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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "fsl_ltc_edma.h"
/*******************************************************************************
* Definitions
******************************************************************************/
/*<! Structure definition for ltc_edma_private_handle_t. The structure is private. */
typedef struct _ltc_edma_private_handle
{
LTC_Type *base;
ltc_edma_handle_t *handle;
} ltc_edma_private_handle_t;
/*******************************************************************************
* Variables
******************************************************************************/
/*<! Private handle only used for internally. */
static ltc_edma_private_handle_t s_edmaPrivateHandle[FSL_FEATURE_SOC_LTC_COUNT];
/* Array of LTC peripheral base address. */
static LTC_Type *const s_ltcBase[] = LTC_BASE_PTRS;
/*******************************************************************************
* Definitions
******************************************************************************/
/* State machine state.*/
#define LTC_SM_STATE_START 0x0000u
#define LTC_SM_STATE_FINISH 0xFFFFu
/*! Full word representing the actual bit values for the LTC mode register. */
typedef uint32_t ltc_mode_t;
#define LTC_FIFO_SZ_MAX_DOWN_ALGN (0xff0u)
#define LTC_MD_ALG_AES (0x10U) /*!< Bit field value for LTC_MD_ALG: AES */
#define LTC_MD_ALG_DES (0x20U) /*!< Bit field value for LTC_MD_ALG: DES */
#define LTC_MD_ALG_TRIPLE_DES (0x21U) /*!< Bit field value for LTC_MD_ALG: 3DES */
#define LTC_MDPK_ALG_PKHA (0x80U) /*!< Bit field value for LTC_MDPK_ALG: PKHA */
#define LTC_MD_ENC_DECRYPT (0U) /*!< Bit field value for LTC_MD_ENC: Decrypt. */
#define LTC_MD_ENC_ENCRYPT (0x1U) /*!< Bit field value for LTC_MD_ENC: Encrypt. */
#define LTC_MD_AS_UPDATE (0U) /*!< Bit field value for LTC_MD_AS: Update */
#define LTC_MD_AS_INITIALIZE (0x1U) /*!< Bit field value for LTC_MD_AS: Initialize */
#define LTC_MD_AS_FINALIZE (0x2U) /*!< Bit field value for LTC_MD_AS: Finalize */
#define LTC_MD_AS_INIT_FINAL (0x3U) /*!< Bit field value for LTC_MD_AS: Initialize/Finalize */
enum _ltc_md_dk_bit_shift
{
kLTC_ModeRegBitShiftDK = 12U,
};
typedef enum _ltc_algorithm
{
kLTC_AlgorithmAES = LTC_MD_ALG_AES << LTC_MD_ALG_SHIFT,
#if defined(FSL_FEATURE_LTC_HAS_DES) && FSL_FEATURE_LTC_HAS_DES
kLTC_AlgorithmDES = LTC_MD_ALG_DES << LTC_MD_ALG_SHIFT,
kLTC_Algorithm3DES = LTC_MD_ALG_TRIPLE_DES << LTC_MD_ALG_SHIFT,
#endif /* FSL_FEATURE_LTC_HAS_DES */
} ltc_algorithm_t;
typedef enum _ltc_mode_symmetric_alg
{
kLTC_ModeCTR = 0x00U << LTC_MD_AAI_SHIFT,
kLTC_ModeCBC = 0x10U << LTC_MD_AAI_SHIFT,
kLTC_ModeECB = 0x20U << LTC_MD_AAI_SHIFT,
kLTC_ModeCFB = 0x30U << LTC_MD_AAI_SHIFT,
kLTC_ModeOFB = 0x40U << LTC_MD_AAI_SHIFT,
kLTC_ModeCMAC = 0x60U << LTC_MD_AAI_SHIFT,
kLTC_ModeXCBCMAC = 0x70U << LTC_MD_AAI_SHIFT,
kLTC_ModeCCM = 0x80U << LTC_MD_AAI_SHIFT,
kLTC_ModeGCM = 0x90U << LTC_MD_AAI_SHIFT,
} ltc_mode_symmetric_alg_t;
typedef enum _ltc_mode_encrypt
{
kLTC_ModeDecrypt = LTC_MD_ENC_DECRYPT << LTC_MD_ENC_SHIFT,
kLTC_ModeEncrypt = LTC_MD_ENC_ENCRYPT << LTC_MD_ENC_SHIFT,
} ltc_mode_encrypt_t;
typedef enum _ltc_mode_algorithm_state
{
kLTC_ModeUpdate = LTC_MD_AS_UPDATE << LTC_MD_AS_SHIFT,
kLTC_ModeInit = LTC_MD_AS_INITIALIZE << LTC_MD_AS_SHIFT,
kLTC_ModeFinalize = LTC_MD_AS_FINALIZE << LTC_MD_AS_SHIFT,
kLTC_ModeInitFinal = LTC_MD_AS_INIT_FINAL << LTC_MD_AS_SHIFT
} ltc_mode_algorithm_state_t;
/*******************************************************************************
* Prototypes
