+++ /dev/null
-import re, datetime
-from ipaddress import IPv4Address, IPv6Address
-from typing import List, Dict, Any, Iterator, Tuple, Sequence
-
-
-second = 1
-minute = 60*second
-hour = 60*minute
-day = 24*hour
-week = 7*day
-
-REGEX_label = r'[a-zA-Z90-9]([a-zA-Z90-9-]{0,61}[a-zA-Z90-9])?' # max. 63 characters; must not start or end with hyphen
-
-def check_label(label: str) -> str:
- pattern = r'^{0}$'.format(REGEX_label)
- if re.match(pattern, label):
- return label
- raise Exception(label+" is not a valid label")
-
-def check_hostname(name: str) -> str:
- # check hostname for validity
- pattern = r'^{0}(\.{0})*\.?$'.format(REGEX_label)
- if re.match(pattern, name):
- return name
- raise Exception(name+" is not a valid hostname")
-
-def check_hex(data: str) -> str:
- if re.match('^[a-fA-F0-9]+$', data):
- return data
- raise Exception(data+" is not valid hex data")
-
-def time(time: int) -> str:
- if time == 0:
- return "0"
- elif time % week == 0:
- return str(time//week)+"w"
- elif time % day == 0:
- return str(time//day)+"d"
- elif time % hour == 0:
- return str(time//hour)+"h"
- elif time % minute == 0:
- return str(time//minute)+"m"
- else:
- return str(time)
-
-def column_widths(datas: Sequence, widths: Sequence[int]):
- assert len(datas) == len(widths)+1, "There must be as one more data points as widths"
- result = ""
- width_sum = 0
- for data, width in zip(datas, widths): # will *not* cover the last point
- result += str(data)+" " # add data point, and a minimal space
- width_sum += width
- if len(result) < width_sum: # add padding
- result += (width_sum - len(result))*" "
- # last data point
- return result+str(datas[-1])
-
-
-## Enums
-class Protocol:
- TCP = 'tcp'
- UDP = 'udp'
-
-class Algorithm:
- RSA_SHA256 = 8
-
-class Digest:
- SHA1 = 1
- SHA256 = 2
-
-
-## Record types
-class A:
- def __init__(self, address: str) -> None:
- self._address = IPv4Address(address)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR(owner, 'A', self._address)
-
-
-class AAAA:
- def __init__(self, address: str) -> None:
- self._address = IPv6Address(address)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR(owner, 'AAAA', self._address)
-
-
-class MX:
- def __init__(self, name: str, prio: int = 10) -> None:
- self._priority = int(prio)
- self._name = check_hostname(name)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR(owner, 'MX', '{0} {1}'.format(self._priority, zone.abs_hostname(self._name)))
-
-
-class SRV:
- def __init__(self, protocol: str, service: str, name: str, port: int, prio: int, weight: int) -> None:
- self._service = check_label(service)
- self._protocol = check_label(protocol)
- self._priority = int(prio)
- self._weight = int(weight)
- self._port = int(port)
- self._name = check_hostname(name)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR('_{0}._{1}.{2}'.format(self._service, self._protocol, owner), 'SRV',
- '{0} {1} {2} {3}'.format(self._priority, self._weight, self._port, zone.abs_hostname(self._name)))
-
-
-class TLSA:
- class Usage:
- CA = 0 # certificate must pass the usual CA check, with the CA specified by the TLSA record
- EndEntity_PlusCAs = 1 # the certificate must match the TLSA record *and* pass the usual CA check
- TrustAnchor = 2 # the certificate must pass a check with the TLSA record giving the (only) trust anchor
- EndEntity = 3 # the certificate must match the TLSA record
-
- class Selector:
- Full = 0
- SubjectPublicKeyInfo = 1
-
- class MatchingType:
- Exact = 0
- SHA256 = 1
- SHA512 = 2
-
- def __init__(self, protocol: str, port: int, usage: int, selector: int, matching_type: int, data: str) -> None:
- self._port = int(port)
- self._protocol = str(protocol)
- self._usage = int(usage)
- self._selector = int(selector)
- self._matching_type = int(matching_type)
- self._data = check_hex(data)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR('_{0}._{1}.{2}'.format(self._port, self._protocol, owner), 'TLSA', '{0} {1} {2} {3}'.format(self._usage, self._selector, self._matching_type, self._data))
-
-
-class CNAME:
- def __init__(self, name: str) -> None:
- self._name = check_hostname(name)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR(owner, 'CNAME', zone.abs_hostname(self._name))
