dfu-boot

Device Firmware Upgrade (DFU) compatible bootloader for STM32F1xxx family of microcontrollers.

Could run on other STM32 devices, currently not tested.

Features:

• DFU firmware download (to device) over USB
• WebUSB compatible
• Seamless boot into user code with an option to break into the bootloader at startup
• Flags stored in flash providing:
  • Authenticity of downloaded firmware
  • Magic value that prevents running user code if it's doesn't pass verification
  • Flash count
• Serial output for debugging over USART
• Based on Real-Time Interrupt-driven Concurrency (RTIC) framework for ARM Cortex-M microcontrollers

Planned features:

• Cryptographic signature verification of downloaded firmware
• Firmware tamper detection
• Software or hardware assisted crypto
• CRC or SHA firmware integrity test
• DFU upload of existing firmware (to host)