Development snapshot

Crypt{} & Util{} unit tests now passing locally
Added keymanager unit tests

apps/files_encryption/hooks/hooks.php

@@ -54,7 +54,7 @@ class Hooks {
 		
 			\OC_FileProxy::$enabled = false;
 			
-			$encryptedKey = Keymanager::getPrivateKey( $params['uid'], $view );
+			$encryptedKey = Keymanager::getPrivateKey( $view, $params['uid'] );
 			
 			\OC_FileProxy::$enabled = true;
 			

apps/files_encryption/lib/crypt.php

@@ -628,7 +628,7 @@ class Crypt {
 	public static function changekeypasscode($oldPassword, $newPassword) {
 
 		if(\OCP\User::isLoggedIn()){
-			$key = Keymanager::getPrivateKey();
+			$key = Keymanager::getPrivateKey( $user, $view );
 			if ( ($key = Crypt::symmetricDecryptFileContent($key,$oldpasswd)) ) {
 				if ( ($key = Crypt::symmetricEncryptFileContent($key, $newpasswd)) ) {
 					Keymanager::setPrivateKey($key);

apps/files_encryption/lib/keymanager.php

@@ -23,7 +23,8 @@
 namespace OCA\Encryption;
 
 /**
- * This class provides basic operations to read/write encryption keys from/to the filesystem 
+ * @brief Class to manage storage and retrieval of encryption keys
+ * @note Where a method requires a view object, it's root must be '/'
  */
 class Keymanager {
 	
@@ -35,60 +36,46 @@ class Keymanager {
 	 * @return string private key or false
 	 * @note the key returned by this method must be decrypted before use
 	 */
-	public static function getPrivateKey( $user, $view ) {
+	public static function getPrivateKey( $view, $user ) {
 	
-		$view->chroot( '/' . $user . '/' . 'files_encryption' );
-		return $view->file_get_contents( '/' . $user.'.private.key' );
-		
+		return $view->file_get_contents( '/' . $user . '/' . 'files_encryption' . '/' . $user.'.private.key' );
 	}
 
 	/**
 	 * @brief retrieve public key for a specified user
 	 * @return string public key or false
 	 */
-	public static function getPublicKey( $userId = NULL ) {
-	
-		// If the username wasn't specified, fetch it
-		if ( ! $userId ) {
-		
-			$userId = \OCP\User::getUser();	
-		
-		}
+	public static function getPublicKey( $view, $userId ) {
 		
-		// Create new view with the right
-		$view = new \OC_FilesystemView( '/public-keys/' );
-		
-		return $view->file_get_contents( '/' . $userId . '.public.key' );
+		return $view->file_get_contents( '/public-keys/' . '/' . $userId . '.public.key' );
 		
 	}
 	
 	/**
 	 * @brief retrieve both keys from a user (private and public)
-	 *
-	 * @return string private key or false
+	 * @return array keys: privateKey, publicKey
 	 */
-	public static function getUserKeys() {
+	public static function getUserKeys( $view, $userId ) {
 	
-	return array(
-			'privatekey' => self::getPrivateKey(),
-			'publickey' => self::getPublicKey(),
+		return array(
+			'publicKey' => self::getPublicKey( $view, $userId )
+			, 'privateKey' => self::getPrivateKey( $view, $userId )
 		);
 	
 	}
 	
 	/**
-	 * @brief retrieve a list of the public key from all users with access to the file
-	 *
-	 * @param string path to file
+	 * @brief Retrieve public keys of all users with access to a file
+	 * @param string $path Path to file
 	 * @return array of public keys for the given file
+	 * @note Checks that the sharing app is enabled should be performed 
+	 * by client code, that isn't checked here
 	 */
-	public static function getPublicKeys( $path ) {
-	
-		$userId = \OCP\User::getUser();
+	public static function getPublicKeys( $view, $userId, $filePath ) {
 		
 		$path = ltrim( $path, '/' );
 		