******************************************************************************/
extern status_t ltc_get_context(LTC_Type *base, uint8_t *dest, uint8_t dataSize, uint8_t startIndex);
extern status_t ltc_set_context(LTC_Type *base, const uint8_t *data, uint8_t dataSize, uint8_t startIndex);
extern status_t ltc_symmetric_update(LTC_Type *base,
const uint8_t *key,
uint8_t keySize,
ltc_algorithm_t alg,
ltc_mode_symmetric_alg_t mode,
ltc_mode_encrypt_t enc);
extern void ltc_memcpy(void *dst, const void *src, size_t size);
extern bool ltc_check_key_size(const uint32_t keySize);
extern status_t ltc_wait(LTC_Type *base);
extern void ltc_clear_all(LTC_Type *base, bool addPKHA);
extern status_t ltc_3des_check_input_args(ltc_mode_symmetric_alg_t modeAs,
uint32_t size,
const uint8_t *key1,
const uint8_t *key2);
extern void ltc_symmetric_process(LTC_Type *base, uint32_t inSize, const uint8_t **inData, uint8_t **outData);
extern status_t ltc_symmetric_process_data(LTC_Type *base, const uint8_t *inData, uint32_t inSize, uint8_t *outData);
static uint32_t LTC_GetInstance(LTC_Type *base);
static void ltc_symmetric_process_EDMA(LTC_Type *base, uint32_t inSize, const uint8_t **inData, uint8_t **outData);
static status_t ltc_process_message_in_sessions_EDMA(LTC_Type *base, ltc_edma_handle_t *handle);
/*******************************************************************************
* Code
******************************************************************************/
/*******************************************************************************
* LTC Common code static
******************************************************************************/
/*!
* @brief Splits the LTC job into sessions. Used for CBC, CTR, CFB, OFB cipher block modes.
*
* @param base LTC peripheral base address
* @param inData Input data to process.
* @param inSize Input size of the input buffer.
* @param outData Output data buffer.
*/
static status_t ltc_process_message_in_sessions_EDMA(LTC_Type *base, ltc_edma_handle_t *handle)
{
status_t retval;
bool exit_sm = false;
handle->modeReg = base->MD;
retval = kStatus_Success;
if ((!handle->inData) || (!handle->outData))
{
handle->state = LTC_SM_STATE_FINISH; /* END */
retval = kStatus_InvalidArgument;
}
while (exit_sm == false)
{
switch (handle->state)
{
case LTC_SM_STATE_START:
if (handle->size)
{
uint32_t sz;
if (handle->size <= LTC_FIFO_SZ_MAX_DOWN_ALGN)
{
sz = handle->size;
}
else
{
sz = LTC_FIFO_SZ_MAX_DOWN_ALGN;
}
/* retval = ltc_symmetric_process_data_EDMA(base, handle->inData, sz, handle->outData); */
{
uint32_t lastSize;
uint32_t inSize = sz;
/* Write the data size. */
base->DS = inSize;
/* Split the inSize into full 16-byte chunks and last incomplete block due to LTC AES OFIFO
* errata */
if (inSize <= 16u)
{
lastSize = inSize;
inSize = 0;
}
else
{
/* Process all 16-byte data chunks. */
lastSize = inSize % 16u;
if (lastSize == 0)
{
lastSize = 16;
inSize -= 16;
}
else
{
inSize -=
lastSize; /* inSize will be rounded down to 16 byte boundary. remaining bytes in
lastSize */
}
}
if (inSize)
{
handle->size -= inSize;
ltc_symmetric_process_EDMA(base, inSize, &handle->inData, &handle->outData);
exit_sm = true;
}
else if (lastSize)
{
ltc_symmetric_process(base, lastSize, &handle->inData, &handle->outData);
retval = ltc_wait(base);
handle->size -= lastSize;
}
else
{
}
}
}
else
{
handle->state = LTC_SM_STATE_FINISH;
}
break;
case LTC_SM_STATE_FINISH:
default:
base->MD = handle->modeReg;
ltc_clear_all(base, false);
if (handle->callback)
{
handle->callback(base, handle, retval, handle->userData);
}
exit_sm = true;
break;
}
}
return retval;
}
/*!
