429 lines
18 KiB
Java
429 lines
18 KiB
Java
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.email.activity.setup;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.app.Dialog;
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import android.app.DialogFragment;
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import android.app.FragmentManager;
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import android.app.admin.DevicePolicyManager;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.Intent;
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import android.content.res.Resources;
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import android.os.Bundle;
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import com.android.email.R;
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import com.android.email.SecurityPolicy;
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import com.android.email.activity.ActivityHelper;
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import com.android.email2.ui.MailActivityEmail;
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import com.android.emailcommon.provider.Account;
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import com.android.emailcommon.provider.HostAuth;
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import com.android.emailcommon.utility.Utility;
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import com.android.mail.utils.LogUtils;
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/**
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* Psuedo-activity (no UI) to bootstrap the user up to a higher desired security level. This
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* bootstrap requires the following steps.
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*
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* 1. Confirm the account of interest has any security policies defined - exit early if not
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* 2. If not actively administrating the device, ask Device Policy Manager to start that
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* 3. When we are actively administrating, check current policies and see if they're sufficient
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* 4. If not, set policies
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* 5. If necessary, request for user to update device password
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* 6. If necessary, request for user to activate device encryption
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*/
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public class AccountSecurity extends Activity {
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private static final String TAG = "Email/AccountSecurity";
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private static final boolean DEBUG = true; // STOPSHIP Don't ship with this set to true
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private static final String EXTRA_ACCOUNT_ID = "ACCOUNT_ID";
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private static final String EXTRA_SHOW_DIALOG = "SHOW_DIALOG";
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private static final String EXTRA_PASSWORD_EXPIRING = "EXPIRING";
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private static final String EXTRA_PASSWORD_EXPIRED = "EXPIRED";
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private static final int REQUEST_ENABLE = 1;
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private static final int REQUEST_PASSWORD = 2;
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private static final int REQUEST_ENCRYPTION = 3;
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private boolean mTriedAddAdministrator = false;
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private boolean mTriedSetPassword = false;
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private boolean mTriedSetEncryption = false;
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private Account mAccount;
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/**
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* Used for generating intent for this activity (which is intended to be launched
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* from a notification.)
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*
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* @param context Calling context for building the intent
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* @param accountId The account of interest
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* @param showDialog If true, a simple warning dialog will be shown before kicking off
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* the necessary system settings. Should be true anywhere the context of the security settings
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* is not clear (e.g. any time after the account has been set up).
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* @return an Intent which can be used to view that account
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*/
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public static Intent actionUpdateSecurityIntent(Context context, long accountId,
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boolean showDialog) {
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Intent intent = new Intent(context, AccountSecurity.class);
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intent.putExtra(EXTRA_ACCOUNT_ID, accountId);
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intent.putExtra(EXTRA_SHOW_DIALOG, showDialog);
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return intent;
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}
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/**
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* Used for generating intent for this activity (which is intended to be launched
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* from a notification.) This is a special mode of this activity which exists only
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* to give the user a dialog (for context) about a device pin/password expiration event.
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*/
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public static Intent actionDevicePasswordExpirationIntent(Context context, long accountId,
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boolean expired) {
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Intent intent = new ForwardingIntent(context, AccountSecurity.class);
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intent.putExtra(EXTRA_ACCOUNT_ID, accountId);
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intent.putExtra(expired ? EXTRA_PASSWORD_EXPIRED : EXTRA_PASSWORD_EXPIRING, true);
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return intent;
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}
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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ActivityHelper.debugSetWindowFlags(this);
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Intent i = getIntent();
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final long accountId = i.getLongExtra(EXTRA_ACCOUNT_ID, -1);
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final boolean showDialog = i.getBooleanExtra(EXTRA_SHOW_DIALOG, false);
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final boolean passwordExpiring = i.getBooleanExtra(EXTRA_PASSWORD_EXPIRING, false);
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final boolean passwordExpired = i.getBooleanExtra(EXTRA_PASSWORD_EXPIRED, false);
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SecurityPolicy security = SecurityPolicy.getInstance(this);
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security.clearNotification();
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if (accountId == -1) {
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finish();
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return;
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}
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mAccount = Account.restoreAccountWithId(AccountSecurity.this, accountId);
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if (mAccount == null) {
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finish();
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return;
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}
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// Special handling for password expiration events
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if (passwordExpiring || passwordExpired) {
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FragmentManager fm = getFragmentManager();
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if (fm.findFragmentByTag("password_expiration") == null) {
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PasswordExpirationDialog dialog =
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PasswordExpirationDialog.newInstance(mAccount.getDisplayName(),
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passwordExpired);
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Showing password expiration dialog");
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}
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dialog.show(fm, "password_expiration");
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}
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return;
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}
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// Otherwise, handle normal security settings flow
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if (mAccount.mPolicyKey != 0) {
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// This account wants to control security
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if (showDialog) {
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// Show dialog first, unless already showing (e.g. after rotation)
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FragmentManager fm = getFragmentManager();
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if (fm.findFragmentByTag("security_needed") == null) {
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SecurityNeededDialog dialog =
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SecurityNeededDialog.newInstance(mAccount.getDisplayName());
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Showing security needed dialog");
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}
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dialog.show(fm, "security_needed");
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}
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} else {
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// Go directly to security settings
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tryAdvanceSecurity(mAccount);
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}
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return;
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}
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finish();
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}
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/**
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* After any of the activities return, try to advance to the "next step"
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*/
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@Override
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protected void onActivityResult(int requestCode, int resultCode, Intent data) {
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tryAdvanceSecurity(mAccount);
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super.onActivityResult(requestCode, resultCode, data);
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}
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/**
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* Walk the user through the required steps to become an active administrator and with
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* the requisite security settings for the given account.
