/**
* @brief Decrypts Data using AES
* @note DATA transfer is done by DMA
* @note DMA2 stream6 channel2 is used to transfer data from memory (the
* EncryptedData Table) to CRYP Peripheral (the INPUT data register).
* @note DMA2 stream5 channel2 is used to transfer data from CRYP Peripheral
* (the OUTPUT data register to memory (the DecryptedData Table).
* @param None
* @retval None
*/
static void AES128_Decrypt_DMA(void)
{
CRYP_InitTypeDef CRYP_InitStructure;
CRYP_KeyInitTypeDef CRYP_KeyInitStructure;
DMA_InitTypeDef DMA_InitStructure;
/* Enable CRYP clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_CRYP, ENABLE);
/* Enable DMA2 clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
/* CRYP configuration********************************************************/
/* Crypto Init for Key preparation for Decryption process */
CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_AES_Key;
CRYP_InitStructure.CRYP_DataType = CRYP_DataType_32b;
CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_128b;
CRYP_Init(&CRYP_InitStructure);
/* Key Initialisation */
CRYP_KeyInitStructure.CRYP_Key2Left = AES128key[0];
CRYP_KeyInitStructure.CRYP_Key2Right= AES128key[1];
CRYP_KeyInitStructure.CRYP_Key3Left = AES128key[2];
CRYP_KeyInitStructure.CRYP_Key3Right= AES128key[3];
CRYP_KeyInit(&CRYP_KeyInitStructure);
/* Enable Crypto processor */
CRYP_Cmd(ENABLE);
/* wait until the Busy flag is reset */
while (CRYP_GetFlagStatus(CRYP_FLAG_BUSY) != RESET);
/* Crypto Init for Decryption process */
CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_AES_ECB;
CRYP_InitStructure.CRYP_DataType = CRYP_DataType_32b;
CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_128b;
CRYP_Init(&CRYP_InitStructure);
CRYP_Cmd(ENABLE);
CRYP_DMACmd(CRYP_DMAReq_DataIN, ENABLE);
CRYP_DMACmd(CRYP_DMAReq_DataOUT, ENABLE);
/* DMA Configuration*********************************************************/
DMA_DeInit(DMA2_Stream5);
DMA_DeInit(DMA2_Stream6);
/* Set common DMA parameters for Stream 5 and 6 */
DMA_InitStructure.DMA_Channel = DMA_Channel_2;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_BufferSize = DATA_SIZE;
/* Set the parameters to be configured for stream 6 */
DMA_InitStructure.DMA_PeripheralBaseAddr = CRYP_DIN_REG_ADDR;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)EncryptedData;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
/* Configure the DMA Stream 6 */
DMA_Init(DMA2_Stream6, &DMA_InitStructure);
/* Set the parameters to be configured for stream 5 */
DMA_InitStructure.DMA_PeripheralBaseAddr = CRYP_DOUT_REG_ADDR;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)DecryptedData;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
/* Configure the DMA Stream 5 */
DMA_Init(DMA2_Stream5, &DMA_InitStructure);
/* Enable DMA streams *******************************************************/
DMA_Cmd(DMA2_Stream6, ENABLE);
DMA_Cmd(DMA2_Stream5, ENABLE);
/* wait until the last transfer from OUT FIFO :
all encrypted Data are transferred from crypt processor */
while (DMA_GetFlagStatus(DMA2_Stream6, DMA_FLAG_TCIF5) == RESET);
/* Disable Crypto and DMA **************************************************/
CRYP_Cmd(DISABLE);
CRYP_DMACmd(CRYP_DMAReq_DataIN, DISABLE);
CRYP_DMACmd(CRYP_DMAReq_DataOUT, DISABLE);
DMA_Cmd(DMA2_Stream5, DISABLE);
DMA_Cmd(DMA2_Stream6, DISABLE);
DMA_ClearFlag(DMA2_Stream6, DMA_FLAG_TCIF5);
}
/**
* @brief Encrypt and decrypt using TDES in ECB Mode
* @param Mode: encryption or decryption Mode.
