206 lines
7.3 KiB
C
206 lines
7.3 KiB
C
/*!
|
|
\file main.c
|
|
\brief CAU TDESECB mode example
|
|
|
|
\version 2021-10-30, V1.0.0, firmware for GD32W51x
|
|
*/
|
|
|
|
/*
|
|
Copyright (c) 2021, GigaDevice Semiconductor Inc.
|
|
|
|
Redistribution and use in source and binary forms, with or without modification,
|
|
are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this
|
|
list of conditions and the following disclaimer.
|
|
2. 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.
|
|
3. Neither the name of the copyright holder 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 "main.h"
|
|
#include "gd32w515p_eval.h"
|
|
|
|
/* 192 bit key */
|
|
uint32_t tdes_key[6]={
|
|
0x40414243,0x44454647, /* KEY1 */
|
|
0x48494A4B,0x4C4D4E4F, /* KEY2 */
|
|
0x50515253,0x54555657}; /* KEY3 */
|
|
uint32_t plaintext[DATA_SIZE]={
|
|
0x20212223,0x24252627, /* block 0 */
|
|
0x28292a2b,0x2c2d2e2f, /* block 1 */
|
|
0xFFEEDDCC,0xBBAA9988, /* block 2 */
|
|
0x77665544,0x33221100, /* block 3 */
|
|
0x10000000,0x20000000 }; /* block 4 */
|
|
uint32_t encrypt_result[DATA_SIZE];
|
|
uint32_t decrypt_result[DATA_SIZE];
|
|
|
|
/* encrypt/decrypt data using TDES */
|
|
static void tdes_dma(uint32_t mode, uint32_t *source, uint32_t *dest);
|
|
/* printf data by a block of 8 bytes */
|
|
static void data_display(uint32_t datalength, uint32_t *data);
|
|
|
|
/*!
|
|
\brief main function
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
int main(void)
|
|
{
|
|
gd_eval_com_init(EVAL_COM0);
|
|
|
|
printf(" plain data :\r\n");
|
|
data_display(DATA_SIZE, plaintext);
|
|
|
|
/* encrypt */
|
|
tdes_dma(CAU_ENCRYPT, plaintext, encrypt_result);
|
|
printf(" \r\nTDES encrypted data:\r\n\r\n");
|
|
data_display(DATA_SIZE, encrypt_result);
|
|
|
|
/* decrypt */
|
|
tdes_dma(CAU_DECRYPT, encrypt_result, decrypt_result);
|
|
printf(" \r\nTDES decrypted data:\r\n\r\n");
|
|
data_display(DATA_SIZE, decrypt_result);
|
|
|
|
while(1){
|
|
}
|
|
}
|
|
|
|
/*!
|
|
\brief encrypt/decrypt data using TDES
|
|
\param[in] mode: algorithm direction
|
|
\arg CAU_ENCRYPT: encrypt
|
|
\arg CAU_DECRYPT: decrypt
|
|
\param[in] source: pointer to the source address
|
|
\param[in] dest: pointer to the dest address
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
static void tdes_dma(uint32_t mode, uint32_t *source, uint32_t *dest)
|
|
{
|
|
cau_key_parameter_struct key_initpara;
|
|
dma_single_data_parameter_struct dma_initpara;
|
|
|
|
/* enable CAU clock */
|
|
rcu_periph_clock_enable(RCU_CAU);
|
|
/* Enable DMA1 clock */
|
|
rcu_periph_clock_enable(RCU_DMA1);
|
|
|
|
cau_fifo_flush();
|
|
|
|
/* key structure initialization */
|
|
cau_key_struct_para_init(&key_initpara);
|
|
key_initpara.key_1_high = tdes_key[0];
|
|
key_initpara.key_1_low = tdes_key[1];
|
|
key_initpara.key_2_high = tdes_key[2];
|
|
key_initpara.key_2_low = tdes_key[3];
|
|
key_initpara.key_3_high = tdes_key[4];
|
|
key_initpara.key_3_low = tdes_key[5];
|
|
/* key initialization */
|
|
cau_key_init(&key_initpara);
|
|
|
|
/* initialize the CAU peripheral */