* @brief Splits the LTC job into sessions. Used for CBC, CTR, CFB, OFB cipher block modes.
*
* @param base LTC peripheral base address
* @param inData Input data to process.
* @param inSize Input size of the input buffer.
* @param outData Output data buffer.
*/
static status_t ltc_process_message_in_sessions_ctr_EDMA(LTC_Type *base, ltc_edma_handle_t *handle)
{
status_t retval;
bool exit_sm = false;
handle->modeReg = base->MD;
retval = kStatus_Success;
if ((!handle->inData) || (!handle->outData))
{
handle->state = LTC_SM_STATE_FINISH;
retval = kStatus_InvalidArgument;
}
while (exit_sm == false)
{
switch (handle->state)
{
case LTC_SM_STATE_START:
if (handle->size)
{
uint32_t sz;
if (handle->size <= LTC_FIFO_SZ_MAX_DOWN_ALGN)
{
sz = handle->size;
}
else
{
sz = LTC_FIFO_SZ_MAX_DOWN_ALGN;
}
/* retval = ltc_symmetric_process_data_EDMA(base, handle->inData, sz, handle->outData); */
{
uint32_t lastSize;
uint32_t inSize = sz;
/* Write the data size. */
base->DS = inSize;
/* Split the inSize into full 16-byte chunks and last incomplete block due to LTC AES OFIFO
* errata */
if (inSize <= 16u)
{
lastSize = inSize;
inSize = 0;
}
else
{
/* Process all 16-byte data chunks. */
lastSize = inSize % 16u;
if (lastSize == 0)
{
lastSize = 16;
inSize -= 16;
}
else
{
inSize -=
lastSize; /* inSize will be rounded down to 16 byte boundary. remaining bytes in
lastSize */
}
}
if (inSize)
{
handle->size -= inSize;
ltc_symmetric_process_EDMA(base, inSize, &handle->inData, &handle->outData);
exit_sm = true;
}
else if (lastSize)
{
ltc_symmetric_process(base, lastSize, &handle->inData, &handle->outData);
retval = ltc_wait(base);
handle->size -= lastSize;
}
else
{
}
}
}
else
{
handle->state = LTC_SM_STATE_FINISH;
}
break;
case LTC_SM_STATE_FINISH:
default:
base->MD = handle->modeReg;
/* CTR final phase.*/
if (kStatus_Success == retval)
{
const uint8_t *input = handle->inData;
uint8_t *output = handle->outData;
if ((handle->counterlast != NULL) && (handle->lastSize))
{
uint8_t zeroes[16] = {0};
ltc_mode_t modeReg;
modeReg = (uint32_t)kLTC_AlgorithmAES | (uint32_t)kLTC_ModeCTR | (uint32_t)kLTC_ModeEncrypt;
/* Write the mode register to the hardware. */
base->MD = modeReg | (uint32_t)kLTC_ModeFinalize;
/* context is re-used (CTRi) */
/* Process data and return status. */
retval = ltc_symmetric_process_data(base, input, handle->lastSize, output);
if (kStatus_Success == retval)
{
if (handle->szLeft)
{
*handle->szLeft = 16U - handle->lastSize;
}
/* Initialize algorithm state. */
base->MD = modeReg | (uint32_t)kLTC_ModeUpdate;
/* context is re-used (CTRi) */
/* Process data and return status. */
retval = ltc_symmetric_process_data(base, zeroes, 16U, handle->counterlast);
}
}
if (kStatus_Success == retval)
{
ltc_get_context(base, &handle->counter[0], 16U, 4U);
ltc_clear_all(base, false);
}
}
if (handle->callback)
{
handle->callback(base, handle, retval, handle->userData);
}
exit_sm = true;
break;
}
}
return retval;
}
/*******************************************************************************
* AES Code public
******************************************************************************/
status_t LTC_AES_EncryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t *key,
uint32_t keySize)
{
status_t retval;
if ((ltc_check_key_size(keySize) == 0) || (size < 16u) ||
