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# Authors:
# Jason Gerard DeRose <jderose@redhat.com>
#
# Copyright (C) 2008 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/>.
"""
Various utility functions.
"""
import os
import imp
import logging
import time
import socket
import re
from types import NoneType
from ipalib import errors
from ipapython import dnsclient
def json_serialize(obj):
if isinstance(obj, (list, tuple)):
return [json_serialize(o) for o in obj]
if isinstance(obj, dict):
return dict((k, json_serialize(v)) for (k, v) in obj.iteritems())
if isinstance(obj, (bool, float, int, unicode, NoneType)):
return obj
if isinstance(obj, str):
return obj.decode('utf-8')
if not callable(getattr(obj, '__json__', None)):
# raise TypeError('%r is not JSON serializable')
return ''
return json_serialize(obj.__json__())
def get_current_principal():
try:
# krbV isn't necessarily available on client machines, fail gracefully
import krbV
return unicode(krbV.default_context().default_ccache().principal().name)
except ImportError:
raise RuntimeError('python-krbV is not available.')
except krbV.Krb5Error:
#TODO: do a kinit?
raise errors.CCacheError()
def get_fqdn():
fqdn = ""
try:
fqdn = socket.getfqdn()
except:
try:
fqdn = socket.gethostname()
except:
fqdn = ""
return fqdn
# FIXME: This function has no unit test
def find_modules_in_dir(src_dir):
"""
Iterate through module names found in ``src_dir``.
"""
if not (os.path.abspath(src_dir) == src_dir and os.path.isdir(src_dir)):
return
if os.path.islink(src_dir):
return
suffix = '.py'
for name in sorted(os.listdir(src_dir)):
if not name.endswith(suffix):
continue
pyfile = os.path.join(src_dir, name)
if os.path.islink(pyfile) or not os.path.isfile(pyfile):
continue
module = name[:-len(suffix)]
if module == '__init__':
continue
yield (module, pyfile)
# FIXME: This function has no unit test
def load_plugins_in_dir(src_dir):
"""
Import each Python module found in ``src_dir``.
"""
for module in find_modules_in_dir(src_dir):
imp.load_module(module, *imp.find_module(module, [src_dir]))
# FIXME: This function has no unit test
def import_plugins_subpackage(name):
"""
Import everythig in ``plugins`` sub-package of package named ``name``.
"""
try:
plugins = __import__(name + '.plugins').plugins
except ImportError:
return
src_dir = os.path.dirname(os.path.abspath(plugins.__file__))
for name in find_modules_in_dir(src_dir):
full_name = '%s.%s' % (plugins.__name__, name)
__import__(full_name)
class LogFormatter(logging.Formatter):
"""
Log formatter that uses UTC for all timestamps.
"""
converter = time.gmtime
def make_repr(name, *args, **kw):
"""
Construct a standard representation of a class instance.
"""
args = [repr(a) for a in args]
kw = ['%s=%r' % (k, kw[k]) for k in sorted(kw)]
return '%s(%s)' % (name, ', '.join(args + kw))
def realm_to_suffix(realm_name):
s = realm_name.split(".")
terms = ["dc=" + x.lower() for x in s]
return ",".join(terms)
def validate_host_dns(log, fqdn):
"""
See if the hostname has a DNS A record.
"""
rs = dnsclient.query(fqdn + '.', dnsclient.DNS_C_IN, dnsclient.DNS_T_A)
if len(rs) == 0:
log.debug(
'IPA: DNS A record lookup failed for %s' % fqdn
)
raise errors.DNSNotARecordError()
else:
log.debug(
'IPA: found %d records for %s' % (len(rs), fqdn)
)
def isvalid_base64(data):
"""
Validate the incoming data as valid base64 data or not.
The character set must only include of a-z, A-Z, 0-9, + or / and
be padded with = to be a length divisible by 4 (so only 0-2 =s are
allowed). Its length must be divisible by 4. White space is
not significant so it is removed.
This doesn't guarantee we have a base64-encoded value, just that it
fits the base64 requirements.
"""
data = ''.join(data.split())
if len(data) % 4 > 0 or \
re.match('^[a-zA-Z0-9\+\/]+\={0,2}$', data) is None:
return False
else:
return True
def validate_ipaddr(ipaddr):
"""
Check to see if the given IP address is a valid IPv4 or IPv6 address.
Returns True or False
"""
try:
socket.inet_pton(socket.AF_INET, ipaddr)
except socket.error:
try:
socket.inet_pton(socket.AF_INET6, ipaddr)
except socket.error:
return False
return True
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