fix: encrypt and store password, decrypt and retrieve the same

lib/private/Authentication/LoginCredentials/Store.php

@@ -8,13 +8,15 @@
  */
 namespace OC\Authentication\LoginCredentials;
 
+use Exception;
 use OC\Authentication\Exceptions\PasswordlessTokenException;
 use OC\Authentication\Token\IProvider;
 use OCP\Authentication\Exceptions\CredentialsUnavailableException;
 use OCP\Authentication\Exceptions\InvalidTokenException;
 use OCP\Authentication\LoginCredentials\ICredentials;
 use OCP\Authentication\LoginCredentials\IStore;
 use OCP\ISession;
+use OCP\Security\ICrypto;
 use OCP\Session\Exceptions\SessionNotAvailableException;
 use OCP\Util;
 use Psr\Log\LoggerInterface;
@@ -29,9 +31,12 @@ class Store implements IStore {
 	/** @var IProvider|null */
 	private $tokenProvider;
 
-	public function __construct(ISession $session,
+	public function __construct(
+		ISession $session,
 		LoggerInterface $logger,
-		?IProvider $tokenProvider = null) {
+		private readonly ICrypto $crypto,
+		?IProvider $tokenProvider = null,
+	) {
 		$this->session = $session;
 		$this->logger = $logger;
 		$this->tokenProvider = $tokenProvider;
@@ -45,6 +50,7 @@ public function __construct(ISession $session,
 	 * @param array $params
 	 */
 	public function authenticate(array $params) {
+		$params['password'] = $this->crypto->encrypt((string)$params['password']);
 		$this->session->set('login_credentials', json_encode($params));
 	}
 
@@ -91,6 +97,11 @@ public function getLoginCredentials(): ICredentials {
 		if ($trySession && $this->session->exists('login_credentials')) {
 			/** @var array $creds */
 			$creds = json_decode($this->session->get('login_credentials'), true);
+			try {
+				$creds['password'] = $this->crypto->decrypt($creds['password']);
+			} catch (Exception $e) {
+				//decryption failed, continue with old password as it is
+			}
 			return new Credentials(
 				$creds['uid'],
 				$creds['loginName'] ?? $this->session->get('loginname') ?? $creds['uid'], // Pre 20 didn't have a loginName property, hence fall back to the session value and then to the UID

lib/private/Server.php

@@ -451,7 +451,8 @@ public function __construct($webRoot, \OC\Config $config) {
 				$tokenProvider = null;
 			}
 			$logger = $c->get(LoggerInterface::class);
-			return new Store($session, $logger, $tokenProvider);
+			$crypto = $c->get(ICrypto::class);
+			return new Store($session, $logger, $crypto, $tokenProvider);
 		});
 		$this->registerAlias(IStore::class, Store::class);
 		$this->registerAlias(IProvider::class, Authentication\Token\Manager::class);

tests/lib/Authentication/LoginCredentials/StoreTest.php

@@ -15,6 +15,7 @@
 use OC\Authentication\Token\IToken;
 use OCP\Authentication\Exceptions\CredentialsUnavailableException;
 use OCP\ISession;
+use OCP\Security\ICrypto;
 use OCP\Session\Exceptions\SessionNotAvailableException;
 use Psr\Log\LoggerInterface;
 use Test\TestCase;
@@ -29,6 +30,8 @@ class StoreTest extends TestCase {
 
 	/** @var LoggerInterface|\PHPUnit\Framework\MockObject\MockObject */
 	private $logger;
+	/** @var ICrypto|\PHPUnit\Framework\MockObject\MockObject */
+	private $crypto;
 
 	/** @var Store */
 	private $store;
@@ -39,20 +42,24 @@ protected function setUp(): void {
 		$this->session = $this->createMock(ISession::class);
 		$this->tokenProvider = $this->createMock(IProvider::class);
 		$this->logger = $this->createMock(LoggerInterface::class);
+		$this->crypto = $this->createMock(ICrypto::class);
 
-		$this->store = new Store($this->session, $this->logger, $this->tokenProvider);
+		$this->store = new Store($this->session, $this->logger, $this->crypto, $this->tokenProvider);
 	}
 
 	public function testAuthenticate(): void {
 		$params = [
 			'run' => true,
 			'uid' => 'user123',
-			'password' => 123456,
+			'password' => '123456',
 		];
 
 		$this->session->expects($this->once())
 			->method('set')
 			->with($this->equalTo('login_credentials'), $this->equalTo(json_encode($params)));
+		$this->crypto->expects($this->once())
+			->method('encrypt')
+			->willReturn('123456');
 
 		$this->store->authenticate($params);
 	}
@@ -65,7 +72,7 @@ public function testSetSession(): void {
 	}
 
 	public function testGetLoginCredentialsNoTokenProvider(): void {
-		$this->store = new Store($this->session, $this->logger, null);
+		$this->store = new Store($this->session, $this->logger, $this->crypto, null);
 
 		$this->expectException(CredentialsUnavailableException::class);
 
@@ -139,6 +146,9 @@ public function testGetLoginCredentialsPartialCredentialsAndSessionName(): void
 			->method('exists')
 			->with($this->equalTo('login_credentials'))
 			->willReturn(true);
+		$this->crypto->expects($this->once())
+			->method('decrypt')
+			->willReturn($password);
 		$this->session->expects($this->exactly(2))
 			->method('get')
 			->willReturnMap([
@@ -176,6 +186,9 @@ public function testGetLoginCredentialsPartialCredentials(): void {
 			->method('exists')
 			->with($this->equalTo('login_credentials'))
 			->willReturn(true);
+		$this->crypto->expects($this->once())
+			->method('decrypt')
+			->willReturn($password);
 		$this->session->expects($this->exactly(2))
 			->method('get')
 			->willReturnMap([
@@ -214,6 +227,9 @@ public function testGetLoginCredentialsInvalidTokenLoginCredentials(): void {
 			->method('exists')
 			->with($this->equalTo('login_credentials'))
 			->willReturn(true);
+		$this->crypto->expects($this->once())
+			->method('decrypt')
+			->willReturn($password);
 		$this->session->expects($this->once())
 			->method('get')
 			->with($this->equalTo('login_credentials'))