mirror of
https://salsa.debian.org/freeipa-team/freeipa.git
synced 2024-12-28 18:01:23 -06:00
b29de6bf27
This disables all but the ldapi listener in DS so it will be quiet when we perform our upgrades. It is expected that any other clients that also use ldapi will be shut down by other already (krb5 and dns). Add ldapi as an option in ipaldap and add the beginning of pure offline support (e.g. direct editing of LDIF files).
660 lines
24 KiB
Python
660 lines
24 KiB
Python
# Authors: Rich Megginson <richm@redhat.com>
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# Rob Crittenden <rcritten@redhat.com
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#
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# Copyright (C) 2007 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; version 2 only
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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import sys
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import os
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import os.path
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import socket
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import ldif
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import re
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import string
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import ldap
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import cStringIO
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import time
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import struct
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import ldap.sasl
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from ldap.controls import LDAPControl,DecodeControlTuples,EncodeControlTuples
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from ldap.ldapobject import SimpleLDAPObject
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from ipaserver import ipautil
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from ipalib import errors
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# Global variable to define SASL auth
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sasl_auth = ldap.sasl.sasl({},'GSSAPI')
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class Entry:
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"""
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This class represents an LDAP Entry object. An LDAP entry consists of
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a DN and a list of attributes. Each attribute consists of a name and
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a list of values. In python-ldap, entries are returned as a list of
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2-tuples. Instance variables:
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* dn - string - the string DN of the entry
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* data - CIDict - case insensitive dict of the attributes and values
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"""
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def __init__(self,entrydata):
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"""data is the raw data returned from the python-ldap result method, which is
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a search result entry or a reference or None.
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If creating a new empty entry, data is the string DN."""
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if entrydata:
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if isinstance(entrydata,tuple):
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self.dn = entrydata[0]
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self.data = ipautil.CIDict(entrydata[1])
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elif isinstance(entrydata,str) or isinstance(entrydata,unicode):
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self.dn = entrydata
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self.data = ipautil.CIDict()
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else:
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self.dn = ''
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self.data = ipautil.CIDict()
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def __nonzero__(self):
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"""This allows us to do tests like if entry: returns false if there is no data,
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true otherwise"""
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return self.data != None and len(self.data) > 0
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def hasAttr(self,name):
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"""Return True if this entry has an attribute named name, False otherwise"""
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return self.data and self.data.has_key(name)
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def __getattr__(self,name):
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"""If name is the name of an LDAP attribute, return the first value for that
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attribute - equivalent to getValue - this allows the use of
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entry.cn
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instead of
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entry.getValue('cn')
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This also allows us to return None if an attribute is not found rather than
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throwing an exception"""
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return self.getValue(name)
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def getValues(self,name):
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"""Get the list (array) of values for the attribute named name"""
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return self.data.get(name)
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def getValue(self,name):
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"""Get the first value for the attribute named name"""
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return self.data.get(name,[None])[0]
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def setValue(self, name, *value):
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"""
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Set a value on this entry.
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The value passed in may be a single value, several values, or a
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single sequence. For example:
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* ent.setValue('name', 'value')
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* ent.setValue('name', 'value1', 'value2', ..., 'valueN')
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* ent.setValue('name', ['value1', 'value2', ..., 'valueN'])
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* ent.setValue('name', ('value1', 'value2', ..., 'valueN'))
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Since value is a tuple, we may have to extract a list or tuple from
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that tuple as in the last two examples above.
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"""
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if isinstance(value[0],list) or isinstance(value[0],tuple):
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self.data[name] = value[0]
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else:
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self.data[name] = value
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setValues = setValue
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def delAttr(self, name):
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"""
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Entirely remove an attribute of this entry.
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"""
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if self.hasAttr(name):
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del self.data[name]
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def toTupleList(self):
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"""Convert the attrs and values to a list of 2-tuples. The first element
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of the tuple is the attribute name. The second element is either a
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single value or a list of values."""
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r = []
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for i in self.data.iteritems():
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n = ipautil.utf8_encode_values(i[1])
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r.append((i[0], n))
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return r
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def toDict(self):
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"""Convert the attrs and values to a dict. The dict is keyed on the
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attribute name. The value is either single value or a list of values."""
