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[F24:CRYPTO] Add example using cryptographic module on F41x or F2x

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This commit is contained in:
Frantisek Burian
2013-12-15 21:47:56 +01:00
committed by Piotr Esden-Tempski
parent d8757ab1fc
commit 314ad2d877
4 changed files with 188 additions and 0 deletions
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25
examples/stm32/f4/other/crypto-basic/Makefile Normal file
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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This library is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with this library. If not, see <http://www.gnu.org/licenses/>.
##
BINARY = cryptobasic
LDSCRIPT = ../stm32f4-discovery.ld
include ../../Makefile.include

6
examples/stm32/f4/other/crypto-basic/README Normal file
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------------------------------------------------------------------------------
README
------------------------------------------------------------------------------
This example program is for demonstrating of use Crypto Controller on STM32F417
board.

125
examples/stm32/f4/other/crypto-basic/cryptobasic.c Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/usart.h>
#include <libopencm3/stm32/crypto.h>
static void clock_setup(void)
{
/* Enable GPIOD clock for LED & USARTs. */
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN);
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN);
/* Enable clocks for USART2. */
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
/* Enable clocks for CRYP. */
rcc_peripheral_enable_clock(&RCC_AHB2ENR, RCC_AHB2ENR_CRYPEN);
}
static void usart_setup(void)
{
/* Setup USART2 parameters. */
usart_set_baudrate(USART2, 38400);
usart_set_databits(USART2, 8);
usart_set_stopbits(USART2, USART_STOPBITS_1);
usart_set_mode(USART2, USART_MODE_TX);
usart_set_parity(USART2, USART_PARITY_NONE);
usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
/* Finally enable the USART. */
usart_enable(USART2);
}
static void gpio_setup(void)
{
/* Setup GPIO pin GPIO12 on GPIO port D for LED. */
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO12);
/* Setup GPIO pins for USART2 transmit. */
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2);
/* Setup USART2 TX pin as alternate function. */
gpio_set_af(GPIOA, GPIO_AF7, GPIO2);
}
static uint64_t key[4] = {0x11223344,0x44556677,0x77889900, 0x99005522};
static uint64_t iv[4] = {0x01020304,0x02030405,0x09080706, 0x55245711};
static uint8_t plaintext[8] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
static uint8_t ciphertext[8] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
static uint8_t plaintext2[8] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
int main(void)
{
int i;
int iserr = 1;
clock_setup();
gpio_setup();
usart_setup();
/* Blink the LED (PD12) on the board with every transmitted byte. */
while (1) {
gpio_toggle(GPIOD, GPIO12); /* LED on/off */
/* encode the plaintext message into ciphertext */
crypto_set_key(CRYPTO_KEY_128BIT,key);
crypto_set_iv(iv); /* only in CBC or CTR mode */
crypto_set_datatype(CRYPTO_DATA_32BIT);
crypto_set_algorithm(ENCRYPT_DES_ECB);
crypto_start();
crypto_process_block((uint32_t*)plaintext,
(uint32_t*)ciphertext,
8 / sizeof(uint32_t));
crypto_stop();
/* decode the previously encoded message
from ciphertext to plaintext2 */
crypto_set_key(CRYPTO_KEY_128BIT,key);
crypto_set_iv(iv); /* only in CBC or CTR mode */
crypto_set_datatype(CRYPTO_DATA_32BIT);
crypto_set_algorithm(DECRYPT_DES_ECB);
crypto_start();
crypto_process_block((uint32_t*)ciphertext,
(uint32_t*)plaintext2,
8 / sizeof(uint32_t));
crypto_stop();
/* compare the two plaintexts if they are same */
iserr = 0;
for (i=0; i<8; i++)
{
if (plaintext[i] != plaintext2[i])
iserr = true;
}
if (iserr)
gpio_toggle(GPIOD,GPIO12); /* something went wrong. */
}
return 0;
}

32
examples/stm32/f4/other/stm32f4-discovery.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2011 Stephen Caudle <scaudle@doceme.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for ST STM32F4DISCOVERY (STM32F407VG, 1024K flash, 128K RAM). */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 1024K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 128K
}
/* Include the common ld script. */
INCLUDE libopencm3_stm32f4.ld