1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
#!/usr/bin/python
#
# Sets password settings.
# (Password complexity, history length, minimum password length, the minimum
# and maximum password age) on a Samba4 server
#
# Copyright Matthias Dieter Wallnoefer 2009
# Copyright Andrew Kroeger 2009
# Copyright Jelmer Vernooij 2009
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import sys
import samba.getopt as options
import optparse
import ldb
from samba.auth import system_session
from samba.samdb import SamDB
from samba.dcerpc.samr import DOMAIN_PASSWORD_COMPLEX
from samba.netcmd import Command, CommandError, Option
class cmd_pwsettings(Command):
"""Sets password settings.
Password complexity, history length, minimum password length, the minimum
and maximum password age) on a Samba4 server.
"""
synopsis = "(show | set <options>)"
takes_optiongroups = {
"sambaopts": options.SambaOptions,
"versionopts": options.VersionOptions,
"credopts": options.CredentialsOptions,
}
takes_options = [
Option("-H", help="LDB URL for database or target server", type=str),
Option("--quiet", help="Be quiet", action="store_true"),
Option("--complexity", type="choice", choices=["on","off","default"],
help="The password complexity (on | off | default). Default is 'on'"),
Option("--history-length",
help="The password history length (<integer> | default). Default is 24.", type=str),
Option("--min-pwd-length",
help="The minimum password length (<integer> | default). Default is 7.", type=str),
Option("--min-pwd-age",
help="The minimum password age (<integer in days> | default). Default is 0.", type=str),
Option("--max-pwd-age",
help="The maximum password age (<integer in days> | default). Default is 43.", type=str),
]
takes_args = ["subcommand"]
def run(self, subcommand, H=None, min_pwd_age=None, max_pwd_age=None,
quiet=False, complexity=None, history_length=None,
min_pwd_length=None, credopts=None, sambaopts=None,
versionopts=None):
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
if H is not None:
url = H
else:
url = lp.get("sam database")
samdb = SamDB(url=url, session_info=system_session(),
credentials=creds, lp=lp)
domain_dn = SamDB.domain_dn(samdb)
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])) / (1e7 * 60 * 60 * 24))
max_pwd_age = int(abs(int(res[0]["maxPwdAge"][0])) / (1e7 * 60 * 60 * 24))
except KeyError:
raise CommandError("Could not retrieve password properties!")
if subcommand == "show":
self.message("Password informations for domain '%s'" % domain_dn)
self.message("")
if pwd_props & DOMAIN_PASSWORD_COMPLEX != 0:
self.message("Password complexity: on")
else:
self.message("Password complexity: off")
self.message("Password history length: %d" % pwd_hist_len)
self.message("Minimum password length: %d" % min_pwd_len)
self.message("Minimum password age (days): %d" % min_pwd_age)
self.message("Maximum password age (days): %d" % max_pwd_age)
elif subcommand == "set":
msgs = []
m = ldb.Message()
m.dn = ldb.Dn(samdb, domain_dn)
if complexity is not None:
if complexity == "on" or complexity == "default":
pwd_props = pwd_props | DOMAIN_PASSWORD_COMPLEX
msgs.append("Password complexity activated!")
elif complexity == "off":
pwd_props = pwd_props & (~DOMAIN_PASSWORD_COMPLEX)
msgs.append("Password complexity deactivated!")
m["pwdProperties"] = ldb.MessageElement(str(pwd_props),
ldb.FLAG_MOD_REPLACE, "pwdProperties")
if history_length is not None:
if history_length == "default":
pwd_hist_len = 24
else:
pwd_hist_len = int(history_length)
if pwd_hist_len < 0 or pwd_hist_len > 24:
raise CommandError("Password history length must be in the range of 0 to 24!")
m["pwdHistoryLength"] = ldb.MessageElement(str(pwd_hist_len),
ldb.FLAG_MOD_REPLACE, "pwdHistoryLength")
msgs.append("Password history length changed!")
if min_pwd_length is not None:
if min_pwd_length == "default":
min_pwd_len = 7
else:
min_pwd_len = int(min_pwd_length)
if min_pwd_len < 0 or min_pwd_len > 14:
raise CommandError("Minimum password length must be in the range of 0 to 14!")
m["minPwdLength"] = ldb.MessageElement(str(min_pwd_len),
ldb.FLAG_MOD_REPLACE, "minPwdLength")
msgs.append("Minimum password length changed!")
if min_pwd_age is not None:
if min_pwd_age == "default":
min_pwd_age = 0
else:
min_pwd_age = int(min_pwd_age)
if min_pwd_age < 0 or min_pwd_age > 998:
raise CommandError("Minimum password age must be in the range of 0 to 998!")
# days -> ticks
min_pwd_age_ticks = -int(min_pwd_age * (24 * 60 * 60 * 1e7))
m["minPwdAge"] = ldb.MessageElement(str(min_pwd_age_ticks),
ldb.FLAG_MOD_REPLACE, "minPwdAge")
msgs.append("Minimum password age changed!")
if max_pwd_age is not None:
if max_pwd_age == "default":
max_pwd_age = 43
else:
max_pwd_age = int(max_pwd_age)
if max_pwd_age < 0 or max_pwd_age > 999:
raise CommandError("Maximum password age must be in the range of 0 to 999!")
# days -> ticks
max_pwd_age_ticks = -int(max_pwd_age * (24 * 60 * 60 * 1e7))
m["maxPwdAge"] = ldb.MessageElement(str(max_pwd_age_ticks),
ldb.FLAG_MOD_REPLACE, "maxPwdAge")
msgs.append("Maximum password age changed!")
if max_pwd_age > 0 and min_pwd_age >= max_pwd_age:
raise CommandError("Maximum password age (%d) must be greater than minimum password age (%d)!" % (max_pwd_age, min_pwd_age))
samdb.modify(m)
msgs.append("All changes applied successfully!")
self.message("\n".join(msgs))
else:
raise CommandError("Wrong argument '%s'!" % subcommand)
|
