source4/scripting/python/samba/samdb.py

   1 #!/usr/bin/python
   2
   3 # Unix SMB/CIFS implementation.
   4 # Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2008
   5 #
   6 # Based on the original in EJS:
   7 # Copyright (C) Andrew Tridgell <tridge@samba.org> 2005
   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 """Convenience functions for using the SAM."""
  24
  25 import samba
  26 import glue
  27 import ldb
  28 from samba.idmap import IDmapDB
  29 import pwd
  30 import time
  31
  32 __docformat__ = "restructuredText"
  33
  34 class SamDB(samba.Ldb):
  35     """The SAM database."""
  36
  37     def __init__(self, url=None, session_info=None, credentials=None,
  38                  modules_dir=None, lp=None):
  39         """Open the Sam Database.
  40
  41         :param url: URL of the database.
  42         """
  43         self.lp = lp
  44         super(SamDB, self).__init__(session_info=session_info, credentials=credentials,
  45                                     modules_dir=modules_dir, lp=lp)
  46         glue.dsdb_set_global_schema(self)
  47         if url:
  48             self.connect(url)
  49         else:
  50             self.connect(lp.get("sam database"))
  51
  52     def connect(self, url):
  53         super(SamDB, self).connect(self.lp.private_path(url))
  54
  55     def add_foreign(self, domaindn, sid, desc):
  56         """Add a foreign security principle."""
  57         add = """
  58 dn: CN=%s,CN=ForeignSecurityPrincipals,%s
  59 objectClass: top
  60 objectClass: foreignSecurityPrincipal
  61 description: %s
  62         """ % (sid, domaindn, desc)
  63         # deliberately ignore errors from this, as the records may
  64         # already exist
  65         for msg in self.parse_ldif(add):
  66             self.add(msg[1])
  67
  68     def enable_account(self, user_dn):
  69         """Enable an account.
  70
  71         :param user_dn: Dn of the account to enable.
  72         """
  73         res = self.search(user_dn, ldb.SCOPE_BASE, None, ["userAccountControl"])
  74         assert len(res) == 1
  75         userAccountControl = res[0]["userAccountControl"][0]
  76         userAccountControl = int(userAccountControl)
  77         if (userAccountControl & 0x2):
  78             userAccountControl = userAccountControl & ~0x2 # remove disabled bit
  79         if (userAccountControl & 0x20):
  80             userAccountControl = userAccountControl & ~0x20 # remove 'no password required' bit
  81
  82         mod = """
  83 dn: %s
  84 changetype: modify
  85 replace: userAccountControl
  86 userAccountControl: %u
  87 """ % (user_dn, userAccountControl)
  88         self.modify_ldif(mod)
  89
  90     def domain_dn(self):
  91         # find the DNs for the domain and the domain users group
  92         res = self.search("", scope=ldb.SCOPE_BASE,
  93                           expression="(defaultNamingContext=*)",
  94                           attrs=["defaultNamingContext"])
  95         assert(len(res) == 1 and res[0]["defaultNamingContext"] is not None)
  96         return res[0]["defaultNamingContext"][0]
  97
  98     def newuser(self, username, unixname, password):
  99         """add a new user record.
 100
 101         :param username: Name of the new user.
 102         :param unixname: Name of the unix user to map to.
