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/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "hal.h"
#if (HAL_USE_CRY == TRUE) || defined(__DOXYGEN__)
#include "sama_crypto_lld.h"
#include "sama_tdes_lld.h"
enum tdesd_key_mode_t {
TDES_KEY_THREE = 0, TDES_KEY_TWO
};
void tdes_set_input(uint32_t* data0, uint32_t* data1) {
TDES->TDES_IDATAR[0] = *data0;
if (data1)
TDES->TDES_IDATAR[1] = *data1;
}
void tdes_get_output(uint32_t *data0, uint32_t *data1) {
*data0 = TDES->TDES_ODATAR[0];
if (data1)
*data1 = TDES->TDES_ODATAR[1];
}
cryerror_t sama_tdes_lld_polling(CRYDriver *cryp, tdes_config_t *params,
bool encrypt, const uint8_t *data, size_t data_len, uint8_t * out,
const uint8_t *iv) {
uint32_t mode = 0;
uint32_t i;
uint8_t size = 8;
uint32_t *vectors = (uint32_t *) iv;
osalMutexLock(&cryp->mutex);
//soft reset
TDES->TDES_CR = TDES_CR_SWRST;
//configure
if (encrypt)
mode |= TDES_MR_CIPHER_ENCRYPT;
else
mode |= TDES_MR_CIPHER_DECRYPT;
if (cryp->key0_size == 16)
mode |= (TDES_KEY_TWO << 4);
else
mode |= (TDES_KEY_THREE << 4);
mode |= TDES_MR_TDESMOD(params->algo);
mode |= TDES_MR_SMOD_MANUAL_START;
mode |= TDES_MR_OPMOD(params->mode);
if (cryp->config != NULL) {
mode |= TDES_MR_CFBS(cryp->config->cfbs);
if (params->mode == TDES_MODE_CFB) {
if (cryp->config->cfbs == TDES_CFBS_32)
size = 4;
else if (cryp->config->cfbs == TDES_CFBS_16)
size = 2;
else if (cryp->config->cfbs == TDES_CFBS_8)
size = 1;
}
}
TDES->TDES_MR = mode;
//write keys
TDES->TDES_KEY1WR[0] = cryp->key0_buffer[0];
TDES->TDES_KEY1WR[1] = cryp->key0_buffer[1];
if (cryp->key0_size > 8) {
TDES->TDES_KEY2WR[0] = cryp->key0_buffer[2];
TDES->TDES_KEY2WR[1] = cryp->key0_buffer[3];
} else {
TDES->TDES_KEY2WR[0] = 0x0;
TDES->TDES_KEY2WR[1] = 0x0;
}
if (cryp->key0_size > 16) {
TDES->TDES_KEY3WR[0] = cryp->key0_buffer[4];
TDES->TDES_KEY3WR[1] = cryp->key0_buffer[5];
} else {
TDES->TDES_KEY3WR[0] = 0x0;
TDES->TDES_KEY3WR[1] = 0x0;
}
/* The Initialization Vector Registers apply to all modes except ECB. */
if (params->mode != TDES_MODE_ECB && vectors != NULL) {
TDES->TDES_IVR[0] = vectors[0];
TDES->TDES_IVR[1] = vectors[1];
}
if (params->algo == TDES_ALGO_XTEA) {
TDES->TDES_XTEA_RNDR = TDES_XTEA_RNDR_XTEA_RNDS(32);
}
//load 64 bit data size in tdes registers
for (i = 0; i < data_len; i += size) {
if (size == 8)
tdes_set_input((uint32_t *) ((data) + i),
(uint32_t *) ((data) + i + 4));
else
tdes_set_input((uint32_t *) ((data) + i), NULL);
//Start TDES
TDES->TDES_CR = TDES_CR_START;
//check status
while ((TDES->TDES_ISR & TDES_ISR_DATRDY) != TDES_ISR_DATRDY)
;
if (size == 8)
tdes_get_output((uint32_t *) ((out) + i),
(uint32_t *) ((out) + i + 4));
else
tdes_get_output((uint32_t *) ((out) + i), NULL);
}
osalMutexUnlock(&cryp->mutex);
return CRY_NOERROR;
}
cryerror_t sama_tdes_lld_dma(CRYDriver *cryp, tdes_config_t *params,
bool encrypt, const uint8_t *data, size_t data_len, uint8_t * out,
const uint8_t *iv) {
uint32_t mode = 0;
uint32_t *vectors = (uint32_t *) iv;
