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5d1d513849
freeipa/ipapython/ipaldap.py
Jan Cholasta 5d1d513849 Always use lists for values in LDAPEntry internally. 
Outside of LDAPEntry, it is still possible to use non-lists. Once we enforce
lists for attribute values, this will be removed.

https://fedorahosted.org/freeipa/ticket/3521
2013-10-31 18:09:51 +01:00

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# Authors: Rich Megginson <richm@redhat.com>
# Rob Crittenden <rcritten@redhat.com>
# John Dennis <jdennis@redhat.com>
#
# Copyright (C) 2007 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/>.
#
import string
import time
import shutil
from decimal import Decimal
from copy import deepcopy
import contextlib
import collections
import ldap
import ldap.sasl
import ldap.filter
from ldap.ldapobject import SimpleLDAPObject
import ldapurl
from ipalib import errors, _
from ipapython import ipautil
from ipapython.ipautil import (
format_netloc, wait_for_open_socket, wait_for_open_ports, CIDict)
from ipapython.ipa_log_manager import log_mgr
from ipapython.dn import DN, RDN
# Global variable to define SASL auth
SASL_GSSAPI = ldap.sasl.sasl({}, 'GSSAPI')
DEFAULT_TIMEOUT = 10
DN_SYNTAX_OID = '1.3.6.1.4.1.1466.115.121.1.12'
_debug_log_ldap = False
# Group Member types
MEMBERS_ALL = 0
MEMBERS_DIRECT = 1
MEMBERS_INDIRECT = 2
_missing = object()
def unicode_from_utf8(val):
'''
val is a UTF-8 encoded string, return a unicode object.
'''
return val.decode('utf-8')
def value_to_utf8(val):
'''
Coerce the val parameter to a UTF-8 encoded string representation
of the val.
'''
# If val is not a string we need to convert it to a string
# (specifically a unicode string). Naively we might think we need to
# call str(val) to convert to a string. This is incorrect because if
# val is already a unicode object then str() will call
# encode(default_encoding) returning a str object encoded with
# default_encoding. But we don't want to apply the default_encoding!
# Rather we want to guarantee the val object has been converted to a
# unicode string because from a unicode string we want to explicitly
# encode to a str using our desired encoding (utf-8 in this case).
#
# Note: calling unicode on a unicode object simply returns the exact
# same object (with it's ref count incremented). This means calling
# unicode on a unicode object is effectively a no-op, thus it's not
# inefficient.
return unicode(val).encode('utf-8')
class _ServerSchema(object):
'''
Properties of a schema retrieved from an LDAP server.
'''
def __init__(self, server, schema):
self.server = server
self.schema = schema
self.retrieve_timestamp = time.time()
class SchemaCache(object):
'''
Cache the schema's from individual LDAP servers.
'''
def __init__(self):
self.log = log_mgr.get_logger(self)
self.servers = {}
def get_schema(self, url, conn, force_update=False):
'''
Return schema belonging to a specific LDAP server.
For performance reasons the schema is retrieved once and
cached unless force_update is True. force_update flushes the
existing schema for the server from the cache and reacquires
it.
'''
if force_update:
self.flush(url)
server_schema = self.servers.get(url)
if server_schema is None:
schema = self._retrieve_schema_from_server(url, conn)
server_schema = _ServerSchema(url, schema)
self.servers[url] = server_schema
return server_schema.schema
def flush(self, url):
self.log.debug('flushing %s from SchemaCache', url)
try:
del self.servers[url]
except KeyError:
pass
def _retrieve_schema_from_server(self, url, conn):
"""
Retrieve the LDAP schema from the provided url and determine if
User-Private Groups (upg) are configured.
Bind using kerberos credentials. If in the context of the
in-tree "lite" server then use the current ccache. If in the context of
Apache then create a new ccache and bind using the Apache HTTP service
principal.
If a connection is provided then it the credentials bound to it are
used. The connection is not closed when the request is done.
"""
tmpdir = None
assert conn is not None
self.log.debug(
'retrieving schema for SchemaCache url=%s conn=%s', url, conn)
try:
try:
schema_entry = conn.search_s('cn=schema', ldap.SCOPE_BASE,
attrlist=['attributetypes', 'objectclasses'])[0]
except ldap.NO_SUCH_OBJECT:
# try different location for schema
# openldap has schema located in cn=subschema
self.log.debug('cn=schema not found, fallback to cn=subschema')
schema_entry = conn.search_s('cn=subschema', ldap.SCOPE_BASE,
attrlist=['attributetypes', 'objectclasses'])[0]
except ldap.SERVER_DOWN:
raise errors.NetworkError(uri=url,
error=u'LDAP Server Down, unable to retrieve LDAP schema')
except ldap.LDAPError, e:
desc = e.args[0]['desc'].strip()
info = e.args[0].get('info', '').strip()
raise errors.DatabaseError(desc = u'uri=%s' % url,
info = u'Unable to retrieve LDAP schema: %s: %s' % (desc, info))
except IndexError:
# no 'cn=schema' entry in LDAP? some servers use 'cn=subschema'
# TODO: DS uses 'cn=schema', support for other server?
# raise a more appropriate exception
raise
finally:
if tmpdir:
shutil.rmtree(tmpdir)
return ldap.schema.SubSchema(schema_entry[1])
schema_cache = SchemaCache()
class IPASimpleLDAPObject(object):
'''
The purpose of this class is to provide a boundary between IPA and
python-ldap. In IPA we use IPA defined types because they are
richer and are designed to meet our needs. We also require that we
consistently use those types without exception. On the other hand
python-ldap uses different types. The goal is to be able to have
IPA code call python-ldap methods using the types native to
IPA. This class accomplishes that goal by exposing python-ldap
methods which take IPA types, convert them to python-ldap types,
call python-ldap, and then convert the results returned by
python-ldap into IPA types.
IPA code should never call python-ldap directly, it should only
call python-ldap methods in this class.
