amiro-blt / Target / Demo / ARMCM4_STM32F405_Power_Management_GCC / Boot / lib / stdperiphlib / STM32F4xx_StdPeriph_Driver / src / stm32f4xx_cryp_aes.c @ 69661903
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/**
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******************************************************************************
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* @file stm32f4xx_cryp_aes.c
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* @author MCD Application Team
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* @version V1.1.0
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* @date 11-January-2013
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* @brief This file provides high level functions to encrypt and decrypt an
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* input message using AES in ECB/CBC/CTR/GCM/CCM modes.
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* It uses the stm32f4xx_cryp.c/.h drivers to access the STM32F4xx CRYP
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* peripheral.
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* AES-ECB/CBC/CTR/GCM/CCM modes are available on STM32F437x Devices.
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* For STM32F41xx Devices, only AES-ECB/CBC/CTR modes are available.
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*
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@verbatim
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===================================================================
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##### How to use this driver #####
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===================================================================
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[..]
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(#) Enable The CRYP controller clock using
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RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_CRYP, ENABLE); function.
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(#) Encrypt and decrypt using AES in ECB Mode using CRYP_AES_ECB() function.
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(#) Encrypt and decrypt using AES in CBC Mode using CRYP_AES_CBC() function.
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(#) Encrypt and decrypt using AES in CTR Mode using CRYP_AES_CTR() function.
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(#) Encrypt and decrypt using AES in GCM Mode using CRYP_AES_GCM() function.
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(#) Encrypt and decrypt using AES in CCM Mode using CRYP_AES_CCM() function.
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@endverbatim
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_cryp.h" |
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/** @addtogroup STM32F4xx_StdPeriph_Driver
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* @{
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*/
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/** @defgroup CRYP
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* @brief CRYP driver modules
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define AESBUSY_TIMEOUT ((uint32_t) 0x00010000) |
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup CRYP_Private_Functions
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* @{
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*/
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/** @defgroup CRYP_Group6 High Level AES functions
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* @brief High Level AES functions
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*
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@verbatim
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===============================================================================
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##### High Level AES functions #####
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Encrypt and decrypt using AES in ECB Mode
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* @param Mode: encryption or decryption Mode.
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* This parameter can be one of the following values:
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* @arg MODE_ENCRYPT: Encryption
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* @arg MODE_DECRYPT: Decryption
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* @param Key: Key used for AES algorithm.
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* @param Keysize: length of the Key, must be a 128, 192 or 256.
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* @param Input: pointer to the Input buffer.
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* @param Ilength: length of the Input buffer, must be a multiple of 16.
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* @param Output: pointer to the returned buffer.
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: Operation done
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* - ERROR: Operation failed
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*/
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ErrorStatus CRYP_AES_ECB(uint8_t Mode, uint8_t* Key, uint16_t Keysize, |
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uint8_t* Input, uint32_t Ilength, uint8_t* Output) |
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{
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CRYP_InitTypeDef AES_CRYP_InitStructure; |
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CRYP_KeyInitTypeDef AES_CRYP_KeyInitStructure; |
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__IO uint32_t counter = 0;
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uint32_t busystatus = 0;
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ErrorStatus status = SUCCESS; |
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uint32_t keyaddr = (uint32_t)Key; |
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uint32_t inputaddr = (uint32_t)Input; |
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uint32_t outputaddr = (uint32_t)Output; |
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uint32_t i = 0;
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/* Crypto structures initialisation*/
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CRYP_KeyStructInit(&AES_CRYP_KeyInitStructure); |
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switch(Keysize)
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{
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case 128: |
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AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_128b; |
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AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr)); |
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break;
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case 192: |
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AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_192b; |
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AES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr)); |
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break;
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case 256: |
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AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_256b; |
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AES_CRYP_KeyInitStructure.CRYP_Key0Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key0Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr)); |
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break;
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default:
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break;
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} |
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/*------------------ AES Decryption ------------------*/
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if(Mode == MODE_DECRYPT) /* AES decryption */ |
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{
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/* Flush IN/OUT FIFOs */
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CRYP_FIFOFlush(); |
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/* Crypto Init for Key preparation for decryption process */
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AES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt; |
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AES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_AES_Key; |
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AES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_32b; |
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CRYP_Init(&AES_CRYP_InitStructure); |
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/* Key Initialisation */
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CRYP_KeyInit(&AES_CRYP_KeyInitStructure); |
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/* Enable Crypto processor */
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CRYP_Cmd(ENABLE); |
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/* wait until the Busy flag is RESET */
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do
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{
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busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY); |
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counter++; |
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}while ((counter != AESBUSY_TIMEOUT) && (busystatus != RESET));
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if (busystatus != RESET)
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{
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status = ERROR; |
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} |
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else
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{