(size % 16u)) /* ECB mode, size must be 16-byte multiple */
{
if (handle->callback)
{
handle->callback(base, handle, kStatus_InvalidArgument, handle->userData);
}
return kStatus_InvalidArgument;
}
/* Initialize algorithm state. */
ltc_symmetric_update(base, key, keySize, kLTC_AlgorithmAES, kLTC_ModeECB, kLTC_ModeEncrypt);
/* Process data and return status. */
handle->inData = &plaintext[0];
handle->outData = &ciphertext[0];
handle->size = size;
handle->state = LTC_SM_STATE_START;
handle->state_machine = ltc_process_message_in_sessions_EDMA;
retval = handle->state_machine(base, handle);
return retval;
}
status_t LTC_AES_DecryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t *key,
uint32_t keySize,
ltc_aes_key_t keyType)
{
status_t status;
if ((ltc_check_key_size(keySize) == 0) || (size < 16u) ||
(size % 16u)) /* ECB mode, size must be 16-byte multiple */
{
if (handle->callback)
{
handle->callback(base, handle, kStatus_InvalidArgument, handle->userData);
}
return kStatus_InvalidArgument;
}
/* Initialize algorithm state. */
ltc_symmetric_update(base, key, keySize, kLTC_AlgorithmAES, kLTC_ModeECB, kLTC_ModeDecrypt);
/* set DK bit in the LTC Mode Register AAI field for directly loaded decrypt keys */
if (keyType == kLTC_DecryptKey)
{
base->MD |= (1U << kLTC_ModeRegBitShiftDK);
}
/* Process data and return status. */
handle->inData = &ciphertext[0];
handle->outData = &plaintext[0];
handle->size = size;
handle->state = LTC_SM_STATE_START;
handle->state_machine = ltc_process_message_in_sessions_EDMA;
status = handle->state_machine(base, handle);
return status;
}
status_t LTC_AES_EncryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_AES_IV_SIZE],
const uint8_t *key,
uint32_t keySize)
{
status_t retval;
if ((ltc_check_key_size(keySize) == 0) || (size < 16u) ||
(size % 16u)) /* CBC mode, size must be 16-byte multiple */
{
if (handle->callback)
{
handle->callback(base, handle, kStatus_InvalidArgument, handle->userData);
}
return kStatus_InvalidArgument;
}
/* Initialize algorithm state. */
ltc_symmetric_update(base, key, keySize, kLTC_AlgorithmAES, kLTC_ModeCBC, kLTC_ModeEncrypt);
/* Write IV data to the context register. */
ltc_set_context(base, &iv[0], LTC_AES_IV_SIZE, 0);
/* Process data and return status. */
handle->inData = &plaintext[0];
handle->outData = &ciphertext[0];
handle->size = size;
handle->state = LTC_SM_STATE_START;
handle->state_machine = ltc_process_message_in_sessions_EDMA;
retval = handle->state_machine(base, handle);
return retval;
}
status_t LTC_AES_DecryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_AES_IV_SIZE],
const uint8_t *key,
uint32_t keySize,
ltc_aes_key_t keyType)
{
status_t retval;
if ((ltc_check_key_size(keySize) == 0) || (size < 16u) ||
(size % 16u)) /* CBC mode, size must be 16-byte multiple */
{
if (handle->callback)
{
handle->callback(base, handle, kStatus_InvalidArgument, handle->userData);
}
return kStatus_InvalidArgument;
}
/* set DK bit in the LTC Mode Register AAI field for directly loaded decrypt keys */
if (keyType == kLTC_DecryptKey)
{
base->MD |= (1U << kLTC_ModeRegBitShiftDK);
}
/* Initialize algorithm state. */
ltc_symmetric_update(base, key, keySize, kLTC_AlgorithmAES, kLTC_ModeCBC, kLTC_ModeDecrypt);
/* Write IV data to the context register. */
ltc_set_context(base, &iv[0], LTC_AES_IV_SIZE, 0);
/* Process data and return status. */
