let user update the private key password in case the login password was changed from outside

apps/encryption/appinfo/application.php

@@ -167,6 +167,20 @@ class Application extends \OCP\AppFramework\App {
 			);
 		});
 
+		$container->registerService('SettingsController', function (IAppContainer $c) {
+			$server = $c->getServer();
+			return new \OCA\Encryption\Controller\SettingsController(
+				$c->getAppName(),
+				$server->getRequest(),
+				$server->getL10N($c->getAppName()),
+				$server->getUserManager(),
+				$server->getUserSession(),
+				$c->query('KeyManager'),
+				$c->query('Crypt'),
+				$c->query('Session')
+			);
+		});
+
 		$container->registerService('UserSetup',
 			function (IAppContainer $c) {
 				$server = $c->getServer();

apps/encryption/appinfo/routes.php

@@ -30,6 +30,11 @@ namespace OCA\Encryption\AppInfo;
 		'url' => '/ajax/adminRecovery',
 		'verb' => 'POST'
 	],
+	[
+		'name' => 'Settings#updatePrivateKeyPassword',
+		'url' => '/ajax/updatePrivateKeyPassword',
+		'verb' => 'POST'
+	],
 	[
 		'name' => 'Recovery#changeRecoveryPassword',
 		'url' => '/ajax/changeRecoveryPassword',

apps/encryption/controller/settingscontroller.php

@@ -0,0 +1,144 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+
+namespace OCA\Encryption\Controller;
+
+
+use OCA\Encryption\Crypto\Crypt;
+use OCA\Encryption\KeyManager;
+use OCA\Encryption\Session;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\IL10N;
+use OCP\IRequest;
+use OCP\IUserManager;
+use OCP\IUserSession;
+
+class SettingsController extends Controller {
+
+	/** @var IL10N */
+	private $l;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	/** @var IUserSession */
+	private $userSession;
+
+	/** @var KeyManager */
+	private $keyManager;
+
+	/** @var Crypt */
+	private $crypt;
+
+	/** @var Session */
+	private $session;
+
+	/**
+	 * @param string $AppName
+	 * @param IRequest $request
+	 * @param IL10N $l10n
+	 * @param IUserManager $userManager
+	 * @param IUserSession $userSession
+	 * @param KeyManager $keyManager
+	 * @param Crypt $crypt
+	 * @param Session $session
+	 */
+	public function __construct($AppName,
+								IRequest $request,
+								IL10N $l10n,
+								IUserManager $userManager,
+								IUserSession $userSession,
+								KeyManager $keyManager,
+								Crypt $crypt,
+								Session $session) {
+		parent::__construct($AppName, $request);
+		$this->l = $l10n;
+		$this->userSession = $userSession;
+		$this->userManager = $userManager;
+		$this->keyManager = $keyManager;
+		$this->crypt = $crypt;
+		$this->session = $session;
+	}
+
+
+	/**
+	 * @NoAdminRequired
+	 * @UseSession
+	 *
+	 * @param string $oldPassword
+	 * @param string $newPassword
+	 * @return DataResponse
+	 */
+	public function updatePrivateKeyPassword($oldPassword, $newPassword) {
+		$result = false;
+		$uid = $this->userSession->getUser()->getUID();
+		$errorMessage = $this->l->t('Could not update the private key password.');
+
+		//check if password is correct
+		$passwordCorrect = $this->userManager->checkPassword($uid, $newPassword);
+
+		if ($passwordCorrect !== false) {
+			$encryptedKey = $this->keyManager->getPrivateKey($uid);
+			$decryptedKey = $this->crypt->decryptPrivateKey($encryptedKey, $oldPassword);
+
+			if ($decryptedKey) {
+				$encryptedKey = $this->crypt->symmetricEncryptFileContent($decryptedKey, $newPassword);
+				$header = $this->crypt->generateHeader();
+				if ($encryptedKey) {
+					$this->keyManager->setPrivateKey($uid, $header . $encryptedKey);
+					$this->session->setPrivateKey($decryptedKey);
+					$result = true;
+				}
+			} else {
+				$result = false;
+				$errorMessage = $this->l->t(
+					'The old password was not correct, please try again.');
+			}
+		} else {
+			$result = false;
+			$errorMessage = $this->l->t(
+				'The current log-in password was not correct, please try again.');
+		}
+
+		if ($result === true) {
+			$this->session->setStatus(Session::INIT_SUCCESSFUL);
+			return new DataResponse(
+				array(
+					'status' => 'success',
+					'data' => array(
+						'message' => (string) $this->l->t('Private key password successfully updated.'))
+				)
+			);
+		} else {
+			return new DataResponse(
+				array(
+					'data' => array
+					('message' => (string) $errorMessage)
+				)
+			);
+		}
+
+	}
+
+
+}