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result = ipautil.CIDict(self.data)
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for i in result.keys():
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result[i] = ipautil.utf8_encode_values(result[i])
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result['dn'] = self.dn
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return result
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def __str__(self):
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"""Convert the Entry to its LDIF representation"""
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return self.__repr__()
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# the ldif class base64 encodes some attrs which I would rather see in
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# raw form - to encode specific attrs as base64, add them to the list below
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ldif.safe_string_re = re.compile('^$')
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base64_attrs = ['nsstate', 'krbprincipalkey', 'krbExtraData']
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def __repr__(self):
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"""Convert the Entry to its LDIF representation"""
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sio = cStringIO.StringIO()
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# what's all this then? the unparse method will currently only accept
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# a list or a dict, not a class derived from them. self.data is a
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# cidict, so unparse barfs on it. I've filed a bug against python-ldap,
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# but in the meantime, we have to convert to a plain old dict for
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# printing
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# I also don't want to see wrapping, so set the line width really high
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# (1000)
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newdata = {}
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newdata.update(self.data)
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ldif.LDIFWriter(sio,Entry.base64_attrs,1000).unparse(self.dn,newdata)
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return sio.getvalue()
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def wrapper(f,name):
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"""This is the method that wraps all of the methods of the superclass.
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This seems to need to be an unbound method, that's why it's outside
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of IPAdmin. Perhaps there is some way to do this with the new
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classmethod or staticmethod of 2.4. Basically, we replace every call
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to a method in SimpleLDAPObject (the superclass of IPAdmin) with a
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call to inner. The f argument to wrapper is the bound method of
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IPAdmin (which is inherited from the superclass). Bound means that it
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will implicitly be called with the self argument, it is not in the
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args list. name is the name of the method to call. If name is a
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method that returns entry objects (e.g. result), we wrap the data
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returned by an Entry class. If name is a method that takes an entry
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argument, we extract the raw data from the entry object to pass in.
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"""
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def inner(*args, **kargs):
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if name == 'result':
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objtype, data = f(*args, **kargs)
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# data is either a 2-tuple or a list of 2-tuples
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# print data
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if data:
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if isinstance(data,tuple):
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return objtype, Entry(data)
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elif isinstance(data,list):
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return objtype, [Entry(x) for x in data]
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else:
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raise TypeError, "unknown data type %s returned by result" % type(data)
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else:
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return objtype, data
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elif name.startswith('add'):
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# the first arg is self
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# the second and third arg are the dn and the data to send
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# We need to convert the Entry into the format used by
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# python-ldap
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ent = args[0]
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if isinstance(ent,Entry):
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return f(ent.dn, ent.toTupleList(), *args[2:])
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else:
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return f(*args, **kargs)
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else:
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return f(*args, **kargs)
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return inner
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class IPAdmin(SimpleLDAPObject):
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def __localinit(self):
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"""If a CA certificate is provided then it is assumed that we are
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doing SSL client authentication with proxy auth.
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If a CA certificate is not present then it is assumed that we are
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using a forwarded kerberos ticket for SASL auth. SASL provides
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its own encryption.
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"""
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if self.cacert is not None:
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SimpleLDAPObject.__init__(self,'ldaps://%s:%d' % (self.host,self.port))
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else:
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if self.ldapi:
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SimpleLDAPObject.__init__(self,'ldapi://%%2fvar%%2frun%%2fslapd-%s.socket' % "-".join(self.realm.split(".")))
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else:
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SimpleLDAPObject.__init__(self,'ldap://%s:%d' % (self.host,self.port))
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def __init__(self,host='',port=389,cacert=None,bindcert=None,bindkey=None,proxydn=None,debug=None,ldapi=False,realm=None):
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"""We just set our instance variables and wrap the methods - the real
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work is done in __localinit. This is separated out this way so
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that we can call it from places other than instance creation
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e.g. when we just need to reconnect
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"""
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if debug and debug.lower() == "on":
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ldap.set_option(ldap.OPT_DEBUG_LEVEL,255)
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if cacert is not None:
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ldap.set_option(ldap.OPT_X_TLS_CACERTFILE,cacert)
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if bindcert is not None:
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ldap.set_option(ldap.OPT_X_TLS_CERTFILE,bindcert)
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if bindkey is not None:
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ldap.set_option(ldap.OPT_X_TLS_KEYFILE,bindkey)
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self.__wrapmethods()
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self.port = port
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self.host = host
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self.cacert = cacert
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self.bindcert = bindcert
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self.bindkey = bindkey
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self.proxydn = proxydn
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self.ldapi = ldapi
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self.realm = realm
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self.suffixes = {}
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self.__localinit()
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def __lateinit(self):
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"""
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This is executed after the connection is bound to fill in some useful
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values.
