if (hcryp->State == HAL_CRYP_STATE_READY)
{
/* Process locked */
__HAL_LOCK(hcryp);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_BUSY;
/* Check if initialization phase has already been performed */
if (hcryp->Phase == CRYPEx_PHASE_PROCESS)
{
/* Change the CRYP phase */
hcryp->Phase = CRYPEx_PHASE_FINAL;
}
else /* Initialization phase has not been performed*/
{
/* Disable the Peripheral */
__HAL_CRYP_DISABLE(hcryp);
/* Sequence error code field */
hcryp->ErrorCode |= HAL_CRYP_ERROR_AUTH_TAG_SEQUENCE;
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
/* Select final phase */
MODIFY_REG(hcryp->Instance->CR, AES_CR_GCMPH, CRYP_PHASE_FINAL);
/* Set the encrypt operating mode*/
MODIFY_REG(hcryp->Instance->CR, AES_CR_MODE, CRYP_OPERATINGMODE_ENCRYPT);
/*TinyAES peripheral from V3.1.1 : data has to be inserted normally (no swapping)*/
/* Write into the AES_DINR register the number of bits in header (64 bits)
followed by the number of bits in the payload */
hcryp->Instance->DINR = 0U;
hcryp->Instance->DINR = (uint32_t)(headerlength);
hcryp->Instance->DINR = 0U;
hcryp->Instance->DINR = (uint32_t)(inputlength);
/* Wait for CCF flag to be raised */
tickstart = HAL_GetTick();
while (HAL_IS_BIT_CLR(hcryp->Instance->SR, AES_SR_CCF))
{
/* Check for the Timeout */
if (Timeout != HAL_MAX_DELAY)
{
if (((HAL_GetTick() - tickstart) > Timeout)||(Timeout == 0U))
{
/* Disable the CRYP peripheral clock */
__HAL_CRYP_DISABLE(hcryp);
/* Change state */
hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
}
}
/* Read the authentication TAG in the output FIFO */
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
/* Clear CCF flag */
__HAL_CRYP_CLEAR_FLAG(hcryp, CRYP_CCF_CLEAR);
/* Disable the peripheral */
__HAL_CRYP_DISABLE(hcryp);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
}
else
{
/* Busy error code field */
hcryp->ErrorCode |= HAL_CRYP_ERROR_BUSY;
return HAL_ERROR;
}
/* Return function status */
return HAL_OK;
}
/**
* @brief AES CCM Authentication TAG generation.
* @param hcryp pointer to a CRYP_HandleTypeDef structure that contains
* the configuration information for CRYP module
* @param AuthTag Pointer to the authentication buffer
* @param Timeout Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CRYPEx_AESCCM_GenerateAuthTAG(CRYP_HandleTypeDef *hcryp, uint32_t *AuthTag, uint32_t Timeout)
{
uint32_t tagaddr = (uint32_t)AuthTag;
uint32_t tickstart;
if (hcryp->State == HAL_CRYP_STATE_READY)
{
/* Process locked */
__HAL_LOCK(hcryp);
/* Disable interrupts in case they were kept enabled to proceed
a single message in several iterations */
__HAL_CRYP_DISABLE_IT(hcryp, CRYP_IT_CCFIE | CRYP_IT_ERRIE);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_BUSY;
/* Check if initialization phase has already been performed */
if (hcryp->Phase == CRYPEx_PHASE_PROCESS)
{
/* Change the CRYP phase */
hcryp->Phase = CRYPEx_PHASE_FINAL;
}
else /* Initialization phase has not been performed*/
{
/* Disable the peripheral */
__HAL_CRYP_DISABLE(hcryp);
/* Sequence error code field */
hcryp->ErrorCode |= HAL_CRYP_ERROR_AUTH_TAG_SEQUENCE;
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
/* Select final phase */
MODIFY_REG(hcryp->Instance->CR, AES_CR_GCMPH, CRYP_PHASE_FINAL);
/* Set encrypt operating mode*/
MODIFY_REG(hcryp->Instance->CR, AES_CR_MODE, CRYP_OPERATINGMODE_ENCRYPT);
/* Wait for CCF flag to be raised */
tickstart = HAL_GetTick();
while (HAL_IS_BIT_CLR(hcryp->Instance->SR, AES_SR_CCF))
{
/* Check for the Timeout */
if (Timeout != HAL_MAX_DELAY)
{
if (((HAL_GetTick() - tickstart) > Timeout) ||(Timeout == 0U))
{
/* Disable the CRYP peripheral Clock */
__HAL_CRYP_DISABLE(hcryp);
/* Change state */
hcryp->ErrorCode |= HAL_CRYP_ERROR_TIMEOUT;
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
return HAL_ERROR;
}
}
}
/* Read the authentication TAG in the output FIFO */
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
tagaddr += 4U;
*(uint32_t *)(tagaddr) = hcryp->Instance->DOUTR;
/* Clear CCF Flag */
__HAL_CRYP_CLEAR_FLAG(hcryp, CRYP_CCF_CLEAR);
/* Change the CRYP peripheral state */
hcryp->State = HAL_CRYP_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcryp);
/* Disable CRYP */
__HAL_CRYP_DISABLE(hcryp);
}
else
{
/* Busy error code field */
hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY;
return HAL_ERROR;
}
/* Return function status */
return HAL_OK;
}
/**
* @}
*/
/** @defgroup CRYPEx_Exported_Functions_Group2 Extended AES Key Derivations functions
* @brief Extended Key Derivations functions.
*
@verbatim
==============================================================================
##### Key Derivation functions #####
==============================================================================
[..] This section provides functions allowing to Enable or Disable the
the AutoKeyDerivation parameter in CRYP_HandleTypeDef structure
These function are allowed only in TinyAES peripheral.
@endverbatim
* @{
*/
/**
* @brief AES enable key derivation functions
* @param hcryp pointer to a CRYP_HandleTypeDef structure.
*/
void HAL_CRYPEx_EnableAutoKeyDerivation(CRYP_HandleTypeDef *hcryp)
{
if (hcryp->State == HAL_CRYP_STATE_READY)
{
hcryp->AutoKeyDerivation = ENABLE;
}
else
{
/* Busy error code field */
hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY;
}
}
/**
* @brief AES disable key derivation functions
* @param hcryp pointer to a CRYP_HandleTypeDef structure.
*/
void HAL_CRYPEx_DisableAutoKeyDerivation(CRYP_HandleTypeDef *hcryp)
{
if (hcryp->State == HAL_CRYP_STATE_READY)
{
hcryp->AutoKeyDerivation = DISABLE;
}
else
{
/* Busy error code field */
hcryp->ErrorCode = HAL_CRYP_ERROR_BUSY;
}
}
/**
* @}
*/
/**
* @}
*/
#endif /* HAL_CRYP_MODULE_ENABLED */
#endif /* AES */
/**
* @}
*/
/**
* @}
*/