'Parse basic authentication over HTTP'

def parse_basic_auth(self, src_ip_port, dst_ip_port, headers, authorization_header):

    if authorization_header:
        try:
            header_val = headers[authorization_header.group()]
        except KeyError:
            return
        b64_auth_re = re.match('basic    (.+)', header_val, re.IGNORECASE)
        if (b64_auth_re != None):
            basic_auth_b64 = b64_auth_re.group(1)
            basic_auth_creds = base64.decodestring(basic_auth_b64)
            msg = ('Basic    Authentication:    %s' % basic_auth_creds)
            self.printer(src_ip_port, dst_ip_port, msg)