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"""
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try:
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ent = self.getEntry('cn=config,cn=ldbm database,cn=plugins,cn=config',
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ldap.SCOPE_BASE, '(objectclass=*)',
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[ 'nsslapd-directory' ])
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self.dbdir = os.path.dirname(ent.getValue('nsslapd-directory'))
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except ldap.LDAPError, e:
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self.__handle_errors(e, **{})
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def __str__(self):
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return self.host + ":" + str(self.port)
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def __get_server_controls(self):
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"""Create the proxy user server control. The control has the form
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0x04 = Octet String
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4|0x80 sets the length of the string length field at 4 bytes
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the struct() gets us the length in bytes of string self.proxydn
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self.proxydn is the proxy dn to send"""
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if self.proxydn is not None:
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proxydn = chr(0x04) + chr(4|0x80) + struct.pack('l', socket.htonl(len(self.proxydn))) + self.proxydn;
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# Create the proxy control
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sctrl=[]
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sctrl.append(LDAPControl('2.16.840.1.113730.3.4.18',True,proxydn))
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else:
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sctrl=None
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return sctrl
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def __handle_errors(self, e, **kw):
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"""
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Centralize error handling in one place.
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e is the error to be raised
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**kw is an exception-specific list of options
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"""
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if not isinstance(e,ldap.TIMEOUT):
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desc = e.args[0]['desc'].strip()
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info = e.args[0].get('info','').strip()
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else:
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desc = ''
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info = ''
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try:
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# re-raise the error so we can handle it
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raise e
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except ldap.NO_SUCH_OBJECT, e:
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args = kw.get('args', ["entry not found"])
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raise errors.NotFound(reason=notfound(args))
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except ldap.ALREADY_EXISTS, e:
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raise errors.DuplicateEntry()
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except ldap.CONSTRAINT_VIOLATION, e:
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# This error gets thrown by the uniqueness plugin
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if info == 'Another entry with the same attribute value already exists':
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raise errors.DuplicateEntry()
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else:
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raise errors.DatabaseError(desc=desc,info=info)
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except ldap.INSUFFICIENT_ACCESS, e:
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raise errors.ACIError(info=info)
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except ldap.NO_SUCH_ATTRIBUTE:
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# this is raised when a 'delete' attribute isn't found.
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# it indicates the previous attribute was removed by another
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# update, making the oldentry stale.
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raise errors.MidairCollision()
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except ldap.ADMINLIMIT_EXCEEDED, e:
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raise errors.LimitsExceeded()
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except ldap.SIZELIMIT_EXCEEDED, e:
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raise errors.LimitsExceeded()
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except ldap.TIMELIMIT_EXCEEDED, e:
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raise errors.LimitsExceeded()
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except ldap.LDAPError, e:
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raise errors.DatabaseError(desc=desc,info=info)
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def toLDAPURL(self):
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return "ldap://%s:%d/" % (self.host,self.port)
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def set_proxydn(self, proxydn):
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self.proxydn = proxydn
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def set_krbccache(self, krbccache, principal):
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try:
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if krbccache is not None:
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os.environ["KRB5CCNAME"] = krbccache
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self.sasl_interactive_bind_s("", sasl_auth)
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self.principal = principal
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self.proxydn = None
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except ldap.LDAPError, e:
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self.__handle_errors(e, **{})
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def do_simple_bind(self, binddn="cn=directory manager", bindpw=""):
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self.binddn = binddn
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self.bindpwd = bindpw
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self.simple_bind_s(binddn, bindpw)
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self.__lateinit()
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def do_external_bind(self, user_name=None):
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auth_tokens = ldap.sasl.external(user_name)
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self.sasl_interactive_bind_s("", auth_tokens)
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self.__lateinit()
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def getEntry(self,*args):
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"""This wraps the search function. It is common to just get one entry"""
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sctrl = self.__get_server_controls()
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if sctrl is not None:
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self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
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try:
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res = self.search(*args)
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objtype, obj = self.result(res)
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except ldap.LDAPError, e:
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kw = {'args': args}
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self.__handle_errors(e, **kw)
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if not obj:
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raise errors.NotFound(reason=notfound(args))
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elif isinstance(obj,Entry):
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return obj
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else: # assume list/tuple
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return obj[0]
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def getList(self,*args):
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"""This wraps the search function to find multiple entries."""
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sctrl = self.__get_server_controls()
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if sctrl is not None:
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self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
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try:
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res = self.search(*args)
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objtype, obj = self.result(res)
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except ldap.LDAPError, e:
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kw = {'args': args}
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self.__handle_errors(e, **kw)
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if not obj:
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raise errors.NotFound(reason=notfound(args))
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entries = []
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for s in obj:
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entries.append(s)
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return entries
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def getListAsync(self,*args):
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"""This version performs an asynchronous search, to allow
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results even if we hit a limit.
