From 4c9428a135c0b5a072c3ab3df8403e9a2cb438aa Mon Sep 17 00:00:00 2001 From: markchien Date: Wed, 3 Jun 2020 12:27:37 +0800 Subject: [PATCH] Protect invalid entitlement app configuration There is a protection in Settings that Settings would gray out if tethering requires entitlement check but the entitlement app is invalid. Tethering resource is moved from framework to tethering module, so Settings can not fetch entitlement app name anymore. In this change, tethering module would check whether entitltement app package name is exsited if entitlement check is needed. Tethering would be not supported (Settings tethering option would be hidded) if entitlement app is not installed. After moving the protection into tethering module, TetherUtil#isProvisioningNeeded is no longer needed. Because The only use case is Settings wants to gray out tethering setting when entitltement check is needed but entitlement app is invalid. Bug: 146918263 Test: atest TetheringCoverageTests Change-Id: I9a5ff5dbc1db3f3be7fcd7146862a16b373507e6 Merged-In: I9a5ff5dbc1db3f3be7fcd7146862a16b373507e6 --- .../networkstack/tethering/Tethering.java | 28 ++++++++++++++--- .../tethering/TetheringDependencies.java | 9 ++++++ .../networkstack/tethering/TetheringTest.java | 30 +++++++++++++++++++ 3 files changed, 63 insertions(+), 4 deletions(-) diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java index 71ab176764..8d720e7539 100644 --- a/Tethering/src/com/android/networkstack/tethering/Tethering.java +++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java @@ -18,6 +18,7 @@ package com.android.networkstack.tethering; import static android.Manifest.permission.NETWORK_SETTINGS; import static android.Manifest.permission.NETWORK_STACK; +import static android.content.pm.PackageManager.GET_ACTIVITIES; import static android.content.pm.PackageManager.PERMISSION_GRANTED; import static android.hardware.usb.UsbManager.USB_CONFIGURED; import static android.hardware.usb.UsbManager.USB_CONNECTED; @@ -71,6 +72,7 @@ import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; +import android.content.pm.PackageManager; import android.hardware.usb.UsbManager; import android.net.ConnectivityManager; import android.net.EthernetManager; @@ -110,7 +112,6 @@ import android.os.RemoteCallbackList; import android.os.RemoteException; import android.os.ResultReceiver; import android.os.ServiceSpecificException; -import android.os.SystemProperties; import android.os.UserHandle; import android.os.UserManager; import android.provider.Settings; @@ -811,11 +812,30 @@ public class Tethering { } } + private boolean isProvisioningNeededButUnavailable() { + return isTetherProvisioningRequired() && !doesEntitlementPackageExist(); + } + boolean isTetherProvisioningRequired() { final TetheringConfiguration cfg = mConfig; return mEntitlementMgr.isTetherProvisioningRequired(cfg); } + private boolean doesEntitlementPackageExist() { + // provisioningApp must contain package and class name. + if (mConfig.provisioningApp.length != 2) { + return false; + } + + final PackageManager pm = mContext.getPackageManager(); + try { + pm.getPackageInfo(mConfig.provisioningApp[0], GET_ACTIVITIES); + } catch (PackageManager.NameNotFoundException e) { + return false; + } + return true; + } + // TODO: Figure out how to update for local hotspot mode interfaces. private void sendTetherStateChangedBroadcast() { if (!isTetheringSupported()) return; @@ -2175,14 +2195,14 @@ public class Tethering { // gservices could set the secure setting to 1 though to enable it on a build where it // had previously been turned off. boolean isTetheringSupported() { - final int defaultVal = - SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1; + final int defaultVal = mDeps.isTetheringDenied() ? 