/*
* mgmt-cli.c
* ---------
* Management CLI code.
*
* Copyright (c) 2016-2017, 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.
*/
#include <string.h>
/* Rename both CMSIS HAL_OK and libhal HAL_OK to disambiguate */
#define HAL_OK CMSIS_HAL_OK
#include "stm-init.h"
#include "stm-uart.h"
#include "stm-led.h"
#include "task.h"
#include "mgmt-cli.h"
#include "mgmt-firmware.h"
#include "mgmt-bootloader.h"
#include "mgmt-fpga.h"
#include "mgmt-misc.h"
#include "mgmt-keystore.h"
#include "mgmt-masterkey.h"
#include "mgmt-task.h"
#include "mgmt-timing.h"
#undef HAL_OK
#define HAL_OK LIBHAL_OK
#include "hal.h"
#warning Refactor so we do not need to include hal_internal.h here
#include "hal_internal.h"
#undef HAL_OK
static tcb_t *cli_task;
#ifndef CLI_UART_RECVBUF_SIZE
#define CLI_UART_RECVBUF_SIZE 256
#endif
typedef struct {
unsigned ridx;
unsigned widx;
mgmt_cli_dma_state_t rx_state;
uint8_t buf[CLI_UART_RECVBUF_SIZE];
} ringbuf_t;
inline void ringbuf_init(ringbuf_t *rb)
{
memset(rb, 0, sizeof(*rb));
}
/* return number of characters read */
inline int ringbuf_read_char(ringbuf_t *rb, uint8_t *c)
{
if (rb->ridx != rb->widx) {
*c = rb->buf[rb->ridx];
if (++rb->ridx >= sizeof(rb->buf))
rb->ridx = 0;
return 1;
}
return 0;
}
inline void ringbuf_write_char(ringbuf_t *rb, uint8_t c)
{
rb->buf[rb->widx] = c;
if (++rb->widx >= sizeof(rb->buf))
rb->widx = 0;
}
static ringbuf_t uart_ringbuf;
/* current character received from UART */
static uint8_t uart_rx;
/* Callback for HAL_UART_Receive_DMA().
*/
void HAL_UART1_RxCpltCallback(UART_HandleTypeDef *huart)
{
huart = huart;
ringbuf_write_char(&uart_ringbuf, uart_rx);
task_wake(cli_task);
}
static void uart_cli_print(struct cli_def *cli __attribute__ ((unused)), const char *buf)
{
char crlf[] = "\r\n";
uart_send_string(buf);
uart_send_string(crlf);
}
static ssize_t uart_cli_read(struct cli_def *cli __attribute__ ((unused)), void *buf, size_t count)
{
for (size_t i = 0; i < count; ++i) {
while (ringbuf_read_char(&uart_ringbuf, (uint8_t *)(buf + i)) == 0)
task_sleep();
}
return (ssize_t)count;
}
static ssize_t uart_cli_write(struct cli_def *cli __attribute__ ((unused)), const void *buf, size_t count)
{
uart_send_bytes((uint8_t *) buf, count);
return (ssize_t)count;
}
int control_mgmt_uart_dma_rx(mgmt_cli_dma_state_t state)
{
if (state == DMA_RX_START) {
if (uart_ringbuf.rx_state != DMA_RX_START) {
ringbuf_init(&uart_ringbuf);
HAL_UART_Receive_DMA(&huart_mgmt, &uart_rx, 1);
uart_ringbuf.rx_state = DMA_RX_START;
}
return 1;
} else if (state == DMA_RX_STOP) {
if (HAL_UART_DMAStop(&huart_mgmt) != CMSIS_HAL_OK) return 0;
uart_ringbuf.rx_state = DMA_RX_STOP;
return 1;
}
return 0;
}
hal_user_t user;
static int check_auth(const char *username, const char *password)
{
hal_client_handle_t client = { -1 };
/* PIN-based login */
if (strcmp(username, "wheel") == 0)
user = HAL_USER_WHEEL;
else if (strcmp(username, "so") == 0)
user = HAL_USER_SO;
else if (strcmp(username, "user") == 0)
user = HAL_USER_NORMAL;
else
user = HAL_USER_NONE;
if (hal_rpc_login(client, user, password, strlen(password)) == LIBHAL_OK)
return CLI_OK;
user = HAL_USER_NONE;
return CLI_ERROR;
}
int cli_main(void)
{
cli_task = task_get_tcb();
struct cli_def *cli;
cli = cli_init();
if (cli == NULL)
Error_Handler();
cli_read_callback(cli, uart_cli_read);
cli_write_callback(cli, uart_cli_write);
cli_print_callback(cli, uart_cli_print);
cli_set_banner(cli, "Cryptech Alpha");
cli_set_hostname(cli, "cryptech");
cli_set_auth_callback(cli, check_auth);
/* we don't have any privileged commands at the moment */
cli_unregister_command(cli, "enable");
configure_cli_fpga(cli);
configure_cli_keystore(cli);
configure_cli_masterkey(cli);
configure_cli_firmware(cli);
configure_cli_bootloader(cli);
configure_cli_misc(cli);
configure_cli_task(cli);
configure_cli_timing(cli);
while (1) {
control_mgmt_uart_dma_rx(DMA_RX_START);
cli_loop(cli, 0);
/* cli_loop returns when the user enters 'quit' or 'exit' */
cli_print(cli, "\nLogging out...\n");
user = HAL_USER_NONE;
}
/*NOTREACHED*/
return -1;
}
