source4/scripting/python/samba/netcmd/pwsettings.py

   1 #!/usr/bin/python
   2 #
   3 # Sets password settings.
   4 # (Password complexity, history length, minimum password length, the minimum
   5 # and maximum password age) on a Samba4 server
   6 #
   7 # Copyright Matthias Dieter Wallnoefer 2009
   8 # Copyright Andrew Kroeger 2009
   9 # Copyright Jelmer Vernooij 2009
  10 #
  11 # This program is free software; you can redistribute it and/or modify
  12 # it under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation; either version 3 of the License, or
  14 # (at your option) any later version.
  15 #
  16 # This program is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 # GNU General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU General Public License
  22 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 #
  24
  25 import samba.getopt as options
  26 import ldb
  27
  28 from samba.auth import system_session
  29 from samba.samdb import SamDB
  30 from samba.dcerpc.samr import DOMAIN_PASSWORD_COMPLEX
  31 from samba.netcmd import Command, CommandError, Option
  32
  33 class cmd_pwsettings(Command):
  34     """Sets password settings
  35
  36     Password complexity, history length, minimum password length, the minimum
  37     and maximum password age) on a Samba4 server.
  38     """
  39
  40     synopsis = "(show | set <options>)"
  41
  42     takes_optiongroups = {
  43         "sambaopts": options.SambaOptions,
  44         "versionopts": options.VersionOptions,
  45         "credopts": options.CredentialsOptions,
  46         }
  47
  48     takes_options = [
  49         Option("-H", help="LDB URL for database or target server", type=str),
  50         Option("--quiet", help="Be quiet", action="store_true"),
  51         Option("--complexity", type="choice", choices=["on","off","default"],
  52           help="The password complexity (on | off | default). Default is 'on'"),
  53         Option("--history-length",
  54           help="The password history length (<integer> | default).  Default is 24.", type=str),
  55         Option("--min-pwd-length",
  56           help="The minimum password length (<integer> | default).  Default is 7.", type=str),
  57         Option("--min-pwd-age",
  58           help="The minimum password age (<integer in days> | default).  Default is 0.", type=str),
  59         Option("--max-pwd-age",
  60           help="The maximum password age (<integer in days> | default).  Default is 43.", type=str),
  61           ]
  62
  63     takes_args = ["subcommand"]
  64
  65     def run(self, subcommand, H=None, min_pwd_age=None, max_pwd_age=None,
  66             quiet=False, complexity=None, history_length=None,
  67             min_pwd_length=None, credopts=None, sambaopts=None,
  68             versionopts=None):
  69         lp = sambaopts.get_loadparm()
  70         creds = credopts.get_credentials(lp)
  71
  72         samdb = SamDB(url=H, session_info=system_session(),
  73             credentials=creds, lp=lp)
  74
  75         domain_dn = samdb.domain_dn()
  76         res = samdb.search(domain_dn, scope=ldb.SCOPE_BASE,
  77           attrs=["pwdProperties", "pwdHistoryLength", "minPwdLength",
  78                  "minPwdAge", "maxPwdAge"])
  79         assert(len(res) == 1)
  80         try:
  81             pwd_props = int(res[0]["pwdProperties"][0])
  82             pwd_hist_len = int(res[0]["pwdHistoryLength"][0])
  83             cur_min_pwd_len = int(res[0]["minPwdLength"][0])
  84             # ticks -> days
  85             cur_min_pwd_age = int(abs(int(res[0]["minPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  86             cur_max_pwd_age = int(abs(int(res[0]["maxPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  87         except KeyError:
  88             raise CommandError("Could not retrieve password properties!")
