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Add pico_serial_hash as a source of unique (almost) 32 bytes string.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
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Pol Henarejos 2025-10-07 21:11:06 +02:00
parent df94d10f8f
commit 031d76737b
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GPG key ID: C0095B7870A4CCD3
2 changed files with 5 additions and 0 deletions
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4
src/main.c
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@ -43,6 +43,8 @@
#include "random.h"
#include "apdu.h"
#include "usb.h"
#include "mbedtls/sha256.h"
extern void do_flash();
extern void low_flash_init();
extern void init_otp_files();
@ -289,6 +291,7 @@ void core0_loop() {
}
char pico_serial_str[2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1];
uint8_t pico_serial_hash[32];
pico_unique_board_id_t pico_serial;
#ifdef ESP_PLATFORM
#define pico_get_unique_board_id(a) do { uint32_t value; esp_efuse_read_block(EFUSE_BLK1, &value, 0, 32); memcpy((uint8_t *)(a), &value, sizeof(uint32_t)); esp_efuse_read_block(EFUSE_BLK1, &value, 32, 32); memcpy((uint8_t *)(a)+4, &value, sizeof(uint32_t)); } while(0)
@ -307,6 +310,7 @@ int main(void) {
for (int i = 0; i < sizeof(pico_serial); i++) {
snprintf(&pico_serial_str[2 * i], 3, "%02X", pico_serial.id[i]);
}
mbedtls_sha256(pico_serial.id, sizeof(pico_serial.id), pico_serial_hash, false);
#ifndef ENABLE_EMULATION
#ifdef PICO_PLATFORM

1
src/pico_keys.h
View file

@ -235,5 +235,6 @@ typedef struct { uint8_t id[PICO_UNIQUE_BOARD_ID_SIZE_BYTES]; } pico_unique_boar
#endif
extern pico_unique_board_id_t pico_serial;
extern char pico_serial_str[2 * PICO_UNIQUE_BOARD_ID_SIZE_BYTES + 1];
extern uint8_t pico_serial_hash[32];
#endif