'''
# Note: the oid for dn syntax is: 1.3.6.1.4.1.1466.115.121.1.12
_SYNTAX_MAPPING = {
'1.3.6.1.4.1.1466.115.121.1.1' : str, # ACI item
'1.3.6.1.4.1.1466.115.121.1.4' : str, # Audio
'1.3.6.1.4.1.1466.115.121.1.5' : str, # Binary
'1.3.6.1.4.1.1466.115.121.1.8' : str, # Certificate
'1.3.6.1.4.1.1466.115.121.1.9' : str, # Certificate List
'1.3.6.1.4.1.1466.115.121.1.10' : str, # Certificate Pair
'1.3.6.1.4.1.1466.115.121.1.23' : str, # Fax
'1.3.6.1.4.1.1466.115.121.1.28' : str, # JPEG
'1.3.6.1.4.1.1466.115.121.1.40' : str, # OctetString (same as Binary)
'1.3.6.1.4.1.1466.115.121.1.49' : str, # Supported Algorithm
'1.3.6.1.4.1.1466.115.121.1.51' : str, # Teletext Terminal Identifier
DN_SYNTAX_OID : DN, # DN, member, memberof
'2.16.840.1.113730.3.8.3.3' : DN, # enrolledBy
'2.16.840.1.113730.3.8.3.18' : DN, # managedBy
'2.16.840.1.113730.3.8.3.5' : DN, # memberUser
'2.16.840.1.113730.3.8.3.7' : DN, # memberHost
'2.16.840.1.113730.3.8.3.20' : DN, # memberService
'2.16.840.1.113730.3.8.11.4' : DN, # ipaNTFallbackPrimaryGroup
'2.16.840.1.113730.3.8.11.21' : DN, # ipaAllowToImpersonate
'2.16.840.1.113730.3.8.11.22' : DN, # ipaAllowedTarget
'2.16.840.1.113730.3.8.7.1' : DN, # memberAllowCmd
'2.16.840.1.113730.3.8.7.2' : DN, # memberDenyCmd
'2.16.840.1.113719.1.301.4.14.1' : DN, # krbRealmReferences
'2.16.840.1.113719.1.301.4.17.1' : DN, # krbKdcServers
'2.16.840.1.113719.1.301.4.18.1' : DN, # krbPwdServers
'2.16.840.1.113719.1.301.4.26.1' : DN, # krbPrincipalReferences
'2.16.840.1.113719.1.301.4.29.1' : DN, # krbAdmServers
'2.16.840.1.113719.1.301.4.36.1' : DN, # krbPwdPolicyReference
'2.16.840.1.113719.1.301.4.40.1' : DN, # krbTicketPolicyReference
'2.16.840.1.113719.1.301.4.41.1' : DN, # krbSubTrees
'2.16.840.1.113719.1.301.4.52.1' : DN, # krbObjectReferences
'2.16.840.1.113719.1.301.4.53.1' : DN, # krbPrincContainerRef
}
# In most cases we lookup the syntax from the schema returned by
# the server. However, sometimes attributes may not be defined in
# the schema (e.g. extensibleObject which permits undefined
# attributes), or the schema was incorrectly defined (i.e. giving
# an attribute the syntax DirectoryString when in fact it's really
# a DN). This (hopefully sparse) table allows us to trap these
# anomalies and force them to be the syntax we know to be in use.
#
# FWIW, many entries under cn=config are undefined :-(
_SCHEMA_OVERRIDE = CIDict({
'managedtemplate': DN_SYNTAX_OID, # DN
'managedbase': DN_SYNTAX_OID, # DN
'originscope': DN_SYNTAX_OID, # DN
})
def __init__(self, uri, force_schema_updates, no_schema=False,
decode_attrs=True):
"""An internal LDAP connection object
:param uri: The LDAP URI to connect to
:param force_schema_updates:
If true, this object will always request a new schema from the
server. If false, a cached schema will be reused if it exists.
Generally, it should be true if the API context is 'installer' or
'updates', but it must be given explicitly since the API object
is not always available
:param no_schema: If true, schema is never requested from the server.
:param decode_attrs:
If true, attributes are decoded to Python types according to their
syntax.
"""
self.log = log_mgr.get_logger(self)
self.uri = uri
self.conn = SimpleLDAPObject(uri)
self._no_schema = no_schema
self._has_schema = False
self._schema = None
self._force_schema_updates = force_schema_updates
self._decode_attrs = decode_attrs
def _get_schema(self):
if self._no_schema:
return None
if not self._has_schema:
try:
self._schema = schema_cache.get_schema(
self.uri, self.conn,
force_update=self._force_schema_updates)
except (errors.ExecutionError, IndexError):
pass
self._has_schema = True
return self._schema
schema = property(_get_schema, None, None, 'schema associated with this LDAP server')
def flush_cached_schema(self):
'''
Force this instance to forget it's cached schema and reacquire
it from the schema cache.
'''
# Currently this is called during bind operations to assure
# we're working with valid schema for a specific
# connection. This causes self._get_schema() to query the
# schema cache for the server's schema passing along a flag
# indicating if we're in a context that requires freshly
# loading the schema vs. returning the last cached version of
# the schema. If we're in a mode that permits use of
# previously cached schema the flush and reacquire is a very
# low cost operation.
#
# The schema is reacquired whenever this object is
# instantiated or when binding occurs. The schema is not
# reacquired for operations during a bound connection, it is
# presumed schema cannot change during this interval. This
# provides for maximum efficiency in contexts which do need
# schema refreshing by only peforming the refresh inbetween
# logical operations that have the potential to cause a schema
# change.
self._has_schema = False
self._schema = None
def get_syntax(self, attr):
# Is this a special case attribute?
syntax = self._SCHEMA_OVERRIDE.get(attr)
if syntax is not None:
return syntax
if self.schema is None:
return None
# Try to lookup the syntax in the schema returned by the server
obj = self.schema.get_obj(ldap.schema.AttributeType, attr)
if obj is not None:
return obj.syntax
else:
return None
def has_dn_syntax(self, attr):
"""
Check the schema to see if the attribute uses DN syntax.
Returns True/False
"""
syntax = self.get_syntax(attr)
return syntax == DN_SYNTAX_OID
def encode(self, val):
"""
Encode attribute value to LDAP representation (str).
"""
# Booleans are both an instance of bool and int, therefore
# test for bool before int otherwise the int clause will be
# entered for a boolean value instead of the boolean clause.
if isinstance(val, bool):
if val:
return 'TRUE'
else:
return 'FALSE'
elif isinstance(val, (unicode, float, int, long, Decimal, DN)):
return value_to_utf8(val)
elif isinstance(val, str):
return val
elif isinstance(val, list):
return [self.encode(m) for m in val]
elif isinstance(val, tuple):
return tuple(self.encode(m) for m in val)
elif isinstance(val, dict):
dct = dict((self.encode(k), self.encode(v)) for k, v in val.iteritems())
return dct
elif val is None:
return None
else:
raise TypeError("attempt to pass unsupported type to ldap, value=%s type=%s" %(val, type(val)))
def decode(self, val, attr):
"""
Decode attribute value from LDAP representation (str).
"""
if isinstance(val, str):
if not self._decode_attrs:
return val
target_type = self._SYNTAX_MAPPING.get(self.get_syntax(attr), unicode_from_utf8)
if target_type is str:
return val
try:
return target_type(val)
except Exception, e:
msg = 'unable to convert the attribute "%s" value "%s" to type %s' % (attr, val, target_type)
self.log.error(msg)
raise ValueError(msg)
elif isinstance(val, list):
return [self.decode(m, attr) for m in val]
elif isinstance(val, tuple):
return tuple(self.decode(m, attr) for m in val)
elif isinstance(val, dict):
dct = dict((unicode_from_utf8(k), self.decode(v, k)) for k, v in val.iteritems())
return dct
elif val is None:
return None
else:
raise TypeError("attempt to pass unsupported type from ldap, value=%s type=%s" %(val, type(val)))
def convert_result(self, result):
'''
result is a python-ldap result tuple of the form (dn, attrs),
where dn is a string containing the dn (distinguished name) of
the entry, and attrs is a dictionary containing the attributes
associated with the entry. The keys of attrs are strings, and
the associated values are lists of strings.
We convert the dn to a DN object.
We convert every value associated with an attribute according
to it's syntax into the desired Python type.
returns a IPA result tuple of the same form as a python-ldap
result tuple except everything inside of the result tuple has
been converted to it's preferred IPA python type.
