dn.py 文件源码

def TraverseRdn(rdn):
    """Traverses RDN structure and returns string encoding of the DN.

    Args:
      rdn: ASN.1 SET (or SEQUENCE) containing RDNs (relative distinguished
           names), as identified by type / value pairs. A typical input would
          be of type X.509 RelativeDistinguishedName.

    Returns:
      A dict representing the Distinguished Name.
    """
    val = dict()
    for n in rdn:
      # Note that this does not work for e.g. DC which is present
      # multiple times.
      # For a real DN parser, make sure to follow the spec in regards
      # to multiple occurence of a field in subsequent RDNs, maintaining
      # original ordering etc.
      # TODO(user): What about elements other than [0]??
      name = DistinguishedName.OidToName(n[0]['type'])
      value = decoder.decode(n[0]['value'])
      if name in val:
        val[name] = str(value[0]) + ', ' + val.get(name, '')
      else:
        val[name] = str(value[0])
    return val