O-MVLL Configuration

o-conf.py

"""
O-MVLL Configuration used to obfuscate:
https://github.com/optiv/android-ndk-crackme/blob/97932c868cde400747b49c61641c59d3f49c5145/app/src/main/cpp/native-lib.cpp
"""
import omvll
from functools import lru_cache

class Config(omvll.ObfuscationConfig):
    def __init__(self):
        super().__init__()

    def break_control_flow(self, mod: omvll.Module, func: omvll.Function):
        return func.demangled_name.startswith("Java_")

    def anti_hooking(self, mod: omvll.Module, func: omvll.Function):
        return func.demangled_name.startswith("Java_")

    def obfuscate_struct_access(self, mod: omvll.Module, func: omvll.Function, S: omvll.Struct):
        return "JNINativeInterface" in S.name

    def flatten_cfg(self, mod: omvll.Module, func: omvll.Function):
        return func.demangled_name.startswith("Java_")

    def obfuscate_string(self, mod, func, string: bytes):
        if func.demangled_name.startswith("Java_"):
            return omvll.StringEncOptStack(loopThreshold=100)
        return False

    def obfuscate_constants(self, mod: omvll.Module, func: omvll.Function):
        return func.demangled_name.startswith("Java_")


@lru_cache(maxsize=1)
def omvll_get_config() -> Config:
    return Config()