summaryrefslogtreecommitdiff
path: root/source4/scripting/devel/ldapcmp
blob: 74a22bf33baa6f5cd08050021144b1b1e552a826 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
#!/usr/bin/env python
#
# Unix SMB/CIFS implementation.
# A script to compare differences of objects and attributes between
# two LDAP servers both running at the same time. It generally compares
# one of the three pratitions DOMAIN, CONFIGURATION or SCHEMA. Users
# that have to be provided sheould be able to read objects in any of the
# above partitions.

# Copyright (C) Zahari Zahariev <zahari.zahariev@postpath.com> 2009, 2010
#
# 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 os
import re
import sys
from optparse import OptionParser

sys.path.insert(0, "bin/python")

import samba
import samba.getopt as options
from samba import Ldb
from samba.ndr import ndr_pack, ndr_unpack
from samba.dcerpc import security
from ldb import SCOPE_SUBTREE, SCOPE_ONELEVEL, SCOPE_BASE, ERR_NO_SUCH_OBJECT, LdbError

global summary
summary = {}

class LDAPBase(object):

    def __init__(self, host, cmd_opts, creds, lp):
        ldb_options = []
        samdb_url = host
        if not "://" in host:
            if os.path.isfile(host):
                samdb_url = "tdb://%s" % host
            else:
                samdb_url = "ldap://%s:389" % host
        # use 'paged_search' module when connecting remotely
        if samdb_url.lower().startswith("ldap://"):
            ldb_options = ["modules:paged_searches"]
        self.ldb = Ldb(url=samdb_url,
                       credentials=creds,
                       lp=lp,
                       options=ldb_options)
        self.two_domains = cmd_opts.two
        self.quiet = cmd_opts.quiet
        self.host = host
        self.base_dn = self.find_basedn()
        self.domain_netbios = self.find_netbios()
        self.server_names = self.find_servers()
        self.domain_name = re.sub("[Dd][Cc]=", "", self.base_dn).replace(",", ".")
        self.domain_sid_bin = self.get_object_sid(self.base_dn)
        #
        # Log some domain controller specific place-holers that are being used
        # when compare content of two DCs. Uncomment for DEBUG purposes.
        if self.two_domains and not self.quiet:
            print "\n* Place-holders for %s:" % self.host
            print 4*" " + "${DOMAIN_DN}      => %s" % self.base_dn
            print 4*" " + "${DOMAIN_NETBIOS} => %s" % self.domain_netbios
            print 4*" " + "${SERVERNAME}     => %s" % self.server_names
            print 4*" " + "${DOMAIN_NAME}    => %s" % self.domain_name

    def find_servers(self):
        """
        """
        res = self.ldb.search(base="OU=Domain Controllers,%s" % self.base_dn, \
                scope=SCOPE_SUBTREE, expression="(objectClass=computer)", attrs=["cn"])
        assert len(res) > 0
        srv = []
        for x in res:
            srv.append(x["cn"][0])
        return srv

    def find_netbios(self):
        res = self.ldb.search(base="CN=Partitions,CN=Configuration,%s" % self.base_dn, \
                scope=SCOPE_SUBTREE, attrs=["nETBIOSName"])
        assert len(res) > 0
        for x in res:
            if "nETBIOSName" in x.keys():
                return x["nETBIOSName"][0]

    def find_basedn(self):
        res = self.ldb.search(base="", expression="(objectClass=*)", scope=SCOPE_BASE,
                attrs=["defaultNamingContext"])
        assert len(res) == 1
        return res[0]["defaultNamingContext"][0]

    def object_exists(self, object_dn):
        res = None
        try:
            res = self.ldb.search(base=object_dn, scope=SCOPE_BASE, expression="(objectClass=*)")
        except LdbError, (ERR_NO_SUCH_OBJECT, _):
            return False
        return len(res) == 1

