hashflash.h

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#ifndef UTILS_HASH_FLASH_H
#define UTILS_HASH_FLASH_H
 
#include "utils/dcp.h" // utils::hash_sha256
#include <ArduinoJson.h>
#include <array>
#include <cstdio> // sprintf
#include <string>
 
// defined in the Teensy default linker script imxrt1062_t41.ld
extern unsigned long _flashimagelen;
// typically hardcoded everywhere, but see also the linker script.
constexpr unsigned long flash_origin = 0x60000000;
 
namespace loader {
 
struct flashimage {
  static uint32_t len() { return (uint32_t)&_flashimagelen; };
 
  static utils::sha256 sha256sum() {
    auto *flash = (const uint8_t *)flash_origin;
    return utils::sha256(flash, len());
    // sha256_t checksum;
    // utils::hash_sha256(flash, flashimagelen(), checksum.data());
    // return checksum;
  };
 
  static void toJson(JsonVariant target) {
    target["size"] = len();
    target["sha256sum"] = sha256sum().to_string();
  }
};
 
inline void convertToJson(const flashimage &src, JsonVariant info) { src.toJson(info); }
 
} // namespace loader
 
#endif /* UTILS_HASH_FLASH_H */