handle->inData = &ciphertext[0];
handle->outData = &plaintext[0];
handle->size = size;
handle->state = LTC_SM_STATE_START;
handle->state_machine = ltc_process_message_in_sessions_EDMA;
retval = handle->state_machine(base, handle);
return retval;
}
status_t LTC_AES_CryptCtrEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *input,
uint8_t *output,
uint32_t size,
uint8_t counter[LTC_AES_BLOCK_SIZE],
const uint8_t *key,
uint32_t keySize,
uint8_t counterlast[LTC_AES_BLOCK_SIZE],
uint32_t *szLeft)
{
status_t retval;
uint32_t lastSize;
if (!ltc_check_key_size(keySize))
{
if (handle->callback)
{
handle->callback(base, handle, kStatus_InvalidArgument, handle->userData);
}
return kStatus_InvalidArgument;
}
lastSize = 0U;
if (counterlast != NULL)
{
/* Split the size into full 16-byte chunks and last incomplete block due to LTC AES OFIFO errata */
if (size <= 16U)
{
lastSize = size;
size = 0U;
}
else
{
/* Process all 16-byte data chunks. */
lastSize = size % 16U;
if (lastSize == 0U)
{
lastSize = 16U;
size -= 16U;
}
else
{
size -= lastSize; /* size will be rounded down to 16 byte boundary. remaining bytes in lastSize */
}
}
}
/* Initialize algorithm state. */
ltc_symmetric_update(base, key, keySize, kLTC_AlgorithmAES, kLTC_ModeCTR, kLTC_ModeEncrypt);
/* Write initial counter data to the context register.
* NOTE the counter values start at 4-bytes offset into the context. */
ltc_set_context(base, &counter[0], 16U, 4U);
/* Process data and return status. */
handle->inData = &input[0];
handle->outData = &output[0];
handle->size = size;
handle->state = LTC_SM_STATE_START;
handle->state_machine = ltc_process_message_in_sessions_ctr_EDMA;
handle->counter = counter;
handle->key = key;
handle->keySize = keySize;
handle->counterlast = counterlast;
handle->szLeft = szLeft;
handle->lastSize = lastSize;
retval = handle->state_machine(base, handle);
return retval;
}
#if defined(FSL_FEATURE_LTC_HAS_DES) && FSL_FEATURE_LTC_HAS_DES
/*******************************************************************************
* DES / 3DES Code static
******************************************************************************/
static status_t ltc_des_process_EDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *input,
uint8_t *output,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key[LTC_DES_KEY_SIZE],
ltc_mode_symmetric_alg_t modeAs,
ltc_mode_encrypt_t modeEnc)
{
status_t retval;
/* all but OFB, size must be 8-byte multiple */
if ((modeAs != kLTC_ModeOFB) && ((size < 8u) || (size % 8u)))
{
if (handle->callback)
{
handle->callback(base, handle, kStatus_InvalidArgument, handle->userData);
}
return kStatus_InvalidArgument;
}
/* Initialize algorithm state. */
ltc_symmetric_update(base, &key[0], LTC_DES_KEY_SIZE, kLTC_AlgorithmDES, modeAs, modeEnc);
if ((modeAs != kLTC_ModeECB))
{
ltc_set_context(base, iv, LTC_DES_IV_SIZE, 0);
}
/* Process data and return status. */
handle->inData = input;
handle->outData = output;
handle->size = size;
handle->state = LTC_SM_STATE_START;
handle->state_machine = ltc_process_message_in_sessions_EDMA;
retval = handle->state_machine(base, handle);
return retval;
}
static status_t ltc_3des_process_EDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *input,
uint8_t *output,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE],
