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/*
* Nextcloud Android client application
*
* @author David Luhmer
* @author Andy Scherzinger
* Copyright (C) 2018 David Luhmer
* Copyright (C) 2018 Andy Scherzinger
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.owncloud.android.ui.activity;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.ForegroundColorSpan;
import android.text.style.StyleSpan;
import com.google.android.material.dialog.MaterialAlertDialogBuilder;
import com.nextcloud.android.sso.Constants;
import com.owncloud.android.MainApp;
import com.owncloud.android.R;
import com.owncloud.android.databinding.DialogSsoGrantPermissionBinding;
import com.owncloud.android.lib.common.OwnCloudAccount;
import com.owncloud.android.lib.common.accounts.AccountUtils;
import com.owncloud.android.lib.common.utils.Log_OC;
import com.owncloud.android.utils.EncryptionUtils;
import java.util.UUID;
import static com.nextcloud.android.sso.Constants.DELIMITER;
import static com.nextcloud.android.sso.Constants.EXCEPTION_ACCOUNT_ACCESS_DECLINED;
import static com.nextcloud.android.sso.Constants.EXCEPTION_ACCOUNT_NOT_FOUND;
import static com.nextcloud.android.sso.Constants.NEXTCLOUD_FILES_ACCOUNT;
import static com.nextcloud.android.sso.Constants.NEXTCLOUD_SSO;
import static com.nextcloud.android.sso.Constants.NEXTCLOUD_SSO_EXCEPTION;
import static com.nextcloud.android.sso.Constants.SSO_SHARED_PREFERENCE;
/**
* Activity for granting access rights to a Nextcloud account, used for SSO.
*/
public class SsoGrantPermissionActivity extends BaseActivity {
private static final String TAG = SsoGrantPermissionActivity.class.getCanonicalName();
private String packageName;
private Account account;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DialogSsoGrantPermissionBinding binding = DialogSsoGrantPermissionBinding.inflate(getLayoutInflater());
ComponentName callingActivity = getCallingActivity();
if (callingActivity != null) {
packageName = callingActivity.getPackageName();
final String appName = getAppNameForPackage(packageName);
account = getIntent().getParcelableExtra(NEXTCLOUD_FILES_ACCOUNT);
final SpannableStringBuilder dialogText = makeSpecialPartsBold(
getString(R.string.single_sign_on_request_token, appName, account.name),
appName,
account.name);
binding.permissionText.setText(dialogText);
try {
if (packageName != null) {
Drawable appIcon = getPackageManager().getApplicationIcon(packageName);
binding.appIcon.setImageDrawable(appIcon);
}
} catch (PackageManager.NameNotFoundException e) {
Log_OC.e(TAG, "Error retrieving app icon", e);
}
final MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(this)
.setView(binding.getRoot())
.setCancelable(false)
.setPositiveButton(R.string.permission_allow, (dialog, which) -> grantPermission())
.setNegativeButton(R.string.permission_deny, (dialog, which) -> exitFailed());
builder.show();
Log_OC.v(TAG, "TOKEN-REQUEST: Calling Package: " + packageName);
Log_OC.v(TAG, "TOKEN-REQUEST: App Name: " + appName);
} else {
// Activity was not started using startActivityForResult!
Log_OC.e(TAG, "Calling Package is null");
setResultAndExit("Request was not executed properly. Use startActivityForResult()");
}
}
private SpannableStringBuilder makeSpecialPartsBold(String text, String... toBeStyledText) {
SpannableStringBuilder ssb = new SpannableStringBuilder(text);
for (String textBlock : toBeStyledText) {
int start = text.indexOf(textBlock);
int end = start + textBlock.length();
ssb.setSpan(new StyleSpan(Typeface.BOLD), start, end, 0);
ssb.setSpan(new ForegroundColorSpan(getResources().getColor(R.color.text_color)), start, end,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
return ssb;
}
private void setResultAndExit(String exception) {
Intent data = new Intent();
data.putExtra(NEXTCLOUD_SSO_EXCEPTION, exception);
setResult(RESULT_CANCELED, data);
finish();
}
private String getAppNameForPackage(String pkg) {
final PackageManager pm = getApplicationContext().getPackageManager();
ApplicationInfo ai = null;
try {
ai = pm.getApplicationInfo(pkg, 0);
} catch (final PackageManager.NameNotFoundException e) {
Log_OC.e(TAG, "Error fetching app name for package", e);
}
return (String) (ai != null ? pm.getApplicationLabel(ai) : "(unknown)");
}
private void exitFailed() {
setResultAndExit(EXCEPTION_ACCOUNT_ACCESS_DECLINED);
}
private void grantPermission() {
// create token
SharedPreferences sharedPreferences = getSharedPreferences(SSO_SHARED_PREFERENCE, Context.MODE_PRIVATE);
String token = UUID.randomUUID().toString().replaceAll("-", "");
String hashedTokenWithSalt = EncryptionUtils.generateSHA512(token);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(packageName + DELIMITER + account.name, hashedTokenWithSalt);
editor.apply();
String serverUrl;
String userId;
try {
OwnCloudAccount ocAccount = new OwnCloudAccount(account, this);
serverUrl = ocAccount.getBaseUri().toString();
AccountManager accountManager = AccountManager.get(this);
userId = accountManager.getUserData(account,
com.owncloud.android.lib.common.accounts.AccountUtils.Constants.KEY_USER_ID);
} catch (AccountUtils.AccountNotFoundException e) {
Log_OC.e(TAG, "Account not found");
setResultAndExit(EXCEPTION_ACCOUNT_NOT_FOUND);
return;
}
final Bundle result = new Bundle();
result.putString(AccountManager.KEY_ACCOUNT_NAME, account.name);
result.putString(AccountManager.KEY_ACCOUNT_TYPE, MainApp.getAccountType(this));
result.putString(AccountManager.KEY_AUTHTOKEN, NEXTCLOUD_SSO);
result.putString(Constants.SSO_USER_ID, userId);
result.putString(Constants.SSO_TOKEN, token);
result.putString(Constants.SSO_SERVER_URL, serverUrl);
Intent data = new Intent();
data.putExtra(NEXTCLOUD_SSO, result);
setResult(RESULT_OK, data);
finish();
}
}
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