-
-
-class NS:
- def __init__(self, name: str) -> None:
- self._name = check_hostname(name)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR(owner, 'NS', zone.abs_hostname(self._name))
-
-
-class DS:
- def __init__(self, tag: int, alg: int, digest: int, key: str) -> None:
- self._tag = int(tag)
- self._key = check_hex(key)
- self._alg = int(alg)
- self._digest = int(digest)
-
- def generate_rr(self, owner: str, zone: 'Zone') -> Any:
- return zone.RR(owner, 'DS', '{0} {1} {2} {3}'.format(self._tag, self._alg, self._digest, self._key))
-
-## Higher-level classes
-class Name:
- def __init__(self, *records: List[Any]) -> None:
- self._records = records
-
- def generate_rrs(self, owner: str, zone: 'Zone') -> Iterator:
- for record in self._records:
- # this could still be a list
- if isinstance(record, list):
- for subrecord in record:
- yield subrecord.generate_rr(owner, zone)
- else:
- yield record.generate_rr(owner, zone)
-
-
-def CName(name: str) -> Name:
- return Name(CNAME(name))
-
-
-def Delegation(name: str) -> Name:
- return Name(NS(name))
-
-
-def SecureDelegation(name: str, tag: int, alg: int, digest: int, key: str) -> Name:
- return Name(NS(name), DS(tag, alg, digest, key))
-
-
-class Zone:
- def __init__(self, name: str, serialfile: str, mail: str, NS: List[str],
- secondary_refresh: int, secondary_retry: int, secondary_expire: int,
- NX_TTL: int = None, A_TTL: int = None, other_TTL: int = None,
- domains: Dict[str, Any] = {}) -> None:
- self._serialfile = serialfile
-
- if not name.endswith('.'): raise Exception("Expected an absolute hostname")
- self._name = check_hostname(name)
- if not mail.endswith('.'): raise Exception("Mail must be absolute, end with a dot")
- atpos = mail.find('@')
- if atpos < 0 or atpos > mail.find('.'): raise Exception("Mail must contain an @ before the first dot")
- self._mail = check_hostname(mail.replace('@', '.', 1))
- self._NS = list(map(check_hostname, NS))
-
- self._refresh = secondary_refresh
- self._retry = secondary_retry
- self._expire = secondary_expire
-
- if other_TTL is None: raise Exception("Must give other_TTL")
- self._NX_TTL = NX_TTL
- self._A_TTL = self._AAAA_TTL = A_TTL
- self._other_TTL = other_TTL
-
- self._domains = domains
-
- def RR(self, owner: str, recordType: str, data: str) -> str:
- '''generate given RR, in textual representation'''
- assert re.match(r'^[A-Z]+$', recordType), "got invalid record type"
- # figure out TTL
- attrname = "_"+recordType+"_TTL"
- TTL = None # type: int
- if hasattr(self, attrname):
- TTL = getattr(self, attrname)
- if TTL is None:
- TTL = self._other_TTL
- # be done
- return column_widths((self.abs_hostname(owner), time(TTL), recordType, data), (32, 8, 8))
-
- def abs_hostname(self, name):
- if name == '.' or name == '@':
- return self._name
- if name.endswith('.'):
- return name
- return name+"."+self._name
-
- def inc_serial(self) -> int:
- # get serial
- cur_serial = 0
- try:
- with open(self._serialfile) as f:
- cur_serial = int(f.read())
- except FileNotFoundError:
- pass
- # increment serial
- cur_serial += 1
- # save serial
- with open(self._serialfile, 'w') as f:
- f.write(str(cur_serial))
- # be done
- return cur_serial
-
- def generate_rrs(self) -> Iterator:
- # SOA record
- serial = self.inc_serial()
- yield self.RR(self._name, 'SOA',
- ('{NS} {mail} {serial} {refresh} {retry} {expire} {NX_TTL}'+
- ' ; primns mail serial refresh retry expire NX_TTL').format(
- NS=self.abs_hostname(self._NS[0]), mail=self._mail, serial=serial,
- refresh=time(self._refresh), retry=time(self._retry), expire=time(self._expire),
- NX_TTL=time(self._NX_TTL))
- )
- # NS records
- for name in self._NS:
- yield NS(name).generate_rr(self._name, self)
- # all the rest
- for name in sorted(self._domains.keys(), key=lambda s: list(reversed(s.split('.')))):
- for rr in self._domains[name].generate_rrs(name, self):
- yield rr
-
- def write(self) -> None:
- print(";; {0} zone file, generated by zonemaker <https://www.ralfj.de/projects/zonemaker> on {1}".format(self._name, datetime.datetime.now()))
- for rr in self.generate_rrs():
- print(rr)
projects / zonemaker.git / blobdiff