ltc_mode_symmetric_alg_t modeAs,
ltc_mode_encrypt_t modeEnc)
{
status_t retval;
uint8_t key[LTC_DES_KEY_SIZE * 3];
uint8_t keySize = LTC_DES_KEY_SIZE * 2;
retval = ltc_3des_check_input_args(modeAs, size, key1, key2);
if (kStatus_Success != retval)
{
if (handle->callback)
{
handle->callback(base, handle, kStatus_InvalidArgument, handle->userData);
}
return retval;
}
ltc_memcpy(&key[0], &key1[0], LTC_DES_KEY_SIZE);
ltc_memcpy(&key[LTC_DES_KEY_SIZE], &key2[0], LTC_DES_KEY_SIZE);
if (key3)
{
ltc_memcpy(&key[LTC_DES_KEY_SIZE * 2], &key3[0], LTC_DES_KEY_SIZE);
keySize = sizeof(key);
}
/* Initialize algorithm state. */
ltc_symmetric_update(base, &key[0], keySize, kLTC_Algorithm3DES, modeAs, modeEnc);
if ((modeAs != kLTC_ModeECB))
{
ltc_set_context(base, iv, LTC_DES_IV_SIZE, 0);
}
/* Process data and return status. */
handle->inData = input;
handle->outData = output;
handle->size = size;
handle->state = LTC_SM_STATE_START;
handle->state_machine = ltc_process_message_in_sessions_EDMA;
retval = handle->state_machine(base, handle);
return retval;
}
/*******************************************************************************
* DES / 3DES Code public
******************************************************************************/
status_t LTC_DES_EncryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, plaintext, ciphertext, size, NULL, key, kLTC_ModeECB, kLTC_ModeEncrypt);
}
status_t LTC_DES_DecryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, ciphertext, plaintext, size, NULL, key, kLTC_ModeECB, kLTC_ModeDecrypt);
}
status_t LTC_DES_EncryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key, kLTC_ModeCBC, kLTC_ModeEncrypt);
}
status_t LTC_DES_DecryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key, kLTC_ModeCBC, kLTC_ModeDecrypt);
}
status_t LTC_DES_EncryptCfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key, kLTC_ModeCFB, kLTC_ModeEncrypt);
}
status_t LTC_DES_DecryptCfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key, kLTC_ModeCFB, kLTC_ModeDecrypt);
}
status_t LTC_DES_EncryptOfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key, kLTC_ModeOFB, kLTC_ModeEncrypt);
}
status_t LTC_DES_DecryptOfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key[LTC_DES_KEY_SIZE])
{
return ltc_des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key, kLTC_ModeOFB, kLTC_ModeDecrypt);
}
status_t LTC_DES2_EncryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, NULL, key1, key2, NULL, kLTC_ModeECB,
kLTC_ModeEncrypt);
}
status_t LTC_DES3_EncryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, NULL, key1, key2, key3, kLTC_ModeECB,
kLTC_ModeEncrypt);
}
status_t LTC_DES2_DecryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, NULL, key1, key2, NULL, kLTC_ModeECB,
kLTC_ModeDecrypt);
}
status_t LTC_DES3_DecryptEcbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, NULL, key1, key2, key3, kLTC_ModeECB,
kLTC_ModeDecrypt);
}
status_t LTC_DES2_EncryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key1, key2, NULL, kLTC_ModeCBC,
kLTC_ModeEncrypt);
}
status_t LTC_DES3_EncryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key1, key2, key3, kLTC_ModeCBC,
kLTC_ModeEncrypt);
}
status_t LTC_DES2_DecryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key1, key2, NULL, kLTC_ModeCBC,
kLTC_ModeDecrypt);
}