    def get_object_sid(self, object_dn):
        try:
            res = self.ldb.search(base=object_dn, expression="(objectClass=*)", scope=SCOPE_BASE, attrs=["objectSid"])
        except LdbError, (ERR_NO_SUCH_OBJECT, _):
            raise Exception("DN sintax is wrong or object does't exist: " + object_dn)
        assert len(res) == 1
        return res[0]["objectSid"][0]

    def delete_force(self, object_dn):
        try:
            self.ldb.delete(object_dn)
        except Ldb.LdbError, e:
            assert "No such object" in str(e)

    def get_attributes(self, object_dn):
        """ Returns dict with all default visible attributes
        """
        res = self.ldb.search(base=object_dn, scope=SCOPE_BASE, attrs=["*"])
        assert len(res) == 1
        res = dict(res[0])
        # 'Dn' element is not iterable and we have it as 'distinguishedName'
        del res["dn"]
        for key in res.keys():
            res[key] = list(res[key])
        return res

    def get_descriptor(self, object_dn):
        res = self.ldb.search(base=object_dn, scope=SCOPE_BASE, attrs=["nTSecurityDescriptor"])
        return res[0]["nTSecurityDescriptor"][0]


class LDAPObject(object):
    def __init__(self, connection, dn, summary, cmd_opts):
        self.con = connection
        self.two_domains = cmd_opts.two
        self.quiet = cmd_opts.quiet
        self.verbose = cmd_opts.verbose
        self.summary = summary
        self.dn = dn.replace("${DOMAIN_DN}", self.con.base_dn)
        self.dn = self.dn.replace("CN=${DOMAIN_NETBIOS}", "CN=%s" % self.con.domain_netbios)
        for x in self.con.server_names:
            self.dn = self.dn.replace("CN=${SERVERNAME}", "CN=%s" % x)
        self.attributes = self.con.get_attributes(self.dn)
        # Attributes that are considered always to be different e.g based on timestamp etc.
        #
        # One domain - two domain controllers
        self.ignore_attributes =  [
                # Default Naming Context
                "lastLogon", "lastLogoff", "badPwdCount", "logonCount", "badPasswordTime", "modifiedCount",
                "operatingSystemVersion","oEMInformation",
                # Configuration Naming Context
                "repsFrom", "dSCorePropagationData", "msExchServer1HighestUSN",
                "replUpToDateVector", "repsTo", "whenChanged", "uSNChanged", "uSNCreated",
                # Schema Naming Context
                "prefixMap",]
        self.dn_attributes = []
        self.domain_attributes = []
        self.servername_attributes = []
        self.netbios_attributes = []
        self.other_attributes = []
        # Two domains - two domain controllers

