source4/setup/pwsettings

   1 #!/usr/bin/python
   2 #
   3 # Sets password settings (Password complexity, history length, minimum password
   4 # length, the minimum and maximum password age) on a Samba4 server
   5 #
   6 # Copyright Matthias Dieter Wallnoefer 2009
   7 # Copyright Andrew Kroeger 2009
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 import sys
  24
  25 # Find right directory when running from source tree
  26 sys.path.insert(0, "bin/python")
  27
  28 import samba.getopt as options
  29 import optparse
  30 import ldb
  31
  32 from samba.auth import system_session
  33 from samba.samdb import SamDB
  34 from samba.dcerpc.samr import DOMAIN_PASSWORD_COMPLEX
  35
  36 parser = optparse.OptionParser("pwsettings (show | set <options>)")
  37 sambaopts = options.SambaOptions(parser)
  38 parser.add_option_group(sambaopts)
  39 parser.add_option_group(options.VersionOptions(parser))
  40 credopts = options.CredentialsOptions(parser)
  41 parser.add_option_group(credopts)
  42 parser.add_option("--quiet", help="Be quiet", action="store_true")
  43 parser.add_option("--complexity",
  44   help="The password complexity (on | off | default). Default is 'on'", type=str)
  45 parser.add_option("--history-length",
  46   help="The password history length (<integer> | default).  Default is 24.", type=str)
  47 parser.add_option("--min-pwd-length",
  48   help="The minimum password length (<integer> | default).  Default is 7.", type=str)
  49 parser.add_option("--min-pwd-age",
  50   help="The minimum password age (<integer in days> | default).  Default is 0.", type=str)
  51 parser.add_option("--max-pwd-age",
  52   help="The maximum password age (<integer in days> | default).  Default is 43.", type=str)
  53
  54 opts, args = parser.parse_args()
  55
  56 #
  57 #  print a message if quiet is not set
  58 #
  59 def message(text):
  60         if not opts.quiet:
  61                 print text
  62
  63 if len(args) == 0:
  64         parser.print_usage()
  65         sys.exit(1)
  66
  67 lp = sambaopts.get_loadparm()
  68 creds = credopts.get_credentials(lp)
  69
  70 samdb = SamDB(url=lp.get("sam database"), session_info=system_session(),
  71               credentials=creds, lp=lp)
  72
  73 domain_dn = SamDB.domain_dn(samdb)
  74 res = samdb.search(domain_dn, scope=ldb.SCOPE_BASE,
  75   attrs=["pwdProperties", "pwdHistoryLength", "minPwdLength", "minPwdAge",
  76   "maxPwdAge"])
  77 assert(len(res) == 1)
  78 try:
  79         pwd_props = int(res[0]["pwdProperties"][0])
  80         pwd_hist_len = int(res[0]["pwdHistoryLength"][0])
  81         min_pwd_len = int(res[0]["minPwdLength"][0])
  82         # ticks -> days
  83         min_pwd_age = int(abs(int(res[0]["minPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  84         max_pwd_age = int(abs(int(res[0]["maxPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  85 except:
  86         print "ERROR: Could not retrieve password properties!"
  87         if args[0] == "show":
  88                 print "So no settings can be displayed!"
  89         sys.exit(1)
  90
  91 if args[0] == "show":
  92         message("Password informations for domain '" + domain_dn + "'")
  93         message("")
  94         if pwd_props & DOMAIN_PASSWORD_COMPLEX != 0:
  95                 message("Password complexity: on")
  96         else:
  97                 message("Password complexity: off")
  98         message("Password history length: " + str(pwd_hist_len))
  99         message("Minimum password length: " + str(min_pwd_len))
 100         message("Minimum password age (days): " + str(min_pwd_age))
 101         message("Maximum password age (days): " + str(max_pwd_age))
 102
 103 elif args[0] == "set":
 104
 105         msgs = []
 106         m = ldb.Message()
 107         m.dn = ldb.Dn(samdb, domain_dn)
 108
 109         if opts.complexity is not None:
 110                 if opts.complexity == "on" or opts.complexity == "default":
 111                         pwd_props = pwd_props | DOMAIN_PASSWORD_COMPLEX
 112                         msgs.append("Password complexity activated!")
