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106 lines
2.4 KiB
106 lines
2.4 KiB
#define BOOTSTUB
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#include "config.h"
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#include "obj/gitversion.h"
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#ifdef STM32F4
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#define PANDA
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#include "stm32f4xx.h"
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#include "stm32f4xx_hal_gpio_ex.h"
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#else
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#include "stm32f2xx.h"
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#include "stm32f2xx_hal_gpio_ex.h"
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#endif
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// ******************** Prototypes ********************
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void puts(const char *a){ UNUSED(a); }
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void puth(unsigned int i){ UNUSED(i); }
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void puth2(unsigned int i){ UNUSED(i); }
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typedef struct board board;
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typedef struct harness_configuration harness_configuration;
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// No CAN support on bootloader
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void can_flip_buses(uint8_t bus1, uint8_t bus2){UNUSED(bus1); UNUSED(bus2);}
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void can_set_obd(int harness_orientation, bool obd){UNUSED(harness_orientation); UNUSED(obd);}
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// ********************* Globals **********************
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int hw_type = 0;
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const board *current_board;
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// ********************* Includes *********************
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#include "libc.h"
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#include "provision.h"
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#include "drivers/clock.h"
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#include "drivers/llgpio.h"
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#include "drivers/adc.h"
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#include "board.h"
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#include "gpio.h"
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#include "drivers/spi.h"
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#include "drivers/usb.h"
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//#include "drivers/uart.h"
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#include "crypto/rsa.h"
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#include "crypto/sha.h"
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#include "obj/cert.h"
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#include "spi_flasher.h"
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void __initialize_hardware_early(void) {
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early();
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}
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void fail(void) {
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soft_flasher_start();
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}
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// know where to sig check
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extern void *_app_start[];
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// FIXME: sometimes your panda will fail flashing and will quickly blink a single Green LED
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// BOUNTY: $200 coupon on shop.comma.ai or $100 check.
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int main(void) {
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disable_interrupts();
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clock_init();
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detect_configuration();
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detect_board_type();
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if (enter_bootloader_mode == ENTER_SOFTLOADER_MAGIC) {
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enter_bootloader_mode = 0;
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soft_flasher_start();
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}
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// validate length
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int len = (int)_app_start[0];
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if ((len < 8) || (len > (0x1000000 - 0x4000 - 4 - RSANUMBYTES))) goto fail;
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// compute SHA hash
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uint8_t digest[SHA_DIGEST_SIZE];
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SHA_hash(&_app_start[1], len-4, digest);
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// verify RSA signature
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if (RSA_verify(&release_rsa_key, ((void*)&_app_start[0]) + len, RSANUMBYTES, digest, SHA_DIGEST_SIZE)) {
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goto good;
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}
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// allow debug if built from source
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#ifdef ALLOW_DEBUG
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if (RSA_verify(&debug_rsa_key, ((void*)&_app_start[0]) + len, RSANUMBYTES, digest, SHA_DIGEST_SIZE)) {
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goto good;
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}
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#endif
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// here is a failure
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fail:
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fail();
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return 0;
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good:
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// jump to flash
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((void(*)(void)) _app_start[1])();
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return 0;
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}
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