* This parameter can be one of the following values:
* @arg MODE_ENCRYPT: Encryption
* @arg MODE_DECRYPT: Decryption
* @param Key: Key used for TDES algorithm.
* @param Ilength: length of the Input buffer, must be a multiple of 8.
* @param Input: pointer to the Input buffer.
* @param Output: pointer to the returned buffer.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: Operation done
* - ERROR: Operation failed
*/
ErrorStatus CRYP_TDES_ECB(uint8_t Mode, uint8_t Key[24], uint8_t *Input,
uint32_t Ilength, uint8_t *Output)
{
CRYP_InitTypeDef TDES_CRYP_InitStructure;
CRYP_KeyInitTypeDef TDES_CRYP_KeyInitStructure;
__IO uint32_t counter = 0;
uint32_t busystatus = 0;
ErrorStatus status = SUCCESS;
uint32_t keyaddr = (uint32_t)Key;
uint32_t inputaddr = (uint32_t)Input;
uint32_t outputaddr = (uint32_t)Output;
uint32_t i = 0;
/* Crypto structures initialisation*/
CRYP_KeyStructInit(&TDES_CRYP_KeyInitStructure);
/* Crypto Init for Encryption process */
if(Mode == MODE_ENCRYPT) /* TDES encryption */
{
TDES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
}
else /*if(Mode == MODE_DECRYPT)*/ /* TDES decryption */
{
TDES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
}
TDES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_TDES_ECB;
TDES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_8b;
CRYP_Init(&TDES_CRYP_InitStructure);
/* Key Initialisation */
TDES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
TDES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
TDES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
TDES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
TDES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
TDES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr));
CRYP_KeyInit(& TDES_CRYP_KeyInitStructure);
/* Flush IN/OUT FIFO */
CRYP_FIFOFlush();
/* Enable Crypto processor */
CRYP_Cmd(ENABLE);
for(i=0; ((i<Ilength) && (status != ERROR)); i+=8)
{
/* Write the Input block in the Input FIFO */
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
/* Wait until the complete message has been processed */
counter = 0;
do
{
busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY);
counter++;
}while ((counter != TDESBUSY_TIMEOUT) && (busystatus != RESET));
if (busystatus != RESET)
{
status = ERROR;
}
else
{
/* Read the Output block from the Output FIFO */
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
}
}
/* Disable Crypto */
CRYP_Cmd(DISABLE);
return status;
}
/**
* @brief Encrypt and decrypt using DES in CBC Mode
* @param Mode: encryption or decryption Mode.
* This parameter can be one of the following values:
* @arg MODE_ENCRYPT: Encryption
* @arg MODE_DECRYPT: Decryption
* @param Key: Key used for DES algorithm.
* @param InitVectors: Initialisation Vectors used for DES algorithm.
* @param Ilength: length of the Input buffer, must be a multiple of 8.
* @param Input: pointer to the Input buffer.