        if self.two_domains:
            self.ignore_attributes +=  [
                "objectCategory", "objectGUID", "objectSid", "whenCreated", "pwdLastSet", "uSNCreated", "creationTime",
                "modifiedCount", "priorSetTime", "rIDManagerReference", "gPLink", "ipsecNFAReference",
                "fRSPrimaryMember", "fSMORoleOwner", "masteredBy", "ipsecOwnersReference", "wellKnownObjects",
                "badPwdCount", "ipsecISAKMPReference", "ipsecFilterReference", "msDs-masteredBy", "lastSetTime",
                "ipsecNegotiationPolicyReference", "subRefs", "gPCFileSysPath", "accountExpires", "invocationId",
                # After Exchange preps
                "targetAddress", "msExchMailboxGuid", "siteFolderGUID"]
            #
            # Attributes that contain the unique DN tail part e.g. 'DC=samba,DC=org'
            self.dn_attributes = [
                "distinguishedName", "defaultObjectCategory", "member", "memberOf", "siteList", "nCName",
                "homeMDB", "homeMTA", "interSiteTopologyGenerator", "serverReference",
                "msDS-HasInstantiatedNCs", "hasMasterNCs", "msDS-hasMasterNCs", "msDS-HasDomainNCs", "dMDLocation",
                "msDS-IsDomainFor", "rIDSetReferences", "serverReferenceBL",
                # After Exchange preps
                "msExchHomeRoutingGroup", "msExchResponsibleMTAServer", "siteFolderServer", "msExchRoutingMasterDN",
                "msExchRoutingGroupMembersBL", "homeMDBBL", "msExchHomePublicMDB", "msExchOwningServer", "templateRoots",
                "addressBookRoots", "msExchPolicyRoots", "globalAddressList", "msExchOwningPFTree",
                "msExchResponsibleMTAServerBL", "msExchOwningPFTreeBL",]
            self.dn_attributes = [x.upper() for x in self.dn_attributes]
            #
            # Attributes that contain the Domain name e.g. 'samba.org'
            self.domain_attributes = [
                "proxyAddresses", "mail", "userPrincipalName", "msExchSmtpFullyQualifiedDomainName",
                "dnsHostName", "networkAddress", "dnsRoot", "servicePrincipalName",]
            self.domain_attributes = [x.upper() for x in self.domain_attributes]
            #
            # May contain DOMAIN_NETBIOS and SERVERNAME
            self.servername_attributes = [ "distinguishedName", "name", "CN", "sAMAccountName", "dNSHostName",
                "servicePrincipalName", "rIDSetReferences", "serverReference", "serverReferenceBL",
                "msDS-IsDomainFor", "interSiteTopologyGenerator",]
            self.servername_attributes = [x.upper() for x in self.servername_attributes]
            #
            self.netbios_attributes = [ "servicePrincipalName", "CN", "distinguishedName", "nETBIOSName", "name",]
            self.netbios_attributes = [x.upper() for x in self.netbios_attributes]
            #
            self.other_attributes = [ "name", "DC",]
            self.other_attributes = [x.upper() for x in self.other_attributes]
        #
        self.ignore_attributes = [x.upper() for x in self.ignore_attributes]

    def log(self, msg):
        """
        Log on the screen if there is no --quiet oprion set
        """
        if not self.quiet:
            print msg

    def fix_dn(self, s):
        res = "%s" % s
        if not self.two_domains:
            return res
        if res.upper().endswith(self.con.base_dn.upper()):
            res = res[:len(res)-len(self.con.base_dn)] + "${DOMAIN_DN}"
        return res

    def fix_domain_name(self, s):
        res = "%s" % s
        if not self.two_domains:
            return res
        res = res.replace(self.con.domain_name.lower(), self.con.domain_name.upper())
        res = res.replace(self.con.domain_name.upper(), "${DOMAIN_NAME}")
        return res

    def fix_domain_netbios(self, s):
        res = "%s" % s
        if not self.two_domains:
            return res
        res = res.replace(self.con.domain_netbios.lower(), self.con.domain_netbios.upper())
        res = res.replace(self.con.domain_netbios.upper(), "${DOMAIN_NETBIOS}")
        return res

    def fix_server_name(self, s):
        res = "%s" % s
        if not self.two_domains or len(self.con.server_names) > 1:
            return res
        for x in self.con.server_names:
            res = res.upper().replace(x, "${SERVERNAME}")
        return res

