source4/scripting/python/samba/__init__.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 """Samba 4."""
  24
  25 __docformat__ = "restructuredText"
  26
  27 import os
  28
  29 def _in_source_tree():
  30     """Check whether the script is being run from the source dir. """
  31     return os.path.exists("%s/../../../selftest/skip" % os.path.dirname(__file__))
  32
  33
  34 # When running, in-tree, make sure bin/python is in the PYTHONPATH
  35 if _in_source_tree():
  36     import sys
  37     srcdir = "%s/../../.." % os.path.dirname(__file__)
  38     sys.path.append("%s/bin/python" % srcdir)
  39     default_ldb_modules_dir = "%s/bin/modules/ldb" % srcdir
  40 else:
  41     default_ldb_modules_dir = None
  42
  43
  44 import ldb
  45 import glue
  46
  47 class Ldb(ldb.Ldb):
  48     """Simple Samba-specific LDB subclass that takes care
  49     of setting up the modules dir, credentials pointers, etc.
  50
  51     Please note that this is intended to be for all Samba LDB files,
  52     not necessarily the Sam database. For Sam-specific helper
  53     functions see samdb.py.
  54     """
  55     def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
  56                  credentials=None, flags=0, options=None):
  57         """Opens a Samba Ldb file.
  58
  59         :param url: Optional LDB URL to open
  60         :param lp: Optional loadparm object
  61         :param modules_dir: Optional modules directory
  62         :param session_info: Optional session information
  63         :param credentials: Optional credentials, defaults to anonymous.
  64         :param flags: Optional LDB flags
  65         :param options: Additional options (optional)
  66
  67         This is different from a regular Ldb file in that the Samba-specific
  68         modules-dir is used by default and that credentials and session_info
  69         can be passed through (required by some modules).
  70         """
  71
  72         if modules_dir is not None:
  73             self.set_modules_dir(modules_dir)
  74         elif default_ldb_modules_dir is not None:
  75             self.set_modules_dir(default_ldb_modules_dir)
  76         elif lp is not None:
  77             self.set_modules_dir(os.path.join(lp.get("modules dir"), "ldb"))
  78
  79         if session_info is not None:
  80             self.set_session_info(session_info)
  81
  82         if credentials is not None:
  83             self.set_credentials(credentials)
  84
  85         if lp is not None:
  86             self.set_loadparm(lp)
  87
  88         # This must be done before we load the schema, as these handlers for
  89         # objectSid and objectGUID etc must take precedence over the 'binary
  90         # attribute' declaration in the schema
  91         glue.ldb_register_samba_handlers(self)
  92
  93         # TODO set debug
  94         def msg(l,text):
  95             print text
  96         #self.set_debug(msg)
  97
  98         glue.ldb_set_utf8_casefold(self)
  99
 100         # Allow admins to force non-sync ldb for all databases
 101         if lp is not None:
 102             nosync_p = lp.get("nosync", "ldb")
 103             if nosync_p is not None and nosync_p == true:
 104                 flags |= FLG_NOSYNC
 105
 106         self.set_create_perms()
 107
 108         if url is not None:
 109             self.connect(url, flags, options)
 110
 111     def set_session_info(self, session_info):
 112         glue.ldb_set_session_info(self, session_info)
 113
 114     def set_credentials(self, credentials):
 115         glue.ldb_set_credentials(self, credentials)
 116
 117     def set_loadparm(self, lp_ctx):
 118         glue.ldb_set_loadparm(self, lp_ctx)
 119
 120     def set_create_perms(self, perms=0600):
 121         # we usually want Samba databases to be private. If we later find we
 122         # need one public, we will have to change this here
 123         super(Ldb, self).set_create_perms(perms)
 124
 125     def searchone(self, attribute, basedn=None, expression=None,
 126                   scope=ldb.SCOPE_BASE):
 127         """Search for one attribute as a string.
 128
 129         :param basedn: BaseDN for the search.
 130         :param attribute: Name of the attribute
 131         :param expression: Optional search expression.
 132         :param scope: Search scope (defaults to base).
 133         :return: Value of attribute as a string or None if it wasn't found.
 134         """
 135         res = self.search(basedn, scope, expression, [attribute])
 136         if len(res) != 1 or res[0][attribute] is None:
 137             return None
 138         values = set(res[0][attribute])
 139         assert len(values) == 1
 140         return self.schema_format_value(attribute, values.pop())
 141
 142     def erase_users_computers(self, dn):
 143         """Erases user and computer objects from our AD. This is needed since the 'samldb' module denies the deletion of primary groups. Therefore all groups shouldn't be primary somewhere anymore."""
