'alert when a cert is using sha1 for the hashing part of
its signature algorithm.
Microsoft and Google are aiming to drop support for sha1 by January 2017.'

def check_signature_algorith_for_sha1(self, cert_item):

    sig_alg = cert_item.config.get('signature_algorithm', None)
    if (sig_alg and ('sha1' in sig_alg.lower())):
        self.add_issue(1, 'Cert    uses    an    SHA1    signature    Algorithm', cert_item, notes=sig_alg)
