[flagpol]

Hello, I encountered a problem using avbtool to extract the public key.

It sent this traceback after using this command:

Code:

python avbtool extract_public_key --key rsa4096_vbmeta.pem --output Keys/signing.bin

Code:

Traceback (most recent call last):
  File "avbtool", line 4154, in <module>
    tool.run(sys.argv)
  File "avbtool", line 4004, in run
    args.func(args)
  File "avbtool", line 4015, in extract_public_key
    self.avb.extract_public_key(args.key, args.output)
  File "avbtool", line 2697, in extract_public_key
    output.write(encode_rsa_key(key_path))
  File "avbtool", line 406, in encode_rsa_key
    key = RSAPublicKey(key_path)
  File "avbtool", line 368, in __init__
    stderr=subprocess.PIPE)
  File "C:\Python27\lib\subprocess.py", line 394, in __init__
    errread, errwrite)
  File "C:\Python27\lib\subprocess.py", line 644, in _execute_child
    startupinfo)
WindowsError: [Error 2] The system cannot find the file specified

What seems to be the problem? I have complete files, used avbtool successfully when I got the public keys for the chain partitions.

[flagpol]

Device is a Cherry Mobile Flare J3S with a SPD SP7731E chipset.

[X3non]

Hello, I encountered a problem using avbtool to extract the public key.
...
What seems to be the problem? I have complete files, used avbtool successfully when I got the public keys for the chain partitions.

which python version do you have installed? 2.7.10?

[flagpol]

I think I installed the latest 2.7 Python for Windows. But all is well now, booted into Linux and ran the tools again. Worked fine with a handy chmod 777 command, I recall.

[hovatek]

I think I installed the latest 2.7 Python for Windows. But all is well now, booted into Linux and ran the tools again. Worked fine with a handy chmod 777 command, I recall.

Linux is the way to go as you've observed

[X3non]

I think I installed the latest 2.7 Python for Windows. But all is well now, booted into Linux and ran the tools again. Worked fine with a handy chmod 777 command, I recall.

i have python 2.7.10 (not sure if 32 or 64 bits version is active because both are listed in my list of installed programs)
running same command as you did without errors