am 771ad8b7: Merge "Limit grantTrust() duration to DevicePolicy-imposed limit." into lmp-dev (c047a951) · Commits · e / os / android_frameworks_base

core/java/android/app/admin/DevicePolicyManager.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -1374,7 +1374,7 @@ public class DevicePolicyManager {
		* @param admin The name of the admin component to check, or null to aggregate
		* all admins.
		* @return time in milliseconds for the given admin or the minimum value (strictest) of
		* all admins if admin is null.
		* all admins if admin is null. Returns 0 if there are no restrictions.
		*/
		public long getMaximumTimeToLock(ComponentName admin) {
		return getMaximumTimeToLock(admin, UserHandle.myUserId());

services/core/java/com/android/server/trust/TrustAgentWrapper.java

+34 −5

Original line number	Diff line number	Diff line
		@@ -51,7 +51,7 @@ import java.util.List;
		public class TrustAgentWrapper {
		private static final String EXTRA_COMPONENT_NAME = "componentName";
		private static final String TRUST_EXPIRED_ACTION = "android.server.trust.TRUST_EXPIRED_ACTION";
		private static final String PERMISSION = "android.permission.PROVIDE_TRUST_AGENT";
		private static final String PERMISSION = android.Manifest.permission.PROVIDE_TRUST_AGENT;
		private static final boolean DEBUG = false;
		private static final String TAG = "TrustAgentWrapper";

		@@ -81,6 +81,7 @@ public class TrustAgentWrapper {
		private ITrustAgentService mTrustAgentService;
		private boolean mBound;
		private long mScheduledRestartUptimeMillis;
		private long mMaximumTimeToLock; // from DevicePolicyManager

		// Trust state
		private boolean mTrusted;
		@@ -90,6 +91,7 @@ public class TrustAgentWrapper {
		private IBinder mSetTrustAgentFeaturesToken;
		private AlarmManager mAlarmManager;
		private final Intent mAlarmIntent;
		private PendingIntent mAlarmPendingIntent;

		private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
		@Override
		@@ -118,10 +120,25 @@ public class TrustAgentWrapper {
		boolean initiatedByUser = msg.arg1 != 0;
		long durationMs = msg.getData().getLong(DATA_DURATION);
		if (durationMs > 0) {
		long expiration = SystemClock.elapsedRealtime() + durationMs;
		PendingIntent op = PendingIntent.getBroadcast(mContext, 0, mAlarmIntent,
		final long duration;
		if (mMaximumTimeToLock != 0) {
		// Enforce DevicePolicyManager timeout. This is here as a safeguard to
		// ensure trust agents are evaluating trust state at least as often as
		// the policy dictates. Admins that want more guarantees should be using
		// DevicePolicyManager#KEYGUARD_DISABLE_TRUST_AGENTS.
		duration = Math.min(durationMs, mMaximumTimeToLock);
		if (DEBUG) {
		Log.v(TAG, "DPM lock timeout in effect. Timeout adjusted from "
		+ durationMs + " to " + duration);
		}
		} else {
		duration = durationMs;
		}
		long expiration = SystemClock.elapsedRealtime() + duration;
		mAlarmPendingIntent = PendingIntent.getBroadcast(mContext, 0, mAlarmIntent,
		PendingIntent.FLAG_CANCEL_CURRENT);
		mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, expiration, op);
		mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, expiration,
		mAlarmPendingIntent);
		}
		mTrustManagerService.mArchive.logGrantTrust(mUserId, mName,
		(mMessage != null ? mMessage.toString() : null),
		@@ -244,12 +261,13 @@ public class TrustAgentWrapper {

		mAlarmIntent = new Intent(TRUST_EXPIRED_ACTION).putExtra(EXTRA_COMPONENT_NAME, mName);
		mAlarmIntent.setData(Uri.parse(mAlarmIntent.toUri(Intent.URI_INTENT_SCHEME)));
		mAlarmIntent.setPackage(context.getPackageName());

		final IntentFilter alarmFilter = new IntentFilter(TRUST_EXPIRED_ACTION);
		alarmFilter.addDataScheme(mAlarmIntent.getScheme());
		final String pathUri = mAlarmIntent.toUri(Intent.URI_INTENT_SCHEME);
		alarmFilter.addDataPath(pathUri, PatternMatcher.PATTERN_LITERAL);
		mContext.registerReceiver(mBroadcastReceiver, alarmFilter);
		mContext.registerReceiver(mBroadcastReceiver, alarmFilter, PERMISSION, null);

		// Schedules a restart for when connecting times out. If the connection succeeds,
		// the restart is canceled in mCallback's onConnected.
		@@ -319,6 +337,17 @@ public class TrustAgentWrapper {
		mSetTrustAgentFeaturesToken);
		}
		}
		final long maxTimeToLock = dpm.getMaximumTimeToLock(null);
		if (maxTimeToLock != mMaximumTimeToLock) {
		// If the timeout changes, cancel the alarm and send a timeout event to have
		// the agent re-evaluate trust.
		mMaximumTimeToLock = maxTimeToLock;
		if (mAlarmPendingIntent != null) {
		mAlarmManager.cancel(mAlarmPendingIntent);
		mAlarmPendingIntent = null;
		mHandler.sendEmptyMessage(MSG_TRUST_TIMEOUT);
		}
		}
		}
		} catch (RemoteException e) {
		onError(e);