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Code Issues Projects Releases Wiki Activity

Further restrict whitelist by package name and fix #369

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Marvin W 2017-05-20 00:24:23 +02:00
parent ee8bc5a9f2
commit da922189e2
No known key found for this signature in database
GPG Key ID: 072E9235DB996F2A
1 changed files with 31 additions and 15 deletions
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46
play-services-core/src/main/java/org/microg/gms/common/PackageUtils.java
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@ -1,5 +1,5 @@
/* /*
* Copyright 2013-2015 microG Project Team * Copyright (C) 2013-2017 microG Project Team
* *
* Licensed under the Apache License, Version 2.0 (the "License"); * Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. * you may not use this file except in compliance with the License.
@ -22,12 +22,15 @@ import android.content.pm.PackageInfo;
import android.content.pm.PackageManager; import android.content.pm.PackageManager;
import android.content.pm.Signature; import android.content.pm.Signature;
import android.os.Binder; import android.os.Binder;
import android.support.annotation.Nullable;
import com.google.android.gms.Manifest; import com.google.android.gms.Manifest;
import java.security.MessageDigest; import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException; import java.security.NoSuchAlgorithmException;
import java.util.Arrays; import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import static android.os.Build.VERSION.SDK_INT; import static android.os.Build.VERSION.SDK_INT;
import static org.microg.gms.common.Constants.GMS_PACKAGE_NAME; import static org.microg.gms.common.Constants.GMS_PACKAGE_NAME;
@ -35,19 +38,31 @@ import static org.microg.gms.common.Constants.GMS_PACKAGE_SIGNATURE_SHA1;
public class PackageUtils { public class PackageUtils {
private static final String[] KNOWN_GOOGLE_SIGNATURES = { private static final String GOOGLE_PLATFORM_KEY = GMS_PACKAGE_SIGNATURE_SHA1;
GMS_PACKAGE_SIGNATURE_SHA1 /* Google platform key */, private static final String GOOGLE_APP_KEY = "24bb24c05e47e0aefa68a58a766179d9b613a600";
"58e1c4133f7441ec3d2c270270a14802da47ba0e" /* Android Wear */, private static final String GOOGLE_LEGACY_KEY = "58e1c4133f7441ec3d2c270270a14802da47ba0e"; // Seems to be no longer used.
"46f6c8987311e131f4f558d8e0ae145bebab6da3" /* Google Classroom */, private static final String[] GOOGLE_PRIMARY_KEYS = {GOOGLE_PLATFORM_KEY, GOOGLE_APP_KEY};
"24bb24c05e47e0aefa68a58a766179d9b613a600" /* Google Fit/Glass */,
"aa87ce1260c008d801197bb4ecea4ab8929da246" /* Google Inbox */,
"01b844184e360686aa98b48eb16e05c76d4a72ad" /* Project Fi */,
"35b438fe1bc69d975dc8702dc16ab69ebf65f26f" /* Waze */,
"0cbe08032217d45e61c0bc72f294395ee9ecb5d5" /* Google Trips */,
"188c5ca3863fa121216157a5baa80755ceda70ab" /* Google Cardboard Camera */};
public static boolean isGoogleSignedPackages(Context context, String packageName) { private static final Map<String, String> KNOWN_GOOGLE_PACKAGES;
return Arrays.asList(KNOWN_GOOGLE_SIGNATURES).contains(firstSignatureDigest(context, packageName));
static {
KNOWN_GOOGLE_PACKAGES = new HashMap<>();
KNOWN_GOOGLE_PACKAGES.put("com.google.android.apps.classroom", "46f6c8987311e131f4f558d8e0ae145bebab6da3");
KNOWN_GOOGLE_PACKAGES.put("com.google.android.apps.inbox", "aa87ce1260c008d801197bb4ecea4ab8929da246");
KNOWN_GOOGLE_PACKAGES.put("com.google.android.apps.playconsole", "d6c35e55b481aefddd74152ca7254332739a81d6");
KNOWN_GOOGLE_PACKAGES.put("com.google.android.apps.travel.onthego", "0cbe08032217d45e61c0bc72f294395ee9ecb5d5");
KNOWN_GOOGLE_PACKAGES.put("com.google.android.apps.tycho", "01b844184e360686aa98b48eb16e05c76d4a72ad");
KNOWN_GOOGLE_PACKAGES.put("com.google.android.wearable.app", "a197f9212f2fed64f0ff9c2a4edf24b9c8801c8c");
KNOWN_GOOGLE_PACKAGES.put("com.google.vr.cyclops", "188c5ca3863fa121216157a5baa80755ceda70ab");
KNOWN_GOOGLE_PACKAGES.put("com.waze", "35b438fe1bc69d975dc8702dc16ab69ebf65f26f");
}
public static boolean isGooglePackage(Context context, String packageName) {
String signatureDigest = firstSignatureDigest(context, packageName);
if (signatureDigest == null) return false;
if (Arrays.asList(GOOGLE_PRIMARY_KEYS).contains(signatureDigest)) return true;
if (!KNOWN_GOOGLE_PACKAGES.containsKey(packageName)) return false;
return KNOWN_GOOGLE_PACKAGES.get(packageName).equals(signatureDigest);
} }
public static void assertExtendedAccess(Context context) { public static void assertExtendedAccess(Context context) {
@ -59,7 +74,7 @@ public class PackageUtils {
String[] packagesForUid = context.getPackageManager().getPackagesForUid(Binder.getCallingUid()); String[] packagesForUid = context.getPackageManager().getPackagesForUid(Binder.getCallingUid());
if (packagesForUid != null && packagesForUid.length != 0) { if (packagesForUid != null && packagesForUid.length != 0) {
for (String packageName : packagesForUid) { for (String packageName : packagesForUid) {
if (isGoogleSignedPackages(context, packageName) || GMS_PACKAGE_NAME.equals(packageName)) if (isGooglePackage(context, packageName) || GMS_PACKAGE_NAME.equals(packageName))
return true; return true;
} }
} }
@ -80,13 +95,14 @@ public class PackageUtils {
checkPackageUid(context, packageName, callingUid); checkPackageUid(context, packageName, callingUid);
} }
@Nullable
public static String firstSignatureDigest(Context context, String packageName) { public static String firstSignatureDigest(Context context, String packageName) {
PackageManager packageManager = context.getPackageManager(); PackageManager packageManager = context.getPackageManager();
final PackageInfo info; final PackageInfo info;
try { try {
info = packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES); info = packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
} catch (PackageManager.NameNotFoundException e) { } catch (PackageManager.NameNotFoundException e) {
throw new RuntimeException(e); return null;
} }
if (info != null && info.signatures != null && info.signatures.length > 0) { if (info != null && info.signatures != null && info.signatures.length > 0) {
for (Signature sig : info.signatures) { for (Signature sig : info.signatures) {