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Commit 9b5d4f6d authored by Pavel Grafov's avatar Pavel Grafov Committed by Automerger Merge Worker
Browse files

Merge "Ensure policy has no absurdly long strings" into udc-dev am: 9e30a4e0 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22476865



Change-Id: If130e6201a6d462386f55b8625074a629b2020a1
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents fc83bb64 9e30a4e0

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

+6 −6
Original line number Diff line number Diff line
@@ -13401,11 +13401,10 @@ public class DevicePolicyManager { 
    /**

     * Called by a device admin or holder of the permission

     * {@link android.Manifest.permission#MANAGE_DEVICE_POLICY_SUPPORT_MESSAGE} to set the short

     * support message. This will be displayed to the user

     * in settings screens where funtionality has been disabled by the admin. The message should be

     * limited to a short statement such as "This setting is disabled by your administrator. Contact

     * someone@example.com for support." If the message is longer than 200 characters it may be

     * truncated.

     * support message. This will be displayed to the user in settings screens where functionality

     * has been disabled by the admin. The message should be limited to a short statement such as

     * "This setting is disabled by your administrator. Contact someone@example.com for support."

     * If the message is longer than 200 characters it may be truncated.

     * <p>

     * If the short support message needs to be localized, it is the responsibility of the

     * {@link DeviceAdminReceiver} to listen to the {@link Intent#ACTION_LOCALE_CHANGED} broadcast
@@ -13460,7 +13459,8 @@ public class DevicePolicyManager { 














    /**















     * Called by a device admin to set the long support message. This will be displayed to the user













     * in the device administators settings screen.













     * in the device administrators settings screen. If the message is longer than 20000 characters













     * it may be truncated.















     * <p>















     * If the long support message needs to be localized, it is the responsibility of the















     * {@link DeviceAdminReceiver} to listen to the {@link Intent#ACTION_LOCALE_CHANGED} broadcast

























services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java



+94
−6




























Original line number
Diff line number
Diff line








@@ -39,7 +39,6 @@ import static android.Manifest.permission.MANAGE_DEVICE_POLICY_DEFAULT_SMS;













import static android.Manifest.permission.MANAGE_DEVICE_POLICY_DISPLAY;















import static android.Manifest.permission.MANAGE_DEVICE_POLICY_FACTORY_RESET;















import static android.Manifest.permission.MANAGE_DEVICE_POLICY_FUN;













import static android.Manifest.permission.MANAGE_DEVICE_POLICY_INPUT_METHODS;















import static android.Manifest.permission.MANAGE_DEVICE_POLICY_INSTALL_UNKNOWN_SOURCES;















import static android.Manifest.permission.MANAGE_DEVICE_POLICY_KEYGUARD;















import static android.Manifest.permission.MANAGE_DEVICE_POLICY_LOCALE;










@@ -521,6 +520,7 @@ import java.security.cert.CertificateFactory;













import java.security.cert.X509Certificate;















import java.text.DateFormat;















import java.time.LocalDate;













import java.util.ArrayDeque;















import java.util.ArrayList;















import java.util.Arrays;















import java.util.Collection;









@@ -533,6 +533,7 @@ import java.util.List;













import java.util.Locale;















import java.util.Map;















import java.util.Objects;













import java.util.Queue;















import java.util.Set;















import java.util.concurrent.CompletableFuture;















import java.util.concurrent.ExecutionException;










@@ -568,7 +569,15 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {



























    private static final int REQUEST_PROFILE_OFF_DEADLINE = 5572;



























    // Binary XML serializer doesn't support longer strings













    private static final int MAX_POLICY_STRING_LENGTH = 65535;













    // FrameworkParsingPackageUtils#MAX_FILE_NAME_SIZE, Android packages are used in dir names.













    private static final int MAX_PACKAGE_NAME_LENGTH = 223;



























    private static final int MAX_PROFILE_NAME_LENGTH = 200;













    private static final int MAX_LONG_SUPPORT_MESSAGE_LENGTH = 20000;













    private static final int MAX_SHORT_SUPPORT_MESSAGE_LENGTH = 200;













    private static final int MAX_ORG_NAME_LENGTH = 200;





























    private static final long MS_PER_DAY = TimeUnit.DAYS.toMillis(1);
























@@ -11730,7 +11739,15 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













        }





























        Objects.requireNonNull(agent, "agent is null");













        int userHandle = UserHandle.getCallingUserId();

























        enforceMaxPackageNameLength(agent.getPackageName());













        final String agentAsString = agent.flattenToString();













        enforceMaxStringLength(agentAsString, "agent name");













        if (args != null) {













            enforceMaxStringLength(args, "args");













