VancedMicroG/src/org/microg/gms/auth/loginservice/GoogleLoginService.java

/*
 * Copyright 2013-2015 µg Project Team
 *
 * 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 org.microg.gms.auth.loginservice;

import android.accounts.AbstractAccountAuthenticator;
import android.accounts.Account;
import android.accounts.AccountAuthenticatorResponse;
import android.accounts.AccountManager;
import android.accounts.NetworkErrorException;
import android.app.Service;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Base64;
import android.util.Log;

import com.google.android.gms.R;

import org.microg.gms.auth.AskPermissionActivity;
import org.microg.gms.auth.AuthManager;
import org.microg.gms.auth.AuthResponse;
import org.microg.gms.auth.login.LoginActivity;
import org.microg.gms.common.PackageUtils;

import java.util.Arrays;
import java.util.List;

import static android.accounts.AccountManager.ACTION_AUTHENTICATOR_INTENT;
import static android.accounts.AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE;
import static android.accounts.AccountManager.KEY_ACCOUNT_NAME;
import static android.accounts.AccountManager.KEY_ACCOUNT_TYPE;
import static android.accounts.AccountManager.KEY_ANDROID_PACKAGE_NAME;
import static android.accounts.AccountManager.KEY_AUTHTOKEN;
import static android.accounts.AccountManager.KEY_BOOLEAN_RESULT;
import static android.accounts.AccountManager.KEY_CALLER_UID;
import static android.accounts.AccountManager.KEY_INTENT;

public class GoogleLoginService extends Service {
    private static final String TAG = "GmsAuthLoginSvc";

    private String accountType;

    @Override
    public void onCreate() {
        super.onCreate();
        accountType = getString(R.string.google_account_type);
    }

    @Override
    public IBinder onBind(Intent intent) {
        if (intent.getAction().equals(ACTION_AUTHENTICATOR_INTENT)) {
            return new AbstractAccountAuthenticator(this) {
                @Override
                public Bundle editProperties(AccountAuthenticatorResponse response, String accountType) {
                    Log.d(TAG, "editProperties: " + accountType);
                    return null;
                }

                @Override
                public Bundle addAccount(AccountAuthenticatorResponse response, String accountType, String authTokenType, String[] requiredFeatures, Bundle options) throws NetworkErrorException {
                    if (accountType.equals(GoogleLoginService.this.accountType)) {
                        return GoogleLoginService.this.addAccount(response, authTokenType, requiredFeatures, options);
                    }
                    return null;
                }

                @Override
                public Bundle confirmCredentials(AccountAuthenticatorResponse response, Account account, Bundle options) throws NetworkErrorException {
                    Log.d(TAG, "confirmCredentials: " + account + ", " + options);
                    return null;
                }

                @Override
                public Bundle getAuthToken(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options) throws NetworkErrorException {
                    return GoogleLoginService.this.getAuthToken(response, account, authTokenType, options);
                }

                @Override
                public String getAuthTokenLabel(String authTokenType) {
                    Log.d(TAG, "getAuthTokenLabel: " + authTokenType);
                    return null;
                }

                @Override
                public Bundle updateCredentials(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options) throws NetworkErrorException {
                    Log.d(TAG, "updateCredentials: " + account + ", " + authTokenType + ", " + options);
                    return null;
                }

                @Override
                public Bundle hasFeatures(AccountAuthenticatorResponse response, Account account, String[] features) throws NetworkErrorException {
                    return GoogleLoginService.this.hasFeatures(account, features);
                }
            }.getIBinder();
        }
        return null;
    }

    private Bundle hasFeatures(Account account, String[] features) {
        Log.d(TAG, "hasFeatures: " + account + ", " + Arrays.toString(features));
        AccountManager accountManager = AccountManager.get(this);
        List<String> services = Arrays.asList(accountManager.getUserData(account, "services").split(","));
        boolean res = true;
        for (String feature : features) {
            if (feature.startsWith("service_") && !services.contains(feature.substring(8)))
                res = false;
        }
        Bundle result = new Bundle();
        result.putBoolean(KEY_BOOLEAN_RESULT, res);
        return result;
    }

    private Bundle getAuthToken(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options) {
        options.keySet();
        Log.d(TAG, "getAuthToken: " + account + ", " + authTokenType + ", " + options);
        String app = options.getString(KEY_ANDROID_PACKAGE_NAME);
        PackageUtils.checkPackageUid(this, app, options.getInt(KEY_CALLER_UID), options.getInt(KEY_CALLER_UID));
        AuthManager authManager = new AuthManager(this, account.name, app, authTokenType);
        try {
            AuthResponse res = authManager.requestAuth(true);
            if (res.auth != null) {
                Log.d(TAG, "getAuthToken: " + res.auth);
                Bundle result = new Bundle();
                result.putString(KEY_ACCOUNT_TYPE, account.type);
                result.putString(KEY_ACCOUNT_NAME, account.name);
                result.putString(KEY_AUTHTOKEN, res.auth);
                return result;
            } else {
                Bundle result = new Bundle();
                Intent i = new Intent(this, AskPermissionActivity.class);
                i.putExtras(options);
                i.putExtra(KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
                i.putExtra(KEY_ANDROID_PACKAGE_NAME, app);
                i.putExtra(KEY_ACCOUNT_TYPE, account.type);
                i.putExtra(KEY_ACCOUNT_NAME, account.name);
                i.putExtra(KEY_AUTHTOKEN, authTokenType);
                if (res.consentDataBase64 != null)
                    i.putExtra(AskPermissionActivity.EXTRA_CONSENT_DATA, Base64.decode(res.consentDataBase64, Base64.DEFAULT));
                result.putParcelable(KEY_INTENT, i);
                return result;
            }
        } catch (Exception e) {
            Log.w(TAG, e);
            return null;
        }
    }

    private Bundle addAccount(AccountAuthenticatorResponse response, String authTokenType, String[] requiredFeatures, Bundle options) {
        final Intent i = new Intent(GoogleLoginService.this, LoginActivity.class);
        i.putExtras(options);
        i.putExtra(LoginActivity.EXTRA_TMPL, LoginActivity.TMPL_NEW_ACCOUNT);
        i.putExtra(KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);
        final Bundle result = new Bundle();
        result.putParcelable(KEY_INTENT, i);
        return result;
    }
}