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ndr.py
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# -*- coding: utf-8 -*- # Unix SMB/CIFS implementation. # Copyright © Jelmer Vernooij <jelmer@samba.org> 2008 # # 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/>. # """Network Data Representation (NDR) marshalling and unmarshalling.""" def ndr_pack(object): """Pack a NDR object. :param object: Object to pack :return: String object with marshalled object. """ ndr_pack = getattr(object, "__ndr_pack__", None) if ndr_pack is None: raise TypeError("%r is not a NDR object" % object) return ndr_pack() def ndr_unpack(cls, data, allow_remaining=False): """NDR unpack an object. :param cls: Class of the object to unpack :param data: Buffer to unpack :param allow_remaining: allows remaining data at the end (default=False) :return: Unpacked object """ object = cls() ndr_unpack = getattr(object, "__ndr_unpack__", None) if ndr_unpack is None: raise TypeError("%r is not a NDR object" % object) ndr_unpack(data, allow_remaining=allow_remaining) return object def ndr_print(object): ndr_print = getattr(object, "__ndr_print__", None) if ndr_print is None: raise TypeError("%r is not a NDR object" % object) return ndr_print() def ndr_deepcopy(object): """Create a deep copy of a NDR object, using pack/unpack :param object: Object to copy :return: The object copy """ ndr_pack = getattr(object, "__ndr_pack__", None) if ndr_pack is None: raise TypeError("%r is not a NDR object" % object) data = ndr_pack() cls = type(object) copy = cls() ndr_unpack = getattr(copy, "__ndr_unpack__", None) if ndr_unpack is None: raise TypeError("%r is not a NDR object" % copy) ndr_unpack(data, allow_remaining=False) return copy def ndr_pack_in(object, bigendian=False, ndr64=False): """Pack the input of an NDR function object. :param object: Object to pack :param bigendian: use LIBNDR_FLAG_BIGENDIAN (default=False) :param ndr64: use LIBNDR_FLAG_NDR64 (default=False) :return: String object with marshalled object. """ ndr_pack_in_fn = getattr(object, "__ndr_pack_in__", None) if ndr_pack_in_fn is None: raise TypeError("%r is not a NDR function object" % object) return ndr_pack_in_fn(bigendian=bigendian, ndr64=ndr64) def ndr_unpack_in(object, data, bigendian=False, ndr64=False, allow_remaining=False): """Unpack the input of an NDR function object. :param cls: Class of the object to unpack :param data: Buffer to unpack :param bigendian: use LIBNDR_FLAG_BIGENDIAN (default=False) :param ndr64: use LIBNDR_FLAG_NDR64 (default=False) :param allow_remaining: allows remaining data at the end (default=False) :return: Unpacked object """ ndr_unpack_in_fn = getattr(object, "__ndr_unpack_in__", None) if ndr_unpack_in_fn is None: raise TypeError("%r is not a NDR function object" % object) ndr_unpack_in_fn(data, bigendian=bigendian, ndr64=ndr64, allow_remaining=allow_remaining) return object def ndr_print_in(object): ndr_print_in_fn = getattr(object, "__ndr_print_in__", None) if ndr_print_in_fn is None: raise TypeError("%r is not a NDR function object" % object) return ndr_print_in_fn() def ndr_pack_out(object, bigendian=False, ndr64=False): """Pack the output of an NDR function object. :param object: Object to pack :param bigendian: use LIBNDR_FLAG_BIGENDIAN (default=False) :param ndr64: use LIBNDR_FLAG_NDR64 (default=False) :return: String object with marshalled object. """ ndr_pack_out_fn = getattr(object, "__ndr_pack_out__", None) if ndr_pack_out_fn is None: raise TypeError("%r is not a NDR function object" % object) return ndr_pack_out_fn(bigendian=bigendian, ndr64=ndr64) def ndr_unpack_out(object, data, bigendian=False, ndr64=False, allow_remaining=False): """Unpack the output of an NDR function object. :param cls: Class of the object to unpack :param data: Buffer to unpack :param bigendian: use LIBNDR_FLAG_BIGENDIAN (default=False) :param ndr64: use LIBNDR_FLAG_NDR64 (default=False) :param allow_remaining: allows remaining data at the end (default=False) :return: Unpacked object """ ndr_unpack_out_fn = getattr(object, "__ndr_unpack_out__", None) if ndr_unpack_out_fn is None: raise TypeError("%r is not a NDR function object" % object) ndr_unpack_out_fn(data, bigendian=bigendian, ndr64=ndr64, allow_remaining=allow_remaining) return object def ndr_print_out(object): ndr_print_out_fn = getattr(object, "__ndr_print_out__", None) if ndr_print_out_fn is None: raise TypeError("%r is not a NDR function object" % object) return ndr_print_out_fn()