#!/usr/bin/python3

# Copyright (c) 2012, Svenne Krap

#Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#

#  DSU_UPLOAD
#
# A tool to update DNSSEC DS-records at DK-HOSTMASTER (.dk) via "DS Update" (DSU)
# Spec: https://www.dk-hostmaster.dk/english/tech-notes/dnssec/dsu/
#

import sys
import urllib.request
import urllib.parse

postdata = []
if len(sys.argv) == 3: 
    postdata.append(("userid",sys.argv[1].upper()))
    keyfile = sys.argv[2]
elif len(sys.argv) == 2:
    print ("Username:"),
    userid = sys.stdin.readline().strip()
    print ("Username entered was " + userid)
    postdata.append(("userid",userid))
    keyfile = sys.argv[1]
else:
	print("dsu_upload [dkhm-handle] <ds-rr-file>");
	print("be ready to provide the password on stdin (best piped from gpg :)")
	print("dd-rr-file is expected to be same format as from dnssec-dsfromkey")
	sys.exit();

print ("Password:"),
password = sys.stdin.readline().strip()
print ("Password entered was " + password)
postdata.append(("password",password))

keydata = open(keyfile,"r").read().split("\n")
domain = None
keynum = 0
for line in keydata:
	if len(line) == 0: continue
	fields = line.split(" ")	
	if domain is None:
		domain = fields[0]
		postdata.append(("domain",domain[:-1]))
	else:
		if domain != fields[0]:
			print("prior : " + domain + ", now : " + fields[0])
			print("-> key has mixed domains, exiting")
			sys.exit()
	keynum += 1
	if keynum > 5:
		print("Maximum number of keys is 5, exiting")
		sys.exit()
	postdata.append(("keytag" + str(keynum),fields[3]))
	postdata.append(("algorithm" + str(keynum),fields[4]))
	postdata.append(("digest_type" + str(keynum),fields[5]))
	keydigest = ''.join(fields[6:])
	postdata.append(("digest" + str(keynum),keydigest))

request = urllib.parse.urlencode(postdata).encode('utf-8')
print("Sending data: \n" + request.decode('utf-8'))
try:
	fp=urllib.request.urlopen("https://dsu.dk-hostmaster.dk/1.0",request)
except urllib.error.HTTPError as e:
	fp = e

print("Status : " + str(fp.code) + " : " + fp.read().decode('utf-8'))