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("-H", help="LDB URL for database or target server", type=str)
  43 parser.add_option("--quiet", help="Be quiet", action="store_true")
  44 parser.add_option("--complexity", type="choice", choices=["on","off","default"],
  45   help="The password complexity (on | off | default). Default is 'on'")
  46 parser.add_option("--history-length",
  47   help="The password history length (<integer> | default).  Default is 24.", type=str)
  48 parser.add_option("--min-pwd-length",
  49   help="The minimum password length (<integer> | default).  Default is 7.", type=str)
  50 parser.add_option("--min-pwd-age",
  51   help="The minimum password age (<integer in days> | default).  Default is 0.", type=str)
  52 parser.add_option("--max-pwd-age",
  53   help="The maximum password age (<integer in days> | default).  Default is 43.", type=str)
  54
  55 opts, args = parser.parse_args()
  56
  57 #
  58 #  print a message if quiet is not set
  59 #
  60 def message(text):
  61         if not opts.quiet:
  62                 print text
  63
  64 if len(args) == 0:
  65         parser.print_usage()
  66         sys.exit(1)
  67
  68 lp = sambaopts.get_loadparm()
  69 creds = credopts.get_credentials(lp)
  70
  71 if opts.H is not None:
  72         url = opts.H
  73 else:
  74         url = lp.get("sam database")
  75
  76 samdb = SamDB(url=url, session_info=system_session(), credentials=creds, lp=lp)
  77
  78 domain_dn = SamDB.domain_dn(samdb)
  79 res = samdb.search(domain_dn, scope=ldb.SCOPE_BASE,
  80   attrs=["pwdProperties", "pwdHistoryLength", "minPwdLength", "minPwdAge",
  81   "maxPwdAge"])
  82 assert(len(res) == 1)
  83 try:
  84         pwd_props = int(res[0]["pwdProperties"][0])
  85         pwd_hist_len = int(res[0]["pwdHistoryLength"][0])
  86         min_pwd_len = int(res[0]["minPwdLength"][0])
  87         # ticks -> days
  88         min_pwd_age = int(abs(int(res[0]["minPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  89         max_pwd_age = int(abs(int(res[0]["maxPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  90 except KeyError:
  91         print >>sys.stderr, "ERROR: Could not retrieve password properties!"
  92         if args[0] == "show":
  93                 print >>sys.stderr, "So no settings can be displayed!"
  94         sys.exit(1)
  95
  96 if args[0] == "show":
  97         message("Password informations for domain '" + domain_dn + "'")
  98         message("")
  99         if pwd_props & DOMAIN_PASSWORD_COMPLEX != 0:
 100                 message("Password complexity: on")
 101         else:
 102                 message("Password complexity: off")
 103         message("Password history length: " + str(pwd_hist_len))
 104         message("Minimum password length: " + str(min_pwd_len))
 105         message("Minimum password age (days): " + str(min_pwd_age))
 106         message("Maximum password age (days): " + str(max_pwd_age))
 107
 108 elif args[0] == "set":
 109
 110         msgs = []
 111         m = ldb.Message()
 112         m.dn = ldb.Dn(samdb, domain_dn)
 113
 114         if opts.complexity is not None:
 115                 if opts.complexity == "on" or opts.complexity == "default":
 116                         pwd_props = pwd_props | DOMAIN_PASSWORD_COMPLEX
 117                         msgs.append("Password complexity activated!")
 118                 elif opts.complexity == "off":
 119                         pwd_props = pwd_props & (~DOMAIN_PASSWORD_COMPLEX)
 120                         msgs.append("Password complexity deactivated!")
 121
 122                 m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
 123                   ldb.FLAG_MOD_REPLACE, "pwdProperties")
 124
 125         if opts.history_length is not None:
 126                 if opts.history_length == "default":
 127                         pwd_hist_len = 24
 128                 else:
 129                         pwd_hist_len = int(opts.history_length)
 130
 131                 if pwd_hist_len < 0 or pwd_hist_len > 24:
 132                         print >>sys.stderr, "ERROR: Password history length must be in the range of 0 to 24!"
 133                         sys.exit(1)
 134
 135                 m["pwdHistoryLength"] = ldb.MessageElement(str(pwd_hist_len),
 136                   ldb.FLAG_MOD_REPLACE, "pwdHistoryLength")
 137                 msgs.append("Password history length changed!")
 138
 139         if opts.min_pwd_length is not None:
 140                 if opts.min_pwd_length == "default":
 141                         min_pwd_len = 7
 142                 else:
 143                         min_pwd_len = int(opts.min_pwd_length)
 144
 145                 if min_pwd_len < 0 or min_pwd_len > 14:
 146                         print >>sys.stderr, "ERROR: Minimum password length must be in the range of 0 to 14!"
 147                         sys.exit(1)
 148
 149                 m["minPwdLength"] = ldb.MessageElement(str(min_pwd_len),
 150                   ldb.FLAG_MOD_REPLACE, "minPwdLength")
 151                 msgs.append("Minimum password length changed!")
 152
 153         if opts.min_pwd_age is not None:
 154                 if opts.min_pwd_age == "default":
 155                         min_pwd_age = 0
 156                 else:
 157                         min_pwd_age = int(opts.min_pwd_age)
 158
 159                 if min_pwd_age < 0 or min_pwd_age > 998:
 160                         print >>sys.stderr, "ERROR: Minimum password age must be in the range of 0 to 998!"
 161                         sys.exit(1)
 162
 163                 # days -> ticks
 164                 min_pwd_age_ticks = -int(min_pwd_age * (24 * 60 * 60 * 1e7))
 165
 166                 m["minPwdAge"] = ldb.MessageElement(str(min_pwd_age_ticks),
 167                   ldb.FLAG_MOD_REPLACE, "minPwdAge")
 168                 msgs.append("Minimum password age changed!")
 169
 170         if opts.max_pwd_age is not None:
 171                 if opts.max_pwd_age == "default":
 172                         max_pwd_age = 43
 173                 else:
 174                         max_pwd_age = int(opts.max_pwd_age)
 175
 176                 if max_pwd_age < 0 or max_pwd_age > 999:
 177                         print >>sys.stderr, "ERROR: Maximum password age must be in the range of 0 to 999!"
 178                         sys.exit(1)
 179
 180                 # days -> ticks
 181                 max_pwd_age_ticks = -int(max_pwd_age * (24 * 60 * 60 * 1e7))
 182
 183                 m["maxPwdAge"] = ldb.MessageElement(str(max_pwd_age_ticks),
 184                   ldb.FLAG_MOD_REPLACE, "maxPwdAge")
 185                 msgs.append("Maximum password age changed!")
 186
 187         if max_pwd_age > 0 and min_pwd_age >= max_pwd_age:
 188                 print "ERROR: Maximum password age (%d) must be greater than minimum password age (%d)!" % (max_pwd_age, min_pwd_age)
 189                 sys.exit(1)
 190
 191         samdb.modify(m)
 192
 193         msgs.append("All changes applied successfully!")
 194
 195         message("\n".join(msgs))
 196 else:
 197         print >>sys.stderr, "ERROR: Wrong argument '" + args[0] + "'!"
 198         sys.exit(1)