* @param Output: pointer to the returned buffer.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: Operation done
* - ERROR: Operation failed
*/
ErrorStatus CRYP_DES_CBC(uint8_t Mode, uint8_t Key[8], uint8_t InitVectors[8],
uint8_t *Input, uint32_t Ilength, uint8_t *Output)
{
CRYP_InitTypeDef DES_CRYP_InitStructure;
CRYP_KeyInitTypeDef DES_CRYP_KeyInitStructure;
CRYP_IVInitTypeDef DES_CRYP_IVInitStructure;
__IO uint32_t counter = 0;
uint32_t busystatus = 0;
ErrorStatus status = SUCCESS;
uint32_t keyaddr = (uint32_t)Key;
uint32_t inputaddr = (uint32_t)Input;
uint32_t outputaddr = (uint32_t)Output;
uint32_t ivaddr = (uint32_t)InitVectors;
uint32_t i = 0;
/* Crypto structures initialisation*/
CRYP_KeyStructInit(&DES_CRYP_KeyInitStructure);
/* Crypto Init for Encryption process */
if(Mode == MODE_ENCRYPT) /* DES encryption */
{
DES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
}
else /*if(Mode == MODE_DECRYPT)*/ /* DES decryption */
{
DES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
}
DES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_DES_CBC;
DES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_8b;
CRYP_Init(&DES_CRYP_InitStructure);
/* Key Initialisation */
DES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
DES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr));
CRYP_KeyInit(& DES_CRYP_KeyInitStructure);
/* Initialization Vectors */
DES_CRYP_IVInitStructure.CRYP_IV0Left = __REV(*(uint32_t*)(ivaddr));
ivaddr+=4;
DES_CRYP_IVInitStructure.CRYP_IV0Right= __REV(*(uint32_t*)(ivaddr));
CRYP_IVInit(&DES_CRYP_IVInitStructure);
/* Flush IN/OUT FIFO */
CRYP_FIFOFlush();
/* Enable Crypto processor */
CRYP_Cmd(ENABLE);
if(CRYP_GetCmdStatus() == DISABLE)
{
/* The CRYP peripheral clock is not enabled or the device doesn't embedd
the CRYP peripheral (please check the device sales type. */
return(ERROR);
}
for(i=0; ((i<Ilength) && (status != ERROR)); i+=8)
{
/* Write the Input block in the Input FIFO */
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
/* Wait until the complete message has been processed */
counter = 0;
do
{
busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY);
counter++;
}while ((counter != DESBUSY_TIMEOUT) && (busystatus != RESET));
if (busystatus != RESET)
{
status = ERROR;
}
else
{
/* Read the Output block from the Output FIFO */
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
}
}
/* Disable Crypto */
CRYP_Cmd(DISABLE);
return status;
}
/**
* @brief Encrypt and decrypt using AES in ECB Mode
* @param Mode: encryption or decryption Mode.
* This parameter can be one of the following values:
* @arg MODE_ENCRYPT: Encryption
* @arg MODE_DECRYPT: Decryption
* @param Key: Key used for AES algorithm.
* @param Keysize: length of the Key, must be a 128, 192 or 256.
* @param Input: pointer to the Input buffer.
* @param Ilength: length of the Input buffer, must be a multiple of 16.
* @param Output: pointer to the returned buffer.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: Operation done
* - ERROR : Operation failed
*/
ErrorStatus CRYP_AES_ECB(uint8_t Mode, uint8_t* Key, uint16_t Keysize,
uint8_t* Input, uint32_t Ilength, uint8_t* Output)
{
CRYP_InitTypeDef AES_CRYP_InitStructure;
CRYP_KeyInitTypeDef AES_CRYP_KeyInitStructure;
__IO uint32_t counter = 0;
uint32_t busystatus = 0;
ErrorStatus status = SUCCESS;
uint32_t keyaddr = (uint32_t)Key;
uint32_t inputaddr = (uint32_t)Input;
uint32_t outputaddr = (uint32_t)Output;
uint32_t i = 0;
/* Crypto structures initialisation*/
CRYP_KeyStructInit(&AES_CRYP_KeyInitStructure);
switch(Keysize)
{
case 128:
AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_128b;
AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr));
break;
case 192:
AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_192b;
AES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr));
break;
case 256:
AES_CRYP_InitStructure.CRYP_KeySize = CRYP_KeySize_256b;
AES_CRYP_KeyInitStructure.CRYP_Key0Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key0Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key1Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key1Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key2Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key2Right= __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key3Left = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4;