    def __eq__(self, other):
        res = ""
        self.unique_attrs = []
        self.df_value_attrs = []
        other.unique_attrs = []
        if self.attributes.keys() != other.attributes.keys():
            #
            title = 4*" " + "Attributes found only in %s:" % self.con.host
            for x in self.attributes.keys():
                if not x in other.attributes.keys() and \
                not x.upper() in [q.upper() for q in other.ignore_attributes]:
                    if title:
                        res += title + "\n"
                        title = None
                    res += 8*" " + x + "\n"
                    self.unique_attrs.append(x)
            #
            title = 4*" " + "Attributes found only in %s:" % other.con.host
            for x in other.attributes.keys():
                if not x in self.attributes.keys() and \
                not x.upper() in [q.upper() for q in self.ignore_attributes]:
                    if title:
                        res += title + "\n"
                        title = None
                    res += 8*" " + x + "\n"
                    other.unique_attrs.append(x)
        #
        missing_attrs = [x.upper() for x in self.unique_attrs]
        missing_attrs += [x.upper() for x in other.unique_attrs]
        title = 4*" " + "Difference in attribute values:"
        for x in self.attributes.keys():
            if x.upper() in self.ignore_attributes or x.upper() in missing_attrs:
                continue
            if isinstance(self.attributes[x], list) and isinstance(other.attributes[x], list):
                self.attributes[x] = sorted(self.attributes[x])
                other.attributes[x] = sorted(other.attributes[x])
            if self.attributes[x] != other.attributes[x]:
                p = None
                q = None
                m = None
                n = None
                # First check if the difference can be fixed but shunting the first part
                # of the DomainHostName e.g. 'mysamba4.test.local' => 'mysamba4'
                if x.upper() in self.other_attributes:
                    p = [self.con.domain_name.split(".")[0] == j for j in self.attributes[x]]
                    q = [other.con.domain_name.split(".")[0] == j for j in other.attributes[x]]
                    if p == q:
                        continue
                # Attribute values that are list that contain DN based values that may differ
                elif x.upper() in self.dn_attributes:
                    m = p
                    n = q
                    if not p and not q:
                        m = self.attributes[x]
                        n = other.attributes[x]
                    p = [self.fix_dn(j) for j in m]
                    q = [other.fix_dn(j) for j in n]
                    if p == q:
                        continue
                # Attributes that contain the Domain name in them
                if x.upper() in self.domain_attributes:
                    m = p
                    n = q
                    if not p and not q:
                        m = self.attributes[x]
                        n = other.attributes[x]
                    p = [self.fix_domain_name(j) for j in m]
                    q = [other.fix_domain_name(j) for j in n]
                    if p == q:
                        continue
                #
                if x.upper() in self.servername_attributes:
                    # Attributes with SERVERNAME
                    m = p
                    n = q
                    if not p and not q:
                        m = self.attributes[x]
                        n = other.attributes[x]
                    p = [self.fix_server_name(j) for j in m]
                    q = [other.fix_server_name(j) for j in n]
                    if p == q:
                        continue
                #
                if x.upper() in self.netbios_attributes:
                    # Attributes with NETBIOS Domain name
                    m = p
                    n = q
                    if not p and not q:
                        m = self.attributes[x]
                        n = other.attributes[x]
                    p = [self.fix_domain_netbios(j) for j in m]
                    q = [other.fix_domain_netbios(j) for j in n]
                    if p == q:
                        continue
                #
                if title:
                    res += title + "\n"
                    title = None
                if p and q:
                    res += 8*" " + x + " => \n%s\n%s" % (p, q) + "\n"
                else:
                    res += 8*" " + x + " => \n%s\n%s" % (self.attributes[x], other.attributes[x]) + "\n"
                self.df_value_attrs.append(x)
        #
        if self.unique_attrs + other.unique_attrs != []:
            assert self.unique_attrs != other.unique_attrs
        self.summary["unique_attrs"] += self.unique_attrs
        self.summary["df_value_attrs"] += self.df_value_attrs
        other.summary["unique_attrs"] += other.unique_attrs
        other.summary["df_value_attrs"] += self.df_value_attrs # they are the same
        #
        self.screen_output = res[:-1]
        other.screen_output = res[:-1]
        #
        return res == ""


class LDAPBundel(object):
    def __init__(self, connection, context, cmd_opts, dn_list=None):
        self.con = connection
        self.cmd_opts = cmd_opts
        self.two_domains = cmd_opts.two
        self.quiet = cmd_opts.quiet
        self.verbose = cmd_opts.verbose
        self.summary = {}
        self.summary["unique_attrs"] = []
        self.summary["df_value_attrs"] = []
        self.summary["known_ignored_dn"] = []
        self.summary["abnormal_ignored_dn"] = []
        if dn_list:
            self.dn_list = dn_list
        elif context.upper() in ["DOMAIN", "CONFIGURATION", "SCHEMA"]:
            self.context = context.upper()
            self.dn_list = self.get_dn_list(context)
        else:
            raise Exception("Unknown initialization data for LDAPBundel().")
        counter = 0
        while counter < len(self.dn_list) and self.two_domains:
            # Use alias reference
            tmp = self.dn_list[counter]
            tmp = tmp[:len(tmp)-len(self.con.base_dn)] + "${DOMAIN_DN}"
            tmp = tmp.replace("CN=%s" % self.con.domain_netbios, "CN=${DOMAIN_NETBIOS}")
            if len(self.con.server_names) == 1:
                for x in self.con.server_names:
                    tmp = tmp.replace("CN=%s" % x, "CN=${SERVERNAME}")
            self.dn_list[counter] = tmp
            counter += 1
        self.dn_list = list(set(self.dn_list))
        self.dn_list = sorted(self.dn_list)
        self.size = len(self.dn_list)

