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Add AppOps Checks for MANAGE_IPSEC_TUNNELS

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Adds support for a new AppOp to permit services to
use IpSec tunnel mode. The IpSecService now needs
a context so change the service mode to a cached
service rather than a static service.

Bug: 66955045
Test: runtest frameworks-net
Merged-In: I17a4a286225b432c3e15ea1587d946189931b4f4
Change-Id: I17a4a286225b432c3e15ea1587d946189931b4f4
(cherry picked from commit 65ef843176)
This commit is contained in:
Nathan Harold
2018-03-15 18:06:06 -07:00
parent b9df8b1fca
commit cac8775b2a
4 changed files with 76 additions and 31 deletions
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20
core/java/android/net/IIpSecService.aidl
View File

@@ -45,25 +45,31 @@ interface IIpSecService
in String localAddr,
in String remoteAddr,
in Network underlyingNetwork,
in IBinder binder);
in IBinder binder,
in String callingPackage);
void addAddressToTunnelInterface(
int tunnelResourceId,
in LinkAddress localAddr);
in LinkAddress localAddr,
in String callingPackage);
void removeAddressFromTunnelInterface(
int tunnelResourceId,
in LinkAddress localAddr);
in LinkAddress localAddr,
in String callingPackage);
void deleteTunnelInterface(int resourceId);
void deleteTunnelInterface(int resourceId, in String callingPackage);
IpSecTransformResponse createTransform(in IpSecConfig c, in IBinder binder);
IpSecTransformResponse createTransform(
in IpSecConfig c, in IBinder binder, in String callingPackage);
void deleteTransform(int transformId);
void applyTransportModeTransform(in ParcelFileDescriptor socket, int direction, int transformId);
void applyTransportModeTransform(
in ParcelFileDescriptor socket, int direction, int transformId);
void applyTunnelModeTransform(int tunnelResourceId, int direction, int transformResourceId);
void applyTunnelModeTransform(
int tunnelResourceId, int direction, int transformResourceId, in String callingPackage);
void removeTransportModeTransforms(in ParcelFileDescriptor socket);
}

25
core/java/android/net/IpSecManager.java
View File

@@ -140,6 +140,7 @@ public final class IpSecManager {
}
}
private final Context mContext;
private final IIpSecService mService;
/**
@@ -667,6 +668,7 @@ public final class IpSecManager {
*/
@SystemApi
public static final class IpSecTunnelInterface implements AutoCloseable {
private final String mOpPackageName;
private final IIpSecService mService;
private final InetAddress mRemoteAddress;
private final InetAddress mLocalAddress;
@@ -694,7 +696,8 @@ public final class IpSecManager {
@RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
public void addAddress(@NonNull LinkAddress address) throws IOException {
try {
mService.addAddressToTunnelInterface(mResourceId, address);
mService.addAddressToTunnelInterface(
mResourceId, address, mOpPackageName);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
@@ -712,16 +715,18 @@ public final class IpSecManager {
@RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
public void removeAddress(@NonNull LinkAddress address) throws IOException {
try {
mService.removeAddressFromTunnelInterface(mResourceId, address);
mService.removeAddressFromTunnelInterface(
mResourceId, address, mOpPackageName);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
private IpSecTunnelInterface(@NonNull IIpSecService service,
private IpSecTunnelInterface(@NonNull Context ctx, @NonNull IIpSecService service,
@NonNull InetAddress localAddress, @NonNull InetAddress remoteAddress,
@NonNull Network underlyingNetwork)
throws ResourceUnavailableException, IOException {
mOpPackageName = ctx.getOpPackageName();
mService = service;
mLocalAddress = localAddress;
mRemoteAddress = remoteAddress;
@@ -733,7 +738,8 @@ public final class IpSecManager {
localAddress.getHostAddress(),
remoteAddress.getHostAddress(),
underlyingNetwork,
new Binder());
new Binder(),
mOpPackageName);
switch (result.status) {
case Status.OK:
break;
@@ -762,7 +768,7 @@ public final class IpSecManager {
@Override
public void close() {
try {
mService.deleteTunnelInterface(mResourceId);
mService.deleteTunnelInterface(mResourceId, mOpPackageName);
mResourceId = INVALID_RESOURCE_ID;
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
@@ -807,7 +813,8 @@ public final class IpSecManager {
public IpSecTunnelInterface createIpSecTunnelInterface(@NonNull InetAddress localAddress,
@NonNull InetAddress remoteAddress, @NonNull Network underlyingNetwork)
throws ResourceUnavailableException, IOException {
return new IpSecTunnelInterface(mService, localAddress, remoteAddress, underlyingNetwork);
return new IpSecTunnelInterface(
mContext, mService, localAddress, remoteAddress, underlyingNetwork);
}
/**
@@ -833,7 +840,8 @@ public final class IpSecManager {
@PolicyDirection int direction, @NonNull IpSecTransform transform) throws IOException {
try {
mService.applyTunnelModeTransform(
tunnel.getResourceId(), direction, transform.getResourceId());
tunnel.getResourceId(), direction,
transform.getResourceId(), mContext.getOpPackageName());
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
@@ -845,7 +853,8 @@ public final class IpSecManager {
* @param context the application context for this manager
* @hide
*/
public IpSecManager(IIpSecService service) {
public IpSecManager(Context ctx, IIpSecService service) {
mContext = ctx;
mService = checkNotNull(service, "missing service");
}
}