 144
 145         try:
 146             res = self.search(base=dn, scope=ldb.SCOPE_SUBTREE, attrs=[],
 147                       expression="(|(objectclass=user)(objectclass=computer))")
 148         except ldb.LdbError, (ldb.ERR_NO_SUCH_OBJECT, _):
 149             # Ignore no such object errors
 150             return
 151             pass
 152
 153         try:
 154             for msg in res:
 155                 self.delete(msg.dn)
 156         except ldb.LdbError, (ldb.ERR_NO_SUCH_OBJECT, _):
 157             # Ignore no such object errors
 158             return
 159
 160     def erase_except_schema_controlled(self):
 161         """Erase this ldb, removing all records, except those that are controlled by Samba4's schema."""
 162
 163         basedn = ""
 164
 165         # Try to delete user/computer accounts to allow deletion of groups
 166         self.erase_users_computers(basedn)
 167
 168         # Delete the 'visible' records, and the invisble 'deleted' records (if this DB supports it)
 169         for msg in self.search(basedn, ldb.SCOPE_SUBTREE,
 170                                "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))",
 171                                [], controls=["show_deleted:0"]):
 172             try:
 173                 self.delete(msg.dn)
 174             except ldb.LdbError, (ldb.ERR_NO_SUCH_OBJECT, _):
 175                 # Ignore no such object errors
 176                 pass
 177
 178         res = self.search(basedn, ldb.SCOPE_SUBTREE,
 179                           "(&(|(objectclass=*)(distinguishedName=*))(!(distinguishedName=@BASEINFO)))",
 180                           [], controls=["show_deleted:0"])
 181         assert len(res) == 0
 182
 183         # delete the specials
 184         for attr in ["@SUBCLASSES", "@MODULES",
 185                      "@OPTIONS", "@PARTITION", "@KLUDGEACL"]:
 186             try:
 187                 self.delete(attr)
 188             except ldb.LdbError, (ldb.ERR_NO_SUCH_OBJECT, _):
 189                 # Ignore missing dn errors
 190                 pass
 191
 192     def erase(self):
 193         """Erase this ldb, removing all records."""
 194
 195         self.erase_except_schema_controlled()
 196
 197         # delete the specials
 198         for attr in ["@INDEXLIST", "@ATTRIBUTES"]:
 199             try:
 200                 self.delete(attr)
 201             except ldb.LdbError, (ldb.ERR_NO_SUCH_OBJECT, _):
 202                 # Ignore missing dn errors
 203                 pass
 204
 205     def erase_partitions(self):
 206         """Erase an ldb, removing all records."""
 207
 208         def erase_recursive(self, dn):
 209             try:
 210                 res = self.search(base=dn, scope=ldb.SCOPE_ONELEVEL, attrs=[],
 211                                   controls=["show_deleted:0"])
 212             except ldb.LdbError, (ldb.ERR_NO_SUCH_OBJECT, _):
 213                 # Ignore no such object errors
 214                 return
 215                 pass
 216
 217             for msg in res:
 218                 erase_recursive(self, msg.dn)
 219
 220             try:
 221                 self.delete(dn)
 222             except ldb.LdbError, (ldb.ERR_NO_SUCH_OBJECT, _):
 223                 # Ignore no such object errors
 224                 pass
 225
 226         res = self.search("", ldb.SCOPE_BASE, "(objectClass=*)",
 227                          ["namingContexts"])
 228         assert len(res) == 1
 229         if not "namingContexts" in res[0]:
 230             return
 231         for basedn in res[0]["namingContexts"]:
 232             # Try to delete user/computer accounts to allow deletion of groups
 233             self.erase_users_computers(basedn)
 234             # Try and erase from the bottom-up in the tree
 235             erase_recursive(self, basedn)
 236
 237     def load_ldif_file_add(self, ldif_path):
 238         """Load a LDIF file.
 239
 240         :param ldif_path: Path to LDIF file.
 241         """
 242         self.add_ldif(open(ldif_path, 'r').read())
 243
 244     def add_ldif(self, ldif, controls=None):
 245         """Add data based on a LDIF string.
 246
 247         :param ldif: LDIF text.
 248         """
 249         for changetype, msg in self.parse_ldif(ldif):
 250             assert changetype == ldb.CHANGETYPE_NONE
 251             self.add(msg,controls)
 252
 253     def modify_ldif(self, ldif, controls=None):
 254         """Modify database based on a LDIF string.