AES_CRYP_KeyInitStructure.CRYP_Key3Right= __REV(*(uint32_t*)(keyaddr));
break;
default:
break;
}
/*------------------ AES Decryption ------------------*/
if(Mode == MODE_DECRYPT) /* AES decryption */
{
/* Flush IN/OUT FIFOs */
CRYP_FIFOFlush();
/* Crypto Init for Key preparation for decryption process */
AES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
AES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_AES_Key;
AES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_32b;
CRYP_Init(&AES_CRYP_InitStructure);
/* Key Initialisation */
CRYP_KeyInit(&AES_CRYP_KeyInitStructure);
/* Enable Crypto processor */
CRYP_Cmd(ENABLE);
/* wait until the Busy flag is RESET */
do
{
busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY);
counter++;
}while ((counter != AESBUSY_TIMEOUT) && (busystatus != RESET));
if (busystatus != RESET)
{
status = ERROR;
}
else
{
/* Crypto Init for decryption process */
AES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
}
}
/*------------------ AES Encryption ------------------*/
else /* AES encryption */
{
CRYP_KeyInit(&AES_CRYP_KeyInitStructure);
/* Crypto Init for Encryption process */
AES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
}
AES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_AES_ECB;
AES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_8b;
CRYP_Init(&AES_CRYP_InitStructure);
/* Flush IN/OUT FIFOs */
CRYP_FIFOFlush();
/* Enable Crypto processor */
CRYP_Cmd(ENABLE);
for(i=0; ((i<Ilength) && (status != ERROR)); i+=16)
{
/* Write the Input block in the IN FIFO */
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
CRYP_DataIn(*(uint32_t*)(inputaddr));
inputaddr+=4;
/* Wait until the complete message has been processed */
counter = 0;
do
{
busystatus = CRYP_GetFlagStatus(CRYP_FLAG_BUSY);
counter++;
}while ((counter != AESBUSY_TIMEOUT) && (busystatus != RESET));
if (busystatus != RESET)
{
status = ERROR;
}
else
{
/* Read the Output block from the Output FIFO */
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
*(uint32_t*)(outputaddr) = CRYP_DataOut();
outputaddr+=4;
}
}
/* Disable Crypto */
CRYP_Cmd(DISABLE);
return status;
}
void DesCrypt(Des* des, byte* out, const byte* in, word32 sz,
int dir, int mode)
{
word32 *dkey, *iv;
CRYP_InitTypeDef DES_CRYP_InitStructure;
CRYP_KeyInitTypeDef DES_CRYP_KeyInitStructure;
CRYP_IVInitTypeDef DES_CRYP_IVInitStructure;
dkey = des->key;
iv = des->reg;
/* crypto structure initialization */
CRYP_KeyStructInit(&DES_CRYP_KeyInitStructure);
CRYP_StructInit(&DES_CRYP_InitStructure);
CRYP_IVStructInit(&DES_CRYP_IVInitStructure);
/* reset registers to their default values */
CRYP_DeInit();
/* set direction, mode, and datatype */
if (dir == DES_ENCRYPTION) {
DES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
} else { /* DES_DECRYPTION */
DES_CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Decrypt;
}
if (mode == DES_CBC) {
DES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_DES_CBC;
} else { /* DES_ECB */
DES_CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_DES_ECB;
}
DES_CRYP_InitStructure.CRYP_DataType = CRYP_DataType_8b;
CRYP_Init(&DES_CRYP_InitStructure);
/* load key into correct registers */
DES_CRYP_KeyInitStructure.CRYP_Key1Left = dkey[0];
DES_CRYP_KeyInitStructure.CRYP_Key1Right = dkey[1];
CRYP_KeyInit(&DES_CRYP_KeyInitStructure);
/* set iv */
ByteReverseWords(iv, iv, DES_BLOCK_SIZE);
DES_CRYP_IVInitStructure.CRYP_IV0Left = iv[0];
DES_CRYP_IVInitStructure.CRYP_IV0Right = iv[1];
CRYP_IVInit(&DES_CRYP_IVInitStructure);
/* enable crypto processor */
CRYP_Cmd(ENABLE);
while (sz > 0)
{
/* flush IN/OUT FIFOs */
CRYP_FIFOFlush();
/* if input and output same will overwrite input iv */
XMEMCPY(des->tmp, in + sz - DES_BLOCK_SIZE, DES_BLOCK_SIZE);
CRYP_DataIn(*(uint32_t*)&in[0]);
CRYP_DataIn(*(uint32_t*)&in[4]);
/* wait until the complete message has been processed */
while(CRYP_GetFlagStatus(CRYP_FLAG_BUSY) != RESET) {}
*(uint32_t*)&out[0] = CRYP_DataOut();
*(uint32_t*)&out[4] = CRYP_DataOut();
/* store iv for next call */
XMEMCPY(des->reg, des->tmp, DES_BLOCK_SIZE);
sz -= DES_BLOCK_SIZE;
in += DES_BLOCK_SIZE;
out += DES_BLOCK_SIZE;
}
/* disable crypto processor */
CRYP_Cmd(DISABLE);
}
/**
* @brief Encrypt Data using TDES
* @note DATA transfer is done by DMA
* @note DMA2 stream6 channel2 is used to transfer data from memory (the
* PlainData Tab) to CRYP Peripheral (the INPUT data register).
