source4/scripting/devel/repl_cleartext_pwd.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright Stefan Metzmacher 2011-2012
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18 # This is useful to sync passwords from an AD domain.
  19 #
  20 #  $
  21 #  $ source4/scripting/devel/repl_cleartext_pwd.py \
  22 #       -Uadministrator%A1b2C3d4 \
  23 #       172.31.9.219 DC=bla,DC=base /tmp/cookie cleartext_utf8 131085 displayName
  24 #  # starting at usn[0]
  25 #  dn: CN=Test User1,CN=Users,DC=bla,DC=base
  26 #  cleartext_utf8: A1b2C3d4
  27 #  displayName:: VABlAHMAdAAgAFUAcwBlAHIAMQA=
  28 #
  29 #  # up to usn[16449]
  30 #  $
  31 #  $ source4/scripting/devel/repl_cleartext_pwd.py \
  32 #       -Uadministrator%A1b2C3d4
  33 #       172.31.9.219 DC=bla,DC=base cookie_file cleartext_utf8 131085 displayName
  34 #  # starting at usn[16449]
  35 #  # up to usn[16449]
  36 #  $
  37 #
  38
  39 from __future__ import print_function
  40 import sys
  41
  42 # Find right direction when running from source tree
  43 sys.path.insert(0, "bin/python")
  44
  45 import samba.getopt as options
  46 from optparse import OptionParser
  47
  48 from samba.dcerpc import drsuapi, drsblobs, misc
  49 from samba.ndr import ndr_pack, ndr_unpack, ndr_print
  50
  51 import binascii
  52 import hashlib
  53 import Crypto.Cipher.ARC4
  54 import struct
  55 import os
  56
  57 from ldif import LDIFWriter
  58
  59
  60 class globals:
  61     def __init__(self):
  62         self.global_objs = {}
  63         self.ldif = LDIFWriter(sys.stdout)
  64
  65     def add_attr(self, dn, attname, vals):
  66         if dn not in self.global_objs:
  67             self.global_objs[dn] = {}
  68         self.global_objs[dn][attname] = vals
  69
  70     def print_all(self):
  71         for dn, obj in self.global_objs.items():
  72             self.ldif.unparse(dn, obj)
  73             continue
  74         self.global_objs = {}
  75
  76
  77 def attid_equal(a1, a2):
  78     return (a1 & 0xffffffff) == (a2 & 0xffffffff)
  79
  80
  81 ########### main code ###########
  82 if __name__ == "__main__":
  83     parser = OptionParser("repl_cleartext_pwd.py [options] server dn cookie_file clear_utf8_name [attid attname attmode] [clear_utf16_name")
  84     sambaopts = options.SambaOptions(parser)
  85     credopts = options.CredentialsOptions(parser)
  86     parser.add_option_group(credopts)
  87
  88     (opts, args) = parser.parse_args()
  89
  90     if len(args) == 4:
  91         pass
  92     elif len(args) == 7:
  93         pass
  94     elif len(args) >= 8:
  95         pass
  96     else:
  97         parser.error("more arguments required - given=%d" % (len(args)))
  98
  99     server = args[0]
 100     dn = args[1]
 101     cookie_file = args[2]
 102     if len(cookie_file) == 0:
 103         cookie_file = None
 104     clear_utf8_name = args[3]
 105     if len(args) >= 7:
 106         try:
 107             attid = int(args[4], 16)
 108         except Exception:
 109             attid = int(args[4])
 110         attname = args[5]
 111         attmode = args[6]
 112         if attmode not in ["raw", "utf8"]:
 113             parser.error("attmode should be 'raw' or 'utf8'")
 114     else:
 115         attid = -1
 116         attname = None
 117         attmode = "raw"
 118     if len(args) >= 8:
 119         clear_utf16_name = args[7]
 120     else:
 121         clear_utf16_name = None
 122
 123     lp = sambaopts.get_loadparm()
 124     creds = credopts.get_credentials(lp)
 125
 126     if not creds.authentication_requested():
 127         parser.error("You must supply credentials")
 128
 129     gls = globals()
 130     try:
 131         f = open(cookie_file, 'r')
 132         store_blob = f.read()
 133         f.close()
 134
 135         store_hdr = store_blob[0:28]
 136         (store_version,
 137          store_dn_len, store_dn_ofs,
 138          store_hwm_len, store_hwm_ofs,
 139          store_utdv_len, store_utdv_ofs) = \
 140             struct.unpack("<LLLLLLL", store_hdr)
 141
 142         store_dn = store_blob[store_dn_ofs:store_dn_ofs + store_dn_len]
 143         store_hwm_blob = store_blob[store_hwm_ofs:store_hwm_ofs + store_hwm_len]
 144         store_utdv_blob = store_blob[store_utdv_ofs:store_utdv_ofs + store_utdv_len]
