source4/scripting/bin/get-descriptors

   1 #!/usr/bin/env python
   2 #
   3 # Unix SMB/CIFS implementation.
   4 # A script to compare differences of security descriotors between
   5 # a remote host and the local Ldb
   6 # Needs the local domain, the remote domain, IP of the remote host
   7 # Username and password for the remote domain, must be at least
   8 # Domain Administrator
   9 #
  10 # Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
  11 # Copyright (C) Nadezhda Ivanova <nadezhda.ivanova@postpath.com> 2009
  12 #
  13 # Based on the original in EJS:
  14 # Copyright (C) Andrew Tridgell <tridge@samba.org> 2005
  15 #
  16 # This program is free software; you can redistribute it and/or modify
  17 # it under the terms of the GNU General Public License as published by
  18 # the Free Software Foundation; either version 3 of the License, or
  19 # (at your option) any later version.
  20 #
  21 # This program is distributed in the hope that it will be useful,
  22 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 # GNU General Public License for more details.
  25 #
  26 # You should have received a copy of the GNU General Public License
  27 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  28 #
  29
  30 import optparse
  31 import sys
  32 import base64
  33
  34 sys.path.insert(0, "bin/python")
  35
  36 import samba
  37 from samba.auth import system_session
  38 import samba.getopt as options
  39 from samba.ndr import ndr_pack, ndr_unpack
  40 from samba.dcerpc import security
  41 from samba import Ldb
  42 from samba.samdb import SamDB
  43 from ldb import SCOPE_SUBTREE, SCOPE_BASE
  44
  45 parser = optparse.OptionParser("get-descriptor [options]")
  46 sambaopts = options.SambaOptions(parser)
  47 credopts = options.CredentialsOptions(parser)
  48 parser.add_option_group(credopts)
  49
  50 parser.add_option("--local-domain", type="string", metavar="LOCALDOMAIN",
  51                   help="set local domain")
  52 parser.add_option("--remote-domain", type="string", metavar="REMOTEDOMAIN",
  53                   help="set remote domain")
  54 parser.add_option("--host", type="string", metavar="HOST",
  55                   help="Ip of the remote host used for comparison")
  56 parser.add_option("--as-ldif", help="Output in LDIF format", action="store_true")
  57
  58 lp = sambaopts.get_loadparm()
  59 creds = credopts.get_credentials(lp)
  60
  61 opts = parser.parse_args()[0]
  62
  63 class DescrGetter:
  64
  65     def __init__(self, localdomain, remotedomain):
  66         self.samdb = SamDB(session_info=system_session(), lp=lp, options=["modules:paged_searches"])
  67         self.remote_ldb= Ldb("ldap://" + opts.host + ":389", credentials=creds, lp=lp,
  68                              options=["modules:paged_searches"])
  69         self.local_domain = localdomain.replace(".", ",DC=")
  70         self.local_domain = "DC=" + self.local_domain
  71         self.remote_domain = remotedomain.replace(".", ",DC=")
  72         self.remote_domain = "DC=" + self.remote_domain
  73         self.local_map = {}
  74         self.remote_map = {}
  75
  76     def get_domain_local_sid(self):
  77         res = self.samdb.search(base=self.local_domain,expression="(objectClass=*)", scope=SCOPE_BASE)
  78         self.local_sid = ndr_unpack( security.dom_sid,res[0]["objectSid"][0])
  79
  80     def get_domain_remote_sid(self):
  81         res = self.remote_ldb.search(base=self.remote_domain, expression="(objectClass=*)", scope=SCOPE_BASE)
  82         self.remote_sid = ndr_unpack( security.dom_sid,res[0]["objectSid"][0])
  83
  84     def add_to_ldif(self, dn, descr):
  85         ldif_entry = ["dn: " + dn,
  86                       "changetype: modify",
  87                       "replace: nTSecurityDescriptor",
  88                       "nTSecurityDescriptor::  " + base64.b64encode(ndr_pack(descr))]
  89
  90         for line in ldif_entry:
  91             length = 79
  92             if len(line) <= length + 1:
  93                 print line
  94             else:
  95                 for i in range(len(line) / length + 1):
  96                     if i == 0:
  97                         l = line[i * length:((i + 1) * length)]
  98                     else:
  99                         l = " " + line[(i * length):((i + 1) * length)]
 100                     print l
 101         print "\n"
 102
 103     def write_as_sddl(self, dn, descr):
 104         print dn
 105         print descr + "\n"
 106
 107     def read_descr_by_base(self, search_base):
 108         res = self.samdb.search(base=search_base + self.local_domain, expression="(objectClass=*)", scope=SCOPE_SUBTREE, attrs=["nTSecurityDescriptor"])
 109         for entry in res:
 110             dn = entry["dn"].__str__().replace(self.local_domain, "")
 111
 112             if "nTSecurityDescriptor" in entry:
 113                 desc_obj = ndr_unpack(security.descriptor, entry["nTSecurityDescriptor"][0])
 114                 self.local_map[dn] = desc_obj
 115
 116         res = self.remote_ldb.search(base=search_base + self.remote_domain, expression="(objectClass=*)", scope=SCOPE_SUBTREE, attrs=["nTSecurityDescriptor"])
 117         for entry in res:
 118             dn = entry["dn"].__str__().replace(self.remote_domain, "")
 119
 120             if "nTSecurityDescriptor" in entry:
 121                 desc_obj = ndr_unpack(security.descriptor, entry["nTSecurityDescriptor"][0])
 122                 self.remote_map[dn] = desc_obj
 123
 124     def read_desc(self):
 125         self.read_descr_by_base("CN=Schema,CN=Configuration,")
 126         self.read_descr_by_base("CN=Configuration,")
 127         self.read_descr_by_base("")
 128
 129     def write_desc_to_ldif(self):
 130         key_list_local = self.local_map.keys()
 131         key_list_remote = self.remote_map.keys()
 132         for key in key_list_remote:
 133             if key in key_list_local:
 134                 sddl = self.remote_map[key].as_sddl(self.remote_sid)
 135                 sddl_local = self.local_map[key].as_sddl(self.local_sid)
 136                 if sddl != sddl_local:
 137                     descr = security.descriptor.from_sddl(sddl, self.local_sid)
 138                 if opts.as_ldif:
 139                     self.add_to_ldif(key + self.local_domain, descr)
 140                 else:
 141                     self.write_as_sddl(key, descr.as_sddl(self.local_sid))
 142
 143     def run(self):
 144         self.get_domain_local_sid()
 145         self.get_domain_remote_sid()
 146         self.read_desc()
 147         self.write_desc_to_ldif()
 148
 149 desc = DescrGetter(opts.local_domain, opts.remote_domain)
 150 desc.run()