'''
ipa_result = []
for dn_tuple in result:
original_dn = dn_tuple[0]
original_attrs = dn_tuple[1]
# original_dn is None if referral instead of an entry was
# returned from the LDAP server, we need to skip this item
if original_dn is None:
log_msg = 'Referral entry ignored: {ref}'\
.format(ref=str(original_attrs))
self.log.debug(log_msg)
continue
ipa_entry = LDAPEntry(self, DN(original_dn))
for attr, original_values in original_attrs.items():
ipa_entry[attr] = self.decode(original_values, attr)
ipa_result.append(ipa_entry)
if _debug_log_ldap:
self.log.debug('ldap.result: %s', ipa_result)
return ipa_result
#---------- python-ldap emulations ----------
def add(self, dn, modlist):
assert isinstance(dn, DN)
dn = str(dn)
modlist = self.encode(modlist)
return self.conn.add(dn, modlist)
def add_ext(self, dn, modlist, serverctrls=None, clientctrls=None):
assert isinstance(dn, DN)
dn = str(dn)
modlist = self.encode(modlist)
return self.conn.add_ext(dn, modlist, serverctrls, clientctrls)
def add_ext_s(self, dn, modlist, serverctrls=None, clientctrls=None):
assert isinstance(dn, DN)
dn = str(dn)
modlist = self.encode(modlist)
return self.conn.add_ext_s(dn, modlist, serverctrls, clientctrls)
def add_s(self, dn, modlist):
assert isinstance(dn, DN)
dn = str(dn)
modlist = self.encode(modlist)
return self.conn.add_s(dn, modlist)
def bind(self, who, cred, method=ldap.AUTH_SIMPLE):
self.flush_cached_schema()
if who is None:
who = DN()
assert isinstance(who, DN)
who = str(who)
cred = self.encode(cred)
return self.conn.bind(who, cred, method)
def delete(self, dn):
assert isinstance(dn, DN)
dn = str(dn)
return self.conn.delete(dn)
def delete_s(self, dn):
assert isinstance(dn, DN)
dn = str(dn)
return self.conn.delete_s(dn)
def get_option(self, option):
return self.conn.get_option(option)
def modify_s(self, dn, modlist):
assert isinstance(dn, DN)
dn = str(dn)
modlist = [(x[0], self.encode(x[1]), self.encode(x[2])) for x in modlist]
return self.conn.modify_s(dn, modlist)
def modrdn_s(self, dn, newrdn, delold=1):
assert isinstance(dn, DN)
dn = str(dn)
assert isinstance(newrdn, (DN, RDN))
newrdn = str(newrdn)
return self.conn.modrdn_s(dn, newrdn, delold)
def passwd_s(self, dn, oldpw, newpw, serverctrls=None, clientctrls=None):
assert isinstance(dn, DN)
dn = str(dn)
oldpw = self.encode(oldpw)
newpw = self.encode(newpw)
return self.conn.passwd_s(dn, oldpw, newpw, serverctrls, clientctrls)
def rename_s(self, dn, newrdn, newsuperior=None, delold=1):
# NOTICE: python-ldap of version 2.3.10 and lower does not support
# serverctrls and clientctrls for rename_s operation. Thus, these
# options are ommited from this command until really needed
assert isinstance(dn, DN)
dn = str(dn)
assert isinstance(newrdn, (DN, RDN))
newrdn = str(newrdn)
return self.conn.rename_s(dn, newrdn, newsuperior, delold)
def result(self, msgid=ldap.RES_ANY, all=1, timeout=None):
resp_type, resp_data = self.conn.result(msgid, all, timeout)
resp_data = self.convert_result(resp_data)
return resp_type, resp_data
def sasl_interactive_bind_s(self, who, auth, serverctrls=None,
clientctrls=None, sasl_flags=ldap.SASL_QUIET):
self.flush_cached_schema()
if who is None:
who = DN()
assert isinstance(who, DN)
who = str(who)
return self.conn.sasl_interactive_bind_s(who, auth, serverctrls, clientctrls, sasl_flags)
def search(self, base, scope, filterstr='(objectClass=*)', attrlist=None, attrsonly=0):
assert isinstance(base, DN)
base = str(base)
filterstr = self.encode(filterstr)
attrlist = self.encode(attrlist)
return self.conn.search(base, scope, filterstr, attrlist, attrsonly)
def search_ext(self, base, scope, filterstr='(objectClass=*)', attrlist=None, attrsonly=0, serverctrls=None, clientctrls=None, timeout=-1, sizelimit=0):
assert isinstance(base, DN)
base = str(base)
filterstr = self.encode(filterstr)
attrlist = self.encode(attrlist)
if _debug_log_ldap:
self.log.debug(
"ldap.search_ext: dn: %s\nfilter: %s\nattrs_list: %s",
base, filterstr, attrlist)
return self.conn.search_ext(base, scope, filterstr, attrlist, attrsonly, serverctrls, clientctrls, timeout, sizelimit)
def search_ext_s(self, base, scope, filterstr='(objectClass=*)', attrlist=None, attrsonly=0, serverctrls=None, clientctrls=None, timeout=-1, sizelimit=0):
assert isinstance(base, DN)
base = str(base)
filterstr = self.encode(filterstr)
attrlist = self.encode(attrlist)
ldap_result = self.conn.search_ext_s(base, scope, filterstr, attrlist, attrsonly, serverctrls, clientctrls, timeout, sizelimit)
ipa_result = self.convert_result(ldap_result)
return ipa_result
def search_s(self, base, scope, filterstr='(objectClass=*)', attrlist=None, attrsonly=0):
assert isinstance(base, DN)
base = str(base)
filterstr = self.encode(filterstr)
attrlist = self.encode(attrlist)
ldap_result = self.conn.search_s(base, scope, filterstr, attrlist, attrsonly)
ipa_result = self.convert_result(ldap_result)
return ipa_result
def search_st(self, base, scope, filterstr='(objectClass=*)', attrlist=None, attrsonly=0, timeout=-1):
assert isinstance(base, DN)
base = str(base)
filterstr = self.encode(filterstr)
attrlist = self.encode(attrlist)
ldap_result = self.conn.search_st(base, scope, filterstr, attrlist, attrsonly, timeout)
ipa_result = self.convert_result(ldap_result)
return ipa_result
def set_option(self, option, invalue):
return self.conn.set_option(option, invalue)
def simple_bind_s(self, who=None, cred='', serverctrls=None, clientctrls=None):
self.flush_cached_schema()
if who is None:
who = DN()
assert isinstance(who, DN)
who = str(who)
cred = self.encode(cred)
return self.conn.simple_bind_s(who, cred, serverctrls, clientctrls)
def start_tls_s(self):
return self.conn.start_tls_s()
def unbind_s(self):
self.flush_cached_schema()
return self.conn.unbind_s()
# Make python-ldap tuple style result compatible with Entry and Entity
# objects by allowing access to the dn (tuple index 0) via the 'dn'
# attribute name and the attr dict (tuple index 1) via the 'data'
# attribute name. Thus:
# r = result[0]
# r[0] == r.dn
# r[1] == r.data
class LDAPEntry(collections.MutableMapping):
__slots__ = ('_conn', '_dn', '_names', '_data', '_not_list', '_orig')
def __init__(self, _conn, _dn=None, _obj=None, **kwargs):
"""
LDAPEntry constructor.
Takes 1 to 3 positional arguments and an arbitrary number of keyword
arguments. The 3 forms of positional arguments are:
* LDAPEntry(entry) - create a shallow copy of an existing LDAPEntry.
* LDAPEntry(dn, entry) - create a shallow copy of an existing
LDAPEntry with a different DN.