apps/encryption/tests/controller/SettingsControllerTest.php

@@ -0,0 +1,221 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+
+namespace OCA\Encryption\Tests\Controller;
+
+
+use OCA\Encryption\Controller\SettingsController;
+use OCA\Encryption\Session;
+use Test\TestCase;
+
+class SettingsControllerTest extends TestCase {
+
+	/** @var SettingsController */
+	private $controller;
+
+	/** @var \PHPUnit_Framework_MockObject_MockObject */
+	private $requestMock;
+
+	/** @var \PHPUnit_Framework_MockObject_MockObject */
+	private $l10nMock;
+
+	/** @var \PHPUnit_Framework_MockObject_MockObject */
+	private $userManagerMock;
+
+	/** @var \PHPUnit_Framework_MockObject_MockObject */
+	private $userSessionMock;
+
+	/** @var \PHPUnit_Framework_MockObject_MockObject */
+	private $keyManagerMock;
+
+	/** @var \PHPUnit_Framework_MockObject_MockObject */
+	private $cryptMock;
+
+	/** @var \PHPUnit_Framework_MockObject_MockObject */
+	private $sessionMock;
+
+	public function setUp() {
+
+		parent::setUp();
+
+		$this->requestMock = $this->getMock('OCP\IRequest');
+
+		$this->l10nMock = $this->getMockBuilder('OCP\IL10N')
+			->disableOriginalConstructor()->getMock();
+
+		$this->l10nMock->expects($this->any())
+			->method('t')
+			->will($this->returnCallback(function($message) {
+				return $message; }));
+
+		$this->userManagerMock = $this->getMockBuilder('OCP\IUserManager')
+			->disableOriginalConstructor()->getMock();
+
+		$this->keyManagerMock = $this->getMockBuilder('OCA\Encryption\KeyManager')
+			->disableOriginalConstructor()->getMock();
+
+		$this->cryptMock = $this->getMockBuilder('OCA\Encryption\Crypto\Crypt')
+			->disableOriginalConstructor()->getMock();
+
+		$this->userSessionMock = $this->getMockBuilder('OCP\IUserSession')
+			->disableOriginalConstructor()
+			->setMethods([
+				'isLoggedIn',
+				'getUID',
+				'login',
+				'logout',
+				'setUser',
+				'getUser',
+				'canChangePassword'
+			])
+			->getMock();
+
+		$this->userSessionMock->expects($this->any())
+			->method('getUID')
+			->willReturn('testUser');
+
+		$this->userSessionMock->expects($this->any())
+			->method($this->anything())
+			->will($this->returnSelf());
+
+		$this->sessionMock = $this->getMockBuilder('OCA\Encryption\Session')
+			->disableOriginalConstructor()->getMock();
+
+		$this->controller = new SettingsController(
+			'encryption',
+			$this->requestMock,
+			$this->l10nMock,
+			$this->userManagerMock,
+			$this->userSessionMock,
+			$this->keyManagerMock,
+			$this->cryptMock,
+			$this->sessionMock
+		);
+	}
+
+	/**
+	 * test updatePrivateKeyPassword() if wrong new password was entered
+	 */
+	public function testUpdatePrivateKeyPasswordWrongNewPassword() {
+
+		$oldPassword = 'old';
+		$newPassword = 'new';
+
+		$this->userManagerMock
+			->expects($this->once())
+			->method('checkPassword')
+			->willReturn(false);
+
+		$result = $this->controller->updatePrivateKeyPassword($oldPassword, $newPassword);
+
+		$data = $result->getData();
+
+		$this->assertSame('The current log-in password was not correct, please try again.',
+			$data['data']['message']);
+	}
+
+	/**
+	 * test updatePrivateKeyPassword() if wrong old password was entered
+	 */
+	public function testUpdatePrivateKeyPasswordWrongOldPassword() {
+
+		$oldPassword = 'old';
+		$newPassword = 'new';
+
+		$this->userManagerMock
+			->expects($this->once())
+			->method('checkPassword')
+			->willReturn(true);
+
+		$this->cryptMock
+			->expects($this->once())
+			->method('decryptPrivateKey')
+			->willReturn(false);
+
+		$result = $this->controller->updatePrivateKeyPassword($oldPassword, $newPassword);
+
+		$data = $result->getData();
+
+		$this->assertSame('The old password was not correct, please try again.',
+			$data['data']['message']);
+	}
+
+	/**
+	 * test updatePrivateKeyPassword() with the correct old and new password
+	 */
+	public function testUpdatePrivateKeyPassword() {
+
+		$oldPassword = 'old';
+		$newPassword = 'new';
+
+		$this->userSessionMock
+			->expects($this->once())
+			->method('getUID')
+			->willReturn('testUser');
+
+		$this->userManagerMock
+			->expects($this->once())
+			->method('checkPassword')
+			->willReturn(true);
+
+		$this->cryptMock
+			->expects($this->once())
+			->method('decryptPrivateKey')
+			->willReturn('decryptedKey');
+
+		$this->cryptMock
+			->expects($this->once())
+			->method('symmetricEncryptFileContent')
+			->willReturn('encryptedKey');
+
+		$this->cryptMock
+			->expects($this->once())
+			->method('generateHeader')
+			->willReturn('header.');
+
+		// methods which must be called after successful changing the key password
+		$this->keyManagerMock
+			->expects($this->once())
+			->method('setPrivateKey')
+			->with($this->equalTo('testUser'), $this->equalTo('header.encryptedKey'));
+
+		$this->sessionMock
+			->expects($this->once())
+			->method('setPrivateKey')
+			->with($this->equalTo('decryptedKey'));
+
+		$this->sessionMock
+			->expects($this->once())
+			->method('setStatus')
+			->with($this->equalTo(Session::INIT_SUCCESSFUL));
+
+		$result = $this->controller->updatePrivateKeyPassword($oldPassword, $newPassword);
+
+		$data = $result->getData();
+
+		$this->assertSame('success', $data['status']);
+
+		$this->assertSame('Private key password successfully updated.',
+			$data['data']['message']);
+	}
+
+}