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/*
* Copyright (C) 2021 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.annotation.Nullable;
import android.os.ServiceManager;
import android.os.ServiceSpecificException;
import android.security.usermanager.IKeystoreUserManager;
import android.system.keystore2.Domain;
import android.system.keystore2.ResponseCode;
import android.util.Log;
/**
* @hide This is the client side for IKeystoreUserManager AIDL.
* It shall only be used by the LockSettingsService.
*/
public class AndroidKeyStoreMaintenance {
private static final String TAG = "AndroidKeyStoreMaintenance";
public static final int SYSTEM_ERROR = ResponseCode.SYSTEM_ERROR;
private static IKeystoreUserManager getService() {
return IKeystoreUserManager.Stub.asInterface(
ServiceManager.checkService("android.security.usermanager"));
}
/**
* Informs Keystore 2.0 about adding a user
*
* @param userId - Android user id of the user being added
* @return 0 if successful or a {@code ResponseCode}
* @hide
*/
public static int onUserAdded(@NonNull int userId) {
if (!android.security.keystore2.AndroidKeyStoreProvider.isInstalled()) return 0;
try {
getService().onUserAdded(userId);
return 0;
} catch (ServiceSpecificException e) {
Log.e(TAG, "onUserAdded failed", e);
return e.errorCode;
} catch (Exception e) {
Log.e(TAG, "Can not connect to keystore", e);
return SYSTEM_ERROR;
}
}
/**
* Informs Keystore 2.0 about removing a usergit mer
*
* @param userId - Android user id of the user being removed
* @return 0 if successful or a {@code ResponseCode}
* @hide
*/
public static int onUserRemoved(int userId) {
if (!android.security.keystore2.AndroidKeyStoreProvider.isInstalled()) return 0;
try {
getService().onUserRemoved(userId);
return 0;
} catch (ServiceSpecificException e) {
Log.e(TAG, "onUserRemoved failed", e);
return e.errorCode;
} catch (Exception e) {
Log.e(TAG, "Can not connect to keystore", e);
return SYSTEM_ERROR;
}
}
/**
* Informs Keystore 2.0 about changing user's password
*
* @param userId - Android user id of the user
* @param password - a secret derived from the synthetic password provided by the
* LockSettingService
* @return 0 if successful or a {@code ResponseCode}
* @hide
*/
public static int onUserPasswordChanged(int userId, @Nullable byte[] password) {
if (!android.security.keystore2.AndroidKeyStoreProvider.isInstalled()) return 0;
try {
getService().onUserPasswordChanged(userId, password);
return 0;
} catch (ServiceSpecificException e) {
Log.e(TAG, "onUserPasswordChanged failed", e);
return e.errorCode;
} catch (Exception e) {
Log.e(TAG, "Can not connect to keystore", e);
return SYSTEM_ERROR;
}
}
/**
* Informs Keystore 2.0 that an app was uninstalled and the corresponding namspace is to
* be cleared.
*/
public static int clearNamespace(@Domain int domain, long namespace) {
if (!android.security.keystore2.AndroidKeyStoreProvider.isInstalled()) return 0;
try {
getService().clearNamespace(domain, namespace);
return 0;
} catch (ServiceSpecificException e) {
Log.e(TAG, "clearNamespace failed", e);
return e.errorCode;
} catch (Exception e) {
Log.e(TAG, "Can not connect to keystore", e);
return SYSTEM_ERROR;
}
}
}
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