when upload private.pem get error "Invalid Private key file or Public key not included."

[kevinkxqr]

I generate the pem file as instruction:

openssl req -x509 -newkey rsa:2048 -sha256 -keyout private.pem -out public.pem -days 365

cat public.pem >> private.pem

when I use the private.pem in Add private key page got an error

Invalid Private key file or Public key not included.

the error happened in as2.py ` def load_key(key_str: bytes, key_pass: str): """Function to load password protected key file in p12 or pem format."""

    try:
        # First try to parse as a p12 file
        key, cert, _ = asymmetric.load_pkcs12(key_str, key_pass)
    except ValueError as e:    **#'Error parsing asn1crypto.pkcs12.Pfx - tag should have been 16, but 13 was found'**  _I don't understand this error means_
        # If it fails due to invalid password raise error here
        if e.args[0] == "Password provided is invalid":     
            raise AS2Exception("Password not valid for Private Key.") from e

        # if not try to parse as a pem file
        key, cert = None, None
        for kc in split_pem(key_str):
            try:
                cert = asymmetric.load_certificate(kc)
            except (ValueError, TypeError) as e:
                try:
                    key = asymmetric.load_private_key(kc, key_pass)
                except OSError:
                    raise AS2Exception(
                        "Invalid Private Key or password is not correct."
                    ) from e

    if not key or not cert:
        raise AS2Exception("Invalid Private key file or Public key not included.")

    return key, cert

` the cert is always None, is there anything I make wrong?

Thank you

[kevinkxqr]

the .pem file should include private key and certificate, public key is not necessary