 103         :param password: Password for the new user
 104         """
 105         # connect to the sam
 106         self.transaction_start()
 107
 108         domain_dn = self.domain_dn()
 109         assert(domain_dn is not None)
 110         user_dn = "CN=%s,CN=Users,%s" % (username, domain_dn)
 111
 112         #
 113         #  the new user record. note the reliance on the samdb module to fill
 114         #  in a sid, guid etc
 115         #
 116         #  now the real work
 117         self.add({"dn": user_dn,
 118             "sAMAccountName": username,
 119             "userPassword": password,
 120             "objectClass": "user"})
 121
 122         res = self.search(user_dn, scope=ldb.SCOPE_BASE,
 123                           expression="objectclass=*",
 124                           attrs=["objectSid"])
 125         assert(len(res) == 1)
 126         user_sid = self.schema_format_value("objectSid", res[0]["objectSid"][0])
 127
 128
 129         try:
 130             idmap = IDmapDB(lp=self.lp)
 131
 132             user = pwd.getpwnam(unixname)
 133             # setup ID mapping for this UID
 134
 135             idmap.setup_name_mapping(user_sid, idmap.TYPE_UID, user[2])
 136
 137         except KeyError:
 138             pass
 139
 140         #  modify the userAccountControl to remove the disabled bit
 141         self.enable_account(user_dn)
 142         self.transaction_commit()
 143
 144     def setpassword(self, filter, password):
 145         """Set a password on a user record
 146
 147         :param filter: LDAP filter to find the user (eg samccountname=name)
 148         :param password: Password for the user
 149         """
 150         # connect to the sam
 151         self.transaction_start()
 152
 153         # find the DNs for the domain
 154         res = self.search("", scope=ldb.SCOPE_BASE,
 155                           expression="(defaultNamingContext=*)",
 156                           attrs=["defaultNamingContext"])
 157         assert(len(res) == 1 and res[0]["defaultNamingContext"] is not None)
 158         domain_dn = res[0]["defaultNamingContext"][0]
 159         assert(domain_dn is not None)
 160
 161         res = self.search(domain_dn, scope=ldb.SCOPE_SUBTREE,
 162                           expression=filter,
 163                           attrs=[])
 164         assert(len(res) == 1)
 165         user_dn = res[0].dn
 166
 167         setpw = """
 168 dn: %s
 169 changetype: modify
 170 replace: userPassword
 171 userPassword: %s
 172 """ % (user_dn, password)
 173
 174         self.modify_ldif(setpw)
 175
 176         #  modify the userAccountControl to remove the disabled bit
 177         self.enable_account(user_dn)
 178         self.transaction_commit()
 179
 180     def set_domain_sid(self, sid):
 181         """Change the domain SID used by this SamDB.
 182
 183         :param sid: The new domain sid to use.
 184         """
 185         glue.samdb_set_domain_sid(self, sid)
 186
 187     def attach_schema_from_ldif(self, pf, df):
 188         glue.dsdb_attach_schema_from_ldif_file(self, pf, df)
 189
 190     def set_invocation_id(self, invocation_id):
 191         """Set the invocation id for this SamDB handle.
 192
 193         :param invocation_id: GUID of the invocation id.
 194         """
 195         glue.dsdb_set_ntds_invocation_id(self, invocation_id)
 196
 197     def setexpiry(self, user, expiry_seconds, noexpiry):
 198         """Set the password expiry for a user
 199
 200         :param expiry_seconds: expiry time from now in seconds
 201         :param noexpiry: if set, then don't expire password
 202         """
 203         self.transaction_start();
 204         res = self.search(base=self.domain_dn(), scope=ldb.SCOPE_SUBTREE,
 205                           expression=("(samAccountName=%s)" % user),
 206                           attrs=["userAccountControl", "accountExpires"])
 207         assert len(res) == 1
 208         userAccountControl = int(res[0]["userAccountControl"][0])
 209         accountExpires     = int(res[0]["accountExpires"][0])
 210         if noexpiry:
 211             userAccountControl = userAccountControl | 0x10000
 212             accountExpires = 0
 213         else:
 214             userAccountControl = userAccountControl & ~0x10000
 215             accountExpires = glue.unix2nttime(expiry_seconds + int(time.time()))
 216
 217         mod = """
 218 dn: %s
 219 changetype: modify
 220 replace: userAccountControl
 221 userAccountControl: %u
 222 replace: accountExpires
 223 accountExpires: %u
 224 """ % (res[0].dn, userAccountControl, accountExpires)
 225         # now change the database
 226         self.modify_ldif(mod)
 227         self.transaction_commit();