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It returns a list: counter followed by the results.
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If the results are truncated, counter will be set to -1.
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"""
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sctrl = self.__get_server_controls()
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if sctrl is not None:
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self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
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entries = []
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partial = 0
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try:
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msgid = self.search_ext(*args)
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objtype, result_list = self.result(msgid, 0)
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while result_list:
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for result in result_list:
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entries.append(result)
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objtype, result_list = self.result(msgid, 0)
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except (ldap.ADMINLIMIT_EXCEEDED, ldap.SIZELIMIT_EXCEEDED,
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ldap.TIMELIMIT_EXCEEDED), e:
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partial = 1
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except ldap.LDAPError, e:
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kw = {'args': args}
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self.__handle_errors(e, **kw)
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if not entries:
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raise errors.NotFound(reason=notfound(args))
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if partial == 1:
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counter = -1
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else:
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counter = len(entries)
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return [counter] + entries
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def addEntry(self,*args):
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"""This wraps the add function. It assumes that the entry is already
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populated with all of the desired objectclasses and attributes"""
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sctrl = self.__get_server_controls()
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try:
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if sctrl is not None:
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self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
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self.add_s(*args)
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except ldap.LDAPError, e:
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kw = {'args': args}
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self.__handle_errors(e, **kw)
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return True
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def updateRDN(self, dn, newrdn):
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"""Wrap the modrdn function."""
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sctrl = self.__get_server_controls()
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if dn == newrdn:
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# no need to report an error
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return True
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try:
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if sctrl is not None:
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self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
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self.modrdn_s(dn, newrdn, delold=1)
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except ldap.LDAPError, e:
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self.__handle_errors(e, **{})
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return True
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def updateEntry(self,dn,oldentry,newentry):
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"""This wraps the mod function. It assumes that the entry is already
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populated with all of the desired objectclasses and attributes"""
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sctrl = self.__get_server_controls()
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modlist = self.generateModList(oldentry, newentry)
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if len(modlist) == 0:
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raise errors.EmptyModlist
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try:
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if sctrl is not None:
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self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
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self.modify_s(dn, modlist)
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except ldap.LDAPError, e:
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self.__handle_errors(e, **{})
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return True
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def generateModList(self, old_entry, new_entry):
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"""A mod list generator that computes more precise modification lists
|
|
than the python-ldap version. This version purposely generates no
|
|
REPLACE operations, to deal with multi-user updates more properly."""
|
|
modlist = []
|
|
|
|
old_entry = ipautil.CIDict(old_entry)
|
|
new_entry = ipautil.CIDict(new_entry)
|
|
|
|
keys = set(map(string.lower, old_entry.keys()))
|
|
keys.update(map(string.lower, new_entry.keys()))
|
|
|
|
for key in keys:
|
|
new_values = new_entry.get(key, [])
|
|
if not(isinstance(new_values,list) or isinstance(new_values,tuple)):
|
|
new_values = [new_values]
|
|
new_values = filter(lambda value:value!=None, new_values)
|
|
new_values = set(new_values)
|
|
|
|
old_values = old_entry.get(key, [])
|
|
if not(isinstance(old_values,list) or isinstance(old_values,tuple)):
|
|
old_values = [old_values]
|
|
old_values = filter(lambda value:value!=None, old_values)
|
|
old_values = set(old_values)
|
|
|
|
adds = list(new_values.difference(old_values))
|
|
removes = list(old_values.difference(new_values))
|
|
|
|
if len(removes) > 0:
|
|
modlist.append((ldap.MOD_DELETE, key, removes))
|
|
if len(adds) > 0:
|
|
modlist.append((ldap.MOD_ADD, key, adds))
|
|
|
|
return modlist
|
|
|
|
def inactivateEntry(self,dn,has_key):
|
|
"""Rather than deleting entries we mark them as inactive.
|
|
has_key defines whether the entry already has nsAccountlock
|
|
set so we can determine which type of mod operation to run."""
