1#!/usr/bin/python 2# Copyright (C) Internet Systems Consortium, Inc. ("ISC") 3# 4# SPDX-License-Identifier: MPL-2.0 5# 6# This Source Code Form is subject to the terms of the Mozilla Public 7# License, v. 2.0. If a copy of the MPL was not distributed with this 8# file, you can obtain one at https://mozilla.org/MPL/2.0/. 9# 10# See the COPYRIGHT file distributed with this work for additional 11# information regarding copyright ownership. 12 13# catzhash.py: generate the SHA-1 hash of a domain name in wire format. 14# 15# This can be used to determine the label to use in a catalog zone to 16# represent the specified zone. For example, the zone 17# "domain.example" can be represented in a catalog zone called 18# "catalog.example" by adding the following record: 19# 20# 5960775ba382e7a4e09263fc06e7c00569b6a05c.zones.catalog.example. \ 21# IN PTR domain.example. 22# 23# The label "5960775ba382e7a4e09263fc06e7c00569b6a05c" is the output of 24# this script when run with the argument "domain.example". 25 26import sys 27import hashlib 28import dns.name 29 30if len(sys.argv) < 2: 31 print("Usage: %s name" % sys.argv[0]) 32 33NAME = dns.name.from_text(sys.argv[1]).to_wire() 34print(hashlib.sha1(NAME).hexdigest()) 35