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Commit ef26afdc authored by Jeongik Cha's avatar Jeongik Cha
Browse files

Detect shareduid between different partitions 

Find shareduid usage between the partitions(system, vendor, product).

Here is sample output

{
  "android.uid.system": {
    "product": [
      "Settings.apk"
    ],
    "system": [
      "framework-res.apk",
      "FusedLocation.apk",
      "Telecom.apk",
      "InputDevices.apk",
      "SettingsProvider.apk",
      "WallpaperBackup.apk",
      "KeyChain.apk"
    ]
  }
}

Bug: 123664116
Test: m -j out/target/product/$(get_build_var TARGET_DEVICE)/shareduid_violation_modules.txt
Change-Id: If2a75bf66b369cd3fad1744d08b6bfbfc624979c
parent 664b72ab

core/tasks/find-shareduid-violation.mk

0 → 100644
+32 −0
Original line number Diff line number Diff line 
#

# 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))

core/tasks/find-shareduid-violation.py

0 → 100755
+66 −0
Original line number Diff line number Diff line 
#!/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))