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