auth_data.py 文件源码

def _ParseCountersig(self, unauth_attrs):
    attr = unauth_attrs[0]
    if oids.OID_TO_CLASS.get(attr['type']) is not pkcs7.CountersignInfo:
      raise Asn1Error('Unexpected countersign OID.')
    values = attr['values']
    if len(values) != 1:
      raise Asn1Error('Expected one CS value, got %d.' % len(values))
    counter_sig_info, rest = decoder.decode(values[0],
                                            asn1Spec=pkcs7.CountersignInfo())
    if rest: raise Asn1Error('Extra unparsed content.')
    return counter_sig_info