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#!/usr/bin/python
# Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# SPDX-License-Identifier: MPL-2.0
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, you can obtain one at https://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
from xml.etree import cElementTree as ET
from collections import defaultdict
import re
from ply import yacc
from ply import lex
from isc import dnskey
############################################################################
# Translate KASP duration values into seconds
############################################################################
class KaspTime:
# pylint: disable=invalid-name
class KTLex:
# pylint: disable=invalid-name
tokens = ("P", "T", "Y", "M", "D", "H", "S", "NUM")
t_P = r"(?i)P"
t_T = r"(?i)T"
t_Y = r"(?i)Y"
t_M = r"(?i)M"
t_D = r"(?i)D"
t_H = r"(?i)H"
t_S = r"(?i)S"
@staticmethod
def t_NUM(t):
r"\d+"
t.value = int(t.value)
return t
@staticmethod
def t_error(t):
print("Illegal character '%s'" % t.value[0])
t.lexer.skip(1)
def __init__(self):
self.lexer = lex.lex(object=self)
def __init__(self):
self.lexer = self.KTLex()
self.tokens = self.lexer.tokens
self.parser = yacc.yacc(debug=False, write_tables=False, module=self)
def parse(self, text):
self.lexer.lexer.lineno = 0
return self.parser.parse(text)
@staticmethod
def p_ktime_4(p):
"ktime : P periods T times"
p[0] = p[2] + p[4]
@staticmethod
def p_ktime_3(p):
"ktime : P T times"
p[0] = p[3]
@staticmethod
def p_ktime_2(p):
"ktime : P periods"
p[0] = p[2]
@staticmethod
def p_periods_1(p):
"periods : period"
p[0] = p[1]
@staticmethod
def p_periods_2(p):
"periods : periods period"
p[0] = p[1] + p[2]
@staticmethod
def p_times_1(p):
"times : time"
p[0] = p[1]
@staticmethod
def p_times_2(p):
"times : times time"
p[0] = p[1] + p[2]
@staticmethod
def p_period(p):
"""period : NUM Y
| NUM M
| NUM D"""
if p[2].lower() == "y":
p[0] = int(p[1]) * 31536000
elif p[2].lower() == "m":
p[0] = int(p[1]) * 2592000
elif p[2].lower() == "d":
p[0] += int(p[1]) * 86400
@staticmethod
def p_time(p):
"""time : NUM H
| NUM M
| NUM S"""
if p[2].lower() == "h":
p[0] = int(p[1]) * 3600
elif p[2].lower() == "m":
p[0] = int(p[1]) * 60
elif p[2].lower() == "s":
p[0] = int(p[1])
@staticmethod
def p_error():
print("Syntax error")
############################################################################
# Load the contents of a KASP XML file as a python dictionary
############################################################################
class Kasp:
# pylint: disable=invalid-name
@staticmethod
def _todict(t):
d = {t.tag: {} if t.attrib else None}
children = list(t)
if children:
dd = defaultdict(list)
for dc in map(Kasp._todict, children):
for k, v in dc.iteritems():
dd[k].append(v)
k = {k: v[0] if len(v) == 1 else v for k, v in dd.items()}
d = {t.tag: k}
if t.attrib:
d[t.tag].update(("@" + k, v) for k, v in t.attrib.iteritems())
if t.text:
text = t.text.strip()
if children or t.attrib:
if text:
d[t.tag]["#text"] = text
else:
d[t.tag] = text
return d
def __init__(self, filename):
self._dict = Kasp._todict(ET.parse(filename).getroot())
def __getitem__(self, key):
return self._dict[key]
def __len__(self):
return len(self._dict)
def __iter__(self):
return self._dict.__iter__()
def __repr__(self):
return repr(self._dict)
############################################################################
# Load the contents of a KASP XML file as a python dictionary
############################################################################
if __name__ == "__main__":
import sys
if len(sys.argv) < 2:
print("Usage: kasp2policy <filename>")
sys.exit(1)
KINFO = Kasp(sys.argv[1])
try:
KINFO = Kasp(sys.argv[1])
except FileNotFoundError:
print("%s: unable to load KASP file '%s'" % (sys.argv[0], sys.argv[1]))
sys.exit(1)
KT = KaspTime()
FIRST = True
for policy in KINFO["KASP"]["Policy"]:
if not policy["@name"] or not policy["Keys"]:
continue
if not FIRST:
print("")
FIRST = False
if policy["Description"]:
desc = policy["Description"].strip()
print("# %s" % re.sub(r"\n\s*", "\n# ", desc))
print("policy %s {" % policy["@name"])
ksk = policy["Keys"]["KSK"]
zsk = policy["Keys"]["ZSK"]
kalg = ksk["Algorithm"]
zalg = zsk["Algorithm"]
algnum = kalg["#text"] or zalg["#text"]
if algnum:
print("\talgorithm %s;" % dnskey.algstr(int(algnum)))
if policy["Keys"]["TTL"]:
print("\tkeyttl %d;" % KT.parse(policy["Keys"]["TTL"]))
if kalg["@length"]:
print("\tkey-size ksk %d;" % int(kalg["@length"]))
if zalg["@length"]:
print("\tkey-size zsk %d;" % int(zalg["@length"]))
if ksk["Lifetime"]:
print("\troll-period ksk %d;" % KT.parse(ksk["Lifetime"]))
if zsk["Lifetime"]:
print("\troll-period zsk %d;" % KT.parse(zsk["Lifetime"]))
if ksk["Standby"]:
print("\tstandby ksk %d;" % int(ksk["Standby"]))
if zsk["Standby"]:
print("\tstandby zsk %d;" % int(zsk["Standby"]))
print("};")
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