source4/setup/pwsettings

   1 #!/usr/bin/python
   2 #
   3 #       Sets password settings (Password complexity, history length,
   4 #       minimum password length, the minimum and maximum password age) on a
   5 #       Samba4 server
   6 #
   7 #       Copyright Jelmer Vernooij 2008
   8 #       Copyright Matthias Dieter Wallnoefer 2009
   9 #       Copyright Andrew Kroeger 2009
  10 #       Released under the GNU GPL version 3 or later
  11 #
  12 import os, sys
  13
  14 sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), "../bin/python"))
  15
  16 import samba.getopt as options
  17 import optparse
  18 import ldb
  19
  20 from samba.auth import system_session
  21 from samba.samdb import SamDB
  22 from samba.dcerpc.samr import DOMAIN_PASSWORD_COMPLEX
  23
  24 parser = optparse.OptionParser("pwsettings (show | set <options>)")
  25 sambaopts = options.SambaOptions(parser)
  26 parser.add_option_group(sambaopts)
  27 parser.add_option_group(options.VersionOptions(parser))
  28 credopts = options.CredentialsOptions(parser)
  29 parser.add_option_group(credopts)
  30 parser.add_option("--quiet", help="Be quiet", action="store_true")
  31 parser.add_option("-H", help="LDB URL for database or target server", type=str)
  32 parser.add_option("--complexity",
  33   help="The password complexity (on | off | default). Default is 'on'", type=str)
  34 parser.add_option("--history-length",
  35   help="The password history length (<integer> | default).  Default is 24.", type=str)
  36 parser.add_option("--min-pwd-length",
  37   help="The minimum password length (<integer> | default).  Default is 7.", type=str)
  38 parser.add_option("--min-pwd-age",
  39   help="The minimum password age (<integer in days> | default).  Default is 0.", type=str)
  40 parser.add_option("--max-pwd-age",
  41   help="The maximum password age (<integer in days> | default).  Default is 43.", type=str)
  42
  43 opts, args = parser.parse_args()
  44
  45 #
  46 #  print a message if quiet is not set
  47 #
  48 def message(text):
  49         if not opts.quiet:
  50                 print text
  51
  52 if len(args) == 0:
  53         parser.print_usage()
  54         sys.exit(1)
  55
  56 lp = sambaopts.get_loadparm()
  57
  58 creds = credopts.get_credentials(lp)
  59
  60 if opts.H is not None:
  61         url = opts.H
  62 else:
  63         url = lp.get("sam database")
  64
  65 samdb = SamDB(url=url, session_info=system_session(),
  66               credentials=creds, lp=lp)
  67
  68 domain_dn = SamDB.domain_dn(samdb)
  69 res = samdb.search(domain_dn, scope=ldb.SCOPE_BASE,
  70   attrs=["pwdProperties", "pwdHistoryLength", "minPwdLength", "minPwdAge",
  71   "maxPwdAge"])
  72 assert(len(res) == 1)
  73 try:
  74         pwd_props = int(res[0]["pwdProperties"][0])
  75         pwd_hist_len = int(res[0]["pwdHistoryLength"][0])
  76         min_pwd_len = int(res[0]["minPwdLength"][0])
  77         # ticks -> days
  78         min_pwd_age = int(abs(int(res[0]["minPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  79         max_pwd_age = int(abs(int(res[0]["maxPwdAge"][0])) / (1e7 * 60 * 60 * 24))
  80 except:
  81         print "ERROR: Could not retrieve password properties!"
  82         if args[0] == "show":
  83                 print "So no settings can be displayed!"
  84         sys.exit(1)
  85
  86 if args[0] == "show":
  87         message("Password informations for domain '" + domain_dn + "'")
  88         message("")
  89         if pwd_props & DOMAIN_PASSWORD_COMPLEX != 0:
  90                 message("Password complexity: on")
  91         else:
  92                 message("Password complexity: off")
  93         message("Password history length: " + str(pwd_hist_len))
  94         message("Minimum password length: " + str(min_pwd_len))
  95         message("Minimum password age (days): " + str(min_pwd_age))
  96         message("Maximum password age (days): " + str(max_pwd_age))
  97
  98 elif args[0] == "set":
  99
 100         msgs = []
 101         m = ldb.Message()
 102         m.dn = ldb.Dn(samdb, domain_dn)
 103
 104         if opts.complexity is not None:
 105                 if opts.complexity == "on" or opts.complexity == "default":
 106                         pwd_props = pwd_props | DOMAIN_PASSWORD_COMPLEX
 107                         msgs.append("Password complexity activated!")
