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