change key password when user switches from client to server side encryption.

make use of the keymanager class in changekeypasscode()

apps/files_encryption/ajax/mode.php

@@ -32,6 +32,7 @@ if ($result->fetchRow()){
 } else {
 	$query = OC_DB::prepare( 'INSERT INTO *PREFIX*encryption ( mode, uid ) VALUES( ?, ? )' );
 }
+
 if ( (!$changePasswd || $passwdChanged) && $query->execute(array($mode, \OCP\User::getUser())) ) {
 	OCP\JSON::success();
 } else {

apps/files_encryption/js/settings-personal.js

@@ -18,14 +18,12 @@ $(document).ready(function(){
 			}
 		} else if (server) {
 			if (prevmode == 'client') {
-		    OC.dialogs.form([{text:'login password', name:'newpasswd', type:'password'},{text:'Encryption password used on the client', name:'oldpasswd', type:'password'}],t('encryption', 'Please enter your passwords'), function(data) {
+		    OC.dialogs.form([{text:'login password', name:'newpasswd', type:'password'},{text:'Encryption password used on the client', name:'oldpasswd', type:'password'}],t('encryption', 'Change encryption password to login password'), function(data) {
 		   		$.post(OC.filePath('files_encryption', 'ajax', 'mode.php'), { mode: 'server', newpasswd: data[0].value, oldpasswd: data[1].value }, function(result) {
 		   			if (result.status != 'success') {
-		   				console.log("change selection back to " + prevmode+'_encryption');
 		   				document.getElementById(prevmode+'_encryption').checked = true;
-		   			} else {
+		   				OC.dialogs.alert(t('encryption', 'Please check your passwords and try again'), t('encryption', 'Could not change encryption password to login password'))
 		   			}
-		   			
 		   		});
 		    });
 			} else {

apps/files_encryption/lib/crypt.php

@@ -412,21 +412,23 @@ class Crypt {
 	}
 
 	public static function changekeypasscode($oldPassword, $newPassword) {
-		if(OCP\User::isLoggedIn()){
-			$username=OCP\USER::getUser();
-			$view=new OC_FilesystemView('/'.$username);
+		if(\OCP\User::isLoggedIn()){
+			$username = \OCP\USER::getUser();
+			$view = new \OC_FilesystemView('/'.$username);
 
 			// read old key
-			$key=$view->file_get_contents('/encryption.key');
+			$key = Keymanager::getPrivateKey();
 
 			// decrypt key with old passcode
-			$key=OC_Crypt::decrypt($key, $oldPassword);
+			if ( ($key = self::decrypt($key, $oldPassword)) ) {
+				// encrypt again with new passcode
+				$key = self::encrypt($key, $newPassword);
 
-			// encrypt again with new passcode
-			$key=OC_Crypt::encrypt($key, $newPassword);
-
-			// store the new key
-			$view->file_put_contents('/encryption.key', $key );
+				// store the new key
+				return Keymanager::setPrivateKey($key);
+			} else {
+				return false;
+			}
 		}
 	}
 

apps/files_encryption/lib/keymanager.php

@@ -200,9 +200,12 @@ class Keymanager {
 	}
 	
 	public static function changePasswd($oldpasswd, $newpasswd) {
-		//TODO change password of private key
-		error_log("password changed from '$oldpasswd' to '$newpasswd'");
-		return true;
+		if ( \OCP\User::checkPassword(\OCP\User::getUser(), $newpasswd) ) {
+			return Crypt::changekeypasscode($oldpasswd, $newpasswd);
+		} else {
+			return false;
+		}
+	
 	}
 	
 }