 145
 146         store_hwm = ndr_unpack(drsuapi.DsReplicaHighWaterMark, store_hwm_blob)
 147         store_utdv = ndr_unpack(drsblobs.replUpToDateVectorBlob, store_utdv_blob)
 148
 149         assert store_dn == dn
 150         # print "%s" % ndr_print(store_hwm)
 151         # print "%s" % ndr_print(store_utdv)
 152     except Exception:
 153         store_dn = dn
 154         store_hwm = drsuapi.DsReplicaHighWaterMark()
 155         store_hwm.tmp_highest_usn  = 0
 156         store_hwm.reserved_usn     = 0
 157         store_hwm.highest_usn      = 0
 158         store_utdv = None
 159
 160     binding_str = "ncacn_ip_tcp:%s[spnego,seal]" % server
 161
 162     drs_conn = drsuapi.drsuapi(binding_str, lp, creds)
 163
 164     bind_info = drsuapi.DsBindInfoCtr()
 165     bind_info.length = 28
 166     bind_info.info = drsuapi.DsBindInfo28()
 167     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_BASE
 168     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ASYNC_REPLICATION
 169     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_REMOVEAPI
 170     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_MOVEREQ_V2
 171     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHG_COMPRESS
 172     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V1
 173     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_RESTORE_USN_OPTIMIZATION
 174     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_KCC_EXECUTE
 175     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ADDENTRY_V2
 176     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_LINKED_VALUE_REPLICATION
 177     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V2
 178     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_INSTANCE_TYPE_NOT_REQ_ON_MOD
 179     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_CRYPTO_BIND
 180     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GET_REPL_INFO
 181     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_STRONG_ENCRYPTION
 182     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V01
 183     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_TRANSITIVE_MEMBERSHIP
 184     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ADD_SID_HISTORY
 185     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_POST_BETA3
 186     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GET_MEMBERSHIPS2
 187     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V6
 188     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_NONDOMAIN_NCS
 189     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V8
 190     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V5
 191     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V6
 192     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ADDENTRYREPLY_V3
 193     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V7
 194     bind_info.info.supported_extensions |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_VERIFY_OBJECT
 195     (info, drs_handle) = drs_conn.DsBind(misc.GUID(drsuapi.DRSUAPI_DS_BIND_GUID), bind_info)
 196
 197     null_guid = misc.GUID()
 198
 199     naming_context = drsuapi.DsReplicaObjectIdentifier()
 200     naming_context.dn              = dn
 201     highwatermark                  = store_hwm
 202     uptodateness_vector            = None
 203     if store_utdv is not None:
 204         uptodateness_vector = drsuapi.DsReplicaCursorCtrEx()
 205         if store_utdv.version == 1:
 206             uptodateness_vector.cursors = store_utdv.cursors
 207         elif store_utdv.version == 2:
 208             cursors = []
 209             for i in range(0, store_utdv.ctr.count):
 210                 cursor = drsuapi.DsReplicaCursor()
 211                 cursor.source_dsa_invocation_id = store_utdv.ctr.cursors[i].source_dsa_invocation_id
 212                 cursor.highest_usn = store_utdv.ctr.cursors[i].highest_usn
 213                 cursors.append(cursor)
 214             uptodateness_vector.cursors = cursors
 215
 216     req8 = drsuapi.DsGetNCChangesRequest8()
 217
 218     req8.destination_dsa_guid           = null_guid
 219     req8.source_dsa_invocation_id       = null_guid
 220     req8.naming_context                 = naming_context
 221     req8.highwatermark                  = highwatermark