  89
  90         if subcommand == "show":
  91             self.message("Password informations for domain '%s'" % domain_dn)
  92             self.message("")
  93             if pwd_props & DOMAIN_PASSWORD_COMPLEX != 0:
  94                 self.message("Password complexity: on")
  95             else:
  96                 self.message("Password complexity: off")
  97             self.message("Password history length: %d" % pwd_hist_len)
  98             self.message("Minimum password length: %d" % cur_min_pwd_len)
  99             self.message("Minimum password age (days): %d" % cur_min_pwd_age)
 100             self.message("Maximum password age (days): %d" % cur_max_pwd_age)
 101         elif subcommand == "set":
 102             msgs = []
 103             m = ldb.Message()
 104             m.dn = ldb.Dn(samdb, domain_dn)
 105
 106             if complexity is not None:
 107                 if complexity == "on" or complexity == "default":
 108                     pwd_props = pwd_props | DOMAIN_PASSWORD_COMPLEX
 109                     msgs.append("Password complexity activated!")
 110                 elif complexity == "off":
 111                     pwd_props = pwd_props & (~DOMAIN_PASSWORD_COMPLEX)
 112                     msgs.append("Password complexity deactivated!")
 113
 114                 m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
 115                   ldb.FLAG_MOD_REPLACE, "pwdProperties")
 116
 117             if history_length is not None:
 118                 if history_length == "default":
 119                     pwd_hist_len = 24
 120                 else:
 121                     pwd_hist_len = int(history_length)
 122
 123                 if pwd_hist_len < 0 or pwd_hist_len > 24:
 124                     raise CommandError("Password history length must be in the range of 0 to 24!")
 125
 126                 m["pwdHistoryLength"] = ldb.MessageElement(str(pwd_hist_len),
 127                   ldb.FLAG_MOD_REPLACE, "pwdHistoryLength")
 128                 msgs.append("Password history length changed!")
 129
 130             if min_pwd_length is not None:
 131                 if min_pwd_length == "default":
 132                     min_pwd_len = 7
 133                 else:
 134                     min_pwd_len = int(min_pwd_length)
 135
 136                 if min_pwd_len < 0 or min_pwd_len > 14:
 137                     raise CommandError("Minimum password length must be in the range of 0 to 14!")
 138
 139                 m["minPwdLength"] = ldb.MessageElement(str(min_pwd_len),
 140                   ldb.FLAG_MOD_REPLACE, "minPwdLength")
 141                 msgs.append("Minimum password length changed!")
 142
 143             if min_pwd_age is not None:
 144                 if min_pwd_age == "default":
 145                     min_pwd_age = 0
 146                 else:
 147                     min_pwd_age = int(min_pwd_age)
 148
 149                 if min_pwd_age < 0 or min_pwd_age > 998:
 150                     raise CommandError("Minimum password age must be in the range of 0 to 998!")
 151
 152                 # days -> ticks
 153                 min_pwd_age_ticks = -int(min_pwd_age * (24 * 60 * 60 * 1e7))
 154
 155                 m["minPwdAge"] = ldb.MessageElement(str(min_pwd_age_ticks),
 156                   ldb.FLAG_MOD_REPLACE, "minPwdAge")
 157                 msgs.append("Minimum password age changed!")
 158
 159             if max_pwd_age is not None:
 160                 if max_pwd_age == "default":
 161                     max_pwd_age = 43
 162                 else:
 163                     max_pwd_age = int(max_pwd_age)
 164
 165                 if max_pwd_age < 0 or max_pwd_age > 999:
 166                     raise CommandError("Maximum password age must be in the range of 0 to 999!")
 167
 168                 # days -> ticks
 169                 max_pwd_age_ticks = -int(max_pwd_age * (24 * 60 * 60 * 1e7))
 170
 171                 m["maxPwdAge"] = ldb.MessageElement(str(max_pwd_age_ticks),
 172                   ldb.FLAG_MOD_REPLACE, "maxPwdAge")
 173                 msgs.append("Maximum password age changed!")
 174
 175             if max_pwd_age > 0 and min_pwd_age >= max_pwd_age:
 176                 raise CommandError("Maximum password age (%d) must be greater than minimum password age (%d)!" % (max_pwd_age, min_pwd_age))
 177
 178             samdb.modify(m)
 179             msgs.append("All changes applied successfully!")
 180             self.message("\n".join(msgs))
 181         else:
 182             raise CommandError("Wrong argument '%s'!" % subcommand)