sssd.git - Experimental work on SSSD - Systen Security Services Daemon

diff options

author	Jakub Hrozek <jhrozek@redhat.com>	2013-06-07 07:19:27 +0200
committer	Jakub Hrozek <jhrozek@redhat.com>	2013-06-10 11:31:20 +0200
commit	265ce7e9fcd9aeaaac1a36c4446072f57f3bd0c2 (patch)
tree	4e1512ef0917dc22963596d330a710f70a9f4e69 /src/tests/sysdb_ssh-tests.c
parent	fbd63f8f920a2591310d601b01c7b79aa4023a95 (diff)

dyndns: Fix NULL check

Diffstat (limited to 'src/tests/sysdb_ssh-tests.c')

0 files changed, 0 insertions, 0 deletions

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#! /usr/bin/python -E
# Authors: Rich Megginson <richm@redhat.com>
#          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 or later
#
# 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 sys
import os
import os.path
import popen2
import base64
import urllib
import urllib2
import socket
import ldif
import re
import string
import ldap
import cStringIO
import time
import operator
import struct
import ldap.sasl
from ldap.controls import LDAPControl,DecodeControlTuples,EncodeControlTuples
from ldap.ldapobject import SimpleLDAPObject
from ipa import ipaerror, ipautil

# Global variable to define SASL auth
sasl_auth = ldap.sasl.sasl({},'GSSAPI')

class Entry:
    """This class represents an LDAP Entry object.  An LDAP entry consists of a DN
    and a list of attributes.  Each attribute consists of a name and a list of
    values.  In python-ldap, entries are returned as a list of 2-tuples.
    Instance variables:
    dn - string - the string DN of the entry
    data - CIDict - case insensitive dict of the attributes and values"""

    def __init__(self,entrydata):
        """data is the raw data returned from the python-ldap result method, which is
        a search result entry or a reference or None.
        If creating a new empty entry, data is the string DN."""
        if entrydata:
            if isinstance(entrydata,tuple):
                self.dn = entrydata[0]
                self.data = ipautil.CIDict(entrydata[1])
            elif isinstance(entrydata,str) or isinstance(entrydata,unicode):
                self.dn = entrydata
                self.data = ipautil.CIDict()
        else:
            self.dn = ''
            self.data = ipautil.CIDict()

    def __nonzero__(self):
        """This allows us to do tests like if entry: returns false if there is no data,
        true otherwise"""
        return self.data != None and len(self.data) > 0

    def hasAttr(self,name):
        """Return True if this entry has an attribute named name, False otherwise"""
        return self.data and self.data.has_key(name)

    def __getattr__(self,name):
        """If name is the name of an LDAP attribute, return the first value for that
        attribute - equivalent to getValue - this allows the use of
        entry.cn
        instead of
        entry.getValue('cn')
        This also allows us to return None if an attribute is not found rather than
        throwing an exception"""
        return self.getValue(name)

    def getValues(self,name):
        """Get the list (array) of values for the attribute named name"""
        return self.data.get(name)

    def getValue(self,name):
        """Get the first value for the attribute named name"""
        return self.data.get(name,[None])[0]

    def setValue(self,name,*value):
        """Value passed in may be a single value, several values, or a single sequence.
        For example:
           ent.setValue('name', 'value')
           ent.setValue('name', 'value1', 'value2', ..., 'valueN')
           ent.setValue('name', ['value1', 'value2', ..., 'valueN'])
           ent.setValue('name', ('value1', 'value2', ..., 'valueN'))
        Since *value is a tuple, we may have to extract a list or tuple from that
        tuple as in the last two examples above"""
        if isinstance(value[0],list) or isinstance(value[0],tuple):
            self.data[name] = value[0]
        else:
            self.data[name] = value

    setValues = setValue

    def toTupleList(self):
        """Convert the attrs and values to a list of 2-tuples.  The first element
        of the tuple is the attribute name.  The second element is either a
        single value or a list of values."""
        return self.data.items()

    def __str__(self):
        """Convert the Entry to its LDIF representation"""
        return self.__repr__()

    # the ldif class base64 encodes some attrs which I would rather see in raw form - to
    # encode specific attrs as base64, add them to the list below
    ldif.safe_string_re = re.compile('^$')
    base64_attrs = ['nsstate', 'krbprincipalkey', 'krbExtraData']

    def __repr__(self):
        """Convert the Entry to its LDIF representation"""
        sio = cStringIO.StringIO()
        # what's all this then?  the unparse method will currently only accept
        # a list or a dict, not a class derived from them.  self.data is a
        # cidict, so unparse barfs on it.  I've filed a bug against python-ldap,
        # but in the meantime, we have to convert to a plain old dict for printing
        # I also don't want to see wrapping, so set the line width really high (1000)
        newdata = {}
        newdata.update(self.data)
        ldif.LDIFWriter(sio,Entry.base64_attrs,1000).unparse(self.dn,newdata)
        return sio.getvalue()

