Support for DEX template? #14

Disane · 2015-08-27T08:31:34Z

Hi,

I've noticed that when trying to use the DEX template, PFP yields a no attribute error on an 'Array'.
I used the following template: http://www.sweetscape.com/010editor/templates/files/DEXTemplate.bt

Is there a possibility for you to add DEX binary template support to PFP?

In [2]: dom = pfp.parse(data_file='/mnt/hgfs//classes.dex', template_file='/mnt/hgfs//DEXTemplate.bt')---------------------------------------------------------------------------
PfpError Traceback (most recent call last)
in ()
----> 1 dom = pfp.parse(data_file='/mnt/hgfs//classes.dex', template_file='/mnt/hgfs//DEXTemplate.bt')

/usr/local/lib/python2.7/dist-packages/pfp/init.pyc in parse(data, template, data_file, template_file, interp, debug, predefines, int3, cpp_path, cpp_args, keep_successful)
62 data = BitwrappedStream(data)
63
---> 64 dom = interp.parse(data, template, predefines=predefines, orig_filename=orig_filename, keep_successful=keep_successful)
65
66 # close the data stream if a data_file was specified

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in parse(self, stream, template, predefines, orig_filename, keep_successful)
668 self._dlog("parsed template into ast")
669
--> 670 res = self._run(keep_successful)
671 return res
672

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _run(self, keep_successfull)
872 errors.PfpError,
873 errors.PfpError(exc_obj.class.name + ": " + exc_obj.args[0] + more_info if len(exc_obj.args) > 0 else more_info),
--> 874 traceback
875 )
876

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _run(self, keep_successfull)
851 # it is important to pass the stream in as the stream
852 # may change (e.g. compressed data)
--> 853 res = self._handle_node(self._ast, None, None, self._stream)
854 except errors.InterpReturn as e:
855 # TODO handle exit/return codes (e.g. return -1)

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_node(self, node, scope, ctxt, stream)
944 raise errors.UnsupportedASTNode(node.coord, node.class.name)
945
--> 946 res = self._node_switch[node.class](node, scope, ctxt, stream)
947
948 self._log.dec()

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_file_ast(self, node, scope, ctxt, stream)
967
968 for child in node.children():
--> 969 self._handle_node(child, scope, ctxt, stream)
970
971 ctxt._pfp__process_fields_metadata()

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_node(self, node, scope, ctxt, stream)
944 raise errors.UnsupportedASTNode(node.coord, node.class.name)
945
--> 946 res = self._node_switch[node.class](node, scope, ctxt, stream)
947
948 self._log.dec()

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_decl(self, node, scope, ctxt, stream)
1152
1153 field_res._pfp__interp = self
-> 1154 field._pfp__init(stream)
1155 added_child = True
1156 else:

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _pfp__init(self, stream)
48 )
49 param_list = params.instantiate(scope, struct_args, self._pfp__interp)
---> 50 super(self.class, self).pfp__init(stream)
51
52 new_class = type(struct_cls.name + "", (struct_cls,), {

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _pfp__init(self, stream)
78 decls,
79 ctxt=self,
---> 80 stream=stream
81 )
82

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_node(self, node, scope, ctxt, stream)
944 raise errors.UnsupportedASTNode(node.coord, node.class.name)
945
--> 946 res = self._node_switch[node.class](node, scope, ctxt, stream)
947
948 self._log.dec()

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_struct_decls(self, node, scope, ctxt, stream)
1429 for decl in node.decls:
1430 # new context! (struct)
-> 1431 self._handle_node(decl, scope, ctxt, stream)
1432
1433 ctxt._pfp__process_fields_metadata()

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_node(self, node, scope, ctxt, stream)
944 raise errors.UnsupportedASTNode(node.coord, node.class.name)
945
--> 946 res = self._node_switch[node.class](node, scope, ctxt, stream)
947
948 self._log.dec()

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in _handle_decl(self, node, scope, ctxt, stream)
1155 added_child = True
1156 else:
-> 1157 field = field(stream, metadata_processor=metadata_processor)
1158
1159 if not added_child:

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in init(self, stream, metadata_processor)
102 width = fields.PYVAL(item_count)
103 def init(self, stream=None, metadata_processor=None):
--> 104 fields.Array.init(self, self.width, self.field_cls, stream, metadata_processor=metadata_processor)
105 new_class = type("Array_{}_{}".format(item_cls.name, width), (fields.Array,), {
106 "init" : init,

/usr/local/lib/python2.7/dist-packages/pfp/fields.pyc in init(self, width, field_cls, stream, metadata_processor)
1408
1409 if stream is not None:
-> 1410 self._pfp__parse(stream, save_offset=True)
1411 else:
1412 if width is not None:

/usr/local/lib/python2.7/dist-packages/pfp/fields.pyc in _pfp__parse(self, stream, save_offset)
1523 self.items = []
1524 for x in six.moves.range(PYVAL(self.width)):
-> 1525 field = self.field_cls(stream)
1526 field._pfp__name = "{}[{}]".format(
1527 self._pfp__name,

/usr/local/lib/python2.7/dist-packages/pfp/interp.pyc in init(self, stream, metadata_processor, do_init)
72
73 if do_init:
---> 74 self._pfp__init(stream)
75
76 def _pfp__init(self, stream):