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*
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* These steps will be repeated each time we return from a given attempt (e.g. asking the
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* user to choose a device pin/password). In a typical activation, we may repeat these
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* steps a few times. It may go as far as step 5 (password) or step 6 (encryption), but it
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* will terminate when step 2 (isActive()) succeeds.
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*
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* If at any point we do not advance beyond a given user step, (e.g. the user cancels
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* instead of setting a password) we simply repost the security notification, and exit.
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* We never want to loop here.
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*/
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private void tryAdvanceSecurity(Account account) {
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SecurityPolicy security = SecurityPolicy.getInstance(this);
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// Step 1. Check if we are an active device administrator, and stop here to activate
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if (!security.isActiveAdmin()) {
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if (mTriedAddAdministrator) {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Not active admin: repost notification");
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}
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repostNotification(account, security);
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finish();
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} else {
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mTriedAddAdministrator = true;
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// retrieve name of server for the format string
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HostAuth hostAuth = HostAuth.restoreHostAuthWithId(this, account.mHostAuthKeyRecv);
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if (hostAuth == null) {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "No HostAuth: repost notification");
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}
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repostNotification(account, security);
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finish();
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} else {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Not active admin: post initial notification");
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}
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// try to become active - must happen here in activity, to get result
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Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
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intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,
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security.getAdminComponent());
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intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
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this.getString(R.string.account_security_policy_explanation_fmt,
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hostAuth.mAddress));
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startActivityForResult(intent, REQUEST_ENABLE);
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}
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}
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return;
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}
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// Step 2. Check if the current aggregate security policy is being satisfied by the
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// DevicePolicyManager (the current system security level).
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if (security.isActive(null)) {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Security active; clear holds");
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}
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Account.clearSecurityHoldOnAllAccounts(this);
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security.syncAccount(account);
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security.clearNotification();
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finish();
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return;
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}
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// Step 3. Try to assert the current aggregate security requirements with the system.
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security.setActivePolicies();
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// Step 4. Recheck the security policy, and determine what changes are needed (if any)
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// to satisfy the requirements.
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int inactiveReasons = security.getInactiveReasons(null);
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// Step 5. If password is needed, try to have the user set it
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if ((inactiveReasons & SecurityPolicy.INACTIVE_NEED_PASSWORD) != 0) {
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if (mTriedSetPassword) {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Password needed; repost notification");
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}
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repostNotification(account, security);
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finish();
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} else {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Password needed; request it via DPM");
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}
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mTriedSetPassword = true;
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// launch the activity to have the user set a new password.
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Intent intent = new Intent(DevicePolicyManager.ACTION_SET_NEW_PASSWORD);
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startActivityForResult(intent, REQUEST_PASSWORD);
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}
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return;
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}
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// Step 6. If encryption is needed, try to have the user set it
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if ((inactiveReasons & SecurityPolicy.INACTIVE_NEED_ENCRYPTION) != 0) {
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if (mTriedSetEncryption) {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Encryption needed; repost notification");
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}
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repostNotification(account, security);
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finish();
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} else {
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Encryption needed; request it via DPM");
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}
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mTriedSetEncryption = true;
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// launch the activity to start up encryption.
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Intent intent = new Intent(DevicePolicyManager.ACTION_START_ENCRYPTION);
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startActivityForResult(intent, REQUEST_ENCRYPTION);
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}
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return;
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}
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// Step 7. No problems were found, so clear holds and exit
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Policies enforced; clear holds");
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}
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Account.clearSecurityHoldOnAllAccounts(this);
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security.syncAccount(account);
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security.clearNotification();
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finish();
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}
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/**
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* Mark an account as not-ready-for-sync and post a notification to bring the user back here
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* eventually.