|
|
cau_init(mode, CAU_MODE_TDES_ECB, CAU_SWAPPING_32BIT);
|
|
/* flush the IN and OUT FIFOs */
|
|
cau_fifo_flush();
|
|
cau_enable();
|
|
|
|
/* enable the CAU DMA interface */
|
|
cau_dma_enable(CAU_DMA_INFIFO | CAU_DMA_OUTFIFO);
|
|
|
|
/* DMA configuration */
|
|
dma_deinit(DMA1, DMA_CH5);
|
|
dma_deinit(DMA1, DMA_CH6);
|
|
dma_single_data_para_struct_init(&dma_initpara);
|
|
|
|
/* DMA1 channel6 for CAU_IN configuration */
|
|
dma_initpara.direction = DMA_MEMORY_TO_PERIPH;
|
|
dma_initpara.memory0_addr = (uint32_t)source;
|
|
dma_initpara.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
|
|
dma_initpara.periph_memory_width = DMA_PERIPH_WIDTH_32BIT;
|
|
dma_initpara.circular_mode = DMA_CIRCULAR_MODE_DISABLE;
|
|
dma_initpara.number = DATA_SIZE;
|
|
dma_initpara.periph_addr = (uint32_t)(&CAU_DI);
|
|
dma_initpara.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
|
|
dma_initpara.priority = DMA_PRIORITY_HIGH;
|
|
dma_single_data_mode_init(DMA1, DMA_CH6, &dma_initpara);
|
|
|
|
dma_channel_subperipheral_select(DMA1, DMA_CH6, DMA_SUBPERI2);
|
|
|
|
/* DMA1 channel5 for CAU_OUT configuration */
|
|
dma_initpara.direction = DMA_PERIPH_TO_MEMORY;
|
|
dma_initpara.memory0_addr = (uint32_t)dest;
|
|
dma_initpara.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
|
|
dma_initpara.periph_memory_width = DMA_PERIPH_WIDTH_32BIT;
|
|
dma_initpara.circular_mode = DMA_CIRCULAR_MODE_DISABLE;
|
|
dma_initpara.number = DATA_SIZE;
|
|
dma_initpara.periph_addr = (uint32_t)(&CAU_DO);
|
|
dma_initpara.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
|
|
dma_initpara.priority = DMA_PRIORITY_HIGH;
|
|
dma_single_data_mode_init(DMA1, DMA_CH5, &dma_initpara);
|
|
|
|
dma_channel_subperipheral_select(DMA1, DMA_CH5, DMA_SUBPERI2);
|
|
|
|
/* enable DMA transfer */
|
|
dma_channel_enable(DMA1, DMA_CH5);
|
|
dma_channel_enable(DMA1, DMA_CH6);
|
|
|
|
/* wait until the last transfer from OUT FIFO */
|
|
while(!dma_flag_get(DMA1, DMA_CH5, DMA_FLAG_FTF)){
|
|
}
|
|
|
|
dma_flag_clear(DMA1, DMA_CH5, DMA_FLAG_FTF);
|
|
dma_flag_clear(DMA1, DMA_CH6, DMA_FLAG_FTF);
|
|
|
|
cau_disable();
|
|
cau_dma_disable(CAU_DMA_INFIFO | CAU_DMA_OUTFIFO);
|
|
dma_channel_disable(DMA1, DMA_CH5);
|
|
dma_channel_disable(DMA1, DMA_CH6);
|
|
}
|
|
|
|
/*!
|
|
\brief printf data by a block of 8 bytes
|
|
\param[in] datalength: length of the data to display
|
|
\param[in] data: pointer to the data to display
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
static void data_display(uint32_t datalength, uint32_t *data)
|
|
{
|
|
uint32_t i =0, count = 0;
|
|
|
|
for(i = 0; i < datalength; i++){
|
|
printf("0x%08X ", data[i]);
|
|
count++;
|
|
|
|
if(2 == count){
|
|
count = 0;
|
|
printf(" [Block %d] \r\n", (i/2));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* retarget the C library printf function to the USART */
|
|
int fputc(int ch, FILE *f)
|
|
{
|
|
usart_data_transmit(EVAL_COM0, (uint8_t)ch);
|
|
while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE));
|
|
|
|
return ch;
|
|
}
|