 255
 256         :param ldif: LDIF text.
 257         """
 258         for changetype, msg in self.parse_ldif(ldif):
 259             self.modify(msg, controls)
 260
 261     def set_domain_sid(self, sid):
 262         """Change the domain SID used by this LDB.
 263
 264         :param sid: The new domain sid to use.
 265         """
 266         glue.samdb_set_domain_sid(self, sid)
 267
 268     def domain_sid(self):
 269         """Read the domain SID used by this LDB.
 270
 271         """
 272         glue.samdb_get_domain_sid(self)
 273
 274     def set_schema_from_ldif(self, pf, df):
 275         glue.dsdb_set_schema_from_ldif(self, pf, df)
 276
 277     def set_schema_from_ldb(self, ldb):
 278         glue.dsdb_set_schema_from_ldb(self, ldb)
 279
 280     def write_prefixes_from_schema(self):
 281         glue.dsdb_write_prefixes_from_schema_to_ldb(self)
 282
 283     def convert_schema_to_openldap(self, target, mapping):
 284         return glue.dsdb_convert_schema_to_openldap(self, target, mapping)
 285
 286     def set_invocation_id(self, invocation_id):
 287         """Set the invocation id for this SamDB handle.
 288
 289         :param invocation_id: GUID of the invocation id.
 290         """
 291         glue.dsdb_set_ntds_invocation_id(self, invocation_id)
 292
 293     def set_opaque_integer(self, name, value):
 294         """Set an integer as an opaque (a flag or other value) value on the database
 295
 296         :param name: The name for the opaque value
 297         :param value: The integer value
 298         """
 299         glue.dsdb_set_opaque_integer(self, name, value)
 300
 301
 302 def substitute_var(text, values):
 303     """substitute strings of the form ${NAME} in str, replacing
 304     with substitutions from subobj.
 305
 306     :param text: Text in which to subsitute.
 307     :param values: Dictionary with keys and values.
 308     """
 309
 310     for (name, value) in values.items():
 311         assert isinstance(name, str), "%r is not a string" % name
 312         assert isinstance(value, str), "Value %r for %s is not a string" % (value, name)
 313         text = text.replace("${%s}" % name, value)
 314
 315     return text
 316
 317
 318 def check_all_substituted(text):
 319     """Make sure that all substitution variables in a string have been replaced.
 320     If not, raise an exception.
 321
 322     :param text: The text to search for substitution variables
 323     """
 324     if not "${" in text:
 325         return
 326
 327     var_start = text.find("${")
 328     var_end = text.find("}", var_start)
 329
 330     raise Exception("Not all variables substituted: %s" % text[var_start:var_end+1])
 331
 332
 333 def read_and_sub_file(file, subst_vars):
 334     """Read a file and sub in variables found in it
 335
 336     :param file: File to be read (typically from setup directory)
 337      param subst_vars: Optional variables to subsitute in the file.
 338     """
 339     data = open(file, 'r').read()
 340     if subst_vars is not None:
 341         data = substitute_var(data, subst_vars)
 342     check_all_substituted(data)
 343     return data
 344
 345
 346 def setup_file(template, fname, subst_vars=None):
 347     """Setup a file in the private dir.
 348
 349     :param template: Path of the template file.
 350     :param fname: Path of the file to create.
 351     :param subst_vars: Substitution variables.
 352     """
 353     f = fname
 354
 355     if os.path.exists(f):
 356         os.unlink(f)
 357
 358     data = read_and_sub_file(template, subst_vars)
 359     open(f, 'w').write(data)
 360
 361
 362 def valid_netbios_name(name):
 363     """Check whether a name is valid as a NetBIOS name. """
 364     # See crh's book (1.4.1.1)
 365     if len(name) > 15:
 366         return False
 367     for x in name:
 368         if not x.isalnum() and not x in " !#$%&'()-.@^_{}~":
 369             return False
 370     return True
 371
 372
 373 def dom_sid_to_rid(sid_str):
 374     """Converts a domain SID to the relative RID.
