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freeipa/ipaserver/plugins/dns.py
Petr Spacek bf96b80200 DNS: Improve field descriptions for SRV records 
Reviewed-By: Martin Basti <mbasti@redhat.com>
2016-10-11 16:48:47 +02:00

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# Authors:
# Martin Kosek <mkosek@redhat.com>
# Pavel Zuna <pzuna@redhat.com>
#
# Copyright (C) 2010 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from __future__ import absolute_import
import netaddr
import time
import re
import binascii
import encodings.idna
import dns.name
import dns.exception
import dns.rdatatype
import dns.resolver
import six
from ipalib.dns import (extra_name_format,
get_extra_rrtype,
get_part_rrtype,
get_record_rrtype,
get_rrparam_from_part,
has_cli_options,
iterate_rrparams_by_parts,
part_name_format,
record_name_format)
from ipalib.frontend import Method, Object
from ipalib.request import context
from ipalib import api, errors, output
from ipalib import Command
from ipalib.capabilities import (
VERSION_WITHOUT_CAPABILITIES,
client_has_capability)
from ipalib.parameters import (Flag, Bool, Int, Decimal, Str, StrEnum, Any,
DNSNameParam)
from ipalib.plugable import Registry
from .baseldap import (
pkey_to_value,
LDAPObject,
LDAPCreate,
LDAPUpdate,
LDAPSearch,
LDAPQuery,
LDAPDelete,
LDAPRetrieve)
from ipalib import _
from ipalib import messages
from ipalib.util import (normalize_zonemgr,
get_dns_forward_zone_update_policy,
get_dns_reverse_zone_update_policy,
get_reverse_zone_default, REVERSE_DNS_ZONES,
normalize_zone, validate_dnssec_global_forwarder,
DNSSECSignatureMissingError, UnresolvableRecordError,
EDNS0UnsupportedError, DNSSECValidationError,
validate_dnssec_zone_forwarder_step1,
validate_dnssec_zone_forwarder_step2,
verify_host_resolvable,
validate_bind_forwarder,
ipaddr_validator)
from ipaplatform import services
from ipapython.dn import DN
from ipapython.ipautil import CheckedIPAddress
from ipapython.dnsutil import check_zone_overlap
from ipapython.dnsutil import DNSName
from ipapython.dnsutil import related_to_auto_empty_zone
from ipaserver.dns_data_management import (
IPASystemRecords,
IPADomainIsNotManagedByIPAError,
)
if six.PY3:
unicode = str
__doc__ = _("""
Domain Name System (DNS)
""") + _("""
Manage DNS zone and resource records.
""") + _("""
SUPPORTED ZONE TYPES
* Master zone (dnszone-*), contains authoritative data.
* Forward zone (dnsforwardzone-*), forwards queries to configured forwarders
(a set of DNS servers).
""") + _("""
USING STRUCTURED PER-TYPE OPTIONS
""") + _("""
There are many structured DNS RR types where DNS data stored in LDAP server
is not just a scalar value, for example an IP address or a domain name, but
a data structure which may be often complex. A good example is a LOC record
[RFC1876] which consists of many mandatory and optional parts (degrees,
minutes, seconds of latitude and longitude, altitude or precision).
""") + _("""
It may be difficult to manipulate such DNS records without making a mistake
and entering an invalid value. DNS module provides an abstraction over these
raw records and allows to manipulate each RR type with specific options. For
each supported RR type, DNS module provides a standard option to manipulate
a raw records with format --<rrtype>-rec, e.g. --mx-rec, and special options
for every part of the RR structure with format --<rrtype>-<partname>, e.g.
--mx-preference and --mx-exchanger.
""") + _("""
When adding a record, either RR specific options or standard option for a raw
value can be used, they just should not be combined in one add operation. When
modifying an existing entry, new RR specific options can be used to change
one part of a DNS record, where the standard option for raw value is used
to specify the modified value. The following example demonstrates
a modification of MX record preference from 0 to 1 in a record without
modifying the exchanger:
ipa dnsrecord-mod --mx-rec="0 mx.example.com." --mx-preference=1
""") + _("""
EXAMPLES:
""") + _("""
Add new zone:
ipa dnszone-add example.com --admin-email=admin@example.com
""") + _("""
Add system permission that can be used for per-zone privilege delegation:
ipa dnszone-add-permission example.com
""") + _("""
Modify the zone to allow dynamic updates for hosts own records in realm EXAMPLE.COM:
ipa dnszone-mod example.com --dynamic-update=TRUE
""") + _("""
This is the equivalent of:
ipa dnszone-mod example.com --dynamic-update=TRUE \\
--update-policy="grant EXAMPLE.COM krb5-self * A; grant EXAMPLE.COM krb5-self * AAAA; grant EXAMPLE.COM krb5-self * SSHFP;"
""") + _("""
Modify the zone to allow zone transfers for local network only:
ipa dnszone-mod example.com --allow-transfer=192.0.2.0/24
""") + _("""
Add new reverse zone specified by network IP address:
ipa dnszone-add --name-from-ip=192.0.2.0/24
""") + _("""
Add second nameserver for example.com:
ipa dnsrecord-add example.com @ --ns-rec=nameserver2.example.com
""") + _("""
Add a mail server for example.com:
ipa dnsrecord-add example.com @ --mx-rec="10 mail1"
""") + _("""
Add another record using MX record specific options:
ipa dnsrecord-add example.com @ --mx-preference=20 --mx-exchanger=mail2
""") + _("""
Add another record using interactive mode (started when dnsrecord-add, dnsrecord-mod,
or dnsrecord-del are executed with no options):
ipa dnsrecord-add example.com @
Please choose a type of DNS resource record to be added
The most common types for this type of zone are: NS, MX, LOC
DNS resource record type: MX
MX Preference: 30
MX Exchanger: mail3
Record name: example.com
MX record: 10 mail1, 20 mail2, 30 mail3
NS record: nameserver.example.com., nameserver2.example.com.
""") + _("""
Delete previously added nameserver from example.com:
ipa dnsrecord-del example.com @ --ns-rec=nameserver2.example.com.
""") + _("""
Add LOC record for example.com:
ipa dnsrecord-add example.com @ --loc-rec="49 11 42.4 N 16 36 29.6 E 227.64m"
""") + _("""
Add new A record for www.example.com. Create a reverse record in appropriate
reverse zone as well. In this case a PTR record "2" pointing to www.example.com
will be created in zone 2.0.192.in-addr.arpa.
ipa dnsrecord-add example.com www --a-rec=192.0.2.2 --a-create-reverse
""") + _("""
Add new PTR record for www.example.com
ipa dnsrecord-add 2.0.192.in-addr.arpa. 2 --ptr-rec=www.example.com.
""") + _("""
Add new SRV records for LDAP servers. Three quarters of the requests
should go to fast.example.com, one quarter to slow.example.com. If neither
is available, switch to backup.example.com.
ipa dnsrecord-add example.com _ldap._tcp --srv-rec="0 3 389 fast.example.com"
ipa dnsrecord-add example.com _ldap._tcp --srv-rec="0 1 389 slow.example.com"
ipa dnsrecord-add example.com _ldap._tcp --srv-rec="1 1 389 backup.example.com"
""") + _("""
The interactive mode can be used for easy modification:
ipa dnsrecord-mod example.com _ldap._tcp
No option to modify specific record provided.
Current DNS record contents:
SRV record: 0 3 389 fast.example.com, 0 1 389 slow.example.com, 1 1 389 backup.example.com
Modify SRV record '0 3 389 fast.example.com'? Yes/No (default No):
Modify SRV record '0 1 389 slow.example.com'? Yes/No (default No): y
SRV Priority [0]: (keep the default value)
SRV Weight [1]: 2 (modified value)
SRV Port [389]: (keep the default value)
SRV Target [slow.example.com]: (keep the default value)
1 SRV record skipped. Only one value per DNS record type can be modified at one time.
Record name: _ldap._tcp
SRV record: 0 3 389 fast.example.com, 1 1 389 backup.example.com, 0 2 389 slow.example.com
""") + _("""
After this modification, three fifths of the requests should go to
fast.example.com and two fifths to slow.example.com.
""") + _("""
An example of the interactive mode for dnsrecord-del command:
ipa dnsrecord-del example.com www
No option to delete specific record provided.
Delete all? Yes/No (default No): (do not delete all records)
Current DNS record contents:
A record: 192.0.2.2, 192.0.2.3
Delete A record '192.0.2.2'? Yes/No (default No):
Delete A record '192.0.2.3'? Yes/No (default No): y
Record name: www
A record: 192.0.2.2 (A record 192.0.2.3 has been deleted)
""") + _("""
Show zone example.com:
ipa dnszone-show example.com
""") + _("""
Find zone with "example" in its domain name:
ipa dnszone-find example
""") + _("""
Find records for resources with "www" in their name in zone example.com:
ipa dnsrecord-find example.com www
""") + _("""
Find A records with value 192.0.2.2 in zone example.com
ipa dnsrecord-find example.com --a-rec=192.0.2.2
""") + _("""
Show records for resource www in zone example.com
ipa dnsrecord-show example.com www
""") + _("""
Delegate zone sub.example to another nameserver:
ipa dnsrecord-add example.com ns.sub --a-rec=203.0.113.1
ipa dnsrecord-add example.com sub --ns-rec=ns.sub.example.com.
""") + _("""
Delete zone example.com with all resource records:
ipa dnszone-del example.com
""") + _("""
If a global forwarder is configured, all queries for which this server is not
authoritative (e.g. sub.example.com) will be routed to the global forwarder.
Global forwarding configuration can be overridden per-zone.
""") + _("""
Semantics of forwarding in IPA matches BIND semantics and depends on the type
of zone:
* Master zone: local BIND replies authoritatively to queries for data in
the given zone (including authoritative NXDOMAIN answers) and forwarding
affects only queries for names below zone cuts (NS records) of locally
served zones.
* Forward zone: forward zone contains no authoritative data. BIND forwards
queries, which cannot be answered from its local cache, to configured
forwarders.
""") + _("""
Semantics of the --forwarder-policy option:
* none - disable forwarding for the given zone.
* first - forward all queries to configured forwarders. If they fail,
do resolution using DNS root servers.
* only - forward all queries to configured forwarders and if they fail,
return failure.
""") + _("""
Disable global forwarding for given sub-tree:
ipa dnszone-mod example.com --forward-policy=none
""") + _("""
This configuration forwards all queries for names outside the example.com
sub-tree to global forwarders. Normal recursive resolution process is used
for names inside the example.com sub-tree (i.e. NS records are followed etc.).
""") + _("""
Forward all requests for the zone external.example.com to another forwarder
using a "first" policy (it will send the queries to the selected forwarder
and if not answered it will use global root servers):
ipa dnsforwardzone-add external.example.com --forward-policy=first \\
--forwarder=203.0.113.1
""") + _("""
Change forward-policy for external.example.com:
ipa dnsforwardzone-mod external.example.com --forward-policy=only
""") + _("""
Show forward zone external.example.com:
ipa dnsforwardzone-show external.example.com
""") + _("""
List all forward zones:
ipa dnsforwardzone-find
""") + _("""
Delete forward zone external.example.com:
ipa dnsforwardzone-del external.example.com
""") + _("""
Resolve a host name to see if it exists (will add default IPA domain
if one is not included):
ipa dns-resolve www.example.com
ipa dns-resolve www
""") + _("""
GLOBAL DNS CONFIGURATION
""") + _("""
DNS configuration passed to command line install script is stored in a local
configuration file on each IPA server where DNS service is configured. These
local settings can be overridden with a common configuration stored in LDAP
server:
""") + _("""
Show global DNS configuration:
ipa dnsconfig-show
""") + _("""
Modify global DNS configuration and set a list of global forwarders:
ipa dnsconfig-mod --forwarder=203.0.113.113
""")
register = Registry()
# supported resource record types
_record_types = (
u'A', u'AAAA', u'A6', u'AFSDB', u'APL', u'CERT', u'CNAME', u'DHCID', u'DLV',
u'DNAME', u'DS', u'HIP', u'HINFO', u'IPSECKEY', u'KEY', u'KX', u'LOC',
u'MD', u'MINFO', u'MX', u'NAPTR', u'NS', u'NSEC', u'NXT', u'PTR', u'RRSIG',
u'RP', u'SIG', u'SPF', u'SRV', u'SSHFP', u'TLSA', u'TXT', u"URI"
)
# DNS zone record identificator
_dns_zone_record = DNSName.empty
# attributes derived from record types
_record_attributes = [str(record_name_format % t.lower())
for t in _record_types]
# Deprecated
# supported DNS classes, IN = internet, rest is almost never used
_record_classes = (u'IN', u'CS', u'CH', u'HS')
# IN record class
_IN = dns.rdataclass.IN
# NS record type
_NS = dns.rdatatype.from_text('NS')
_output_permissions = (
output.summary,
output.Output('result', bool, _('True means the operation was successful')),
output.Output('value', unicode, _('Permission value')),
)
def _rname_validator(ugettext, zonemgr):
try:
DNSName(zonemgr) # test only if it is valid domain name
except (ValueError, dns.exception.SyntaxError) as e:
return unicode(e)
return None
def _create_zone_serial():
"""
Generate serial number for zones. bind-dyndb-ldap expects unix time in
to be used for SOA serial.
SOA serial in a date format would also work, but it may be set to far
future when many DNS updates are done per day (more than 100). Unix
timestamp is more resilient to this issue.
"""
return int(time.time())
def _reverse_zone_name(netstr):
try:
netaddr.IPAddress(str(netstr))
except (netaddr.AddrFormatError, ValueError):
pass
else:
# use more sensible default prefix than netaddr default
return unicode(get_reverse_zone_default(netstr))
net = netaddr.IPNetwork(netstr)
items = net.ip.reverse_dns.split('.')
if net.version == 4:
return u'.'.join(items[4 - net.prefixlen // 8:])
elif net.version == 6:
return u'.'.join(items[32 - net.prefixlen // 4:])
else:
return None
def _validate_ip4addr(ugettext, ipaddr):
return ipaddr_validator(ugettext, ipaddr, 4)
def _validate_ip6addr(ugettext, ipaddr):
return ipaddr_validator(ugettext, ipaddr, 6)
def _validate_ipnet(ugettext, ipnet):
try:
netaddr.IPNetwork(ipnet)
except (netaddr.AddrFormatError, ValueError, UnboundLocalError):
return _('invalid IP network format')
return None
def _validate_bind_aci(ugettext, bind_acis):
if not bind_acis:
return
bind_acis = bind_acis.split(';')
if bind_acis[-1]:
return _('each ACL element must be terminated with a semicolon')
else:
bind_acis.pop(-1)
for bind_aci in bind_acis:
if bind_aci in ("any", "none", "localhost", "localnets"):
continue
if bind_aci.startswith('!'):
bind_aci = bind_aci[1:]
try:
CheckedIPAddress(bind_aci, parse_netmask=True, allow_loopback=True)
except (netaddr.AddrFormatError, ValueError) as e:
return unicode(e)
except UnboundLocalError:
return _(u"invalid address format")
def _normalize_bind_aci(bind_acis):
if not bind_acis:
return
bind_acis = bind_acis.split(';')
normalized = []
for bind_aci in bind_acis:
if not bind_aci:
continue
if bind_aci in ("any", "none", "localhost", "localnets"):
normalized.append(bind_aci)
continue
prefix = ""
if bind_aci.startswith('!'):
bind_aci = bind_aci[1:]
prefix = "!"
