/* * dfu.c * ------------ * Receive new firmware from MGMT UART and write it to STM32 internal flash. * * Copyright (c) 2016, NORDUnet A/S All rights reserved. * * 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 NORDUnet 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. */ /* Rename both CMSIS HAL_OK and libhal HAL_OK to disambiguate */ #define HAL_OK CMSIS_HAL_OK #include "dfu.h" #include "stm-led.h" #include "stm-uart.h" #include "stm-flash.h" #undef HAL_OK #define HAL_OK LIBHAL_OK #include "hal.h" #undef HAL_OK #include extern uint32_t update_crc(uint32_t crc, uint8_t *buf, int len); static int getline(char *buf, int len) { int i; uint8_t c; for (i = 0; i < len; ++i) { if (uart_recv_char2(STM_UART_MGMT, &c, HAL_MAX_DELAY) != CMSIS_HAL_OK) return -1; if (c == '\r') { buf[i] = '\0'; break; } buf[i] = c; } return i; } static void uart_flush(void) { uint8_t c; while (uart_recv_char2(STM_UART_MGMT, &c, 0) == CMSIS_HAL_OK) { ; } } static int do_login(void) { char username[8]; char pin[hal_rpc_max_pin_length]; hal_client_handle_t client = { -1 }; hal_user_t user; int n; uart_flush(); uart_send_string2(STM_UART_MGMT, "\r\nUsername: "); if (getline(username, sizeof(username)) <= 0) return -1; 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; uart_flush(); uart_send_string2(STM_UART_MGMT, "\r\nPassword: "); if ((n = getline(pin, sizeof(pin))) <= 0) return -1; uart_flush(); if (hal_rpc_login(client, user, pin, n) != LIBHAL_OK) { uart_send_string2(STM_UART_MGMT, "\r\nAccess denied\r\n"); return -1; } return 0; } int dfu_receive_firmware(void) { uint32_t filesize = 0, crc = 0, my_crc = 0, counter = 0; uint32_t offset = DFU_FIRMWARE_ADDR, n = DFU_UPLOAD_CHUNK_SIZE; uint8_t buf[DFU_UPLOAD_CHUNK_SIZE]; if (do_login() != 0) return -1; /* Fake the CLI */ uart_send_string2(STM_UART_MGMT, "\r\ncryptech> "); char cmd[64]; if (getline(cmd, sizeof(cmd)) <= 0) return -1; if (strcmp(cmd, "firmware upload") != 0) { uart_send_string2(STM_UART_MGMT, "\r\nInvalid command \""); uart_send_string2(STM_UART_MGMT, cmd); uart_send_string2(STM_UART_MGMT, "\"\r\n"); return -1; } uart_send_string2(STM_UART_MGMT, "OK, write size (4 bytes), data in 4096 byte chunks, CRC-32 (4 bytes)\r\n"); /* Read file size (4 bytes) */ uart_receive_bytes(STM_UART_MGMT, (void *) &filesize, 4, 10000); if (filesize < 512 || filesize > DFU_FIRMWARE_END_ADDR - DFU_FIRMWARE_ADDR) { uart_send_string2(STM_UART_MGMT, "Invalid filesize "); uart_send_number2(STM_UART_MGMT, filesize, 1, 10); uart_send_string2(STM_UART_MGMT, "\r\n"); return -1; } HAL_FLASH_Unlock(); uart_send_string2(STM_UART_MGMT, "Send "); uart_send_number2(STM_UART_MGMT, filesize, 1, 10); uart_send_string2(STM_UART_MGMT, " bytes of data\r\n"); 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 the memory. */ memset(buf, 0xff, sizeof(buf)); if (filesize < n) { n = filesize; } if (uart_receive_bytes(STM_UART_MGMT, (void *) buf, n, 10000) != CMSIS_HAL_OK) { return -2; } filesize -= n; /* After reception of a chunk but before ACKing we have "all" the time in the world to * calculate CRC and write it to flash. */ my_crc = update_crc(my_crc, buf, n); stm_flash_write32(offset, (uint32_t *)buf, sizeof(buf)/4); offset += DFU_UPLOAD_CHUNK_SIZE; /* ACK this chunk by sending the current chunk counter (4 bytes) */ counter++; uart_send_bytes(STM_UART_MGMT, (void *) &counter, 4); led_toggle(LED_BLUE); } HAL_FLASH_Lock(); uart_send_string2(STM_UART_MGMT, "Send CRC-32\r\n"); /* The sending side will now send its calculated CRC-32 */ uart_receive_bytes(STM_UART_MGMT, (void *) &crc, 4, 10000); uart_send_string2(STM_UART_MGMT, "CRC-32 0x"); uart_send_number2(STM_UART_MGMT, crc, 1, 16); uart_send_string2(STM_UART_MGMT, ", calculated CRC 0x"); uart_send_number2(STM_UART_MGMT, my_crc, 1, 16); if (crc == my_crc) { uart_send_string2(STM_UART_MGMT, "CRC checksum MATCHED\r\n"); return 0; } else { uart_send_string2(STM_UART_MGMT, "CRC checksum did NOT match\r\n"); } led_on(LED_RED); led_on(LED_YELLOW); /* Better to erase the known bad firmware */ stm_flash_erase_sectors(DFU_FIRMWARE_ADDR, DFU_FIRMWARE_END_ADDR); led_off(LED_YELLOW); return 0; } 03'>103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161