 113                 elif opts.complexity == "off":
 114                         pwd_props = pwd_props & (~DOMAIN_PASSWORD_COMPLEX)
 115                         msgs.append("Password complexity deactivated!")
 116                 else:
 117                         print "ERROR: Wrong argument '" + opts.complexity + "'!"
 118                         sys.exit(1)
 119
 120                 m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
 121                   ldb.FLAG_MOD_REPLACE, "pwdProperties")
 122
 123         if opts.history_length is not None:
 124                 if opts.history_length == "default":
 125                         pwd_hist_len = 24
 126                 else:
 127                         pwd_hist_len = int(opts.history_length)
 128
 129                 if pwd_hist_len < 0 or pwd_hist_len > 24:
 130                         print "ERROR: Password history length must be in the range of 0 to 24!"
 131                         sys.exit(1)
 132
 133                 m["pwdHistoryLength"] = ldb.MessageElement(str(pwd_hist_len),
 134                   ldb.FLAG_MOD_REPLACE, "pwdHistoryLength")
 135                 msgs.append("Password history length changed!")
 136
 137         if opts.min_pwd_length is not None:
 138                 if opts.min_pwd_length == "default":
 139                         min_pwd_len = 7
 140                 else:
 141                         min_pwd_len = int(opts.min_pwd_length)
 142
 143                 if min_pwd_len < 0 or min_pwd_len > 14:
 144                         print "ERROR: Minimum password length must be in the range of 0 to 14!"
 145                         sys.exit(1)
 146
 147                 m["minPwdLength"] = ldb.MessageElement(str(min_pwd_len),
 148                   ldb.FLAG_MOD_REPLACE, "minPwdLength")
 149                 msgs.append("Minimum password length changed!")
 150
 151         if opts.min_pwd_age is not None:
 152                 if opts.min_pwd_age == "default":
 153                         min_pwd_age = 0
 154                 else:
 155                         min_pwd_age = int(opts.min_pwd_age)
 156
 157                 if min_pwd_age < 0 or min_pwd_age > 998:
 158                         print "ERROR: Minimum password age must be in the range of 0 to 998!"
 159                         sys.exit(1)
 160
 161                 # days -> ticks
 162                 min_pwd_age_ticks = -int(min_pwd_age * (24 * 60 * 60 * 1e7))
 163
 164                 m["minPwdAge"] = ldb.MessageElement(str(min_pwd_age_ticks),
 165                   ldb.FLAG_MOD_REPLACE, "minPwdAge")
 166                 msgs.append("Minimum password age changed!")
 167
 168         if opts.max_pwd_age is not None:
 169                 if opts.max_pwd_age == "default":
 170                         max_pwd_age = 43
 171                 else:
 172                         max_pwd_age = int(opts.max_pwd_age)
 173
 174                 if max_pwd_age < 0 or max_pwd_age > 999:
 175                         print "ERROR: Maximum password age must be in the range of 0 to 999!"
 176                         sys.exit(1)
 177
 178                 # days -> ticks
 179                 max_pwd_age_ticks = -int(max_pwd_age * (24 * 60 * 60 * 1e7))
 180
 181                 m["maxPwdAge"] = ldb.MessageElement(str(max_pwd_age_ticks),
 182                   ldb.FLAG_MOD_REPLACE, "maxPwdAge")
 183                 msgs.append("Maximum password age changed!")
 184
 185         if max_pwd_age > 0 and min_pwd_age >= max_pwd_age:
 186                 print "ERROR: Maximum password age (%d) must be greater than minimum password age (%d)!" % (max_pwd_age, min_pwd_age)
 187                 sys.exit(1)
 188
 189         samdb.modify(m)
 190
 191         msgs.append("All changes applied successfully!")
 192
 193         message("\n".join(msgs))
 194 else:
 195         print "ERROR: Wrong argument '" + args[0] + "'!"
 196         sys.exit(1)