try:
ip = CheckedIPAddress(bind_aci, parse_netmask=True,
allow_loopback=True)
if '/' in bind_aci: # addr with netmask
netmask = "/%s" % ip.prefixlen
else:
netmask = ""
normalized.append(u"%s%s%s" % (prefix, str(ip), netmask))
continue
except Exception:
normalized.append(bind_aci)
continue
acis = u';'.join(normalized)
acis += u';'
return acis
def _validate_nsec3param_record(ugettext, value):
_nsec3param_pattern = (r'^(?P<alg>\d+) (?P<flags>\d+) (?P<iter>\d+) '
r'(?P<salt>([0-9a-fA-F]{2})+|-)$')
rec = re.compile(_nsec3param_pattern, flags=re.U)
result = rec.match(value)
if result is None:
return _(u'expected format: <0-255> <0-255> <0-65535> '
'even-length_hexadecimal_digits_or_hyphen')
alg = int(result.group('alg'))
flags = int(result.group('flags'))
iterations = int(result.group('iter'))
salt = result.group('salt')
if alg > 255:
return _('algorithm value: allowed interval 0-255')
if flags > 255:
return _('flags value: allowed interval 0-255')
if iterations > 65535:
return _('iterations value: allowed interval 0-65535')
if salt == u'-':
return None
try:
binascii.a2b_hex(salt)
except TypeError as e:
return _('salt value: %(err)s') % {'err': e}
return None
def _hostname_validator(ugettext, value):
assert isinstance(value, DNSName)
if len(value.make_absolute().labels) < 3:
return _('invalid domain-name: not fully qualified')
return None
def _no_wildcard_validator(ugettext, value):
"""Disallow usage of wildcards as RFC 4592 section 4 recommends
"""
assert isinstance(value, DNSName)
if value.is_wild():
return _('should not be a wildcard domain name (RFC 4592 section 4)')
return None
def is_forward_record(zone, str_address):
addr = netaddr.IPAddress(str_address)
if addr.version == 4:
result = api.Command['dnsrecord_find'](zone, arecord=str_address)
elif addr.version == 6:
result = api.Command['dnsrecord_find'](zone, aaaarecord=str_address)
else:
raise ValueError('Invalid address family')
return result['count'] > 0
def add_forward_record(zone, name, str_address):
addr = netaddr.IPAddress(str_address)
try:
if addr.version == 4:
api.Command['dnsrecord_add'](zone, name, arecord=str_address)
elif addr.version == 6:
api.Command['dnsrecord_add'](zone, name, aaaarecord=str_address)
else:
raise ValueError('Invalid address family')
except errors.EmptyModlist:
pass # the entry already exists and matches
def get_reverse_zone(ipaddr):
"""
resolve the reverse zone for IP address and see if it is managed by IPA
server
:param ipaddr: host IP address
:return: tuple containing name of the reverse zone and the name of the
record
"""
ip = netaddr.IPAddress(str(ipaddr))
revdns = DNSName(unicode(ip.reverse_dns))
revzone = DNSName(dns.resolver.zone_for_name(revdns))
try:
api.Command['dnszone_show'](revzone)
except errors.NotFound:
raise errors.NotFound(
reason=_(
'DNS reverse zone %(revzone)s for IP address '
'%(addr)s is not managed by this server') % dict(
addr=ipaddr, revzone=revzone)
)
revname = revdns.relativize(revzone)
return revzone, revname
def add_records_for_host_validation(option_name, host, domain, ip_addresses, check_forward=True, check_reverse=True):
assert isinstance(host, DNSName)
assert isinstance(domain, DNSName)
try:
api.Command['dnszone_show'](domain)['result']
except errors.NotFound:
raise errors.NotFound(
reason=_('DNS zone %(zone)s not found') % dict(zone=domain)
)
if not isinstance(ip_addresses, (tuple, list)):
ip_addresses = [ip_addresses]
for ip_address in ip_addresses:
try:
ip = CheckedIPAddress(
ip_address, match_local=False, allow_multicast=True)
except Exception as e:
raise errors.ValidationError(name=option_name, error=unicode(e))
if check_forward:
if is_forward_record(domain, unicode(ip)):
raise errors.DuplicateEntry(
message=_(u'IP address %(ip)s is already assigned in domain %(domain)s.')\
% dict(ip=str(ip), domain=domain))
if check_reverse:
try:
# we prefer lookup of the IP through the reverse zone
revzone, revname = get_reverse_zone(ip)
reverse = api.Command['dnsrecord_find'](revzone, idnsname=revname)
if reverse['count'] > 0:
raise errors.DuplicateEntry(
message=_(u'Reverse record for IP address %(ip)s already exists in reverse zone %(zone)s.')\
% dict(ip=str(ip), zone=revzone))
except errors.NotFound:
pass
def add_records_for_host(host, domain, ip_addresses, add_forward=True, add_reverse=True):
assert isinstance(host, DNSName)
assert isinstance(domain, DNSName)
if not isinstance(ip_addresses, (tuple, list)):
ip_addresses = [ip_addresses]
for ip_address in ip_addresses:
ip = CheckedIPAddress(
ip_address, match_local=False, allow_multicast=True)
if add_forward:
add_forward_record(domain, host, unicode(ip))
if add_reverse:
try:
revzone, revname = get_reverse_zone(ip)
addkw = {'ptrrecord': host.derelativize(domain).ToASCII()}
api.Command['dnsrecord_add'](revzone, revname, **addkw)
except errors.EmptyModlist:
# the entry already exists and matches
pass
def _dns_name_to_string(value, raw=False):
if isinstance(value, unicode):
try:
value = DNSName(value)
except Exception:
return value
assert isinstance(value, DNSName)
if raw:
return value.ToASCII()
else:
return unicode(value)
def _check_entry_objectclass(entry, objectclasses):
"""
Check if entry contains all objectclasses
"""
if not isinstance(objectclasses, (list, tuple)):
objectclasses = [objectclasses, ]
if not entry.get('objectclass'):
return False
entry_objectclasses = [o.lower() for o in entry['objectclass']]
for o in objectclasses:
if o not in entry_objectclasses:
return False
return True
def _check_DN_objectclass(ldap, dn, objectclasses):
try:
entry = ldap.get_entry(dn, [u'objectclass', ])
except Exception:
return False
else:
return _check_entry_objectclass(entry, objectclasses)
class DNSRecord(Str):
# a list of parts that create the actual raw DNS record
parts = None
# an optional list of parameters used in record-specific operations
extra = None
supported = True
# supported RR types: https://fedorahosted.org/bind-dyndb-ldap/browser/doc/schema
label_format = _("%s record")
part_label_format = "%s %s"
doc_format = _('Raw %s records')
option_group_format = _('%s Record')
see_rfc_msg = _("(see RFC %s for details)")
cli_name_format = "%s_%s"
format_error_msg = None
kwargs = Str.kwargs + (
('validatedns', bool, True),
('normalizedns', bool, True),
)
# should be replaced in subclasses
rrtype = None
rfc = None
def __init__(self, name=None, *rules, **kw):
if self.rrtype not in _record_types:
raise ValueError("Unknown RR type: %s. Must be one of %s" % \
(str(self.rrtype), ", ".join(_record_types)))
if not name:
name = "%s*" % (record_name_format % self.rrtype.lower())
kw.setdefault('cli_name', '%s_rec' % self.rrtype.lower())
kw.setdefault('label', self.label_format % self.rrtype)
kw.setdefault('doc', self.doc_format % self.rrtype)
kw.setdefault('option_group', self.option_group_format % self.rrtype)
if not self.supported:
kw['flags'] = ('no_option',)
super(DNSRecord, self).__init__(name, *rules, **kw)
def _get_part_values(self, value):
values = value.split()
if len(values) != len(self.parts):
return None
return tuple(values)
def _part_values_to_string(self, values, idna=True):
self._validate_parts(values)
parts = []
for v in values:
if v is None:
continue
elif isinstance(v, DNSName) and idna:
v = v.ToASCII()
elif not isinstance(v, unicode):
v = unicode(v)
parts.append(v)
return u" ".join(parts)
def get_parts_from_kw(self, kw, raise_on_none=True):
part_names = tuple(part_name_format % (self.rrtype.lower(), part.name)
for part in self.parts)
vals = tuple(kw.get(part_name) for part_name in part_names)
if all(val is None for val in vals):
return
if raise_on_none:
for val_id,val in enumerate(vals):
if val is None and self.parts[val_id].required:
cli_name = self.cli_name_format % (self.rrtype.lower(), self.parts[val_id].name)
raise errors.ConversionError(name=self.name,
error=_("'%s' is a required part of DNS record") % cli_name)
return vals
def _validate_parts(self, parts):
if len(parts) != len(self.parts):
raise errors.ValidationError(name=self.name,
error=_("Invalid number of parts!"))
def _convert_scalar(self, value, index=None):
if isinstance(value, (tuple, list)):
return self._part_values_to_string(value)
return super(DNSRecord, self)._convert_scalar(value)
def normalize(self, value):
if self.normalizedns:
if isinstance(value, (tuple, list)):
value = tuple(
self._normalize_parts(v) for v in value \
if v is not None
)
elif value is not None:
value = (self._normalize_parts(value),)
return super(DNSRecord, self).normalize(value)
def _normalize_parts(self, value):
"""
Normalize a DNS record value using normalizers for its parts.
"""
if self.parts is None:
return value
try:
values = self._get_part_values(value)
if not values:
return value
converted_values = [ part._convert_scalar(values[part_id]) \
if values[part_id] is not None else None
for part_id, part in enumerate(self.parts)
]
new_values = [ part.normalize(converted_values[part_id]) \
for part_id, part in enumerate(self.parts) ]
value = self._convert_scalar(new_values)
except Exception:
# cannot normalize, rather return original value than fail
pass
return value
def _rule_validatedns(self, _, value):
if not self.validatedns:
return
if value is None:
return
if not self.supported:
return _('DNS RR type "%s" is not supported by bind-dyndb-ldap plugin') \
% self.rrtype
if self.parts is None:
return
# validate record format
values = self._get_part_values(value)
if not values:
if not self.format_error_msg:
part_names = [part.name.upper() for part in self.parts]
if self.rfc:
see_rfc_msg = " " + self.see_rfc_msg % self.rfc
else:
see_rfc_msg = ""
return _('format must be specified as "%(format)s" %(rfcs)s') \
% dict(format=" ".join(part_names), rfcs=see_rfc_msg)
else:
return self.format_error_msg
# validate every part
for part_id, part in enumerate(self.parts):
val = part.normalize(values[part_id])
val = part.convert(val)
part.validate(val)
return None
def _convert_dnsrecord_part(self, part):
"""
All parts of DNSRecord need to be processed and modified before they
can be added to global DNS API. For example a prefix need to be added
before part name so that the name is unique in the global namespace.
"""
name = part_name_format % (self.rrtype.lower(), part.name)
cli_name = self.cli_name_format % (self.rrtype.lower(), part.name)
label = self.part_label_format % (self.rrtype, unicode(part.label))
option_group = self.option_group_format % self.rrtype
flags = list(part.flags) + ['virtual_attribute']
if not part.required:
flags.append('dnsrecord_optional')
if not self.supported:
flags.append("no_option")
return part.clone_rename(name,
cli_name=cli_name,
label=label,
required=False,
option_group=option_group,
flags=flags)
def _convert_dnsrecord_extra(self, extra):
"""
Parameters for special per-type behavior need to be processed in the
same way as record parts in _convert_dnsrecord_part().
"""
name = extra_name_format % (self.rrtype.lower(), extra.name)
cli_name = self.cli_name_format % (self.rrtype.lower(), extra.name)
label = self.part_label_format % (self.rrtype, unicode(extra.label))
option_group = self.option_group_format % self.rrtype
flags = list(extra.flags) + ['virtual_attribute']
return extra.clone_rename(name,
cli_name=cli_name,
label=label,
required=False,
option_group=option_group,
flags=flags)
def get_parts(self):
if self.parts is None:
return tuple()
return tuple(self._convert_dnsrecord_part(part) for part in self.parts)
def get_extra(self):
if self.extra is None:
return tuple()
return tuple(self._convert_dnsrecord_extra(extra) for extra in self.extra)
# callbacks for per-type special record behavior
def dnsrecord_add_pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
def dnsrecord_add_post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
class ForwardRecord(DNSRecord):
extra = (
Flag('create_reverse?',
label=_('Create reverse'),
doc=_('Create reverse record for this IP Address'),
flags=['no_update']
),
)
def dnsrecord_add_pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
reverse_option = self._convert_dnsrecord_extra(self.extra[0])
if options.get(reverse_option.name):
records = entry_attrs.get(self.name, [])
if not records:
# --<rrtype>-create-reverse is set, but there are not records
raise errors.RequirementError(name=self.name)
for record in records:
add_records_for_host_validation(self.name, keys[-1], keys[-2], record,
check_forward=False,
check_reverse=True)
setattr(context, '%s_reverse' % self.name, entry_attrs.get(self.name))
def dnsrecord_add_post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
rev_records = getattr(context, '%s_reverse' % self.name, [])
if rev_records:
# make sure we don't run this post callback action again in nested
# commands, line adding PTR record in add_records_for_host
delattr(context, '%s_reverse' % self.name)
for record in rev_records:
try:
add_records_for_host(keys[-1], keys[-2], record,
add_forward=False, add_reverse=True)
except Exception as e:
raise errors.NonFatalError(
reason=_('Cannot create reverse record for "%(value)s": %(exc)s') \
% dict(value=record, exc=unicode(e)))
class UnsupportedDNSRecord(DNSRecord):
"""
Records which are not supported by IPA CLI, but we allow to show them if
LDAP contains these records.
"""
supported = False
def _get_part_values(self, value):
return tuple()
class ARecord(ForwardRecord):
rrtype = 'A'
rfc = 1035
parts = (
Str('ip_address',
_validate_ip4addr,
label=_('IP Address'),
),
)
class A6Record(DNSRecord):
rrtype = 'A6'
rfc = 3226
parts = (
Str('data',
label=_('Record data'),
),
)
def _get_part_values(self, value):
# A6 RR type is obsolete and only a raw interface is provided
return (value,)
class AAAARecord(ForwardRecord):
rrtype = 'AAAA'
rfc = 3596
parts = (
Str('ip_address',
_validate_ip6addr,
label=_('IP Address'),
),
)
class AFSDBRecord(DNSRecord):
rrtype = 'AFSDB'
rfc = 1183
parts = (
Int('subtype?',
label=_('Subtype'),
minvalue=0,
maxvalue=65535,
),
DNSNameParam('hostname',
label=_('Hostname'),
),
)
class APLRecord(UnsupportedDNSRecord):
rrtype = 'APL'
rfc = 3123
class CERTRecord(DNSRecord):
rrtype = 'CERT'
rfc = 4398
parts = (
Int('type',
label=_('Certificate Type'),
minvalue=0,
maxvalue=65535,
),
Int('key_tag',
label=_('Key Tag'),
minvalue=0,
maxvalue=65535,
),
Int('algorithm',
label=_('Algorithm'),
minvalue=0,
maxvalue=255,
),
Str('certificate_or_crl',
label=_('Certificate/CRL'),
),
)
class CNAMERecord(DNSRecord):
rrtype = 'CNAME'
rfc = 1035
parts = (
DNSNameParam('hostname',
label=_('Hostname'),
doc=_('A hostname which this alias hostname points to'),
),
)
class DHCIDRecord(UnsupportedDNSRecord):
rrtype = 'DHCID'
rfc = 4701
class DNAMERecord(DNSRecord):
rrtype = 'DNAME'
rfc = 2672
parts = (
DNSNameParam('target',
label=_('Target'),
),
)
class DSRecord(DNSRecord):
rrtype = 'DS'
rfc = 4034
parts = (
Int('key_tag',
label=_('Key Tag'),
minvalue=0,
maxvalue=65535,
),
Int('algorithm',
label=_('Algorithm'),
minvalue=0,
maxvalue=255,
),
Int('digest_type',
label=_('Digest Type'),
minvalue=0,
maxvalue=255,
),
Str('digest',
label=_('Digest'),
pattern=r'^[0-9a-fA-F]+$',
pattern_errmsg=u'only hexadecimal digits are allowed'
),
)
class DLVRecord(DSRecord):
# must use same attributes as DSRecord
rrtype = 'DLV'
rfc = 4431
class HINFORecord(UnsupportedDNSRecord):
rrtype = 'HINFO'
rfc = 1035
class HIPRecord(UnsupportedDNSRecord):
rrtype = 'HIP'
rfc = 5205
class KEYRecord(UnsupportedDNSRecord):
# managed by BIND itself
rrtype = 'KEY'
rfc = 2535
class IPSECKEYRecord(UnsupportedDNSRecord):
rrtype = 'IPSECKEY'
rfc = 4025
class KXRecord(DNSRecord):
rrtype = 'KX'
rfc = 2230
parts = (
Int('preference',
label=_('Preference'),
doc=_('Preference given to this exchanger. Lower values are more preferred'),
minvalue=0,
maxvalue=65535,
),
DNSNameParam('exchanger',
label=_('Exchanger'),
doc=_('A host willing to act as a key exchanger'),
),
)
class LOCRecord(DNSRecord):
rrtype = 'LOC'
rfc = 1876
parts = (
Int('lat_deg',
label=_('Degrees Latitude'),
minvalue=0,
maxvalue=90,
),
Int('lat_min?',
label=_('Minutes Latitude'),
minvalue=0,
maxvalue=59,
),
Decimal('lat_sec?',
label=_('Seconds Latitude'),
minvalue='0.0',
maxvalue='59.999',
precision=3,
),
StrEnum('lat_dir',
label=_('Direction Latitude'),
values=(u'N', u'S',),
),
Int('lon_deg',
label=_('Degrees Longitude'),
minvalue=0,
maxvalue=180,
),
Int('lon_min?',
label=_('Minutes Longitude'),
minvalue=0,
maxvalue=59,
),
Decimal('lon_sec?',
label=_('Seconds Longitude'),
minvalue='0.0',
maxvalue='59.999',
precision=3,
),
StrEnum('lon_dir',
label=_('Direction Longitude'),
values=(u'E', u'W',),
),
Decimal('altitude',
label=_('Altitude'),
minvalue='-100000.00',
maxvalue='42849672.95',
precision=2,
),
Decimal('size?',
label=_('Size'),
minvalue='0.0',
maxvalue='90000000.00',
precision=2,
),
Decimal('h_precision?',
label=_('Horizontal Precision'),
minvalue='0.0',
maxvalue='90000000.00',
precision=2,
),
Decimal('v_precision?',
label=_('Vertical Precision'),
minvalue='0.0',
maxvalue='90000000.00',
precision=2,
),
)
format_error_msg = _("""format must be specified as
"d1 [m1 [s1]] {"N"|"S"} d2 [m2 [s2]] {"E"|"W"} alt["m"] [siz["m"] [hp["m"] [vp["m"]]]]"
where:
d1: [0 .. 90] (degrees latitude)
d2: [0 .. 180] (degrees longitude)
m1, m2: [0 .. 59] (minutes latitude/longitude)
s1, s2: [0 .. 59.999] (seconds latitude/longitude)
alt: [-100000.00 .. 42849672.95] BY .01 (altitude in meters)
siz, hp, vp: [0 .. 90000000.00] (size/precision in meters)
See RFC 1876 for details""")
def _get_part_values(self, value):
regex = re.compile(
r'(?P<d1>\d{1,2}\s+)'
r'(?:(?P<m1>\d{1,2}\s+)'
r'(?P<s1>\d{1,2}(?:\.\d{1,3})?\s+)?)?'
