Merge "Detect shareduid between different partitions"

#

# Copyright (C) 2019 The Android Open Source Project

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#      http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

shareduid_violation_modules_filename := $(PRODUCT_OUT)/shareduid_violation_modules.json

find_shareduid_script := $(BUILD_SYSTEM)/tasks/find-shareduid-violation.py

$(shareduid_violation_modules_filename): $(INSTALLED_SYSTEMIMAGE_TARGET) \

    $(INSTALLED_RAMDISK_TARGET) \

    $(INSTALLED_BOOTIMAGE_TARGET) \

    $(INSTALLED_USERDATAIMAGE_TARGET) \

    $(INSTALLED_VENDORIMAGE_TARGET) \

    $(INSTALLED_PRODUCTIMAGE_TARGET) \

    $(INSTALLED_PRODUCT_SERVICESIMAGE_TARGET)

$(shareduid_violation_modules_filename): $(find_shareduid_script)

$(shareduid_violation_modules_filename): $(AAPT2)

	$(find_shareduid_script) $(PRODUCT_OUT) $(AAPT2) > $@

$(call dist-for-goals,droidcore,$(shareduid_violation_modules_filename))

#!/usr/bin/env python3

#

# Copyright (C) 2019 The Android Open Source Project

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#      http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

import os

import subprocess

from glob import glob

from collections import defaultdict

import sys

import json

if len(sys.argv) < 3:

    product_out = os.environ["PRODUCT_OUT"]

    aapt = "aapt2"

else:

    product_out = sys.argv[1]

    aapt = sys.argv[2]

def make_aapt_cmd(file):

    cmds = [aapt + ' dump ' + file + ' --file AndroidManifest.xml',

            aapt + ' dump xmltree ' + file + ' --file AndroidManifest.xml']

    return " || ".join(cmds)

def extract_shared_uid(file):

    manifest = subprocess.check_output(make_aapt_cmd(file), shell=True).decode().split('\n')

    for l in manifest:

        if "sharedUserId" in l:

            return l.split('"')[-2]

    return None

partitions = ["system", "vendor", "product"]

shareduid_app_dict = defaultdict(list)

for p in partitions:

    for f in glob(os.path.join(product_out, p, "*", "*", "*.apk")):

        apk_file = os.path.basename(f)

        shared_uid = extract_shared_uid(f)

        if shared_uid is None:

            continue

        shareduid_app_dict[shared_uid].append((p, apk_file))

output = defaultdict(lambda: defaultdict(list))

for uid, app_infos in shareduid_app_dict.items():

    partitions = {p for p, _ in app_infos}

    if len(partitions) > 1:

        for part in partitions:

            output[uid][part].extend([a for p, a in app_infos if p == part])

print(json.dumps(output, indent=2, sort_keys=True))