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/* Crypto Init for decryption process */
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AES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt; |
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} |
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} |
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/*------------------ AES Encryption ------------------*/
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else /* AES encryption */ |
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{
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CRYP_KeyInit(&AES_CRYP_KeyInitStructure); |
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/* Crypto Init for Encryption process */
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AES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt; |
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} |
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AES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_AES_ECB; |
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AES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_8b; |
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CRYP_Init(&AES_CRYP_InitStructure); |
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/* Flush IN/OUT FIFOs */
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CRYP_FIFOFlush(); |
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/* Enable Crypto processor */
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CRYP_Cmd(ENABLE); |
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if(CRYP_GetCmdStatus() == DISABLE)
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{
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/* The CRYP peripheral clock is not enabled or the device doesn't embedd
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the CRYP peripheral (please check the device sales type. */
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return(ERROR);
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} |
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for(i=0; ((i<Ilength) && (status != ERROR)); i+=16) |
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{
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/* Write the Input block in the IN FIFO */
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CRYP_DataIn(*(uint32_t*)(inputaddr)); |
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inputaddr+=4;
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CRYP_DataIn(*(uint32_t*)(inputaddr)); |
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inputaddr+=4;
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CRYP_DataIn(*(uint32_t*)(inputaddr)); |
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inputaddr+=4;
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CRYP_DataIn(*(uint32_t*)(inputaddr)); |
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inputaddr+=4;
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/* Wait until the complete message has been processed */
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counter = 0;
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do
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{
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busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY); |
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counter++; |
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}while ((counter != AESBUSY_TIMEOUT) && (busystatus != RESET));
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if (busystatus != RESET)
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{
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status = ERROR; |
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} |
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else
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{
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/* Read the Output block from the Output FIFO */
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*(uint32_t*)(outputaddr) = CRYP_DataOut(); |
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = CRYP_DataOut(); |
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = CRYP_DataOut(); |
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outputaddr+=4;
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*(uint32_t*)(outputaddr) = CRYP_DataOut(); |
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outputaddr+=4;
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} |
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} |
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/* Disable Crypto */
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CRYP_Cmd(DISABLE); |
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return status;
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} |
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/**
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* @brief Encrypt and decrypt using AES in CBC Mode
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* @param Mode: encryption or decryption Mode.
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* This parameter can be one of the following values:
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* @arg MODE_ENCRYPT: Encryption
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* @arg MODE_DECRYPT: Decryption
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* @param InitVectors: Initialisation Vectors used for AES algorithm.
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* @param Key: Key used for AES algorithm.
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* @param Keysize: length of the Key, must be a 128, 192 or 256.
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* @param Input: pointer to the Input buffer.
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* @param Ilength: length of the Input buffer, must be a multiple of 16.
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* @param Output: pointer to the returned buffer.
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: Operation done
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* - ERROR: Operation failed
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*/
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ErrorStatus CRYP_AES_CBC(uint8_t Mode, uint8_t InitVectors[16], uint8_t *Key,
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uint16_t Keysize, uint8_t *Input, uint32_t Ilength, |
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uint8_t *Output) |
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{
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CRYP_InitTypeDef AES_CRYP_InitStructure; |
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CRYP_KeyInitTypeDef AES_CRYP_KeyInitStructure; |
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CRYP_IVInitTypeDef AES_CRYP_IVInitStructure; |
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__IO uint32_t counter = 0;
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uint32_t busystatus = 0;
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ErrorStatus status = SUCCESS; |
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uint32_t keyaddr = (uint32_t)Key; |
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uint32_t inputaddr = (uint32_t)Input; |
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uint32_t outputaddr = (uint32_t)Output; |
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uint32_t ivaddr = (uint32_t)InitVectors; |
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uint32_t i = 0;
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/* Crypto structures initialisation*/
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CRYP_KeyStructInit(&AES_CRYP_KeyInitStructure); |
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switch(Keysize)
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{
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case 128: |
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AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_128b; |
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AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr)); |
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break;
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case 192: |
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AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_192b; |
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AES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr)); |
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break;
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case 256: |
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AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_256b; |
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AES_CRYP_KeyInitStructure.CRYP_Key0Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key0Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr)); |
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keyaddr+=4;
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AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr)); |
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break;
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default:
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break;
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} |
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/* CRYP Initialization Vectors */
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AES_CRYP_IVInitStructure.CRYP_IV0Left = __REV(*(uint32_t*)(ivaddr)); |
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ivaddr+=4;
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AES_CRYP_IVInitStructure.CRYP_IV0Right= __REV(*(uint32_t*)(ivaddr)); |
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ivaddr+=4;
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AES_CRYP_IVInitStructure.CRYP_IV1Left = __REV(*(uint32_t*)(ivaddr)); |
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ivaddr+=4;
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AES_CRYP_IVInitStructure.CRYP_IV1Right= __REV(*(uint32_t*)(ivaddr) |