r'(?P<dir1>[NS])\s+'
r'(?P<d2>\d{1,3}\s+)'
r'(?:(?P<m2>\d{1,2}\s+)'
r'(?P<s2>\d{1,2}(?:\.\d{1,3})?\s+)?)?'
r'(?P<dir2>[WE])\s+'
r'(?P<alt>-?\d{1,8}(?:\.\d{1,2})?)m?'
r'(?:\s+(?P<siz>\d{1,8}(?:\.\d{1,2})?)m?'
r'(?:\s+(?P<hp>\d{1,8}(?:\.\d{1,2})?)m?'
r'(?:\s+(?P<vp>\d{1,8}(?:\.\d{1,2})?)m?\s*)?)?)?$')
m = regex.match(value)
if m is None:
return None
return tuple(x.strip() if x is not None else x for x in m.groups())
def _validate_parts(self, parts):
super(LOCRecord, self)._validate_parts(parts)
# create part_name -> part_id map first
part_name_map = dict((part.name, part_id) \
for part_id,part in enumerate(self.parts))
requirements = ( ('lat_sec', 'lat_min'),
('lon_sec', 'lon_min'),
('h_precision', 'size'),
('v_precision', 'h_precision', 'size') )
for req in requirements:
target_part = req[0]
if parts[part_name_map[target_part]] is not None:
required_parts = req[1:]
if any(parts[part_name_map[part]] is None for part in required_parts):
target_cli_name = self.cli_name_format % (self.rrtype.lower(), req[0])
required_cli_names = [ self.cli_name_format % (self.rrtype.lower(), part)
for part in req[1:] ]
error = _("'%(required)s' must not be empty when '%(name)s' is set") % \
dict(required=', '.join(required_cli_names),
name=target_cli_name)
raise errors.ValidationError(name=self.name, error=error)
class MDRecord(UnsupportedDNSRecord):
# obsoleted, use MX instead
rrtype = 'MD'
rfc = 1035
class MINFORecord(UnsupportedDNSRecord):
rrtype = 'MINFO'
rfc = 1035
class MXRecord(DNSRecord):
rrtype = 'MX'
rfc = 1035
parts = (
Int('preference',
label=_('Preference'),
doc=_('Preference given to this exchanger. Lower values are more preferred'),
minvalue=0,
maxvalue=65535,
),
DNSNameParam('exchanger',
label=_('Exchanger'),
doc=_('A host willing to act as a mail exchanger'),
),
)
class NSRecord(DNSRecord):
rrtype = 'NS'
rfc = 1035
parts = (
DNSNameParam('hostname',
label=_('Hostname'),
),
)
class NSECRecord(UnsupportedDNSRecord):
# managed by BIND itself
rrtype = 'NSEC'
rfc = 4034
def _validate_naptr_flags(ugettext, flags):
allowed_flags = u'SAUP'
flags = flags.replace('"','').replace('\'','')
for flag in flags:
if flag not in allowed_flags:
return _('flags must be one of "S", "A", "U", or "P"')
class NAPTRRecord(DNSRecord):
rrtype = 'NAPTR'
rfc = 2915
parts = (
Int('order',
label=_('Order'),
minvalue=0,
maxvalue=65535,
),
Int('preference',
label=_('Preference'),
minvalue=0,
maxvalue=65535,
),
Str('flags',
_validate_naptr_flags,
label=_('Flags'),
normalizer=lambda x:x.upper()
),
Str('service',
label=_('Service'),
),
Str('regexp',
label=_('Regular Expression'),
),
Str('replacement',
label=_('Replacement'),
),
)
class NXTRecord(UnsupportedDNSRecord):
rrtype = 'NXT'
rfc = 2535
class PTRRecord(DNSRecord):
rrtype = 'PTR'
rfc = 1035
parts = (
DNSNameParam('hostname',
#RFC 2317 section 5.2 -- can be relative
label=_('Hostname'),
doc=_('The hostname this reverse record points to'),
),
)
class RPRecord(UnsupportedDNSRecord):
rrtype = 'RP'
rfc = 1183
class SRVRecord(DNSRecord):
rrtype = 'SRV'
rfc = 2782
parts = (
Int('priority',
label=_('Priority (order)'),
doc=_('Lower number means higher priority. Clients will attempt '
'to contact the server with the lowest-numbered priority '
'they can reach.'),
minvalue=0,
maxvalue=65535,
),
Int('weight',
label=_('Weight'),
doc=_('Relative weight for entries with the same priority.'),
minvalue=0,
maxvalue=65535,
),
Int('port',
label=_('Port'),
minvalue=0,
maxvalue=65535,
),
DNSNameParam('target',
label=_('Target'),
doc=_('The domain name of the target host or \'.\' if the service is decidedly not available at this domain'),
),
)
def _sig_time_validator(ugettext, value):
time_format = "%Y%m%d%H%M%S"
try:
time.strptime(value, time_format)
except ValueError:
return _('the value does not follow "YYYYMMDDHHMMSS" time format')
class SIGRecord(UnsupportedDNSRecord):
# managed by BIND itself
rrtype = 'SIG'
rfc = 2535
class SPFRecord(UnsupportedDNSRecord):
rrtype = 'SPF'
rfc = 4408
class RRSIGRecord(UnsupportedDNSRecord):
# managed by BIND itself
rrtype = 'RRSIG'
rfc = 4034
class SSHFPRecord(DNSRecord):
rrtype = 'SSHFP'
rfc = 4255
parts = (
Int('algorithm',
label=_('Algorithm'),
minvalue=0,
maxvalue=255,
),
Int('fp_type',
label=_('Fingerprint Type'),
minvalue=0,
maxvalue=255,
),
Str('fingerprint',
label=_('Fingerprint'),
),
)
def _get_part_values(self, value):
# fingerprint part can contain space in LDAP, return it as one part
values = value.split(None, 2)
if len(values) != len(self.parts):
return None
return tuple(values)
class TLSARecord(DNSRecord):
rrtype = 'TLSA'
rfc = 6698
parts = (
Int('cert_usage',
label=_('Certificate Usage'),
minvalue=0,
maxvalue=255,
),
Int('selector',
label=_('Selector'),
minvalue=0,
maxvalue=255,
),
Int('matching_type',
label=_('Matching Type'),
minvalue=0,
maxvalue=255,
),
Str('cert_association_data',
label=_('Certificate Association Data'),
),
)
class TXTRecord(DNSRecord):
rrtype = 'TXT'
rfc = 1035
parts = (
Str('data',
label=_('Text Data'),
),
)
def _get_part_values(self, value):
# ignore any space in TXT record
return (value,)
def _normalize_uri_target(uri_target):
"""DNS-escape "\ characters and double-quote target."""
# is user-provided string is already quoted?
if uri_target[0:1] == uri_target[-1:] == '"':
uri_target = uri_target[1:-1]
# RFC 7553 section 4.4: The Target MUST NOT be an empty URI ("").
# minlength in param will detect this
if not uri_target:
return
return u'"{0}"'.format(uri_target)
class URIRecord(DNSRecord):
rrtype = 'URI'
rfc = 7553
parts = (
Int('priority',
label=_('Priority (order)'),
doc=_('Lower number means higher priority. Clients will attempt '
'to contact the URI with the lowest-numbered priority '
'they can reach.'),
minvalue=0,
maxvalue=65535,
),
Int('weight',
label=_('Weight'),
doc=_('Relative weight for entries with the same priority.'),
minvalue=0,
maxvalue=65535,
),
Str('target',
label=_('Target Uniform Resource Identifier'),
doc=_('Target Uniform Resource Identifier according to RFC 3986'),
minlength=1,
# This field holds the URI of the target, enclosed in double-quote
# characters (e.g. "uri:").
normalizer=_normalize_uri_target,
),
)
_dns_records = (
ARecord(),
AAAARecord(),
A6Record(),
AFSDBRecord(),
APLRecord(),
CERTRecord(),
CNAMERecord(),
DHCIDRecord(),
DLVRecord(),
DNAMERecord(),
DSRecord(),
HIPRecord(),
IPSECKEYRecord(),
KEYRecord(),
KXRecord(),
LOCRecord(),
MXRecord(),
NAPTRRecord(),
NSRecord(),
NSECRecord(),
PTRRecord(),
RRSIGRecord(),
RPRecord(),
SIGRecord(),
SPFRecord(),
SRVRecord(),
SSHFPRecord(),
TLSARecord(),
TXTRecord(),
URIRecord(),
)
def __dns_record_options_iter():
for opt in (Any('dnsrecords?',
label=_('Records'),
flags=['no_create', 'no_search', 'no_update'],),
Str('dnstype?',
label=_('Record type'),
flags=['no_create', 'no_search', 'no_update'],),
Str('dnsdata?',
label=_('Record data'),
flags=['no_create', 'no_search', 'no_update'],)):
# These 3 options are used in --structured format. They are defined
# rather in takes_params than has_output_params because of their
# order - they should be printed to CLI before any DNS part param
yield opt
for option in _dns_records:
yield option
for part in option.get_parts():
yield part
for extra in option.get_extra():
yield extra
_dns_record_options = tuple(__dns_record_options_iter())
def check_ns_rec_resolvable(zone, name, log):
assert isinstance(zone, DNSName)
assert isinstance(name, DNSName)
if name.is_empty():
name = zone.make_absolute()
elif not name.is_absolute():
# this is a DNS name relative to the zone
name = name.derelativize(zone.make_absolute())
try:
verify_host_resolvable(name)
except errors.DNSNotARecordError:
raise errors.NotFound(
reason=_('Nameserver \'%(host)s\' does not have a corresponding '
'A/AAAA record') % {'host': name}
)
def dns_container_exists(ldap):
try:
ldap.get_entry(DN(api.env.container_dns, api.env.basedn), [])
except errors.NotFound:
return False
return True
def dnssec_installed(ldap):
"""
* Method opendnssecinstance.get_dnssec_key_masters() CANNOT be used in the
dns plugin, or any plugin accessible for common users! *
Why?: The content of service container is not readable for common users.
This method only try to find if a DNSSEC service container exists on any
replica. What means that DNSSEC key master is installed.
:param ldap: ldap connection
:return: True if DNSSEC was installed, otherwise False
"""
dn = DN(api.env.container_masters, api.env.basedn)
filter_attrs = {
u'cn': u'DNSSEC',
u'objectclass': u'ipaConfigObject',
}
only_masters_f = ldap.make_filter(filter_attrs, rules=ldap.MATCH_ALL)
try:
ldap.find_entries(filter=only_masters_f, base_dn=dn)
except errors.NotFound:
return False
return True
def default_zone_update_policy(zone):
if zone.is_reverse():
return get_dns_reverse_zone_update_policy(api.env.realm, zone.ToASCII())
else:
return get_dns_forward_zone_update_policy(api.env.realm)
def _convert_to_idna(value):
"""
Function converts a unicode value to idna, without extra validation.
If conversion fails, None is returned
"""
assert isinstance(value, unicode)
try:
idna_val = value
start_dot = u''
end_dot = u''
if idna_val.startswith(u'.'):
idna_val = idna_val[1:]
start_dot = u'.'
if idna_val.endswith(u'.'):
idna_val = idna_val[:-1]
end_dot = u'.'
idna_val = encodings.idna.nameprep(idna_val)
idna_val = re.split(r'(?<!\\)\.', idna_val)
idna_val = u'%s%s%s' % (start_dot,
u'.'.join(encodings.idna.ToASCII(x)
for x in idna_val),
end_dot)
return idna_val
except Exception:
pass
return None
def _create_idn_filter(cmd, ldap, term=None, **options):
if term:
#include idna values to search
term_idna = _convert_to_idna(term)
if term_idna and term != term_idna:
term = (term, term_idna)
search_kw = {}
attr_extra_filters = []
for attr, value in cmd.args_options_2_entry(**options).items():
if not isinstance(value, list):
value = [value]
for i, v in enumerate(value):
if isinstance(v, DNSName):
value[i] = v.ToASCII()
elif attr in map_names_to_records:
record = map_names_to_records[attr]
parts = record._get_part_values(v)
if parts is None:
value[i] = v
continue
try:
value[i] = record._part_values_to_string(parts)
except errors.ValidationError:
value[i] = v
#create MATCH_ANY filter for multivalue
if len(value) > 1:
f = ldap.make_filter({attr: value}, rules=ldap.MATCH_ANY)
attr_extra_filters.append(f)
else:
search_kw[attr] = value
if cmd.obj.search_attributes:
search_attrs = cmd.obj.search_attributes
else:
search_attrs = cmd.obj.default_attributes
if cmd.obj.search_attributes_config:
config = ldap.get_ipa_config()
config_attrs = config.get(cmd.obj.search_attributes_config, [])
if len(config_attrs) == 1 and (isinstance(config_attrs[0],
six.string_types)):
search_attrs = config_attrs[0].split(',')
search_kw['objectclass'] = cmd.obj.object_class
attr_filter = ldap.make_filter(search_kw, rules=ldap.MATCH_ALL)
if attr_extra_filters:
#combine filter if there is any idna value
attr_extra_filters.append(attr_filter)
attr_filter = ldap.combine_filters(attr_extra_filters,
rules=ldap.MATCH_ALL)
search_kw = {}
for a in search_attrs:
search_kw[a] = term
term_filter = ldap.make_filter(search_kw, exact=False)
member_filter = cmd.get_member_filter(ldap, **options)
filter = ldap.combine_filters(
(term_filter, attr_filter, member_filter), rules=ldap.MATCH_ALL
)
return filter
map_names_to_records = {record_name_format % record.rrtype.lower(): record
for record in _dns_records if record.supported}
def _records_idn_postprocess(record, **options):
for attr in record.keys():
attr = attr.lower()
try:
param = map_names_to_records[attr]
except KeyError:
continue
if not isinstance(param, DNSRecord):
continue
part_params = param.get_parts()
rrs = []
for dnsvalue in record[attr]:
parts = param._get_part_values(dnsvalue)
if parts is None:
continue
parts = list(parts)
try:
for (i, p) in enumerate(parts):
if isinstance(part_params[i], DNSNameParam):
parts[i] = DNSName(p)
rrs.append(param._part_values_to_string(parts,
idna=options.get('raw', False)))
except (errors.ValidationError, errors.ConversionError):
rrs.append(dnsvalue)
record[attr] = rrs
def _normalize_zone(zone):
if isinstance(zone, unicode):
# normalize only non-IDNA zones
try:
zone.encode('ascii')
except UnicodeError:
pass
else:
return zone.lower()
return zone
def _get_auth_zone_ldap(api, name):
"""
Find authoritative zone in LDAP for name. Only active zones are considered.
:param name:
:return: (zone, truncated)
zone: authoritative zone, or None if authoritative zone is not in LDAP
"""
assert isinstance(name, DNSName)
ldap = api.Backend.ldap2
# Create all possible parent zone names
search_name = name.make_absolute()
zone_names = []
for i, name in enumerate(search_name):
zone_name_abs = DNSName(search_name[i:]).ToASCII()
zone_names.append(zone_name_abs)
# compatibility with IPA < 4.0, zone name can be relative
zone_names.append(zone_name_abs[:-1])
# Create filters
objectclass_filter = ldap.make_filter({'objectclass':'idnszone'})
zonenames_filter = ldap.make_filter({'idnsname': zone_names})
zoneactive_filter = ldap.make_filter({'idnsZoneActive': 'true'})
complete_filter = ldap.combine_filters(
[objectclass_filter, zonenames_filter, zoneactive_filter],
rules=ldap.MATCH_ALL
)
try:
entries, truncated = ldap.find_entries(
filter=complete_filter,
attrs_list=['idnsname'],
base_dn=DN(api.env.container_dns, api.env.basedn),
scope=ldap.SCOPE_ONELEVEL
)
except errors.NotFound:
return None, False
# always use absolute zones
matched_auth_zones = [entry.single_value['idnsname'].make_absolute()
for entry in entries]
# return longest match
return max(matched_auth_zones, key=len), truncated
def _get_longest_match_ns_delegation_ldap(api, zone, name):
"""
Searches for deepest delegation for name in LDAP zone.
NOTE: NS record in zone apex is not considered as delegation.
It returns None if there is no delegation outside of zone apex.
Example:
zone: example.com.
name: ns.sub.example.com.
records:
extra.ns.sub.example.com.
sub.example.com.
example.com
result: sub.example.com.