 108                 elif opts.complexity == "off":
 109                         pwd_props = pwd_props & (~DOMAIN_PASSWORD_COMPLEX)
 110                         msgs.append("Password complexity deactivated!")
 111                 else:
 112                         print "ERROR: Wrong argument '" + opts.complexity + "'!"
 113                         sys.exit(1)
 114
 115                 m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
 116                   ldb.FLAG_MOD_REPLACE, "pwdProperties")
 117
 118         if opts.history_length is not None:
 119                 if opts.history_length == "default":
 120                         pwd_hist_len = 24
 121                 else:
 122                         pwd_hist_len = int(opts.history_length)
 123
 124                 if pwd_hist_len < 0 or pwd_hist_len > 24:
 125                         print "ERROR: Password history length must be in the range of 0 to 24!"
 126                         sys.exit(1)
 127
 128                 m["pwdHistoryLength"] = ldb.MessageElement(str(pwd_hist_len),
 129                   ldb.FLAG_MOD_REPLACE, "pwdHistoryLength")
 130                 msgs.append("Password history length changed!")
 131
 132         if opts.min_pwd_length is not None:
 133                 if opts.min_pwd_length == "default":
 134                         min_pwd_len = 7
 135                 else:
 136                         min_pwd_len = int(opts.min_pwd_length)
 137
 138                 if min_pwd_len < 0 or min_pwd_len > 14:
 139                         print "ERROR: Minimum password length must be in the range of 0 to 14!"
 140                         sys.exit(1)
 141
 142                 m["minPwdLength"] = ldb.MessageElement(str(min_pwd_len),
 143                   ldb.FLAG_MOD_REPLACE, "minPwdLength")
 144                 msgs.append("Minimum password length changed!")
 145
 146         if opts.min_pwd_age is not None:
 147                 if opts.min_pwd_age == "default":
 148                         min_pwd_age = 0
 149                 else:
 150                         min_pwd_age = int(opts.min_pwd_age)
 151
 152                 if min_pwd_age < 0 or min_pwd_age > 998:
 153                         print "ERROR: Minimum password age must be in the range of 0 to 998!"
 154                         sys.exit(1)
 155
 156                 # days -> ticks
 157                 min_pwd_age_ticks = -int(min_pwd_age * (24 * 60 * 60 * 1e7))
 158
 159                 m["minPwdAge"] = ldb.MessageElement(str(min_pwd_age_ticks),
 160                   ldb.FLAG_MOD_REPLACE, "minPwdAge")
 161                 msgs.append("Minimum password age changed!")
 162
 163         if opts.max_pwd_age is not None:
 164                 if opts.max_pwd_age == "default":
 165                         max_pwd_age = 43
 166                 else:
 167                         max_pwd_age = int(opts.max_pwd_age)
 168
 169                 if max_pwd_age < 0 or max_pwd_age > 999:
 170                         print "ERROR: Maximum password age must be in the range of 0 to 999!"
 171                         sys.exit(1)
 172
 173                 # days -> ticks
 174                 max_pwd_age_ticks = -int(max_pwd_age * (24 * 60 * 60 * 1e7))
 175
 176                 m["maxPwdAge"] = ldb.MessageElement(str(max_pwd_age_ticks),
 177                   ldb.FLAG_MOD_REPLACE, "maxPwdAge")
 178                 msgs.append("Maximum password age changed!")
 179
 180         if max_pwd_age > 0 and min_pwd_age >= max_pwd_age:
 181                 print "ERROR: Maximum password age (%d) must be greater than minimum password age (%d)!" % (max_pwd_age, min_pwd_age)
 182                 sys.exit(1)
 183
 184         samdb.modify(m)
 185
 186         msgs.append("All changes applied successfully!")
 187
 188         message("\n".join(msgs))
 189 else:
 190         print "ERROR: Wrong argument '" + args[0] + "'!"
 191         sys.exit(1)