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# Authors: Rob Crittenden <rcritten@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; version 2 only
#
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import ldap
from ipa_server.context import context
import ipautil
# temporary
import krbV
krbctx = krbV.default_context()
realm = krbctx.default_realm
basedn = ipautil.realm_to_suffix(realm)
DefaultUserContainer = "cn=users,cn=accounts"
DefaultGroupContainer = "cn=groups,cn=accounts"
DefaultServiceContainer = "cn=services,cn=accounts"
def convert_entry(ent):
entry = dict(ent.data)
entry['dn'] = ent.dn
# For now convert single entry lists to a string for the ui.
# TODO: we need to deal with multi-values better
for key,value in entry.iteritems():
if isinstance(value,list) or isinstance(value,tuple):
if len(value) == 0:
entry[key] = ''
elif len(value) == 1:
entry[key] = value[0]
return entry
def convert_scalar_values(orig_dict):
"""LDAP update dicts expect all values to be a list (except for dn).
This method converts single entries to a list."""
new_dict={}
for (k,v) in orig_dict.iteritems():
if not isinstance(v, list) and k != 'dn':
v = [v]
new_dict[k] = v
return new_dict
# TODO: rethink the get_entry vs get_list API calls.
# they currently restrict the data coming back without
# restricting scope. For now adding a get_base/sub_entry()
# calls, but the API isn't great.
def get_entry (base, scope, searchfilter, sattrs=None):
"""Get a specific entry (with a parametized scope).
Return as a dict of values.
Multi-valued fields are represented as lists.
"""
ent=""
ent = context.conn.getConn().getEntry(base, scope, searchfilter, sattrs)
return convert_entry(ent)
def get_base_entry (base, searchfilter, sattrs=None):
"""Get a specific entry (with a scope of BASE).
Return as a dict of values.
Multi-valued fields are represented as lists.
"""
return get_entry(base, ldap.SCOPE_BASE, searchfilter, sattrs)
def get_sub_entry (base, searchfilter, sattrs=None):
"""Get a specific entry (with a scope of SUB).
Return as a dict of values.
Multi-valued fields are represented as lists.
"""
return get_entry(base, ldap.SCOPE_SUBTREE, searchfilter, sattrs)
def get_list (base, searchfilter, sattrs=None):
"""Gets a list of entries. Each is converted to a dict of values.
Multi-valued fields are represented as lists.
"""
entries = []
entries = context.conn.getConn().getList(base, ldap.SCOPE_SUBTREE, searchfilter, sattrs)
return map(convert_entry, entries)
# General searches
def get_entry_by_dn (dn, sattrs=None):
"""Get a specific entry. Return as a dict of values.
Multi-valued fields are represented as lists.
"""
searchfilter = "(objectClass=*)"
# logging.info("IPA: get_entry_by_dn '%s'" % dn)
return get_base_entry(dn, searchfilter, sattrs)
# User support
def is_user_unique(uid):
"""Return True if the uid is unique in the tree, False otherwise."""
# FIXME
# uid = self.__safe_filter(uid)
searchfilter = "(&(uid=%s)(objectclass=posixAccount))" % uid
try:
entry = get_sub_entry("cn=accounts," + basedn, searchfilter, ['dn','uid'])
return False
# except ipaerror.exception_for(ipaerror.LDAP_NOT_FOUND):
except Exception:
return True
def get_user_by_uid (uid, sattrs):
"""Get a specific user's entry. Return as a dict of values.
Multi-valued fields are represented as lists.
"""
if not isinstance(uid,basestring) or len(uid) == 0:
raise SyntaxError("uid is not a string")
# raise ipaerror.gen_exception(ipaerror.INPUT_INVALID_PARAMETER)
if sattrs is not None and not isinstance(sattrs,list):
raise SyntaxError("sattrs is not a list")
# raise ipaerror.gen_exception(ipaerror.INPUT_INVALID_PARAMETER)
# logging.info("IPA: get_user_by_uid '%s'" % uid)
# uid = self.__safe_filter(uid)
searchfilter = "(uid=" + uid + ")"
return get_sub_entry("cn=accounts," + basedn, searchfilter, sattrs)
def uid_too_long(uid):
"""Verify that the new uid is within the limits we set. This is a
very narrow test.
Returns True if it is longer than allowed
False otherwise
"""
if not isinstance(uid,basestring) or len(uid) == 0:
# It is bad, but not too long
return False
# logging.debug("IPA: __uid_too_long(%s)" % uid)
try:
config = get_ipa_config()
maxlen = int(config.get('ipamaxusernamelength', 0))
if maxlen > 0 and len(uid) > maxlen:
return True
except Exception, e:
# logging.debug("There was a problem " + str(e))
pass
return False
def update_entry (entry):
"""Update an LDAP entry
entry is a dict
This refreshes the record from LDAP in order to obtain the list of
attributes that has changed.
"""
attrs = entry.keys()
o = get_base_entry(entry['dn'], "objectclass=*", attrs)
oldentry = convert_scalar_values(o)
newentry = convert_scalar_values(entry)
# Should be able to get this from either the old or new entry
# but just in case someone has decided to try changing it, use the
# original
try:
moddn = oldentry['dn']
except KeyError, e:
# FIXME: return a missing DN error message
raise e
return context.conn.getConn().updateEntry(moddn, oldentry, newentry)
def add_entry(entry):
"""Add a new entry"""
return context.conn.getConn().addEntry(entry)
def uniq_list(x):
"""Return a unique list, preserving order and ignoring case"""
myset = {}
return [myset.setdefault(e.lower(),e) for e in x if e.lower() not in myset]
def get_schema():
"""Retrieves the current LDAP schema from the LDAP server."""
schema_entry = get_base_entry("", "objectclass=*", ['dn','subschemasubentry'])
schema_cn = schema_entry.get('subschemasubentry')
schema = get_base_entry(schema_cn, "objectclass=*", ['*'])
return schema
def get_objectclasses():
"""Returns a list of available objectclasses that the LDAP
server supports. This parses out the syntax, attributes, etc
and JUST returns a lower-case list of the names."""
schema = get_schema()
objectclasses = schema.get('objectclasses')
# Convert this list into something more readable
result = []
for i in range(len(objectclasses)):
oc = objectclasses[i].lower().split(" ")
result.append(oc[3].replace("'",""))
return result
def get_ipa_config():
"""Retrieve the IPA configuration"""
searchfilter = "cn=ipaconfig"
try:
config = get_sub_entry("cn=etc," + basedn, searchfilter)
except ldap.NO_SUCH_OBJECT, e:
# FIXME
raise e
return config
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