1#!/usr/bin/python 2# Copyright (C) Internet Systems Consortium, Inc. ("ISC") 3# 4# This Source Code Form is subject to the terms of the Mozilla Public 5# License, v. 2.0. If a copy of the MPL was not distributed with this 6# file, You can obtain one at http://mozilla.org/MPL/2.0/. 7# 8# See the COPYRIGHT file distributed with this work for additional 9# information regarding copyright ownership. 10 11# catzhash.py: generate the SHA-1 hash of a domain name in wire format. 12# 13# This can be used to determine the label to use in a catalog zone to 14# represent the specified zone. For example, the zone 15# "domain.example" can be represented in a catalog zone called 16# "catalog.example" by adding the following record: 17# 18# 5960775ba382e7a4e09263fc06e7c00569b6a05c.zones.catalog.example. \ 19# IN PTR domain.example. 20# 21# The label "5960775ba382e7a4e09263fc06e7c00569b6a05c" is the output of 22# this script when run with the argument "domain.example". 23 24import sys 25import hashlib 26import dns.name 27 28if len(sys.argv) < 2: 29 print("Usage: %s name" % sys.argv[0]) 30 31NAME = dns.name.from_text(sys.argv[1]).to_wire() 32print(hashlib.sha1(NAME).hexdigest()) 33