waterbili/auto_reverse/apk-acquire

APK Acquire — Phase 0 Intake helper

When to Trigger

The orchestrator (or the user) names an Android target by package name (or app name) but there is no APK on disk yet. Run this skill immediately, without asking the user — acquisition is meant to be fully automatic.

This skill was added after the DailyPay case exposed that Phase 0 had no defined "acquire" step (see that case's SKILL-GAPS note).

Acquisition order (the script tries these in turn)

1. device  → app already installed on a connected adb device
             adb shell pm path <pkg>  → adb pull base + every split.apk
             (closest to a real install; best when frida/mitm comes next)
2. local   → an .apk/.xapk you already have (pass --local PATH)
3. apkpure → download from APKPure direct link, XAPK first then single APK:
             https://d.apkpure.com/b/XAPK/<pkg>?version=latest
             returns a zip (PK\x03\x04); XAPK = base.apk + config.*.apk + manifest.json

After acquiring, the script verifies the base APK's real package name (via aapt if available) and can install it back to a device with --install (install-multiple for split APKs).

Standard usage (Claude runs this)

# auto route (device → local → apkpure), output into the workspace source dir
python skills/android/apk-acquire/scripts/acquire_apk.py com.DailyPay.DailyPay \
    --out workspace/<target>/00-source
 
# force a route / pin a version / install onto device / use a local file
python .../acquire_apk.py <pkg> --source apkpure --version latest
python .../acquire_apk.py <pkg> --source device            # pull installed app
python .../acquire_apk.py <pkg> --local C:\path\app.xapk    # use a file you have
python .../acquire_apk.py <pkg> --install                  # also install to device

The script prints a JSON summary (last line of stdout), e.g.:

{
  "package": "com.DailyPay.DailyPay",
  "source": "apkpure",
  "files": ["...xapk", ".../com.DailyPay.DailyPay.apk", ".../config.arm64_v8a.apk", ...],
  "base_apk": ".../com.DailyPay.DailyPay.apk",
  "verified": true,
  "detected_package": "com.DailyPay.DailyPay",
  "installed": null,
  "out_dir": "..."
}

Then hand base_apk (+ split list) to the next phase (jadx / apktool fingerprint).

Notes & gotchas

• Pure stdlib — no pip deps. Needs adb for the device/install routes (auto-located,

incl. the Windows SDK path); aapt is optional (only for package verification).

• XAPK = split APKs. For decompilation you mostly need base.apk; for installing

on a device you need all splits together (install-multiple). The script keeps both.

• Third-party mirror risk: APKPure repackages installers. The script enforces a

package_name == requested check; for high-assurance work also compare the signing certificate against a known-good source, and prefer the device pull route when the app can be installed from an official store first.

• Only a package id is needed. If you only know the app's display name, resolve the

package first (store search / web) — this skill is package-name-centric by design.

• Robust alternative: apkeep (Rust, multi-source: APKPure / Google Play / F-Droid)

is a good bundled:false upgrade if the curl/urllib direct link breaks on a future APKPure change.