:param zone: zone name
:param name:
:return: (match, truncated);
match: delegation name if success, or None if no delegation record exists
"""
assert isinstance(zone, DNSName)
assert isinstance(name, DNSName)
ldap = api.Backend.ldap2
# get zone DN
zone_dn = api.Object.dnszone.get_dn(zone)
if name.is_absolute():
relative_record_name = name.relativize(zone.make_absolute())
else:
relative_record_name = name
# Name is zone apex
if relative_record_name.is_empty():
return None, False
# create list of possible record names
possible_record_names = [DNSName(relative_record_name[i:]).ToASCII()
for i in range(len(relative_record_name))]
# search filters
name_filter = ldap.make_filter({'idnsname': [possible_record_names]})
objectclass_filter = ldap.make_filter({'objectclass': 'idnsrecord'})
complete_filter = ldap.combine_filters(
[name_filter, objectclass_filter],
rules=ldap.MATCH_ALL
)
try:
entries, truncated = ldap.find_entries(
filter=complete_filter,
attrs_list=['idnsname', 'nsrecord'],
base_dn=zone_dn,
scope=ldap.SCOPE_ONELEVEL
)
except errors.NotFound:
return None, False
matched_records = []
# test if entry contains NS records
for entry in entries:
if entry.get('nsrecord'):
matched_records.append(entry.single_value['idnsname'])
if not matched_records:
return None, truncated
# return longest match
return max(matched_records, key=len), truncated
def _find_subtree_forward_zones_ldap(api, name, child_zones_only=False):
"""
Search for forwardzone <name> and all child forwardzones
Filter: (|(*.<name>.)(<name>.))
:param name:
:param child_zones_only: search only for child zones
:return: (list of zonenames, truncated), list is empty if no zone found
"""
assert isinstance(name, DNSName)
ldap = api.Backend.ldap2
# prepare for filter "*.<name>."
search_name = u".%s" % name.make_absolute().ToASCII()
# we need to search zone with and without last dot, due compatibility
# with IPA < 4.0
search_names = [search_name, search_name[:-1]]
# Create filters
objectclass_filter = ldap.make_filter({'objectclass':'idnsforwardzone'})
zonenames_filter = ldap.make_filter({'idnsname': search_names}, exact=False,
trailing_wildcard=False)
if not child_zones_only:
# find also zone with exact name
exact_name = name.make_absolute().ToASCII()
# we need to search zone with and without last dot, due compatibility
# with IPA < 4.0
exact_names = [exact_name, exact_name[-1]]
exact_name_filter = ldap.make_filter({'idnsname': exact_names})
zonenames_filter = ldap.combine_filters([zonenames_filter,
exact_name_filter])
zoneactive_filter = ldap.make_filter({'idnsZoneActive': 'true'})
complete_filter = ldap.combine_filters(
[objectclass_filter, zonenames_filter, zoneactive_filter],
rules=ldap.MATCH_ALL
)
try:
entries, truncated = ldap.find_entries(
filter=complete_filter,
attrs_list=['idnsname'],
base_dn=DN(api.env.container_dns, api.env.basedn),
scope=ldap.SCOPE_ONELEVEL
)
except errors.NotFound:
return [], False
result = [entry.single_value['idnsname'].make_absolute()
for entry in entries]
return result, truncated
def _get_zone_which_makes_fw_zone_ineffective(api, fwzonename):
"""
Check if forward zone is effective.
If parent zone exists as authoritative zone, the forward zone will not
forward queries by default. It is necessary to delegate authority
to forward zone with a NS record.
Example:
Forward zone: sub.example.com
Zone: example.com
Forwarding will not work, because the server thinks it is authoritative
for zone and will return NXDOMAIN
Adding record: sub.example.com NS ns.sub.example.com.
will delegate authority, and IPA DNS server will forward DNS queries.
:param fwzonename: forwardzone
:return: (zone, truncated)
zone: None if effective, name of authoritative zone otherwise
"""
assert isinstance(fwzonename, DNSName)
auth_zone, truncated_zone = _get_auth_zone_ldap(api, fwzonename)
if not auth_zone:
return None, truncated_zone
delegation_record_name, truncated_ns =\
_get_longest_match_ns_delegation_ldap(api, auth_zone, fwzonename)
truncated = truncated_ns or truncated_zone
if delegation_record_name:
return None, truncated
return auth_zone, truncated
def _add_warning_fw_zone_is_not_effective(api, result, fwzone, version):
"""
Adds warning message to result, if required
"""
(
authoritative_zone, _truncated
) = _get_zone_which_makes_fw_zone_ineffective(api, fwzone)
if authoritative_zone:
# forward zone is not effective and forwarding will not work
messages.add_message(
version, result,
messages.ForwardzoneIsNotEffectiveWarning(
fwzone=fwzone, authzone=authoritative_zone,
ns_rec=fwzone.relativize(authoritative_zone)
)
)
def _add_warning_fw_policy_conflict_aez(result, fwzone, **options):
"""Warn if forwarding policy conflicts with an automatic empty zone."""
fwd_policy = result['result'].get(u'idnsforwardpolicy',
dnsforwardzone.default_forward_policy)
if (
fwd_policy != [u'only']
and related_to_auto_empty_zone(DNSName(fwzone))
):
messages.add_message(
options['version'], result,
messages.DNSForwardPolicyConflictWithEmptyZone()
)
class DNSZoneBase(LDAPObject):
"""
Base class for DNS Zone
"""
container_dn = api.env.container_dns
object_class = ['top']
possible_objectclasses = ['ipadnszone']
default_attributes = [
'idnsname', 'idnszoneactive', 'idnsforwarders', 'idnsforwardpolicy'
]
takes_params = (
DNSNameParam('idnsname',
_no_wildcard_validator, # RFC 4592 section 4
only_absolute=True,
cli_name='name',
label=_('Zone name'),
doc=_('Zone name (FQDN)'),
default_from=lambda name_from_ip: _reverse_zone_name(name_from_ip),
normalizer=_normalize_zone,
primary_key=True,
),
Str('name_from_ip?', _validate_ipnet,
label=_('Reverse zone IP network'),
doc=_('IP network to create reverse zone name from'),
flags=('virtual_attribute',),
),
Bool('idnszoneactive?',
cli_name='zone_active',
label=_('Active zone'),
doc=_('Is zone active?'),
flags=['no_create', 'no_update'],
attribute=True,
),
Str('idnsforwarders*',
validate_bind_forwarder,
cli_name='forwarder',
label=_('Zone forwarders'),
doc=_('Per-zone forwarders. A custom port can be specified '
'for each forwarder using a standard format "IP_ADDRESS port PORT"'),
),
StrEnum('idnsforwardpolicy?',
cli_name='forward_policy',
label=_('Forward policy'),
doc=_('Per-zone conditional forwarding policy. Set to "none" to '
'disable forwarding to global forwarder for this zone. In '
'that case, conditional zone forwarders are disregarded.'),
values=(u'only', u'first', u'none'),
),
Str('managedby',
label=_('Managedby permission'),
flags={'virtual_attribute', 'no_create', 'no_search', 'no_update'},
),
)
def get_dn(self, *keys, **options):
if not dns_container_exists(self.api.Backend.ldap2):
raise errors.NotFound(reason=_('DNS is not configured'))
zone = keys[-1]
assert isinstance(zone, DNSName)
assert zone.is_absolute()
zone_a = zone.ToASCII()
# special case when zone is the root zone ('.')
if zone == DNSName.root:
return super(DNSZoneBase, self).get_dn(zone_a, **options)
# try first relative name, a new zone has to be added as absolute
# otherwise ObjectViolation is raised
zone_a = zone_a[:-1]
dn = super(DNSZoneBase, self).get_dn(zone_a, **options)
try:
self.backend.get_entry(dn, [''])
except errors.NotFound:
zone_a = u"%s." % zone_a
dn = super(DNSZoneBase, self).get_dn(zone_a, **options)
return dn
def permission_name(self, zone):
assert isinstance(zone, DNSName)
return u"Manage DNS zone %s" % zone.ToASCII()
def get_name_in_zone(self, zone, hostname):
"""
Get name of a record that is to be added to a new zone. I.e. when
we want to add record "ipa.lab.example.com" in a zone "example.com",
this function should return "ipa.lab". Returns None when record cannot
be added to a zone. Returns '@' when the hostname is the zone record.
"""
assert isinstance(zone, DNSName)
assert zone.is_absolute()
assert isinstance(hostname, DNSName)
if not hostname.is_absolute():
return hostname
if hostname.is_subdomain(zone):
return hostname.relativize(zone)
return None
def _remove_permission(self, zone):
permission_name = self.permission_name(zone)
try:
self.api.Command['permission_del'](permission_name, force=True)
except errors.NotFound as e:
if zone == DNSName.root: # special case root zone
raise
# compatibility, older IPA versions which allows to create zone
# without absolute zone name
permission_name_rel = self.permission_name(
zone.relativize(DNSName.root)
)
try:
self.api.Command['permission_del'](permission_name_rel,
force=True)
except errors.NotFound:
raise e # re-raise original exception
def _make_zonename_absolute(self, entry_attrs, **options):
"""
Zone names can be relative in IPA < 4.0, make sure we always return
absolute zone name from ldap
"""
if options.get('raw'):
return
if "idnsname" in entry_attrs:
entry_attrs.single_value['idnsname'] = (
entry_attrs.single_value['idnsname'].make_absolute())
class DNSZoneBase_add(LDAPCreate):
takes_options = LDAPCreate.takes_options + (
Flag('skip_overlap_check',
doc=_('Force DNS zone creation even if it will overlap with '
'an existing zone.')
),
)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
try:
entry = ldap.get_entry(dn)
except errors.NotFound:
pass
else:
if _check_entry_objectclass(entry, self.obj.object_class):
self.obj.handle_duplicate_entry(*keys)
else:
raise errors.DuplicateEntry(
message=_(u'Only one zone type is allowed per zone name')
)
entry_attrs['idnszoneactive'] = 'TRUE'
if not options['skip_overlap_check']:
try:
check_zone_overlap(keys[-1], raise_on_error=False)
except ValueError as e:
raise errors.InvocationError(e.message)
return dn
class DNSZoneBase_del(LDAPDelete):
def pre_callback(self, ldap, dn, *nkeys, **options):
assert isinstance(dn, DN)
if not _check_DN_objectclass(ldap, dn, self.obj.object_class):
self.obj.handle_not_found(*nkeys)
return dn
def post_callback(self, ldap, dn, *keys, **options):
try:
self.obj._remove_permission(keys[-1])
except errors.NotFound:
pass
return True
class DNSZoneBase_mod(LDAPUpdate):
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
self.obj._make_zonename_absolute(entry_attrs, **options)
return dn
class DNSZoneBase_find(LDAPSearch):
__doc__ = _('Search for DNS zones (SOA records).')
def args_options_2_params(self, *args, **options):
# FIXME: Check that name_from_ip is valid. This is necessary because
# custom validation rules, including _validate_ipnet, are not
# used when doing a search. Once we have a parameter type for
# IP network objects, this will no longer be necessary, as the
# parameter type will handle the validation itself (see
# <https://fedorahosted.org/freeipa/ticket/2266>).
if 'name_from_ip' in options:
self.obj.params['name_from_ip'](unicode(options['name_from_ip']))
return super(DNSZoneBase_find, self).args_options_2_params(*args, **options)
def args_options_2_entry(self, *args, **options):
if 'name_from_ip' in options:
if 'idnsname' not in options:
options['idnsname'] = self.obj.params['idnsname'].get_default(**options)
del options['name_from_ip']
search_kw = super(DNSZoneBase_find, self).args_options_2_entry(*args,
**options)
name = search_kw.get('idnsname')
if name:
search_kw['idnsname'] = [name, name.relativize(DNSName.root)]
return search_kw
def pre_callback(self, ldap, filter, attrs_list, base_dn, scope, *args, **options):
assert isinstance(base_dn, DN)
# Check if DNS container exists must be here for find methods
if not dns_container_exists(self.api.Backend.ldap2):
raise errors.NotFound(reason=_('DNS is not configured'))
filter = _create_idn_filter(self, ldap, *args, **options)
return (filter, base_dn, scope)
def post_callback(self, ldap, entries, truncated, *args, **options):
for entry_attrs in entries:
self.obj._make_zonename_absolute(entry_attrs, **options)
return truncated
class DNSZoneBase_show(LDAPRetrieve):
def pre_callback(self, ldap, dn, attrs_list, *keys, **options):
assert isinstance(dn, DN)
if not _check_DN_objectclass(ldap, dn, self.obj.object_class):
self.obj.handle_not_found(*keys)
return dn
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
self.obj._make_zonename_absolute(entry_attrs, **options)
return dn
class DNSZoneBase_disable(LDAPQuery):
has_output = output.standard_value
def execute(self, *keys, **options):
ldap = self.obj.backend
dn = self.obj.get_dn(*keys, **options)
try:
entry = ldap.get_entry(dn, ['idnszoneactive', 'objectclass'])
except errors.NotFound:
self.obj.handle_not_found(*keys)
if not _check_entry_objectclass(entry, self.obj.object_class):
self.obj.handle_not_found(*keys)
entry['idnszoneactive'] = ['FALSE']
try:
ldap.update_entry(entry)
except errors.EmptyModlist:
pass
return dict(result=True, value=pkey_to_value(keys[-1], options))
class DNSZoneBase_enable(LDAPQuery):
has_output = output.standard_value
def execute(self, *keys, **options):
ldap = self.obj.backend
dn = self.obj.get_dn(*keys, **options)
try:
entry = ldap.get_entry(dn, ['idnszoneactive', 'objectclass'])
except errors.NotFound:
self.obj.handle_not_found(*keys)
if not _check_entry_objectclass(entry, self.obj.object_class):
self.obj.handle_not_found(*keys)
entry['idnszoneactive'] = ['TRUE']
try:
ldap.update_entry(entry)
except errors.EmptyModlist:
pass
return dict(result=True, value=pkey_to_value(keys[-1], options))
class DNSZoneBase_add_permission(LDAPQuery):
has_output = _output_permissions
msg_summary = _('Added system permission "%(value)s"')
def execute(self, *keys, **options):
ldap = self.obj.backend
dn = self.obj.get_dn(*keys, **options)
try:
entry_attrs = ldap.get_entry(dn, ['objectclass'])
except errors.NotFound:
self.obj.handle_not_found(*keys)
else:
if not _check_entry_objectclass(entry_attrs, self.obj.object_class):
self.obj.handle_not_found(*keys)
permission_name = self.obj.permission_name(keys[-1])
# compatibility with older IPA versions which allows relative zonenames
if keys[-1] != DNSName.root: # special case root zone
permission_name_rel = self.obj.permission_name(
keys[-1].relativize(DNSName.root)
)
try:
self.api.Object['permission'].get_dn_if_exists(
permission_name_rel)
except errors.NotFound:
pass
else:
# permission exists without absolute domain name
raise errors.DuplicateEntry(
message=_('permission "%(value)s" already exists') % {
'value': permission_name
}
)
permission = self.api.Command['permission_add_noaci'](permission_name,
ipapermissiontype=u'SYSTEM'
)['result']
dnszone_ocs = entry_attrs.get('objectclass')
if dnszone_ocs:
for oc in dnszone_ocs:
if oc.lower() == 'ipadnszone':
break
else:
dnszone_ocs.append('ipadnszone')
entry_attrs['managedby'] = [permission['dn']]
ldap.update_entry(entry_attrs)
return dict(
result=True,
value=pkey_to_value(permission_name, options),
)
class DNSZoneBase_remove_permission(LDAPQuery):
has_output = _output_permissions
msg_summary = _('Removed system permission "%(value)s"')
def execute(self, *keys, **options):
ldap = self.obj.backend
dn = self.obj.get_dn(*keys, **options)
try:
entry = ldap.get_entry(dn, ['managedby', 'objectclass'])
except errors.NotFound:
self.obj.handle_not_found(*keys)
else:
if not _check_entry_objectclass(entry, self.obj.object_class):
self.obj.handle_not_found(*keys)
entry['managedby'] = None
try:
ldap.update_entry(entry)
except errors.EmptyModlist:
# managedBy attribute is clean, lets make sure there is also no
# dangling DNS zone permission
pass
permission_name = self.obj.permission_name(keys[-1])
self.obj._remove_permission(keys[-1])
return dict(
result=True,
value=pkey_to_value(permission_name, options),
)
@register()
class dnszone(DNSZoneBase):
"""
DNS Zone, container for resource records.
