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Merge "Remove hidden preconditions, binder usage in Vpn"

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Treehugger Robot
2021-07-09 16:43:19 +00:00
committed by Gerrit Code Review
parent cfa6f14403 053df0e78c
commit 9ffdbe8b2a
1 changed files with 65 additions and 55 deletions
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120
services/core/java/com/android/server/connectivity/Vpn.java
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@@ -23,8 +23,7 @@ import static android.net.RouteInfo.RTN_UNREACHABLE;
import static android.net.VpnManager.NOTIFICATION_CHANNEL_VPN;
import static android.os.UserHandle.PER_USER_RANGE;
import static com.android.internal.util.Preconditions.checkArgument;
import static com.android.internal.util.Preconditions.checkNotNull;
import static java.util.Objects.requireNonNull;
import android.Manifest;
import android.annotation.NonNull;
@@ -1096,13 +1095,14 @@ public class Vpn {
return Process.myUid();
}
PackageManager pm = mContext.getPackageManager();
return Binder.withCleanCallingIdentity(() -> {
try {
return pm.getPackageUidAsUser(app, userId);
} catch (NameNotFoundException e) {
return -1;
}
});
final long token = Binder.clearCallingIdentity();
try {
return pm.getPackageUidAsUser(app, userId);
} catch (NameNotFoundException e) {
return -1;
} finally {
Binder.restoreCallingIdentity(token);
}
}
private boolean doesPackageTargetAtLeastQ(String packageName) {
@@ -1278,15 +1278,16 @@ public class Vpn {
// We are user controlled, not driven by NetworkRequest.
}
};
Binder.withCleanCallingIdentity(() -> {
try {
mNetworkAgent.register();
} catch (final Exception e) {
// If register() throws, don't keep an unregistered agent.
mNetworkAgent = null;
throw e;
}
});
final long token = Binder.clearCallingIdentity();
try {
mNetworkAgent.register();
} catch (final Exception e) {
// If register() throws, don't keep an unregistered agent.
mNetworkAgent = null;
throw e;
} finally {
Binder.restoreCallingIdentity(token);
}
mNetworkAgent.setUnderlyingNetworks((mConfig.underlyingNetworks != null)
? Arrays.asList(mConfig.underlyingNetworks) : null);
updateState(DetailedState.CONNECTED, "agentConnect");
@@ -2024,13 +2025,16 @@ public class Vpn {
}
private void enforceNotRestrictedUser() {
Binder.withCleanCallingIdentity(() -> {
final long token = Binder.clearCallingIdentity();
try {
final UserInfo user = mUserManager.getUserInfo(mUserId);
if (user.isRestricted()) {
throw new SecurityException("Restricted users cannot configure VPNs");
}
});
} finally {
Binder.restoreCallingIdentity(token);
}
}
/**
@@ -2823,8 +2827,10 @@ public class Vpn {
LegacyVpnRunner(VpnConfig config, String[] racoon, String[] mtpd, VpnProfile profile) {
super(TAG);
checkArgument(racoon != null || mtpd != null, "Arguments to racoon and mtpd "
+ "must not both be null");
if (racoon == null && mtpd == null) {
throw new IllegalArgumentException(
"Arguments to racoon and mtpd must not both be null");
}
mConfig = config;
mDaemons = new String[] {"racoon", "mtpd"};
// TODO: clear arguments from memory once launched
@@ -3149,8 +3155,8 @@ public class Vpn {
*/
public synchronized boolean provisionVpnProfile(
@NonNull String packageName, @NonNull VpnProfile profile) {
checkNotNull(packageName, "No package name provided");
checkNotNull(profile, "No profile provided");
requireNonNull(packageName, "No package name provided");
requireNonNull(profile, "No profile provided");
verifyCallingUidAndPackage(packageName);
enforceNotRestrictedUser();
@@ -3167,12 +3173,12 @@ public class Vpn {
}
// Permissions checked during startVpnProfile()
Binder.withCleanCallingIdentity(
() -> {
getVpnProfileStore().put(
getProfileNameForPackage(packageName),
encodedProfile);
});
final long token = Binder.clearCallingIdentity();
try {
getVpnProfileStore().put(getProfileNameForPackage(packageName), encodedProfile);
} finally {
Binder.restoreCallingIdentity(token);
}
// TODO: if package has CONTROL_VPN, grant the ACTIVATE_PLATFORM_VPN appop.
// This mirrors the prepareAndAuthorize that is used by VpnService.
@@ -3192,26 +3198,28 @@ public class Vpn {
*/
public synchronized void deleteVpnProfile(
@NonNull String packageName) {
checkNotNull(packageName, "No package name provided");
requireNonNull(packageName, "No package name provided");
verifyCallingUidAndPackage(packageName);
enforceNotRestrictedUser();
Binder.withCleanCallingIdentity(
() -> {
// If this profile is providing the current VPN, turn it off, disabling
// always-on as well if enabled.
if (isCurrentIkev2VpnLocked(packageName)) {
if (mAlwaysOn) {
// Will transitively call prepareInternal(VpnConfig.LEGACY_VPN).
setAlwaysOnPackage(null, false, null);
} else {
prepareInternal(VpnConfig.LEGACY_VPN);
}
}
final long token = Binder.clearCallingIdentity();
try {
// If this profile is providing the current VPN, turn it off, disabling
// always-on as well if enabled.
if (isCurrentIkev2VpnLocked(packageName)) {
if (mAlwaysOn) {
// Will transitively call prepareInternal(VpnConfig.LEGACY_VPN).
setAlwaysOnPackage(null, false, null);
} else {
prepareInternal(VpnConfig.LEGACY_VPN);
}
}
getVpnProfileStore().remove(getProfileNameForPackage(packageName));
});
getVpnProfileStore().remove(getProfileNameForPackage(packageName));
} finally {
Binder.restoreCallingIdentity(token);
}
}
/**
@@ -3245,7 +3253,7 @@ public class Vpn {
*/
public synchronized void startVpnProfile(
@NonNull String packageName) {
checkNotNull(packageName, "No package name provided");
requireNonNull(packageName, "No package name provided");
enforceNotRestrictedUser();
@@ -3254,15 +3262,17 @@ public class Vpn {
throw new SecurityException("User consent not granted for package " + packageName);
}
Binder.withCleanCallingIdentity(
() -> {
final VpnProfile profile = getVpnProfilePrivileged(packageName);
if (profile == null) {
throw new IllegalArgumentException("No profile found for " + packageName);
}
final long token = Binder.clearCallingIdentity();
try {
final VpnProfile profile = getVpnProfilePrivileged(packageName);
if (profile == null) {
throw new IllegalArgumentException("No profile found for " + packageName);
}
startVpnProfilePrivileged(profile, packageName);
});
startVpnProfilePrivileged(profile, packageName);
} finally {
Binder.restoreCallingIdentity(token);
}
}
private synchronized void startVpnProfilePrivileged(
@@ -3323,7 +3333,7 @@ public class Vpn {
* @param packageName the package name of the app provisioning this profile
*/
public synchronized void stopVpnProfile(@NonNull String packageName) {
checkNotNull(packageName, "No package name provided");
requireNonNull(packageName, "No package name provided");
enforceNotRestrictedUser();