    def log(self, msg):
        """
        Log on the screen if there is no --quiet oprion set
        """
        if not self.quiet:
            print msg

    def update_size(self):
        self.size = len(self.dn_list)
        self.dn_list = sorted(self.dn_list)

    def __eq__(self, other):
        res = True
        if self.size != other.size:
            self.log( "\n* DN lists have different size: %s != %s" % (self.size, other.size) )
            res = False
        #
        title= "\n* DNs found only in %s:" % self.con.host
        for x in self.dn_list:
            if not x.upper() in [q.upper() for q in other.dn_list]:
                if title:
                    self.log( title )
                    title = None
                    res = False
                self.log( 4*" " + x )
                self.dn_list[self.dn_list.index(x)] = ""
        self.dn_list = [x for x in self.dn_list if x]
        #
        title= "\n* DNs found only in %s:" % other.con.host
        for x in other.dn_list:
            if not x.upper() in [q.upper() for q in self.dn_list]:
                if title:
                    self.log( title )
                    title = None
                    res = False
                self.log( 4*" " + x )
                other.dn_list[other.dn_list.index(x)] = ""
        other.dn_list = [x for x in other.dn_list if x]
        #
        self.update_size()
        other.update_size()
        assert self.size == other.size
        assert sorted([x.upper() for x in self.dn_list]) == sorted([x.upper() for x in other.dn_list])
        self.log( "\n* Objects to be compared: %s" % self.size )

        index = 0
        while index < self.size:
            skip = False
            try:
                object1 = LDAPObject(connection=self.con,
                        dn=self.dn_list[index],
                        summary=self.summary,
                        cmd_opts = self.cmd_opts)
            except LdbError, (ERR_NO_SUCH_OBJECT, _):
                self.log( "\n!!! Object not found: %s" % self.dn_list[index] )
                skip = True
            try:
                object2 = LDAPObject(connection=other.con,
                        dn=other.dn_list[index],
                        summary=other.summary,
                        cmd_opts = self.cmd_opts)
            except LdbError, (ERR_NO_SUCH_OBJECT, _):
                self.log( "\n!!! Object not found: %s" % other.dn_list[index] )
                skip = True
            if skip:
                index += 1
                continue
            if object1 == object2:
                if self.verbose:
                    self.log( "\nComparing:" )
                    self.log( "'%s' [%s]" % (object1.dn, object1.con.host) )
                    self.log( "'%s' [%s]" % (object2.dn, object2.con.host) )
                    self.log( 4*" " + "OK" )
            else:
                self.log( "\nComparing:" )
                self.log( "'%s' [%s]" % (object1.dn, object1.con.host) )
                self.log( "'%s' [%s]" % (object2.dn, object2.con.host) )
                self.log( object1.screen_output )
                self.log( 4*" " + "FAILED" )
                res = False
            self.summary = object1.summary
            other.summary = object2.summary
            index += 1
        #
        return res

    def get_dn_list(self, context):
        """ Query LDAP server about the DNs of certain naming self.con.ext Domain (or Default), Configuration, Schema.
            Parse all DNs and filter those that are 'strange' or abnormal.
        """
        if context.upper() == "DOMAIN":
            search_base = "%s" % self.con.base_dn
        elif context.upper() == "CONFIGURATION":
            search_base = "CN=Configuration,%s" % self.con.base_dn
        elif context.upper() == "SCHEMA":
            search_base = "CN=Schema,CN=Configuration,%s" % self.con.base_dn

        dn_list = []
        res = self.con.ldb.search(base=search_base, scope=SCOPE_SUBTREE, attrs=["dn"])
        for x in res:
           dn_list.append(x["dn"].get_linearized())