"""
object_name = _('DNS zone')
object_name_plural = _('DNS zones')
object_class = DNSZoneBase.object_class + ['idnsrecord', 'idnszone']
default_attributes = DNSZoneBase.default_attributes + [
'idnssoamname', 'idnssoarname', 'idnssoaserial', 'idnssoarefresh',
'idnssoaretry', 'idnssoaexpire', 'idnssoaminimum', 'idnsallowquery',
'idnsallowtransfer', 'idnssecinlinesigning',
] + _record_attributes
label = _('DNS Zones')
label_singular = _('DNS Zone')
takes_params = DNSZoneBase.takes_params + (
DNSNameParam('idnssoamname?',
cli_name='name_server',
label=_('Authoritative nameserver'),
doc=_('Authoritative nameserver domain name'),
default=None, # value will be added in precallback from ldap
),
DNSNameParam('idnssoarname',
_rname_validator,
cli_name='admin_email',
label=_('Administrator e-mail address'),
doc=_('Administrator e-mail address'),
default=DNSName(u'hostmaster'),
normalizer=normalize_zonemgr,
autofill=True,
),
Int('idnssoaserial',
cli_name='serial',
label=_('SOA serial'),
doc=_('SOA record serial number'),
minvalue=1,
maxvalue=4294967295,
default_from=_create_zone_serial,
autofill=True,
),
Int('idnssoarefresh',
cli_name='refresh',
label=_('SOA refresh'),
doc=_('SOA record refresh time'),
minvalue=0,
maxvalue=2147483647,
default=3600,
autofill=True,
),
Int('idnssoaretry',
cli_name='retry',
label=_('SOA retry'),
doc=_('SOA record retry time'),
minvalue=0,
maxvalue=2147483647,
default=900,
autofill=True,
),
Int('idnssoaexpire',
cli_name='expire',
label=_('SOA expire'),
doc=_('SOA record expire time'),
default=1209600,
minvalue=0,
maxvalue=2147483647,
autofill=True,
),
Int('idnssoaminimum',
cli_name='minimum',
label=_('SOA minimum'),
doc=_('How long should negative responses be cached'),
default=3600,
minvalue=0,
maxvalue=2147483647,
autofill=True,
),
Int('dnsttl?',
cli_name='ttl',
label=_('Time to live'),
doc=_('Time to live for records at zone apex'),
minvalue=0,
maxvalue=2147483647, # see RFC 2181
),
Int('dnsdefaultttl?',
cli_name='default_ttl',
label=_('Default time to live'),
doc=_('Time to live for records without explicit TTL definition'),
minvalue=0,
maxvalue=2147483647, # see RFC 2181
),
StrEnum('dnsclass?',
# Deprecated
cli_name='class',
flags=['no_option'],
values=_record_classes,
),
Str('idnsupdatepolicy?',
cli_name='update_policy',
label=_('BIND update policy'),
doc=_('BIND update policy'),
default_from=lambda idnsname: default_zone_update_policy(idnsname),
autofill=True
),
Bool('idnsallowdynupdate?',
cli_name='dynamic_update',
label=_('Dynamic update'),
doc=_('Allow dynamic updates.'),
attribute=True,
default=False,
autofill=True
),
Str('idnsallowquery?',
_validate_bind_aci,
normalizer=_normalize_bind_aci,
cli_name='allow_query',
label=_('Allow query'),
doc=_('Semicolon separated list of IP addresses or networks which are allowed to issue queries'),
default=u'any;', # anyone can issue queries by default
autofill=True,
),
Str('idnsallowtransfer?',
_validate_bind_aci,
normalizer=_normalize_bind_aci,
cli_name='allow_transfer',
label=_('Allow transfer'),
doc=_('Semicolon separated list of IP addresses or networks which are allowed to transfer the zone'),
default=u'none;', # no one can issue queries by default
autofill=True,
),
Bool('idnsallowsyncptr?',
cli_name='allow_sync_ptr',
label=_('Allow PTR sync'),
doc=_('Allow synchronization of forward (A, AAAA) and reverse (PTR) records in the zone'),
),
Bool('idnssecinlinesigning?',
cli_name='dnssec',
default=False,
label=_('Allow in-line DNSSEC signing'),
doc=_('Allow inline DNSSEC signing of records in the zone'),
),
Str('nsec3paramrecord?',
_validate_nsec3param_record,
cli_name='nsec3param_rec',
label=_('NSEC3PARAM record'),
doc=_('NSEC3PARAM record for zone in format: hash_algorithm flags iterations salt'),
pattern=r'^\d+ \d+ \d+ (([0-9a-fA-F]{2})+|-)$',
pattern_errmsg=(u'expected format: <0-255> <0-255> <0-65535> '
'even-length_hexadecimal_digits_or_hyphen'),
),
)
# Permissions will be apllied for forwardzones too
# Store permissions into api.env.basedn, dns container could not exists
managed_permissions = {
'System: Add DNS Entries': {
'non_object': True,
'ipapermright': {'add'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('idnsname=*', 'cn=dns', api.env.basedn),
'replaces': [
'(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:add dns entries";allow (add) groupdn = "ldap:///cn=add dns entries,cn=permissions,cn=pbac,$SUFFIX";)',
],
'default_privileges': {'DNS Administrators', 'DNS Servers'},
},
'System: Read DNS Entries': {
'non_object': True,
'ipapermright': {'read', 'search', 'compare'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('idnsname=*', 'cn=dns', api.env.basedn),
'ipapermdefaultattr': {
'objectclass',
'a6record', 'aaaarecord', 'afsdbrecord', 'aplrecord', 'arecord',
'certrecord', 'cn', 'cnamerecord', 'dhcidrecord', 'dlvrecord',
'dnamerecord', 'dnsclass', 'dnsdefaultttl', 'dnsttl',
'dsrecord', 'hinforecord', 'hiprecord', 'idnsallowdynupdate',
'idnsallowquery', 'idnsallowsyncptr', 'idnsallowtransfer',
'idnsforwarders', 'idnsforwardpolicy', 'idnsname',
'idnssecinlinesigning', 'idnssoaexpire', 'idnssoaminimum',
'idnssoamname', 'idnssoarefresh', 'idnssoaretry',
'idnssoarname', 'idnssoaserial', 'idnsTemplateAttribute',
'idnsupdatepolicy',
'idnszoneactive', 'ipseckeyrecord','keyrecord', 'kxrecord',
'locrecord', 'managedby', 'mdrecord', 'minforecord',
'mxrecord', 'naptrrecord', 'nsecrecord', 'nsec3paramrecord',
'nsrecord', 'nxtrecord', 'ptrrecord', 'rprecord', 'rrsigrecord',
'sigrecord', 'spfrecord', 'srvrecord', 'sshfprecord',
'tlsarecord', 'txtrecord', 'urirecord', 'unknownrecord',
},
'replaces_system': ['Read DNS Entries'],
'default_privileges': {'DNS Administrators', 'DNS Servers'},
},
'System: Remove DNS Entries': {
'non_object': True,
'ipapermright': {'delete'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('idnsname=*', 'cn=dns', api.env.basedn),
'replaces': [
'(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:remove dns entries";allow (delete) groupdn = "ldap:///cn=remove dns entries,cn=permissions,cn=pbac,$SUFFIX";)',
],
'default_privileges': {'DNS Administrators', 'DNS Servers'},
},
'System: Update DNS Entries': {
'non_object': True,
'ipapermright': {'write'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('idnsname=*', 'cn=dns', api.env.basedn),
'ipapermdefaultattr': {
'objectclass', # needed for record templates
'a6record', 'aaaarecord', 'afsdbrecord', 'aplrecord', 'arecord',
'certrecord', 'cn', 'cnamerecord', 'dhcidrecord', 'dlvrecord',
'dnamerecord', 'dnsclass', 'dnsdefaultttl', 'dnsttl',
'dsrecord', 'hinforecord', 'hiprecord', 'idnsallowdynupdate',
'idnsallowquery', 'idnsallowsyncptr', 'idnsallowtransfer',
'idnsforwarders', 'idnsforwardpolicy', 'idnsname',
'idnssecinlinesigning', 'idnssoaexpire', 'idnssoaminimum',
'idnssoamname', 'idnssoarefresh', 'idnssoaretry',
'idnssoarname', 'idnssoaserial', 'idnsTemplateAttribute',
'idnsupdatepolicy',
'idnszoneactive', 'ipseckeyrecord','keyrecord', 'kxrecord',
'locrecord', 'managedby', 'mdrecord', 'minforecord',
'mxrecord', 'naptrrecord', 'nsecrecord', 'nsec3paramrecord',
'nsrecord', 'nxtrecord', 'ptrrecord', 'rprecord', 'rrsigrecord',
'sigrecord', 'spfrecord', 'srvrecord', 'sshfprecord',
'tlsarecord', 'txtrecord', 'urirecord', 'unknownrecord',
},
'replaces': [
'(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)',
'(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)',
'(targetattr = "idnsname || cn || idnsallowdynupdate || dnsttl || dnsclass || arecord || aaaarecord || a6record || nsrecord || cnamerecord || ptrrecord || srvrecord || txtrecord || mxrecord || mdrecord || hinforecord || minforecord || afsdbrecord || sigrecord || keyrecord || locrecord || nxtrecord || naptrrecord || kxrecord || certrecord || dnamerecord || dsrecord || sshfprecord || rrsigrecord || nsecrecord || idnsname || idnszoneactive || idnssoamname || idnssoarname || idnssoaserial || idnssoarefresh || idnssoaretry || idnssoaexpire || idnssoaminimum || idnsupdatepolicy || idnsallowquery || idnsallowtransfer || idnsallowsyncptr || idnsforwardpolicy || idnsforwarders || managedby")(target = "ldap:///idnsname=*,cn=dns,$SUFFIX")(version 3.0;acl "permission:update dns entries";allow (write) groupdn = "ldap:///cn=update dns entries,cn=permissions,cn=pbac,$SUFFIX";)',
],
'default_privileges': {'DNS Administrators', 'DNS Servers'},
},
'System: Read DNSSEC metadata': {
'non_object': True,
'ipapermright': {'read', 'search', 'compare'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('cn=dns', api.env.basedn),
'ipapermtargetfilter': ['(objectclass=idnsSecKey)'],
'ipapermdefaultattr': {
'idnsSecAlgorithm', 'idnsSecKeyCreated', 'idnsSecKeyPublish',
'idnsSecKeyActivate', 'idnsSecKeyInactive', 'idnsSecKeyDelete',
'idnsSecKeyZone', 'idnsSecKeyRevoke', 'idnsSecKeySep',
'idnsSecKeyRef', 'cn', 'objectclass',
},
'default_privileges': {'DNS Administrators'},
},
'System: Manage DNSSEC metadata': {
'non_object': True,
'ipapermright': {'all'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('cn=dns', api.env.basedn),
'ipapermtargetfilter': ['(objectclass=idnsSecKey)'],
'ipapermdefaultattr': {
'idnsSecAlgorithm', 'idnsSecKeyCreated', 'idnsSecKeyPublish',
'idnsSecKeyActivate', 'idnsSecKeyInactive', 'idnsSecKeyDelete',
'idnsSecKeyZone', 'idnsSecKeyRevoke', 'idnsSecKeySep',
'idnsSecKeyRef', 'cn', 'objectclass',
},
'default_privileges': {'DNS Servers'},
},
'System: Manage DNSSEC keys': {
'non_object': True,
'ipapermright': {'all'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('cn=keys', 'cn=sec', 'cn=dns', api.env.basedn),
'ipapermdefaultattr': {
'ipaPublicKey', 'ipaPrivateKey', 'ipaSecretKey',
'ipaWrappingMech','ipaWrappingKey',
'ipaSecretKeyRef', 'ipk11Private', 'ipk11Modifiable', 'ipk11Label',
'ipk11Copyable', 'ipk11Destroyable', 'ipk11Trusted',
'ipk11CheckValue', 'ipk11StartDate', 'ipk11EndDate',
'ipk11UniqueId', 'ipk11PublicKeyInfo', 'ipk11Distrusted',
'ipk11Subject', 'ipk11Id', 'ipk11Local', 'ipk11KeyType',
'ipk11Derive', 'ipk11KeyGenMechanism', 'ipk11AllowedMechanisms',
'ipk11Encrypt', 'ipk11Verify', 'ipk11VerifyRecover', 'ipk11Wrap',
'ipk11WrapTemplate', 'ipk11Sensitive', 'ipk11Decrypt',
'ipk11Sign', 'ipk11SignRecover', 'ipk11Unwrap',
'ipk11Extractable', 'ipk11AlwaysSensitive',
'ipk11NeverExtractable', 'ipk11WrapWithTrusted',
'ipk11UnwrapTemplate', 'ipk11AlwaysAuthenticate',
'objectclass',
},
'default_privileges': {'DNS Servers'},
},
}
def _rr_zone_postprocess(self, record, **options):
#Decode IDN ACE form to Unicode, raw records are passed directly from LDAP
if options.get('raw', False):
return
_records_idn_postprocess(record, **options)
def _warning_forwarding(self, result, **options):
if ('idnsforwarders' in result['result']):
messages.add_message(options.get('version', VERSION_WITHOUT_CAPABILITIES),
result, messages.ForwardersWarning())
def _warning_name_server_option(self, result, context, **options):
if getattr(context, 'show_warning_nameserver_option', False):
messages.add_message(
options['version'],
result, messages.OptionSemanticChangedWarning(
label=_(u"setting Authoritative nameserver"),
current_behavior=_(u"It is used only for setting the "
u"SOA MNAME attribute."),
hint=_(u"NS record(s) can be edited in zone apex - '@'. ")
)
)
def _warning_fw_zone_is_not_effective(self, result, *keys, **options):
"""
Warning if any operation with zone causes, a child forward zone is
not effective
"""
zone = keys[-1]
affected_fw_zones, _truncated = _find_subtree_forward_zones_ldap(
self.api, zone, child_zones_only=True)
if not affected_fw_zones:
return
for fwzone in affected_fw_zones:
_add_warning_fw_zone_is_not_effective(self.api, result, fwzone,
options['version'])
def _warning_dnssec_master_is_not_installed(self, result, **options):
dnssec_enabled = result['result'].get("idnssecinlinesigning", False)
if dnssec_enabled and not dnssec_installed(self.api.Backend.ldap2):
messages.add_message(
options['version'],
result,
messages.DNSSECMasterNotInstalled()
)
def _warning_ttl_changed_reload_needed(self, result, **options):
if 'dnsdefaultttl' in options:
messages.add_message(
options['version'],
result,
messages.ServiceRestartRequired(
service=services.service('named').systemd_name,
server=_('<all IPA DNS servers>'), )
)
@register()
class dnszone_add(DNSZoneBase_add):
__doc__ = _('Create new DNS zone (SOA record).')
takes_options = DNSZoneBase_add.takes_options + (
Flag('force',
doc=_('Force DNS zone creation even if nameserver is not '
'resolvable. (Deprecated)'),
),
Flag('skip_nameserver_check',
doc=_('Force DNS zone creation even if nameserver is not '
'resolvable.'),
),
# Deprecated
# ip-address option is not used anymore, we have to keep it
# due to compability with clients older than 4.1
Str('ip_address?',
flags=['no_option', ]
),
)
def _warning_deprecated_option(self, result, **options):
if 'ip_address' in options:
messages.add_message(
options['version'],
result,
messages.OptionDeprecatedWarning(
option='ip-address',
additional_info=u"Value will be ignored.")
)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
if options.get('force'):
options['skip_nameserver_check'] = True
dn = super(dnszone_add, self).pre_callback(
ldap, dn, entry_attrs, attrs_list, *keys, **options)
nameservers = [normalize_zone(x) for x in
self.api.Object.dnsrecord.get_dns_masters()]
server = normalize_zone(api.env.host)
zone = keys[-1]
if entry_attrs.get('idnssoamname'):
if zone.is_reverse() and not entry_attrs['idnssoamname'].is_absolute():
raise errors.ValidationError(
name='name-server',
error=_("Nameserver for reverse zone cannot be a relative DNS name"))
# verify if user specified server is resolvable
if not options['skip_nameserver_check']:
check_ns_rec_resolvable(keys[0], entry_attrs['idnssoamname'],
self.log)
# show warning about --name-server option
context.show_warning_nameserver_option = True
else:
# user didn't specify SOA mname
if server in nameservers:
# current ipa server is authoritative nameserver in SOA record
entry_attrs['idnssoamname'] = [server]
else:
# a first DNS capable server is authoritative nameserver in SOA record
entry_attrs['idnssoamname'] = [nameservers[0]]
# all ipa DNS servers should be in NS zone record (as absolute domain name)
entry_attrs['nsrecord'] = nameservers
return dn
def execute(self, *keys, **options):
result = super(dnszone_add, self).execute(*keys, **options)
self._warning_deprecated_option(result, **options)
self.obj._warning_forwarding(result, **options)
self.obj._warning_name_server_option(result, context, **options)
self.obj._warning_fw_zone_is_not_effective(result, *keys, **options)
self.obj._warning_dnssec_master_is_not_installed(result, **options)
return result
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
# Add entry to realmdomains
# except for our own domain, reverse zones and root zone
zone = keys[0]
if (zone != DNSName(api.env.domain).make_absolute() and
not zone.is_reverse() and
zone != DNSName.root):
try:
self.api.Command['realmdomains_mod'](add_domain=unicode(zone),
force=True)
except (errors.EmptyModlist, errors.ValidationError):
pass
self.obj._rr_zone_postprocess(entry_attrs, **options)
return dn
@register()
class dnszone_del(DNSZoneBase_del):
__doc__ = _('Delete DNS zone (SOA record).')
msg_summary = _('Deleted DNS zone "%(value)s"')
def execute(self, *keys, **options):
result = super(dnszone_del, self).execute(*keys, **options)
nkeys = keys[-1] # we can delete more zones
for key in nkeys:
self.obj._warning_fw_zone_is_not_effective(result, key, **options)
return result
def post_callback(self, ldap, dn, *keys, **options):
super(dnszone_del, self).post_callback(ldap, dn, *keys, **options)
# Delete entry from realmdomains
# except for our own domain, reverse zone, and root zone
zone = keys[0].make_absolute()
if (zone != DNSName(api.env.domain).make_absolute() and
not zone.is_reverse() and zone != DNSName.root
):
try:
self.api.Command['realmdomains_mod'](
del_domain=unicode(zone), force=True)
except (errors.AttrValueNotFound, errors.ValidationError):
pass
return True
@register()
class dnszone_mod(DNSZoneBase_mod):
