| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.security; |
| |
| import android.annotation.NonNull; |
| import android.os.ServiceManager; |
| import android.os.ServiceSpecificException; |
| import android.security.legacykeystore.ILegacyKeystore; |
| import android.util.Log; |
| |
| /** |
| * @hide This class allows legacy VPN access to its profiles that were stored in Keystore. |
| * The storage of unstructured blobs in Android Keystore is going away, because there is no |
| * architectural or security benefit of storing profiles in keystore over storing them |
| * in the file system. This class allows access to the blobs that still exist in keystore. |
| * And it stores new blob in a database that is still owned by Android Keystore. |
| */ |
| public class LegacyVpnProfileStore { |
| private static final String TAG = "LegacyVpnProfileStore"; |
| |
| public static final int SYSTEM_ERROR = ILegacyKeystore.ERROR_SYSTEM_ERROR; |
| public static final int PROFILE_NOT_FOUND = ILegacyKeystore.ERROR_ENTRY_NOT_FOUND; |
| |
| private static final String LEGACY_KEYSTORE_SERVICE_NAME = "android.security.legacykeystore"; |
| |
| private static ILegacyKeystore getService() { |
| return ILegacyKeystore.Stub.asInterface( |
| ServiceManager.checkService(LEGACY_KEYSTORE_SERVICE_NAME)); |
| } |
| |
| /** |
| * Stores the profile under the alias in the profile database. Existing profiles by the |
| * same name will be replaced. |
| * @param alias The name of the profile |
| * @param profile The profile. |
| * @return true if the profile was successfully added. False otherwise. |
| * @hide |
| */ |
| public static boolean put(@NonNull String alias, @NonNull byte[] profile) { |
| try { |
| getService().put(alias, ILegacyKeystore.UID_SELF, profile); |
| return true; |
| } catch (Exception e) { |
| Log.e(TAG, "Failed to put vpn profile.", e); |
| return false; |
| } |
| } |
| |
| /** |
| * Retrieves a profile by the name alias from the profile database. |
| * @param alias Name of the profile to retrieve. |
| * @return The unstructured blob, that is the profile that was stored using |
| * LegacyVpnProfileStore#put or with |
| * android.security.Keystore.put(Credentials.VPN + alias). |
| * Returns null if no profile was found. |
| * @hide |
| */ |
| public static byte[] get(@NonNull String alias) { |
| try { |
| return getService().get(alias, ILegacyKeystore.UID_SELF); |
| } catch (ServiceSpecificException e) { |
| if (e.errorCode != PROFILE_NOT_FOUND) { |
| Log.e(TAG, "Failed to get vpn profile.", e); |
| } |
| } catch (Exception e) { |
| Log.e(TAG, "Failed to get vpn profile.", e); |
| } |
| return null; |
| } |
| |
| /** |
| * Removes a profile by the name alias from the profile database. |
| * @param alias Name of the profile to be removed. |
| * @return True if a profile was removed. False if no such profile was found. |
| * @hide |
| */ |
| public static boolean remove(@NonNull String alias) { |
| try { |
| getService().remove(alias, ILegacyKeystore.UID_SELF); |
| return true; |
| } catch (ServiceSpecificException e) { |
| if (e.errorCode != PROFILE_NOT_FOUND) { |
| Log.e(TAG, "Failed to remove vpn profile.", e); |
| } |
| } catch (Exception e) { |
| Log.e(TAG, "Failed to remove vpn profile.", e); |
| } |
| return false; |
| } |
| |
| /** |
| * Lists the vpn profiles stored in the database. |
| * @return An array of strings representing the aliases stored in the profile database. |
| * The return value may be empty but never null. |
| * @hide |
| */ |
| public static @NonNull String[] list(@NonNull String prefix) { |
| try { |
| final String[] aliases = getService().list(prefix, ILegacyKeystore.UID_SELF); |
| for (int i = 0; i < aliases.length; ++i) { |
| aliases[i] = aliases[i].substring(prefix.length()); |
| } |
| return aliases; |
| } catch (Exception e) { |
| Log.e(TAG, "Failed to list vpn profiles.", e); |
| } |
| return new String[0]; |
| } |
| } |