# maoabc/nmmp

dex-vm used to protect the android classes.dex file

Repository: https://github.com/maoabc/nmmp
Canonical: https://ross.abutalabs.com/products/nmmp
Language: C
License Family: other
Topics: android, ndk
Last push: 2025-08-22T18:55:49+00:00

## Health v2 (maintenance only)
Score: 40/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 38, release rhythm 8, longevity 100
- inputs: {"age_days": 1930, "days_push": 376, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1202, forks 379 (observed 2026-08-28T04:03:58.351239+00:00)

## What it is
nmmp is an APK/AAB/AAR hardening tool that converts Dalvik bytecode from classes.dex into native C code executed by a custom dex virtual machine, making decompilation significantly harder. It consists of nmm-protect (a Java tool that transforms dex data into C structs with randomized opcodes and generates an NDK project) and nmmvm (the C-based dex-vm interpreter).

## Use cases
- protect android apk from decompilation
- convert dex bytecode to native code
- harden android app against reverse engineering
- obfuscate classes.dex with a custom virtual machine
- protect aab and aar artifacts
- randomize dalvik opcodes to break decompilers

## When to choose
- you need to protect selected Java/Kotlin methods in an Android app from static analysis
- you want an open-source dex-to-native protection without commercial packers
- you need to harden apk, aab, or aar builds via a command-line pipeline

## When to avoid
- you only need name obfuscation - ProGuard/R8 is simpler
- you cannot ship native libraries or use the Android NDK
- you require a certified commercial-grade anti-tampering solution with support

## Facets
- artifact type: library
- maturity: active
- function: security, compiler, interpreter, reverse-engineering
- domain: security, mobile-development, android-tools, reverse-engineering
- platform: cpp, c, cli, windows
- tags: dex-vm, apk-hardening, obfuscation, dex2c, ndk, anti-decompilation, dalvik-bytecode, android, linux, macos

## Member repositories
- maoabc/nmmp (main) score 40

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:58.351239+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:20:36.617647+00:00, confidence not recorded.
  - readme: https://github.com/maoabc/nmmp (fetched 2026-08-28T04:03:58.351239+00:00, sha 142f6f38028d)
- Data as of 2026-08-30T08:39:29.467469+00:00.