/* * 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; } ' href='#n89'>89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365