__doc__ = _('Modify DNS zone (SOA record).')
takes_options = DNSZoneBase_mod.takes_options + (
Flag('force',
label=_('Force'),
doc=_('Force nameserver change even if nameserver not in DNS'),
),
)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
if not _check_DN_objectclass(ldap, dn, self.obj.object_class):
self.obj.handle_not_found(*keys)
if 'idnssoamname' in entry_attrs:
nameserver = entry_attrs['idnssoamname']
if nameserver:
if not nameserver.is_empty() and not options['force']:
check_ns_rec_resolvable(keys[0], nameserver, self.log)
context.show_warning_nameserver_option = True
else:
# empty value, this option is required by ldap
raise errors.ValidationError(
name='name_server',
error=_(u"is required"))
return dn
def execute(self, *keys, **options):
result = super(dnszone_mod, self).execute(*keys, **options)
self.obj._warning_forwarding(result, **options)
self.obj._warning_name_server_option(result, context, **options)
self.obj._warning_dnssec_master_is_not_installed(result, **options)
self.obj._warning_ttl_changed_reload_needed(result, **options)
return result
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
dn = super(dnszone_mod, self).post_callback(ldap, dn, entry_attrs,
*keys, **options)
self.obj._rr_zone_postprocess(entry_attrs, **options)
return dn
@register()
class dnszone_find(DNSZoneBase_find):
__doc__ = _('Search for DNS zones (SOA records).')
takes_options = DNSZoneBase_find.takes_options + (
Flag('forward_only',
label=_('Forward zones only'),
cli_name='forward_only',
doc=_('Search for forward zones only'),
),
)
def pre_callback(self, ldap, filter, attrs_list, base_dn, scope, *args, **options):
assert isinstance(base_dn, DN)
filter, _base, _scope = super(dnszone_find, self).pre_callback(
ldap, filter, attrs_list, base_dn, scope, *args, **options)
if options.get('forward_only', False):
search_kw = {}
search_kw['idnsname'] = [revzone.ToASCII() for revzone in
REVERSE_DNS_ZONES.keys()]
rev_zone_filter = ldap.make_filter(search_kw,
rules=ldap.MATCH_NONE,
exact=False,
trailing_wildcard=False)
filter = ldap.combine_filters((rev_zone_filter, filter),
rules=ldap.MATCH_ALL)
return (filter, base_dn, scope)
def post_callback(self, ldap, entries, truncated, *args, **options):
truncated = super(dnszone_find, self).post_callback(ldap, entries,
truncated, *args,
**options)
for entry_attrs in entries:
self.obj._rr_zone_postprocess(entry_attrs, **options)
return truncated
@register()
class dnszone_show(DNSZoneBase_show):
__doc__ = _('Display information about a DNS zone (SOA record).')
def execute(self, *keys, **options):
result = super(dnszone_show, self).execute(*keys, **options)
self.obj._warning_forwarding(result, **options)
self.obj._warning_dnssec_master_is_not_installed(result, **options)
return result
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
dn = super(dnszone_show, self).post_callback(ldap, dn, entry_attrs,
*keys, **options)
self.obj._rr_zone_postprocess(entry_attrs, **options)
return dn
@register()
class dnszone_disable(DNSZoneBase_disable):
__doc__ = _('Disable DNS Zone.')
msg_summary = _('Disabled DNS zone "%(value)s"')
def execute(self, *keys, **options):
result = super(dnszone_disable, self).execute(*keys, **options)
self.obj._warning_fw_zone_is_not_effective(result, *keys, **options)
return result
@register()
class dnszone_enable(DNSZoneBase_enable):
__doc__ = _('Enable DNS Zone.')
msg_summary = _('Enabled DNS zone "%(value)s"')
def execute(self, *keys, **options):
result = super(dnszone_enable, self).execute(*keys, **options)
self.obj._warning_fw_zone_is_not_effective(result, *keys, **options)
return result
@register()
class dnszone_add_permission(DNSZoneBase_add_permission):
__doc__ = _('Add a permission for per-zone access delegation.')
@register()
class dnszone_remove_permission(DNSZoneBase_remove_permission):
__doc__ = _('Remove a permission for per-zone access delegation.')
@register()
class dnsrecord(LDAPObject):
"""
DNS record.
"""
parent_object = 'dnszone'
container_dn = api.env.container_dns
object_name = _('DNS resource record')
object_name_plural = _('DNS resource records')
object_class = ['top', 'idnsrecord']
possible_objectclasses = ['idnsTemplateObject']
permission_filter_objectclasses = ['idnsrecord']
default_attributes = ['idnsname'] + _record_attributes
rdn_is_primary_key = True
label = _('DNS Resource Records')
label_singular = _('DNS Resource Record')
takes_params = (
DNSNameParam('idnsname',
cli_name='name',
label=_('Record name'),
doc=_('Record name'),
primary_key=True,
),
Int('dnsttl?',
cli_name='ttl',
label=_('Time to live'),
doc=_('Time to live'),
),
StrEnum('dnsclass?',
# Deprecated
cli_name='class',
flags=['no_option'],
values=_record_classes,
),
) + _dns_record_options
structured_flag = Flag('structured',
label=_('Structured'),
doc=_('Parse all raw DNS records and return them in a structured way'),
)
def _dsrecord_pre_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
dsrecords = entry_attrs.get('dsrecord')
if dsrecords and self.is_pkey_zone_record(*keys):
raise errors.ValidationError(
name='dsrecord',
error=unicode(_('DS record must not be in zone apex (RFC 4035 section 2.4)')))
def _nsrecord_pre_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
nsrecords = entry_attrs.get('nsrecord')
if options.get('force', False) or nsrecords is None:
return
for nsrecord in nsrecords:
check_ns_rec_resolvable(keys[0], DNSName(nsrecord), self.log)
def _idnsname_pre_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
if keys[-1].is_absolute():
if keys[-1].is_subdomain(keys[-2]):
entry_attrs['idnsname'] = [keys[-1].relativize(keys[-2])]
elif not self.is_pkey_zone_record(*keys):
raise errors.ValidationError(name='idnsname',
error=unicode(_('out-of-zone data: record name must '
'be a subdomain of the zone or a '
'relative name')))
# dissallowed wildcard (RFC 4592 section 4)
no_wildcard_rtypes = ['DNAME', 'DS', 'NS']
if (keys[-1].is_wild() and
any(entry_attrs.get(record_name_format % r.lower())
for r in no_wildcard_rtypes)
):
raise errors.ValidationError(
name='idnsname',
error=(_('owner of %(types)s records '
'should not be a wildcard domain name (RFC 4592 section 4)') %
{'types': ', '.join(no_wildcard_rtypes)}
)
)
def _ptrrecord_pre_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
ptrrecords = entry_attrs.get('ptrrecord')
if ptrrecords is None:
return
zone = keys[-2]
if self.is_pkey_zone_record(*keys):
addr = _dns_zone_record
else:
addr = keys[-1]
zone_len = 0
for valid_zone in REVERSE_DNS_ZONES:
if zone.is_subdomain(valid_zone):
zone = zone.relativize(valid_zone)
zone_name = valid_zone
zone_len = REVERSE_DNS_ZONES[valid_zone]
if not zone_len:
allowed_zones = ', '.join([unicode(revzone) for revzone in
REVERSE_DNS_ZONES.keys()])
raise errors.ValidationError(name='ptrrecord',
error=unicode(_('Reverse zone for PTR record should be a sub-zone of one the following fully qualified domains: %s') % allowed_zones))
addr_len = len(addr.labels)
# Classless zones (0/25.0.0.10.in-addr.arpa.) -> skip check
# zone has to be checked without reverse domain suffix (in-addr.arpa.)
for sign in ('/', '-'):
for name in (zone, addr):
for label in name.labels:
if sign in label:
return
ip_addr_comp_count = addr_len + len(zone.labels)
if ip_addr_comp_count != zone_len:
raise errors.ValidationError(name='ptrrecord',
error=unicode(_('Reverse zone %(name)s requires exactly '
'%(count)d IP address components, '
'%(user_count)d given')
% dict(name=zone_name,
count=zone_len,
user_count=ip_addr_comp_count)))
def run_precallback_validators(self, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
ldap = self.api.Backend.ldap2
for rtype in entry_attrs.keys():
rtype_cb = getattr(self, '_%s_pre_callback' % rtype, None)
if rtype_cb:
rtype_cb(ldap, dn, entry_attrs, *keys, **options)
def is_pkey_zone_record(self, *keys):
assert isinstance(keys[-1], DNSName)
assert isinstance(keys[-2], DNSName)
idnsname = keys[-1]
zonename = keys[-2]
if idnsname.is_empty() or idnsname == zonename:
return True
return False
def check_zone(self, zone, **options):
"""
Check if zone exists and if is master zone
"""
parent_object = self.api.Object[self.parent_object]
dn = parent_object.get_dn(zone, **options)
ldap = self.api.Backend.ldap2
try:
entry = ldap.get_entry(dn, ['objectclass'])
except errors.NotFound:
parent_object.handle_not_found(zone)
else:
# only master zones can contain records
if 'idnszone' not in [x.lower() for x in entry.get('objectclass', [])]:
raise errors.ValidationError(
name='dnszoneidnsname',
error=_(u'only master zones can contain records')
)
return dn
def get_dn(self, *keys, **options):
if not dns_container_exists(self.api.Backend.ldap2):
raise errors.NotFound(reason=_('DNS is not configured'))
dn = self.check_zone(keys[-2], **options)
if self.is_pkey_zone_record(*keys):
return dn
#Make RR name relative if possible
relative_name = keys[-1].relativize(keys[-2]).ToASCII()
keys = keys[:-1] + (relative_name,)
return super(dnsrecord, self).get_dn(*keys, **options)
def attr_to_cli(self, attr):
cliname = get_record_rrtype(attr)
if not cliname:
cliname = attr
return cliname
def get_dns_masters(self):
ldap = self.api.Backend.ldap2
base_dn = DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'), self.api.env.basedn)
ldap_filter = '(&(objectClass=ipaConfigObject)(cn=DNS))'
dns_masters = []
try:
entries = ldap.find_entries(filter=ldap_filter, base_dn=base_dn)[0]
for entry in entries:
try:
master = entry.dn[1]['cn']
dns_masters.append(master)
except (IndexError, KeyError):
pass
except errors.NotFound:
return []
return dns_masters
def get_record_entry_attrs(self, entry_attrs):
entry_attrs = entry_attrs.copy()
for attr in entry_attrs.keys():
if attr not in self.params or self.params[attr].primary_key:
del entry_attrs[attr]
return entry_attrs
def postprocess_record(self, record, **options):
if options.get('structured', False):
for attr in record.keys():
# attributes in LDAPEntry may not be normalized
attr = attr.lower()
try:
param = self.params[attr]
except KeyError:
continue
if not isinstance(param, DNSRecord):
continue
parts_params = param.get_parts()
for dnsvalue in record[attr]:
dnsentry = {
u'dnstype' : unicode(param.rrtype),
u'dnsdata' : dnsvalue
}
values = param._get_part_values(dnsvalue)
if values is None:
continue
for val_id, val in enumerate(values):
if val is not None:
#decode IDN
if isinstance(parts_params[val_id], DNSNameParam):
dnsentry[parts_params[val_id].name] = \
_dns_name_to_string(val,
options.get('raw', False))
else:
dnsentry[parts_params[val_id].name] = val
record.setdefault('dnsrecords', []).append(dnsentry)
del record[attr]
elif not options.get('raw', False):
#Decode IDN ACE form to Unicode, raw records are passed directly from LDAP
_records_idn_postprocess(record, **options)
def updated_rrattrs(self, old_entry, entry_attrs):
"""Returns updated RR attributes
"""
rrattrs = {}
if old_entry is not None:
old_rrattrs = dict((key, value) for key, value in old_entry.items()
if key in self.params and
isinstance(self.params[key], DNSRecord))
rrattrs.update(old_rrattrs)
new_rrattrs = dict((key, value) for key, value in entry_attrs.items()
if key in self.params and
isinstance(self.params[key], DNSRecord))
rrattrs.update(new_rrattrs)
return rrattrs
def check_record_type_collisions(self, keys, rrattrs):
# Test that only allowed combination of record types was created
# CNAME record validation
cnames = rrattrs.get('cnamerecord')
if cnames is not None:
if len(cnames) > 1:
raise errors.ValidationError(name='cnamerecord',
error=_('only one CNAME record is allowed per name '
'(RFC 2136, section 1.1.5)'))
if any(rrvalue is not None
and rrattr != 'cnamerecord'
for rrattr, rrvalue in rrattrs.items()):
raise errors.ValidationError(name='cnamerecord',
error=_('CNAME record is not allowed to coexist '
'with any other record (RFC 1034, section 3.6.2)'))
# DNAME record validation
dnames = rrattrs.get('dnamerecord')
if dnames is not None:
if len(dnames) > 1:
raise errors.ValidationError(name='dnamerecord',
error=_('only one DNAME record is allowed per name '
'(RFC 6672, section 2.4)'))
# DNAME must not coexist with CNAME, but this is already checked earlier
# NS record validation
# NS record can coexist only with A, AAAA, DS, and other NS records (except zone apex)
# RFC 2181 section 6.1,
allowed_records = ['AAAA', 'A', 'DS', 'NS']
nsrecords = rrattrs.get('nsrecord')
if nsrecords and not self.is_pkey_zone_record(*keys):
for r_type in _record_types:
if (r_type not in allowed_records
and rrattrs.get(record_name_format % r_type.lower())
):
raise errors.ValidationError(
name='nsrecord',
error=_('NS record is not allowed to coexist with an '
'%(type)s record except when located in a '
'zone root record (RFC 2181, section 6.1)') %
{'type': r_type})
def check_record_type_dependencies(self, keys, rrattrs):
# Test that all record type dependencies are satisfied
# DS record validation
# DS record requires to coexists with NS record
dsrecords = rrattrs.get('dsrecord')
nsrecords = rrattrs.get('nsrecord')
# DS record cannot be in zone apex, checked in pre-callback validators
if dsrecords and not nsrecords:
raise errors.ValidationError(
name='dsrecord',
error=_('DS record requires to coexist with an '
'NS record (RFC 4592 section 4.6, RFC 4035 section 2.4)'))
def _entry2rrsets(self, entry_attrs, dns_name, dns_domain):
'''Convert entry_attrs to a dictionary {rdtype: rrset}.
:returns:
None if entry_attrs is None
{rdtype: None} if RRset of given type is empty
{rdtype: RRset} if RRset of given type is non-empty
'''
ldap_rrsets = {}
if not entry_attrs:
# all records were deleted => name should not exist in DNS
return None
for attr, value in entry_attrs.items():
rrtype = get_record_rrtype(attr)
if not rrtype:
continue
rdtype = dns.rdatatype.from_text(rrtype)
if not value:
ldap_rrsets[rdtype] = None # RRset is empty
continue
try:
# TTL here can be arbitrary value because it is ignored
# during comparison
ldap_rrset = dns.rrset.from_text(
dns_name, 86400, dns.rdataclass.IN, rdtype,
*[str(v) for v in value])
# make sure that all names are absolute so RRset
# comparison will work
for ldap_rr in ldap_rrset:
ldap_rr.choose_relativity(origin=dns_domain,
relativize=False)
ldap_rrsets[rdtype] = ldap_rrset
except dns.exception.SyntaxError as e:
self.log.error('DNS syntax error: %s %s %s: %s', dns_name,
dns.rdatatype.to_text(rdtype), value, e)
raise
return ldap_rrsets
def wait_for_modified_attr(self, ldap_rrset, rdtype, dns_name):
'''Wait until DNS resolver returns up-to-date answer for given RRset
or until the maximum number of attempts is reached.
Number of attempts is controlled by self.api.env['wait_for_dns'].
:param ldap_rrset:
None if given rdtype should not exist or
dns.rrset.RRset to match against data in DNS.
:param dns_name: FQDN to query
:type dns_name: dns.name.Name
:return: None if data in DNS and LDAP match
:raises errors.DNSDataMismatch: if data in DNS and LDAP doesn't match
:raises dns.exception.DNSException: if DNS resolution failed
'''
resolver = dns.resolver.Resolver()
resolver.set_flags(0) # disable recursion (for NS RR checks)
max_attempts = int(self.api.env['wait_for_dns'])
warn_attempts = max_attempts // 2
period = 1 # second
attempt = 0
log_fn = self.log.debug
log_fn('querying DNS server: expecting answer {%s}', ldap_rrset)
wait_template = 'waiting for DNS answer {%s}: got {%s} (attempt %s); '\
'waiting %s seconds before next try'
while attempt < max_attempts:
if attempt >= warn_attempts:
log_fn = self.log.warning
attempt += 1
try:
dns_answer = resolver.query(dns_name, rdtype,
dns.rdataclass.IN,
raise_on_no_answer=False)
dns_rrset = None
if rdtype == _NS:
# NS records can be in Authority section (sometimes)
dns_rrset = dns_answer.response.get_rrset(
dns_answer.response.authority, dns_name, _IN, rdtype)
if not dns_rrset:
# Look for NS and other data in Answer section
dns_rrset = dns_answer.rrset
if dns_rrset == ldap_rrset:
log_fn('DNS answer matches expectations (attempt %s)',
attempt)
return
log_msg = wait_template % (ldap_rrset, dns_answer.response,
attempt, period)
except (dns.resolver.NXDOMAIN,
dns.resolver.YXDOMAIN,
dns.resolver.NoNameservers,
dns.resolver.Timeout) as e:
if attempt >= max_attempts:
raise
else:
log_msg = wait_template % (ldap_rrset, type(e), attempt,
period)
log_fn(log_msg)
time.sleep(period)
# Maximum number of attempts was reached
else:
raise errors.DNSDataMismatch(expected=ldap_rrset, got=dns_rrset)
def wait_for_modified_attrs(self, entry_attrs, dns_name, dns_domain):
'''Wait until DNS resolver returns up-to-date answer for given entry
or until the maximum number of attempts is reached.