 375
 376     :param sid_str: The domain SID formatted as string
 377     """
 378
 379     return glue.dom_sid_to_rid(sid_str)
 380
 381
 382 version = glue.version
 383
 384 # "userAccountControl" flags
 385 UF_NORMAL_ACCOUNT = glue.UF_NORMAL_ACCOUNT
 386 UF_TEMP_DUPLICATE_ACCOUNT = glue.UF_TEMP_DUPLICATE_ACCOUNT
 387 UF_SERVER_TRUST_ACCOUNT = glue.UF_SERVER_TRUST_ACCOUNT
 388 UF_WORKSTATION_TRUST_ACCOUNT = glue.UF_WORKSTATION_TRUST_ACCOUNT
 389 UF_INTERDOMAIN_TRUST_ACCOUNT = glue.UF_INTERDOMAIN_TRUST_ACCOUNT
 390 UF_PASSWD_NOTREQD = glue.UF_PASSWD_NOTREQD
 391 UF_ACCOUNTDISABLE = glue.UF_ACCOUNTDISABLE
 392
 393 # "groupType" flags
 394 GTYPE_SECURITY_BUILTIN_LOCAL_GROUP = glue.GTYPE_SECURITY_BUILTIN_LOCAL_GROUP
 395 GTYPE_SECURITY_GLOBAL_GROUP = glue.GTYPE_SECURITY_GLOBAL_GROUP
 396 GTYPE_SECURITY_DOMAIN_LOCAL_GROUP = glue.GTYPE_SECURITY_DOMAIN_LOCAL_GROUP
 397 GTYPE_SECURITY_UNIVERSAL_GROUP = glue.GTYPE_SECURITY_UNIVERSAL_GROUP
 398 GTYPE_DISTRIBUTION_GLOBAL_GROUP = glue.GTYPE_DISTRIBUTION_GLOBAL_GROUP
 399 GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP = glue.GTYPE_DISTRIBUTION_DOMAIN_LOCAL_GROUP
 400 GTYPE_DISTRIBUTION_UNIVERSAL_GROUP = glue.GTYPE_DISTRIBUTION_UNIVERSAL_GROUP
 401
 402 # "sAMAccountType" flags
 403 ATYPE_NORMAL_ACCOUNT = glue.ATYPE_NORMAL_ACCOUNT
 404 ATYPE_WORKSTATION_TRUST = glue.ATYPE_WORKSTATION_TRUST
 405 ATYPE_INTERDOMAIN_TRUST = glue.ATYPE_INTERDOMAIN_TRUST
 406 ATYPE_SECURITY_GLOBAL_GROUP = glue.ATYPE_SECURITY_GLOBAL_GROUP
 407 ATYPE_SECURITY_LOCAL_GROUP = glue.ATYPE_SECURITY_LOCAL_GROUP
 408 ATYPE_SECURITY_UNIVERSAL_GROUP = glue.ATYPE_SECURITY_UNIVERSAL_GROUP
 409 ATYPE_DISTRIBUTION_GLOBAL_GROUP = glue.ATYPE_DISTRIBUTION_GLOBAL_GROUP
 410 ATYPE_DISTRIBUTION_LOCAL_GROUP = glue.ATYPE_DISTRIBUTION_LOCAL_GROUP
 411 ATYPE_DISTRIBUTION_UNIVERSAL_GROUP = glue.ATYPE_DISTRIBUTION_UNIVERSAL_GROUP
 412
 413 # "domainFunctionality", "forestFunctionality" flags in the rootDSE */
 414 DS_DOMAIN_FUNCTION_2000 = glue.DS_DOMAIN_FUNCTION_2000
 415 DS_DOMAIN_FUNCTION_2003_MIXED = glue.DS_DOMAIN_FUNCTION_2003_MIXED
 416 DS_DOMAIN_FUNCTION_2003 = glue.DS_DOMAIN_FUNCTION_2003
 417 DS_DOMAIN_FUNCTION_2008 = glue.DS_DOMAIN_FUNCTION_2008
 418 DS_DOMAIN_FUNCTION_2008_R2 = glue.DS_DOMAIN_FUNCTION_2008_R2
 419
 420 # "domainControllerFunctionality" flags in the rootDSE */
 421 DS_DC_FUNCTION_2000 = glue.DS_DC_FUNCTION_2000
 422 DS_DC_FUNCTION_2003 = glue.DS_DC_FUNCTION_2003
 423 DS_DC_FUNCTION_2008 = glue.DS_DC_FUNCTION_2008
 424 DS_DC_FUNCTION_2008_R2 = glue.DS_DC_FUNCTION_2008_R2
 425
 426 #LDAP_SERVER_SD_FLAGS_OID flags
 427 SECINFO_OWNER = glue.SECINFO_OWNER
 428 SECINFO_GROUP = glue.SECINFO_GROUP
 429 SECINFO_DACL  = glue.SECINFO_DACL
 430 SECINFO_SACL  = glue.SECINFO_SACL
 431