* LDAPEntry(conn, dn, mapping) - create a new LDAPEntry using the
specified IPASimpleLDAPObject and DN and optionally initialize
attributes from the specified mapping object.
Keyword arguments can be used to override values of specific attributes.
"""
if isinstance(_conn, LDAPEntry):
assert _dn is None
_dn = _conn
_conn = _conn._conn
assert isinstance(_conn, IPASimpleLDAPObject)
if isinstance(_dn, LDAPEntry):
assert _obj is None
_obj = _dn
_dn = _dn._dn
assert isinstance(_dn, DN)
if _obj is None:
_obj = {}
self._conn = _conn
self._dn = _dn
self._names = CIDict()
self._data = {}
self._not_list = set()
self._orig = self
if isinstance(_obj, LDAPEntry):
#pylint: disable=E1103
self._names = CIDict(_obj._names)
self._data = dict(_obj._data)
self._not_list = set(_obj._not_list)
self._orig = _obj._orig
_obj = {}
self.update(_obj, **kwargs)
@property
def conn(self):
return self._conn
# properties for Entry and Entity compatibility
@property
def dn(self):
return self._dn
@dn.setter
def dn(self, value):
assert isinstance(value, DN)
self._dn = value
@property
def data(self):
# FIXME: for backwards compatibility only
return self
@property
def orig_data(self):
# FIXME: for backwards compatibility only
return self._orig
def __repr__(self):
return '%s(%r, %r)' % (type(self).__name__, self._dn, self._data)
def copy(self):
return LDAPEntry(self)
def clone(self):
result = LDAPEntry(self._conn, self._dn)
result._names = deepcopy(self._names)
result._data = deepcopy(self._data)
result._not_list = deepcopy(self._not_list)
if self._orig is not self:
result._orig = self._orig.clone()
return result
def commit(self):
"""
Make the current state of the entry a new reference point for change
tracking.
"""
self._orig = self
self._orig = self.clone()
def _attr_name(self, name):
if not isinstance(name, basestring):
raise TypeError(
"attribute name must be unicode or str, got %s object %r" % (
name.__class__.__name__, name))
if isinstance(name, str):
name = name.decode('utf-8')
return name
def __setitem__(self, name, value):
name = self._attr_name(name)
if name in self._names:
oldname = self._names[name]
if oldname != name:
for (altname, keyname) in self._names.iteritems():
if keyname == oldname:
self._names[altname] = name
del self._data[oldname]
self._not_list.discard(oldname)
else:
self._names[name] = name
if self._conn.schema is not None:
attrtype = self._conn.schema.get_obj(ldap.schema.AttributeType,
name.encode('utf-8'))
if attrtype is not None:
for altname in attrtype.names:
altname = altname.decode('utf-8')
self._names[altname] = name
if not isinstance(value, list):
if value is None:
value = []
else:
value = [value]
self._not_list.add(name)
else:
self._not_list.discard(name)
self._data[name] = value
def _get_attr_name(self, name):
name = self._attr_name(name)
name = self._names[name]
return name
def __getitem__(self, name):
# FIXME: Remove when python-ldap tuple compatibility is dropped
if name == 0:
return self._dn
elif name == 1:
return self
name = self._get_attr_name(name)
value = self._data[name]
assert isinstance(value, list)
if name in self._not_list:
assert len(value) <= 1
if value:
value = value[0]
else:
value = None
return value
def single_value(self, name, default=_missing):
"""Return a single attribute value
Checks that the attribute really has one and only one value
If the entry is missing and default is given, return the default.
If the entry is missing and default is not given, raise KeyError.
"""
try:
values = self[name]
except KeyError:
if default is _missing:
raise
return default
if not isinstance(values, list): # TODO: remove when we enforce lists
return values
if len(values) != 1:
raise ValueError(
'%s has %s values, one expected' % (name, len(values)))
return values[0]
def __delitem__(self, name):
name = self._get_attr_name(name)
for (altname, keyname) in self._names.items():
if keyname == name:
del self._names[altname]
del self._data[name]
self._not_list.discard(name)
def clear(self):
self._names.clear()
self._data.clear()
self._not_list.clear()
def __len__(self):
return len(self._data)
def __contains__(self, name):
return name in self._names
def has_key(self, name):
return name in self
def __eq__(self, other):
if not isinstance(other, LDAPEntry):
return NotImplemented
return other is self
def __ne__(self, other):
if not isinstance(other, LDAPEntry):
return NotImplemented
return other is not self
# FIXME: Remove when python-ldap tuple compatibility is dropped
def __iter__(self):
yield self._dn
yield self
# FIXME: Remove when python-ldap tuple compatibility is dropped
def iterkeys(self):
return self._data.iterkeys()
# FIXME: Remove when python-ldap tuple compatibility is dropped
def itervalues(self):
return self._data.itervalues()
# FIXME: Remove when python-ldap tuple compatibility is dropped
def iteritems(self):
return self._data.iteritems()
# FIXME: Remove when python-ldap tuple compatibility is dropped
def keys(self):
return list(self.iterkeys())
# FIXME: Remove when python-ldap tuple compatibility is dropped
def values(self):
return list(self.itervalues())
# FIXME: Remove when python-ldap tuple compatibility is dropped
def items(self):
return list(self.iteritems())
# FIXME: Remove when python-ldap tuple compatibility is dropped
def update(self, _obj={}, **kwargs):
_obj = dict(_obj, **kwargs)
super(LDAPEntry, self).update(_obj)
# FIXME: Remove when python-ldap tuple compatibility is dropped
def popitem(self):
try:
name = self.iterkeys().next()
except StopIteration:
raise KeyError
return name, self.pop(name)
def toDict(self):
# FIXME: for backwards compatibility only
"""Convert the attrs and values to a dict. The dict is keyed on the
attribute name. The value is either single value or a list of values."""
assert isinstance(self.dn, DN)
result = ipautil.CIDict(self.data)
for i in result.keys():
result[i] = ipautil.utf8_encode_values(result[i])
result['dn'] = self.dn
return result
def origDataDict(self):
"""Returns a dict of the original values of the user.
Used for updates.
"""
result = ipautil.CIDict(self.orig_data)
result['dn'] = self.dn
return result
class LDAPClient(object):
"""LDAP backend class
This class abstracts a LDAP connection, providing methods that work with
LADPEntries.
This class is not intended to be used directly; instead, use one of its
subclasses, IPAdmin or the ldap2 plugin.
"""
# rules for generating filters from entries
MATCH_ANY = '|' # (|(filter1)(filter2))
MATCH_ALL = '&' # (&(filter1)(filter2))
MATCH_NONE = '!' # (!(filter1)(filter2))
# search scope for find_entries()
SCOPE_BASE = ldap.SCOPE_BASE
SCOPE_ONELEVEL = ldap.SCOPE_ONELEVEL
SCOPE_SUBTREE = ldap.SCOPE_SUBTREE
def __init__(self, ldap_uri):
self.ldap_uri = ldap_uri
self.log = log_mgr.get_logger(self)
self._init_connection()
def _init_connection(self):
self.conn = None
def get_api(self):
"""Return the API if available, otherwise None
May be overridden in a subclass.
