00000004
  #   ˆl–äY>”ªh¥8 …q¶nÅ1hßÈ„ß¿Å ?÷     ############################################################################
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# 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 http://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
############################################################################

import re
import ply.lex as lex
import ply.yacc as yacc
from string import *
from copy import copy


############################################################################
# PolicyLex: a lexer for the policy file syntax.
############################################################################
class PolicyLex:
    reserved = ('POLICY',
                'ALGORITHM_POLICY',
                'ZONE',
                'ALGORITHM',
                'DIRECTORY',
                'KEYTTL',
                'KEY_SIZE',
                'ROLL_PERIOD',
                'PRE_PUBLISH',
                'POST_PUBLISH',
                'COVERAGE',
                'STANDBY',
                'NONE')

    tokens = reserved + ('DATESUFFIX',
                         'KEYTYPE',
                         'ALGNAME',
                         'STR',
                         'QSTRING',
                         'NUMBER',
                         'LBRACE',
                         'RBRACE',
                         'SEMI')
    reserved_map = {}

    t_ignore           = ' \t'
    t_ignore_olcomment = r'(//|\#).*'

    t_LBRACE           = r'\{'
    t_RBRACE           = r'\}'
    t_SEMI             = r';';

    def t_newline(self, t):
        r'\n+'
        t.lexer.lineno += t.value.count("\n")

    def t_comment(self, t):
        r'/\*(.|\n)*?\*/'
        t.lexer.lineno += t.value.count('\n')

    def t_DATESUFFIX(self, t):
        r'(?i)(?<=[0-9 \t])(y(?:ears|ear|ea|e)?|mo(?:nths|nth|nt|n)?|w(?:eeks|eek|ee|e)?|d(?:ays|ay|a)?|h(?:ours|our|ou|o)?|mi(?:nutes|nute|nut|nu|n)?|s(?:econds|econd|econ|eco|ec|e)?)\b'
        t.value = re.match(r'(?i)(y|mo|w|d|h|mi|s)([a-z]*)', t.value).group(1).lower()
        return t

    def t_KEYTYPE(self, t):
        r'(?i)\b(KSK|ZSK)\b'
        t.value = t.value.upper()
        return t

    def t_ALGNAME(self, t):
        r'(?i)\b(RSAMD5|DH|DSA|NSEC3DSA|ECC|RSASHA1|NSEC3RSASHA1|RSASHA256|RSASHA512|ECCGOST|ECDSAP256SHA256|ECDSAP384SHA384|ED25519|ED448)\b'
        t.value = t.value.upper()
        return t

    def t_STR(self, t):
        r'[A-Za-z._-][\w._-]*'
        t.type = self.reserved_map.get(t.value, "STR")
        return t

    def t_QSTRING(self, t):
        r'"([^"\n]|(\\"))*"'
        t.type = self.reserved_map.get(t.value, "QSTRING")
        t.value = t.value[1:-1]
        return t

    def t_NUMBER(self, t):
        r'\d+'
        t.value = int(t.value)
        return t

    def t_error(self, t):
        print("Illegal character '%s'" % t.value[0])
        t.lexer.skip(1)

    def __init__(self, **kwargs):
        if 'maketrans' in dir(str):
            trans = str.maketrans('_', '-')
        else:
            trans = maketrans('_', '-')
        for r in self.reserved:
            self.reserved_map[r.lower().translate(trans)] = r
        self.lexer = lex.lex(object=self, **kwargs)

    def test(self, text):
        self.lexer.input(text)
        while True:
            t = self.lexer.token()
            if not t:
                break
            print(t)

############################################################################
# Policy: this object holds a set of DNSSEC policy settings.
############################################################################
class Policy:
    is_zone = False
    is_alg = False
    is_constructed = False
    ksk_rollperiod = None
    zsk_rollperiod = None
    ksk_prepublish = None
    zsk_prepublish = None
    ksk_postpublish = None
    zsk_postpublish = None
    ksk_keysize = None