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91 lines
1.7 KiB
91 lines
1.7 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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#include "libc.h"
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#include "provision.h"
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#include "drivers/drivers.h"
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#include "drivers/llgpio.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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int puts(const char *a) { return 0; }
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void puth(unsigned int i) {}
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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() {
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early();
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}
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void fail() {
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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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int main() {
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__disable_irq();
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clock_init();
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detect();
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if (revision == PANDA_REV_C) {
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set_usb_power_mode(USB_POWER_CLIENT);
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}
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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(*)()) _app_start[1])();
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return 0;
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}
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