 222     req8.uptodateness_vector            = uptodateness_vector
 223     req8.replica_flags                  = (drsuapi.DRSUAPI_DRS_INIT_SYNC |
 224                                            drsuapi.DRSUAPI_DRS_PER_SYNC |
 225                                            drsuapi.DRSUAPI_DRS_GET_ANC |
 226                                            drsuapi.DRSUAPI_DRS_NEVER_SYNCED |
 227                                            drsuapi.DRSUAPI_DRS_WRIT_REP)
 228     req8.max_object_count = 402
 229     req8.max_ndr_size = 402116
 230     req8.extended_op = 0
 231     req8.fsmo_info = 0
 232     req8.partial_attribute_set = None
 233     req8.partial_attribute_set_ex = None
 234     req8.mapping_ctr.num_mappings = 0
 235     req8.mapping_ctr.mappings = None
 236
 237     user_session_key = drs_conn.user_session_key
 238
 239     print("# starting at usn[%d]" % (highwatermark.highest_usn))
 240
 241     while True:
 242         (level, ctr) = drs_conn.DsGetNCChanges(drs_handle, 8, req8)
 243         if ctr.first_object is None and ctr.object_count != 0:
 244             raise RuntimeError("DsGetNCChanges: NULL first_object with object_count=%u" % (ctr.object_count))
 245
 246         obj_item = ctr.first_object
 247         while obj_item is not None:
 248             obj = obj_item.object
 249
 250             if obj.identifier is None:
 251                 obj_item = obj_item.next_object
 252                 continue
 253
 254             # print '%s' % obj.identifier.dn
 255
 256             is_deleted = False
 257             for i in range(0, obj.attribute_ctr.num_attributes):
 258                 attr = obj.attribute_ctr.attributes[i]
 259                 if attid_equal(attr.attid, drsuapi.DRSUAPI_ATTID_isDeleted):
 260                     is_deleted = True
 261             if is_deleted:
 262                 obj_item = obj_item.next_object
 263                 continue
 264
 265             spl_crypt = None
 266             attvals = None
 267             for i in range(0, obj.attribute_ctr.num_attributes):
 268                 attr = obj.attribute_ctr.attributes[i]
 269                 if attid_equal(attr.attid, attid):
 270                     attvals = []
 271                     for j in range(0, attr.value_ctr.num_values):
 272                         assert attr.value_ctr.values[j].blob is not None
 273                         val_raw = attr.value_ctr.values[j].blob
 274                         val = None
 275                         if attmode == "utf8":
 276                             val_unicode = unicode(val_raw, 'utf-16-le')
 277                             val = val_unicode.encode('utf-8')
 278                         elif attmode == "raw":
 279                             val = val_raw
 280                         else:
 281                             assert False, "attmode[%s]" % attmode
 282                         attvals.append(val)
 283                 if not attid_equal(attr.attid, drsuapi.DRSUAPI_ATTID_supplementalCredentials):
 284                     continue
 285                 assert attr.value_ctr.num_values <= 1
 286                 if attr.value_ctr.num_values == 0:
 287                     break
 288                 assert attr.value_ctr.values[0].blob is not None
 289                 spl_crypt = attr.value_ctr.values[0].blob
 290
 291             if spl_crypt is None:
 292                 obj_item = obj_item.next_object
 293                 continue
 294
 295             assert len(spl_crypt) >= 20
 296             confounder = spl_crypt[0:16]
 297             enc_buffer = spl_crypt[16:]
 298
 299             m5 = hashlib.md5()
 300             m5.update(user_session_key)
 301             m5.update(confounder)
 302             enc_key = m5.digest()
 303
 304             rc4 = Crypto.Cipher.ARC4.new(enc_key)
 305             plain_buffer = rc4.decrypt(enc_buffer)
 306
 307             (crc32_v) = struct.unpack("<L", plain_buffer[0:4])
 308             attr_val = plain_buffer[4:]
 309             crc32_c = binascii.crc32(attr_val) & 0xffffffff
 310             assert int(crc32_v[0]) == int(crc32_c), "CRC32 0x%08X != 0x%08X" % (crc32_v[0], crc32_c)
 311
 312             spl = ndr_unpack(drsblobs.supplementalCredentialsBlob, attr_val)
 313