        }

























        int userHandle = mInjector.userHandleGetCallingUserId();















        synchronized (getLockObject()) {















            ActiveAdmin ap;















            if (isPermissionCheckFlagEnabled()) {









@@ -11747,7 +11764,7 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













            checkCanExecuteOrThrowUnsafe(















                    DevicePolicyManager.OPERATION_SET_TRUST_AGENT_CONFIGURATION);



























            ap.trustAgentInfos.put(agent.flattenToString(), new TrustAgentInfo(args));













            ap.trustAgentInfos.put(agentAsString, new TrustAgentInfo(args));















            saveSettingsLocked(userHandle);















        }















    }










@@ -12017,6 +12034,10 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













                isDeviceOwner(caller) || isProfileOwner(caller));





























        if (packageList != null) {













            for (String pkg : packageList) {













                enforceMaxPackageNameLength(pkg);













            }



























            int userId = caller.getUserId();















            final List<AccessibilityServiceInfo> enabledServices;















            long id = mInjector.binderClearCallingIdentity();










@@ -12198,6 +12219,10 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













        }





























        if (packageList != null) {













            for (String pkg : packageList) {













                enforceMaxPackageNameLength(pkg);













            }



























            List<InputMethodInfo> enabledImes = mInjector.binderWithCleanCallingIdentity(() ->















                    InputMethodManagerInternal.get().getEnabledInputMethodListAsUser(userId));















            if (enabledImes != null) {










@@ -14082,6 +14107,9 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













        if (!mHasFeature) {















            return;















        }

























        enforceMaxStringLength(accountType, "account type");



























        CallerIdentity caller;















        if (isPermissionCheckFlagEnabled()) {















            caller = getCallerIdentity(who, callerPackageName);










@@ -14772,6 +14800,10 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













    public void setLockTaskPackages(ComponentName who, String callerPackageName, String[] packages)















            throws SecurityException {















        Objects.requireNonNull(packages, "packages is null");













        for (String pkg : packages) {













            enforceMaxPackageNameLength(pkg);













        }



























        CallerIdentity caller;















        if (isPolicyEngineForFinanceFlagEnabled()) {















            caller = getCallerIdentity(who, callerPackageName);










@@ -17374,6 +17406,8 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













        CallerIdentity caller;















        ActiveAdmin admin;



























        message = truncateIfLonger(message, MAX_SHORT_SUPPORT_MESSAGE_LENGTH);



























        if (isPermissionCheckFlagEnabled()) {















            caller = getCallerIdentity(who, callerPackageName);















            EnforcingAdmin enforcingAdmin = enforcePermissionAndGetEnforcingAdmin(










@@ -17434,6 +17468,9 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













        if (!mHasFeature) {















            return;















        }

























        message = truncateIfLonger(message, MAX_LONG_SUPPORT_MESSAGE_LENGTH);



























        Objects.requireNonNull(who, "ComponentName is null");















        final CallerIdentity caller = getCallerIdentity(who);















        synchronized (getLockObject()) {










@@ -17598,6 +17635,8 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













            Preconditions.checkCallAuthorization(isDeviceOwner(caller) || isProfileOwner(caller));















        }



























        text = truncateIfLonger(text, MAX_ORG_NAME_LENGTH);



























        synchronized (getLockObject()) {















            if (!isPermissionCheckFlagEnabled()) {















                admin = getProfileOwnerOrDeviceOwnerLocked(caller.getUserId());










@@ -17878,9 +17917,8 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













            throw new IllegalArgumentException("ids must not be null");















        }















        for (String id : ids) {













            if (TextUtils.isEmpty(id)) {













                throw new IllegalArgumentException("ids must not contain empty string");













            }













            Preconditions.checkArgument(!TextUtils.isEmpty(id), "ids must not have empty string");













            enforceMaxStringLength(id, "affiliation id");















        }





























        final Set<String> affiliationIds = new ArraySet<>(ids);










@@ -19393,6 +19431,9 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













                "Provided administrator and target are the same object.");















        Preconditions.checkArgument(!admin.getPackageName().equals(target.getPackageName()),















                "Provided administrator and target have the same package name.");













        if (bundle != null) {













            enforceMaxStringLength(bundle, "bundle");













        }





























        final CallerIdentity caller = getCallerIdentity(admin);















        Preconditions.checkCallAuthorization(










@@ -24137,6 +24178,53 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {













        });















    }



























    /**













     * Truncates char sequence to maximum length, nulls are ignored.













