auth_data.py 文件源码

def _ParseAuthAttrs(self, auth_attrs, required):
    results = dict.fromkeys(required)
    for attr in auth_attrs:
      if (attr['type'] in oids.OID_TO_CLASS and
          oids.OID_TO_CLASS.get(attr['type']) in required):
        # There are more than those I require, but I don't know what they are,
        # and what to do with them. The spec does not talk about them.
        # One example:
        # 1.3.6.1.4.1.311.2.1.11 contains as value 1.3.6.1.4.1.311.2.1.21
        # SPC_STATEMENT_TYPE_OBJID    SPC_INDIVIDUAL_SP_KEY_PURPOSE_OBJID
        results[oids.OID_TO_CLASS.get(attr['type'])] = attr['values']
    if None in results.itervalues():
      raise Asn1Error('Missing mandatory field(s) in auth_attrs.')

    # making sure that the auth_attrs were processed in correct order
    # they need to be sorted in ascending order in the SET, when DER encoded
    # This also makes sure that the tag on Attributes is correct.
    a = [der_encoder.encode(i) for i in auth_attrs]
    a.sort()
    attrs_for_hash = pkcs7.Attributes()
    for i in range(len(auth_attrs)):
      d, _ = decoder.decode(a[i], asn1Spec=pkcs7.Attribute())
      attrs_for_hash.setComponentByPosition(i, d)
    encoded_attrs = der_encoder.encode(attrs_for_hash)

    return results, encoded_attrs