"""
return None
@contextlib.contextmanager
def error_handler(self, arg_desc=None):
"""Context manager that handles LDAPErrors
"""
try:
try:
yield
except ldap.TIMEOUT:
raise errors.DatabaseTimeout()
except ldap.LDAPError, e:
desc = e.args[0]['desc'].strip()
info = e.args[0].get('info', '').strip()
if arg_desc is not None:
info = "%s arguments: %s" % (info, arg_desc)
raise
except ldap.NO_SUCH_OBJECT:
raise errors.NotFound(reason=arg_desc or 'no such entry')
except ldap.ALREADY_EXISTS:
raise errors.DuplicateEntry()
except ldap.CONSTRAINT_VIOLATION:
# This error gets thrown by the uniqueness plugin
_msg = 'Another entry with the same attribute value already exists'
if info.startswith(_msg):
raise errors.DuplicateEntry()
else:
raise errors.DatabaseError(desc=desc, info=info)
except ldap.INSUFFICIENT_ACCESS:
raise errors.ACIError(info=info)
except ldap.INVALID_CREDENTIALS:
raise errors.ACIError(info="%s %s" % (info, desc))
except ldap.INAPPROPRIATE_AUTH:
raise errors.ACIError(info="%s: %s" % (desc, info))
except ldap.NO_SUCH_ATTRIBUTE:
# this is raised when a 'delete' attribute isn't found.
# it indicates the previous attribute was removed by another
# update, making the oldentry stale.
raise errors.MidairCollision()
except ldap.INVALID_SYNTAX:
raise errors.InvalidSyntax(attr=info)
except ldap.OBJECT_CLASS_VIOLATION:
raise errors.ObjectclassViolation(info=info)
except ldap.ADMINLIMIT_EXCEEDED:
raise errors.LimitsExceeded()
except ldap.SIZELIMIT_EXCEEDED:
raise errors.LimitsExceeded()
except ldap.TIMELIMIT_EXCEEDED:
raise errors.LimitsExceeded()
except ldap.NOT_ALLOWED_ON_RDN:
raise errors.NotAllowedOnRDN(attr=info)
except ldap.FILTER_ERROR:
raise errors.BadSearchFilter(info=info)
except ldap.NOT_ALLOWED_ON_NONLEAF:
raise errors.NotAllowedOnNonLeaf()
except ldap.SERVER_DOWN:
raise errors.NetworkError(uri=self.ldap_uri,
error=info)
except ldap.LOCAL_ERROR:
raise errors.ACIError(info=info)
except ldap.SUCCESS:
pass
except ldap.CONNECT_ERROR:
raise errors.DatabaseError(desc=desc, info=info)
except ldap.LDAPError, e:
if 'NOT_ALLOWED_TO_DELEGATE' in info:
raise errors.ACIError(
info="KDC returned NOT_ALLOWED_TO_DELEGATE")
self.log.debug(
'Unhandled LDAPError: %s: %s' % (type(e).__name__, str(e)))
raise errors.DatabaseError(desc=desc, info=info)
@property
def schema(self):
"""schema associated with this LDAP server"""
return self.conn.schema
def get_syntax(self, attr, value):
if self.schema is None:
return None
obj = self.schema.get_obj(ldap.schema.AttributeType, attr)
if obj is not None:
return obj.syntax
else:
return None
def has_dn_syntax(self, attr):
return self.conn.has_dn_syntax(attr)
def get_allowed_attributes(self, objectclasses, raise_on_unknown=False):
if self.schema is None:
return None
allowed_attributes = []
for oc in objectclasses:
obj = self.schema.get_obj(ldap.schema.ObjectClass, oc)
if obj is not None:
allowed_attributes += obj.must + obj.may
elif raise_on_unknown:
raise errors.NotFound(
reason=_('objectclass %s not found') % oc)
return [unicode(a).lower() for a in list(set(allowed_attributes))]
def get_single_value(self, attr):
"""
Check the schema to see if the attribute is single-valued.
If the attribute is in the schema then returns True/False
If there is a problem loading the schema or the attribute is
not in the schema return None
"""
if self.schema is None:
return None
obj = self.schema.get_obj(ldap.schema.AttributeType, attr)
return obj and obj.single_value
def make_dn_from_attr(self, attr, value, parent_dn=None):
"""
Make distinguished name from attribute.
Keyword arguments:
parent_dn -- DN of the parent entry (default '')
"""
if parent_dn is None:
parent_dn = DN()
if isinstance(value, (list, tuple)):
value = value[0]
return DN((attr, value), parent_dn)
def make_dn(self, entry_attrs, primary_key='cn', parent_dn=None):
"""
Make distinguished name from entry attributes.
Keyword arguments:
primary_key -- attribute from which to make RDN (default 'cn')
parent_dn -- DN of the parent entry (default '')
"""
assert primary_key in entry_attrs
assert isinstance(parent_dn, DN)
return DN((primary_key, entry_attrs[primary_key]), parent_dn)
def make_entry(self, _dn=None, _obj=None, **kwargs):
return LDAPEntry(self.conn, _dn, _obj, **kwargs)
# generating filters for find_entry
# some examples:
# f1 = ldap2.make_filter_from_attr(u'firstName', u'Pavel')
# f2 = ldap2.make_filter_from_attr(u'lastName', u'Zuna')
# f = ldap2.combine_filters([f1, f2], ldap2.MATCH_ALL)
# # f should be (&(firstName=Pavel)(lastName=Zuna))
# # it should be equivalent to:
# entry_attrs = {u'firstName': u'Pavel', u'lastName': u'Zuna'}
# f = ldap2.make_filter(entry_attrs, rules=ldap2.MATCH_ALL)
def combine_filters(self, filters, rules='|'):
"""
Combine filters into one for ldap2.find_entries.
Keyword arguments:
rules -- see ldap2.make_filter
"""
assert isinstance(filters, (list, tuple))
filters = [f for f in filters if f]
if filters and rules == self.MATCH_NONE: # unary operator
return '(%s%s)' % (self.MATCH_NONE,
self.combine_filters(filters, self.MATCH_ANY))
if len(filters) > 1:
flt = '(%s' % rules
else:
flt = ''
for f in filters:
if not f.startswith('('):
f = '(%s)' % f
flt = '%s%s' % (flt, f)
if len(filters) > 1:
flt = '%s)' % flt
return flt
def make_filter_from_attr(
self, attr, value, rules='|', exact=True,
leading_wildcard=True, trailing_wildcard=True):
"""
Make filter for ldap2.find_entries from attribute.
Keyword arguments:
rules -- see ldap2.make_filter
exact -- boolean, True - make filter as (attr=value)
False - make filter as (attr=*value*)
leading_wildcard -- boolean:
True - allow heading filter wildcard when exact=False
False - forbid heading filter wildcard when exact=False
trailing_wildcard -- boolean:
True - allow trailing filter wildcard when exact=False
False - forbid trailing filter wildcard when exact=False
"""
if isinstance(value, (list, tuple)):
if rules == self.MATCH_NONE:
make_filter_rules = self.MATCH_ANY
else:
make_filter_rules = rules
flts = [
self.make_filter_from_attr(
attr, v, exact=exact,
leading_wildcard=leading_wildcard,
trailing_wildcard=trailing_wildcard)
for v in value
]
return self.combine_filters(flts, rules)
elif value is not None:
value = ldap.filter.escape_filter_chars(value_to_utf8(value))
if not exact:
template = '%s'
if leading_wildcard:
template = '*' + template
if trailing_wildcard:
template = template + '*'
value = template % value
if rules == self.MATCH_NONE:
return '(!(%s=%s))' % (attr, value)
return '(%s=%s)' % (attr, value)
return ''
def make_filter(
self, entry_attrs, attrs_list=None, rules='|', exact=True,
leading_wildcard=True, trailing_wildcard=True):
"""
Make filter for ldap2.find_entries from entry attributes.