|
|
|
|
sctrl = self.__get_server_controls()
|
|
modlist=[]
|
|
|
|
if has_key:
|
|
operation = ldap.MOD_REPLACE
|
|
else:
|
|
operation = ldap.MOD_ADD
|
|
|
|
modlist.append((operation, "nsAccountlock", "true"))
|
|
|
|
try:
|
|
if sctrl is not None:
|
|
self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
|
|
self.modify_s(dn, modlist)
|
|
except ldap.LDAPError, e:
|
|
self.__handle_errors(e, **{})
|
|
return True
|
|
|
|
def deleteEntry(self,*args):
|
|
"""This wraps the delete function. Use with caution."""
|
|
|
|
sctrl = self.__get_server_controls()
|
|
|
|
try:
|
|
if sctrl is not None:
|
|
self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
|
|
self.delete_s(*args)
|
|
except ldap.LDAPError, e:
|
|
kw = {'args': args}
|
|
self.__handle_errors(e, **kw)
|
|
return True
|
|
|
|
def modifyPassword(self,dn,oldpass,newpass):
|
|
"""Set the user password using RFC 3062, LDAP Password Modify Extended
|
|
Operation. This ends up calling the IPA password slapi plugin
|
|
handler so the Kerberos password gets set properly.
|
|
|
|
oldpass is not mandatory
|
|
"""
|
|
|
|
sctrl = self.__get_server_controls()
|
|
|
|
try:
|
|
if sctrl is not None:
|
|
self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
|
|
self.passwd_s(dn, oldpass, newpass)
|
|
except ldap.LDAPError, e:
|
|
self.__handle_errors(e, **{})
|
|
return True
|
|
|
|
def __wrapmethods(self):
|
|
"""This wraps all methods of SimpleLDAPObject, so that we can intercept
|
|
the methods that deal with entries. Instead of using a raw list of tuples
|
|
of lists of hashes of arrays as the entry object, we want to wrap entries
|
|
in an Entry class that provides some useful methods"""
|
|
for name in dir(self.__class__.__bases__[0]):
|
|
attr = getattr(self, name)
|
|
if callable(attr):
|
|
setattr(self, name, wrapper(attr, name))
|
|
|
|
def waitForEntry(self, dn, timeout=7200, attr='', quiet=True):
|
|
scope = ldap.SCOPE_BASE
|
|
filter = "(objectclass=*)"
|
|
attrlist = []
|
|
if attr:
|
|
filter = "(%s=*)" % attr
|
|
attrlist.append(attr)
|
|
timeout += int(time.time())
|
|
|
|
if isinstance(dn,Entry):
|
|
dn = dn.dn
|
|
|
|
# wait for entry and/or attr to show up
|
|
if not quiet:
|
|
sys.stdout.write("Waiting for %s %s:%s " % (self,dn,attr))
|
|
sys.stdout.flush()
|
|
entry = None
|
|
while not entry and int(time.time()) < timeout:
|
|
try:
|
|
entry = self.getEntry(dn, scope, filter, attrlist)
|
|
except ipaerror.exception_for(ipaerror.LDAP_NOT_FOUND):
|
|
pass # found entry, but no attr
|
|
except ldap.NO_SUCH_OBJECT:
|
|
pass # no entry yet
|
|
except ldap.LDAPError, e: # badness
|
|
print "\nError reading entry", dn, e
|
|
break
|
|
if not entry:
|
|
if not quiet:
|
|
sys.stdout.write(".")
|
|
sys.stdout.flush()
|
|
time.sleep(1)
|
|
|
|
if not entry and int(time.time()) > timeout:
|
|
print "\nwaitForEntry timeout for %s for %s" % (self,dn)
|
|
elif entry and not quiet:
|
|
print "\nThe waited for entry is:", entry
|
|
elif not entry:
|
|
print "\nError: could not read entry %s from %s" % (dn,self)
|
|
|
|
return entry
|
|
|
|
def normalizeDN(dn):
|
|
# not great, but will do until we use a newer version of python-ldap
|
|
# that has DN utilities
|
|
ary = ldap.explode_dn(dn.lower())
|
|
return ",".join(ary)
|
|
normalizeDN = staticmethod(normalizeDN)
|
|
|
|
def notfound(args):
|
|
"""Return a string suitable for displaying as an error when a
|
|
search returns no results.
|
|
|
|
This just returns whatever is after the equals sign"""
|
|
if len(args) > 2:
|
|
searchfilter = args[2]
|
|
try:
|
|
# Python re doesn't do paren counting so the string could
|
|
# have a trailing paren "foo)"
|
|
target = re.match(r'\(.*=(.*)\)', searchfilter).group(1)
|
|
target = target.replace(")","")
|
|
except:
|
|
target = searchfilter
|
|
return "%s not found" % str(target)
|
|
else:
|
|
return args[0]
|