def wrapper(f,name):
    """This is the method that wraps all of the methods of the superclass.  This seems
    to need to be an unbound method, that's why it's outside of IPAdmin.  Perhaps there
    is some way to do this with the new classmethod or staticmethod of 2.4.
    Basically, we replace every call to a method in SimpleLDAPObject (the superclass
    of IPAdmin) with a call to inner.  The f argument to wrapper is the bound method
    of IPAdmin (which is inherited from the superclass).  Bound means that it will implicitly
    be called with the self argument, it is not in the args list.  name is the name of
    the method to call.  If name is a method that returns entry objects (e.g. result),
    we wrap the data returned by an Entry class.  If name is a method that takes an entry
    argument, we extract the raw data from the entry object to pass in."""
    def inner(*args, **kargs):
        if name == 'result':
            type, data = f(*args, **kargs)
            # data is either a 2-tuple or a list of 2-tuples
            # print data
            if data:
                if isinstance(data,tuple):
                    return type, Entry(data)
                elif isinstance(data,list):
                    return type, [Entry(x) for x in data]
                else:
                    raise TypeError, "unknown data type %s returned by result" % type(data)
            else:
                return type, data
        elif name.startswith('add'):
            # the first arg is self
            # the second and third arg are the dn and the data to send
            # We need to convert the Entry into the format used by
            # python-ldap
            ent = args[0]
            if isinstance(ent,Entry):
                return f(ent.dn, ent.toTupleList(), *args[2:])
            else:
                return f(*args, **kargs)
        else:
            return f(*args, **kargs)
    return inner

class IPAdmin(SimpleLDAPObject):
    CFGSUFFIX = "o=NetscapeRoot"
    DEFAULT_USER_ID = "nobody"
    
    def __initPart2(self):
        if self.binddn and len(self.binddn) and not hasattr(self,'sroot'):
            try:
                ent = self.getEntry('cn=config', ldap.SCOPE_BASE, '(objectclass=*)',
                                    [ 'nsslapd-instancedir', 'nsslapd-errorlog' ])
                instdir = ent.getValue('nsslapd-instancedir')
                self.sroot, self.inst = re.match(r'(.*)[\/]slapd-(\w+)$', instdir).groups()
                self.errlog = ent.getValue('nsslapd-errorlog')
            except (ldap.INSUFFICIENT_ACCESS, ldap.CONNECT_ERROR,
                    ipaerror.exception_for(ipaerror.LDAP_NOT_FOUND)):
                pass # usually means 
#                print "ignored exception"
            except ldap.LDAPError, e:
                print "caught exception ", e
                raise ipaerror.gen_exception(ipaerror.LDAP_DATABASE_ERROR, None, e)

    def __localinit__(self):
        """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:
            SimpleLDAPObject.__init__(self,'ldaps://%s:%d' % (self.host,self.port))
        else:
            SimpleLDAPObject.__init__(self,'ldap://%s:%d' % (self.host,self.port))

    def __init__(self,host,port,cacert,bindcert,bindkey,proxydn=None):
        """We just set our instance variables and wrap the methods - the real
           work is done in __localinit__ and __initPart2 - these are separated
           out this way so that we can call them from places other than
           instance creation e.g. when we just need to reconnect, not create a
           new instance"""
#        ldap.set_option(ldap.OPT_DEBUG_LEVEL,255)
        if cacert is not None:
            ldap.set_option(ldap.OPT_X_TLS_CACERTFILE,cacert)
            ldap.set_option(ldap.OPT_X_TLS_CERTFILE,bindcert)
            ldap.set_option(ldap.OPT_X_TLS_KEYFILE,bindkey)

        self.__wrapmethods()
        self.port = port or 389
        self.host = host
        self.cacert = cacert
        self.bindcert = bindcert
        self.bindkey = bindkey
        self.proxydn = proxydn
        # see if is local or not
        host1 = IPAdmin.getfqdn(host)
        host2 = IPAdmin.getfqdn()
        self.isLocal = (host1 == host2)
        self.suffixes = {}
        self.__localinit__()

    def __str__(self):
        return self.host + ":" + str(self.port)

    def __get_server_controls__(self):
        """Create the proxy user server control. The control has the form
        0x04 = Octet String
        4|0x80 sets the length of the string length field at 4 bytes
        the struct() gets us the length in bytes of string self.proxydn
        self.proxydn is the proxy dn to send"""

        import sys

        if self.proxydn is not None:
            proxydn = chr(0x04) + chr(4|0x80) + struct.pack('l', socket.htonl(len(self.proxydn))) + self.proxydn;

