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apkfrombundle.py

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import sys

from zipfile import ZipFile

def compareFiles(first, second):

while True:

firstBytes = first.read(4096)

secondBytes = second.read(4096)

if firstBytes != secondBytes:

return False

if firstBytes == b"" and secondBytes == b"":

break

return True

def remove_prefix(text, prefix):

if text.startswith(prefix):

return text[len(prefix):]

return text

def compareApkFromBundle(bundle, apk):

FILES_TO_IGNORE = ["resources.arsc", "stamp-cert-sha256"]

apkZip = ZipFile(apk, 'r')

bundleZip = ZipFile(bundle, 'r')

firstList = list(filter(lambda info: info.filename not in FILES_TO_IGNORE, apkZip.infolist()))

secondList = list(filter(lambda secondInfo: secondInfo.filename not in FILES_TO_IGNORE, bundleZip.infolist()))

for apkInfo in firstList:

if (apkInfo.filename.startswith("META-INF/")):

continue

if (apkInfo.filename.startswith("res/")):

continue

if (apkInfo.filename.startswith("AndroidManifest.xml")):

continue

found = False

for bundleInfo in secondList:

fileName = bundleInfo.filename

fileName = remove_prefix(fileName, "base/root/")

fileName = remove_prefix(fileName, "base/dex/")

fileName = remove_prefix(fileName, "base/manifest/")

fileName = remove_prefix(fileName, "base/")

if (fileName.startswith("BUNDLE-METADATA")):

fileName = "META-INF" + remove_prefix(fileName, "BUNDLE-METADATA/")

if fileName == apkInfo.filename:

found = True

firstFile = apkZip.open(apkInfo, 'r')

secondFile = bundleZip.open(bundleInfo, 'r')

if compareFiles(firstFile, secondFile) != True:

print("APK file %s does not match" % apkInfo.filename)

return False

break

if found == False:

print("file %s not found in APK" % apkInfo.filename)

return False

return True

if __name__ == '__main__':

if len(sys.argv) != 3:

print("Usage: apkfrombundle <pathToBundle> <pathToApk>")

sys.exit(1)

if sys.argv[1] == sys.argv[2] or compareApkFromBundle(sys.argv[1], sys.argv[2]) == True:

print("APK from bundle!")

else:

print("APK has difference!")