:param entry_attrs:
None if the entry was deleted from LDAP or
LDAPEntry instance containing at least all modified attributes.
:param dns_name: FQDN
:type dns_name: dns.name.Name
:raises errors.DNSDataMismatch: if data in DNS and LDAP doesn't match
'''
# represent data in LDAP as dictionary rdtype => rrset
ldap_rrsets = self._entry2rrsets(entry_attrs, dns_name, dns_domain)
nxdomain = ldap_rrsets is None
if nxdomain:
# name should not exist => ask for A record and check result
ldap_rrsets = {dns.rdatatype.from_text('A'): None}
for rdtype, ldap_rrset in ldap_rrsets.items():
try:
self.wait_for_modified_attr(ldap_rrset, rdtype, dns_name)
except dns.resolver.NXDOMAIN as e:
if nxdomain:
continue
else:
e = errors.DNSDataMismatch(expected=ldap_rrset,
got="NXDOMAIN")
self.log.error(e)
raise e
except dns.resolver.NoNameservers as e:
# Do not raise exception if we have got SERVFAILs.
# Maybe the user has created an invalid zone intentionally.
self.log.warning('waiting for DNS answer {%s}: got {%s}; '
'ignoring', ldap_rrset, type(e))
continue
except dns.exception.DNSException as e:
err_desc = str(type(e))
err_str = str(e)
if err_str:
err_desc += ": %s" % err_str
e = errors.DNSDataMismatch(expected=ldap_rrset, got=err_desc)
self.log.error(e)
raise e
def wait_for_modified_entries(self, entries):
'''Call wait_for_modified_attrs for all entries in given dict.
:param entries:
Dict {(dns_domain, dns_name): entry_for_wait_for_modified_attrs}
'''
for entry_name, entry in entries.items():
dns_domain = entry_name[0]
dns_name = entry_name[1].derelativize(dns_domain)
self.wait_for_modified_attrs(entry, dns_name, dns_domain)
def warning_if_ns_change_cause_fwzone_ineffective(self, result, *keys,
**options):
"""Detect if NS record change can make forward zones ineffective due
missing delegation. Run after parent's execute method.
"""
record_name_absolute = keys[-1]
zone = keys[-2]
if not record_name_absolute.is_absolute():
record_name_absolute = record_name_absolute.derelativize(zone)
affected_fw_zones, _truncated = _find_subtree_forward_zones_ldap(
self.api, record_name_absolute)
if not affected_fw_zones:
return
for fwzone in affected_fw_zones:
_add_warning_fw_zone_is_not_effective(self.api, result, fwzone,
options['version'])
def warning_suspicious_relative_name(self, result, *keys, **options):
"""Detect if zone name is suffix of relative record name and warn.
Zone name: test.zone.
Relative name: record.test.zone
"""
record_name = keys[-1]
zone = keys[-2]
if not record_name.is_absolute() and record_name.is_subdomain(
zone.relativize(DNSName.root)):
messages.add_message(
options['version'],
result,
messages.DNSSuspiciousRelativeName(record=record_name,
zone=zone,
fqdn=record_name + zone)
)
# Make DNS record types available as objects in the API.
# This is used by the CLI to get otherwise unavailable attributes of record
# parts.
for param in _dns_records:
register()(
type(
'dns{}record'.format(param.rrtype.lower()),
(Object,),
dict(
takes_params=(param.parts or ()) + (param.extra or ()),
)
)
)
@register()
class dnsrecord_split_parts(Command):
NO_CLI = True
takes_args = (
Str('name'),
Str('value'),
)
def execute(self, name, value, *args, **options):
result = self.api.Object.dnsrecord.params[name]._get_part_values(value)
return dict(result=result)
@register()
class dnsrecord_add(LDAPCreate):
__doc__ = _('Add new DNS resource record.')
no_option_msg = 'No options to add a specific record provided.\n' \
"Command help may be consulted for all supported record types."
takes_options = LDAPCreate.takes_options + (
Flag('force',
label=_('Force'),
flags=['no_option', 'no_output'],
doc=_('force NS record creation even if its hostname is not in DNS'),
),
dnsrecord.structured_flag,
)
def args_options_2_entry(self, *keys, **options):
has_cli_options(self, options, self.no_option_msg)
return super(dnsrecord_add, self).args_options_2_entry(*keys, **options)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
precallback_attrs = []
processed_attrs = []
for option in options:
try:
param = self.params[option]
except KeyError:
continue
rrparam = get_rrparam_from_part(self, option)
if rrparam is None:
continue
if get_part_rrtype(param.name):
if rrparam.name in processed_attrs:
# this record was already entered
continue
if rrparam.name in entry_attrs:
# this record is entered both via parts and raw records
raise errors.ValidationError(name=param.cli_name or param.name,
error=_('Raw value of a DNS record was already set by "%(name)s" option') \
% dict(name=rrparam.cli_name or rrparam.name))
parts = rrparam.get_parts_from_kw(options)
dnsvalue = [rrparam._convert_scalar(parts)]
entry_attrs[rrparam.name] = dnsvalue
processed_attrs.append(rrparam.name)
continue
if get_extra_rrtype(param.name):
# do not run precallback for unset flags
if isinstance(param, Flag) and not options[option]:
continue
# extra option is passed, run per-type pre_callback for given RR type
precallback_attrs.append(rrparam.name)
# Run pre_callback validators
self.obj.run_precallback_validators(dn, entry_attrs, *keys, **options)
# run precallback also for all new RR type attributes in entry_attrs
for attr in entry_attrs.keys():
try:
param = self.params[attr]
except KeyError:
continue
if not isinstance(param, DNSRecord):
continue
precallback_attrs.append(attr)
precallback_attrs = list(set(precallback_attrs))
for attr in precallback_attrs:
# run per-type
try:
param = self.params[attr]
except KeyError:
continue
param.dnsrecord_add_pre_callback(ldap, dn, entry_attrs, attrs_list, *keys, **options)
# Store all new attrs so that DNSRecord post callback is called for
# new attributes only and not for all attributes in the LDAP entry
setattr(context, 'dnsrecord_precallback_attrs', precallback_attrs)
# We always want to retrieve all DNS record attributes to test for
# record type collisions (#2601)
try:
old_entry = ldap.get_entry(dn, _record_attributes)
except errors.NotFound:
old_entry = None
else:
for attr in entry_attrs.keys():
if attr not in _record_attributes:
continue
if entry_attrs[attr] is None:
entry_attrs[attr] = []
if not isinstance(entry_attrs[attr], (tuple, list)):
vals = [entry_attrs[attr]]
else:
vals = list(entry_attrs[attr])
entry_attrs[attr] = list(set(old_entry.get(attr, []) + vals))
rrattrs = self.obj.updated_rrattrs(old_entry, entry_attrs)
self.obj.check_record_type_dependencies(keys, rrattrs)
self.obj.check_record_type_collisions(keys, rrattrs)
context.dnsrecord_entry_mods = getattr(context, 'dnsrecord_entry_mods',
{})
context.dnsrecord_entry_mods[(keys[0], keys[1])] = entry_attrs.copy()
return dn
def execute(self, *keys, **options):
result = super(dnsrecord_add, self).execute(*keys, **options)
self.obj.warning_suspicious_relative_name(result, *keys, **options)
return result
def exc_callback(self, keys, options, exc, call_func, *call_args, **call_kwargs):
if call_func.__name__ == 'add_entry':
if isinstance(exc, errors.DuplicateEntry):
# A new record is being added to existing LDAP DNS object
# Update can be safely run as old record values has been
# already merged in pre_callback
ldap = self.obj.backend
entry_attrs = self.obj.get_record_entry_attrs(call_args[0])
update = ldap.get_entry(entry_attrs.dn, list(entry_attrs))
update.update(entry_attrs)
ldap.update_entry(update, **call_kwargs)
return
raise exc
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
for attr in getattr(context, 'dnsrecord_precallback_attrs', []):
param = self.params[attr]
param.dnsrecord_add_post_callback(ldap, dn, entry_attrs, *keys, **options)
if self.obj.is_pkey_zone_record(*keys):
entry_attrs[self.obj.primary_key.name] = [_dns_zone_record]
self.obj.postprocess_record(entry_attrs, **options)
if self.api.env['wait_for_dns']:
self.obj.wait_for_modified_entries(context.dnsrecord_entry_mods)
return dn
@register()
class dnsrecord_mod(LDAPUpdate):
__doc__ = _('Modify a DNS resource record.')
no_option_msg = 'No options to modify a specific record provided.'
takes_options = LDAPUpdate.takes_options + (
dnsrecord.structured_flag,
)
def args_options_2_entry(self, *keys, **options):
has_cli_options(self, options, self.no_option_msg, True)
return super(dnsrecord_mod, self).args_options_2_entry(*keys, **options)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
if options.get('rename') and self.obj.is_pkey_zone_record(*keys):
# zone rename is not allowed
raise errors.ValidationError(name='rename',
error=_('DNS zone root record cannot be renamed'))
# check if any attr should be updated using structured instead of replaced
# format is recordname : (old_value, new_parts)
updated_attrs = {}
for param in iterate_rrparams_by_parts(self, options, skip_extra=True):
parts = param.get_parts_from_kw(options, raise_on_none=False)
if parts is None:
# old-style modification
continue
old_value = entry_attrs.get(param.name)
if not old_value:
raise errors.RequirementError(name=param.name)
if isinstance(old_value, (tuple, list)):
if len(old_value) > 1:
raise errors.ValidationError(name=param.name,
error=_('DNS records can be only updated one at a time'))
old_value = old_value[0]
updated_attrs[param.name] = (old_value, parts)
# Run pre_callback validators
self.obj.run_precallback_validators(dn, entry_attrs, *keys, **options)
# current entry is needed in case of per-dns-record-part updates and
# for record type collision check
try:
old_entry = ldap.get_entry(dn, _record_attributes)
except errors.NotFound:
self.obj.handle_not_found(*keys)
if updated_attrs:
for attr in updated_attrs:
param = self.params[attr]
old_dnsvalue, new_parts = updated_attrs[attr]
if old_dnsvalue not in old_entry.get(attr, []):
attr_name = unicode(param.label or param.name)
raise errors.AttrValueNotFound(attr=attr_name,
value=old_dnsvalue)
old_entry[attr].remove(old_dnsvalue)
old_parts = param._get_part_values(old_dnsvalue)
modified_parts = tuple(part if part is not None else old_parts[part_id] \
for part_id,part in enumerate(new_parts))
new_dnsvalue = [param._convert_scalar(modified_parts)]
entry_attrs[attr] = list(set(old_entry[attr] + new_dnsvalue))
rrattrs = self.obj.updated_rrattrs(old_entry, entry_attrs)
self.obj.check_record_type_dependencies(keys, rrattrs)
self.obj.check_record_type_collisions(keys, rrattrs)
context.dnsrecord_entry_mods = getattr(context, 'dnsrecord_entry_mods',
{})
context.dnsrecord_entry_mods[(keys[0], keys[1])] = entry_attrs.copy()
return dn
def execute(self, *keys, **options):
result = super(dnsrecord_mod, self).execute(*keys, **options)
# remove if empty
if not self.obj.is_pkey_zone_record(*keys):
rename = options.get('rename')
if rename is not None:
keys = keys[:-1] + (rename,)
dn = self.obj.get_dn(*keys, **options)
ldap = self.obj.backend
old_entry = ldap.get_entry(dn, _record_attributes)
del_all = True
for attr in old_entry.keys():
if old_entry[attr]:
del_all = False
break
if del_all:
result = self.obj.methods.delentry(*keys,
version=options['version'])
# we need to modify delete result to match mod output type
# only one value is expected, not a list
if client_has_capability(options['version'], 'primary_key_types'):
assert len(result['value']) == 1
result['value'] = result['value'][0]
# indicate that entry was deleted
context.dnsrecord_entry_mods[(keys[0], keys[1])] = None
if self.api.env['wait_for_dns']:
self.obj.wait_for_modified_entries(context.dnsrecord_entry_mods)
if 'nsrecord' in options:
self.obj.warning_if_ns_change_cause_fwzone_ineffective(result,
*keys,
**options)
return result
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
if self.obj.is_pkey_zone_record(*keys):
entry_attrs[self.obj.primary_key.name] = [_dns_zone_record]
self.obj.postprocess_record(entry_attrs, **options)
return dn
@register()
class dnsrecord_delentry(LDAPDelete):
"""
Delete DNS record entry.
"""
msg_summary = _('Deleted record "%(value)s"')
NO_CLI = True
@register()
class dnsrecord_del(LDAPUpdate):
__doc__ = _('Delete DNS resource record.')
has_output = output.standard_multi_delete
no_option_msg = _('Neither --del-all nor options to delete a specific record provided.\n'\
"Command help may be consulted for all supported record types.")
takes_options = (
Flag('del_all',
default=False,
label=_('Delete all associated records'),
),
dnsrecord.structured_flag,
Flag(
'raw',
exclude=('cli', 'webui'),
),
)
def get_options(self):
for option in super(dnsrecord_del, self).get_options():
if get_part_rrtype(option.name) or get_extra_rrtype(option.name):
continue
elif option.name in ('rename', ):
# options only valid for dnsrecord-mod
continue
elif isinstance(option, DNSRecord):
yield option.clone(option_group=None)
continue
yield option
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
try:
old_entry = ldap.get_entry(dn, _record_attributes)
except errors.NotFound:
self.obj.handle_not_found(*keys)
for attr in entry_attrs.keys():
if attr not in _record_attributes:
continue
if not isinstance(entry_attrs[attr], (tuple, list)):
vals = [entry_attrs[attr]]
else:
vals = entry_attrs[attr]
for val in vals:
try:
old_entry[attr].remove(val)
except (KeyError, ValueError):
try:
param = self.params[attr]
attr_name = unicode(param.label or param.name)
except Exception:
attr_name = attr
raise errors.AttrValueNotFound(attr=attr_name, value=val)
entry_attrs[attr] = list(set(old_entry[attr]))
rrattrs = self.obj.updated_rrattrs(old_entry, entry_attrs)
self.obj.check_record_type_dependencies(keys, rrattrs)
del_all = False
if not self.obj.is_pkey_zone_record(*keys):
record_found = False
for attr in old_entry.keys():
if old_entry[attr]:
record_found = True
break
del_all = not record_found
# set del_all flag in context
# when the flag is enabled, the entire DNS record object is deleted
# in a post callback
context.del_all = del_all
context.dnsrecord_entry_mods = getattr(context, 'dnsrecord_entry_mods',
{})
context.dnsrecord_entry_mods[(keys[0], keys[1])] = entry_attrs.copy()
return dn
def execute(self, *keys, **options):
if options.get('del_all', False):
if self.obj.is_pkey_zone_record(*keys):
raise errors.ValidationError(
name='del_all',
error=_('Zone record \'%s\' cannot be deleted') \
% _dns_zone_record
)
result = self.obj.methods.delentry(*keys,
version=options['version'])
if self.api.env['wait_for_dns']:
entries = {(keys[0], keys[1]): None}
self.obj.wait_for_modified_entries(entries)
else:
result = super(dnsrecord_del, self).execute(*keys, **options)
result['value'] = pkey_to_value([keys[-1]], options)
if getattr(context, 'del_all', False) and not \
self.obj.is_pkey_zone_record(*keys):
result = self.obj.methods.delentry(*keys,
version=options['version'])
context.dnsrecord_entry_mods[(keys[0], keys[1])] = None
if self.api.env['wait_for_dns']:
self.obj.wait_for_modified_entries(context.dnsrecord_entry_mods)
if 'nsrecord' in options or options.get('del_all', False):
self.obj.warning_if_ns_change_cause_fwzone_ineffective(result,
*keys,
**options)
return result
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
if self.obj.is_pkey_zone_record(*keys):
entry_attrs[self.obj.primary_key.name] = [_dns_zone_record]
self.obj.postprocess_record(entry_attrs, **options)
return dn
def args_options_2_entry(self, *keys, **options):
has_cli_options(self, options, self.no_option_msg)
return super(dnsrecord_del, self).args_options_2_entry(*keys, **options)
@register()
class dnsrecord_show(LDAPRetrieve):
__doc__ = _('Display DNS resource.')
takes_options = LDAPRetrieve.takes_options + (
dnsrecord.structured_flag,
)
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
if self.obj.is_pkey_zone_record(*keys):
entry_attrs[self.obj.primary_key.name] = [_dns_zone_record]
self.obj.postprocess_record(entry_attrs, **options)
return dn
@register()
class dnsrecord_find(LDAPSearch):
__doc__ = _('Search for DNS resources.')
takes_options = LDAPSearch.takes_options + (
dnsrecord.structured_flag,
)
def get_options(self):
for option in super(dnsrecord_find, self).get_options():
if get_part_rrtype(option.name) or get_extra_rrtype(option.name):
continue
elif isinstance(option, DNSRecord):
yield option.clone(option_group=None)
continue
yield option
def pre_callback(self, ldap, filter, attrs_list, base_dn, scope,
dnszoneidnsname, *args, **options):
assert isinstance(base_dn, DN)
# validate if zone is master zone
self.obj.check_zone(dnszoneidnsname, **options)
filter = _create_idn_filter(self, ldap, *args, **options)
return (filter, base_dn, ldap.SCOPE_SUBTREE)
def post_callback(self, ldap, entries, truncated, *args, **options):
if entries:
zone_obj = self.api.Object[self.obj.parent_object]
zone_dn = zone_obj.get_dn(args[0])
if entries[0].dn == zone_dn:
entries[0][zone_obj.primary_key.name] = [_dns_zone_record]
for entry in entries:
self.obj.postprocess_record(entry, **options)
return truncated
@register()
class dns_resolve(Command):
__doc__ = _('Resolve a host name in DNS. (Deprecated)')
NO_CLI = True
has_output = output.simple_value
msg_summary = _('Found \'%(value)s\'')
takes_args = (
Str('hostname',
label=_('Hostname (FQDN)'),
),
)
def execute(self, *args, **options):
query=args[0]
try:
verify_host_resolvable(query)
except errors.DNSNotARecordError:
raise errors.NotFound(
reason=_('Host \'%(host)s\' not found') % {'host': query}
)
result = dict(result=True, value=query)
messages.add_message(
options['version'], result,
messages.CommandDeprecatedWarning(
command='dns-resolve',
additional_info='The command may return an unexpected result, '
'the resolution of the DNS domain is done on '
'a randomly chosen IPA server.'
