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