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/*
* mgmt-misc.c
* -----------
* Miscellaneous CLI functions.
*
* Copyright (c) 2016-2018, NORDUnet A/S All rights reserved.
* Copyright: 2020, The Commons Conservancy Cryptech Project
* SPDX-License-Identifier: BSD-3-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - 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.
*/
#define HAL_OK CMSIS_HAL_OK
#include "stm-init.h"
#include "stm-uart.h"
#include "mgmt-cli.h"
#include "mgmt-misc.h"
#undef HAL_OK
#define HAL_OK LIBHAL_OK
#include "hal.h"
#include "hal_internal.h"
#undef HAL_OK
#include <string.h>
int cli_receive_data(struct cli_def *cli, uint8_t *buf, size_t len, cli_data_callback data_callback)
{
hal_crc32_t crc = 0, my_crc = hal_crc32_init();
uint32_t filesize = 0, counter = 0;
size_t n = len;
if (! control_mgmt_uart_dma_rx(DMA_RX_STOP)) {
cli_print(cli, "Failed stopping DMA");
goto okay;
}
cli_print(cli, "OK, write size (4 bytes), data in %li byte chunks, CRC-32 (4 bytes)", (uint32_t) n);
if (uart_receive_bytes((void *) &filesize, sizeof(filesize), 2000) != CMSIS_HAL_OK) {
cli_print(cli, "Receive timed out");
goto fail;
}
cli_print(cli, "Send %li bytes of data", filesize);
while (filesize) {
/* By initializing buf to the same value that erased flash has (0xff), we don't
* have to try and be smart when writing the last page of data to a flash memory.
*/
memset(buf, 0xff, len);
if (filesize < n) n = filesize;
if (uart_receive_bytes((void *) buf, n, 2000) != CMSIS_HAL_OK) {
cli_print(cli, "Receive timed out");
goto fail;
}
filesize -= n;
my_crc = hal_crc32_update(my_crc, buf, n);
/* After reception of a chunk but before ACKing we have "all" the time in the world to
* calculate CRC and invoke the data_callback.
*/
if (data_callback != NULL && data_callback(buf, n) != CMSIS_HAL_OK) {
cli_print(cli, "Data processing failed");
goto okay;
}
counter++;
uart_send_bytes((void *) &counter, 4);
}
my_crc = hal_crc32_finalize(my_crc);
cli_print(cli, "Send CRC-32");
uart_receive_bytes((void *) &crc, sizeof(crc), 2000);
cli_print(cli, "CRC-32 0x%x, calculated CRC 0x%x", (unsigned int) crc, (unsigned int) my_crc);
if (crc == my_crc) {
cli_print(cli, "CRC checksum MATCHED");
} else {
cli_print(cli, "CRC checksum did NOT match");
}
okay:
control_mgmt_uart_dma_rx(DMA_RX_START);
return CLI_OK;
fail:
control_mgmt_uart_dma_rx(DMA_RX_START);
return CLI_ERROR;
}
#ifdef DO_PROFILING
static int cmd_profile_start(struct cli_def *cli, const char *command, char *argv[], int argc)
{
cli = cli;
command = command;
argv = argv;
argc = argc;
extern uint32_t CRYPTECH_FIRMWARE_START;
extern char __etext; /* end of text/code symbol, defined by linker */
extern void monstartup (size_t lowpc, size_t highpc);
monstartup((size_t)&CRYPTECH_FIRMWARE_START, (size_t)&__etext);
return CLI_OK;
}
static int cmd_profile_stop(struct cli_def *cli, const char *command, char *argv[], int argc)
{
cli = cli;
command = command;
argv = argv;
argc = argc;
extern void _mcleanup(void);
_mcleanup();
return CLI_OK;
}
#endif
static int cmd_reboot(struct cli_def *cli, const char *command, char *argv[], int argc)
{
command = command;
argv = argv;
argc = argc;
cli_print(cli, "\n\n\nRebooting\n\n\n");
HAL_NVIC_SystemReset();
/*NOTREACHED*/
return CLI_OK;
}
static int cmd_rsa_blinding(struct cli_def *cli, const char *command, char *argv[], int argc)
{
if (argc != 1) {
cli_print(cli, "Wrong number of arguments (%i).", argc);
cli_print(cli, "Syntax: %s <on|off|clear>", command);
return CLI_ERROR;
}
if (strcmp(argv[0], "on") == 0)
hal_rsa_set_blinding(1);
else if (strcmp(argv[0], "off") == 0)
hal_rsa_set_blinding(0);
else if (strcmp(argv[0], "clear") == 0)
hal_rsa_clear_blinding_cache();
else {
cli_print(cli, "Argument must be 'on', 'off', or 'clear' - not '%s'", argv[0]);
return CLI_ERROR;
}
return CLI_OK;
}
static int cmd_rsa_crt(struct cli_def *cli, const char *command, char *argv[], int argc)
{
int onoff;
if (argc != 1) {
cli_print(cli, "Wrong number of arguments (%i).", argc);
cli_print(cli, "Syntax: %s <on|off>", command);
return CLI_ERROR;
}
if (strcmp(argv[0], "on") == 0)
onoff = 1;
else if (strcmp(argv[0], "off") == 0)
onoff = 0;
else {
cli_print(cli, "Argument must be 'on' or 'off' - not '%s'", argv[0]);
return CLI_ERROR;
}
hal_rsa_set_crt(onoff);
return CLI_OK;
}
static int cmd_rsa_modexpng(struct cli_def *cli, const char *command, char *argv[], int argc)
{
int onoff;
if (argc != 1) {
cli_print(cli, "Wrong number of arguments (%i).", argc);
cli_print(cli, "Syntax: %s <on|off>", command);
return CLI_ERROR;
}
if (strcmp(argv[0], "on") == 0)
onoff = 1;
else if (strcmp(argv[0], "off") == 0)
onoff = 0;
else {
cli_print(cli, "Argument must be 'on' or 'off' - not '%s'", argv[0]);
return CLI_ERROR;
}
hal_error_t err;
if ((err = hal_modexp_use_modexpng(onoff)) == LIBHAL_OK)
return CLI_OK;
cli_print(cli, hal_error_string(err));
return CLI_ERROR;
}
void configure_cli_misc(struct cli_def *cli)
{
#ifdef DO_PROFILING
struct cli_command *c_profile = cli_register_command(cli, NULL, "profile", NULL, 0, 0, NULL);
/* profile start */
cli_register_command(cli, c_profile, "start", cmd_profile_start, 0, 0, "Start collecting profiling data");
/* profile stop */
cli_register_command(cli, c_profile, "stop", cmd_profile_stop, 0, 0, "Stop collecting profiling data");
#endif
struct cli_command *c_rsa = cli_register_command(cli, NULL, "rsa", NULL, 0, 0, NULL);
/* rsa blinding */
cli_register_command(cli, c_rsa, "blinding", cmd_rsa_blinding, 0, 0, "Set use of RSA blinding");
/* rsa crt */
cli_register_command(cli, c_rsa, "crt", cmd_rsa_crt, 0, 0, "Set use of RSA CRT");
/* rsa modexpng */
cli_register_command(cli, c_rsa, "modexpng", cmd_rsa_modexpng, 0, 0, "Set use of ModExpNG");
/* reboot */
cli_register_command(cli, NULL, "reboot", cmd_reboot, 0, 0, "Reboot the STM32");
}
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