0 : 1; final boolean tetherSupported = Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.TETHER_SUPPORTED, defaultVal) != 0; final boolean tetherEnabledInSettings = tetherSupported && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); - return tetherEnabledInSettings && hasTetherableConfiguration(); + return tetherEnabledInSettings && hasTetherableConfiguration() + && !isProvisioningNeededButUnavailable(); } void dump(@NonNull FileDescriptor fd, @NonNull PrintWriter writer, @Nullable String[] args) { diff --git a/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java b/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java index 8f4b964323..131a5fbf2a 100644 --- a/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java +++ b/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java @@ -26,6 +26,8 @@ import android.net.util.SharedLog; import android.os.Handler; import android.os.IBinder; import android.os.Looper; +import android.os.SystemProperties; +import android.text.TextUtils; import androidx.annotation.NonNull; @@ -147,4 +149,11 @@ public abstract class TetheringDependencies { * Get a reference to BluetoothAdapter to be used by tethering. */ public abstract BluetoothAdapter getBluetoothAdapter(); + + /** + * Get SystemProperties which indicate whether tethering is denied. + */ + public boolean isTetheringDenied() { + return TextUtils.equals(SystemProperties.get("ro.tether.denied"), "true"); + } } diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java index 2b2dfae5c9..d37aad26d1 100644 --- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java +++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java @@ -16,6 +16,7 @@ package com.android.networkstack.tethering; +import static android.content.pm.PackageManager.GET_ACTIVITIES; import static android.hardware.usb.UsbManager.USB_CONFIGURED; import static android.hardware.usb.UsbManager.USB_CONNECTED; import static android.hardware.usb.UsbManager.USB_FUNCTION_NCM; @@ -81,6 +82,7 @@ import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.ApplicationInfo; +import android.content.pm.PackageManager; import android.content.res.Resources; import android.hardware.usb.UsbManager; import android.net.ConnectivityManager; @@ -204,6 +206,7 @@ public class TetheringTest { @Mock private EthernetManager mEm; @Mock private TetheringNotificationUpdater mNotificationUpdater; @Mock private BpfCoordinator mBpfCoordinator; + @Mock private PackageManager mPackageManager; private final MockIpServerDependencies mIpServerDependencies = spy(new MockIpServerDependencies()); @@ -263,6 +266,11 @@ public class TetheringTest { return super.getSystemService(name); } + @Override + public PackageManager getPackageManager() { + return mPackageManager; + } + @Override public String getSystemServiceName(Class serviceClass) { if (TelephonyManager.class.equals(serviceClass)) return Context.TELEPHONY_SERVICE; @@ -425,6 +433,11 @@ public class TetheringTest { public TetheringNotificationUpdater getNotificationUpdater(Context ctx, Looper looper) { return mNotificationUpdater; } + + @Override + public boolean isTetheringDenied() { + return false; + } } private static UpstreamNetworkState buildMobileUpstreamState(boolean withIPv4, @@ -1951,6 +1964,23 @@ public class TetheringTest { assertEquals(TETHER_ERROR_IFACE_CFG_ERROR, mTethering.getLastTetherError(TEST_ETH_IFNAME)); } + @Test + public void testProvisioningNeededButUnavailable() throws Exception { + assertTrue(mTethering.isTetheringSupported()); + verify(mPackageManager, never()).getPackageInfo(PROVISIONING_APP_NAME[0], GET_ACTIVITIES); + + setupForRequiredProvisioning(); + assertTrue(mTethering.isTetheringSupported()); + verify(mPackageManager).getPackageInfo(PROVISIONING_APP_NAME[0], GET_ACTIVITIES); + reset(mPackageManager); + + doThrow(PackageManager.NameNotFoundException.class).when(mPackageManager).getPackageInfo( + PROVISIONING_APP_NAME[0], GET_ACTIVITIES); + setupForRequiredProvisioning(); + assertFalse(mTethering.isTetheringSupported()); + verify(mPackageManager).getPackageInfo(PROVISIONING_APP_NAME[0], GET_ACTIVITIES); + } + // TODO: Test that a request for hotspot mode doesn't interfere with an // already operating tethering mode interface. }