def _hostname_validator(ugettext, value):
try:
validate_hostname(value)
except ValueError as e:
return _('invalid domain-name: %s') % unicode(e)
return None
def verify_fqdn(host_name, no_host_dns=False, local_hostname=True):
"""
Run fqdn checks for given host:
- test hostname format
- test that hostname is fully qualified
- test forward and reverse hostname DNS lookup
Raises `BadHostError` or derived Exceptions if there is an error
:param host_name: The host name to verify.
:param no_host_dns: If true, skip DNS resolution tests of the host name.
:param local_hostname: If true, run additional checks for local hostnames
"""
if len(host_name.split(".")) < 2 or host_name == "localhost.localdomain":
raise BadHostError("Invalid hostname '%s', must be fully-qualified." % host_name)
if host_name != host_name.lower():
raise BadHostError("Invalid hostname '%s', must be lower-case." % host_name)
if ipautil.valid_ip(host_name):
raise BadHostError("IP address not allowed as a hostname")
try:
# make sure that the host name meets the requirements in ipalib
validate_hostname(host_name)
except ValueError, e:
raise BadHostError("Invalid hostname '%s', %s" % (host_name, unicode(e)))
def verify_fqdn(host_name, no_host_dns=False, local_hostname=True):
"""
Run fqdn checks for given host:
- test hostname format
- test that hostname is fully qualified
- test forward and reverse hostname DNS lookup
Raises `BadHostError` or derived Exceptions if there is an error
:param host_name: The host name to verify.
:param no_host_dns: If true, skip DNS resolution tests of the host name.
:param local_hostname: If true, run additional checks for local hostnames
"""
if len(host_name.split(".")) < 2 or host_name == "localhost.localdomain":
raise BadHostError("Invalid hostname '%s', must be fully-qualified." %
host_name)
if host_name != host_name.lower():
raise BadHostError("Invalid hostname '%s', must be lower-case." %
host_name)
if ipautil.valid_ip(host_name):
raise BadHostError("IP address not allowed as a hostname")
try:
# make sure that the host name meets the requirements in ipalib
validate_hostname(host_name)
except ValueError, e:
raise BadHostError("Invalid hostname '%s', %s" %
(host_name, unicode(e)))
def _hostname_validator(ugettext, value):
try:
validate_hostname(value)
except ValueError as e:
return _('invalid domain-name: %s') % unicode(e)
return None
def validate_radiusserver(ugettext, server):
split = server.rsplit(':', 1)
server = split[0]
if len(split) == 2:
try:
port = int(split[1])
if (port < 0 or port > 65535):
raise ValueError()
except ValueError:
raise ValidationError(name="ipatokenradiusserver",
error=_('invalid port number'))
if validate_ipaddr(server):
return
try:
validate_hostname(server, check_fqdn=True, allow_underscore=True)
except ValueError as e:
raise errors.ValidationError(name="ipatokenradiusserver", error=str(e))
def validate_radiusserver(ugettext, server):
split = server.rsplit(':', 1)
server = split[0]
if len(split) == 2:
try:
port = int(split[1])
if (port < 0 or port > 65535):
raise ValueError()
except ValueError:
raise ValidationError(name="ipatokenradiusserver",
error=_('invalid port number'))
if validate_ipaddr(server):
return
try:
validate_hostname(server, check_fqdn=True, allow_underscore=True)
except ValueError, e:
raise errors.ValidationError(name="ipatokenradiusserver",
error=e.message)
def verify_fqdn(host_name, no_host_dns=False, local_hostname=True):
"""
Run fqdn checks for given host:
- test hostname format
- test that hostname is fully qualified
- test forward and reverse hostname DNS lookup
Raises `BadHostError` or derived Exceptions if there is an error
:param host_name: The host name to verify.
:param no_host_dns: If true, skip DNS resolution tests of the host name.
:param local_hostname: If true, run additional checks for local hostnames
"""
if len(host_name.split(".")) < 2 or host_name == "localhost.localdomain":
raise BadHostError("Invalid hostname '%s', must be fully-qualified." % host_name)
if host_name != host_name.lower():
raise BadHostError("Invalid hostname '%s', must be lower-case." % host_name)
if ipautil.valid_ip(host_name):
raise BadHostError("IP address not allowed as a hostname")
try:
# make sure that the host name meets the requirements in ipalib
validate_hostname(host_name)
except ValueError as e:
raise BadHostError("Invalid hostname '%s', %s" % (host_name, unicode(e)))
if local_hostname:
try:
logger.debug('Check if %s is a primary hostname for localhost',
host_name)
ex_name = socket.gethostbyaddr(host_name)
logger.debug('Primary hostname for localhost: %s', ex_name[0])
if host_name != ex_name[0]:
raise HostLookupError("The host name %s does not match the primary host name %s. "\
"Please check /etc/hosts or DNS name resolution" % (host_name, ex_name[0]))
except socket.gaierror:
pass
except socket.error as e:
logger.debug(
'socket.gethostbyaddr() error: %d: %s',
e.errno, e.strerror) # pylint: disable=no-member
if no_host_dns:
print("Warning: skipping DNS resolution of host", host_name)
return
try:
logger.debug('Search DNS for %s', host_name)
hostaddr = socket.getaddrinfo(host_name, None)
except Exception as e:
logger.debug('Search failed: %s', e)
raise HostForwardLookupError("Unable to resolve host name, check /etc/hosts or DNS name resolution")
if len(hostaddr) == 0:
raise HostForwardLookupError("Unable to resolve host name, check /etc/hosts or DNS name resolution")
# Verify this is NOT a CNAME
try:
logger.debug('Check if %s is not a CNAME', host_name)
resolver.query(host_name, rdatatype.CNAME)
raise HostReverseLookupError("The IPA Server Hostname cannot be a CNAME, only A and AAAA names are allowed.")