Keyword arguments:
attrs_list -- list of attributes to use, all if None (default None)
rules -- specifies how to determine a match (default ldap2.MATCH_ANY)
exact -- boolean, True - make filter as (attr=value)
False - make filter as (attr=*value*)
leading_wildcard -- boolean:
True - allow heading filter wildcard when exact=False
False - forbid heading filter wildcard when exact=False
trailing_wildcard -- boolean:
True - allow trailing filter wildcard when exact=False
False - forbid trailing filter wildcard when exact=False
rules can be one of the following:
ldap2.MATCH_NONE - match entries that do not match any attribute
ldap2.MATCH_ALL - match entries that match all attributes
ldap2.MATCH_ANY - match entries that match any of attribute
"""
if rules == self.MATCH_NONE:
make_filter_rules = self.MATCH_ANY
else:
make_filter_rules = rules
flts = []
if attrs_list is None:
for (k, v) in entry_attrs.iteritems():
flts.append(
self.make_filter_from_attr(
k, v, make_filter_rules, exact,
leading_wildcard, trailing_wildcard)
)
else:
for a in attrs_list:
value = entry_attrs.get(a, None)
if value is not None:
flts.append(
self.make_filter_from_attr(
a, value, make_filter_rules, exact,
leading_wildcard, trailing_wildcard)
)
return self.combine_filters(flts, rules)
def get_entries(self, base_dn, scope=ldap.SCOPE_SUBTREE, filter=None,
attrs_list=None):
"""Return a list of matching entries.
Raises an error if the list is truncated by the server
:param base_dn: dn of the entry at which to start the search
:param scope: search scope, see LDAP docs (default ldap2.SCOPE_SUBTREE)
:param filter: LDAP filter to apply
:param attrs_list: ist of attributes to return, all if None (default)
Use the find_entries method for more options.
"""
entries, truncated = self.find_entries(
base_dn=base_dn, scope=scope, filter=filter, attrs_list=attrs_list)
if truncated:
raise errors.LimitsExceeded()
return entries
def find_entries(self, filter=None, attrs_list=None, base_dn=None,
scope=ldap.SCOPE_SUBTREE, time_limit=None,
size_limit=None, search_refs=False):
"""
Return a list of entries and indication of whether the results were
truncated ([(dn, entry_attrs)], truncated) matching specified search
parameters followed by truncated flag. If the truncated flag is True,
search hit a server limit and its results are incomplete.
Keyword arguments:
attrs_list -- list of attributes to return, all if None (default None)
base_dn -- dn of the entry at which to start the search (default '')
scope -- search scope, see LDAP docs (default ldap2.SCOPE_SUBTREE)
time_limit -- time limit in seconds (default use IPA config values)
size_limit -- size (number of entries returned) limit
(default use IPA config values)
search_refs -- allow search references to be returned
(default skips these entries)
"""
if base_dn is None:
base_dn = DN()
assert isinstance(base_dn, DN)
if not filter:
filter = '(objectClass=*)'
res = []
truncated = False
if time_limit is None or size_limit is None:
config = self.get_ipa_config()
if time_limit is None:
time_limit = config.get('ipasearchtimelimit', [-1])[0]
if size_limit is None:
size_limit = config.get('ipasearchrecordslimit', [0])[0]
if time_limit == 0:
time_limit = -1
if not isinstance(size_limit, int):
size_limit = int(size_limit)
if not isinstance(time_limit, float):
time_limit = float(time_limit)
if attrs_list:
attrs_list = list(set(attrs_list))
# pass arguments to python-ldap
with self.error_handler():
try:
id = self.conn.search_ext(
base_dn, scope, filter, attrs_list, timeout=time_limit,
sizelimit=size_limit
)
while True:
(objtype, res_list) = self.conn.result(id, 0)
if not res_list:
break
if (objtype == ldap.RES_SEARCH_ENTRY or
(search_refs and
objtype == ldap.RES_SEARCH_REFERENCE)):
res.append(res_list[0])
except (ldap.ADMINLIMIT_EXCEEDED, ldap.TIMELIMIT_EXCEEDED,
ldap.SIZELIMIT_EXCEEDED), e:
truncated = True
if not res and not truncated:
raise errors.NotFound(reason='no such entry')
if attrs_list and (
'memberindirect' in attrs_list or '*' in attrs_list):
for r in res:
if not 'member' in r[1]:
continue
else:
members = r[1]['member']
indirect = self.get_members(
r[0], members, membertype=MEMBERS_INDIRECT,
time_limit=time_limit, size_limit=size_limit)
if len(indirect) > 0:
r[1]['memberindirect'] = indirect
if attrs_list and (
'memberofindirect' in attrs_list or '*' in attrs_list):
for r in res:
if 'memberof' in r[1]:
memberof = r[1]['memberof']
del r[1]['memberof']
elif 'memberOf' in r[1]:
memberof = r[1]['memberOf']
del r[1]['memberOf']
else:
continue
direct, indirect = self.get_memberof(
r[0], memberof, time_limit=time_limit,
size_limit=size_limit)
if len(direct) > 0:
r[1]['memberof'] = direct
if len(indirect) > 0:
r[1]['memberofindirect'] = indirect
return (res, truncated)
def find_entry_by_attr(self, attr, value, object_class, attrs_list=None,
base_dn=None):
"""
Find entry (dn, entry_attrs) by attribute and object class.
Keyword arguments:
attrs_list - list of attributes to return, all if None (default None)
base_dn - dn of the entry at which to start the search (default '')
"""
if base_dn is None:
base_dn = DN()
assert isinstance(base_dn, DN)
search_kw = {attr: value, 'objectClass': object_class}
filter = self.make_filter(search_kw, rules=self.MATCH_ALL)
(entries, truncated) = self.find_entries(filter, attrs_list, base_dn)
if len(entries) > 1:
raise errors.SingleMatchExpected(found=len(entries))
else:
if truncated:
raise errors.LimitsExceeded()
else:
return entries[0]
def get_entry(self, dn, attrs_list=None, time_limit=None,
size_limit=None):
"""
Get entry (dn, entry_attrs) by dn.
Keyword arguments:
attrs_list - list of attributes to return, all if None (default None)
"""
assert isinstance(dn, DN)
(entry, truncated) = self.find_entries(
None, attrs_list, dn, self.SCOPE_BASE, time_limit=time_limit,
size_limit=size_limit
)
if truncated:
raise errors.LimitsExceeded()
return entry[0]
def get_ipa_config(self, attrs_list=None):
"""Returns the IPA configuration entry.
Overriden in the subclasses that have access to IPA configuration.