-		$filepath = '/'.$userId.'/files/'.$path;
+		$filepath = '/' . $userId . '/files/' . $filePath;
 		
 		// Check if sharing is enabled
 		if ( OC_App::isEnabled( 'files_sharing' ) ) {
@@ -157,34 +144,30 @@ class Keymanager {
 	
 	/**
 	 * @brief retrieve keyfile for an encrypted file
-	 *
 	 * @param string file name
 	 * @return string file key or false
 	 * @note The keyfile returned is asymmetrically encrypted. Decryption
 	 * of the keyfile must be performed by client code
 	 */
-	public static function getFileKey( $path, $staticUserClass = 'OCP\User' ) {
+	public static function getFileKey( $view, $userId, $filePath ) {
 		
-		$keypath = ltrim( $path, '/' );
-		$user = $staticUserClass::getUser();
+		$filePath_f = ltrim( $filePath, '/' );
 
-// 		// update $keypath and $user if path point to a file shared by someone else
+// 		// update $keypath and $userId if path point to a file shared by someone else
 // 		$query = \OC_DB::prepare( "SELECT uid_owner, source, target FROM `*PREFIX*sharing` WHERE target = ? AND uid_shared_with = ?" );
 // 		
-// 		$result = $query->execute( array ('/'.$user.'/files/'.$keypath, $user));
+// 		$result = $query->execute( array ('/'.$userId.'/files/'.$keypath, $userId));
 // 		
 // 		if ($row = $result->fetchRow()) {
 // 		
 // 			$keypath = $row['source'];
 // 			$keypath_parts = explode( '/', $keypath );
-// 			$user = $keypath_parts[1];
-// 			$keypath = str_replace( '/' . $user . '/files/', '', $keypath );
+// 			$userId = $keypath_parts[1];
+// 			$keypath = str_replace( '/' . $userId . '/files/', '', $keypath );
 // 			
 // 		}
 		
-		$view = new \OC_FilesystemView('/'.$user.'/files_encryption/keyfiles/');
-		
-		return $view->file_get_contents( $keypath . '.key' );
+		return $this->view->file_get_contents( '/' . $userId . '/files_encryption/keyfiles/' . $filePath_f );
 		
 	}
 	

apps/files_encryption/lib/proxy.php

@@ -91,6 +91,10 @@ class Proxy extends \OC_FileProxy {
 		
 			if ( !is_resource( $data ) ) { //stream put contents should have been converted to fopen
 			
+				$userId = \OCP\USER::getUser();
+				
+				$rootView = new \OC_FilesystemView( '/' );
+			
 				// Set the filesize for userland, before encrypting
 				$size = strlen( $data );
 				
@@ -98,7 +102,7 @@ class Proxy extends \OC_FileProxy {
 				\OC_FileProxy::$enabled = false;
 				
 				// Encrypt plain data and fetch key
-				$encrypted = Crypt::keyEncryptKeyfile( $data, Keymanager::getPublicKey() );
+				$encrypted = Crypt::keyEncryptKeyfile( $data, Keymanager::getPublicKey( $rootView, $userId ) );
 				
 				// Replace plain content with encrypted content by reference
 				$data = $encrypted['data'];
@@ -110,7 +114,7 @@ class Proxy extends \OC_FileProxy {
 				$filePath = '/' . implode( '/', $filePath );
 				
 				# TODO: make keyfile dir dynamic from app config
-				$view = new \OC_FilesystemView( '/' . \OCP\USER::getUser() . '/files_encryption/keyfiles' );
+				$view = new \OC_FilesystemView( '/' . $userId . '/files_encryption/keyfiles' );
 				
