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#!/usr/bin/python
#
# Sets password settings (Password complexity, history length,
# minimum password length, the minimum and maximum password age) on a
# Samba4 server
#
# Copyright Jelmer Vernooij 2008
# Copyright Matthias Dieter Wallnoefer 2009
# Released under the GNU GPL version 3 or later
#
import os, sys
sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), "../bin/python"))
import samba.getopt as options
import optparse
import pwd
import ldb
from samba.auth import system_session
from samba.samdb import SamDB
from samba.dcerpc.samr import DOMAIN_PASSWORD_COMPLEX
parser = optparse.OptionParser("pwsettings (show | set <options>)")
sambaopts = options.SambaOptions(parser)
parser.add_option_group(sambaopts)
parser.add_option_group(options.VersionOptions(parser))
credopts = options.CredentialsOptions(parser)
parser.add_option_group(credopts)
parser.add_option("-H", help="LDB URL for database or target server", type=str)
parser.add_option("--complexity",
help="The password complexity (on | off). Default is 'on'", type=str)
parser.add_option("--history-length",
help="The password history length (<integer> | default)", type=str)
parser.add_option("--min-pwd-length",
help="The minimum password length (<integer> | default)", type=str)
parser.add_option("--min-pwd-age",
help="The minimum password age (<integer in days> | default)", type=str)
parser.add_option("--max-pwd-age",
help="The maximum password age (<integer in days> | default)", type=str)
opts, args = parser.parse_args()
#
# print a message if quiet is not set
#
def message(text):
if not opts.quiet:
print text
if len(args) == 0:
parser.print_usage()
sys.exit(1)
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
if opts.H is not None:
url = opts.H
else:
url = lp.get("sam database")
samdb = SamDB(url=url, session_info=system_session(),
credentials=creds, lp=lp)
res = samdb.search("", scope=ldb.SCOPE_BASE,
expression="(defaultNamingContext=*)",
attrs=["defaultNamingContext"])
assert(len(res) == 1 and res[0]["defaultNamingContext"] is not None)
domain_dn = res[0]["defaultNamingContext"][0]
res = samdb.search(domain_dn, scope=ldb.SCOPE_BASE, attrs=["pwdProperties",
"pwdHistoryLength", "minPwdLength", "minPwdAge", "maxPwdAge"])
assert(len(res) == 1)
try:
pwd_props = int(res[0]["pwdProperties"][0])
pwd_hist_len = int(res[0]["pwdHistoryLength"][0])
min_pwd_len = int(res[0]["minPwdLength"][0])
# ticks -> days
min_pwd_age = int(abs(int(res[0]["minPwdAge"][0])) / (10e7 * 60 * 60 * 24))
max_pwd_age = int(abs(int(res[0]["maxPwdAge"][0])) / (10e7 * 60 * 60 * 24))
except:
if args[0] == "show":
print "ERROR: Password informations missing in your AD domain object!"
print "So no settings can be displayed!"
sys.exit(1)
else:
if pwd_props is None:
pwd_props = 0
print "WARNING: Assuming previous password properties 0 (used for password complexity setting)"
if args[0] == "show":
print "Password informations for domain '" + domain_dn + "'"
print ""
if pwd_props & DOMAIN_PASSWORD_COMPLEX != 0:
print "Password complexity: on"
else:
print "Password complexity: off"
print "Password history length: " + str(pwd_hist_len)
print "Minimum password length: " + str(min_pwd_len)
print "Minimum password age (days): " + str(min_pwd_age)
print "Maximum password age (days): " + str(max_pwd_age)
elif args[0] == "set":
if opts.complexity is not None:
if opts.complexity == "on":
pwd_props = pwd_props | DOMAIN_PASSWORD_COMPLEX
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["pwdProperties"] = ldb.MessageElement([],
ldb.CHANGETYPE_DELETE, "pwdProperties")
samdb.modify(m)
m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
ldb.CHANGETYPE_ADD, "pwdProperties")
samdb.modify(m)
print "Password complexity activated!"
elif opts.complexity == "off":
pwd_props = pwd_props & (~DOMAIN_PASSWORD_COMPLEX)
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["pwdProperties"] = ldb.MessageElement([],
ldb.CHANGETYPE_DELETE, "pwdProperties")
samdb.modify(m)
m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
ldb.CHANGETYPE_ADD, "pwdProperties")
samdb.modify(m)
print "Password complexity deactivated!"
else:
print "ERROR: Wrong argument '" + opts.complexity + "'!"
sys.exit(1)
if opts.history_length is not None:
if opts.history_length == "default":
pwd_hist_len = 24
else:
pwd_hist_len = int(opts.history_length)
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["pwdHistoryLength"] = ldb.MessageElement([],
ldb.CHANGETYPE_DELETE, "pwdHistoryLength")
samdb.modify(m)
m["pwdHistoryLength"] = ldb.MessageElement(str(pwd_hist_len),
ldb.CHANGETYPE_ADD, "pwdHistoryLength")
samdb.modify(m)
print "Password history length changed!"
if opts.min_pwd_length is not None:
if opts.min_pwd_length == "default":
min_pwd_len = 7
else:
min_pwd_len = int(opts.min_pwd_length)
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["minPwdLength"] = ldb.MessageElement([],
ldb.CHANGETYPE_DELETE, "minPwdLength")
samdb.modify(m)
m["minPwdLength"] = ldb.MessageElement(str(min_pwd_len),
ldb.CHANGETYPE_ADD, "minPwdLength")
samdb.modify(m)
print "Minimum password length changed!"
if opts.min_pwd_age is not None:
if opts.min_pwd_age == "default":
min_pwd_age = 0
else:
min_pwd_age = int(opts.min_pwd_age)
# days -> ticks
min_pwd_age = -int(min_pwd_age * (24 * 60 * 60 * 10e7))
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["minPwdAge"] = ldb.MessageElement([],
ldb.CHANGETYPE_DELETE, "minPwdAge")
samdb.modify(m)
m["minPwdAge"] = ldb.MessageElement(str(min_pwd_age),
ldb.CHANGETYPE_ADD, "minPwdAge")
samdb.modify(m)
print "Minimum password age changed!"
if opts.max_pwd_age is not None:
if opts.max_pwd_age == "default":
max_pwd_age = 43
else:
max_pwd_age = int(opts.max_pwd_age)
# days -> ticks
max_pwd_age = -int(max_pwd_age * (24 * 60 * 60 * 10e7))
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
m["maxPwdAge"] = ldb.MessageElement([],
ldb.CHANGETYPE_DELETE, "maxPwdAge")
samdb.modify(m)
m["maxPwdAge"] = ldb.MessageElement(str(max_pwd_age),
ldb.CHANGETYPE_ADD, "maxPwdAge")
samdb.modify(m)
print "Maximum password age changed!"
print "All changes applied successfully!"
else:
print "ERROR: Wrong argument '" + args[0] + "'!"
sys.exit(1)
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