status_t LTC_DES3_DecryptCbcEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key1, key2, key3, kLTC_ModeCBC,
kLTC_ModeDecrypt);
}
status_t LTC_DES2_EncryptCfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key1, key2, NULL, kLTC_ModeCFB,
kLTC_ModeEncrypt);
}
status_t LTC_DES3_EncryptCfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key1, key2, key3, kLTC_ModeCFB,
kLTC_ModeEncrypt);
}
status_t LTC_DES2_DecryptCfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key1, key2, NULL, kLTC_ModeCFB,
kLTC_ModeDecrypt);
}
status_t LTC_DES3_DecryptCfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key1, key2, key3, kLTC_ModeCFB,
kLTC_ModeDecrypt);
}
status_t LTC_DES2_EncryptOfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key1, key2, NULL, kLTC_ModeOFB,
kLTC_ModeEncrypt);
}
status_t LTC_DES3_EncryptOfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *plaintext,
uint8_t *ciphertext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, plaintext, ciphertext, size, iv, key1, key2, key3, kLTC_ModeOFB,
kLTC_ModeEncrypt);
}
status_t LTC_DES2_DecryptOfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key1, key2, NULL, kLTC_ModeOFB,
kLTC_ModeDecrypt);
}
status_t LTC_DES3_DecryptOfbEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
const uint8_t *ciphertext,
uint8_t *plaintext,
uint32_t size,
const uint8_t iv[LTC_DES_IV_SIZE],
const uint8_t key1[LTC_DES_KEY_SIZE],
const uint8_t key2[LTC_DES_KEY_SIZE],
const uint8_t key3[LTC_DES_KEY_SIZE])
{
return ltc_3des_process_EDMA(base, handle, ciphertext, plaintext, size, iv, key1, key2, key3, kLTC_ModeOFB,
kLTC_ModeDecrypt);
}
#endif /* FSL_FEATURE_LTC_HAS_DES */
/*********************** LTC EDMA tools ***************************************/
static uint32_t LTC_GetInstance(LTC_Type *base)
{
uint32_t instance = 0;
uint32_t i;
for (i = 0; i < FSL_FEATURE_SOC_LTC_COUNT; i++)
{
if (s_ltcBase[instance] == base)
{
instance = i;
break;
}
}
return instance;
}
/*!
* @brief Enable or disable LTC Input FIFO DMA request.
*
* This function enables or disables DMA request and done signals for Input FIFO.
*
* @param base LTC peripheral base address.
* @param enable True to enable, false to disable.
*/
static inline void LTC_EnableInputFifoDMA(LTC_Type *base, bool enable)
{
if (enable)
{
base->CTL |= LTC_CTL_IFE_MASK;
}
else
{
base->CTL &= ~LTC_CTL_IFE_MASK;
}
}
/*!
* @brief Enable or disable LTC Output FIFO DMA request.
*
* This function enables or disables DMA request and done signals for Output FIFO.
*
* @param base LTC peripheral base address.
* @param enable True to enable, false to disable.
*/
static inline void LTC_EnableOutputFifoDMA(LTC_Type *base, bool enable)
{
if (enable)
{
base->CTL |= LTC_CTL_OFE_MASK;
}
else
{
base->CTL &= ~LTC_CTL_OFE_MASK;
}
}
static void LTC_InputFifoEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
{
ltc_edma_private_handle_t *ltcPrivateHandle = (ltc_edma_private_handle_t *)param;
/* Avoid the warning for unused variables. */
handle = handle;
tcds = tcds;
if (transferDone)
{
/* Stop DMA channel. */
EDMA_StopTransfer(ltcPrivateHandle->handle->inputFifoEdmaHandle);
/* Disable Input Fifo DMA */
LTC_EnableInputFifoDMA(ltcPrivateHandle->base, false);
}
}
static void LTC_OutputFifoEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
{
ltc_edma_private_handle_t *ltcPrivateHandle = (ltc_edma_private_handle_t *)param;