except DNSException:
pass
# list of verified addresses to prevent multiple searches for the same address
verified = set()
for a in hostaddr:
address = a[4][0]
if address in verified:
continue
if address in ('127.0.0.1', '::1'):
raise HostForwardLookupError("The IPA Server hostname must not resolve to localhost (%s). A routable IP address must be used. Check /etc/hosts to see if %s is an alias for %s" % (address, host_name, address))
try:
logger.debug('Check reverse address of %s', address)
revname = socket.gethostbyaddr(address)[0]
except Exception as e:
logger.debug('Check failed: %s', e)
logger.error(
"Unable to resolve the IP address %s to a host name, "
"check /etc/hosts and DNS name resolution", address)
else:
logger.debug('Found reverse name: %s', revname)
if revname != host_name:
logger.error(
"The host name %s does not match the value %s obtained "
"by reverse lookup on IP address %s", host_name, revname,
address)
verified.add(address)
def verify_fqdn(host_name, no_host_dns=False, local_hostname=True):
"""
Run fqdn checks for given host:
- test hostname format
- test that hostname is fully qualified
- test forward and reverse hostname DNS lookup
Raises `BadHostError` or derived Exceptions if there is an error
:param host_name: The host name to verify.
:param no_host_dns: If true, skip DNS resolution tests of the host name.
:param local_hostname: If true, run additional checks for local hostnames
"""
if len(host_name.split(".")) < 2 or host_name == "localhost.localdomain":
raise BadHostError("Invalid hostname '%s', must be fully-qualified." % host_name)
if host_name != host_name.lower():
raise BadHostError("Invalid hostname '%s', must be lower-case." % host_name)
if ipautil.valid_ip(host_name):
raise BadHostError("IP address not allowed as a hostname")
try:
# make sure that the host name meets the requirements in ipalib
validate_hostname(host_name)
except ValueError as e:
raise BadHostError("Invalid hostname '%s', %s" % (host_name, unicode(e)))
if local_hostname:
try:
root_logger.debug('Check if %s is a primary hostname for localhost', host_name)
ex_name = socket.gethostbyaddr(host_name)
root_logger.debug('Primary hostname for localhost: %s', ex_name[0])
if host_name != ex_name[0]:
raise HostLookupError("The host name %s does not match the primary host name %s. "\
"Please check /etc/hosts or DNS name resolution" % (host_name, ex_name[0]))
except socket.gaierror:
pass
except socket.error as e:
root_logger.debug(
'socket.gethostbyaddr() error: %d: %s',
e.errno, e.strerror) # pylint: disable=no-member
if no_host_dns:
print("Warning: skipping DNS resolution of host", host_name)
return
try:
root_logger.debug('Search DNS for %s', host_name)
hostaddr = socket.getaddrinfo(host_name, None)
except Exception as e:
root_logger.debug('Search failed: %s', e)
raise HostForwardLookupError("Unable to resolve host name, check /etc/hosts or DNS name resolution")
if len(hostaddr) == 0:
raise HostForwardLookupError("Unable to resolve host name, check /etc/hosts or DNS name resolution")
# Verify this is NOT a CNAME
try:
root_logger.debug('Check if %s is not a CNAME', host_name)
resolver.query(host_name, rdatatype.CNAME)
raise HostReverseLookupError("The IPA Server Hostname cannot be a CNAME, only A and AAAA names are allowed.")
except DNSException:
pass
# list of verified addresses to prevent multiple searches for the same address
verified = set()
for a in hostaddr:
address = a[4][0]
if address in verified:
continue
if address == '127.0.0.1' or address == '::1':
raise HostForwardLookupError("The IPA Server hostname must not resolve to localhost (%s). A routable IP address must be used. Check /etc/hosts to see if %s is an alias for %s" % (address, host_name, address))
try:
root_logger.debug('Check reverse address of %s', address)
revname = socket.gethostbyaddr(address)[0]
except Exception as e:
root_logger.debug('Check failed: %s', e)
root_logger.error(
"Unable to resolve the IP address %s to a host name, "
"check /etc/hosts and DNS name resolution", address)
else:
root_logger.debug('Found reverse name: %s', revname)
if revname != host_name:
root_logger.error(
"The host name %s does not match the value %s obtained "
"by reverse lookup on IP address %s", host_name, revname,
address)
verified.add(address)
