def _get_config_value(profile, config_name):
    '''
    Helper function that returns a profile's configuration value based on
    the supplied configuration name.

    profile
        The profile name that contains configuration information.

    config_name
        The configuration item's name to use to return configuration values.
    '''
    config = __salt__['config.option'](profile)
    if not config:
        raise CommandExecutionError(
            'Authentication information could not be found for the '
            '\'{0}\' profile.'.format(profile)
        )

    config_value = config.get(config_name)
    if config_value is None:
        raise CommandExecutionError(
            'The \'{0}\' parameter was not found in the \'{1}\' '
            'profile.'.format(
                config_name,
                profile
            )
        )

    return config_value