3
core/java/android/net/IpSecTransform.java
View File

@@ -130,7 +130,8 @@ public final class IpSecTransform implements AutoCloseable {
synchronized (this) {
try {
IIpSecService svc = getIpSecService();
IpSecTransformResponse result = svc.createTransform(mConfig, new Binder());
IpSecTransformResponse result = svc.createTransform(
mConfig, new Binder(), mContext.getOpPackageName());
int status = result.status;
checkResultStatus(status);
mResourceId = result.resourceId;

59
services/core/java/com/android/server/IpSecService.java
View File

@@ -24,6 +24,8 @@ import static android.system.OsConstants.IPPROTO_UDP;
import static android.system.OsConstants.SOCK_DGRAM;
import static com.android.internal.util.Preconditions.checkNotNull;
import android.annotation.NonNull;
import android.app.AppOpsManager;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.IIpSecService;
@@ -42,6 +44,7 @@ import android.net.NetworkUtils;
import android.net.TrafficStats;
import android.net.util.NetdService;
import android.os.Binder;
import android.os.DeadSystemException;
import android.os.IBinder;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
@@ -973,6 +976,13 @@ public class IpSecService extends IIpSecService.Stub {
return service;
}
@NonNull
private AppOpsManager getAppOpsManager() {
AppOpsManager appOps = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);
if(appOps == null) throw new RuntimeException("System Server couldn't get AppOps");
return appOps;
}
/** @hide */
@VisibleForTesting
public IpSecService(Context context, IpSecServiceConfiguration config) {
@@ -1239,7 +1249,9 @@ public class IpSecService extends IIpSecService.Stub {
*/
@Override
public synchronized IpSecTunnelInterfaceResponse createTunnelInterface(
String localAddr, String remoteAddr, Network underlyingNetwork, IBinder binder) {
String localAddr, String remoteAddr, Network underlyingNetwork, IBinder binder,
String callingPackage) {
enforceTunnelPermissions(callingPackage);
checkNotNull(binder, "Null Binder passed to createTunnelInterface");
checkNotNull(underlyingNetwork, "No underlying network was specified");
checkInetAddress(localAddr);
@@ -1319,8 +1331,8 @@ public class IpSecService extends IIpSecService.Stub {
*/
@Override
public synchronized void addAddressToTunnelInterface(
int tunnelResourceId, LinkAddress localAddr) {
enforceNetworkStackPermission();
int tunnelResourceId, LinkAddress localAddr, String callingPackage) {
enforceTunnelPermissions(callingPackage);
UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
// Get tunnelInterface record; if no such interface is found, will throw
@@ -1351,10 +1363,10 @@ public class IpSecService extends IIpSecService.Stub {
*/
@Override
public synchronized void removeAddressFromTunnelInterface(
int tunnelResourceId, LinkAddress localAddr) {
enforceNetworkStackPermission();
UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
int tunnelResourceId, LinkAddress localAddr, String callingPackage) {
enforceTunnelPermissions(callingPackage);
UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
// Get tunnelInterface record; if no such interface is found, will throw
// IllegalArgumentException
TunnelInterfaceRecord tunnelInterfaceInfo =
@@ -1382,7 +1394,9 @@ public class IpSecService extends IIpSecService.Stub {
* server
*/
@Override
public synchronized void deleteTunnelInterface(int resourceId) throws RemoteException {
public synchronized void deleteTunnelInterface(
int resourceId, String callingPackage) throws RemoteException {
enforceTunnelPermissions(callingPackage);
UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
releaseResource(userRecord.mTunnelInterfaceRecords, resourceId);
}
@@ -1468,7 +1482,6 @@ public class IpSecService extends IIpSecService.Stub {
case IpSecTransform.MODE_TRANSPORT:
break;
case IpSecTransform.MODE_TUNNEL:
enforceNetworkStackPermission();
break;
default:
throw new IllegalArgumentException(
@@ -1476,9 +1489,20 @@ public class IpSecService extends IIpSecService.Stub {
}
}
private void enforceNetworkStackPermission() {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.NETWORK_STACK,
"IpSecService");
private void enforceTunnelPermissions(String callingPackage) {
checkNotNull(callingPackage, "Null calling package cannot create IpSec tunnels");
switch (getAppOpsManager().noteOp(
AppOpsManager.OP_MANAGE_IPSEC_TUNNELS,
Binder.getCallingUid(), callingPackage)) {
case AppOpsManager.MODE_DEFAULT:
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.MANAGE_IPSEC_TUNNELS, "IpSecService");
break;
case AppOpsManager.MODE_ALLOWED:
return;
default:
throw new SecurityException("Request to ignore AppOps for non-legacy API");
}
}
private void createOrUpdateTransform(
@@ -1534,8 +1558,12 @@ public class IpSecService extends IIpSecService.Stub {
* result in all of those sockets becoming unable to send or receive data.
*/
@Override
public synchronized IpSecTransformResponse createTransform(IpSecConfig c, IBinder binder)
throws RemoteException {
public synchronized IpSecTransformResponse createTransform(
IpSecConfig c, IBinder binder, String callingPackage) throws RemoteException {
checkNotNull(c);
if (c.getMode() == IpSecTransform.MODE_TUNNEL) {
enforceTunnelPermissions(callingPackage);
}
checkIpSecConfig(c);
checkNotNull(binder, "Null Binder passed to createTransform");
final int resourceId = mNextResourceId++;
@@ -1656,8 +1684,9 @@ public class IpSecService extends IIpSecService.Stub {
*/
@Override
public synchronized void applyTunnelModeTransform(
int tunnelResourceId, int direction, int transformResourceId) throws RemoteException {
enforceNetworkStackPermission();
int tunnelResourceId, int direction,
int transformResourceId, String callingPackage) throws RemoteException {
enforceTunnelPermissions(callingPackage);
checkDirection(direction);
UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());