obfusk

python3 -c $'import sys\nfor line in sorted(sys.stdin, key=lambda x: [int(n) for n in x[1:].split("-")[0].split(".")]): print(line, end="")'

obfusk

import java.util.Currency
Currency.availableCurrencies.each {
  println "${it.getCurrencyCode()}=${it.getSymbol()}"
}

obfusk

#!/usr/bin/python3
# encoding: utf-8
# SPDX-FileCopyrightText: 2023 FC Stegerman <[email protected]>
# SPDX-License-Identifier: GPL-3.0-or-later

from typing import Iterable, Iterator, List, Tuple

INDENT_SPACE = {"    ", "│   ", "|   "}
INDENT_FINAL = {"└── ", "├── ", "`-- ", "|-- "}

obfusk

#!/usr/bin/python3
import sys
from androguard.core.bytecodes import apk
with open(sys.argv[1], "rb") as fh:
    data = fh.read()
apk.ARSCParser(data).stringpool_main.show()

obfusk

// See https://developer.android.com/studio/publish/app-signing#secure-shared-keystore
def keystorePropertiesFile = rootProject.file("keystore.properties")
def keystoreProperties
def signedReleases = keystorePropertiesFile.exists()

if (signedReleases) {
    println("Using ${keystorePropertiesFile} for release signingConfig...")
    keystoreProperties = new Properties()
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

obfusk

HOWTO: diff & fix APKs for Reproducible Builds

NB: assumes signed APK from upstream named upstream-release.apk, and unsigned APK from F-Droid CI named fdroiddata-ci.apk.

NB: also assumes a working directory in which it is okay to create temporary files & directories.

Links

obfusk

obfusk

[global]
break-system-packages = true
no-index = true
index-url = https://localhost/do-not-use-pypi

obfusk

Signatures made by older versions of AGP cannot be copied by apksigcopier because the signing method differs too much from that used by apksigner (and signflinger in newer versions).

It is unlikely that support for these signatures will be added.

ZIP entry ordering differences

The v1 (JAR) signature files are always added at the end of the ZIP file by apksigner and apksigcopier; these older versions add them in a different position and sometimes the order of the ZIP entries in the central directory doesn't match the order of the entries in the file.

v1 (JAR) signature file differences

obfusk

import java.util.zip.ZipInputStream

def zis = new ZipInputStream(new FileInputStream(args[0]))
def entryCounter = 0
while (temp = zis.getNextEntry()) {
    entryCounter++
    if (!temp.name && !temp.size) {
        println "Found virtual entry #${entryCounter}"
    }
}