        #
        global summary
        #
        return dn_list

    def print_summary(self):
        self.summary["unique_attrs"] = list(set(self.summary["unique_attrs"]))
        self.summary["df_value_attrs"] = list(set(self.summary["df_value_attrs"]))
        #
        if self.summary["unique_attrs"]:
            self.log( "\nAttributes found only in %s:" % self.con.host )
            self.log( "".join([str("\n" + 4*" " + x) for x in self.summary["unique_attrs"]]) )
        #
        if self.summary["df_value_attrs"]:
            self.log( "\nAttributes with different values:" )
            self.log( "".join([str("\n" + 4*" " + x) for x in self.summary["df_value_attrs"]]) )
            self.summary["df_value_attrs"] = []

###

if __name__ == "__main__":
    parser = OptionParser("ldapcmp [options] domain|configuration|schema")
    sambaopts = options.SambaOptions(parser)
    parser.add_option_group(sambaopts)
    credopts = options.CredentialsOptionsDouble(parser)
    parser.add_option_group(credopts)

    parser.add_option("", "--host", dest="host",
                              help="IP of the first LDAP server",)
    parser.add_option("", "--host2", dest="host2",
                              help="IP of the second LDAP server",)
    parser.add_option("-w", "--two", dest="two", action="store_true", default=False,
                              help="Hosts are in two different domains",)
    parser.add_option("-q", "--quiet", dest="quiet", action="store_true", default=False,
                              help="Do not print anything but relay on just exit code",)
    parser.add_option("-v", "--verbose", dest="verbose", action="store_true", default=False,
                              help="Print all DN pairs that have been compared",)
    (opts, args) = parser.parse_args()

    lp = sambaopts.get_loadparm()
    creds = credopts.get_credentials(lp)
    creds2 = credopts.get_credentials2(lp)
    if creds2.is_anonymous():
        creds2 = creds

    if creds.is_anonymous():
        parser.error("You must supply at least one username/password pair")

    # make a list of contexts to compare in
    contexts = []
    if len(args) == 0:
        # if no argument given, we compare all contexts
        contexts = ["DOMAIN", "CONFIGURATION", "SCHEMA"]
    else:
        for context in args:
            if not context.upper() in ["DOMAIN", "CONFIGURATION", "SCHEMA"]:
                parser.error("Incorrect argument: %s" % context)
            contexts.append(context.upper())

    if opts.verbose and opts.quiet:
        parser.error("You cannot set --verbose and --quiet together")

    con1 = LDAPBase(opts.host, opts, creds, lp)
    assert len(con1.base_dn) > 0

    con2 = LDAPBase(opts.host2, opts, creds2, lp)
    assert len(con2.base_dn) > 0

    status = 0
    for context in contexts:
        if not opts.quiet:
            print "\n* Comparing [%s] context..." % context

        b1 = LDAPBundel(con1, context=context, cmd_opts=opts)
        b2 = LDAPBundel(con2, context=context, cmd_opts=opts)

        if b1 == b2:
            if not opts.quiet:
                print "\n* Result for [%s]: SUCCESS" % context
        else:
            if not opts.quiet:
                print "\n* Result for [%s]: FAILURE" % context
                print "\nSUMMARY"
                print "---------"
            # mark exit status as FAILURE if a least one comparison failed
            status = -1

        assert len(b1.summary["df_value_attrs"]) == len(b2.summary["df_value_attrs"])
        b2.summary["df_value_attrs"] = []

        if not opts.quiet:
            b1.print_summary()
            b2.print_summary()

    sys.exit(status)