 				// Save keyfile for newly encrypted file in parallel directory tree
 				Keymanager::setFileKey( $filePath, $encrypted['key'], $view, '\OC_DB' );

apps/files_encryption/lib/stream.php

@@ -63,7 +63,8 @@ class Stream {
 	private $publicKey;
 	private $keyfile;
 	private $encKeyfile;
-	private static $view;
+	private static $view; // a fsview object set to user dir
+	private $rootView; // a fsview object set to '/'
 
 	public function stream_open( $path, $mode, $options, &$opened_path ) {
 	
@@ -76,6 +77,13 @@ class Stream {
 
 		}
 		
+		// Set rootview object if necessary
+		if ( ! $this->rootView ) {
+
+			$this->rootView = new \OC_FilesystemView( $this->userId . '/' );
+
+		}
+		
 		$this->userId = \OCP\User::getUser();
 		
 		// Get the bare file path
@@ -332,7 +340,7 @@ class Stream {
 		
 			$this->keyfile = Crypt::generateKey();
 			
-			$this->publicKey = Keymanager::getPublicKey( $this->userId );
+			$this->publicKey = Keymanager::getPublicKey( $this->rootView, $this->userId );
 			
 			$this->encKeyfile = Crypt::keyEncrypt( $this->keyfile, $this->publicKey );
 			

apps/files_encryption/tests/crypt.php

@@ -7,21 +7,6 @@
  * See the COPYING-README file.
  */
 
-// Load mockery files
-require_once 'Mockery/Loader.php';
-require_once 'Hamcrest/Hamcrest.php';
-$loader = new \Mockery\Loader;
-$loader->register();
-
-use \Mockery as m;
-
-// Overload Session{} with a mock object before it is included
-$adminEncPriKey = realpath( dirname(__FILE__).'/../../../data/admin/files_encryption/admin.private.key' );
-$adminDePriKey = OCA\Encryption\Crypt::symmetricDecryptFileContent( $adminEncPriKey, 'admin' );
-
-$mockSession = m::mock('overload:OCA\Encryption\Session');
-$mockSession->shouldReceive( 'getPrivateKey' )->andReturn( file_get_contents( $adminDePriKey ) );
-
 //require_once "PHPUnit/Framework/TestCase.php";
 require_once realpath( dirname(__FILE__).'/../../../3rdparty/Crypt_Blowfish/Blowfish.php' );
 require_once realpath( dirname(__FILE__).'/../../../lib/base.php' );
@@ -38,7 +23,13 @@ use OCA\Encryption;
 // encryption key needs to be saved in the session
 \OC_User::login( 'admin', 'admin' );
 
-//trigger_error("session = ".var_export($_SESSION, 1));
+/**
+ * @note It would be better to use Mockery here for mocking out the session 
+ * handling process, and isolate calls to session class and data from the unit 
+ * tests relating to them (stream etc.). However getting mockery to work and 
+ * overload classes whilst also using the OC autoloader is difficult due to 
+ * load order Pear errors.
+ */
 
 class Test_Crypt extends \PHPUnit_Framework_TestCase {
 	
@@ -66,8 +57,6 @@ class Test_Crypt extends \PHPUnit_Framework_TestCase {
 	
 	function tearDown() {
 	
-		m::close();
-	
 	}
 
 	function testGenerateKey() {
@@ -247,7 +236,7 @@ class Test_Crypt extends \PHPUnit_Framework_TestCase {
 		$this->assertNotEquals( $this->dataShort, $retreivedCryptedFile );
 		
 		// Get private key
-		$encryptedPrivateKey = Encryption\Keymanager::getPrivateKey( $this->userId, $this->view );
+		$encryptedPrivateKey = Encryption\Keymanager::getPrivateKey( $this->view, $this->userId );
 		
 		$decryptedPrivateKey = Encryption\Crypt::symmetricDecryptFileContent( $encryptedPrivateKey, $this->pass );
 		
@@ -303,7 +292,7 @@ class Test_Crypt extends \PHPUnit_Framework_TestCase {
 		
 		
 		// Get private key
-		$encryptedPrivateKey = Encryption\Keymanager::getPrivateKey( $this->userId, $this->view );
+		$encryptedPrivateKey = Encryption\Keymanager::getPrivateKey( $this->view, $this->userId );
 		
