def obfuscate(self, obfuscation_info: Obfuscation):
self.logger.info('Running "{0}" obfuscator'.format(
self.__class__.__name__))
# Get user defined ignore package list.
self.ignore_package_names = obfuscation_info.get_ignore_package_names()
try:
sdk_class_declarations = self.get_sdk_class_names(
obfuscation_info.get_smali_files())
renamed_field_declarations: Set[str] = set()
# There is a field limit for dex files.
self.max_fields_to_add = (
obfuscation_info.get_remaining_fields_per_obfuscator())
self.added_fields = 0
if obfuscation_info.is_multidex():
for index, dex_smali_files in enumerate(
util.show_list_progress(
obfuscation_info.get_multidex_smali_files(),
interactive=obfuscation_info.interactive,
unit="dex",
description="Processing multidex",
)):
self.max_fields_to_add = (
obfuscation_info.get_remaining_fields_per_obfuscator()
[index])
self.added_fields = 0
renamed_field_declarations.update(
self.rename_field_declarations(
dex_smali_files, obfuscation_info.interactive))
else:
renamed_field_declarations = self.rename_field_declarations(
obfuscation_info.get_smali_files(),
obfuscation_info.interactive)
# When renaming field references it makes no difference if this is a
# multidex application, since at this point we are not introducing any new
# field.
self.rename_field_references(
renamed_field_declarations,
obfuscation_info.get_smali_files(),
sdk_class_declarations,
obfuscation_info.interactive,
)
except Exception as e:
self.logger.error(
'Error during execution of "{0}" obfuscator: {1}'.format(
self.__class__.__name__, e))
raise
finally:
obfuscation_info.used_obfuscators.append(self.__class__.__name__)
def obfuscate(self, obfuscation_info: Obfuscation):
self.logger.info('Running "{0}" obfuscator'.format(self.__class__.__name__))
try:
Xml.register_namespace(
"android", "http://schemas.android.com/apk/res/android"
)
xml_parser = Xml.XMLParser(encoding="utf-8")
manifest_tree = Xml.parse(
obfuscation_info.get_manifest_file(), parser=xml_parser
)
manifest_root = manifest_tree.getroot()
self.package_name = manifest_root.get("package")
if not self.package_name:
raise Exception(
"Unable to extract package name from application manifest"
)
# Get a mapping between class name and smali file path.
for smali_file in util.show_list_progress(
obfuscation_info.get_smali_files(),
interactive=obfuscation_info.interactive,
description="Class name to smali file mapping",
):
with open(smali_file, "r", encoding="utf-8") as current_file:
class_name = None
for line in current_file:
if not class_name:
# Every smali file contains a class.
class_match = util.class_pattern.match(line)
if class_match:
self.class_name_to_smali_file[
class_match.group("class_name")
] = smali_file
break
self.transform_package_name(manifest_root)
# Write the changes into the manifest file.
manifest_tree.write(obfuscation_info.get_manifest_file(), encoding="utf-8")
xml_files: Set[str] = set(
os.path.join(root, file_name)
for root, dir_names, file_names in os.walk(
obfuscation_info.get_resource_directory()
)
for file_name in file_names
if file_name.endswith(".xml")
and (
"layout" in root or "xml" in root
) # Only res/layout-*/ and res/xml-*/ folders.
)
xml_files.add(obfuscation_info.get_manifest_file())
# TODO: use the following code to rename only the classes declared in
# application's package.
# package_smali_files: Set[str] = set(
# smali_file
# for class_name, smali_file in self.class_name_to_smali_file.items()
# if class_name[1:].startswith(self.package_name.replace(".", "/"))
# )
#
# # Rename the classes declared in the application's package.
# class_rename_transformations = self.rename_class_declarations(
# list(package_smali_files), obfuscation_info.interactive
# )
# Get user defined ignore package list.
self.ignore_package_names = obfuscation_info.get_ignore_package_names()
# Rename all classes declared in smali files.
class_rename_transformations = self.rename_class_declarations(
obfuscation_info.get_smali_files(), obfuscation_info.interactive
)
# Update renamed classes through all the smali files.
self.rename_class_usages_in_smali(
obfuscation_info.get_smali_files(),
class_rename_transformations,
obfuscation_info.interactive,
)
# Update renamed classes through all the xml files.
self.rename_class_usages_in_xml(
list(xml_files),
class_rename_transformations,
obfuscation_info.interactive,
)
except Exception as e:
self.logger.error(
'Error during execution of "{0}" obfuscator: {1}'.format(
self.__class__.__name__, e
)
)
raise
finally:
obfuscation_info.used_obfuscators.append(self.__class__.__name__)