Generating signing key for Secure Boot V2 throws an error (IDFGH-3887)

[achraf-boussaada]

Environment

• Development Kit: none
• Module or chip used: ESP32-WROOM-32E
• IDF version : ESP-IDF v4.3-dev-907-g6c17e3a64
• Build System: idf.py
• Compiler version : (crosstool-NG esp-2020r2) 8.2.0
• Operating System: Linux
• Using an IDE?: yes, visual code studio
• Power Supply: USB

Problem Description

the problem here is simple and straightforward, executing:

espsecure.py generate_signing_key secure_boot_signing_key.pem --version 2

throws the following error:

espsecure.py v3.0-dev
Traceback (most recent call last):
  File "/workspace/esp/esp-idf/components/esptool_py/esptool/espsecure.py", line 826, in <module>
    _main()
  File "/workspace/esp/esp-idf/components/esptool_py/esptool/espsecure.py", line 819, in _main
    main()
  File "/workspace/esp/esp-idf/components/esptool_py/esptool/espsecure.py", line 814, in main
    operation_func(args)
  File "/workspace/esp/esp-idf/components/esptool_py/esptool/espsecure.py", line 161, in generate_signing_key
    f.write(private_key)
TypeError: a bytes-like object is required, not 'str'

NOTES:

• Executing the same command with the --version 1 flag works without a problem

• Despite throwing an error with --version 2, the file was created but with 0 bytes as size.

[hashyaha]

I changed f.write(private_key) into f.write(private_key.encode()) in line 161 of file espsecure.py and it works.

[KonstantinKondrashov]

Hi @achraf-boussaada @hashyaha .This issue occurs under python3, but pytnon2 works well. We will fix this.

[KonstantinKondrashov]

The fix is already in the master of esptool repo but was not updated in ESP-IDF. espressif/esptool@c67e079. We will update it ASAP.

[Alvin1Zhang]

Thanks for reporting, and sorry for slow turnaround. The fix is available at 46b3a6d. Feel free to reopen.

[pedros89]

Hi @achraf-boussaada @hashyaha .This issue occurs under python3, but pytnon2 works well. We will fix this.

Hello, yes use python2 to always launch espsecure.py
You will have to install some modules, it is all exmplained here