 		$decryptedPrivateKey = Encryption\Crypt::symmetricDecryptFileContent( $encryptedPrivateKey, $this->pass );
 		

apps/files_encryption/tests/keymanager.php

@@ -25,10 +25,14 @@ class Test_Keymanager extends \PHPUnit_Framework_TestCase {
 		$this->data = realpath( dirname(__FILE__).'/../lib/crypt.php' );
 		$this->user = 'admin';
 		$this->passphrase = 'admin';
+		$this->filePath = '/testing';
 		$this->view = new \OC_FilesystemView( '' );
 		
 		// Disable encryption proxy to prevent recursive calls
 		\OC_FileProxy::$enabled = false;
+		
+		// Notify system which iser is logged in etc.
+		\OC_User::setUserId( 'admin' );
 	
 	}
 	
@@ -38,17 +42,29 @@ class Test_Keymanager extends \PHPUnit_Framework_TestCase {
 		
 	}
 
-	function testGetEncryptedPrivateKey() {
+	function testGetPrivateKey() {
 	
-		$key = Encryption\Keymanager::getPrivateKey( $this->user, $this->view );
-		
-		$this->assertEquals( 2302, strlen( $key ) );
+		$key = Encryption\Keymanager::getPrivateKey( $this->view, $this->user );
+		 
+		 
+		 // Will this length vary? Perhaps we should use a range instead
+		$this->assertEquals( 2296, strlen( $key ) );
 	
 	}
 	
+	function testGetPublicKey() {
+
+		$key = Encryption\Keymanager::getPublicKey( $this->view, $this->user );
+		
+		$this->assertEquals( 451, strlen( $key ) );
+		
+		$this->assertEquals( '-----BEGIN PUBLIC KEY-----', substr( $key, 0, 26 ) );
+	}
+	
 	function testSetFileKey() {
 	
-		# NOTE: This cannot be tested until we are able to break out of the FileSystemView data directory root
+		# NOTE: This cannot be tested until we are able to break out 
+		# of the FileSystemView data directory root
 	
 // 		$key = Crypt::symmetricEncryptFileContentKeyfile( $this->data, 'hat' );
 // 		
@@ -62,21 +78,39 @@ class Test_Keymanager extends \PHPUnit_Framework_TestCase {
 	
 	}
 	
-	function testGetDecryptedPrivateKey() {
+	function testGetPrivateKey_decrypt() {
 	
-		$key = Encryption\Keymanager::getPrivateKey( $this->user, $this->view );
+		$key = Encryption\Keymanager::getPrivateKey( $this->view, $this->user );
 		
 		# TODO: replace call to Crypt with a mock object?
 		$decrypted = Encryption\Crypt::symmetricDecryptFileContent( $key, $this->passphrase );
 		
-		var_dump($decrypted);
-		
-		$this->assertEquals( 1708, strlen( $decrypted ) );
+		$this->assertEquals( 1704, strlen( $decrypted ) );
 		
 		$this->assertEquals( '-----BEGIN PRIVATE KEY-----', substr( $decrypted, 0, 27 ) );
 	
 	}
 	
+	function testGetUserKeys() {
+	
+		$keys = Encryption\Keymanager::getUserKeys( $this->view, $this->user );
+		
+		$this->assertEquals( 451, strlen( $keys['publicKey'] ) );
+		$this->assertEquals( '-----BEGIN PUBLIC KEY-----', substr( $keys['publicKey'], 0, 26 ) );
+		$this->assertEquals( 2296, strlen( $keys['privateKey'] ) );
 	
+	}
+	
+	function testGetPublicKeys() {
+		
+		# TODO: write me
+		
+	}
+	
+	function testGetFileKey() {
+	
+// 		Encryption\Keymanager::getFileKey( $this->view, $this->user, $this->filePath );
+	
+	}
 	
 }