            # Create the proxy control
            sctrl=[]
            sctrl.append(LDAPControl('2.16.840.1.113730.3.4.18',True,proxydn))
        else:
            sctrl=None

        return sctrl

    def toLDAPURL(self):
        return "ldap://%s:%d/" % (self.host,self.port)

    def set_proxydn(self, proxydn):
        self.proxydn = proxydn

    def set_keytab(self, keytab):
        if keytab is not None:
            os.environ["KRB5CCNAME"] = keytab
            self.sasl_interactive_bind_s("", sasl_auth)
        self.proxydn = None

    def getEntry(self,*args):
        """This wraps the search function.  It is common to just get one entry"""

        sctrl = self.__get_server_controls__()

        if sctrl is not None:
            self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)

        try:
            res = self.search(*args)
            type, obj = self.result(res)

    #        res = self.search_ext(args[0], args[1], filterstr=args[2], attrlist=args[3], serverctrls=sctrl)
        except ldap.LDAPError, e:
            raise ipaerror.gen_exception(ipaerror.LDAP_DATABASE_ERROR, None, e)

        if not obj:
            raise ipaerror.gen_exception(ipaerror.LDAP_NOT_FOUND,
                    "no such entry for " + str(args))
        elif isinstance(obj,Entry):
            return obj
        else: # assume list/tuple
            return obj[0]

    def getList(self,*args):
        """This wraps the search function to find all users."""

        sctrl = self.__get_server_controls__()
        if sctrl is not None:
            self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)

        try:
            res = self.search(*args)
            type, obj = self.result(res)
        except (ldap.ADMINLIMIT_EXCEEDED, ldap.SIZELIMIT_EXCEEDED), e:
            raise ipaerror.gen_exception(ipaerror.LDAP_DATABASE_ERROR,
                    "Too many results returned by search", e)
        except ldap.LDAPError, e:
            raise ipaerror.gen_exception(ipaerror.LDAP_DATABASE_ERROR, None, e)

        if not obj:
            raise ipaerror.gen_exception(ipaerror.LDAP_NOT_FOUND,
                    "no such entry for " + str(args))

        all_users = []
        for s in obj:
            all_users.append(s)

        return all_users

    def getListAsync(self,*args):
        """This version performs an asynchronous search, to allow
           results even if we hit a limit.

           It returns a list: counter followed by the results.
           If the results are truncated, counter will be set to -1.
           """

        sctrl = self.__get_server_controls__()
        if sctrl is not None:
            self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)

        entries = []
        partial = 0

        try:
            msgid = self.search_ext(*args)
            type, result_list = self.result(msgid, 0)
            while result_list:
                for result in result_list:
                    entries.append(result)
                type, result_list = self.result(msgid, 0)
        except (ldap.ADMINLIMIT_EXCEEDED, ldap.SIZELIMIT_EXCEEDED), e:
            partial = 1
        except ldap.LDAPError, e:
            raise ipaerror.gen_exception(ipaerror.LDAP_DATABASE_ERROR, None, e)

        if not entries:
            raise ipaerror.gen_exception(ipaerror.LDAP_NOT_FOUND,
                    "no such entry for " + str(args))

        if partial == 1:
            counter = -1
        else:
            counter = len(entries)

        return [counter] + entries

    def addEntry(self,*args):
        """This wraps the add function. It assumes that the entry is already
           populated with all of the desired objectclasses and attributes"""

        sctrl = self.__get_server_controls__()

        try:
            if sctrl is not None:
                self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
            self.add_s(*args)
        except ldap.ALREADY_EXISTS:
            raise ipaerror.gen_exception(ipaerror.LDAP_DUPLICATE)
        except ldap.LDAPError, e:
            raise ipaerror.gen_exception(ipaerror.LDAP_DATABASE_ERROR, None, e)
        return "Success"

    def updateEntry(self,dn,olduser,newuser):
        """This wraps the mod function. It assumes that the entry is already
           populated with all of the desired objectclasses and attributes"""

        sctrl = self.__get_server_controls__()

        modlist = self.generateModList(olduser, newuser)

        if len(modlist) == 0:
            raise ipaerror.gen_exception(ipaerror.LDAP_EMPTY_MODLIST)

        try:
            if sctrl is not None:
                self.set_option(ldap.OPT_SERVER_CONTROLS, sctrl)
            self.modify_s(dn, modlist)
        # this is raised when a 'delete' attribute isn't found.
        # it indicates the previous attribute was removed by another
        # update, making the olduser stale.
        except ldap.NO_SUCH_ATTRIBUTE:
            raise ipaerror.gen_exception(ipaerror.LDAP_MIDAIR_COLLISION)
        except ldap.LDAPError, e:
            raise ipaerror.gen_exception(ipaerror.LDAP_DATABASE_ERROR, None, e)
        return "Success"

    def generateModList(self, old_entry, new_entry):
        """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(adds) > 0:
                modlist.append((ldap.MOD_ADD, key, adds))
            if len(removes) > 0:
                modlist.append((ldap.MOD_DELETE, key, removes))

        return modlist

    def inactivateEntry(self,dn,has_key):


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