FC (Fay) Stegerman obfusk

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hacking ⇒ ¬sleeping 😸

CS/InfoSec, FP, Software Freedom, Privacy, Math, 日本語 » she/her, they/them

obfusk / example.sh

Created May 28, 2024 20:05

perl command to decrement numbers in a file

perl -pi -e 's/\b(\d+)\b/$1 - 1/e' file-with-numbers

obfusk / apk-manifest-info.py

Last active May 27, 2024 21:31

	#!/usr/bin/python3
	import dataclasses
	import json
	import sys

	import repro_apk.binres as binres

	data = {}
	for apkfile in sys.argv[1:]:
	try:

obfusk / apksig-uses-sdk.groovy

Created May 20, 2024 21:20

	import com.android.apksig.ApkSigner
	import com.android.apksig.apk.ApkUtils
	import com.android.apksig.internal.apk.v1.V1SchemeVerifier
	import com.android.apksig.util.DataSource
	import com.android.apksig.util.DataSources

	def f = new RandomAccessFile(args[0], "r")
	def apk = DataSources.asDataSource(f, 0, f.length())
	def zipSections = ApkUtils.findZipSections(apk)
	def cdRecords = V1SchemeVerifier.parseZipCentralDirectory(apk, zipSections)

obfusk / elf-build-id.py

Last active April 29, 2024 01:52

Get ELF build-id w/ pyelftools

	#!/usr/bin/python3
	# encoding: utf-8
	# SPDX-FileCopyrightText: 2024 FC (Fay) Stegerman <flx@obfusk.net>
	# SPDX-License-Identifier: GPL-3.0-or-later

	from elftools.elf.elffile import ELFFile # type: ignore[import-untyped]
	from elftools.elf.sections import NoteSection # type: ignore[import-untyped]


	class Error(Exception):

obfusk / zipdup.py

Last active April 11, 2024 19:19

create a ZIP file with two CD entries pointing to the same file

	#!/usr/bin/python3
	import sys
	import zipfile


	# Usage: zipdup.py ZIPFILE ENTRY_NAME ENTRY_DATA
	zfile, zentry, data = sys.argv[1:]
	with zipfile.ZipFile(zfile, "w") as zf:
	info = zipfile.ZipInfo(filename=zentry)
	zf.writestr(info, data)

obfusk / detect-apk.py

Last active April 11, 2024 17:04

Detect APK files

	#!/usr/bin/python3
	# encoding: utf-8
	# SPDX-FileCopyrightText: 2024 FC (Fay) Stegerman <flx@obfusk.net>
	# SPDX-License-Identifier: AGPL-3.0-or-later

	import fnmatch
	import os
	import struct
	import sys

obfusk / Cert.java

Last active April 17, 2024 00:03

verify APK and get SHA-256 of first cert

	import java.io.File;
	import java.io.IOException;
	import java.security.NoSuchAlgorithmException;
	import java.security.cert.CertificateEncodingException;
	import java.security.cert.X509Certificate;
	import java.util.List;

	import com.android.apksig.ApkVerificationIssue;
	import com.android.apksig.ApkVerifier;
	import com.android.apksig.apk.ApkFormatException;

obfusk / mozzip.py

Last active March 29, 2024 16:43

	import zipfile


	def test(filename):
	_orig_EndRecData = zipfile._EndRecData
	eocd_offset = None

	def _EndRecData(fh):
	endrec = _orig_EndRecData(fh)
	if endrec:

obfusk / fix-pg-map-id.py

Last active March 21, 2024 04:11

fix pg-map-id

	#!/usr/bin/python3
	# encoding: utf-8
	# SPDX-FileCopyrightText: 2024 FC (Fay) Stegerman <flx@obfusk.net>
	# SPDX-License-Identifier: GPL-3.0-or-later

	import hashlib
	import os
	import re
	import struct
	import zipfile

obfusk / delete-tag.py

Last active March 9, 2024 15:32

rbtlog: merge logs

-#!/usr/bin/python3
-# encoding: utf-8
-# SPDX-FileCopyrightText: 2024 FC (Fay) Stegerman <flx@obfusk.net>
-# SPDX-License-Identifier: AGPL-3.0-or-later
-import argparse
-import json
-import os
-from typing import Any, Dict