osalMutexLock(&cryp->mutex);
cryp->dmachunksize = DMA_CHUNK_SIZE_1;
cryp->dmawith = DMA_DATA_WIDTH_WORD;
if ((params->mode == TDES_MODE_CFB)) {
if (cryp->config->cfbs == TDES_CFBS_16)
cryp->dmawith = DMA_DATA_WIDTH_HALF_WORD;
if (cryp->config->cfbs == TDES_CFBS_8)
cryp->dmawith = DMA_DATA_WIDTH_BYTE;
}
cryp->rxdmamode = XDMAC_CC_TYPE_PER_TRAN |
XDMAC_CC_PROT_SEC |
XDMAC_CC_MBSIZE_SINGLE |
XDMAC_CC_DSYNC_PER2MEM | XDMAC_CC_CSIZE(cryp->dmachunksize) |
XDMAC_CC_DWIDTH(cryp->dmawith) |
XDMAC_CC_SIF_AHB_IF1 |
XDMAC_CC_DIF_AHB_IF0 |
XDMAC_CC_SAM_FIXED_AM |
XDMAC_CC_DAM_INCREMENTED_AM |
XDMAC_CC_PERID(PERID_TDES_RX);
cryp->txdmamode = XDMAC_CC_TYPE_PER_TRAN |
XDMAC_CC_PROT_SEC |
XDMAC_CC_MBSIZE_SINGLE |
XDMAC_CC_DSYNC_MEM2PER | XDMAC_CC_CSIZE(cryp->dmachunksize) |
XDMAC_CC_DWIDTH(cryp->dmawith) |
XDMAC_CC_SIF_AHB_IF0 |
XDMAC_CC_DIF_AHB_IF1 |
XDMAC_CC_SAM_INCREMENTED_AM |
XDMAC_CC_DAM_FIXED_AM |
XDMAC_CC_PERID(PERID_TDES_TX);
dmaChannelSetMode(cryp->dmarx, cryp->rxdmamode);
dmaChannelSetMode(cryp->dmatx, cryp->txdmamode);
// Writing channel
dmaChannelSetSource(cryp->dmatx, data);
dmaChannelSetDestination(cryp->dmatx, TDES->TDES_IDATAR);
dmaChannelSetTransactionSize(cryp->dmatx,
(data_len / DMA_DATA_WIDTH_TO_BYTE(cryp->dmawith)));
// Reading channel
dmaChannelSetSource(cryp->dmarx, TDES->TDES_ODATAR);
dmaChannelSetDestination(cryp->dmarx, out);
dmaChannelSetTransactionSize(cryp->dmarx,
(data_len / DMA_DATA_WIDTH_TO_BYTE(cryp->dmawith)));
//soft reset
TDES->TDES_CR = TDES_CR_SWRST;
//configure
if (encrypt)
mode |= TDES_MR_CIPHER_ENCRYPT;
else
mode |= TDES_MR_CIPHER_DECRYPT;
if (cryp->key0_size == 16)
mode |= (TDES_KEY_TWO << 4);
else
mode |= (TDES_KEY_THREE << 4);
mode |= TDES_MR_TDESMOD(params->algo);
mode |= TDES_MR_SMOD_IDATAR0_START;
mode |= TDES_MR_OPMOD(params->mode);
if (cryp->config != NULL) {
mode |= TDES_MR_CFBS(cryp->config->cfbs);
}
TDES->TDES_MR = mode;
//write keys
TDES->TDES_KEY1WR[0] = cryp->key0_buffer[0];
TDES->TDES_KEY1WR[1] = cryp->key0_buffer[1];
if (cryp->key0_size > 8) {
TDES->TDES_KEY2WR[0] = cryp->key0_buffer[2];
TDES->TDES_KEY2WR[1] = cryp->key0_buffer[3];
} else {
TDES->TDES_KEY2WR[0] = 0x0;
TDES->TDES_KEY2WR[1] = 0x0;
}
if (cryp->key0_size > 16) {
TDES->TDES_KEY3WR[0] = cryp->key0_buffer[4];
TDES->TDES_KEY3WR[1] = cryp->key0_buffer[5];
} else {
TDES->TDES_KEY3WR[0] = 0x0;
TDES->TDES_KEY3WR[1] = 0x0;
}
//initialize vectors registers ( except ECB mode)
if (params->mode != TDES_MODE_ECB && vectors != NULL) {
TDES->TDES_IVR[0] = vectors[0];
TDES->TDES_IVR[1] = vectors[1];
}
if (params->algo == TDES_ALGO_XTEA) {
TDES->TDES_XTEA_RNDR = TDES_XTEA_RNDR_XTEA_RNDS(32);
}
//enable interrutps
TDES->TDES_IER = TDES_IER_DATRDY;
osalSysLock();
dmaChannelEnable(cryp->dmarx);
dmaChannelEnable(cryp->dmatx);
osalThreadSuspendS(&cryp->thread);
osalSysUnlock();
osalMutexUnlock(&cryp->mutex);
return CRY_NOERROR;
}
#endif /* HAL_USE_CRY */
/** @} */
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