"""
return {}
def get_memberof(self, entry_dn, memberof, time_limit=None,
size_limit=None):
"""
Examine the objects that an entry is a member of and determine if they
are a direct or indirect member of that group.
entry_dn: dn of the entry we want the direct/indirect members of
memberof: the memberOf attribute for entry_dn
Returns two memberof lists: (direct, indirect)
"""
assert isinstance(entry_dn, DN)
self.log.debug(
"get_memberof: entry_dn=%s memberof=%s", entry_dn, memberof)
if not type(memberof) in (list, tuple):
return ([], [])
if len(memberof) == 0:
return ([], [])
search_entry_dn = ldap.filter.escape_filter_chars(str(entry_dn))
attr_list = ["memberof"]
searchfilter = "(|(member=%s)(memberhost=%s)(memberuser=%s))" % (
search_entry_dn, search_entry_dn, search_entry_dn)
# Search only the groups for which the object is a member to
# determine if it is directly or indirectly associated.
results = []
for group in memberof:
assert isinstance(group, DN)
try:
result, truncated = self.find_entries(
searchfilter, attr_list,
group, time_limit=time_limit, size_limit=size_limit,
scope=ldap.SCOPE_BASE)
results.extend(list(result))
except errors.NotFound:
pass
direct = []
# If there is an exception here, it is likely due to a failure in
# referential integrity. All members should have corresponding
# memberOf entries.
indirect = list(memberof)
for r in results:
direct.append(r[0])
try:
indirect.remove(r[0])
except ValueError, e:
self.log.info(
'Failed to remove indirect entry %s from %s',
r[0], entry_dn)
raise e
self.log.debug(
"get_memberof: result direct=%s indirect=%s", direct, indirect)
return (direct, indirect)
def get_members(self, group_dn, members, attr_list=[],
membertype=MEMBERS_ALL, time_limit=None, size_limit=None):
"""Do a memberOf search of groupdn and return the attributes in
attr_list (an empty list returns all attributes).
membertype = MEMBERS_ALL all members returned
membertype = MEMBERS_DIRECT only direct members are returned
membertype = MEMBERS_INDIRECT only inherited members are returned
Members may be included in a group as a result of being a member
of a group that is a member of the group being queried.
Returns a list of DNs.
"""
assert isinstance(group_dn, DN)
if membertype not in [MEMBERS_ALL, MEMBERS_DIRECT, MEMBERS_INDIRECT]:
return None
self.log.debug(
"get_members: group_dn=%s members=%s membertype=%s",
group_dn, members, membertype)
search_group_dn = ldap.filter.escape_filter_chars(str(group_dn))
searchfilter = "(memberof=%s)" % search_group_dn
attr_list.append("member")
# Verify group membership
results = []
if membertype == MEMBERS_ALL or membertype == MEMBERS_INDIRECT:
api = self.get_api()
if api:
user_container_dn = DN(api.env.container_user, api.env.basedn)
host_container_dn = DN(api.env.container_host, api.env.basedn)
else:
user_container_dn = host_container_dn = None
checkmembers = set(DN(x) for x in members)
checked = set()
while checkmembers:
member_dn = checkmembers.pop()
checked.add(member_dn)
# No need to check entry types that are not nested for
# additional members
if user_container_dn and (
member_dn.endswith(user_container_dn) or
member_dn.endswith(host_container_dn)):
results.append([member_dn, {}])
continue
try:
result, truncated = self.find_entries(
searchfilter, attr_list, member_dn,
time_limit=time_limit, size_limit=size_limit,
scope=ldap.SCOPE_BASE)
if truncated:
raise errors.LimitsExceeded()
results.append(list(result[0]))
for m in result[0][1].get('member', []):
# This member may contain other members, add it to our
# candidate list
if m not in checked:
checkmembers.add(m)
except errors.NotFound:
pass
if membertype == MEMBERS_ALL:
entries = []
for e in results:
entries.append(e[0])
return entries
dn, group = self.get_entry(
group_dn, ['member'],
size_limit=size_limit, time_limit=time_limit)
real_members = group.get('member', [])
entries = []
for e in results:
if e[0] not in real_members and e[0] not in entries:
if membertype == MEMBERS_INDIRECT:
entries.append(e[0])
else:
if membertype == MEMBERS_DIRECT:
entries.append(e[0])
self.log.debug("get_members: result=%s", entries)
return entries
def _get_dn_and_attrs(self, entry_or_dn, entry_attrs):
"""Helper for legacy calling style for {add,update}_entry
"""
if entry_attrs is None:
return entry_or_dn.dn, entry_or_dn
else:
assert isinstance(entry_or_dn, DN)
entry_attrs = self.make_entry(entry_or_dn, entry_attrs)
for key, value in entry_attrs.items():
if value is None:
entry_attrs[key] = []
return entry_or_dn, entry_attrs
def add_entry(self, entry, entry_attrs=None):
"""Create a new entry.
This should be called as add_entry(entry).
The legacy two-argument variant is:
add_entry(dn, entry_attrs)
"""
dn, attrs = self._get_dn_and_attrs(entry, entry_attrs)
# remove all [] values (python-ldap hates 'em)
attrs = dict((k, v) for k, v in attrs.iteritems()
# FIXME: Once entry values are always lists, this condition can
# be just "if v":
if v is not None and v != [])
with self.error_handler():
self.conn.add_s(dn, attrs.items())
def update_entry_rdn(self, dn, new_rdn, del_old=True):
"""
Update entry's relative distinguished name.
Keyword arguments:
del_old -- delete old RDN value (default True)
"""
assert isinstance(dn, DN)
assert isinstance(new_rdn, RDN)
if dn[0] == new_rdn:
raise errors.EmptyModlist()
with self.error_handler():
self.conn.rename_s(dn, new_rdn, delold=int(del_old))
time.sleep(.3) # Give memberOf plugin a chance to work
def _generate_modlist(self, dn, entry_attrs):
assert isinstance(dn, DN)
# get original entry
dn, entry_attrs_old = self.get_entry(dn, entry_attrs.keys())
# generate modlist
# for multi value attributes: no MOD_REPLACE to handle simultaneous
# updates better
# for single value attribute: always MOD_REPLACE
modlist = []
for (k, v) in entry_attrs.iteritems():
if v is None and k in entry_attrs_old:
modlist.append((ldap.MOD_DELETE, k, None))
else:
if not isinstance(v, (list, tuple)):
v = [v]
v = set(filter(lambda value: value is not None, v))
old_v = set(entry_attrs_old.get(k.lower(), []))
# FIXME: Convert all values to either unicode, DN or str
# before detecting value changes (see IPASimpleLDAPObject for
# supported types).
# This conversion will set a common ground for the comparison.
#
# This fix can be removed when ticket 2265 is fixed and our
# encoded entry_attrs' types will match get_entry result
try:
v = set(
unicode_from_utf8(self.conn.encode(value))
if not isinstance(value, (DN, str, unicode))
else value for value in v)
except Exception, e:
# Rather let the value slip in modlist than let ldap2 crash
self.log.error(
"Cannot convert attribute '%s' for modlist "
"for modlist comparison: %s", k, e)
adds = list(v.difference(old_v))
rems = list(old_v.difference(v))
is_single_value = self.get_single_value(k)
value_count = len(old_v) + len(adds) - len(rems)
if is_single_value and value_count > 1:
raise errors.OnlyOneValueAllowed(attr=k)
force_replace = False
if len(v) > 0 and len(v.intersection(old_v)) == 0:
force_replace = True
if adds:
if force_replace:
modlist.append((ldap.MOD_REPLACE, k, adds))
else:
modlist.append((ldap.MOD_ADD, k, adds))
if rems:
if not force_replace:
modlist.append((ldap.MOD_DELETE, k, rems))
return modlist
def update_entry(self, entry, entry_attrs=None):
"""Update entry's attributes.
