Re: PYro4 v4.17 and HMAC_KEY error: hmac key config not symmetric

On 21-2-2013 9:57, Aurelio Forese wrote:
> I'm using Pyro4 v4.17 and I've some problems setting HMAC_KEY for
> authentication.
> To be more specific, whatever Pyro4.config.HMAC_KEY I set, running the
> server code, I always receive the error:
> "Pyro4.errors.comunicationError: cannot connect: hmac key config not
> symmetric".
> Note that my server Pyro4 code works normally if I comment the
> HMAC_KEY setting and I can connect through a client. Nameserver
> service is correctly running.
> I tried to set Pyro4.config.HMAC_KEY both with a string or HMAC object
> but same result.


Please provide the full traceback. (where exactly is your server code failing?) Is it
failing directly when starting the server, or when a client tries to connect?

Also, how do you start the name service?  If you configure a HMAC_KEY for your pyro
server, you'll also need to configure the same key for the name service. It should not
show the warning "UserWarning: HMAC_KEY not set, protocol data may not be secure".

Are you using the same Python version 'on both sides'?

By the way, HMAC_KEY should be a regular string (or bytes type for Python3), not a HMAC
object.


Cheers

Irmen de Jong


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