python/samba/common.py

   1 # Samba common functions
   2 #
   3 # Copyright (C) Matthieu Patou <mat@matws.net>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18
  19
  20 import ldb
  21 import dsdb
  22
  23
  24 def confirm(msg, forced=False, allow_all=False):
  25     """confirm an action with the user
  26
  27     :param msg: A string to print to the user
  28     :param forced: Are the answer forced
  29     """
  30     if forced:
  31         print("%s [YES]" % msg)
  32         return True
  33
  34     mapping = {
  35         'Y': True,
  36         'YES': True,
  37         '': False,
  38         'N': False,
  39         'NO': False,
  40         }
  41
  42     prompt = '[y/N]'
  43
  44     if allow_all:
  45         mapping['ALL'] = 'ALL'
  46         mapping['NONE'] = 'NONE'
  47         prompt = '[y/N/all/none]'
  48
  49     while True:
  50         v = raw_input(msg + ' %s ' % prompt)
  51         v = v.upper()
  52         if v in mapping:
  53             return mapping[v]
  54         print("Unknown response '%s'" % v)
  55
  56
  57 def normalise_int32(ivalue):
  58     '''normalise a ldap integer to signed 32 bit'''
  59     if int(ivalue) & 0x80000000 and int(ivalue) > 0:
  60         return str(int(ivalue) - 0x100000000)
  61     return str(ivalue)
  62
  63
  64 class dsdb_Dn(object):
  65     '''a class for binary DN'''
  66
  67     def __init__(self, samdb, dnstring, syntax_oid=None):
  68         '''create a dsdb_Dn'''
  69         if syntax_oid is None:
  70             # auto-detect based on string
  71             if dnstring.startswith("B:"):
  72                 syntax_oid = dsdb.DSDB_SYNTAX_BINARY_DN
  73             elif dnstring.startswith("S:"):
  74                 syntax_oid = dsdb.DSDB_SYNTAX_STRING_DN
  75             else:
  76                 syntax_oid = dsdb.DSDB_SYNTAX_OR_NAME
  77         if syntax_oid in [dsdb.DSDB_SYNTAX_BINARY_DN, dsdb.DSDB_SYNTAX_STRING_DN]:
  78             # it is a binary DN
  79             colons = dnstring.split(':')
  80             if len(colons) < 4:
  81                 raise RuntimeError("Invalid DN %s" % dnstring)
  82             prefix_len = 4 + len(colons[1]) + int(colons[1])
  83             self.prefix = dnstring[0:prefix_len]
  84             self.binary = self.prefix[3+len(colons[1]):-1]
  85             self.dnstring = dnstring[prefix_len:]
  86         else:
  87             self.dnstring = dnstring
  88             self.prefix = ''
  89             self.binary = ''
  90         self.dn = ldb.Dn(samdb, self.dnstring)
  91
  92     def __str__(self):
  93         return self.prefix + str(self.dn.extended_str(mode=1))
  94
  95     def get_binary_integer(self):
  96         '''return binary part of a dsdb_Dn as an integer, or None'''
  97         if self.prefix == '':
  98             return None
  99         return int(self.binary, 16)