This should be called as update_entry(entry).
The legacy two-argument variant is:
update_entry(dn, entry_attrs)
"""
dn, attrs = self._get_dn_and_attrs(entry, entry_attrs)
# generate modlist
modlist = self._generate_modlist(dn, attrs)
if not modlist:
raise errors.EmptyModlist()
# pass arguments to python-ldap
with self.error_handler():
self.conn.modify_s(dn, modlist)
def delete_entry(self, entry_or_dn):
"""Delete an entry given either the DN or the entry itself"""
if isinstance(entry_or_dn, DN):
dn = entry_or_dn
else:
dn = entry_or_dn.dn
with self.error_handler():
self.conn.delete_s(dn)
class IPAdmin(LDAPClient):
def __get_ldap_uri(self, protocol):
if protocol == 'ldaps':
return 'ldaps://%s' % format_netloc(self.host, self.port)
elif protocol == 'ldapi':
return 'ldapi://%%2fvar%%2frun%%2fslapd-%s.socket' % (
"-".join(self.realm.split(".")))
elif protocol == 'ldap':
return 'ldap://%s' % format_netloc(self.host, self.port)
else:
raise ValueError('Protocol %r not supported' % protocol)
def __guess_protocol(self):
"""Return the protocol to use based on flags passed to the constructor
Only used when "protocol" is not specified explicitly.
If a CA certificate is provided then it is assumed that we are
doing SSL client authentication with proxy auth.
If a CA certificate is not present then it is assumed that we are
using a forwarded kerberos ticket for SASL auth. SASL provides
its own encryption.
"""
if self.cacert is not None:
return 'ldaps'
elif self.ldapi:
return 'ldapi'
else:
return 'ldap'
def __init__(self, host='', port=389, cacert=None, debug=None, ldapi=False,
realm=None, protocol=None, force_schema_updates=True,
start_tls=False, ldap_uri=None, no_schema=False,
decode_attrs=True, sasl_nocanon=False, demand_cert=False):
self.conn = None
log_mgr.get_logger(self, True)
if debug and debug.lower() == "on":
ldap.set_option(ldap.OPT_DEBUG_LEVEL,255)
if cacert is not None:
ldap.set_option(ldap.OPT_X_TLS_CACERTFILE, cacert)
self.port = port
self.host = host
self.cacert = cacert
self.ldapi = ldapi
self.realm = realm
self.suffixes = {}
if not ldap_uri:
ldap_uri = self.__get_ldap_uri(protocol or self.__guess_protocol())
LDAPClient.__init__(self, ldap_uri)
with self.error_handler():
self.conn = IPASimpleLDAPObject(ldap_uri,
force_schema_updates=True,
no_schema=no_schema,
decode_attrs=decode_attrs)
if demand_cert:
ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, True)
self.conn.set_option(ldap.OPT_X_TLS_DEMAND, True)
if sasl_nocanon:
self.conn.set_option(ldap.OPT_X_SASL_NOCANON, ldap.OPT_ON)
if start_tls:
self.conn.start_tls_s()
def __str__(self):
return self.host + ":" + str(self.port)
def __wait_for_connection(self, timeout):
lurl = ldapurl.LDAPUrl(self.ldap_uri)
if lurl.urlscheme == 'ldapi':
wait_for_open_socket(lurl.hostport, timeout)
else:
(host,port) = lurl.hostport.split(':')
wait_for_open_ports(host, int(port), timeout)
def __bind_with_wait(self, bind_func, timeout, *args, **kwargs):
with self.error_handler():
try:
bind_func(*args, **kwargs)
except (ldap.CONNECT_ERROR, ldap.SERVER_DOWN), e:
if not timeout or 'TLS' in e.args[0].get('info', ''):
# No connection to continue on if we have a TLS failure
# https://bugzilla.redhat.com/show_bug.cgi?id=784989
raise
self.__wait_for_connection(timeout)
bind_func(*args, **kwargs)
def do_simple_bind(self, binddn=DN(('cn', 'directory manager')), bindpw="",
timeout=DEFAULT_TIMEOUT):
self.__bind_with_wait(self.conn.simple_bind_s, timeout, binddn, bindpw)
def do_sasl_gssapi_bind(self, timeout=DEFAULT_TIMEOUT):
self.__bind_with_wait(
self.conn.sasl_interactive_bind_s, timeout, None, SASL_GSSAPI)
def do_external_bind(self, user_name=None, timeout=DEFAULT_TIMEOUT):
auth_tokens = ldap.sasl.external(user_name)
self.__bind_with_wait(
self.conn.sasl_interactive_bind_s, timeout, None, auth_tokens)
def updateEntry(self,dn,oldentry,newentry):
# FIXME: for backwards compatibility only
"""This wraps the mod function. It assumes that the entry is already
populated with all of the desired objectclasses and attributes"""
assert isinstance(dn, DN)
modlist = self.generateModList(oldentry, newentry)
if len(modlist) == 0:
raise errors.EmptyModlist
with self.error_handler():
self.modify_s(dn, modlist)
return True
def generateModList(self, old_entry, new_entry):
# FIXME: for backwards compatibility only
"""A mod list generator that computes more precise modification lists
than the python-ldap version. For single-value attributes always
use a REPLACE operation, otherwise use ADD/DEL.
"""
# Some attributes, like those in cn=config, need to be replaced
# not deleted/added.
FORCE_REPLACE_ON_UPDATE_ATTRS = ('nsslapd-ssl-check-hostname', 'nsslapd-lookthroughlimit', 'nsslapd-idlistscanlimit', 'nsslapd-anonlimitsdn', 'nsslapd-minssf-exclude-rootdse')
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)
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)
# We used to convert to sets and use difference to calculate
# the changes but this did not preserve order which is important
# particularly for schema
adds = [x for x in new_values if x not in old_values]
removes = [x for x in old_values if x not in new_values]
if len(adds) == 0 and len(removes) == 0:
continue
is_single_value = self.get_single_value(key)
force_replace = False
if key in FORCE_REPLACE_ON_UPDATE_ATTRS or is_single_value:
force_replace = True
# You can't remove schema online. An add will automatically
# replace any existing schema.
if old_entry.get('dn', DN()) == DN(('cn', 'schema')):
if len(adds) > 0:
modlist.append((ldap.MOD_ADD, key, adds))
else:
if adds:
if force_replace:
modlist.append((ldap.MOD_REPLACE, key, adds))
else:
modlist.append((ldap.MOD_ADD, key, adds))
if removes:
if not force_replace:
modlist.append((ldap.MOD_DELETE, key, removes))
elif new_values == []: # delete an empty value
modlist.append((ldap.MOD_DELETE, key, removes))
return modlist
def modify_s(self, *args, **kwargs):
# FIXME: for backwards compatibility only
return self.conn.modify_s(*args, **kwargs)
def set_option(self, *args, **kwargs):
# FIXME: for backwards compatibility only
return self.conn.set_option(*args, **kwargs)
def encode(self, *args, **kwargs):
# FIXME: for backwards compatibility only
return self.conn.encode(*args, **kwargs)
def unbind(self, *args, **kwargs):
return self.conn.unbind_s(*args, **kwargs)
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