 314             # print '%s' % ndr_print(spl)
 315
 316             cleartext_hex = None
 317
 318             for i in range(0, spl.sub.num_packages):
 319                 pkg = spl.sub.packages[i]
 320                 if pkg.name != "Primary:CLEARTEXT":
 321                     continue
 322                 cleartext_hex = pkg.data
 323
 324             if cleartext_hex is not None:
 325                 cleartext_utf16 = binascii.a2b_hex(cleartext_hex)
 326                 if clear_utf16_name is not None:
 327                     gls.add_attr(obj.identifier.dn, clear_utf16_name, [cleartext_utf16])
 328                 try:
 329                     cleartext_unicode = unicode(cleartext_utf16, 'utf-16-le')
 330                     cleartext_utf8 = cleartext_unicode.encode('utf-8')
 331                     gls.add_attr(obj.identifier.dn, clear_utf8_name, [cleartext_utf8])
 332                 except Exception:
 333                     pass
 334
 335                 if attvals is not None:
 336                     gls.add_attr(obj.identifier.dn, attname, attvals)
 337
 338             krb5_old_hex = None
 339
 340             for i in range(0, spl.sub.num_packages):
 341                 pkg = spl.sub.packages[i]
 342                 if pkg.name != "Primary:Kerberos":
 343                     continue
 344                 krb5_old_hex = pkg.data
 345
 346             if krb5_old_hex is not None:
 347                 krb5_old_raw = binascii.a2b_hex(krb5_old_hex)
 348                 krb5_old = ndr_unpack(drsblobs.package_PrimaryKerberosBlob, krb5_old_raw, allow_remaining=True)
 349
 350                 # print '%s' % ndr_print(krb5_old)
 351
 352             krb5_new_hex = None
 353
 354             for i in range(0, spl.sub.num_packages):
 355                 pkg = spl.sub.packages[i]
 356                 if pkg.name != "Primary:Kerberos-Newer-Keys":
 357                     continue
 358                 krb5_new_hex = pkg.data
 359
 360             if krb5_new_hex is not None:
 361                 krb5_new_raw = binascii.a2b_hex(krb5_new_hex)
 362                 krb5_new = ndr_unpack(drsblobs.package_PrimaryKerberosBlob, krb5_new_raw, allow_remaining=True)
 363
 364                 # print '%s' % ndr_print(krb5_new)
 365
 366             obj_item = obj_item.next_object
 367
 368         gls.print_all()
 369
 370         if ctr.more_data == 0:
 371             store_hwm = ctr.new_highwatermark
 372
 373             store_utdv = drsblobs.replUpToDateVectorBlob()
 374             store_utdv.version = ctr.uptodateness_vector.version
 375             store_utdv_ctr = store_utdv.ctr
 376             store_utdv_ctr.count = ctr.uptodateness_vector.count
 377             store_utdv_ctr.cursors = ctr.uptodateness_vector.cursors
 378             store_utdv.ctr = store_utdv_ctr
 379
 380             # print "%s" % ndr_print(store_hwm)
 381             # print "%s" % ndr_print(store_utdv)
 382
 383             store_hwm_blob = ndr_pack(store_hwm)
 384             store_utdv_blob = ndr_pack(store_utdv)
 385
 386             #
 387             # uint32_t version '1'
 388             # uint32_t dn_str_len
 389             # uint32_t dn_str_ofs
 390             # uint32_t hwm_blob_len
 391             # uint32_t hwm_blob_ofs
 392             # uint32_t utdv_blob_len
 393             # uint32_t utdv_blob_ofs
 394             store_hdr_len = 7 * 4
 395             dn_ofs = store_hdr_len
 396             hwm_ofs = dn_ofs + len(dn)
 397             utdv_ofs = hwm_ofs + len(store_hwm_blob)
 398             store_blob = struct.pack("<LLLLLLL", 1,
 399                                      len(dn), dn_ofs,
 400                                      len(store_hwm_blob), hwm_ofs,
 401                                      len(store_utdv_blob), utdv_ofs) + \
 402                 dn + store_hwm_blob + store_utdv_blob
 403
 404             tmp_file = "%s.tmp" % cookie_file
 405             f = open(tmp_file, 'wb')
 406             f.write(store_blob)
 407             f.close()
 408             os.rename(tmp_file, cookie_file)
 409
 410             print("# up to usn[%d]" % (ctr.new_highwatermark.highest_usn))
 411             break
 412         print("# up to tmp_usn[%d]" % (ctr.new_highwatermark.highest_usn))
 413         req8.highwatermark = ctr.new_highwatermark