/* Avoid the warning for unused variables. */
handle = handle;
tcds = tcds;
if (transferDone)
{
/* Stop DMA channel. */
EDMA_StopTransfer(ltcPrivateHandle->handle->outputFifoEdmaHandle);
/* Disable Output Fifo DMA */
LTC_EnableOutputFifoDMA(ltcPrivateHandle->base, false);
if (ltcPrivateHandle->handle->state_machine)
{
ltcPrivateHandle->handle->state_machine(ltcPrivateHandle->base, ltcPrivateHandle->handle);
}
}
}
/* @brief Copy data to Input FIFO and reading from Ouput FIFO using eDMA. */
static void ltc_symmetric_process_EDMA(LTC_Type *base, uint32_t inSize, const uint8_t **inData, uint8_t **outData)
{
const uint8_t *in = *inData;
uint8_t *out = *outData;
uint32_t instance = LTC_GetInstance(base);
uint32_t entry_number = inSize / sizeof(uint32_t);
const uint8_t *inputBuffer = *inData;
uint8_t *outputBuffer = *outData;
edma_transfer_config_t config;
if (entry_number)
{
/* =========== Init Input FIFO DMA ======================*/
memset(&config, 0, sizeof(config));
/* Prepare transfer. */
EDMA_PrepareTransfer(&config, (void *)inputBuffer, 1, (void *)(&((base)->IFIFO)), 4U, 4U, entry_number * 4,
kEDMA_MemoryToPeripheral);
/* Submit transfer. */
EDMA_SubmitTransfer(s_edmaPrivateHandle[instance].handle->inputFifoEdmaHandle, &config);
/* Set request size.*/
base->CTL &= ~LTC_CTL_IFR_MASK; /* 1 entry */
/* Enable Input Fifo DMA */
LTC_EnableInputFifoDMA(base, true);
/* Start the DMA channel */
EDMA_StartTransfer(s_edmaPrivateHandle[instance].handle->inputFifoEdmaHandle);
/* =========== Init Output FIFO DMA ======================*/
memset(&config, 0, sizeof(config));
/* Prepare transfer. */
EDMA_PrepareTransfer(&config, (void *)(&((base)->OFIFO)), 4U, (void *)outputBuffer, 1U, 4U, entry_number * 4,
kEDMA_PeripheralToMemory);
/* Submit transfer. */
EDMA_SubmitTransfer(s_edmaPrivateHandle[instance].handle->outputFifoEdmaHandle, &config);
/* Set request size.*/
base->CTL &= ~LTC_CTL_OFR_MASK; /* 1 entry */
/* Enable Output Fifo DMA */
LTC_EnableOutputFifoDMA(base, true);
/* Start the DMA channel */
EDMA_StartTransfer(s_edmaPrivateHandle[instance].handle->outputFifoEdmaHandle);
{ /* Dummy read of LTC register. Do not delete.*/
volatile uint32_t status_reg;
status_reg = (base)->STA;
(void)status_reg;
}
out += entry_number * sizeof(uint32_t);
in += entry_number * sizeof(uint32_t);
*inData = in;
*outData = out;
}
}
void LTC_CreateHandleEDMA(LTC_Type *base,
ltc_edma_handle_t *handle,
ltc_edma_callback_t callback,
void *userData,
edma_handle_t *inputFifoEdmaHandle,
edma_handle_t *outputFifoEdmaHandle)
{
assert(handle);
assert(inputFifoEdmaHandle);
assert(outputFifoEdmaHandle);
uint32_t instance = LTC_GetInstance(base);
s_edmaPrivateHandle[instance].base = base;
s_edmaPrivateHandle[instance].handle = handle;
memset(handle, 0, sizeof(*handle));
handle->inputFifoEdmaHandle = inputFifoEdmaHandle;
handle->outputFifoEdmaHandle = outputFifoEdmaHandle;
handle->callback = callback;
handle->userData = userData;
/* Register DMA callback functions */
EDMA_SetCallback(handle->inputFifoEdmaHandle, LTC_InputFifoEDMACallback, &s_edmaPrivateHandle[instance]);
EDMA_SetCallback(handle->outputFifoEdmaHandle, LTC_OutputFifoEDMACallback, &s_edmaPrivateHandle[instance]);
/* Set request size. DMA request size is 1 entry.*/
base->CTL &= ~LTC_CTL_IFR_MASK;
base->CTL &= ~LTC_CTL_OFR_MASK;
}