     */













    private static CharSequence truncateIfLonger(CharSequence input, int maxLength) {













        return input == null || input.length() <= maxLength













                ? input













                : input.subSequence(0, maxLength);













    }

























    /**













     * Throw if string argument is too long to be serialized.













     */













    private static void enforceMaxStringLength(String str, String argName) {













        Preconditions.checkArgument(













                str.length() <= MAX_POLICY_STRING_LENGTH, argName + " loo long");













    }

























    private static void enforceMaxPackageNameLength(String pkg) {













        Preconditions.checkArgument(













                pkg.length() <= MAX_PACKAGE_NAME_LENGTH, "Package name too long");













    }

























    /**













     * Throw if persistable bundle contains any string that we can't serialize.













     */













    private static void enforceMaxStringLength(PersistableBundle bundle, String argName) {













        // Persistable bundles can have other persistable bundles as values, traverse with a queue.













        Queue<PersistableBundle> queue = new ArrayDeque<>();













        queue.add(bundle);













        while (!queue.isEmpty()) {













            PersistableBundle current = queue.remove();













            for (String key : current.keySet()) {













                enforceMaxStringLength(key, "key in " + argName);













                Object value = current.get(key);













                if (value instanceof String) {













                    enforceMaxStringLength((String) value, "string value in " + argName);













                } else if (value instanceof String[]) {













                    for (String str : (String[]) value) {













                        enforceMaxStringLength(str, "string value in " + argName);













                    }













                } else if (value instanceof PersistableBundle) {













                    queue.add((PersistableBundle) value);













                }













            }













        }













    }



























    private ActiveAdmin getActiveAdminForCaller(@Nullable ComponentName who,















            CallerIdentity caller) {















        synchronized (getLockObject()) {

























services/tests/servicestests/src/com/android/server/devicepolicy/DevicePolicyManagerTest.java



+41
−0




























Original line number
Diff line number
Diff line








@@ -130,6 +130,7 @@ import android.os.Build;













import android.os.Build.VERSION_CODES;















import android.os.Bundle;















import android.os.IpcDataCache;













import android.os.PersistableBundle;















import android.os.Process;















import android.os.UserHandle;















import android.os.UserManager;










@@ -8526,6 +8527,46 @@ public class DevicePolicyManagerTest extends DpmTestBase {













                eq(FUSED_PROVIDER), any(), eq(getServices().executor), any());















    }





























    /**













     * Verifies that bundles with tons of moderately long strings are persisted correctly.













     *













     * Policy is serialized into binary XML and there is a limit on the max string length: 65535.













     * This test ensures that as long as each string in the trust agent configuration is below this













     * limit, the policy can be serialized and deserialized correctly, even when the total length













     * of the configuration is above that limit. This should be the case because PersistableBundle













     * contents are stored as XML subtrees rather than as strings.













     */













    @Test













    public void testSetTrustAgentConfiguration_largeBundlePersisted() {













        setAsProfileOwner(admin1);



























        ComponentName agent = new ComponentName("some.trust.agent", "some.trust.agent.Agent");













        PersistableBundle configIn = new PersistableBundle();













        String kilobyteString = new String(new char[1024]).replace('\0', 'A');













        for (int i = 0; i < 1024; i++) {













            configIn.putString("key-" + i, kilobyteString);













        }



























        runAsCaller(mAdmin1Context, dpms, dpm -> {













            dpm.setTrustAgentConfiguration(admin1, agent, configIn);













        });



























        // Re-read policies to see if they were serialized/deserialized correctly.













        initializeDpms();



























        List<PersistableBundle> configsOut = new ArrayList<>();













        runAsCaller(mAdmin1Context, dpms, dpm -> {













            configsOut.addAll(dpm.getTrustAgentConfiguration(admin1, agent));













        });



























        assertThat(configsOut.size()).isEqualTo(1);













        PersistableBundle configOut = configsOut.get(0);













        assertThat(configOut.size()).isEqualTo(1024);













        for (int i = 0; i < 1024; i++) {













            assertThat(configOut.getString("key-" + i, null)).isEqualTo(kilobyteString);













        }













    }





























    private void setupVpnAuthorization(String userVpnPackage, int userVpnUid) {















        final AppOpsManager.PackageOps vpnOp = new AppOpsManager.PackageOps(userVpnPackage,















                userVpnUid, List.of(new AppOpsManager.OpEntry(