)
)
return result
@register()
class dns_is_enabled(Command):
"""
Checks if any of the servers has the DNS service enabled.
"""
NO_CLI = True
has_output = output.standard_value
base_dn = DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'), api.env.basedn)
filter = '(&(objectClass=ipaConfigObject)(cn=DNS))'
def execute(self, *args, **options):
ldap = self.api.Backend.ldap2
dns_enabled = False
try:
ldap.find_entries(filter=self.filter, base_dn=self.base_dn)
dns_enabled = True
except errors.EmptyResult:
dns_enabled = False
return dict(result=dns_enabled, value=pkey_to_value(None, options))
@register()
class dnsconfig(LDAPObject):
"""
DNS global configuration object
"""
object_name = _('DNS configuration options')
default_attributes = [
'idnsforwardpolicy', 'idnsforwarders', 'idnsallowsyncptr'
]
label = _('DNS Global Configuration')
label_singular = _('DNS Global Configuration')
takes_params = (
Str('idnsforwarders*',
validate_bind_forwarder,
cli_name='forwarder',
label=_('Global forwarders'),
doc=_('Global forwarders. A custom port can be specified for each '
'forwarder using a standard format "IP_ADDRESS port PORT"'),
),
StrEnum('idnsforwardpolicy?',
cli_name='forward_policy',
label=_('Forward policy'),
doc=_('Global forwarding policy. Set to "none" to disable '
'any configured global forwarders.'),
values=(u'only', u'first', u'none'),
),
Bool('idnsallowsyncptr?',
cli_name='allow_sync_ptr',
label=_('Allow PTR sync'),
doc=_('Allow synchronization of forward (A, AAAA) and reverse (PTR) records'),
),
Int('idnszonerefresh?',
deprecated=True,
cli_name='zone_refresh',
label=_('Zone refresh interval'),
doc=_('An interval between regular polls of the name server for new DNS zones'),
minvalue=0,
flags={'no_option'},
),
Int('ipadnsversion?', # available only in installer/upgrade
label=_('IPA DNS version'),
),
Str(
'dns_server_server*',
label=_('IPA DNS servers'),
doc=_('List of IPA masters configured as DNS servers'),
flags={'virtual_attribute', 'no_create', 'no_update'}
),
Str(
'dnssec_key_master_server?',
label=_('IPA DNSSec key master'),
doc=_('IPA server configured as DNSSec key master'),
flags={'virtual_attribute', 'no_create', 'no_update'}
)
)
managed_permissions = {
'System: Write DNS Configuration': {
'non_object': True,
'ipapermright': {'write'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('cn=dns', api.env.basedn),
'ipapermtargetfilter': ['(objectclass=idnsConfigObject)'],
'ipapermdefaultattr': {
'idnsallowsyncptr', 'idnsforwarders', 'idnsforwardpolicy',
'idnspersistentsearch', 'idnszonerefresh'
},
'replaces': [
'(targetattr = "idnsforwardpolicy || idnsforwarders || idnsallowsyncptr || idnszonerefresh || idnspersistentsearch")(target = "ldap:///cn=dns,$SUFFIX")(version 3.0;acl "permission:Write DNS Configuration";allow (write) groupdn = "ldap:///cn=Write DNS Configuration,cn=permissions,cn=pbac,$SUFFIX";)',
],
'default_privileges': {'DNS Administrators', 'DNS Servers'},
},
'System: Read DNS Configuration': {
'non_object': True,
'ipapermright': {'read'},
'ipapermlocation': api.env.basedn,
'ipapermtarget': DN('cn=dns', api.env.basedn),
'ipapermtargetfilter': ['(objectclass=idnsConfigObject)'],
'ipapermdefaultattr': {
'objectclass',
'idnsallowsyncptr', 'idnsforwarders', 'idnsforwardpolicy',
'idnspersistentsearch', 'idnszonerefresh', 'ipadnsversion'
},
'default_privileges': {'DNS Administrators', 'DNS Servers'},
},
}
def get_dn(self, *keys, **kwargs):
if not dns_container_exists(self.api.Backend.ldap2):
raise errors.NotFound(reason=_('DNS is not configured'))
return DN(api.env.container_dns, api.env.basedn)
def get_dnsconfig(self, ldap):
entry = ldap.get_entry(self.get_dn(), None)
return entry
def postprocess_result(self, result):
is_config_empty = not any(
param.name in result['result'] for param in self.params() if
u'virtual_attribute' not in param.flags
)
if is_config_empty:
result['summary'] = unicode(_('Global DNS configuration is empty'))
def show_servroles_attributes(self, entry_attrs, **options):
if options.get('raw', False):
return
backend = self.api.Backend.serverroles
entry_attrs.update(
backend.config_retrieve("DNS server")
)
@register()
class dnsconfig_mod(LDAPUpdate):
__doc__ = _('Modify global DNS configuration.')
def get_options(self):
"""hide ipadnsversion outside of installer/upgrade"""
for option in super(dnsconfig_mod, self).get_options():
if option.name == 'ipadnsversion':
option = option.clone(include=('installer', 'updates'))
yield option
def execute(self, *keys, **options):
# test dnssec forwarders
forwarders = options.get('idnsforwarders')
result = super(dnsconfig_mod, self).execute(*keys, **options)
self.obj.postprocess_result(result)
# this check makes sense only when resulting forwarders are non-empty
if result['result'].get('idnsforwarders'):
fwzone = DNSName('.')
_add_warning_fw_policy_conflict_aez(result, fwzone, **options)
if forwarders:
# forwarders were changed
for forwarder in forwarders:
try:
validate_dnssec_global_forwarder(forwarder, log=self.log)
except DNSSECSignatureMissingError as e:
messages.add_message(
options['version'],
result, messages.DNSServerDoesNotSupportDNSSECWarning(
server=forwarder, error=e,
)
)
except EDNS0UnsupportedError as e:
messages.add_message(
options['version'],
result, messages.DNSServerDoesNotSupportEDNS0Warning(
server=forwarder, error=e,
)
)
except UnresolvableRecordError as e:
messages.add_message(
options['version'],
result, messages.DNSServerValidationWarning(
server=forwarder, error=e
)
)
return result
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
self.obj.show_servroles_attributes(entry_attrs, **options)
return dn
@register()
class dnsconfig_show(LDAPRetrieve):
__doc__ = _('Show the current global DNS configuration.')
def execute(self, *keys, **options):
result = super(dnsconfig_show, self).execute(*keys, **options)
self.obj.postprocess_result(result)
return result
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
self.obj.show_servroles_attributes(entry_attrs, **options)
return dn
@register()
class dnsforwardzone(DNSZoneBase):
"""
DNS Forward zone, container for resource records.
"""
object_name = _('DNS forward zone')
object_name_plural = _('DNS forward zones')
object_class = DNSZoneBase.object_class + ['idnsforwardzone']
label = _('DNS Forward Zones')
label_singular = _('DNS Forward Zone')
default_forward_policy = u'first'
# managed_permissions: permissions was apllied in dnszone class, do NOT
# add them here, they should not be applied twice.
def _warning_fw_zone_is_not_effective(self, result, *keys, **options):
fwzone = keys[-1]
_add_warning_fw_zone_is_not_effective(self.api, result, fwzone,
options['version'])
def _warning_if_forwarders_do_not_work(self, result, new_zone,
*keys, **options):
fwzone = keys[-1]
forwarders = options.get('idnsforwarders', [])
any_forwarder_work = False
for forwarder in forwarders:
try:
validate_dnssec_zone_forwarder_step1(forwarder, fwzone,
log=self.log)
except UnresolvableRecordError as e:
messages.add_message(
options['version'],
result, messages.DNSServerValidationWarning(
server=forwarder, error=e
)
)
except EDNS0UnsupportedError as e:
messages.add_message(
options['version'],
result, messages.DNSServerDoesNotSupportEDNS0Warning(
server=forwarder, error=e
)
)
else:
any_forwarder_work = True
if not any_forwarder_work:
# do not test DNSSEC validation if there is no valid forwarder
return
# resolve IP address of any DNS replica
# FIXME: https://fedorahosted.org/bind-dyndb-ldap/ticket/143
# we currenly should to test all IPA DNS replica, because DNSSEC
# validation is configured just in named.conf per replica
ipa_dns_masters = [normalize_zone(x) for x in
self.api.Object.dnsrecord.get_dns_masters()]
if not ipa_dns_masters:
# something very bad happened, DNS is installed, but no IPA DNS
# servers available
self.log.error("No IPA DNS server can be found, but integrated DNS "
"is installed")
return
ipa_dns_ip = None
for rdtype in (dns.rdatatype.A, dns.rdatatype.AAAA):
try:
ans = dns.resolver.query(ipa_dns_masters[0], rdtype)
except dns.exception.DNSException:
continue
else:
ipa_dns_ip = str(ans.rrset.items[0])
break
if not ipa_dns_ip:
self.log.error("Cannot resolve %s hostname", ipa_dns_masters[0])
return
# sleep a bit, adding new zone to BIND from LDAP may take a while
if new_zone:
time.sleep(5)
# Test if IPA is able to receive replies from forwarders
try:
validate_dnssec_zone_forwarder_step2(ipa_dns_ip, fwzone,
log=self.log)
except DNSSECValidationError as e:
messages.add_message(
options['version'],
result, messages.DNSSECValidationFailingWarning(error=e)
)
except UnresolvableRecordError as e:
messages.add_message(
options['version'],
result, messages.DNSServerValidationWarning(
server=ipa_dns_ip, error=e
)
)
@register()
class dnsforwardzone_add(DNSZoneBase_add):
__doc__ = _('Create new DNS forward zone.')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
dn = super(dnsforwardzone_add, self).pre_callback(ldap, dn,
entry_attrs, attrs_list, *keys, **options)
if 'idnsforwardpolicy' not in entry_attrs:
entry_attrs['idnsforwardpolicy'] = self.obj.default_forward_policy
if (not entry_attrs.get('idnsforwarders') and
entry_attrs['idnsforwardpolicy'] != u'none'):
raise errors.ValidationError(name=u'idnsforwarders',
error=_('Please specify forwarders.'))
return dn
def execute(self, *keys, **options):
fwzone = keys[-1]
result = super(dnsforwardzone_add, self).execute(*keys, **options)
self.obj._warning_fw_zone_is_not_effective(result, *keys, **options)
_add_warning_fw_policy_conflict_aez(result, fwzone, **options)
if options.get('idnsforwarders'):
self.obj._warning_if_forwarders_do_not_work(
result, True, *keys, **options)
return result
@register()
class dnsforwardzone_del(DNSZoneBase_del):
__doc__ = _('Delete DNS forward zone.')
msg_summary = _('Deleted DNS forward zone "%(value)s"')
@register()
class dnsforwardzone_mod(DNSZoneBase_mod):
__doc__ = _('Modify DNS forward zone.')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
try:
entry = ldap.get_entry(dn)
except errors.NotFound:
self.obj.handle_not_found(*keys)
if not _check_entry_objectclass(entry, self.obj.object_class):
self.obj.handle_not_found(*keys)
policy = self.obj.default_forward_policy
forwarders = []
if 'idnsforwarders' in entry_attrs:
forwarders = entry_attrs['idnsforwarders']
elif 'idnsforwarders' in entry:
forwarders = entry['idnsforwarders']
if 'idnsforwardpolicy' in entry_attrs:
policy = entry_attrs['idnsforwardpolicy']
elif 'idnsforwardpolicy' in entry:
policy = entry['idnsforwardpolicy']
if not forwarders and policy != u'none':
raise errors.ValidationError(name=u'idnsforwarders',
error=_('Please specify forwarders.'))
return dn
def execute(self, *keys, **options):
fwzone = keys[-1]
result = super(dnsforwardzone_mod, self).execute(*keys, **options)
_add_warning_fw_policy_conflict_aez(result, fwzone, **options)
if options.get('idnsforwarders'):
self.obj._warning_if_forwarders_do_not_work(result, False, *keys,
**options)
return result
@register()
class dnsforwardzone_find(DNSZoneBase_find):
__doc__ = _('Search for DNS forward zones.')
@register()
class dnsforwardzone_show(DNSZoneBase_show):
__doc__ = _('Display information about a DNS forward zone.')
@register()
class dnsforwardzone_disable(DNSZoneBase_disable):
__doc__ = _('Disable DNS Forward Zone.')
msg_summary = _('Disabled DNS forward zone "%(value)s"')
@register()
class dnsforwardzone_enable(DNSZoneBase_enable):
__doc__ = _('Enable DNS Forward Zone.')
msg_summary = _('Enabled DNS forward zone "%(value)s"')
def execute(self, *keys, **options):
result = super(dnsforwardzone_enable, self).execute(*keys, **options)
self.obj._warning_fw_zone_is_not_effective(result, *keys, **options)
return result
@register()
class dnsforwardzone_add_permission(DNSZoneBase_add_permission):
__doc__ = _('Add a permission for per-forward zone access delegation.')
@register()
class dnsforwardzone_remove_permission(DNSZoneBase_remove_permission):
__doc__ = _('Remove a permission for per-forward zone access delegation.')
@register()
class dns_system_records(Object):
takes_params = (
Str(
'ipa_records*',
label=_('IPA DNS records')
),
Str(
'location_records*',
label=_('IPA location records')
)
)
@register()
class dns_update_system_records(Method):
__doc__ = _('Update location and IPA server DNS records')
obj_name = 'dns_system_records'
attr_name = 'update'
has_output = (
output.Entry(
'result',
),
output.Output(
'value', bool,
_('Result of the command'), ['no_display']
)
)
takes_options = (
Flag(
'dry_run',
label=_('Dry run'),
doc=_('Do not update records only return expected records')
)
)
def execute(self, *args, **options):
def output_to_list(iterable):
rec_list = []
for name, node in iterable:
rec_list.extend(IPASystemRecords.records_list_from_node(
name, node))
return rec_list
def output_to_list_with_failed(iterable):
err_rec_list = []
for name, node, error in iterable:
err_rec_list.extend([
(v, unicode(error)) for v in
IPASystemRecords.records_list_from_node(name, node)
])
return err_rec_list
result = {
'result': {},
'value': True,
}
system_records = IPASystemRecords(self.api)
if options.get('dry_run'):
result['result']['ipa_records'] = output_to_list(
system_records.get_base_records().items())
result['result']['location_records'] = output_to_list(
system_records.get_locations_records().items())
else:
try:
(
(success_base, failed_base),
(success_loc, failed_loc),
) = system_records.update_dns_records()
except IPADomainIsNotManagedByIPAError:
result['value'] = False
self.add_message(
messages.DNSUpdateNotIPAManagedZone(
zone=self.api.env.domain)
)
result['result']['ipa_records'] = output_to_list(
system_records.get_base_records().items())
else:
if success_base:
result['result']['ipa_records'] = output_to_list(
success_base)
if success_loc:
result['result']['location_records'] = output_to_list(
success_loc)
for failed in (failed_base, failed_loc):
for record, error in output_to_list_with_failed(failed):
self.add_message(
messages.DNSUpdateOfSystemRecordFailed(
record=record,
error=error
)
)
if failed_base or failed_loc:
result['value'] = False
return result
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