* @note DMA2 stream5 channel2 is used to transfer data from CRYP Peripheral
* (the OUTPUT data register to memory (the EncryptedData Tab).
* @param None
* @retval None
*/
void TDES_Encrypt_DMA(void)
{
CRYP_InitTypeDef CRYP_InitStructure;
CRYP_KeyInitTypeDef CRYP_KeyInitStructure;
DMA_InitTypeDef DMA_InitStructure;
/* Enable CRYP clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_CRYP, ENABLE);
/* Enable DMA2 clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
/* Configure crypto as encoder TDES *****************************************/
/* Crypto Init for Encryption process */
CRYP_InitStructure.CRYP_AlgoDir = CRYP_AlgoDir_Encrypt;
CRYP_InitStructure.CRYP_AlgoMode = CRYP_AlgoMode_TDES_ECB;
CRYP_InitStructure.CRYP_DataType = CRYP_DataType_32b;
CRYP_FIFOFlush();
CRYP_Init(&CRYP_InitStructure);
/* Key Initialisation */
CRYP_KeyInitStructure.CRYP_Key1Left = TDESkey[0];
CRYP_KeyInitStructure.CRYP_Key1Right= TDESkey[1];
CRYP_KeyInitStructure.CRYP_Key2Left = TDESkey[2];
CRYP_KeyInitStructure.CRYP_Key2Right= TDESkey[3];
CRYP_KeyInitStructure.CRYP_Key3Left = TDESkey[4];
CRYP_KeyInitStructure.CRYP_Key3Right= TDESkey[5];
CRYP_KeyInit(&CRYP_KeyInitStructure);
CRYP_DMACmd(CRYP_DMAReq_DataOUT, ENABLE);
CRYP_DMACmd(CRYP_DMAReq_DataIN, ENABLE);
/* DMA Configuration*********************************************************/
/* set commun DMA parameters for Stream 5 and 6*/
DMA_DeInit(DMA2_Stream5);
DMA_DeInit(DMA2_Stream6);
DMA_InitStructure.DMA_Channel = DMA_Channel_2;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_BufferSize = DATA_SIZE;
/* Set the parameters to be configured specific to stream 6*/
DMA_InitStructure.DMA_PeripheralBaseAddr = CRYP_DIN_REG_ADDR;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)PlainData;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
/* Configure the DMA Stream 6 */
DMA_Init(DMA2_Stream6, &DMA_InitStructure);
/* Set the parameters to be configured specific to stream 5*/
DMA_InitStructure.DMA_PeripheralBaseAddr = CRYP_DOUT_REG_ADDR;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)EncryptedData;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
/* Configure the DMA Stream 5 */
DMA_Init(DMA2_Stream5, &DMA_InitStructure);
/* Enable DMA streams*/
DMA_Cmd(DMA2_Stream6, ENABLE);
DMA_Cmd(DMA2_Stream5, ENABLE);
/* Enable Crypto processor */
CRYP_Cmd(ENABLE);
/* wait until the last transfer from OUT FIFO :
all encrypted Data are transfered from crypt processor */
while (DMA_GetFlagStatus(DMA2_Stream5, DMA_FLAG_TCIF5) == RESET);
/* Disable Crypto and DMA ***************************************************/
CRYP_Cmd(DISABLE);
CRYP_DMACmd(CRYP_DMAReq_DataOUT, DISABLE);
CRYP_DMACmd(CRYP_DMAReq_DataIN, DISABLE);
DMA_Cmd(DMA2_Stream5, DISABLE);
DMA_Cmd(DMA2_Stream6, DISABLE);
}