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*/
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private void repostNotification(final Account account, final SecurityPolicy security) {
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if (account == null) return;
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Utility.runAsync(new Runnable() {
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@Override
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public void run() {
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security.policiesRequired(account.mId);
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}
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});
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}
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/**
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* Dialog briefly shown in some cases, to indicate the user that a security update is needed.
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* If the user clicks OK, we proceed into the "tryAdvanceSecurity" flow. If the user cancels,
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* we repost the notification and finish() the activity.
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*/
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public static class SecurityNeededDialog extends DialogFragment
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implements DialogInterface.OnClickListener {
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private static final String BUNDLE_KEY_ACCOUNT_NAME = "account_name";
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/**
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* Create a new dialog.
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*/
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public static SecurityNeededDialog newInstance(String accountName) {
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final SecurityNeededDialog dialog = new SecurityNeededDialog();
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Bundle b = new Bundle();
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b.putString(BUNDLE_KEY_ACCOUNT_NAME, accountName);
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dialog.setArguments(b);
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return dialog;
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}
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@Override
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public Dialog onCreateDialog(Bundle savedInstanceState) {
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final String accountName = getArguments().getString(BUNDLE_KEY_ACCOUNT_NAME);
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final Context context = getActivity();
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final Resources res = context.getResources();
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final AlertDialog.Builder b = new AlertDialog.Builder(context);
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b.setTitle(R.string.account_security_dialog_title);
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b.setIconAttribute(android.R.attr.alertDialogIcon);
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b.setMessage(res.getString(R.string.account_security_dialog_content_fmt, accountName));
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b.setPositiveButton(R.string.okay_action, this);
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b.setNegativeButton(R.string.cancel_action, this);
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "Posting security needed dialog");
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}
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return b.create();
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}
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@Override
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public void onClick(DialogInterface dialog, int which) {
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dismiss();
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AccountSecurity activity = (AccountSecurity) getActivity();
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if (activity.mAccount == null) {
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// Clicked before activity fully restored - probably just monkey - exit quickly
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activity.finish();
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return;
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}
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switch (which) {
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case DialogInterface.BUTTON_POSITIVE:
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "User accepts; advance to next step");
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}
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activity.tryAdvanceSecurity(activity.mAccount);
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break;
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case DialogInterface.BUTTON_NEGATIVE:
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if (MailActivityEmail.DEBUG || DEBUG) {
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LogUtils.d(TAG, "User declines; repost notification");
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}
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activity.repostNotification(
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activity.mAccount, SecurityPolicy.getInstance(activity));
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activity.finish();
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break;
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}
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}
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}
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/**
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* Dialog briefly shown in some cases, to indicate the user that the PIN/Password is expiring
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* or has expired. If the user clicks OK, we launch the password settings screen.
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*/
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public static class PasswordExpirationDialog extends DialogFragment
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implements DialogInterface.OnClickListener {
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private static final String BUNDLE_KEY_ACCOUNT_NAME = "account_name";
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private static final String BUNDLE_KEY_EXPIRED = "expired";
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/**
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* Create a new dialog.
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*/
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public static PasswordExpirationDialog newInstance(String accountName, boolean expired) {
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final PasswordExpirationDialog dialog = new PasswordExpirationDialog();
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Bundle b = new Bundle();
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b.putString(BUNDLE_KEY_ACCOUNT_NAME, accountName);
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b.putBoolean(BUNDLE_KEY_EXPIRED, expired);
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dialog.setArguments(b);
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return dialog;
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}
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/**
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* Note, this actually creates two slightly different dialogs (for expiring vs. expired)
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*/
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@Override
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public Dialog onCreateDialog(Bundle savedInstanceState) {
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final String accountName = getArguments().getString(BUNDLE_KEY_ACCOUNT_NAME);
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final boolean expired = getArguments().getBoolean(BUNDLE_KEY_EXPIRED);
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final int titleId = expired
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? R.string.password_expired_dialog_title
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: R.string.password_expire_warning_dialog_title;
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final int contentId = expired
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? R.string.password_expired_dialog_content_fmt
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: R.string.password_expire_warning_dialog_content_fmt;
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final Context context = getActivity();
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final Resources res = context.getResources();
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final AlertDialog.Builder b = new AlertDialog.Builder(context);
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b.setTitle(titleId);
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b.setIconAttribute(android.R.attr.alertDialogIcon);
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b.setMessage(res.getString(contentId, accountName));
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b.setPositiveButton(R.string.okay_action, this);
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b.setNegativeButton(R.string.cancel_action, this);
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return b.create();
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}
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@Override
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public void onClick(DialogInterface dialog, int which) {
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dismiss();
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AccountSecurity activity = (AccountSecurity) getActivity();
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if (which == DialogInterface.BUTTON_POSITIVE) {
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Intent intent = new Intent(DevicePolicyManager.ACTION_SET_NEW_PASSWORD);
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activity.startActivity(intent);
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}
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activity.finish();
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}
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}
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}
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