android-inspector

android-inspector is a set of utilities to inspect binary Android application APK as well as Android firmwares. This is also a ScanCode.io pipeline plugin.

The available features are:

• Extract and map the files found in a binary Android application to the assumed corresponding source code.

Other information:

• License: Apache-2.0
• Copyright (c) nexB Inc., AboutCode.org and others.
• Homepage: https://github.com/aboutcode-org/android-inspector/

Requirements

• ScanCode.io https://github.com/nexB/scancode.io
• Ensure Java 11+ is in your path (using an OpenJDK installation)
• Install jadx 1.5.0 https://github.com/skylot/jadx (You will need to add jadx to your path or moved its bin and lib directories to your /usr directory.

See also the next section for detailed instructions.

Local installation and usage test

To install:

• Clone android-inspector locally side-by-side: git clone https://github.com/aboutcode-org/android-inspector
• Clone ScanCode.io locally side-by-side: git clone https://github.com/aboutcode-org/scancode.io
• Change to the scancode.io directory and run make dev then source bin/activate
  • Follow the full instructions at https://scancodeio.readthedocs.io/en/latest/installation.html#local-development-installation
• Install jadx minimally
  • Download https://github.com/skylot/jadx/releases/download/v1.5.0/jadx-1.5.0.zip in your scancode.io directory
  • Extract with unzip -qd jadx-1.5.0 jadx-1.5.0.zip
  • Add the extracted directory jadx-1.5.0/bin and jadx-1.5.0/lib to your path with export PATH=$PATH:`pwd`/jadx-1.5.0/bin/jadx:`pwd`/jadx-1.5.0/lib
• Run pip install --editable ../android-inspector
• Run ScanCode.io with ./manage.py runserver --insecure and open the URL in your browser. There is a new "android_d2d" pipeline available when creating a new project.

To use with example Android APKs and sources:

• Create a new project and name it "sample-apk-analysis"
• In the input section, add Download URLs for the source and binary of a public APK:

You can use this pair of source (aka. "from") and binaries (aka. "to"):

• https://github.com/ochadenas/cpudefense/archive/refs/tags/v1.42.zip#from
• https://f-droid.org/repo/de.chadenas.cpudefense_42.apk#to

Or you can use alternatively this other example pair:

• https://github.com/Acclorite/book-story/archive/refs/tags/v1.3.0.tar.gz#from
• https://github.com/Acclorite/book-story/releases/download/v1.3.0/book-story.apk#to

Then:

• Select "android_d2d" in the pipeline dropdown and click "create".
• Wait for the pipeline to complete, and check the created Relations as well as the missing "To" source files resulting from mapping the binaries back to sources.

At this stage we typically report missing many source files because these are not present in the source code reposirories. In particular:

• PurlDB matching would be enabled in a full ScanCode.io installation and could help match the Android toolchain and standard library if indexed.
• There is a significant number of standard library Java files that are part of the Android toolchain. This will be resolved with this issue #3

Development

• Install requirements and dependencies using make dev
• Then source venv/bin/activate

Testing:

• To run tests: pytest -vvs

Acknowledgements, Funding, Support and Sponsoring

This project is funded, supported and sponsored by:

• Generous support and contributions from users like you!
• the European Commission NGI programme
• the NLnet Foundation
• the Swiss State Secretariat for Education, Research and Innovation (SERI)
• Google, including the Google Summer of Code and the Google Seasons of Doc programmes
• Mercedes-Benz Group
• Microsoft and Microsoft Azure
• AboutCode ASBL
• nexB Inc.

This project was funded through the NGI0 Core Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101092990.

https://nlnet.nl/project/Back2source-next/